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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Olaf Weber3e57ecf2006-06-09 14:48:12 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_types.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_dir2.h"
Nathan Scotta844f452005-11-02 14:38:42 +110028#include "xfs_da_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110030#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_dinode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110034#include "xfs_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110035#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110037#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_extfree_item.h"
39#include "xfs_alloc.h"
40#include "xfs_bmap.h"
41#include "xfs_rtalloc.h"
42#include "xfs_error.h"
Nathan Scottd8cc8902005-11-02 10:34:53 +110043#include "xfs_attr_leaf.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include "xfs_quota.h"
45#include "xfs_trans_space.h"
46#include "xfs_buf_item.h"
David Chinner2a82b8b2007-07-11 11:09:12 +100047#include "xfs_filestream.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100048#include "xfs_vnodeops.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000049#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052kmem_zone_t *xfs_bmap_free_item_zone;
53
54/*
55 * Prototypes for internal bmap routines.
56 */
57
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +000058#ifdef DEBUG
59STATIC void
60xfs_bmap_check_leaf_extents(
61 struct xfs_btree_cur *cur,
62 struct xfs_inode *ip,
63 int whichfork);
64#else
65#define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0)
66#endif
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/*
70 * Called from xfs_bmap_add_attrfork to handle extents format files.
71 */
72STATIC int /* error */
73xfs_bmap_add_attrfork_extents(
74 xfs_trans_t *tp, /* transaction pointer */
75 xfs_inode_t *ip, /* incore inode pointer */
76 xfs_fsblock_t *firstblock, /* first block allocated */
77 xfs_bmap_free_t *flist, /* blocks to free at commit */
78 int *flags); /* inode logging flags */
79
80/*
81 * Called from xfs_bmap_add_attrfork to handle local format files.
82 */
83STATIC int /* error */
84xfs_bmap_add_attrfork_local(
85 xfs_trans_t *tp, /* transaction pointer */
86 xfs_inode_t *ip, /* incore inode pointer */
87 xfs_fsblock_t *firstblock, /* first block allocated */
88 xfs_bmap_free_t *flist, /* blocks to free at commit */
89 int *flags); /* inode logging flags */
90
91/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
93 * It figures out where to ask the underlying allocator to put the new extent.
94 */
95STATIC int /* error */
96xfs_bmap_alloc(
97 xfs_bmalloca_t *ap); /* bmap alloc argument struct */
98
99/*
100 * Transform a btree format file with only one leaf node, where the
101 * extents list will fit in the inode, into an extents format file.
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100102 * Since the file extents are already in-core, all we have to do is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 * give up the space for the btree root and pitch the leaf block.
104 */
105STATIC int /* error */
106xfs_bmap_btree_to_extents(
107 xfs_trans_t *tp, /* transaction pointer */
108 xfs_inode_t *ip, /* incore inode pointer */
109 xfs_btree_cur_t *cur, /* btree cursor */
110 int *logflagsp, /* inode logging flags */
111 int whichfork); /* data or attr fork */
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 * Remove the entry "free" from the free item list. Prev points to the
115 * previous entry, unless "free" is the head of the list.
116 */
117STATIC void
118xfs_bmap_del_free(
119 xfs_bmap_free_t *flist, /* free item list header */
120 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
121 xfs_bmap_free_item_t *free); /* list item to be freed */
122
123/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 * Convert an extents-format file into a btree-format file.
125 * The new file will have a root block (in the inode) and a single child block.
126 */
127STATIC int /* error */
128xfs_bmap_extents_to_btree(
129 xfs_trans_t *tp, /* transaction pointer */
130 xfs_inode_t *ip, /* incore inode pointer */
131 xfs_fsblock_t *firstblock, /* first-block-allocated */
132 xfs_bmap_free_t *flist, /* blocks freed in xaction */
133 xfs_btree_cur_t **curp, /* cursor returned to caller */
134 int wasdel, /* converting a delayed alloc */
135 int *logflagsp, /* inode logging flags */
136 int whichfork); /* data or attr fork */
137
138/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 * Convert a local file to an extents file.
140 * This code is sort of bogus, since the file data needs to get
141 * logged so it won't be lost. The bmap-level manipulations are ok, though.
142 */
143STATIC int /* error */
144xfs_bmap_local_to_extents(
145 xfs_trans_t *tp, /* transaction pointer */
146 xfs_inode_t *ip, /* incore inode pointer */
147 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
148 xfs_extlen_t total, /* total blocks needed by transaction */
149 int *logflagsp, /* inode logging flags */
150 int whichfork); /* data or attr fork */
151
152/*
153 * Search the extents list for the inode, for the extent containing bno.
154 * If bno lies in a hole, point to the next entry. If bno lies past eof,
155 * *eofp will be set, and *prevp will contain the last entry (null if none).
156 * Else, *lastxp will be set to the index of the found
157 * entry; *gotp will contain the entry.
158 */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000159STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160xfs_bmap_search_extents(
161 xfs_inode_t *ip, /* incore inode pointer */
162 xfs_fileoff_t bno, /* block number searched for */
163 int whichfork, /* data or attr fork */
164 int *eofp, /* out: end of file found */
165 xfs_extnum_t *lastxp, /* out: last extent index */
166 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
167 xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */
168
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000169/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 * Compute the worst-case number of indirect blocks that will be used
171 * for ip's delayed extent of length "len".
172 */
173STATIC xfs_filblks_t
174xfs_bmap_worst_indlen(
175 xfs_inode_t *ip, /* incore inode pointer */
176 xfs_filblks_t len); /* delayed extent length */
177
178#ifdef DEBUG
179/*
180 * Perform various validation checks on the values being returned
181 * from xfs_bmapi().
182 */
183STATIC void
184xfs_bmap_validate_ret(
185 xfs_fileoff_t bno,
186 xfs_filblks_t len,
187 int flags,
188 xfs_bmbt_irec_t *mval,
189 int nmap,
190 int ret_nmap);
191#else
192#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
193#endif /* DEBUG */
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195STATIC int
196xfs_bmap_count_tree(
197 xfs_mount_t *mp,
198 xfs_trans_t *tp,
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100199 xfs_ifork_t *ifp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 xfs_fsblock_t blockno,
201 int levelin,
202 int *count);
203
Ruben Porrasc94312d2008-08-13 16:52:25 +1000204STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205xfs_bmap_count_leaves(
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100206 xfs_ifork_t *ifp,
207 xfs_extnum_t idx,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 int numrecs,
209 int *count);
210
Ruben Porrasc94312d2008-08-13 16:52:25 +1000211STATIC void
Yingping Lu91e11082005-11-02 15:10:24 +1100212xfs_bmap_disk_count_leaves(
Christoph Hellwig136341b2008-10-30 17:11:40 +1100213 struct xfs_mount *mp,
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100214 struct xfs_btree_block *block,
Yingping Lu91e11082005-11-02 15:10:24 +1100215 int numrecs,
216 int *count);
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218/*
219 * Bmap internal routines.
220 */
221
Christoph Hellwigfe033cc2008-10-30 16:56:09 +1100222STATIC int /* error */
223xfs_bmbt_lookup_eq(
224 struct xfs_btree_cur *cur,
225 xfs_fileoff_t off,
226 xfs_fsblock_t bno,
227 xfs_filblks_t len,
228 int *stat) /* success/failure */
229{
230 cur->bc_rec.b.br_startoff = off;
231 cur->bc_rec.b.br_startblock = bno;
232 cur->bc_rec.b.br_blockcount = len;
233 return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
234}
235
236STATIC int /* error */
237xfs_bmbt_lookup_ge(
238 struct xfs_btree_cur *cur,
239 xfs_fileoff_t off,
240 xfs_fsblock_t bno,
241 xfs_filblks_t len,
242 int *stat) /* success/failure */
243{
244 cur->bc_rec.b.br_startoff = off;
245 cur->bc_rec.b.br_startblock = bno;
246 cur->bc_rec.b.br_blockcount = len;
247 return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
248}
249
Christoph Hellwig278d0ca2008-10-30 16:56:32 +1100250/*
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000251 * Check if the inode needs to be converted to btree format.
252 */
253static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork)
254{
255 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
256 XFS_IFORK_NEXTENTS(ip, whichfork) >
257 XFS_IFORK_MAXEXT(ip, whichfork);
258}
259
260/*
261 * Check if the inode should be converted to extent format.
262 */
263static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork)
264{
265 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
266 XFS_IFORK_NEXTENTS(ip, whichfork) <=
267 XFS_IFORK_MAXEXT(ip, whichfork);
268}
269
270/*
271 * Update the record referred to by cur to the value given
Christoph Hellwig278d0ca2008-10-30 16:56:32 +1100272 * by [off, bno, len, state].
273 * This either works (return 0) or gets an EFSCORRUPTED error.
274 */
275STATIC int
276xfs_bmbt_update(
277 struct xfs_btree_cur *cur,
278 xfs_fileoff_t off,
279 xfs_fsblock_t bno,
280 xfs_filblks_t len,
281 xfs_exntst_t state)
282{
283 union xfs_btree_rec rec;
284
285 xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state);
286 return xfs_btree_update(cur, &rec);
287}
Christoph Hellwigfe033cc2008-10-30 16:56:09 +1100288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289/*
290 * Called from xfs_bmap_add_attrfork to handle btree format files.
291 */
292STATIC int /* error */
293xfs_bmap_add_attrfork_btree(
294 xfs_trans_t *tp, /* transaction pointer */
295 xfs_inode_t *ip, /* incore inode pointer */
296 xfs_fsblock_t *firstblock, /* first block allocated */
297 xfs_bmap_free_t *flist, /* blocks to free at commit */
298 int *flags) /* inode logging flags */
299{
300 xfs_btree_cur_t *cur; /* btree cursor */
301 int error; /* error return value */
302 xfs_mount_t *mp; /* file system mount struct */
303 int stat; /* newroot status */
304
305 mp = ip->i_mount;
306 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
307 *flags |= XFS_ILOG_DBROOT;
308 else {
Christoph Hellwig561f7d12008-10-30 16:53:59 +1100309 cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 cur->bc_private.b.flist = flist;
311 cur->bc_private.b.firstblock = *firstblock;
312 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
313 goto error0;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000314 /* must be at least one entry */
315 XFS_WANT_CORRUPTED_GOTO(stat == 1, error0);
Christoph Hellwigea77b0a2008-10-30 16:57:28 +1100316 if ((error = xfs_btree_new_iroot(cur, flags, &stat)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 goto error0;
318 if (stat == 0) {
319 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
320 return XFS_ERROR(ENOSPC);
321 }
322 *firstblock = cur->bc_private.b.firstblock;
323 cur->bc_private.b.allocated = 0;
324 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
325 }
326 return 0;
327error0:
328 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
329 return error;
330}
331
332/*
333 * Called from xfs_bmap_add_attrfork to handle extents format files.
334 */
335STATIC int /* error */
336xfs_bmap_add_attrfork_extents(
337 xfs_trans_t *tp, /* transaction pointer */
338 xfs_inode_t *ip, /* incore inode pointer */
339 xfs_fsblock_t *firstblock, /* first block allocated */
340 xfs_bmap_free_t *flist, /* blocks to free at commit */
341 int *flags) /* inode logging flags */
342{
343 xfs_btree_cur_t *cur; /* bmap btree cursor */
344 int error; /* error return value */
345
346 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
347 return 0;
348 cur = NULL;
349 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
350 flags, XFS_DATA_FORK);
351 if (cur) {
352 cur->bc_private.b.allocated = 0;
353 xfs_btree_del_cursor(cur,
354 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
355 }
356 return error;
357}
358
359/*
360 * Called from xfs_bmap_add_attrfork to handle local format files.
361 */
362STATIC int /* error */
363xfs_bmap_add_attrfork_local(
364 xfs_trans_t *tp, /* transaction pointer */
365 xfs_inode_t *ip, /* incore inode pointer */
366 xfs_fsblock_t *firstblock, /* first block allocated */
367 xfs_bmap_free_t *flist, /* blocks to free at commit */
368 int *flags) /* inode logging flags */
369{
370 xfs_da_args_t dargs; /* args for dir/attr code */
371 int error; /* error return value */
372 xfs_mount_t *mp; /* mount structure pointer */
373
374 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
375 return 0;
Al Viroabbede12011-07-26 02:31:30 -0400376 if (S_ISDIR(ip->i_d.di_mode)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 mp = ip->i_mount;
378 memset(&dargs, 0, sizeof(dargs));
379 dargs.dp = ip;
380 dargs.firstblock = firstblock;
381 dargs.flist = flist;
382 dargs.total = mp->m_dirblkfsbs;
383 dargs.whichfork = XFS_DATA_FORK;
384 dargs.trans = tp;
Nathan Scottf6c2d1f2006-06-20 13:04:51 +1000385 error = xfs_dir2_sf_to_block(&dargs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 } else
387 error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
388 XFS_DATA_FORK);
389 return error;
390}
391
392/*
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000393 * Convert a delayed allocation to a real allocation.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 */
395STATIC int /* error */
396xfs_bmap_add_extent_delay_real(
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000397 struct xfs_bmalloca *bma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000399 struct xfs_bmbt_irec *new = &bma->got;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 int diff; /* temp value */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000401 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 int error; /* error return value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 int i; /* temp state */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100404 xfs_ifork_t *ifp; /* inode fork pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 xfs_fileoff_t new_endoff; /* end offset of new entry */
406 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
407 /* left is 0, right is 1, prev is 2 */
408 int rval=0; /* return value (logging flags) */
409 int state = 0;/* state bits, accessed thru macros */
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000410 xfs_filblks_t da_new; /* new count del alloc blocks used */
411 xfs_filblks_t da_old; /* old count del alloc blocks used */
412 xfs_filblks_t temp=0; /* value for da_new calculations */
413 xfs_filblks_t temp2=0;/* value for da_new calculations */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 int tmp_rval; /* partial logging flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000416 ifp = XFS_IFORK_PTR(bma->ip, XFS_DATA_FORK);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000417
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000418 ASSERT(bma->idx >= 0);
419 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000420 ASSERT(!isnullstartblock(new->br_startblock));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000421 ASSERT(!bma->cur ||
422 (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000423
424 XFS_STATS_INC(xs_add_exlist);
425
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426#define LEFT r[0]
427#define RIGHT r[1]
428#define PREV r[2]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 /*
431 * Set up a bunch of variables to make the tests simpler.
432 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000433 ep = xfs_iext_get_ext(ifp, bma->idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 xfs_bmbt_get_all(ep, &PREV);
435 new_endoff = new->br_startoff + new->br_blockcount;
436 ASSERT(PREV.br_startoff <= new->br_startoff);
437 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000438
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000439 da_old = startblockval(PREV.br_startblock);
440 da_new = 0;
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 /*
443 * Set flags determining what part of the previous delayed allocation
444 * extent is being replaced by a real allocation.
445 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000446 if (PREV.br_startoff == new->br_startoff)
447 state |= BMAP_LEFT_FILLING;
448 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
449 state |= BMAP_RIGHT_FILLING;
450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 /*
452 * Check and set flags if this segment has a left neighbor.
453 * Don't set contiguous if the combined extent would be too large.
454 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000455 if (bma->idx > 0) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000456 state |= BMAP_LEFT_VALID;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000457 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT);
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000458
459 if (isnullstartblock(LEFT.br_startblock))
460 state |= BMAP_LEFT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000462
463 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
464 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
465 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
466 LEFT.br_state == new->br_state &&
467 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
468 state |= BMAP_LEFT_CONTIG;
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 /*
471 * Check and set flags if this segment has a right neighbor.
472 * Don't set contiguous if the combined extent would be too large.
473 * Also check for all-three-contiguous being too large.
474 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000475 if (bma->idx < bma->ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000476 state |= BMAP_RIGHT_VALID;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000477 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT);
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000478
479 if (isnullstartblock(RIGHT.br_startblock))
480 state |= BMAP_RIGHT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000482
483 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
484 new_endoff == RIGHT.br_startoff &&
485 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
486 new->br_state == RIGHT.br_state &&
487 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
488 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
489 BMAP_RIGHT_FILLING)) !=
490 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
491 BMAP_RIGHT_FILLING) ||
492 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
493 <= MAXEXTLEN))
494 state |= BMAP_RIGHT_CONTIG;
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 error = 0;
497 /*
498 * Switch out based on the FILLING and CONTIG state bits.
499 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000500 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
501 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
502 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
503 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 /*
505 * Filling in all of a previously delayed allocation extent.
506 * The left and right neighbors are both contiguous with new.
507 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000508 bma->idx--;
509 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
510 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 LEFT.br_blockcount + PREV.br_blockcount +
512 RIGHT.br_blockcount);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000513 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000514
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000515 xfs_iext_remove(bma->ip, bma->idx + 1, 2, state);
516 bma->ip->i_d.di_nextents--;
517 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
519 else {
520 rval = XFS_ILOG_CORE;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000521 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 RIGHT.br_startblock,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000523 RIGHT.br_blockcount, &i);
524 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000526 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000527 error = xfs_btree_delete(bma->cur, &i);
528 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000530 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000531 error = xfs_btree_decrement(bma->cur, 0, &i);
532 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000534 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000535 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 LEFT.br_startblock,
537 LEFT.br_blockcount +
538 PREV.br_blockcount +
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000539 RIGHT.br_blockcount, LEFT.br_state);
540 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 goto done;
542 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 break;
544
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000545 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 /*
547 * Filling in all of a previously delayed allocation extent.
548 * The left neighbor is contiguous, the right is not.
549 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000550 bma->idx--;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000551
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000552 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
553 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
Christoph Hellwigec90c552011-05-23 08:52:53 +0000554 LEFT.br_blockcount + PREV.br_blockcount);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000555 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwigec90c552011-05-23 08:52:53 +0000556
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000557 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
558 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 rval = XFS_ILOG_DEXT;
560 else {
561 rval = 0;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000562 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 LEFT.br_startblock, LEFT.br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000564 &i);
565 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000567 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000568 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 LEFT.br_startblock,
570 LEFT.br_blockcount +
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000571 PREV.br_blockcount, LEFT.br_state);
572 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 goto done;
574 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 break;
576
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000577 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 /*
579 * Filling in all of a previously delayed allocation extent.
580 * The right neighbor is contiguous, the left is not.
581 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000582 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 xfs_bmbt_set_startblock(ep, new->br_startblock);
584 xfs_bmbt_set_blockcount(ep,
585 PREV.br_blockcount + RIGHT.br_blockcount);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000586 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000587
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000588 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
589 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 rval = XFS_ILOG_DEXT;
591 else {
592 rval = 0;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000593 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 RIGHT.br_startblock,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000595 RIGHT.br_blockcount, &i);
596 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000598 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000599 error = xfs_bmbt_update(bma->cur, PREV.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 new->br_startblock,
601 PREV.br_blockcount +
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000602 RIGHT.br_blockcount, PREV.br_state);
603 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 goto done;
605 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 break;
607
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000608 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 /*
610 * Filling in all of a previously delayed allocation extent.
611 * Neither the left nor right neighbors are contiguous with
612 * the new one.
613 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000614 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 xfs_bmbt_set_startblock(ep, new->br_startblock);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000616 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000617
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000618 bma->ip->i_d.di_nextents++;
619 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
621 else {
622 rval = XFS_ILOG_CORE;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000623 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 new->br_startblock, new->br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000625 &i);
626 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000628 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000629 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
630 error = xfs_btree_insert(bma->cur, &i);
631 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000633 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 break;
636
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000637 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 /*
639 * Filling in the first part of a previous delayed allocation.
640 * The left neighbor is contiguous.
641 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000642 trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
643 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 LEFT.br_blockcount + new->br_blockcount);
645 xfs_bmbt_set_startoff(ep,
646 PREV.br_startoff + new->br_blockcount);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000647 trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 temp = PREV.br_blockcount - new->br_blockcount;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000650 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 xfs_bmbt_set_blockcount(ep, temp);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000652 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 rval = XFS_ILOG_DEXT;
654 else {
655 rval = 0;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000656 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 LEFT.br_startblock, LEFT.br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000658 &i);
659 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000661 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000662 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 LEFT.br_startblock,
664 LEFT.br_blockcount +
665 new->br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000666 LEFT.br_state);
667 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 goto done;
669 }
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000670 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
Eric Sandeen9d87c312009-01-14 23:22:07 -0600671 startblockval(PREV.br_startblock));
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000672 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000673 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwigec90c552011-05-23 08:52:53 +0000674
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000675 bma->idx--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 break;
677
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000678 case BMAP_LEFT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 /*
680 * Filling in the first part of a previous delayed allocation.
681 * The left neighbor is not contiguous.
682 */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000683 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 xfs_bmbt_set_startoff(ep, new_endoff);
685 temp = PREV.br_blockcount - new->br_blockcount;
686 xfs_bmbt_set_blockcount(ep, temp);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000687 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
688 bma->ip->i_d.di_nextents++;
689 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
691 else {
692 rval = XFS_ILOG_CORE;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000693 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 new->br_startblock, new->br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000695 &i);
696 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000698 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000699 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
700 error = xfs_btree_insert(bma->cur, &i);
701 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000703 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000705
706 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000707 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
708 bma->firstblock, bma->flist,
709 &bma->cur, 1, &tmp_rval, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 rval |= tmp_rval;
711 if (error)
712 goto done;
713 }
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000714 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
Eric Sandeen9d87c312009-01-14 23:22:07 -0600715 startblockval(PREV.br_startblock) -
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000716 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
717 ep = xfs_iext_get_ext(ifp, bma->idx + 1);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000718 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000719 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 break;
721
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000722 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 /*
724 * Filling in the last part of a previous delayed allocation.
725 * The right neighbor is contiguous with the new allocation.
726 */
727 temp = PREV.br_blockcount - new->br_blockcount;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000728 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 xfs_bmbt_set_blockcount(ep, temp);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000730 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1),
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100731 new->br_startoff, new->br_startblock,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 new->br_blockcount + RIGHT.br_blockcount,
733 RIGHT.br_state);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000734 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
735 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 rval = XFS_ILOG_DEXT;
737 else {
738 rval = 0;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000739 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 RIGHT.br_startblock,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000741 RIGHT.br_blockcount, &i);
742 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000744 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000745 error = xfs_bmbt_update(bma->cur, new->br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 new->br_startblock,
747 new->br_blockcount +
748 RIGHT.br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000749 RIGHT.br_state);
750 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 goto done;
752 }
Christoph Hellwigec90c552011-05-23 08:52:53 +0000753
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000754 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
Eric Sandeen9d87c312009-01-14 23:22:07 -0600755 startblockval(PREV.br_startblock));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000756 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000757 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000758 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwigec90c552011-05-23 08:52:53 +0000759
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000760 bma->idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 break;
762
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000763 case BMAP_RIGHT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 /*
765 * Filling in the last part of a previous delayed allocation.
766 * The right neighbor is not contiguous.
767 */
768 temp = PREV.br_blockcount - new->br_blockcount;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000769 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 xfs_bmbt_set_blockcount(ep, temp);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000771 xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state);
772 bma->ip->i_d.di_nextents++;
773 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
775 else {
776 rval = XFS_ILOG_CORE;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000777 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 new->br_startblock, new->br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000779 &i);
780 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000782 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000783 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
784 error = xfs_btree_insert(bma->cur, &i);
785 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000787 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000789
790 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000791 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
792 bma->firstblock, bma->flist, &bma->cur, 1,
793 &tmp_rval, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 rval |= tmp_rval;
795 if (error)
796 goto done;
797 }
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000798 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
Eric Sandeen9d87c312009-01-14 23:22:07 -0600799 startblockval(PREV.br_startblock) -
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000800 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
801 ep = xfs_iext_get_ext(ifp, bma->idx);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000802 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000803 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwigec90c552011-05-23 08:52:53 +0000804
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000805 bma->idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 break;
807
808 case 0:
809 /*
810 * Filling in the middle part of a previous delayed allocation.
811 * Contiguity is impossible here.
812 * This case is avoided almost all the time.
bpm@sgi.com24446fc2011-01-19 17:41:58 +0000813 *
814 * We start with a delayed allocation:
815 *
816 * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+
817 * PREV @ idx
818 *
819 * and we are allocating:
820 * +rrrrrrrrrrrrrrrrr+
821 * new
822 *
823 * and we set it up for insertion as:
824 * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+
825 * new
826 * PREV @ idx LEFT RIGHT
827 * inserted at idx + 1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 */
829 temp = new->br_startoff - PREV.br_startoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000831 trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_);
bpm@sgi.com24446fc2011-01-19 17:41:58 +0000832 xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */
833 LEFT = *new;
834 RIGHT.br_state = PREV.br_state;
835 RIGHT.br_startblock = nullstartblock(
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000836 (int)xfs_bmap_worst_indlen(bma->ip, temp2));
bpm@sgi.com24446fc2011-01-19 17:41:58 +0000837 RIGHT.br_startoff = new_endoff;
838 RIGHT.br_blockcount = temp2;
839 /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000840 xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state);
841 bma->ip->i_d.di_nextents++;
842 if (bma->cur == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
844 else {
845 rval = XFS_ILOG_CORE;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000846 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 new->br_startblock, new->br_blockcount,
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000848 &i);
849 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000851 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000852 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
853 error = xfs_btree_insert(bma->cur, &i);
854 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +1000856 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000858
859 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000860 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
861 bma->firstblock, bma->flist, &bma->cur,
862 1, &tmp_rval, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 rval |= tmp_rval;
864 if (error)
865 goto done;
866 }
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000867 temp = xfs_bmap_worst_indlen(bma->ip, temp);
868 temp2 = xfs_bmap_worst_indlen(bma->ip, temp2);
Eric Sandeen9d87c312009-01-14 23:22:07 -0600869 diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000870 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
Christoph Hellwigb9b984d2011-09-18 20:40:42 +0000871 if (diff > 0) {
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000872 error = xfs_icsb_modify_counters(bma->ip->i_mount,
Christoph Hellwigb9b984d2011-09-18 20:40:42 +0000873 XFS_SBS_FDBLOCKS,
874 -((int64_t)diff), 0);
875 ASSERT(!error);
876 if (error)
877 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 }
Christoph Hellwigb9b984d2011-09-18 20:40:42 +0000879
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000880 ep = xfs_iext_get_ext(ifp, bma->idx);
Eric Sandeen9d87c312009-01-14 23:22:07 -0600881 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000882 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
883 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
884 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2),
Eric Sandeen9d87c312009-01-14 23:22:07 -0600885 nullstartblock((int)temp2));
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000886 trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
Christoph Hellwigec90c552011-05-23 08:52:53 +0000887
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000888 bma->idx++;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000889 da_new = temp + temp2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 break;
891
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000892 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
893 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
894 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
895 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
896 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
897 case BMAP_LEFT_CONTIG:
898 case BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 /*
900 * These cases are all impossible.
901 */
902 ASSERT(0);
903 }
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000904
905 /* convert to a btree if necessary */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000906 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000907 int tmp_logflags; /* partial log flag return val */
908
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000909 ASSERT(bma->cur == NULL);
910 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
911 bma->firstblock, bma->flist, &bma->cur,
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000912 da_old > 0, &tmp_logflags, XFS_DATA_FORK);
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000913 bma->logflags |= tmp_logflags;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000914 if (error)
915 goto done;
916 }
917
918 /* adjust for changes in reserved delayed indirect blocks */
919 if (da_old || da_new) {
920 temp = da_new;
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000921 if (bma->cur)
922 temp += bma->cur->bc_private.b.allocated;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000923 ASSERT(temp <= da_old);
924 if (temp < da_old)
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000925 xfs_icsb_modify_counters(bma->ip->i_mount,
926 XFS_SBS_FDBLOCKS,
927 (int64_t)(da_old - temp), 0);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000928 }
929
930 /* clear out the allocated field, done with it now in any case. */
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000931 if (bma->cur)
932 bma->cur->bc_private.b.allocated = 0;
933
934 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935done:
Christoph Hellwig572a4cf2011-09-18 20:41:04 +0000936 bma->logflags |= rval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 return error;
938#undef LEFT
939#undef RIGHT
940#undef PREV
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941}
942
943/*
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000944 * Convert an unwritten allocation to a real allocation or vice versa.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 */
946STATIC int /* error */
947xfs_bmap_add_extent_unwritten_real(
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000948 struct xfs_trans *tp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 xfs_inode_t *ip, /* incore inode pointer */
Christoph Hellwigec90c552011-05-23 08:52:53 +0000950 xfs_extnum_t *idx, /* extent number to update/insert */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100952 xfs_bmbt_irec_t *new, /* new data to add to file extents */
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000953 xfs_fsblock_t *first, /* pointer to firstblock variable */
954 xfs_bmap_free_t *flist, /* list of extents to be freed */
Christoph Hellwigb4e91812010-06-23 18:11:15 +1000955 int *logflagsp) /* inode logging flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 xfs_btree_cur_t *cur; /* btree cursor */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000958 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 int error; /* error return value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 int i; /* temp state */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100961 xfs_ifork_t *ifp; /* inode fork pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 xfs_fileoff_t new_endoff; /* end offset of new entry */
963 xfs_exntst_t newext; /* new extent state */
964 xfs_exntst_t oldext; /* old extent state */
965 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
966 /* left is 0, right is 1, prev is 2 */
967 int rval=0; /* return value (logging flags) */
968 int state = 0;/* state bits, accessed thru macros */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000970 *logflagsp = 0;
971
972 cur = *curp;
973 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
974
975 ASSERT(*idx >= 0);
976 ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
977 ASSERT(!isnullstartblock(new->br_startblock));
978
979 XFS_STATS_INC(xs_add_exlist);
980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981#define LEFT r[0]
982#define RIGHT r[1]
983#define PREV r[2]
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +0000984
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 /*
986 * Set up a bunch of variables to make the tests simpler.
987 */
988 error = 0;
Christoph Hellwigec90c552011-05-23 08:52:53 +0000989 ep = xfs_iext_get_ext(ifp, *idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 xfs_bmbt_get_all(ep, &PREV);
991 newext = new->br_state;
992 oldext = (newext == XFS_EXT_UNWRITTEN) ?
993 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
994 ASSERT(PREV.br_state == oldext);
995 new_endoff = new->br_startoff + new->br_blockcount;
996 ASSERT(PREV.br_startoff <= new->br_startoff);
997 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
Christoph Hellwig7574aa92009-11-25 00:00:19 +0000998
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 /*
1000 * Set flags determining what part of the previous oldext allocation
1001 * extent is being replaced by a newext allocation.
1002 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001003 if (PREV.br_startoff == new->br_startoff)
1004 state |= BMAP_LEFT_FILLING;
1005 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
1006 state |= BMAP_RIGHT_FILLING;
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 /*
1009 * Check and set flags if this segment has a left neighbor.
1010 * Don't set contiguous if the combined extent would be too large.
1011 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001012 if (*idx > 0) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001013 state |= BMAP_LEFT_VALID;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001014 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001015
1016 if (isnullstartblock(LEFT.br_startblock))
1017 state |= BMAP_LEFT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001019
1020 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1021 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1022 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1023 LEFT.br_state == newext &&
1024 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1025 state |= BMAP_LEFT_CONTIG;
1026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 /*
1028 * Check and set flags if this segment has a right neighbor.
1029 * Don't set contiguous if the combined extent would be too large.
1030 * Also check for all-three-contiguous being too large.
1031 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001032 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001033 state |= BMAP_RIGHT_VALID;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001034 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001035 if (isnullstartblock(RIGHT.br_startblock))
1036 state |= BMAP_RIGHT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001038
1039 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1040 new_endoff == RIGHT.br_startoff &&
1041 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
1042 newext == RIGHT.br_state &&
1043 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1044 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1045 BMAP_RIGHT_FILLING)) !=
1046 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1047 BMAP_RIGHT_FILLING) ||
1048 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1049 <= MAXEXTLEN))
1050 state |= BMAP_RIGHT_CONTIG;
1051
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 /*
1053 * Switch out based on the FILLING and CONTIG state bits.
1054 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001055 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1056 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
1057 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1058 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 /*
1060 * Setting all of a previous oldext extent to newext.
1061 * The left and right neighbors are both contiguous with new.
1062 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001063 --*idx;
1064
1065 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1066 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 LEFT.br_blockcount + PREV.br_blockcount +
1068 RIGHT.br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001069 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001070
Christoph Hellwigec90c552011-05-23 08:52:53 +00001071 xfs_iext_remove(ip, *idx + 1, 2, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 ip->i_d.di_nextents -= 2;
1073 if (cur == NULL)
1074 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1075 else {
1076 rval = XFS_ILOG_CORE;
1077 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1078 RIGHT.br_startblock,
1079 RIGHT.br_blockcount, &i)))
1080 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001081 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig91cca5df2008-10-30 16:58:01 +11001082 if ((error = xfs_btree_delete(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001084 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig8df4da42008-10-30 16:55:58 +11001085 if ((error = xfs_btree_decrement(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001087 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig91cca5df2008-10-30 16:58:01 +11001088 if ((error = xfs_btree_delete(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001090 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig8df4da42008-10-30 16:55:58 +11001091 if ((error = xfs_btree_decrement(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001093 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1095 LEFT.br_startblock,
1096 LEFT.br_blockcount + PREV.br_blockcount +
1097 RIGHT.br_blockcount, LEFT.br_state)))
1098 goto done;
1099 }
1100 break;
1101
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001102 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 /*
1104 * Setting all of a previous oldext extent to newext.
1105 * The left neighbor is contiguous, the right is not.
1106 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001107 --*idx;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001108
Christoph Hellwigec90c552011-05-23 08:52:53 +00001109 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1110 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
1111 LEFT.br_blockcount + PREV.br_blockcount);
1112 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1113
1114 xfs_iext_remove(ip, *idx + 1, 1, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 ip->i_d.di_nextents--;
1116 if (cur == NULL)
1117 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1118 else {
1119 rval = XFS_ILOG_CORE;
1120 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1121 PREV.br_startblock, PREV.br_blockcount,
1122 &i)))
1123 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001124 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig91cca5df2008-10-30 16:58:01 +11001125 if ((error = xfs_btree_delete(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001127 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig8df4da42008-10-30 16:55:58 +11001128 if ((error = xfs_btree_decrement(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001130 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1132 LEFT.br_startblock,
1133 LEFT.br_blockcount + PREV.br_blockcount,
1134 LEFT.br_state)))
1135 goto done;
1136 }
1137 break;
1138
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001139 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 /*
1141 * Setting all of a previous oldext extent to newext.
1142 * The right neighbor is contiguous, the left is not.
1143 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001144 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 xfs_bmbt_set_blockcount(ep,
1146 PREV.br_blockcount + RIGHT.br_blockcount);
1147 xfs_bmbt_set_state(ep, newext);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001148 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1149 xfs_iext_remove(ip, *idx + 1, 1, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 ip->i_d.di_nextents--;
1151 if (cur == NULL)
1152 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1153 else {
1154 rval = XFS_ILOG_CORE;
1155 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1156 RIGHT.br_startblock,
1157 RIGHT.br_blockcount, &i)))
1158 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001159 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig91cca5df2008-10-30 16:58:01 +11001160 if ((error = xfs_btree_delete(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001162 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwig8df4da42008-10-30 16:55:58 +11001163 if ((error = xfs_btree_decrement(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001165 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1167 new->br_startblock,
1168 new->br_blockcount + RIGHT.br_blockcount,
1169 newext)))
1170 goto done;
1171 }
1172 break;
1173
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001174 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 /*
1176 * Setting all of a previous oldext extent to newext.
1177 * Neither the left nor right neighbors are contiguous with
1178 * the new one.
1179 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001180 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 xfs_bmbt_set_state(ep, newext);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001182 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 if (cur == NULL)
1185 rval = XFS_ILOG_DEXT;
1186 else {
1187 rval = 0;
1188 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1189 new->br_startblock, new->br_blockcount,
1190 &i)))
1191 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001192 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1194 new->br_startblock, new->br_blockcount,
1195 newext)))
1196 goto done;
1197 }
1198 break;
1199
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001200 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 /*
1202 * Setting the first part of a previous oldext extent to newext.
1203 * The left neighbor is contiguous.
1204 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001205 trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_);
1206 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 LEFT.br_blockcount + new->br_blockcount);
1208 xfs_bmbt_set_startoff(ep,
1209 PREV.br_startoff + new->br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001210 trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001211
Christoph Hellwigec90c552011-05-23 08:52:53 +00001212 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 xfs_bmbt_set_startblock(ep,
1214 new->br_startblock + new->br_blockcount);
1215 xfs_bmbt_set_blockcount(ep,
1216 PREV.br_blockcount - new->br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001217 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001218
Christoph Hellwigec90c552011-05-23 08:52:53 +00001219 --*idx;
1220
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 if (cur == NULL)
1222 rval = XFS_ILOG_DEXT;
1223 else {
1224 rval = 0;
1225 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1226 PREV.br_startblock, PREV.br_blockcount,
1227 &i)))
1228 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001229 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 if ((error = xfs_bmbt_update(cur,
1231 PREV.br_startoff + new->br_blockcount,
1232 PREV.br_startblock + new->br_blockcount,
1233 PREV.br_blockcount - new->br_blockcount,
1234 oldext)))
1235 goto done;
Christoph Hellwig8df4da42008-10-30 16:55:58 +11001236 if ((error = xfs_btree_decrement(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 goto done;
Christoph Hellwigb0eab142011-09-18 20:41:06 +00001238 error = xfs_bmbt_update(cur, LEFT.br_startoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 LEFT.br_startblock,
1240 LEFT.br_blockcount + new->br_blockcount,
Christoph Hellwigb0eab142011-09-18 20:41:06 +00001241 LEFT.br_state);
1242 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 goto done;
1244 }
1245 break;
1246
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001247 case BMAP_LEFT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 /*
1249 * Setting the first part of a previous oldext extent to newext.
1250 * The left neighbor is not contiguous.
1251 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001252 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
1254 xfs_bmbt_set_startoff(ep, new_endoff);
1255 xfs_bmbt_set_blockcount(ep,
1256 PREV.br_blockcount - new->br_blockcount);
1257 xfs_bmbt_set_startblock(ep,
1258 new->br_startblock + new->br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001259 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001260
Christoph Hellwigec90c552011-05-23 08:52:53 +00001261 xfs_iext_insert(ip, *idx, 1, new, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 ip->i_d.di_nextents++;
1263 if (cur == NULL)
1264 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1265 else {
1266 rval = XFS_ILOG_CORE;
1267 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1268 PREV.br_startblock, PREV.br_blockcount,
1269 &i)))
1270 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001271 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 if ((error = xfs_bmbt_update(cur,
1273 PREV.br_startoff + new->br_blockcount,
1274 PREV.br_startblock + new->br_blockcount,
1275 PREV.br_blockcount - new->br_blockcount,
1276 oldext)))
1277 goto done;
1278 cur->bc_rec.b = *new;
Christoph Hellwig4b22a572008-10-30 16:57:40 +11001279 if ((error = xfs_btree_insert(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001281 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 }
1283 break;
1284
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001285 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 /*
1287 * Setting the last part of a previous oldext extent to newext.
1288 * The right neighbor is contiguous with the new allocation.
1289 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001290 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 xfs_bmbt_set_blockcount(ep,
1292 PREV.br_blockcount - new->br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001293 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1294
1295 ++*idx;
1296
1297 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1298 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001299 new->br_startoff, new->br_startblock,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 new->br_blockcount + RIGHT.br_blockcount, newext);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001301 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001302
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 if (cur == NULL)
1304 rval = XFS_ILOG_DEXT;
1305 else {
1306 rval = 0;
1307 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1308 PREV.br_startblock,
1309 PREV.br_blockcount, &i)))
1310 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001311 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1313 PREV.br_startblock,
1314 PREV.br_blockcount - new->br_blockcount,
1315 oldext)))
1316 goto done;
Christoph Hellwig637aa502008-10-30 16:55:45 +11001317 if ((error = xfs_btree_increment(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 goto done;
1319 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1320 new->br_startblock,
1321 new->br_blockcount + RIGHT.br_blockcount,
1322 newext)))
1323 goto done;
1324 }
1325 break;
1326
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001327 case BMAP_RIGHT_FILLING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 /*
1329 * Setting the last part of a previous oldext extent to newext.
1330 * The right neighbor is not contiguous.
1331 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001332 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 xfs_bmbt_set_blockcount(ep,
1334 PREV.br_blockcount - new->br_blockcount);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001335 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001336
Christoph Hellwigec90c552011-05-23 08:52:53 +00001337 ++*idx;
1338 xfs_iext_insert(ip, *idx, 1, new, state);
1339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 ip->i_d.di_nextents++;
1341 if (cur == NULL)
1342 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1343 else {
1344 rval = XFS_ILOG_CORE;
1345 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1346 PREV.br_startblock, PREV.br_blockcount,
1347 &i)))
1348 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001349 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1351 PREV.br_startblock,
1352 PREV.br_blockcount - new->br_blockcount,
1353 oldext)))
1354 goto done;
1355 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1356 new->br_startblock, new->br_blockcount,
1357 &i)))
1358 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001359 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 cur->bc_rec.b.br_state = XFS_EXT_NORM;
Christoph Hellwig4b22a572008-10-30 16:57:40 +11001361 if ((error = xfs_btree_insert(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001363 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 }
1365 break;
1366
1367 case 0:
1368 /*
1369 * Setting the middle part of a previous oldext extent to
1370 * newext. Contiguity is impossible here.
1371 * One extent becomes three extents.
1372 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001373 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 xfs_bmbt_set_blockcount(ep,
1375 new->br_startoff - PREV.br_startoff);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001376 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001377
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 r[0] = *new;
1379 r[1].br_startoff = new_endoff;
1380 r[1].br_blockcount =
1381 PREV.br_startoff + PREV.br_blockcount - new_endoff;
1382 r[1].br_startblock = new->br_startblock + new->br_blockcount;
1383 r[1].br_state = oldext;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001384
1385 ++*idx;
1386 xfs_iext_insert(ip, *idx, 2, &r[0], state);
1387
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 ip->i_d.di_nextents += 2;
1389 if (cur == NULL)
1390 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1391 else {
1392 rval = XFS_ILOG_CORE;
1393 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1394 PREV.br_startblock, PREV.br_blockcount,
1395 &i)))
1396 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001397 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 /* new right extent - oldext */
1399 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
1400 r[1].br_startblock, r[1].br_blockcount,
1401 r[1].br_state)))
1402 goto done;
1403 /* new left extent - oldext */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 cur->bc_rec.b = PREV;
Tim Shimmin6a617dd2008-07-18 17:13:04 +10001405 cur->bc_rec.b.br_blockcount =
1406 new->br_startoff - PREV.br_startoff;
Christoph Hellwig4b22a572008-10-30 16:57:40 +11001407 if ((error = xfs_btree_insert(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001409 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Lachlan McIlroyddea2d52008-06-23 13:25:53 +10001410 /*
1411 * Reset the cursor to the position of the new extent
1412 * we are about to insert as we can't trust it after
1413 * the previous insert.
1414 */
1415 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1416 new->br_startblock, new->br_blockcount,
1417 &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 goto done;
Lachlan McIlroyddea2d52008-06-23 13:25:53 +10001419 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 /* new middle extent - newext */
Lachlan McIlroyddea2d52008-06-23 13:25:53 +10001421 cur->bc_rec.b.br_state = new->br_state;
Christoph Hellwig4b22a572008-10-30 16:57:40 +11001422 if ((error = xfs_btree_insert(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001424 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 }
1426 break;
1427
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001428 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1429 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1430 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
1431 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1432 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1433 case BMAP_LEFT_CONTIG:
1434 case BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 /*
1436 * These cases are all impossible.
1437 */
1438 ASSERT(0);
1439 }
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001440
1441 /* convert to a btree if necessary */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00001442 if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) {
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001443 int tmp_logflags; /* partial log flag return val */
1444
1445 ASSERT(cur == NULL);
1446 error = xfs_bmap_extents_to_btree(tp, ip, first, flist, &cur,
1447 0, &tmp_logflags, XFS_DATA_FORK);
1448 *logflagsp |= tmp_logflags;
1449 if (error)
1450 goto done;
1451 }
1452
1453 /* clear out the allocated field, done with it now in any case. */
1454 if (cur) {
1455 cur->bc_private.b.allocated = 0;
1456 *curp = cur;
1457 }
1458
1459 xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460done:
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001461 *logflagsp |= rval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 return error;
1463#undef LEFT
1464#undef RIGHT
1465#undef PREV
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466}
1467
1468/*
Christoph Hellwig1fd044d2011-09-18 20:40:49 +00001469 * Convert a hole to a delayed allocation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 */
Christoph Hellwig1fd044d2011-09-18 20:40:49 +00001471STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472xfs_bmap_add_extent_hole_delay(
1473 xfs_inode_t *ip, /* incore inode pointer */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001474 xfs_extnum_t *idx, /* extent number to update/insert */
Christoph Hellwig1fd044d2011-09-18 20:40:49 +00001475 xfs_bmbt_irec_t *new) /* new data to add to file extents */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476{
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001477 xfs_ifork_t *ifp; /* inode fork pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 xfs_bmbt_irec_t left; /* left neighbor extent entry */
1479 xfs_filblks_t newlen=0; /* new indirect size */
1480 xfs_filblks_t oldlen=0; /* old indirect size */
1481 xfs_bmbt_irec_t right; /* right neighbor extent entry */
1482 int state; /* state bits, accessed thru macros */
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001483 xfs_filblks_t temp=0; /* temp for indirect calculations */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001485 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 state = 0;
Eric Sandeen9d87c312009-01-14 23:22:07 -06001487 ASSERT(isnullstartblock(new->br_startblock));
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001488
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 /*
1490 * Check and set flags if this segment has a left neighbor
1491 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001492 if (*idx > 0) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001493 state |= BMAP_LEFT_VALID;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001494 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001495
1496 if (isnullstartblock(left.br_startblock))
1497 state |= BMAP_LEFT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001499
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 /*
1501 * Check and set flags if the current (right) segment exists.
1502 * If it doesn't exist, we're converting the hole at end-of-file.
1503 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001504 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001505 state |= BMAP_RIGHT_VALID;
Christoph Hellwig2f2b3222011-05-11 15:04:06 +00001506 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001507
1508 if (isnullstartblock(right.br_startblock))
1509 state |= BMAP_RIGHT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 /*
1513 * Set contiguity flags on the left and right neighbors.
1514 * Don't let extents get too large, even if the pieces are contiguous.
1515 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001516 if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
1517 left.br_startoff + left.br_blockcount == new->br_startoff &&
1518 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1519 state |= BMAP_LEFT_CONTIG;
1520
1521 if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
1522 new->br_startoff + new->br_blockcount == right.br_startoff &&
1523 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1524 (!(state & BMAP_LEFT_CONTIG) ||
1525 (left.br_blockcount + new->br_blockcount +
1526 right.br_blockcount <= MAXEXTLEN)))
1527 state |= BMAP_RIGHT_CONTIG;
1528
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 /*
1530 * Switch out based on the contiguity flags.
1531 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001532 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1533 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 /*
1535 * New allocation is contiguous with delayed allocations
1536 * on the left and on the right.
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001537 * Merge all three into a single extent record.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001539 --*idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 temp = left.br_blockcount + new->br_blockcount +
1541 right.br_blockcount;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001542
Christoph Hellwigec90c552011-05-23 08:52:53 +00001543 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1544 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
Eric Sandeen9d87c312009-01-14 23:22:07 -06001545 oldlen = startblockval(left.br_startblock) +
1546 startblockval(new->br_startblock) +
1547 startblockval(right.br_startblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 newlen = xfs_bmap_worst_indlen(ip, temp);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001549 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
Eric Sandeen9d87c312009-01-14 23:22:07 -06001550 nullstartblock((int)newlen));
Christoph Hellwigec90c552011-05-23 08:52:53 +00001551 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001552
Christoph Hellwigec90c552011-05-23 08:52:53 +00001553 xfs_iext_remove(ip, *idx + 1, 1, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 break;
1555
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001556 case BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 /*
1558 * New allocation is contiguous with a delayed allocation
1559 * on the left.
1560 * Merge the new allocation with the left neighbor.
1561 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001562 --*idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 temp = left.br_blockcount + new->br_blockcount;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001564
1565 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1566 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
Eric Sandeen9d87c312009-01-14 23:22:07 -06001567 oldlen = startblockval(left.br_startblock) +
1568 startblockval(new->br_startblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 newlen = xfs_bmap_worst_indlen(ip, temp);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001570 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
Eric Sandeen9d87c312009-01-14 23:22:07 -06001571 nullstartblock((int)newlen));
Christoph Hellwigec90c552011-05-23 08:52:53 +00001572 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 break;
1574
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001575 case BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 /*
1577 * New allocation is contiguous with a delayed allocation
1578 * on the right.
1579 * Merge the new allocation with the right neighbor.
1580 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00001581 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 temp = new->br_blockcount + right.br_blockcount;
Eric Sandeen9d87c312009-01-14 23:22:07 -06001583 oldlen = startblockval(new->br_startblock) +
1584 startblockval(right.br_startblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 newlen = xfs_bmap_worst_indlen(ip, temp);
Christoph Hellwig2f2b3222011-05-11 15:04:06 +00001586 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
1587 new->br_startoff,
Eric Sandeen9d87c312009-01-14 23:22:07 -06001588 nullstartblock((int)newlen), temp, right.br_state);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001589 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 break;
1591
1592 case 0:
1593 /*
1594 * New allocation is not contiguous with another
1595 * delayed allocation.
1596 * Insert a new entry.
1597 */
1598 oldlen = newlen = 0;
Christoph Hellwigec90c552011-05-23 08:52:53 +00001599 xfs_iext_insert(ip, *idx, 1, new, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 break;
1601 }
1602 if (oldlen != newlen) {
1603 ASSERT(oldlen > newlen);
Christoph Hellwig96540c72010-09-30 02:25:55 +00001604 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
Christoph Hellwig54893272011-05-11 15:04:03 +00001605 (int64_t)(oldlen - newlen), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 /*
1607 * Nothing to do for disk quota accounting here.
1608 */
1609 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610}
1611
1612/*
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001613 * Convert a hole to a real allocation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 */
1615STATIC int /* error */
1616xfs_bmap_add_extent_hole_real(
Christoph Hellwigc6534242011-09-18 20:41:05 +00001617 struct xfs_bmalloca *bma,
1618 int whichfork)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619{
Christoph Hellwigc6534242011-09-18 20:41:05 +00001620 struct xfs_bmbt_irec *new = &bma->got;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 int error; /* error return value */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 int i; /* temp state */
1623 xfs_ifork_t *ifp; /* inode fork pointer */
1624 xfs_bmbt_irec_t left; /* left neighbor extent entry */
1625 xfs_bmbt_irec_t right; /* right neighbor extent entry */
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001626 int rval=0; /* return value (logging flags) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 int state; /* state bits, accessed thru macros */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Christoph Hellwigc6534242011-09-18 20:41:05 +00001629 ifp = XFS_IFORK_PTR(bma->ip, whichfork);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001630
Christoph Hellwigc6534242011-09-18 20:41:05 +00001631 ASSERT(bma->idx >= 0);
1632 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001633 ASSERT(!isnullstartblock(new->br_startblock));
Christoph Hellwigc6534242011-09-18 20:41:05 +00001634 ASSERT(!bma->cur ||
1635 !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001636
1637 XFS_STATS_INC(xs_add_exlist);
1638
1639 state = 0;
Christoph Hellwig6ef35542009-11-25 00:00:21 +00001640 if (whichfork == XFS_ATTR_FORK)
1641 state |= BMAP_ATTRFORK;
1642
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 /*
1644 * Check and set flags if this segment has a left neighbor.
1645 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001646 if (bma->idx > 0) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001647 state |= BMAP_LEFT_VALID;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001648 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001649 if (isnullstartblock(left.br_startblock))
1650 state |= BMAP_LEFT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001652
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 /*
1654 * Check and set flags if this segment has a current value.
1655 * Not true if we're inserting into the "hole" at eof.
1656 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001657 if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001658 state |= BMAP_RIGHT_VALID;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001659 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right);
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001660 if (isnullstartblock(right.br_startblock))
1661 state |= BMAP_RIGHT_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 }
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001663
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 /*
1665 * We're inserting a real allocation between "left" and "right".
1666 * Set the contiguity flags. Don't let extents get too large.
1667 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001668 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1669 left.br_startoff + left.br_blockcount == new->br_startoff &&
1670 left.br_startblock + left.br_blockcount == new->br_startblock &&
1671 left.br_state == new->br_state &&
1672 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1673 state |= BMAP_LEFT_CONTIG;
1674
1675 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1676 new->br_startoff + new->br_blockcount == right.br_startoff &&
1677 new->br_startblock + new->br_blockcount == right.br_startblock &&
1678 new->br_state == right.br_state &&
1679 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1680 (!(state & BMAP_LEFT_CONTIG) ||
1681 left.br_blockcount + new->br_blockcount +
1682 right.br_blockcount <= MAXEXTLEN))
1683 state |= BMAP_RIGHT_CONTIG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001685 error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 /*
1687 * Select which case we're in here, and implement it.
1688 */
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001689 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1690 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 /*
1692 * New allocation is contiguous with real allocations on the
1693 * left and on the right.
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001694 * Merge all three into a single extent record.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001696 --bma->idx;
1697 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1698 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 left.br_blockcount + new->br_blockcount +
1700 right.br_blockcount);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001701 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001702
Christoph Hellwigc6534242011-09-18 20:41:05 +00001703 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
Christoph Hellwigec90c552011-05-23 08:52:53 +00001704
Christoph Hellwigc6534242011-09-18 20:41:05 +00001705 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
1706 XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1);
1707 if (bma->cur == NULL) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06001708 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001709 } else {
1710 rval = XFS_ILOG_CORE;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001711 error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff,
1712 right.br_startblock, right.br_blockcount,
1713 &i);
1714 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001715 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001716 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001717 error = xfs_btree_delete(bma->cur, &i);
1718 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001719 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001720 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001721 error = xfs_btree_decrement(bma->cur, 0, &i);
1722 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001723 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001724 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001725 error = xfs_bmbt_update(bma->cur, left.br_startoff,
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001726 left.br_startblock,
1727 left.br_blockcount +
1728 new->br_blockcount +
1729 right.br_blockcount,
Christoph Hellwigc6534242011-09-18 20:41:05 +00001730 left.br_state);
1731 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001732 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 }
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001734 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001736 case BMAP_LEFT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 /*
1738 * New allocation is contiguous with a real allocation
1739 * on the left.
1740 * Merge the new allocation with the left neighbor.
1741 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001742 --bma->idx;
1743 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1744 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 left.br_blockcount + new->br_blockcount);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001746 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001747
Christoph Hellwigc6534242011-09-18 20:41:05 +00001748 if (bma->cur == NULL) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06001749 rval = xfs_ilog_fext(whichfork);
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001750 } else {
1751 rval = 0;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001752 error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff,
1753 left.br_startblock, left.br_blockcount,
1754 &i);
1755 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001756 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001757 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001758 error = xfs_bmbt_update(bma->cur, left.br_startoff,
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001759 left.br_startblock,
1760 left.br_blockcount +
1761 new->br_blockcount,
Christoph Hellwigc6534242011-09-18 20:41:05 +00001762 left.br_state);
1763 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001764 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 }
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001766 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
Christoph Hellwig7574aa92009-11-25 00:00:19 +00001768 case BMAP_RIGHT_CONTIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 /*
1770 * New allocation is contiguous with a real allocation
1771 * on the right.
1772 * Merge the new allocation with the right neighbor.
1773 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001774 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1775 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx),
Christoph Hellwig2f2b3222011-05-11 15:04:06 +00001776 new->br_startoff, new->br_startblock,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 new->br_blockcount + right.br_blockcount,
1778 right.br_state);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001779 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001780
Christoph Hellwigc6534242011-09-18 20:41:05 +00001781 if (bma->cur == NULL) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06001782 rval = xfs_ilog_fext(whichfork);
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001783 } else {
1784 rval = 0;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001785 error = xfs_bmbt_lookup_eq(bma->cur,
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001786 right.br_startoff,
1787 right.br_startblock,
Christoph Hellwigc6534242011-09-18 20:41:05 +00001788 right.br_blockcount, &i);
1789 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001790 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001791 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001792 error = xfs_bmbt_update(bma->cur, new->br_startoff,
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001793 new->br_startblock,
1794 new->br_blockcount +
1795 right.br_blockcount,
Christoph Hellwigc6534242011-09-18 20:41:05 +00001796 right.br_state);
1797 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001798 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 }
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001800 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801
1802 case 0:
1803 /*
1804 * New allocation is not contiguous with another
1805 * real allocation.
1806 * Insert a new entry.
1807 */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001808 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
1809 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
1810 XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1);
1811 if (bma->cur == NULL) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06001812 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001813 } else {
1814 rval = XFS_ILOG_CORE;
Christoph Hellwigc6534242011-09-18 20:41:05 +00001815 error = xfs_bmbt_lookup_eq(bma->cur,
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001816 new->br_startoff,
1817 new->br_startblock,
Christoph Hellwigc6534242011-09-18 20:41:05 +00001818 new->br_blockcount, &i);
1819 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001820 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001821 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
Christoph Hellwigc6534242011-09-18 20:41:05 +00001822 bma->cur->bc_rec.b.br_state = new->br_state;
1823 error = xfs_btree_insert(bma->cur, &i);
1824 if (error)
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001825 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10001826 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 }
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001828 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 }
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001830
1831 /* convert to a btree if necessary */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00001832 if (xfs_bmap_needs_btree(bma->ip, whichfork)) {
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001833 int tmp_logflags; /* partial log flag return val */
1834
Christoph Hellwigc6534242011-09-18 20:41:05 +00001835 ASSERT(bma->cur == NULL);
1836 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
1837 bma->firstblock, bma->flist, &bma->cur,
1838 0, &tmp_logflags, whichfork);
1839 bma->logflags |= tmp_logflags;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00001840 if (error)
1841 goto done;
1842 }
1843
1844 /* clear out the allocated field, done with it now in any case. */
Christoph Hellwigc6534242011-09-18 20:41:05 +00001845 if (bma->cur)
1846 bma->cur->bc_private.b.allocated = 0;
1847
1848 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork);
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001849done:
Christoph Hellwigc6534242011-09-18 20:41:05 +00001850 bma->logflags |= rval;
Olaf Weber3e57ecf2006-06-09 14:48:12 +10001851 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852}
1853
Nathan Scottdd9f4382006-01-11 15:28:28 +11001854/*
1855 * Adjust the size of the new extent based on di_extsize and rt extsize.
1856 */
1857STATIC int
1858xfs_bmap_extsize_align(
1859 xfs_mount_t *mp,
1860 xfs_bmbt_irec_t *gotp, /* next extent pointer */
1861 xfs_bmbt_irec_t *prevp, /* previous extent pointer */
1862 xfs_extlen_t extsz, /* align to this extent size */
1863 int rt, /* is this a realtime inode? */
1864 int eof, /* is extent at end-of-file? */
1865 int delay, /* creating delalloc extent? */
1866 int convert, /* overwriting unwritten extent? */
1867 xfs_fileoff_t *offp, /* in/out: aligned offset */
1868 xfs_extlen_t *lenp) /* in/out: aligned length */
1869{
1870 xfs_fileoff_t orig_off; /* original offset */
1871 xfs_extlen_t orig_alen; /* original length */
1872 xfs_fileoff_t orig_end; /* original off+len */
1873 xfs_fileoff_t nexto; /* next file offset */
1874 xfs_fileoff_t prevo; /* previous file offset */
1875 xfs_fileoff_t align_off; /* temp for offset */
1876 xfs_extlen_t align_alen; /* temp for length */
1877 xfs_extlen_t temp; /* temp for calculations */
1878
1879 if (convert)
1880 return 0;
1881
1882 orig_off = align_off = *offp;
1883 orig_alen = align_alen = *lenp;
1884 orig_end = orig_off + orig_alen;
1885
1886 /*
1887 * If this request overlaps an existing extent, then don't
1888 * attempt to perform any additional alignment.
1889 */
1890 if (!delay && !eof &&
1891 (orig_off >= gotp->br_startoff) &&
1892 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
1893 return 0;
1894 }
1895
1896 /*
1897 * If the file offset is unaligned vs. the extent size
1898 * we need to align it. This will be possible unless
1899 * the file was previously written with a kernel that didn't
1900 * perform this alignment, or if a truncate shot us in the
1901 * foot.
1902 */
1903 temp = do_mod(orig_off, extsz);
1904 if (temp) {
1905 align_alen += temp;
1906 align_off -= temp;
1907 }
1908 /*
1909 * Same adjustment for the end of the requested area.
1910 */
1911 if ((temp = (align_alen % extsz))) {
1912 align_alen += extsz - temp;
1913 }
1914 /*
1915 * If the previous block overlaps with this proposed allocation
1916 * then move the start forward without adjusting the length.
1917 */
1918 if (prevp->br_startoff != NULLFILEOFF) {
1919 if (prevp->br_startblock == HOLESTARTBLOCK)
1920 prevo = prevp->br_startoff;
1921 else
1922 prevo = prevp->br_startoff + prevp->br_blockcount;
1923 } else
1924 prevo = 0;
1925 if (align_off != orig_off && align_off < prevo)
1926 align_off = prevo;
1927 /*
1928 * If the next block overlaps with this proposed allocation
1929 * then move the start back without adjusting the length,
1930 * but not before offset 0.
1931 * This may of course make the start overlap previous block,
1932 * and if we hit the offset 0 limit then the next block
1933 * can still overlap too.
1934 */
1935 if (!eof && gotp->br_startoff != NULLFILEOFF) {
1936 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
1937 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
1938 nexto = gotp->br_startoff + gotp->br_blockcount;
1939 else
1940 nexto = gotp->br_startoff;
1941 } else
1942 nexto = NULLFILEOFF;
1943 if (!eof &&
1944 align_off + align_alen != orig_end &&
1945 align_off + align_alen > nexto)
1946 align_off = nexto > align_alen ? nexto - align_alen : 0;
1947 /*
1948 * If we're now overlapping the next or previous extent that
1949 * means we can't fit an extsz piece in this hole. Just move
1950 * the start forward to the first valid spot and set
1951 * the length so we hit the end.
1952 */
1953 if (align_off != orig_off && align_off < prevo)
1954 align_off = prevo;
1955 if (align_off + align_alen != orig_end &&
1956 align_off + align_alen > nexto &&
1957 nexto != NULLFILEOFF) {
1958 ASSERT(nexto > prevo);
1959 align_alen = nexto - align_off;
1960 }
1961
1962 /*
1963 * If realtime, and the result isn't a multiple of the realtime
1964 * extent size we need to remove blocks until it is.
1965 */
1966 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
1967 /*
1968 * We're not covering the original request, or
1969 * we won't be able to once we fix the length.
1970 */
1971 if (orig_off < align_off ||
1972 orig_end > align_off + align_alen ||
1973 align_alen - temp < orig_alen)
1974 return XFS_ERROR(EINVAL);
1975 /*
1976 * Try to fix it by moving the start up.
1977 */
1978 if (align_off + temp <= orig_off) {
1979 align_alen -= temp;
1980 align_off += temp;
1981 }
1982 /*
1983 * Try to fix it by moving the end in.
1984 */
1985 else if (align_off + align_alen - temp >= orig_end)
1986 align_alen -= temp;
1987 /*
1988 * Set the start to the minimum then trim the length.
1989 */
1990 else {
1991 align_alen -= orig_off - align_off;
1992 align_off = orig_off;
1993 align_alen -= align_alen % mp->m_sb.sb_rextsize;
1994 }
1995 /*
1996 * Result doesn't cover the request, fail it.
1997 */
1998 if (orig_off < align_off || orig_end > align_off + align_alen)
1999 return XFS_ERROR(EINVAL);
2000 } else {
2001 ASSERT(orig_off >= align_off);
2002 ASSERT(orig_end <= align_off + align_alen);
2003 }
2004
2005#ifdef DEBUG
2006 if (!eof && gotp->br_startoff != NULLFILEOFF)
2007 ASSERT(align_off + align_alen <= gotp->br_startoff);
2008 if (prevp->br_startoff != NULLFILEOFF)
2009 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
2010#endif
2011
2012 *lenp = align_alen;
2013 *offp = align_off;
2014 return 0;
2015}
2016
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017#define XFS_ALLOC_GAP_UNITS 4
2018
David Chinnerc2b1cba2008-04-10 12:21:40 +10002019STATIC void
Nathan Scotta365bdd2006-03-14 13:34:16 +11002020xfs_bmap_adjacent(
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2022{
2023 xfs_fsblock_t adjust; /* adjustment to block numbers */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
2025 xfs_mount_t *mp; /* mount point structure */
2026 int nullfb; /* true if ap->firstblock isn't set */
2027 int rt; /* true if inode is realtime */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
2029#define ISVALID(x,y) \
2030 (rt ? \
2031 (x) < mp->m_sb.sb_rblocks : \
2032 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
2033 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
2034 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
2035
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 mp = ap->ip->i_mount;
Dave Chinner0937e0f2011-09-18 20:40:57 +00002037 nullfb = *ap->firstblock == NULLFSBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
Dave Chinner0937e0f2011-09-18 20:40:57 +00002039 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 /*
2041 * If allocating at eof, and there's a previous real block,
Malcolm Parsons9da096f2009-03-29 09:55:42 +02002042 * try to use its last block as our starting point.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002044 if (ap->eof && ap->prev.br_startoff != NULLFILEOFF &&
2045 !isnullstartblock(ap->prev.br_startblock) &&
2046 ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount,
2047 ap->prev.br_startblock)) {
Dave Chinner3a756672011-09-18 20:40:58 +00002048 ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 /*
2050 * Adjust for the gap between prevp and us.
2051 */
Dave Chinner3a756672011-09-18 20:40:58 +00002052 adjust = ap->offset -
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002053 (ap->prev.br_startoff + ap->prev.br_blockcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 if (adjust &&
Dave Chinner3a756672011-09-18 20:40:58 +00002055 ISVALID(ap->blkno + adjust, ap->prev.br_startblock))
2056 ap->blkno += adjust;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 }
2058 /*
2059 * If not at eof, then compare the two neighbor blocks.
2060 * Figure out whether either one gives us a good starting point,
2061 * and pick the better one.
2062 */
2063 else if (!ap->eof) {
2064 xfs_fsblock_t gotbno; /* right side block number */
2065 xfs_fsblock_t gotdiff=0; /* right side difference */
2066 xfs_fsblock_t prevbno; /* left side block number */
2067 xfs_fsblock_t prevdiff=0; /* left side difference */
2068
2069 /*
2070 * If there's a previous (left) block, select a requested
2071 * start block based on it.
2072 */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002073 if (ap->prev.br_startoff != NULLFILEOFF &&
2074 !isnullstartblock(ap->prev.br_startblock) &&
2075 (prevbno = ap->prev.br_startblock +
2076 ap->prev.br_blockcount) &&
2077 ISVALID(prevbno, ap->prev.br_startblock)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 /*
2079 * Calculate gap to end of previous block.
2080 */
Dave Chinner3a756672011-09-18 20:40:58 +00002081 adjust = prevdiff = ap->offset -
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002082 (ap->prev.br_startoff +
2083 ap->prev.br_blockcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 /*
2085 * Figure the startblock based on the previous block's
2086 * end and the gap size.
2087 * Heuristic!
2088 * If the gap is large relative to the piece we're
2089 * allocating, or using it gives us an invalid block
2090 * number, then just use the end of the previous block.
2091 */
Dave Chinner3a756672011-09-18 20:40:58 +00002092 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 ISVALID(prevbno + prevdiff,
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002094 ap->prev.br_startblock))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 prevbno += adjust;
2096 else
2097 prevdiff += adjust;
2098 /*
2099 * If the firstblock forbids it, can't use it,
2100 * must use default.
2101 */
2102 if (!rt && !nullfb &&
2103 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
2104 prevbno = NULLFSBLOCK;
2105 }
2106 /*
2107 * No previous block or can't follow it, just default.
2108 */
2109 else
2110 prevbno = NULLFSBLOCK;
2111 /*
2112 * If there's a following (right) block, select a requested
2113 * start block based on it.
2114 */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002115 if (!isnullstartblock(ap->got.br_startblock)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 /*
2117 * Calculate gap to start of next block.
2118 */
Dave Chinner3a756672011-09-18 20:40:58 +00002119 adjust = gotdiff = ap->got.br_startoff - ap->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 /*
2121 * Figure the startblock based on the next block's
2122 * start and the gap size.
2123 */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002124 gotbno = ap->got.br_startblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 /*
2126 * Heuristic!
2127 * If the gap is large relative to the piece we're
2128 * allocating, or using it gives us an invalid block
2129 * number, then just use the start of the next block
2130 * offset by our length.
2131 */
Dave Chinner3a756672011-09-18 20:40:58 +00002132 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 ISVALID(gotbno - gotdiff, gotbno))
2134 gotbno -= adjust;
Dave Chinner3a756672011-09-18 20:40:58 +00002135 else if (ISVALID(gotbno - ap->length, gotbno)) {
2136 gotbno -= ap->length;
2137 gotdiff += adjust - ap->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 } else
2139 gotdiff += adjust;
2140 /*
2141 * If the firstblock forbids it, can't use it,
2142 * must use default.
2143 */
2144 if (!rt && !nullfb &&
2145 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
2146 gotbno = NULLFSBLOCK;
2147 }
2148 /*
2149 * No next block, just default.
2150 */
2151 else
2152 gotbno = NULLFSBLOCK;
2153 /*
2154 * If both valid, pick the better one, else the only good
Dave Chinner3a756672011-09-18 20:40:58 +00002155 * one, else ap->blkno is already set (to 0 or the inode block).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 */
2157 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
Dave Chinner3a756672011-09-18 20:40:58 +00002158 ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 else if (prevbno != NULLFSBLOCK)
Dave Chinner3a756672011-09-18 20:40:58 +00002160 ap->blkno = prevbno;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 else if (gotbno != NULLFSBLOCK)
Dave Chinner3a756672011-09-18 20:40:58 +00002162 ap->blkno = gotbno;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 }
Nathan Scotta365bdd2006-03-14 13:34:16 +11002164#undef ISVALID
Nathan Scotta365bdd2006-03-14 13:34:16 +11002165}
2166
2167STATIC int
2168xfs_bmap_rtalloc(
2169 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2170{
2171 xfs_alloctype_t atype = 0; /* type for allocation routines */
2172 int error; /* error return value */
2173 xfs_mount_t *mp; /* mount point structure */
2174 xfs_extlen_t prod = 0; /* product factor for allocators */
2175 xfs_extlen_t ralen = 0; /* realtime allocation length */
2176 xfs_extlen_t align; /* minimum allocation alignment */
Nathan Scotta365bdd2006-03-14 13:34:16 +11002177 xfs_rtblock_t rtb;
2178
2179 mp = ap->ip->i_mount;
David Chinner957d0eb2007-06-18 16:50:37 +10002180 align = xfs_get_extsz_hint(ap->ip);
Nathan Scotta365bdd2006-03-14 13:34:16 +11002181 prod = align / mp->m_sb.sb_rextsize;
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002182 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002183 align, 1, ap->eof, 0,
Dave Chinner3a756672011-09-18 20:40:58 +00002184 ap->conv, &ap->offset, &ap->length);
Nathan Scotta365bdd2006-03-14 13:34:16 +11002185 if (error)
2186 return error;
Dave Chinner3a756672011-09-18 20:40:58 +00002187 ASSERT(ap->length);
2188 ASSERT(ap->length % mp->m_sb.sb_rextsize == 0);
Nathan Scotta365bdd2006-03-14 13:34:16 +11002189
2190 /*
2191 * If the offset & length are not perfectly aligned
2192 * then kill prod, it will just get us in trouble.
2193 */
Dave Chinner3a756672011-09-18 20:40:58 +00002194 if (do_mod(ap->offset, align) || ap->length % align)
Nathan Scotta365bdd2006-03-14 13:34:16 +11002195 prod = 1;
2196 /*
2197 * Set ralen to be the actual requested length in rtextents.
2198 */
Dave Chinner3a756672011-09-18 20:40:58 +00002199 ralen = ap->length / mp->m_sb.sb_rextsize;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002200 /*
2201 * If the old value was close enough to MAXEXTLEN that
2202 * we rounded up to it, cut it back so it's valid again.
2203 * Note that if it's a really large request (bigger than
2204 * MAXEXTLEN), we don't hear about that number, and can't
2205 * adjust the starting point to match it.
2206 */
2207 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
2208 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
Christoph Hellwig04e99452011-01-25 09:06:19 +00002209
2210 /*
2211 * Lock out other modifications to the RT bitmap inode.
2212 */
Christoph Hellwig1050c712011-02-13 13:25:31 +00002213 xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
Christoph Hellwigddc34152011-09-19 15:00:54 +00002214 xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
Christoph Hellwig04e99452011-01-25 09:06:19 +00002215
Nathan Scotta365bdd2006-03-14 13:34:16 +11002216 /*
2217 * If it's an allocation to an empty file at offset 0,
2218 * pick an extent that will space things out in the rt area.
2219 */
Dave Chinner3a756672011-09-18 20:40:58 +00002220 if (ap->eof && ap->offset == 0) {
Andrew Morton0892ccd2007-06-28 16:46:56 +10002221 xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */
2222
Nathan Scotta365bdd2006-03-14 13:34:16 +11002223 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
2224 if (error)
2225 return error;
Dave Chinner3a756672011-09-18 20:40:58 +00002226 ap->blkno = rtx * mp->m_sb.sb_rextsize;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002227 } else {
Dave Chinner3a756672011-09-18 20:40:58 +00002228 ap->blkno = 0;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002229 }
2230
2231 xfs_bmap_adjacent(ap);
2232
2233 /*
2234 * Realtime allocation, done through xfs_rtallocate_extent.
2235 */
Dave Chinner3a756672011-09-18 20:40:58 +00002236 atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
2237 do_div(ap->blkno, mp->m_sb.sb_rextsize);
2238 rtb = ap->blkno;
2239 ap->length = ralen;
2240 if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002241 &ralen, atype, ap->wasdel, prod, &rtb)))
2242 return error;
2243 if (rtb == NULLFSBLOCK && prod > 1 &&
Dave Chinner3a756672011-09-18 20:40:58 +00002244 (error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1,
2245 ap->length, &ralen, atype,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002246 ap->wasdel, 1, &rtb)))
2247 return error;
Dave Chinner3a756672011-09-18 20:40:58 +00002248 ap->blkno = rtb;
2249 if (ap->blkno != NULLFSBLOCK) {
2250 ap->blkno *= mp->m_sb.sb_rextsize;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002251 ralen *= mp->m_sb.sb_rextsize;
Dave Chinner3a756672011-09-18 20:40:58 +00002252 ap->length = ralen;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002253 ap->ip->i_d.di_nblocks += ralen;
2254 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2255 if (ap->wasdel)
2256 ap->ip->i_delayed_blks -= ralen;
2257 /*
2258 * Adjust the disk quota also. This was reserved
2259 * earlier.
2260 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02002261 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002262 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
2263 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
2264 } else {
Dave Chinner3a756672011-09-18 20:40:58 +00002265 ap->length = 0;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002266 }
2267 return 0;
2268}
2269
2270STATIC int
Christoph Hellwigc467c042010-02-15 23:34:42 +00002271xfs_bmap_btalloc_nullfb(
2272 struct xfs_bmalloca *ap,
2273 struct xfs_alloc_arg *args,
2274 xfs_extlen_t *blen)
2275{
2276 struct xfs_mount *mp = ap->ip->i_mount;
2277 struct xfs_perag *pag;
2278 xfs_agnumber_t ag, startag;
2279 int notinit = 0;
2280 int error;
2281
2282 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
2283 args->type = XFS_ALLOCTYPE_NEAR_BNO;
2284 else
2285 args->type = XFS_ALLOCTYPE_START_BNO;
2286 args->total = ap->total;
2287
2288 /*
2289 * Search for an allocation group with a single extent large enough
2290 * for the request. If one isn't found, then adjust the minimum
2291 * allocation size to the largest space found.
2292 */
2293 startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno);
2294 if (startag == NULLAGNUMBER)
2295 startag = ag = 0;
2296
2297 pag = xfs_perag_get(mp, ag);
Dave Chinner14b064c2011-01-27 12:16:28 +11002298 while (*blen < args->maxlen) {
Christoph Hellwigc467c042010-02-15 23:34:42 +00002299 if (!pag->pagf_init) {
2300 error = xfs_alloc_pagf_init(mp, args->tp, ag,
2301 XFS_ALLOC_FLAG_TRYLOCK);
2302 if (error) {
2303 xfs_perag_put(pag);
2304 return error;
2305 }
2306 }
2307
2308 /*
2309 * See xfs_alloc_fix_freelist...
2310 */
2311 if (pag->pagf_init) {
2312 xfs_extlen_t longest;
2313 longest = xfs_alloc_longest_free_extent(mp, pag);
2314 if (*blen < longest)
2315 *blen = longest;
2316 } else
2317 notinit = 1;
2318
2319 if (xfs_inode_is_filestream(ap->ip)) {
Dave Chinner14b064c2011-01-27 12:16:28 +11002320 if (*blen >= args->maxlen)
Christoph Hellwigc467c042010-02-15 23:34:42 +00002321 break;
2322
2323 if (ap->userdata) {
2324 /*
2325 * If startag is an invalid AG, we've
2326 * come here once before and
2327 * xfs_filestream_new_ag picked the
2328 * best currently available.
2329 *
2330 * Don't continue looping, since we
2331 * could loop forever.
2332 */
2333 if (startag == NULLAGNUMBER)
2334 break;
2335
2336 error = xfs_filestream_new_ag(ap, &ag);
2337 xfs_perag_put(pag);
2338 if (error)
2339 return error;
2340
2341 /* loop again to set 'blen'*/
2342 startag = NULLAGNUMBER;
2343 pag = xfs_perag_get(mp, ag);
2344 continue;
2345 }
2346 }
2347 if (++ag == mp->m_sb.sb_agcount)
2348 ag = 0;
2349 if (ag == startag)
2350 break;
2351 xfs_perag_put(pag);
2352 pag = xfs_perag_get(mp, ag);
2353 }
2354 xfs_perag_put(pag);
2355
2356 /*
2357 * Since the above loop did a BUF_TRYLOCK, it is
2358 * possible that there is space for this request.
2359 */
2360 if (notinit || *blen < ap->minlen)
2361 args->minlen = ap->minlen;
2362 /*
2363 * If the best seen length is less than the request
2364 * length, use the best as the minimum.
2365 */
Dave Chinner14b064c2011-01-27 12:16:28 +11002366 else if (*blen < args->maxlen)
Christoph Hellwigc467c042010-02-15 23:34:42 +00002367 args->minlen = *blen;
2368 /*
Dave Chinner14b064c2011-01-27 12:16:28 +11002369 * Otherwise we've seen an extent as big as maxlen,
Christoph Hellwigc467c042010-02-15 23:34:42 +00002370 * use that as the minimum.
2371 */
2372 else
Dave Chinner14b064c2011-01-27 12:16:28 +11002373 args->minlen = args->maxlen;
Christoph Hellwigc467c042010-02-15 23:34:42 +00002374
2375 /*
2376 * set the failure fallback case to look in the selected
2377 * AG as the stream may have moved.
2378 */
2379 if (xfs_inode_is_filestream(ap->ip))
Dave Chinner3a756672011-09-18 20:40:58 +00002380 ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
Christoph Hellwigc467c042010-02-15 23:34:42 +00002381
2382 return 0;
2383}
2384
2385STATIC int
Nathan Scotta365bdd2006-03-14 13:34:16 +11002386xfs_bmap_btalloc(
2387 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2388{
2389 xfs_mount_t *mp; /* mount point structure */
2390 xfs_alloctype_t atype = 0; /* type for allocation routines */
2391 xfs_extlen_t align; /* minimum allocation alignment */
Nathan Scotta365bdd2006-03-14 13:34:16 +11002392 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
Christoph Hellwigc467c042010-02-15 23:34:42 +00002393 xfs_agnumber_t ag;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002394 xfs_alloc_arg_t args;
2395 xfs_extlen_t blen;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002396 xfs_extlen_t nextminlen = 0;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002397 int nullfb; /* true if ap->firstblock isn't set */
2398 int isaligned;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002399 int tryagain;
2400 int error;
2401
Dave Chinnera99ebf42011-12-01 11:24:20 +00002402 ASSERT(ap->length);
2403
Nathan Scotta365bdd2006-03-14 13:34:16 +11002404 mp = ap->ip->i_mount;
David Chinner957d0eb2007-06-18 16:50:37 +10002405 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002406 if (unlikely(align)) {
Dave Chinnerbaf41a52011-09-18 20:40:56 +00002407 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002408 align, 0, ap->eof, 0, ap->conv,
Dave Chinner3a756672011-09-18 20:40:58 +00002409 &ap->offset, &ap->length);
Nathan Scotta365bdd2006-03-14 13:34:16 +11002410 ASSERT(!error);
Dave Chinner3a756672011-09-18 20:40:58 +00002411 ASSERT(ap->length);
Nathan Scotta365bdd2006-03-14 13:34:16 +11002412 }
Dave Chinner0937e0f2011-09-18 20:40:57 +00002413 nullfb = *ap->firstblock == NULLFSBLOCK;
2414 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
David Chinner2a82b8b2007-07-11 11:09:12 +10002415 if (nullfb) {
2416 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
2417 ag = xfs_filestream_lookup_ag(ap->ip);
2418 ag = (ag != NULLAGNUMBER) ? ag : 0;
Dave Chinner3a756672011-09-18 20:40:58 +00002419 ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0);
David Chinner2a82b8b2007-07-11 11:09:12 +10002420 } else {
Dave Chinner3a756672011-09-18 20:40:58 +00002421 ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
David Chinner2a82b8b2007-07-11 11:09:12 +10002422 }
2423 } else
Dave Chinner3a756672011-09-18 20:40:58 +00002424 ap->blkno = *ap->firstblock;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002425
2426 xfs_bmap_adjacent(ap);
2427
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428 /*
Dave Chinner3a756672011-09-18 20:40:58 +00002429 * If allowed, use ap->blkno; otherwise must use firstblock since
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 * it's in the right allocation group.
2431 */
Dave Chinner3a756672011-09-18 20:40:58 +00002432 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 ;
2434 else
Dave Chinner3a756672011-09-18 20:40:58 +00002435 ap->blkno = *ap->firstblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 * Normal allocation, done through xfs_alloc_vextent.
2438 */
Nathan Scotta365bdd2006-03-14 13:34:16 +11002439 tryagain = isaligned = 0;
Mark Tinguely408cc4e2012-09-20 13:16:45 -05002440 memset(&args, 0, sizeof(args));
Nathan Scotta365bdd2006-03-14 13:34:16 +11002441 args.tp = ap->tp;
2442 args.mp = mp;
Dave Chinner3a756672011-09-18 20:40:58 +00002443 args.fsbno = ap->blkno;
Dave Chinner14b064c2011-01-27 12:16:28 +11002444
2445 /* Trim the allocation back to the maximum an AG can fit. */
Dave Chinner3a756672011-09-18 20:40:58 +00002446 args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp));
Dave Chinner0937e0f2011-09-18 20:40:57 +00002447 args.firstblock = *ap->firstblock;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002448 blen = 0;
2449 if (nullfb) {
Christoph Hellwigc467c042010-02-15 23:34:42 +00002450 error = xfs_bmap_btalloc_nullfb(ap, &args, &blen);
2451 if (error)
2452 return error;
Dave Chinner0937e0f2011-09-18 20:40:57 +00002453 } else if (ap->flist->xbf_low) {
David Chinner2a82b8b2007-07-11 11:09:12 +10002454 if (xfs_inode_is_filestream(ap->ip))
2455 args.type = XFS_ALLOCTYPE_FIRST_AG;
2456 else
2457 args.type = XFS_ALLOCTYPE_START_BNO;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002458 args.total = args.minlen = ap->minlen;
2459 } else {
2460 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2461 args.total = ap->total;
2462 args.minlen = ap->minlen;
2463 }
David Chinner957d0eb2007-06-18 16:50:37 +10002464 /* apply extent size hints if obtained earlier */
2465 if (unlikely(align)) {
2466 args.prod = align;
Dave Chinner3a756672011-09-18 20:40:58 +00002467 if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod)))
Nathan Scotta365bdd2006-03-14 13:34:16 +11002468 args.mod = (xfs_extlen_t)(args.prod - args.mod);
Tim Shimmine6a4b372007-11-23 16:30:42 +11002469 } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) {
Nathan Scotta365bdd2006-03-14 13:34:16 +11002470 args.prod = 1;
2471 args.mod = 0;
2472 } else {
Tim Shimmine6a4b372007-11-23 16:30:42 +11002473 args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog;
Dave Chinner3a756672011-09-18 20:40:58 +00002474 if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod))))
Nathan Scotta365bdd2006-03-14 13:34:16 +11002475 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2476 }
2477 /*
2478 * If we are not low on available data blocks, and the
2479 * underlying logical volume manager is a stripe, and
2480 * the file offset is zero then try to allocate data
2481 * blocks on stripe unit boundary.
2482 * NOTE: ap->aeof is only set if the allocation length
2483 * is >= the stripe unit and the allocation offset is
2484 * at the end of file.
2485 */
Dave Chinner0937e0f2011-09-18 20:40:57 +00002486 if (!ap->flist->xbf_low && ap->aeof) {
Dave Chinner3a756672011-09-18 20:40:58 +00002487 if (!ap->offset) {
Nathan Scotta365bdd2006-03-14 13:34:16 +11002488 args.alignment = mp->m_dalign;
2489 atype = args.type;
2490 isaligned = 1;
2491 /*
2492 * Adjust for alignment
2493 */
Dave Chinner14b064c2011-01-27 12:16:28 +11002494 if (blen > args.alignment && blen <= args.maxlen)
Nathan Scotta365bdd2006-03-14 13:34:16 +11002495 args.minlen = blen - args.alignment;
2496 args.minalignslop = 0;
2497 } else {
2498 /*
2499 * First try an exact bno allocation.
2500 * If it fails then do a near or start bno
2501 * allocation with alignment turned on.
2502 */
2503 atype = args.type;
2504 tryagain = 1;
2505 args.type = XFS_ALLOCTYPE_THIS_BNO;
2506 args.alignment = 1;
2507 /*
2508 * Compute the minlen+alignment for the
2509 * next case. Set slop so that the value
2510 * of minlen+alignment+slop doesn't go up
2511 * between the calls.
2512 */
Dave Chinner14b064c2011-01-27 12:16:28 +11002513 if (blen > mp->m_dalign && blen <= args.maxlen)
Nathan Scotta365bdd2006-03-14 13:34:16 +11002514 nextminlen = blen - mp->m_dalign;
2515 else
2516 nextminlen = args.minlen;
2517 if (nextminlen + mp->m_dalign > args.minlen + 1)
2518 args.minalignslop =
2519 nextminlen + mp->m_dalign -
2520 args.minlen - 1;
2521 else
2522 args.minalignslop = 0;
2523 }
2524 } else {
2525 args.alignment = 1;
2526 args.minalignslop = 0;
2527 }
2528 args.minleft = ap->minleft;
2529 args.wasdel = ap->wasdel;
2530 args.isfl = 0;
2531 args.userdata = ap->userdata;
2532 if ((error = xfs_alloc_vextent(&args)))
2533 return error;
2534 if (tryagain && args.fsbno == NULLFSBLOCK) {
2535 /*
2536 * Exact allocation failed. Now try with alignment
2537 * turned on.
2538 */
2539 args.type = atype;
Dave Chinner3a756672011-09-18 20:40:58 +00002540 args.fsbno = ap->blkno;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002541 args.alignment = mp->m_dalign;
2542 args.minlen = nextminlen;
2543 args.minalignslop = 0;
2544 isaligned = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545 if ((error = xfs_alloc_vextent(&args)))
2546 return error;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002547 }
2548 if (isaligned && args.fsbno == NULLFSBLOCK) {
2549 /*
2550 * allocation failed, so turn off alignment and
2551 * try again.
2552 */
2553 args.type = atype;
Dave Chinner3a756672011-09-18 20:40:58 +00002554 args.fsbno = ap->blkno;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002555 args.alignment = 0;
2556 if ((error = xfs_alloc_vextent(&args)))
2557 return error;
2558 }
2559 if (args.fsbno == NULLFSBLOCK && nullfb &&
2560 args.minlen > ap->minlen) {
2561 args.minlen = ap->minlen;
2562 args.type = XFS_ALLOCTYPE_START_BNO;
Dave Chinner3a756672011-09-18 20:40:58 +00002563 args.fsbno = ap->blkno;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002564 if ((error = xfs_alloc_vextent(&args)))
2565 return error;
2566 }
2567 if (args.fsbno == NULLFSBLOCK && nullfb) {
2568 args.fsbno = 0;
2569 args.type = XFS_ALLOCTYPE_FIRST_AG;
2570 args.total = ap->minlen;
2571 args.minleft = 0;
2572 if ((error = xfs_alloc_vextent(&args)))
2573 return error;
Dave Chinner0937e0f2011-09-18 20:40:57 +00002574 ap->flist->xbf_low = 1;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002575 }
2576 if (args.fsbno != NULLFSBLOCK) {
Dave Chinner0937e0f2011-09-18 20:40:57 +00002577 /*
2578 * check the allocation happened at the same or higher AG than
2579 * the first block that was allocated.
2580 */
2581 ASSERT(*ap->firstblock == NULLFSBLOCK ||
2582 XFS_FSB_TO_AGNO(mp, *ap->firstblock) ==
2583 XFS_FSB_TO_AGNO(mp, args.fsbno) ||
2584 (ap->flist->xbf_low &&
2585 XFS_FSB_TO_AGNO(mp, *ap->firstblock) <
2586 XFS_FSB_TO_AGNO(mp, args.fsbno)));
2587
Dave Chinner3a756672011-09-18 20:40:58 +00002588 ap->blkno = args.fsbno;
Dave Chinner0937e0f2011-09-18 20:40:57 +00002589 if (*ap->firstblock == NULLFSBLOCK)
2590 *ap->firstblock = args.fsbno;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002591 ASSERT(nullfb || fb_agno == args.agno ||
Dave Chinner0937e0f2011-09-18 20:40:57 +00002592 (ap->flist->xbf_low && fb_agno < args.agno));
Dave Chinner3a756672011-09-18 20:40:58 +00002593 ap->length = args.len;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002594 ap->ip->i_d.di_nblocks += args.len;
2595 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2596 if (ap->wasdel)
2597 ap->ip->i_delayed_blks -= args.len;
2598 /*
2599 * Adjust the disk quota also. This was reserved
2600 * earlier.
2601 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02002602 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
Nathan Scotta365bdd2006-03-14 13:34:16 +11002603 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
2604 XFS_TRANS_DQ_BCOUNT,
2605 (long) args.len);
2606 } else {
Dave Chinner3a756672011-09-18 20:40:58 +00002607 ap->blkno = NULLFSBLOCK;
2608 ap->length = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609 }
2610 return 0;
Nathan Scotta365bdd2006-03-14 13:34:16 +11002611}
2612
2613/*
2614 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
2615 * It figures out where to ask the underlying allocator to put the new extent.
2616 */
2617STATIC int
2618xfs_bmap_alloc(
2619 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2620{
Eric Sandeen71ddabb2007-11-23 16:29:42 +11002621 if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata)
Nathan Scotta365bdd2006-03-14 13:34:16 +11002622 return xfs_bmap_rtalloc(ap);
2623 return xfs_bmap_btalloc(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624}
2625
2626/*
2627 * Transform a btree format file with only one leaf node, where the
2628 * extents list will fit in the inode, into an extents format file.
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11002629 * Since the file extents are already in-core, all we have to do is
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 * give up the space for the btree root and pitch the leaf block.
2631 */
2632STATIC int /* error */
2633xfs_bmap_btree_to_extents(
2634 xfs_trans_t *tp, /* transaction pointer */
2635 xfs_inode_t *ip, /* incore inode pointer */
2636 xfs_btree_cur_t *cur, /* btree cursor */
2637 int *logflagsp, /* inode logging flags */
2638 int whichfork) /* data or attr fork */
2639{
2640 /* REFERENCED */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11002641 struct xfs_btree_block *cblock;/* child btree block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642 xfs_fsblock_t cbno; /* child block number */
2643 xfs_buf_t *cbp; /* child block's buffer */
2644 int error; /* error return value */
2645 xfs_ifork_t *ifp; /* inode fork data */
2646 xfs_mount_t *mp; /* mount point structure */
Christoph Hellwig576039c2006-09-28 10:58:06 +10002647 __be64 *pp; /* ptr to block address */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11002648 struct xfs_btree_block *rblock;/* root btree block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649
Christoph Hellwig60197e82008-10-30 17:11:19 +11002650 mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651 ifp = XFS_IFORK_PTR(ip, whichfork);
2652 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
2653 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
2654 rblock = ifp->if_broot;
Christoph Hellwig16259e72005-11-02 15:11:25 +11002655 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
2656 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
Christoph Hellwig60197e82008-10-30 17:11:19 +11002657 ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
2658 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
Christoph Hellwig576039c2006-09-28 10:58:06 +10002659 cbno = be64_to_cpu(*pp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002660 *logflagsp = 0;
2661#ifdef DEBUG
Christoph Hellwig576039c2006-09-28 10:58:06 +10002662 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 return error;
2664#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665 if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
2666 XFS_BMAP_BTREE_REF)))
2667 return error;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11002668 cblock = XFS_BUF_TO_BLOCK(cbp);
2669 if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670 return error;
2671 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
2672 ip->i_d.di_nblocks--;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002673 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 xfs_trans_binval(tp, cbp);
2675 if (cur->bc_bufs[0] == cbp)
2676 cur->bc_bufs[0] = NULL;
2677 xfs_iroot_realloc(ip, -1, whichfork);
2678 ASSERT(ifp->if_broot == NULL);
2679 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
2680 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002681 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682 return 0;
2683}
2684
2685/*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11002686 * Called by xfs_bmapi to update file extent records and the btree
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 * after removing space (or undoing a delayed allocation).
2688 */
2689STATIC int /* error */
2690xfs_bmap_del_extent(
2691 xfs_inode_t *ip, /* incore inode pointer */
2692 xfs_trans_t *tp, /* current transaction pointer */
Christoph Hellwigec90c552011-05-23 08:52:53 +00002693 xfs_extnum_t *idx, /* extent number to update/delete */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 xfs_bmap_free_t *flist, /* list of extents to be freed */
2695 xfs_btree_cur_t *cur, /* if null, not a btree */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11002696 xfs_bmbt_irec_t *del, /* data to remove from extents */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697 int *logflagsp, /* inode logging flags */
Christoph Hellwig54893272011-05-11 15:04:03 +00002698 int whichfork) /* data or attr fork */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699{
2700 xfs_filblks_t da_new; /* new delay-alloc indirect blocks */
2701 xfs_filblks_t da_old; /* old delay-alloc indirect blocks */
2702 xfs_fsblock_t del_endblock=0; /* first block past del */
2703 xfs_fileoff_t del_endoff; /* first offset past del */
2704 int delay; /* current block is delayed allocated */
2705 int do_fx; /* free extent at end of routine */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10002706 xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 int error; /* error return value */
2708 int flags; /* inode logging flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 xfs_bmbt_irec_t got; /* current extent entry */
2710 xfs_fileoff_t got_endoff; /* first offset past got */
2711 int i; /* temp state */
2712 xfs_ifork_t *ifp; /* inode fork pointer */
2713 xfs_mount_t *mp; /* mount structure */
2714 xfs_filblks_t nblks; /* quota/sb block count */
2715 xfs_bmbt_irec_t new; /* new record to be inserted */
2716 /* REFERENCED */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717 uint qfield; /* quota field to update */
2718 xfs_filblks_t temp; /* for indirect length calculations */
2719 xfs_filblks_t temp2; /* for indirect length calculations */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00002720 int state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721
2722 XFS_STATS_INC(xs_del_exlist);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00002723
2724 if (whichfork == XFS_ATTR_FORK)
2725 state |= BMAP_ATTRFORK;
2726
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727 mp = ip->i_mount;
2728 ifp = XFS_IFORK_PTR(ip, whichfork);
Christoph Hellwigec90c552011-05-23 08:52:53 +00002729 ASSERT((*idx >= 0) && (*idx < ifp->if_bytes /
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11002730 (uint)sizeof(xfs_bmbt_rec_t)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 ASSERT(del->br_blockcount > 0);
Christoph Hellwigec90c552011-05-23 08:52:53 +00002732 ep = xfs_iext_get_ext(ifp, *idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733 xfs_bmbt_get_all(ep, &got);
2734 ASSERT(got.br_startoff <= del->br_startoff);
2735 del_endoff = del->br_startoff + del->br_blockcount;
2736 got_endoff = got.br_startoff + got.br_blockcount;
2737 ASSERT(got_endoff >= del_endoff);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002738 delay = isnullstartblock(got.br_startblock);
2739 ASSERT(isnullstartblock(del->br_startblock) == delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002740 flags = 0;
2741 qfield = 0;
2742 error = 0;
2743 /*
2744 * If deleting a real allocation, must free up the disk space.
2745 */
2746 if (!delay) {
2747 flags = XFS_ILOG_CORE;
2748 /*
2749 * Realtime allocation. Free it and record di_nblocks update.
2750 */
Eric Sandeen71ddabb2007-11-23 16:29:42 +11002751 if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 xfs_fsblock_t bno;
2753 xfs_filblks_t len;
2754
2755 ASSERT(do_mod(del->br_blockcount,
2756 mp->m_sb.sb_rextsize) == 0);
2757 ASSERT(do_mod(del->br_startblock,
2758 mp->m_sb.sb_rextsize) == 0);
2759 bno = del->br_startblock;
2760 len = del->br_blockcount;
2761 do_div(bno, mp->m_sb.sb_rextsize);
2762 do_div(len, mp->m_sb.sb_rextsize);
Christoph Hellwigf3ca87382011-07-08 14:34:47 +02002763 error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len);
2764 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002765 goto done;
2766 do_fx = 0;
2767 nblks = len * mp->m_sb.sb_rextsize;
2768 qfield = XFS_TRANS_DQ_RTBCOUNT;
2769 }
2770 /*
2771 * Ordinary allocation.
2772 */
2773 else {
2774 do_fx = 1;
2775 nblks = del->br_blockcount;
2776 qfield = XFS_TRANS_DQ_BCOUNT;
2777 }
2778 /*
2779 * Set up del_endblock and cur for later.
2780 */
2781 del_endblock = del->br_startblock + del->br_blockcount;
2782 if (cur) {
2783 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
2784 got.br_startblock, got.br_blockcount,
2785 &i)))
2786 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10002787 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788 }
2789 da_old = da_new = 0;
2790 } else {
Eric Sandeen9d87c312009-01-14 23:22:07 -06002791 da_old = startblockval(got.br_startblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792 da_new = 0;
2793 nblks = 0;
2794 do_fx = 0;
2795 }
2796 /*
2797 * Set flag value to use in switch statement.
2798 * Left-contig is 2, right-contig is 1.
2799 */
2800 switch (((got.br_startoff == del->br_startoff) << 1) |
2801 (got_endoff == del_endoff)) {
2802 case 3:
2803 /*
2804 * Matches the whole extent. Delete the entry.
2805 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00002806 xfs_iext_remove(ip, *idx, 1,
Christoph Hellwig6ef35542009-11-25 00:00:21 +00002807 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
Christoph Hellwig233eebb2011-05-11 15:04:05 +00002808 --*idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809 if (delay)
2810 break;
Christoph Hellwig233eebb2011-05-11 15:04:05 +00002811
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 XFS_IFORK_NEXT_SET(ip, whichfork,
2813 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
2814 flags |= XFS_ILOG_CORE;
2815 if (!cur) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06002816 flags |= xfs_ilog_fext(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002817 break;
2818 }
Christoph Hellwig91cca5df2008-10-30 16:58:01 +11002819 if ((error = xfs_btree_delete(cur, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002820 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10002821 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002822 break;
2823
2824 case 2:
2825 /*
2826 * Deleting the first part of the extent.
2827 */
Christoph Hellwigec90c552011-05-23 08:52:53 +00002828 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 xfs_bmbt_set_startoff(ep, del_endoff);
2830 temp = got.br_blockcount - del->br_blockcount;
2831 xfs_bmbt_set_blockcount(ep, temp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832 if (delay) {
2833 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2834 da_old);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002835 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
Christoph Hellwigec90c552011-05-23 08:52:53 +00002836 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837 da_new = temp;
2838 break;
2839 }
2840 xfs_bmbt_set_startblock(ep, del_endblock);
Christoph Hellwigec90c552011-05-23 08:52:53 +00002841 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002842 if (!cur) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06002843 flags |= xfs_ilog_fext(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 break;
2845 }
2846 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
2847 got.br_blockcount - del->br_blockcount,
2848 got.br_state)))
2849 goto done;
2850 break;
2851
2852 case 1:
2853 /*
2854 * Deleting the last part of the extent.
2855 */
2856 temp = got.br_blockcount - del->br_blockcount;
Christoph Hellwigec90c552011-05-23 08:52:53 +00002857 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 xfs_bmbt_set_blockcount(ep, temp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859 if (delay) {
2860 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2861 da_old);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002862 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
Christoph Hellwigec90c552011-05-23 08:52:53 +00002863 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 da_new = temp;
2865 break;
2866 }
Christoph Hellwigec90c552011-05-23 08:52:53 +00002867 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868 if (!cur) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06002869 flags |= xfs_ilog_fext(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870 break;
2871 }
2872 if ((error = xfs_bmbt_update(cur, got.br_startoff,
2873 got.br_startblock,
2874 got.br_blockcount - del->br_blockcount,
2875 got.br_state)))
2876 goto done;
2877 break;
2878
2879 case 0:
2880 /*
2881 * Deleting the middle of the extent.
2882 */
2883 temp = del->br_startoff - got.br_startoff;
Christoph Hellwigec90c552011-05-23 08:52:53 +00002884 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 xfs_bmbt_set_blockcount(ep, temp);
2886 new.br_startoff = del_endoff;
2887 temp2 = got_endoff - del_endoff;
2888 new.br_blockcount = temp2;
2889 new.br_state = got.br_state;
2890 if (!delay) {
2891 new.br_startblock = del_endblock;
2892 flags |= XFS_ILOG_CORE;
2893 if (cur) {
2894 if ((error = xfs_bmbt_update(cur,
2895 got.br_startoff,
2896 got.br_startblock, temp,
2897 got.br_state)))
2898 goto done;
Christoph Hellwig637aa502008-10-30 16:55:45 +11002899 if ((error = xfs_btree_increment(cur, 0, &i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900 goto done;
2901 cur->bc_rec.b = new;
Christoph Hellwig4b22a572008-10-30 16:57:40 +11002902 error = xfs_btree_insert(cur, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903 if (error && error != ENOSPC)
2904 goto done;
2905 /*
2906 * If get no-space back from btree insert,
2907 * it tried a split, and we have a zero
2908 * block reservation.
2909 * Fix up our state and return the error.
2910 */
2911 if (error == ENOSPC) {
2912 /*
2913 * Reset the cursor, don't trust
2914 * it after any insert operation.
2915 */
2916 if ((error = xfs_bmbt_lookup_eq(cur,
2917 got.br_startoff,
2918 got.br_startblock,
2919 temp, &i)))
2920 goto done;
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10002921 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922 /*
2923 * Update the btree record back
2924 * to the original value.
2925 */
2926 if ((error = xfs_bmbt_update(cur,
2927 got.br_startoff,
2928 got.br_startblock,
2929 got.br_blockcount,
2930 got.br_state)))
2931 goto done;
2932 /*
2933 * Reset the extent record back
2934 * to the original value.
2935 */
2936 xfs_bmbt_set_blockcount(ep,
2937 got.br_blockcount);
2938 flags = 0;
2939 error = XFS_ERROR(ENOSPC);
2940 goto done;
2941 }
Lachlan McIlroy6bd8fc82008-06-23 13:25:46 +10002942 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 } else
Eric Sandeen9d87c312009-01-14 23:22:07 -06002944 flags |= xfs_ilog_fext(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945 XFS_IFORK_NEXT_SET(ip, whichfork,
2946 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
2947 } else {
2948 ASSERT(whichfork == XFS_DATA_FORK);
2949 temp = xfs_bmap_worst_indlen(ip, temp);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002950 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002951 temp2 = xfs_bmap_worst_indlen(ip, temp2);
Eric Sandeen9d87c312009-01-14 23:22:07 -06002952 new.br_startblock = nullstartblock((int)temp2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 da_new = temp + temp2;
2954 while (da_new > da_old) {
2955 if (temp) {
2956 temp--;
2957 da_new--;
2958 xfs_bmbt_set_startblock(ep,
Eric Sandeen9d87c312009-01-14 23:22:07 -06002959 nullstartblock((int)temp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960 }
2961 if (da_new == da_old)
2962 break;
2963 if (temp2) {
2964 temp2--;
2965 da_new--;
2966 new.br_startblock =
Eric Sandeen9d87c312009-01-14 23:22:07 -06002967 nullstartblock((int)temp2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002968 }
2969 }
2970 }
Christoph Hellwigec90c552011-05-23 08:52:53 +00002971 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2972 xfs_iext_insert(ip, *idx + 1, 1, &new, state);
2973 ++*idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974 break;
2975 }
2976 /*
2977 * If we need to, add to list of extents to delete.
2978 */
2979 if (do_fx)
2980 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
2981 mp);
2982 /*
2983 * Adjust inode # blocks in the file.
2984 */
2985 if (nblks)
2986 ip->i_d.di_nblocks -= nblks;
2987 /*
2988 * Adjust quota data.
2989 */
2990 if (qfield)
Christoph Hellwig7d095252009-06-08 15:33:32 +02002991 xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002992
2993 /*
2994 * Account for change in delayed indirect blocks.
2995 * Nothing to do for disk quota accounting here.
2996 */
2997 ASSERT(da_old >= da_new);
Christoph Hellwig96540c72010-09-30 02:25:55 +00002998 if (da_old > da_new) {
2999 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
Christoph Hellwig54893272011-05-11 15:04:03 +00003000 (int64_t)(da_old - da_new), 0);
Christoph Hellwig96540c72010-09-30 02:25:55 +00003001 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002done:
3003 *logflagsp = flags;
3004 return error;
3005}
3006
3007/*
3008 * Remove the entry "free" from the free item list. Prev points to the
3009 * previous entry, unless "free" is the head of the list.
3010 */
3011STATIC void
3012xfs_bmap_del_free(
3013 xfs_bmap_free_t *flist, /* free item list header */
3014 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
3015 xfs_bmap_free_item_t *free) /* list item to be freed */
3016{
3017 if (prev)
3018 prev->xbfi_next = free->xbfi_next;
3019 else
3020 flist->xbf_first = free->xbfi_next;
3021 flist->xbf_count--;
3022 kmem_zone_free(xfs_bmap_free_item_zone, free);
3023}
3024
3025/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026 * Convert an extents-format file into a btree-format file.
3027 * The new file will have a root block (in the inode) and a single child block.
3028 */
3029STATIC int /* error */
3030xfs_bmap_extents_to_btree(
3031 xfs_trans_t *tp, /* transaction pointer */
3032 xfs_inode_t *ip, /* incore inode pointer */
3033 xfs_fsblock_t *firstblock, /* first-block-allocated */
3034 xfs_bmap_free_t *flist, /* blocks freed in xaction */
3035 xfs_btree_cur_t **curp, /* cursor returned to caller */
3036 int wasdel, /* converting a delayed alloc */
3037 int *logflagsp, /* inode logging flags */
3038 int whichfork) /* data or attr fork */
3039{
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003040 struct xfs_btree_block *ablock; /* allocated (child) bt block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041 xfs_buf_t *abp; /* buffer for ablock */
3042 xfs_alloc_arg_t args; /* allocation arguments */
3043 xfs_bmbt_rec_t *arp; /* child record pointer */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003044 struct xfs_btree_block *block; /* btree root block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003045 xfs_btree_cur_t *cur; /* bmap btree cursor */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003046 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003047 int error; /* error return value */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003048 xfs_extnum_t i, cnt; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049 xfs_ifork_t *ifp; /* inode fork pointer */
3050 xfs_bmbt_key_t *kp; /* root block key pointer */
3051 xfs_mount_t *mp; /* mount structure */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003052 xfs_extnum_t nextents; /* number of file extents */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003053 xfs_bmbt_ptr_t *pp; /* root block address pointer */
3054
3055 ifp = XFS_IFORK_PTR(ip, whichfork);
3056 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00003057
Linus Torvalds1da177e2005-04-16 15:20:36 -07003058 /*
3059 * Make space in the inode incore.
3060 */
3061 xfs_iroot_realloc(ip, 1, whichfork);
3062 ifp->if_flags |= XFS_IFBROOT;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003063
Linus Torvalds1da177e2005-04-16 15:20:36 -07003064 /*
3065 * Fill in the root.
3066 */
3067 block = ifp->if_broot;
Christoph Hellwig16259e72005-11-02 15:11:25 +11003068 block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3069 block->bb_level = cpu_to_be16(1);
3070 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003071 block->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3072 block->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3073
Linus Torvalds1da177e2005-04-16 15:20:36 -07003074 /*
3075 * Need a cursor. Can't allocate until bb_level is filled in.
3076 */
3077 mp = ip->i_mount;
Christoph Hellwig561f7d12008-10-30 16:53:59 +11003078 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079 cur->bc_private.b.firstblock = *firstblock;
3080 cur->bc_private.b.flist = flist;
3081 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
3082 /*
3083 * Convert to a btree with two levels, one record in root.
3084 */
3085 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
Mark Tinguely408cc4e2012-09-20 13:16:45 -05003086 memset(&args, 0, sizeof(args));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087 args.tp = tp;
3088 args.mp = mp;
Yingping Lud210a282006-06-09 14:55:18 +10003089 args.firstblock = *firstblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 if (*firstblock == NULLFSBLOCK) {
3091 args.type = XFS_ALLOCTYPE_START_BNO;
3092 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
3093 } else if (flist->xbf_low) {
3094 args.type = XFS_ALLOCTYPE_START_BNO;
3095 args.fsbno = *firstblock;
3096 } else {
3097 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3098 args.fsbno = *firstblock;
3099 }
3100 args.minlen = args.maxlen = args.prod = 1;
3101 args.total = args.minleft = args.alignment = args.mod = args.isfl =
3102 args.minalignslop = 0;
3103 args.wasdel = wasdel;
3104 *logflagsp = 0;
3105 if ((error = xfs_alloc_vextent(&args))) {
3106 xfs_iroot_realloc(ip, -1, whichfork);
3107 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
3108 return error;
3109 }
3110 /*
3111 * Allocation can't fail, the space was reserved.
3112 */
3113 ASSERT(args.fsbno != NULLFSBLOCK);
3114 ASSERT(*firstblock == NULLFSBLOCK ||
3115 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
3116 (flist->xbf_low &&
3117 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
3118 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
3119 cur->bc_private.b.allocated++;
3120 ip->i_d.di_nblocks++;
Christoph Hellwig7d095252009-06-08 15:33:32 +02003121 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
3123 /*
3124 * Fill in the child block.
3125 */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003126 ablock = XFS_BUF_TO_BLOCK(abp);
Christoph Hellwig16259e72005-11-02 15:11:25 +11003127 ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003128 ablock->bb_level = 0;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003129 ablock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3130 ablock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
Christoph Hellwig136341b2008-10-30 17:11:40 +11003131 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003133 for (cnt = i = 0; i < nextents; i++) {
3134 ep = xfs_iext_get_ext(ifp, i);
Eric Sandeen9d87c312009-01-14 23:22:07 -06003135 if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
Christoph Hellwigcd8b0a92007-08-16 16:24:15 +10003136 arp->l0 = cpu_to_be64(ep->l0);
3137 arp->l1 = cpu_to_be64(ep->l1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003138 arp++; cnt++;
3139 }
3140 }
Christoph Hellwig16259e72005-11-02 15:11:25 +11003141 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11003142 xfs_btree_set_numrecs(ablock, cnt);
3143
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144 /*
3145 * Fill in the root key and pointer.
3146 */
Christoph Hellwig136341b2008-10-30 17:11:40 +11003147 kp = XFS_BMBT_KEY_ADDR(mp, block, 1);
3148 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
Christoph Hellwig8801bb92006-09-28 10:58:17 +10003149 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
Christoph Hellwig136341b2008-10-30 17:11:40 +11003150 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur,
3151 be16_to_cpu(block->bb_level)));
Christoph Hellwig576039c2006-09-28 10:58:06 +10003152 *pp = cpu_to_be64(args.fsbno);
Christoph Hellwig136341b2008-10-30 17:11:40 +11003153
Linus Torvalds1da177e2005-04-16 15:20:36 -07003154 /*
3155 * Do all this logging at the end so that
3156 * the root is at the right level.
3157 */
Christoph Hellwigfd6bcc5b2008-10-30 16:58:21 +11003158 xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS);
3159 xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 ASSERT(*curp == NULL);
3161 *curp = cur;
Eric Sandeen9d87c312009-01-14 23:22:07 -06003162 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003163 return 0;
3164}
3165
3166/*
Christoph Hellwig1a5902c2009-03-29 19:26:46 +02003167 * Calculate the default attribute fork offset for newly created inodes.
3168 */
3169uint
3170xfs_default_attroffset(
3171 struct xfs_inode *ip)
3172{
3173 struct xfs_mount *mp = ip->i_mount;
3174 uint offset;
3175
3176 if (mp->m_sb.sb_inodesize == 256) {
3177 offset = XFS_LITINO(mp) -
3178 XFS_BMDR_SPACE_CALC(MINABTPTRS);
3179 } else {
3180 offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
3181 }
3182
3183 ASSERT(offset < XFS_LITINO(mp));
3184 return offset;
3185}
3186
3187/*
Nathan Scottd8cc8902005-11-02 10:34:53 +11003188 * Helper routine to reset inode di_forkoff field when switching
3189 * attribute fork from local to extent format - we reset it where
3190 * possible to make space available for inline data fork extents.
3191 */
3192STATIC void
3193xfs_bmap_forkoff_reset(
3194 xfs_mount_t *mp,
3195 xfs_inode_t *ip,
3196 int whichfork)
3197{
3198 if (whichfork == XFS_ATTR_FORK &&
Christoph Hellwig1a5902c2009-03-29 19:26:46 +02003199 ip->i_d.di_format != XFS_DINODE_FMT_DEV &&
3200 ip->i_d.di_format != XFS_DINODE_FMT_UUID &&
3201 ip->i_d.di_format != XFS_DINODE_FMT_BTREE) {
3202 uint dfl_forkoff = xfs_default_attroffset(ip) >> 3;
3203
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00003204 if (dfl_forkoff > ip->i_d.di_forkoff)
Christoph Hellwig1a5902c2009-03-29 19:26:46 +02003205 ip->i_d.di_forkoff = dfl_forkoff;
Nathan Scottd8cc8902005-11-02 10:34:53 +11003206 }
3207}
3208
3209/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210 * Convert a local file to an extents file.
3211 * This code is out of bounds for data forks of regular files,
3212 * since the file data needs to get logged so things will stay consistent.
3213 * (The bmap-level manipulations are ok, though).
3214 */
3215STATIC int /* error */
3216xfs_bmap_local_to_extents(
3217 xfs_trans_t *tp, /* transaction pointer */
3218 xfs_inode_t *ip, /* incore inode pointer */
3219 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
3220 xfs_extlen_t total, /* total blocks needed by transaction */
3221 int *logflagsp, /* inode logging flags */
3222 int whichfork) /* data or attr fork */
3223{
3224 int error; /* error return value */
3225 int flags; /* logging flags returned */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226 xfs_ifork_t *ifp; /* inode fork pointer */
3227
3228 /*
3229 * We don't want to deal with the case of keeping inode data inline yet.
3230 * So sending the data fork of a regular inode is invalid.
3231 */
Al Viroabbede12011-07-26 02:31:30 -04003232 ASSERT(!(S_ISREG(ip->i_d.di_mode) && whichfork == XFS_DATA_FORK));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233 ifp = XFS_IFORK_PTR(ip, whichfork);
3234 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3235 flags = 0;
3236 error = 0;
3237 if (ifp->if_bytes) {
3238 xfs_alloc_arg_t args; /* allocation arguments */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003239 xfs_buf_t *bp; /* buffer for extent block */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003240 xfs_bmbt_rec_host_t *ep;/* extent record pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241
Mark Tinguely408cc4e2012-09-20 13:16:45 -05003242 memset(&args, 0, sizeof(args));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243 args.tp = tp;
3244 args.mp = ip->i_mount;
Yingping Lud210a282006-06-09 14:55:18 +10003245 args.firstblock = *firstblock;
Mandy Kirkconnellf020b672006-03-14 14:07:24 +11003246 ASSERT((ifp->if_flags &
3247 (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003248 /*
3249 * Allocate a block. We know we need only one, since the
3250 * file currently fits in an inode.
3251 */
3252 if (*firstblock == NULLFSBLOCK) {
3253 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
3254 args.type = XFS_ALLOCTYPE_START_BNO;
3255 } else {
3256 args.fsbno = *firstblock;
3257 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3258 }
3259 args.total = total;
3260 args.mod = args.minleft = args.alignment = args.wasdel =
3261 args.isfl = args.minalignslop = 0;
3262 args.minlen = args.maxlen = args.prod = 1;
3263 if ((error = xfs_alloc_vextent(&args)))
3264 goto done;
3265 /*
3266 * Can't fail, the space was reserved.
3267 */
3268 ASSERT(args.fsbno != NULLFSBLOCK);
3269 ASSERT(args.len == 1);
3270 *firstblock = args.fsbno;
3271 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
Chandra Seetharaman62926042011-07-22 23:40:15 +00003272 memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003273 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003274 xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003276 xfs_iext_add(ifp, 0, 1);
3277 ep = xfs_iext_get_ext(ifp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003278 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00003279 trace_xfs_bmap_post_update(ip, 0,
3280 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0,
3281 _THIS_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
3283 ip->i_d.di_nblocks = 1;
Christoph Hellwig7d095252009-06-08 15:33:32 +02003284 xfs_trans_mod_dquot_byino(tp, ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003285 XFS_TRANS_DQ_BCOUNT, 1L);
Eric Sandeen9d87c312009-01-14 23:22:07 -06003286 flags |= xfs_ilog_fext(whichfork);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003287 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003289 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
3290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003291 ifp->if_flags &= ~XFS_IFINLINE;
3292 ifp->if_flags |= XFS_IFEXTENTS;
3293 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3294 flags |= XFS_ILOG_CORE;
3295done:
3296 *logflagsp = flags;
3297 return error;
3298}
3299
Linus Torvalds1da177e2005-04-16 15:20:36 -07003300/*
Mandy Kirkconnell8867bc92006-03-17 17:25:04 +11003301 * Search the extent records for the entry containing block bno.
3302 * If bno lies in a hole, point to the next entry. If bno lies
3303 * past eof, *eofp will be set, and *prevp will contain the last
3304 * entry (null if none). Else, *lastxp will be set to the index
3305 * of the found entry; *gotp will contain the entry.
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003306 */
Eric Sandeend96f8f82009-07-02 00:09:33 -05003307STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003308xfs_bmap_search_multi_extents(
3309 xfs_ifork_t *ifp, /* inode fork pointer */
3310 xfs_fileoff_t bno, /* block number searched for */
3311 int *eofp, /* out: end of file found */
3312 xfs_extnum_t *lastxp, /* out: last extent index */
3313 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3314 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3315{
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003316 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003317 xfs_extnum_t lastx; /* last extent index */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003318
3319 /*
Mandy Kirkconnell8867bc92006-03-17 17:25:04 +11003320 * Initialize the extent entry structure to catch access to
3321 * uninitialized br_startblock field.
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003322 */
Mandy Kirkconnell8867bc92006-03-17 17:25:04 +11003323 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
3324 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
3325 gotp->br_state = XFS_EXT_INVALID;
3326#if XFS_BIG_BLKNOS
3327 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
3328#else
3329 gotp->br_startblock = 0xffffa5a5;
3330#endif
3331 prevp->br_startoff = NULLFILEOFF;
3332
3333 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
3334 if (lastx > 0) {
3335 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
3336 }
3337 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
3338 xfs_bmbt_get_all(ep, gotp);
3339 *eofp = 0;
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003340 } else {
Mandy Kirkconnell8867bc92006-03-17 17:25:04 +11003341 if (lastx > 0) {
3342 *gotp = *prevp;
3343 }
3344 *eofp = 1;
3345 ep = NULL;
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003346 }
Mandy Kirkconnell8867bc92006-03-17 17:25:04 +11003347 *lastxp = lastx;
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003348 return ep;
3349}
3350
3351/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003352 * Search the extents list for the inode, for the extent containing bno.
3353 * If bno lies in a hole, point to the next entry. If bno lies past eof,
3354 * *eofp will be set, and *prevp will contain the last entry (null if none).
3355 * Else, *lastxp will be set to the index of the found
3356 * entry; *gotp will contain the entry.
3357 */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003358STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359xfs_bmap_search_extents(
3360 xfs_inode_t *ip, /* incore inode pointer */
3361 xfs_fileoff_t bno, /* block number searched for */
Nathan Scott572d95f2006-09-28 11:03:20 +10003362 int fork, /* data or attr fork */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 int *eofp, /* out: end of file found */
3364 xfs_extnum_t *lastxp, /* out: last extent index */
3365 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3366 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3367{
3368 xfs_ifork_t *ifp; /* inode fork pointer */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003369 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003370
3371 XFS_STATS_INC(xs_look_exlist);
Nathan Scott572d95f2006-09-28 11:03:20 +10003372 ifp = XFS_IFORK_PTR(ip, fork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +11003374 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
3375
Nathan Scott572d95f2006-09-28 11:03:20 +10003376 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
3377 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
Dave Chinner6a19d932011-03-07 10:02:35 +11003378 xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
Nathan Scott572d95f2006-09-28 11:03:20 +10003379 "Access to block zero in inode %llu "
3380 "start_block: %llx start_off: %llx "
3381 "blkcnt: %llx extent-state: %x lastx: %x\n",
3382 (unsigned long long)ip->i_ino,
Nathan Scott3ddb8fa2006-01-11 15:33:02 +11003383 (unsigned long long)gotp->br_startblock,
3384 (unsigned long long)gotp->br_startoff,
3385 (unsigned long long)gotp->br_blockcount,
Nathan Scott572d95f2006-09-28 11:03:20 +10003386 gotp->br_state, *lastxp);
3387 *lastxp = NULLEXTNUM;
3388 *eofp = 1;
3389 return NULL;
3390 }
3391 return ep;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392}
3393
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394/*
3395 * Compute the worst-case number of indirect blocks that will be used
3396 * for ip's delayed extent of length "len".
3397 */
3398STATIC xfs_filblks_t
3399xfs_bmap_worst_indlen(
3400 xfs_inode_t *ip, /* incore inode pointer */
3401 xfs_filblks_t len) /* delayed extent length */
3402{
3403 int level; /* btree level number */
3404 int maxrecs; /* maximum record count at this level */
3405 xfs_mount_t *mp; /* mount structure */
3406 xfs_filblks_t rval; /* return value */
3407
3408 mp = ip->i_mount;
3409 maxrecs = mp->m_bmap_dmxr[0];
3410 for (level = 0, rval = 0;
3411 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
3412 level++) {
3413 len += maxrecs - 1;
3414 do_div(len, maxrecs);
3415 rval += len;
3416 if (len == 1)
3417 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
3418 level - 1;
3419 if (level == 0)
3420 maxrecs = mp->m_bmap_dmxr[1];
3421 }
3422 return rval;
3423}
3424
Linus Torvalds1da177e2005-04-16 15:20:36 -07003425/*
3426 * Convert inode from non-attributed to attributed.
3427 * Must not be in a transaction, ip must not be locked.
3428 */
3429int /* error code */
3430xfs_bmap_add_attrfork(
3431 xfs_inode_t *ip, /* incore inode pointer */
Nathan Scottd8cc8902005-11-02 10:34:53 +11003432 int size, /* space new attribute needs */
3433 int rsvd) /* xact may use reserved blks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003434{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003435 xfs_fsblock_t firstblock; /* 1st block/ag allocated */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003436 xfs_bmap_free_t flist; /* freed extent records */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437 xfs_mount_t *mp; /* mount structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438 xfs_trans_t *tp; /* transaction pointer */
Nathan Scottd8cc8902005-11-02 10:34:53 +11003439 int blks; /* space reservation */
3440 int version = 1; /* superblock attr version */
3441 int committed; /* xaction was committed */
3442 int logflags; /* logging flags */
3443 int error; /* error return value */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444
Nathan Scottd8cc8902005-11-02 10:34:53 +11003445 ASSERT(XFS_IFORK_Q(ip) == 0);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003446
Linus Torvalds1da177e2005-04-16 15:20:36 -07003447 mp = ip->i_mount;
3448 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
3449 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
3450 blks = XFS_ADDAFORK_SPACE_RES(mp);
3451 if (rsvd)
3452 tp->t_flags |= XFS_TRANS_RESERVE;
3453 if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
3454 XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
3455 goto error0;
3456 xfs_ilock(ip, XFS_ILOCK_EXCL);
Christoph Hellwig7d095252009-06-08 15:33:32 +02003457 error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
3459 XFS_QMOPT_RES_REGBLKS);
3460 if (error) {
3461 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3462 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
3463 return error;
3464 }
3465 if (XFS_IFORK_Q(ip))
3466 goto error1;
3467 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
3468 /*
3469 * For inodes coming from pre-6.2 filesystems.
3470 */
3471 ASSERT(ip->i_d.di_aformat == 0);
3472 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
3473 }
3474 ASSERT(ip->i_d.di_anextents == 0);
Christoph Hellwig898621d2010-06-24 11:36:58 +10003475
Christoph Hellwigddc34152011-09-19 15:00:54 +00003476 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig898621d2010-06-24 11:36:58 +10003478
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479 switch (ip->i_d.di_format) {
3480 case XFS_DINODE_FMT_DEV:
3481 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
3482 break;
3483 case XFS_DINODE_FMT_UUID:
3484 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
3485 break;
3486 case XFS_DINODE_FMT_LOCAL:
3487 case XFS_DINODE_FMT_EXTENTS:
3488 case XFS_DINODE_FMT_BTREE:
Nathan Scottd8cc8902005-11-02 10:34:53 +11003489 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
3490 if (!ip->i_d.di_forkoff)
Christoph Hellwig1a5902c2009-03-29 19:26:46 +02003491 ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
Nathan Scott13059ff2006-01-11 15:32:01 +11003492 else if (mp->m_flags & XFS_MOUNT_ATTR2)
Nathan Scottd8cc8902005-11-02 10:34:53 +11003493 version = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003494 break;
3495 default:
3496 ASSERT(0);
3497 error = XFS_ERROR(EINVAL);
3498 goto error1;
3499 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00003500
Linus Torvalds1da177e2005-04-16 15:20:36 -07003501 ASSERT(ip->i_afp == NULL);
3502 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003503 ip->i_afp->if_flags = XFS_IFEXTENTS;
3504 logflags = 0;
Eric Sandeen9d87c312009-01-14 23:22:07 -06003505 xfs_bmap_init(&flist, &firstblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003506 switch (ip->i_d.di_format) {
3507 case XFS_DINODE_FMT_LOCAL:
3508 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
3509 &logflags);
3510 break;
3511 case XFS_DINODE_FMT_EXTENTS:
3512 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
3513 &flist, &logflags);
3514 break;
3515 case XFS_DINODE_FMT_BTREE:
3516 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
3517 &logflags);
3518 break;
3519 default:
3520 error = 0;
3521 break;
3522 }
3523 if (logflags)
3524 xfs_trans_log_inode(tp, ip, logflags);
3525 if (error)
3526 goto error2;
Eric Sandeen62118702008-03-06 13:44:28 +11003527 if (!xfs_sb_version_hasattr(&mp->m_sb) ||
3528 (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
Nathan Scottda087ba2005-11-02 15:00:20 +11003529 __int64_t sbfields = 0;
3530
Eric Sandeen3685c2a2007-10-11 17:42:32 +10003531 spin_lock(&mp->m_sb_lock);
Eric Sandeen62118702008-03-06 13:44:28 +11003532 if (!xfs_sb_version_hasattr(&mp->m_sb)) {
3533 xfs_sb_version_addattr(&mp->m_sb);
Nathan Scottda087ba2005-11-02 15:00:20 +11003534 sbfields |= XFS_SB_VERSIONNUM;
Nathan Scottd8cc8902005-11-02 10:34:53 +11003535 }
Eric Sandeen62118702008-03-06 13:44:28 +11003536 if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
3537 xfs_sb_version_addattr2(&mp->m_sb);
Nathan Scottda087ba2005-11-02 15:00:20 +11003538 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003539 }
Nathan Scottda087ba2005-11-02 15:00:20 +11003540 if (sbfields) {
Eric Sandeen3685c2a2007-10-11 17:42:32 +10003541 spin_unlock(&mp->m_sb_lock);
Nathan Scottda087ba2005-11-02 15:00:20 +11003542 xfs_mod_sb(tp, sbfields);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003543 } else
Eric Sandeen3685c2a2007-10-11 17:42:32 +10003544 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00003546
3547 error = xfs_bmap_finish(&tp, &flist, &committed);
3548 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549 goto error2;
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00003550 return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003551error2:
3552 xfs_bmap_cancel(&flist);
3553error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3555error0:
3556 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003557 return error;
3558}
3559
3560/*
3561 * Add the extent to the list of extents to be free at transaction end.
3562 * The list is maintained sorted (by block number).
3563 */
3564/* ARGSUSED */
3565void
3566xfs_bmap_add_free(
3567 xfs_fsblock_t bno, /* fs block number of extent */
3568 xfs_filblks_t len, /* length of extent */
3569 xfs_bmap_free_t *flist, /* list of extents */
3570 xfs_mount_t *mp) /* mount point structure */
3571{
3572 xfs_bmap_free_item_t *cur; /* current (next) element */
3573 xfs_bmap_free_item_t *new; /* new element */
3574 xfs_bmap_free_item_t *prev; /* previous element */
3575#ifdef DEBUG
3576 xfs_agnumber_t agno;
3577 xfs_agblock_t agbno;
3578
3579 ASSERT(bno != NULLFSBLOCK);
3580 ASSERT(len > 0);
3581 ASSERT(len <= MAXEXTLEN);
Eric Sandeen9d87c312009-01-14 23:22:07 -06003582 ASSERT(!isnullstartblock(bno));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003583 agno = XFS_FSB_TO_AGNO(mp, bno);
3584 agbno = XFS_FSB_TO_AGBNO(mp, bno);
3585 ASSERT(agno < mp->m_sb.sb_agcount);
3586 ASSERT(agbno < mp->m_sb.sb_agblocks);
3587 ASSERT(len < mp->m_sb.sb_agblocks);
3588 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
3589#endif
3590 ASSERT(xfs_bmap_free_item_zone != NULL);
3591 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
3592 new->xbfi_startblock = bno;
3593 new->xbfi_blockcount = (xfs_extlen_t)len;
3594 for (prev = NULL, cur = flist->xbf_first;
3595 cur != NULL;
3596 prev = cur, cur = cur->xbfi_next) {
3597 if (cur->xbfi_startblock >= bno)
3598 break;
3599 }
3600 if (prev)
3601 prev->xbfi_next = new;
3602 else
3603 flist->xbf_first = new;
3604 new->xbfi_next = cur;
3605 flist->xbf_count++;
3606}
3607
3608/*
3609 * Compute and fill in the value of the maximum depth of a bmap btree
3610 * in this filesystem. Done once, during mount.
3611 */
3612void
3613xfs_bmap_compute_maxlevels(
3614 xfs_mount_t *mp, /* file system mount structure */
3615 int whichfork) /* data or attr fork */
3616{
3617 int level; /* btree level */
3618 uint maxblocks; /* max blocks at this level */
3619 uint maxleafents; /* max leaf entries possible */
3620 int maxrootrecs; /* max records in root block */
3621 int minleafrecs; /* min records in leaf block */
3622 int minnoderecs; /* min records in node block */
3623 int sz; /* root block size */
3624
3625 /*
3626 * The maximum number of extents in a file, hence the maximum
3627 * number of leaf entries, is controlled by the type of di_nextents
3628 * (a signed 32-bit number, xfs_extnum_t), or by di_anextents
3629 * (a signed 16-bit number, xfs_aextnum_t).
Tim Shimmin6d1337b2008-04-17 16:50:16 +10003630 *
3631 * Note that we can no longer assume that if we are in ATTR1 that
Christoph Hellwig1a5902c2009-03-29 19:26:46 +02003632 * the fork offset of all the inodes will be
3633 * (xfs_default_attroffset(ip) >> 3) because we could have mounted
3634 * with ATTR2 and then mounted back with ATTR1, keeping the
3635 * di_forkoff's fixed but probably at various positions. Therefore,
3636 * for both ATTR1 and ATTR2 we have to assume the worst case scenario
3637 * of a minimum size available.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003638 */
Nathan Scottd8cc8902005-11-02 10:34:53 +11003639 if (whichfork == XFS_DATA_FORK) {
3640 maxleafents = MAXEXTNUM;
Tim Shimmin6d1337b2008-04-17 16:50:16 +10003641 sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003642 } else {
3643 maxleafents = MAXAEXTNUM;
Tim Shimmin6d1337b2008-04-17 16:50:16 +10003644 sz = XFS_BMDR_SPACE_CALC(MINABTPTRS);
Nathan Scottd8cc8902005-11-02 10:34:53 +11003645 }
Christoph Hellwig60197e82008-10-30 17:11:19 +11003646 maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647 minleafrecs = mp->m_bmap_dmnr[0];
3648 minnoderecs = mp->m_bmap_dmnr[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003649 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
3650 for (level = 1; maxblocks > 1; level++) {
3651 if (maxblocks <= maxrootrecs)
3652 maxblocks = 1;
3653 else
3654 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
3655 }
3656 mp->m_bm_maxlevels[whichfork] = level;
3657}
3658
3659/*
3660 * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
3661 * caller. Frees all the extents that need freeing, which must be done
3662 * last due to locking considerations. We never free any extents in
Christoph Hellwig859f57c2011-08-27 14:45:11 +00003663 * the first transaction.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003664 *
3665 * Return 1 if the given transaction was committed and a new one
3666 * started, and 0 otherwise in the committed parameter.
3667 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003668int /* error */
3669xfs_bmap_finish(
3670 xfs_trans_t **tp, /* transaction pointer addr */
3671 xfs_bmap_free_t *flist, /* i/o: list extents to free */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672 int *committed) /* xact committed or not */
3673{
3674 xfs_efd_log_item_t *efd; /* extent free data */
3675 xfs_efi_log_item_t *efi; /* extent free intention */
3676 int error; /* error return value */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003677 xfs_bmap_free_item_t *free; /* free extent item */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678 unsigned int logres; /* new log reservation */
3679 unsigned int logcount; /* new log count */
3680 xfs_mount_t *mp; /* filesystem mount structure */
3681 xfs_bmap_free_item_t *next; /* next item on free list */
3682 xfs_trans_t *ntp; /* new transaction pointer */
3683
3684 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
3685 if (flist->xbf_count == 0) {
3686 *committed = 0;
3687 return 0;
3688 }
3689 ntp = *tp;
3690 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
3691 for (free = flist->xbf_first; free; free = free->xbfi_next)
3692 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
3693 free->xbfi_blockcount);
3694 logres = ntp->t_log_res;
3695 logcount = ntp->t_log_count;
3696 ntp = xfs_trans_dup(*tp);
Eric Sandeen1c72bf92007-05-08 13:48:42 +10003697 error = xfs_trans_commit(*tp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003698 *tp = ntp;
3699 *committed = 1;
3700 /*
3701 * We have a new transaction, so we should return committed=1,
3702 * even though we're returning an error.
3703 */
Dave Chinnercc09c0d2008-11-17 17:37:10 +11003704 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003705 return error;
Dave Chinnercc09c0d2008-11-17 17:37:10 +11003706
3707 /*
3708 * transaction commit worked ok so we can drop the extra ticket
3709 * reference that we gained in xfs_trans_dup()
3710 */
3711 xfs_log_ticket_put(ntp->t_ticket);
3712
Linus Torvalds1da177e2005-04-16 15:20:36 -07003713 if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
3714 logcount)))
3715 return error;
3716 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
3717 for (free = flist->xbf_first; free != NULL; free = next) {
3718 next = free->xbfi_next;
3719 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
3720 free->xbfi_blockcount))) {
3721 /*
3722 * The bmap free list will be cleaned up at a
3723 * higher level. The EFI will be canceled when
3724 * this transaction is aborted.
3725 * Need to force shutdown here to make sure it
3726 * happens, since this transaction may not be
3727 * dirty yet.
3728 */
3729 mp = ntp->t_mountp;
3730 if (!XFS_FORCED_SHUTDOWN(mp))
3731 xfs_force_shutdown(mp,
3732 (error == EFSCORRUPTED) ?
Nathan Scott7d04a332006-06-09 14:58:38 +10003733 SHUTDOWN_CORRUPT_INCORE :
3734 SHUTDOWN_META_IO_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735 return error;
3736 }
3737 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
3738 free->xbfi_blockcount);
3739 xfs_bmap_del_free(flist, NULL, free);
3740 }
3741 return 0;
3742}
3743
3744/*
3745 * Free up any items left in the list.
3746 */
3747void
3748xfs_bmap_cancel(
3749 xfs_bmap_free_t *flist) /* list of bmap_free_items */
3750{
3751 xfs_bmap_free_item_t *free; /* free list item */
3752 xfs_bmap_free_item_t *next;
3753
3754 if (flist->xbf_count == 0)
3755 return;
3756 ASSERT(flist->xbf_first != NULL);
3757 for (free = flist->xbf_first; free; free = next) {
3758 next = free->xbfi_next;
3759 xfs_bmap_del_free(flist, NULL, free);
3760 }
3761 ASSERT(flist->xbf_count == 0);
3762}
3763
3764/*
3765 * Returns the file-relative block number of the first unused block(s)
3766 * in the file with at least "len" logically contiguous blocks free.
3767 * This is the lowest-address hole if the file has holes, else the first block
3768 * past the end of file.
3769 * Return 0 if the file is currently local (in-inode).
3770 */
3771int /* error */
3772xfs_bmap_first_unused(
3773 xfs_trans_t *tp, /* transaction pointer */
3774 xfs_inode_t *ip, /* incore inode */
3775 xfs_extlen_t len, /* size of hole to find */
3776 xfs_fileoff_t *first_unused, /* unused block */
3777 int whichfork) /* data or attr fork */
3778{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003779 int error; /* error return value */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003780 int idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781 xfs_ifork_t *ifp; /* inode fork pointer */
3782 xfs_fileoff_t lastaddr; /* last block number seen */
3783 xfs_fileoff_t lowest; /* lowest useful block */
3784 xfs_fileoff_t max; /* starting useful block */
3785 xfs_fileoff_t off; /* offset for this block */
3786 xfs_extnum_t nextents; /* number of extent entries */
3787
3788 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
3789 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
3790 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3791 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
3792 *first_unused = 0;
3793 return 0;
3794 }
3795 ifp = XFS_IFORK_PTR(ip, whichfork);
3796 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
3797 (error = xfs_iread_extents(tp, ip, whichfork)))
3798 return error;
3799 lowest = *first_unused;
3800 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003801 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003802 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003803 off = xfs_bmbt_get_startoff(ep);
3804 /*
3805 * See if the hole before this extent will work.
3806 */
3807 if (off >= lowest + len && off - max >= len) {
3808 *first_unused = max;
3809 return 0;
3810 }
3811 lastaddr = off + xfs_bmbt_get_blockcount(ep);
3812 max = XFS_FILEOFF_MAX(lastaddr, lowest);
3813 }
3814 *first_unused = max;
3815 return 0;
3816}
3817
3818/*
3819 * Returns the file-relative block number of the last block + 1 before
3820 * last_block (input value) in the file.
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003821 * This is not based on i_size, it is based on the extent records.
3822 * Returns 0 for local files, as they do not have extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003823 */
3824int /* error */
3825xfs_bmap_last_before(
3826 xfs_trans_t *tp, /* transaction pointer */
3827 xfs_inode_t *ip, /* incore inode */
3828 xfs_fileoff_t *last_block, /* last block */
3829 int whichfork) /* data or attr fork */
3830{
3831 xfs_fileoff_t bno; /* input file offset */
3832 int eof; /* hit end of file */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003833 xfs_bmbt_rec_host_t *ep; /* pointer to last extent */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003834 int error; /* error return value */
3835 xfs_bmbt_irec_t got; /* current extent value */
3836 xfs_ifork_t *ifp; /* inode fork pointer */
3837 xfs_extnum_t lastx; /* last extent used */
3838 xfs_bmbt_irec_t prev; /* previous extent value */
3839
3840 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
3841 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
3842 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
3843 return XFS_ERROR(EIO);
3844 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
3845 *last_block = 0;
3846 return 0;
3847 }
3848 ifp = XFS_IFORK_PTR(ip, whichfork);
3849 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
3850 (error = xfs_iread_extents(tp, ip, whichfork)))
3851 return error;
3852 bno = *last_block - 1;
3853 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
3854 &prev);
3855 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
3856 if (prev.br_startoff == NULLFILEOFF)
3857 *last_block = 0;
3858 else
3859 *last_block = prev.br_startoff + prev.br_blockcount;
3860 }
3861 /*
3862 * Otherwise *last_block is already the right answer.
3863 */
3864 return 0;
3865}
3866
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003867STATIC int
3868xfs_bmap_last_extent(
3869 struct xfs_trans *tp,
3870 struct xfs_inode *ip,
3871 int whichfork,
3872 struct xfs_bmbt_irec *rec,
3873 int *is_empty)
3874{
3875 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
3876 int error;
3877 int nextents;
3878
3879 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
3880 error = xfs_iread_extents(tp, ip, whichfork);
3881 if (error)
3882 return error;
3883 }
3884
3885 nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
3886 if (nextents == 0) {
3887 *is_empty = 1;
3888 return 0;
3889 }
3890
3891 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec);
3892 *is_empty = 0;
3893 return 0;
3894}
3895
3896/*
3897 * Check the last inode extent to determine whether this allocation will result
3898 * in blocks being allocated at the end of the file. When we allocate new data
3899 * blocks at the end of the file which do not start at the previous data block,
3900 * we will try to align the new blocks at stripe unit boundaries.
3901 *
Dave Chinner1b164472011-09-18 20:40:55 +00003902 * Returns 0 in bma->aeof if the file (fork) is empty as any new write will be
3903 * at, or past the EOF.
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003904 */
3905STATIC int
3906xfs_bmap_isaeof(
Dave Chinner1b164472011-09-18 20:40:55 +00003907 struct xfs_bmalloca *bma,
3908 int whichfork)
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003909{
3910 struct xfs_bmbt_irec rec;
3911 int is_empty;
3912 int error;
3913
Dave Chinner1b164472011-09-18 20:40:55 +00003914 bma->aeof = 0;
3915 error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec,
3916 &is_empty);
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003917 if (error || is_empty)
3918 return error;
3919
3920 /*
3921 * Check if we are allocation or past the last extent, or at least into
3922 * the last delayed allocated extent.
3923 */
Dave Chinner3a756672011-09-18 20:40:58 +00003924 bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount ||
3925 (bma->offset >= rec.br_startoff &&
Dave Chinner1b164472011-09-18 20:40:55 +00003926 isnullstartblock(rec.br_startblock));
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003927 return 0;
3928}
3929
3930/*
3931 * Check if the endoff is outside the last extent. If so the caller will grow
3932 * the allocation to a stripe unit boundary. All offsets are considered outside
3933 * the end of file for an empty fork, so 1 is returned in *eof in that case.
3934 */
3935int
3936xfs_bmap_eof(
3937 struct xfs_inode *ip,
3938 xfs_fileoff_t endoff,
3939 int whichfork,
3940 int *eof)
3941{
3942 struct xfs_bmbt_irec rec;
3943 int error;
3944
3945 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, eof);
3946 if (error || *eof)
3947 return error;
3948
3949 *eof = endoff >= rec.br_startoff + rec.br_blockcount;
3950 return 0;
3951}
3952
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953/*
3954 * Returns the file-relative block number of the first block past eof in
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11003955 * the file. This is not based on i_size, it is based on the extent records.
3956 * Returns 0 for local files, as they do not have extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003957 */
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003958int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003959xfs_bmap_last_offset(
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003960 struct xfs_trans *tp,
3961 struct xfs_inode *ip,
3962 xfs_fileoff_t *last_block,
3963 int whichfork)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003964{
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003965 struct xfs_bmbt_irec rec;
3966 int is_empty;
3967 int error;
3968
3969 *last_block = 0;
3970
3971 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL)
3972 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973
3974 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003975 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003976 return XFS_ERROR(EIO);
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003977
3978 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty);
3979 if (error || is_empty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980 return error;
Christoph Hellwig27a3f8f2011-09-18 20:40:53 +00003981
3982 *last_block = rec.br_startoff + rec.br_blockcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003983 return 0;
3984}
3985
3986/*
3987 * Returns whether the selected fork of the inode has exactly one
3988 * block or not. For the data fork we check this matches di_size,
3989 * implying the file's range is 0..bsize-1.
3990 */
3991int /* 1=>1 block, 0=>otherwise */
3992xfs_bmap_one_block(
3993 xfs_inode_t *ip, /* incore inode */
3994 int whichfork) /* data or attr fork */
3995{
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10003996 xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003997 xfs_ifork_t *ifp; /* inode fork pointer */
3998 int rval; /* return value */
3999 xfs_bmbt_irec_t s; /* internal version of extent */
4000
4001#ifndef DEBUG
Christoph Hellwigce7ae1512011-12-18 20:00:11 +00004002 if (whichfork == XFS_DATA_FORK)
4003 return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004#endif /* !DEBUG */
4005 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
4006 return 0;
4007 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4008 return 0;
4009 ifp = XFS_IFORK_PTR(ip, whichfork);
4010 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004011 ep = xfs_iext_get_ext(ifp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004012 xfs_bmbt_get_all(ep, &s);
4013 rval = s.br_startoff == 0 && s.br_blockcount == 1;
4014 if (rval && whichfork == XFS_DATA_FORK)
Christoph Hellwigce7ae1512011-12-18 20:00:11 +00004015 ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004016 return rval;
4017}
4018
Christoph Hellwig4e8938f2008-10-30 17:14:43 +11004019STATIC int
4020xfs_bmap_sanity_check(
4021 struct xfs_mount *mp,
4022 struct xfs_buf *bp,
4023 int level)
4024{
4025 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
4026
Christoph Hellwig69ef9212011-07-08 14:36:05 +02004027 if (block->bb_magic != cpu_to_be32(XFS_BMAP_MAGIC) ||
Christoph Hellwig4e8938f2008-10-30 17:14:43 +11004028 be16_to_cpu(block->bb_level) != level ||
4029 be16_to_cpu(block->bb_numrecs) == 0 ||
4030 be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
4031 return 0;
4032 return 1;
4033}
4034
Linus Torvalds1da177e2005-04-16 15:20:36 -07004035/*
4036 * Read in the extents to if_extents.
4037 * All inode fields are set up by caller, we just traverse the btree
4038 * and copy the records in. If the file system cannot contain unwritten
4039 * extents, the records are checked for no "state" flags.
4040 */
4041int /* error */
4042xfs_bmap_read_extents(
4043 xfs_trans_t *tp, /* transaction pointer */
4044 xfs_inode_t *ip, /* incore inode */
4045 int whichfork) /* data or attr fork */
4046{
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11004047 struct xfs_btree_block *block; /* current btree block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004048 xfs_fsblock_t bno; /* block # of "block" */
4049 xfs_buf_t *bp; /* buffer for "block" */
4050 int error; /* error return value */
4051 xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004052 xfs_extnum_t i, j; /* index into the extents list */
4053 xfs_ifork_t *ifp; /* fork structure */
4054 int level; /* btree level, for checking */
4055 xfs_mount_t *mp; /* file system mount structure */
Christoph Hellwig576039c2006-09-28 10:58:06 +10004056 __be64 *pp; /* pointer to block address */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004057 /* REFERENCED */
4058 xfs_extnum_t room; /* number of entries there's room for */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004059
4060 bno = NULLFSBLOCK;
4061 mp = ip->i_mount;
4062 ifp = XFS_IFORK_PTR(ip, whichfork);
4063 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
4064 XFS_EXTFMT_INODE(ip);
4065 block = ifp->if_broot;
4066 /*
4067 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
4068 */
Christoph Hellwig16259e72005-11-02 15:11:25 +11004069 level = be16_to_cpu(block->bb_level);
4070 ASSERT(level > 0);
Christoph Hellwig60197e82008-10-30 17:11:19 +11004071 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
Christoph Hellwig576039c2006-09-28 10:58:06 +10004072 bno = be64_to_cpu(*pp);
4073 ASSERT(bno != NULLDFSBNO);
4074 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
4075 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004076 /*
4077 * Go down the tree until leaf level is reached, following the first
4078 * pointer (leftmost) at each level.
4079 */
4080 while (level-- > 0) {
4081 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4082 XFS_BMAP_BTREE_REF)))
4083 return error;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11004084 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004085 XFS_WANT_CORRUPTED_GOTO(
Christoph Hellwig4e8938f2008-10-30 17:14:43 +11004086 xfs_bmap_sanity_check(mp, bp, level),
Linus Torvalds1da177e2005-04-16 15:20:36 -07004087 error0);
4088 if (level == 0)
4089 break;
Christoph Hellwig136341b2008-10-30 17:11:40 +11004090 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
Christoph Hellwig576039c2006-09-28 10:58:06 +10004091 bno = be64_to_cpu(*pp);
4092 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093 xfs_trans_brelse(tp, bp);
4094 }
4095 /*
4096 * Here with bp and block set to the leftmost leaf node in the tree.
4097 */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004098 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004099 i = 0;
4100 /*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004101 * Loop over all leaf nodes. Copy information to the extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004102 */
4103 for (;;) {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10004104 xfs_bmbt_rec_t *frp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004105 xfs_fsblock_t nextbno;
4106 xfs_extnum_t num_recs;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004107 xfs_extnum_t start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11004109 num_recs = xfs_btree_get_numrecs(block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110 if (unlikely(i + num_recs > room)) {
4111 ASSERT(i + num_recs <= room);
Dave Chinner65333b42011-03-07 10:03:35 +11004112 xfs_warn(ip->i_mount,
Nathan Scott3762ec62006-01-12 10:29:53 +11004113 "corrupt dinode %Lu, (btree extents).",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004114 (unsigned long long) ip->i_ino);
Dave Chinner65333b42011-03-07 10:03:35 +11004115 XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)",
4116 XFS_ERRLEVEL_LOW, ip->i_mount, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117 goto error0;
4118 }
4119 XFS_WANT_CORRUPTED_GOTO(
Christoph Hellwig4e8938f2008-10-30 17:14:43 +11004120 xfs_bmap_sanity_check(mp, bp, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -07004121 error0);
4122 /*
4123 * Read-ahead the next leaf block, if any.
4124 */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11004125 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004126 if (nextbno != NULLFSBLOCK)
4127 xfs_btree_reada_bufl(mp, nextbno, 1);
4128 /*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004129 * Copy records into the extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004130 */
Christoph Hellwig136341b2008-10-30 17:11:40 +11004131 frp = XFS_BMBT_REC_ADDR(mp, block, 1);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004132 start = i;
4133 for (j = 0; j < num_recs; j++, i++, frp++) {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10004134 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
Christoph Hellwigcd8b0a92007-08-16 16:24:15 +10004135 trp->l0 = be64_to_cpu(frp->l0);
4136 trp->l1 = be64_to_cpu(frp->l1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004137 }
4138 if (exntf == XFS_EXTFMT_NOSTATE) {
4139 /*
4140 * Check all attribute bmap btree records and
4141 * any "older" data bmap btree records for a
4142 * set bit in the "extent flag" position.
4143 */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004144 if (unlikely(xfs_check_nostate_extents(ifp,
4145 start, num_recs))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
4147 XFS_ERRLEVEL_LOW,
4148 ip->i_mount);
4149 goto error0;
4150 }
4151 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004152 xfs_trans_brelse(tp, bp);
4153 bno = nextbno;
4154 /*
4155 * If we've reached the end, stop.
4156 */
4157 if (bno == NULLFSBLOCK)
4158 break;
4159 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4160 XFS_BMAP_BTREE_REF)))
4161 return error;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11004162 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163 }
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004164 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004165 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
Eric Sandeen3a59c942007-07-11 11:09:47 +10004166 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004167 return 0;
4168error0:
4169 xfs_trans_brelse(tp, bp);
4170 return XFS_ERROR(EFSCORRUPTED);
4171}
4172
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00004173#ifdef DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07004174/*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004175 * Add bmap trace insert entries for all the contents of the extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176 */
4177void
4178xfs_bmap_trace_exlist(
Linus Torvalds1da177e2005-04-16 15:20:36 -07004179 xfs_inode_t *ip, /* incore inode pointer */
4180 xfs_extnum_t cnt, /* count of entries in the list */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00004181 int whichfork, /* data or attr fork */
4182 unsigned long caller_ip)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004183{
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004184 xfs_extnum_t idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004185 xfs_ifork_t *ifp; /* inode fork pointer */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00004186 int state = 0;
4187
4188 if (whichfork == XFS_ATTR_FORK)
4189 state |= BMAP_ATTRFORK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190
4191 ifp = XFS_IFORK_PTR(ip, whichfork);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11004192 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00004193 for (idx = 0; idx < cnt; idx++)
4194 trace_xfs_extlist(ip, idx, whichfork, caller_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004195}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004196
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197/*
4198 * Validate that the bmbt_irecs being returned from bmapi are valid
4199 * given the callers original parameters. Specifically check the
4200 * ranges of the returned irecs to ensure that they only extent beyond
4201 * the given parameters if the XFS_BMAPI_ENTIRE flag was set.
4202 */
4203STATIC void
4204xfs_bmap_validate_ret(
4205 xfs_fileoff_t bno,
4206 xfs_filblks_t len,
4207 int flags,
4208 xfs_bmbt_irec_t *mval,
4209 int nmap,
4210 int ret_nmap)
4211{
4212 int i; /* index to map values */
4213
4214 ASSERT(ret_nmap <= nmap);
4215
4216 for (i = 0; i < ret_nmap; i++) {
4217 ASSERT(mval[i].br_blockcount > 0);
4218 if (!(flags & XFS_BMAPI_ENTIRE)) {
4219 ASSERT(mval[i].br_startoff >= bno);
4220 ASSERT(mval[i].br_blockcount <= len);
4221 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
4222 bno + len);
4223 } else {
4224 ASSERT(mval[i].br_startoff < bno + len);
4225 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
4226 bno);
4227 }
4228 ASSERT(i == 0 ||
4229 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
4230 mval[i].br_startoff);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004231 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
4232 mval[i].br_startblock != HOLESTARTBLOCK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004233 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
4234 mval[i].br_state == XFS_EXT_UNWRITTEN);
4235 }
4236}
4237#endif /* DEBUG */
4238
4239
4240/*
Dave Chinneraef9a892011-09-18 20:40:44 +00004241 * Trim the returned map to the required bounds
4242 */
4243STATIC void
4244xfs_bmapi_trim_map(
4245 struct xfs_bmbt_irec *mval,
4246 struct xfs_bmbt_irec *got,
4247 xfs_fileoff_t *bno,
4248 xfs_filblks_t len,
4249 xfs_fileoff_t obno,
4250 xfs_fileoff_t end,
4251 int n,
4252 int flags)
4253{
4254 if ((flags & XFS_BMAPI_ENTIRE) ||
4255 got->br_startoff + got->br_blockcount <= obno) {
4256 *mval = *got;
4257 if (isnullstartblock(got->br_startblock))
4258 mval->br_startblock = DELAYSTARTBLOCK;
4259 return;
4260 }
4261
4262 if (obno > *bno)
4263 *bno = obno;
4264 ASSERT((*bno >= obno) || (n == 0));
4265 ASSERT(*bno < end);
4266 mval->br_startoff = *bno;
4267 if (isnullstartblock(got->br_startblock))
4268 mval->br_startblock = DELAYSTARTBLOCK;
4269 else
4270 mval->br_startblock = got->br_startblock +
4271 (*bno - got->br_startoff);
4272 /*
4273 * Return the minimum of what we got and what we asked for for
4274 * the length. We can use the len variable here because it is
4275 * modified below and we could have been there before coming
4276 * here if the first part of the allocation didn't overlap what
4277 * was asked for.
4278 */
4279 mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno,
4280 got->br_blockcount - (*bno - got->br_startoff));
4281 mval->br_state = got->br_state;
4282 ASSERT(mval->br_blockcount <= len);
4283 return;
4284}
4285
4286/*
4287 * Update and validate the extent map to return
4288 */
4289STATIC void
4290xfs_bmapi_update_map(
4291 struct xfs_bmbt_irec **map,
4292 xfs_fileoff_t *bno,
4293 xfs_filblks_t *len,
4294 xfs_fileoff_t obno,
4295 xfs_fileoff_t end,
4296 int *n,
4297 int flags)
4298{
4299 xfs_bmbt_irec_t *mval = *map;
4300
4301 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
4302 ((mval->br_startoff + mval->br_blockcount) <= end));
4303 ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) ||
4304 (mval->br_startoff < obno));
4305
4306 *bno = mval->br_startoff + mval->br_blockcount;
4307 *len = end - *bno;
4308 if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) {
4309 /* update previous map with new information */
4310 ASSERT(mval->br_startblock == mval[-1].br_startblock);
4311 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
4312 ASSERT(mval->br_state == mval[-1].br_state);
4313 mval[-1].br_blockcount = mval->br_blockcount;
4314 mval[-1].br_state = mval->br_state;
4315 } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
4316 mval[-1].br_startblock != DELAYSTARTBLOCK &&
4317 mval[-1].br_startblock != HOLESTARTBLOCK &&
4318 mval->br_startblock == mval[-1].br_startblock +
4319 mval[-1].br_blockcount &&
4320 ((flags & XFS_BMAPI_IGSTATE) ||
4321 mval[-1].br_state == mval->br_state)) {
4322 ASSERT(mval->br_startoff ==
4323 mval[-1].br_startoff + mval[-1].br_blockcount);
4324 mval[-1].br_blockcount += mval->br_blockcount;
4325 } else if (*n > 0 &&
4326 mval->br_startblock == DELAYSTARTBLOCK &&
4327 mval[-1].br_startblock == DELAYSTARTBLOCK &&
4328 mval->br_startoff ==
4329 mval[-1].br_startoff + mval[-1].br_blockcount) {
4330 mval[-1].br_blockcount += mval->br_blockcount;
4331 mval[-1].br_state = mval->br_state;
4332 } else if (!((*n == 0) &&
4333 ((mval->br_startoff + mval->br_blockcount) <=
4334 obno))) {
4335 mval++;
4336 (*n)++;
4337 }
4338 *map = mval;
4339}
4340
4341/*
Dave Chinner5c8ed202011-09-18 20:40:45 +00004342 * Map file blocks to filesystem blocks without allocation.
4343 */
4344int
4345xfs_bmapi_read(
4346 struct xfs_inode *ip,
4347 xfs_fileoff_t bno,
4348 xfs_filblks_t len,
4349 struct xfs_bmbt_irec *mval,
4350 int *nmap,
4351 int flags)
4352{
4353 struct xfs_mount *mp = ip->i_mount;
4354 struct xfs_ifork *ifp;
4355 struct xfs_bmbt_irec got;
4356 struct xfs_bmbt_irec prev;
4357 xfs_fileoff_t obno;
4358 xfs_fileoff_t end;
4359 xfs_extnum_t lastx;
4360 int error;
4361 int eof;
4362 int n = 0;
4363 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4364 XFS_ATTR_FORK : XFS_DATA_FORK;
4365
4366 ASSERT(*nmap >= 1);
4367 ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE|
4368 XFS_BMAPI_IGSTATE)));
4369
4370 if (unlikely(XFS_TEST_ERROR(
4371 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4372 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
4373 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4374 XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp);
4375 return XFS_ERROR(EFSCORRUPTED);
4376 }
4377
4378 if (XFS_FORCED_SHUTDOWN(mp))
4379 return XFS_ERROR(EIO);
4380
4381 XFS_STATS_INC(xs_blk_mapr);
4382
4383 ifp = XFS_IFORK_PTR(ip, whichfork);
Dave Chinner5c8ed202011-09-18 20:40:45 +00004384
4385 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4386 error = xfs_iread_extents(NULL, ip, whichfork);
4387 if (error)
4388 return error;
4389 }
4390
4391 xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev);
4392 end = bno + len;
4393 obno = bno;
4394
4395 while (bno < end && n < *nmap) {
4396 /* Reading past eof, act as though there's a hole up to end. */
4397 if (eof)
4398 got.br_startoff = end;
4399 if (got.br_startoff > bno) {
4400 /* Reading in a hole. */
4401 mval->br_startoff = bno;
4402 mval->br_startblock = HOLESTARTBLOCK;
4403 mval->br_blockcount =
4404 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
4405 mval->br_state = XFS_EXT_NORM;
4406 bno += mval->br_blockcount;
4407 len -= mval->br_blockcount;
4408 mval++;
4409 n++;
4410 continue;
4411 }
4412
4413 /* set up the extent map to return. */
4414 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4415 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4416
4417 /* If we're done, stop now. */
4418 if (bno >= end || n >= *nmap)
4419 break;
4420
4421 /* Else go on to the next record. */
4422 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4423 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4424 else
4425 eof = 1;
4426 }
4427 *nmap = n;
4428 return 0;
4429}
4430
Christoph Hellwigb64dfe42011-09-18 20:40:47 +00004431STATIC int
4432xfs_bmapi_reserve_delalloc(
4433 struct xfs_inode *ip,
4434 xfs_fileoff_t aoff,
4435 xfs_filblks_t len,
4436 struct xfs_bmbt_irec *got,
4437 struct xfs_bmbt_irec *prev,
4438 xfs_extnum_t *lastx,
4439 int eof)
4440{
4441 struct xfs_mount *mp = ip->i_mount;
4442 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4443 xfs_extlen_t alen;
4444 xfs_extlen_t indlen;
Christoph Hellwigb64dfe42011-09-18 20:40:47 +00004445 char rt = XFS_IS_REALTIME_INODE(ip);
4446 xfs_extlen_t extsz;
4447 int error;
4448
4449 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN);
4450 if (!eof)
4451 alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
4452
4453 /* Figure out the extent size, adjust alen */
4454 extsz = xfs_get_extsz_hint(ip);
4455 if (extsz) {
4456 /*
4457 * Make sure we don't exceed a single extent length when we
4458 * align the extent by reducing length we are going to
4459 * allocate by the maximum amount extent size aligment may
4460 * require.
4461 */
4462 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN - (2 * extsz - 1));
4463 error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof,
4464 1, 0, &aoff, &alen);
4465 ASSERT(!error);
4466 }
4467
4468 if (rt)
4469 extsz = alen / mp->m_sb.sb_rextsize;
4470
4471 /*
4472 * Make a transaction-less quota reservation for delayed allocation
4473 * blocks. This number gets adjusted later. We return if we haven't
4474 * allocated blocks already inside this loop.
4475 */
4476 error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0,
4477 rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4478 if (error)
4479 return error;
4480
4481 /*
4482 * Split changing sb for alen and indlen since they could be coming
4483 * from different places.
4484 */
4485 indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen);
4486 ASSERT(indlen > 0);
4487
4488 if (rt) {
4489 error = xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
4490 -((int64_t)extsz), 0);
4491 } else {
4492 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4493 -((int64_t)alen), 0);
4494 }
4495
4496 if (error)
4497 goto out_unreserve_quota;
4498
4499 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4500 -((int64_t)indlen), 0);
4501 if (error)
4502 goto out_unreserve_blocks;
4503
4504
4505 ip->i_delayed_blks += alen;
4506
4507 got->br_startoff = aoff;
4508 got->br_startblock = nullstartblock(indlen);
4509 got->br_blockcount = alen;
4510 got->br_state = XFS_EXT_NORM;
Christoph Hellwig1fd044d2011-09-18 20:40:49 +00004511 xfs_bmap_add_extent_hole_delay(ip, lastx, got);
Christoph Hellwigb64dfe42011-09-18 20:40:47 +00004512
4513 /*
Christoph Hellwig1fd044d2011-09-18 20:40:49 +00004514 * Update our extent pointer, given that xfs_bmap_add_extent_hole_delay
4515 * might have merged it into one of the neighbouring ones.
Christoph Hellwigb64dfe42011-09-18 20:40:47 +00004516 */
4517 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got);
4518
4519 ASSERT(got->br_startoff <= aoff);
4520 ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen);
4521 ASSERT(isnullstartblock(got->br_startblock));
4522 ASSERT(got->br_state == XFS_EXT_NORM);
4523 return 0;
4524
4525out_unreserve_blocks:
4526 if (rt)
4527 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, extsz, 0);
4528 else
4529 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, alen, 0);
4530out_unreserve_quota:
4531 if (XFS_IS_QUOTA_ON(mp))
Dave Chinnerea562ed2012-05-08 20:48:53 +10004532 xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ?
Christoph Hellwigb64dfe42011-09-18 20:40:47 +00004533 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4534 return error;
4535}
4536
Dave Chinner5c8ed202011-09-18 20:40:45 +00004537/*
Christoph Hellwig44032802011-09-18 20:40:48 +00004538 * Map file blocks to filesystem blocks, adding delayed allocations as needed.
4539 */
4540int
4541xfs_bmapi_delay(
4542 struct xfs_inode *ip, /* incore inode */
4543 xfs_fileoff_t bno, /* starting file offs. mapped */
4544 xfs_filblks_t len, /* length to map in file */
4545 struct xfs_bmbt_irec *mval, /* output: map values */
4546 int *nmap, /* i/o: mval size/count */
4547 int flags) /* XFS_BMAPI_... */
4548{
4549 struct xfs_mount *mp = ip->i_mount;
4550 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4551 struct xfs_bmbt_irec got; /* current file extent record */
4552 struct xfs_bmbt_irec prev; /* previous file extent record */
4553 xfs_fileoff_t obno; /* old block number (offset) */
4554 xfs_fileoff_t end; /* end of mapped file region */
4555 xfs_extnum_t lastx; /* last useful extent number */
4556 int eof; /* we've hit the end of extents */
4557 int n = 0; /* current extent index */
4558 int error = 0;
4559
4560 ASSERT(*nmap >= 1);
4561 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
4562 ASSERT(!(flags & ~XFS_BMAPI_ENTIRE));
4563
4564 if (unlikely(XFS_TEST_ERROR(
4565 (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS &&
4566 XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE),
4567 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4568 XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp);
4569 return XFS_ERROR(EFSCORRUPTED);
4570 }
4571
4572 if (XFS_FORCED_SHUTDOWN(mp))
4573 return XFS_ERROR(EIO);
4574
4575 XFS_STATS_INC(xs_blk_mapw);
4576
4577 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4578 error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
4579 if (error)
4580 return error;
4581 }
4582
4583 xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev);
4584 end = bno + len;
4585 obno = bno;
4586
4587 while (bno < end && n < *nmap) {
4588 if (eof || got.br_startoff > bno) {
4589 error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got,
4590 &prev, &lastx, eof);
4591 if (error) {
4592 if (n == 0) {
4593 *nmap = 0;
4594 return error;
4595 }
4596 break;
4597 }
4598 }
4599
4600 /* set up the extent map to return. */
4601 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4602 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4603
4604 /* If we're done, stop now. */
4605 if (bno >= end || n >= *nmap)
4606 break;
4607
4608 /* Else go on to the next record. */
4609 prev = got;
4610 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4611 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4612 else
4613 eof = 1;
4614 }
4615
4616 *nmap = n;
4617 return 0;
4618}
4619
4620
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004621STATIC int
Dave Chinner1f3c7852012-10-05 11:06:59 +10004622__xfs_bmapi_allocate(
4623 struct xfs_bmalloca *bma)
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004624{
4625 struct xfs_mount *mp = bma->ip->i_mount;
Dave Chinner1f3c7852012-10-05 11:06:59 +10004626 int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ?
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004627 XFS_ATTR_FORK : XFS_DATA_FORK;
4628 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
Christoph Hellwigc315c902011-09-18 20:41:02 +00004629 int tmp_logflags = 0;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004630 int error;
4631 int rt;
4632
Dave Chinnera99ebf42011-12-01 11:24:20 +00004633 ASSERT(bma->length > 0);
4634
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004635 rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(bma->ip);
4636
4637 /*
4638 * For the wasdelay case, we could also just allocate the stuff asked
4639 * for in this bmap call but that wouldn't be as good.
4640 */
4641 if (bma->wasdel) {
Dave Chinner963c30c2011-09-18 20:40:59 +00004642 bma->length = (xfs_extlen_t)bma->got.br_blockcount;
4643 bma->offset = bma->got.br_startoff;
Dave Chinnere0c3da52011-09-18 20:41:01 +00004644 if (bma->idx != NULLEXTNUM && bma->idx) {
4645 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1),
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004646 &bma->prev);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004647 }
4648 } else {
Dave Chinner963c30c2011-09-18 20:40:59 +00004649 bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004650 if (!bma->eof)
Dave Chinner963c30c2011-09-18 20:40:59 +00004651 bma->length = XFS_FILBLKS_MIN(bma->length,
Dave Chinner3a756672011-09-18 20:40:58 +00004652 bma->got.br_startoff - bma->offset);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004653 }
4654
4655 /*
4656 * Indicate if this is the first user data in the file, or just any
4657 * user data.
4658 */
Dave Chinner1f3c7852012-10-05 11:06:59 +10004659 if (!(bma->flags & XFS_BMAPI_METADATA)) {
Dave Chinner963c30c2011-09-18 20:40:59 +00004660 bma->userdata = (bma->offset == 0) ?
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004661 XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA;
4662 }
4663
Dave Chinner1f3c7852012-10-05 11:06:59 +10004664 bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004665
4666 /*
4667 * Only want to do the alignment at the eof if it is userdata and
4668 * allocation length is larger than a stripe unit.
4669 */
Dave Chinner963c30c2011-09-18 20:40:59 +00004670 if (mp->m_dalign && bma->length >= mp->m_dalign &&
Dave Chinner1f3c7852012-10-05 11:06:59 +10004671 !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) {
Dave Chinner1b164472011-09-18 20:40:55 +00004672 error = xfs_bmap_isaeof(bma, whichfork);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004673 if (error)
4674 return error;
4675 }
4676
Dave Chinner1f3c7852012-10-05 11:06:59 +10004677 if (bma->flags & XFS_BMAPI_STACK_SWITCH)
Dave Chinner326c0352012-10-05 11:06:58 +10004678 bma->stack_switch = 1;
4679
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004680 error = xfs_bmap_alloc(bma);
4681 if (error)
4682 return error;
4683
Dave Chinner0937e0f2011-09-18 20:40:57 +00004684 if (bma->flist->xbf_low)
4685 bma->minleft = 0;
Dave Chinner29c8d172011-09-18 20:41:00 +00004686 if (bma->cur)
4687 bma->cur->bc_private.b.firstblock = *bma->firstblock;
Dave Chinner963c30c2011-09-18 20:40:59 +00004688 if (bma->blkno == NULLFSBLOCK)
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004689 return 0;
Dave Chinner29c8d172011-09-18 20:41:00 +00004690 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4691 bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork);
4692 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4693 bma->cur->bc_private.b.flist = bma->flist;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004694 }
4695 /*
4696 * Bump the number of extents we've allocated
4697 * in this call.
4698 */
Dave Chinnere0c3da52011-09-18 20:41:01 +00004699 bma->nallocs++;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004700
Dave Chinner29c8d172011-09-18 20:41:00 +00004701 if (bma->cur)
4702 bma->cur->bc_private.b.flags =
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004703 bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
4704
Dave Chinner963c30c2011-09-18 20:40:59 +00004705 bma->got.br_startoff = bma->offset;
4706 bma->got.br_startblock = bma->blkno;
4707 bma->got.br_blockcount = bma->length;
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004708 bma->got.br_state = XFS_EXT_NORM;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004709
4710 /*
4711 * A wasdelay extent has been initialized, so shouldn't be flagged
4712 * as unwritten.
4713 */
Dave Chinner1f3c7852012-10-05 11:06:59 +10004714 if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) &&
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004715 xfs_sb_version_hasextflgbit(&mp->m_sb))
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004716 bma->got.br_state = XFS_EXT_UNWRITTEN;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004717
Christoph Hellwigc6534242011-09-18 20:41:05 +00004718 if (bma->wasdel)
Christoph Hellwig572a4cf2011-09-18 20:41:04 +00004719 error = xfs_bmap_add_extent_delay_real(bma);
Christoph Hellwigc6534242011-09-18 20:41:05 +00004720 else
4721 error = xfs_bmap_add_extent_hole_real(bma, whichfork);
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00004722
Christoph Hellwigc315c902011-09-18 20:41:02 +00004723 bma->logflags |= tmp_logflags;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004724 if (error)
4725 return error;
4726
4727 /*
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00004728 * Update our extent pointer, given that xfs_bmap_add_extent_delay_real
4729 * or xfs_bmap_add_extent_hole_real might have merged it into one of
4730 * the neighbouring ones.
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004731 */
Dave Chinnere0c3da52011-09-18 20:41:01 +00004732 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004733
Dave Chinner963c30c2011-09-18 20:40:59 +00004734 ASSERT(bma->got.br_startoff <= bma->offset);
4735 ASSERT(bma->got.br_startoff + bma->got.br_blockcount >=
4736 bma->offset + bma->length);
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004737 ASSERT(bma->got.br_state == XFS_EXT_NORM ||
4738 bma->got.br_state == XFS_EXT_UNWRITTEN);
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004739 return 0;
4740}
4741
Dave Chinner1f3c7852012-10-05 11:06:59 +10004742static void
4743xfs_bmapi_allocate_worker(
4744 struct work_struct *work)
4745{
4746 struct xfs_bmalloca *args = container_of(work,
4747 struct xfs_bmalloca, work);
4748 unsigned long pflags;
4749
4750 /* we are in a transaction context here */
4751 current_set_flags_nested(&pflags, PF_FSTRANS);
4752
4753 args->result = __xfs_bmapi_allocate(args);
4754 complete(args->done);
4755
4756 current_restore_flags_nested(&pflags, PF_FSTRANS);
4757}
4758
4759/*
4760 * Some allocation requests often come in with little stack to work on. Push
4761 * them off to a worker thread so there is lots of stack to use. Otherwise just
4762 * call directly to avoid the context switch overhead here.
4763 */
4764int
4765xfs_bmapi_allocate(
4766 struct xfs_bmalloca *args)
4767{
4768 DECLARE_COMPLETION_ONSTACK(done);
4769
4770 if (!args->stack_switch)
4771 return __xfs_bmapi_allocate(args);
4772
4773
4774 args->done = &done;
4775 INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
4776 queue_work(xfs_alloc_wq, &args->work);
4777 wait_for_completion(&done);
4778 return args->result;
4779}
4780
Dave Chinnerb447fe52011-09-18 20:40:51 +00004781STATIC int
4782xfs_bmapi_convert_unwritten(
4783 struct xfs_bmalloca *bma,
4784 struct xfs_bmbt_irec *mval,
4785 xfs_filblks_t len,
Christoph Hellwigc315c902011-09-18 20:41:02 +00004786 int flags)
Dave Chinnerb447fe52011-09-18 20:40:51 +00004787{
4788 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4789 XFS_ATTR_FORK : XFS_DATA_FORK;
4790 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
Christoph Hellwigc315c902011-09-18 20:41:02 +00004791 int tmp_logflags = 0;
Dave Chinnerb447fe52011-09-18 20:40:51 +00004792 int error;
4793
Dave Chinnerb447fe52011-09-18 20:40:51 +00004794 /* check if we need to do unwritten->real conversion */
4795 if (mval->br_state == XFS_EXT_UNWRITTEN &&
4796 (flags & XFS_BMAPI_PREALLOC))
4797 return 0;
4798
4799 /* check if we need to do real->unwritten conversion */
4800 if (mval->br_state == XFS_EXT_NORM &&
4801 (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) !=
4802 (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT))
4803 return 0;
4804
4805 /*
4806 * Modify (by adding) the state flag, if writing.
4807 */
4808 ASSERT(mval->br_blockcount <= len);
Dave Chinner29c8d172011-09-18 20:41:00 +00004809 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4810 bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp,
Dave Chinnerb447fe52011-09-18 20:40:51 +00004811 bma->ip, whichfork);
Dave Chinner29c8d172011-09-18 20:41:00 +00004812 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4813 bma->cur->bc_private.b.flist = bma->flist;
Dave Chinnerb447fe52011-09-18 20:40:51 +00004814 }
4815 mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN)
4816 ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
4817
Dave Chinnere0c3da52011-09-18 20:41:01 +00004818 error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx,
Christoph Hellwigc315c902011-09-18 20:41:02 +00004819 &bma->cur, mval, bma->firstblock, bma->flist,
4820 &tmp_logflags);
4821 bma->logflags |= tmp_logflags;
Dave Chinnerb447fe52011-09-18 20:40:51 +00004822 if (error)
4823 return error;
4824
4825 /*
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00004826 * Update our extent pointer, given that
4827 * xfs_bmap_add_extent_unwritten_real might have merged it into one
4828 * of the neighbouring ones.
Dave Chinnerb447fe52011-09-18 20:40:51 +00004829 */
Dave Chinnere0c3da52011-09-18 20:41:01 +00004830 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
Dave Chinnerb447fe52011-09-18 20:40:51 +00004831
4832 /*
4833 * We may have combined previously unwritten space with written space,
4834 * so generate another request.
4835 */
4836 if (mval->br_blockcount < len)
4837 return EAGAIN;
4838 return 0;
4839}
4840
Christoph Hellwig44032802011-09-18 20:40:48 +00004841/*
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004842 * Map file blocks to filesystem blocks, and allocate blocks or convert the
4843 * extent state if necessary. Details behaviour is controlled by the flags
4844 * parameter. Only allocates blocks from a single allocation group, to avoid
4845 * locking problems.
4846 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004847 * The returned value in "firstblock" from the first call in a transaction
4848 * must be remembered and presented to subsequent calls in "firstblock".
4849 * An upper bound for the number of blocks to be allocated is supplied to
4850 * the first call in "total"; if no allocation group has that many free
4851 * blocks then the call will fail (return NULLFSBLOCK in "firstblock").
4852 */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004853int
4854xfs_bmapi_write(
4855 struct xfs_trans *tp, /* transaction pointer */
4856 struct xfs_inode *ip, /* incore inode */
4857 xfs_fileoff_t bno, /* starting file offs. mapped */
4858 xfs_filblks_t len, /* length to map in file */
4859 int flags, /* XFS_BMAPI_... */
4860 xfs_fsblock_t *firstblock, /* first allocated block
4861 controls a.g. for allocs */
4862 xfs_extlen_t total, /* total blocks needed */
4863 struct xfs_bmbt_irec *mval, /* output: map values */
4864 int *nmap, /* i/o: mval size/count */
4865 struct xfs_bmap_free *flist) /* i/o: list extents to free */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004866{
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004867 struct xfs_mount *mp = ip->i_mount;
4868 struct xfs_ifork *ifp;
4869 struct xfs_bmalloca bma = { 0 }; /* args for xfs_bmap_alloc */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004870 xfs_fileoff_t end; /* end of mapped file region */
4871 int eof; /* after the end of extents */
4872 int error; /* error return */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004873 int n; /* current extent index */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004874 xfs_fileoff_t obno; /* old block number (offset) */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004875 int whichfork; /* data or attr fork */
4876 char inhole; /* current location is hole in file */
4877 char wasdelay; /* old extent was delayed */
4878
Linus Torvalds1da177e2005-04-16 15:20:36 -07004879#ifdef DEBUG
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004880 xfs_fileoff_t orig_bno; /* original block number value */
4881 int orig_flags; /* original flags arg value */
4882 xfs_filblks_t orig_len; /* original value of len arg */
4883 struct xfs_bmbt_irec *orig_mval; /* original value of mval */
4884 int orig_nmap; /* original value of *nmap */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004885
4886 orig_bno = bno;
4887 orig_len = len;
4888 orig_flags = flags;
4889 orig_mval = mval;
4890 orig_nmap = *nmap;
4891#endif
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004892
Linus Torvalds1da177e2005-04-16 15:20:36 -07004893 ASSERT(*nmap >= 1);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004894 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
4895 ASSERT(!(flags & XFS_BMAPI_IGSTATE));
4896 ASSERT(tp != NULL);
Dave Chinnera99ebf42011-12-01 11:24:20 +00004897 ASSERT(len > 0);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004898
Linus Torvalds1da177e2005-04-16 15:20:36 -07004899 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4900 XFS_ATTR_FORK : XFS_DATA_FORK;
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004901
Linus Torvalds1da177e2005-04-16 15:20:36 -07004902 if (unlikely(XFS_TEST_ERROR(
4903 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4904 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4905 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL),
4906 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004907 XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004908 return XFS_ERROR(EFSCORRUPTED);
4909 }
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004910
Linus Torvalds1da177e2005-04-16 15:20:36 -07004911 if (XFS_FORCED_SHUTDOWN(mp))
4912 return XFS_ERROR(EIO);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004913
Linus Torvalds1da177e2005-04-16 15:20:36 -07004914 ifp = XFS_IFORK_PTR(ip, whichfork);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004915
4916 XFS_STATS_INC(xs_blk_mapw);
4917
Linus Torvalds1da177e2005-04-16 15:20:36 -07004918 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004919 error = xfs_bmap_local_to_extents(tp, ip, firstblock, total,
Christoph Hellwigc315c902011-09-18 20:41:02 +00004920 &bma.logflags, whichfork);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004921 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004922 goto error0;
4923 }
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004924
4925 if (*firstblock == NULLFSBLOCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004926 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
Dave Chinner0937e0f2011-09-18 20:40:57 +00004927 bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004928 else
Dave Chinner0937e0f2011-09-18 20:40:57 +00004929 bma.minleft = 1;
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004930 } else {
Dave Chinner0937e0f2011-09-18 20:40:57 +00004931 bma.minleft = 0;
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004932 }
4933
4934 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4935 error = xfs_iread_extents(tp, ip, whichfork);
4936 if (error)
4937 goto error0;
4938 }
4939
Dave Chinnere0c3da52011-09-18 20:41:01 +00004940 xfs_bmap_search_extents(ip, bno, whichfork, &eof, &bma.idx, &bma.got,
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004941 &bma.prev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004942 n = 0;
4943 end = bno + len;
4944 obno = bno;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004945
4946 bma.tp = tp;
4947 bma.ip = ip;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004948 bma.total = total;
4949 bma.userdata = 0;
Dave Chinner0937e0f2011-09-18 20:40:57 +00004950 bma.flist = flist;
4951 bma.firstblock = firstblock;
Christoph Hellwigb4e91812010-06-23 18:11:15 +10004952
Linus Torvalds1da177e2005-04-16 15:20:36 -07004953 while (bno < end && n < *nmap) {
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004954 inhole = eof || bma.got.br_startoff > bno;
4955 wasdelay = !inhole && isnullstartblock(bma.got.br_startblock);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004956
Linus Torvalds1da177e2005-04-16 15:20:36 -07004957 /*
4958 * First, deal with the hole before the allocated space
4959 * that we found, if any.
4960 */
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004961 if (inhole || wasdelay) {
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004962 bma.eof = eof;
4963 bma.conv = !!(flags & XFS_BMAPI_CONVERT);
4964 bma.wasdel = wasdelay;
Dave Chinner3a756672011-09-18 20:40:58 +00004965 bma.offset = bno;
Dave Chinner1f3c7852012-10-05 11:06:59 +10004966 bma.flags = flags;
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004967
Dave Chinnera99ebf42011-12-01 11:24:20 +00004968 /*
4969 * There's a 32/64 bit type mismatch between the
4970 * allocation length request (which can be 64 bits in
4971 * length) and the bma length request, which is
4972 * xfs_extlen_t and therefore 32 bits. Hence we have to
4973 * check for 32-bit overflows and handle them here.
4974 */
4975 if (len > (xfs_filblks_t)MAXEXTLEN)
4976 bma.length = MAXEXTLEN;
4977 else
4978 bma.length = len;
4979
4980 ASSERT(len > 0);
4981 ASSERT(bma.length > 0);
Dave Chinner1f3c7852012-10-05 11:06:59 +10004982 error = xfs_bmapi_allocate(&bma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004983 if (error)
4984 goto error0;
Dave Chinner3a756672011-09-18 20:40:58 +00004985 if (bma.blkno == NULLFSBLOCK)
Dave Chinner7e47a4e2011-09-18 20:40:50 +00004986 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004987 }
Christoph Hellwig44032802011-09-18 20:40:48 +00004988
Dave Chinneraef9a892011-09-18 20:40:44 +00004989 /* Deal with the allocated space we found. */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00004990 xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno,
4991 end, n, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004992
Dave Chinnerb447fe52011-09-18 20:40:51 +00004993 /* Execute unwritten extent conversion if necessary */
Christoph Hellwigc315c902011-09-18 20:41:02 +00004994 error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00004995 if (error == EAGAIN)
4996 continue;
4997 if (error)
4998 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004999
Dave Chinneraef9a892011-09-18 20:40:44 +00005000 /* update the extent map to return */
5001 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
5002
Linus Torvalds1da177e2005-04-16 15:20:36 -07005003 /*
5004 * If we're done, stop now. Stop when we've allocated
5005 * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise
5006 * the transaction may get too big.
5007 */
Dave Chinnere0c3da52011-09-18 20:41:01 +00005008 if (bno >= end || n >= *nmap || bma.nallocs >= *nmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005009 break;
Dave Chinnerc0dc7822011-09-18 20:40:52 +00005010
5011 /* Else go on to the next record. */
Dave Chinnerbaf41a52011-09-18 20:40:56 +00005012 bma.prev = bma.got;
Dave Chinnere0c3da52011-09-18 20:41:01 +00005013 if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) {
5014 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx),
5015 &bma.got);
5016 } else
Christoph Hellwig5690f922011-05-11 15:04:07 +00005017 eof = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005018 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005019 *nmap = n;
Dave Chinnerc0dc7822011-09-18 20:40:52 +00005020
Linus Torvalds1da177e2005-04-16 15:20:36 -07005021 /*
5022 * Transform from btree to extents, give it cur.
5023 */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005024 if (xfs_bmap_wants_extents(ip, whichfork)) {
Christoph Hellwigc315c902011-09-18 20:41:02 +00005025 int tmp_logflags = 0;
5026
Dave Chinner29c8d172011-09-18 20:41:00 +00005027 ASSERT(bma.cur);
5028 error = xfs_bmap_btree_to_extents(tp, ip, bma.cur,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005029 &tmp_logflags, whichfork);
Christoph Hellwigc315c902011-09-18 20:41:02 +00005030 bma.logflags |= tmp_logflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005031 if (error)
5032 goto error0;
5033 }
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005034
Linus Torvalds1da177e2005-04-16 15:20:36 -07005035 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005036 XFS_IFORK_NEXTENTS(ip, whichfork) >
5037 XFS_IFORK_MAXEXT(ip, whichfork));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005038 error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005039error0:
5040 /*
5041 * Log everything. Do this after conversion, there's no point in
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005042 * logging the extent records if we've converted to btree format.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005043 */
Christoph Hellwigc315c902011-09-18 20:41:02 +00005044 if ((bma.logflags & xfs_ilog_fext(whichfork)) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005045 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
Christoph Hellwigc315c902011-09-18 20:41:02 +00005046 bma.logflags &= ~xfs_ilog_fext(whichfork);
5047 else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005048 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
Christoph Hellwigc315c902011-09-18 20:41:02 +00005049 bma.logflags &= ~xfs_ilog_fbroot(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005050 /*
5051 * Log whatever the flags say, even if error. Otherwise we might miss
5052 * detecting a case where the data is changed, there's an error,
5053 * and it's not logged so we don't shutdown when we should.
5054 */
Christoph Hellwigc315c902011-09-18 20:41:02 +00005055 if (bma.logflags)
5056 xfs_trans_log_inode(tp, ip, bma.logflags);
Dave Chinnerc0dc7822011-09-18 20:40:52 +00005057
Dave Chinner29c8d172011-09-18 20:41:00 +00005058 if (bma.cur) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005059 if (!error) {
5060 ASSERT(*firstblock == NULLFSBLOCK ||
5061 XFS_FSB_TO_AGNO(mp, *firstblock) ==
5062 XFS_FSB_TO_AGNO(mp,
Dave Chinner29c8d172011-09-18 20:41:00 +00005063 bma.cur->bc_private.b.firstblock) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07005064 (flist->xbf_low &&
5065 XFS_FSB_TO_AGNO(mp, *firstblock) <
5066 XFS_FSB_TO_AGNO(mp,
Dave Chinner29c8d172011-09-18 20:41:00 +00005067 bma.cur->bc_private.b.firstblock)));
5068 *firstblock = bma.cur->bc_private.b.firstblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005069 }
Dave Chinner29c8d172011-09-18 20:41:00 +00005070 xfs_btree_del_cursor(bma.cur,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005071 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5072 }
5073 if (!error)
5074 xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
5075 orig_nmap, *nmap);
5076 return error;
5077}
5078
5079/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005080 * Unmap (remove) blocks from a file.
5081 * If nexts is nonzero then the number of extents to remove is limited to
5082 * that value. If not all extents in the block range can be removed then
5083 * *done is set.
5084 */
5085int /* error */
5086xfs_bunmapi(
5087 xfs_trans_t *tp, /* transaction pointer */
5088 struct xfs_inode *ip, /* incore inode */
5089 xfs_fileoff_t bno, /* starting offset to unmap */
5090 xfs_filblks_t len, /* length to unmap in file */
5091 int flags, /* misc flags */
5092 xfs_extnum_t nexts, /* number of extents max */
5093 xfs_fsblock_t *firstblock, /* first allocated block
5094 controls a.g. for allocs */
5095 xfs_bmap_free_t *flist, /* i/o: list extents to free */
5096 int *done) /* set if not done yet */
5097{
5098 xfs_btree_cur_t *cur; /* bmap btree cursor */
5099 xfs_bmbt_irec_t del; /* extent being deleted */
5100 int eof; /* is deleting at eof */
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10005101 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005102 int error; /* error return value */
5103 xfs_extnum_t extno; /* extent number in list */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005104 xfs_bmbt_irec_t got; /* current extent record */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005105 xfs_ifork_t *ifp; /* inode fork pointer */
5106 int isrt; /* freeing in rt area */
5107 xfs_extnum_t lastx; /* last extent index used */
5108 int logflags; /* transaction logging flags */
5109 xfs_extlen_t mod; /* rt extent offset */
5110 xfs_mount_t *mp; /* mount structure */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005111 xfs_extnum_t nextents; /* number of file extents */
5112 xfs_bmbt_irec_t prev; /* previous extent record */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005113 xfs_fileoff_t start; /* first file offset deleted */
5114 int tmp_logflags; /* partial logging flags */
5115 int wasdel; /* was a delayed alloc extent */
5116 int whichfork; /* data or attribute fork */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005117 xfs_fsblock_t sum;
5118
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00005119 trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_);
5120
Linus Torvalds1da177e2005-04-16 15:20:36 -07005121 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
5122 XFS_ATTR_FORK : XFS_DATA_FORK;
5123 ifp = XFS_IFORK_PTR(ip, whichfork);
5124 if (unlikely(
5125 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
5126 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
5127 XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
5128 ip->i_mount);
5129 return XFS_ERROR(EFSCORRUPTED);
5130 }
5131 mp = ip->i_mount;
5132 if (XFS_FORCED_SHUTDOWN(mp))
5133 return XFS_ERROR(EIO);
Christoph Hellwig54893272011-05-11 15:04:03 +00005134
Linus Torvalds1da177e2005-04-16 15:20:36 -07005135 ASSERT(len > 0);
5136 ASSERT(nexts >= 0);
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005137
Linus Torvalds1da177e2005-04-16 15:20:36 -07005138 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5139 (error = xfs_iread_extents(tp, ip, whichfork)))
5140 return error;
5141 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5142 if (nextents == 0) {
5143 *done = 1;
5144 return 0;
5145 }
5146 XFS_STATS_INC(xs_blk_unmap);
Nathan Scottdd9f4382006-01-11 15:28:28 +11005147 isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005148 start = bno;
5149 bno = start + len - 1;
5150 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5151 &prev);
Christoph Hellwigb4e91812010-06-23 18:11:15 +10005152
Linus Torvalds1da177e2005-04-16 15:20:36 -07005153 /*
5154 * Check to see if the given block number is past the end of the
5155 * file, back up to the last block if so...
5156 */
5157 if (eof) {
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005158 ep = xfs_iext_get_ext(ifp, --lastx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005159 xfs_bmbt_get_all(ep, &got);
5160 bno = got.br_startoff + got.br_blockcount - 1;
5161 }
5162 logflags = 0;
5163 if (ifp->if_flags & XFS_IFBROOT) {
5164 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
Christoph Hellwig561f7d12008-10-30 16:53:59 +11005165 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005166 cur->bc_private.b.firstblock = *firstblock;
5167 cur->bc_private.b.flist = flist;
5168 cur->bc_private.b.flags = 0;
5169 } else
5170 cur = NULL;
Kamal Dasu5575acc2012-02-23 00:41:39 +00005171
5172 if (isrt) {
5173 /*
5174 * Synchronize by locking the bitmap inode.
5175 */
5176 xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
5177 xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL);
5178 }
5179
Linus Torvalds1da177e2005-04-16 15:20:36 -07005180 extno = 0;
5181 while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
5182 (nexts == 0 || extno < nexts)) {
5183 /*
5184 * Is the found extent after a hole in which bno lives?
5185 * Just back up to the previous extent, if so.
5186 */
5187 if (got.br_startoff > bno) {
5188 if (--lastx < 0)
5189 break;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005190 ep = xfs_iext_get_ext(ifp, lastx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005191 xfs_bmbt_get_all(ep, &got);
5192 }
5193 /*
5194 * Is the last block of this extent before the range
5195 * we're supposed to delete? If so, we're done.
5196 */
5197 bno = XFS_FILEOFF_MIN(bno,
5198 got.br_startoff + got.br_blockcount - 1);
5199 if (bno < start)
5200 break;
5201 /*
5202 * Then deal with the (possibly delayed) allocated space
5203 * we found.
5204 */
5205 ASSERT(ep != NULL);
5206 del = got;
Eric Sandeen9d87c312009-01-14 23:22:07 -06005207 wasdel = isnullstartblock(del.br_startblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005208 if (got.br_startoff < start) {
5209 del.br_startoff = start;
5210 del.br_blockcount -= start - got.br_startoff;
5211 if (!wasdel)
5212 del.br_startblock += start - got.br_startoff;
5213 }
5214 if (del.br_startoff + del.br_blockcount > bno + 1)
5215 del.br_blockcount = bno + 1 - del.br_startoff;
5216 sum = del.br_startblock + del.br_blockcount;
5217 if (isrt &&
5218 (mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
5219 /*
5220 * Realtime extent not lined up at the end.
5221 * The extent could have been split into written
5222 * and unwritten pieces, or we could just be
5223 * unmapping part of it. But we can't really
5224 * get rid of part of a realtime extent.
5225 */
5226 if (del.br_state == XFS_EXT_UNWRITTEN ||
Eric Sandeen62118702008-03-06 13:44:28 +11005227 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005228 /*
5229 * This piece is unwritten, or we're not
5230 * using unwritten extents. Skip over it.
5231 */
5232 ASSERT(bno >= mod);
5233 bno -= mod > del.br_blockcount ?
5234 del.br_blockcount : mod;
5235 if (bno < got.br_startoff) {
5236 if (--lastx >= 0)
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005237 xfs_bmbt_get_all(xfs_iext_get_ext(
5238 ifp, lastx), &got);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239 }
5240 continue;
5241 }
5242 /*
5243 * It's written, turn it unwritten.
5244 * This is better than zeroing it.
5245 */
5246 ASSERT(del.br_state == XFS_EXT_NORM);
5247 ASSERT(xfs_trans_get_block_res(tp) > 0);
5248 /*
5249 * If this spans a realtime extent boundary,
5250 * chop it back to the start of the one we end at.
5251 */
5252 if (del.br_blockcount > mod) {
5253 del.br_startoff += del.br_blockcount - mod;
5254 del.br_startblock += del.br_blockcount - mod;
5255 del.br_blockcount = mod;
5256 }
5257 del.br_state = XFS_EXT_UNWRITTEN;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00005258 error = xfs_bmap_add_extent_unwritten_real(tp, ip,
5259 &lastx, &cur, &del, firstblock, flist,
5260 &logflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005261 if (error)
5262 goto error0;
5263 goto nodelete;
5264 }
5265 if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
5266 /*
5267 * Realtime extent is lined up at the end but not
5268 * at the front. We'll get rid of full extents if
5269 * we can.
5270 */
5271 mod = mp->m_sb.sb_rextsize - mod;
5272 if (del.br_blockcount > mod) {
5273 del.br_blockcount -= mod;
5274 del.br_startoff += mod;
5275 del.br_startblock += mod;
5276 } else if ((del.br_startoff == start &&
5277 (del.br_state == XFS_EXT_UNWRITTEN ||
5278 xfs_trans_get_block_res(tp) == 0)) ||
Eric Sandeen62118702008-03-06 13:44:28 +11005279 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005280 /*
5281 * Can't make it unwritten. There isn't
5282 * a full extent here so just skip it.
5283 */
5284 ASSERT(bno >= del.br_blockcount);
5285 bno -= del.br_blockcount;
Christoph Hellwigf1c63b72011-05-11 15:04:09 +00005286 if (got.br_startoff > bno) {
5287 if (--lastx >= 0) {
5288 ep = xfs_iext_get_ext(ifp,
5289 lastx);
5290 xfs_bmbt_get_all(ep, &got);
5291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005292 }
5293 continue;
5294 } else if (del.br_state == XFS_EXT_UNWRITTEN) {
5295 /*
5296 * This one is already unwritten.
5297 * It must have a written left neighbor.
5298 * Unwrite the killed part of that one and
5299 * try again.
5300 */
5301 ASSERT(lastx > 0);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005302 xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
5303 lastx - 1), &prev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005304 ASSERT(prev.br_state == XFS_EXT_NORM);
Eric Sandeen9d87c312009-01-14 23:22:07 -06005305 ASSERT(!isnullstartblock(prev.br_startblock));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005306 ASSERT(del.br_startblock ==
5307 prev.br_startblock + prev.br_blockcount);
5308 if (prev.br_startoff < start) {
5309 mod = start - prev.br_startoff;
5310 prev.br_blockcount -= mod;
5311 prev.br_startblock += mod;
5312 prev.br_startoff = start;
5313 }
5314 prev.br_state = XFS_EXT_UNWRITTEN;
Christoph Hellwigec90c552011-05-23 08:52:53 +00005315 lastx--;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00005316 error = xfs_bmap_add_extent_unwritten_real(tp,
5317 ip, &lastx, &cur, &prev,
5318 firstblock, flist, &logflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005319 if (error)
5320 goto error0;
5321 goto nodelete;
5322 } else {
5323 ASSERT(del.br_state == XFS_EXT_NORM);
5324 del.br_state = XFS_EXT_UNWRITTEN;
Christoph Hellwiga5bd606b2011-09-18 20:40:54 +00005325 error = xfs_bmap_add_extent_unwritten_real(tp,
5326 ip, &lastx, &cur, &del,
5327 firstblock, flist, &logflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005328 if (error)
5329 goto error0;
5330 goto nodelete;
5331 }
5332 }
5333 if (wasdel) {
Eric Sandeen9d87c312009-01-14 23:22:07 -06005334 ASSERT(startblockval(del.br_startblock) > 0);
Nathan Scottdd9f4382006-01-11 15:28:28 +11005335 /* Update realtime/data freespace, unreserve quota */
Nathan Scott06d10dd2005-06-21 15:48:47 +10005336 if (isrt) {
5337 xfs_filblks_t rtexts;
5338
5339 rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
5340 do_div(rtexts, mp->m_sb.sb_rextsize);
5341 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
Christoph Hellwig54893272011-05-11 15:04:03 +00005342 (int64_t)rtexts, 0);
Christoph Hellwig7d095252009-06-08 15:33:32 +02005343 (void)xfs_trans_reserve_quota_nblks(NULL,
5344 ip, -((long)del.br_blockcount), 0,
Nathan Scott06d10dd2005-06-21 15:48:47 +10005345 XFS_QMOPT_RES_RTBLKS);
5346 } else {
Christoph Hellwig96540c72010-09-30 02:25:55 +00005347 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
Christoph Hellwig54893272011-05-11 15:04:03 +00005348 (int64_t)del.br_blockcount, 0);
Christoph Hellwig7d095252009-06-08 15:33:32 +02005349 (void)xfs_trans_reserve_quota_nblks(NULL,
5350 ip, -((long)del.br_blockcount), 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005351 XFS_QMOPT_RES_REGBLKS);
Nathan Scott06d10dd2005-06-21 15:48:47 +10005352 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005353 ip->i_delayed_blks -= del.br_blockcount;
5354 if (cur)
5355 cur->bc_private.b.flags |=
5356 XFS_BTCUR_BPRV_WASDEL;
5357 } else if (cur)
5358 cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
5359 /*
5360 * If it's the case where the directory code is running
5361 * with no block reservation, and the deleted block is in
5362 * the middle of its extent, and the resulting insert
5363 * of an extent would cause transformation to btree format,
5364 * then reject it. The calling code will then swap
5365 * blocks around instead.
5366 * We have to do this now, rather than waiting for the
5367 * conversion to btree format, since the transaction
5368 * will be dirty.
5369 */
5370 if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
5371 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005372 XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */
5373 XFS_IFORK_MAXEXT(ip, whichfork) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005374 del.br_startoff > got.br_startoff &&
5375 del.br_startoff + del.br_blockcount <
5376 got.br_startoff + got.br_blockcount) {
5377 error = XFS_ERROR(ENOSPC);
5378 goto error0;
5379 }
Christoph Hellwigec90c552011-05-23 08:52:53 +00005380 error = xfs_bmap_del_extent(ip, tp, &lastx, flist, cur, &del,
Christoph Hellwig54893272011-05-11 15:04:03 +00005381 &tmp_logflags, whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382 logflags |= tmp_logflags;
5383 if (error)
5384 goto error0;
5385 bno = del.br_startoff - 1;
5386nodelete:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005387 /*
5388 * If not done go on to the next (previous) record.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005389 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005390 if (bno != (xfs_fileoff_t)-1 && bno >= start) {
Christoph Hellwig00239ac2011-05-11 15:04:08 +00005391 if (lastx >= 0) {
5392 ep = xfs_iext_get_ext(ifp, lastx);
5393 if (xfs_bmbt_get_startoff(ep) > bno) {
5394 if (--lastx >= 0)
5395 ep = xfs_iext_get_ext(ifp,
5396 lastx);
5397 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005398 xfs_bmbt_get_all(ep, &got);
Christoph Hellwig00239ac2011-05-11 15:04:08 +00005399 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005400 extno++;
5401 }
5402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005403 *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005404
Linus Torvalds1da177e2005-04-16 15:20:36 -07005405 /*
5406 * Convert to a btree if necessary.
5407 */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005408 if (xfs_bmap_needs_btree(ip, whichfork)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005409 ASSERT(cur == NULL);
5410 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
5411 &cur, 0, &tmp_logflags, whichfork);
5412 logflags |= tmp_logflags;
5413 if (error)
5414 goto error0;
5415 }
5416 /*
5417 * transform from btree to extents, give it cur
5418 */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +00005419 else if (xfs_bmap_wants_extents(ip, whichfork)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005420 ASSERT(cur != NULL);
5421 error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
5422 whichfork);
5423 logflags |= tmp_logflags;
5424 if (error)
5425 goto error0;
5426 }
5427 /*
5428 * transform from extents to local?
5429 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005430 error = 0;
5431error0:
5432 /*
5433 * Log everything. Do this after conversion, there's no point in
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005434 * logging the extent records if we've converted to btree format.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005435 */
Eric Sandeen9d87c312009-01-14 23:22:07 -06005436 if ((logflags & xfs_ilog_fext(whichfork)) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005437 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
Eric Sandeen9d87c312009-01-14 23:22:07 -06005438 logflags &= ~xfs_ilog_fext(whichfork);
5439 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005440 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
Eric Sandeen9d87c312009-01-14 23:22:07 -06005441 logflags &= ~xfs_ilog_fbroot(whichfork);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005442 /*
5443 * Log inode even in the error case, if the transaction
5444 * is dirty we'll need to shut down the filesystem.
5445 */
5446 if (logflags)
5447 xfs_trans_log_inode(tp, ip, logflags);
5448 if (cur) {
5449 if (!error) {
5450 *firstblock = cur->bc_private.b.firstblock;
5451 cur->bc_private.b.allocated = 0;
5452 }
5453 xfs_btree_del_cursor(cur,
5454 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5455 }
5456 return error;
5457}
5458
5459/*
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005460 * returns 1 for success, 0 if we failed to map the extent.
5461 */
5462STATIC int
5463xfs_getbmapx_fix_eof_hole(
5464 xfs_inode_t *ip, /* xfs incore inode pointer */
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005465 struct getbmapx *out, /* output structure */
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005466 int prealloced, /* this is a file with
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005467 * preallocated data space */
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005468 __int64_t end, /* last block requested */
5469 xfs_fsblock_t startblock)
5470{
5471 __int64_t fixlen;
5472 xfs_mount_t *mp; /* file system mount point */
Eric Sandeen5af317c2008-11-28 14:23:35 +11005473 xfs_ifork_t *ifp; /* inode fork pointer */
5474 xfs_extnum_t lastx; /* last extent pointer */
5475 xfs_fileoff_t fileblock;
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005476
5477 if (startblock == HOLESTARTBLOCK) {
5478 mp = ip->i_mount;
5479 out->bmv_block = -1;
Christoph Hellwigce7ae1512011-12-18 20:00:11 +00005480 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, XFS_ISIZE(ip)));
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005481 fixlen -= out->bmv_offset;
5482 if (prealloced && out->bmv_offset + out->bmv_length == end) {
5483 /* Came to hole at EOF. Trim it. */
5484 if (fixlen <= 0)
5485 return 0;
5486 out->bmv_length = fixlen;
5487 }
5488 } else {
Eric Sandeen5af317c2008-11-28 14:23:35 +11005489 if (startblock == DELAYSTARTBLOCK)
5490 out->bmv_block = -2;
5491 else
Eric Sandeen9d87c312009-01-14 23:22:07 -06005492 out->bmv_block = xfs_fsb_to_db(ip, startblock);
Eric Sandeen5af317c2008-11-28 14:23:35 +11005493 fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
5494 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
5495 if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
5496 (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
5497 out->bmv_oflags |= BMV_OF_LAST;
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005498 }
5499
5500 return 1;
5501}
5502
5503/*
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005504 * Get inode's extents as described in bmv, and format for output.
5505 * Calls formatter to fill the user's buffer until all extents
5506 * are mapped, until the passed-in bmv->bmv_count slots have
5507 * been filled, or until the formatter short-circuits the loop,
5508 * if it is tracking filled-in extents on its own.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005509 */
5510int /* error code */
5511xfs_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10005512 xfs_inode_t *ip,
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005513 struct getbmapx *bmv, /* user bmap structure */
5514 xfs_bmap_format_t formatter, /* format to user */
5515 void *arg) /* formatter arg */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005516{
5517 __int64_t bmvend; /* last block requested */
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005518 int error = 0; /* return value */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005519 __int64_t fixlen; /* length for -1 case */
5520 int i; /* extent number */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005521 int lock; /* lock state */
5522 xfs_bmbt_irec_t *map; /* buffer for user's data */
5523 xfs_mount_t *mp; /* file system mount point */
5524 int nex; /* # of user extents can do */
5525 int nexleft; /* # of user extents left */
5526 int subnex; /* # of bmapi's can do */
5527 int nmap; /* number of map entries */
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005528 struct getbmapx *out; /* output structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005529 int whichfork; /* data or attr fork */
5530 int prealloced; /* this is a file with
5531 * preallocated data space */
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005532 int iflags; /* interface flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005533 int bmapi_flags; /* flags for xfs_bmapi */
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005534 int cur_ext = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005535
Linus Torvalds1da177e2005-04-16 15:20:36 -07005536 mp = ip->i_mount;
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005537 iflags = bmv->bmv_iflags;
Eric Sandeen8a7141a2008-11-28 14:23:35 +11005538 whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005539
Linus Torvalds1da177e2005-04-16 15:20:36 -07005540 if (whichfork == XFS_ATTR_FORK) {
5541 if (XFS_IFORK_Q(ip)) {
5542 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
5543 ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
5544 ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
5545 return XFS_ERROR(EINVAL);
5546 } else if (unlikely(
5547 ip->i_d.di_aformat != 0 &&
5548 ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
5549 XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
5550 ip->i_mount);
5551 return XFS_ERROR(EFSCORRUPTED);
5552 }
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005553
5554 prealloced = 0;
5555 fixlen = 1LL << 32;
5556 } else {
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005557 if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
5558 ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
5559 ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
5560 return XFS_ERROR(EINVAL);
5561
David Chinner957d0eb2007-06-18 16:50:37 +10005562 if (xfs_get_extsz_hint(ip) ||
Nathan Scottdd9f4382006-01-11 15:28:28 +11005563 ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
Linus Torvalds1da177e2005-04-16 15:20:36 -07005564 prealloced = 1;
Dave Chinner32972382012-06-08 15:44:54 +10005565 fixlen = mp->m_super->s_maxbytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005566 } else {
5567 prealloced = 0;
Christoph Hellwigce7ae1512011-12-18 20:00:11 +00005568 fixlen = XFS_ISIZE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005569 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005570 }
5571
5572 if (bmv->bmv_length == -1) {
5573 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005574 bmv->bmv_length =
5575 max_t(__int64_t, fixlen - bmv->bmv_offset, 0);
5576 } else if (bmv->bmv_length == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005577 bmv->bmv_entries = 0;
5578 return 0;
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005579 } else if (bmv->bmv_length < 0) {
5580 return XFS_ERROR(EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005581 }
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005582
Linus Torvalds1da177e2005-04-16 15:20:36 -07005583 nex = bmv->bmv_count - 1;
5584 if (nex <= 0)
5585 return XFS_ERROR(EINVAL);
5586 bmvend = bmv->bmv_offset + bmv->bmv_length;
5587
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005588
5589 if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
5590 return XFS_ERROR(ENOMEM);
5591 out = kmem_zalloc(bmv->bmv_count * sizeof(struct getbmapx), KM_MAYFAIL);
Dave Chinnerf0742112012-03-07 04:50:22 +00005592 if (!out) {
5593 out = kmem_zalloc_large(bmv->bmv_count *
5594 sizeof(struct getbmapx));
5595 if (!out)
5596 return XFS_ERROR(ENOMEM);
5597 }
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005598
Linus Torvalds1da177e2005-04-16 15:20:36 -07005599 xfs_ilock(ip, XFS_IOLOCK_SHARED);
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005600 if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) {
Christoph Hellwigce7ae1512011-12-18 20:00:11 +00005601 if (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size) {
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005602 error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF);
5603 if (error)
5604 goto out_unlock_iolock;
Niv Sardie12070a2008-03-06 13:43:03 +11005605 }
Dave Chinner309c8482010-11-30 15:16:02 +11005606 /*
5607 * even after flushing the inode, there can still be delalloc
5608 * blocks on the inode beyond EOF due to speculative
5609 * preallocation. These are not removed until the release
5610 * function is called or the inode is inactivated. Hence we
5611 * cannot assert here that ip->i_delayed_blks == 0.
5612 */
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005613 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005614
5615 lock = xfs_ilock_map_shared(ip);
5616
5617 /*
5618 * Don't let nex be bigger than the number of extents
5619 * we can have assuming alternating holes and real extents.
5620 */
5621 if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
5622 nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
5623
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005624 bmapi_flags = xfs_bmapi_aflag(whichfork);
5625 if (!(iflags & BMV_IF_PREALLOC))
5626 bmapi_flags |= XFS_BMAPI_IGSTATE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005627
5628 /*
5629 * Allocate enough space to handle "subnex" maps at a time.
5630 */
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005631 error = ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005632 subnex = 16;
Christoph Hellwigca35dcd2009-07-18 18:14:54 -04005633 map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005634 if (!map)
5635 goto out_unlock_ilock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005636
5637 bmv->bmv_entries = 0;
5638
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005639 if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 &&
5640 (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) {
5641 error = 0;
5642 goto out_free_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005643 }
5644
5645 nexleft = nex;
5646
5647 do {
5648 nmap = (nexleft > subnex) ? subnex : nexleft;
Dave Chinner5c8ed202011-09-18 20:40:45 +00005649 error = xfs_bmapi_read(ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
5650 XFS_BB_TO_FSB(mp, bmv->bmv_length),
5651 map, &nmap, bmapi_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005652 if (error)
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005653 goto out_free_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005654 ASSERT(nmap <= subnex);
5655
5656 for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005657 out[cur_ext].bmv_oflags = 0;
Eric Sandeen5af317c2008-11-28 14:23:35 +11005658 if (map[i].br_state == XFS_EXT_UNWRITTEN)
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005659 out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC;
Eric Sandeen5af317c2008-11-28 14:23:35 +11005660 else if (map[i].br_startblock == DELAYSTARTBLOCK)
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005661 out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC;
5662 out[cur_ext].bmv_offset =
5663 XFS_FSB_TO_BB(mp, map[i].br_startoff);
5664 out[cur_ext].bmv_length =
5665 XFS_FSB_TO_BB(mp, map[i].br_blockcount);
5666 out[cur_ext].bmv_unused1 = 0;
5667 out[cur_ext].bmv_unused2 = 0;
Dave Chinner58e20772012-04-29 21:16:17 +10005668
5669 /*
5670 * delayed allocation extents that start beyond EOF can
5671 * occur due to speculative EOF allocation when the
5672 * delalloc extent is larger than the largest freespace
5673 * extent at conversion time. These extents cannot be
5674 * converted by data writeback, so can exist here even
5675 * if we are not supposed to be finding delalloc
5676 * extents.
5677 */
5678 if (map[i].br_startblock == DELAYSTARTBLOCK &&
5679 map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
5680 ASSERT((iflags & BMV_IF_DELALLOC) != 0);
5681
Yingping Lu9af0a702005-11-02 15:09:54 +11005682 if (map[i].br_startblock == HOLESTARTBLOCK &&
Vlad Apostolov3bacbcd2007-08-16 15:20:25 +10005683 whichfork == XFS_ATTR_FORK) {
5684 /* came to the end of attribute fork */
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005685 out[cur_ext].bmv_oflags |= BMV_OF_LAST;
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005686 goto out_free_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005687 }
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005688
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005689 if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext],
5690 prealloced, bmvend,
5691 map[i].br_startblock))
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005692 goto out_free_map;
5693
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005694 bmv->bmv_offset =
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005695 out[cur_ext].bmv_offset +
5696 out[cur_ext].bmv_length;
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005697 bmv->bmv_length =
5698 max_t(__int64_t, 0, bmvend - bmv->bmv_offset);
Tao Ma9af25462010-08-30 02:44:03 +00005699
5700 /*
5701 * In case we don't want to return the hole,
5702 * don't increase cur_ext so that we can reuse
5703 * it in the next loop.
5704 */
5705 if ((iflags & BMV_IF_NO_HOLES) &&
5706 map[i].br_startblock == HOLESTARTBLOCK) {
5707 memset(&out[cur_ext], 0, sizeof(out[cur_ext]));
5708 continue;
5709 }
5710
5711 nexleft--;
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005712 bmv->bmv_entries++;
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005713 cur_ext++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005714 }
5715 } while (nmap && nexleft && bmv->bmv_length);
5716
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005717 out_free_map:
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10005718 kmem_free(map);
Christoph Hellwig4be4a002009-04-29 10:50:48 -04005719 out_unlock_ilock:
5720 xfs_iunlock_map_shared(ip, lock);
5721 out_unlock_iolock:
5722 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
Christoph Hellwig6321e3e2009-02-24 08:39:02 -05005723
5724 for (i = 0; i < cur_ext; i++) {
5725 int full = 0; /* user array is full */
5726
5727 /* format results & advance arg */
5728 error = formatter(&arg, &out[i], &full);
5729 if (error || full)
5730 break;
5731 }
5732
Dave Chinnerf0742112012-03-07 04:50:22 +00005733 if (is_vmalloc_addr(out))
5734 kmem_free_large(out);
5735 else
5736 kmem_free(out);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005737 return error;
5738}
5739
Linus Torvalds1da177e2005-04-16 15:20:36 -07005740#ifdef DEBUG
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005741STATIC struct xfs_buf *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005742xfs_bmap_get_bp(
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005743 struct xfs_btree_cur *cur,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005744 xfs_fsblock_t bno)
5745{
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005746 struct xfs_log_item_desc *lidp;
5747 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005748
5749 if (!cur)
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005750 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005751
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005752 for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
5753 if (!cur->bc_bufs[i])
5754 break;
5755 if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno)
5756 return cur->bc_bufs[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07005757 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005758
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005759 /* Chase down all the log items to see if the bp is there */
5760 list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) {
Christoph Hellwige98c4142010-06-23 18:11:15 +10005761 struct xfs_buf_log_item *bip;
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005762 bip = (struct xfs_buf_log_item *)lidp->lid_item;
5763 if (bip->bli_item.li_type == XFS_LI_BUF &&
5764 XFS_BUF_ADDR(bip->bli_buf) == bno)
5765 return bip->bli_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005766 }
Christoph Hellwige98c4142010-06-23 18:11:15 +10005767
Christoph Hellwigecd7f082010-07-22 12:52:08 +10005768 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005769}
5770
Hannes Eder3180e662009-03-04 19:34:10 +01005771STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -07005772xfs_check_block(
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005773 struct xfs_btree_block *block,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005774 xfs_mount_t *mp,
5775 int root,
5776 short sz)
5777{
5778 int i, j, dmxr;
Christoph Hellwig576039c2006-09-28 10:58:06 +10005779 __be64 *pp, *thispa; /* pointer to block address */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005780 xfs_bmbt_key_t *prevp, *keyp;
5781
Christoph Hellwig16259e72005-11-02 15:11:25 +11005782 ASSERT(be16_to_cpu(block->bb_level) > 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005783
5784 prevp = NULL;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005785 for( i = 1; i <= xfs_btree_get_numrecs(block); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005786 dmxr = mp->m_bmap_dmxr[0];
Christoph Hellwig136341b2008-10-30 17:11:40 +11005787 keyp = XFS_BMBT_KEY_ADDR(mp, block, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005788
5789 if (prevp) {
Christoph Hellwig4a26e662008-10-30 16:58:32 +11005790 ASSERT(be64_to_cpu(prevp->br_startoff) <
5791 be64_to_cpu(keyp->br_startoff));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005792 }
5793 prevp = keyp;
5794
5795 /*
5796 * Compare the block numbers to see if there are dups.
5797 */
Christoph Hellwig136341b2008-10-30 17:11:40 +11005798 if (root)
Christoph Hellwig60197e82008-10-30 17:11:19 +11005799 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz);
Christoph Hellwig136341b2008-10-30 17:11:40 +11005800 else
5801 pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr);
5802
Christoph Hellwig16259e72005-11-02 15:11:25 +11005803 for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
Christoph Hellwig136341b2008-10-30 17:11:40 +11005804 if (root)
Christoph Hellwig60197e82008-10-30 17:11:19 +11005805 thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz);
Christoph Hellwig136341b2008-10-30 17:11:40 +11005806 else
5807 thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr);
Christoph Hellwig576039c2006-09-28 10:58:06 +10005808 if (*thispa == *pp) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11005809 xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld",
Harvey Harrison34a622b2008-04-10 12:19:21 +10005810 __func__, j, i,
Christoph Hellwig576039c2006-09-28 10:58:06 +10005811 (unsigned long long)be64_to_cpu(*thispa));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005812 panic("%s: ptrs are equal in node\n",
Harvey Harrison34a622b2008-04-10 12:19:21 +10005813 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005814 }
5815 }
5816 }
5817}
5818
5819/*
5820 * Check that the extents for the inode ip are in the right order in all
5821 * btree leaves.
5822 */
5823
5824STATIC void
5825xfs_bmap_check_leaf_extents(
5826 xfs_btree_cur_t *cur, /* btree cursor or null */
5827 xfs_inode_t *ip, /* incore inode pointer */
5828 int whichfork) /* data or attr fork */
5829{
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005830 struct xfs_btree_block *block; /* current btree block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005831 xfs_fsblock_t bno; /* block # of "block" */
5832 xfs_buf_t *bp; /* buffer for "block" */
5833 int error; /* error return value */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005834 xfs_extnum_t i=0, j; /* index into the extents list */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005835 xfs_ifork_t *ifp; /* fork structure */
5836 int level; /* btree level, for checking */
5837 xfs_mount_t *mp; /* file system mount structure */
Christoph Hellwig576039c2006-09-28 10:58:06 +10005838 __be64 *pp; /* pointer to block address */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005839 xfs_bmbt_rec_t *ep; /* pointer to current extent */
Lachlan McIlroy2abdb8c2008-03-27 18:01:14 +11005840 xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005841 xfs_bmbt_rec_t *nextp; /* pointer to next extent */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005842 int bp_release = 0;
5843
5844 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
5845 return;
5846 }
5847
5848 bno = NULLFSBLOCK;
5849 mp = ip->i_mount;
5850 ifp = XFS_IFORK_PTR(ip, whichfork);
5851 block = ifp->if_broot;
5852 /*
5853 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
5854 */
Christoph Hellwig16259e72005-11-02 15:11:25 +11005855 level = be16_to_cpu(block->bb_level);
5856 ASSERT(level > 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005857 xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
Christoph Hellwig60197e82008-10-30 17:11:19 +11005858 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
Christoph Hellwig576039c2006-09-28 10:58:06 +10005859 bno = be64_to_cpu(*pp);
5860
5861 ASSERT(bno != NULLDFSBNO);
5862 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
5863 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
5864
Linus Torvalds1da177e2005-04-16 15:20:36 -07005865 /*
5866 * Go down the tree until leaf level is reached, following the first
5867 * pointer (leftmost) at each level.
5868 */
5869 while (level-- > 0) {
5870 /* See if buf is in cur first */
5871 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
5872 if (bp) {
5873 bp_release = 0;
5874 } else {
5875 bp_release = 1;
5876 }
5877 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
5878 XFS_BMAP_BTREE_REF)))
5879 goto error_norelse;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005880 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005881 XFS_WANT_CORRUPTED_GOTO(
Christoph Hellwig4e8938f2008-10-30 17:14:43 +11005882 xfs_bmap_sanity_check(mp, bp, level),
Linus Torvalds1da177e2005-04-16 15:20:36 -07005883 error0);
5884 if (level == 0)
5885 break;
5886
5887 /*
5888 * Check this block for basic sanity (increasing keys and
5889 * no duplicate blocks).
5890 */
5891
5892 xfs_check_block(block, mp, 0, 0);
Christoph Hellwig136341b2008-10-30 17:11:40 +11005893 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
Christoph Hellwig576039c2006-09-28 10:58:06 +10005894 bno = be64_to_cpu(*pp);
5895 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005896 if (bp_release) {
5897 bp_release = 0;
5898 xfs_trans_brelse(NULL, bp);
5899 }
5900 }
5901
5902 /*
5903 * Here with bp and block set to the leftmost leaf node in the tree.
5904 */
5905 i = 0;
5906
5907 /*
5908 * Loop over all leaf nodes checking that all extents are in the right order.
5909 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005910 for (;;) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005911 xfs_fsblock_t nextbno;
5912 xfs_extnum_t num_recs;
5913
5914
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005915 num_recs = xfs_btree_get_numrecs(block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005916
5917 /*
5918 * Read-ahead the next leaf block, if any.
5919 */
5920
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005921 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005922
5923 /*
5924 * Check all the extents to make sure they are OK.
5925 * If we had a previous block, the last entry should
5926 * conform with the first entry in this one.
5927 */
5928
Christoph Hellwig136341b2008-10-30 17:11:40 +11005929 ep = XFS_BMBT_REC_ADDR(mp, block, 1);
Lachlan McIlroy2abdb8c2008-03-27 18:01:14 +11005930 if (i) {
Christoph Hellwig4a26e662008-10-30 16:58:32 +11005931 ASSERT(xfs_bmbt_disk_get_startoff(&last) +
5932 xfs_bmbt_disk_get_blockcount(&last) <=
5933 xfs_bmbt_disk_get_startoff(ep));
Lachlan McIlroy2abdb8c2008-03-27 18:01:14 +11005934 }
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005935 for (j = 1; j < num_recs; j++) {
Christoph Hellwig136341b2008-10-30 17:11:40 +11005936 nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1);
Christoph Hellwig4a26e662008-10-30 16:58:32 +11005937 ASSERT(xfs_bmbt_disk_get_startoff(ep) +
5938 xfs_bmbt_disk_get_blockcount(ep) <=
5939 xfs_bmbt_disk_get_startoff(nextp));
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11005940 ep = nextp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005941 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005942
Lachlan McIlroy2abdb8c2008-03-27 18:01:14 +11005943 last = *ep;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005944 i += num_recs;
5945 if (bp_release) {
5946 bp_release = 0;
5947 xfs_trans_brelse(NULL, bp);
5948 }
5949 bno = nextbno;
5950 /*
5951 * If we've reached the end, stop.
5952 */
5953 if (bno == NULLFSBLOCK)
5954 break;
5955
5956 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
5957 if (bp) {
5958 bp_release = 0;
5959 } else {
5960 bp_release = 1;
5961 }
5962 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
5963 XFS_BMAP_BTREE_REF)))
5964 goto error_norelse;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005965 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005966 }
5967 if (bp_release) {
5968 bp_release = 0;
5969 xfs_trans_brelse(NULL, bp);
5970 }
5971 return;
5972
5973error0:
Dave Chinner0b932cc2011-03-07 10:08:35 +11005974 xfs_warn(mp, "%s: at error0", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005975 if (bp_release)
5976 xfs_trans_brelse(NULL, bp);
5977error_norelse:
Dave Chinner0b932cc2011-03-07 10:08:35 +11005978 xfs_warn(mp, "%s: BAD after btree leaves for %d extents",
Harvey Harrison34a622b2008-04-10 12:19:21 +10005979 __func__, i);
5980 panic("%s: CORRUPTED BTREE OR SOMETHING", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005981 return;
5982}
5983#endif
5984
5985/*
5986 * Count fsblocks of the given fork.
5987 */
5988int /* error */
5989xfs_bmap_count_blocks(
5990 xfs_trans_t *tp, /* transaction pointer */
5991 xfs_inode_t *ip, /* incore inode */
5992 int whichfork, /* data or attr fork */
5993 int *count) /* out: count of blocks */
5994{
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11005995 struct xfs_btree_block *block; /* current btree block */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005996 xfs_fsblock_t bno; /* block # of "block" */
5997 xfs_ifork_t *ifp; /* fork structure */
5998 int level; /* btree level, for checking */
5999 xfs_mount_t *mp; /* file system mount structure */
Christoph Hellwig576039c2006-09-28 10:58:06 +10006000 __be64 *pp; /* pointer to block address */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006001
6002 bno = NULLFSBLOCK;
6003 mp = ip->i_mount;
6004 ifp = XFS_IFORK_PTR(ip, whichfork);
6005 if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
Ruben Porrasc94312d2008-08-13 16:52:25 +10006006 xfs_bmap_count_leaves(ifp, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07006007 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
Ruben Porrasc94312d2008-08-13 16:52:25 +10006008 count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006009 return 0;
6010 }
6011
6012 /*
6013 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
6014 */
6015 block = ifp->if_broot;
Christoph Hellwig16259e72005-11-02 15:11:25 +11006016 level = be16_to_cpu(block->bb_level);
6017 ASSERT(level > 0);
Christoph Hellwig60197e82008-10-30 17:11:19 +11006018 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
Christoph Hellwig576039c2006-09-28 10:58:06 +10006019 bno = be64_to_cpu(*pp);
6020 ASSERT(bno != NULLDFSBNO);
6021 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
6022 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006023
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006024 if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006025 XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
6026 mp);
6027 return XFS_ERROR(EFSCORRUPTED);
6028 }
6029
6030 return 0;
6031}
6032
6033/*
6034 * Recursively walks each level of a btree
6035 * to count total fsblocks is use.
6036 */
David Chinnera8272ce2007-11-23 16:28:09 +11006037STATIC int /* error */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006038xfs_bmap_count_tree(
6039 xfs_mount_t *mp, /* file system mount point */
6040 xfs_trans_t *tp, /* transaction pointer */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006041 xfs_ifork_t *ifp, /* inode fork pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006042 xfs_fsblock_t blockno, /* file system block number */
6043 int levelin, /* level in btree */
6044 int *count) /* Count of blocks */
6045{
6046 int error;
6047 xfs_buf_t *bp, *nbp;
6048 int level = levelin;
Christoph Hellwig576039c2006-09-28 10:58:06 +10006049 __be64 *pp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006050 xfs_fsblock_t bno = blockno;
6051 xfs_fsblock_t nextbno;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006052 struct xfs_btree_block *block, *nextblock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006053 int numrecs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006054
6055 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
6056 return error;
6057 *count += 1;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006058 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006059
6060 if (--level) {
Malcolm Parsons9da096f2009-03-29 09:55:42 +02006061 /* Not at node above leaves, count this level of nodes */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006062 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006063 while (nextbno != NULLFSBLOCK) {
6064 if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
6065 0, &nbp, XFS_BMAP_BTREE_REF)))
6066 return error;
6067 *count += 1;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006068 nextblock = XFS_BUF_TO_BLOCK(nbp);
6069 nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006070 xfs_trans_brelse(tp, nbp);
6071 }
6072
6073 /* Dive to the next level */
Christoph Hellwig136341b2008-10-30 17:11:40 +11006074 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
Christoph Hellwig576039c2006-09-28 10:58:06 +10006075 bno = be64_to_cpu(*pp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006076 if (unlikely((error =
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006077 xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006078 xfs_trans_brelse(tp, bp);
6079 XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
6080 XFS_ERRLEVEL_LOW, mp);
6081 return XFS_ERROR(EFSCORRUPTED);
6082 }
6083 xfs_trans_brelse(tp, bp);
6084 } else {
6085 /* count all level 1 nodes and their leaves */
6086 for (;;) {
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006087 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
Christoph Hellwig16259e72005-11-02 15:11:25 +11006088 numrecs = be16_to_cpu(block->bb_numrecs);
Christoph Hellwig136341b2008-10-30 17:11:40 +11006089 xfs_bmap_disk_count_leaves(mp, block, numrecs, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006090 xfs_trans_brelse(tp, bp);
6091 if (nextbno == NULLFSBLOCK)
6092 break;
6093 bno = nextbno;
6094 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
6095 XFS_BMAP_BTREE_REF)))
6096 return error;
6097 *count += 1;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006098 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006099 }
6100 }
6101 return 0;
6102}
6103
6104/*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006105 * Count leaf blocks given a range of extent records.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006106 */
Ruben Porrasc94312d2008-08-13 16:52:25 +10006107STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -07006108xfs_bmap_count_leaves(
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006109 xfs_ifork_t *ifp,
6110 xfs_extnum_t idx,
Linus Torvalds1da177e2005-04-16 15:20:36 -07006111 int numrecs,
6112 int *count)
6113{
6114 int b;
6115
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006116 for (b = 0; b < numrecs; b++) {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10006117 xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
Yingping Lu91e11082005-11-02 15:10:24 +11006118 *count += xfs_bmbt_get_blockcount(frp);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006119 }
Yingping Lu91e11082005-11-02 15:10:24 +11006120}
6121
6122/*
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006123 * Count leaf blocks given a range of extent records originally
6124 * in btree format.
Yingping Lu91e11082005-11-02 15:10:24 +11006125 */
Ruben Porrasc94312d2008-08-13 16:52:25 +10006126STATIC void
Yingping Lu91e11082005-11-02 15:10:24 +11006127xfs_bmap_disk_count_leaves(
Christoph Hellwig136341b2008-10-30 17:11:40 +11006128 struct xfs_mount *mp,
Christoph Hellwig7cc95a82008-10-30 17:14:34 +11006129 struct xfs_btree_block *block,
Yingping Lu91e11082005-11-02 15:10:24 +11006130 int numrecs,
6131 int *count)
6132{
6133 int b;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006134 xfs_bmbt_rec_t *frp;
Yingping Lu91e11082005-11-02 15:10:24 +11006135
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006136 for (b = 1; b <= numrecs; b++) {
Christoph Hellwig136341b2008-10-30 17:11:40 +11006137 frp = XFS_BMBT_REC_ADDR(mp, block, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006138 *count += xfs_bmbt_disk_get_blockcount(frp);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11006139 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006140}
Dave Chinnerc726de42010-11-30 15:14:39 +11006141
6142/*
6143 * dead simple method of punching delalyed allocation blocks from a range in
6144 * the inode. Walks a block at a time so will be slow, but is only executed in
6145 * rare error cases so the overhead is not critical. This will alays punch out
6146 * both the start and end blocks, even if the ranges only partially overlap
6147 * them, so it is up to the caller to ensure that partial blocks are not
6148 * passed in.
6149 */
6150int
6151xfs_bmap_punch_delalloc_range(
6152 struct xfs_inode *ip,
6153 xfs_fileoff_t start_fsb,
6154 xfs_fileoff_t length)
6155{
6156 xfs_fileoff_t remaining = length;
6157 int error = 0;
6158
6159 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
6160
6161 do {
6162 int done;
6163 xfs_bmbt_irec_t imap;
6164 int nimaps = 1;
6165 xfs_fsblock_t firstblock;
6166 xfs_bmap_free_t flist;
6167
6168 /*
6169 * Map the range first and check that it is a delalloc extent
6170 * before trying to unmap the range. Otherwise we will be
6171 * trying to remove a real extent (which requires a
6172 * transaction) or a hole, which is probably a bad idea...
6173 */
Dave Chinner5c8ed202011-09-18 20:40:45 +00006174 error = xfs_bmapi_read(ip, start_fsb, 1, &imap, &nimaps,
6175 XFS_BMAPI_ENTIRE);
Dave Chinnerc726de42010-11-30 15:14:39 +11006176
6177 if (error) {
6178 /* something screwed, just bail */
6179 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
Dave Chinner53487782011-03-07 10:05:35 +11006180 xfs_alert(ip->i_mount,
Dave Chinnerc726de42010-11-30 15:14:39 +11006181 "Failed delalloc mapping lookup ino %lld fsb %lld.",
6182 ip->i_ino, start_fsb);
6183 }
6184 break;
6185 }
6186 if (!nimaps) {
6187 /* nothing there */
6188 goto next_block;
6189 }
6190 if (imap.br_startblock != DELAYSTARTBLOCK) {
6191 /* been converted, ignore */
6192 goto next_block;
6193 }
6194 WARN_ON(imap.br_blockcount == 0);
6195
6196 /*
6197 * Note: while we initialise the firstblock/flist pair, they
6198 * should never be used because blocks should never be
6199 * allocated or freed for a delalloc extent and hence we need
6200 * don't cancel or finish them after the xfs_bunmapi() call.
6201 */
6202 xfs_bmap_init(&flist, &firstblock);
6203 error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock,
6204 &flist, &done);
6205 if (error)
6206 break;
6207
6208 ASSERT(!flist.xbf_count && !flist.xbf_first);
6209next_block:
6210 start_fsb++;
6211 remaining--;
6212 } while(remaining > 0);
6213
6214 return error;
6215}
Dave Chinnerfd500922012-04-23 15:59:01 +10006216
6217/*
6218 * Convert the given file system block to a disk block. We have to treat it
6219 * differently based on whether the file is a real time file or not, because the
6220 * bmap code does.
6221 */
6222xfs_daddr_t
6223xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
6224{
6225 return (XFS_IS_REALTIME_INODE(ip) ? \
6226 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
6227 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
6228}