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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * 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"
Dave Chinner70a9883c2013-10-23 10:36:05 +110020#include "xfs_shared.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110021#include "xfs_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110022#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_inode.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110029#include "xfs_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_ialloc.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110031#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_itable.h"
33#include "xfs_error.h"
Christoph Hellwigf2d67612010-06-24 11:52:50 +100034#include "xfs_trace.h"
Dave Chinner33479e02012-10-08 21:56:11 +110035#include "xfs_icache.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110036#include "xfs_dinode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Eric Sandeend96f8f82009-07-02 00:09:33 -050038STATIC int
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100039xfs_internal_inum(
40 xfs_mount_t *mp,
41 xfs_ino_t ino)
42{
43 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
Eric Sandeen62118702008-03-06 13:44:28 +110044 (xfs_sb_version_hasquota(&mp->m_sb) &&
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -050045 xfs_is_quota_inode(&mp->m_sb, ino)));
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100046}
47
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100048/*
49 * Return stat information for one inode.
50 * Return 0 if ok, else errno.
51 */
52int
53xfs_bulkstat_one_int(
54 struct xfs_mount *mp, /* mount point for filesystem */
55 xfs_ino_t ino, /* inode to get data for */
56 void __user *buffer, /* buffer to place output in */
57 int ubsize, /* size of buffer */
58 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100059 int *ubused, /* bytes used by me */
60 int *stat) /* BULKSTAT_RV_... */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100062 struct xfs_icdinode *dic; /* dinode core info pointer */
63 struct xfs_inode *ip; /* incore inode pointer */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100064 struct xfs_bstat *buf; /* return buffer */
65 int error = 0; /* error value */
66
67 *stat = BULKSTAT_RV_NOTHING;
68
69 if (!buffer || xfs_internal_inum(mp, ino))
Dave Chinner24513372014-06-25 14:58:08 +100070 return -EINVAL;
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100071
72 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
73 if (!buf)
Dave Chinner24513372014-06-25 14:58:08 +100074 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Nathan Scott745b1f472006-09-28 11:02:23 +100076 error = xfs_iget(mp, NULL, ino,
Dave Chinner5132ba82012-03-22 05:15:10 +000077 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
78 XFS_ILOCK_SHARED, &ip);
Jie Liu8fe65772014-07-24 11:33:28 +100079 if (error)
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100080 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 ASSERT(ip != NULL);
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110083 ASSERT(ip->i_imap.im_blkno != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85 dic = &ip->i_d;
86
87 /* xfs_iget returns the following without needing
88 * further change.
89 */
90 buf->bs_nlink = dic->di_nlink;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +000091 buf->bs_projid_lo = dic->di_projid_lo;
92 buf->bs_projid_hi = dic->di_projid_hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 buf->bs_ino = ino;
94 buf->bs_mode = dic->di_mode;
95 buf->bs_uid = dic->di_uid;
96 buf->bs_gid = dic->di_gid;
97 buf->bs_size = dic->di_size;
Christoph Hellwig8a9c9982012-02-29 09:53:52 +000098 buf->bs_atime.tv_sec = dic->di_atime.t_sec;
99 buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
100 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
101 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
102 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
103 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 buf->bs_xflags = xfs_ip2xflags(ip);
105 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
106 buf->bs_extents = dic->di_nextents;
107 buf->bs_gen = dic->di_gen;
108 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
109 buf->bs_dmevmask = dic->di_dmevmask;
110 buf->bs_dmstate = dic->di_dmstate;
111 buf->bs_aextents = dic->di_anextents;
Dave Chinner07000ee2010-03-05 04:41:14 +0000112 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 switch (dic->di_format) {
115 case XFS_DINODE_FMT_DEV:
116 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
117 buf->bs_blksize = BLKDEV_IOSIZE;
118 buf->bs_blocks = 0;
119 break;
120 case XFS_DINODE_FMT_LOCAL:
121 case XFS_DINODE_FMT_UUID:
122 buf->bs_rdev = 0;
123 buf->bs_blksize = mp->m_sb.sb_blocksize;
124 buf->bs_blocks = 0;
125 break;
126 case XFS_DINODE_FMT_EXTENTS:
127 case XFS_DINODE_FMT_BTREE:
128 buf->bs_rdev = 0;
129 buf->bs_blksize = mp->m_sb.sb_blocksize;
130 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
131 break;
132 }
Christoph Hellwigf2d67612010-06-24 11:52:50 +1000133 xfs_iunlock(ip, XFS_ILOCK_SHARED);
134 IRELE(ip);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000135
136 error = formatter(buffer, ubsize, ubused, buf);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000137 if (!error)
138 *stat = BULKSTAT_RV_DIDONE;
139
140 out_free:
141 kmem_free(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 return error;
143}
144
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600145/* Return 0 on success or positive error */
Michal Marekfaa63e92007-07-11 11:10:19 +1000146STATIC int
147xfs_bulkstat_one_fmt(
148 void __user *ubuffer,
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600149 int ubsize,
150 int *ubused,
Michal Marekfaa63e92007-07-11 11:10:19 +1000151 const xfs_bstat_t *buffer)
152{
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600153 if (ubsize < sizeof(*buffer))
Dave Chinner24513372014-06-25 14:58:08 +1000154 return -ENOMEM;
Michal Marekfaa63e92007-07-11 11:10:19 +1000155 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
Dave Chinner24513372014-06-25 14:58:08 +1000156 return -EFAULT;
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600157 if (ubused)
158 *ubused = sizeof(*buffer);
159 return 0;
Michal Marekfaa63e92007-07-11 11:10:19 +1000160}
161
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600162int
163xfs_bulkstat_one(
164 xfs_mount_t *mp, /* mount point for filesystem */
165 xfs_ino_t ino, /* inode number to get data for */
166 void __user *buffer, /* buffer to place output in */
167 int ubsize, /* size of buffer */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600168 int *ubused, /* bytes used by me */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600169 int *stat) /* BULKSTAT_RV_... */
170{
171 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
Dave Chinner7b6259e2010-06-24 11:35:17 +1000172 xfs_bulkstat_one_fmt, ubused, stat);
Nathan Scott8b56f082006-09-28 11:01:46 +1000173}
174
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000175/*
176 * Loop over all clusters in a chunk for a given incore inode allocation btree
177 * record. Do a readahead if there are any allocated inodes in that cluster.
178 */
179STATIC void
180xfs_bulkstat_ichunk_ra(
181 struct xfs_mount *mp,
182 xfs_agnumber_t agno,
183 struct xfs_inobt_rec_incore *irec)
184{
185 xfs_agblock_t agbno;
186 struct blk_plug plug;
187 int blks_per_cluster;
188 int inodes_per_cluster;
189 int i; /* inode chunk index */
190
191 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
192 blks_per_cluster = xfs_icluster_size_fsb(mp);
193 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
194
195 blk_start_plug(&plug);
196 for (i = 0; i < XFS_INODES_PER_CHUNK;
197 i += inodes_per_cluster, agbno += blks_per_cluster) {
198 if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
199 xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
200 &xfs_inode_buf_ops);
201 }
202 }
203 blk_finish_plug(&plug);
204}
205
Jie Liuf3d1e582014-07-24 18:42:21 +1000206/*
207 * Lookup the inode chunk that the given inode lives in and then get the record
208 * if we found the chunk. If the inode was not the last in the chunk and there
209 * are some left allocated, update the data for the pointed-to record as well as
210 * return the count of grabbed inodes.
211 */
212STATIC int
213xfs_bulkstat_grab_ichunk(
214 struct xfs_btree_cur *cur, /* btree cursor */
215 xfs_agino_t agino, /* starting inode of chunk */
216 int *icount,/* return # of inodes grabbed */
217 struct xfs_inobt_rec_incore *irec) /* btree record */
218{
219 int idx; /* index into inode chunk */
220 int stat;
221 int error = 0;
222
223 /* Lookup the inode chunk that this inode lives in */
224 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
225 if (error)
226 return error;
227 if (!stat) {
228 *icount = 0;
229 return error;
230 }
231
232 /* Get the record, should always work */
233 error = xfs_inobt_get_rec(cur, irec, &stat);
234 if (error)
235 return error;
236 XFS_WANT_CORRUPTED_RETURN(stat == 1);
237
238 /* Check if the record contains the inode in request */
239 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino)
240 return -EINVAL;
241
242 idx = agino - irec->ir_startino + 1;
243 if (idx < XFS_INODES_PER_CHUNK &&
244 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
245 int i;
246
247 /* We got a right chunk with some left inodes allocated at it.
248 * Grab the chunk record. Mark all the uninteresting inodes
249 * free -- because they're before our start point.
250 */
251 for (i = 0; i < idx; i++) {
252 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
253 irec->ir_freecount++;
254 }
255
256 irec->ir_free |= xfs_inobt_maskn(0, idx);
257 *icount = XFS_INODES_PER_CHUNK - irec->ir_freecount;
258 }
259
260 return 0;
261}
262
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100263#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
264
Nathan Scott8b56f082006-09-28 11:01:46 +1000265/*
Jie Liu1e773c42014-08-04 11:22:31 +1000266 * Process inodes in chunk with a pointer to a formatter function
267 * that will iget the inode and fill in the appropriate structure.
268 */
269int
270xfs_bulkstat_ag_ichunk(
271 struct xfs_mount *mp,
272 xfs_agnumber_t agno,
273 struct xfs_inobt_rec_incore *irbp,
274 bulkstat_one_pf formatter,
275 size_t statstruct_size,
276 struct xfs_bulkstat_agichunk *acp)
277{
278 xfs_ino_t lastino = acp->ac_lastino;
279 char __user **ubufp = acp->ac_ubuffer;
280 int ubleft = acp->ac_ubleft;
281 int ubelem = acp->ac_ubelem;
282 int chunkidx, clustidx;
283 int error = 0;
284 xfs_agino_t agino;
285
286 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
287 XFS_BULKSTAT_UBLEFT(ubleft) &&
288 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
289 chunkidx++, clustidx++, agino++) {
290 int fmterror; /* bulkstat formatter result */
291 int ubused;
292 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, agno, agino);
293
294 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
295
296 /* Skip if this inode is free */
297 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
298 lastino = ino;
299 continue;
300 }
301
302 /*
303 * Count used inodes as free so we can tell when the
304 * chunk is used up.
305 */
306 irbp->ir_freecount++;
307
308 /* Get the inode and fill in a single buffer */
309 ubused = statstruct_size;
310 error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror);
311 if (fmterror == BULKSTAT_RV_NOTHING) {
312 if (error && error != -ENOENT && error != -EINVAL) {
313 ubleft = 0;
314 break;
315 }
316 lastino = ino;
317 continue;
318 }
319 if (fmterror == BULKSTAT_RV_GIVEUP) {
320 ubleft = 0;
321 ASSERT(error);
322 break;
323 }
324 if (*ubufp)
325 *ubufp += ubused;
326 ubleft -= ubused;
327 ubelem++;
328 lastino = ino;
329 }
330
331 acp->ac_lastino = lastino;
332 acp->ac_ubleft = ubleft;
333 acp->ac_ubelem = ubelem;
334
335 return error;
336}
337
338/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 * Return stat information in bulk (by-inode) for the filesystem.
340 */
341int /* error status */
342xfs_bulkstat(
343 xfs_mount_t *mp, /* mount point for filesystem */
344 xfs_ino_t *lastinop, /* last inode returned */
345 int *ubcountp, /* size of buffer/count returned */
346 bulkstat_one_pf formatter, /* func that'd fill a single buf */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 size_t statstruct_size, /* sizeof struct filling */
348 char __user *ubuffer, /* buffer with inode stats */
Nathan Scottc41564b2006-03-29 08:55:14 +1000349 int *done) /* 1 if there are more stats to get */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 xfs_buf_t *agbp; /* agi header buffer */
352 xfs_agi_t *agi; /* agi header data */
353 xfs_agino_t agino; /* inode # in allocation group */
354 xfs_agnumber_t agno; /* allocation group number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
356 int end_of_ag; /* set if we've seen the ag end */
357 int error; /* error code */
358 int fmterror;/* bulkstat formatter result */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 int i; /* loop index */
360 int icount; /* count of inodes good in irbuf */
Nathan Scott215101c2006-09-28 11:04:43 +1000361 size_t irbsize; /* size of irec buffer in bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 xfs_ino_t ino; /* inode number (filesystem) */
Nathan Scott262750932006-09-28 11:02:03 +1000363 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
364 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
365 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100366 xfs_ino_t lastino; /* last inode number returned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 int nirbuf; /* size of irbuf */
368 int rval; /* return value error code */
369 int tmp; /* result value from btree calls */
370 int ubcount; /* size of user's buffer */
371 int ubleft; /* bytes left in user's buffer */
372 char __user *ubufp; /* pointer into user's buffer */
373 int ubelem; /* spaces used in user's buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 /*
376 * Get the last inode value, see if there's nothing to do.
377 */
378 ino = (xfs_ino_t)*lastinop;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100379 lastino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 agno = XFS_INO_TO_AGNO(mp, ino);
381 agino = XFS_INO_TO_AGINO(mp, ino);
382 if (agno >= mp->m_sb.sb_agcount ||
383 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
384 *done = 1;
385 *ubcountp = 0;
386 return 0;
387 }
Jie Liu296dfd72014-07-24 18:40:26 +1000388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 ubcount = *ubcountp; /* statstruct's */
390 ubleft = ubcount * statstruct_size; /* bytes */
391 *ubcountp = ubelem = 0;
392 *done = 0;
393 fmterror = 0;
394 ubufp = ubuffer;
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000395 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
396 if (!irbuf)
Dave Chinner24513372014-06-25 14:58:08 +1000397 return -ENOMEM;
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000398
Nathan Scottbb3c7d22006-09-28 11:02:09 +1000399 nirbuf = irbsize / sizeof(*irbuf);
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 /*
402 * Loop over the allocation groups, starting from the last
403 * inode returned; 0 means start of the allocation group.
404 */
405 rval = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100406 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
407 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liud4c27342014-07-24 18:40:43 +1000409 if (error)
410 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 agi = XFS_BUF_TO_AGI(agbp);
412 /*
413 * Allocate and initialize a btree cursor for ialloc btree.
414 */
Brian Foster57bd3db2014-04-24 16:00:50 +1000415 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
416 XFS_BTNUM_INO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 irbp = irbuf;
418 irbufend = irbuf + nirbuf;
419 end_of_ag = 0;
Jie Liuf3d1e582014-07-24 18:42:21 +1000420 icount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (agino > 0) {
422 /*
Jie Liuf3d1e582014-07-24 18:42:21 +1000423 * In the middle of an allocation group, we need to get
424 * the remainder of the chunk we're in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 */
Jie Liuf3d1e582014-07-24 18:42:21 +1000426 struct xfs_inobt_rec_incore r;
427
428 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
429 if (error)
430 break;
431 if (icount) {
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300432 irbp->ir_startino = r.ir_startino;
433 irbp->ir_freecount = r.ir_freecount;
434 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 irbp++;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300436 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
Jie Liuf3d1e582014-07-24 18:42:21 +1000438 /* Increment to the next record */
439 error = xfs_btree_increment(cur, 0, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 } else {
Jie Liuf3d1e582014-07-24 18:42:21 +1000441 /* Start of ag. Lookup the first inode chunk */
Christoph Hellwig21875502009-08-31 20:58:21 -0300442 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 }
Jie Liud4c27342014-07-24 18:40:43 +1000444 if (error)
445 break;
446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 /*
448 * Loop through inode btree records in this ag,
449 * until we run out of inodes or space in the buffer.
450 */
451 while (irbp < irbufend && icount < ubcount) {
Jie Liud4c27342014-07-24 18:40:43 +1000452 struct xfs_inobt_rec_incore r;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300453
454 error = xfs_inobt_get_rec(cur, &r, &i);
455 if (error || i == 0) {
456 end_of_ag = 1;
457 break;
458 }
459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 /*
461 * If this chunk has any allocated inodes, save it.
Nathan Scott262750932006-09-28 11:02:03 +1000462 * Also start read-ahead now for this chunk.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 */
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300464 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000465 xfs_bulkstat_ichunk_ra(mp, agno, &r);
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300466 irbp->ir_startino = r.ir_startino;
467 irbp->ir_freecount = r.ir_freecount;
468 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 irbp++;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300470 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 }
472 /*
473 * Set agino to after this chunk and bump the cursor.
474 */
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300475 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
Christoph Hellwig637aa502008-10-30 16:55:45 +1100476 error = xfs_btree_increment(cur, 0, &tmp);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100477 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 }
479 /*
480 * Drop the btree buffers and the agi buffer.
481 * We can't hold any of the locks these represent
482 * when calling iget.
483 */
484 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
485 xfs_buf_relse(agbp);
486 /*
487 * Now format all the good inodes into the user's buffer.
488 */
489 irbufend = irbp;
490 for (irbp = irbuf;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100491 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
Jie Liu1e773c42014-08-04 11:22:31 +1000492 struct xfs_bulkstat_agichunk ac;
Jie Liu9cee4c52013-07-01 21:51:32 +0800493
Jie Liu1e773c42014-08-04 11:22:31 +1000494 ac.ac_lastino = lastino;
495 ac.ac_ubuffer = &ubuffer;
496 ac.ac_ubleft = ubleft;
497 ac.ac_ubelem = ubelem;
498 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
499 formatter, statstruct_size, &ac);
500 if (error)
501 rval = error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Jie Liu1e773c42014-08-04 11:22:31 +1000503 lastino = ac.ac_lastino;
504 ubleft = ac.ac_ubleft;
505 ubelem = ac.ac_ubelem;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100506
507 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 /*
510 * Set up for the next loop iteration.
511 */
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100512 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 if (end_of_ag) {
514 agno++;
515 agino = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100516 } else
517 agino = XFS_INO_TO_AGINO(mp, lastino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 } else
519 break;
520 }
521 /*
522 * Done, we're either out of filesystem or space to put the data.
523 */
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000524 kmem_free(irbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 *ubcountp = ubelem;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100526 /*
527 * Found some inodes, return them now and return the error next time.
528 */
529 if (ubelem)
530 rval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 if (agno >= mp->m_sb.sb_agcount) {
532 /*
533 * If we ran out of filesystem, mark lastino as off
534 * the end of the filesystem, so the next call
535 * will return immediately.
536 */
537 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
538 *done = 1;
539 } else
540 *lastinop = (xfs_ino_t)lastino;
541
542 return rval;
543}
544
Michal Marekfaa63e92007-07-11 11:10:19 +1000545int
546xfs_inumbers_fmt(
547 void __user *ubuffer, /* buffer to write to */
Jie Liu549fa002014-07-24 12:11:47 +1000548 const struct xfs_inogrp *buffer, /* buffer to read from */
Michal Marekfaa63e92007-07-11 11:10:19 +1000549 long count, /* # of elements to read */
550 long *written) /* # of bytes written */
551{
552 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
553 return -EFAULT;
554 *written = count * sizeof(*buffer);
555 return 0;
556}
557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558/*
559 * Return inode number table for the filesystem.
560 */
561int /* error status */
562xfs_inumbers(
Jie Liu549fa002014-07-24 12:11:47 +1000563 struct xfs_mount *mp,/* mount point for filesystem */
564 xfs_ino_t *lastino,/* last inode returned */
565 int *count,/* size of buffer/count returned */
566 void __user *ubuffer,/* buffer with inode descriptions */
567 inumbers_fmt_pf formatter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568{
Jie Liu549fa002014-07-24 12:11:47 +1000569 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
570 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
571 struct xfs_btree_cur *cur = NULL;
Jie Liuc7cb51d2014-07-24 12:18:47 +1000572 struct xfs_buf *agbp = NULL;
Jie Liu549fa002014-07-24 12:11:47 +1000573 struct xfs_inogrp *buffer;
574 int bcount;
575 int left = *count;
576 int bufidx = 0;
577 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 *count = 0;
Jie Liu549fa002014-07-24 12:11:47 +1000580 if (agno >= mp->m_sb.sb_agcount ||
581 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
582 return error;
583
Tim Shimmine6a4b372007-11-23 16:30:42 +1100584 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000586 do {
Jie Liu549fa002014-07-24 12:11:47 +1000587 struct xfs_inobt_rec_incore r;
588 int stat;
589
Jie Liuc7cb51d2014-07-24 12:18:47 +1000590 if (!agbp) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000592 if (error)
593 break;
594
Brian Foster57bd3db2014-04-24 16:00:50 +1000595 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
596 XFS_BTNUM_INO);
Christoph Hellwig21875502009-08-31 20:58:21 -0300597 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
Jie Liu549fa002014-07-24 12:11:47 +1000598 &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000599 if (error)
600 break;
601 if (!stat)
602 goto next_ag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000604
Jie Liu549fa002014-07-24 12:11:47 +1000605 error = xfs_inobt_get_rec(cur, &r, &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000606 if (error)
607 break;
608 if (!stat)
609 goto next_ag;
610
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300611 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
612 buffer[bufidx].xi_startino =
613 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
614 buffer[bufidx].xi_alloccount =
615 XFS_INODES_PER_CHUNK - r.ir_freecount;
616 buffer[bufidx].xi_allocmask = ~r.ir_free;
Jie Liuc7cb51d2014-07-24 12:18:47 +1000617 if (++bufidx == bcount) {
618 long written;
619
Jie Liu549fa002014-07-24 12:11:47 +1000620 error = formatter(ubuffer, buffer, bufidx, &written);
621 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 break;
Michal Marekfaa63e92007-07-11 11:10:19 +1000623 ubuffer += written;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 *count += bufidx;
625 bufidx = 0;
626 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000627 if (!--left)
628 break;
629
630 error = xfs_btree_increment(cur, 0, &stat);
631 if (error)
632 break;
633 if (stat)
634 continue;
635
636next_ag:
637 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
638 cur = NULL;
639 xfs_buf_relse(agbp);
640 agbp = NULL;
641 agino = 0;
Eric Sandeena8b1ee82014-10-13 10:21:53 +1100642 agno++;
643 } while (agno < mp->m_sb.sb_agcount);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 if (!error) {
646 if (bufidx) {
Jie Liuc7cb51d2014-07-24 12:18:47 +1000647 long written;
648
Jie Liu549fa002014-07-24 12:11:47 +1000649 error = formatter(ubuffer, buffer, bufidx, &written);
650 if (!error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 *count += bufidx;
652 }
653 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
654 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000655
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000656 kmem_free(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (cur)
658 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
659 XFS_BTREE_NOERROR));
660 if (agbp)
661 xfs_buf_relse(agbp);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 return error;
664}