Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Dave Chinner | 70a9883 | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 20 | #include "xfs_shared.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 21 | #include "xfs_format.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_inode.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 26 | #include "xfs_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_ialloc.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 28 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_itable.h" |
| 30 | #include "xfs_error.h" |
Christoph Hellwig | f2d6761 | 2010-06-24 11:52:50 +1000 | [diff] [blame] | 31 | #include "xfs_trace.h" |
Dave Chinner | 33479e0 | 2012-10-08 21:56:11 +1100 | [diff] [blame] | 32 | #include "xfs_icache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 34 | STATIC int |
Vlad Apostolov | 6f1f216 | 2006-09-28 11:06:15 +1000 | [diff] [blame] | 35 | xfs_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 Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 40 | (xfs_sb_version_hasquota(&mp->m_sb) && |
Chandra Seetharaman | 9cad19d | 2013-06-27 17:25:04 -0500 | [diff] [blame] | 41 | xfs_is_quota_inode(&mp->m_sb, ino))); |
Vlad Apostolov | 6f1f216 | 2006-09-28 11:06:15 +1000 | [diff] [blame] | 42 | } |
| 43 | |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 44 | /* |
| 45 | * Return stat information for one inode. |
| 46 | * Return 0 if ok, else errno. |
| 47 | */ |
| 48 | int |
| 49 | xfs_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 Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 55 | int *ubused, /* bytes used by me */ |
| 56 | int *stat) /* BULKSTAT_RV_... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | { |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 58 | struct xfs_icdinode *dic; /* dinode core info pointer */ |
| 59 | struct xfs_inode *ip; /* incore inode pointer */ |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 60 | struct inode *inode; |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 61 | 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 Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 67 | return -EINVAL; |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 68 | |
Darrick J. Wong | f7ca352 | 2016-10-03 09:11:43 -0700 | [diff] [blame] | 69 | buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL); |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 70 | if (!buf) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 71 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Nathan Scott | 745b1f47 | 2006-09-28 11:02:23 +1000 | [diff] [blame] | 73 | error = xfs_iget(mp, NULL, ino, |
Dave Chinner | 5132ba8 | 2012-03-22 05:15:10 +0000 | [diff] [blame] | 74 | (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED), |
| 75 | XFS_ILOCK_SHARED, &ip); |
Jie Liu | 8fe6577 | 2014-07-24 11:33:28 +1000 | [diff] [blame] | 76 | if (error) |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 77 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | ASSERT(ip != NULL); |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 80 | ASSERT(ip->i_imap.im_blkno != 0); |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 81 | inode = VFS_I(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | dic = &ip->i_d; |
| 84 | |
| 85 | /* xfs_iget returns the following without needing |
| 86 | * further change. |
| 87 | */ |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 88 | buf->bs_projid_lo = dic->di_projid_lo; |
| 89 | buf->bs_projid_hi = dic->di_projid_hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | buf->bs_ino = ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | buf->bs_uid = dic->di_uid; |
| 92 | buf->bs_gid = dic->di_gid; |
| 93 | buf->bs_size = dic->di_size; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 94 | |
Dave Chinner | 54d7b5c | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 95 | buf->bs_nlink = inode->i_nlink; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 96 | 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 Chinner | 9e9a267 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 102 | buf->bs_gen = inode->i_generation; |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 103 | buf->bs_mode = inode->i_mode; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 Chinner | 07000ee | 2010-03-05 04:41:14 +0000 | [diff] [blame] | 112 | buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Darrick J. Wong | f7ca352 | 2016-10-03 09:11:43 -0700 | [diff] [blame] | 114 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | 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 Hellwig | f2d6761 | 2010-06-24 11:52:50 +1000 | [diff] [blame] | 139 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 140 | IRELE(ip); |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 141 | |
| 142 | error = formatter(buffer, ubsize, ubused, buf); |
Christoph Hellwig | 7dce11d | 2010-06-23 18:11:11 +1000 | [diff] [blame] | 143 | if (!error) |
| 144 | *stat = BULKSTAT_RV_DIDONE; |
| 145 | |
| 146 | out_free: |
| 147 | kmem_free(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return error; |
| 149 | } |
| 150 | |
sandeen@sandeen.net | 65fbaf2 | 2008-11-25 21:20:12 -0600 | [diff] [blame] | 151 | /* Return 0 on success or positive error */ |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 152 | STATIC int |
| 153 | xfs_bulkstat_one_fmt( |
| 154 | void __user *ubuffer, |
sandeen@sandeen.net | 65fbaf2 | 2008-11-25 21:20:12 -0600 | [diff] [blame] | 155 | int ubsize, |
| 156 | int *ubused, |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 157 | const xfs_bstat_t *buffer) |
| 158 | { |
sandeen@sandeen.net | 65fbaf2 | 2008-11-25 21:20:12 -0600 | [diff] [blame] | 159 | if (ubsize < sizeof(*buffer)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 160 | return -ENOMEM; |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 161 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 162 | return -EFAULT; |
sandeen@sandeen.net | 65fbaf2 | 2008-11-25 21:20:12 -0600 | [diff] [blame] | 163 | if (ubused) |
| 164 | *ubused = sizeof(*buffer); |
| 165 | return 0; |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 166 | } |
| 167 | |
sandeen@sandeen.net | 2ee4fa5 | 2008-11-25 21:20:11 -0600 | [diff] [blame] | 168 | int |
| 169 | xfs_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.net | 2ee4fa5 | 2008-11-25 21:20:11 -0600 | [diff] [blame] | 174 | int *ubused, /* bytes used by me */ |
sandeen@sandeen.net | 2ee4fa5 | 2008-11-25 21:20:11 -0600 | [diff] [blame] | 175 | int *stat) /* BULKSTAT_RV_... */ |
| 176 | { |
| 177 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 178 | xfs_bulkstat_one_fmt, ubused, stat); |
Nathan Scott | 8b56f08 | 2006-09-28 11:01:46 +1000 | [diff] [blame] | 179 | } |
| 180 | |
Jie Liu | 4b8fdfe | 2014-07-24 18:41:18 +1000 | [diff] [blame] | 181 | /* |
| 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 | */ |
| 185 | STATIC void |
| 186 | xfs_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 Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 212 | /* |
| 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 | */ |
| 218 | STATIC int |
| 219 | xfs_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 Sandeen | 5fb5aee | 2015-02-23 22:39:13 +1100 | [diff] [blame] | 242 | XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1); |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 243 | |
| 244 | /* Check if the record contains the inode in request */ |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 245 | if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) { |
| 246 | *icount = 0; |
| 247 | return 0; |
| 248 | } |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 249 | |
| 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 Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 265 | *icount = irec->ir_count - irec->ir_freecount; |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 271 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
| 272 | |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 273 | struct 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 Scott | 8b56f08 | 2006-09-28 11:01:46 +1000 | [diff] [blame] | 279 | /* |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 280 | * 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 Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 283 | static int |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 284 | xfs_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 Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 290 | struct xfs_bulkstat_agichunk *acp, |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 291 | xfs_agino_t *last_agino) |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 292 | { |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 293 | char __user **ubufp = acp->ac_ubuffer; |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 294 | int chunkidx; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 295 | int error = 0; |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 296 | xfs_agino_t agino = irbp->ir_startino; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 297 | |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 298 | for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK; |
| 299 | chunkidx++, agino++) { |
| 300 | int fmterror; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 301 | int ubused; |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 302 | |
| 303 | /* inode won't fit in buffer, we are done */ |
| 304 | if (acp->ac_ubleft < statstruct_size) |
| 305 | break; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 306 | |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 307 | /* Skip if this inode is free */ |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 308 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 309 | continue; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 310 | |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 311 | /* Get the inode and fill in a single buffer */ |
| 312 | ubused = statstruct_size; |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 313 | error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino), |
| 314 | *ubufp, acp->ac_ubleft, &ubused, &fmterror); |
| 315 | |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 316 | if (fmterror == BULKSTAT_RV_GIVEUP || |
| 317 | (error && error != -ENOENT && error != -EINVAL)) { |
| 318 | acp->ac_ubleft = 0; |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 319 | ASSERT(error); |
| 320 | break; |
| 321 | } |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 322 | |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 323 | /* be careful not to leak error if at end of chunk */ |
| 324 | if (fmterror == BULKSTAT_RV_NOTHING || error) { |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 325 | error = 0; |
| 326 | continue; |
| 327 | } |
| 328 | |
| 329 | *ubufp += ubused; |
| 330 | acp->ac_ubleft -= ubused; |
| 331 | acp->ac_ubelem++; |
Dave Chinner | 2b831ac | 2014-11-07 08:30:58 +1100 | [diff] [blame] | 332 | } |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 333 | |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 334 | /* |
| 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 Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 344 | return error; |
| 345 | } |
| 346 | |
| 347 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * Return stat information in bulk (by-inode) for the filesystem. |
| 349 | */ |
| 350 | int /* error status */ |
| 351 | xfs_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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | size_t statstruct_size, /* sizeof struct filling */ |
| 357 | char __user *ubuffer, /* buffer with inode stats */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 358 | int *done) /* 1 if there are more stats to get */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | xfs_buf_t *agbp; /* agi header buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | xfs_agino_t agino; /* inode # in allocation group */ |
| 362 | xfs_agnumber_t agno; /* allocation group number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ |
Nathan Scott | 26275093 | 2006-09-28 11:02:03 +1000 | [diff] [blame] | 364 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | int nirbuf; /* size of irbuf */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | int ubcount; /* size of user's buffer */ |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 367 | struct xfs_bulkstat_agichunk ac; |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 368 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | /* |
| 371 | * Get the last inode value, see if there's nothing to do. |
| 372 | */ |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 373 | agno = XFS_INO_TO_AGNO(mp, *lastinop); |
| 374 | agino = XFS_INO_TO_AGINO(mp, *lastinop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | if (agno >= mp->m_sb.sb_agcount || |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 376 | *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | *done = 1; |
| 378 | *ubcountp = 0; |
| 379 | return 0; |
| 380 | } |
Jie Liu | 296dfd7 | 2014-07-24 18:40:26 +1000 | [diff] [blame] | 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | ubcount = *ubcountp; /* statstruct's */ |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 383 | ac.ac_ubuffer = &ubuffer; |
| 384 | ac.ac_ubleft = ubcount * statstruct_size; /* bytes */; |
| 385 | ac.ac_ubelem = 0; |
| 386 | |
| 387 | *ubcountp = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | *done = 0; |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 389 | |
Darrick J. Wong | 08b005f | 2017-03-06 11:58:20 -0800 | [diff] [blame] | 390 | irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP); |
Christoph Hellwig | bdfb043 | 2010-01-20 21:55:30 +0000 | [diff] [blame] | 391 | if (!irbuf) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 392 | return -ENOMEM; |
Darrick J. Wong | 08b005f | 2017-03-06 11:58:20 -0800 | [diff] [blame] | 393 | nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf); |
Nathan Scott | bb3c7d2 | 2006-09-28 11:02:09 +1000 | [diff] [blame] | 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /* |
| 396 | * Loop over the allocation groups, starting from the last |
| 397 | * inode returned; 0 means start of the allocation group. |
| 398 | */ |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 399 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
Jie Liu | d4c2734 | 2014-07-24 18:40:43 +1000 | [diff] [blame] | 407 | if (error) |
| 408 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | /* |
| 410 | * Allocate and initialize a btree cursor for ialloc btree. |
| 411 | */ |
Brian Foster | 57bd3db | 2014-04-24 16:00:50 +1000 | [diff] [blame] | 412 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
| 413 | XFS_BTNUM_INO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | if (agino > 0) { |
| 415 | /* |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 416 | * In the middle of an allocation group, we need to get |
| 417 | * the remainder of the chunk we're in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | */ |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 419 | struct xfs_inobt_rec_incore r; |
| 420 | |
| 421 | error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r); |
| 422 | if (error) |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 423 | goto del_cursor; |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 424 | if (icount) { |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 425 | irbp->ir_startino = r.ir_startino; |
Brian Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 426 | irbp->ir_holemask = r.ir_holemask; |
| 427 | irbp->ir_count = r.ir_count; |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 428 | irbp->ir_freecount = r.ir_freecount; |
| 429 | irbp->ir_free = r.ir_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | irbp++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 432 | /* Increment to the next record */ |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 433 | error = xfs_btree_increment(cur, 0, &stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } else { |
Jie Liu | f3d1e58 | 2014-07-24 18:42:21 +1000 | [diff] [blame] | 435 | /* Start of ag. Lookup the first inode chunk */ |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 436 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 438 | if (error || stat == 0) { |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 439 | end_of_ag = true; |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 440 | goto del_cursor; |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 441 | } |
Jie Liu | d4c2734 | 2014-07-24 18:40:43 +1000 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* |
| 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 Liu | d4c2734 | 2014-07-24 18:40:43 +1000 | [diff] [blame] | 448 | struct xfs_inobt_rec_incore r; |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 449 | |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 450 | error = xfs_inobt_get_rec(cur, &r, &stat); |
| 451 | if (error || stat == 0) { |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 452 | end_of_ag = true; |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 453 | goto del_cursor; |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 454 | } |
| 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | /* |
| 457 | * If this chunk has any allocated inodes, save it. |
Nathan Scott | 26275093 | 2006-09-28 11:02:03 +1000 | [diff] [blame] | 458 | * Also start read-ahead now for this chunk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | */ |
Brian Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 460 | if (r.ir_freecount < r.ir_count) { |
Jie Liu | 4b8fdfe | 2014-07-24 18:41:18 +1000 | [diff] [blame] | 461 | xfs_bulkstat_ichunk_ra(mp, agno, &r); |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 462 | irbp->ir_startino = r.ir_startino; |
Brian Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 463 | irbp->ir_holemask = r.ir_holemask; |
| 464 | irbp->ir_count = r.ir_count; |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 465 | irbp->ir_freecount = r.ir_freecount; |
| 466 | irbp->ir_free = r.ir_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | irbp++; |
Brian Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 468 | icount += r.ir_count - r.ir_freecount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
Dave Chinner | afa947c | 2014-11-07 08:29:57 +1100 | [diff] [blame] | 470 | error = xfs_btree_increment(cur, 0, &stat); |
| 471 | if (error || stat == 0) { |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 472 | end_of_ag = true; |
Jan Kara | 7a19dee | 2014-10-30 10:34:52 +1100 | [diff] [blame] | 473 | goto del_cursor; |
| 474 | } |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 475 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /* |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 479 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | */ |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 483 | del_cursor: |
Brian Foster | f307080 | 2015-08-19 10:00:53 +1000 | [diff] [blame] | 484 | xfs_btree_del_cursor(cur, error ? |
| 485 | XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | xfs_buf_relse(agbp); |
Dave Chinner | a6bbce5 | 2014-10-29 08:22:18 +1100 | [diff] [blame] | 487 | if (error) |
| 488 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | /* |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 490 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | */ |
| 494 | irbufend = irbp; |
| 495 | for (irbp = irbuf; |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 496 | irbp < irbufend && ac.ac_ubleft >= statstruct_size; |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 497 | irbp++) { |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 498 | error = xfs_bulkstat_ag_ichunk(mp, agno, irbp, |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 499 | formatter, statstruct_size, &ac, |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 500 | &agino); |
Jie Liu | 1e773c4 | 2014-08-04 11:22:31 +1000 | [diff] [blame] | 501 | if (error) |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 502 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 504 | cond_resched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 506 | |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 507 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | break; |
Dave Chinner | 6e57c542 | 2014-11-07 08:31:13 +1100 | [diff] [blame] | 513 | |
| 514 | if (end_of_ag) { |
| 515 | agno++; |
| 516 | agino = 0; |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 517 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | } |
| 519 | /* |
| 520 | * Done, we're either out of filesystem or space to put the data. |
| 521 | */ |
Dave Chinner | fdd3cce | 2013-09-02 20:53:00 +1000 | [diff] [blame] | 522 | kmem_free(irbuf); |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 523 | *ubcountp = ac.ac_ubelem; |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 524 | |
Lachlan McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 525 | /* |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 526 | * 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 McIlroy | cd57e59 | 2007-11-23 16:30:32 +1100 | [diff] [blame] | 531 | */ |
Dave Chinner | bf4a5af | 2014-11-07 08:30:30 +1100 | [diff] [blame] | 532 | if (ac.ac_ubelem) |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 533 | error = 0; |
| 534 | |
Dave Chinner | 0027589 | 2014-11-07 08:33:52 +1100 | [diff] [blame] | 535 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | *done = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Dave Chinner | febe3cb | 2014-11-07 08:31:15 +1100 | [diff] [blame] | 543 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 546 | int |
| 547 | xfs_inumbers_fmt( |
| 548 | void __user *ubuffer, /* buffer to write to */ |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 549 | const struct xfs_inogrp *buffer, /* buffer to read from */ |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 550 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | /* |
| 560 | * Return inode number table for the filesystem. |
| 561 | */ |
| 562 | int /* error status */ |
| 563 | xfs_inumbers( |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 564 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | { |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 570 | 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 Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 573 | struct xfs_buf *agbp = NULL; |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 574 | struct xfs_inogrp *buffer; |
| 575 | int bcount; |
| 576 | int left = *count; |
| 577 | int bufidx = 0; |
| 578 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | *count = 0; |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 581 | if (agno >= mp->m_sb.sb_agcount || |
| 582 | *lastino != XFS_AGINO_TO_INO(mp, agno, agino)) |
| 583 | return error; |
| 584 | |
Tim Shimmin | e6a4b37 | 2007-11-23 16:30:42 +1100 | [diff] [blame] | 585 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 587 | do { |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 588 | struct xfs_inobt_rec_incore r; |
| 589 | int stat; |
| 590 | |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 591 | if (!agbp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 593 | if (error) |
| 594 | break; |
| 595 | |
Brian Foster | 57bd3db | 2014-04-24 16:00:50 +1000 | [diff] [blame] | 596 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
| 597 | XFS_BTNUM_INO); |
Christoph Hellwig | 2187550 | 2009-08-31 20:58:21 -0300 | [diff] [blame] | 598 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 599 | &stat); |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 600 | if (error) |
| 601 | break; |
| 602 | if (!stat) |
| 603 | goto next_ag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 605 | |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 606 | error = xfs_inobt_get_rec(cur, &r, &stat); |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 607 | if (error) |
| 608 | break; |
| 609 | if (!stat) |
| 610 | goto next_ag; |
| 611 | |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 612 | 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 Foster | 12d0714 | 2015-05-29 09:04:19 +1000 | [diff] [blame] | 615 | buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount; |
Christoph Hellwig | 2e287a7 | 2009-08-31 20:56:58 -0300 | [diff] [blame] | 616 | buffer[bufidx].xi_allocmask = ~r.ir_free; |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 617 | if (++bufidx == bcount) { |
| 618 | long written; |
| 619 | |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 620 | error = formatter(ubuffer, buffer, bufidx, &written); |
| 621 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | break; |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 623 | ubuffer += written; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | *count += bufidx; |
| 625 | bufidx = 0; |
| 626 | } |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 627 | if (!--left) |
| 628 | break; |
| 629 | |
| 630 | error = xfs_btree_increment(cur, 0, &stat); |
| 631 | if (error) |
| 632 | break; |
| 633 | if (stat) |
| 634 | continue; |
| 635 | |
| 636 | next_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 Sandeen | a8b1ee8 | 2014-10-13 10:21:53 +1100 | [diff] [blame] | 642 | agno++; |
| 643 | } while (agno < mp->m_sb.sb_agcount); |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | if (!error) { |
| 646 | if (bufidx) { |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 647 | long written; |
| 648 | |
Jie Liu | 549fa00 | 2014-07-24 12:11:47 +1000 | [diff] [blame] | 649 | error = formatter(ubuffer, buffer, bufidx, &written); |
| 650 | if (!error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | *count += bufidx; |
| 652 | } |
| 653 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); |
| 654 | } |
Jie Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 655 | |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 656 | kmem_free(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | 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 Liu | c7cb51d | 2014-07-24 12:18:47 +1000 | [diff] [blame] | 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | return error; |
| 664 | } |