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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 Chinner70a98832013-10-23 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 */
Dave Chinner39878482016-02-09 16:54:58 +110060 struct inode *inode;
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100061 struct xfs_bstat *buf; /* return buffer */
62 int error = 0; /* error value */
63
64 *stat = BULKSTAT_RV_NOTHING;
65
66 if (!buffer || xfs_internal_inum(mp, ino))
Dave Chinner24513372014-06-25 14:58:08 +100067 return -EINVAL;
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100068
Darrick J. Wongf7ca3522016-10-03 09:11:43 -070069 buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100070 if (!buf)
Dave Chinner24513372014-06-25 14:58:08 +100071 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Nathan Scott745b1f472006-09-28 11:02:23 +100073 error = xfs_iget(mp, NULL, ino,
Dave Chinner5132ba82012-03-22 05:15:10 +000074 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
75 XFS_ILOCK_SHARED, &ip);
Jie Liu8fe65772014-07-24 11:33:28 +100076 if (error)
Christoph Hellwig7dce11d2010-06-23 18:11:11 +100077 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 ASSERT(ip != NULL);
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110080 ASSERT(ip->i_imap.im_blkno != 0);
Dave Chinner39878482016-02-09 16:54:58 +110081 inode = VFS_I(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83 dic = &ip->i_d;
84
85 /* xfs_iget returns the following without needing
86 * further change.
87 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +000088 buf->bs_projid_lo = dic->di_projid_lo;
89 buf->bs_projid_hi = dic->di_projid_hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 buf->bs_ino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 buf->bs_uid = dic->di_uid;
92 buf->bs_gid = dic->di_gid;
93 buf->bs_size = dic->di_size;
Dave Chinner39878482016-02-09 16:54:58 +110094
Dave Chinner54d7b5c2016-02-09 16:54:58 +110095 buf->bs_nlink = inode->i_nlink;
Dave Chinner39878482016-02-09 16:54:58 +110096 buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
97 buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
98 buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
99 buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
100 buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
101 buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
Dave Chinner9e9a2672016-02-09 16:54:58 +1100102 buf->bs_gen = inode->i_generation;
Dave Chinnerc19b3b052016-02-09 16:54:58 +1100103 buf->bs_mode = inode->i_mode;
Dave Chinner39878482016-02-09 16:54:58 +1100104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 buf->bs_xflags = xfs_ip2xflags(ip);
106 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
107 buf->bs_extents = dic->di_nextents;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 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
Darrick J. Wongf7ca3522016-10-03 09:11:43 -0700114 if (dic->di_version == 3) {
115 if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
116 buf->bs_cowextsize = dic->di_cowextsize <<
117 mp->m_sb.sb_blocklog;
118 }
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 switch (dic->di_format) {
121 case XFS_DINODE_FMT_DEV:
122 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
123 buf->bs_blksize = BLKDEV_IOSIZE;
124 buf->bs_blocks = 0;
125 break;
126 case XFS_DINODE_FMT_LOCAL:
127 case XFS_DINODE_FMT_UUID:
128 buf->bs_rdev = 0;
129 buf->bs_blksize = mp->m_sb.sb_blocksize;
130 buf->bs_blocks = 0;
131 break;
132 case XFS_DINODE_FMT_EXTENTS:
133 case XFS_DINODE_FMT_BTREE:
134 buf->bs_rdev = 0;
135 buf->bs_blksize = mp->m_sb.sb_blocksize;
136 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
137 break;
138 }
Christoph Hellwigf2d67612010-06-24 11:52:50 +1000139 xfs_iunlock(ip, XFS_ILOCK_SHARED);
140 IRELE(ip);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000141
142 error = formatter(buffer, ubsize, ubused, buf);
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000143 if (!error)
144 *stat = BULKSTAT_RV_DIDONE;
145
146 out_free:
147 kmem_free(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 return error;
149}
150
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600151/* Return 0 on success or positive error */
Michal Marekfaa63e92007-07-11 11:10:19 +1000152STATIC int
153xfs_bulkstat_one_fmt(
154 void __user *ubuffer,
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600155 int ubsize,
156 int *ubused,
Michal Marekfaa63e92007-07-11 11:10:19 +1000157 const xfs_bstat_t *buffer)
158{
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600159 if (ubsize < sizeof(*buffer))
Dave Chinner24513372014-06-25 14:58:08 +1000160 return -ENOMEM;
Michal Marekfaa63e92007-07-11 11:10:19 +1000161 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
Dave Chinner24513372014-06-25 14:58:08 +1000162 return -EFAULT;
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600163 if (ubused)
164 *ubused = sizeof(*buffer);
165 return 0;
Michal Marekfaa63e92007-07-11 11:10:19 +1000166}
167
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600168int
169xfs_bulkstat_one(
170 xfs_mount_t *mp, /* mount point for filesystem */
171 xfs_ino_t ino, /* inode number to get data for */
172 void __user *buffer, /* buffer to place output in */
173 int ubsize, /* size of buffer */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600174 int *ubused, /* bytes used by me */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600175 int *stat) /* BULKSTAT_RV_... */
176{
177 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
Dave Chinner7b6259e2010-06-24 11:35:17 +1000178 xfs_bulkstat_one_fmt, ubused, stat);
Nathan Scott8b56f082006-09-28 11:01:46 +1000179}
180
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000181/*
182 * Loop over all clusters in a chunk for a given incore inode allocation btree
183 * record. Do a readahead if there are any allocated inodes in that cluster.
184 */
185STATIC void
186xfs_bulkstat_ichunk_ra(
187 struct xfs_mount *mp,
188 xfs_agnumber_t agno,
189 struct xfs_inobt_rec_incore *irec)
190{
191 xfs_agblock_t agbno;
192 struct blk_plug plug;
193 int blks_per_cluster;
194 int inodes_per_cluster;
195 int i; /* inode chunk index */
196
197 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
198 blks_per_cluster = xfs_icluster_size_fsb(mp);
199 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
200
201 blk_start_plug(&plug);
202 for (i = 0; i < XFS_INODES_PER_CHUNK;
203 i += inodes_per_cluster, agbno += blks_per_cluster) {
204 if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
205 xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
206 &xfs_inode_buf_ops);
207 }
208 }
209 blk_finish_plug(&plug);
210}
211
Jie Liuf3d1e582014-07-24 18:42:21 +1000212/*
213 * Lookup the inode chunk that the given inode lives in and then get the record
214 * if we found the chunk. If the inode was not the last in the chunk and there
215 * are some left allocated, update the data for the pointed-to record as well as
216 * return the count of grabbed inodes.
217 */
218STATIC int
219xfs_bulkstat_grab_ichunk(
220 struct xfs_btree_cur *cur, /* btree cursor */
221 xfs_agino_t agino, /* starting inode of chunk */
222 int *icount,/* return # of inodes grabbed */
223 struct xfs_inobt_rec_incore *irec) /* btree record */
224{
225 int idx; /* index into inode chunk */
226 int stat;
227 int error = 0;
228
229 /* Lookup the inode chunk that this inode lives in */
230 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
231 if (error)
232 return error;
233 if (!stat) {
234 *icount = 0;
235 return error;
236 }
237
238 /* Get the record, should always work */
239 error = xfs_inobt_get_rec(cur, irec, &stat);
240 if (error)
241 return error;
Eric Sandeen5fb5aee2015-02-23 22:39:13 +1100242 XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
Jie Liuf3d1e582014-07-24 18:42:21 +1000243
244 /* Check if the record contains the inode in request */
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100245 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
246 *icount = 0;
247 return 0;
248 }
Jie Liuf3d1e582014-07-24 18:42:21 +1000249
250 idx = agino - irec->ir_startino + 1;
251 if (idx < XFS_INODES_PER_CHUNK &&
252 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
253 int i;
254
255 /* We got a right chunk with some left inodes allocated at it.
256 * Grab the chunk record. Mark all the uninteresting inodes
257 * free -- because they're before our start point.
258 */
259 for (i = 0; i < idx; i++) {
260 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
261 irec->ir_freecount++;
262 }
263
264 irec->ir_free |= xfs_inobt_maskn(0, idx);
Brian Foster12d07142015-05-29 09:04:19 +1000265 *icount = irec->ir_count - irec->ir_freecount;
Jie Liuf3d1e582014-07-24 18:42:21 +1000266 }
267
268 return 0;
269}
270
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100271#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
272
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100273struct xfs_bulkstat_agichunk {
274 char __user **ac_ubuffer;/* pointer into user's buffer */
275 int ac_ubleft; /* bytes left in user's buffer */
276 int ac_ubelem; /* spaces used in user's buffer */
277};
278
Nathan Scott8b56f082006-09-28 11:01:46 +1000279/*
Jie Liu1e773c42014-08-04 11:22:31 +1000280 * Process inodes in chunk with a pointer to a formatter function
281 * that will iget the inode and fill in the appropriate structure.
282 */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100283static int
Jie Liu1e773c42014-08-04 11:22:31 +1000284xfs_bulkstat_ag_ichunk(
285 struct xfs_mount *mp,
286 xfs_agnumber_t agno,
287 struct xfs_inobt_rec_incore *irbp,
288 bulkstat_one_pf formatter,
289 size_t statstruct_size,
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100290 struct xfs_bulkstat_agichunk *acp,
Dave Chinner00275892014-11-07 08:33:52 +1100291 xfs_agino_t *last_agino)
Jie Liu1e773c42014-08-04 11:22:31 +1000292{
Jie Liu1e773c42014-08-04 11:22:31 +1000293 char __user **ubufp = acp->ac_ubuffer;
Dave Chinner2b831ac2014-11-07 08:30:58 +1100294 int chunkidx;
Jie Liu1e773c42014-08-04 11:22:31 +1000295 int error = 0;
Dave Chinner00275892014-11-07 08:33:52 +1100296 xfs_agino_t agino = irbp->ir_startino;
Jie Liu1e773c42014-08-04 11:22:31 +1000297
Dave Chinner2b831ac2014-11-07 08:30:58 +1100298 for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
299 chunkidx++, agino++) {
300 int fmterror;
Jie Liu1e773c42014-08-04 11:22:31 +1000301 int ubused;
Dave Chinner00275892014-11-07 08:33:52 +1100302
303 /* inode won't fit in buffer, we are done */
304 if (acp->ac_ubleft < statstruct_size)
305 break;
Jie Liu1e773c42014-08-04 11:22:31 +1000306
Jie Liu1e773c42014-08-04 11:22:31 +1000307 /* Skip if this inode is free */
Dave Chinner00275892014-11-07 08:33:52 +1100308 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
Jie Liu1e773c42014-08-04 11:22:31 +1000309 continue;
Jie Liu1e773c42014-08-04 11:22:31 +1000310
Jie Liu1e773c42014-08-04 11:22:31 +1000311 /* Get the inode and fill in a single buffer */
312 ubused = statstruct_size;
Dave Chinner00275892014-11-07 08:33:52 +1100313 error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
314 *ubufp, acp->ac_ubleft, &ubused, &fmterror);
315
Dave Chinner2b831ac2014-11-07 08:30:58 +1100316 if (fmterror == BULKSTAT_RV_GIVEUP ||
317 (error && error != -ENOENT && error != -EINVAL)) {
318 acp->ac_ubleft = 0;
Jie Liu1e773c42014-08-04 11:22:31 +1000319 ASSERT(error);
320 break;
321 }
Jie Liu1e773c42014-08-04 11:22:31 +1000322
Dave Chinner2b831ac2014-11-07 08:30:58 +1100323 /* be careful not to leak error if at end of chunk */
324 if (fmterror == BULKSTAT_RV_NOTHING || error) {
Dave Chinner2b831ac2014-11-07 08:30:58 +1100325 error = 0;
326 continue;
327 }
328
329 *ubufp += ubused;
330 acp->ac_ubleft -= ubused;
331 acp->ac_ubelem++;
Dave Chinner2b831ac2014-11-07 08:30:58 +1100332 }
Jie Liu1e773c42014-08-04 11:22:31 +1000333
Dave Chinner00275892014-11-07 08:33:52 +1100334 /*
335 * Post-update *last_agino. At this point, agino will always point one
336 * inode past the last inode we processed successfully. Hence we
337 * substract that inode when setting the *last_agino cursor so that we
338 * return the correct cookie to userspace. On the next bulkstat call,
339 * the inode under the lastino cookie will be skipped as we have already
340 * processed it here.
341 */
342 *last_agino = agino - 1;
343
Jie Liu1e773c42014-08-04 11:22:31 +1000344 return error;
345}
346
347/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 * Return stat information in bulk (by-inode) for the filesystem.
349 */
350int /* error status */
351xfs_bulkstat(
352 xfs_mount_t *mp, /* mount point for filesystem */
353 xfs_ino_t *lastinop, /* last inode returned */
354 int *ubcountp, /* size of buffer/count returned */
355 bulkstat_one_pf formatter, /* func that'd fill a single buf */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 size_t statstruct_size, /* sizeof struct filling */
357 char __user *ubuffer, /* buffer with inode stats */
Nathan Scottc41564b2006-03-29 08:55:14 +1000358 int *done) /* 1 if there are more stats to get */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 xfs_buf_t *agbp; /* agi header buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 xfs_agino_t agino; /* inode # in allocation group */
362 xfs_agnumber_t agno; /* allocation group number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
Nathan Scott262750932006-09-28 11:02:03 +1000364 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 int nirbuf; /* size of irbuf */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 int ubcount; /* size of user's buffer */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100367 struct xfs_bulkstat_agichunk ac;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100368 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 /*
371 * Get the last inode value, see if there's nothing to do.
372 */
Dave Chinner00275892014-11-07 08:33:52 +1100373 agno = XFS_INO_TO_AGNO(mp, *lastinop);
374 agino = XFS_INO_TO_AGINO(mp, *lastinop);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 if (agno >= mp->m_sb.sb_agcount ||
Dave Chinner00275892014-11-07 08:33:52 +1100376 *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 *done = 1;
378 *ubcountp = 0;
379 return 0;
380 }
Jie Liu296dfd72014-07-24 18:40:26 +1000381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 ubcount = *ubcountp; /* statstruct's */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100383 ac.ac_ubuffer = &ubuffer;
384 ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
385 ac.ac_ubelem = 0;
386
387 *ubcountp = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 *done = 0;
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100389
Darrick J. Wong08b005f2017-03-06 11:58:20 -0800390 irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP);
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000391 if (!irbuf)
Dave Chinner24513372014-06-25 14:58:08 +1000392 return -ENOMEM;
Darrick J. Wong08b005f2017-03-06 11:58:20 -0800393 nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf);
Nathan Scottbb3c7d22006-09-28 11:02:09 +1000394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 /*
396 * Loop over the allocation groups, starting from the last
397 * inode returned; 0 means start of the allocation group.
398 */
Dave Chinner6e57c5422014-11-07 08:31:13 +1100399 while (agno < mp->m_sb.sb_agcount) {
400 struct xfs_inobt_rec_incore *irbp = irbuf;
401 struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf;
402 bool end_of_ag = false;
403 int icount = 0;
404 int stat;
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liud4c27342014-07-24 18:40:43 +1000407 if (error)
408 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 /*
410 * Allocate and initialize a btree cursor for ialloc btree.
411 */
Brian Foster57bd3db2014-04-24 16:00:50 +1000412 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
413 XFS_BTNUM_INO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 if (agino > 0) {
415 /*
Jie Liuf3d1e582014-07-24 18:42:21 +1000416 * In the middle of an allocation group, we need to get
417 * the remainder of the chunk we're in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 */
Jie Liuf3d1e582014-07-24 18:42:21 +1000419 struct xfs_inobt_rec_incore r;
420
421 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
422 if (error)
Dave Chinnera6bbce52014-10-29 08:22:18 +1100423 goto del_cursor;
Jie Liuf3d1e582014-07-24 18:42:21 +1000424 if (icount) {
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300425 irbp->ir_startino = r.ir_startino;
Brian Foster12d07142015-05-29 09:04:19 +1000426 irbp->ir_holemask = r.ir_holemask;
427 irbp->ir_count = r.ir_count;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300428 irbp->ir_freecount = r.ir_freecount;
429 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 irbp++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 }
Jie Liuf3d1e582014-07-24 18:42:21 +1000432 /* Increment to the next record */
Dave Chinnerafa947c2014-11-07 08:29:57 +1100433 error = xfs_btree_increment(cur, 0, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 } else {
Jie Liuf3d1e582014-07-24 18:42:21 +1000435 /* Start of ag. Lookup the first inode chunk */
Dave Chinnerafa947c2014-11-07 08:29:57 +1100436 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
Dave Chinnerafa947c2014-11-07 08:29:57 +1100438 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100439 end_of_ag = true;
Dave Chinnera6bbce52014-10-29 08:22:18 +1100440 goto del_cursor;
Dave Chinnerafa947c2014-11-07 08:29:57 +1100441 }
Jie Liud4c27342014-07-24 18:40:43 +1000442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 /*
444 * Loop through inode btree records in this ag,
445 * until we run out of inodes or space in the buffer.
446 */
447 while (irbp < irbufend && icount < ubcount) {
Jie Liud4c27342014-07-24 18:40:43 +1000448 struct xfs_inobt_rec_incore r;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300449
Dave Chinnerafa947c2014-11-07 08:29:57 +1100450 error = xfs_inobt_get_rec(cur, &r, &stat);
451 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100452 end_of_ag = true;
Dave Chinnera6bbce52014-10-29 08:22:18 +1100453 goto del_cursor;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300454 }
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 /*
457 * If this chunk has any allocated inodes, save it.
Nathan Scott262750932006-09-28 11:02:03 +1000458 * Also start read-ahead now for this chunk.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 */
Brian Foster12d07142015-05-29 09:04:19 +1000460 if (r.ir_freecount < r.ir_count) {
Jie Liu4b8fdfe2014-07-24 18:41:18 +1000461 xfs_bulkstat_ichunk_ra(mp, agno, &r);
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300462 irbp->ir_startino = r.ir_startino;
Brian Foster12d07142015-05-29 09:04:19 +1000463 irbp->ir_holemask = r.ir_holemask;
464 irbp->ir_count = r.ir_count;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300465 irbp->ir_freecount = r.ir_freecount;
466 irbp->ir_free = r.ir_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 irbp++;
Brian Foster12d07142015-05-29 09:04:19 +1000468 icount += r.ir_count - r.ir_freecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 }
Dave Chinnerafa947c2014-11-07 08:29:57 +1100470 error = xfs_btree_increment(cur, 0, &stat);
471 if (error || stat == 0) {
Dave Chinner6e57c5422014-11-07 08:31:13 +1100472 end_of_ag = true;
Jan Kara7a19dee2014-10-30 10:34:52 +1100473 goto del_cursor;
474 }
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100475 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 }
Dave Chinnera6bbce52014-10-29 08:22:18 +1100477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 /*
Dave Chinnera6bbce52014-10-29 08:22:18 +1100479 * Drop the btree buffers and the agi buffer as we can't hold any
480 * of the locks these represent when calling iget. If there is a
481 * pending error, then we are done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 */
Dave Chinnera6bbce52014-10-29 08:22:18 +1100483del_cursor:
Brian Fosterf3070802015-08-19 10:00:53 +1000484 xfs_btree_del_cursor(cur, error ?
485 XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 xfs_buf_relse(agbp);
Dave Chinnera6bbce52014-10-29 08:22:18 +1100487 if (error)
488 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 /*
Dave Chinner00275892014-11-07 08:33:52 +1100490 * Now format all the good inodes into the user's buffer. The
491 * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
492 * for the next loop iteration.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 */
494 irbufend = irbp;
495 for (irbp = irbuf;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100496 irbp < irbufend && ac.ac_ubleft >= statstruct_size;
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100497 irbp++) {
Jie Liu1e773c42014-08-04 11:22:31 +1000498 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100499 formatter, statstruct_size, &ac,
Dave Chinner00275892014-11-07 08:33:52 +1100500 &agino);
Jie Liu1e773c42014-08-04 11:22:31 +1000501 if (error)
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100502 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100504 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100506
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100507 /*
508 * If we've run out of space or had a formatting error, we
509 * are now done
510 */
511 if (ac.ac_ubleft < statstruct_size || error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 break;
Dave Chinner6e57c5422014-11-07 08:31:13 +1100513
514 if (end_of_ag) {
515 agno++;
516 agino = 0;
Dave Chinner00275892014-11-07 08:33:52 +1100517 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519 /*
520 * Done, we're either out of filesystem or space to put the data.
521 */
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000522 kmem_free(irbuf);
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100523 *ubcountp = ac.ac_ubelem;
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100524
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100525 /*
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100526 * We found some inodes, so clear the error status and return them.
527 * The lastino pointer will point directly at the inode that triggered
528 * any error that occurred, so on the next call the error will be
529 * triggered again and propagated to userspace as there will be no
530 * formatted inodes in the buffer.
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100531 */
Dave Chinnerbf4a5af2014-11-07 08:30:30 +1100532 if (ac.ac_ubelem)
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100533 error = 0;
534
Dave Chinner00275892014-11-07 08:33:52 +1100535 /*
536 * If we ran out of filesystem, lastino will point off the end of
537 * the filesystem so the next call will return immediately.
538 */
539 *lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
540 if (agno >= mp->m_sb.sb_agcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 *done = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
Dave Chinnerfebe3cb2014-11-07 08:31:15 +1100543 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544}
545
Michal Marekfaa63e92007-07-11 11:10:19 +1000546int
547xfs_inumbers_fmt(
548 void __user *ubuffer, /* buffer to write to */
Jie Liu549fa002014-07-24 12:11:47 +1000549 const struct xfs_inogrp *buffer, /* buffer to read from */
Michal Marekfaa63e92007-07-11 11:10:19 +1000550 long count, /* # of elements to read */
551 long *written) /* # of bytes written */
552{
553 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
554 return -EFAULT;
555 *written = count * sizeof(*buffer);
556 return 0;
557}
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559/*
560 * Return inode number table for the filesystem.
561 */
562int /* error status */
563xfs_inumbers(
Jie Liu549fa002014-07-24 12:11:47 +1000564 struct xfs_mount *mp,/* mount point for filesystem */
565 xfs_ino_t *lastino,/* last inode returned */
566 int *count,/* size of buffer/count returned */
567 void __user *ubuffer,/* buffer with inode descriptions */
568 inumbers_fmt_pf formatter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
Jie Liu549fa002014-07-24 12:11:47 +1000570 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
571 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
572 struct xfs_btree_cur *cur = NULL;
Jie Liuc7cb51d2014-07-24 12:18:47 +1000573 struct xfs_buf *agbp = NULL;
Jie Liu549fa002014-07-24 12:11:47 +1000574 struct xfs_inogrp *buffer;
575 int bcount;
576 int left = *count;
577 int bufidx = 0;
578 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 *count = 0;
Jie Liu549fa002014-07-24 12:11:47 +1000581 if (agno >= mp->m_sb.sb_agcount ||
582 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
583 return error;
584
Tim Shimmine6a4b372007-11-23 16:30:42 +1100585 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000587 do {
Jie Liu549fa002014-07-24 12:11:47 +1000588 struct xfs_inobt_rec_incore r;
589 int stat;
590
Jie Liuc7cb51d2014-07-24 12:18:47 +1000591 if (!agbp) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000593 if (error)
594 break;
595
Brian Foster57bd3db2014-04-24 16:00:50 +1000596 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
597 XFS_BTNUM_INO);
Christoph Hellwig21875502009-08-31 20:58:21 -0300598 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
Jie Liu549fa002014-07-24 12:11:47 +1000599 &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000600 if (error)
601 break;
602 if (!stat)
603 goto next_ag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 }
Jie Liuc7cb51d2014-07-24 12:18:47 +1000605
Jie Liu549fa002014-07-24 12:11:47 +1000606 error = xfs_inobt_get_rec(cur, &r, &stat);
Jie Liuc7cb51d2014-07-24 12:18:47 +1000607 if (error)
608 break;
609 if (!stat)
610 goto next_ag;
611
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300612 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
613 buffer[bufidx].xi_startino =
614 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
Brian Foster12d07142015-05-29 09:04:19 +1000615 buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount;
Christoph Hellwig2e287a72009-08-31 20:56:58 -0300616 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}