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 | |
| 75 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), 0, NULL, 0, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 76 | mval, &nmaps, NULL); |
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) { |
| 90 | xfs_ioerror_alert("xfs_readlink", |
| 91 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); |
| 92 | xfs_buf_relse(bp); |
| 93 | goto out; |
| 94 | } |
| 95 | if (pathlen < byte_cnt) |
| 96 | byte_cnt = pathlen; |
| 97 | pathlen -= byte_cnt; |
| 98 | |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 99 | memcpy(link, bp->b_addr, byte_cnt); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 100 | xfs_buf_relse(bp); |
| 101 | } |
| 102 | |
| 103 | link[ip->i_d.di_size] = '\0'; |
| 104 | error = 0; |
| 105 | |
| 106 | out: |
| 107 | return error; |
| 108 | } |
| 109 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 110 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | xfs_readlink( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 112 | xfs_inode_t *ip, |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 113 | char *link) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 115 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | int pathlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 119 | trace_xfs_readlink(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 122 | return XFS_ERROR(EIO); |
| 123 | |
| 124 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 125 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 126 | ASSERT(S_ISLNK(ip->i_d.di_mode)); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 127 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 129 | pathlen = ip->i_d.di_size; |
| 130 | if (!pathlen) |
| 131 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
| 133 | if (ip->i_df.if_flags & XFS_IFINLINE) { |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 134 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
| 135 | link[pathlen] = '\0'; |
| 136 | } else { |
| 137 | error = xfs_readlink_bmap(ip, link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 140 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | return error; |
| 143 | } |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /* |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 146 | * Flags for xfs_free_eofblocks |
| 147 | */ |
| 148 | #define XFS_FREE_EOF_TRYLOCK (1<<0) |
| 149 | |
| 150 | /* |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 151 | * This is called by xfs_inactive to free any blocks beyond eof |
| 152 | * when the link count isn't zero and by xfs_dm_punch_hole() when |
| 153 | * punching a hole to EOF. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 155 | STATIC int |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 156 | xfs_free_eofblocks( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | xfs_mount_t *mp, |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 158 | xfs_inode_t *ip, |
| 159 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
| 161 | xfs_trans_t *tp; |
| 162 | int error; |
| 163 | xfs_fileoff_t end_fsb; |
| 164 | xfs_fileoff_t last_fsb; |
| 165 | xfs_filblks_t map_len; |
| 166 | int nimaps; |
| 167 | xfs_bmbt_irec_t imap; |
| 168 | |
| 169 | /* |
| 170 | * Figure out if there are any blocks beyond the end |
| 171 | * of the file. If not, then there is nothing to do. |
| 172 | */ |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 173 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | 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] | 175 | if (last_fsb <= end_fsb) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 176 | return 0; |
Kulikov Vasiliy | 3f34885 | 2010-07-20 17:54:28 +1000 | [diff] [blame] | 177 | map_len = last_fsb - end_fsb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | nimaps = 1; |
| 180 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 181 | error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 182 | NULL, 0, &imap, &nimaps, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 184 | |
| 185 | if (!error && (nimaps != 0) && |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 186 | (imap.br_startblock != HOLESTARTBLOCK || |
| 187 | ip->i_delayed_blks)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | /* |
| 189 | * Attach the dquots to the inode up front. |
| 190 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 191 | error = xfs_qm_dqattach(ip, 0); |
| 192 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 193 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | /* |
| 196 | * There are blocks after the end of file. |
| 197 | * Free them up now by truncating the file to |
| 198 | * its current size. |
| 199 | */ |
| 200 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 201 | |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 202 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
| 203 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { |
| 204 | xfs_trans_cancel(tp, 0); |
| 205 | return 0; |
| 206 | } |
| 207 | } else { |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 208 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | error = xfs_trans_reserve(tp, 0, |
| 212 | XFS_ITRUNCATE_LOG_RES(mp), |
| 213 | 0, XFS_TRANS_PERM_LOG_RES, |
| 214 | XFS_ITRUNCATE_LOG_COUNT); |
| 215 | if (error) { |
| 216 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 217 | xfs_trans_cancel(tp, 0); |
| 218 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 219 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 223 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 225 | error = xfs_itruncate_data(&tp, ip, ip->i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | if (error) { |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 227 | /* |
| 228 | * If we get an error at this point we simply don't |
| 229 | * bother truncating the file. |
| 230 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | xfs_trans_cancel(tp, |
| 232 | (XFS_TRANS_RELEASE_LOG_RES | |
| 233 | XFS_TRANS_ABORT)); |
| 234 | } else { |
| 235 | error = xfs_trans_commit(tp, |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 236 | XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 238 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 240 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | /* |
| 244 | * Free a symlink that has blocks associated with it. |
| 245 | */ |
| 246 | STATIC int |
| 247 | xfs_inactive_symlink_rmt( |
| 248 | xfs_inode_t *ip, |
| 249 | xfs_trans_t **tpp) |
| 250 | { |
| 251 | xfs_buf_t *bp; |
| 252 | int committed; |
| 253 | int done; |
| 254 | int error; |
| 255 | xfs_fsblock_t first_block; |
| 256 | xfs_bmap_free_t free_list; |
| 257 | int i; |
| 258 | xfs_mount_t *mp; |
| 259 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 260 | int nmaps; |
| 261 | xfs_trans_t *ntp; |
| 262 | int size; |
| 263 | xfs_trans_t *tp; |
| 264 | |
| 265 | tp = *tpp; |
| 266 | mp = ip->i_mount; |
| 267 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); |
| 268 | /* |
| 269 | * We're freeing a symlink that has some |
| 270 | * blocks allocated to it. Free the |
| 271 | * blocks here. We know that we've got |
| 272 | * either 1 or 2 extents and that we can |
| 273 | * free them all in one bunmapi call. |
| 274 | */ |
| 275 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); |
| 276 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 277 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 278 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 279 | xfs_trans_cancel(tp, 0); |
| 280 | *tpp = NULL; |
| 281 | return error; |
| 282 | } |
| 283 | /* |
| 284 | * Lock the inode, fix the size, and join it to the transaction. |
| 285 | * Hold it so in the normal path, we still have it locked for |
| 286 | * the second transaction. In the error paths we need it |
| 287 | * held so the cancel won't rele it, see below. |
| 288 | */ |
| 289 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 290 | size = (int)ip->i_d.di_size; |
| 291 | ip->i_d.di_size = 0; |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 292 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 294 | /* |
| 295 | * Find the block(s) so we can inval and unmap them. |
| 296 | */ |
| 297 | done = 0; |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 298 | xfs_bmap_init(&free_list, &first_block); |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 299 | nmaps = ARRAY_SIZE(mval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
| 301 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 302 | &free_list))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | goto error0; |
| 304 | /* |
| 305 | * Invalidate the block(s). |
| 306 | */ |
| 307 | for (i = 0; i < nmaps; i++) { |
| 308 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
| 309 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), |
| 310 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); |
| 311 | xfs_trans_binval(tp, bp); |
| 312 | } |
| 313 | /* |
| 314 | * Unmap the dead block(s) to the free_list. |
| 315 | */ |
| 316 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 317 | &first_block, &free_list, &done))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | goto error1; |
| 319 | ASSERT(done); |
| 320 | /* |
| 321 | * Commit the first transaction. This logs the EFI and the inode. |
| 322 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 323 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | goto error1; |
| 325 | /* |
| 326 | * The transaction must have been committed, since there were |
| 327 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. |
| 328 | * The new tp has the extent freeing and EFDs. |
| 329 | */ |
| 330 | ASSERT(committed); |
| 331 | /* |
| 332 | * The first xact was committed, so add the inode to the new one. |
| 333 | * Mark it dirty so it will be logged and moved forward in the log as |
| 334 | * part of every commit. |
| 335 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 336 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 338 | /* |
| 339 | * Get a new, empty transaction to return to our caller. |
| 340 | */ |
| 341 | ntp = xfs_trans_dup(tp); |
| 342 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 343 | * Commit the transaction containing extent freeing and EFDs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | * If we get an error on the commit here or on the reserve below, |
| 345 | * we need to unlock the inode since the new transaction doesn't |
| 346 | * have the inode attached. |
| 347 | */ |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 348 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | tp = ntp; |
| 350 | if (error) { |
| 351 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 352 | goto error0; |
| 353 | } |
| 354 | /* |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 355 | * transaction commit worked ok so we can drop the extra ticket |
| 356 | * reference that we gained in xfs_trans_dup() |
| 357 | */ |
| 358 | xfs_log_ticket_put(tp->t_ticket); |
| 359 | |
| 360 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | * Remove the memory for extent descriptions (just bookkeeping). |
| 362 | */ |
| 363 | if (ip->i_df.if_bytes) |
| 364 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); |
| 365 | ASSERT(ip->i_df.if_bytes == 0); |
| 366 | /* |
| 367 | * Put an itruncate log reservation in the new transaction |
| 368 | * for our caller. |
| 369 | */ |
| 370 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 371 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 372 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 373 | goto error0; |
| 374 | } |
| 375 | /* |
| 376 | * Return with the inode locked but not joined to the transaction. |
| 377 | */ |
| 378 | *tpp = tp; |
| 379 | return 0; |
| 380 | |
| 381 | error1: |
| 382 | xfs_bmap_cancel(&free_list); |
| 383 | error0: |
| 384 | /* |
| 385 | * Have to come here with the inode locked and either |
| 386 | * (held and in the transaction) or (not in the transaction). |
| 387 | * If the inode isn't held then cancel would iput it, but |
| 388 | * that's wrong since this is inactive and the vnode ref |
| 389 | * count is 0 already. |
| 390 | * Cancel won't do anything to the inode if held, but it still |
| 391 | * needs to be locked until the cancel is done, if it was |
| 392 | * joined to the transaction. |
| 393 | */ |
| 394 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 395 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 396 | *tpp = NULL; |
| 397 | return error; |
| 398 | |
| 399 | } |
| 400 | |
| 401 | STATIC int |
| 402 | xfs_inactive_symlink_local( |
| 403 | xfs_inode_t *ip, |
| 404 | xfs_trans_t **tpp) |
| 405 | { |
| 406 | int error; |
| 407 | |
| 408 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); |
| 409 | /* |
| 410 | * We're freeing a symlink which fit into |
| 411 | * the inode. Just free the memory used |
| 412 | * to hold the old symlink. |
| 413 | */ |
| 414 | error = xfs_trans_reserve(*tpp, 0, |
| 415 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), |
| 416 | 0, XFS_TRANS_PERM_LOG_RES, |
| 417 | XFS_ITRUNCATE_LOG_COUNT); |
| 418 | |
| 419 | if (error) { |
| 420 | xfs_trans_cancel(*tpp, 0); |
| 421 | *tpp = NULL; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 422 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 425 | |
| 426 | /* |
| 427 | * Zero length symlinks _can_ exist. |
| 428 | */ |
| 429 | if (ip->i_df.if_bytes > 0) { |
| 430 | xfs_idata_realloc(ip, |
| 431 | -(ip->i_df.if_bytes), |
| 432 | XFS_DATA_FORK); |
| 433 | ASSERT(ip->i_df.if_bytes == 0); |
| 434 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 435 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
| 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | STATIC int |
| 439 | xfs_inactive_attrs( |
| 440 | xfs_inode_t *ip, |
| 441 | xfs_trans_t **tpp) |
| 442 | { |
| 443 | xfs_trans_t *tp; |
| 444 | int error; |
| 445 | xfs_mount_t *mp; |
| 446 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 447 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | tp = *tpp; |
| 449 | mp = ip->i_mount; |
| 450 | ASSERT(ip->i_d.di_forkoff != 0); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 451 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 453 | if (error) |
| 454 | goto error_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | error = xfs_attr_inactive(ip); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 457 | if (error) |
| 458 | goto error_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 461 | error = xfs_trans_reserve(tp, 0, |
| 462 | XFS_IFREE_LOG_RES(mp), |
| 463 | 0, XFS_TRANS_PERM_LOG_RES, |
| 464 | XFS_INACTIVE_LOG_COUNT); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 465 | if (error) |
| 466 | goto error_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 469 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 471 | |
| 472 | ASSERT(ip->i_d.di_anextents == 0); |
| 473 | |
| 474 | *tpp = tp; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 475 | return 0; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 476 | |
| 477 | error_cancel: |
| 478 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 479 | xfs_trans_cancel(tp, 0); |
| 480 | error_unlock: |
| 481 | *tpp = NULL; |
| 482 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 483 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | } |
| 485 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 486 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | xfs_release( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 488 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 490 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | int error; |
| 492 | |
Christoph Hellwig | 42173f6 | 2008-04-22 17:33:25 +1000 | [diff] [blame] | 493 | 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] | 494 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
| 496 | /* 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] | 497 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | return 0; |
| 499 | |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 500 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
Christoph Hellwig | b3aea4e | 2007-08-29 11:44:37 +1000 | [diff] [blame] | 501 | int truncated; |
| 502 | |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 503 | /* |
| 504 | * If we are using filestreams, and we have an unlinked |
| 505 | * file that we are processing the last close on, then nothing |
| 506 | * will be able to reopen and write to this file. Purge this |
| 507 | * inode from the filestreams cache so that it doesn't delay |
| 508 | * teardown of the inode. |
| 509 | */ |
| 510 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) |
| 511 | xfs_filestream_deassociate(ip); |
| 512 | |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 513 | /* |
| 514 | * If we previously truncated this file and removed old data |
| 515 | * in the process, we want to initiate "early" writeout on |
| 516 | * the last close. This is an attempt to combat the notorious |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 517 | * NULL files problem which is particularly noticeable from a |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 518 | * truncate down, buffered (re-)write (delalloc), followed by |
| 519 | * a crash. What we are effectively doing here is |
| 520 | * significantly reducing the time window where we'd otherwise |
| 521 | * be exposed to that problem. |
| 522 | */ |
Christoph Hellwig | 09262b4 | 2007-08-29 11:44:50 +1000 | [diff] [blame] | 523 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
Dave Chinner | df4368a | 2011-06-23 01:35:00 +0000 | [diff] [blame] | 524 | if (truncated) { |
| 525 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); |
| 526 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) |
| 527 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); |
| 528 | } |
Christoph Hellwig | fbf3ce8 | 2007-06-28 16:46:47 +1000 | [diff] [blame] | 529 | } |
| 530 | |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 531 | if (ip->i_d.di_nlink == 0) |
| 532 | return 0; |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 533 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 534 | if ((S_ISREG(ip->i_d.di_mode) && |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 535 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
| 536 | ip->i_delayed_blks > 0)) && |
| 537 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
| 538 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { |
| 539 | |
| 540 | /* |
| 541 | * If we can't get the iolock just skip truncating the blocks |
| 542 | * past EOF because we could deadlock with the mmap_sem |
| 543 | * otherwise. We'll get another chance to drop them once the |
| 544 | * last reference to the inode is dropped, so we'll never leak |
| 545 | * blocks permanently. |
| 546 | * |
| 547 | * Further, check if the inode is being opened, written and |
| 548 | * closed frequently and we have delayed allocation blocks |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 549 | * outstanding (e.g. streaming writes from the NFS server), |
Dave Chinner | 6e85756 | 2010-12-23 12:02:31 +1100 | [diff] [blame] | 550 | * truncating the blocks past EOF will cause fragmentation to |
| 551 | * occur. |
| 552 | * |
| 553 | * In this case don't do the truncation, either, but we have to |
| 554 | * be careful how we detect this case. Blocks beyond EOF show |
| 555 | * up as i_delayed_blks even when the inode is clean, so we |
| 556 | * need to truncate them away first before checking for a dirty |
| 557 | * release. Hence on the first dirty close we will still remove |
| 558 | * the speculative allocation, but after that we will leave it |
| 559 | * in place. |
| 560 | */ |
| 561 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) |
| 562 | return 0; |
| 563 | |
| 564 | error = xfs_free_eofblocks(mp, ip, |
| 565 | XFS_FREE_EOF_TRYLOCK); |
| 566 | if (error) |
| 567 | return error; |
| 568 | |
| 569 | /* delalloc blocks after truncation means it really is dirty */ |
| 570 | if (ip->i_delayed_blks) |
| 571 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * xfs_inactive |
| 578 | * |
| 579 | * This is called when the vnode reference count for the vnode |
| 580 | * goes to zero. If the file has been unlinked, then it must |
| 581 | * now be truncated. Also, we clear all of the read-ahead state |
| 582 | * kept for the inode here since the file is now closed. |
| 583 | */ |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 584 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | xfs_inactive( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 586 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | { |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 588 | xfs_bmap_free_t free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | xfs_fsblock_t first_block; |
| 590 | int committed; |
| 591 | xfs_trans_t *tp; |
| 592 | xfs_mount_t *mp; |
| 593 | int error; |
| 594 | int truncate; |
| 595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | /* |
| 597 | * If the inode is already free, then there can be nothing |
| 598 | * to clean up here. |
| 599 | */ |
Christoph Hellwig | cb4c8cc | 2009-03-16 08:25:25 +0100 | [diff] [blame] | 600 | 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] | 601 | ASSERT(ip->i_df.if_real_bytes == 0); |
| 602 | ASSERT(ip->i_df.if_broot_bytes == 0); |
| 603 | return VN_INACTIVE_CACHE; |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * Only do a truncate if it's a regular file with |
| 608 | * some actual space in it. It's OK to look at the |
| 609 | * inode's fields without the lock because we're the |
| 610 | * only one with a reference to the inode. |
| 611 | */ |
| 612 | truncate = ((ip->i_d.di_nlink == 0) && |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 613 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
| 614 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 615 | S_ISREG(ip->i_d.di_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
| 617 | mp = ip->i_mount; |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | error = 0; |
| 620 | |
| 621 | /* 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] | 622 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | goto out; |
| 624 | |
| 625 | if (ip->i_d.di_nlink != 0) { |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 626 | if ((S_ISREG(ip->i_d.di_mode) && |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 627 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 628 | ip->i_delayed_blks > 0)) && |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 629 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
| 630 | (!(ip->i_d.di_flags & |
| 631 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || |
| 632 | (ip->i_delayed_blks != 0)))) { |
Christoph Hellwig | c56c9631 | 2009-10-19 04:03:46 +0000 | [diff] [blame] | 633 | error = xfs_free_eofblocks(mp, ip, 0); |
David Chinner | 92dfe8d | 2007-05-24 15:22:19 +1000 | [diff] [blame] | 634 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 635 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } |
| 637 | goto out; |
| 638 | } |
| 639 | |
| 640 | ASSERT(ip->i_d.di_nlink == 0); |
| 641 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 642 | error = xfs_qm_dqattach(ip, 0); |
| 643 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 644 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 647 | if (truncate) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 649 | |
Christoph Hellwig | 857b977 | 2011-07-08 14:34:30 +0200 | [diff] [blame] | 650 | xfs_ioend_wait(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | error = xfs_trans_reserve(tp, 0, |
| 653 | XFS_ITRUNCATE_LOG_RES(mp), |
| 654 | 0, XFS_TRANS_PERM_LOG_RES, |
| 655 | XFS_ITRUNCATE_LOG_COUNT); |
| 656 | if (error) { |
| 657 | /* Don't call itruncate_cleanup */ |
| 658 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 659 | xfs_trans_cancel(tp, 0); |
| 660 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 661 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 665 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 667 | error = xfs_itruncate_data(&tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | if (error) { |
| 669 | xfs_trans_cancel(tp, |
| 670 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 671 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 672 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | } |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 674 | } else if (S_ISLNK(ip->i_d.di_mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | /* |
| 677 | * If we get an error while cleaning up a |
| 678 | * symlink we bail out. |
| 679 | */ |
| 680 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? |
| 681 | xfs_inactive_symlink_rmt(ip, &tp) : |
| 682 | xfs_inactive_symlink_local(ip, &tp); |
| 683 | |
| 684 | if (error) { |
| 685 | ASSERT(tp == NULL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 686 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
| 688 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 689 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } else { |
| 691 | error = xfs_trans_reserve(tp, 0, |
| 692 | XFS_IFREE_LOG_RES(mp), |
| 693 | 0, XFS_TRANS_PERM_LOG_RES, |
| 694 | XFS_INACTIVE_LOG_COUNT); |
| 695 | if (error) { |
| 696 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 697 | xfs_trans_cancel(tp, 0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 698 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 702 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } |
| 704 | |
| 705 | /* |
| 706 | * If there are attributes associated with the file |
| 707 | * then blow them away now. The code calls a routine |
| 708 | * that recursively deconstructs the attribute fork. |
| 709 | * We need to just commit the current transaction |
| 710 | * because we can't use it for xfs_attr_inactive(). |
| 711 | */ |
| 712 | if (ip->i_d.di_anextents > 0) { |
| 713 | error = xfs_inactive_attrs(ip, &tp); |
| 714 | /* |
| 715 | * If we got an error, the transaction is already |
| 716 | * cancelled, and the inode is unlocked. Just get out. |
| 717 | */ |
| 718 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 719 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | } else if (ip->i_afp) { |
| 721 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * Free the inode. |
| 726 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 727 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | error = xfs_ifree(tp, ip, &free_list); |
| 729 | if (error) { |
| 730 | /* |
| 731 | * If we fail to free the inode, shut down. The cancel |
| 732 | * might do that, we need to make sure. Otherwise the |
| 733 | * inode might be lost for a long time or forever. |
| 734 | */ |
| 735 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 736 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
| 737 | __func__, error); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 738 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } |
| 740 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 741 | } else { |
| 742 | /* |
| 743 | * Credit the quota account(s). The inode is gone. |
| 744 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 745 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | /* |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 748 | * Just ignore errors at this point. There is nothing we can |
| 749 | * do except to try to keep going. Make sure it's not a silent |
| 750 | * error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | */ |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 752 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
| 753 | if (error) |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 754 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
| 755 | __func__, error); |
David Chinner | 78e9da7 | 2008-04-10 12:24:17 +1000 | [diff] [blame] | 756 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
| 757 | if (error) |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 758 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
| 759 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | /* |
| 763 | * Release the dquots held by inode, if any. |
| 764 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 765 | xfs_qm_dqdetach(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 767 | |
| 768 | out: |
| 769 | return VN_INACTIVE_CACHE; |
| 770 | } |
| 771 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 772 | /* |
| 773 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match |
| 774 | * is allowed, otherwise it has to be an exact match. If a CI match is found, |
| 775 | * ci_name->name will point to a the actual name (caller must free) or |
| 776 | * will be set to NULL if an exact match is found. |
| 777 | */ |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 778 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | xfs_lookup( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 780 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 781 | struct xfs_name *name, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 782 | xfs_inode_t **ipp, |
| 783 | struct xfs_name *ci_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | { |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 785 | xfs_ino_t inum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | int error; |
| 787 | uint lock_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 789 | trace_xfs_lookup(dp, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 792 | return XFS_ERROR(EIO); |
| 793 | |
| 794 | lock_mode = xfs_ilock_map_shared(dp); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 795 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | xfs_iunlock_map_shared(dp, lock_mode); |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 797 | |
| 798 | if (error) |
| 799 | goto out; |
| 800 | |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 801 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 802 | if (error) |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 803 | goto out_free_name; |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 804 | |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 805 | return 0; |
| 806 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 807 | out_free_name: |
| 808 | if (ci_name) |
| 809 | kmem_free(ci_name->name); |
| 810 | out: |
Christoph Hellwig | eca450b | 2008-04-22 17:33:52 +1000 | [diff] [blame] | 811 | *ipp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | return error; |
| 813 | } |
| 814 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 815 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | xfs_create( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 817 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 818 | struct xfs_name *name, |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 819 | mode_t mode, |
| 820 | xfs_dev_t rdev, |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 821 | xfs_inode_t **ipp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | { |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 823 | int is_dir = S_ISDIR(mode); |
| 824 | struct xfs_mount *mp = dp->i_mount; |
| 825 | struct xfs_inode *ip = NULL; |
| 826 | struct xfs_trans *tp = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 827 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | xfs_bmap_free_t free_list; |
| 829 | xfs_fsblock_t first_block; |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 830 | boolean_t unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | uint cancel_flags; |
| 832 | int committed; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 833 | prid_t prid; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 834 | struct xfs_dquot *udqp = NULL; |
| 835 | struct xfs_dquot *gdqp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | uint resblks; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 837 | uint log_res; |
| 838 | uint log_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 840 | trace_xfs_create(dp, name); |
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 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 843 | return XFS_ERROR(EIO); |
| 844 | |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 845 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 846 | prid = xfs_get_projid(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | else |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 848 | prid = XFS_PROJID_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | /* |
| 851 | * Make sure that we have allocated dquot(s) on disk. |
| 852 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 853 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 854 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 856 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 858 | if (is_dir) { |
| 859 | rdev = 0; |
| 860 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); |
| 861 | log_res = XFS_MKDIR_LOG_RES(mp); |
| 862 | log_count = XFS_MKDIR_LOG_COUNT; |
| 863 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); |
| 864 | } else { |
| 865 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); |
| 866 | log_res = XFS_CREATE_LOG_RES(mp); |
| 867 | log_count = XFS_CREATE_LOG_COUNT; |
| 868 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); |
| 869 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | /* |
| 874 | * Initially assume that the file does not exist and |
| 875 | * reserve the resources for that case. If that is not |
| 876 | * the case we'll drop the one we have and get a more |
| 877 | * appropriate transaction later. |
| 878 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 879 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
| 880 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | if (error == ENOSPC) { |
Dave Chinner | 153fec4 | 2009-04-06 18:48:30 +0200 | [diff] [blame] | 882 | /* flush outstanding delalloc blocks and retry */ |
| 883 | xfs_flush_inodes(dp); |
Christoph Hellwig | 4734d40 | 2009-09-09 18:19:02 -0500 | [diff] [blame] | 884 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
| 885 | XFS_TRANS_PERM_LOG_RES, log_count); |
Dave Chinner | 153fec4 | 2009-04-06 18:48:30 +0200 | [diff] [blame] | 886 | } |
| 887 | if (error == ENOSPC) { |
| 888 | /* No space at all so try a "no-allocation" reservation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | resblks = 0; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 890 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
| 891 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | } |
| 893 | if (error) { |
| 894 | cancel_flags = 0; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 895 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 898 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 899 | unlock_dp_on_error = B_TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 901 | /* |
| 902 | * Check for directory link count overflow. |
| 903 | */ |
| 904 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { |
| 905 | error = XFS_ERROR(EMLINK); |
| 906 | goto out_trans_cancel; |
| 907 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 909 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
| 911 | /* |
| 912 | * Reserve disk quota and the inode. |
| 913 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 914 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | if (error) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 916 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 918 | error = xfs_dir_canenter(tp, dp, name, resblks); |
| 919 | if (error) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 920 | goto out_trans_cancel; |
| 921 | |
| 922 | /* |
| 923 | * A newly created regular or special file just has one directory |
| 924 | * entry pointing to them, but a directory also the "." entry |
| 925 | * pointing to itself. |
| 926 | */ |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 927 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 928 | prid, resblks > 0, &ip, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | if (error) { |
| 930 | if (error == ENOSPC) |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 931 | goto out_trans_cancel; |
| 932 | goto out_trans_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
| 935 | /* |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 936 | * Now we join the directory inode to the transaction. We do not do it |
| 937 | * earlier because xfs_dir_ialloc might commit the previous transaction |
| 938 | * (and release all the locks). An error from here on will result in |
| 939 | * the transaction cancel unlocking dp so don't do it explicitly in the |
| 940 | * error path. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 942 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 943 | unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 945 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 946 | &first_block, &free_list, resblks ? |
| 947 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (error) { |
| 949 | ASSERT(error != ENOSPC); |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 950 | goto out_trans_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 952 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 954 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 955 | if (is_dir) { |
| 956 | error = xfs_dir_init(tp, ip, dp); |
| 957 | if (error) |
| 958 | goto out_bmap_cancel; |
| 959 | |
| 960 | error = xfs_bumplink(tp, dp); |
| 961 | if (error) |
| 962 | goto out_bmap_cancel; |
| 963 | } |
| 964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | /* |
| 966 | * If this is a synchronous mount, make sure that the |
| 967 | * create transaction goes to disk before returning to |
| 968 | * the user. |
| 969 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 970 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | /* |
| 974 | * Attach the dquot(s) to the inodes and modify them incore. |
| 975 | * These ids of the inode couldn't have changed since the new |
| 976 | * inode has been locked ever since it was created. |
| 977 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 978 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 980 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 981 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 982 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 984 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 985 | if (error) |
| 986 | goto out_release_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 988 | xfs_qm_dqrele(udqp); |
| 989 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 991 | *ipp = ip; |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 992 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 994 | out_bmap_cancel: |
| 995 | xfs_bmap_cancel(&free_list); |
| 996 | out_trans_abort: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | cancel_flags |= XFS_TRANS_ABORT; |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 998 | out_trans_cancel: |
| 999 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1000 | out_release_inode: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | /* |
| 1002 | * Wait until after the current transaction is aborted to |
| 1003 | * release the inode. This prevents recursive transactions |
| 1004 | * and deadlocks from xfs_inactive. |
| 1005 | */ |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1006 | if (ip) |
| 1007 | IRELE(ip); |
| 1008 | |
| 1009 | xfs_qm_dqrele(udqp); |
| 1010 | xfs_qm_dqrele(gdqp); |
| 1011 | |
| 1012 | if (unlock_dp_on_error) |
| 1013 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 1014 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | #ifdef DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | int xfs_locked_n; |
| 1019 | int xfs_small_retries; |
| 1020 | int xfs_middle_retries; |
| 1021 | int xfs_lots_retries; |
| 1022 | int xfs_lock_delays; |
| 1023 | #endif |
| 1024 | |
| 1025 | /* |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1026 | * Bump the subclass so xfs_lock_inodes() acquires each lock with |
| 1027 | * a different value |
| 1028 | */ |
| 1029 | static inline int |
| 1030 | xfs_lock_inumorder(int lock_mode, int subclass) |
| 1031 | { |
| 1032 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 1033 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1034 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
David Chinner | 0f1145c | 2007-06-29 17:26:09 +1000 | [diff] [blame] | 1035 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1036 | |
| 1037 | return lock_mode; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | * The following routine will lock n inodes in exclusive mode. |
| 1042 | * We assume the caller calls us with the inodes in i_ino order. |
| 1043 | * |
| 1044 | * We need to detect deadlock where an inode that we lock |
| 1045 | * is in the AIL and we start waiting for another inode that is locked |
| 1046 | * by a thread in a long running transaction (such as truncate). This can |
| 1047 | * result in deadlock since the long running trans might need to wait |
| 1048 | * for the inode we just locked in order to push the tail and free space |
| 1049 | * in the log. |
| 1050 | */ |
| 1051 | void |
| 1052 | xfs_lock_inodes( |
| 1053 | xfs_inode_t **ips, |
| 1054 | int inodes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | uint lock_mode) |
| 1056 | { |
| 1057 | int attempts = 0, i, j, try_lock; |
| 1058 | xfs_log_item_t *lp; |
| 1059 | |
| 1060 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ |
| 1061 | |
Christoph Hellwig | cfa853e | 2008-04-22 17:34:06 +1000 | [diff] [blame] | 1062 | try_lock = 0; |
| 1063 | i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | |
| 1065 | again: |
| 1066 | for (; i < inodes; i++) { |
| 1067 | ASSERT(ips[i]); |
| 1068 | |
| 1069 | if (i && (ips[i] == ips[i-1])) /* Already locked */ |
| 1070 | continue; |
| 1071 | |
| 1072 | /* |
| 1073 | * If try_lock is not set yet, make sure all locked inodes |
| 1074 | * are not in the AIL. |
| 1075 | * If any are, set try_lock to be used later. |
| 1076 | */ |
| 1077 | |
| 1078 | if (!try_lock) { |
| 1079 | for (j = (i - 1); j >= 0 && !try_lock; j--) { |
| 1080 | lp = (xfs_log_item_t *)ips[j]->i_itemp; |
| 1081 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 1082 | try_lock++; |
| 1083 | } |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | /* |
| 1088 | * If any of the previous locks we have locked is in the AIL, |
| 1089 | * we must TRY to get the second and subsequent locks. If |
| 1090 | * we can't get any, we must release all we have |
| 1091 | * and try again. |
| 1092 | */ |
| 1093 | |
| 1094 | if (try_lock) { |
| 1095 | /* try_lock must be 0 if i is 0. */ |
| 1096 | /* |
| 1097 | * try_lock means we have an inode locked |
| 1098 | * that is in the AIL. |
| 1099 | */ |
| 1100 | ASSERT(i != 0); |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1101 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | attempts++; |
| 1103 | |
| 1104 | /* |
| 1105 | * Unlock all previous guys and try again. |
| 1106 | * xfs_iunlock will try to push the tail |
| 1107 | * if the inode is in the AIL. |
| 1108 | */ |
| 1109 | |
| 1110 | for(j = i - 1; j >= 0; j--) { |
| 1111 | |
| 1112 | /* |
| 1113 | * Check to see if we've already |
| 1114 | * unlocked this one. |
| 1115 | * Not the first one going back, |
| 1116 | * and the inode ptr is the same. |
| 1117 | */ |
| 1118 | if ((j != (i - 1)) && ips[j] == |
| 1119 | ips[j+1]) |
| 1120 | continue; |
| 1121 | |
| 1122 | xfs_iunlock(ips[j], lock_mode); |
| 1123 | } |
| 1124 | |
| 1125 | if ((attempts % 5) == 0) { |
| 1126 | delay(1); /* Don't just spin the CPU */ |
| 1127 | #ifdef DEBUG |
| 1128 | xfs_lock_delays++; |
| 1129 | #endif |
| 1130 | } |
| 1131 | i = 0; |
| 1132 | try_lock = 0; |
| 1133 | goto again; |
| 1134 | } |
| 1135 | } else { |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1136 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | #ifdef DEBUG |
| 1141 | if (attempts) { |
| 1142 | if (attempts < 5) xfs_small_retries++; |
| 1143 | else if (attempts < 100) xfs_middle_retries++; |
| 1144 | else xfs_lots_retries++; |
| 1145 | } else { |
| 1146 | xfs_locked_n++; |
| 1147 | } |
| 1148 | #endif |
| 1149 | } |
| 1150 | |
David Chinner | f9114eb | 2008-09-17 16:51:21 +1000 | [diff] [blame] | 1151 | /* |
| 1152 | * xfs_lock_two_inodes() can only be used to lock one type of lock |
| 1153 | * at a time - the iolock or the ilock, but not both at once. If |
| 1154 | * we lock both at once, lockdep will report false positives saying |
| 1155 | * we have violated locking orders. |
| 1156 | */ |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1157 | void |
| 1158 | xfs_lock_two_inodes( |
| 1159 | xfs_inode_t *ip0, |
| 1160 | xfs_inode_t *ip1, |
| 1161 | uint lock_mode) |
| 1162 | { |
| 1163 | xfs_inode_t *temp; |
| 1164 | int attempts = 0; |
| 1165 | xfs_log_item_t *lp; |
| 1166 | |
David Chinner | f9114eb | 2008-09-17 16:51:21 +1000 | [diff] [blame] | 1167 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
| 1168 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1169 | ASSERT(ip0->i_ino != ip1->i_ino); |
| 1170 | |
| 1171 | if (ip0->i_ino > ip1->i_ino) { |
| 1172 | temp = ip0; |
| 1173 | ip0 = ip1; |
| 1174 | ip1 = temp; |
| 1175 | } |
| 1176 | |
| 1177 | again: |
| 1178 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); |
| 1179 | |
| 1180 | /* |
| 1181 | * If the first lock we have locked is in the AIL, we must TRY to get |
| 1182 | * the second lock. If we can't get it, we must release the first one |
| 1183 | * and try again. |
| 1184 | */ |
| 1185 | lp = (xfs_log_item_t *)ip0->i_itemp; |
| 1186 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 1187 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { |
| 1188 | xfs_iunlock(ip0, lock_mode); |
| 1189 | if ((++attempts % 5) == 0) |
| 1190 | delay(1); /* Don't just spin the CPU */ |
| 1191 | goto again; |
| 1192 | } |
| 1193 | } else { |
| 1194 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); |
| 1195 | } |
| 1196 | } |
| 1197 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1198 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | xfs_remove( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1200 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1201 | struct xfs_name *name, |
| 1202 | xfs_inode_t *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1204 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | xfs_trans_t *tp = NULL; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1206 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | int error = 0; |
| 1208 | xfs_bmap_free_t free_list; |
| 1209 | xfs_fsblock_t first_block; |
| 1210 | int cancel_flags; |
| 1211 | int committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | int link_zero; |
| 1213 | uint resblks; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1214 | uint log_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1216 | trace_xfs_remove(dp, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1219 | return XFS_ERROR(EIO); |
| 1220 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1221 | error = xfs_qm_dqattach(dp, 0); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1222 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | goto std_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1225 | error = xfs_qm_dqattach(ip, 0); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1226 | if (error) |
| 1227 | goto std_return; |
| 1228 | |
| 1229 | if (is_dir) { |
| 1230 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); |
| 1231 | log_count = XFS_DEFAULT_LOG_COUNT; |
| 1232 | } else { |
| 1233 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); |
| 1234 | log_count = XFS_REMOVE_LOG_COUNT; |
| 1235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | /* |
| 1239 | * We try to get the real space reservation first, |
| 1240 | * allowing for directory btree deletion(s) implying |
| 1241 | * possible bmap insert(s). If we can't get the space |
| 1242 | * reservation then we use 0 instead, and avoid the bmap |
| 1243 | * btree insert(s) in the directory code by, if the bmap |
| 1244 | * insert tries to happen, instead trimming the LAST |
| 1245 | * block from the directory. |
| 1246 | */ |
| 1247 | resblks = XFS_REMOVE_SPACE_RES(mp); |
| 1248 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1249 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | if (error == ENOSPC) { |
| 1251 | resblks = 0; |
| 1252 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1253 | XFS_TRANS_PERM_LOG_RES, log_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | } |
| 1255 | if (error) { |
| 1256 | ASSERT(error != ENOSPC); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1257 | cancel_flags = 0; |
| 1258 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | } |
| 1260 | |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1261 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1263 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
| 1264 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | /* |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1267 | * If we're removing a directory perform some additional validation. |
| 1268 | */ |
| 1269 | if (is_dir) { |
| 1270 | ASSERT(ip->i_d.di_nlink >= 2); |
| 1271 | if (ip->i_d.di_nlink != 2) { |
| 1272 | error = XFS_ERROR(ENOTEMPTY); |
| 1273 | goto out_trans_cancel; |
| 1274 | } |
| 1275 | if (!xfs_dir_isempty(ip)) { |
| 1276 | error = XFS_ERROR(ENOTEMPTY); |
| 1277 | goto out_trans_cancel; |
| 1278 | } |
| 1279 | } |
| 1280 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1281 | xfs_bmap_init(&free_list, &first_block); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1282 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
Christoph Hellwig | d4377d8 | 2008-04-22 17:33:46 +1000 | [diff] [blame] | 1283 | &first_block, &free_list, resblks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | if (error) { |
| 1285 | ASSERT(error != ENOENT); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1286 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | } |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1288 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1290 | if (is_dir) { |
| 1291 | /* |
| 1292 | * Drop the link from ip's "..". |
| 1293 | */ |
| 1294 | error = xfs_droplink(tp, dp); |
| 1295 | if (error) |
| 1296 | goto out_bmap_cancel; |
| 1297 | |
| 1298 | /* |
Christoph Hellwig | 2b7035f | 2008-10-30 17:55:18 +1100 | [diff] [blame] | 1299 | * Drop the "." link from ip to self. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1300 | */ |
| 1301 | error = xfs_droplink(tp, ip); |
| 1302 | if (error) |
| 1303 | goto out_bmap_cancel; |
| 1304 | } else { |
| 1305 | /* |
| 1306 | * When removing a non-directory we need to log the parent |
Dave Chinner | 26c5295 | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1307 | * inode here. For a directory this is done implicitly |
| 1308 | * by the xfs_droplink call for the ".." entry. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1309 | */ |
| 1310 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | } |
| 1312 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1313 | /* |
Christoph Hellwig | 2b7035f | 2008-10-30 17:55:18 +1100 | [diff] [blame] | 1314 | * Drop the link from dp to ip. |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1315 | */ |
| 1316 | error = xfs_droplink(tp, ip); |
| 1317 | if (error) |
| 1318 | goto out_bmap_cancel; |
| 1319 | |
| 1320 | /* |
| 1321 | * Determine if this is the last link while |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | * we are in the transaction. |
| 1323 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1324 | link_zero = (ip->i_d.di_nlink == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | |
| 1326 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | * If this is a synchronous mount, make sure that the |
| 1328 | * remove transaction goes to disk before returning to |
| 1329 | * the user. |
| 1330 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1331 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1334 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1335 | if (error) |
| 1336 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1338 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | 5df78e7 | 2008-04-22 17:34:24 +1000 | [diff] [blame] | 1339 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | goto std_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
| 1342 | /* |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1343 | * If we are using filestreams, kill the stream association. |
| 1344 | * If the file is still open it may get a new one but that |
| 1345 | * will get killed on last close in xfs_close() so we don't |
| 1346 | * have to worry about that. |
| 1347 | */ |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1348 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1349 | xfs_filestream_deassociate(ip); |
| 1350 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1351 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1353 | out_bmap_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | xfs_bmap_cancel(&free_list); |
| 1355 | cancel_flags |= XFS_TRANS_ABORT; |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1356 | out_trans_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1358 | std_return: |
| 1359 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
| 1361 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1362 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | xfs_link( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1364 | xfs_inode_t *tdp, |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 1365 | xfs_inode_t *sip, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1366 | struct xfs_name *target_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1368 | xfs_mount_t *mp = tdp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | int error; |
| 1371 | xfs_bmap_free_t free_list; |
| 1372 | xfs_fsblock_t first_block; |
| 1373 | int cancel_flags; |
| 1374 | int committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | int resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1377 | trace_xfs_link(tdp, target_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 1379 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1382 | return XFS_ERROR(EIO); |
| 1383 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1384 | error = xfs_qm_dqattach(sip, 0); |
Christoph Hellwig | cb3f35b | 2009-02-04 09:34:20 +0100 | [diff] [blame] | 1385 | if (error) |
| 1386 | goto std_return; |
| 1387 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1388 | error = xfs_qm_dqattach(tdp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | if (error) |
| 1390 | goto std_return; |
| 1391 | |
| 1392 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); |
| 1393 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1394 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
| 1396 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 1397 | if (error == ENOSPC) { |
| 1398 | resblks = 0; |
| 1399 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, |
| 1400 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 1401 | } |
| 1402 | if (error) { |
| 1403 | cancel_flags = 0; |
| 1404 | goto error_return; |
| 1405 | } |
| 1406 | |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 1407 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1409 | xfs_trans_ijoin_ref(tp, sip, XFS_ILOCK_EXCL); |
| 1410 | xfs_trans_ijoin_ref(tp, tdp, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | |
| 1412 | /* |
| 1413 | * If the source has too many links, we can't make any more to it. |
| 1414 | */ |
| 1415 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { |
| 1416 | error = XFS_ERROR(EMLINK); |
| 1417 | goto error_return; |
| 1418 | } |
| 1419 | |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1420 | /* |
| 1421 | * If we are using project inheritance, we only allow hard link |
| 1422 | * creation in our tree when the project IDs are the same; else |
| 1423 | * the tree quota mechanism could be circumvented. |
| 1424 | */ |
| 1425 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1426 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
Nathan Scott | b1ecdda | 2006-05-08 19:51:42 +1000 | [diff] [blame] | 1427 | error = XFS_ERROR(EXDEV); |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1428 | goto error_return; |
| 1429 | } |
| 1430 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1431 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
| 1432 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | goto error_return; |
| 1434 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1435 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1437 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
| 1438 | &first_block, &free_list, resblks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | if (error) |
| 1440 | goto abort_return; |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1441 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
| 1443 | |
| 1444 | error = xfs_bumplink(tp, sip); |
Alexey Dobriyan | b71d300 | 2006-06-27 12:45:17 +1000 | [diff] [blame] | 1445 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | goto abort_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
| 1448 | /* |
| 1449 | * If this is a synchronous mount, make sure that the |
| 1450 | * link transaction goes to disk before returning to |
| 1451 | * the user. |
| 1452 | */ |
| 1453 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 1454 | xfs_trans_set_sync(tp); |
| 1455 | } |
| 1456 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1457 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | if (error) { |
| 1459 | xfs_bmap_cancel(&free_list); |
| 1460 | goto abort_return; |
| 1461 | } |
| 1462 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1463 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
| 1465 | abort_return: |
| 1466 | cancel_flags |= XFS_TRANS_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | error_return: |
| 1468 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1469 | std_return: |
| 1470 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | } |
Alexey Dobriyan | b71d300 | 2006-06-27 12:45:17 +1000 | [diff] [blame] | 1472 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1473 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | xfs_symlink( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1475 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1476 | struct xfs_name *link_name, |
| 1477 | const char *target_path, |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 1478 | mode_t mode, |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 1479 | xfs_inode_t **ipp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1481 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | xfs_inode_t *ip; |
| 1484 | int error; |
| 1485 | int pathlen; |
| 1486 | xfs_bmap_free_t free_list; |
| 1487 | xfs_fsblock_t first_block; |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1488 | boolean_t unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | uint cancel_flags; |
| 1490 | int committed; |
| 1491 | xfs_fileoff_t first_fsb; |
| 1492 | xfs_filblks_t fs_blocks; |
| 1493 | int nmaps; |
| 1494 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 1495 | xfs_daddr_t d; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1496 | const char *cur_chunk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | int byte_cnt; |
| 1498 | int n; |
| 1499 | xfs_buf_t *bp; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1500 | prid_t prid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | struct xfs_dquot *udqp, *gdqp; |
| 1502 | uint resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 1504 | *ipp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | error = 0; |
| 1506 | ip = NULL; |
| 1507 | tp = NULL; |
| 1508 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1509 | trace_xfs_symlink(dp, link_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
| 1511 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1512 | return XFS_ERROR(EIO); |
| 1513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | /* |
| 1515 | * Check component lengths of the target path name. |
| 1516 | */ |
| 1517 | pathlen = strlen(target_path); |
| 1518 | if (pathlen >= MAXPATHLEN) /* total string too long */ |
| 1519 | return XFS_ERROR(ENAMETOOLONG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | udqp = gdqp = NULL; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1522 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1523 | prid = xfs_get_projid(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | else |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1525 | prid = XFS_PROJID_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
| 1527 | /* |
| 1528 | * Make sure that we have allocated dquot(s) on disk. |
| 1529 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1530 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| 1532 | if (error) |
| 1533 | goto std_return; |
| 1534 | |
| 1535 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); |
| 1536 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 1537 | /* |
| 1538 | * The symlink will fit into the inode data fork? |
| 1539 | * There can't be any attributes so we get the whole variable part. |
| 1540 | */ |
| 1541 | if (pathlen <= XFS_LITINO(mp)) |
| 1542 | fs_blocks = 0; |
| 1543 | else |
| 1544 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1545 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
| 1547 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 1548 | if (error == ENOSPC && fs_blocks == 0) { |
| 1549 | resblks = 0; |
| 1550 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, |
| 1551 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 1552 | } |
| 1553 | if (error) { |
| 1554 | cancel_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | goto error_return; |
| 1556 | } |
| 1557 | |
Lachlan McIlroy | f7c66ce | 2007-05-08 13:50:19 +1000 | [diff] [blame] | 1558 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1559 | unlock_dp_on_error = B_TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | |
| 1561 | /* |
| 1562 | * Check whether the directory allows new symlinks or not. |
| 1563 | */ |
| 1564 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { |
| 1565 | error = XFS_ERROR(EPERM); |
| 1566 | goto error_return; |
| 1567 | } |
| 1568 | |
| 1569 | /* |
| 1570 | * Reserve disk quota : blocks and inode. |
| 1571 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1572 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | if (error) |
| 1574 | goto error_return; |
| 1575 | |
| 1576 | /* |
| 1577 | * Check for ability to enter directory entry, if no space reserved. |
| 1578 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1579 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
| 1580 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | goto error_return; |
| 1582 | /* |
| 1583 | * Initialize the bmap freelist prior to calling either |
| 1584 | * bmapi or the directory create code. |
| 1585 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1586 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | |
| 1588 | /* |
| 1589 | * Allocate an inode for the symlink. |
| 1590 | */ |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 1591 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
| 1592 | prid, resblks > 0, &ip, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | if (error) { |
| 1594 | if (error == ENOSPC) |
| 1595 | goto error_return; |
| 1596 | goto error1; |
| 1597 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1599 | /* |
| 1600 | * An error after we've joined dp to the transaction will result in the |
| 1601 | * transaction cancel unlocking dp so don't do it explicitly in the |
| 1602 | * error path. |
| 1603 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1604 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1605 | unlock_dp_on_error = B_FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
| 1607 | /* |
| 1608 | * Also attach the dquot(s) to it, if applicable. |
| 1609 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1610 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
| 1612 | if (resblks) |
| 1613 | resblks -= XFS_IALLOC_SPACE_RES(mp); |
| 1614 | /* |
| 1615 | * If the symlink will fit into the inode, write it inline. |
| 1616 | */ |
| 1617 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { |
| 1618 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); |
| 1619 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); |
| 1620 | ip->i_d.di_size = pathlen; |
| 1621 | |
| 1622 | /* |
| 1623 | * The inode was initially created in extent format. |
| 1624 | */ |
| 1625 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); |
| 1626 | ip->i_df.if_flags |= XFS_IFINLINE; |
| 1627 | |
| 1628 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
| 1629 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
| 1630 | |
| 1631 | } else { |
| 1632 | first_fsb = 0; |
| 1633 | nmaps = SYMLINK_MAPS; |
| 1634 | |
| 1635 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, |
| 1636 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, |
| 1637 | &first_block, resblks, mval, &nmaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1638 | &free_list); |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1639 | if (error) |
| 1640 | goto error2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | |
| 1642 | if (resblks) |
| 1643 | resblks -= fs_blocks; |
| 1644 | ip->i_d.di_size = pathlen; |
| 1645 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1646 | |
| 1647 | cur_chunk = target_path; |
| 1648 | for (n = 0; n < nmaps; n++) { |
| 1649 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| 1650 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| 1651 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
| 1652 | BTOBB(byte_cnt), 0); |
Chandra Seetharaman | 5a52c2a58 | 2011-07-22 23:39:51 +0000 | [diff] [blame] | 1653 | ASSERT(!xfs_buf_geterror(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | if (pathlen < byte_cnt) { |
| 1655 | byte_cnt = pathlen; |
| 1656 | } |
| 1657 | pathlen -= byte_cnt; |
| 1658 | |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 1659 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | cur_chunk += byte_cnt; |
| 1661 | |
| 1662 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | /* |
| 1667 | * Create the directory entry for the symlink. |
| 1668 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 1669 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
| 1670 | &first_block, &free_list, resblks); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1671 | if (error) |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1672 | goto error2; |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 1673 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 1675 | |
| 1676 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | * If this is a synchronous mount, make sure that the |
| 1678 | * symlink transaction goes to disk before returning to |
| 1679 | * the user. |
| 1680 | */ |
| 1681 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 1682 | xfs_trans_set_sync(tp); |
| 1683 | } |
| 1684 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1685 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | if (error) { |
| 1687 | goto error2; |
| 1688 | } |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1689 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1690 | xfs_qm_dqrele(udqp); |
| 1691 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1693 | *ipp = ip; |
| 1694 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | |
| 1696 | error2: |
| 1697 | IRELE(ip); |
| 1698 | error1: |
| 1699 | xfs_bmap_cancel(&free_list); |
| 1700 | cancel_flags |= XFS_TRANS_ABORT; |
| 1701 | error_return: |
| 1702 | xfs_trans_cancel(tp, cancel_flags); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1703 | xfs_qm_dqrele(udqp); |
| 1704 | xfs_qm_dqrele(gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1706 | if (unlock_dp_on_error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1708 | std_return: |
| 1709 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | } |
| 1711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1713 | xfs_set_dmattrs( |
| 1714 | xfs_inode_t *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | u_int evmask, |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1716 | u_int16_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 1718 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | int error; |
| 1721 | |
| 1722 | if (!capable(CAP_SYS_ADMIN)) |
| 1723 | return XFS_ERROR(EPERM); |
| 1724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1726 | return XFS_ERROR(EIO); |
| 1727 | |
| 1728 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); |
| 1729 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); |
| 1730 | if (error) { |
| 1731 | xfs_trans_cancel(tp, 0); |
| 1732 | return error; |
| 1733 | } |
| 1734 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1735 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | |
Christoph Hellwig | 613d704 | 2007-10-11 17:44:08 +1000 | [diff] [blame] | 1737 | ip->i_d.di_dmevmask = evmask; |
| 1738 | ip->i_d.di_dmstate = state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
| 1740 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1741 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
| 1743 | return error; |
| 1744 | } |
| 1745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | /* |
| 1747 | * xfs_alloc_file_space() |
| 1748 | * This routine allocates disk space for the given file. |
| 1749 | * |
| 1750 | * If alloc_type == 0, this request is for an ALLOCSP type |
| 1751 | * request which will change the file size. In this case, no |
| 1752 | * DMAPI event will be generated by the call. A TRUNCATE event |
| 1753 | * will be generated later by xfs_setattr. |
| 1754 | * |
| 1755 | * If alloc_type != 0, this request is for a RESVSP type |
| 1756 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the |
| 1757 | * lower block boundary byte address is less than the file's |
| 1758 | * length. |
| 1759 | * |
| 1760 | * RETURNS: |
| 1761 | * 0 on success |
| 1762 | * errno on error |
| 1763 | * |
| 1764 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1765 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | xfs_alloc_file_space( |
| 1767 | xfs_inode_t *ip, |
| 1768 | xfs_off_t offset, |
| 1769 | xfs_off_t len, |
| 1770 | int alloc_type, |
| 1771 | int attr_flags) |
| 1772 | { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1773 | xfs_mount_t *mp = ip->i_mount; |
| 1774 | xfs_off_t count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | xfs_filblks_t allocated_fsb; |
| 1776 | xfs_filblks_t allocatesize_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1777 | xfs_extlen_t extsz, temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | xfs_fileoff_t startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1779 | xfs_fsblock_t firstfsb; |
| 1780 | int nimaps; |
| 1781 | int bmapi_flag; |
| 1782 | int quota_flag; |
| 1783 | int rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | xfs_trans_t *tp; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1785 | xfs_bmbt_irec_t imaps[1], *imapp; |
| 1786 | xfs_bmap_free_t free_list; |
| 1787 | uint qblocks, resblks, resrtextents; |
| 1788 | int committed; |
| 1789 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 1791 | trace_xfs_alloc_file_space(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | |
| 1793 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1794 | return XFS_ERROR(EIO); |
| 1795 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1796 | error = xfs_qm_dqattach(ip, 0); |
| 1797 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | return error; |
| 1799 | |
| 1800 | if (len <= 0) |
| 1801 | return XFS_ERROR(EINVAL); |
| 1802 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 1803 | rt = XFS_IS_REALTIME_INODE(ip); |
| 1804 | extsz = xfs_get_extsz_hint(ip); |
| 1805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | count = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | imapp = &imaps[0]; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1808 | nimaps = 1; |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 1809 | bmapi_flag = XFS_BMAPI_WRITE | alloc_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1811 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); |
| 1812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1814 | * Allocate file space until done or until there is an error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | while (allocatesize_fsb && !error) { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1817 | xfs_fileoff_t s, e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1819 | /* |
Nathan Scott | 3ddb8fa | 2006-01-11 15:33:02 +1100 | [diff] [blame] | 1820 | * Determine space reservations for data/realtime. |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1821 | */ |
| 1822 | if (unlikely(extsz)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | s = startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1824 | do_div(s, extsz); |
| 1825 | s *= extsz; |
| 1826 | e = startoffset_fsb + allocatesize_fsb; |
| 1827 | if ((temp = do_mod(startoffset_fsb, extsz))) |
| 1828 | e += temp; |
| 1829 | if ((temp = do_mod(e, extsz))) |
| 1830 | e += extsz - temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | } else { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1832 | s = 0; |
| 1833 | e = allocatesize_fsb; |
| 1834 | } |
| 1835 | |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1836 | /* |
| 1837 | * The transaction reservation is limited to a 32-bit block |
| 1838 | * count, hence we need to limit the number of blocks we are |
| 1839 | * trying to reserve to avoid an overflow. We can't allocate |
| 1840 | * more than @nimaps extents, and an extent is limited on disk |
| 1841 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. |
| 1842 | */ |
| 1843 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1844 | if (unlikely(rt)) { |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1845 | resrtextents = qblocks = resblks; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1846 | resrtextents /= mp->m_sb.sb_rextsize; |
| 1847 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 1848 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 1849 | } else { |
| 1850 | resrtextents = 0; |
Dave Chinner | 72656c4 | 2010-09-03 12:19:33 +1000 | [diff] [blame] | 1851 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1852 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | } |
| 1854 | |
| 1855 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1856 | * Allocate and setup the transaction. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | */ |
| 1858 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1859 | error = xfs_trans_reserve(tp, resblks, |
| 1860 | XFS_WRITE_LOG_RES(mp), resrtextents, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | XFS_TRANS_PERM_LOG_RES, |
| 1862 | XFS_WRITE_LOG_COUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1864 | * Check for running out of space |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | */ |
| 1866 | if (error) { |
| 1867 | /* |
| 1868 | * Free the transaction structure. |
| 1869 | */ |
| 1870 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 1871 | xfs_trans_cancel(tp, 0); |
| 1872 | break; |
| 1873 | } |
| 1874 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1875 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
| 1876 | 0, quota_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | if (error) |
| 1878 | goto error1; |
| 1879 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1880 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | |
| 1882 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1883 | * Issue the xfs_bmapi() call to allocate the blocks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1885 | xfs_bmap_init(&free_list, &firstfsb); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 1886 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1887 | allocatesize_fsb, bmapi_flag, |
| 1888 | &firstfsb, 0, imapp, &nimaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1889 | &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | if (error) { |
| 1891 | goto error0; |
| 1892 | } |
| 1893 | |
| 1894 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1895 | * Complete the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1897 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | if (error) { |
| 1899 | goto error0; |
| 1900 | } |
| 1901 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 1902 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1904 | if (error) { |
| 1905 | break; |
| 1906 | } |
| 1907 | |
| 1908 | allocated_fsb = imapp->br_blockcount; |
| 1909 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1910 | if (nimaps == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | error = XFS_ERROR(ENOSPC); |
| 1912 | break; |
| 1913 | } |
| 1914 | |
| 1915 | startoffset_fsb += allocated_fsb; |
| 1916 | allocatesize_fsb -= allocated_fsb; |
| 1917 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | |
| 1919 | return error; |
| 1920 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1921 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | xfs_bmap_cancel(&free_list); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1923 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1924 | |
| 1925 | error1: /* Just cancel transaction */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 1927 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1928 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | } |
| 1930 | |
| 1931 | /* |
| 1932 | * Zero file bytes between startoff and endoff inclusive. |
| 1933 | * The iolock is held exclusive and no blocks are buffered. |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1934 | * |
| 1935 | * This function is used by xfs_free_file_space() to zero |
| 1936 | * partial blocks when the range to free is not block aligned. |
| 1937 | * When unreserving space with boundaries that are not block |
| 1938 | * aligned we round up the start and round down the end |
| 1939 | * boundaries and then use this function to zero the parts of |
| 1940 | * the blocks that got dropped during the rounding. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | */ |
| 1942 | STATIC int |
| 1943 | xfs_zero_remaining_bytes( |
| 1944 | xfs_inode_t *ip, |
| 1945 | xfs_off_t startoff, |
| 1946 | xfs_off_t endoff) |
| 1947 | { |
| 1948 | xfs_bmbt_irec_t imap; |
| 1949 | xfs_fileoff_t offset_fsb; |
| 1950 | xfs_off_t lastoffset; |
| 1951 | xfs_off_t offset; |
| 1952 | xfs_buf_t *bp; |
| 1953 | xfs_mount_t *mp = ip->i_mount; |
| 1954 | int nimap; |
| 1955 | int error = 0; |
| 1956 | |
Lachlan McIlroy | 2fd6f6e | 2008-09-17 16:52:50 +1000 | [diff] [blame] | 1957 | /* |
| 1958 | * Avoid doing I/O beyond eof - it's not necessary |
| 1959 | * since nothing can read beyond eof. The space will |
| 1960 | * be zeroed when the file is extended anyway. |
| 1961 | */ |
| 1962 | if (startoff >= ip->i_size) |
| 1963 | return 0; |
| 1964 | |
| 1965 | if (endoff > ip->i_size) |
| 1966 | endoff = ip->i_size; |
| 1967 | |
Dave Chinner | 686865f | 2010-09-24 20:07:47 +1000 | [diff] [blame] | 1968 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
| 1969 | mp->m_rtdev_targp : mp->m_ddev_targp, |
| 1970 | mp->m_sb.sb_blocksize, XBF_DONT_BLOCK); |
Lachlan McIlroy | c642261 | 2008-12-05 13:16:15 +1100 | [diff] [blame] | 1971 | if (!bp) |
| 1972 | return XFS_ERROR(ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | |
Christoph Hellwig | c8da0fa | 2011-07-08 14:36:25 +0200 | [diff] [blame] | 1974 | xfs_buf_unlock(bp); |
| 1975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
| 1977 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1978 | nimap = 1; |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 1979 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1980 | NULL, 0, &imap, &nimap, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | if (error || nimap < 1) |
| 1982 | break; |
| 1983 | ASSERT(imap.br_blockcount >= 1); |
| 1984 | ASSERT(imap.br_startoff == offset_fsb); |
| 1985 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; |
| 1986 | if (lastoffset > endoff) |
| 1987 | lastoffset = endoff; |
| 1988 | if (imap.br_startblock == HOLESTARTBLOCK) |
| 1989 | continue; |
| 1990 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 1991 | if (imap.br_state == XFS_EXT_UNWRITTEN) |
| 1992 | continue; |
| 1993 | XFS_BUF_UNDONE(bp); |
| 1994 | XFS_BUF_UNWRITE(bp); |
| 1995 | XFS_BUF_READ(bp); |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1996 | 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] | 1997 | xfsbdstrat(mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 1998 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 1999 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
| 2001 | mp, bp, XFS_BUF_ADDR(bp)); |
| 2002 | break; |
| 2003 | } |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 2004 | memset(bp->b_addr + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
| 2006 | 0, lastoffset - offset + 1); |
| 2007 | XFS_BUF_UNDONE(bp); |
| 2008 | XFS_BUF_UNREAD(bp); |
| 2009 | XFS_BUF_WRITE(bp); |
| 2010 | xfsbdstrat(mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2011 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 2012 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
| 2014 | mp, bp, XFS_BUF_ADDR(bp)); |
| 2015 | break; |
| 2016 | } |
| 2017 | } |
| 2018 | xfs_buf_free(bp); |
| 2019 | return error; |
| 2020 | } |
| 2021 | |
| 2022 | /* |
| 2023 | * xfs_free_file_space() |
| 2024 | * This routine frees disk space for the given file. |
| 2025 | * |
| 2026 | * This routine is only called by xfs_change_file_space |
| 2027 | * for an UNRESVSP type call. |
| 2028 | * |
| 2029 | * RETURNS: |
| 2030 | * 0 on success |
| 2031 | * errno on error |
| 2032 | * |
| 2033 | */ |
| 2034 | STATIC int |
| 2035 | xfs_free_file_space( |
| 2036 | xfs_inode_t *ip, |
| 2037 | xfs_off_t offset, |
| 2038 | xfs_off_t len, |
| 2039 | int attr_flags) |
| 2040 | { |
| 2041 | int committed; |
| 2042 | int done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | xfs_fileoff_t endoffset_fsb; |
| 2044 | int error; |
| 2045 | xfs_fsblock_t firstfsb; |
| 2046 | xfs_bmap_free_t free_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | xfs_bmbt_irec_t imap; |
| 2048 | xfs_off_t ioffset; |
| 2049 | xfs_extlen_t mod=0; |
| 2050 | xfs_mount_t *mp; |
| 2051 | int nimap; |
| 2052 | uint resblks; |
Nathan Scott | 673cdf5 | 2006-09-28 10:56:26 +1000 | [diff] [blame] | 2053 | uint rounding; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | int rt; |
| 2055 | xfs_fileoff_t startoffset_fsb; |
| 2056 | xfs_trans_t *tp; |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2057 | int need_iolock = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | mp = ip->i_mount; |
| 2060 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 2061 | trace_xfs_free_file_space(ip); |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2062 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 2063 | error = xfs_qm_dqattach(ip, 0); |
| 2064 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | return error; |
| 2066 | |
| 2067 | error = 0; |
| 2068 | if (len <= 0) /* if nothing being freed */ |
| 2069 | return error; |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 2070 | rt = XFS_IS_REALTIME_INODE(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
Christoph Hellwig | 288699f | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2072 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2074 | if (attr_flags & XFS_ATTR_NOLOCK) |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2075 | need_iolock = 0; |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 2076 | if (need_iolock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 2078 | /* wait for the completion of any pending DIOs */ |
| 2079 | xfs_ioend_wait(ip); |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 2080 | } |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 2081 | |
Tim Shimmin | e6a4b37 | 2007-11-23 16:30:42 +1100 | [diff] [blame] | 2082 | 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] | 2083 | ioffset = offset & ~(rounding - 1); |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2084 | |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 2085 | if (VN_CACHED(VFS_I(ip)) != 0) { |
Tim Shimmin | e6a4b37 | 2007-11-23 16:30:42 +1100 | [diff] [blame] | 2086 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 2087 | if (error) |
| 2088 | goto out_unlock_iolock; |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 2089 | } |
| 2090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | /* |
| 2092 | * Need to zero the stuff we're not freeing, on disk. |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 2093 | * 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] | 2094 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
| 2095 | * will take care of it for us. |
| 2096 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 2097 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | nimap = 1; |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 2099 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2100 | 1, 0, NULL, 0, &imap, &nimap, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | if (error) |
| 2102 | goto out_unlock_iolock; |
| 2103 | ASSERT(nimap == 0 || nimap == 1); |
| 2104 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 2105 | xfs_daddr_t block; |
| 2106 | |
| 2107 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 2108 | block = imap.br_startblock; |
| 2109 | mod = do_div(block, mp->m_sb.sb_rextsize); |
| 2110 | if (mod) |
| 2111 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; |
| 2112 | } |
| 2113 | nimap = 1; |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 2114 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2115 | 1, 0, NULL, 0, &imap, &nimap, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | if (error) |
| 2117 | goto out_unlock_iolock; |
| 2118 | ASSERT(nimap == 0 || nimap == 1); |
| 2119 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 2120 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 2121 | mod++; |
| 2122 | if (mod && (mod != mp->m_sb.sb_rextsize)) |
| 2123 | endoffset_fsb -= mod; |
| 2124 | } |
| 2125 | } |
| 2126 | if ((done = (endoffset_fsb <= startoffset_fsb))) |
| 2127 | /* |
| 2128 | * One contiguous piece to clear |
| 2129 | */ |
| 2130 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); |
| 2131 | else { |
| 2132 | /* |
| 2133 | * Some full blocks, possibly two pieces to clear |
| 2134 | */ |
| 2135 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) |
| 2136 | error = xfs_zero_remaining_bytes(ip, offset, |
| 2137 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); |
| 2138 | if (!error && |
| 2139 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) |
| 2140 | error = xfs_zero_remaining_bytes(ip, |
| 2141 | XFS_FSB_TO_B(mp, endoffset_fsb), |
| 2142 | offset + len - 1); |
| 2143 | } |
| 2144 | |
| 2145 | /* |
| 2146 | * free file space until done or until there is an error |
| 2147 | */ |
| 2148 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 2149 | while (!error && !done) { |
| 2150 | |
| 2151 | /* |
David Chinner | 91ebecc | 2007-07-19 16:28:30 +1000 | [diff] [blame] | 2152 | * allocate and setup the transaction. Allow this |
| 2153 | * transaction to dip into the reserve blocks to ensure |
| 2154 | * the freeing of the space succeeds at ENOSPC. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | */ |
| 2156 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
David Chinner | 91ebecc | 2007-07-19 16:28:30 +1000 | [diff] [blame] | 2157 | tp->t_flags |= XFS_TRANS_RESERVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | error = xfs_trans_reserve(tp, |
| 2159 | resblks, |
| 2160 | XFS_WRITE_LOG_RES(mp), |
| 2161 | 0, |
| 2162 | XFS_TRANS_PERM_LOG_RES, |
| 2163 | XFS_WRITE_LOG_COUNT); |
| 2164 | |
| 2165 | /* |
| 2166 | * check for running out of space |
| 2167 | */ |
| 2168 | if (error) { |
| 2169 | /* |
| 2170 | * Free the transaction structure. |
| 2171 | */ |
| 2172 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 2173 | xfs_trans_cancel(tp, 0); |
| 2174 | break; |
| 2175 | } |
| 2176 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 2177 | error = xfs_trans_reserve_quota(tp, mp, |
| 2178 | ip->i_udquot, ip->i_gdquot, |
| 2179 | resblks, 0, XFS_QMOPT_RES_REGBLKS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | if (error) |
| 2181 | goto error1; |
| 2182 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 2183 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | |
| 2185 | /* |
| 2186 | * issue the bunmapi() call to free the blocks |
| 2187 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2188 | xfs_bmap_init(&free_list, &firstfsb); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 2189 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | endoffset_fsb - startoffset_fsb, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2191 | 0, 2, &firstfsb, &free_list, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | if (error) { |
| 2193 | goto error0; |
| 2194 | } |
| 2195 | |
| 2196 | /* |
| 2197 | * complete the transaction |
| 2198 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2199 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | if (error) { |
| 2201 | goto error0; |
| 2202 | } |
| 2203 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 2204 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2206 | } |
| 2207 | |
| 2208 | out_unlock_iolock: |
| 2209 | if (need_iolock) |
| 2210 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 2211 | return error; |
| 2212 | |
| 2213 | error0: |
| 2214 | xfs_bmap_cancel(&free_list); |
| 2215 | error1: |
| 2216 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 2217 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : |
| 2218 | XFS_ILOCK_EXCL); |
| 2219 | return error; |
| 2220 | } |
| 2221 | |
| 2222 | /* |
| 2223 | * xfs_change_file_space() |
| 2224 | * This routine allocates or frees disk space for the given file. |
| 2225 | * The user specified parameters are checked for alignment and size |
| 2226 | * limitations. |
| 2227 | * |
| 2228 | * RETURNS: |
| 2229 | * 0 on success |
| 2230 | * errno on error |
| 2231 | * |
| 2232 | */ |
| 2233 | int |
| 2234 | xfs_change_file_space( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2235 | xfs_inode_t *ip, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | int cmd, |
| 2237 | xfs_flock64_t *bf, |
| 2238 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | int attr_flags) |
| 2240 | { |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2241 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | int clrprealloc; |
| 2243 | int error; |
| 2244 | xfs_fsize_t fsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | int setprealloc; |
| 2246 | xfs_off_t startoffset; |
| 2247 | xfs_off_t llen; |
| 2248 | xfs_trans_t *tp; |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2249 | struct iattr iattr; |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2250 | int prealloc_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 2252 | if (!S_ISREG(ip->i_d.di_mode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | return XFS_ERROR(EINVAL); |
| 2254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | switch (bf->l_whence) { |
| 2256 | case 0: /*SEEK_SET*/ |
| 2257 | break; |
| 2258 | case 1: /*SEEK_CUR*/ |
| 2259 | bf->l_start += offset; |
| 2260 | break; |
| 2261 | case 2: /*SEEK_END*/ |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 2262 | bf->l_start += ip->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | break; |
| 2264 | default: |
| 2265 | return XFS_ERROR(EINVAL); |
| 2266 | } |
| 2267 | |
| 2268 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; |
| 2269 | |
| 2270 | if ( (bf->l_start < 0) |
| 2271 | || (bf->l_start > XFS_MAXIOFFSET(mp)) |
| 2272 | || (bf->l_start + llen < 0) |
| 2273 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) |
| 2274 | return XFS_ERROR(EINVAL); |
| 2275 | |
| 2276 | bf->l_whence = 0; |
| 2277 | |
| 2278 | startoffset = bf->l_start; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 2279 | fsize = ip->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | |
| 2281 | /* |
| 2282 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve |
| 2283 | * file space. |
| 2284 | * These calls do NOT zero the data space allocated to the file, |
| 2285 | * nor do they change the file size. |
| 2286 | * |
| 2287 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file |
| 2288 | * space. |
| 2289 | * These calls cause the new file data to be zeroed and the file |
| 2290 | * size to be changed. |
| 2291 | */ |
| 2292 | setprealloc = clrprealloc = 0; |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2293 | prealloc_type = XFS_BMAPI_PREALLOC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | |
| 2295 | switch (cmd) { |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2296 | case XFS_IOC_ZERO_RANGE: |
| 2297 | prealloc_type |= XFS_BMAPI_CONVERT; |
| 2298 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); |
| 2299 | /* FALLTHRU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | case XFS_IOC_RESVSP: |
| 2301 | case XFS_IOC_RESVSP64: |
| 2302 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 2303 | prealloc_type, attr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | if (error) |
| 2305 | return error; |
| 2306 | setprealloc = 1; |
| 2307 | break; |
| 2308 | |
| 2309 | case XFS_IOC_UNRESVSP: |
| 2310 | case XFS_IOC_UNRESVSP64: |
| 2311 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, |
| 2312 | attr_flags))) |
| 2313 | return error; |
| 2314 | break; |
| 2315 | |
| 2316 | case XFS_IOC_ALLOCSP: |
| 2317 | case XFS_IOC_ALLOCSP64: |
| 2318 | case XFS_IOC_FREESP: |
| 2319 | case XFS_IOC_FREESP64: |
| 2320 | if (startoffset > fsize) { |
| 2321 | error = xfs_alloc_file_space(ip, fsize, |
| 2322 | startoffset - fsize, 0, attr_flags); |
| 2323 | if (error) |
| 2324 | break; |
| 2325 | } |
| 2326 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2327 | iattr.ia_valid = ATTR_SIZE; |
| 2328 | iattr.ia_size = startoffset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 2330 | error = xfs_setattr_size(ip, &iattr, attr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | |
| 2332 | if (error) |
| 2333 | return error; |
| 2334 | |
| 2335 | clrprealloc = 1; |
| 2336 | break; |
| 2337 | |
| 2338 | default: |
| 2339 | ASSERT(0); |
| 2340 | return XFS_ERROR(EINVAL); |
| 2341 | } |
| 2342 | |
| 2343 | /* |
| 2344 | * update the inode timestamp, mode, and prealloc flag bits |
| 2345 | */ |
| 2346 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); |
| 2347 | |
| 2348 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), |
| 2349 | 0, 0, 0))) { |
| 2350 | /* ASSERT(0); */ |
| 2351 | xfs_trans_cancel(tp, 0); |
| 2352 | return error; |
| 2353 | } |
| 2354 | |
| 2355 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 2356 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 2357 | xfs_trans_ijoin(tp, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 2359 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | ip->i_d.di_mode &= ~S_ISUID; |
| 2361 | |
| 2362 | /* |
| 2363 | * Note that we don't have to worry about mandatory |
| 2364 | * file locking being disabled here because we only |
| 2365 | * clear the S_ISGID bit if the Group execute bit is |
| 2366 | * on, but if it was on then mandatory locking wouldn't |
| 2367 | * have been enabled. |
| 2368 | */ |
| 2369 | if (ip->i_d.di_mode & S_IXGRP) |
| 2370 | ip->i_d.di_mode &= ~S_ISGID; |
| 2371 | |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 2372 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | } |
| 2374 | if (setprealloc) |
| 2375 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; |
| 2376 | else if (clrprealloc) |
| 2377 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; |
| 2378 | |
| 2379 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
Dave Chinner | 8287889 | 2011-03-26 09:13:08 +1100 | [diff] [blame] | 2380 | if (attr_flags & XFS_ATTR_SYNC) |
| 2381 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 2383 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2384 | |
| 2385 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2386 | |
| 2387 | return error; |
| 2388 | } |