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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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_inode.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110026#include "xfs_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_ialloc.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110028#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_itable.h"
30#include "xfs_error.h"
Christoph Hellwigf2d67612010-06-24 11:52:50 +100031#include "xfs_trace.h"
Dave Chinner33479e02012-10-08 21:56:11 +110032#include "xfs_icache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Eric Sandeend96f8f82009-07-02 00:09:33 -050034STATIC int
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100035xfs_internal_inum(
36 xfs_mount_t *mp,
37 xfs_ino_t ino)
38{
39 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
Eric Sandeen62118702008-03-06 13:44:28 +110040 (xfs_sb_version_hasquota(&mp->m_sb) &&
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -050041 xfs_is_quota_inode(&mp->m_sb, ino)));
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100042}
43
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100044/*
45 * Return stat information for one inode.
46 * Return 0 if ok, else errno.
47 */
48int
49xfs_bulkstat_one_int(
50 struct xfs_mount *mp, /* mount point for filesystem */
51 xfs_ino_t ino, /* inode to get data for */
52 void __user *buffer, /* buffer to place output in */
53 int ubsize, /* size of buffer */
54 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100055 int *ubused, /* bytes used by me */
56 int *stat) /* BULKSTAT_RV_... */
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100058 struct xfs_icdinode *dic; /* dinode core info pointer */
59 struct xfs_inode *ip; /* incore inode pointer */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100060 struct xfs_bstat *buf; /* return buffer */
61 int error = 0; /* error value */
62
63 *stat = BULKSTAT_RV_NOTHING;
64
65 if (!buffer || xfs_internal_inum(mp, ino))
Dave Chinner24513372014-06-25 14:58:08 +100066 return -EINVAL;
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100067
68 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
69 if (!buf)
Dave Chinner24513372014-06-25 14:58:08 +100070 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Nathan Scott745b1f472006-09-28 11:02:23 +100072 error = xfs_iget(mp, NULL, ino,
Dave Chinner5132ba82012-03-22 05:15:10 +000073 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
74 XFS_ILOCK_SHARED, &ip);
Jie Liu8fe65772014-07-24 11:33:28 +100075 if (error)
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100076 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78 ASSERT(ip != NULL);
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110079 ASSERT(ip->i_imap.im_blkno != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81 dic = &ip->i_d;
82
83 /* xfs_iget returns the following without needing
84 * further change.
85 */
86 buf->bs_nlink = dic->di_nlink;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +000087 buf->bs_projid_lo = dic->di_projid_lo;
88 buf->bs_projid_hi = dic->di_projid_hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 buf->bs_ino = ino;
90 buf->bs_mode = dic->di_mode;
91 buf->bs_uid = dic->di_uid;
92 buf->bs_gid = dic->di_gid;
93 buf->bs_size = dic->di_size;
Christoph Hellwig8a9c9982012-02-29 09:53:52 +000094 buf->bs_atime.tv_sec = dic->di_atime.t_sec;
95 buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
96 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
97 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
98 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
99 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 buf->bs_xflags = xfs_ip2xflags(ip);
101 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
102 buf->bs_extents = dic->di_nextents;
103 buf->bs_gen = dic->di_gen;
104 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
105 buf->bs_dmevmask = dic->di_dmevmask;
106 buf->bs_dmstate = dic->di_dmstate;
107 buf->bs_aextents = dic->di_anextents;
Dave Chinner07000ee2010-03-05 04:41:14 +0000108 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110 switch (dic->di_format) {
111 case XFS_DINODE_FMT_DEV:
112 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
113 buf->bs_blksize = BLKDEV_IOSIZE;
114 buf->bs_blocks = 0;
115 break;
116 case XFS_DINODE_FMT_LOCAL:
117 case XFS_DINODE_FMT_UUID:
118 buf->bs_rdev = 0;
119 buf->bs_blksize = mp->m_sb.sb_blocksize;
120 buf->bs_blocks = 0;
121 break;
122 case XFS_DINODE_FMT_EXTENTS:
123 case XFS_DINODE_FMT_BTREE:
124 buf->bs_rdev = 0;
125 buf->bs_blksize = mp->m_sb.sb_blocksize;
126 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
127 break;
128 }
Christoph Hellwigf2d67612010-06-24 11:52:50 +1000129 xfs_iunlock(ip, XFS_ILOCK_SHARED);
130 IRELE(ip);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000131
132 error = formatter(buffer, ubsize, ubused, buf);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000133 if (!error)
134 *stat = BULKSTAT_RV_DIDONE;
135
136 out_free:
137 kmem_free(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 return error;
139}
140
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600141/* Return 0 on success or positive error */
Michal Marekfaa63e92007-07-11 11:10:19 +1000142STATIC int
143xfs_bulkstat_one_fmt(
144 void __user *ubuffer,
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600145 int ubsize,
146 int *ubused,
Michal Marekfaa63e92007-07-11 11:10:19 +1000147 const xfs_bstat_t *buffer)
148{
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600149 if (ubsize < sizeof(*buffer))
Dave Chinner24513372014-06-25 14:58:08 +1000150 return -ENOMEM;
Michal Marekfaa63e92007-07-11 11:10:19 +1000151 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
Dave Chinner24513372014-06-25 14:58:08 +1000152 return -EFAULT;
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600153 if (ubused)
154 *ubused = sizeof(*buffer);
155 return 0;
Michal Marekfaa63e92007-07-11 11:10:19 +1000156}
157
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600158int
159xfs_bulkstat_one(
160 xfs_mount_t *mp, /* mount point for filesystem */
161 xfs_ino_t ino, /* inode number to get data for */
162 void __user *buffer, /* buffer to place output in */
163 int ubsize, /* size of buffer */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600164 int *ubused, /* bytes used by me */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600165 int *stat) /* BULKSTAT_RV_... */
166{
167 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
Dave Chinner7b6259e2010-06-24 11:35:17 +1000168 xfs_bulkstat_one_fmt, ubused, stat);
Nathan Scott8b56f082006-09-28 11:01:46 +1000169}
170
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000171/*
172 * Loop over all clusters in a chunk for a given incore inode allocation btree
173 * record. Do a readahead if there are any allocated inodes in that cluster.
174 */
175STATIC void
176xfs_bulkstat_ichunk_ra(
177 struct xfs_mount *mp,
178 xfs_agnumber_t agno,
179 struct xfs_inobt_rec_incore *irec)
180{
181 xfs_agblock_t agbno;
182 struct blk_plug plug;
183 int blks_per_cluster;
184 int inodes_per_cluster;
185 int i; /* inode chunk index */
186
187 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
188 blks_per_cluster = xfs_icluster_size_fsb(mp);
189 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
190
191 blk_start_plug(&plug);
192 for (i = 0; i < XFS_INODES_PER_CHUNK;
193 i += inodes_per_cluster, agbno += blks_per_cluster) {
194 if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
195 xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
196 &xfs_inode_buf_ops);
197 }
198 }
199 blk_finish_plug(&plug);
200}
201
Jie Liuf3d1e582014-07-24 18:42:21 +1000202/*
203 * Lookup the inode chunk that the given inode lives in and then get the record
204 * if we found the chunk. If the inode was not the last in the chunk and there
205 * are some left allocated, update the data for the pointed-to record as well as
206 * return the count of grabbed inodes.
207 */
208STATIC int
209xfs_bulkstat_grab_ichunk(
210 struct xfs_btree_cur *cur, /* btree cursor */
211 xfs_agino_t agino, /* starting inode of chunk */
212 int *icount,/* return # of inodes grabbed */
213 struct xfs_inobt_rec_incore *irec) /* btree record */
214{
215 int idx; /* index into inode chunk */
216 int stat;
217 int error = 0;
218
219 /* Lookup the inode chunk that this inode lives in */
220 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
221 if (error)
222 return error;
223 if (!stat) {
224 *icount = 0;
225 return error;
226 }
227
228 /* Get the record, should always work */
229 error = xfs_inobt_get_rec(cur, irec, &stat);
230 if (error)
231 return error;
232 XFS_WANT_CORRUPTED_RETURN(stat == 1);
233
234 /* Check if the record contains the inode in request */
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100235 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
236 *icount = 0;
237 return 0;
238 }
Jie Liuf3d1e582014-07-24 18:42:21 +1000239
240 idx = agino - irec->ir_startino + 1;
241 if (idx < XFS_INODES_PER_CHUNK &&
242 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
243 int i;
244
245 /* We got a right chunk with some left inodes allocated at it.
246 * Grab the chunk record. Mark all the uninteresting inodes
247 * free -- because they're before our start point.
248 */
249 for (i = 0; i < idx; i++) {
250 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
251 irec->ir_freecount++;
252 }
253
254 irec->ir_free |= xfs_inobt_maskn(0, idx);
255 *icount = XFS_INODES_PER_CHUNK - irec->ir_freecount;
256 }
257
258 return 0;
259}
260
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100261#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
262
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100263struct xfs_bulkstat_agichunk {
264 char __user **ac_ubuffer;/* pointer into user's buffer */
265 int ac_ubleft; /* bytes left in user's buffer */
266 int ac_ubelem; /* spaces used in user's buffer */
267};
268
Nathan Scott8b56f082006-09-28 11:01:46 +1000269/*
Jie Liu1e773c42014-08-04 11:22:31 +1000270 * Process inodes in chunk with a pointer to a formatter function
271 * that will iget the inode and fill in the appropriate structure.
272 */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100273static int
Jie Liu1e773c42014-08-04 11:22:31 +1000274xfs_bulkstat_ag_ichunk(
275 struct xfs_mount *mp,
276 xfs_agnumber_t agno,
277 struct xfs_inobt_rec_incore *irbp,
278 bulkstat_one_pf formatter,
279 size_t statstruct_size,
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100280 struct xfs_bulkstat_agichunk *acp,
Dave Chinner00275892014-11-07 08:33:52 +1100281 xfs_agino_t *last_agino)
Jie Liu1e773c42014-08-04 11:22:31 +1000282{
Jie Liu1e773c42014-08-04 11:22:31 +1000283 char __user **ubufp = acp->ac_ubuffer;
Dave Chinner2b831ac2014-11-07 08:30:58 +1100284 int chunkidx;
Jie Liu1e773c42014-08-04 11:22:31 +1000285 int error = 0;
Dave Chinner00275892014-11-07 08:33:52 +1100286 xfs_agino_t agino = irbp->ir_startino;
Jie Liu1e773c42014-08-04 11:22:31 +1000287
Dave Chinner2b831ac2014-11-07 08:30:58 +1100288 for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
289 chunkidx++, agino++) {
290 int fmterror;
Jie Liu1e773c42014-08-04 11:22:31 +1000291 int ubused;
Dave Chinner00275892014-11-07 08:33:52 +1100292
293 /* inode won't fit in buffer, we are done */
294 if (acp->ac_ubleft < statstruct_size)
295 break;
Jie Liu1e773c42014-08-04 11:22:31 +1000296
Jie Liu1e773c42014-08-04 11:22:31 +1000297 /* Skip if this inode is free */
Dave Chinner00275892014-11-07 08:33:52 +1100298 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
Jie Liu1e773c42014-08-04 11:22:31 +1000299 continue;
Jie Liu1e773c42014-08-04 11:22:31 +1000300
Jie Liu1e773c42014-08-04 11:22:31 +1000301 /* Get the inode and fill in a single buffer */
302 ubused = statstruct_size;
Dave Chinner00275892014-11-07 08:33:52 +1100303 error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
304 *ubufp, acp->ac_ubleft, &ubused, &fmterror);
305
Dave Chinner2b831ac2014-11-07 08:30:58 +1100306 if (fmterror == BULKSTAT_RV_GIVEUP ||
307 (error && error != -ENOENT && error != -EINVAL)) {
308 acp->ac_ubleft = 0;
Jie Liu1e773c42014-08-04 11:22:31 +1000309 ASSERT(error);
310 break;
311 }
Jie Liu1e773c42014-08-04 11:22:31 +1000312
Dave Chinner2b831ac2014-11-07 08:30:58 +1100313 /* be careful not to leak error if at end of chunk */
314 if (fmterror == BULKSTAT_RV_NOTHING || error) {
Dave Chinner2b831ac2014-11-07 08:30:58 +1100315 error = 0;
316 continue;
317 }
318
319 *ubufp += ubused;
320 acp->ac_ubleft -= ubused;
321 acp->ac_ubelem++;
Dave Chinner2b831ac2014-11-07 08:30:58 +1100322 }
Jie Liu1e773c42014-08-04 11:22:31 +1000323
Dave Chinner00275892014-11-07 08:33:52 +1100324 /*
325 * Post-update *last_agino. At this point, agino will always point one
326 * inode past the last inode we processed successfully. Hence we
327 * substract that inode when setting the *last_agino cursor so that we
328 * return the correct cookie to userspace. On the next bulkstat call,
329 * the inode under the lastino cookie will be skipped as we have already
330 * processed it here.
331 */
332 *last_agino = agino - 1;
333
Jie Liu1e773c42014-08-04 11:22:31 +1000334 return error;
335}
336
337/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 * Return stat information in bulk (by-inode) for the filesystem.
339 */
340int /* error status */
341xfs_bulkstat(
342 xfs_mount_t *mp, /* mount point for filesystem */
343 xfs_ino_t *lastinop, /* last inode returned */
344 int *ubcountp, /* size of buffer/count returned */
345 bulkstat_one_pf formatter, /* func that'd fill a single buf */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 size_t statstruct_size, /* sizeof struct filling */
347 char __user *ubuffer, /* buffer with inode stats */
Nathan Scottc41564b2006-03-29 08:55:14 +1000348 int *done) /* 1 if there are more stats to get */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 xfs_buf_t *agbp; /* agi header buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 xfs_agino_t agino; /* inode # in allocation group */
352 xfs_agnumber_t agno; /* allocation group number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
Nathan Scott215101c2006-09-28 11:04:43 +1000354 size_t irbsize; /* size of irec buffer in bytes */
Nathan Scott262750932006-09-28 11:02:03 +1000355 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 int nirbuf; /* size of irbuf */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 int ubcount; /* size of user's buffer */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100358 struct xfs_bulkstat_agichunk ac;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100359 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 /*
362 * Get the last inode value, see if there's nothing to do.
363 */
Dave Chinner00275892014-11-07 08:33:52 +1100364 agno = XFS_INO_TO_AGNO(mp, *lastinop);
365 agino = XFS_INO_TO_AGINO(mp, *lastinop);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (agno >= mp->m_sb.sb_agcount ||
Dave Chinner00275892014-11-07 08:33:52 +1100367 *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 *done = 1;
369 *ubcountp = 0;
370 return 0;
371 }
Jie Liu296dfd72014-07-24 18:40:26 +1000372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 ubcount = *ubcountp; /* statstruct's */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100374 ac.ac_ubuffer = &ubuffer;
375 ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
376 ac.ac_ubelem = 0;
377
378 *ubcountp = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 *done = 0;
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100380
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000381 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
382 if (!irbuf)
Dave Chinner24513372014-06-25 14:58:08 +1000383 return -ENOMEM;
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000384
Nathan Scottbb3c7d22006-09-28 11:02:09 +1000385 nirbuf = irbsize / sizeof(*irbuf);
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 /*
388 * Loop over the allocation groups, starting from the last
389 * inode returned; 0 means start of the allocation group.
390 */
Dave Chinner6e57c5422014-11-07 08:31:13 +1100391 while (agno < mp->m_sb.sb_agcount) {
392 struct xfs_inobt_rec_incore *irbp = irbuf;
393 struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf;
394 bool end_of_ag = false;
395 int icount = 0;
396 int stat;
397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liud4c27342014-07-24 18:40:43 +1000399 if (error)
400 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 /*
402 * Allocate and initialize a btree cursor for ialloc btree.
403 */
Brian Foster57bd3db2014-04-24 16:00:50 +1000404 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
405 XFS_BTNUM_INO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 if (agino > 0) {
407 /*
Jie Liuf3d1e582014-07-24 18:42:21 +1000408 * In the middle of an allocation group, we need to get
409 * the remainder of the chunk we're in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 */
Jie Liuf3d1e582014-07-24 18:42:21 +1000411 struct xfs_inobt_rec_incore r;
412
413 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
414 if (error)
Dave Chinnera6bbce52014-10-29 08:22:18 +1100415 goto del_cursor;
Jie Liuf3d1e582014-07-24 18:42:21 +1000416 if (icount) {
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300417 irbp->ir_startino = r.ir_startino;
418 irbp->ir_freecount = r.ir_freecount;
419 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 irbp++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 }
Jie Liuf3d1e582014-07-24 18:42:21 +1000422 /* Increment to the next record */
Dave Chinnerafa947c2014-11-07 08:29:57 +1100423 error = xfs_btree_increment(cur, 0, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 } else {
Jie Liuf3d1e582014-07-24 18:42:21 +1000425 /* Start of ag. Lookup the first inode chunk */
Dave Chinnerafa947c2014-11-07 08:29:57 +1100426 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 }
Dave Chinnerafa947c2014-11-07 08:29:57 +1100428 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100429 end_of_ag = true;
Dave Chinnera6bbce52014-10-29 08:22:18 +1100430 goto del_cursor;
Dave Chinnerafa947c2014-11-07 08:29:57 +1100431 }
Jie Liud4c27342014-07-24 18:40:43 +1000432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 /*
434 * Loop through inode btree records in this ag,
435 * until we run out of inodes or space in the buffer.
436 */
437 while (irbp < irbufend && icount < ubcount) {
Jie Liud4c27342014-07-24 18:40:43 +1000438 struct xfs_inobt_rec_incore r;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300439
Dave Chinnerafa947c2014-11-07 08:29:57 +1100440 error = xfs_inobt_get_rec(cur, &r, &stat);
441 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100442 end_of_ag = true;
Dave Chinnera6bbce52014-10-29 08:22:18 +1100443 goto del_cursor;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300444 }
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 /*
447 * If this chunk has any allocated inodes, save it.
Nathan Scott262750932006-09-28 11:02:03 +1000448 * Also start read-ahead now for this chunk.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 */
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300450 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000451 xfs_bulkstat_ichunk_ra(mp, agno, &r);
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300452 irbp->ir_startino = r.ir_startino;
453 irbp->ir_freecount = r.ir_freecount;
454 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 irbp++;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300456 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 }
Dave Chinnerafa947c2014-11-07 08:29:57 +1100458 error = xfs_btree_increment(cur, 0, &stat);
459 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100460 end_of_ag = true;
Jan Kara7a19dee2014-10-30 10:34:52 +1100461 goto del_cursor;
462 }
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100463 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 }
Dave Chinnera6bbce52014-10-29 08:22:18 +1100465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 /*
Dave Chinnera6bbce52014-10-29 08:22:18 +1100467 * Drop the btree buffers and the agi buffer as we can't hold any
468 * of the locks these represent when calling iget. If there is a
469 * pending error, then we are done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 */
Dave Chinnera6bbce52014-10-29 08:22:18 +1100471del_cursor:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
473 xfs_buf_relse(agbp);
Dave Chinnera6bbce52014-10-29 08:22:18 +1100474 if (error)
475 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 /*
Dave Chinner00275892014-11-07 08:33:52 +1100477 * Now format all the good inodes into the user's buffer. The
478 * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
479 * for the next loop iteration.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 */
481 irbufend = irbp;
482 for (irbp = irbuf;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100483 irbp < irbufend && ac.ac_ubleft >= statstruct_size;
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100484 irbp++) {
Jie Liu1e773c42014-08-04 11:22:31 +1000485 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100486 formatter, statstruct_size, &ac,
Dave Chinner00275892014-11-07 08:33:52 +1100487 &agino);
Jie Liu1e773c42014-08-04 11:22:31 +1000488 if (error)
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100489 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100491 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100493
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100494 /*
495 * If we've run out of space or had a formatting error, we
496 * are now done
497 */
498 if (ac.ac_ubleft < statstruct_size || error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 break;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100500
501 if (end_of_ag) {
502 agno++;
503 agino = 0;
Dave Chinner00275892014-11-07 08:33:52 +1100504 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
506 /*
507 * Done, we're either out of filesystem or space to put the data.
508 */
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000509 kmem_free(irbuf);
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100510 *ubcountp = ac.ac_ubelem;
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100511
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100512 /*
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100513 * We found some inodes, so clear the error status and return them.
514 * The lastino pointer will point directly at the inode that triggered
515 * any error that occurred, so on the next call the error will be
516 * triggered again and propagated to userspace as there will be no
517 * formatted inodes in the buffer.
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100518 */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100519 if (ac.ac_ubelem)
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100520 error = 0;
521
Dave Chinner00275892014-11-07 08:33:52 +1100522 /*
523 * If we ran out of filesystem, lastino will point off the end of
524 * the filesystem so the next call will return immediately.
525 */
526 *lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
527 if (agno >= mp->m_sb.sb_agcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 *done = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100530 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531}
532
Michal Marekfaa63e92007-07-11 11:10:19 +1000533int
534xfs_inumbers_fmt(
535 void __user *ubuffer, /* buffer to write to */
Jie Liu549fa002014-07-24 12:11:47 +1000536 const struct xfs_inogrp *buffer, /* buffer to read from */
Michal Marekfaa63e92007-07-11 11:10:19 +1000537 long count, /* # of elements to read */
538 long *written) /* # of bytes written */
539{
540 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
541 return -EFAULT;
542 *written = count * sizeof(*buffer);
543 return 0;
544}
545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546/*
547 * Return inode number table for the filesystem.
548 */
549int /* error status */
550xfs_inumbers(
Jie Liu549fa002014-07-24 12:11:47 +1000551 struct xfs_mount *mp,/* mount point for filesystem */
552 xfs_ino_t *lastino,/* last inode returned */
553 int *count,/* size of buffer/count returned */
554 void __user *ubuffer,/* buffer with inode descriptions */
555 inumbers_fmt_pf formatter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Jie Liu549fa002014-07-24 12:11:47 +1000557 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
558 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
559 struct xfs_btree_cur *cur = NULL;
Jie Liuc7cb51d2014-07-24 12:18:47 +1000560 struct xfs_buf *agbp = NULL;
Jie Liu549fa002014-07-24 12:11:47 +1000561 struct xfs_inogrp *buffer;
562 int bcount;
563 int left = *count;
564 int bufidx = 0;
565 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 *count = 0;
Jie Liu549fa002014-07-24 12:11:47 +1000568 if (agno >= mp->m_sb.sb_agcount ||
569 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
570 return error;
571
Tim Shimmine6a4b372007-11-23 16:30:42 +1100572 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000574 do {
Jie Liu549fa002014-07-24 12:11:47 +1000575 struct xfs_inobt_rec_incore r;
576 int stat;
577
Jie Liuc7cb51d2014-07-24 12:18:47 +1000578 if (!agbp) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000580 if (error)
581 break;
582
Brian Foster57bd3db2014-04-24 16:00:50 +1000583 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
584 XFS_BTNUM_INO);
Christoph Hellwig21875502009-08-31 20:58:21 -0300585 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
Jie Liu549fa002014-07-24 12:11:47 +1000586 &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000587 if (error)
588 break;
589 if (!stat)
590 goto next_ag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000592
Jie Liu549fa002014-07-24 12:11:47 +1000593 error = xfs_inobt_get_rec(cur, &r, &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000594 if (error)
595 break;
596 if (!stat)
597 goto next_ag;
598
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300599 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
600 buffer[bufidx].xi_startino =
601 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
602 buffer[bufidx].xi_alloccount =
603 XFS_INODES_PER_CHUNK - r.ir_freecount;
604 buffer[bufidx].xi_allocmask = ~r.ir_free;
Jie Liuc7cb51d2014-07-24 12:18:47 +1000605 if (++bufidx == bcount) {
606 long written;
607
Jie Liu549fa002014-07-24 12:11:47 +1000608 error = formatter(ubuffer, buffer, bufidx, &written);
609 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 break;
Michal Marekfaa63e92007-07-11 11:10:19 +1000611 ubuffer += written;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 *count += bufidx;
613 bufidx = 0;
614 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000615 if (!--left)
616 break;
617
618 error = xfs_btree_increment(cur, 0, &stat);
619 if (error)
620 break;
621 if (stat)
622 continue;
623
624next_ag:
625 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
626 cur = NULL;
627 xfs_buf_relse(agbp);
628 agbp = NULL;
629 agino = 0;
Eric Sandeena8b1ee82014-10-13 10:21:53 +1100630 agno++;
631 } while (agno < mp->m_sb.sb_agcount);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (!error) {
634 if (bufidx) {
Jie Liuc7cb51d2014-07-24 12:18:47 +1000635 long written;
636
Jie Liu549fa002014-07-24 12:11:47 +1000637 error = formatter(ubuffer, buffer, bufidx, &written);
638 if (!error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 *count += bufidx;
640 }
641 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
642 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000643
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000644 kmem_free(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 if (cur)
646 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
647 XFS_BTREE_NOERROR));
648 if (agbp)
649 xfs_buf_relse(agbp);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 return error;
652}