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 | |
| 19 | #include <linux/capability.h> |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 26 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_trans.h" |
| 28 | #include "xfs_sb.h" |
| 29 | #include "xfs_ag.h" |
| 30 | #include "xfs_dir.h" |
| 31 | #include "xfs_dir2.h" |
| 32 | #include "xfs_dmapi.h" |
| 33 | #include "xfs_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 36 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_ialloc_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 38 | #include "xfs_dir_sf.h" |
| 39 | #include "xfs_dir2_sf.h" |
| 40 | #include "xfs_attr_sf.h" |
| 41 | #include "xfs_dinode.h" |
| 42 | #include "xfs_inode.h" |
| 43 | #include "xfs_inode_item.h" |
| 44 | #include "xfs_dir_leaf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "xfs_itable.h" |
| 46 | #include "xfs_btree.h" |
| 47 | #include "xfs_ialloc.h" |
| 48 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include "xfs_attr.h" |
| 51 | #include "xfs_rw.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include "xfs_quota.h" |
| 54 | #include "xfs_utils.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 55 | #include "xfs_rtalloc.h" |
| 56 | #include "xfs_refcache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #include "xfs_trans_space.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include "xfs_log_priv.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 59 | #include "xfs_mac.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | |
| 62 | /* |
| 63 | * The maximum pathlen is 1024 bytes. Since the minimum file system |
| 64 | * blocksize is 512 bytes, we can get a max of 2 extents back from |
| 65 | * bmapi. |
| 66 | */ |
| 67 | #define SYMLINK_MAPS 2 |
| 68 | |
| 69 | /* |
| 70 | * For xfs, we check that the file isn't too big to be opened by this kernel. |
| 71 | * No other open action is required for regular files. Devices are handled |
| 72 | * through the specfs file system, pipes through fifofs. Device and |
| 73 | * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively, |
| 74 | * when a new vnode is first looked up or created. |
| 75 | */ |
| 76 | STATIC int |
| 77 | xfs_open( |
| 78 | bhv_desc_t *bdp, |
| 79 | cred_t *credp) |
| 80 | { |
| 81 | int mode; |
| 82 | vnode_t *vp; |
| 83 | xfs_inode_t *ip; |
| 84 | |
| 85 | vp = BHV_TO_VNODE(bdp); |
| 86 | ip = XFS_BHVTOI(bdp); |
| 87 | |
| 88 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 89 | return XFS_ERROR(EIO); |
| 90 | |
| 91 | /* |
| 92 | * If it's a directory with any blocks, read-ahead block 0 |
| 93 | * as we're almost certain to have the next operation be a read there. |
| 94 | */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 95 | if (VN_ISDIR(vp) && ip->i_d.di_nextents > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | mode = xfs_ilock_map_shared(ip); |
| 97 | if (ip->i_d.di_nextents > 0) |
| 98 | (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); |
| 99 | xfs_iunlock(ip, mode); |
| 100 | } |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | |
| 105 | /* |
| 106 | * xfs_getattr |
| 107 | */ |
| 108 | STATIC int |
| 109 | xfs_getattr( |
| 110 | bhv_desc_t *bdp, |
| 111 | vattr_t *vap, |
| 112 | int flags, |
| 113 | cred_t *credp) |
| 114 | { |
| 115 | xfs_inode_t *ip; |
| 116 | xfs_mount_t *mp; |
| 117 | vnode_t *vp; |
| 118 | |
| 119 | vp = BHV_TO_VNODE(bdp); |
| 120 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 121 | |
| 122 | ip = XFS_BHVTOI(bdp); |
| 123 | mp = ip->i_mount; |
| 124 | |
| 125 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 126 | return XFS_ERROR(EIO); |
| 127 | |
| 128 | if (!(flags & ATTR_LAZY)) |
| 129 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 130 | |
| 131 | vap->va_size = ip->i_d.di_size; |
| 132 | if (vap->va_mask == XFS_AT_SIZE) |
| 133 | goto all_done; |
| 134 | |
| 135 | vap->va_nblocks = |
| 136 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 137 | vap->va_nodeid = ip->i_ino; |
| 138 | #if XFS_BIG_INUMS |
| 139 | vap->va_nodeid += mp->m_inoadd; |
| 140 | #endif |
| 141 | vap->va_nlink = ip->i_d.di_nlink; |
| 142 | |
| 143 | /* |
| 144 | * Quick exit for non-stat callers |
| 145 | */ |
| 146 | if ((vap->va_mask & |
| 147 | ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID| |
| 148 | XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0) |
| 149 | goto all_done; |
| 150 | |
| 151 | /* |
| 152 | * Copy from in-core inode. |
| 153 | */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 154 | vap->va_mode = ip->i_d.di_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | vap->va_uid = ip->i_d.di_uid; |
| 156 | vap->va_gid = ip->i_d.di_gid; |
| 157 | vap->va_projid = ip->i_d.di_projid; |
| 158 | |
| 159 | /* |
| 160 | * Check vnode type block/char vs. everything else. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 162 | switch (ip->i_d.di_mode & S_IFMT) { |
| 163 | case S_IFBLK: |
| 164 | case S_IFCHR: |
| 165 | vap->va_rdev = ip->i_df.if_u2.if_rdev; |
| 166 | vap->va_blocksize = BLKDEV_IOSIZE; |
| 167 | break; |
| 168 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | vap->va_rdev = 0; |
| 170 | |
| 171 | if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { |
David Chinner | e8c8b3a | 2005-11-02 10:33:05 +1100 | [diff] [blame] | 172 | vap->va_blocksize = xfs_preferred_iosize(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } else { |
| 174 | |
| 175 | /* |
| 176 | * If the file blocks are being allocated from a |
| 177 | * realtime partition, then return the inode's |
| 178 | * realtime extent size or the realtime volume's |
| 179 | * extent size. |
| 180 | */ |
| 181 | vap->va_blocksize = ip->i_d.di_extsize ? |
| 182 | (ip->i_d.di_extsize << mp->m_sb.sb_blocklog) : |
| 183 | (mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog); |
| 184 | } |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 185 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Nathan Scott | ca5ccbf | 2006-01-11 21:03:04 +1100 | [diff] [blame] | 188 | vn_atime_to_timespec(vp, &vap->va_atime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
| 190 | vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; |
| 191 | vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec; |
| 192 | vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; |
| 193 | |
| 194 | /* |
| 195 | * Exit for stat callers. See if any of the rest of the fields |
| 196 | * to be filled in are needed. |
| 197 | */ |
| 198 | if ((vap->va_mask & |
| 199 | (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| |
| 200 | XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) |
| 201 | goto all_done; |
| 202 | |
| 203 | /* |
| 204 | * Convert di_flags to xflags. |
| 205 | */ |
| 206 | vap->va_xflags = xfs_ip2xflags(ip); |
| 207 | |
| 208 | /* |
| 209 | * Exit for inode revalidate. See if any of the rest of |
| 210 | * the fields to be filled in are needed. |
| 211 | */ |
| 212 | if ((vap->va_mask & |
| 213 | (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| |
| 214 | XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) |
| 215 | goto all_done; |
| 216 | |
| 217 | vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog; |
| 218 | vap->va_nextents = |
| 219 | (ip->i_df.if_flags & XFS_IFEXTENTS) ? |
| 220 | ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) : |
| 221 | ip->i_d.di_nextents; |
| 222 | if (ip->i_afp) |
| 223 | vap->va_anextents = |
| 224 | (ip->i_afp->if_flags & XFS_IFEXTENTS) ? |
| 225 | ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) : |
| 226 | ip->i_d.di_anextents; |
| 227 | else |
| 228 | vap->va_anextents = 0; |
| 229 | vap->va_gen = ip->i_d.di_gen; |
| 230 | |
| 231 | all_done: |
| 232 | if (!(flags & ATTR_LAZY)) |
| 233 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | /* |
| 239 | * xfs_setattr |
| 240 | */ |
| 241 | int |
| 242 | xfs_setattr( |
| 243 | bhv_desc_t *bdp, |
| 244 | vattr_t *vap, |
| 245 | int flags, |
| 246 | cred_t *credp) |
| 247 | { |
| 248 | xfs_inode_t *ip; |
| 249 | xfs_trans_t *tp; |
| 250 | xfs_mount_t *mp; |
| 251 | int mask; |
| 252 | int code; |
| 253 | uint lock_flags; |
| 254 | uint commit_flags=0; |
| 255 | uid_t uid=0, iuid=0; |
| 256 | gid_t gid=0, igid=0; |
| 257 | int timeflags = 0; |
| 258 | vnode_t *vp; |
| 259 | xfs_prid_t projid=0, iprojid=0; |
| 260 | int mandlock_before, mandlock_after; |
| 261 | struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; |
| 262 | int file_owner; |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 263 | int need_iolock = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | vp = BHV_TO_VNODE(bdp); |
| 266 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 267 | |
| 268 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| 269 | return XFS_ERROR(EROFS); |
| 270 | |
| 271 | /* |
| 272 | * Cannot set certain attributes. |
| 273 | */ |
| 274 | mask = vap->va_mask; |
| 275 | if (mask & XFS_AT_NOSET) { |
| 276 | return XFS_ERROR(EINVAL); |
| 277 | } |
| 278 | |
| 279 | ip = XFS_BHVTOI(bdp); |
| 280 | mp = ip->i_mount; |
| 281 | |
| 282 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 283 | return XFS_ERROR(EIO); |
| 284 | |
| 285 | /* |
| 286 | * Timestamps do not need to be logged and hence do not |
| 287 | * need to be done within a transaction. |
| 288 | */ |
| 289 | if (mask & XFS_AT_UPDTIMES) { |
| 290 | ASSERT((mask & ~XFS_AT_UPDTIMES) == 0); |
| 291 | timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) | |
| 292 | ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) | |
| 293 | ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0); |
| 294 | xfs_ichgtime(ip, timeflags); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | olddquot1 = olddquot2 = NULL; |
| 299 | udqp = gdqp = NULL; |
| 300 | |
| 301 | /* |
| 302 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 303 | * before we start any other transactions. Trying to do this later |
| 304 | * is messy. We don't care to take a readlock to look at the ids |
| 305 | * in inode here, because we can't hold it across the trans_reserve. |
| 306 | * If the IDs do change before we take the ilock, we're covered |
| 307 | * because the i_*dquot fields will get updated anyway. |
| 308 | */ |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 309 | if (XFS_IS_QUOTA_ON(mp) && |
| 310 | (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | uint qflags = 0; |
| 312 | |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 313 | if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | uid = vap->va_uid; |
| 315 | qflags |= XFS_QMOPT_UQUOTA; |
| 316 | } else { |
| 317 | uid = ip->i_d.di_uid; |
| 318 | } |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 319 | if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | gid = vap->va_gid; |
| 321 | qflags |= XFS_QMOPT_GQUOTA; |
| 322 | } else { |
| 323 | gid = ip->i_d.di_gid; |
| 324 | } |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 325 | if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) { |
| 326 | projid = vap->va_projid; |
| 327 | qflags |= XFS_QMOPT_PQUOTA; |
| 328 | } else { |
| 329 | projid = ip->i_d.di_projid; |
| 330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | /* |
| 332 | * We take a reference when we initialize udqp and gdqp, |
| 333 | * so it is important that we never blindly double trip on |
| 334 | * the same variable. See xfs_create() for an example. |
| 335 | */ |
| 336 | ASSERT(udqp == NULL); |
| 337 | ASSERT(gdqp == NULL); |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 338 | code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags, |
| 339 | &udqp, &gdqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | if (code) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 341 | return code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | /* |
| 345 | * For the other attributes, we acquire the inode lock and |
| 346 | * first do an error checking pass. |
| 347 | */ |
| 348 | tp = NULL; |
| 349 | lock_flags = XFS_ILOCK_EXCL; |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 350 | if (flags & ATTR_NOLOCK) |
| 351 | need_iolock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (!(mask & XFS_AT_SIZE)) { |
| 353 | if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) || |
| 354 | (mp->m_flags & XFS_MOUNT_WSYNC)) { |
| 355 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| 356 | commit_flags = 0; |
| 357 | if ((code = xfs_trans_reserve(tp, 0, |
| 358 | XFS_ICHANGE_LOG_RES(mp), 0, |
| 359 | 0, 0))) { |
| 360 | lock_flags = 0; |
| 361 | goto error_return; |
| 362 | } |
| 363 | } |
| 364 | } else { |
| 365 | if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) && |
| 366 | !(flags & ATTR_DMI)) { |
| 367 | int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; |
| 368 | code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp, |
| 369 | vap->va_size, 0, dmflags, NULL); |
| 370 | if (code) { |
| 371 | lock_flags = 0; |
| 372 | goto error_return; |
| 373 | } |
| 374 | } |
| 375 | if (need_iolock) |
| 376 | lock_flags |= XFS_IOLOCK_EXCL; |
| 377 | } |
| 378 | |
| 379 | xfs_ilock(ip, lock_flags); |
| 380 | |
| 381 | /* boolean: are we the file owner? */ |
| 382 | file_owner = (current_fsuid(credp) == ip->i_d.di_uid); |
| 383 | |
| 384 | /* |
| 385 | * Change various properties of a file. |
| 386 | * Only the owner or users with CAP_FOWNER |
| 387 | * capability may do these things. |
| 388 | */ |
| 389 | if (mask & |
| 390 | (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID| |
| 391 | XFS_AT_GID|XFS_AT_PROJID)) { |
| 392 | /* |
| 393 | * CAP_FOWNER overrides the following restrictions: |
| 394 | * |
| 395 | * The user ID of the calling process must be equal |
| 396 | * to the file owner ID, except in cases where the |
| 397 | * CAP_FSETID capability is applicable. |
| 398 | */ |
| 399 | if (!file_owner && !capable(CAP_FOWNER)) { |
| 400 | code = XFS_ERROR(EPERM); |
| 401 | goto error_return; |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * CAP_FSETID overrides the following restrictions: |
| 406 | * |
| 407 | * The effective user ID of the calling process shall match |
| 408 | * the file owner when setting the set-user-ID and |
| 409 | * set-group-ID bits on that file. |
| 410 | * |
| 411 | * The effective group ID or one of the supplementary group |
| 412 | * IDs of the calling process shall match the group owner of |
| 413 | * the file when setting the set-group-ID bit on that file |
| 414 | */ |
| 415 | if (mask & XFS_AT_MODE) { |
| 416 | mode_t m = 0; |
| 417 | |
| 418 | if ((vap->va_mode & S_ISUID) && !file_owner) |
| 419 | m |= S_ISUID; |
| 420 | if ((vap->va_mode & S_ISGID) && |
| 421 | !in_group_p((gid_t)ip->i_d.di_gid)) |
| 422 | m |= S_ISGID; |
| 423 | #if 0 |
| 424 | /* Linux allows this, Irix doesn't. */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 425 | if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | m |= S_ISVTX; |
| 427 | #endif |
| 428 | if (m && !capable(CAP_FSETID)) |
| 429 | vap->va_mode &= ~m; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | /* |
| 434 | * Change file ownership. Must be the owner or privileged. |
| 435 | * If the system was configured with the "restricted_chown" |
| 436 | * option, the owner is not permitted to give away the file, |
| 437 | * and can change the group id only to a group of which he |
| 438 | * or she is a member. |
| 439 | */ |
| 440 | if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { |
| 441 | /* |
| 442 | * These IDs could have changed since we last looked at them. |
| 443 | * But, we're assured that if the ownership did change |
| 444 | * while we didn't have the inode locked, inode's dquot(s) |
| 445 | * would have changed also. |
| 446 | */ |
| 447 | iuid = ip->i_d.di_uid; |
| 448 | iprojid = ip->i_d.di_projid; |
| 449 | igid = ip->i_d.di_gid; |
| 450 | gid = (mask & XFS_AT_GID) ? vap->va_gid : igid; |
| 451 | uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid; |
| 452 | projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid : |
| 453 | iprojid; |
| 454 | |
| 455 | /* |
| 456 | * CAP_CHOWN overrides the following restrictions: |
| 457 | * |
| 458 | * If _POSIX_CHOWN_RESTRICTED is defined, this capability |
| 459 | * shall override the restriction that a process cannot |
| 460 | * change the user ID of a file it owns and the restriction |
| 461 | * that the group ID supplied to the chown() function |
| 462 | * shall be equal to either the group ID or one of the |
| 463 | * supplementary group IDs of the calling process. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | */ |
| 465 | if (restricted_chown && |
| 466 | (iuid != uid || (igid != gid && |
| 467 | !in_group_p((gid_t)gid))) && |
| 468 | !capable(CAP_CHOWN)) { |
| 469 | code = XFS_ERROR(EPERM); |
| 470 | goto error_return; |
| 471 | } |
| 472 | /* |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 473 | * Do a quota reservation only if uid/projid/gid is actually |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | * going to change. |
| 475 | */ |
| 476 | if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 477 | (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | (XFS_IS_GQUOTA_ON(mp) && igid != gid)) { |
| 479 | ASSERT(tp); |
| 480 | code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, |
| 481 | capable(CAP_FOWNER) ? |
| 482 | XFS_QMOPT_FORCE_RES : 0); |
| 483 | if (code) /* out of quota */ |
| 484 | goto error_return; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Truncate file. Must have write permission and not be a directory. |
| 490 | */ |
| 491 | if (mask & XFS_AT_SIZE) { |
| 492 | /* Short circuit the truncate case for zero length files */ |
| 493 | if ((vap->va_size == 0) && |
| 494 | (ip->i_d.di_size == 0) && (ip->i_d.di_nextents == 0)) { |
| 495 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 496 | lock_flags &= ~XFS_ILOCK_EXCL; |
| 497 | if (mask & XFS_AT_CTIME) |
| 498 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 499 | code = 0; |
| 500 | goto error_return; |
| 501 | } |
| 502 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 503 | if (VN_ISDIR(vp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | code = XFS_ERROR(EISDIR); |
| 505 | goto error_return; |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 506 | } else if (!VN_ISREG(vp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | code = XFS_ERROR(EINVAL); |
| 508 | goto error_return; |
| 509 | } |
| 510 | /* |
| 511 | * Make sure that the dquots are attached to the inode. |
| 512 | */ |
| 513 | if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED))) |
| 514 | goto error_return; |
| 515 | } |
| 516 | |
| 517 | /* |
| 518 | * Change file access or modified times. |
| 519 | */ |
| 520 | if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { |
| 521 | if (!file_owner) { |
| 522 | if ((flags & ATTR_UTIME) && |
| 523 | !capable(CAP_FOWNER)) { |
| 524 | code = XFS_ERROR(EPERM); |
| 525 | goto error_return; |
| 526 | } |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Change extent size or realtime flag. |
| 532 | */ |
| 533 | if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { |
| 534 | /* |
| 535 | * Can't change extent size if any extents are allocated. |
| 536 | */ |
Eric Sandeen | e94af02 | 2005-11-02 15:10:41 +1100 | [diff] [blame] | 537 | if (ip->i_d.di_nextents && (mask & XFS_AT_EXTSIZE) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
| 539 | vap->va_extsize) ) { |
| 540 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 541 | goto error_return; |
| 542 | } |
| 543 | |
| 544 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | * Can't change realtime flag if any extents are allocated. |
| 546 | */ |
Eric Sandeen | e94af02 | 2005-11-02 15:10:41 +1100 | [diff] [blame] | 547 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| 548 | (mask & XFS_AT_XFLAGS) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != |
| 550 | (vap->va_xflags & XFS_XFLAG_REALTIME)) { |
| 551 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 552 | goto error_return; |
| 553 | } |
| 554 | /* |
| 555 | * Extent size must be a multiple of the appropriate block |
| 556 | * size, if set at all. |
| 557 | */ |
| 558 | if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) { |
| 559 | xfs_extlen_t size; |
| 560 | |
| 561 | if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) || |
| 562 | ((mask & XFS_AT_XFLAGS) && |
| 563 | (vap->va_xflags & XFS_XFLAG_REALTIME))) { |
| 564 | size = mp->m_sb.sb_rextsize << |
| 565 | mp->m_sb.sb_blocklog; |
| 566 | } else { |
| 567 | size = mp->m_sb.sb_blocksize; |
| 568 | } |
| 569 | if (vap->va_extsize % size) { |
| 570 | code = XFS_ERROR(EINVAL); |
| 571 | goto error_return; |
| 572 | } |
| 573 | } |
| 574 | /* |
| 575 | * If realtime flag is set then must have realtime data. |
| 576 | */ |
| 577 | if ((mask & XFS_AT_XFLAGS) && |
| 578 | (vap->va_xflags & XFS_XFLAG_REALTIME)) { |
| 579 | if ((mp->m_sb.sb_rblocks == 0) || |
| 580 | (mp->m_sb.sb_rextsize == 0) || |
| 581 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { |
| 582 | code = XFS_ERROR(EINVAL); |
| 583 | goto error_return; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Can't modify an immutable/append-only file unless |
| 589 | * we have appropriate permission. |
| 590 | */ |
| 591 | if ((mask & XFS_AT_XFLAGS) && |
| 592 | (ip->i_d.di_flags & |
| 593 | (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || |
| 594 | (vap->va_xflags & |
| 595 | (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && |
| 596 | !capable(CAP_LINUX_IMMUTABLE)) { |
| 597 | code = XFS_ERROR(EPERM); |
| 598 | goto error_return; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | /* |
| 603 | * Now we can make the changes. Before we join the inode |
| 604 | * to the transaction, if XFS_AT_SIZE is set then take care of |
| 605 | * the part of the truncation that must be done without the |
| 606 | * inode lock. This needs to be done before joining the inode |
| 607 | * to the transaction, because the inode cannot be unlocked |
| 608 | * once it is a part of the transaction. |
| 609 | */ |
| 610 | if (mask & XFS_AT_SIZE) { |
| 611 | code = 0; |
Eric Sandeen | 374e2ac | 2005-11-02 15:07:34 +1100 | [diff] [blame] | 612 | if ((vap->va_size > ip->i_d.di_size) && |
| 613 | (flags & ATTR_NOSIZETOK) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | code = xfs_igrow_start(ip, vap->va_size, credp); |
Eric Sandeen | 374e2ac | 2005-11-02 15:07:34 +1100 | [diff] [blame] | 615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 617 | vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | if (!code) |
| 619 | code = xfs_itruncate_data(ip, vap->va_size); |
| 620 | if (code) { |
| 621 | ASSERT(tp == NULL); |
| 622 | lock_flags &= ~XFS_ILOCK_EXCL; |
| 623 | ASSERT(lock_flags == XFS_IOLOCK_EXCL); |
| 624 | goto error_return; |
| 625 | } |
| 626 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |
| 627 | if ((code = xfs_trans_reserve(tp, 0, |
| 628 | XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 629 | XFS_TRANS_PERM_LOG_RES, |
| 630 | XFS_ITRUNCATE_LOG_COUNT))) { |
| 631 | xfs_trans_cancel(tp, 0); |
| 632 | if (need_iolock) |
| 633 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 634 | return code; |
| 635 | } |
| 636 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 637 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 638 | } |
| 639 | |
| 640 | if (tp) { |
| 641 | xfs_trans_ijoin(tp, ip, lock_flags); |
| 642 | xfs_trans_ihold(tp, ip); |
| 643 | } |
| 644 | |
| 645 | /* determine whether mandatory locking mode changes */ |
| 646 | mandlock_before = MANDLOCK(vp, ip->i_d.di_mode); |
| 647 | |
| 648 | /* |
| 649 | * Truncate file. Must have write permission and not be a directory. |
| 650 | */ |
| 651 | if (mask & XFS_AT_SIZE) { |
| 652 | if (vap->va_size > ip->i_d.di_size) { |
| 653 | xfs_igrow_finish(tp, ip, vap->va_size, |
| 654 | !(flags & ATTR_DMI)); |
| 655 | } else if ((vap->va_size <= ip->i_d.di_size) || |
| 656 | ((vap->va_size == 0) && ip->i_d.di_nextents)) { |
| 657 | /* |
| 658 | * signal a sync transaction unless |
| 659 | * we're truncating an already unlinked |
| 660 | * file on a wsync filesystem |
| 661 | */ |
| 662 | code = xfs_itruncate_finish(&tp, ip, |
| 663 | (xfs_fsize_t)vap->va_size, |
| 664 | XFS_DATA_FORK, |
| 665 | ((ip->i_d.di_nlink != 0 || |
| 666 | !(mp->m_flags & XFS_MOUNT_WSYNC)) |
| 667 | ? 1 : 0)); |
| 668 | if (code) { |
| 669 | goto abort_return; |
| 670 | } |
| 671 | } |
| 672 | /* |
| 673 | * Have to do this even if the file's size doesn't change. |
| 674 | */ |
| 675 | timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; |
| 676 | } |
| 677 | |
| 678 | /* |
| 679 | * Change file access modes. |
| 680 | */ |
| 681 | if (mask & XFS_AT_MODE) { |
| 682 | ip->i_d.di_mode &= S_IFMT; |
| 683 | ip->i_d.di_mode |= vap->va_mode & ~S_IFMT; |
| 684 | |
| 685 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| 686 | timeflags |= XFS_ICHGTIME_CHG; |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Change file ownership. Must be the owner or privileged. |
| 691 | * If the system was configured with the "restricted_chown" |
| 692 | * option, the owner is not permitted to give away the file, |
| 693 | * and can change the group id only to a group of which he |
| 694 | * or she is a member. |
| 695 | */ |
| 696 | if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { |
| 697 | /* |
| 698 | * CAP_FSETID overrides the following restrictions: |
| 699 | * |
| 700 | * The set-user-ID and set-group-ID bits of a file will be |
| 701 | * cleared upon successful return from chown() |
| 702 | */ |
| 703 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| 704 | !capable(CAP_FSETID)) { |
| 705 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * Change the ownerships and register quota modifications |
| 710 | * in the transaction. |
| 711 | */ |
| 712 | if (iuid != uid) { |
| 713 | if (XFS_IS_UQUOTA_ON(mp)) { |
| 714 | ASSERT(mask & XFS_AT_UID); |
| 715 | ASSERT(udqp); |
| 716 | olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| 717 | &ip->i_udquot, udqp); |
| 718 | } |
| 719 | ip->i_d.di_uid = uid; |
| 720 | } |
| 721 | if (igid != gid) { |
| 722 | if (XFS_IS_GQUOTA_ON(mp)) { |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 723 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | ASSERT(mask & XFS_AT_GID); |
| 725 | ASSERT(gdqp); |
| 726 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| 727 | &ip->i_gdquot, gdqp); |
| 728 | } |
| 729 | ip->i_d.di_gid = gid; |
| 730 | } |
| 731 | if (iprojid != projid) { |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 732 | if (XFS_IS_PQUOTA_ON(mp)) { |
| 733 | ASSERT(!XFS_IS_GQUOTA_ON(mp)); |
| 734 | ASSERT(mask & XFS_AT_PROJID); |
| 735 | ASSERT(gdqp); |
| 736 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| 737 | &ip->i_gdquot, gdqp); |
| 738 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | ip->i_d.di_projid = projid; |
| 740 | /* |
| 741 | * We may have to rev the inode as well as |
| 742 | * the superblock version number since projids didn't |
| 743 | * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. |
| 744 | */ |
| 745 | if (ip->i_d.di_version == XFS_DINODE_VERSION_1) |
| 746 | xfs_bump_ino_vers2(tp, ip); |
| 747 | } |
| 748 | |
| 749 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| 750 | timeflags |= XFS_ICHGTIME_CHG; |
| 751 | } |
| 752 | |
| 753 | |
| 754 | /* |
| 755 | * Change file access or modified times. |
| 756 | */ |
| 757 | if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { |
| 758 | if (mask & XFS_AT_ATIME) { |
| 759 | ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec; |
| 760 | ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec; |
| 761 | ip->i_update_core = 1; |
| 762 | timeflags &= ~XFS_ICHGTIME_ACC; |
| 763 | } |
| 764 | if (mask & XFS_AT_MTIME) { |
| 765 | ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec; |
| 766 | ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec; |
| 767 | timeflags &= ~XFS_ICHGTIME_MOD; |
| 768 | timeflags |= XFS_ICHGTIME_CHG; |
| 769 | } |
| 770 | if (tp && (flags & ATTR_UTIME)) |
| 771 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * Change XFS-added attributes. |
| 776 | */ |
| 777 | if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { |
| 778 | if (mask & XFS_AT_EXTSIZE) { |
| 779 | /* |
| 780 | * Converting bytes to fs blocks. |
| 781 | */ |
| 782 | ip->i_d.di_extsize = vap->va_extsize >> |
| 783 | mp->m_sb.sb_blocklog; |
| 784 | } |
| 785 | if (mask & XFS_AT_XFLAGS) { |
| 786 | uint di_flags; |
| 787 | |
| 788 | /* can't set PREALLOC this way, just preserve it */ |
| 789 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| 790 | if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) |
| 791 | di_flags |= XFS_DIFLAG_IMMUTABLE; |
| 792 | if (vap->va_xflags & XFS_XFLAG_APPEND) |
| 793 | di_flags |= XFS_DIFLAG_APPEND; |
| 794 | if (vap->va_xflags & XFS_XFLAG_SYNC) |
| 795 | di_flags |= XFS_DIFLAG_SYNC; |
| 796 | if (vap->va_xflags & XFS_XFLAG_NOATIME) |
| 797 | di_flags |= XFS_DIFLAG_NOATIME; |
| 798 | if (vap->va_xflags & XFS_XFLAG_NODUMP) |
| 799 | di_flags |= XFS_DIFLAG_NODUMP; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 800 | if (vap->va_xflags & XFS_XFLAG_PROJINHERIT) |
| 801 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| 803 | if (vap->va_xflags & XFS_XFLAG_RTINHERIT) |
| 804 | di_flags |= XFS_DIFLAG_RTINHERIT; |
| 805 | if (vap->va_xflags & XFS_XFLAG_NOSYMLINKS) |
| 806 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 807 | if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT) |
| 808 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| 809 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | if (vap->va_xflags & XFS_XFLAG_REALTIME) { |
| 811 | di_flags |= XFS_DIFLAG_REALTIME; |
| 812 | ip->i_iocore.io_flags |= XFS_IOCORE_RT; |
| 813 | } else { |
| 814 | ip->i_iocore.io_flags &= ~XFS_IOCORE_RT; |
| 815 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 816 | if (vap->va_xflags & XFS_XFLAG_EXTSIZE) |
| 817 | di_flags |= XFS_DIFLAG_EXTSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | } |
| 819 | ip->i_d.di_flags = di_flags; |
| 820 | } |
| 821 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 822 | timeflags |= XFS_ICHGTIME_CHG; |
| 823 | } |
| 824 | |
| 825 | /* |
| 826 | * Change file inode change time only if XFS_AT_CTIME set |
| 827 | * AND we have been called by a DMI function. |
| 828 | */ |
| 829 | |
| 830 | if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) { |
| 831 | ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec; |
| 832 | ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec; |
| 833 | ip->i_update_core = 1; |
| 834 | timeflags &= ~XFS_ICHGTIME_CHG; |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Send out timestamp changes that need to be set to the |
| 839 | * current time. Not done when called by a DMI function. |
| 840 | */ |
| 841 | if (timeflags && !(flags & ATTR_DMI)) |
| 842 | xfs_ichgtime(ip, timeflags); |
| 843 | |
| 844 | XFS_STATS_INC(xs_ig_attrchg); |
| 845 | |
| 846 | /* |
| 847 | * If this is a synchronous mount, make sure that the |
| 848 | * transaction goes to disk before returning to the user. |
| 849 | * This is slightly sub-optimal in that truncates require |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 850 | * two sync transactions instead of one for wsync filesystems. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | * One for the truncate and one for the timestamps since we |
| 852 | * don't want to change the timestamps unless we're sure the |
| 853 | * truncate worked. Truncates are less than 1% of the laddis |
| 854 | * mix so this probably isn't worth the trouble to optimize. |
| 855 | */ |
| 856 | code = 0; |
| 857 | if (tp) { |
| 858 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 859 | xfs_trans_set_sync(tp); |
| 860 | |
| 861 | code = xfs_trans_commit(tp, commit_flags, NULL); |
| 862 | } |
| 863 | |
| 864 | /* |
| 865 | * If the (regular) file's mandatory locking mode changed, then |
| 866 | * notify the vnode. We do this under the inode lock to prevent |
| 867 | * racing calls to vop_vnode_change. |
| 868 | */ |
| 869 | mandlock_after = MANDLOCK(vp, ip->i_d.di_mode); |
| 870 | if (mandlock_before != mandlock_after) { |
| 871 | VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_ENF_LOCKING, |
| 872 | mandlock_after); |
| 873 | } |
| 874 | |
| 875 | xfs_iunlock(ip, lock_flags); |
| 876 | |
| 877 | /* |
| 878 | * Release any dquot(s) the inode had kept before chown. |
| 879 | */ |
| 880 | XFS_QM_DQRELE(mp, olddquot1); |
| 881 | XFS_QM_DQRELE(mp, olddquot2); |
| 882 | XFS_QM_DQRELE(mp, udqp); |
| 883 | XFS_QM_DQRELE(mp, gdqp); |
| 884 | |
| 885 | if (code) { |
| 886 | return code; |
| 887 | } |
| 888 | |
| 889 | if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) && |
| 890 | !(flags & ATTR_DMI)) { |
| 891 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL, |
| 892 | NULL, DM_RIGHT_NULL, NULL, NULL, |
| 893 | 0, 0, AT_DELAY_FLAG(flags)); |
| 894 | } |
| 895 | return 0; |
| 896 | |
| 897 | abort_return: |
| 898 | commit_flags |= XFS_TRANS_ABORT; |
| 899 | /* FALLTHROUGH */ |
| 900 | error_return: |
| 901 | XFS_QM_DQRELE(mp, udqp); |
| 902 | XFS_QM_DQRELE(mp, gdqp); |
| 903 | if (tp) { |
| 904 | xfs_trans_cancel(tp, commit_flags); |
| 905 | } |
| 906 | if (lock_flags != 0) { |
| 907 | xfs_iunlock(ip, lock_flags); |
| 908 | } |
| 909 | return code; |
| 910 | } |
| 911 | |
| 912 | |
| 913 | /* |
| 914 | * xfs_access |
| 915 | * Null conversion from vnode mode bits to inode mode bits, as in efs. |
| 916 | */ |
| 917 | STATIC int |
| 918 | xfs_access( |
| 919 | bhv_desc_t *bdp, |
| 920 | int mode, |
| 921 | cred_t *credp) |
| 922 | { |
| 923 | xfs_inode_t *ip; |
| 924 | int error; |
| 925 | |
| 926 | vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, |
| 927 | (inst_t *)__return_address); |
| 928 | |
| 929 | ip = XFS_BHVTOI(bdp); |
| 930 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 931 | error = xfs_iaccess(ip, mode, credp); |
| 932 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 933 | return error; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | /* |
| 938 | * xfs_readlink |
| 939 | * |
| 940 | */ |
| 941 | STATIC int |
| 942 | xfs_readlink( |
| 943 | bhv_desc_t *bdp, |
| 944 | uio_t *uiop, |
| 945 | int ioflags, |
| 946 | cred_t *credp) |
| 947 | { |
| 948 | xfs_inode_t *ip; |
| 949 | int count; |
| 950 | xfs_off_t offset; |
| 951 | int pathlen; |
| 952 | vnode_t *vp; |
| 953 | int error = 0; |
| 954 | xfs_mount_t *mp; |
| 955 | int nmaps; |
| 956 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 957 | xfs_daddr_t d; |
| 958 | int byte_cnt; |
| 959 | int n; |
| 960 | xfs_buf_t *bp; |
| 961 | |
| 962 | vp = BHV_TO_VNODE(bdp); |
| 963 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 964 | |
| 965 | ip = XFS_BHVTOI(bdp); |
| 966 | mp = ip->i_mount; |
| 967 | |
| 968 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 969 | return XFS_ERROR(EIO); |
| 970 | |
| 971 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 972 | |
| 973 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); |
| 974 | |
| 975 | offset = uiop->uio_offset; |
| 976 | count = uiop->uio_resid; |
| 977 | |
| 978 | if (offset < 0) { |
| 979 | error = XFS_ERROR(EINVAL); |
| 980 | goto error_return; |
| 981 | } |
| 982 | if (count <= 0) { |
| 983 | error = 0; |
| 984 | goto error_return; |
| 985 | } |
| 986 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | /* |
| 988 | * See if the symlink is stored inline. |
| 989 | */ |
| 990 | pathlen = (int)ip->i_d.di_size; |
| 991 | |
| 992 | if (ip->i_df.if_flags & XFS_IFINLINE) { |
| 993 | error = uio_read(ip->i_df.if_u1.if_data, pathlen, uiop); |
| 994 | } |
| 995 | else { |
| 996 | /* |
| 997 | * Symlink not inline. Call bmap to get it in. |
| 998 | */ |
| 999 | nmaps = SYMLINK_MAPS; |
| 1000 | |
| 1001 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1002 | 0, NULL, 0, mval, &nmaps, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | |
| 1004 | if (error) { |
| 1005 | goto error_return; |
| 1006 | } |
| 1007 | |
| 1008 | for (n = 0; n < nmaps; n++) { |
| 1009 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| 1010 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| 1011 | bp = xfs_buf_read(mp->m_ddev_targp, d, |
| 1012 | BTOBB(byte_cnt), 0); |
| 1013 | error = XFS_BUF_GETERROR(bp); |
| 1014 | if (error) { |
| 1015 | xfs_ioerror_alert("xfs_readlink", |
| 1016 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); |
| 1017 | xfs_buf_relse(bp); |
| 1018 | goto error_return; |
| 1019 | } |
| 1020 | if (pathlen < byte_cnt) |
| 1021 | byte_cnt = pathlen; |
| 1022 | pathlen -= byte_cnt; |
| 1023 | |
| 1024 | error = uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop); |
| 1025 | xfs_buf_relse (bp); |
| 1026 | } |
| 1027 | |
| 1028 | } |
| 1029 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | error_return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | return error; |
| 1033 | } |
| 1034 | |
| 1035 | |
| 1036 | /* |
| 1037 | * xfs_fsync |
| 1038 | * |
| 1039 | * This is called to sync the inode and its data out to disk. |
| 1040 | * We need to hold the I/O lock while flushing the data, and |
| 1041 | * the inode lock while flushing the inode. The inode lock CANNOT |
| 1042 | * be held while flushing the data, so acquire after we're done |
| 1043 | * with that. |
| 1044 | */ |
| 1045 | STATIC int |
| 1046 | xfs_fsync( |
| 1047 | bhv_desc_t *bdp, |
| 1048 | int flag, |
| 1049 | cred_t *credp, |
| 1050 | xfs_off_t start, |
| 1051 | xfs_off_t stop) |
| 1052 | { |
| 1053 | xfs_inode_t *ip; |
| 1054 | xfs_trans_t *tp; |
| 1055 | int error; |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1056 | int log_flushed = 0, changed = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | |
| 1058 | vn_trace_entry(BHV_TO_VNODE(bdp), |
| 1059 | __FUNCTION__, (inst_t *)__return_address); |
| 1060 | |
| 1061 | ip = XFS_BHVTOI(bdp); |
| 1062 | |
| 1063 | ASSERT(start >= 0 && stop >= -1); |
| 1064 | |
| 1065 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 1066 | return XFS_ERROR(EIO); |
| 1067 | |
| 1068 | /* |
| 1069 | * We always need to make sure that the required inode state |
| 1070 | * is safe on disk. The vnode might be clean but because |
| 1071 | * of committed transactions that haven't hit the disk yet. |
| 1072 | * Likewise, there could be unflushed non-transactional |
| 1073 | * changes to the inode core that have to go to disk. |
| 1074 | * |
| 1075 | * The following code depends on one assumption: that |
| 1076 | * any transaction that changes an inode logs the core |
| 1077 | * because it has to change some field in the inode core |
| 1078 | * (typically nextents or nblocks). That assumption |
| 1079 | * implies that any transactions against an inode will |
| 1080 | * catch any non-transactional updates. If inode-altering |
| 1081 | * transactions exist that violate this assumption, the |
| 1082 | * code breaks. Right now, it figures that if the involved |
| 1083 | * update_* field is clear and the inode is unpinned, the |
| 1084 | * inode is clean. Either it's been flushed or it's been |
| 1085 | * committed and the commit has hit the disk unpinning the inode. |
| 1086 | * (Note that xfs_inode_item_format() called at commit clears |
| 1087 | * the update_* fields.) |
| 1088 | */ |
| 1089 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 1090 | |
| 1091 | /* If we are flushing data then we care about update_size |
| 1092 | * being set, otherwise we care about update_core |
| 1093 | */ |
| 1094 | if ((flag & FSYNC_DATA) ? |
| 1095 | (ip->i_update_size == 0) : |
| 1096 | (ip->i_update_core == 0)) { |
| 1097 | /* |
| 1098 | * Timestamps/size haven't changed since last inode |
| 1099 | * flush or inode transaction commit. That means |
| 1100 | * either nothing got written or a transaction |
| 1101 | * committed which caught the updates. If the |
| 1102 | * latter happened and the transaction hasn't |
| 1103 | * hit the disk yet, the inode will be still |
| 1104 | * be pinned. If it is, force the log. |
| 1105 | */ |
| 1106 | |
| 1107 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 1108 | |
| 1109 | if (xfs_ipincount(ip)) { |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1110 | _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | XFS_LOG_FORCE | |
| 1112 | ((flag & FSYNC_WAIT) |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1113 | ? XFS_LOG_SYNC : 0), |
| 1114 | &log_flushed); |
| 1115 | } else { |
| 1116 | /* |
| 1117 | * If the inode is not pinned and nothing |
| 1118 | * has changed we don't need to flush the |
| 1119 | * cache. |
| 1120 | */ |
| 1121 | changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | } |
| 1123 | error = 0; |
| 1124 | } else { |
| 1125 | /* |
| 1126 | * Kick off a transaction to log the inode |
| 1127 | * core to get the updates. Make it |
| 1128 | * sync if FSYNC_WAIT is passed in (which |
| 1129 | * is done by everybody but specfs). The |
| 1130 | * sync transaction will also force the log. |
| 1131 | */ |
| 1132 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 1133 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); |
| 1134 | if ((error = xfs_trans_reserve(tp, 0, |
| 1135 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), |
| 1136 | 0, 0, 0))) { |
| 1137 | xfs_trans_cancel(tp, 0); |
| 1138 | return error; |
| 1139 | } |
| 1140 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1141 | |
| 1142 | /* |
| 1143 | * Note - it's possible that we might have pushed |
| 1144 | * ourselves out of the way during trans_reserve |
| 1145 | * which would flush the inode. But there's no |
| 1146 | * guarantee that the inode buffer has actually |
| 1147 | * gone out yet (it's delwri). Plus the buffer |
| 1148 | * could be pinned anyway if it's part of an |
| 1149 | * inode in another recent transaction. So we |
| 1150 | * play it safe and fire off the transaction anyway. |
| 1151 | */ |
| 1152 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 1153 | xfs_trans_ihold(tp, ip); |
| 1154 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1155 | if (flag & FSYNC_WAIT) |
| 1156 | xfs_trans_set_sync(tp); |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1157 | error = _xfs_trans_commit(tp, 0, NULL, &log_flushed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
| 1159 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1160 | } |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1161 | |
| 1162 | if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { |
| 1163 | /* |
| 1164 | * If the log write didn't issue an ordered tag we need |
| 1165 | * to flush the disk cache for the data device now. |
| 1166 | */ |
| 1167 | if (!log_flushed) |
| 1168 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); |
| 1169 | |
| 1170 | /* |
| 1171 | * If this inode is on the RT dev we need to flush that |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1172 | * cache as well. |
Christoph Hellwig | f538d4d | 2005-11-02 10:26:59 +1100 | [diff] [blame] | 1173 | */ |
| 1174 | if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) |
| 1175 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
| 1176 | } |
| 1177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | return error; |
| 1179 | } |
| 1180 | |
| 1181 | /* |
| 1182 | * This is called by xfs_inactive to free any blocks beyond eof, |
| 1183 | * when the link count isn't zero. |
| 1184 | */ |
| 1185 | STATIC int |
| 1186 | xfs_inactive_free_eofblocks( |
| 1187 | xfs_mount_t *mp, |
| 1188 | xfs_inode_t *ip) |
| 1189 | { |
| 1190 | xfs_trans_t *tp; |
| 1191 | int error; |
| 1192 | xfs_fileoff_t end_fsb; |
| 1193 | xfs_fileoff_t last_fsb; |
| 1194 | xfs_filblks_t map_len; |
| 1195 | int nimaps; |
| 1196 | xfs_bmbt_irec_t imap; |
| 1197 | |
| 1198 | /* |
| 1199 | * Figure out if there are any blocks beyond the end |
| 1200 | * of the file. If not, then there is nothing to do. |
| 1201 | */ |
| 1202 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_d.di_size)); |
| 1203 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
| 1204 | map_len = last_fsb - end_fsb; |
| 1205 | if (map_len <= 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1206 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | |
| 1208 | nimaps = 1; |
| 1209 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1210 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, end_fsb, map_len, 0, |
| 1211 | NULL, 0, &imap, &nimaps, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 1213 | |
| 1214 | if (!error && (nimaps != 0) && |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 1215 | (imap.br_startblock != HOLESTARTBLOCK || |
| 1216 | ip->i_delayed_blks)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | /* |
| 1218 | * Attach the dquots to the inode up front. |
| 1219 | */ |
| 1220 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1221 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | /* |
| 1224 | * There are blocks after the end of file. |
| 1225 | * Free them up now by truncating the file to |
| 1226 | * its current size. |
| 1227 | */ |
| 1228 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 1229 | |
| 1230 | /* |
| 1231 | * Do the xfs_itruncate_start() call before |
| 1232 | * reserving any log space because |
| 1233 | * itruncate_start will call into the buffer |
| 1234 | * cache and we can't |
| 1235 | * do that within a transaction. |
| 1236 | */ |
| 1237 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 1238 | xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
| 1239 | ip->i_d.di_size); |
| 1240 | |
| 1241 | error = xfs_trans_reserve(tp, 0, |
| 1242 | XFS_ITRUNCATE_LOG_RES(mp), |
| 1243 | 0, XFS_TRANS_PERM_LOG_RES, |
| 1244 | XFS_ITRUNCATE_LOG_COUNT); |
| 1245 | if (error) { |
| 1246 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1247 | xfs_trans_cancel(tp, 0); |
| 1248 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1249 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
| 1252 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1253 | xfs_trans_ijoin(tp, ip, |
| 1254 | XFS_IOLOCK_EXCL | |
| 1255 | XFS_ILOCK_EXCL); |
| 1256 | xfs_trans_ihold(tp, ip); |
| 1257 | |
| 1258 | error = xfs_itruncate_finish(&tp, ip, |
| 1259 | ip->i_d.di_size, |
| 1260 | XFS_DATA_FORK, |
| 1261 | 0); |
| 1262 | /* |
| 1263 | * If we get an error at this point we |
| 1264 | * simply don't bother truncating the file. |
| 1265 | */ |
| 1266 | if (error) { |
| 1267 | xfs_trans_cancel(tp, |
| 1268 | (XFS_TRANS_RELEASE_LOG_RES | |
| 1269 | XFS_TRANS_ABORT)); |
| 1270 | } else { |
| 1271 | error = xfs_trans_commit(tp, |
| 1272 | XFS_TRANS_RELEASE_LOG_RES, |
| 1273 | NULL); |
| 1274 | } |
| 1275 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1276 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1277 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | } |
| 1279 | |
| 1280 | /* |
| 1281 | * Free a symlink that has blocks associated with it. |
| 1282 | */ |
| 1283 | STATIC int |
| 1284 | xfs_inactive_symlink_rmt( |
| 1285 | xfs_inode_t *ip, |
| 1286 | xfs_trans_t **tpp) |
| 1287 | { |
| 1288 | xfs_buf_t *bp; |
| 1289 | int committed; |
| 1290 | int done; |
| 1291 | int error; |
| 1292 | xfs_fsblock_t first_block; |
| 1293 | xfs_bmap_free_t free_list; |
| 1294 | int i; |
| 1295 | xfs_mount_t *mp; |
| 1296 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 1297 | int nmaps; |
| 1298 | xfs_trans_t *ntp; |
| 1299 | int size; |
| 1300 | xfs_trans_t *tp; |
| 1301 | |
| 1302 | tp = *tpp; |
| 1303 | mp = ip->i_mount; |
| 1304 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); |
| 1305 | /* |
| 1306 | * We're freeing a symlink that has some |
| 1307 | * blocks allocated to it. Free the |
| 1308 | * blocks here. We know that we've got |
| 1309 | * either 1 or 2 extents and that we can |
| 1310 | * free them all in one bunmapi call. |
| 1311 | */ |
| 1312 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); |
| 1313 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 1314 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 1315 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1316 | xfs_trans_cancel(tp, 0); |
| 1317 | *tpp = NULL; |
| 1318 | return error; |
| 1319 | } |
| 1320 | /* |
| 1321 | * Lock the inode, fix the size, and join it to the transaction. |
| 1322 | * Hold it so in the normal path, we still have it locked for |
| 1323 | * the second transaction. In the error paths we need it |
| 1324 | * held so the cancel won't rele it, see below. |
| 1325 | */ |
| 1326 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1327 | size = (int)ip->i_d.di_size; |
| 1328 | ip->i_d.di_size = 0; |
| 1329 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1330 | xfs_trans_ihold(tp, ip); |
| 1331 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1332 | /* |
| 1333 | * Find the block(s) so we can inval and unmap them. |
| 1334 | */ |
| 1335 | done = 0; |
| 1336 | XFS_BMAP_INIT(&free_list, &first_block); |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 1337 | nmaps = ARRAY_SIZE(mval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
| 1339 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1340 | &free_list, NULL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | goto error0; |
| 1342 | /* |
| 1343 | * Invalidate the block(s). |
| 1344 | */ |
| 1345 | for (i = 0; i < nmaps; i++) { |
| 1346 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
| 1347 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), |
| 1348 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); |
| 1349 | xfs_trans_binval(tp, bp); |
| 1350 | } |
| 1351 | /* |
| 1352 | * Unmap the dead block(s) to the free_list. |
| 1353 | */ |
| 1354 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1355 | &first_block, &free_list, NULL, &done))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | goto error1; |
| 1357 | ASSERT(done); |
| 1358 | /* |
| 1359 | * Commit the first transaction. This logs the EFI and the inode. |
| 1360 | */ |
| 1361 | if ((error = xfs_bmap_finish(&tp, &free_list, first_block, &committed))) |
| 1362 | goto error1; |
| 1363 | /* |
| 1364 | * The transaction must have been committed, since there were |
| 1365 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. |
| 1366 | * The new tp has the extent freeing and EFDs. |
| 1367 | */ |
| 1368 | ASSERT(committed); |
| 1369 | /* |
| 1370 | * The first xact was committed, so add the inode to the new one. |
| 1371 | * Mark it dirty so it will be logged and moved forward in the log as |
| 1372 | * part of every commit. |
| 1373 | */ |
| 1374 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1375 | xfs_trans_ihold(tp, ip); |
| 1376 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1377 | /* |
| 1378 | * Get a new, empty transaction to return to our caller. |
| 1379 | */ |
| 1380 | ntp = xfs_trans_dup(tp); |
| 1381 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1382 | * Commit the transaction containing extent freeing and EFDs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | * If we get an error on the commit here or on the reserve below, |
| 1384 | * we need to unlock the inode since the new transaction doesn't |
| 1385 | * have the inode attached. |
| 1386 | */ |
| 1387 | error = xfs_trans_commit(tp, 0, NULL); |
| 1388 | tp = ntp; |
| 1389 | if (error) { |
| 1390 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1391 | goto error0; |
| 1392 | } |
| 1393 | /* |
| 1394 | * Remove the memory for extent descriptions (just bookkeeping). |
| 1395 | */ |
| 1396 | if (ip->i_df.if_bytes) |
| 1397 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); |
| 1398 | ASSERT(ip->i_df.if_bytes == 0); |
| 1399 | /* |
| 1400 | * Put an itruncate log reservation in the new transaction |
| 1401 | * for our caller. |
| 1402 | */ |
| 1403 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 1404 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| 1405 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1406 | goto error0; |
| 1407 | } |
| 1408 | /* |
| 1409 | * Return with the inode locked but not joined to the transaction. |
| 1410 | */ |
| 1411 | *tpp = tp; |
| 1412 | return 0; |
| 1413 | |
| 1414 | error1: |
| 1415 | xfs_bmap_cancel(&free_list); |
| 1416 | error0: |
| 1417 | /* |
| 1418 | * Have to come here with the inode locked and either |
| 1419 | * (held and in the transaction) or (not in the transaction). |
| 1420 | * If the inode isn't held then cancel would iput it, but |
| 1421 | * that's wrong since this is inactive and the vnode ref |
| 1422 | * count is 0 already. |
| 1423 | * Cancel won't do anything to the inode if held, but it still |
| 1424 | * needs to be locked until the cancel is done, if it was |
| 1425 | * joined to the transaction. |
| 1426 | */ |
| 1427 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 1428 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1429 | *tpp = NULL; |
| 1430 | return error; |
| 1431 | |
| 1432 | } |
| 1433 | |
| 1434 | STATIC int |
| 1435 | xfs_inactive_symlink_local( |
| 1436 | xfs_inode_t *ip, |
| 1437 | xfs_trans_t **tpp) |
| 1438 | { |
| 1439 | int error; |
| 1440 | |
| 1441 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); |
| 1442 | /* |
| 1443 | * We're freeing a symlink which fit into |
| 1444 | * the inode. Just free the memory used |
| 1445 | * to hold the old symlink. |
| 1446 | */ |
| 1447 | error = xfs_trans_reserve(*tpp, 0, |
| 1448 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), |
| 1449 | 0, XFS_TRANS_PERM_LOG_RES, |
| 1450 | XFS_ITRUNCATE_LOG_COUNT); |
| 1451 | |
| 1452 | if (error) { |
| 1453 | xfs_trans_cancel(*tpp, 0); |
| 1454 | *tpp = NULL; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1455 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | } |
| 1457 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1458 | |
| 1459 | /* |
| 1460 | * Zero length symlinks _can_ exist. |
| 1461 | */ |
| 1462 | if (ip->i_df.if_bytes > 0) { |
| 1463 | xfs_idata_realloc(ip, |
| 1464 | -(ip->i_df.if_bytes), |
| 1465 | XFS_DATA_FORK); |
| 1466 | ASSERT(ip->i_df.if_bytes == 0); |
| 1467 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1468 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | } |
| 1470 | |
| 1471 | /* |
| 1472 | * |
| 1473 | */ |
| 1474 | STATIC int |
| 1475 | xfs_inactive_attrs( |
| 1476 | xfs_inode_t *ip, |
| 1477 | xfs_trans_t **tpp) |
| 1478 | { |
| 1479 | xfs_trans_t *tp; |
| 1480 | int error; |
| 1481 | xfs_mount_t *mp; |
| 1482 | |
| 1483 | ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); |
| 1484 | tp = *tpp; |
| 1485 | mp = ip->i_mount; |
| 1486 | ASSERT(ip->i_d.di_forkoff != 0); |
| 1487 | xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 1488 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1489 | |
| 1490 | error = xfs_attr_inactive(ip); |
| 1491 | if (error) { |
| 1492 | *tpp = NULL; |
| 1493 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1494 | return error; /* goto out */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | } |
| 1496 | |
| 1497 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 1498 | error = xfs_trans_reserve(tp, 0, |
| 1499 | XFS_IFREE_LOG_RES(mp), |
| 1500 | 0, XFS_TRANS_PERM_LOG_RES, |
| 1501 | XFS_INACTIVE_LOG_COUNT); |
| 1502 | if (error) { |
| 1503 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1504 | xfs_trans_cancel(tp, 0); |
| 1505 | *tpp = NULL; |
| 1506 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1507 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | } |
| 1509 | |
| 1510 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1511 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1512 | xfs_trans_ihold(tp, ip); |
| 1513 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 1514 | |
| 1515 | ASSERT(ip->i_d.di_anextents == 0); |
| 1516 | |
| 1517 | *tpp = tp; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1518 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | } |
| 1520 | |
| 1521 | STATIC int |
| 1522 | xfs_release( |
| 1523 | bhv_desc_t *bdp) |
| 1524 | { |
| 1525 | xfs_inode_t *ip; |
| 1526 | vnode_t *vp; |
| 1527 | xfs_mount_t *mp; |
| 1528 | int error; |
| 1529 | |
| 1530 | vp = BHV_TO_VNODE(bdp); |
| 1531 | ip = XFS_BHVTOI(bdp); |
| 1532 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 1533 | if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | return 0; |
| 1535 | } |
| 1536 | |
| 1537 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
| 1538 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| 1539 | return 0; |
| 1540 | |
| 1541 | #ifdef HAVE_REFCACHE |
| 1542 | /* If we are in the NFS reference cache then don't do this now */ |
| 1543 | if (ip->i_refcache) |
| 1544 | return 0; |
| 1545 | #endif |
| 1546 | |
| 1547 | mp = ip->i_mount; |
| 1548 | |
| 1549 | if (ip->i_d.di_nlink != 0) { |
| 1550 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 1551 | ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 || |
| 1552 | ip->i_delayed_blks > 0)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1554 | (!(ip->i_d.di_flags & |
| 1555 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | if ((error = xfs_inactive_free_eofblocks(mp, ip))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1557 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | /* Update linux inode block count after free above */ |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1559 | vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | return 0; |
| 1565 | } |
| 1566 | |
| 1567 | /* |
| 1568 | * xfs_inactive |
| 1569 | * |
| 1570 | * This is called when the vnode reference count for the vnode |
| 1571 | * goes to zero. If the file has been unlinked, then it must |
| 1572 | * now be truncated. Also, we clear all of the read-ahead state |
| 1573 | * kept for the inode here since the file is now closed. |
| 1574 | */ |
| 1575 | STATIC int |
| 1576 | xfs_inactive( |
| 1577 | bhv_desc_t *bdp, |
| 1578 | cred_t *credp) |
| 1579 | { |
| 1580 | xfs_inode_t *ip; |
| 1581 | vnode_t *vp; |
| 1582 | xfs_bmap_free_t free_list; |
| 1583 | xfs_fsblock_t first_block; |
| 1584 | int committed; |
| 1585 | xfs_trans_t *tp; |
| 1586 | xfs_mount_t *mp; |
| 1587 | int error; |
| 1588 | int truncate; |
| 1589 | |
| 1590 | vp = BHV_TO_VNODE(bdp); |
| 1591 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 1592 | |
| 1593 | ip = XFS_BHVTOI(bdp); |
| 1594 | |
| 1595 | /* |
| 1596 | * If the inode is already free, then there can be nothing |
| 1597 | * to clean up here. |
| 1598 | */ |
| 1599 | if (ip->i_d.di_mode == 0 || VN_BAD(vp)) { |
| 1600 | ASSERT(ip->i_df.if_real_bytes == 0); |
| 1601 | ASSERT(ip->i_df.if_broot_bytes == 0); |
| 1602 | return VN_INACTIVE_CACHE; |
| 1603 | } |
| 1604 | |
| 1605 | /* |
| 1606 | * Only do a truncate if it's a regular file with |
| 1607 | * some actual space in it. It's OK to look at the |
| 1608 | * inode's fields without the lock because we're the |
| 1609 | * only one with a reference to the inode. |
| 1610 | */ |
| 1611 | truncate = ((ip->i_d.di_nlink == 0) && |
Yingping Lu | 1661dc8 | 2006-01-11 15:29:39 +1100 | [diff] [blame] | 1612 | ((ip->i_d.di_size != 0) || (ip->i_d.di_nextents > 0) || |
| 1613 | (ip->i_delayed_blks > 0)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
| 1615 | |
| 1616 | mp = ip->i_mount; |
| 1617 | |
| 1618 | if (ip->i_d.di_nlink == 0 && |
| 1619 | DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) { |
| 1620 | (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL); |
| 1621 | } |
| 1622 | |
| 1623 | error = 0; |
| 1624 | |
| 1625 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
| 1626 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| 1627 | goto out; |
| 1628 | |
| 1629 | if (ip->i_d.di_nlink != 0) { |
| 1630 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && |
Yingping Lu | 68bdb6e | 2006-01-11 15:38:31 +1100 | [diff] [blame] | 1631 | ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 || |
| 1632 | ip->i_delayed_blks > 0)) && |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1633 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
| 1634 | (!(ip->i_d.di_flags & |
| 1635 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || |
| 1636 | (ip->i_delayed_blks != 0)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | if ((error = xfs_inactive_free_eofblocks(mp, ip))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1638 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | /* Update linux inode block count after free above */ |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 1640 | vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 1642 | } |
| 1643 | goto out; |
| 1644 | } |
| 1645 | |
| 1646 | ASSERT(ip->i_d.di_nlink == 0); |
| 1647 | |
| 1648 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1649 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | |
| 1651 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 1652 | if (truncate) { |
| 1653 | /* |
| 1654 | * Do the xfs_itruncate_start() call before |
| 1655 | * reserving any log space because itruncate_start |
| 1656 | * will call into the buffer cache and we can't |
| 1657 | * do that within a transaction. |
| 1658 | */ |
| 1659 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 1660 | |
| 1661 | xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
| 1662 | |
| 1663 | error = xfs_trans_reserve(tp, 0, |
| 1664 | XFS_ITRUNCATE_LOG_RES(mp), |
| 1665 | 0, XFS_TRANS_PERM_LOG_RES, |
| 1666 | XFS_ITRUNCATE_LOG_COUNT); |
| 1667 | if (error) { |
| 1668 | /* Don't call itruncate_cleanup */ |
| 1669 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1670 | xfs_trans_cancel(tp, 0); |
| 1671 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1672 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | } |
| 1674 | |
| 1675 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1676 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1677 | xfs_trans_ihold(tp, ip); |
| 1678 | |
| 1679 | /* |
| 1680 | * normally, we have to run xfs_itruncate_finish sync. |
| 1681 | * But if filesystem is wsync and we're in the inactive |
| 1682 | * path, then we know that nlink == 0, and that the |
| 1683 | * xaction that made nlink == 0 is permanently committed |
| 1684 | * since xfs_remove runs as a synchronous transaction. |
| 1685 | */ |
| 1686 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, |
| 1687 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); |
| 1688 | |
| 1689 | if (error) { |
| 1690 | xfs_trans_cancel(tp, |
| 1691 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 1692 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1693 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | } |
| 1695 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { |
| 1696 | |
| 1697 | /* |
| 1698 | * If we get an error while cleaning up a |
| 1699 | * symlink we bail out. |
| 1700 | */ |
| 1701 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? |
| 1702 | xfs_inactive_symlink_rmt(ip, &tp) : |
| 1703 | xfs_inactive_symlink_local(ip, &tp); |
| 1704 | |
| 1705 | if (error) { |
| 1706 | ASSERT(tp == NULL); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1707 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | } |
| 1709 | |
| 1710 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1711 | xfs_trans_ihold(tp, ip); |
| 1712 | } else { |
| 1713 | error = xfs_trans_reserve(tp, 0, |
| 1714 | XFS_IFREE_LOG_RES(mp), |
| 1715 | 0, XFS_TRANS_PERM_LOG_RES, |
| 1716 | XFS_INACTIVE_LOG_COUNT); |
| 1717 | if (error) { |
| 1718 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| 1719 | xfs_trans_cancel(tp, 0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1720 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | } |
| 1722 | |
| 1723 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1724 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1725 | xfs_trans_ihold(tp, ip); |
| 1726 | } |
| 1727 | |
| 1728 | /* |
| 1729 | * If there are attributes associated with the file |
| 1730 | * then blow them away now. The code calls a routine |
| 1731 | * that recursively deconstructs the attribute fork. |
| 1732 | * We need to just commit the current transaction |
| 1733 | * because we can't use it for xfs_attr_inactive(). |
| 1734 | */ |
| 1735 | if (ip->i_d.di_anextents > 0) { |
| 1736 | error = xfs_inactive_attrs(ip, &tp); |
| 1737 | /* |
| 1738 | * If we got an error, the transaction is already |
| 1739 | * cancelled, and the inode is unlocked. Just get out. |
| 1740 | */ |
| 1741 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1742 | return VN_INACTIVE_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | } else if (ip->i_afp) { |
| 1744 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 1745 | } |
| 1746 | |
| 1747 | /* |
| 1748 | * Free the inode. |
| 1749 | */ |
| 1750 | XFS_BMAP_INIT(&free_list, &first_block); |
| 1751 | error = xfs_ifree(tp, ip, &free_list); |
| 1752 | if (error) { |
| 1753 | /* |
| 1754 | * If we fail to free the inode, shut down. The cancel |
| 1755 | * might do that, we need to make sure. Otherwise the |
| 1756 | * inode might be lost for a long time or forever. |
| 1757 | */ |
| 1758 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
| 1759 | cmn_err(CE_NOTE, |
| 1760 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", |
| 1761 | error, mp->m_fsname); |
| 1762 | xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR); |
| 1763 | } |
| 1764 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 1765 | } else { |
| 1766 | /* |
| 1767 | * Credit the quota account(s). The inode is gone. |
| 1768 | */ |
| 1769 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
| 1770 | |
| 1771 | /* |
| 1772 | * Just ignore errors at this point. There is |
| 1773 | * nothing we can do except to try to keep going. |
| 1774 | */ |
| 1775 | (void) xfs_bmap_finish(&tp, &free_list, first_block, |
| 1776 | &committed); |
| 1777 | (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 1778 | } |
| 1779 | /* |
| 1780 | * Release the dquots held by inode, if any. |
| 1781 | */ |
| 1782 | XFS_QM_DQDETACH(mp, ip); |
| 1783 | |
| 1784 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| 1785 | |
| 1786 | out: |
| 1787 | return VN_INACTIVE_CACHE; |
| 1788 | } |
| 1789 | |
| 1790 | |
| 1791 | /* |
| 1792 | * xfs_lookup |
| 1793 | */ |
| 1794 | STATIC int |
| 1795 | xfs_lookup( |
| 1796 | bhv_desc_t *dir_bdp, |
| 1797 | vname_t *dentry, |
| 1798 | vnode_t **vpp, |
| 1799 | int flags, |
| 1800 | vnode_t *rdir, |
| 1801 | cred_t *credp) |
| 1802 | { |
| 1803 | xfs_inode_t *dp, *ip; |
| 1804 | xfs_ino_t e_inum; |
| 1805 | int error; |
| 1806 | uint lock_mode; |
| 1807 | vnode_t *dir_vp; |
| 1808 | |
| 1809 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 1810 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 1811 | |
| 1812 | dp = XFS_BHVTOI(dir_bdp); |
| 1813 | |
| 1814 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 1815 | return XFS_ERROR(EIO); |
| 1816 | |
| 1817 | lock_mode = xfs_ilock_map_shared(dp); |
| 1818 | error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip); |
| 1819 | if (!error) { |
| 1820 | *vpp = XFS_ITOV(ip); |
| 1821 | ITRACE(ip); |
| 1822 | } |
| 1823 | xfs_iunlock_map_shared(dp, lock_mode); |
| 1824 | return error; |
| 1825 | } |
| 1826 | |
| 1827 | |
| 1828 | /* |
| 1829 | * xfs_create (create a new file). |
| 1830 | */ |
| 1831 | STATIC int |
| 1832 | xfs_create( |
| 1833 | bhv_desc_t *dir_bdp, |
| 1834 | vname_t *dentry, |
| 1835 | vattr_t *vap, |
| 1836 | vnode_t **vpp, |
| 1837 | cred_t *credp) |
| 1838 | { |
| 1839 | char *name = VNAME(dentry); |
| 1840 | vnode_t *dir_vp; |
| 1841 | xfs_inode_t *dp, *ip; |
| 1842 | vnode_t *vp=NULL; |
| 1843 | xfs_trans_t *tp; |
| 1844 | xfs_mount_t *mp; |
| 1845 | xfs_dev_t rdev; |
| 1846 | int error; |
| 1847 | xfs_bmap_free_t free_list; |
| 1848 | xfs_fsblock_t first_block; |
| 1849 | boolean_t dp_joined_to_trans; |
| 1850 | int dm_event_sent = 0; |
| 1851 | uint cancel_flags; |
| 1852 | int committed; |
| 1853 | xfs_prid_t prid; |
| 1854 | struct xfs_dquot *udqp, *gdqp; |
| 1855 | uint resblks; |
| 1856 | int dm_di_mode; |
| 1857 | int namelen; |
| 1858 | |
| 1859 | ASSERT(!*vpp); |
| 1860 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 1861 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 1862 | |
| 1863 | dp = XFS_BHVTOI(dir_bdp); |
| 1864 | mp = dp->i_mount; |
| 1865 | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 1866 | dm_di_mode = vap->va_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | namelen = VNAMELEN(dentry); |
| 1868 | |
| 1869 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { |
| 1870 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
| 1871 | dir_vp, DM_RIGHT_NULL, NULL, |
| 1872 | DM_RIGHT_NULL, name, NULL, |
| 1873 | dm_di_mode, 0, 0); |
| 1874 | |
| 1875 | if (error) |
| 1876 | return error; |
| 1877 | dm_event_sent = 1; |
| 1878 | } |
| 1879 | |
| 1880 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1881 | return XFS_ERROR(EIO); |
| 1882 | |
| 1883 | /* Return through std_return after this point. */ |
| 1884 | |
| 1885 | udqp = gdqp = NULL; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1886 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 1887 | prid = dp->i_d.di_projid; |
| 1888 | else if (vap->va_mask & XFS_AT_PROJID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | prid = (xfs_prid_t)vap->va_projid; |
| 1890 | else |
| 1891 | prid = (xfs_prid_t)dfltprid; |
| 1892 | |
| 1893 | /* |
| 1894 | * Make sure that we have allocated dquot(s) on disk. |
| 1895 | */ |
| 1896 | error = XFS_QM_DQVOPALLOC(mp, dp, |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 1897 | current_fsuid(credp), current_fsgid(credp), prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| 1899 | if (error) |
| 1900 | goto std_return; |
| 1901 | |
| 1902 | ip = NULL; |
| 1903 | dp_joined_to_trans = B_FALSE; |
| 1904 | |
| 1905 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); |
| 1906 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 1907 | resblks = XFS_CREATE_SPACE_RES(mp, namelen); |
| 1908 | /* |
| 1909 | * Initially assume that the file does not exist and |
| 1910 | * reserve the resources for that case. If that is not |
| 1911 | * the case we'll drop the one we have and get a more |
| 1912 | * appropriate transaction later. |
| 1913 | */ |
| 1914 | error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0, |
| 1915 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); |
| 1916 | if (error == ENOSPC) { |
| 1917 | resblks = 0; |
| 1918 | error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0, |
| 1919 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); |
| 1920 | } |
| 1921 | if (error) { |
| 1922 | cancel_flags = 0; |
| 1923 | dp = NULL; |
| 1924 | goto error_return; |
| 1925 | } |
| 1926 | |
| 1927 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 1928 | |
| 1929 | XFS_BMAP_INIT(&free_list, &first_block); |
| 1930 | |
| 1931 | ASSERT(ip == NULL); |
| 1932 | |
| 1933 | /* |
| 1934 | * Reserve disk quota and the inode. |
| 1935 | */ |
| 1936 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| 1937 | if (error) |
| 1938 | goto error_return; |
| 1939 | |
| 1940 | if (resblks == 0 && |
| 1941 | (error = XFS_DIR_CANENTER(mp, tp, dp, name, namelen))) |
| 1942 | goto error_return; |
| 1943 | rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0; |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 1944 | error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | rdev, credp, prid, resblks > 0, |
| 1946 | &ip, &committed); |
| 1947 | if (error) { |
| 1948 | if (error == ENOSPC) |
| 1949 | goto error_return; |
| 1950 | goto abort_return; |
| 1951 | } |
| 1952 | ITRACE(ip); |
| 1953 | |
| 1954 | /* |
| 1955 | * At this point, we've gotten a newly allocated inode. |
| 1956 | * It is locked (and joined to the transaction). |
| 1957 | */ |
| 1958 | |
| 1959 | ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE)); |
| 1960 | |
| 1961 | /* |
| 1962 | * Now we join the directory inode to the transaction. |
| 1963 | * We do not do it earlier because xfs_dir_ialloc |
| 1964 | * might commit the previous transaction (and release |
| 1965 | * all the locks). |
| 1966 | */ |
| 1967 | |
| 1968 | VN_HOLD(dir_vp); |
| 1969 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 1970 | dp_joined_to_trans = B_TRUE; |
| 1971 | |
| 1972 | error = XFS_DIR_CREATENAME(mp, tp, dp, name, namelen, ip->i_ino, |
| 1973 | &first_block, &free_list, |
| 1974 | resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
| 1975 | if (error) { |
| 1976 | ASSERT(error != ENOSPC); |
| 1977 | goto abort_return; |
| 1978 | } |
| 1979 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 1980 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 1981 | |
| 1982 | /* |
| 1983 | * If this is a synchronous mount, make sure that the |
| 1984 | * create transaction goes to disk before returning to |
| 1985 | * the user. |
| 1986 | */ |
| 1987 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 1988 | xfs_trans_set_sync(tp); |
| 1989 | } |
| 1990 | |
| 1991 | dp->i_gen++; |
| 1992 | |
| 1993 | /* |
| 1994 | * Attach the dquot(s) to the inodes and modify them incore. |
| 1995 | * These ids of the inode couldn't have changed since the new |
| 1996 | * inode has been locked ever since it was created. |
| 1997 | */ |
| 1998 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); |
| 1999 | |
| 2000 | /* |
| 2001 | * xfs_trans_commit normally decrements the vnode ref count |
| 2002 | * when it unlocks the inode. Since we want to return the |
| 2003 | * vnode to the caller, we bump the vnode ref count now. |
| 2004 | */ |
| 2005 | IHOLD(ip); |
| 2006 | vp = XFS_ITOV(ip); |
| 2007 | |
| 2008 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| 2009 | if (error) { |
| 2010 | xfs_bmap_cancel(&free_list); |
| 2011 | goto abort_rele; |
| 2012 | } |
| 2013 | |
| 2014 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 2015 | if (error) { |
| 2016 | IRELE(ip); |
| 2017 | tp = NULL; |
| 2018 | goto error_return; |
| 2019 | } |
| 2020 | |
| 2021 | XFS_QM_DQRELE(mp, udqp); |
| 2022 | XFS_QM_DQRELE(mp, gdqp); |
| 2023 | |
| 2024 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 2025 | * Propagate the fact that the vnode changed after the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | * xfs_inode locks have been released. |
| 2027 | */ |
| 2028 | VOP_VNODE_CHANGE(vp, VCHANGE_FLAGS_TRUNCATED, 3); |
| 2029 | |
| 2030 | *vpp = vp; |
| 2031 | |
| 2032 | /* Fallthrough to std_return with error = 0 */ |
| 2033 | |
| 2034 | std_return: |
| 2035 | if ( (*vpp || (error != 0 && dm_event_sent != 0)) && |
| 2036 | DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| 2037 | DM_EVENT_POSTCREATE)) { |
| 2038 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
| 2039 | dir_vp, DM_RIGHT_NULL, |
| 2040 | *vpp ? vp:NULL, |
| 2041 | DM_RIGHT_NULL, name, NULL, |
| 2042 | dm_di_mode, error, 0); |
| 2043 | } |
| 2044 | return error; |
| 2045 | |
| 2046 | abort_return: |
| 2047 | cancel_flags |= XFS_TRANS_ABORT; |
| 2048 | /* FALLTHROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2050 | error_return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | if (tp != NULL) |
| 2052 | xfs_trans_cancel(tp, cancel_flags); |
| 2053 | |
| 2054 | if (!dp_joined_to_trans && (dp != NULL)) |
| 2055 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 2056 | XFS_QM_DQRELE(mp, udqp); |
| 2057 | XFS_QM_DQRELE(mp, gdqp); |
| 2058 | |
| 2059 | goto std_return; |
| 2060 | |
| 2061 | abort_rele: |
| 2062 | /* |
| 2063 | * Wait until after the current transaction is aborted to |
| 2064 | * release the inode. This prevents recursive transactions |
| 2065 | * and deadlocks from xfs_inactive. |
| 2066 | */ |
| 2067 | cancel_flags |= XFS_TRANS_ABORT; |
| 2068 | xfs_trans_cancel(tp, cancel_flags); |
| 2069 | IRELE(ip); |
| 2070 | |
| 2071 | XFS_QM_DQRELE(mp, udqp); |
| 2072 | XFS_QM_DQRELE(mp, gdqp); |
| 2073 | |
| 2074 | goto std_return; |
| 2075 | } |
| 2076 | |
| 2077 | #ifdef DEBUG |
| 2078 | /* |
| 2079 | * Some counters to see if (and how often) we are hitting some deadlock |
| 2080 | * prevention code paths. |
| 2081 | */ |
| 2082 | |
| 2083 | int xfs_rm_locks; |
| 2084 | int xfs_rm_lock_delays; |
| 2085 | int xfs_rm_attempts; |
| 2086 | #endif |
| 2087 | |
| 2088 | /* |
| 2089 | * The following routine will lock the inodes associated with the |
| 2090 | * directory and the named entry in the directory. The locks are |
| 2091 | * acquired in increasing inode number. |
| 2092 | * |
| 2093 | * If the entry is "..", then only the directory is locked. The |
| 2094 | * vnode ref count will still include that from the .. entry in |
| 2095 | * this case. |
| 2096 | * |
| 2097 | * There is a deadlock we need to worry about. If the locked directory is |
| 2098 | * in the AIL, it might be blocking up the log. The next inode we lock |
| 2099 | * could be already locked by another thread waiting for log space (e.g |
| 2100 | * a permanent log reservation with a long running transaction (see |
| 2101 | * xfs_itruncate_finish)). To solve this, we must check if the directory |
| 2102 | * is in the ail and use lock_nowait. If we can't lock, we need to |
| 2103 | * drop the inode lock on the directory and try again. xfs_iunlock will |
| 2104 | * potentially push the tail if we were holding up the log. |
| 2105 | */ |
| 2106 | STATIC int |
| 2107 | xfs_lock_dir_and_entry( |
| 2108 | xfs_inode_t *dp, |
| 2109 | vname_t *dentry, |
| 2110 | xfs_inode_t *ip) /* inode of entry 'name' */ |
| 2111 | { |
| 2112 | int attempts; |
| 2113 | xfs_ino_t e_inum; |
| 2114 | xfs_inode_t *ips[2]; |
| 2115 | xfs_log_item_t *lp; |
| 2116 | |
| 2117 | #ifdef DEBUG |
| 2118 | xfs_rm_locks++; |
| 2119 | #endif |
| 2120 | attempts = 0; |
| 2121 | |
| 2122 | again: |
| 2123 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 2124 | |
| 2125 | e_inum = ip->i_ino; |
| 2126 | |
| 2127 | ITRACE(ip); |
| 2128 | |
| 2129 | /* |
| 2130 | * We want to lock in increasing inum. Since we've already |
| 2131 | * acquired the lock on the directory, we may need to release |
| 2132 | * if if the inum of the entry turns out to be less. |
| 2133 | */ |
| 2134 | if (e_inum > dp->i_ino) { |
| 2135 | /* |
| 2136 | * We are already in the right order, so just |
| 2137 | * lock on the inode of the entry. |
| 2138 | * We need to use nowait if dp is in the AIL. |
| 2139 | */ |
| 2140 | |
| 2141 | lp = (xfs_log_item_t *)dp->i_itemp; |
| 2142 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 2143 | if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { |
| 2144 | attempts++; |
| 2145 | #ifdef DEBUG |
| 2146 | xfs_rm_attempts++; |
| 2147 | #endif |
| 2148 | |
| 2149 | /* |
| 2150 | * Unlock dp and try again. |
| 2151 | * xfs_iunlock will try to push the tail |
| 2152 | * if the inode is in the AIL. |
| 2153 | */ |
| 2154 | |
| 2155 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 2156 | |
| 2157 | if ((attempts % 5) == 0) { |
| 2158 | delay(1); /* Don't just spin the CPU */ |
| 2159 | #ifdef DEBUG |
| 2160 | xfs_rm_lock_delays++; |
| 2161 | #endif |
| 2162 | } |
| 2163 | goto again; |
| 2164 | } |
| 2165 | } else { |
| 2166 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 2167 | } |
| 2168 | } else if (e_inum < dp->i_ino) { |
| 2169 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 2170 | |
| 2171 | ips[0] = ip; |
| 2172 | ips[1] = dp; |
| 2173 | xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); |
| 2174 | } |
| 2175 | /* else e_inum == dp->i_ino */ |
| 2176 | /* This can happen if we're asked to lock /x/.. |
| 2177 | * the entry is "..", which is also the parent directory. |
| 2178 | */ |
| 2179 | |
| 2180 | return 0; |
| 2181 | } |
| 2182 | |
| 2183 | #ifdef DEBUG |
| 2184 | int xfs_locked_n; |
| 2185 | int xfs_small_retries; |
| 2186 | int xfs_middle_retries; |
| 2187 | int xfs_lots_retries; |
| 2188 | int xfs_lock_delays; |
| 2189 | #endif |
| 2190 | |
| 2191 | /* |
| 2192 | * The following routine will lock n inodes in exclusive mode. |
| 2193 | * We assume the caller calls us with the inodes in i_ino order. |
| 2194 | * |
| 2195 | * We need to detect deadlock where an inode that we lock |
| 2196 | * is in the AIL and we start waiting for another inode that is locked |
| 2197 | * by a thread in a long running transaction (such as truncate). This can |
| 2198 | * result in deadlock since the long running trans might need to wait |
| 2199 | * for the inode we just locked in order to push the tail and free space |
| 2200 | * in the log. |
| 2201 | */ |
| 2202 | void |
| 2203 | xfs_lock_inodes( |
| 2204 | xfs_inode_t **ips, |
| 2205 | int inodes, |
| 2206 | int first_locked, |
| 2207 | uint lock_mode) |
| 2208 | { |
| 2209 | int attempts = 0, i, j, try_lock; |
| 2210 | xfs_log_item_t *lp; |
| 2211 | |
| 2212 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ |
| 2213 | |
| 2214 | if (first_locked) { |
| 2215 | try_lock = 1; |
| 2216 | i = 1; |
| 2217 | } else { |
| 2218 | try_lock = 0; |
| 2219 | i = 0; |
| 2220 | } |
| 2221 | |
| 2222 | again: |
| 2223 | for (; i < inodes; i++) { |
| 2224 | ASSERT(ips[i]); |
| 2225 | |
| 2226 | if (i && (ips[i] == ips[i-1])) /* Already locked */ |
| 2227 | continue; |
| 2228 | |
| 2229 | /* |
| 2230 | * If try_lock is not set yet, make sure all locked inodes |
| 2231 | * are not in the AIL. |
| 2232 | * If any are, set try_lock to be used later. |
| 2233 | */ |
| 2234 | |
| 2235 | if (!try_lock) { |
| 2236 | for (j = (i - 1); j >= 0 && !try_lock; j--) { |
| 2237 | lp = (xfs_log_item_t *)ips[j]->i_itemp; |
| 2238 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| 2239 | try_lock++; |
| 2240 | } |
| 2241 | } |
| 2242 | } |
| 2243 | |
| 2244 | /* |
| 2245 | * If any of the previous locks we have locked is in the AIL, |
| 2246 | * we must TRY to get the second and subsequent locks. If |
| 2247 | * we can't get any, we must release all we have |
| 2248 | * and try again. |
| 2249 | */ |
| 2250 | |
| 2251 | if (try_lock) { |
| 2252 | /* try_lock must be 0 if i is 0. */ |
| 2253 | /* |
| 2254 | * try_lock means we have an inode locked |
| 2255 | * that is in the AIL. |
| 2256 | */ |
| 2257 | ASSERT(i != 0); |
| 2258 | if (!xfs_ilock_nowait(ips[i], lock_mode)) { |
| 2259 | attempts++; |
| 2260 | |
| 2261 | /* |
| 2262 | * Unlock all previous guys and try again. |
| 2263 | * xfs_iunlock will try to push the tail |
| 2264 | * if the inode is in the AIL. |
| 2265 | */ |
| 2266 | |
| 2267 | for(j = i - 1; j >= 0; j--) { |
| 2268 | |
| 2269 | /* |
| 2270 | * Check to see if we've already |
| 2271 | * unlocked this one. |
| 2272 | * Not the first one going back, |
| 2273 | * and the inode ptr is the same. |
| 2274 | */ |
| 2275 | if ((j != (i - 1)) && ips[j] == |
| 2276 | ips[j+1]) |
| 2277 | continue; |
| 2278 | |
| 2279 | xfs_iunlock(ips[j], lock_mode); |
| 2280 | } |
| 2281 | |
| 2282 | if ((attempts % 5) == 0) { |
| 2283 | delay(1); /* Don't just spin the CPU */ |
| 2284 | #ifdef DEBUG |
| 2285 | xfs_lock_delays++; |
| 2286 | #endif |
| 2287 | } |
| 2288 | i = 0; |
| 2289 | try_lock = 0; |
| 2290 | goto again; |
| 2291 | } |
| 2292 | } else { |
| 2293 | xfs_ilock(ips[i], lock_mode); |
| 2294 | } |
| 2295 | } |
| 2296 | |
| 2297 | #ifdef DEBUG |
| 2298 | if (attempts) { |
| 2299 | if (attempts < 5) xfs_small_retries++; |
| 2300 | else if (attempts < 100) xfs_middle_retries++; |
| 2301 | else xfs_lots_retries++; |
| 2302 | } else { |
| 2303 | xfs_locked_n++; |
| 2304 | } |
| 2305 | #endif |
| 2306 | } |
| 2307 | |
| 2308 | #ifdef DEBUG |
| 2309 | #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);} |
| 2310 | int remove_which_error_return = 0; |
| 2311 | #else /* ! DEBUG */ |
| 2312 | #define REMOVE_DEBUG_TRACE(x) |
| 2313 | #endif /* ! DEBUG */ |
| 2314 | |
| 2315 | |
| 2316 | /* |
| 2317 | * xfs_remove |
| 2318 | * |
| 2319 | */ |
| 2320 | STATIC int |
| 2321 | xfs_remove( |
| 2322 | bhv_desc_t *dir_bdp, |
| 2323 | vname_t *dentry, |
| 2324 | cred_t *credp) |
| 2325 | { |
| 2326 | vnode_t *dir_vp; |
| 2327 | char *name = VNAME(dentry); |
| 2328 | xfs_inode_t *dp, *ip; |
| 2329 | xfs_trans_t *tp = NULL; |
| 2330 | xfs_mount_t *mp; |
| 2331 | int error = 0; |
| 2332 | xfs_bmap_free_t free_list; |
| 2333 | xfs_fsblock_t first_block; |
| 2334 | int cancel_flags; |
| 2335 | int committed; |
| 2336 | int dm_di_mode = 0; |
| 2337 | int link_zero; |
| 2338 | uint resblks; |
| 2339 | int namelen; |
| 2340 | |
| 2341 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 2342 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 2343 | |
| 2344 | dp = XFS_BHVTOI(dir_bdp); |
| 2345 | mp = dp->i_mount; |
| 2346 | |
| 2347 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 2348 | return XFS_ERROR(EIO); |
| 2349 | |
| 2350 | namelen = VNAMELEN(dentry); |
| 2351 | |
| 2352 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
| 2353 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp, |
| 2354 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
| 2355 | name, NULL, 0, 0, 0); |
| 2356 | if (error) |
| 2357 | return error; |
| 2358 | } |
| 2359 | |
| 2360 | /* From this point on, return through std_return */ |
| 2361 | ip = NULL; |
| 2362 | |
| 2363 | /* |
| 2364 | * We need to get a reference to ip before we get our log |
| 2365 | * reservation. The reason for this is that we cannot call |
| 2366 | * xfs_iget for an inode for which we do not have a reference |
| 2367 | * once we've acquired a log reservation. This is because the |
| 2368 | * inode we are trying to get might be in xfs_inactive going |
| 2369 | * for a log reservation. Since we'll have to wait for the |
| 2370 | * inactive code to complete before returning from xfs_iget, |
| 2371 | * we need to make sure that we don't have log space reserved |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 2372 | * when we call xfs_iget. Instead we get an unlocked reference |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | * to the inode before getting our log reservation. |
| 2374 | */ |
| 2375 | error = xfs_get_dir_entry(dentry, &ip); |
| 2376 | if (error) { |
| 2377 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2378 | goto std_return; |
| 2379 | } |
| 2380 | |
| 2381 | dm_di_mode = ip->i_d.di_mode; |
| 2382 | |
| 2383 | vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
| 2384 | |
| 2385 | ITRACE(ip); |
| 2386 | |
| 2387 | error = XFS_QM_DQATTACH(mp, dp, 0); |
| 2388 | if (!error && dp != ip) |
| 2389 | error = XFS_QM_DQATTACH(mp, ip, 0); |
| 2390 | if (error) { |
| 2391 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2392 | IRELE(ip); |
| 2393 | goto std_return; |
| 2394 | } |
| 2395 | |
| 2396 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); |
| 2397 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 2398 | /* |
| 2399 | * We try to get the real space reservation first, |
| 2400 | * allowing for directory btree deletion(s) implying |
| 2401 | * possible bmap insert(s). If we can't get the space |
| 2402 | * reservation then we use 0 instead, and avoid the bmap |
| 2403 | * btree insert(s) in the directory code by, if the bmap |
| 2404 | * insert tries to happen, instead trimming the LAST |
| 2405 | * block from the directory. |
| 2406 | */ |
| 2407 | resblks = XFS_REMOVE_SPACE_RES(mp); |
| 2408 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
| 2409 | XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); |
| 2410 | if (error == ENOSPC) { |
| 2411 | resblks = 0; |
| 2412 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
| 2413 | XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); |
| 2414 | } |
| 2415 | if (error) { |
| 2416 | ASSERT(error != ENOSPC); |
| 2417 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2418 | xfs_trans_cancel(tp, 0); |
| 2419 | IRELE(ip); |
| 2420 | return error; |
| 2421 | } |
| 2422 | |
| 2423 | error = xfs_lock_dir_and_entry(dp, dentry, ip); |
| 2424 | if (error) { |
| 2425 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2426 | xfs_trans_cancel(tp, cancel_flags); |
| 2427 | IRELE(ip); |
| 2428 | goto std_return; |
| 2429 | } |
| 2430 | |
| 2431 | /* |
| 2432 | * At this point, we've gotten both the directory and the entry |
| 2433 | * inodes locked. |
| 2434 | */ |
| 2435 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 2436 | if (dp != ip) { |
| 2437 | /* |
| 2438 | * Increment vnode ref count only in this case since |
| 2439 | * there's an extra vnode reference in the case where |
| 2440 | * dp == ip. |
| 2441 | */ |
| 2442 | IHOLD(dp); |
| 2443 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 2444 | } |
| 2445 | |
| 2446 | /* |
| 2447 | * Entry must exist since we did a lookup in xfs_lock_dir_and_entry. |
| 2448 | */ |
| 2449 | XFS_BMAP_INIT(&free_list, &first_block); |
| 2450 | error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, ip->i_ino, |
| 2451 | &first_block, &free_list, 0); |
| 2452 | if (error) { |
| 2453 | ASSERT(error != ENOENT); |
| 2454 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2455 | goto error1; |
| 2456 | } |
| 2457 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 2458 | |
| 2459 | dp->i_gen++; |
| 2460 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 2461 | |
| 2462 | error = xfs_droplink(tp, ip); |
| 2463 | if (error) { |
| 2464 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2465 | goto error1; |
| 2466 | } |
| 2467 | |
| 2468 | /* Determine if this is the last link while |
| 2469 | * we are in the transaction. |
| 2470 | */ |
| 2471 | link_zero = (ip)->i_d.di_nlink==0; |
| 2472 | |
| 2473 | /* |
| 2474 | * Take an extra ref on the inode so that it doesn't |
| 2475 | * go to xfs_inactive() from within the commit. |
| 2476 | */ |
| 2477 | IHOLD(ip); |
| 2478 | |
| 2479 | /* |
| 2480 | * If this is a synchronous mount, make sure that the |
| 2481 | * remove transaction goes to disk before returning to |
| 2482 | * the user. |
| 2483 | */ |
| 2484 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 2485 | xfs_trans_set_sync(tp); |
| 2486 | } |
| 2487 | |
| 2488 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| 2489 | if (error) { |
| 2490 | REMOVE_DEBUG_TRACE(__LINE__); |
| 2491 | goto error_rele; |
| 2492 | } |
| 2493 | |
| 2494 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 2495 | if (error) { |
| 2496 | IRELE(ip); |
| 2497 | goto std_return; |
| 2498 | } |
| 2499 | |
| 2500 | /* |
| 2501 | * Before we drop our extra reference to the inode, purge it |
| 2502 | * from the refcache if it is there. By waiting until afterwards |
| 2503 | * to do the IRELE, we ensure that we won't go inactive in the |
| 2504 | * xfs_refcache_purge_ip routine (although that would be OK). |
| 2505 | */ |
| 2506 | xfs_refcache_purge_ip(ip); |
| 2507 | |
| 2508 | vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
| 2509 | |
| 2510 | /* |
| 2511 | * Let interposed file systems know about removed links. |
| 2512 | */ |
| 2513 | VOP_LINK_REMOVED(XFS_ITOV(ip), dir_vp, link_zero); |
| 2514 | |
| 2515 | IRELE(ip); |
| 2516 | |
| 2517 | /* Fall through to std_return with error = 0 */ |
| 2518 | std_return: |
| 2519 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, |
| 2520 | DM_EVENT_POSTREMOVE)) { |
| 2521 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, |
| 2522 | dir_vp, DM_RIGHT_NULL, |
| 2523 | NULL, DM_RIGHT_NULL, |
| 2524 | name, NULL, dm_di_mode, error, 0); |
| 2525 | } |
| 2526 | return error; |
| 2527 | |
| 2528 | error1: |
| 2529 | xfs_bmap_cancel(&free_list); |
| 2530 | cancel_flags |= XFS_TRANS_ABORT; |
| 2531 | xfs_trans_cancel(tp, cancel_flags); |
| 2532 | goto std_return; |
| 2533 | |
| 2534 | error_rele: |
| 2535 | /* |
| 2536 | * In this case make sure to not release the inode until after |
| 2537 | * the current transaction is aborted. Releasing it beforehand |
| 2538 | * can cause us to go to xfs_inactive and start a recursive |
| 2539 | * transaction which can easily deadlock with the current one. |
| 2540 | */ |
| 2541 | xfs_bmap_cancel(&free_list); |
| 2542 | cancel_flags |= XFS_TRANS_ABORT; |
| 2543 | xfs_trans_cancel(tp, cancel_flags); |
| 2544 | |
| 2545 | /* |
| 2546 | * Before we drop our extra reference to the inode, purge it |
| 2547 | * from the refcache if it is there. By waiting until afterwards |
| 2548 | * to do the IRELE, we ensure that we won't go inactive in the |
| 2549 | * xfs_refcache_purge_ip routine (although that would be OK). |
| 2550 | */ |
| 2551 | xfs_refcache_purge_ip(ip); |
| 2552 | |
| 2553 | IRELE(ip); |
| 2554 | |
| 2555 | goto std_return; |
| 2556 | } |
| 2557 | |
| 2558 | |
| 2559 | /* |
| 2560 | * xfs_link |
| 2561 | * |
| 2562 | */ |
| 2563 | STATIC int |
| 2564 | xfs_link( |
| 2565 | bhv_desc_t *target_dir_bdp, |
| 2566 | vnode_t *src_vp, |
| 2567 | vname_t *dentry, |
| 2568 | cred_t *credp) |
| 2569 | { |
| 2570 | xfs_inode_t *tdp, *sip; |
| 2571 | xfs_trans_t *tp; |
| 2572 | xfs_mount_t *mp; |
| 2573 | xfs_inode_t *ips[2]; |
| 2574 | int error; |
| 2575 | xfs_bmap_free_t free_list; |
| 2576 | xfs_fsblock_t first_block; |
| 2577 | int cancel_flags; |
| 2578 | int committed; |
| 2579 | vnode_t *target_dir_vp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | int resblks; |
| 2581 | char *target_name = VNAME(dentry); |
| 2582 | int target_namelen; |
| 2583 | |
| 2584 | target_dir_vp = BHV_TO_VNODE(target_dir_bdp); |
| 2585 | vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 2586 | vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address); |
| 2587 | |
| 2588 | target_namelen = VNAMELEN(dentry); |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 2589 | if (VN_ISDIR(src_vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | return XFS_ERROR(EPERM); |
| 2591 | |
Christoph Hellwig | 75e17b3 | 2006-01-11 20:58:44 +1100 | [diff] [blame] | 2592 | sip = xfs_vtoi(src_vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | tdp = XFS_BHVTOI(target_dir_bdp); |
| 2594 | mp = tdp->i_mount; |
| 2595 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 2596 | return XFS_ERROR(EIO); |
| 2597 | |
| 2598 | if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) { |
| 2599 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
| 2600 | target_dir_vp, DM_RIGHT_NULL, |
| 2601 | src_vp, DM_RIGHT_NULL, |
| 2602 | target_name, NULL, 0, 0, 0); |
| 2603 | if (error) |
| 2604 | return error; |
| 2605 | } |
| 2606 | |
| 2607 | /* Return through std_return after this point. */ |
| 2608 | |
| 2609 | error = XFS_QM_DQATTACH(mp, sip, 0); |
| 2610 | if (!error && sip != tdp) |
| 2611 | error = XFS_QM_DQATTACH(mp, tdp, 0); |
| 2612 | if (error) |
| 2613 | goto std_return; |
| 2614 | |
| 2615 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); |
| 2616 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 2617 | resblks = XFS_LINK_SPACE_RES(mp, target_namelen); |
| 2618 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
| 2619 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 2620 | if (error == ENOSPC) { |
| 2621 | resblks = 0; |
| 2622 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, |
| 2623 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| 2624 | } |
| 2625 | if (error) { |
| 2626 | cancel_flags = 0; |
| 2627 | goto error_return; |
| 2628 | } |
| 2629 | |
| 2630 | if (sip->i_ino < tdp->i_ino) { |
| 2631 | ips[0] = sip; |
| 2632 | ips[1] = tdp; |
| 2633 | } else { |
| 2634 | ips[0] = tdp; |
| 2635 | ips[1] = sip; |
| 2636 | } |
| 2637 | |
| 2638 | xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); |
| 2639 | |
| 2640 | /* |
| 2641 | * Increment vnode ref counts since xfs_trans_commit & |
| 2642 | * xfs_trans_cancel will both unlock the inodes and |
| 2643 | * decrement the associated ref counts. |
| 2644 | */ |
| 2645 | VN_HOLD(src_vp); |
| 2646 | VN_HOLD(target_dir_vp); |
| 2647 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
| 2648 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); |
| 2649 | |
| 2650 | /* |
| 2651 | * If the source has too many links, we can't make any more to it. |
| 2652 | */ |
| 2653 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { |
| 2654 | error = XFS_ERROR(EMLINK); |
| 2655 | goto error_return; |
| 2656 | } |
| 2657 | |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 2658 | /* |
| 2659 | * If we are using project inheritance, we only allow hard link |
| 2660 | * creation in our tree when the project IDs are the same; else |
| 2661 | * the tree quota mechanism could be circumvented. |
| 2662 | */ |
| 2663 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
| 2664 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { |
Nathan Scott | b1ecdda | 2006-05-08 19:51:42 +1000 | [diff] [blame] | 2665 | error = XFS_ERROR(EXDEV); |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 2666 | goto error_return; |
| 2667 | } |
| 2668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | if (resblks == 0 && |
| 2670 | (error = XFS_DIR_CANENTER(mp, tp, tdp, target_name, |
| 2671 | target_namelen))) |
| 2672 | goto error_return; |
| 2673 | |
| 2674 | XFS_BMAP_INIT(&free_list, &first_block); |
| 2675 | |
| 2676 | error = XFS_DIR_CREATENAME(mp, tp, tdp, target_name, target_namelen, |
| 2677 | sip->i_ino, &first_block, &free_list, |
| 2678 | resblks); |
| 2679 | if (error) |
| 2680 | goto abort_return; |
| 2681 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 2682 | tdp->i_gen++; |
| 2683 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
| 2684 | |
| 2685 | error = xfs_bumplink(tp, sip); |
| 2686 | if (error) { |
| 2687 | goto abort_return; |
| 2688 | } |
| 2689 | |
| 2690 | /* |
| 2691 | * If this is a synchronous mount, make sure that the |
| 2692 | * link transaction goes to disk before returning to |
| 2693 | * the user. |
| 2694 | */ |
| 2695 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 2696 | xfs_trans_set_sync(tp); |
| 2697 | } |
| 2698 | |
| 2699 | error = xfs_bmap_finish (&tp, &free_list, first_block, &committed); |
| 2700 | if (error) { |
| 2701 | xfs_bmap_cancel(&free_list); |
| 2702 | goto abort_return; |
| 2703 | } |
| 2704 | |
| 2705 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 2706 | if (error) { |
| 2707 | goto std_return; |
| 2708 | } |
| 2709 | |
| 2710 | /* Fall through to std_return with error = 0. */ |
| 2711 | std_return: |
| 2712 | if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip, |
| 2713 | DM_EVENT_POSTLINK)) { |
| 2714 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
| 2715 | target_dir_vp, DM_RIGHT_NULL, |
| 2716 | src_vp, DM_RIGHT_NULL, |
| 2717 | target_name, NULL, 0, error, 0); |
| 2718 | } |
| 2719 | return error; |
| 2720 | |
| 2721 | abort_return: |
| 2722 | cancel_flags |= XFS_TRANS_ABORT; |
| 2723 | /* FALLTHROUGH */ |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2725 | error_return: |
| 2726 | xfs_trans_cancel(tp, cancel_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2727 | goto std_return; |
| 2728 | } |
| 2729 | /* |
| 2730 | * xfs_mkdir |
| 2731 | * |
| 2732 | */ |
| 2733 | STATIC int |
| 2734 | xfs_mkdir( |
| 2735 | bhv_desc_t *dir_bdp, |
| 2736 | vname_t *dentry, |
| 2737 | vattr_t *vap, |
| 2738 | vnode_t **vpp, |
| 2739 | cred_t *credp) |
| 2740 | { |
| 2741 | char *dir_name = VNAME(dentry); |
| 2742 | xfs_inode_t *dp; |
| 2743 | xfs_inode_t *cdp; /* inode of created dir */ |
| 2744 | vnode_t *cvp; /* vnode of created dir */ |
| 2745 | xfs_trans_t *tp; |
| 2746 | xfs_mount_t *mp; |
| 2747 | int cancel_flags; |
| 2748 | int error; |
| 2749 | int committed; |
| 2750 | xfs_bmap_free_t free_list; |
| 2751 | xfs_fsblock_t first_block; |
| 2752 | vnode_t *dir_vp; |
| 2753 | boolean_t dp_joined_to_trans; |
| 2754 | boolean_t created = B_FALSE; |
| 2755 | int dm_event_sent = 0; |
| 2756 | xfs_prid_t prid; |
| 2757 | struct xfs_dquot *udqp, *gdqp; |
| 2758 | uint resblks; |
| 2759 | int dm_di_mode; |
| 2760 | int dir_namelen; |
| 2761 | |
| 2762 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 2763 | dp = XFS_BHVTOI(dir_bdp); |
| 2764 | mp = dp->i_mount; |
| 2765 | |
| 2766 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 2767 | return XFS_ERROR(EIO); |
| 2768 | |
| 2769 | dir_namelen = VNAMELEN(dentry); |
| 2770 | |
| 2771 | tp = NULL; |
| 2772 | dp_joined_to_trans = B_FALSE; |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 2773 | dm_di_mode = vap->va_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | |
| 2775 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { |
| 2776 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
| 2777 | dir_vp, DM_RIGHT_NULL, NULL, |
| 2778 | DM_RIGHT_NULL, dir_name, NULL, |
| 2779 | dm_di_mode, 0, 0); |
| 2780 | if (error) |
| 2781 | return error; |
| 2782 | dm_event_sent = 1; |
| 2783 | } |
| 2784 | |
| 2785 | /* Return through std_return after this point. */ |
| 2786 | |
| 2787 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 2788 | |
| 2789 | mp = dp->i_mount; |
| 2790 | udqp = gdqp = NULL; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 2791 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 2792 | prid = dp->i_d.di_projid; |
| 2793 | else if (vap->va_mask & XFS_AT_PROJID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | prid = (xfs_prid_t)vap->va_projid; |
| 2795 | else |
| 2796 | prid = (xfs_prid_t)dfltprid; |
| 2797 | |
| 2798 | /* |
| 2799 | * Make sure that we have allocated dquot(s) on disk. |
| 2800 | */ |
| 2801 | error = XFS_QM_DQVOPALLOC(mp, dp, |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 2802 | current_fsuid(credp), current_fsgid(credp), prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| 2804 | if (error) |
| 2805 | goto std_return; |
| 2806 | |
| 2807 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); |
| 2808 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 2809 | resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen); |
| 2810 | error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0, |
| 2811 | XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT); |
| 2812 | if (error == ENOSPC) { |
| 2813 | resblks = 0; |
| 2814 | error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0, |
| 2815 | XFS_TRANS_PERM_LOG_RES, |
| 2816 | XFS_MKDIR_LOG_COUNT); |
| 2817 | } |
| 2818 | if (error) { |
| 2819 | cancel_flags = 0; |
| 2820 | dp = NULL; |
| 2821 | goto error_return; |
| 2822 | } |
| 2823 | |
| 2824 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 2825 | |
| 2826 | /* |
| 2827 | * Check for directory link count overflow. |
| 2828 | */ |
| 2829 | if (dp->i_d.di_nlink >= XFS_MAXLINK) { |
| 2830 | error = XFS_ERROR(EMLINK); |
| 2831 | goto error_return; |
| 2832 | } |
| 2833 | |
| 2834 | /* |
| 2835 | * Reserve disk quota and the inode. |
| 2836 | */ |
| 2837 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| 2838 | if (error) |
| 2839 | goto error_return; |
| 2840 | |
| 2841 | if (resblks == 0 && |
| 2842 | (error = XFS_DIR_CANENTER(mp, tp, dp, dir_name, dir_namelen))) |
| 2843 | goto error_return; |
| 2844 | /* |
| 2845 | * create the directory inode. |
| 2846 | */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 2847 | error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | 0, credp, prid, resblks > 0, |
| 2849 | &cdp, NULL); |
| 2850 | if (error) { |
| 2851 | if (error == ENOSPC) |
| 2852 | goto error_return; |
| 2853 | goto abort_return; |
| 2854 | } |
| 2855 | ITRACE(cdp); |
| 2856 | |
| 2857 | /* |
| 2858 | * Now we add the directory inode to the transaction. |
| 2859 | * We waited until now since xfs_dir_ialloc might start |
| 2860 | * a new transaction. Had we joined the transaction |
| 2861 | * earlier, the locks might have gotten released. |
| 2862 | */ |
| 2863 | VN_HOLD(dir_vp); |
| 2864 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 2865 | dp_joined_to_trans = B_TRUE; |
| 2866 | |
| 2867 | XFS_BMAP_INIT(&free_list, &first_block); |
| 2868 | |
| 2869 | error = XFS_DIR_CREATENAME(mp, tp, dp, dir_name, dir_namelen, |
| 2870 | cdp->i_ino, &first_block, &free_list, |
| 2871 | resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
| 2872 | if (error) { |
| 2873 | ASSERT(error != ENOSPC); |
| 2874 | goto error1; |
| 2875 | } |
| 2876 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 2877 | |
| 2878 | /* |
| 2879 | * Bump the in memory version number of the parent directory |
| 2880 | * so that other processes accessing it will recognize that |
| 2881 | * the directory has changed. |
| 2882 | */ |
| 2883 | dp->i_gen++; |
| 2884 | |
| 2885 | error = XFS_DIR_INIT(mp, tp, cdp, dp); |
| 2886 | if (error) { |
| 2887 | goto error2; |
| 2888 | } |
| 2889 | |
| 2890 | cdp->i_gen = 1; |
| 2891 | error = xfs_bumplink(tp, dp); |
| 2892 | if (error) { |
| 2893 | goto error2; |
| 2894 | } |
| 2895 | |
| 2896 | cvp = XFS_ITOV(cdp); |
| 2897 | |
| 2898 | created = B_TRUE; |
| 2899 | |
| 2900 | *vpp = cvp; |
| 2901 | IHOLD(cdp); |
| 2902 | |
| 2903 | /* |
| 2904 | * Attach the dquots to the new inode and modify the icount incore. |
| 2905 | */ |
| 2906 | XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp); |
| 2907 | |
| 2908 | /* |
| 2909 | * If this is a synchronous mount, make sure that the |
| 2910 | * mkdir transaction goes to disk before returning to |
| 2911 | * the user. |
| 2912 | */ |
| 2913 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 2914 | xfs_trans_set_sync(tp); |
| 2915 | } |
| 2916 | |
| 2917 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| 2918 | if (error) { |
| 2919 | IRELE(cdp); |
| 2920 | goto error2; |
| 2921 | } |
| 2922 | |
| 2923 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 2924 | XFS_QM_DQRELE(mp, udqp); |
| 2925 | XFS_QM_DQRELE(mp, gdqp); |
| 2926 | if (error) { |
| 2927 | IRELE(cdp); |
| 2928 | } |
| 2929 | |
| 2930 | /* Fall through to std_return with error = 0 or errno from |
| 2931 | * xfs_trans_commit. */ |
| 2932 | |
| 2933 | std_return: |
| 2934 | if ( (created || (error != 0 && dm_event_sent != 0)) && |
| 2935 | DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| 2936 | DM_EVENT_POSTCREATE)) { |
| 2937 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
| 2938 | dir_vp, DM_RIGHT_NULL, |
| 2939 | created ? XFS_ITOV(cdp):NULL, |
| 2940 | DM_RIGHT_NULL, |
| 2941 | dir_name, NULL, |
| 2942 | dm_di_mode, error, 0); |
| 2943 | } |
| 2944 | return error; |
| 2945 | |
| 2946 | error2: |
| 2947 | error1: |
| 2948 | xfs_bmap_cancel(&free_list); |
| 2949 | abort_return: |
| 2950 | cancel_flags |= XFS_TRANS_ABORT; |
| 2951 | error_return: |
| 2952 | xfs_trans_cancel(tp, cancel_flags); |
| 2953 | XFS_QM_DQRELE(mp, udqp); |
| 2954 | XFS_QM_DQRELE(mp, gdqp); |
| 2955 | |
| 2956 | if (!dp_joined_to_trans && (dp != NULL)) { |
| 2957 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 2958 | } |
| 2959 | |
| 2960 | goto std_return; |
| 2961 | } |
| 2962 | |
| 2963 | |
| 2964 | /* |
| 2965 | * xfs_rmdir |
| 2966 | * |
| 2967 | */ |
| 2968 | STATIC int |
| 2969 | xfs_rmdir( |
| 2970 | bhv_desc_t *dir_bdp, |
| 2971 | vname_t *dentry, |
| 2972 | cred_t *credp) |
| 2973 | { |
| 2974 | char *name = VNAME(dentry); |
| 2975 | xfs_inode_t *dp; |
| 2976 | xfs_inode_t *cdp; /* child directory */ |
| 2977 | xfs_trans_t *tp; |
| 2978 | xfs_mount_t *mp; |
| 2979 | int error; |
| 2980 | xfs_bmap_free_t free_list; |
| 2981 | xfs_fsblock_t first_block; |
| 2982 | int cancel_flags; |
| 2983 | int committed; |
| 2984 | vnode_t *dir_vp; |
| 2985 | int dm_di_mode = 0; |
| 2986 | int last_cdp_link; |
| 2987 | int namelen; |
| 2988 | uint resblks; |
| 2989 | |
| 2990 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 2991 | dp = XFS_BHVTOI(dir_bdp); |
| 2992 | mp = dp->i_mount; |
| 2993 | |
| 2994 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 2995 | |
| 2996 | if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount)) |
| 2997 | return XFS_ERROR(EIO); |
| 2998 | namelen = VNAMELEN(dentry); |
| 2999 | |
| 3000 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
| 3001 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, |
| 3002 | dir_vp, DM_RIGHT_NULL, |
| 3003 | NULL, DM_RIGHT_NULL, |
| 3004 | name, NULL, 0, 0, 0); |
| 3005 | if (error) |
| 3006 | return XFS_ERROR(error); |
| 3007 | } |
| 3008 | |
| 3009 | /* Return through std_return after this point. */ |
| 3010 | |
| 3011 | cdp = NULL; |
| 3012 | |
| 3013 | /* |
| 3014 | * We need to get a reference to cdp before we get our log |
| 3015 | * reservation. The reason for this is that we cannot call |
| 3016 | * xfs_iget for an inode for which we do not have a reference |
| 3017 | * once we've acquired a log reservation. This is because the |
| 3018 | * inode we are trying to get might be in xfs_inactive going |
| 3019 | * for a log reservation. Since we'll have to wait for the |
| 3020 | * inactive code to complete before returning from xfs_iget, |
| 3021 | * we need to make sure that we don't have log space reserved |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3022 | * when we call xfs_iget. Instead we get an unlocked reference |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | * to the inode before getting our log reservation. |
| 3024 | */ |
| 3025 | error = xfs_get_dir_entry(dentry, &cdp); |
| 3026 | if (error) { |
| 3027 | REMOVE_DEBUG_TRACE(__LINE__); |
| 3028 | goto std_return; |
| 3029 | } |
| 3030 | mp = dp->i_mount; |
| 3031 | dm_di_mode = cdp->i_d.di_mode; |
| 3032 | |
| 3033 | /* |
| 3034 | * Get the dquots for the inodes. |
| 3035 | */ |
| 3036 | error = XFS_QM_DQATTACH(mp, dp, 0); |
| 3037 | if (!error && dp != cdp) |
| 3038 | error = XFS_QM_DQATTACH(mp, cdp, 0); |
| 3039 | if (error) { |
| 3040 | IRELE(cdp); |
| 3041 | REMOVE_DEBUG_TRACE(__LINE__); |
| 3042 | goto std_return; |
| 3043 | } |
| 3044 | |
| 3045 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); |
| 3046 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 3047 | /* |
| 3048 | * We try to get the real space reservation first, |
| 3049 | * allowing for directory btree deletion(s) implying |
| 3050 | * possible bmap insert(s). If we can't get the space |
| 3051 | * reservation then we use 0 instead, and avoid the bmap |
| 3052 | * btree insert(s) in the directory code by, if the bmap |
| 3053 | * insert tries to happen, instead trimming the LAST |
| 3054 | * block from the directory. |
| 3055 | */ |
| 3056 | resblks = XFS_REMOVE_SPACE_RES(mp); |
| 3057 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
| 3058 | XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); |
| 3059 | if (error == ENOSPC) { |
| 3060 | resblks = 0; |
| 3061 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
| 3062 | XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); |
| 3063 | } |
| 3064 | if (error) { |
| 3065 | ASSERT(error != ENOSPC); |
| 3066 | cancel_flags = 0; |
| 3067 | IRELE(cdp); |
| 3068 | goto error_return; |
| 3069 | } |
| 3070 | XFS_BMAP_INIT(&free_list, &first_block); |
| 3071 | |
| 3072 | /* |
| 3073 | * Now lock the child directory inode and the parent directory |
| 3074 | * inode in the proper order. This will take care of validating |
| 3075 | * that the directory entry for the child directory inode has |
| 3076 | * not changed while we were obtaining a log reservation. |
| 3077 | */ |
| 3078 | error = xfs_lock_dir_and_entry(dp, dentry, cdp); |
| 3079 | if (error) { |
| 3080 | xfs_trans_cancel(tp, cancel_flags); |
| 3081 | IRELE(cdp); |
| 3082 | goto std_return; |
| 3083 | } |
| 3084 | |
| 3085 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 3086 | if (dp != cdp) { |
| 3087 | /* |
| 3088 | * Only increment the parent directory vnode count if |
| 3089 | * we didn't bump it in looking up cdp. The only time |
| 3090 | * we don't bump it is when we're looking up ".". |
| 3091 | */ |
| 3092 | VN_HOLD(dir_vp); |
| 3093 | } |
| 3094 | |
| 3095 | ITRACE(cdp); |
| 3096 | xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); |
| 3097 | |
| 3098 | ASSERT(cdp->i_d.di_nlink >= 2); |
| 3099 | if (cdp->i_d.di_nlink != 2) { |
| 3100 | error = XFS_ERROR(ENOTEMPTY); |
| 3101 | goto error_return; |
| 3102 | } |
| 3103 | if (!XFS_DIR_ISEMPTY(mp, cdp)) { |
| 3104 | error = XFS_ERROR(ENOTEMPTY); |
| 3105 | goto error_return; |
| 3106 | } |
| 3107 | |
| 3108 | error = XFS_DIR_REMOVENAME(mp, tp, dp, name, namelen, cdp->i_ino, |
| 3109 | &first_block, &free_list, resblks); |
| 3110 | if (error) { |
| 3111 | goto error1; |
| 3112 | } |
| 3113 | |
| 3114 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 3115 | |
| 3116 | /* |
| 3117 | * Bump the in memory generation count on the parent |
| 3118 | * directory so that other can know that it has changed. |
| 3119 | */ |
| 3120 | dp->i_gen++; |
| 3121 | |
| 3122 | /* |
| 3123 | * Drop the link from cdp's "..". |
| 3124 | */ |
| 3125 | error = xfs_droplink(tp, dp); |
| 3126 | if (error) { |
| 3127 | goto error1; |
| 3128 | } |
| 3129 | |
| 3130 | /* |
| 3131 | * Drop the link from dp to cdp. |
| 3132 | */ |
| 3133 | error = xfs_droplink(tp, cdp); |
| 3134 | if (error) { |
| 3135 | goto error1; |
| 3136 | } |
| 3137 | |
| 3138 | /* |
| 3139 | * Drop the "." link from cdp to self. |
| 3140 | */ |
| 3141 | error = xfs_droplink(tp, cdp); |
| 3142 | if (error) { |
| 3143 | goto error1; |
| 3144 | } |
| 3145 | |
| 3146 | /* Determine these before committing transaction */ |
| 3147 | last_cdp_link = (cdp)->i_d.di_nlink==0; |
| 3148 | |
| 3149 | /* |
| 3150 | * Take an extra ref on the child vnode so that it |
| 3151 | * does not go to xfs_inactive() from within the commit. |
| 3152 | */ |
| 3153 | IHOLD(cdp); |
| 3154 | |
| 3155 | /* |
| 3156 | * If this is a synchronous mount, make sure that the |
| 3157 | * rmdir transaction goes to disk before returning to |
| 3158 | * the user. |
| 3159 | */ |
| 3160 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 3161 | xfs_trans_set_sync(tp); |
| 3162 | } |
| 3163 | |
| 3164 | error = xfs_bmap_finish (&tp, &free_list, first_block, &committed); |
| 3165 | if (error) { |
| 3166 | xfs_bmap_cancel(&free_list); |
| 3167 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | |
| 3168 | XFS_TRANS_ABORT)); |
| 3169 | IRELE(cdp); |
| 3170 | goto std_return; |
| 3171 | } |
| 3172 | |
| 3173 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 3174 | if (error) { |
| 3175 | IRELE(cdp); |
| 3176 | goto std_return; |
| 3177 | } |
| 3178 | |
| 3179 | |
| 3180 | /* |
| 3181 | * Let interposed file systems know about removed links. |
| 3182 | */ |
| 3183 | VOP_LINK_REMOVED(XFS_ITOV(cdp), dir_vp, last_cdp_link); |
| 3184 | |
| 3185 | IRELE(cdp); |
| 3186 | |
| 3187 | /* Fall through to std_return with error = 0 or the errno |
| 3188 | * from xfs_trans_commit. */ |
Nathan Scott | bb19fba | 2006-03-22 14:12:12 +1100 | [diff] [blame] | 3189 | std_return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3190 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) { |
| 3191 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, |
| 3192 | dir_vp, DM_RIGHT_NULL, |
| 3193 | NULL, DM_RIGHT_NULL, |
| 3194 | name, NULL, dm_di_mode, |
| 3195 | error, 0); |
| 3196 | } |
| 3197 | return error; |
| 3198 | |
Nathan Scott | bb19fba | 2006-03-22 14:12:12 +1100 | [diff] [blame] | 3199 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3200 | xfs_bmap_cancel(&free_list); |
| 3201 | cancel_flags |= XFS_TRANS_ABORT; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3202 | /* FALLTHROUGH */ |
| 3203 | |
Nathan Scott | bb19fba | 2006-03-22 14:12:12 +1100 | [diff] [blame] | 3204 | error_return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3205 | xfs_trans_cancel(tp, cancel_flags); |
| 3206 | goto std_return; |
| 3207 | } |
| 3208 | |
| 3209 | |
| 3210 | /* |
| 3211 | * xfs_readdir |
| 3212 | * |
| 3213 | * Read dp's entries starting at uiop->uio_offset and translate them into |
| 3214 | * bufsize bytes worth of struct dirents starting at bufbase. |
| 3215 | */ |
| 3216 | STATIC int |
| 3217 | xfs_readdir( |
| 3218 | bhv_desc_t *dir_bdp, |
| 3219 | uio_t *uiop, |
| 3220 | cred_t *credp, |
| 3221 | int *eofp) |
| 3222 | { |
| 3223 | xfs_inode_t *dp; |
| 3224 | xfs_trans_t *tp = NULL; |
| 3225 | int error = 0; |
| 3226 | uint lock_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | |
| 3228 | vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__, |
| 3229 | (inst_t *)__return_address); |
| 3230 | dp = XFS_BHVTOI(dir_bdp); |
| 3231 | |
| 3232 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) { |
| 3233 | return XFS_ERROR(EIO); |
| 3234 | } |
| 3235 | |
| 3236 | lock_mode = xfs_ilock_map_shared(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | error = XFS_DIR_GETDENTS(dp->i_mount, tp, dp, uiop, eofp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3238 | xfs_iunlock_map_shared(dp, lock_mode); |
| 3239 | return error; |
| 3240 | } |
| 3241 | |
| 3242 | |
| 3243 | /* |
| 3244 | * xfs_symlink |
| 3245 | * |
| 3246 | */ |
| 3247 | STATIC int |
| 3248 | xfs_symlink( |
| 3249 | bhv_desc_t *dir_bdp, |
| 3250 | vname_t *dentry, |
| 3251 | vattr_t *vap, |
| 3252 | char *target_path, |
| 3253 | vnode_t **vpp, |
| 3254 | cred_t *credp) |
| 3255 | { |
| 3256 | xfs_trans_t *tp; |
| 3257 | xfs_mount_t *mp; |
| 3258 | xfs_inode_t *dp; |
| 3259 | xfs_inode_t *ip; |
| 3260 | int error; |
| 3261 | int pathlen; |
| 3262 | xfs_bmap_free_t free_list; |
| 3263 | xfs_fsblock_t first_block; |
| 3264 | boolean_t dp_joined_to_trans; |
| 3265 | vnode_t *dir_vp; |
| 3266 | uint cancel_flags; |
| 3267 | int committed; |
| 3268 | xfs_fileoff_t first_fsb; |
| 3269 | xfs_filblks_t fs_blocks; |
| 3270 | int nmaps; |
| 3271 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| 3272 | xfs_daddr_t d; |
| 3273 | char *cur_chunk; |
| 3274 | int byte_cnt; |
| 3275 | int n; |
| 3276 | xfs_buf_t *bp; |
| 3277 | xfs_prid_t prid; |
| 3278 | struct xfs_dquot *udqp, *gdqp; |
| 3279 | uint resblks; |
| 3280 | char *link_name = VNAME(dentry); |
| 3281 | int link_namelen; |
| 3282 | |
| 3283 | *vpp = NULL; |
| 3284 | dir_vp = BHV_TO_VNODE(dir_bdp); |
| 3285 | dp = XFS_BHVTOI(dir_bdp); |
| 3286 | dp_joined_to_trans = B_FALSE; |
| 3287 | error = 0; |
| 3288 | ip = NULL; |
| 3289 | tp = NULL; |
| 3290 | |
| 3291 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| 3292 | |
| 3293 | mp = dp->i_mount; |
| 3294 | |
| 3295 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 3296 | return XFS_ERROR(EIO); |
| 3297 | |
| 3298 | link_namelen = VNAMELEN(dentry); |
| 3299 | |
| 3300 | /* |
| 3301 | * Check component lengths of the target path name. |
| 3302 | */ |
| 3303 | pathlen = strlen(target_path); |
| 3304 | if (pathlen >= MAXPATHLEN) /* total string too long */ |
| 3305 | return XFS_ERROR(ENAMETOOLONG); |
| 3306 | if (pathlen >= MAXNAMELEN) { /* is any component too long? */ |
| 3307 | int len, total; |
| 3308 | char *path; |
| 3309 | |
| 3310 | for(total = 0, path = target_path; total < pathlen;) { |
| 3311 | /* |
| 3312 | * Skip any slashes. |
| 3313 | */ |
| 3314 | while(*path == '/') { |
| 3315 | total++; |
| 3316 | path++; |
| 3317 | } |
| 3318 | |
| 3319 | /* |
| 3320 | * Count up to the next slash or end of path. |
| 3321 | * Error out if the component is bigger than MAXNAMELEN. |
| 3322 | */ |
| 3323 | for(len = 0; *path != '/' && total < pathlen;total++, path++) { |
| 3324 | if (++len >= MAXNAMELEN) { |
| 3325 | error = ENAMETOOLONG; |
| 3326 | return error; |
| 3327 | } |
| 3328 | } |
| 3329 | } |
| 3330 | } |
| 3331 | |
| 3332 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) { |
| 3333 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp, |
| 3334 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
| 3335 | link_name, target_path, 0, 0, 0); |
| 3336 | if (error) |
| 3337 | return error; |
| 3338 | } |
| 3339 | |
| 3340 | /* Return through std_return after this point. */ |
| 3341 | |
| 3342 | udqp = gdqp = NULL; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 3343 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 3344 | prid = dp->i_d.di_projid; |
| 3345 | else if (vap->va_mask & XFS_AT_PROJID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | prid = (xfs_prid_t)vap->va_projid; |
| 3347 | else |
| 3348 | prid = (xfs_prid_t)dfltprid; |
| 3349 | |
| 3350 | /* |
| 3351 | * Make sure that we have allocated dquot(s) on disk. |
| 3352 | */ |
| 3353 | error = XFS_QM_DQVOPALLOC(mp, dp, |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 3354 | current_fsuid(credp), current_fsgid(credp), prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3355 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| 3356 | if (error) |
| 3357 | goto std_return; |
| 3358 | |
| 3359 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); |
| 3360 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 3361 | /* |
| 3362 | * The symlink will fit into the inode data fork? |
| 3363 | * There can't be any attributes so we get the whole variable part. |
| 3364 | */ |
| 3365 | if (pathlen <= XFS_LITINO(mp)) |
| 3366 | fs_blocks = 0; |
| 3367 | else |
| 3368 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); |
| 3369 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks); |
| 3370 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
| 3371 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 3372 | if (error == ENOSPC && fs_blocks == 0) { |
| 3373 | resblks = 0; |
| 3374 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, |
| 3375 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| 3376 | } |
| 3377 | if (error) { |
| 3378 | cancel_flags = 0; |
| 3379 | dp = NULL; |
| 3380 | goto error_return; |
| 3381 | } |
| 3382 | |
| 3383 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 3384 | |
| 3385 | /* |
| 3386 | * Check whether the directory allows new symlinks or not. |
| 3387 | */ |
| 3388 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { |
| 3389 | error = XFS_ERROR(EPERM); |
| 3390 | goto error_return; |
| 3391 | } |
| 3392 | |
| 3393 | /* |
| 3394 | * Reserve disk quota : blocks and inode. |
| 3395 | */ |
| 3396 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| 3397 | if (error) |
| 3398 | goto error_return; |
| 3399 | |
| 3400 | /* |
| 3401 | * Check for ability to enter directory entry, if no space reserved. |
| 3402 | */ |
| 3403 | if (resblks == 0 && |
| 3404 | (error = XFS_DIR_CANENTER(mp, tp, dp, link_name, link_namelen))) |
| 3405 | goto error_return; |
| 3406 | /* |
| 3407 | * Initialize the bmap freelist prior to calling either |
| 3408 | * bmapi or the directory create code. |
| 3409 | */ |
| 3410 | XFS_BMAP_INIT(&free_list, &first_block); |
| 3411 | |
| 3412 | /* |
| 3413 | * Allocate an inode for the symlink. |
| 3414 | */ |
| 3415 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT), |
| 3416 | 1, 0, credp, prid, resblks > 0, &ip, NULL); |
| 3417 | if (error) { |
| 3418 | if (error == ENOSPC) |
| 3419 | goto error_return; |
| 3420 | goto error1; |
| 3421 | } |
| 3422 | ITRACE(ip); |
| 3423 | |
| 3424 | VN_HOLD(dir_vp); |
| 3425 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| 3426 | dp_joined_to_trans = B_TRUE; |
| 3427 | |
| 3428 | /* |
| 3429 | * Also attach the dquot(s) to it, if applicable. |
| 3430 | */ |
| 3431 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); |
| 3432 | |
| 3433 | if (resblks) |
| 3434 | resblks -= XFS_IALLOC_SPACE_RES(mp); |
| 3435 | /* |
| 3436 | * If the symlink will fit into the inode, write it inline. |
| 3437 | */ |
| 3438 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { |
| 3439 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); |
| 3440 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); |
| 3441 | ip->i_d.di_size = pathlen; |
| 3442 | |
| 3443 | /* |
| 3444 | * The inode was initially created in extent format. |
| 3445 | */ |
| 3446 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); |
| 3447 | ip->i_df.if_flags |= XFS_IFINLINE; |
| 3448 | |
| 3449 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
| 3450 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
| 3451 | |
| 3452 | } else { |
| 3453 | first_fsb = 0; |
| 3454 | nmaps = SYMLINK_MAPS; |
| 3455 | |
| 3456 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, |
| 3457 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, |
| 3458 | &first_block, resblks, mval, &nmaps, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 3459 | &free_list, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | if (error) { |
| 3461 | goto error1; |
| 3462 | } |
| 3463 | |
| 3464 | if (resblks) |
| 3465 | resblks -= fs_blocks; |
| 3466 | ip->i_d.di_size = pathlen; |
| 3467 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 3468 | |
| 3469 | cur_chunk = target_path; |
| 3470 | for (n = 0; n < nmaps; n++) { |
| 3471 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| 3472 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| 3473 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
| 3474 | BTOBB(byte_cnt), 0); |
| 3475 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); |
| 3476 | if (pathlen < byte_cnt) { |
| 3477 | byte_cnt = pathlen; |
| 3478 | } |
| 3479 | pathlen -= byte_cnt; |
| 3480 | |
| 3481 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); |
| 3482 | cur_chunk += byte_cnt; |
| 3483 | |
| 3484 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); |
| 3485 | } |
| 3486 | } |
| 3487 | |
| 3488 | /* |
| 3489 | * Create the directory entry for the symlink. |
| 3490 | */ |
| 3491 | error = XFS_DIR_CREATENAME(mp, tp, dp, link_name, link_namelen, |
| 3492 | ip->i_ino, &first_block, &free_list, resblks); |
| 3493 | if (error) { |
| 3494 | goto error1; |
| 3495 | } |
| 3496 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 3497 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 3498 | |
| 3499 | /* |
| 3500 | * Bump the in memory version number of the parent directory |
| 3501 | * so that other processes accessing it will recognize that |
| 3502 | * the directory has changed. |
| 3503 | */ |
| 3504 | dp->i_gen++; |
| 3505 | |
| 3506 | /* |
| 3507 | * If this is a synchronous mount, make sure that the |
| 3508 | * symlink transaction goes to disk before returning to |
| 3509 | * the user. |
| 3510 | */ |
| 3511 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| 3512 | xfs_trans_set_sync(tp); |
| 3513 | } |
| 3514 | |
| 3515 | /* |
| 3516 | * xfs_trans_commit normally decrements the vnode ref count |
| 3517 | * when it unlocks the inode. Since we want to return the |
| 3518 | * vnode to the caller, we bump the vnode ref count now. |
| 3519 | */ |
| 3520 | IHOLD(ip); |
| 3521 | |
| 3522 | error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| 3523 | if (error) { |
| 3524 | goto error2; |
| 3525 | } |
| 3526 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 3527 | XFS_QM_DQRELE(mp, udqp); |
| 3528 | XFS_QM_DQRELE(mp, gdqp); |
| 3529 | |
| 3530 | /* Fall through to std_return with error = 0 or errno from |
| 3531 | * xfs_trans_commit */ |
| 3532 | std_return: |
| 3533 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| 3534 | DM_EVENT_POSTSYMLINK)) { |
| 3535 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
| 3536 | dir_vp, DM_RIGHT_NULL, |
| 3537 | error ? NULL : XFS_ITOV(ip), |
| 3538 | DM_RIGHT_NULL, link_name, target_path, |
| 3539 | 0, error, 0); |
| 3540 | } |
| 3541 | |
| 3542 | if (!error) { |
| 3543 | vnode_t *vp; |
| 3544 | |
| 3545 | ASSERT(ip); |
| 3546 | vp = XFS_ITOV(ip); |
| 3547 | *vpp = vp; |
| 3548 | } |
| 3549 | return error; |
| 3550 | |
| 3551 | error2: |
| 3552 | IRELE(ip); |
| 3553 | error1: |
| 3554 | xfs_bmap_cancel(&free_list); |
| 3555 | cancel_flags |= XFS_TRANS_ABORT; |
| 3556 | error_return: |
| 3557 | xfs_trans_cancel(tp, cancel_flags); |
| 3558 | XFS_QM_DQRELE(mp, udqp); |
| 3559 | XFS_QM_DQRELE(mp, gdqp); |
| 3560 | |
| 3561 | if (!dp_joined_to_trans && (dp != NULL)) { |
| 3562 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 3563 | } |
| 3564 | |
| 3565 | goto std_return; |
| 3566 | } |
| 3567 | |
| 3568 | |
| 3569 | /* |
| 3570 | * xfs_fid2 |
| 3571 | * |
| 3572 | * A fid routine that takes a pointer to a previously allocated |
| 3573 | * fid structure (like xfs_fast_fid) but uses a 64 bit inode number. |
| 3574 | */ |
| 3575 | STATIC int |
| 3576 | xfs_fid2( |
| 3577 | bhv_desc_t *bdp, |
| 3578 | fid_t *fidp) |
| 3579 | { |
| 3580 | xfs_inode_t *ip; |
| 3581 | xfs_fid2_t *xfid; |
| 3582 | |
| 3583 | vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, |
| 3584 | (inst_t *)__return_address); |
| 3585 | ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t)); |
| 3586 | |
| 3587 | xfid = (xfs_fid2_t *)fidp; |
| 3588 | ip = XFS_BHVTOI(bdp); |
| 3589 | xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len); |
| 3590 | xfid->fid_pad = 0; |
| 3591 | /* |
| 3592 | * use memcpy because the inode is a long long and there's no |
| 3593 | * assurance that xfid->fid_ino is properly aligned. |
| 3594 | */ |
| 3595 | memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino)); |
| 3596 | xfid->fid_gen = ip->i_d.di_gen; |
| 3597 | |
| 3598 | return 0; |
| 3599 | } |
| 3600 | |
| 3601 | |
| 3602 | /* |
| 3603 | * xfs_rwlock |
| 3604 | */ |
| 3605 | int |
| 3606 | xfs_rwlock( |
| 3607 | bhv_desc_t *bdp, |
| 3608 | vrwlock_t locktype) |
| 3609 | { |
| 3610 | xfs_inode_t *ip; |
| 3611 | vnode_t *vp; |
| 3612 | |
| 3613 | vp = BHV_TO_VNODE(bdp); |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 3614 | if (VN_ISDIR(vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3615 | return 1; |
| 3616 | ip = XFS_BHVTOI(bdp); |
| 3617 | if (locktype == VRWLOCK_WRITE) { |
| 3618 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 3619 | } else if (locktype == VRWLOCK_TRY_READ) { |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3620 | return xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3621 | } else if (locktype == VRWLOCK_TRY_WRITE) { |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3622 | return xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | } else { |
| 3624 | ASSERT((locktype == VRWLOCK_READ) || |
| 3625 | (locktype == VRWLOCK_WRITE_DIRECT)); |
| 3626 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
| 3627 | } |
| 3628 | |
| 3629 | return 1; |
| 3630 | } |
| 3631 | |
| 3632 | |
| 3633 | /* |
| 3634 | * xfs_rwunlock |
| 3635 | */ |
| 3636 | void |
| 3637 | xfs_rwunlock( |
| 3638 | bhv_desc_t *bdp, |
| 3639 | vrwlock_t locktype) |
| 3640 | { |
| 3641 | xfs_inode_t *ip; |
| 3642 | vnode_t *vp; |
| 3643 | |
| 3644 | vp = BHV_TO_VNODE(bdp); |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 3645 | if (VN_ISDIR(vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3646 | return; |
| 3647 | ip = XFS_BHVTOI(bdp); |
| 3648 | if (locktype == VRWLOCK_WRITE) { |
| 3649 | /* |
| 3650 | * In the write case, we may have added a new entry to |
| 3651 | * the reference cache. This might store a pointer to |
| 3652 | * an inode to be released in this inode. If it is there, |
| 3653 | * clear the pointer and release the inode after unlocking |
| 3654 | * this one. |
| 3655 | */ |
| 3656 | xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL); |
| 3657 | } else { |
| 3658 | ASSERT((locktype == VRWLOCK_READ) || |
| 3659 | (locktype == VRWLOCK_WRITE_DIRECT)); |
| 3660 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
| 3661 | } |
| 3662 | return; |
| 3663 | } |
| 3664 | |
| 3665 | STATIC int |
| 3666 | xfs_inode_flush( |
| 3667 | bhv_desc_t *bdp, |
| 3668 | int flags) |
| 3669 | { |
| 3670 | xfs_inode_t *ip; |
| 3671 | xfs_mount_t *mp; |
| 3672 | xfs_inode_log_item_t *iip; |
| 3673 | int error = 0; |
| 3674 | |
| 3675 | ip = XFS_BHVTOI(bdp); |
| 3676 | mp = ip->i_mount; |
| 3677 | iip = ip->i_itemp; |
| 3678 | |
| 3679 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 3680 | return XFS_ERROR(EIO); |
| 3681 | |
| 3682 | /* |
| 3683 | * Bypass inodes which have already been cleaned by |
| 3684 | * the inode flush clustering code inside xfs_iflush |
| 3685 | */ |
| 3686 | if ((ip->i_update_core == 0) && |
| 3687 | ((iip == NULL) || !(iip->ili_format.ilf_fields & XFS_ILOG_ALL))) |
| 3688 | return 0; |
| 3689 | |
| 3690 | if (flags & FLUSH_LOG) { |
| 3691 | if (iip && iip->ili_last_lsn) { |
| 3692 | xlog_t *log = mp->m_log; |
| 3693 | xfs_lsn_t sync_lsn; |
| 3694 | int s, log_flags = XFS_LOG_FORCE; |
| 3695 | |
| 3696 | s = GRANT_LOCK(log); |
| 3697 | sync_lsn = log->l_last_sync_lsn; |
| 3698 | GRANT_UNLOCK(log, s); |
| 3699 | |
| 3700 | if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0)) |
| 3701 | return 0; |
| 3702 | |
| 3703 | if (flags & FLUSH_SYNC) |
| 3704 | log_flags |= XFS_LOG_SYNC; |
| 3705 | return xfs_log_force(mp, iip->ili_last_lsn, log_flags); |
| 3706 | } |
| 3707 | } |
| 3708 | |
| 3709 | /* |
| 3710 | * We make this non-blocking if the inode is contended, |
| 3711 | * return EAGAIN to indicate to the caller that they |
| 3712 | * did not succeed. This prevents the flush path from |
| 3713 | * blocking on inodes inside another operation right |
| 3714 | * now, they get caught later by xfs_sync. |
| 3715 | */ |
| 3716 | if (flags & FLUSH_INODE) { |
| 3717 | int flush_flags; |
| 3718 | |
| 3719 | if (xfs_ipincount(ip)) |
| 3720 | return EAGAIN; |
| 3721 | |
| 3722 | if (flags & FLUSH_SYNC) { |
| 3723 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 3724 | xfs_iflock(ip); |
| 3725 | } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { |
| 3726 | if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) { |
| 3727 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 3728 | return EAGAIN; |
| 3729 | } |
| 3730 | } else { |
| 3731 | return EAGAIN; |
| 3732 | } |
| 3733 | |
| 3734 | if (flags & FLUSH_SYNC) |
| 3735 | flush_flags = XFS_IFLUSH_SYNC; |
| 3736 | else |
| 3737 | flush_flags = XFS_IFLUSH_ASYNC; |
| 3738 | |
| 3739 | error = xfs_iflush(ip, flush_flags); |
| 3740 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 3741 | } |
| 3742 | |
| 3743 | return error; |
| 3744 | } |
| 3745 | |
| 3746 | |
| 3747 | int |
| 3748 | xfs_set_dmattrs ( |
| 3749 | bhv_desc_t *bdp, |
| 3750 | u_int evmask, |
| 3751 | u_int16_t state, |
| 3752 | cred_t *credp) |
| 3753 | { |
| 3754 | xfs_inode_t *ip; |
| 3755 | xfs_trans_t *tp; |
| 3756 | xfs_mount_t *mp; |
| 3757 | int error; |
| 3758 | |
| 3759 | if (!capable(CAP_SYS_ADMIN)) |
| 3760 | return XFS_ERROR(EPERM); |
| 3761 | |
| 3762 | ip = XFS_BHVTOI(bdp); |
| 3763 | mp = ip->i_mount; |
| 3764 | |
| 3765 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 3766 | return XFS_ERROR(EIO); |
| 3767 | |
| 3768 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); |
| 3769 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); |
| 3770 | if (error) { |
| 3771 | xfs_trans_cancel(tp, 0); |
| 3772 | return error; |
| 3773 | } |
| 3774 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 3775 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 3776 | |
| 3777 | ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask; |
| 3778 | ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state; |
| 3779 | |
| 3780 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 3781 | IHOLD(ip); |
| 3782 | error = xfs_trans_commit(tp, 0, NULL); |
| 3783 | |
| 3784 | return error; |
| 3785 | } |
| 3786 | |
| 3787 | |
| 3788 | /* |
| 3789 | * xfs_reclaim |
| 3790 | */ |
| 3791 | STATIC int |
| 3792 | xfs_reclaim( |
| 3793 | bhv_desc_t *bdp) |
| 3794 | { |
| 3795 | xfs_inode_t *ip; |
| 3796 | vnode_t *vp; |
| 3797 | |
| 3798 | vp = BHV_TO_VNODE(bdp); |
| 3799 | ip = XFS_BHVTOI(bdp); |
| 3800 | |
| 3801 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 3802 | |
| 3803 | ASSERT(!VN_MAPPED(vp)); |
| 3804 | |
| 3805 | /* bad inode, get out here ASAP */ |
| 3806 | if (VN_BAD(vp)) { |
| 3807 | xfs_ireclaim(ip); |
| 3808 | return 0; |
| 3809 | } |
| 3810 | |
Christoph Hellwig | 51c91ed | 2005-09-02 16:58:38 +1000 | [diff] [blame] | 3811 | vn_iowait(vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3812 | |
Christoph Hellwig | 51c91ed | 2005-09-02 16:58:38 +1000 | [diff] [blame] | 3813 | ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3814 | |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 3815 | /* |
| 3816 | * Make sure the atime in the XFS inode is correct before freeing the |
| 3817 | * Linux inode. |
| 3818 | */ |
| 3819 | xfs_synchronize_atime(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3820 | |
| 3821 | /* If we have nothing to flush with this inode then complete the |
| 3822 | * teardown now, otherwise break the link between the xfs inode |
| 3823 | * and the linux inode and clean up the xfs inode later. This |
| 3824 | * avoids flushing the inode to disk during the delete operation |
| 3825 | * itself. |
| 3826 | */ |
| 3827 | if (!ip->i_update_core && (ip->i_itemp == NULL)) { |
| 3828 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 3829 | xfs_iflock(ip); |
| 3830 | return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC); |
| 3831 | } else { |
| 3832 | xfs_mount_t *mp = ip->i_mount; |
| 3833 | |
| 3834 | /* Protect sync from us */ |
| 3835 | XFS_MOUNT_ILOCK(mp); |
| 3836 | vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip)); |
| 3837 | list_add_tail(&ip->i_reclaim, &mp->m_del_inodes); |
| 3838 | ip->i_flags |= XFS_IRECLAIMABLE; |
| 3839 | XFS_MOUNT_IUNLOCK(mp); |
| 3840 | } |
| 3841 | return 0; |
| 3842 | } |
| 3843 | |
| 3844 | int |
| 3845 | xfs_finish_reclaim( |
| 3846 | xfs_inode_t *ip, |
| 3847 | int locked, |
| 3848 | int sync_mode) |
| 3849 | { |
| 3850 | xfs_ihash_t *ih = ip->i_hash; |
| 3851 | vnode_t *vp = XFS_ITOV_NULL(ip); |
| 3852 | int error; |
| 3853 | |
| 3854 | if (vp && VN_BAD(vp)) |
| 3855 | goto reclaim; |
| 3856 | |
| 3857 | /* The hash lock here protects a thread in xfs_iget_core from |
| 3858 | * racing with us on linking the inode back with a vnode. |
| 3859 | * Once we have the XFS_IRECLAIM flag set it will not touch |
| 3860 | * us. |
| 3861 | */ |
| 3862 | write_lock(&ih->ih_lock); |
| 3863 | if ((ip->i_flags & XFS_IRECLAIM) || |
| 3864 | (!(ip->i_flags & XFS_IRECLAIMABLE) && vp == NULL)) { |
| 3865 | write_unlock(&ih->ih_lock); |
| 3866 | if (locked) { |
| 3867 | xfs_ifunlock(ip); |
| 3868 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 3869 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3870 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3871 | } |
| 3872 | ip->i_flags |= XFS_IRECLAIM; |
| 3873 | write_unlock(&ih->ih_lock); |
| 3874 | |
| 3875 | /* |
| 3876 | * If the inode is still dirty, then flush it out. If the inode |
| 3877 | * is not in the AIL, then it will be OK to flush it delwri as |
| 3878 | * long as xfs_iflush() does not keep any references to the inode. |
| 3879 | * We leave that decision up to xfs_iflush() since it has the |
| 3880 | * knowledge of whether it's OK to simply do a delwri flush of |
| 3881 | * the inode or whether we need to wait until the inode is |
| 3882 | * pulled from the AIL. |
| 3883 | * We get the flush lock regardless, though, just to make sure |
| 3884 | * we don't free it while it is being flushed. |
| 3885 | */ |
| 3886 | if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| 3887 | if (!locked) { |
| 3888 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 3889 | xfs_iflock(ip); |
| 3890 | } |
| 3891 | |
| 3892 | if (ip->i_update_core || |
| 3893 | ((ip->i_itemp != NULL) && |
| 3894 | (ip->i_itemp->ili_format.ilf_fields != 0))) { |
| 3895 | error = xfs_iflush(ip, sync_mode); |
| 3896 | /* |
| 3897 | * If we hit an error, typically because of filesystem |
| 3898 | * shutdown, we don't need to let vn_reclaim to know |
| 3899 | * because we're gonna reclaim the inode anyway. |
| 3900 | */ |
| 3901 | if (error) { |
| 3902 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 3903 | goto reclaim; |
| 3904 | } |
| 3905 | xfs_iflock(ip); /* synchronize with xfs_iflush_done */ |
| 3906 | } |
| 3907 | |
| 3908 | ASSERT(ip->i_update_core == 0); |
| 3909 | ASSERT(ip->i_itemp == NULL || |
| 3910 | ip->i_itemp->ili_format.ilf_fields == 0); |
| 3911 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 3912 | } else if (locked) { |
| 3913 | /* |
| 3914 | * We are not interested in doing an iflush if we're |
| 3915 | * in the process of shutting down the filesystem forcibly. |
| 3916 | * So, just reclaim the inode. |
| 3917 | */ |
| 3918 | xfs_ifunlock(ip); |
| 3919 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 3920 | } |
| 3921 | |
| 3922 | reclaim: |
| 3923 | xfs_ireclaim(ip); |
| 3924 | return 0; |
| 3925 | } |
| 3926 | |
| 3927 | int |
| 3928 | xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock) |
| 3929 | { |
| 3930 | int purged; |
| 3931 | xfs_inode_t *ip, *n; |
| 3932 | int done = 0; |
| 3933 | |
| 3934 | while (!done) { |
| 3935 | purged = 0; |
| 3936 | XFS_MOUNT_ILOCK(mp); |
| 3937 | list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) { |
| 3938 | if (noblock) { |
| 3939 | if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) |
| 3940 | continue; |
| 3941 | if (xfs_ipincount(ip) || |
| 3942 | !xfs_iflock_nowait(ip)) { |
| 3943 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 3944 | continue; |
| 3945 | } |
| 3946 | } |
| 3947 | XFS_MOUNT_IUNLOCK(mp); |
Felix Blyakher | 6b2cf61 | 2005-11-25 16:42:13 +1100 | [diff] [blame] | 3948 | if (xfs_finish_reclaim(ip, noblock, |
| 3949 | XFS_IFLUSH_DELWRI_ELSE_ASYNC)) |
| 3950 | delay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | purged = 1; |
| 3952 | break; |
| 3953 | } |
| 3954 | |
| 3955 | done = !purged; |
| 3956 | } |
| 3957 | |
| 3958 | XFS_MOUNT_IUNLOCK(mp); |
| 3959 | return 0; |
| 3960 | } |
| 3961 | |
| 3962 | /* |
| 3963 | * xfs_alloc_file_space() |
| 3964 | * This routine allocates disk space for the given file. |
| 3965 | * |
| 3966 | * If alloc_type == 0, this request is for an ALLOCSP type |
| 3967 | * request which will change the file size. In this case, no |
| 3968 | * DMAPI event will be generated by the call. A TRUNCATE event |
| 3969 | * will be generated later by xfs_setattr. |
| 3970 | * |
| 3971 | * If alloc_type != 0, this request is for a RESVSP type |
| 3972 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the |
| 3973 | * lower block boundary byte address is less than the file's |
| 3974 | * length. |
| 3975 | * |
| 3976 | * RETURNS: |
| 3977 | * 0 on success |
| 3978 | * errno on error |
| 3979 | * |
| 3980 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 3981 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3982 | xfs_alloc_file_space( |
| 3983 | xfs_inode_t *ip, |
| 3984 | xfs_off_t offset, |
| 3985 | xfs_off_t len, |
| 3986 | int alloc_type, |
| 3987 | int attr_flags) |
| 3988 | { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 3989 | xfs_mount_t *mp = ip->i_mount; |
| 3990 | xfs_off_t count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | xfs_filblks_t allocated_fsb; |
| 3992 | xfs_filblks_t allocatesize_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 3993 | xfs_extlen_t extsz, temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3994 | xfs_fileoff_t startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 3995 | xfs_fsblock_t firstfsb; |
| 3996 | int nimaps; |
| 3997 | int bmapi_flag; |
| 3998 | int quota_flag; |
| 3999 | int rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | xfs_trans_t *tp; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4001 | xfs_bmbt_irec_t imaps[1], *imapp; |
| 4002 | xfs_bmap_free_t free_list; |
| 4003 | uint qblocks, resblks, resrtextents; |
| 4004 | int committed; |
| 4005 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4006 | |
| 4007 | vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | |
| 4009 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 4010 | return XFS_ERROR(EIO); |
| 4011 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4012 | rt = XFS_IS_REALTIME_INODE(ip); |
| 4013 | if (unlikely(rt)) { |
| 4014 | if (!(extsz = ip->i_d.di_extsize)) |
| 4015 | extsz = mp->m_sb.sb_rextsize; |
| 4016 | } else { |
| 4017 | extsz = ip->i_d.di_extsize; |
| 4018 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4019 | |
| 4020 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| 4021 | return error; |
| 4022 | |
| 4023 | if (len <= 0) |
| 4024 | return XFS_ERROR(EINVAL); |
| 4025 | |
| 4026 | count = len; |
| 4027 | error = 0; |
| 4028 | imapp = &imaps[0]; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4029 | nimaps = 1; |
| 4030 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4031 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 4032 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); |
| 4033 | |
| 4034 | /* Generate a DMAPI event if needed. */ |
| 4035 | if (alloc_type != 0 && offset < ip->i_d.di_size && |
| 4036 | (attr_flags&ATTR_DMI) == 0 && |
| 4037 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { |
| 4038 | xfs_off_t end_dmi_offset; |
| 4039 | |
| 4040 | end_dmi_offset = offset+len; |
| 4041 | if (end_dmi_offset > ip->i_d.di_size) |
| 4042 | end_dmi_offset = ip->i_d.di_size; |
| 4043 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip), |
| 4044 | offset, end_dmi_offset - offset, |
| 4045 | 0, NULL); |
| 4046 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4047 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4048 | } |
| 4049 | |
| 4050 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4051 | * Allocate file space until done or until there is an error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4052 | */ |
| 4053 | retry: |
| 4054 | while (allocatesize_fsb && !error) { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4055 | xfs_fileoff_t s, e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4056 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4057 | /* |
Nathan Scott | 3ddb8fa | 2006-01-11 15:33:02 +1100 | [diff] [blame] | 4058 | * Determine space reservations for data/realtime. |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4059 | */ |
| 4060 | if (unlikely(extsz)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4061 | s = startoffset_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4062 | do_div(s, extsz); |
| 4063 | s *= extsz; |
| 4064 | e = startoffset_fsb + allocatesize_fsb; |
| 4065 | if ((temp = do_mod(startoffset_fsb, extsz))) |
| 4066 | e += temp; |
| 4067 | if ((temp = do_mod(e, extsz))) |
| 4068 | e += extsz - temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | } else { |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4070 | s = 0; |
| 4071 | e = allocatesize_fsb; |
| 4072 | } |
| 4073 | |
| 4074 | if (unlikely(rt)) { |
| 4075 | resrtextents = qblocks = (uint)(e - s); |
| 4076 | resrtextents /= mp->m_sb.sb_rextsize; |
| 4077 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 4078 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 4079 | } else { |
| 4080 | resrtextents = 0; |
| 4081 | resblks = qblocks = \ |
| 4082 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); |
| 4083 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | } |
| 4085 | |
| 4086 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4087 | * Allocate and setup the transaction. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4088 | */ |
| 4089 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4090 | error = xfs_trans_reserve(tp, resblks, |
| 4091 | XFS_WRITE_LOG_RES(mp), resrtextents, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | XFS_TRANS_PERM_LOG_RES, |
| 4093 | XFS_WRITE_LOG_COUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4094 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4095 | * Check for running out of space |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4096 | */ |
| 4097 | if (error) { |
| 4098 | /* |
| 4099 | * Free the transaction structure. |
| 4100 | */ |
| 4101 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 4102 | xfs_trans_cancel(tp, 0); |
| 4103 | break; |
| 4104 | } |
| 4105 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4106 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
| 4107 | qblocks, 0, quota_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4108 | if (error) |
| 4109 | goto error1; |
| 4110 | |
| 4111 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 4112 | xfs_trans_ihold(tp, ip); |
| 4113 | |
| 4114 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4115 | * Issue the xfs_bmapi() call to allocate the blocks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4116 | */ |
| 4117 | XFS_BMAP_INIT(&free_list, &firstfsb); |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4118 | error = XFS_BMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4119 | allocatesize_fsb, bmapi_flag, |
| 4120 | &firstfsb, 0, imapp, &nimaps, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4121 | &free_list, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4122 | if (error) { |
| 4123 | goto error0; |
| 4124 | } |
| 4125 | |
| 4126 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4127 | * Complete the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4128 | */ |
| 4129 | error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed); |
| 4130 | if (error) { |
| 4131 | goto error0; |
| 4132 | } |
| 4133 | |
| 4134 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 4135 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 4136 | if (error) { |
| 4137 | break; |
| 4138 | } |
| 4139 | |
| 4140 | allocated_fsb = imapp->br_blockcount; |
| 4141 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4142 | if (nimaps == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4143 | error = XFS_ERROR(ENOSPC); |
| 4144 | break; |
| 4145 | } |
| 4146 | |
| 4147 | startoffset_fsb += allocated_fsb; |
| 4148 | allocatesize_fsb -= allocated_fsb; |
| 4149 | } |
| 4150 | dmapi_enospc_check: |
| 4151 | if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 && |
| 4152 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) { |
| 4153 | |
| 4154 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
| 4155 | XFS_ITOV(ip), DM_RIGHT_NULL, |
| 4156 | XFS_ITOV(ip), DM_RIGHT_NULL, |
| 4157 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
| 4158 | if (error == 0) |
| 4159 | goto retry; /* Maybe DMAPI app. has made space */ |
| 4160 | /* else fall through with error from XFS_SEND_DATA */ |
| 4161 | } |
| 4162 | |
| 4163 | return error; |
| 4164 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4165 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4166 | xfs_bmap_cancel(&free_list); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4167 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
| 4168 | |
| 4169 | error1: /* Just cancel transaction */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4170 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 4171 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 4172 | goto dmapi_enospc_check; |
| 4173 | } |
| 4174 | |
| 4175 | /* |
| 4176 | * Zero file bytes between startoff and endoff inclusive. |
| 4177 | * The iolock is held exclusive and no blocks are buffered. |
| 4178 | */ |
| 4179 | STATIC int |
| 4180 | xfs_zero_remaining_bytes( |
| 4181 | xfs_inode_t *ip, |
| 4182 | xfs_off_t startoff, |
| 4183 | xfs_off_t endoff) |
| 4184 | { |
| 4185 | xfs_bmbt_irec_t imap; |
| 4186 | xfs_fileoff_t offset_fsb; |
| 4187 | xfs_off_t lastoffset; |
| 4188 | xfs_off_t offset; |
| 4189 | xfs_buf_t *bp; |
| 4190 | xfs_mount_t *mp = ip->i_mount; |
| 4191 | int nimap; |
| 4192 | int error = 0; |
| 4193 | |
| 4194 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, |
| 4195 | ip->i_d.di_flags & XFS_DIFLAG_REALTIME ? |
| 4196 | mp->m_rtdev_targp : mp->m_ddev_targp); |
| 4197 | |
| 4198 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
| 4199 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 4200 | nimap = 1; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4201 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, offset_fsb, 1, 0, |
| 4202 | NULL, 0, &imap, &nimap, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4203 | if (error || nimap < 1) |
| 4204 | break; |
| 4205 | ASSERT(imap.br_blockcount >= 1); |
| 4206 | ASSERT(imap.br_startoff == offset_fsb); |
| 4207 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; |
| 4208 | if (lastoffset > endoff) |
| 4209 | lastoffset = endoff; |
| 4210 | if (imap.br_startblock == HOLESTARTBLOCK) |
| 4211 | continue; |
| 4212 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 4213 | if (imap.br_state == XFS_EXT_UNWRITTEN) |
| 4214 | continue; |
| 4215 | XFS_BUF_UNDONE(bp); |
| 4216 | XFS_BUF_UNWRITE(bp); |
| 4217 | XFS_BUF_READ(bp); |
| 4218 | XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock)); |
| 4219 | xfsbdstrat(mp, bp); |
| 4220 | if ((error = xfs_iowait(bp))) { |
| 4221 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
| 4222 | mp, bp, XFS_BUF_ADDR(bp)); |
| 4223 | break; |
| 4224 | } |
| 4225 | memset(XFS_BUF_PTR(bp) + |
| 4226 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
| 4227 | 0, lastoffset - offset + 1); |
| 4228 | XFS_BUF_UNDONE(bp); |
| 4229 | XFS_BUF_UNREAD(bp); |
| 4230 | XFS_BUF_WRITE(bp); |
| 4231 | xfsbdstrat(mp, bp); |
| 4232 | if ((error = xfs_iowait(bp))) { |
| 4233 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
| 4234 | mp, bp, XFS_BUF_ADDR(bp)); |
| 4235 | break; |
| 4236 | } |
| 4237 | } |
| 4238 | xfs_buf_free(bp); |
| 4239 | return error; |
| 4240 | } |
| 4241 | |
| 4242 | /* |
| 4243 | * xfs_free_file_space() |
| 4244 | * This routine frees disk space for the given file. |
| 4245 | * |
| 4246 | * This routine is only called by xfs_change_file_space |
| 4247 | * for an UNRESVSP type call. |
| 4248 | * |
| 4249 | * RETURNS: |
| 4250 | * 0 on success |
| 4251 | * errno on error |
| 4252 | * |
| 4253 | */ |
| 4254 | STATIC int |
| 4255 | xfs_free_file_space( |
| 4256 | xfs_inode_t *ip, |
| 4257 | xfs_off_t offset, |
| 4258 | xfs_off_t len, |
| 4259 | int attr_flags) |
| 4260 | { |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 4261 | vnode_t *vp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4262 | int committed; |
| 4263 | int done; |
| 4264 | xfs_off_t end_dmi_offset; |
| 4265 | xfs_fileoff_t endoffset_fsb; |
| 4266 | int error; |
| 4267 | xfs_fsblock_t firstfsb; |
| 4268 | xfs_bmap_free_t free_list; |
| 4269 | xfs_off_t ilen; |
| 4270 | xfs_bmbt_irec_t imap; |
| 4271 | xfs_off_t ioffset; |
| 4272 | xfs_extlen_t mod=0; |
| 4273 | xfs_mount_t *mp; |
| 4274 | int nimap; |
| 4275 | uint resblks; |
| 4276 | int rounding; |
| 4277 | int rt; |
| 4278 | xfs_fileoff_t startoffset_fsb; |
| 4279 | xfs_trans_t *tp; |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 4280 | int need_iolock = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4281 | |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 4282 | vp = XFS_ITOV(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4283 | mp = ip->i_mount; |
| 4284 | |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 4285 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 4286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| 4288 | return error; |
| 4289 | |
| 4290 | error = 0; |
| 4291 | if (len <= 0) /* if nothing being freed */ |
| 4292 | return error; |
| 4293 | rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME); |
| 4294 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
| 4295 | end_dmi_offset = offset + len; |
| 4296 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); |
| 4297 | |
| 4298 | if (offset < ip->i_d.di_size && |
| 4299 | (attr_flags & ATTR_DMI) == 0 && |
| 4300 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { |
| 4301 | if (end_dmi_offset > ip->i_d.di_size) |
| 4302 | end_dmi_offset = ip->i_d.di_size; |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 4303 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4304 | offset, end_dmi_offset - offset, |
| 4305 | AT_DELAY_FLAG(attr_flags), NULL); |
| 4306 | if (error) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4307 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4308 | } |
| 4309 | |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 4310 | if (attr_flags & ATTR_NOLOCK) |
| 4311 | need_iolock = 0; |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 4312 | if (need_iolock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4313 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 4314 | vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
| 4315 | } |
Dean Roehrich | 5fcbab3 | 2005-05-05 13:27:19 -0700 | [diff] [blame] | 4316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4317 | rounding = MAX((__uint8_t)(1 << mp->m_sb.sb_blocklog), |
| 4318 | (__uint8_t)NBPP); |
| 4319 | ilen = len + (offset & (rounding - 1)); |
| 4320 | ioffset = offset & ~(rounding - 1); |
| 4321 | if (ilen & (rounding - 1)) |
| 4322 | ilen = (ilen + rounding) & ~(rounding - 1); |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 4323 | |
| 4324 | if (VN_CACHED(vp) != 0) { |
| 4325 | xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1, |
| 4326 | ctooff(offtoct(ioffset)), -1); |
| 4327 | VOP_FLUSHINVAL_PAGES(vp, ctooff(offtoct(ioffset)), |
| 4328 | -1, FI_REMAPF_LOCKED); |
| 4329 | } |
| 4330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4331 | /* |
| 4332 | * Need to zero the stuff we're not freeing, on disk. |
| 4333 | * If its a realtime file & can't use unwritten extents then we |
| 4334 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
| 4335 | * will take care of it for us. |
| 4336 | */ |
| 4337 | if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { |
| 4338 | nimap = 1; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4339 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, startoffset_fsb, |
| 4340 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4341 | if (error) |
| 4342 | goto out_unlock_iolock; |
| 4343 | ASSERT(nimap == 0 || nimap == 1); |
| 4344 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 4345 | xfs_daddr_t block; |
| 4346 | |
| 4347 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 4348 | block = imap.br_startblock; |
| 4349 | mod = do_div(block, mp->m_sb.sb_rextsize); |
| 4350 | if (mod) |
| 4351 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; |
| 4352 | } |
| 4353 | nimap = 1; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4354 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, endoffset_fsb - 1, |
| 4355 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4356 | if (error) |
| 4357 | goto out_unlock_iolock; |
| 4358 | ASSERT(nimap == 0 || nimap == 1); |
| 4359 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 4360 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 4361 | mod++; |
| 4362 | if (mod && (mod != mp->m_sb.sb_rextsize)) |
| 4363 | endoffset_fsb -= mod; |
| 4364 | } |
| 4365 | } |
| 4366 | if ((done = (endoffset_fsb <= startoffset_fsb))) |
| 4367 | /* |
| 4368 | * One contiguous piece to clear |
| 4369 | */ |
| 4370 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); |
| 4371 | else { |
| 4372 | /* |
| 4373 | * Some full blocks, possibly two pieces to clear |
| 4374 | */ |
| 4375 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) |
| 4376 | error = xfs_zero_remaining_bytes(ip, offset, |
| 4377 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); |
| 4378 | if (!error && |
| 4379 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) |
| 4380 | error = xfs_zero_remaining_bytes(ip, |
| 4381 | XFS_FSB_TO_B(mp, endoffset_fsb), |
| 4382 | offset + len - 1); |
| 4383 | } |
| 4384 | |
| 4385 | /* |
| 4386 | * free file space until done or until there is an error |
| 4387 | */ |
| 4388 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 4389 | while (!error && !done) { |
| 4390 | |
| 4391 | /* |
| 4392 | * allocate and setup the transaction |
| 4393 | */ |
| 4394 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
| 4395 | error = xfs_trans_reserve(tp, |
| 4396 | resblks, |
| 4397 | XFS_WRITE_LOG_RES(mp), |
| 4398 | 0, |
| 4399 | XFS_TRANS_PERM_LOG_RES, |
| 4400 | XFS_WRITE_LOG_COUNT); |
| 4401 | |
| 4402 | /* |
| 4403 | * check for running out of space |
| 4404 | */ |
| 4405 | if (error) { |
| 4406 | /* |
| 4407 | * Free the transaction structure. |
| 4408 | */ |
| 4409 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| 4410 | xfs_trans_cancel(tp, 0); |
| 4411 | break; |
| 4412 | } |
| 4413 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 4414 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 4415 | ip->i_udquot, ip->i_gdquot, resblks, 0, |
| 4416 | XFS_QMOPT_RES_REGBLKS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4417 | if (error) |
| 4418 | goto error1; |
| 4419 | |
| 4420 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 4421 | xfs_trans_ihold(tp, ip); |
| 4422 | |
| 4423 | /* |
| 4424 | * issue the bunmapi() call to free the blocks |
| 4425 | */ |
| 4426 | XFS_BMAP_INIT(&free_list, &firstfsb); |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4427 | error = XFS_BUNMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4428 | endoffset_fsb - startoffset_fsb, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 4429 | 0, 2, &firstfsb, &free_list, NULL, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4430 | if (error) { |
| 4431 | goto error0; |
| 4432 | } |
| 4433 | |
| 4434 | /* |
| 4435 | * complete the transaction |
| 4436 | */ |
| 4437 | error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed); |
| 4438 | if (error) { |
| 4439 | goto error0; |
| 4440 | } |
| 4441 | |
| 4442 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| 4443 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 4444 | } |
| 4445 | |
| 4446 | out_unlock_iolock: |
| 4447 | if (need_iolock) |
| 4448 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 4449 | return error; |
| 4450 | |
| 4451 | error0: |
| 4452 | xfs_bmap_cancel(&free_list); |
| 4453 | error1: |
| 4454 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 4455 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : |
| 4456 | XFS_ILOCK_EXCL); |
| 4457 | return error; |
| 4458 | } |
| 4459 | |
| 4460 | /* |
| 4461 | * xfs_change_file_space() |
| 4462 | * This routine allocates or frees disk space for the given file. |
| 4463 | * The user specified parameters are checked for alignment and size |
| 4464 | * limitations. |
| 4465 | * |
| 4466 | * RETURNS: |
| 4467 | * 0 on success |
| 4468 | * errno on error |
| 4469 | * |
| 4470 | */ |
| 4471 | int |
| 4472 | xfs_change_file_space( |
| 4473 | bhv_desc_t *bdp, |
| 4474 | int cmd, |
| 4475 | xfs_flock64_t *bf, |
| 4476 | xfs_off_t offset, |
| 4477 | cred_t *credp, |
| 4478 | int attr_flags) |
| 4479 | { |
| 4480 | int clrprealloc; |
| 4481 | int error; |
| 4482 | xfs_fsize_t fsize; |
| 4483 | xfs_inode_t *ip; |
| 4484 | xfs_mount_t *mp; |
| 4485 | int setprealloc; |
| 4486 | xfs_off_t startoffset; |
| 4487 | xfs_off_t llen; |
| 4488 | xfs_trans_t *tp; |
| 4489 | vattr_t va; |
| 4490 | vnode_t *vp; |
| 4491 | |
| 4492 | vp = BHV_TO_VNODE(bdp); |
| 4493 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| 4494 | |
| 4495 | ip = XFS_BHVTOI(bdp); |
| 4496 | mp = ip->i_mount; |
| 4497 | |
| 4498 | /* |
| 4499 | * must be a regular file and have write permission |
| 4500 | */ |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 4501 | if (!VN_ISREG(vp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4502 | return XFS_ERROR(EINVAL); |
| 4503 | |
| 4504 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 4505 | |
| 4506 | if ((error = xfs_iaccess(ip, S_IWUSR, credp))) { |
| 4507 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 4508 | return error; |
| 4509 | } |
| 4510 | |
| 4511 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 4512 | |
| 4513 | switch (bf->l_whence) { |
| 4514 | case 0: /*SEEK_SET*/ |
| 4515 | break; |
| 4516 | case 1: /*SEEK_CUR*/ |
| 4517 | bf->l_start += offset; |
| 4518 | break; |
| 4519 | case 2: /*SEEK_END*/ |
| 4520 | bf->l_start += ip->i_d.di_size; |
| 4521 | break; |
| 4522 | default: |
| 4523 | return XFS_ERROR(EINVAL); |
| 4524 | } |
| 4525 | |
| 4526 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; |
| 4527 | |
| 4528 | if ( (bf->l_start < 0) |
| 4529 | || (bf->l_start > XFS_MAXIOFFSET(mp)) |
| 4530 | || (bf->l_start + llen < 0) |
| 4531 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) |
| 4532 | return XFS_ERROR(EINVAL); |
| 4533 | |
| 4534 | bf->l_whence = 0; |
| 4535 | |
| 4536 | startoffset = bf->l_start; |
| 4537 | fsize = ip->i_d.di_size; |
| 4538 | |
| 4539 | /* |
| 4540 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve |
| 4541 | * file space. |
| 4542 | * These calls do NOT zero the data space allocated to the file, |
| 4543 | * nor do they change the file size. |
| 4544 | * |
| 4545 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file |
| 4546 | * space. |
| 4547 | * These calls cause the new file data to be zeroed and the file |
| 4548 | * size to be changed. |
| 4549 | */ |
| 4550 | setprealloc = clrprealloc = 0; |
| 4551 | |
| 4552 | switch (cmd) { |
| 4553 | case XFS_IOC_RESVSP: |
| 4554 | case XFS_IOC_RESVSP64: |
| 4555 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, |
| 4556 | 1, attr_flags); |
| 4557 | if (error) |
| 4558 | return error; |
| 4559 | setprealloc = 1; |
| 4560 | break; |
| 4561 | |
| 4562 | case XFS_IOC_UNRESVSP: |
| 4563 | case XFS_IOC_UNRESVSP64: |
| 4564 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, |
| 4565 | attr_flags))) |
| 4566 | return error; |
| 4567 | break; |
| 4568 | |
| 4569 | case XFS_IOC_ALLOCSP: |
| 4570 | case XFS_IOC_ALLOCSP64: |
| 4571 | case XFS_IOC_FREESP: |
| 4572 | case XFS_IOC_FREESP64: |
| 4573 | if (startoffset > fsize) { |
| 4574 | error = xfs_alloc_file_space(ip, fsize, |
| 4575 | startoffset - fsize, 0, attr_flags); |
| 4576 | if (error) |
| 4577 | break; |
| 4578 | } |
| 4579 | |
| 4580 | va.va_mask = XFS_AT_SIZE; |
| 4581 | va.va_size = startoffset; |
| 4582 | |
| 4583 | error = xfs_setattr(bdp, &va, attr_flags, credp); |
| 4584 | |
| 4585 | if (error) |
| 4586 | return error; |
| 4587 | |
| 4588 | clrprealloc = 1; |
| 4589 | break; |
| 4590 | |
| 4591 | default: |
| 4592 | ASSERT(0); |
| 4593 | return XFS_ERROR(EINVAL); |
| 4594 | } |
| 4595 | |
| 4596 | /* |
| 4597 | * update the inode timestamp, mode, and prealloc flag bits |
| 4598 | */ |
| 4599 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); |
| 4600 | |
| 4601 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), |
| 4602 | 0, 0, 0))) { |
| 4603 | /* ASSERT(0); */ |
| 4604 | xfs_trans_cancel(tp, 0); |
| 4605 | return error; |
| 4606 | } |
| 4607 | |
| 4608 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 4609 | |
| 4610 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 4611 | xfs_trans_ihold(tp, ip); |
| 4612 | |
| 4613 | if ((attr_flags & ATTR_DMI) == 0) { |
| 4614 | ip->i_d.di_mode &= ~S_ISUID; |
| 4615 | |
| 4616 | /* |
| 4617 | * Note that we don't have to worry about mandatory |
| 4618 | * file locking being disabled here because we only |
| 4619 | * clear the S_ISGID bit if the Group execute bit is |
| 4620 | * on, but if it was on then mandatory locking wouldn't |
| 4621 | * have been enabled. |
| 4622 | */ |
| 4623 | if (ip->i_d.di_mode & S_IXGRP) |
| 4624 | ip->i_d.di_mode &= ~S_ISGID; |
| 4625 | |
| 4626 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| 4627 | } |
| 4628 | if (setprealloc) |
| 4629 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; |
| 4630 | else if (clrprealloc) |
| 4631 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; |
| 4632 | |
| 4633 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 4634 | xfs_trans_set_sync(tp); |
| 4635 | |
| 4636 | error = xfs_trans_commit(tp, 0, NULL); |
| 4637 | |
| 4638 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 4639 | |
| 4640 | return error; |
| 4641 | } |
| 4642 | |
| 4643 | vnodeops_t xfs_vnodeops = { |
| 4644 | BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS), |
| 4645 | .vop_open = xfs_open, |
| 4646 | .vop_read = xfs_read, |
| 4647 | #ifdef HAVE_SENDFILE |
| 4648 | .vop_sendfile = xfs_sendfile, |
| 4649 | #endif |
Nathan Scott | 1b89584 | 2006-03-31 13:08:59 +1000 | [diff] [blame] | 4650 | #ifdef HAVE_SPLICE |
| 4651 | .vop_splice_read = xfs_splice_read, |
| 4652 | .vop_splice_write = xfs_splice_write, |
| 4653 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4654 | .vop_write = xfs_write, |
| 4655 | .vop_ioctl = xfs_ioctl, |
| 4656 | .vop_getattr = xfs_getattr, |
| 4657 | .vop_setattr = xfs_setattr, |
| 4658 | .vop_access = xfs_access, |
| 4659 | .vop_lookup = xfs_lookup, |
| 4660 | .vop_create = xfs_create, |
| 4661 | .vop_remove = xfs_remove, |
| 4662 | .vop_link = xfs_link, |
| 4663 | .vop_rename = xfs_rename, |
| 4664 | .vop_mkdir = xfs_mkdir, |
| 4665 | .vop_rmdir = xfs_rmdir, |
| 4666 | .vop_readdir = xfs_readdir, |
| 4667 | .vop_symlink = xfs_symlink, |
| 4668 | .vop_readlink = xfs_readlink, |
| 4669 | .vop_fsync = xfs_fsync, |
| 4670 | .vop_inactive = xfs_inactive, |
| 4671 | .vop_fid2 = xfs_fid2, |
| 4672 | .vop_rwlock = xfs_rwlock, |
| 4673 | .vop_rwunlock = xfs_rwunlock, |
| 4674 | .vop_bmap = xfs_bmap, |
| 4675 | .vop_reclaim = xfs_reclaim, |
| 4676 | .vop_attr_get = xfs_attr_get, |
| 4677 | .vop_attr_set = xfs_attr_set, |
| 4678 | .vop_attr_remove = xfs_attr_remove, |
| 4679 | .vop_attr_list = xfs_attr_list, |
| 4680 | .vop_link_removed = (vop_link_removed_t)fs_noval, |
| 4681 | .vop_vnode_change = (vop_vnode_change_t)fs_noval, |
| 4682 | .vop_tosspages = fs_tosspages, |
| 4683 | .vop_flushinval_pages = fs_flushinval_pages, |
| 4684 | .vop_flush_pages = fs_flush_pages, |
| 4685 | .vop_release = xfs_release, |
| 4686 | .vop_iflush = xfs_inode_flush, |
| 4687 | }; |