Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 | */ |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 20 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_trans.h" |
| 26 | #include "xfs_sb.h" |
| 27 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_dir2.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 30 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_bmap_btree.h" |
| 32 | #include "xfs_ialloc_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_dinode.h" |
| 34 | #include "xfs_inode.h" |
| 35 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_itable.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_ialloc.h" |
| 38 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_bmap.h" |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 40 | #include "xfs_acl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_attr.h" |
| 42 | #include "xfs_rw.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include "xfs_quota.h" |
| 45 | #include "xfs_utils.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 46 | #include "xfs_rtalloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "xfs_trans_space.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include "xfs_log_priv.h" |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 49 | #include "xfs_filestream.h" |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 50 | #include "xfs_vnodeops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 51 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* |
Nathan Scott | 7d4fb40 | 2006-06-09 15:27:16 +1000 | [diff] [blame] | 54 | * The maximum pathlen is 1024 bytes. Since the minimum file system |
| 55 | * blocksize is 512 bytes, we can get a max of 2 extents back from |
| 56 | * bmapi. |
| 57 | */ |
| 58 | #define SYMLINK_MAPS 2 |
| 59 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 60 | STATIC int |
| 61 | xfs_readlink_bmap( |
| 62 | xfs_inode_t *ip, |
| 63 | char *link) |
| 64 | { |
| 65 | xfs_mount_t *mp = ip->i_mount; |
| 66 | int pathlen = ip->i_d.di_size; |
| 67 | int nmaps = SYMLINK_MAPS; |
| 68 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 69 | xfs_daddr_t d; |
| 70 | int byte_cnt; |
| 71 | int n; |
| 72 | xfs_buf_t *bp; |
| 73 | int error = 0; |
| 74 | |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 75 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, pathlen), mval, &nmaps, |
| 76 | 0); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 77 | if (error) |
| 78 | goto out; |
| 79 | |
| 80 | for (n = 0; n < nmaps; n++) { |
| 81 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| 82 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| 83 | |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 84 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), |
| 85 | XBF_LOCK | XBF_MAPPED | XBF_DONT_BLOCK); |
Chandra Seetharaman | ac4d688 | 2011-08-03 02:18:29 +0000 | [diff] [blame] | 86 | if (!bp) |
| 87 | return XFS_ERROR(ENOMEM); |
Chandra Seetharaman | e570280 | 2011-08-03 02:18:34 +0000 | [diff] [blame] | 88 | error = bp->b_error; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 89 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 90 | xfs_buf_ioerror_alert(bp, __func__); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 91 | xfs_buf_relse(bp); |
| 92 | goto out; |
| 93 | } |
| 94 | if (pathlen < byte_cnt) |
| 95 | byte_cnt = pathlen; |
| 96 | pathlen -= byte_cnt; |
| 97 | |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 98 | memcpy(link, bp->b_addr, byte_cnt); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 99 | xfs_buf_relse(bp); |
| 100 | } |
| 101 | |
| 102 | link[ip->i_d.di_size] = '\0'; |
| 103 | error = 0; |
| 104 | |
| 105 | out: |
| 106 | return error; |
| 107 | } |
| 108 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 109 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | xfs_readlink( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 111 | xfs_inode_t *ip, |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 112 | char *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 114 | xfs_mount_t *mp = ip->i_mount; |
Carlos Maiolino | b52a360 | 2011-11-07 16:10:24 +0000 | [diff] [blame] | 115 | xfs_fsize_t pathlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 118 | trace_xfs_readlink(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 121 | return XFS_ERROR(EIO); |
| 122 | |
| 123 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 124 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 125 | pathlen = ip->i_d.di_size; |
| 126 | if (!pathlen) |
| 127 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Carlos Maiolino | b52a360 | 2011-11-07 16:10:24 +0000 | [diff] [blame] | 129 | if (pathlen < 0 || pathlen > MAXPATHLEN) { |
| 130 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", |
| 131 | __func__, (unsigned long long) ip->i_ino, |
| 132 | (long long) pathlen); |
| 133 | ASSERT(0); |
Jan Kara | 9b025eb | 2012-01-11 18:52:10 +0000 | [diff] [blame] | 134 | error = XFS_ERROR(EFSCORRUPTED); |
| 135 | goto out; |
Carlos Maiolino | b52a360 | 2011-11-07 16:10:24 +0000 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | if (ip->i_df.if_flags & XFS_IFINLINE) { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 140 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
| 141 | link[pathlen] = '\0'; |
| 142 | } else { |
| 143 | error = xfs_readlink_bmap(ip, link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 146 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return error; |
| 149 | } |
| 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | /* |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 152 | * Flags for xfs_free_eofblocks |
| 153 | */ |
| 154 | #define XFS_FREE_EOF_TRYLOCK (1<<0) |
| 155 | |
| 156 | /* |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 157 | * This is called by xfs_inactive to free any blocks beyond eof |
| 158 | * when the link count isn't zero and by xfs_dm_punch_hole() when |
| 159 | * punching a hole to EOF. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 161 | STATIC int |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 162 | xfs_free_eofblocks( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | xfs_mount_t *mp, |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 164 | xfs_inode_t *ip, |
| 165 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
| 167 | xfs_trans_t *tp; |
| 168 | int error; |
| 169 | xfs_fileoff_t end_fsb; |
| 170 | xfs_fileoff_t last_fsb; |
| 171 | xfs_filblks_t map_len; |
| 172 | int nimaps; |
| 173 | xfs_bmbt_irec_t imap; |
| 174 | |
| 175 | /* |
| 176 | * Figure out if there are any blocks beyond the end |
| 177 | * of the file. If not, then there is nothing to do. |
| 178 | */ |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 179 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
Kulikov Vasiliy | 3f34885 | 2010-07-20 17:54:28 +1000 | [diff] [blame] | 181 | if (last_fsb <= end_fsb) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 182 | return 0; |
Kulikov Vasiliy | 3f34885 | 2010-07-20 17:54:28 +1000 | [diff] [blame] | 183 | map_len = last_fsb - end_fsb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | nimaps = 1; |
| 186 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 187 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 189 | |
| 190 | if (!error && (nimaps != 0) && |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 191 | (imap.br_startblock != HOLESTARTBLOCK || |
| 192 | ip->i_delayed_blks)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | /* |
| 194 | * Attach the dquots to the inode up front. |
| 195 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 196 | error = xfs_qm_dqattach(ip, 0); |
| 197 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 198 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | /* |
| 201 | * There are blocks after the end of file. |
| 202 | * Free them up now by truncating the file to |
| 203 | * its current size. |
| 204 | */ |
| 205 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 206 | |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 207 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
| 208 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { |
| 209 | xfs_trans_cancel(tp, 0); |
| 210 | return 0; |
| 211 | } |
| 212 | } else { |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 213 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | error = xfs_trans_reserve(tp, 0, |
| 217 | XFS_ITRUNCATE_LOG_RES(mp), |
| 218 | 0, XFS_TRANS_PERM_LOG_RES, |
| 219 | XFS_ITRUNCATE_LOG_COUNT); |
| 220 | if (error) { |
| 221 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 222 | xfs_trans_cancel(tp, 0); |
| 223 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 224 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 228 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 230 | /* |
| 231 | * Do not update the on-disk file size. If we update the |
| 232 | * on-disk file size and then the system crashes before the |
| 233 | * contents of the file are flushed to disk then the files |
| 234 | * may be full of holes (ie NULL files bug). |
| 235 | */ |
| 236 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 237 | XFS_ISIZE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | if (error) { |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 239 | /* |
| 240 | * If we get an error at this point we simply don't |
| 241 | * bother truncating the file. |
| 242 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | xfs_trans_cancel(tp, |
| 244 | (XFS_TRANS_RELEASE_LOG_RES | |
| 245 | XFS_TRANS_ABORT)); |
| 246 | } else { |
| 247 | error = xfs_trans_commit(tp, |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 248 | XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 250 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 252 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Free a symlink that has blocks associated with it. |
| 257 | */ |
| 258 | STATIC int |
| 259 | xfs_inactive_symlink_rmt( |
| 260 | xfs_inode_t *ip, |
| 261 | xfs_trans_t **tpp) |
| 262 | { |
| 263 | xfs_buf_t *bp; |
| 264 | int committed; |
| 265 | int done; |
| 266 | int error; |
| 267 | xfs_fsblock_t first_block; |
| 268 | xfs_bmap_free_t free_list; |
| 269 | int i; |
| 270 | xfs_mount_t *mp; |
| 271 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 272 | int nmaps; |
| 273 | xfs_trans_t *ntp; |
| 274 | int size; |
| 275 | xfs_trans_t *tp; |
| 276 | |
| 277 | tp = *tpp; |
| 278 | mp = ip->i_mount; |
| 279 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); |
| 280 | /* |
| 281 | * We're freeing a symlink that has some |
| 282 | * blocks allocated to it. Free the |
| 283 | * blocks here. We know that we've got |
| 284 | * either 1 or 2 extents and that we can |
| 285 | * free them all in one bunmapi call. |
| 286 | */ |
| 287 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); |
| 288 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 289 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 290 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 291 | xfs_trans_cancel(tp, 0); |
| 292 | *tpp = NULL; |
| 293 | return error; |
| 294 | } |
| 295 | /* |
| 296 | * Lock the inode, fix the size, and join it to the transaction. |
| 297 | * Hold it so in the normal path, we still have it locked for |
| 298 | * the second transaction. In the error paths we need it |
| 299 | * held so the cancel won't rele it, see below. |
| 300 | */ |
| 301 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 302 | size = (int)ip->i_d.di_size; |
| 303 | ip->i_d.di_size = 0; |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 304 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 306 | /* |
| 307 | * Find the block(s) so we can inval and unmap them. |
| 308 | */ |
| 309 | done = 0; |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 310 | xfs_bmap_init(&free_list, &first_block); |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 311 | nmaps = ARRAY_SIZE(mval); |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 312 | error = xfs_bmapi_read(ip, 0, XFS_B_TO_FSB(mp, size), |
| 313 | mval, &nmaps, 0); |
| 314 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | goto error0; |
| 316 | /* |
| 317 | * Invalidate the block(s). |
| 318 | */ |
| 319 | for (i = 0; i < nmaps; i++) { |
| 320 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
| 321 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), |
| 322 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); |
Chandra Seetharaman | 2a30f36d | 2011-09-20 13:56:55 +0000 | [diff] [blame] | 323 | if (!bp) { |
| 324 | error = ENOMEM; |
| 325 | goto error1; |
| 326 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | xfs_trans_binval(tp, bp); |
| 328 | } |
| 329 | /* |
| 330 | * Unmap the dead block(s) to the free_list. |
| 331 | */ |
| 332 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 333 | &first_block, &free_list, &done))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | goto error1; |
| 335 | ASSERT(done); |
| 336 | /* |
| 337 | * Commit the first transaction. This logs the EFI and the inode. |
| 338 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 339 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | goto error1; |
| 341 | /* |
| 342 | * The transaction must have been committed, since there were |
| 343 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. |
| 344 | * The new tp has the extent freeing and EFDs. |
| 345 | */ |
| 346 | ASSERT(committed); |
| 347 | /* |
| 348 | * The first xact was committed, so add the inode to the new one. |
| 349 | * Mark it dirty so it will be logged and moved forward in the log as |
| 350 | * part of every commit. |
| 351 | */ |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 352 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 354 | /* |
| 355 | * Get a new, empty transaction to return to our caller. |
| 356 | */ |
| 357 | ntp = xfs_trans_dup(tp); |
| 358 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 359 | * Commit the transaction containing extent freeing and EFDs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | * If we get an error on the commit here or on the reserve below, |
| 361 | * we need to unlock the inode since the new transaction doesn't |
| 362 | * have the inode attached. |
| 363 | */ |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 364 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | tp = ntp; |
| 366 | if (error) { |
| 367 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 368 | goto error0; |
| 369 | } |
| 370 | /* |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 371 | * transaction commit worked ok so we can drop the extra ticket |
| 372 | * reference that we gained in xfs_trans_dup() |
| 373 | */ |
| 374 | xfs_log_ticket_put(tp->t_ticket); |
| 375 | |
| 376 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | * Remove the memory for extent descriptions (just bookkeeping). |
| 378 | */ |
| 379 | if (ip->i_df.if_bytes) |
| 380 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); |
| 381 | ASSERT(ip->i_df.if_bytes == 0); |
| 382 | /* |
| 383 | * Put an itruncate log reservation in the new transaction |
| 384 | * for our caller. |
| 385 | */ |
| 386 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 387 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 388 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 389 | goto error0; |
| 390 | } |
| 391 | /* |
| 392 | * Return with the inode locked but not joined to the transaction. |
| 393 | */ |
| 394 | *tpp = tp; |
| 395 | return 0; |
| 396 | |
| 397 | error1: |
| 398 | xfs_bmap_cancel(&free_list); |
| 399 | error0: |
| 400 | /* |
| 401 | * Have to come here with the inode locked and either |
| 402 | * (held and in the transaction) or (not in the transaction). |
| 403 | * If the inode isn't held then cancel would iput it, but |
| 404 | * that's wrong since this is inactive and the vnode ref |
| 405 | * count is 0 already. |
| 406 | * Cancel won't do anything to the inode if held, but it still |
| 407 | * needs to be locked until the cancel is done, if it was |
| 408 | * joined to the transaction. |
| 409 | */ |
| 410 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 411 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 412 | *tpp = NULL; |
| 413 | return error; |
| 414 | |
| 415 | } |
| 416 | |
| 417 | STATIC int |
| 418 | xfs_inactive_symlink_local( |
| 419 | xfs_inode_t *ip, |
| 420 | xfs_trans_t **tpp) |
| 421 | { |
| 422 | int error; |
| 423 | |
| 424 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); |
| 425 | /* |
| 426 | * We're freeing a symlink which fit into |
| 427 | * the inode. Just free the memory used |
| 428 | * to hold the old symlink. |
| 429 | */ |
| 430 | error = xfs_trans_reserve(*tpp, 0, |
| 431 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), |
| 432 | 0, XFS_TRANS_PERM_LOG_RES, |
| 433 | XFS_ITRUNCATE_LOG_COUNT); |
| 434 | |
| 435 | if (error) { |
| 436 | xfs_trans_cancel(*tpp, 0); |
| 437 | *tpp = NULL; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 438 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 441 | |
| 442 | /* |
| 443 | * Zero length symlinks _can_ exist. |
| 444 | */ |
| 445 | if (ip->i_df.if_bytes > 0) { |
| 446 | xfs_idata_realloc(ip, |
| 447 | -(ip->i_df.if_bytes), |
| 448 | XFS_DATA_FORK); |
| 449 | ASSERT(ip->i_df.if_bytes == 0); |
| 450 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 451 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | STATIC int |
| 455 | xfs_inactive_attrs( |
| 456 | xfs_inode_t *ip, |
| 457 | xfs_trans_t **tpp) |
| 458 | { |
| 459 | xfs_trans_t *tp; |
| 460 | int error; |
| 461 | xfs_mount_t *mp; |
| 462 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 463 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | tp = *tpp; |
| 465 | mp = ip->i_mount; |
| 466 | ASSERT(ip->i_d.di_forkoff != 0); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 467 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 469 | if (error) |
| 470 | goto error_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
| 472 | error = xfs_attr_inactive(ip); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 473 | if (error) |
| 474 | goto error_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 477 | error = xfs_trans_reserve(tp, 0, |
| 478 | XFS_IFREE_LOG_RES(mp), |
| 479 | 0, XFS_TRANS_PERM_LOG_RES, |
| 480 | XFS_INACTIVE_LOG_COUNT); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 481 | if (error) |
| 482 | goto error_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
| 484 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 485 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 487 | |
| 488 | ASSERT(ip->i_d.di_anextents == 0); |
| 489 | |
| 490 | *tpp = tp; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 491 | return 0; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 492 | |
| 493 | error_cancel: |
| 494 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 495 | xfs_trans_cancel(tp, 0); |
| 496 | error_unlock: |
| 497 | *tpp = NULL; |
| 498 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 499 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | } |
| 501 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 502 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | xfs_release( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 504 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 506 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | int error; |
| 508 | |
Christoph Hellwig | 42173f6 | 2008-04-22 17:33:25 +1000 | [diff] [blame] | 509 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 513 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return 0; |
| 515 | |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 516 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 517 | int truncated; |
| 518 | |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 519 | /* |
| 520 | * If we are using filestreams, and we have an unlinked |
| 521 | * file that we are processing the last close on, then nothing |
| 522 | * will be able to reopen and write to this file. Purge this |
| 523 | * inode from the filestreams cache so that it doesn't delay |
| 524 | * teardown of the inode. |
| 525 | */ |
| 526 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) |
| 527 | xfs_filestream_deassociate(ip); |
| 528 | |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 529 | /* |
| 530 | * If we previously truncated this file and removed old data |
| 531 | * in the process, we want to initiate "early" writeout on |
| 532 | * the last close. This is an attempt to combat the notorious |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 533 | * NULL files problem which is particularly noticeable from a |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 534 | * truncate down, buffered (re-)write (delalloc), followed by |
| 535 | * a crash. What we are effectively doing here is |
| 536 | * significantly reducing the time window where we'd otherwise |
| 537 | * be exposed to that problem. |
| 538 | */ |
Christoph Hellwig | 09262b4 | 2007-08-29 11:44:50 +1000 | [diff] [blame] | 539 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
Dave Chinner | df4368a | 2011-06-23 01:35:00 +0000 | [diff] [blame] | 540 | if (truncated) { |
| 541 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); |
| 542 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) |
| 543 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); |
| 544 | } |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 545 | } |
| 546 | |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 547 | if (ip->i_d.di_nlink == 0) |
| 548 | return 0; |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 549 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 550 | if ((S_ISREG(ip->i_d.di_mode) && |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 551 | (VFS_I(ip)->i_size > 0 || |
| 552 | (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 553 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
| 554 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { |
| 555 | |
| 556 | /* |
| 557 | * If we can't get the iolock just skip truncating the blocks |
| 558 | * past EOF because we could deadlock with the mmap_sem |
| 559 | * otherwise. We'll get another chance to drop them once the |
| 560 | * last reference to the inode is dropped, so we'll never leak |
| 561 | * blocks permanently. |
| 562 | * |
| 563 | * Further, check if the inode is being opened, written and |
| 564 | * closed frequently and we have delayed allocation blocks |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 565 | * outstanding (e.g. streaming writes from the NFS server), |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 566 | * truncating the blocks past EOF will cause fragmentation to |
| 567 | * occur. |
| 568 | * |
| 569 | * In this case don't do the truncation, either, but we have to |
| 570 | * be careful how we detect this case. Blocks beyond EOF show |
| 571 | * up as i_delayed_blks even when the inode is clean, so we |
| 572 | * need to truncate them away first before checking for a dirty |
| 573 | * release. Hence on the first dirty close we will still remove |
| 574 | * the speculative allocation, but after that we will leave it |
| 575 | * in place. |
| 576 | */ |
| 577 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) |
| 578 | return 0; |
| 579 | |
| 580 | error = xfs_free_eofblocks(mp, ip, |
| 581 | XFS_FREE_EOF_TRYLOCK); |
| 582 | if (error) |
| 583 | return error; |
| 584 | |
| 585 | /* delalloc blocks after truncation means it really is dirty */ |
| 586 | if (ip->i_delayed_blks) |
| 587 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | /* |
| 593 | * xfs_inactive |
| 594 | * |
| 595 | * This is called when the vnode reference count for the vnode |
| 596 | * goes to zero. If the file has been unlinked, then it must |
| 597 | * now be truncated. Also, we clear all of the read-ahead state |
| 598 | * kept for the inode here since the file is now closed. |
| 599 | */ |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 600 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | xfs_inactive( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 602 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | { |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 604 | xfs_bmap_free_t free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | xfs_fsblock_t first_block; |
| 606 | int committed; |
| 607 | xfs_trans_t *tp; |
| 608 | xfs_mount_t *mp; |
| 609 | int error; |
| 610 | int truncate; |
| 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | /* |
| 613 | * If the inode is already free, then there can be nothing |
| 614 | * to clean up here. |
| 615 | */ |
Christoph Hellwig | cb4c8cc | 2009-03-16 08:25:25 +0100 | [diff] [blame] | 616 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | ASSERT(ip->i_df.if_real_bytes == 0); |
| 618 | ASSERT(ip->i_df.if_broot_bytes == 0); |
| 619 | return VN_INACTIVE_CACHE; |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * Only do a truncate if it's a regular file with |
| 624 | * some actual space in it. It's OK to look at the |
| 625 | * inode's fields without the lock because we're the |
| 626 | * only one with a reference to the inode. |
| 627 | */ |
| 628 | truncate = ((ip->i_d.di_nlink == 0) && |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 629 | ((ip->i_d.di_size != 0) || XFS_ISIZE(ip) != 0 || |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 630 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 631 | S_ISREG(ip->i_d.di_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
| 633 | mp = ip->i_mount; |
| 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | error = 0; |
| 636 | |
| 637 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 638 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | goto out; |
| 640 | |
| 641 | if (ip->i_d.di_nlink != 0) { |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 642 | if ((S_ISREG(ip->i_d.di_mode) && |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 643 | (VFS_I(ip)->i_size > 0 || |
| 644 | (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && |
| 645 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
| 646 | (!(ip->i_d.di_flags & |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 647 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 648 | ip->i_delayed_blks != 0))) { |
Christoph Hellwig | c56c963 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 649 | error = xfs_free_eofblocks(mp, ip, 0); |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 650 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 651 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | goto out; |
| 654 | } |
| 655 | |
| 656 | ASSERT(ip->i_d.di_nlink == 0); |
| 657 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 658 | error = xfs_qm_dqattach(ip, 0); |
| 659 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 660 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
| 662 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 663 | if (truncate) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | error = xfs_trans_reserve(tp, 0, |
| 667 | XFS_ITRUNCATE_LOG_RES(mp), |
| 668 | 0, XFS_TRANS_PERM_LOG_RES, |
| 669 | XFS_ITRUNCATE_LOG_COUNT); |
| 670 | if (error) { |
| 671 | /* Don't call itruncate_cleanup */ |
| 672 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 673 | xfs_trans_cancel(tp, 0); |
| 674 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 675 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 679 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 681 | ip->i_d.di_size = 0; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 682 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 683 | |
| 684 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | if (error) { |
| 686 | xfs_trans_cancel(tp, |
| 687 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 688 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 689 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 691 | |
| 692 | ASSERT(ip->i_d.di_nextents == 0); |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 693 | } else if (S_ISLNK(ip->i_d.di_mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | /* |
| 696 | * If we get an error while cleaning up a |
| 697 | * symlink we bail out. |
| 698 | */ |
| 699 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? |
| 700 | xfs_inactive_symlink_rmt(ip, &tp) : |
| 701 | xfs_inactive_symlink_local(ip, &tp); |
| 702 | |
| 703 | if (error) { |
| 704 | ASSERT(tp == NULL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 705 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | } |
| 707 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 708 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } else { |
| 710 | error = xfs_trans_reserve(tp, 0, |
| 711 | XFS_IFREE_LOG_RES(mp), |
| 712 | 0, XFS_TRANS_PERM_LOG_RES, |
| 713 | XFS_INACTIVE_LOG_COUNT); |
| 714 | if (error) { |
| 715 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 716 | xfs_trans_cancel(tp, 0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 717 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 721 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | /* |
| 725 | * If there are attributes associated with the file |
| 726 | * then blow them away now. The code calls a routine |
| 727 | * that recursively deconstructs the attribute fork. |
| 728 | * We need to just commit the current transaction |
| 729 | * because we can't use it for xfs_attr_inactive(). |
| 730 | */ |
| 731 | if (ip->i_d.di_anextents > 0) { |
| 732 | error = xfs_inactive_attrs(ip, &tp); |
| 733 | /* |
| 734 | * If we got an error, the transaction is already |
| 735 | * cancelled, and the inode is unlocked. Just get out. |
| 736 | */ |
| 737 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 738 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } else if (ip->i_afp) { |
| 740 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 741 | } |
| 742 | |
| 743 | /* |
| 744 | * Free the inode. |
| 745 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 746 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | error = xfs_ifree(tp, ip, &free_list); |
| 748 | if (error) { |
| 749 | /* |
| 750 | * If we fail to free the inode, shut down. The cancel |
| 751 | * might do that, we need to make sure. Otherwise the |
| 752 | * inode might be lost for a long time or forever. |
| 753 | */ |
| 754 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 755 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
| 756 | __func__, error); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 757 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 760 | } else { |
| 761 | /* |
| 762 | * Credit the quota account(s). The inode is gone. |
| 763 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 764 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | /* |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 767 | * Just ignore errors at this point. There is nothing we can |
| 768 | * do except to try to keep going. Make sure it's not a silent |
| 769 | * error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | */ |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 771 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
| 772 | if (error) |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 773 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
| 774 | __func__, error); |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 775 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
| 776 | if (error) |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 777 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
| 778 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | /* |
| 782 | * Release the dquots held by inode, if any. |
| 783 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 784 | xfs_qm_dqdetach(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 786 | |
| 787 | out: |
| 788 | return VN_INACTIVE_CACHE; |
| 789 | } |
| 790 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 791 | /* |
| 792 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match |
| 793 | * is allowed, otherwise it has to be an exact match. If a CI match is found, |
| 794 | * ci_name->name will point to a the actual name (caller must free) or |
| 795 | * will be set to NULL if an exact match is found. |
| 796 | */ |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 797 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | xfs_lookup( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 799 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 800 | struct xfs_name *name, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 801 | xfs_inode_t **ipp, |
| 802 | struct xfs_name *ci_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | { |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 804 | xfs_ino_t inum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | int error; |
| 806 | uint lock_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 808 | trace_xfs_lookup(dp, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
| 810 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 811 | return XFS_ERROR(EIO); |
| 812 | |
| 813 | lock_mode = xfs_ilock_map_shared(dp); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 814 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | xfs_iunlock_map_shared(dp, lock_mode); |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 816 | |
| 817 | if (error) |
| 818 | goto out; |
| 819 | |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 820 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 821 | if (error) |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 822 | goto out_free_name; |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 823 | |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 824 | return 0; |
| 825 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 826 | out_free_name: |
| 827 | if (ci_name) |
| 828 | kmem_free(ci_name->name); |
| 829 | out: |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 830 | *ipp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | return error; |
| 832 | } |
| 833 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 834 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | xfs_create( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 836 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 837 | struct xfs_name *name, |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 838 | umode_t mode, |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 839 | xfs_dev_t rdev, |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 840 | xfs_inode_t **ipp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | { |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 842 | int is_dir = S_ISDIR(mode); |
| 843 | struct xfs_mount *mp = dp->i_mount; |
| 844 | struct xfs_inode *ip = NULL; |
| 845 | struct xfs_trans *tp = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 846 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | xfs_bmap_free_t free_list; |
| 848 | xfs_fsblock_t first_block; |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 849 | boolean_t unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | uint cancel_flags; |
| 851 | int committed; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 852 | prid_t prid; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 853 | struct xfs_dquot *udqp = NULL; |
| 854 | struct xfs_dquot *gdqp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | uint resblks; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 856 | uint log_res; |
| 857 | uint log_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 859 | trace_xfs_create(dp, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 861 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 862 | return XFS_ERROR(EIO); |
| 863 | |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 864 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 865 | prid = xfs_get_projid(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | else |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 867 | prid = XFS_PROJID_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
| 869 | /* |
| 870 | * Make sure that we have allocated dquot(s) on disk. |
| 871 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 872 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 873 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 875 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 877 | if (is_dir) { |
| 878 | rdev = 0; |
| 879 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); |
| 880 | log_res = XFS_MKDIR_LOG_RES(mp); |
| 881 | log_count = XFS_MKDIR_LOG_COUNT; |
| 882 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); |
| 883 | } else { |
| 884 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); |
| 885 | log_res = XFS_CREATE_LOG_RES(mp); |
| 886 | log_count = XFS_CREATE_LOG_COUNT; |
| 887 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); |
| 888 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | /* |
| 893 | * Initially assume that the file does not exist and |
| 894 | * reserve the resources for that case. If that is not |
| 895 | * the case we'll drop the one we have and get a more |
| 896 | * appropriate transaction later. |
| 897 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 898 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
| 899 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | if (error == ENOSPC) { |
Dave Chinner | 153fec4 | 2009-04-06 18:48:30 +0200 | [diff] [blame] | 901 | /* flush outstanding delalloc blocks and retry */ |
| 902 | xfs_flush_inodes(dp); |
Christoph Hellwig | 4734d40 | 2009-09-09 18:19:02 -0500 | [diff] [blame] | 903 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
| 904 | XFS_TRANS_PERM_LOG_RES, log_count); |
Dave Chinner | 153fec4 | 2009-04-06 18:48:30 +0200 | [diff] [blame] | 905 | } |
| 906 | if (error == ENOSPC) { |
| 907 | /* No space at all so try a "no-allocation" reservation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | resblks = 0; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 909 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
| 910 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | } |
| 912 | if (error) { |
| 913 | cancel_flags = 0; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 914 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 917 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 918 | unlock_dp_on_error = B_TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 920 | /* |
| 921 | * Check for directory link count overflow. |
| 922 | */ |
| 923 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { |
| 924 | error = XFS_ERROR(EMLINK); |
| 925 | goto out_trans_cancel; |
| 926 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 928 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | /* |
| 931 | * Reserve disk quota and the inode. |
| 932 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 933 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | if (error) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 935 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 937 | error = xfs_dir_canenter(tp, dp, name, resblks); |
| 938 | if (error) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 939 | goto out_trans_cancel; |
| 940 | |
| 941 | /* |
| 942 | * A newly created regular or special file just has one directory |
| 943 | * entry pointing to them, but a directory also the "." entry |
| 944 | * pointing to itself. |
| 945 | */ |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 946 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 947 | prid, resblks > 0, &ip, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (error) { |
| 949 | if (error == ENOSPC) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 950 | goto out_trans_cancel; |
| 951 | goto out_trans_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
| 954 | /* |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 955 | * Now we join the directory inode to the transaction. We do not do it |
| 956 | * earlier because xfs_dir_ialloc might commit the previous transaction |
| 957 | * (and release all the locks). An error from here on will result in |
| 958 | * the transaction cancel unlocking dp so don't do it explicitly in the |
| 959 | * error path. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | */ |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 961 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 962 | unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 964 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 965 | &first_block, &free_list, resblks ? |
| 966 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | if (error) { |
| 968 | ASSERT(error != ENOSPC); |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 969 | goto out_trans_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 971 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 973 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 974 | if (is_dir) { |
| 975 | error = xfs_dir_init(tp, ip, dp); |
| 976 | if (error) |
| 977 | goto out_bmap_cancel; |
| 978 | |
| 979 | error = xfs_bumplink(tp, dp); |
| 980 | if (error) |
| 981 | goto out_bmap_cancel; |
| 982 | } |
| 983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | /* |
| 985 | * If this is a synchronous mount, make sure that the |
| 986 | * create transaction goes to disk before returning to |
| 987 | * the user. |
| 988 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 989 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | /* |
| 993 | * Attach the dquot(s) to the inodes and modify them incore. |
| 994 | * These ids of the inode couldn't have changed since the new |
| 995 | * inode has been locked ever since it was created. |
| 996 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 997 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 999 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 1000 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1001 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1003 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1004 | if (error) |
| 1005 | goto out_release_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1007 | xfs_qm_dqrele(udqp); |
| 1008 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 1010 | *ipp = ip; |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1011 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 1013 | out_bmap_cancel: |
| 1014 | xfs_bmap_cancel(&free_list); |
| 1015 | out_trans_abort: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | cancel_flags |= XFS_TRANS_ABORT; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 1017 | out_trans_cancel: |
| 1018 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1019 | out_release_inode: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | /* |
| 1021 | * Wait until after the current transaction is aborted to |
| 1022 | * release the inode. This prevents recursive transactions |
| 1023 | * and deadlocks from xfs_inactive. |
| 1024 | */ |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1025 | if (ip) |
| 1026 | IRELE(ip); |
| 1027 | |
| 1028 | xfs_qm_dqrele(udqp); |
| 1029 | xfs_qm_dqrele(gdqp); |
| 1030 | |
| 1031 | if (unlock_dp_on_error) |
| 1032 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 1033 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | #ifdef DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | int xfs_locked_n; |
| 1038 | int xfs_small_retries; |
| 1039 | int xfs_middle_retries; |
| 1040 | int xfs_lots_retries; |
| 1041 | int xfs_lock_delays; |
| 1042 | #endif |
| 1043 | |
| 1044 | /* |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1045 | * Bump the subclass so xfs_lock_inodes() acquires each lock with |
| 1046 | * a different value |
| 1047 | */ |
| 1048 | static inline int |
| 1049 | xfs_lock_inumorder(int lock_mode, int subclass) |
| 1050 | { |
| 1051 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 1052 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1053 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 1054 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1055 | |
| 1056 | return lock_mode; |
| 1057 | } |
| 1058 | |
| 1059 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | * The following routine will lock n inodes in exclusive mode. |
| 1061 | * We assume the caller calls us with the inodes in i_ino order. |
| 1062 | * |
| 1063 | * We need to detect deadlock where an inode that we lock |
| 1064 | * is in the AIL and we start waiting for another inode that is locked |
| 1065 | * by a thread in a long running transaction (such as truncate). This can |
| 1066 | * result in deadlock since the long running trans might need to wait |
| 1067 | * for the inode we just locked in order to push the tail and free space |
| 1068 | * in the log. |
| 1069 | */ |
| 1070 | void |
| 1071 | xfs_lock_inodes( |
| 1072 | xfs_inode_t **ips, |
| 1073 | int inodes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | uint lock_mode) |
| 1075 | { |
| 1076 | int attempts = 0, i, j, try_lock; |
| 1077 | xfs_log_item_t *lp; |
| 1078 | |
| 1079 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ |
| 1080 | |
Christoph Hellwig | cfa853e | 2008-04-22 17:34:06 +1000 | [diff] [blame] | 1081 | try_lock = 0; |
| 1082 | i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
| 1084 | again: |
| 1085 | for (; i < inodes; i++) { |
| 1086 | ASSERT(ips[i]); |
| 1087 | |
| 1088 | if (i && (ips[i] == ips[i-1])) /* Already locked */ |
| 1089 | continue; |
| 1090 | |
| 1091 | /* |
| 1092 | * If try_lock is not set yet, make sure all locked inodes |
| 1093 | * are not in the AIL. |
| 1094 | * If any are, set try_lock to be used later. |
| 1095 | */ |
| 1096 | |
| 1097 | if (!try_lock) { |
| 1098 | for (j = (i - 1); j >= 0 && !try_lock; j--) { |
| 1099 | lp = (xfs_log_item_t *)ips[j]->i_itemp; |
| 1100 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 1101 | try_lock++; |
| 1102 | } |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | /* |
| 1107 | * If any of the previous locks we have locked is in the AIL, |
| 1108 | * we must TRY to get the second and subsequent locks. If |
| 1109 | * we can't get any, we must release all we have |
| 1110 | * and try again. |
| 1111 | */ |
| 1112 | |
| 1113 | if (try_lock) { |
| 1114 | /* try_lock must be 0 if i is 0. */ |
| 1115 | /* |
| 1116 | * try_lock means we have an inode locked |
| 1117 | * that is in the AIL. |
| 1118 | */ |
| 1119 | ASSERT(i != 0); |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1120 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | attempts++; |
| 1122 | |
| 1123 | /* |
| 1124 | * Unlock all previous guys and try again. |
| 1125 | * xfs_iunlock will try to push the tail |
| 1126 | * if the inode is in the AIL. |
| 1127 | */ |
| 1128 | |
| 1129 | for(j = i - 1; j >= 0; j--) { |
| 1130 | |
| 1131 | /* |
| 1132 | * Check to see if we've already |
| 1133 | * unlocked this one. |
| 1134 | * Not the first one going back, |
| 1135 | * and the inode ptr is the same. |
| 1136 | */ |
| 1137 | if ((j != (i - 1)) && ips[j] == |
| 1138 | ips[j+1]) |
| 1139 | continue; |
| 1140 | |
| 1141 | xfs_iunlock(ips[j], lock_mode); |
| 1142 | } |
| 1143 | |
| 1144 | if ((attempts % 5) == 0) { |
| 1145 | delay(1); /* Don't just spin the CPU */ |
| 1146 | #ifdef DEBUG |
| 1147 | xfs_lock_delays++; |
| 1148 | #endif |
| 1149 | } |
| 1150 | i = 0; |
| 1151 | try_lock = 0; |
| 1152 | goto again; |
| 1153 | } |
| 1154 | } else { |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1155 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | #ifdef DEBUG |
| 1160 | if (attempts) { |
| 1161 | if (attempts < 5) xfs_small_retries++; |
| 1162 | else if (attempts < 100) xfs_middle_retries++; |
| 1163 | else xfs_lots_retries++; |
| 1164 | } else { |
| 1165 | xfs_locked_n++; |
| 1166 | } |
| 1167 | #endif |
| 1168 | } |
| 1169 | |
David Chinner | f9114eb | 2008-09-17 16:51:21 +1000 | [diff] [blame] | 1170 | /* |
| 1171 | * xfs_lock_two_inodes() can only be used to lock one type of lock |
| 1172 | * at a time - the iolock or the ilock, but not both at once. If |
| 1173 | * we lock both at once, lockdep will report false positives saying |
| 1174 | * we have violated locking orders. |
| 1175 | */ |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1176 | void |
| 1177 | xfs_lock_two_inodes( |
| 1178 | xfs_inode_t *ip0, |
| 1179 | xfs_inode_t *ip1, |
| 1180 | uint lock_mode) |
| 1181 | { |
| 1182 | xfs_inode_t *temp; |
| 1183 | int attempts = 0; |
| 1184 | xfs_log_item_t *lp; |
| 1185 | |
David Chinner | f9114eb | 2008-09-17 16:51:21 +1000 | [diff] [blame] | 1186 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
| 1187 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1188 | ASSERT(ip0->i_ino != ip1->i_ino); |
| 1189 | |
| 1190 | if (ip0->i_ino > ip1->i_ino) { |
| 1191 | temp = ip0; |
| 1192 | ip0 = ip1; |
| 1193 | ip1 = temp; |
| 1194 | } |
| 1195 | |
| 1196 | again: |
| 1197 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); |
| 1198 | |
| 1199 | /* |
| 1200 | * If the first lock we have locked is in the AIL, we must TRY to get |
| 1201 | * the second lock. If we can't get it, we must release the first one |
| 1202 | * and try again. |
| 1203 | */ |
| 1204 | lp = (xfs_log_item_t *)ip0->i_itemp; |
| 1205 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 1206 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { |
| 1207 | xfs_iunlock(ip0, lock_mode); |
| 1208 | if ((++attempts % 5) == 0) |
| 1209 | delay(1); /* Don't just spin the CPU */ |
| 1210 | goto again; |
| 1211 | } |
| 1212 | } else { |
| 1213 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); |
| 1214 | } |
| 1215 | } |
| 1216 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1217 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | xfs_remove( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1219 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1220 | struct xfs_name *name, |
| 1221 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1223 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | xfs_trans_t *tp = NULL; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1225 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | int error = 0; |
| 1227 | xfs_bmap_free_t free_list; |
| 1228 | xfs_fsblock_t first_block; |
| 1229 | int cancel_flags; |
| 1230 | int committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | int link_zero; |
| 1232 | uint resblks; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1233 | uint log_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1235 | trace_xfs_remove(dp, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1238 | return XFS_ERROR(EIO); |
| 1239 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1240 | error = xfs_qm_dqattach(dp, 0); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1241 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | goto std_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1244 | error = xfs_qm_dqattach(ip, 0); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1245 | if (error) |
| 1246 | goto std_return; |
| 1247 | |
| 1248 | if (is_dir) { |
| 1249 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); |
| 1250 | log_count = XFS_DEFAULT_LOG_COUNT; |
| 1251 | } else { |
| 1252 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); |
| 1253 | log_count = XFS_REMOVE_LOG_COUNT; |
| 1254 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | /* |
| 1258 | * We try to get the real space reservation first, |
| 1259 | * allowing for directory btree deletion(s) implying |
| 1260 | * possible bmap insert(s). If we can't get the space |
| 1261 | * reservation then we use 0 instead, and avoid the bmap |
| 1262 | * btree insert(s) in the directory code by, if the bmap |
| 1263 | * insert tries to happen, instead trimming the LAST |
| 1264 | * block from the directory. |
| 1265 | */ |
| 1266 | resblks = XFS_REMOVE_SPACE_RES(mp); |
| 1267 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1268 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | if (error == ENOSPC) { |
| 1270 | resblks = 0; |
| 1271 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1272 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | } |
| 1274 | if (error) { |
| 1275 | ASSERT(error != ENOSPC); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1276 | cancel_flags = 0; |
| 1277 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | } |
| 1279 | |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1280 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1282 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 1283 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | /* |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1286 | * If we're removing a directory perform some additional validation. |
| 1287 | */ |
| 1288 | if (is_dir) { |
| 1289 | ASSERT(ip->i_d.di_nlink >= 2); |
| 1290 | if (ip->i_d.di_nlink != 2) { |
| 1291 | error = XFS_ERROR(ENOTEMPTY); |
| 1292 | goto out_trans_cancel; |
| 1293 | } |
| 1294 | if (!xfs_dir_isempty(ip)) { |
| 1295 | error = XFS_ERROR(ENOTEMPTY); |
| 1296 | goto out_trans_cancel; |
| 1297 | } |
| 1298 | } |
| 1299 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1300 | xfs_bmap_init(&free_list, &first_block); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1301 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
Christoph Hellwig | d4377d8 | 2008-04-22 17:33:46 +1000 | [diff] [blame] | 1302 | &first_block, &free_list, resblks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | if (error) { |
| 1304 | ASSERT(error != ENOENT); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1305 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | } |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1307 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1309 | if (is_dir) { |
| 1310 | /* |
| 1311 | * Drop the link from ip's "..". |
| 1312 | */ |
| 1313 | error = xfs_droplink(tp, dp); |
| 1314 | if (error) |
| 1315 | goto out_bmap_cancel; |
| 1316 | |
| 1317 | /* |
Christoph Hellwig | 2b7035f | 2008-10-30 17:55:18 +1100 | [diff] [blame] | 1318 | * Drop the "." link from ip to self. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1319 | */ |
| 1320 | error = xfs_droplink(tp, ip); |
| 1321 | if (error) |
| 1322 | goto out_bmap_cancel; |
| 1323 | } else { |
| 1324 | /* |
| 1325 | * When removing a non-directory we need to log the parent |
Dave Chinner | 26c5295 | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1326 | * inode here. For a directory this is done implicitly |
| 1327 | * by the xfs_droplink call for the ".." entry. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1328 | */ |
| 1329 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | } |
| 1331 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1332 | /* |
Christoph Hellwig | 2b7035f | 2008-10-30 17:55:18 +1100 | [diff] [blame] | 1333 | * Drop the link from dp to ip. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1334 | */ |
| 1335 | error = xfs_droplink(tp, ip); |
| 1336 | if (error) |
| 1337 | goto out_bmap_cancel; |
| 1338 | |
| 1339 | /* |
| 1340 | * Determine if this is the last link while |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | * we are in the transaction. |
| 1342 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1343 | link_zero = (ip->i_d.di_nlink == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
| 1345 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | * If this is a synchronous mount, make sure that the |
| 1347 | * remove transaction goes to disk before returning to |
| 1348 | * the user. |
| 1349 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1350 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1353 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1354 | if (error) |
| 1355 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1357 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | 5df78e7 | 2008-04-22 17:34:24 +1000 | [diff] [blame] | 1358 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | goto std_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
| 1361 | /* |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1362 | * If we are using filestreams, kill the stream association. |
| 1363 | * If the file is still open it may get a new one but that |
| 1364 | * will get killed on last close in xfs_close() so we don't |
| 1365 | * have to worry about that. |
| 1366 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1367 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1368 | xfs_filestream_deassociate(ip); |
| 1369 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1370 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1372 | out_bmap_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | xfs_bmap_cancel(&free_list); |
| 1374 | cancel_flags |= XFS_TRANS_ABORT; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1375 | out_trans_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1377 | std_return: |
| 1378 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | } |
| 1380 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1381 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | xfs_link( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1383 | xfs_inode_t *tdp, |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 1384 | xfs_inode_t *sip, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1385 | struct xfs_name *target_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1387 | xfs_mount_t *mp = tdp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | int error; |
| 1390 | xfs_bmap_free_t free_list; |
| 1391 | xfs_fsblock_t first_block; |
| 1392 | int cancel_flags; |
| 1393 | int committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | int resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1396 | trace_xfs_link(tdp, target_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 1398 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1401 | return XFS_ERROR(EIO); |
| 1402 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1403 | error = xfs_qm_dqattach(sip, 0); |
Christoph Hellwig | cb3f35b | 2009-02-04 09:34:20 +0100 | [diff] [blame] | 1404 | if (error) |
| 1405 | goto std_return; |
| 1406 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1407 | error = xfs_qm_dqattach(tdp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | if (error) |
| 1409 | goto std_return; |
| 1410 | |
| 1411 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); |
| 1412 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1413 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
| 1415 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 1416 | if (error == ENOSPC) { |
| 1417 | resblks = 0; |
| 1418 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, |
| 1419 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 1420 | } |
| 1421 | if (error) { |
| 1422 | cancel_flags = 0; |
| 1423 | goto error_return; |
| 1424 | } |
| 1425 | |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1426 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1428 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
| 1429 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | |
| 1431 | /* |
| 1432 | * If the source has too many links, we can't make any more to it. |
| 1433 | */ |
| 1434 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { |
| 1435 | error = XFS_ERROR(EMLINK); |
| 1436 | goto error_return; |
| 1437 | } |
| 1438 | |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1439 | /* |
| 1440 | * If we are using project inheritance, we only allow hard link |
| 1441 | * creation in our tree when the project IDs are the same; else |
| 1442 | * the tree quota mechanism could be circumvented. |
| 1443 | */ |
| 1444 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1445 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
Nathan Scott | b1ecdda | 2006-05-08 19:51:42 +1000 | [diff] [blame] | 1446 | error = XFS_ERROR(EXDEV); |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1447 | goto error_return; |
| 1448 | } |
| 1449 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1450 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
| 1451 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | goto error_return; |
| 1453 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1454 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1456 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
| 1457 | &first_block, &free_list, resblks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | if (error) |
| 1459 | goto abort_return; |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1460 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
| 1462 | |
| 1463 | error = xfs_bumplink(tp, sip); |
Alexey Dobriyan | b71d300 | 2006-06-27 12:45:17 +1000 | [diff] [blame] | 1464 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | goto abort_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
| 1467 | /* |
| 1468 | * If this is a synchronous mount, make sure that the |
| 1469 | * link transaction goes to disk before returning to |
| 1470 | * the user. |
| 1471 | */ |
| 1472 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 1473 | xfs_trans_set_sync(tp); |
| 1474 | } |
| 1475 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1476 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | if (error) { |
| 1478 | xfs_bmap_cancel(&free_list); |
| 1479 | goto abort_return; |
| 1480 | } |
| 1481 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1482 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | |
| 1484 | abort_return: |
| 1485 | cancel_flags |= XFS_TRANS_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | error_return: |
| 1487 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1488 | std_return: |
| 1489 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | } |
Alexey Dobriyan | b71d300 | 2006-06-27 12:45:17 +1000 | [diff] [blame] | 1491 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1492 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | xfs_symlink( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1494 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1495 | struct xfs_name *link_name, |
| 1496 | const char *target_path, |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 1497 | umode_t mode, |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 1498 | xfs_inode_t **ipp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1500 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | xfs_inode_t *ip; |
| 1503 | int error; |
| 1504 | int pathlen; |
| 1505 | xfs_bmap_free_t free_list; |
| 1506 | xfs_fsblock_t first_block; |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1507 | boolean_t unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | uint cancel_flags; |
| 1509 | int committed; |
| 1510 | xfs_fileoff_t first_fsb; |
| 1511 | xfs_filblks_t fs_blocks; |
| 1512 | int nmaps; |
| 1513 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 1514 | xfs_daddr_t d; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1515 | const char *cur_chunk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | int byte_cnt; |
| 1517 | int n; |
| 1518 | xfs_buf_t *bp; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1519 | prid_t prid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | struct xfs_dquot *udqp, *gdqp; |
| 1521 | uint resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 1523 | *ipp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | error = 0; |
| 1525 | ip = NULL; |
| 1526 | tp = NULL; |
| 1527 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1528 | trace_xfs_symlink(dp, link_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
| 1530 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1531 | return XFS_ERROR(EIO); |
| 1532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | /* |
| 1534 | * Check component lengths of the target path name. |
| 1535 | */ |
| 1536 | pathlen = strlen(target_path); |
| 1537 | if (pathlen >= MAXPATHLEN) /* total string too long */ |
| 1538 | return XFS_ERROR(ENAMETOOLONG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | udqp = gdqp = NULL; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1541 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1542 | prid = xfs_get_projid(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | else |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1544 | prid = XFS_PROJID_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | |
| 1546 | /* |
| 1547 | * Make sure that we have allocated dquot(s) on disk. |
| 1548 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1549 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| 1551 | if (error) |
| 1552 | goto std_return; |
| 1553 | |
| 1554 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); |
| 1555 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 1556 | /* |
| 1557 | * The symlink will fit into the inode data fork? |
| 1558 | * There can't be any attributes so we get the whole variable part. |
| 1559 | */ |
| 1560 | if (pathlen <= XFS_LITINO(mp)) |
| 1561 | fs_blocks = 0; |
| 1562 | else |
| 1563 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1564 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
| 1566 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 1567 | if (error == ENOSPC && fs_blocks == 0) { |
| 1568 | resblks = 0; |
| 1569 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, |
| 1570 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 1571 | } |
| 1572 | if (error) { |
| 1573 | cancel_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | goto error_return; |
| 1575 | } |
| 1576 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1577 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1578 | unlock_dp_on_error = B_TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
| 1580 | /* |
| 1581 | * Check whether the directory allows new symlinks or not. |
| 1582 | */ |
| 1583 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { |
| 1584 | error = XFS_ERROR(EPERM); |
| 1585 | goto error_return; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * Reserve disk quota : blocks and inode. |
| 1590 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1591 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | if (error) |
| 1593 | goto error_return; |
| 1594 | |
| 1595 | /* |
| 1596 | * Check for ability to enter directory entry, if no space reserved. |
| 1597 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1598 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
| 1599 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | goto error_return; |
| 1601 | /* |
| 1602 | * Initialize the bmap freelist prior to calling either |
| 1603 | * bmapi or the directory create code. |
| 1604 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1605 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
| 1607 | /* |
| 1608 | * Allocate an inode for the symlink. |
| 1609 | */ |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 1610 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
| 1611 | prid, resblks > 0, &ip, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | if (error) { |
| 1613 | if (error == ENOSPC) |
| 1614 | goto error_return; |
| 1615 | goto error1; |
| 1616 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1618 | /* |
| 1619 | * An error after we've joined dp to the transaction will result in the |
| 1620 | * transaction cancel unlocking dp so don't do it explicitly in the |
| 1621 | * error path. |
| 1622 | */ |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1623 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1624 | unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
| 1626 | /* |
| 1627 | * Also attach the dquot(s) to it, if applicable. |
| 1628 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1629 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
| 1631 | if (resblks) |
| 1632 | resblks -= XFS_IALLOC_SPACE_RES(mp); |
| 1633 | /* |
| 1634 | * If the symlink will fit into the inode, write it inline. |
| 1635 | */ |
| 1636 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { |
| 1637 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); |
| 1638 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); |
| 1639 | ip->i_d.di_size = pathlen; |
| 1640 | |
| 1641 | /* |
| 1642 | * The inode was initially created in extent format. |
| 1643 | */ |
| 1644 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); |
| 1645 | ip->i_df.if_flags |= XFS_IFINLINE; |
| 1646 | |
| 1647 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
| 1648 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
| 1649 | |
| 1650 | } else { |
| 1651 | first_fsb = 0; |
| 1652 | nmaps = SYMLINK_MAPS; |
| 1653 | |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 1654 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, |
| 1655 | XFS_BMAPI_METADATA, &first_block, resblks, |
| 1656 | mval, &nmaps, &free_list); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1657 | if (error) |
| 1658 | goto error2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | |
| 1660 | if (resblks) |
| 1661 | resblks -= fs_blocks; |
| 1662 | ip->i_d.di_size = pathlen; |
| 1663 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1664 | |
| 1665 | cur_chunk = target_path; |
| 1666 | for (n = 0; n < nmaps; n++) { |
| 1667 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| 1668 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| 1669 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
| 1670 | BTOBB(byte_cnt), 0); |
Chandra Seetharaman | 2a30f36d | 2011-09-20 13:56:55 +0000 | [diff] [blame] | 1671 | if (!bp) { |
| 1672 | error = ENOMEM; |
| 1673 | goto error2; |
| 1674 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | if (pathlen < byte_cnt) { |
| 1676 | byte_cnt = pathlen; |
| 1677 | } |
| 1678 | pathlen -= byte_cnt; |
| 1679 | |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 1680 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | cur_chunk += byte_cnt; |
| 1682 | |
| 1683 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | /* |
| 1688 | * Create the directory entry for the symlink. |
| 1689 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1690 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
| 1691 | &first_block, &free_list, resblks); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1692 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1693 | goto error2; |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1694 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 1696 | |
| 1697 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | * If this is a synchronous mount, make sure that the |
| 1699 | * symlink transaction goes to disk before returning to |
| 1700 | * the user. |
| 1701 | */ |
| 1702 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 1703 | xfs_trans_set_sync(tp); |
| 1704 | } |
| 1705 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1706 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (error) { |
| 1708 | goto error2; |
| 1709 | } |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1710 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1711 | xfs_qm_dqrele(udqp); |
| 1712 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1714 | *ipp = ip; |
| 1715 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | |
| 1717 | error2: |
| 1718 | IRELE(ip); |
| 1719 | error1: |
| 1720 | xfs_bmap_cancel(&free_list); |
| 1721 | cancel_flags |= XFS_TRANS_ABORT; |
| 1722 | error_return: |
| 1723 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1724 | xfs_qm_dqrele(udqp); |
| 1725 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1727 | if (unlock_dp_on_error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1729 | std_return: |
| 1730 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | } |
| 1732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1734 | xfs_set_dmattrs( |
| 1735 | xfs_inode_t *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | u_int evmask, |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1737 | u_int16_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1739 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | int error; |
| 1742 | |
| 1743 | if (!capable(CAP_SYS_ADMIN)) |
| 1744 | return XFS_ERROR(EPERM); |
| 1745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1747 | return XFS_ERROR(EIO); |
| 1748 | |
| 1749 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); |
| 1750 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); |
| 1751 | if (error) { |
| 1752 | xfs_trans_cancel(tp, 0); |
| 1753 | return error; |
| 1754 | } |
| 1755 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1756 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | |
Christoph Hellwig | 613d704 | 2007-10-11 17:44:08 +1000 | [diff] [blame] | 1758 | ip->i_d.di_dmevmask = evmask; |
| 1759 | ip->i_d.di_dmstate = state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | |
| 1761 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1762 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | |
| 1764 | return error; |
| 1765 | } |
| 1766 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | /* |
| 1768 | * xfs_alloc_file_space() |
| 1769 | * This routine allocates disk space for the given file. |
| 1770 | * |
| 1771 | * If alloc_type == 0, this request is for an ALLOCSP type |
| 1772 | * request which will change the file size. In this case, no |
| 1773 | * DMAPI event will be generated by the call. A TRUNCATE event |
| 1774 | * will be generated later by xfs_setattr. |
| 1775 | * |
| 1776 | * If alloc_type != 0, this request is for a RESVSP type |
| 1777 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the |
| 1778 | * lower block boundary byte address is less than the file's |
| 1779 | * length. |
| 1780 | * |
| 1781 | * RETURNS: |
| 1782 | * 0 on success |
| 1783 | * errno on error |
| 1784 | * |
| 1785 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1786 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | xfs_alloc_file_space( |
| 1788 | xfs_inode_t *ip, |
| 1789 | xfs_off_t offset, |
| 1790 | xfs_off_t len, |
| 1791 | int alloc_type, |
| 1792 | int attr_flags) |
| 1793 | { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1794 | xfs_mount_t *mp = ip->i_mount; |
| 1795 | xfs_off_t count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | xfs_filblks_t allocated_fsb; |
| 1797 | xfs_filblks_t allocatesize_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1798 | xfs_extlen_t extsz, temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | xfs_fileoff_t startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1800 | xfs_fsblock_t firstfsb; |
| 1801 | int nimaps; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1802 | int quota_flag; |
| 1803 | int rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | xfs_trans_t *tp; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1805 | xfs_bmbt_irec_t imaps[1], *imapp; |
| 1806 | xfs_bmap_free_t free_list; |
| 1807 | uint qblocks, resblks, resrtextents; |
| 1808 | int committed; |
| 1809 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1811 | trace_xfs_alloc_file_space(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | |
| 1813 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1814 | return XFS_ERROR(EIO); |
| 1815 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1816 | error = xfs_qm_dqattach(ip, 0); |
| 1817 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | return error; |
| 1819 | |
| 1820 | if (len <= 0) |
| 1821 | return XFS_ERROR(EINVAL); |
| 1822 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 1823 | rt = XFS_IS_REALTIME_INODE(ip); |
| 1824 | extsz = xfs_get_extsz_hint(ip); |
| 1825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | count = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | imapp = &imaps[0]; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1828 | nimaps = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1830 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); |
| 1831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1833 | * Allocate file space until done or until there is an error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | while (allocatesize_fsb && !error) { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1836 | xfs_fileoff_t s, e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1838 | /* |
Nathan Scott | 3ddb8fa | 2006-01-11 15:33:02 +1100 | [diff] [blame] | 1839 | * Determine space reservations for data/realtime. |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1840 | */ |
| 1841 | if (unlikely(extsz)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | s = startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1843 | do_div(s, extsz); |
| 1844 | s *= extsz; |
| 1845 | e = startoffset_fsb + allocatesize_fsb; |
| 1846 | if ((temp = do_mod(startoffset_fsb, extsz))) |
| 1847 | e += temp; |
| 1848 | if ((temp = do_mod(e, extsz))) |
| 1849 | e += extsz - temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | } else { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1851 | s = 0; |
| 1852 | e = allocatesize_fsb; |
| 1853 | } |
| 1854 | |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1855 | /* |
| 1856 | * The transaction reservation is limited to a 32-bit block |
| 1857 | * count, hence we need to limit the number of blocks we are |
| 1858 | * trying to reserve to avoid an overflow. We can't allocate |
| 1859 | * more than @nimaps extents, and an extent is limited on disk |
| 1860 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. |
| 1861 | */ |
| 1862 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1863 | if (unlikely(rt)) { |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1864 | resrtextents = qblocks = resblks; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1865 | resrtextents /= mp->m_sb.sb_rextsize; |
| 1866 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 1867 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 1868 | } else { |
| 1869 | resrtextents = 0; |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1870 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1871 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | } |
| 1873 | |
| 1874 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1875 | * Allocate and setup the transaction. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | */ |
| 1877 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1878 | error = xfs_trans_reserve(tp, resblks, |
| 1879 | XFS_WRITE_LOG_RES(mp), resrtextents, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | XFS_TRANS_PERM_LOG_RES, |
| 1881 | XFS_WRITE_LOG_COUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1883 | * Check for running out of space |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | */ |
| 1885 | if (error) { |
| 1886 | /* |
| 1887 | * Free the transaction structure. |
| 1888 | */ |
| 1889 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 1890 | xfs_trans_cancel(tp, 0); |
| 1891 | break; |
| 1892 | } |
| 1893 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1894 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
| 1895 | 0, quota_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | if (error) |
| 1897 | goto error1; |
| 1898 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1899 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1901 | xfs_bmap_init(&free_list, &firstfsb); |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 1902 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
| 1903 | allocatesize_fsb, alloc_type, &firstfsb, |
| 1904 | 0, imapp, &nimaps, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | if (error) { |
| 1906 | goto error0; |
| 1907 | } |
| 1908 | |
| 1909 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1910 | * Complete the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1912 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | if (error) { |
| 1914 | goto error0; |
| 1915 | } |
| 1916 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1917 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1919 | if (error) { |
| 1920 | break; |
| 1921 | } |
| 1922 | |
| 1923 | allocated_fsb = imapp->br_blockcount; |
| 1924 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1925 | if (nimaps == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | error = XFS_ERROR(ENOSPC); |
| 1927 | break; |
| 1928 | } |
| 1929 | |
| 1930 | startoffset_fsb += allocated_fsb; |
| 1931 | allocatesize_fsb -= allocated_fsb; |
| 1932 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | |
| 1934 | return error; |
| 1935 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1936 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | xfs_bmap_cancel(&free_list); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1938 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1939 | |
| 1940 | error1: /* Just cancel transaction */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 1942 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1943 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | } |
| 1945 | |
| 1946 | /* |
| 1947 | * Zero file bytes between startoff and endoff inclusive. |
| 1948 | * The iolock is held exclusive and no blocks are buffered. |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1949 | * |
| 1950 | * This function is used by xfs_free_file_space() to zero |
| 1951 | * partial blocks when the range to free is not block aligned. |
| 1952 | * When unreserving space with boundaries that are not block |
| 1953 | * aligned we round up the start and round down the end |
| 1954 | * boundaries and then use this function to zero the parts of |
| 1955 | * the blocks that got dropped during the rounding. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | */ |
| 1957 | STATIC int |
| 1958 | xfs_zero_remaining_bytes( |
| 1959 | xfs_inode_t *ip, |
| 1960 | xfs_off_t startoff, |
| 1961 | xfs_off_t endoff) |
| 1962 | { |
| 1963 | xfs_bmbt_irec_t imap; |
| 1964 | xfs_fileoff_t offset_fsb; |
| 1965 | xfs_off_t lastoffset; |
| 1966 | xfs_off_t offset; |
| 1967 | xfs_buf_t *bp; |
| 1968 | xfs_mount_t *mp = ip->i_mount; |
| 1969 | int nimap; |
| 1970 | int error = 0; |
| 1971 | |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1972 | /* |
| 1973 | * Avoid doing I/O beyond eof - it's not necessary |
| 1974 | * since nothing can read beyond eof. The space will |
| 1975 | * be zeroed when the file is extended anyway. |
| 1976 | */ |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 1977 | if (startoff >= XFS_ISIZE(ip)) |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1978 | return 0; |
| 1979 | |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 1980 | if (endoff > XFS_ISIZE(ip)) |
| 1981 | endoff = XFS_ISIZE(ip); |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1982 | |
Dave Chinner | 686865f | 2010-09-24 20:07:47 +1000 | [diff] [blame] | 1983 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
| 1984 | mp->m_rtdev_targp : mp->m_ddev_targp, |
| 1985 | mp->m_sb.sb_blocksize, XBF_DONT_BLOCK); |
Lachlan McIlroy | c642261 | 2008-12-05 13:16:15 +1100 | [diff] [blame] | 1986 | if (!bp) |
| 1987 | return XFS_ERROR(ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | |
Christoph Hellwig | c8da0fa | 2011-07-08 14:36:25 +0200 | [diff] [blame] | 1989 | xfs_buf_unlock(bp); |
| 1990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
| 1992 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1993 | nimap = 1; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 1994 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | if (error || nimap < 1) |
| 1996 | break; |
| 1997 | ASSERT(imap.br_blockcount >= 1); |
| 1998 | ASSERT(imap.br_startoff == offset_fsb); |
| 1999 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; |
| 2000 | if (lastoffset > endoff) |
| 2001 | lastoffset = endoff; |
| 2002 | if (imap.br_startblock == HOLESTARTBLOCK) |
| 2003 | continue; |
| 2004 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 2005 | if (imap.br_state == XFS_EXT_UNWRITTEN) |
| 2006 | continue; |
| 2007 | XFS_BUF_UNDONE(bp); |
| 2008 | XFS_BUF_UNWRITE(bp); |
| 2009 | XFS_BUF_READ(bp); |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2010 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | xfsbdstrat(mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2012 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 2013 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 2014 | xfs_buf_ioerror_alert(bp, |
| 2015 | "xfs_zero_remaining_bytes(read)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | break; |
| 2017 | } |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 2018 | memset(bp->b_addr + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
| 2020 | 0, lastoffset - offset + 1); |
| 2021 | XFS_BUF_UNDONE(bp); |
| 2022 | XFS_BUF_UNREAD(bp); |
| 2023 | XFS_BUF_WRITE(bp); |
| 2024 | xfsbdstrat(mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2025 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 2026 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 2027 | xfs_buf_ioerror_alert(bp, |
| 2028 | "xfs_zero_remaining_bytes(write)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | break; |
| 2030 | } |
| 2031 | } |
| 2032 | xfs_buf_free(bp); |
| 2033 | return error; |
| 2034 | } |
| 2035 | |
| 2036 | /* |
| 2037 | * xfs_free_file_space() |
| 2038 | * This routine frees disk space for the given file. |
| 2039 | * |
| 2040 | * This routine is only called by xfs_change_file_space |
| 2041 | * for an UNRESVSP type call. |
| 2042 | * |
| 2043 | * RETURNS: |
| 2044 | * 0 on success |
| 2045 | * errno on error |
| 2046 | * |
| 2047 | */ |
| 2048 | STATIC int |
| 2049 | xfs_free_file_space( |
| 2050 | xfs_inode_t *ip, |
| 2051 | xfs_off_t offset, |
| 2052 | xfs_off_t len, |
| 2053 | int attr_flags) |
| 2054 | { |
| 2055 | int committed; |
| 2056 | int done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | xfs_fileoff_t endoffset_fsb; |
| 2058 | int error; |
| 2059 | xfs_fsblock_t firstfsb; |
| 2060 | xfs_bmap_free_t free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | xfs_bmbt_irec_t imap; |
| 2062 | xfs_off_t ioffset; |
| 2063 | xfs_extlen_t mod=0; |
| 2064 | xfs_mount_t *mp; |
| 2065 | int nimap; |
| 2066 | uint resblks; |
Nathan Scott | 673cdf5 | 2006-09-28 10:56:26 +1000 | [diff] [blame] | 2067 | uint rounding; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2068 | int rt; |
| 2069 | xfs_fileoff_t startoffset_fsb; |
| 2070 | xfs_trans_t *tp; |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2071 | int need_iolock = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | mp = ip->i_mount; |
| 2074 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 2075 | trace_xfs_free_file_space(ip); |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2076 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 2077 | error = xfs_qm_dqattach(ip, 0); |
| 2078 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | return error; |
| 2080 | |
| 2081 | error = 0; |
| 2082 | if (len <= 0) /* if nothing being freed */ |
| 2083 | return error; |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 2084 | rt = XFS_IS_REALTIME_INODE(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2086 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2088 | if (attr_flags & XFS_ATTR_NOLOCK) |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2089 | need_iolock = 0; |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 2090 | if (need_iolock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 2092 | /* wait for the completion of any pending DIOs */ |
Christoph Hellwig | 4a06fd2 | 2011-08-23 08:28:13 +0000 | [diff] [blame] | 2093 | inode_dio_wait(VFS_I(ip)); |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 2094 | } |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2095 | |
Tim Shimmin | e6a4b37 | 2007-11-23 16:30:42 +1100 | [diff] [blame] | 2096 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | ioffset = offset & ~(rounding - 1); |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2098 | |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 2099 | if (VN_CACHED(VFS_I(ip)) != 0) { |
Tim Shimmin | e6a4b37 | 2007-11-23 16:30:42 +1100 | [diff] [blame] | 2100 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 2101 | if (error) |
| 2102 | goto out_unlock_iolock; |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2103 | } |
| 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | /* |
| 2106 | * Need to zero the stuff we're not freeing, on disk. |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 2107 | * If it's a realtime file & can't use unwritten extents then we |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
| 2109 | * will take care of it for us. |
| 2110 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 2111 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | nimap = 1; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 2113 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
| 2114 | &imap, &nimap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | if (error) |
| 2116 | goto out_unlock_iolock; |
| 2117 | ASSERT(nimap == 0 || nimap == 1); |
| 2118 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 2119 | xfs_daddr_t block; |
| 2120 | |
| 2121 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 2122 | block = imap.br_startblock; |
| 2123 | mod = do_div(block, mp->m_sb.sb_rextsize); |
| 2124 | if (mod) |
| 2125 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; |
| 2126 | } |
| 2127 | nimap = 1; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 2128 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
| 2129 | &imap, &nimap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | if (error) |
| 2131 | goto out_unlock_iolock; |
| 2132 | ASSERT(nimap == 0 || nimap == 1); |
| 2133 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 2134 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 2135 | mod++; |
| 2136 | if (mod && (mod != mp->m_sb.sb_rextsize)) |
| 2137 | endoffset_fsb -= mod; |
| 2138 | } |
| 2139 | } |
| 2140 | if ((done = (endoffset_fsb <= startoffset_fsb))) |
| 2141 | /* |
| 2142 | * One contiguous piece to clear |
| 2143 | */ |
| 2144 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); |
| 2145 | else { |
| 2146 | /* |
| 2147 | * Some full blocks, possibly two pieces to clear |
| 2148 | */ |
| 2149 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) |
| 2150 | error = xfs_zero_remaining_bytes(ip, offset, |
| 2151 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); |
| 2152 | if (!error && |
| 2153 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) |
| 2154 | error = xfs_zero_remaining_bytes(ip, |
| 2155 | XFS_FSB_TO_B(mp, endoffset_fsb), |
| 2156 | offset + len - 1); |
| 2157 | } |
| 2158 | |
| 2159 | /* |
| 2160 | * free file space until done or until there is an error |
| 2161 | */ |
| 2162 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 2163 | while (!error && !done) { |
| 2164 | |
| 2165 | /* |
David Chinner | 91ebecc | 2007-07-19 16:28:30 +1000 | [diff] [blame] | 2166 | * allocate and setup the transaction. Allow this |
| 2167 | * transaction to dip into the reserve blocks to ensure |
| 2168 | * the freeing of the space succeeds at ENOSPC. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | */ |
| 2170 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
David Chinner | 91ebecc | 2007-07-19 16:28:30 +1000 | [diff] [blame] | 2171 | tp->t_flags |= XFS_TRANS_RESERVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | error = xfs_trans_reserve(tp, |
| 2173 | resblks, |
| 2174 | XFS_WRITE_LOG_RES(mp), |
| 2175 | 0, |
| 2176 | XFS_TRANS_PERM_LOG_RES, |
| 2177 | XFS_WRITE_LOG_COUNT); |
| 2178 | |
| 2179 | /* |
| 2180 | * check for running out of space |
| 2181 | */ |
| 2182 | if (error) { |
| 2183 | /* |
| 2184 | * Free the transaction structure. |
| 2185 | */ |
| 2186 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 2187 | xfs_trans_cancel(tp, 0); |
| 2188 | break; |
| 2189 | } |
| 2190 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 2191 | error = xfs_trans_reserve_quota(tp, mp, |
| 2192 | ip->i_udquot, ip->i_gdquot, |
| 2193 | resblks, 0, XFS_QMOPT_RES_REGBLKS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | if (error) |
| 2195 | goto error1; |
| 2196 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 2197 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | |
| 2199 | /* |
| 2200 | * issue the bunmapi() call to free the blocks |
| 2201 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2202 | xfs_bmap_init(&free_list, &firstfsb); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 2203 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | endoffset_fsb - startoffset_fsb, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2205 | 0, 2, &firstfsb, &free_list, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | if (error) { |
| 2207 | goto error0; |
| 2208 | } |
| 2209 | |
| 2210 | /* |
| 2211 | * complete the transaction |
| 2212 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2213 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | if (error) { |
| 2215 | goto error0; |
| 2216 | } |
| 2217 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 2218 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2220 | } |
| 2221 | |
| 2222 | out_unlock_iolock: |
| 2223 | if (need_iolock) |
| 2224 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 2225 | return error; |
| 2226 | |
| 2227 | error0: |
| 2228 | xfs_bmap_cancel(&free_list); |
| 2229 | error1: |
| 2230 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 2231 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : |
| 2232 | XFS_ILOCK_EXCL); |
| 2233 | return error; |
| 2234 | } |
| 2235 | |
| 2236 | /* |
| 2237 | * xfs_change_file_space() |
| 2238 | * This routine allocates or frees disk space for the given file. |
| 2239 | * The user specified parameters are checked for alignment and size |
| 2240 | * limitations. |
| 2241 | * |
| 2242 | * RETURNS: |
| 2243 | * 0 on success |
| 2244 | * errno on error |
| 2245 | * |
| 2246 | */ |
| 2247 | int |
| 2248 | xfs_change_file_space( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2249 | xfs_inode_t *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | int cmd, |
| 2251 | xfs_flock64_t *bf, |
| 2252 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | int attr_flags) |
| 2254 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2255 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | int clrprealloc; |
| 2257 | int error; |
| 2258 | xfs_fsize_t fsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | int setprealloc; |
| 2260 | xfs_off_t startoffset; |
| 2261 | xfs_off_t llen; |
| 2262 | xfs_trans_t *tp; |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2263 | struct iattr iattr; |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2264 | int prealloc_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2266 | if (!S_ISREG(ip->i_d.di_mode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | return XFS_ERROR(EINVAL); |
| 2268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | switch (bf->l_whence) { |
| 2270 | case 0: /*SEEK_SET*/ |
| 2271 | break; |
| 2272 | case 1: /*SEEK_CUR*/ |
| 2273 | bf->l_start += offset; |
| 2274 | break; |
| 2275 | case 2: /*SEEK_END*/ |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 2276 | bf->l_start += XFS_ISIZE(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | break; |
| 2278 | default: |
| 2279 | return XFS_ERROR(EINVAL); |
| 2280 | } |
| 2281 | |
| 2282 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; |
| 2283 | |
| 2284 | if ( (bf->l_start < 0) |
| 2285 | || (bf->l_start > XFS_MAXIOFFSET(mp)) |
| 2286 | || (bf->l_start + llen < 0) |
| 2287 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) |
| 2288 | return XFS_ERROR(EINVAL); |
| 2289 | |
| 2290 | bf->l_whence = 0; |
| 2291 | |
| 2292 | startoffset = bf->l_start; |
Christoph Hellwig | ce7ae15 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 2293 | fsize = XFS_ISIZE(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | |
| 2295 | /* |
| 2296 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve |
| 2297 | * file space. |
| 2298 | * These calls do NOT zero the data space allocated to the file, |
| 2299 | * nor do they change the file size. |
| 2300 | * |
| 2301 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file |
| 2302 | * space. |
| 2303 | * These calls cause the new file data to be zeroed and the file |
| 2304 | * size to be changed. |
| 2305 | */ |
| 2306 | setprealloc = clrprealloc = 0; |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2307 | prealloc_type = XFS_BMAPI_PREALLOC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | |
| 2309 | switch (cmd) { |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2310 | case XFS_IOC_ZERO_RANGE: |
| 2311 | prealloc_type |= XFS_BMAPI_CONVERT; |
| 2312 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); |
| 2313 | /* FALLTHRU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | case XFS_IOC_RESVSP: |
| 2315 | case XFS_IOC_RESVSP64: |
| 2316 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2317 | prealloc_type, attr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | if (error) |
| 2319 | return error; |
| 2320 | setprealloc = 1; |
| 2321 | break; |
| 2322 | |
| 2323 | case XFS_IOC_UNRESVSP: |
| 2324 | case XFS_IOC_UNRESVSP64: |
| 2325 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, |
| 2326 | attr_flags))) |
| 2327 | return error; |
| 2328 | break; |
| 2329 | |
| 2330 | case XFS_IOC_ALLOCSP: |
| 2331 | case XFS_IOC_ALLOCSP64: |
| 2332 | case XFS_IOC_FREESP: |
| 2333 | case XFS_IOC_FREESP64: |
| 2334 | if (startoffset > fsize) { |
| 2335 | error = xfs_alloc_file_space(ip, fsize, |
| 2336 | startoffset - fsize, 0, attr_flags); |
| 2337 | if (error) |
| 2338 | break; |
| 2339 | } |
| 2340 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2341 | iattr.ia_valid = ATTR_SIZE; |
| 2342 | iattr.ia_size = startoffset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 2344 | error = xfs_setattr_size(ip, &iattr, attr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | |
| 2346 | if (error) |
| 2347 | return error; |
| 2348 | |
| 2349 | clrprealloc = 1; |
| 2350 | break; |
| 2351 | |
| 2352 | default: |
| 2353 | ASSERT(0); |
| 2354 | return XFS_ERROR(EINVAL); |
| 2355 | } |
| 2356 | |
| 2357 | /* |
| 2358 | * update the inode timestamp, mode, and prealloc flag bits |
| 2359 | */ |
| 2360 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); |
| 2361 | |
| 2362 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), |
| 2363 | 0, 0, 0))) { |
| 2364 | /* ASSERT(0); */ |
| 2365 | xfs_trans_cancel(tp, 0); |
| 2366 | return error; |
| 2367 | } |
| 2368 | |
| 2369 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 2370 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2372 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | ip->i_d.di_mode &= ~S_ISUID; |
| 2374 | |
| 2375 | /* |
| 2376 | * Note that we don't have to worry about mandatory |
| 2377 | * file locking being disabled here because we only |
| 2378 | * clear the S_ISGID bit if the Group execute bit is |
| 2379 | * on, but if it was on then mandatory locking wouldn't |
| 2380 | * have been enabled. |
| 2381 | */ |
| 2382 | if (ip->i_d.di_mode & S_IXGRP) |
| 2383 | ip->i_d.di_mode &= ~S_ISGID; |
| 2384 | |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 2385 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | } |
| 2387 | if (setprealloc) |
| 2388 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; |
| 2389 | else if (clrprealloc) |
| 2390 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; |
| 2391 | |
| 2392 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
Dave Chinner | 8287889 | 2011-03-26 09:13:08 +1100 | [diff] [blame] | 2393 | if (attr_flags & XFS_ATTR_SYNC) |
| 2394 | xfs_trans_set_sync(tp); |
Christoph Hellwig | 23bb0be | 2011-09-18 20:47:51 +0000 | [diff] [blame] | 2395 | return xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | } |