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 | */ |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 18 | #include <linux/log2.h> |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 25 | #include "xfs_inum.h" |
| 26 | #include "xfs_imap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_trans.h" |
| 28 | #include "xfs_trans_priv.h" |
| 29 | #include "xfs_sb.h" |
| 30 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_dir2.h" |
| 32 | #include "xfs_dmapi.h" |
| 33 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 38 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "xfs_inode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_buf_item.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 42 | #include "xfs_inode_item.h" |
| 43 | #include "xfs_btree.h" |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 44 | #include "xfs_btree_trace.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 45 | #include "xfs_alloc.h" |
| 46 | #include "xfs_ialloc.h" |
| 47 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include "xfs_rw.h" |
| 49 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include "xfs_utils.h" |
| 51 | #include "xfs_dir2_trace.h" |
| 52 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include "xfs_acl.h" |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 54 | #include "xfs_filestream.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 55 | #include "xfs_vnodeops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | kmem_zone_t *xfs_ifork_zone; |
| 58 | kmem_zone_t *xfs_inode_zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* |
| 61 | * Used in xfs_itruncate(). This is the maximum number of extents |
| 62 | * freed from a file in a single transaction. |
| 63 | */ |
| 64 | #define XFS_ITRUNC_MAX_EXTENTS 2 |
| 65 | |
| 66 | STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *); |
| 67 | STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int); |
| 68 | STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int); |
| 69 | STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int); |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #ifdef DEBUG |
| 72 | /* |
| 73 | * Make sure that the extents in the given memory buffer |
| 74 | * are valid. |
| 75 | */ |
| 76 | STATIC void |
| 77 | xfs_validate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 78 | xfs_ifork_t *ifp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | int nrecs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | xfs_exntfmt_t fmt) |
| 81 | { |
| 82 | xfs_bmbt_irec_t irec; |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 83 | xfs_bmbt_rec_host_t rec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | int i; |
| 85 | |
| 86 | for (i = 0; i < nrecs; i++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 87 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
| 88 | rec.l0 = get_unaligned(&ep->l0); |
| 89 | rec.l1 = get_unaligned(&ep->l1); |
| 90 | xfs_bmbt_get_all(&rec, &irec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | if (fmt == XFS_EXTFMT_NOSTATE) |
| 92 | ASSERT(irec.br_state == XFS_EXT_NORM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | } |
| 94 | } |
| 95 | #else /* DEBUG */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 96 | #define xfs_validate_extents(ifp, nrecs, fmt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #endif /* DEBUG */ |
| 98 | |
| 99 | /* |
| 100 | * Check that none of the inode's in the buffer have a next |
| 101 | * unlinked field of 0. |
| 102 | */ |
| 103 | #if defined(DEBUG) |
| 104 | void |
| 105 | xfs_inobp_check( |
| 106 | xfs_mount_t *mp, |
| 107 | xfs_buf_t *bp) |
| 108 | { |
| 109 | int i; |
| 110 | int j; |
| 111 | xfs_dinode_t *dip; |
| 112 | |
| 113 | j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; |
| 114 | |
| 115 | for (i = 0; i < j; i++) { |
| 116 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, |
| 117 | i * mp->m_sb.sb_inodesize); |
| 118 | if (!dip->di_next_unlinked) { |
| 119 | xfs_fs_cmn_err(CE_ALERT, mp, |
| 120 | "Detected a bogus zero next_unlinked field in incore inode buffer 0x%p. About to pop an ASSERT.", |
| 121 | bp); |
| 122 | ASSERT(dip->di_next_unlinked); |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | #endif |
| 127 | |
| 128 | /* |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 129 | * Find the buffer associated with the given inode map |
| 130 | * We do basic validation checks on the buffer once it has been |
| 131 | * retrieved from disk. |
| 132 | */ |
| 133 | STATIC int |
| 134 | xfs_imap_to_bp( |
| 135 | xfs_mount_t *mp, |
| 136 | xfs_trans_t *tp, |
| 137 | xfs_imap_t *imap, |
| 138 | xfs_buf_t **bpp, |
| 139 | uint buf_flags, |
| 140 | uint imap_flags) |
| 141 | { |
| 142 | int error; |
| 143 | int i; |
| 144 | int ni; |
| 145 | xfs_buf_t *bp; |
| 146 | |
| 147 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 148 | (int)imap->im_len, buf_flags, &bp); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 149 | if (error) { |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 150 | if (error != EAGAIN) { |
| 151 | cmn_err(CE_WARN, |
| 152 | "xfs_imap_to_bp: xfs_trans_read_buf()returned " |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 153 | "an error %d on %s. Returning error.", |
| 154 | error, mp->m_fsname); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 155 | } else { |
| 156 | ASSERT(buf_flags & XFS_BUF_TRYLOCK); |
| 157 | } |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 158 | return error; |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * Validate the magic number and version of every inode in the buffer |
| 163 | * (if DEBUG kernel) or the first inode in the buffer, otherwise. |
| 164 | */ |
| 165 | #ifdef DEBUG |
| 166 | ni = BBTOB(imap->im_len) >> mp->m_sb.sb_inodelog; |
| 167 | #else /* usual case */ |
| 168 | ni = 1; |
| 169 | #endif |
| 170 | |
| 171 | for (i = 0; i < ni; i++) { |
| 172 | int di_ok; |
| 173 | xfs_dinode_t *dip; |
| 174 | |
| 175 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, |
| 176 | (i << mp->m_sb.sb_inodelog)); |
| 177 | di_ok = be16_to_cpu(dip->di_core.di_magic) == XFS_DINODE_MAGIC && |
| 178 | XFS_DINODE_GOOD_VERSION(dip->di_core.di_version); |
| 179 | if (unlikely(XFS_TEST_ERROR(!di_ok, mp, |
| 180 | XFS_ERRTAG_ITOBP_INOTOBP, |
| 181 | XFS_RANDOM_ITOBP_INOTOBP))) { |
| 182 | if (imap_flags & XFS_IMAP_BULKSTAT) { |
| 183 | xfs_trans_brelse(tp, bp); |
| 184 | return XFS_ERROR(EINVAL); |
| 185 | } |
| 186 | XFS_CORRUPTION_ERROR("xfs_imap_to_bp", |
| 187 | XFS_ERRLEVEL_HIGH, mp, dip); |
| 188 | #ifdef DEBUG |
| 189 | cmn_err(CE_PANIC, |
| 190 | "Device %s - bad inode magic/vsn " |
| 191 | "daddr %lld #%d (magic=%x)", |
| 192 | XFS_BUFTARG_NAME(mp->m_ddev_targp), |
| 193 | (unsigned long long)imap->im_blkno, i, |
| 194 | be16_to_cpu(dip->di_core.di_magic)); |
| 195 | #endif |
| 196 | xfs_trans_brelse(tp, bp); |
| 197 | return XFS_ERROR(EFSCORRUPTED); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | xfs_inobp_check(mp, bp); |
| 202 | |
| 203 | /* |
| 204 | * Mark the buffer as an inode buffer now that it looks good |
| 205 | */ |
| 206 | XFS_BUF_SET_VTYPE(bp, B_FS_INO); |
| 207 | |
| 208 | *bpp = bp; |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | * This routine is called to map an inode number within a file |
| 214 | * system to the buffer containing the on-disk version of the |
| 215 | * inode. It returns a pointer to the buffer containing the |
| 216 | * on-disk inode in the bpp parameter, and in the dip parameter |
| 217 | * it returns a pointer to the on-disk inode within that buffer. |
| 218 | * |
| 219 | * If a non-zero error is returned, then the contents of bpp and |
| 220 | * dipp are undefined. |
| 221 | * |
| 222 | * Use xfs_imap() to determine the size and location of the |
| 223 | * buffer to read from disk. |
| 224 | */ |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 225 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | xfs_inotobp( |
| 227 | xfs_mount_t *mp, |
| 228 | xfs_trans_t *tp, |
| 229 | xfs_ino_t ino, |
| 230 | xfs_dinode_t **dipp, |
| 231 | xfs_buf_t **bpp, |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 232 | int *offset, |
| 233 | uint imap_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | xfs_imap_t imap; |
| 236 | xfs_buf_t *bp; |
| 237 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | imap.im_blkno = 0; |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 240 | error = xfs_imap(mp, tp, ino, &imap, imap_flags | XFS_IMAP_LOOKUP); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 241 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 244 | error = xfs_imap_to_bp(mp, tp, &imap, &bp, XFS_BUF_LOCK, imap_flags); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 245 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); |
| 249 | *bpp = bp; |
| 250 | *offset = imap.im_boffset; |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | /* |
| 256 | * This routine is called to map an inode to the buffer containing |
| 257 | * the on-disk version of the inode. It returns a pointer to the |
| 258 | * buffer containing the on-disk inode in the bpp parameter, and in |
| 259 | * the dip parameter it returns a pointer to the on-disk inode within |
| 260 | * that buffer. |
| 261 | * |
| 262 | * If a non-zero error is returned, then the contents of bpp and |
| 263 | * dipp are undefined. |
| 264 | * |
| 265 | * If the inode is new and has not yet been initialized, use xfs_imap() |
| 266 | * to determine the size and location of the buffer to read from disk. |
| 267 | * If the inode has already been mapped to its buffer and read in once, |
| 268 | * then use the mapping information stored in the inode rather than |
| 269 | * calling xfs_imap(). This allows us to avoid the overhead of looking |
| 270 | * at the inode btree for small block file systems (see xfs_dilocate()). |
| 271 | * We can tell whether the inode has been mapped in before by comparing |
| 272 | * its disk block address to 0. Only uninitialized inodes will have |
| 273 | * 0 for the disk block address. |
| 274 | */ |
| 275 | int |
| 276 | xfs_itobp( |
| 277 | xfs_mount_t *mp, |
| 278 | xfs_trans_t *tp, |
| 279 | xfs_inode_t *ip, |
| 280 | xfs_dinode_t **dipp, |
| 281 | xfs_buf_t **bpp, |
Nathan Scott | b12dd34 | 2006-03-17 17:26:04 +1100 | [diff] [blame] | 282 | xfs_daddr_t bno, |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 283 | uint imap_flags, |
| 284 | uint buf_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Nathan Scott | 4d1a2ed | 2006-06-09 17:12:28 +1000 | [diff] [blame] | 286 | xfs_imap_t imap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | xfs_buf_t *bp; |
| 288 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | if (ip->i_blkno == (xfs_daddr_t)0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | imap.im_blkno = bno; |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 292 | error = xfs_imap(mp, tp, ip->i_ino, &imap, |
| 293 | XFS_IMAP_LOOKUP | imap_flags); |
| 294 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
| 297 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | * Fill in the fields in the inode that will be used to |
| 299 | * map the inode to its buffer from now on. |
| 300 | */ |
| 301 | ip->i_blkno = imap.im_blkno; |
| 302 | ip->i_len = imap.im_len; |
| 303 | ip->i_boffset = imap.im_boffset; |
| 304 | } else { |
| 305 | /* |
| 306 | * We've already mapped the inode once, so just use the |
| 307 | * mapping that we saved the first time. |
| 308 | */ |
| 309 | imap.im_blkno = ip->i_blkno; |
| 310 | imap.im_len = ip->i_len; |
| 311 | imap.im_boffset = ip->i_boffset; |
| 312 | } |
| 313 | ASSERT(bno == 0 || bno == imap.im_blkno); |
| 314 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 315 | error = xfs_imap_to_bp(mp, tp, &imap, &bp, buf_flags, imap_flags); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 316 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | return error; |
Nathan Scott | 4d1a2ed | 2006-06-09 17:12:28 +1000 | [diff] [blame] | 318 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 319 | if (!bp) { |
| 320 | ASSERT(buf_flags & XFS_BUF_TRYLOCK); |
| 321 | ASSERT(tp == NULL); |
| 322 | *bpp = NULL; |
| 323 | return EAGAIN; |
| 324 | } |
| 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); |
| 327 | *bpp = bp; |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Move inode type and inode format specific information from the |
| 333 | * on-disk inode to the in-core inode. For fifos, devs, and sockets |
| 334 | * this means set if_rdev to the proper value. For files, directories, |
| 335 | * and symlinks this means to bring in the in-line data or extent |
| 336 | * pointers. For a file in B-tree format, only the root is immediately |
| 337 | * brought in-core. The rest will be in-lined in if_extents when it |
| 338 | * is first referenced (see xfs_iread_extents()). |
| 339 | */ |
| 340 | STATIC int |
| 341 | xfs_iformat( |
| 342 | xfs_inode_t *ip, |
| 343 | xfs_dinode_t *dip) |
| 344 | { |
| 345 | xfs_attr_shortform_t *atp; |
| 346 | int size; |
| 347 | int error; |
| 348 | xfs_fsize_t di_size; |
| 349 | ip->i_df.if_ext_max = |
| 350 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 351 | error = 0; |
| 352 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 353 | if (unlikely(be32_to_cpu(dip->di_core.di_nextents) + |
| 354 | be16_to_cpu(dip->di_core.di_anextents) > |
| 355 | be64_to_cpu(dip->di_core.di_nblocks))) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 356 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 357 | "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | (unsigned long long)ip->i_ino, |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 359 | (int)(be32_to_cpu(dip->di_core.di_nextents) + |
| 360 | be16_to_cpu(dip->di_core.di_anextents)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | (unsigned long long) |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 362 | be64_to_cpu(dip->di_core.di_nblocks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW, |
| 364 | ip->i_mount, dip); |
| 365 | return XFS_ERROR(EFSCORRUPTED); |
| 366 | } |
| 367 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 368 | if (unlikely(dip->di_core.di_forkoff > ip->i_mount->m_sb.sb_inodesize)) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 369 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 370 | "corrupt dinode %Lu, forkoff = 0x%x.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | (unsigned long long)ip->i_ino, |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 372 | dip->di_core.di_forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW, |
| 374 | ip->i_mount, dip); |
| 375 | return XFS_ERROR(EFSCORRUPTED); |
| 376 | } |
| 377 | |
| 378 | switch (ip->i_d.di_mode & S_IFMT) { |
| 379 | case S_IFIFO: |
| 380 | case S_IFCHR: |
| 381 | case S_IFBLK: |
| 382 | case S_IFSOCK: |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 383 | if (unlikely(dip->di_core.di_format != XFS_DINODE_FMT_DEV)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW, |
| 385 | ip->i_mount, dip); |
| 386 | return XFS_ERROR(EFSCORRUPTED); |
| 387 | } |
| 388 | ip->i_d.di_size = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 389 | ip->i_size = 0; |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 390 | ip->i_df.if_u2.if_rdev = be32_to_cpu(dip->di_u.di_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | break; |
| 392 | |
| 393 | case S_IFREG: |
| 394 | case S_IFLNK: |
| 395 | case S_IFDIR: |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 396 | switch (dip->di_core.di_format) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | case XFS_DINODE_FMT_LOCAL: |
| 398 | /* |
| 399 | * no local regular files yet |
| 400 | */ |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 401 | if (unlikely((be16_to_cpu(dip->di_core.di_mode) & S_IFMT) == S_IFREG)) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 402 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 403 | "corrupt inode %Lu " |
| 404 | "(local format for regular file).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | (unsigned long long) ip->i_ino); |
| 406 | XFS_CORRUPTION_ERROR("xfs_iformat(4)", |
| 407 | XFS_ERRLEVEL_LOW, |
| 408 | ip->i_mount, dip); |
| 409 | return XFS_ERROR(EFSCORRUPTED); |
| 410 | } |
| 411 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 412 | di_size = be64_to_cpu(dip->di_core.di_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 414 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 415 | "corrupt inode %Lu " |
| 416 | "(bad size %Ld for local inode).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | (unsigned long long) ip->i_ino, |
| 418 | (long long) di_size); |
| 419 | XFS_CORRUPTION_ERROR("xfs_iformat(5)", |
| 420 | XFS_ERRLEVEL_LOW, |
| 421 | ip->i_mount, dip); |
| 422 | return XFS_ERROR(EFSCORRUPTED); |
| 423 | } |
| 424 | |
| 425 | size = (int)di_size; |
| 426 | error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, size); |
| 427 | break; |
| 428 | case XFS_DINODE_FMT_EXTENTS: |
| 429 | error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK); |
| 430 | break; |
| 431 | case XFS_DINODE_FMT_BTREE: |
| 432 | error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK); |
| 433 | break; |
| 434 | default: |
| 435 | XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW, |
| 436 | ip->i_mount); |
| 437 | return XFS_ERROR(EFSCORRUPTED); |
| 438 | } |
| 439 | break; |
| 440 | |
| 441 | default: |
| 442 | XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount); |
| 443 | return XFS_ERROR(EFSCORRUPTED); |
| 444 | } |
| 445 | if (error) { |
| 446 | return error; |
| 447 | } |
| 448 | if (!XFS_DFORK_Q(dip)) |
| 449 | return 0; |
| 450 | ASSERT(ip->i_afp == NULL); |
| 451 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); |
| 452 | ip->i_afp->if_ext_max = |
| 453 | XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 454 | switch (dip->di_core.di_aformat) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | case XFS_DINODE_FMT_LOCAL: |
| 456 | atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 457 | size = be16_to_cpu(atp->hdr.totsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size); |
| 459 | break; |
| 460 | case XFS_DINODE_FMT_EXTENTS: |
| 461 | error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK); |
| 462 | break; |
| 463 | case XFS_DINODE_FMT_BTREE: |
| 464 | error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK); |
| 465 | break; |
| 466 | default: |
| 467 | error = XFS_ERROR(EFSCORRUPTED); |
| 468 | break; |
| 469 | } |
| 470 | if (error) { |
| 471 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); |
| 472 | ip->i_afp = NULL; |
| 473 | xfs_idestroy_fork(ip, XFS_DATA_FORK); |
| 474 | } |
| 475 | return error; |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * The file is in-lined in the on-disk inode. |
| 480 | * If it fits into if_inline_data, then copy |
| 481 | * it there, otherwise allocate a buffer for it |
| 482 | * and copy the data there. Either way, set |
| 483 | * if_data to point at the data. |
| 484 | * If we allocate a buffer for the data, make |
| 485 | * sure that its size is a multiple of 4 and |
| 486 | * record the real size in i_real_bytes. |
| 487 | */ |
| 488 | STATIC int |
| 489 | xfs_iformat_local( |
| 490 | xfs_inode_t *ip, |
| 491 | xfs_dinode_t *dip, |
| 492 | int whichfork, |
| 493 | int size) |
| 494 | { |
| 495 | xfs_ifork_t *ifp; |
| 496 | int real_size; |
| 497 | |
| 498 | /* |
| 499 | * If the size is unreasonable, then something |
| 500 | * is wrong and we just bail out rather than crash in |
| 501 | * kmem_alloc() or memcpy() below. |
| 502 | */ |
| 503 | if (unlikely(size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 504 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 505 | "corrupt inode %Lu " |
| 506 | "(bad size %d for local fork, size = %d).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | (unsigned long long) ip->i_ino, size, |
| 508 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork)); |
| 509 | XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW, |
| 510 | ip->i_mount, dip); |
| 511 | return XFS_ERROR(EFSCORRUPTED); |
| 512 | } |
| 513 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 514 | real_size = 0; |
| 515 | if (size == 0) |
| 516 | ifp->if_u1.if_data = NULL; |
| 517 | else if (size <= sizeof(ifp->if_u2.if_inline_data)) |
| 518 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 519 | else { |
| 520 | real_size = roundup(size, 4); |
| 521 | ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP); |
| 522 | } |
| 523 | ifp->if_bytes = size; |
| 524 | ifp->if_real_bytes = real_size; |
| 525 | if (size) |
| 526 | memcpy(ifp->if_u1.if_data, XFS_DFORK_PTR(dip, whichfork), size); |
| 527 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 528 | ifp->if_flags |= XFS_IFINLINE; |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | /* |
| 533 | * The file consists of a set of extents all |
| 534 | * of which fit into the on-disk inode. |
| 535 | * If there are few enough extents to fit into |
| 536 | * the if_inline_ext, then copy them there. |
| 537 | * Otherwise allocate a buffer for them and copy |
| 538 | * them into it. Either way, set if_extents |
| 539 | * to point at the extents. |
| 540 | */ |
| 541 | STATIC int |
| 542 | xfs_iformat_extents( |
| 543 | xfs_inode_t *ip, |
| 544 | xfs_dinode_t *dip, |
| 545 | int whichfork) |
| 546 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 547 | xfs_bmbt_rec_t *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | xfs_ifork_t *ifp; |
| 549 | int nex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | int size; |
| 551 | int i; |
| 552 | |
| 553 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 554 | nex = XFS_DFORK_NEXTENTS(dip, whichfork); |
| 555 | size = nex * (uint)sizeof(xfs_bmbt_rec_t); |
| 556 | |
| 557 | /* |
| 558 | * If the number of extents is unreasonable, then something |
| 559 | * is wrong and we just bail out rather than crash in |
| 560 | * kmem_alloc() or memcpy() below. |
| 561 | */ |
| 562 | if (unlikely(size < 0 || size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 563 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 564 | "corrupt inode %Lu ((a)extents = %d).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | (unsigned long long) ip->i_ino, nex); |
| 566 | XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW, |
| 567 | ip->i_mount, dip); |
| 568 | return XFS_ERROR(EFSCORRUPTED); |
| 569 | } |
| 570 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 571 | ifp->if_real_bytes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (nex == 0) |
| 573 | ifp->if_u1.if_extents = NULL; |
| 574 | else if (nex <= XFS_INLINE_EXTS) |
| 575 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 576 | else |
| 577 | xfs_iext_add(ifp, 0, nex); |
| 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | ifp->if_bytes = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (size) { |
| 581 | dp = (xfs_bmbt_rec_t *) XFS_DFORK_PTR(dip, whichfork); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 582 | xfs_validate_extents(ifp, nex, XFS_EXTFMT_INODE(ip)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 583 | for (i = 0; i < nex; i++, dp++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 584 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
Harvey Harrison | 597bca6 | 2008-08-13 16:29:21 +1000 | [diff] [blame] | 585 | ep->l0 = get_unaligned_be64(&dp->l0); |
| 586 | ep->l1 = get_unaligned_be64(&dp->l1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 588 | XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | if (whichfork != XFS_DATA_FORK || |
| 590 | XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE) |
| 591 | if (unlikely(xfs_check_nostate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 592 | ifp, 0, nex))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | XFS_ERROR_REPORT("xfs_iformat_extents(2)", |
| 594 | XFS_ERRLEVEL_LOW, |
| 595 | ip->i_mount); |
| 596 | return XFS_ERROR(EFSCORRUPTED); |
| 597 | } |
| 598 | } |
| 599 | ifp->if_flags |= XFS_IFEXTENTS; |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | /* |
| 604 | * The file has too many extents to fit into |
| 605 | * the inode, so they are in B-tree format. |
| 606 | * Allocate a buffer for the root of the B-tree |
| 607 | * and copy the root into it. The i_extents |
| 608 | * field will remain NULL until all of the |
| 609 | * extents are read in (when they are needed). |
| 610 | */ |
| 611 | STATIC int |
| 612 | xfs_iformat_btree( |
| 613 | xfs_inode_t *ip, |
| 614 | xfs_dinode_t *dip, |
| 615 | int whichfork) |
| 616 | { |
| 617 | xfs_bmdr_block_t *dfp; |
| 618 | xfs_ifork_t *ifp; |
| 619 | /* REFERENCED */ |
| 620 | int nrecs; |
| 621 | int size; |
| 622 | |
| 623 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 624 | dfp = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork); |
| 625 | size = XFS_BMAP_BROOT_SPACE(dfp); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 626 | nrecs = be16_to_cpu(dfp->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
| 628 | /* |
| 629 | * blow out if -- fork has less extents than can fit in |
| 630 | * fork (fork shouldn't be a btree format), root btree |
| 631 | * block has more records than can fit into the fork, |
| 632 | * or the number of extents is greater than the number of |
| 633 | * blocks. |
| 634 | */ |
| 635 | if (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max |
| 636 | || XFS_BMDR_SPACE_CALC(nrecs) > |
| 637 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork) |
| 638 | || XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks)) { |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 639 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| 640 | "corrupt inode %Lu (btree).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | (unsigned long long) ip->i_ino); |
| 642 | XFS_ERROR_REPORT("xfs_iformat_btree", XFS_ERRLEVEL_LOW, |
| 643 | ip->i_mount); |
| 644 | return XFS_ERROR(EFSCORRUPTED); |
| 645 | } |
| 646 | |
| 647 | ifp->if_broot_bytes = size; |
| 648 | ifp->if_broot = kmem_alloc(size, KM_SLEEP); |
| 649 | ASSERT(ifp->if_broot != NULL); |
| 650 | /* |
| 651 | * Copy and convert from the on-disk structure |
| 652 | * to the in-memory structure. |
| 653 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 654 | xfs_bmdr_to_bmbt(ip->i_mount, dfp, |
| 655 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork), |
| 656 | ifp->if_broot, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 658 | ifp->if_flags |= XFS_IFBROOT; |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | void |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 664 | xfs_dinode_from_disk( |
| 665 | xfs_icdinode_t *to, |
| 666 | xfs_dinode_core_t *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 668 | to->di_magic = be16_to_cpu(from->di_magic); |
| 669 | to->di_mode = be16_to_cpu(from->di_mode); |
| 670 | to->di_version = from ->di_version; |
| 671 | to->di_format = from->di_format; |
| 672 | to->di_onlink = be16_to_cpu(from->di_onlink); |
| 673 | to->di_uid = be32_to_cpu(from->di_uid); |
| 674 | to->di_gid = be32_to_cpu(from->di_gid); |
| 675 | to->di_nlink = be32_to_cpu(from->di_nlink); |
| 676 | to->di_projid = be16_to_cpu(from->di_projid); |
| 677 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
| 678 | to->di_flushiter = be16_to_cpu(from->di_flushiter); |
| 679 | to->di_atime.t_sec = be32_to_cpu(from->di_atime.t_sec); |
| 680 | to->di_atime.t_nsec = be32_to_cpu(from->di_atime.t_nsec); |
| 681 | to->di_mtime.t_sec = be32_to_cpu(from->di_mtime.t_sec); |
| 682 | to->di_mtime.t_nsec = be32_to_cpu(from->di_mtime.t_nsec); |
| 683 | to->di_ctime.t_sec = be32_to_cpu(from->di_ctime.t_sec); |
| 684 | to->di_ctime.t_nsec = be32_to_cpu(from->di_ctime.t_nsec); |
| 685 | to->di_size = be64_to_cpu(from->di_size); |
| 686 | to->di_nblocks = be64_to_cpu(from->di_nblocks); |
| 687 | to->di_extsize = be32_to_cpu(from->di_extsize); |
| 688 | to->di_nextents = be32_to_cpu(from->di_nextents); |
| 689 | to->di_anextents = be16_to_cpu(from->di_anextents); |
| 690 | to->di_forkoff = from->di_forkoff; |
| 691 | to->di_aformat = from->di_aformat; |
| 692 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); |
| 693 | to->di_dmstate = be16_to_cpu(from->di_dmstate); |
| 694 | to->di_flags = be16_to_cpu(from->di_flags); |
| 695 | to->di_gen = be32_to_cpu(from->di_gen); |
| 696 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 698 | void |
| 699 | xfs_dinode_to_disk( |
| 700 | xfs_dinode_core_t *to, |
| 701 | xfs_icdinode_t *from) |
| 702 | { |
| 703 | to->di_magic = cpu_to_be16(from->di_magic); |
| 704 | to->di_mode = cpu_to_be16(from->di_mode); |
| 705 | to->di_version = from ->di_version; |
| 706 | to->di_format = from->di_format; |
| 707 | to->di_onlink = cpu_to_be16(from->di_onlink); |
| 708 | to->di_uid = cpu_to_be32(from->di_uid); |
| 709 | to->di_gid = cpu_to_be32(from->di_gid); |
| 710 | to->di_nlink = cpu_to_be32(from->di_nlink); |
| 711 | to->di_projid = cpu_to_be16(from->di_projid); |
| 712 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
| 713 | to->di_flushiter = cpu_to_be16(from->di_flushiter); |
| 714 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); |
| 715 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); |
| 716 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); |
| 717 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); |
| 718 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); |
| 719 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); |
| 720 | to->di_size = cpu_to_be64(from->di_size); |
| 721 | to->di_nblocks = cpu_to_be64(from->di_nblocks); |
| 722 | to->di_extsize = cpu_to_be32(from->di_extsize); |
| 723 | to->di_nextents = cpu_to_be32(from->di_nextents); |
| 724 | to->di_anextents = cpu_to_be16(from->di_anextents); |
| 725 | to->di_forkoff = from->di_forkoff; |
| 726 | to->di_aformat = from->di_aformat; |
| 727 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); |
| 728 | to->di_dmstate = cpu_to_be16(from->di_dmstate); |
| 729 | to->di_flags = cpu_to_be16(from->di_flags); |
| 730 | to->di_gen = cpu_to_be32(from->di_gen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | STATIC uint |
| 734 | _xfs_dic2xflags( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | __uint16_t di_flags) |
| 736 | { |
| 737 | uint flags = 0; |
| 738 | |
| 739 | if (di_flags & XFS_DIFLAG_ANY) { |
| 740 | if (di_flags & XFS_DIFLAG_REALTIME) |
| 741 | flags |= XFS_XFLAG_REALTIME; |
| 742 | if (di_flags & XFS_DIFLAG_PREALLOC) |
| 743 | flags |= XFS_XFLAG_PREALLOC; |
| 744 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 745 | flags |= XFS_XFLAG_IMMUTABLE; |
| 746 | if (di_flags & XFS_DIFLAG_APPEND) |
| 747 | flags |= XFS_XFLAG_APPEND; |
| 748 | if (di_flags & XFS_DIFLAG_SYNC) |
| 749 | flags |= XFS_XFLAG_SYNC; |
| 750 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 751 | flags |= XFS_XFLAG_NOATIME; |
| 752 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 753 | flags |= XFS_XFLAG_NODUMP; |
| 754 | if (di_flags & XFS_DIFLAG_RTINHERIT) |
| 755 | flags |= XFS_XFLAG_RTINHERIT; |
| 756 | if (di_flags & XFS_DIFLAG_PROJINHERIT) |
| 757 | flags |= XFS_XFLAG_PROJINHERIT; |
| 758 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) |
| 759 | flags |= XFS_XFLAG_NOSYMLINKS; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 760 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
| 761 | flags |= XFS_XFLAG_EXTSIZE; |
| 762 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) |
| 763 | flags |= XFS_XFLAG_EXTSZINHERIT; |
Barry Naujok | d3446ea | 2006-06-09 14:54:19 +1000 | [diff] [blame] | 764 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
| 765 | flags |= XFS_XFLAG_NODEFRAG; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 766 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
| 767 | flags |= XFS_XFLAG_FILESTREAM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | } |
| 769 | |
| 770 | return flags; |
| 771 | } |
| 772 | |
| 773 | uint |
| 774 | xfs_ip2xflags( |
| 775 | xfs_inode_t *ip) |
| 776 | { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 777 | xfs_icdinode_t *dic = &ip->i_d; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Nathan Scott | a916e2b | 2006-06-09 17:12:17 +1000 | [diff] [blame] | 779 | return _xfs_dic2xflags(dic->di_flags) | |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 780 | (XFS_IFORK_Q(ip) ? XFS_XFLAG_HASATTR : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | uint |
| 784 | xfs_dic2xflags( |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 785 | xfs_dinode_t *dip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | { |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 787 | xfs_dinode_core_t *dic = &dip->di_core; |
| 788 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 789 | return _xfs_dic2xflags(be16_to_cpu(dic->di_flags)) | |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 790 | (XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
| 792 | |
| 793 | /* |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 794 | * Allocate and initialise an xfs_inode. |
| 795 | */ |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 796 | STATIC struct xfs_inode * |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 797 | xfs_inode_alloc( |
| 798 | struct xfs_mount *mp, |
| 799 | xfs_ino_t ino) |
| 800 | { |
| 801 | struct xfs_inode *ip; |
| 802 | |
| 803 | /* |
| 804 | * if this didn't occur in transactions, we could use |
| 805 | * KM_MAYFAIL and return NULL here on ENOMEM. Set the |
| 806 | * code up to do this anyway. |
| 807 | */ |
| 808 | ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP); |
| 809 | if (!ip) |
| 810 | return NULL; |
| 811 | |
| 812 | ASSERT(atomic_read(&ip->i_iocount) == 0); |
| 813 | ASSERT(atomic_read(&ip->i_pincount) == 0); |
| 814 | ASSERT(!spin_is_locked(&ip->i_flags_lock)); |
David Chinner | 1165451 | 2008-10-30 17:37:49 +1100 | [diff] [blame] | 815 | ASSERT(completion_done(&ip->i_flush)); |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 816 | |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 817 | /* |
| 818 | * initialise the VFS inode here to get failures |
| 819 | * out of the way early. |
| 820 | */ |
| 821 | if (!inode_init_always(mp->m_super, VFS_I(ip))) { |
| 822 | kmem_zone_free(xfs_inode_zone, ip); |
| 823 | return NULL; |
| 824 | } |
| 825 | |
| 826 | /* initialise the xfs inode */ |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 827 | ip->i_ino = ino; |
| 828 | ip->i_mount = mp; |
| 829 | ip->i_blkno = 0; |
| 830 | ip->i_len = 0; |
| 831 | ip->i_boffset =0; |
| 832 | ip->i_afp = NULL; |
| 833 | memset(&ip->i_df, 0, sizeof(xfs_ifork_t)); |
| 834 | ip->i_flags = 0; |
| 835 | ip->i_update_core = 0; |
| 836 | ip->i_update_size = 0; |
| 837 | ip->i_delayed_blks = 0; |
| 838 | memset(&ip->i_d, 0, sizeof(xfs_icdinode_t)); |
| 839 | ip->i_size = 0; |
| 840 | ip->i_new_size = 0; |
| 841 | |
| 842 | /* |
| 843 | * Initialize inode's trace buffers. |
| 844 | */ |
| 845 | #ifdef XFS_INODE_TRACE |
| 846 | ip->i_trace = ktrace_alloc(INODE_TRACE_SIZE, KM_NOFS); |
| 847 | #endif |
| 848 | #ifdef XFS_BMAP_TRACE |
| 849 | ip->i_xtrace = ktrace_alloc(XFS_BMAP_KTRACE_SIZE, KM_NOFS); |
| 850 | #endif |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 851 | #ifdef XFS_BTREE_TRACE |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 852 | ip->i_btrace = ktrace_alloc(XFS_BMBT_KTRACE_SIZE, KM_NOFS); |
| 853 | #endif |
| 854 | #ifdef XFS_RW_TRACE |
| 855 | ip->i_rwtrace = ktrace_alloc(XFS_RW_KTRACE_SIZE, KM_NOFS); |
| 856 | #endif |
| 857 | #ifdef XFS_ILOCK_TRACE |
| 858 | ip->i_lock_trace = ktrace_alloc(XFS_ILOCK_KTRACE_SIZE, KM_NOFS); |
| 859 | #endif |
| 860 | #ifdef XFS_DIR2_TRACE |
| 861 | ip->i_dir_trace = ktrace_alloc(XFS_DIR2_KTRACE_SIZE, KM_NOFS); |
| 862 | #endif |
| 863 | |
| 864 | return ip; |
| 865 | } |
| 866 | |
| 867 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | * Given a mount structure and an inode number, return a pointer |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 869 | * to a newly allocated in-core inode corresponding to the given |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | * inode number. |
| 871 | * |
| 872 | * Initialize the inode's attributes and extent pointers if it |
| 873 | * already has them (it will not if the inode has no links). |
| 874 | */ |
| 875 | int |
| 876 | xfs_iread( |
| 877 | xfs_mount_t *mp, |
| 878 | xfs_trans_t *tp, |
| 879 | xfs_ino_t ino, |
| 880 | xfs_inode_t **ipp, |
Nathan Scott | 745b1f47 | 2006-09-28 11:02:23 +1000 | [diff] [blame] | 881 | xfs_daddr_t bno, |
| 882 | uint imap_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | { |
| 884 | xfs_buf_t *bp; |
| 885 | xfs_dinode_t *dip; |
| 886 | xfs_inode_t *ip; |
| 887 | int error; |
| 888 | |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 889 | ip = xfs_inode_alloc(mp, ino); |
| 890 | if (!ip) |
| 891 | return ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | /* |
| 894 | * Get pointer's to the on-disk inode and the buffer containing it. |
| 895 | * If the inode number refers to a block outside the file system |
| 896 | * then xfs_itobp() will return NULL. In this case we should |
| 897 | * return NULL as well. Set i_blkno to 0 so that xfs_itobp() will |
| 898 | * know that this is a new incore inode. |
| 899 | */ |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 900 | error = xfs_itobp(mp, tp, ip, &dip, &bp, bno, imap_flags, XFS_BUF_LOCK); |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 901 | if (error) |
| 902 | goto out_destroy_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | * If we got something that isn't an inode it means someone |
| 906 | * (nfs or dmi) has a stale handle. |
| 907 | */ |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 908 | if (be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | #ifdef DEBUG |
| 910 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: " |
| 911 | "dip->di_core.di_magic (0x%x) != " |
| 912 | "XFS_DINODE_MAGIC (0x%x)", |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 913 | be16_to_cpu(dip->di_core.di_magic), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | XFS_DINODE_MAGIC); |
| 915 | #endif /* DEBUG */ |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 916 | error = XFS_ERROR(EINVAL); |
| 917 | goto out_brelse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } |
| 919 | |
| 920 | /* |
| 921 | * If the on-disk inode is already linked to a directory |
| 922 | * entry, copy all of the inode into the in-core inode. |
| 923 | * xfs_iformat() handles copying in the inode format |
| 924 | * specific information. |
| 925 | * Otherwise, just get the truly permanent information. |
| 926 | */ |
| 927 | if (dip->di_core.di_mode) { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 928 | xfs_dinode_from_disk(&ip->i_d, &dip->di_core); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | error = xfs_iformat(ip, dip); |
| 930 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | #ifdef DEBUG |
| 932 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: " |
| 933 | "xfs_iformat() returned error %d", |
| 934 | error); |
| 935 | #endif /* DEBUG */ |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 936 | goto out_brelse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | } else { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 939 | ip->i_d.di_magic = be16_to_cpu(dip->di_core.di_magic); |
| 940 | ip->i_d.di_version = dip->di_core.di_version; |
| 941 | ip->i_d.di_gen = be32_to_cpu(dip->di_core.di_gen); |
| 942 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_core.di_flushiter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | /* |
| 944 | * Make sure to pull in the mode here as well in |
| 945 | * case the inode is released without being used. |
| 946 | * This ensures that xfs_inactive() will see that |
| 947 | * the inode is already free and not try to mess |
| 948 | * with the uninitialized part of it. |
| 949 | */ |
| 950 | ip->i_d.di_mode = 0; |
| 951 | /* |
| 952 | * Initialize the per-fork minima and maxima for a new |
| 953 | * inode here. xfs_iformat will do it for old inodes. |
| 954 | */ |
| 955 | ip->i_df.if_ext_max = |
| 956 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 957 | } |
| 958 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | /* |
| 960 | * The inode format changed when we moved the link count and |
| 961 | * made it 32 bits long. If this is an old format inode, |
| 962 | * convert it in memory to look like a new one. If it gets |
| 963 | * flushed to disk we will convert back before flushing or |
| 964 | * logging it. We zero out the new projid field and the old link |
| 965 | * count field. We'll handle clearing the pad field (the remains |
| 966 | * of the old uuid field) when we actually convert the inode to |
| 967 | * the new format. We don't change the version number so that we |
| 968 | * can distinguish this from a real new format inode. |
| 969 | */ |
| 970 | if (ip->i_d.di_version == XFS_DINODE_VERSION_1) { |
| 971 | ip->i_d.di_nlink = ip->i_d.di_onlink; |
| 972 | ip->i_d.di_onlink = 0; |
| 973 | ip->i_d.di_projid = 0; |
| 974 | } |
| 975 | |
| 976 | ip->i_delayed_blks = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 977 | ip->i_size = ip->i_d.di_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
| 979 | /* |
| 980 | * Mark the buffer containing the inode as something to keep |
| 981 | * around for a while. This helps to keep recently accessed |
| 982 | * meta-data in-core longer. |
| 983 | */ |
| 984 | XFS_BUF_SET_REF(bp, XFS_INO_REF); |
| 985 | |
| 986 | /* |
| 987 | * Use xfs_trans_brelse() to release the buffer containing the |
| 988 | * on-disk inode, because it was acquired with xfs_trans_read_buf() |
| 989 | * in xfs_itobp() above. If tp is NULL, this is just a normal |
| 990 | * brelse(). If we're within a transaction, then xfs_trans_brelse() |
| 991 | * will only release the buffer if it is not dirty within the |
| 992 | * transaction. It will be OK to release the buffer in this case, |
| 993 | * because inodes on disk are never destroyed and we will be |
| 994 | * locking the new in-core inode before putting it in the hash |
| 995 | * table where other processes can find it. Thus we don't have |
| 996 | * to worry about the inode being changed just because we released |
| 997 | * the buffer. |
| 998 | */ |
| 999 | xfs_trans_brelse(tp, bp); |
| 1000 | *ipp = ip; |
| 1001 | return 0; |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 1002 | |
| 1003 | out_brelse: |
| 1004 | xfs_trans_brelse(tp, bp); |
| 1005 | out_destroy_inode: |
| 1006 | xfs_destroy_inode(ip); |
| 1007 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * Read in extents from a btree-format inode. |
| 1012 | * Allocate and fill in if_extents. Real work is done in xfs_bmap.c. |
| 1013 | */ |
| 1014 | int |
| 1015 | xfs_iread_extents( |
| 1016 | xfs_trans_t *tp, |
| 1017 | xfs_inode_t *ip, |
| 1018 | int whichfork) |
| 1019 | { |
| 1020 | int error; |
| 1021 | xfs_ifork_t *ifp; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1022 | xfs_extnum_t nextents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | size_t size; |
| 1024 | |
| 1025 | if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { |
| 1026 | XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW, |
| 1027 | ip->i_mount); |
| 1028 | return XFS_ERROR(EFSCORRUPTED); |
| 1029 | } |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1030 | nextents = XFS_IFORK_NEXTENTS(ip, whichfork); |
| 1031 | size = nextents * sizeof(xfs_bmbt_rec_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | ifp = XFS_IFORK_PTR(ip, whichfork); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1033 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | /* |
| 1035 | * We know that the size is valid (it's checked in iformat_btree) |
| 1036 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | ifp->if_lastex = NULLEXTNUM; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1038 | ifp->if_bytes = ifp->if_real_bytes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | ifp->if_flags |= XFS_IFEXTENTS; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1040 | xfs_iext_add(ifp, 0, nextents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | error = xfs_bmap_read_extents(tp, ip, whichfork); |
| 1042 | if (error) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1043 | xfs_iext_destroy(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 1045 | return error; |
| 1046 | } |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 1047 | xfs_validate_extents(ifp, nextents, XFS_EXTFMT_INODE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | return 0; |
| 1049 | } |
| 1050 | |
| 1051 | /* |
| 1052 | * Allocate an inode on disk and return a copy of its in-core version. |
| 1053 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev |
| 1054 | * appropriately within the inode. The uid and gid for the inode are |
| 1055 | * set according to the contents of the given cred structure. |
| 1056 | * |
| 1057 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() |
| 1058 | * has a free inode available, call xfs_iget() |
| 1059 | * to obtain the in-core version of the allocated inode. Finally, |
| 1060 | * fill in the inode and log its initial contents. In this case, |
| 1061 | * ialloc_context would be set to NULL and call_again set to false. |
| 1062 | * |
| 1063 | * If xfs_dialloc() does not have an available inode, |
| 1064 | * it will replenish its supply by doing an allocation. Since we can |
| 1065 | * only do one allocation within a transaction without deadlocks, we |
| 1066 | * must commit the current transaction before returning the inode itself. |
| 1067 | * In this case, therefore, we will set call_again to true and return. |
| 1068 | * The caller should then commit the current transaction, start a new |
| 1069 | * transaction, and call xfs_ialloc() again to actually get the inode. |
| 1070 | * |
| 1071 | * To ensure that some other process does not grab the inode that |
| 1072 | * was allocated during the first call to xfs_ialloc(), this routine |
| 1073 | * also returns the [locked] bp pointing to the head of the freelist |
| 1074 | * as ialloc_context. The caller should hold this buffer across |
| 1075 | * the commit and pass it back into this routine on the second call. |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 1076 | * |
| 1077 | * If we are allocating quota inodes, we do not have a parent inode |
| 1078 | * to attach to or associate with (i.e. pip == NULL) because they |
| 1079 | * are not linked into the directory structure - they are attached |
| 1080 | * directly to the superblock - and so have no parent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | */ |
| 1082 | int |
| 1083 | xfs_ialloc( |
| 1084 | xfs_trans_t *tp, |
| 1085 | xfs_inode_t *pip, |
| 1086 | mode_t mode, |
Nathan Scott | 31b084a | 2005-05-05 13:25:00 -0700 | [diff] [blame] | 1087 | xfs_nlink_t nlink, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | xfs_dev_t rdev, |
| 1089 | cred_t *cr, |
| 1090 | xfs_prid_t prid, |
| 1091 | int okalloc, |
| 1092 | xfs_buf_t **ialloc_context, |
| 1093 | boolean_t *call_again, |
| 1094 | xfs_inode_t **ipp) |
| 1095 | { |
| 1096 | xfs_ino_t ino; |
| 1097 | xfs_inode_t *ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | uint flags; |
| 1099 | int error; |
Christoph Hellwig | dff35fd | 2008-08-13 16:44:15 +1000 | [diff] [blame] | 1100 | timespec_t tv; |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1101 | int filestreams = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | |
| 1103 | /* |
| 1104 | * Call the space management code to pick |
| 1105 | * the on-disk inode to be allocated. |
| 1106 | */ |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 1107 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | ialloc_context, call_again, &ino); |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1109 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (*call_again || ino == NULLFSINO) { |
| 1112 | *ipp = NULL; |
| 1113 | return 0; |
| 1114 | } |
| 1115 | ASSERT(*ialloc_context == NULL); |
| 1116 | |
| 1117 | /* |
| 1118 | * Get the in-core inode with the lock held exclusively. |
| 1119 | * This is because we're setting fields here we need |
| 1120 | * to prevent others from looking at until we're done. |
| 1121 | */ |
| 1122 | error = xfs_trans_iget(tp->t_mountp, tp, ino, |
Nathan Scott | 745b1f47 | 2006-09-28 11:02:23 +1000 | [diff] [blame] | 1123 | XFS_IGET_CREATE, XFS_ILOCK_EXCL, &ip); |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1124 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | ASSERT(ip != NULL); |
| 1127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | ip->i_d.di_mode = (__uint16_t)mode; |
| 1129 | ip->i_d.di_onlink = 0; |
| 1130 | ip->i_d.di_nlink = nlink; |
| 1131 | ASSERT(ip->i_d.di_nlink == nlink); |
David Howells | 9e2b2dc | 2008-08-13 16:20:04 +0100 | [diff] [blame] | 1132 | ip->i_d.di_uid = current_fsuid(); |
| 1133 | ip->i_d.di_gid = current_fsgid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | ip->i_d.di_projid = prid; |
| 1135 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
| 1136 | |
| 1137 | /* |
| 1138 | * If the superblock version is up to where we support new format |
| 1139 | * inodes and this is currently an old format inode, then change |
| 1140 | * the inode version number now. This way we only do the conversion |
| 1141 | * here rather than here and in the flush/logging code. |
| 1142 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 1143 | if (xfs_sb_version_hasnlink(&tp->t_mountp->m_sb) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | ip->i_d.di_version == XFS_DINODE_VERSION_1) { |
| 1145 | ip->i_d.di_version = XFS_DINODE_VERSION_2; |
| 1146 | /* |
| 1147 | * We've already zeroed the old link count, the projid field, |
| 1148 | * and the pad field. |
| 1149 | */ |
| 1150 | } |
| 1151 | |
| 1152 | /* |
| 1153 | * Project ids won't be stored on disk if we are using a version 1 inode. |
| 1154 | */ |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1155 | if ((prid != 0) && (ip->i_d.di_version == XFS_DINODE_VERSION_1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | xfs_bump_ino_vers2(tp, ip); |
| 1157 | |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 1158 | if (pip && XFS_INHERIT_GID(pip)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | ip->i_d.di_gid = pip->i_d.di_gid; |
| 1160 | if ((pip->i_d.di_mode & S_ISGID) && (mode & S_IFMT) == S_IFDIR) { |
| 1161 | ip->i_d.di_mode |= S_ISGID; |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | /* |
| 1166 | * If the group ID of the new file does not match the effective group |
| 1167 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared |
| 1168 | * (and only if the irix_sgid_inherit compatibility variable is set). |
| 1169 | */ |
| 1170 | if ((irix_sgid_inherit) && |
| 1171 | (ip->i_d.di_mode & S_ISGID) && |
| 1172 | (!in_group_p((gid_t)ip->i_d.di_gid))) { |
| 1173 | ip->i_d.di_mode &= ~S_ISGID; |
| 1174 | } |
| 1175 | |
| 1176 | ip->i_d.di_size = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1177 | ip->i_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | ip->i_d.di_nextents = 0; |
| 1179 | ASSERT(ip->i_d.di_nblocks == 0); |
Christoph Hellwig | dff35fd | 2008-08-13 16:44:15 +1000 | [diff] [blame] | 1180 | |
| 1181 | nanotime(&tv); |
| 1182 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; |
| 1183 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; |
| 1184 | ip->i_d.di_atime = ip->i_d.di_mtime; |
| 1185 | ip->i_d.di_ctime = ip->i_d.di_mtime; |
| 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | /* |
| 1188 | * di_gen will have been taken care of in xfs_iread. |
| 1189 | */ |
| 1190 | ip->i_d.di_extsize = 0; |
| 1191 | ip->i_d.di_dmevmask = 0; |
| 1192 | ip->i_d.di_dmstate = 0; |
| 1193 | ip->i_d.di_flags = 0; |
| 1194 | flags = XFS_ILOG_CORE; |
| 1195 | switch (mode & S_IFMT) { |
| 1196 | case S_IFIFO: |
| 1197 | case S_IFCHR: |
| 1198 | case S_IFBLK: |
| 1199 | case S_IFSOCK: |
| 1200 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; |
| 1201 | ip->i_df.if_u2.if_rdev = rdev; |
| 1202 | ip->i_df.if_flags = 0; |
| 1203 | flags |= XFS_ILOG_DEV; |
| 1204 | break; |
| 1205 | case S_IFREG: |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1206 | /* |
| 1207 | * we can't set up filestreams until after the VFS inode |
| 1208 | * is set up properly. |
| 1209 | */ |
| 1210 | if (pip && xfs_inode_is_filestream(pip)) |
| 1211 | filestreams = 1; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1212 | /* fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | case S_IFDIR: |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 1214 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1215 | uint di_flags = 0; |
| 1216 | |
| 1217 | if ((mode & S_IFMT) == S_IFDIR) { |
| 1218 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
| 1219 | di_flags |= XFS_DIFLAG_RTINHERIT; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1220 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
| 1221 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| 1222 | ip->i_d.di_extsize = pip->i_d.di_extsize; |
| 1223 | } |
| 1224 | } else if ((mode & S_IFMT) == S_IFREG) { |
Christoph Hellwig | 613d704 | 2007-10-11 17:44:08 +1000 | [diff] [blame] | 1225 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1226 | di_flags |= XFS_DIFLAG_REALTIME; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1227 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
| 1228 | di_flags |= XFS_DIFLAG_EXTSIZE; |
| 1229 | ip->i_d.di_extsize = pip->i_d.di_extsize; |
| 1230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | } |
| 1232 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && |
| 1233 | xfs_inherit_noatime) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1234 | di_flags |= XFS_DIFLAG_NOATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
| 1236 | xfs_inherit_nodump) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1237 | di_flags |= XFS_DIFLAG_NODUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
| 1239 | xfs_inherit_sync) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1240 | di_flags |= XFS_DIFLAG_SYNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
| 1242 | xfs_inherit_nosymlinks) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1243 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| 1244 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 1245 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
Barry Naujok | d3446ea | 2006-06-09 14:54:19 +1000 | [diff] [blame] | 1246 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
| 1247 | xfs_inherit_nodefrag) |
| 1248 | di_flags |= XFS_DIFLAG_NODEFRAG; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1249 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
| 1250 | di_flags |= XFS_DIFLAG_FILESTREAM; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1251 | ip->i_d.di_flags |= di_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | } |
| 1253 | /* FALLTHROUGH */ |
| 1254 | case S_IFLNK: |
| 1255 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
| 1256 | ip->i_df.if_flags = XFS_IFEXTENTS; |
| 1257 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; |
| 1258 | ip->i_df.if_u1.if_extents = NULL; |
| 1259 | break; |
| 1260 | default: |
| 1261 | ASSERT(0); |
| 1262 | } |
| 1263 | /* |
| 1264 | * Attribute fork settings for new inode. |
| 1265 | */ |
| 1266 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| 1267 | ip->i_d.di_anextents = 0; |
| 1268 | |
| 1269 | /* |
| 1270 | * Log the new values stuffed into the inode. |
| 1271 | */ |
| 1272 | xfs_trans_log_inode(tp, ip, flags); |
| 1273 | |
Nathan Scott | b83bd13 | 2006-06-09 16:48:30 +1000 | [diff] [blame] | 1274 | /* now that we have an i_mode we can setup inode ops and unlock */ |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1275 | xfs_setup_inode(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1277 | /* now we have set up the vfs inode we can associate the filestream */ |
| 1278 | if (filestreams) { |
| 1279 | error = xfs_filestream_associate(pip, ip); |
| 1280 | if (error < 0) |
| 1281 | return -error; |
| 1282 | if (!error) |
| 1283 | xfs_iflags_set(ip, XFS_IFILESTREAM); |
| 1284 | } |
| 1285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | *ipp = ip; |
| 1287 | return 0; |
| 1288 | } |
| 1289 | |
| 1290 | /* |
| 1291 | * Check to make sure that there are no blocks allocated to the |
| 1292 | * file beyond the size of the file. We don't check this for |
| 1293 | * files with fixed size extents or real time extents, but we |
| 1294 | * at least do it for regular files. |
| 1295 | */ |
| 1296 | #ifdef DEBUG |
| 1297 | void |
| 1298 | xfs_isize_check( |
| 1299 | xfs_mount_t *mp, |
| 1300 | xfs_inode_t *ip, |
| 1301 | xfs_fsize_t isize) |
| 1302 | { |
| 1303 | xfs_fileoff_t map_first; |
| 1304 | int nimaps; |
| 1305 | xfs_bmbt_irec_t imaps[2]; |
| 1306 | |
| 1307 | if ((ip->i_d.di_mode & S_IFMT) != S_IFREG) |
| 1308 | return; |
| 1309 | |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 1310 | if (XFS_IS_REALTIME_INODE(ip)) |
| 1311 | return; |
| 1312 | |
| 1313 | if (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return; |
| 1315 | |
| 1316 | nimaps = 2; |
| 1317 | map_first = XFS_B_TO_FSB(mp, (xfs_ufsize_t)isize); |
| 1318 | /* |
| 1319 | * The filesystem could be shutting down, so bmapi may return |
| 1320 | * an error. |
| 1321 | */ |
| 1322 | if (xfs_bmapi(NULL, ip, map_first, |
| 1323 | (XFS_B_TO_FSB(mp, |
| 1324 | (xfs_ufsize_t)XFS_MAXIOFFSET(mp)) - |
| 1325 | map_first), |
| 1326 | XFS_BMAPI_ENTIRE, NULL, 0, imaps, &nimaps, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1327 | NULL, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | return; |
| 1329 | ASSERT(nimaps == 1); |
| 1330 | ASSERT(imaps[0].br_startblock == HOLESTARTBLOCK); |
| 1331 | } |
| 1332 | #endif /* DEBUG */ |
| 1333 | |
| 1334 | /* |
| 1335 | * Calculate the last possible buffered byte in a file. This must |
| 1336 | * include data that was buffered beyond the EOF by the write code. |
| 1337 | * This also needs to deal with overflowing the xfs_fsize_t type |
| 1338 | * which can happen for sizes near the limit. |
| 1339 | * |
| 1340 | * We also need to take into account any blocks beyond the EOF. It |
| 1341 | * may be the case that they were buffered by a write which failed. |
| 1342 | * In that case the pages will still be in memory, but the inode size |
| 1343 | * will never have been updated. |
| 1344 | */ |
| 1345 | xfs_fsize_t |
| 1346 | xfs_file_last_byte( |
| 1347 | xfs_inode_t *ip) |
| 1348 | { |
| 1349 | xfs_mount_t *mp; |
| 1350 | xfs_fsize_t last_byte; |
| 1351 | xfs_fileoff_t last_block; |
| 1352 | xfs_fileoff_t size_last_block; |
| 1353 | int error; |
| 1354 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1355 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
| 1357 | mp = ip->i_mount; |
| 1358 | /* |
| 1359 | * Only check for blocks beyond the EOF if the extents have |
| 1360 | * been read in. This eliminates the need for the inode lock, |
| 1361 | * and it also saves us from looking when it really isn't |
| 1362 | * necessary. |
| 1363 | */ |
| 1364 | if (ip->i_df.if_flags & XFS_IFEXTENTS) { |
| 1365 | error = xfs_bmap_last_offset(NULL, ip, &last_block, |
| 1366 | XFS_DATA_FORK); |
| 1367 | if (error) { |
| 1368 | last_block = 0; |
| 1369 | } |
| 1370 | } else { |
| 1371 | last_block = 0; |
| 1372 | } |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1373 | size_last_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)ip->i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | last_block = XFS_FILEOFF_MAX(last_block, size_last_block); |
| 1375 | |
| 1376 | last_byte = XFS_FSB_TO_B(mp, last_block); |
| 1377 | if (last_byte < 0) { |
| 1378 | return XFS_MAXIOFFSET(mp); |
| 1379 | } |
| 1380 | last_byte += (1 << mp->m_writeio_log); |
| 1381 | if (last_byte < 0) { |
| 1382 | return XFS_MAXIOFFSET(mp); |
| 1383 | } |
| 1384 | return last_byte; |
| 1385 | } |
| 1386 | |
| 1387 | #if defined(XFS_RW_TRACE) |
| 1388 | STATIC void |
| 1389 | xfs_itrunc_trace( |
| 1390 | int tag, |
| 1391 | xfs_inode_t *ip, |
| 1392 | int flag, |
| 1393 | xfs_fsize_t new_size, |
| 1394 | xfs_off_t toss_start, |
| 1395 | xfs_off_t toss_finish) |
| 1396 | { |
| 1397 | if (ip->i_rwtrace == NULL) { |
| 1398 | return; |
| 1399 | } |
| 1400 | |
| 1401 | ktrace_enter(ip->i_rwtrace, |
| 1402 | (void*)((long)tag), |
| 1403 | (void*)ip, |
| 1404 | (void*)(unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff), |
| 1405 | (void*)(unsigned long)(ip->i_d.di_size & 0xffffffff), |
| 1406 | (void*)((long)flag), |
| 1407 | (void*)(unsigned long)((new_size >> 32) & 0xffffffff), |
| 1408 | (void*)(unsigned long)(new_size & 0xffffffff), |
| 1409 | (void*)(unsigned long)((toss_start >> 32) & 0xffffffff), |
| 1410 | (void*)(unsigned long)(toss_start & 0xffffffff), |
| 1411 | (void*)(unsigned long)((toss_finish >> 32) & 0xffffffff), |
| 1412 | (void*)(unsigned long)(toss_finish & 0xffffffff), |
| 1413 | (void*)(unsigned long)current_cpu(), |
Yingping Lu | f1fdc84 | 2006-03-22 12:44:15 +1100 | [diff] [blame] | 1414 | (void*)(unsigned long)current_pid(), |
| 1415 | (void*)NULL, |
| 1416 | (void*)NULL, |
| 1417 | (void*)NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | } |
| 1419 | #else |
| 1420 | #define xfs_itrunc_trace(tag, ip, flag, new_size, toss_start, toss_finish) |
| 1421 | #endif |
| 1422 | |
| 1423 | /* |
| 1424 | * Start the truncation of the file to new_size. The new size |
| 1425 | * must be smaller than the current size. This routine will |
| 1426 | * clear the buffer and page caches of file data in the removed |
| 1427 | * range, and xfs_itruncate_finish() will remove the underlying |
| 1428 | * disk blocks. |
| 1429 | * |
| 1430 | * The inode must have its I/O lock locked EXCLUSIVELY, and it |
| 1431 | * must NOT have the inode lock held at all. This is because we're |
| 1432 | * calling into the buffer/page cache code and we can't hold the |
| 1433 | * inode lock when we do so. |
| 1434 | * |
David Chinner | 38e2299 | 2006-03-22 12:47:15 +1100 | [diff] [blame] | 1435 | * We need to wait for any direct I/Os in flight to complete before we |
| 1436 | * proceed with the truncate. This is needed to prevent the extents |
| 1437 | * being read or written by the direct I/Os from being removed while the |
| 1438 | * I/O is in flight as there is no other method of synchronising |
| 1439 | * direct I/O with the truncate operation. Also, because we hold |
| 1440 | * the IOLOCK in exclusive mode, we prevent new direct I/Os from being |
| 1441 | * started until the truncate completes and drops the lock. Essentially, |
| 1442 | * the vn_iowait() call forms an I/O barrier that provides strict ordering |
| 1443 | * between direct I/Os and the truncate operation. |
| 1444 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | * The flags parameter can have either the value XFS_ITRUNC_DEFINITE |
| 1446 | * or XFS_ITRUNC_MAYBE. The XFS_ITRUNC_MAYBE value should be used |
| 1447 | * in the case that the caller is locking things out of order and |
| 1448 | * may not be able to call xfs_itruncate_finish() with the inode lock |
| 1449 | * held without dropping the I/O lock. If the caller must drop the |
| 1450 | * I/O lock before calling xfs_itruncate_finish(), then xfs_itruncate_start() |
| 1451 | * must be called again with all the same restrictions as the initial |
| 1452 | * call. |
| 1453 | */ |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1454 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | xfs_itruncate_start( |
| 1456 | xfs_inode_t *ip, |
| 1457 | uint flags, |
| 1458 | xfs_fsize_t new_size) |
| 1459 | { |
| 1460 | xfs_fsize_t last_byte; |
| 1461 | xfs_off_t toss_start; |
| 1462 | xfs_mount_t *mp; |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1463 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1465 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1466 | ASSERT((new_size == 0) || (new_size <= ip->i_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | ASSERT((flags == XFS_ITRUNC_DEFINITE) || |
| 1468 | (flags == XFS_ITRUNC_MAYBE)); |
| 1469 | |
| 1470 | mp = ip->i_mount; |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 1471 | |
Lachlan McIlroy | c734c79 | 2007-12-18 16:17:41 +1100 | [diff] [blame] | 1472 | /* wait for the completion of any pending DIOs */ |
Lachlan McIlroy | d112f29 | 2008-10-30 16:59:06 +1100 | [diff] [blame] | 1473 | if (new_size == 0 || new_size < ip->i_size) |
Lachlan McIlroy | c734c79 | 2007-12-18 16:17:41 +1100 | [diff] [blame] | 1474 | vn_iowait(ip); |
| 1475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | /* |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1477 | * Call toss_pages or flushinval_pages to get rid of pages |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | * overlapping the region being removed. We have to use |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1479 | * the less efficient flushinval_pages in the case that the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | * caller may not be able to finish the truncate without |
| 1481 | * dropping the inode's I/O lock. Make sure |
| 1482 | * to catch any pages brought in by buffers overlapping |
| 1483 | * the EOF by searching out beyond the isize by our |
| 1484 | * block size. We round new_size up to a block boundary |
| 1485 | * so that we don't toss things on the same block as |
| 1486 | * new_size but before it. |
| 1487 | * |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1488 | * Before calling toss_page or flushinval_pages, make sure to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | * call remapf() over the same region if the file is mapped. |
| 1490 | * This frees up mapped file references to the pages in the |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1491 | * given range and for the flushinval_pages case it ensures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | * that we get the latest mapped changes flushed out. |
| 1493 | */ |
| 1494 | toss_start = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
| 1495 | toss_start = XFS_FSB_TO_B(mp, toss_start); |
| 1496 | if (toss_start < 0) { |
| 1497 | /* |
| 1498 | * The place to start tossing is beyond our maximum |
| 1499 | * file size, so there is no way that the data extended |
| 1500 | * out there. |
| 1501 | */ |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1502 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | } |
| 1504 | last_byte = xfs_file_last_byte(ip); |
| 1505 | xfs_itrunc_trace(XFS_ITRUNC_START, ip, flags, new_size, toss_start, |
| 1506 | last_byte); |
| 1507 | if (last_byte > toss_start) { |
| 1508 | if (flags & XFS_ITRUNC_DEFINITE) { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1509 | xfs_tosspages(ip, toss_start, |
| 1510 | -1, FI_REMAPF_LOCKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | } else { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1512 | error = xfs_flushinval_pages(ip, toss_start, |
| 1513 | -1, FI_REMAPF_LOCKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | #ifdef DEBUG |
| 1518 | if (new_size == 0) { |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 1519 | ASSERT(VN_CACHED(VFS_I(ip)) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | } |
| 1521 | #endif |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1522 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | } |
| 1524 | |
| 1525 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1526 | * Shrink the file to the given new_size. The new size must be smaller than |
| 1527 | * the current size. This will free up the underlying blocks in the removed |
| 1528 | * range after a call to xfs_itruncate_start() or xfs_atruncate_start(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1530 | * The transaction passed to this routine must have made a permanent log |
| 1531 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the |
| 1532 | * given transaction and start new ones, so make sure everything involved in |
| 1533 | * the transaction is tidy before calling here. Some transaction will be |
| 1534 | * returned to the caller to be committed. The incoming transaction must |
| 1535 | * already include the inode, and both inode locks must be held exclusively. |
| 1536 | * The inode must also be "held" within the transaction. On return the inode |
| 1537 | * will be "held" within the returned transaction. This routine does NOT |
| 1538 | * require any disk space to be reserved for it within the transaction. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1540 | * The fork parameter must be either xfs_attr_fork or xfs_data_fork, and it |
| 1541 | * indicates the fork which is to be truncated. For the attribute fork we only |
| 1542 | * support truncation to size 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1544 | * We use the sync parameter to indicate whether or not the first transaction |
| 1545 | * we perform might have to be synchronous. For the attr fork, it needs to be |
| 1546 | * so if the unlink of the inode is not yet known to be permanent in the log. |
| 1547 | * This keeps us from freeing and reusing the blocks of the attribute fork |
| 1548 | * before the unlink of the inode becomes permanent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1550 | * For the data fork, we normally have to run synchronously if we're being |
| 1551 | * called out of the inactive path or we're being called out of the create path |
| 1552 | * where we're truncating an existing file. Either way, the truncate needs to |
| 1553 | * be sync so blocks don't reappear in the file with altered data in case of a |
| 1554 | * crash. wsync filesystems can run the first case async because anything that |
| 1555 | * shrinks the inode has to run sync so by the time we're called here from |
| 1556 | * inactive, the inode size is permanently set to 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1558 | * Calls from the truncate path always need to be sync unless we're in a wsync |
| 1559 | * filesystem and the file has already been unlinked. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1561 | * The caller is responsible for correctly setting the sync parameter. It gets |
| 1562 | * too hard for us to guess here which path we're being called out of just |
| 1563 | * based on inode state. |
| 1564 | * |
| 1565 | * If we get an error, we must return with the inode locked and linked into the |
| 1566 | * current transaction. This keeps things simple for the higher level code, |
| 1567 | * because it always knows that the inode is locked and held in the transaction |
| 1568 | * that returns to it whether errors occur or not. We don't mark the inode |
| 1569 | * dirty on error so that transactions can be easily aborted if possible. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | */ |
| 1571 | int |
| 1572 | xfs_itruncate_finish( |
| 1573 | xfs_trans_t **tp, |
| 1574 | xfs_inode_t *ip, |
| 1575 | xfs_fsize_t new_size, |
| 1576 | int fork, |
| 1577 | int sync) |
| 1578 | { |
| 1579 | xfs_fsblock_t first_block; |
| 1580 | xfs_fileoff_t first_unmap_block; |
| 1581 | xfs_fileoff_t last_block; |
| 1582 | xfs_filblks_t unmap_len=0; |
| 1583 | xfs_mount_t *mp; |
| 1584 | xfs_trans_t *ntp; |
| 1585 | int done; |
| 1586 | int committed; |
| 1587 | xfs_bmap_free_t free_list; |
| 1588 | int error; |
| 1589 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1590 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1591 | ASSERT((new_size == 0) || (new_size <= ip->i_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | ASSERT(*tp != NULL); |
| 1593 | ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 1594 | ASSERT(ip->i_transp == *tp); |
| 1595 | ASSERT(ip->i_itemp != NULL); |
| 1596 | ASSERT(ip->i_itemp->ili_flags & XFS_ILI_HOLD); |
| 1597 | |
| 1598 | |
| 1599 | ntp = *tp; |
| 1600 | mp = (ntp)->t_mountp; |
| 1601 | ASSERT(! XFS_NOT_DQATTACHED(mp, ip)); |
| 1602 | |
| 1603 | /* |
| 1604 | * We only support truncating the entire attribute fork. |
| 1605 | */ |
| 1606 | if (fork == XFS_ATTR_FORK) { |
| 1607 | new_size = 0LL; |
| 1608 | } |
| 1609 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
| 1610 | xfs_itrunc_trace(XFS_ITRUNC_FINISH1, ip, 0, new_size, 0, 0); |
| 1611 | /* |
| 1612 | * The first thing we do is set the size to new_size permanently |
| 1613 | * on disk. This way we don't have to worry about anyone ever |
| 1614 | * being able to look at the data being freed even in the face |
| 1615 | * of a crash. What we're getting around here is the case where |
| 1616 | * we free a block, it is allocated to another file, it is written |
| 1617 | * to, and then we crash. If the new data gets written to the |
| 1618 | * file but the log buffers containing the free and reallocation |
| 1619 | * don't, then we'd end up with garbage in the blocks being freed. |
| 1620 | * As long as we make the new_size permanent before actually |
| 1621 | * freeing any blocks it doesn't matter if they get writtten to. |
| 1622 | * |
| 1623 | * The callers must signal into us whether or not the size |
| 1624 | * setting here must be synchronous. There are a few cases |
| 1625 | * where it doesn't have to be synchronous. Those cases |
| 1626 | * occur if the file is unlinked and we know the unlink is |
| 1627 | * permanent or if the blocks being truncated are guaranteed |
| 1628 | * to be beyond the inode eof (regardless of the link count) |
| 1629 | * and the eof value is permanent. Both of these cases occur |
| 1630 | * only on wsync-mounted filesystems. In those cases, we're |
| 1631 | * guaranteed that no user will ever see the data in the blocks |
| 1632 | * that are being truncated so the truncate can run async. |
| 1633 | * In the free beyond eof case, the file may wind up with |
| 1634 | * more blocks allocated to it than it needs if we crash |
| 1635 | * and that won't get fixed until the next time the file |
| 1636 | * is re-opened and closed but that's ok as that shouldn't |
| 1637 | * be too many blocks. |
| 1638 | * |
| 1639 | * However, we can't just make all wsync xactions run async |
| 1640 | * because there's one call out of the create path that needs |
| 1641 | * to run sync where it's truncating an existing file to size |
| 1642 | * 0 whose size is > 0. |
| 1643 | * |
| 1644 | * It's probably possible to come up with a test in this |
| 1645 | * routine that would correctly distinguish all the above |
| 1646 | * cases from the values of the function parameters and the |
| 1647 | * inode state but for sanity's sake, I've decided to let the |
| 1648 | * layers above just tell us. It's simpler to correctly figure |
| 1649 | * out in the layer above exactly under what conditions we |
| 1650 | * can run async and I think it's easier for others read and |
| 1651 | * follow the logic in case something has to be changed. |
| 1652 | * cscope is your friend -- rcc. |
| 1653 | * |
| 1654 | * The attribute fork is much simpler. |
| 1655 | * |
| 1656 | * For the attribute fork we allow the caller to tell us whether |
| 1657 | * the unlink of the inode that led to this call is yet permanent |
| 1658 | * in the on disk log. If it is not and we will be freeing extents |
| 1659 | * in this inode then we make the first transaction synchronous |
| 1660 | * to make sure that the unlink is permanent by the time we free |
| 1661 | * the blocks. |
| 1662 | */ |
| 1663 | if (fork == XFS_DATA_FORK) { |
| 1664 | if (ip->i_d.di_nextents > 0) { |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1665 | /* |
| 1666 | * If we are not changing the file size then do |
| 1667 | * not update the on-disk file size - we may be |
| 1668 | * called from xfs_inactive_free_eofblocks(). If we |
| 1669 | * update the on-disk file size and then the system |
| 1670 | * crashes before the contents of the file are |
| 1671 | * flushed to disk then the files may be full of |
| 1672 | * holes (ie NULL files bug). |
| 1673 | */ |
| 1674 | if (ip->i_size != new_size) { |
| 1675 | ip->i_d.di_size = new_size; |
| 1676 | ip->i_size = new_size; |
| 1677 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | } |
| 1680 | } else if (sync) { |
| 1681 | ASSERT(!(mp->m_flags & XFS_MOUNT_WSYNC)); |
| 1682 | if (ip->i_d.di_anextents > 0) |
| 1683 | xfs_trans_set_sync(ntp); |
| 1684 | } |
| 1685 | ASSERT(fork == XFS_DATA_FORK || |
| 1686 | (fork == XFS_ATTR_FORK && |
| 1687 | ((sync && !(mp->m_flags & XFS_MOUNT_WSYNC)) || |
| 1688 | (sync == 0 && (mp->m_flags & XFS_MOUNT_WSYNC))))); |
| 1689 | |
| 1690 | /* |
| 1691 | * Since it is possible for space to become allocated beyond |
| 1692 | * the end of the file (in a crash where the space is allocated |
| 1693 | * but the inode size is not yet updated), simply remove any |
| 1694 | * blocks which show up between the new EOF and the maximum |
| 1695 | * possible file size. If the first block to be removed is |
| 1696 | * beyond the maximum file size (ie it is the same as last_block), |
| 1697 | * then there is nothing to do. |
| 1698 | */ |
| 1699 | last_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
| 1700 | ASSERT(first_unmap_block <= last_block); |
| 1701 | done = 0; |
| 1702 | if (last_block == first_unmap_block) { |
| 1703 | done = 1; |
| 1704 | } else { |
| 1705 | unmap_len = last_block - first_unmap_block + 1; |
| 1706 | } |
| 1707 | while (!done) { |
| 1708 | /* |
| 1709 | * Free up up to XFS_ITRUNC_MAX_EXTENTS. xfs_bunmapi() |
| 1710 | * will tell us whether it freed the entire range or |
| 1711 | * not. If this is a synchronous mount (wsync), |
| 1712 | * then we can tell bunmapi to keep all the |
| 1713 | * transactions asynchronous since the unlink |
| 1714 | * transaction that made this inode inactive has |
| 1715 | * already hit the disk. There's no danger of |
| 1716 | * the freed blocks being reused, there being a |
| 1717 | * crash, and the reused blocks suddenly reappearing |
| 1718 | * in this file with garbage in them once recovery |
| 1719 | * runs. |
| 1720 | */ |
| 1721 | XFS_BMAP_INIT(&free_list, &first_block); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 1722 | error = xfs_bunmapi(ntp, ip, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1723 | first_unmap_block, unmap_len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | XFS_BMAPI_AFLAG(fork) | |
| 1725 | (sync ? 0 : XFS_BMAPI_ASYNC), |
| 1726 | XFS_ITRUNC_MAX_EXTENTS, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1727 | &first_block, &free_list, |
| 1728 | NULL, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | if (error) { |
| 1730 | /* |
| 1731 | * If the bunmapi call encounters an error, |
| 1732 | * return to the caller where the transaction |
| 1733 | * can be properly aborted. We just need to |
| 1734 | * make sure we're not holding any resources |
| 1735 | * that we were not when we came in. |
| 1736 | */ |
| 1737 | xfs_bmap_cancel(&free_list); |
| 1738 | return error; |
| 1739 | } |
| 1740 | |
| 1741 | /* |
| 1742 | * Duplicate the transaction that has the permanent |
| 1743 | * reservation and commit the old transaction. |
| 1744 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1745 | error = xfs_bmap_finish(tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | ntp = *tp; |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1747 | if (committed) { |
| 1748 | /* link the inode into the next xact in the chain */ |
| 1749 | xfs_trans_ijoin(ntp, ip, |
| 1750 | XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1751 | xfs_trans_ihold(ntp, ip); |
| 1752 | } |
| 1753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | if (error) { |
| 1755 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1756 | * If the bmap finish call encounters an error, return |
| 1757 | * to the caller where the transaction can be properly |
| 1758 | * aborted. We just need to make sure we're not |
| 1759 | * holding any resources that we were not when we came |
| 1760 | * in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1762 | * Aborting from this point might lose some blocks in |
| 1763 | * the file system, but oh well. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | */ |
| 1765 | xfs_bmap_cancel(&free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | return error; |
| 1767 | } |
| 1768 | |
| 1769 | if (committed) { |
| 1770 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1771 | * Mark the inode dirty so it will be logged and |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1772 | * moved forward in the log as part of every commit. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1775 | } |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | ntp = xfs_trans_dup(ntp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1778 | error = xfs_trans_commit(*tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | *tp = ntp; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1780 | |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1781 | /* link the inode into the next transaction in the chain */ |
| 1782 | xfs_trans_ijoin(ntp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1783 | xfs_trans_ihold(ntp, ip); |
| 1784 | |
| 1785 | if (!error) |
| 1786 | error = xfs_trans_reserve(ntp, 0, |
| 1787 | XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 1788 | XFS_TRANS_PERM_LOG_RES, |
| 1789 | XFS_ITRUNCATE_LOG_COUNT); |
| 1790 | if (error) |
| 1791 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | } |
| 1793 | /* |
| 1794 | * Only update the size in the case of the data fork, but |
| 1795 | * always re-log the inode so that our permanent transaction |
| 1796 | * can keep on rolling it forward in the log. |
| 1797 | */ |
| 1798 | if (fork == XFS_DATA_FORK) { |
| 1799 | xfs_isize_check(mp, ip, new_size); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1800 | /* |
| 1801 | * If we are not changing the file size then do |
| 1802 | * not update the on-disk file size - we may be |
| 1803 | * called from xfs_inactive_free_eofblocks(). If we |
| 1804 | * update the on-disk file size and then the system |
| 1805 | * crashes before the contents of the file are |
| 1806 | * flushed to disk then the files may be full of |
| 1807 | * holes (ie NULL files bug). |
| 1808 | */ |
| 1809 | if (ip->i_size != new_size) { |
| 1810 | ip->i_d.di_size = new_size; |
| 1811 | ip->i_size = new_size; |
| 1812 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | } |
| 1814 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1815 | ASSERT((new_size != 0) || |
| 1816 | (fork == XFS_ATTR_FORK) || |
| 1817 | (ip->i_delayed_blks == 0)); |
| 1818 | ASSERT((new_size != 0) || |
| 1819 | (fork == XFS_ATTR_FORK) || |
| 1820 | (ip->i_d.di_nextents == 0)); |
| 1821 | xfs_itrunc_trace(XFS_ITRUNC_FINISH2, ip, 0, new_size, 0, 0); |
| 1822 | return 0; |
| 1823 | } |
| 1824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | /* |
| 1826 | * This is called when the inode's link count goes to 0. |
| 1827 | * We place the on-disk inode on a list in the AGI. It |
| 1828 | * will be pulled from this list when the inode is freed. |
| 1829 | */ |
| 1830 | int |
| 1831 | xfs_iunlink( |
| 1832 | xfs_trans_t *tp, |
| 1833 | xfs_inode_t *ip) |
| 1834 | { |
| 1835 | xfs_mount_t *mp; |
| 1836 | xfs_agi_t *agi; |
| 1837 | xfs_dinode_t *dip; |
| 1838 | xfs_buf_t *agibp; |
| 1839 | xfs_buf_t *ibp; |
| 1840 | xfs_agnumber_t agno; |
| 1841 | xfs_daddr_t agdaddr; |
| 1842 | xfs_agino_t agino; |
| 1843 | short bucket_index; |
| 1844 | int offset; |
| 1845 | int error; |
| 1846 | int agi_ok; |
| 1847 | |
| 1848 | ASSERT(ip->i_d.di_nlink == 0); |
| 1849 | ASSERT(ip->i_d.di_mode != 0); |
| 1850 | ASSERT(ip->i_transp == tp); |
| 1851 | |
| 1852 | mp = tp->t_mountp; |
| 1853 | |
| 1854 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
| 1855 | agdaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); |
| 1856 | |
| 1857 | /* |
| 1858 | * Get the agi buffer first. It ensures lock ordering |
| 1859 | * on the list. |
| 1860 | */ |
| 1861 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, agdaddr, |
| 1862 | XFS_FSS_TO_BB(mp, 1), 0, &agibp); |
Vlad Apostolov | 859d718 | 2007-10-11 17:44:18 +1000 | [diff] [blame] | 1863 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | return error; |
Vlad Apostolov | 859d718 | 2007-10-11 17:44:18 +1000 | [diff] [blame] | 1865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | /* |
| 1867 | * Validate the magic number of the agi block. |
| 1868 | */ |
| 1869 | agi = XFS_BUF_TO_AGI(agibp); |
| 1870 | agi_ok = |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1871 | be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && |
| 1872 | XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IUNLINK, |
| 1874 | XFS_RANDOM_IUNLINK))) { |
| 1875 | XFS_CORRUPTION_ERROR("xfs_iunlink", XFS_ERRLEVEL_LOW, mp, agi); |
| 1876 | xfs_trans_brelse(tp, agibp); |
| 1877 | return XFS_ERROR(EFSCORRUPTED); |
| 1878 | } |
| 1879 | /* |
| 1880 | * Get the index into the agi hash table for the |
| 1881 | * list this inode will go on. |
| 1882 | */ |
| 1883 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); |
| 1884 | ASSERT(agino != 0); |
| 1885 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; |
| 1886 | ASSERT(agi->agi_unlinked[bucket_index]); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1887 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1889 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) != NULLAGINO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | /* |
| 1891 | * There is already another inode in the bucket we need |
| 1892 | * to add ourselves to. Add us at the front of the list. |
| 1893 | * Here we put the head pointer into our next pointer, |
| 1894 | * and then we fall through to point the head at us. |
| 1895 | */ |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 1896 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, 0, 0, XFS_BUF_LOCK); |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 1897 | if (error) |
| 1898 | return error; |
| 1899 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1900 | ASSERT(be32_to_cpu(dip->di_next_unlinked) == NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | /* both on-disk, don't endian flip twice */ |
| 1902 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
| 1903 | offset = ip->i_boffset + |
| 1904 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 1905 | xfs_trans_inode_buf(tp, ibp); |
| 1906 | xfs_trans_log_buf(tp, ibp, offset, |
| 1907 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1908 | xfs_inobp_check(mp, ibp); |
| 1909 | } |
| 1910 | |
| 1911 | /* |
| 1912 | * Point the bucket head pointer at the inode being inserted. |
| 1913 | */ |
| 1914 | ASSERT(agino != 0); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1915 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
| 1917 | (sizeof(xfs_agino_t) * bucket_index); |
| 1918 | xfs_trans_log_buf(tp, agibp, offset, |
| 1919 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1920 | return 0; |
| 1921 | } |
| 1922 | |
| 1923 | /* |
| 1924 | * Pull the on-disk inode from the AGI unlinked list. |
| 1925 | */ |
| 1926 | STATIC int |
| 1927 | xfs_iunlink_remove( |
| 1928 | xfs_trans_t *tp, |
| 1929 | xfs_inode_t *ip) |
| 1930 | { |
| 1931 | xfs_ino_t next_ino; |
| 1932 | xfs_mount_t *mp; |
| 1933 | xfs_agi_t *agi; |
| 1934 | xfs_dinode_t *dip; |
| 1935 | xfs_buf_t *agibp; |
| 1936 | xfs_buf_t *ibp; |
| 1937 | xfs_agnumber_t agno; |
| 1938 | xfs_daddr_t agdaddr; |
| 1939 | xfs_agino_t agino; |
| 1940 | xfs_agino_t next_agino; |
| 1941 | xfs_buf_t *last_ibp; |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 1942 | xfs_dinode_t *last_dip = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | short bucket_index; |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 1944 | int offset, last_offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | int error; |
| 1946 | int agi_ok; |
| 1947 | |
| 1948 | /* |
| 1949 | * First pull the on-disk inode from the AGI unlinked list. |
| 1950 | */ |
| 1951 | mp = tp->t_mountp; |
| 1952 | |
| 1953 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
| 1954 | agdaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); |
| 1955 | |
| 1956 | /* |
| 1957 | * Get the agi buffer first. It ensures lock ordering |
| 1958 | * on the list. |
| 1959 | */ |
| 1960 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, agdaddr, |
| 1961 | XFS_FSS_TO_BB(mp, 1), 0, &agibp); |
| 1962 | if (error) { |
| 1963 | cmn_err(CE_WARN, |
| 1964 | "xfs_iunlink_remove: xfs_trans_read_buf() returned an error %d on %s. Returning error.", |
| 1965 | error, mp->m_fsname); |
| 1966 | return error; |
| 1967 | } |
| 1968 | /* |
| 1969 | * Validate the magic number of the agi block. |
| 1970 | */ |
| 1971 | agi = XFS_BUF_TO_AGI(agibp); |
| 1972 | agi_ok = |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1973 | be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && |
| 1974 | XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IUNLINK_REMOVE, |
| 1976 | XFS_RANDOM_IUNLINK_REMOVE))) { |
| 1977 | XFS_CORRUPTION_ERROR("xfs_iunlink_remove", XFS_ERRLEVEL_LOW, |
| 1978 | mp, agi); |
| 1979 | xfs_trans_brelse(tp, agibp); |
| 1980 | cmn_err(CE_WARN, |
| 1981 | "xfs_iunlink_remove: XFS_TEST_ERROR() returned an error on %s. Returning EFSCORRUPTED.", |
| 1982 | mp->m_fsname); |
| 1983 | return XFS_ERROR(EFSCORRUPTED); |
| 1984 | } |
| 1985 | /* |
| 1986 | * Get the index into the agi hash table for the |
| 1987 | * list this inode will go on. |
| 1988 | */ |
| 1989 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); |
| 1990 | ASSERT(agino != 0); |
| 1991 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1992 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | ASSERT(agi->agi_unlinked[bucket_index]); |
| 1994 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1995 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | /* |
| 1997 | * We're at the head of the list. Get the inode's |
| 1998 | * on-disk buffer to see if there is anyone after us |
| 1999 | * on the list. Only modify our next pointer if it |
| 2000 | * is not already NULLAGINO. This saves us the overhead |
| 2001 | * of dealing with the buffer when there is no need to |
| 2002 | * change it. |
| 2003 | */ |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2004 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, 0, 0, XFS_BUF_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | if (error) { |
| 2006 | cmn_err(CE_WARN, |
| 2007 | "xfs_iunlink_remove: xfs_itobp() returned an error %d on %s. Returning error.", |
| 2008 | error, mp->m_fsname); |
| 2009 | return error; |
| 2010 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2011 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | ASSERT(next_agino != 0); |
| 2013 | if (next_agino != NULLAGINO) { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2014 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | offset = ip->i_boffset + |
| 2016 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 2017 | xfs_trans_inode_buf(tp, ibp); |
| 2018 | xfs_trans_log_buf(tp, ibp, offset, |
| 2019 | (offset + sizeof(xfs_agino_t) - 1)); |
| 2020 | xfs_inobp_check(mp, ibp); |
| 2021 | } else { |
| 2022 | xfs_trans_brelse(tp, ibp); |
| 2023 | } |
| 2024 | /* |
| 2025 | * Point the bucket head pointer at the next inode. |
| 2026 | */ |
| 2027 | ASSERT(next_agino != 0); |
| 2028 | ASSERT(next_agino != agino); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 2029 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
| 2031 | (sizeof(xfs_agino_t) * bucket_index); |
| 2032 | xfs_trans_log_buf(tp, agibp, offset, |
| 2033 | (offset + sizeof(xfs_agino_t) - 1)); |
| 2034 | } else { |
| 2035 | /* |
| 2036 | * We need to search the list for the inode being freed. |
| 2037 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 2038 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | last_ibp = NULL; |
| 2040 | while (next_agino != agino) { |
| 2041 | /* |
| 2042 | * If the last inode wasn't the one pointing to |
| 2043 | * us, then release its buffer since we're not |
| 2044 | * going to do anything with it. |
| 2045 | */ |
| 2046 | if (last_ibp != NULL) { |
| 2047 | xfs_trans_brelse(tp, last_ibp); |
| 2048 | } |
| 2049 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
| 2050 | error = xfs_inotobp(mp, tp, next_ino, &last_dip, |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 2051 | &last_ibp, &last_offset, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | if (error) { |
| 2053 | cmn_err(CE_WARN, |
| 2054 | "xfs_iunlink_remove: xfs_inotobp() returned an error %d on %s. Returning error.", |
| 2055 | error, mp->m_fsname); |
| 2056 | return error; |
| 2057 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2058 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | ASSERT(next_agino != NULLAGINO); |
| 2060 | ASSERT(next_agino != 0); |
| 2061 | } |
| 2062 | /* |
| 2063 | * Now last_ibp points to the buffer previous to us on |
| 2064 | * the unlinked list. Pull us from the list. |
| 2065 | */ |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2066 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, 0, 0, XFS_BUF_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | if (error) { |
| 2068 | cmn_err(CE_WARN, |
| 2069 | "xfs_iunlink_remove: xfs_itobp() returned an error %d on %s. Returning error.", |
| 2070 | error, mp->m_fsname); |
| 2071 | return error; |
| 2072 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2073 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | ASSERT(next_agino != 0); |
| 2075 | ASSERT(next_agino != agino); |
| 2076 | if (next_agino != NULLAGINO) { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2077 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | offset = ip->i_boffset + |
| 2079 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 2080 | xfs_trans_inode_buf(tp, ibp); |
| 2081 | xfs_trans_log_buf(tp, ibp, offset, |
| 2082 | (offset + sizeof(xfs_agino_t) - 1)); |
| 2083 | xfs_inobp_check(mp, ibp); |
| 2084 | } else { |
| 2085 | xfs_trans_brelse(tp, ibp); |
| 2086 | } |
| 2087 | /* |
| 2088 | * Point the previous inode on the list to the next inode. |
| 2089 | */ |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2090 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | ASSERT(next_agino != 0); |
| 2092 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); |
| 2093 | xfs_trans_inode_buf(tp, last_ibp); |
| 2094 | xfs_trans_log_buf(tp, last_ibp, offset, |
| 2095 | (offset + sizeof(xfs_agino_t) - 1)); |
| 2096 | xfs_inobp_check(mp, last_ibp); |
| 2097 | } |
| 2098 | return 0; |
| 2099 | } |
| 2100 | |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 2101 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | xfs_ifree_cluster( |
| 2103 | xfs_inode_t *free_ip, |
| 2104 | xfs_trans_t *tp, |
| 2105 | xfs_ino_t inum) |
| 2106 | { |
| 2107 | xfs_mount_t *mp = free_ip->i_mount; |
| 2108 | int blks_per_cluster; |
| 2109 | int nbufs; |
| 2110 | int ninodes; |
| 2111 | int i, j, found, pre_flushed; |
| 2112 | xfs_daddr_t blkno; |
| 2113 | xfs_buf_t *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | xfs_inode_t *ip, **ip_found; |
| 2115 | xfs_inode_log_item_t *iip; |
| 2116 | xfs_log_item_t *lip; |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2117 | xfs_perag_t *pag = xfs_get_perag(mp, inum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | |
| 2119 | if (mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) { |
| 2120 | blks_per_cluster = 1; |
| 2121 | ninodes = mp->m_sb.sb_inopblock; |
| 2122 | nbufs = XFS_IALLOC_BLOCKS(mp); |
| 2123 | } else { |
| 2124 | blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) / |
| 2125 | mp->m_sb.sb_blocksize; |
| 2126 | ninodes = blks_per_cluster * mp->m_sb.sb_inopblock; |
| 2127 | nbufs = XFS_IALLOC_BLOCKS(mp) / blks_per_cluster; |
| 2128 | } |
| 2129 | |
| 2130 | ip_found = kmem_alloc(ninodes * sizeof(xfs_inode_t *), KM_NOFS); |
| 2131 | |
| 2132 | for (j = 0; j < nbufs; j++, inum += ninodes) { |
| 2133 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), |
| 2134 | XFS_INO_TO_AGBNO(mp, inum)); |
| 2135 | |
| 2136 | |
| 2137 | /* |
| 2138 | * Look for each inode in memory and attempt to lock it, |
| 2139 | * we can be racing with flush and tail pushing here. |
| 2140 | * any inode we get the locks on, add to an array of |
| 2141 | * inode items to process later. |
| 2142 | * |
| 2143 | * The get the buffer lock, we could beat a flush |
| 2144 | * or tail pushing thread to the lock here, in which |
| 2145 | * case they will go looking for the inode buffer |
| 2146 | * and fail, we need some other form of interlock |
| 2147 | * here. |
| 2148 | */ |
| 2149 | found = 0; |
| 2150 | for (i = 0; i < ninodes; i++) { |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2151 | read_lock(&pag->pag_ici_lock); |
| 2152 | ip = radix_tree_lookup(&pag->pag_ici_root, |
| 2153 | XFS_INO_TO_AGINO(mp, (inum + i))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
| 2155 | /* Inode not in memory or we found it already, |
| 2156 | * nothing to do |
| 2157 | */ |
David Chinner | 7a18c38 | 2006-11-11 18:04:54 +1100 | [diff] [blame] | 2158 | if (!ip || xfs_iflags_test(ip, XFS_ISTALE)) { |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2159 | read_unlock(&pag->pag_ici_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | continue; |
| 2161 | } |
| 2162 | |
| 2163 | if (xfs_inode_clean(ip)) { |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2164 | read_unlock(&pag->pag_ici_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | continue; |
| 2166 | } |
| 2167 | |
| 2168 | /* If we can get the locks then add it to the |
| 2169 | * list, otherwise by the time we get the bp lock |
| 2170 | * below it will already be attached to the |
| 2171 | * inode buffer. |
| 2172 | */ |
| 2173 | |
| 2174 | /* This inode will already be locked - by us, lets |
| 2175 | * keep it that way. |
| 2176 | */ |
| 2177 | |
| 2178 | if (ip == free_ip) { |
| 2179 | if (xfs_iflock_nowait(ip)) { |
David Chinner | 7a18c38 | 2006-11-11 18:04:54 +1100 | [diff] [blame] | 2180 | xfs_iflags_set(ip, XFS_ISTALE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | if (xfs_inode_clean(ip)) { |
| 2182 | xfs_ifunlock(ip); |
| 2183 | } else { |
| 2184 | ip_found[found++] = ip; |
| 2185 | } |
| 2186 | } |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2187 | read_unlock(&pag->pag_ici_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | continue; |
| 2189 | } |
| 2190 | |
| 2191 | if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { |
| 2192 | if (xfs_iflock_nowait(ip)) { |
David Chinner | 7a18c38 | 2006-11-11 18:04:54 +1100 | [diff] [blame] | 2193 | xfs_iflags_set(ip, XFS_ISTALE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | |
| 2195 | if (xfs_inode_clean(ip)) { |
| 2196 | xfs_ifunlock(ip); |
| 2197 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2198 | } else { |
| 2199 | ip_found[found++] = ip; |
| 2200 | } |
| 2201 | } else { |
| 2202 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2203 | } |
| 2204 | } |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2205 | read_unlock(&pag->pag_ici_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | } |
| 2207 | |
| 2208 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, |
| 2209 | mp->m_bsize * blks_per_cluster, |
| 2210 | XFS_BUF_LOCK); |
| 2211 | |
| 2212 | pre_flushed = 0; |
| 2213 | lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *); |
| 2214 | while (lip) { |
| 2215 | if (lip->li_type == XFS_LI_INODE) { |
| 2216 | iip = (xfs_inode_log_item_t *)lip; |
| 2217 | ASSERT(iip->ili_logged == 1); |
| 2218 | lip->li_cb = (void(*)(xfs_buf_t*,xfs_log_item_t*)) xfs_istale_done; |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 2219 | xfs_trans_ail_copy_lsn(mp->m_ail, |
| 2220 | &iip->ili_flush_lsn, |
| 2221 | &iip->ili_item.li_lsn); |
David Chinner | e5ffd2b | 2006-11-21 18:55:33 +1100 | [diff] [blame] | 2222 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | pre_flushed++; |
| 2224 | } |
| 2225 | lip = lip->li_bio_list; |
| 2226 | } |
| 2227 | |
| 2228 | for (i = 0; i < found; i++) { |
| 2229 | ip = ip_found[i]; |
| 2230 | iip = ip->i_itemp; |
| 2231 | |
| 2232 | if (!iip) { |
| 2233 | ip->i_update_core = 0; |
| 2234 | xfs_ifunlock(ip); |
| 2235 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2236 | continue; |
| 2237 | } |
| 2238 | |
| 2239 | iip->ili_last_fields = iip->ili_format.ilf_fields; |
| 2240 | iip->ili_format.ilf_fields = 0; |
| 2241 | iip->ili_logged = 1; |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 2242 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
| 2243 | &iip->ili_item.li_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | |
| 2245 | xfs_buf_attach_iodone(bp, |
| 2246 | (void(*)(xfs_buf_t*,xfs_log_item_t*)) |
| 2247 | xfs_istale_done, (xfs_log_item_t *)iip); |
| 2248 | if (ip != free_ip) { |
| 2249 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2250 | } |
| 2251 | } |
| 2252 | |
| 2253 | if (found || pre_flushed) |
| 2254 | xfs_trans_stale_inode_buf(tp, bp); |
| 2255 | xfs_trans_binval(tp, bp); |
| 2256 | } |
| 2257 | |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2258 | kmem_free(ip_found); |
David Chinner | da353b0 | 2007-08-28 14:00:13 +1000 | [diff] [blame] | 2259 | xfs_put_perag(mp, pag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | } |
| 2261 | |
| 2262 | /* |
| 2263 | * This is called to return an inode to the inode free list. |
| 2264 | * The inode should already be truncated to 0 length and have |
| 2265 | * no pages associated with it. This routine also assumes that |
| 2266 | * the inode is already a part of the transaction. |
| 2267 | * |
| 2268 | * The on-disk copy of the inode will have been added to the list |
| 2269 | * of unlinked inodes in the AGI. We need to remove the inode from |
| 2270 | * that list atomically with respect to freeing it here. |
| 2271 | */ |
| 2272 | int |
| 2273 | xfs_ifree( |
| 2274 | xfs_trans_t *tp, |
| 2275 | xfs_inode_t *ip, |
| 2276 | xfs_bmap_free_t *flist) |
| 2277 | { |
| 2278 | int error; |
| 2279 | int delete; |
| 2280 | xfs_ino_t first_ino; |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2281 | xfs_dinode_t *dip; |
| 2282 | xfs_buf_t *ibp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2284 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | ASSERT(ip->i_transp == tp); |
| 2286 | ASSERT(ip->i_d.di_nlink == 0); |
| 2287 | ASSERT(ip->i_d.di_nextents == 0); |
| 2288 | ASSERT(ip->i_d.di_anextents == 0); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 2289 | ASSERT((ip->i_d.di_size == 0 && ip->i_size == 0) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | ((ip->i_d.di_mode & S_IFMT) != S_IFREG)); |
| 2291 | ASSERT(ip->i_d.di_nblocks == 0); |
| 2292 | |
| 2293 | /* |
| 2294 | * Pull the on-disk inode from the AGI unlinked list. |
| 2295 | */ |
| 2296 | error = xfs_iunlink_remove(tp, ip); |
| 2297 | if (error != 0) { |
| 2298 | return error; |
| 2299 | } |
| 2300 | |
| 2301 | error = xfs_difree(tp, ip->i_ino, flist, &delete, &first_ino); |
| 2302 | if (error != 0) { |
| 2303 | return error; |
| 2304 | } |
| 2305 | ip->i_d.di_mode = 0; /* mark incore inode as free */ |
| 2306 | ip->i_d.di_flags = 0; |
| 2307 | ip->i_d.di_dmevmask = 0; |
| 2308 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ |
| 2309 | ip->i_df.if_ext_max = |
| 2310 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 2311 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
| 2312 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| 2313 | /* |
| 2314 | * Bump the generation count so no one will be confused |
| 2315 | * by reincarnations of this inode. |
| 2316 | */ |
| 2317 | ip->i_d.di_gen++; |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 2320 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2321 | error = xfs_itobp(ip->i_mount, tp, ip, &dip, &ibp, 0, 0, XFS_BUF_LOCK); |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2322 | if (error) |
| 2323 | return error; |
| 2324 | |
| 2325 | /* |
| 2326 | * Clear the on-disk di_mode. This is to prevent xfs_bulkstat |
| 2327 | * from picking up this inode when it is reclaimed (its incore state |
| 2328 | * initialzed but not flushed to disk yet). The in-core di_mode is |
| 2329 | * already cleared and a corresponding transaction logged. |
| 2330 | * The hack here just synchronizes the in-core to on-disk |
| 2331 | * di_mode value in advance before the actual inode sync to disk. |
| 2332 | * This is OK because the inode is already unlinked and would never |
| 2333 | * change its di_mode again for this inode generation. |
| 2334 | * This is a temporary hack that would require a proper fix |
| 2335 | * in the future. |
| 2336 | */ |
| 2337 | dip->di_core.di_mode = 0; |
| 2338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | if (delete) { |
| 2340 | xfs_ifree_cluster(ip, tp, first_ino); |
| 2341 | } |
| 2342 | |
| 2343 | return 0; |
| 2344 | } |
| 2345 | |
| 2346 | /* |
| 2347 | * Reallocate the space for if_broot based on the number of records |
| 2348 | * being added or deleted as indicated in rec_diff. Move the records |
| 2349 | * and pointers in if_broot to fit the new size. When shrinking this |
| 2350 | * will eliminate holes between the records and pointers created by |
| 2351 | * the caller. When growing this will create holes to be filled in |
| 2352 | * by the caller. |
| 2353 | * |
| 2354 | * The caller must not request to add more records than would fit in |
| 2355 | * the on-disk inode root. If the if_broot is currently NULL, then |
| 2356 | * if we adding records one will be allocated. The caller must also |
| 2357 | * not request that the number of records go below zero, although |
| 2358 | * it can go to zero. |
| 2359 | * |
| 2360 | * ip -- the inode whose if_broot area is changing |
| 2361 | * ext_diff -- the change in the number of records, positive or negative, |
| 2362 | * requested for the if_broot array. |
| 2363 | */ |
| 2364 | void |
| 2365 | xfs_iroot_realloc( |
| 2366 | xfs_inode_t *ip, |
| 2367 | int rec_diff, |
| 2368 | int whichfork) |
| 2369 | { |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2370 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | int cur_max; |
| 2372 | xfs_ifork_t *ifp; |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2373 | struct xfs_btree_block *new_broot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | int new_max; |
| 2375 | size_t new_size; |
| 2376 | char *np; |
| 2377 | char *op; |
| 2378 | |
| 2379 | /* |
| 2380 | * Handle the degenerate case quietly. |
| 2381 | */ |
| 2382 | if (rec_diff == 0) { |
| 2383 | return; |
| 2384 | } |
| 2385 | |
| 2386 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2387 | if (rec_diff > 0) { |
| 2388 | /* |
| 2389 | * If there wasn't any memory allocated before, just |
| 2390 | * allocate it now and get out. |
| 2391 | */ |
| 2392 | if (ifp->if_broot_bytes == 0) { |
| 2393 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(rec_diff); |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2394 | ifp->if_broot = kmem_alloc(new_size, KM_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | ifp->if_broot_bytes = (int)new_size; |
| 2396 | return; |
| 2397 | } |
| 2398 | |
| 2399 | /* |
| 2400 | * If there is already an existing if_broot, then we need |
| 2401 | * to realloc() it and shift the pointers to their new |
| 2402 | * location. The records don't change location because |
| 2403 | * they are kept butted up against the btree block header. |
| 2404 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2405 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | new_max = cur_max + rec_diff; |
| 2407 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max); |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2408 | ifp->if_broot = kmem_realloc(ifp->if_broot, new_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | (size_t)XFS_BMAP_BROOT_SPACE_CALC(cur_max), /* old size */ |
| 2410 | KM_SLEEP); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2411 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
| 2412 | ifp->if_broot_bytes); |
| 2413 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
| 2414 | (int)new_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | ifp->if_broot_bytes = (int)new_size; |
| 2416 | ASSERT(ifp->if_broot_bytes <= |
| 2417 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ); |
| 2418 | memmove(np, op, cur_max * (uint)sizeof(xfs_dfsbno_t)); |
| 2419 | return; |
| 2420 | } |
| 2421 | |
| 2422 | /* |
| 2423 | * rec_diff is less than 0. In this case, we are shrinking the |
| 2424 | * if_broot buffer. It must already exist. If we go to zero |
| 2425 | * records, just get rid of the root and clear the status bit. |
| 2426 | */ |
| 2427 | ASSERT((ifp->if_broot != NULL) && (ifp->if_broot_bytes > 0)); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2428 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | new_max = cur_max + rec_diff; |
| 2430 | ASSERT(new_max >= 0); |
| 2431 | if (new_max > 0) |
| 2432 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max); |
| 2433 | else |
| 2434 | new_size = 0; |
| 2435 | if (new_size > 0) { |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2436 | new_broot = kmem_alloc(new_size, KM_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | /* |
| 2438 | * First copy over the btree block header. |
| 2439 | */ |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2440 | memcpy(new_broot, ifp->if_broot, XFS_BTREE_LBLOCK_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | } else { |
| 2442 | new_broot = NULL; |
| 2443 | ifp->if_flags &= ~XFS_IFBROOT; |
| 2444 | } |
| 2445 | |
| 2446 | /* |
| 2447 | * Only copy the records and pointers if there are any. |
| 2448 | */ |
| 2449 | if (new_max > 0) { |
| 2450 | /* |
| 2451 | * First copy the records. |
| 2452 | */ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 2453 | op = (char *)XFS_BMBT_REC_ADDR(mp, ifp->if_broot, 1); |
| 2454 | np = (char *)XFS_BMBT_REC_ADDR(mp, new_broot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | memcpy(np, op, new_max * (uint)sizeof(xfs_bmbt_rec_t)); |
| 2456 | |
| 2457 | /* |
| 2458 | * Then copy the pointers. |
| 2459 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2460 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | ifp->if_broot_bytes); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2462 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, new_broot, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | (int)new_size); |
| 2464 | memcpy(np, op, new_max * (uint)sizeof(xfs_dfsbno_t)); |
| 2465 | } |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2466 | kmem_free(ifp->if_broot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | ifp->if_broot = new_broot; |
| 2468 | ifp->if_broot_bytes = (int)new_size; |
| 2469 | ASSERT(ifp->if_broot_bytes <= |
| 2470 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ); |
| 2471 | return; |
| 2472 | } |
| 2473 | |
| 2474 | |
| 2475 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | * This is called when the amount of space needed for if_data |
| 2477 | * is increased or decreased. The change in size is indicated by |
| 2478 | * the number of bytes that need to be added or deleted in the |
| 2479 | * byte_diff parameter. |
| 2480 | * |
| 2481 | * If the amount of space needed has decreased below the size of the |
| 2482 | * inline buffer, then switch to using the inline buffer. Otherwise, |
| 2483 | * use kmem_realloc() or kmem_alloc() to adjust the size of the buffer |
| 2484 | * to what is needed. |
| 2485 | * |
| 2486 | * ip -- the inode whose if_data area is changing |
| 2487 | * byte_diff -- the change in the number of bytes, positive or negative, |
| 2488 | * requested for the if_data array. |
| 2489 | */ |
| 2490 | void |
| 2491 | xfs_idata_realloc( |
| 2492 | xfs_inode_t *ip, |
| 2493 | int byte_diff, |
| 2494 | int whichfork) |
| 2495 | { |
| 2496 | xfs_ifork_t *ifp; |
| 2497 | int new_size; |
| 2498 | int real_size; |
| 2499 | |
| 2500 | if (byte_diff == 0) { |
| 2501 | return; |
| 2502 | } |
| 2503 | |
| 2504 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2505 | new_size = (int)ifp->if_bytes + byte_diff; |
| 2506 | ASSERT(new_size >= 0); |
| 2507 | |
| 2508 | if (new_size == 0) { |
| 2509 | if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2510 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | } |
| 2512 | ifp->if_u1.if_data = NULL; |
| 2513 | real_size = 0; |
| 2514 | } else if (new_size <= sizeof(ifp->if_u2.if_inline_data)) { |
| 2515 | /* |
| 2516 | * If the valid extents/data can fit in if_inline_ext/data, |
| 2517 | * copy them from the malloc'd vector and free it. |
| 2518 | */ |
| 2519 | if (ifp->if_u1.if_data == NULL) { |
| 2520 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 2521 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
| 2522 | ASSERT(ifp->if_real_bytes != 0); |
| 2523 | memcpy(ifp->if_u2.if_inline_data, ifp->if_u1.if_data, |
| 2524 | new_size); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2525 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 2527 | } |
| 2528 | real_size = 0; |
| 2529 | } else { |
| 2530 | /* |
| 2531 | * Stuck with malloc/realloc. |
| 2532 | * For inline data, the underlying buffer must be |
| 2533 | * a multiple of 4 bytes in size so that it can be |
| 2534 | * logged and stay on word boundaries. We enforce |
| 2535 | * that here. |
| 2536 | */ |
| 2537 | real_size = roundup(new_size, 4); |
| 2538 | if (ifp->if_u1.if_data == NULL) { |
| 2539 | ASSERT(ifp->if_real_bytes == 0); |
| 2540 | ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP); |
| 2541 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
| 2542 | /* |
| 2543 | * Only do the realloc if the underlying size |
| 2544 | * is really changing. |
| 2545 | */ |
| 2546 | if (ifp->if_real_bytes != real_size) { |
| 2547 | ifp->if_u1.if_data = |
| 2548 | kmem_realloc(ifp->if_u1.if_data, |
| 2549 | real_size, |
| 2550 | ifp->if_real_bytes, |
| 2551 | KM_SLEEP); |
| 2552 | } |
| 2553 | } else { |
| 2554 | ASSERT(ifp->if_real_bytes == 0); |
| 2555 | ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP); |
| 2556 | memcpy(ifp->if_u1.if_data, ifp->if_u2.if_inline_data, |
| 2557 | ifp->if_bytes); |
| 2558 | } |
| 2559 | } |
| 2560 | ifp->if_real_bytes = real_size; |
| 2561 | ifp->if_bytes = new_size; |
| 2562 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); |
| 2563 | } |
| 2564 | |
| 2565 | |
| 2566 | |
| 2567 | |
| 2568 | /* |
| 2569 | * Map inode to disk block and offset. |
| 2570 | * |
| 2571 | * mp -- the mount point structure for the current file system |
| 2572 | * tp -- the current transaction |
| 2573 | * ino -- the inode number of the inode to be located |
| 2574 | * imap -- this structure is filled in with the information necessary |
| 2575 | * to retrieve the given inode from disk |
| 2576 | * flags -- flags to pass to xfs_dilocate indicating whether or not |
| 2577 | * lookups in the inode btree were OK or not |
| 2578 | */ |
| 2579 | int |
| 2580 | xfs_imap( |
| 2581 | xfs_mount_t *mp, |
| 2582 | xfs_trans_t *tp, |
| 2583 | xfs_ino_t ino, |
| 2584 | xfs_imap_t *imap, |
| 2585 | uint flags) |
| 2586 | { |
| 2587 | xfs_fsblock_t fsbno; |
| 2588 | int len; |
| 2589 | int off; |
| 2590 | int error; |
| 2591 | |
| 2592 | fsbno = imap->im_blkno ? |
| 2593 | XFS_DADDR_TO_FSB(mp, imap->im_blkno) : NULLFSBLOCK; |
| 2594 | error = xfs_dilocate(mp, tp, ino, &fsbno, &len, &off, flags); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 2595 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | return error; |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 2597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | imap->im_blkno = XFS_FSB_TO_DADDR(mp, fsbno); |
| 2599 | imap->im_len = XFS_FSB_TO_BB(mp, len); |
| 2600 | imap->im_agblkno = XFS_FSB_TO_AGBNO(mp, fsbno); |
| 2601 | imap->im_ioffset = (ushort)off; |
| 2602 | imap->im_boffset = (ushort)(off << mp->m_sb.sb_inodelog); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 2603 | |
| 2604 | /* |
| 2605 | * If the inode number maps to a block outside the bounds |
| 2606 | * of the file system then return NULL rather than calling |
| 2607 | * read_buf and panicing when we get an error from the |
| 2608 | * driver. |
| 2609 | */ |
| 2610 | if ((imap->im_blkno + imap->im_len) > |
| 2611 | XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) { |
| 2612 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
| 2613 | "(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > " |
| 2614 | " XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)", |
| 2615 | (unsigned long long) imap->im_blkno, |
| 2616 | (unsigned long long) imap->im_len, |
| 2617 | XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)); |
| 2618 | return EINVAL; |
| 2619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | return 0; |
| 2621 | } |
| 2622 | |
| 2623 | void |
| 2624 | xfs_idestroy_fork( |
| 2625 | xfs_inode_t *ip, |
| 2626 | int whichfork) |
| 2627 | { |
| 2628 | xfs_ifork_t *ifp; |
| 2629 | |
| 2630 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2631 | if (ifp->if_broot != NULL) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2632 | kmem_free(ifp->if_broot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | ifp->if_broot = NULL; |
| 2634 | } |
| 2635 | |
| 2636 | /* |
| 2637 | * If the format is local, then we can't have an extents |
| 2638 | * array so just look for an inline data array. If we're |
| 2639 | * not local then we may or may not have an extents list, |
| 2640 | * so check and free it up if we do. |
| 2641 | */ |
| 2642 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| 2643 | if ((ifp->if_u1.if_data != ifp->if_u2.if_inline_data) && |
| 2644 | (ifp->if_u1.if_data != NULL)) { |
| 2645 | ASSERT(ifp->if_real_bytes != 0); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2646 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2647 | ifp->if_u1.if_data = NULL; |
| 2648 | ifp->if_real_bytes = 0; |
| 2649 | } |
| 2650 | } else if ((ifp->if_flags & XFS_IFEXTENTS) && |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 2651 | ((ifp->if_flags & XFS_IFEXTIREC) || |
| 2652 | ((ifp->if_u1.if_extents != NULL) && |
| 2653 | (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | ASSERT(ifp->if_real_bytes != 0); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 2655 | xfs_iext_destroy(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | } |
| 2657 | ASSERT(ifp->if_u1.if_extents == NULL || |
| 2658 | ifp->if_u1.if_extents == ifp->if_u2.if_inline_ext); |
| 2659 | ASSERT(ifp->if_real_bytes == 0); |
| 2660 | if (whichfork == XFS_ATTR_FORK) { |
| 2661 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); |
| 2662 | ip->i_afp = NULL; |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | /* |
| 2667 | * This is called free all the memory associated with an inode. |
| 2668 | * It must free the inode itself and any buffers allocated for |
| 2669 | * if_extents/if_data and if_broot. It must also free the lock |
| 2670 | * associated with the inode. |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 2671 | * |
| 2672 | * Note: because we don't initialise everything on reallocation out |
| 2673 | * of the zone, we must ensure we nullify everything correctly before |
| 2674 | * freeing the structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2675 | */ |
| 2676 | void |
| 2677 | xfs_idestroy( |
| 2678 | xfs_inode_t *ip) |
| 2679 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2680 | switch (ip->i_d.di_mode & S_IFMT) { |
| 2681 | case S_IFREG: |
| 2682 | case S_IFDIR: |
| 2683 | case S_IFLNK: |
| 2684 | xfs_idestroy_fork(ip, XFS_DATA_FORK); |
| 2685 | break; |
| 2686 | } |
| 2687 | if (ip->i_afp) |
| 2688 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
Christoph Hellwig | 1543d79 | 2007-08-29 11:46:47 +1000 | [diff] [blame] | 2689 | |
Lachlan McIlroy | cf441ee | 2008-02-07 16:42:19 +1100 | [diff] [blame] | 2690 | #ifdef XFS_INODE_TRACE |
Christoph Hellwig | 1543d79 | 2007-08-29 11:46:47 +1000 | [diff] [blame] | 2691 | ktrace_free(ip->i_trace); |
| 2692 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | #ifdef XFS_BMAP_TRACE |
| 2694 | ktrace_free(ip->i_xtrace); |
| 2695 | #endif |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 2696 | #ifdef XFS_BTREE_TRACE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | ktrace_free(ip->i_btrace); |
| 2698 | #endif |
| 2699 | #ifdef XFS_RW_TRACE |
| 2700 | ktrace_free(ip->i_rwtrace); |
| 2701 | #endif |
| 2702 | #ifdef XFS_ILOCK_TRACE |
| 2703 | ktrace_free(ip->i_lock_trace); |
| 2704 | #endif |
| 2705 | #ifdef XFS_DIR2_TRACE |
| 2706 | ktrace_free(ip->i_dir_trace); |
| 2707 | #endif |
| 2708 | if (ip->i_itemp) { |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2709 | /* |
| 2710 | * Only if we are shutting down the fs will we see an |
| 2711 | * inode still in the AIL. If it is there, we should remove |
| 2712 | * it to prevent a use-after-free from occurring. |
| 2713 | */ |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2714 | xfs_log_item_t *lip = &ip->i_itemp->ili_item; |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2715 | struct xfs_ail *ailp = lip->li_ailp; |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2716 | |
| 2717 | ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) || |
| 2718 | XFS_FORCED_SHUTDOWN(ip->i_mount)); |
| 2719 | if (lip->li_flags & XFS_LI_IN_AIL) { |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2720 | spin_lock(&ailp->xa_lock); |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2721 | if (lip->li_flags & XFS_LI_IN_AIL) |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2722 | xfs_trans_ail_delete(ailp, lip); |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2723 | else |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2724 | spin_unlock(&ailp->xa_lock); |
David Chinner | f74eaf5 | 2007-02-10 18:36:04 +1100 | [diff] [blame] | 2725 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | xfs_inode_item_destroy(ip); |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 2727 | ip->i_itemp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | } |
David Chinner | 07c8f67 | 2008-10-30 16:11:59 +1100 | [diff] [blame] | 2729 | /* asserts to verify all state is correct here */ |
| 2730 | ASSERT(atomic_read(&ip->i_iocount) == 0); |
| 2731 | ASSERT(atomic_read(&ip->i_pincount) == 0); |
| 2732 | ASSERT(!spin_is_locked(&ip->i_flags_lock)); |
David Chinner | 1165451 | 2008-10-30 17:37:49 +1100 | [diff] [blame] | 2733 | ASSERT(completion_done(&ip->i_flush)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | kmem_zone_free(xfs_inode_zone, ip); |
| 2735 | } |
| 2736 | |
| 2737 | |
| 2738 | /* |
| 2739 | * Increment the pin count of the given buffer. |
| 2740 | * This value is protected by ipinlock spinlock in the mount structure. |
| 2741 | */ |
| 2742 | void |
| 2743 | xfs_ipin( |
| 2744 | xfs_inode_t *ip) |
| 2745 | { |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2746 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | |
| 2748 | atomic_inc(&ip->i_pincount); |
| 2749 | } |
| 2750 | |
| 2751 | /* |
| 2752 | * Decrement the pin count of the given inode, and wake up |
| 2753 | * anyone in xfs_iwait_unpin() if the count goes to 0. The |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 2754 | * inode must have been previously pinned with a call to xfs_ipin(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | */ |
| 2756 | void |
| 2757 | xfs_iunpin( |
| 2758 | xfs_inode_t *ip) |
| 2759 | { |
| 2760 | ASSERT(atomic_read(&ip->i_pincount) > 0); |
| 2761 | |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 2762 | if (atomic_dec_and_test(&ip->i_pincount)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | wake_up(&ip->i_ipin_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | } |
| 2765 | |
| 2766 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2767 | * This is called to unpin an inode. It can be directed to wait or to return |
| 2768 | * immediately without waiting for the inode to be unpinned. The caller must |
| 2769 | * have the inode locked in at least shared mode so that the buffer cannot be |
| 2770 | * subsequently pinned once someone is waiting for it to be unpinned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 2772 | STATIC void |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2773 | __xfs_iunpin_wait( |
| 2774 | xfs_inode_t *ip, |
| 2775 | int wait) |
| 2776 | { |
| 2777 | xfs_inode_log_item_t *iip = ip->i_itemp; |
| 2778 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2779 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2780 | if (atomic_read(&ip->i_pincount) == 0) |
| 2781 | return; |
| 2782 | |
| 2783 | /* Give the log a push to start the unpinning I/O */ |
| 2784 | xfs_log_force(ip->i_mount, (iip && iip->ili_last_lsn) ? |
| 2785 | iip->ili_last_lsn : 0, XFS_LOG_FORCE); |
| 2786 | if (wait) |
| 2787 | wait_event(ip->i_ipin_wait, (atomic_read(&ip->i_pincount) == 0)); |
| 2788 | } |
| 2789 | |
| 2790 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | xfs_iunpin_wait( |
| 2792 | xfs_inode_t *ip) |
| 2793 | { |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2794 | __xfs_iunpin_wait(ip, 1); |
| 2795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2797 | static inline void |
| 2798 | xfs_iunpin_nowait( |
| 2799 | xfs_inode_t *ip) |
| 2800 | { |
| 2801 | __xfs_iunpin_wait(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | } |
| 2803 | |
| 2804 | |
| 2805 | /* |
| 2806 | * xfs_iextents_copy() |
| 2807 | * |
| 2808 | * This is called to copy the REAL extents (as opposed to the delayed |
| 2809 | * allocation extents) from the inode into the given buffer. It |
| 2810 | * returns the number of bytes copied into the buffer. |
| 2811 | * |
| 2812 | * If there are no delayed allocation extents, then we can just |
| 2813 | * memcpy() the extents into the buffer. Otherwise, we need to |
| 2814 | * examine each extent in turn and skip those which are delayed. |
| 2815 | */ |
| 2816 | int |
| 2817 | xfs_iextents_copy( |
| 2818 | xfs_inode_t *ip, |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2819 | xfs_bmbt_rec_t *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | int whichfork) |
| 2821 | { |
| 2822 | int copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2823 | int i; |
| 2824 | xfs_ifork_t *ifp; |
| 2825 | int nrecs; |
| 2826 | xfs_fsblock_t start_block; |
| 2827 | |
| 2828 | ifp = XFS_IFORK_PTR(ip, whichfork); |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2829 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | ASSERT(ifp->if_bytes > 0); |
| 2831 | |
| 2832 | nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 2833 | XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | ASSERT(nrecs > 0); |
| 2835 | |
| 2836 | /* |
| 2837 | * There are some delayed allocation extents in the |
| 2838 | * inode, so copy the extents one at a time and skip |
| 2839 | * the delayed ones. There must be at least one |
| 2840 | * non-delayed extent. |
| 2841 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | copied = 0; |
| 2843 | for (i = 0; i < nrecs; i++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2844 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | start_block = xfs_bmbt_get_startblock(ep); |
| 2846 | if (ISNULLSTARTBLOCK(start_block)) { |
| 2847 | /* |
| 2848 | * It's a delayed allocation extent, so skip it. |
| 2849 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | continue; |
| 2851 | } |
| 2852 | |
| 2853 | /* Translate to on disk format */ |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 2854 | put_unaligned(cpu_to_be64(ep->l0), &dp->l0); |
| 2855 | put_unaligned(cpu_to_be64(ep->l1), &dp->l1); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2856 | dp++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | copied++; |
| 2858 | } |
| 2859 | ASSERT(copied != 0); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2860 | xfs_validate_extents(ifp, copied, XFS_EXTFMT_INODE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | |
| 2862 | return (copied * (uint)sizeof(xfs_bmbt_rec_t)); |
| 2863 | } |
| 2864 | |
| 2865 | /* |
| 2866 | * Each of the following cases stores data into the same region |
| 2867 | * of the on-disk inode, so only one of them can be valid at |
| 2868 | * any given time. While it is possible to have conflicting formats |
| 2869 | * and log flags, e.g. having XFS_ILOG_?DATA set when the fork is |
| 2870 | * in EXTENTS format, this can only happen when the fork has |
| 2871 | * changed formats after being modified but before being flushed. |
| 2872 | * In these cases, the format always takes precedence, because the |
| 2873 | * format indicates the current state of the fork. |
| 2874 | */ |
| 2875 | /*ARGSUSED*/ |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2876 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | xfs_iflush_fork( |
| 2878 | xfs_inode_t *ip, |
| 2879 | xfs_dinode_t *dip, |
| 2880 | xfs_inode_log_item_t *iip, |
| 2881 | int whichfork, |
| 2882 | xfs_buf_t *bp) |
| 2883 | { |
| 2884 | char *cp; |
| 2885 | xfs_ifork_t *ifp; |
| 2886 | xfs_mount_t *mp; |
| 2887 | #ifdef XFS_TRANS_DEBUG |
| 2888 | int first; |
| 2889 | #endif |
| 2890 | static const short brootflag[2] = |
| 2891 | { XFS_ILOG_DBROOT, XFS_ILOG_ABROOT }; |
| 2892 | static const short dataflag[2] = |
| 2893 | { XFS_ILOG_DDATA, XFS_ILOG_ADATA }; |
| 2894 | static const short extflag[2] = |
| 2895 | { XFS_ILOG_DEXT, XFS_ILOG_AEXT }; |
| 2896 | |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2897 | if (!iip) |
| 2898 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2899 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2900 | /* |
| 2901 | * This can happen if we gave up in iformat in an error path, |
| 2902 | * for the attribute fork. |
| 2903 | */ |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2904 | if (!ifp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | ASSERT(whichfork == XFS_ATTR_FORK); |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2906 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | } |
| 2908 | cp = XFS_DFORK_PTR(dip, whichfork); |
| 2909 | mp = ip->i_mount; |
| 2910 | switch (XFS_IFORK_FORMAT(ip, whichfork)) { |
| 2911 | case XFS_DINODE_FMT_LOCAL: |
| 2912 | if ((iip->ili_format.ilf_fields & dataflag[whichfork]) && |
| 2913 | (ifp->if_bytes > 0)) { |
| 2914 | ASSERT(ifp->if_u1.if_data != NULL); |
| 2915 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); |
| 2916 | memcpy(cp, ifp->if_u1.if_data, ifp->if_bytes); |
| 2917 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2918 | break; |
| 2919 | |
| 2920 | case XFS_DINODE_FMT_EXTENTS: |
| 2921 | ASSERT((ifp->if_flags & XFS_IFEXTENTS) || |
| 2922 | !(iip->ili_format.ilf_fields & extflag[whichfork])); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 2923 | ASSERT((xfs_iext_get_ext(ifp, 0) != NULL) || |
| 2924 | (ifp->if_bytes == 0)); |
| 2925 | ASSERT((xfs_iext_get_ext(ifp, 0) == NULL) || |
| 2926 | (ifp->if_bytes > 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | if ((iip->ili_format.ilf_fields & extflag[whichfork]) && |
| 2928 | (ifp->if_bytes > 0)) { |
| 2929 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0); |
| 2930 | (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp, |
| 2931 | whichfork); |
| 2932 | } |
| 2933 | break; |
| 2934 | |
| 2935 | case XFS_DINODE_FMT_BTREE: |
| 2936 | if ((iip->ili_format.ilf_fields & brootflag[whichfork]) && |
| 2937 | (ifp->if_broot_bytes > 0)) { |
| 2938 | ASSERT(ifp->if_broot != NULL); |
| 2939 | ASSERT(ifp->if_broot_bytes <= |
| 2940 | (XFS_IFORK_SIZE(ip, whichfork) + |
| 2941 | XFS_BROOT_SIZE_ADJ)); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2942 | xfs_bmbt_to_bmdr(mp, ifp->if_broot, ifp->if_broot_bytes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | (xfs_bmdr_block_t *)cp, |
| 2944 | XFS_DFORK_SIZE(dip, mp, whichfork)); |
| 2945 | } |
| 2946 | break; |
| 2947 | |
| 2948 | case XFS_DINODE_FMT_DEV: |
| 2949 | if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) { |
| 2950 | ASSERT(whichfork == XFS_DATA_FORK); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2951 | dip->di_u.di_dev = cpu_to_be32(ip->i_df.if_u2.if_rdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | } |
| 2953 | break; |
| 2954 | |
| 2955 | case XFS_DINODE_FMT_UUID: |
| 2956 | if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) { |
| 2957 | ASSERT(whichfork == XFS_DATA_FORK); |
| 2958 | memcpy(&dip->di_u.di_muuid, &ip->i_df.if_u2.if_uuid, |
| 2959 | sizeof(uuid_t)); |
| 2960 | } |
| 2961 | break; |
| 2962 | |
| 2963 | default: |
| 2964 | ASSERT(0); |
| 2965 | break; |
| 2966 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | } |
| 2968 | |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2969 | STATIC int |
| 2970 | xfs_iflush_cluster( |
| 2971 | xfs_inode_t *ip, |
| 2972 | xfs_buf_t *bp) |
| 2973 | { |
| 2974 | xfs_mount_t *mp = ip->i_mount; |
| 2975 | xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino); |
| 2976 | unsigned long first_index, mask; |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 2977 | unsigned long inodes_per_cluster; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2978 | int ilist_size; |
| 2979 | xfs_inode_t **ilist; |
| 2980 | xfs_inode_t *iq; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2981 | int nr_found; |
| 2982 | int clcount = 0; |
| 2983 | int bufwasdelwri; |
| 2984 | int i; |
| 2985 | |
| 2986 | ASSERT(pag->pagi_inodeok); |
| 2987 | ASSERT(pag->pag_ici_init); |
| 2988 | |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 2989 | inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog; |
| 2990 | ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); |
David Chinner | 49383b0 | 2008-05-19 16:29:34 +1000 | [diff] [blame] | 2991 | ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2992 | if (!ilist) |
| 2993 | return 0; |
| 2994 | |
| 2995 | mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); |
| 2996 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; |
| 2997 | read_lock(&pag->pag_ici_lock); |
| 2998 | /* really need a gang lookup range call here */ |
| 2999 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 3000 | first_index, inodes_per_cluster); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3001 | if (nr_found == 0) |
| 3002 | goto out_free; |
| 3003 | |
| 3004 | for (i = 0; i < nr_found; i++) { |
| 3005 | iq = ilist[i]; |
| 3006 | if (iq == ip) |
| 3007 | continue; |
| 3008 | /* if the inode lies outside this cluster, we're done. */ |
| 3009 | if ((XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) |
| 3010 | break; |
| 3011 | /* |
| 3012 | * Do an un-protected check to see if the inode is dirty and |
| 3013 | * is a candidate for flushing. These checks will be repeated |
| 3014 | * later after the appropriate locks are acquired. |
| 3015 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 3016 | if (xfs_inode_clean(iq) && xfs_ipincount(iq) == 0) |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3017 | continue; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3018 | |
| 3019 | /* |
| 3020 | * Try to get locks. If any are unavailable or it is pinned, |
| 3021 | * then this inode cannot be flushed and is skipped. |
| 3022 | */ |
| 3023 | |
| 3024 | if (!xfs_ilock_nowait(iq, XFS_ILOCK_SHARED)) |
| 3025 | continue; |
| 3026 | if (!xfs_iflock_nowait(iq)) { |
| 3027 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 3028 | continue; |
| 3029 | } |
| 3030 | if (xfs_ipincount(iq)) { |
| 3031 | xfs_ifunlock(iq); |
| 3032 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 3033 | continue; |
| 3034 | } |
| 3035 | |
| 3036 | /* |
| 3037 | * arriving here means that this inode can be flushed. First |
| 3038 | * re-check that it's dirty before flushing. |
| 3039 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 3040 | if (!xfs_inode_clean(iq)) { |
| 3041 | int error; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3042 | error = xfs_iflush_int(iq, bp); |
| 3043 | if (error) { |
| 3044 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 3045 | goto cluster_corrupt_out; |
| 3046 | } |
| 3047 | clcount++; |
| 3048 | } else { |
| 3049 | xfs_ifunlock(iq); |
| 3050 | } |
| 3051 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 3052 | } |
| 3053 | |
| 3054 | if (clcount) { |
| 3055 | XFS_STATS_INC(xs_icluster_flushcnt); |
| 3056 | XFS_STATS_ADD(xs_icluster_flushinode, clcount); |
| 3057 | } |
| 3058 | |
| 3059 | out_free: |
| 3060 | read_unlock(&pag->pag_ici_lock); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3061 | kmem_free(ilist); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3062 | return 0; |
| 3063 | |
| 3064 | |
| 3065 | cluster_corrupt_out: |
| 3066 | /* |
| 3067 | * Corruption detected in the clustering loop. Invalidate the |
| 3068 | * inode buffer and shut down the filesystem. |
| 3069 | */ |
| 3070 | read_unlock(&pag->pag_ici_lock); |
| 3071 | /* |
| 3072 | * Clean up the buffer. If it was B_DELWRI, just release it -- |
| 3073 | * brelse can handle it with no problems. If not, shut down the |
| 3074 | * filesystem before releasing the buffer. |
| 3075 | */ |
| 3076 | bufwasdelwri = XFS_BUF_ISDELAYWRITE(bp); |
| 3077 | if (bufwasdelwri) |
| 3078 | xfs_buf_relse(bp); |
| 3079 | |
| 3080 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
| 3081 | |
| 3082 | if (!bufwasdelwri) { |
| 3083 | /* |
| 3084 | * Just like incore_relse: if we have b_iodone functions, |
| 3085 | * mark the buffer as an error and call them. Otherwise |
| 3086 | * mark it as stale and brelse. |
| 3087 | */ |
| 3088 | if (XFS_BUF_IODONE_FUNC(bp)) { |
| 3089 | XFS_BUF_CLR_BDSTRAT_FUNC(bp); |
| 3090 | XFS_BUF_UNDONE(bp); |
| 3091 | XFS_BUF_STALE(bp); |
| 3092 | XFS_BUF_SHUT(bp); |
| 3093 | XFS_BUF_ERROR(bp,EIO); |
| 3094 | xfs_biodone(bp); |
| 3095 | } else { |
| 3096 | XFS_BUF_STALE(bp); |
| 3097 | xfs_buf_relse(bp); |
| 3098 | } |
| 3099 | } |
| 3100 | |
| 3101 | /* |
| 3102 | * Unlocks the flush lock |
| 3103 | */ |
| 3104 | xfs_iflush_abort(iq); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3105 | kmem_free(ilist); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3106 | return XFS_ERROR(EFSCORRUPTED); |
| 3107 | } |
| 3108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3109 | /* |
| 3110 | * xfs_iflush() will write a modified inode's changes out to the |
| 3111 | * inode's on disk home. The caller must have the inode lock held |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 3112 | * in at least shared mode and the inode flush completion must be |
| 3113 | * active as well. The inode lock will still be held upon return from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3114 | * the call and the caller is free to unlock it. |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 3115 | * The inode flush will be completed when the inode reaches the disk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | * The flags indicate how the inode's buffer should be written out. |
| 3117 | */ |
| 3118 | int |
| 3119 | xfs_iflush( |
| 3120 | xfs_inode_t *ip, |
| 3121 | uint flags) |
| 3122 | { |
| 3123 | xfs_inode_log_item_t *iip; |
| 3124 | xfs_buf_t *bp; |
| 3125 | xfs_dinode_t *dip; |
| 3126 | xfs_mount_t *mp; |
| 3127 | int error; |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3128 | int noblock = (flags == XFS_IFLUSH_ASYNC_NOBLOCK); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3129 | enum { INT_DELWRI = (1 << 0), INT_ASYNC = (1 << 1) }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | |
| 3131 | XFS_STATS_INC(xs_iflush_count); |
| 3132 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 3133 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 3134 | ASSERT(!completion_done(&ip->i_flush)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
| 3136 | ip->i_d.di_nextents > ip->i_df.if_ext_max); |
| 3137 | |
| 3138 | iip = ip->i_itemp; |
| 3139 | mp = ip->i_mount; |
| 3140 | |
| 3141 | /* |
| 3142 | * If the inode isn't dirty, then just release the inode |
| 3143 | * flush lock and do nothing. |
| 3144 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 3145 | if (xfs_inode_clean(ip)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3146 | xfs_ifunlock(ip); |
| 3147 | return 0; |
| 3148 | } |
| 3149 | |
| 3150 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3151 | * We can't flush the inode until it is unpinned, so wait for it if we |
| 3152 | * are allowed to block. We know noone new can pin it, because we are |
| 3153 | * holding the inode lock shared and you need to hold it exclusively to |
| 3154 | * pin the inode. |
| 3155 | * |
| 3156 | * If we are not allowed to block, force the log out asynchronously so |
| 3157 | * that when we come back the inode will be unpinned. If other inodes |
| 3158 | * in the same cluster are dirty, they will probably write the inode |
| 3159 | * out for us if they occur after the log force completes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3160 | */ |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3161 | if (noblock && xfs_ipincount(ip)) { |
| 3162 | xfs_iunpin_nowait(ip); |
| 3163 | xfs_ifunlock(ip); |
| 3164 | return EAGAIN; |
| 3165 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3166 | xfs_iunpin_wait(ip); |
| 3167 | |
| 3168 | /* |
| 3169 | * This may have been unpinned because the filesystem is shutting |
| 3170 | * down forcibly. If that's the case we must not write this inode |
| 3171 | * to disk, because the log record didn't make it to disk! |
| 3172 | */ |
| 3173 | if (XFS_FORCED_SHUTDOWN(mp)) { |
| 3174 | ip->i_update_core = 0; |
| 3175 | if (iip) |
| 3176 | iip->ili_format.ilf_fields = 0; |
| 3177 | xfs_ifunlock(ip); |
| 3178 | return XFS_ERROR(EIO); |
| 3179 | } |
| 3180 | |
| 3181 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | * Decide how buffer will be flushed out. This is done before |
| 3183 | * the call to xfs_iflush_int because this field is zeroed by it. |
| 3184 | */ |
| 3185 | if (iip != NULL && iip->ili_format.ilf_fields != 0) { |
| 3186 | /* |
| 3187 | * Flush out the inode buffer according to the directions |
| 3188 | * of the caller. In the cases where the caller has given |
| 3189 | * us a choice choose the non-delwri case. This is because |
| 3190 | * the inode is in the AIL and we need to get it out soon. |
| 3191 | */ |
| 3192 | switch (flags) { |
| 3193 | case XFS_IFLUSH_SYNC: |
| 3194 | case XFS_IFLUSH_DELWRI_ELSE_SYNC: |
| 3195 | flags = 0; |
| 3196 | break; |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3197 | case XFS_IFLUSH_ASYNC_NOBLOCK: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3198 | case XFS_IFLUSH_ASYNC: |
| 3199 | case XFS_IFLUSH_DELWRI_ELSE_ASYNC: |
| 3200 | flags = INT_ASYNC; |
| 3201 | break; |
| 3202 | case XFS_IFLUSH_DELWRI: |
| 3203 | flags = INT_DELWRI; |
| 3204 | break; |
| 3205 | default: |
| 3206 | ASSERT(0); |
| 3207 | flags = 0; |
| 3208 | break; |
| 3209 | } |
| 3210 | } else { |
| 3211 | switch (flags) { |
| 3212 | case XFS_IFLUSH_DELWRI_ELSE_SYNC: |
| 3213 | case XFS_IFLUSH_DELWRI_ELSE_ASYNC: |
| 3214 | case XFS_IFLUSH_DELWRI: |
| 3215 | flags = INT_DELWRI; |
| 3216 | break; |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3217 | case XFS_IFLUSH_ASYNC_NOBLOCK: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | case XFS_IFLUSH_ASYNC: |
| 3219 | flags = INT_ASYNC; |
| 3220 | break; |
| 3221 | case XFS_IFLUSH_SYNC: |
| 3222 | flags = 0; |
| 3223 | break; |
| 3224 | default: |
| 3225 | ASSERT(0); |
| 3226 | flags = 0; |
| 3227 | break; |
| 3228 | } |
| 3229 | } |
| 3230 | |
| 3231 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3232 | * Get the buffer containing the on-disk inode. |
| 3233 | */ |
| 3234 | error = xfs_itobp(mp, NULL, ip, &dip, &bp, 0, 0, |
| 3235 | noblock ? XFS_BUF_TRYLOCK : XFS_BUF_LOCK); |
| 3236 | if (error || !bp) { |
| 3237 | xfs_ifunlock(ip); |
| 3238 | return error; |
| 3239 | } |
| 3240 | |
| 3241 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | * First flush out the inode that xfs_iflush was called with. |
| 3243 | */ |
| 3244 | error = xfs_iflush_int(ip, bp); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3245 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | goto corrupt_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3247 | |
| 3248 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 3249 | * If the buffer is pinned then push on the log now so we won't |
| 3250 | * get stuck waiting in the write for too long. |
| 3251 | */ |
| 3252 | if (XFS_BUF_ISPINNED(bp)) |
| 3253 | xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE); |
| 3254 | |
| 3255 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | * inode clustering: |
| 3257 | * see if other inodes can be gathered into this write |
| 3258 | */ |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3259 | error = xfs_iflush_cluster(ip, bp); |
| 3260 | if (error) |
| 3261 | goto cluster_corrupt_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3263 | if (flags & INT_DELWRI) { |
| 3264 | xfs_bdwrite(mp, bp); |
| 3265 | } else if (flags & INT_ASYNC) { |
David Chinner | db7a19f | 2008-04-10 12:22:24 +1000 | [diff] [blame] | 3266 | error = xfs_bawrite(mp, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | } else { |
| 3268 | error = xfs_bwrite(mp, bp); |
| 3269 | } |
| 3270 | return error; |
| 3271 | |
| 3272 | corrupt_out: |
| 3273 | xfs_buf_relse(bp); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 3274 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3275 | cluster_corrupt_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | /* |
| 3277 | * Unlocks the flush lock |
| 3278 | */ |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 3279 | xfs_iflush_abort(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3280 | return XFS_ERROR(EFSCORRUPTED); |
| 3281 | } |
| 3282 | |
| 3283 | |
| 3284 | STATIC int |
| 3285 | xfs_iflush_int( |
| 3286 | xfs_inode_t *ip, |
| 3287 | xfs_buf_t *bp) |
| 3288 | { |
| 3289 | xfs_inode_log_item_t *iip; |
| 3290 | xfs_dinode_t *dip; |
| 3291 | xfs_mount_t *mp; |
| 3292 | #ifdef XFS_TRANS_DEBUG |
| 3293 | int first; |
| 3294 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 3296 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 3297 | ASSERT(!completion_done(&ip->i_flush)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3298 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
| 3299 | ip->i_d.di_nextents > ip->i_df.if_ext_max); |
| 3300 | |
| 3301 | iip = ip->i_itemp; |
| 3302 | mp = ip->i_mount; |
| 3303 | |
| 3304 | |
| 3305 | /* |
| 3306 | * If the inode isn't dirty, then just release the inode |
| 3307 | * flush lock and do nothing. |
| 3308 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 3309 | if (xfs_inode_clean(ip)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3310 | xfs_ifunlock(ip); |
| 3311 | return 0; |
| 3312 | } |
| 3313 | |
| 3314 | /* set *dip = inode's place in the buffer */ |
| 3315 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_boffset); |
| 3316 | |
| 3317 | /* |
| 3318 | * Clear i_update_core before copying out the data. |
| 3319 | * This is for coordination with our timestamp updates |
| 3320 | * that don't hold the inode lock. They will always |
| 3321 | * update the timestamps BEFORE setting i_update_core, |
| 3322 | * so if we clear i_update_core after they set it we |
| 3323 | * are guaranteed to see their updates to the timestamps. |
| 3324 | * I believe that this depends on strongly ordered memory |
| 3325 | * semantics, but we have that. We use the SYNCHRONIZE |
| 3326 | * macro to make sure that the compiler does not reorder |
| 3327 | * the i_update_core access below the data copy below. |
| 3328 | */ |
| 3329 | ip->i_update_core = 0; |
| 3330 | SYNCHRONIZE(); |
| 3331 | |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 3332 | /* |
| 3333 | * Make sure to get the latest atime from the Linux inode. |
| 3334 | */ |
| 3335 | xfs_synchronize_atime(ip); |
| 3336 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 3337 | if (XFS_TEST_ERROR(be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3338 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
| 3339 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3340 | "xfs_iflush: Bad inode %Lu magic number 0x%x, ptr 0x%p", |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 3341 | ip->i_ino, be16_to_cpu(dip->di_core.di_magic), dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3342 | goto corrupt_out; |
| 3343 | } |
| 3344 | if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC, |
| 3345 | mp, XFS_ERRTAG_IFLUSH_2, XFS_RANDOM_IFLUSH_2)) { |
| 3346 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3347 | "xfs_iflush: Bad inode %Lu, ptr 0x%p, magic number 0x%x", |
| 3348 | ip->i_ino, ip, ip->i_d.di_magic); |
| 3349 | goto corrupt_out; |
| 3350 | } |
| 3351 | if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { |
| 3352 | if (XFS_TEST_ERROR( |
| 3353 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && |
| 3354 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), |
| 3355 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { |
| 3356 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3357 | "xfs_iflush: Bad regular inode %Lu, ptr 0x%p", |
| 3358 | ip->i_ino, ip); |
| 3359 | goto corrupt_out; |
| 3360 | } |
| 3361 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| 3362 | if (XFS_TEST_ERROR( |
| 3363 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && |
| 3364 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
| 3365 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), |
| 3366 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { |
| 3367 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3368 | "xfs_iflush: Bad directory inode %Lu, ptr 0x%p", |
| 3369 | ip->i_ino, ip); |
| 3370 | goto corrupt_out; |
| 3371 | } |
| 3372 | } |
| 3373 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > |
| 3374 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, |
| 3375 | XFS_RANDOM_IFLUSH_5)) { |
| 3376 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3377 | "xfs_iflush: detected corrupt incore inode %Lu, total extents = %d, nblocks = %Ld, ptr 0x%p", |
| 3378 | ip->i_ino, |
| 3379 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
| 3380 | ip->i_d.di_nblocks, |
| 3381 | ip); |
| 3382 | goto corrupt_out; |
| 3383 | } |
| 3384 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, |
| 3385 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { |
| 3386 | xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, |
| 3387 | "xfs_iflush: bad inode %Lu, forkoff 0x%x, ptr 0x%p", |
| 3388 | ip->i_ino, ip->i_d.di_forkoff, ip); |
| 3389 | goto corrupt_out; |
| 3390 | } |
| 3391 | /* |
| 3392 | * bump the flush iteration count, used to detect flushes which |
| 3393 | * postdate a log record during recovery. |
| 3394 | */ |
| 3395 | |
| 3396 | ip->i_d.di_flushiter++; |
| 3397 | |
| 3398 | /* |
| 3399 | * Copy the dirty parts of the inode into the on-disk |
| 3400 | * inode. We always copy out the core of the inode, |
| 3401 | * because if the inode is dirty at all the core must |
| 3402 | * be. |
| 3403 | */ |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 3404 | xfs_dinode_to_disk(&dip->di_core, &ip->i_d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | |
| 3406 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ |
| 3407 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) |
| 3408 | ip->i_d.di_flushiter = 0; |
| 3409 | |
| 3410 | /* |
| 3411 | * If this is really an old format inode and the superblock version |
| 3412 | * has not been updated to support only new format inodes, then |
| 3413 | * convert back to the old inode format. If the superblock version |
| 3414 | * has been updated, then make the conversion permanent. |
| 3415 | */ |
| 3416 | ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1 || |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3417 | xfs_sb_version_hasnlink(&mp->m_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | if (ip->i_d.di_version == XFS_DINODE_VERSION_1) { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3419 | if (!xfs_sb_version_hasnlink(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3420 | /* |
| 3421 | * Convert it back. |
| 3422 | */ |
| 3423 | ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 3424 | dip->di_core.di_onlink = cpu_to_be16(ip->i_d.di_nlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3425 | } else { |
| 3426 | /* |
| 3427 | * The superblock version has already been bumped, |
| 3428 | * so just make the conversion to the new inode |
| 3429 | * format permanent. |
| 3430 | */ |
| 3431 | ip->i_d.di_version = XFS_DINODE_VERSION_2; |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 3432 | dip->di_core.di_version = XFS_DINODE_VERSION_2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3433 | ip->i_d.di_onlink = 0; |
| 3434 | dip->di_core.di_onlink = 0; |
| 3435 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
| 3436 | memset(&(dip->di_core.di_pad[0]), 0, |
| 3437 | sizeof(dip->di_core.di_pad)); |
| 3438 | ASSERT(ip->i_d.di_projid == 0); |
| 3439 | } |
| 3440 | } |
| 3441 | |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 3442 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK, bp); |
| 3443 | if (XFS_IFORK_Q(ip)) |
| 3444 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | xfs_inobp_check(mp, bp); |
| 3446 | |
| 3447 | /* |
| 3448 | * We've recorded everything logged in the inode, so we'd |
| 3449 | * like to clear the ilf_fields bits so we don't log and |
| 3450 | * flush things unnecessarily. However, we can't stop |
| 3451 | * logging all this information until the data we've copied |
| 3452 | * into the disk buffer is written to disk. If we did we might |
| 3453 | * overwrite the copy of the inode in the log with all the |
| 3454 | * data after re-logging only part of it, and in the face of |
| 3455 | * a crash we wouldn't have all the data we need to recover. |
| 3456 | * |
| 3457 | * What we do is move the bits to the ili_last_fields field. |
| 3458 | * When logging the inode, these bits are moved back to the |
| 3459 | * ilf_fields field. In the xfs_iflush_done() routine we |
| 3460 | * clear ili_last_fields, since we know that the information |
| 3461 | * those bits represent is permanently on disk. As long as |
| 3462 | * the flush completes before the inode is logged again, then |
| 3463 | * both ilf_fields and ili_last_fields will be cleared. |
| 3464 | * |
| 3465 | * We can play with the ilf_fields bits here, because the inode |
| 3466 | * lock must be held exclusively in order to set bits there |
| 3467 | * and the flush lock protects the ili_last_fields bits. |
| 3468 | * Set ili_logged so the flush done |
| 3469 | * routine can tell whether or not to look in the AIL. |
| 3470 | * Also, store the current LSN of the inode so that we can tell |
| 3471 | * whether the item has moved in the AIL from xfs_iflush_done(). |
| 3472 | * In order to read the lsn we need the AIL lock, because |
| 3473 | * it is a 64 bit value that cannot be read atomically. |
| 3474 | */ |
| 3475 | if (iip != NULL && iip->ili_format.ilf_fields != 0) { |
| 3476 | iip->ili_last_fields = iip->ili_format.ilf_fields; |
| 3477 | iip->ili_format.ilf_fields = 0; |
| 3478 | iip->ili_logged = 1; |
| 3479 | |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 3480 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
| 3481 | &iip->ili_item.li_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3482 | |
| 3483 | /* |
| 3484 | * Attach the function xfs_iflush_done to the inode's |
| 3485 | * buffer. This will remove the inode from the AIL |
| 3486 | * and unlock the inode's flush lock when the inode is |
| 3487 | * completely written to disk. |
| 3488 | */ |
| 3489 | xfs_buf_attach_iodone(bp, (void(*)(xfs_buf_t*,xfs_log_item_t*)) |
| 3490 | xfs_iflush_done, (xfs_log_item_t *)iip); |
| 3491 | |
| 3492 | ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL); |
| 3493 | ASSERT(XFS_BUF_IODONE_FUNC(bp) != NULL); |
| 3494 | } else { |
| 3495 | /* |
| 3496 | * We're flushing an inode which is not in the AIL and has |
| 3497 | * not been logged but has i_update_core set. For this |
| 3498 | * case we can use a B_DELWRI flush and immediately drop |
| 3499 | * the inode flush lock because we can avoid the whole |
| 3500 | * AIL state thing. It's OK to drop the flush lock now, |
| 3501 | * because we've already locked the buffer and to do anything |
| 3502 | * you really need both. |
| 3503 | */ |
| 3504 | if (iip != NULL) { |
| 3505 | ASSERT(iip->ili_logged == 0); |
| 3506 | ASSERT(iip->ili_last_fields == 0); |
| 3507 | ASSERT((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0); |
| 3508 | } |
| 3509 | xfs_ifunlock(ip); |
| 3510 | } |
| 3511 | |
| 3512 | return 0; |
| 3513 | |
| 3514 | corrupt_out: |
| 3515 | return XFS_ERROR(EFSCORRUPTED); |
| 3516 | } |
| 3517 | |
| 3518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3520 | #ifdef XFS_ILOCK_TRACE |
| 3521 | ktrace_t *xfs_ilock_trace_buf; |
| 3522 | |
| 3523 | void |
| 3524 | xfs_ilock_trace(xfs_inode_t *ip, int lock, unsigned int lockflags, inst_t *ra) |
| 3525 | { |
| 3526 | ktrace_enter(ip->i_lock_trace, |
| 3527 | (void *)ip, |
| 3528 | (void *)(unsigned long)lock, /* 1 = LOCK, 3=UNLOCK, etc */ |
| 3529 | (void *)(unsigned long)lockflags, /* XFS_ILOCK_EXCL etc */ |
| 3530 | (void *)ra, /* caller of ilock */ |
| 3531 | (void *)(unsigned long)current_cpu(), |
| 3532 | (void *)(unsigned long)current_pid(), |
| 3533 | NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL); |
| 3534 | } |
| 3535 | #endif |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3536 | |
| 3537 | /* |
| 3538 | * Return a pointer to the extent record at file index idx. |
| 3539 | */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3540 | xfs_bmbt_rec_host_t * |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3541 | xfs_iext_get_ext( |
| 3542 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3543 | xfs_extnum_t idx) /* index of target extent */ |
| 3544 | { |
| 3545 | ASSERT(idx >= 0); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3546 | if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) { |
| 3547 | return ifp->if_u1.if_ext_irec->er_extbuf; |
| 3548 | } else if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3549 | xfs_ext_irec_t *erp; /* irec pointer */ |
| 3550 | int erp_idx = 0; /* irec index */ |
| 3551 | xfs_extnum_t page_idx = idx; /* ext index in target list */ |
| 3552 | |
| 3553 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); |
| 3554 | return &erp->er_extbuf[page_idx]; |
| 3555 | } else if (ifp->if_bytes) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3556 | return &ifp->if_u1.if_extents[idx]; |
| 3557 | } else { |
| 3558 | return NULL; |
| 3559 | } |
| 3560 | } |
| 3561 | |
| 3562 | /* |
| 3563 | * Insert new item(s) into the extent records for incore inode |
| 3564 | * fork 'ifp'. 'count' new items are inserted at index 'idx'. |
| 3565 | */ |
| 3566 | void |
| 3567 | xfs_iext_insert( |
| 3568 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3569 | xfs_extnum_t idx, /* starting index of new items */ |
| 3570 | xfs_extnum_t count, /* number of inserted items */ |
| 3571 | xfs_bmbt_irec_t *new) /* items to insert */ |
| 3572 | { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3573 | xfs_extnum_t i; /* extent record index */ |
| 3574 | |
| 3575 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| 3576 | xfs_iext_add(ifp, idx, count); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3577 | for (i = idx; i < idx + count; i++, new++) |
| 3578 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, i), new); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3579 | } |
| 3580 | |
| 3581 | /* |
| 3582 | * This is called when the amount of space required for incore file |
| 3583 | * extents needs to be increased. The ext_diff parameter stores the |
| 3584 | * number of new extents being added and the idx parameter contains |
| 3585 | * the extent index where the new extents will be added. If the new |
| 3586 | * extents are being appended, then we just need to (re)allocate and |
| 3587 | * initialize the space. Otherwise, if the new extents are being |
| 3588 | * inserted into the middle of the existing entries, a bit more work |
| 3589 | * is required to make room for the new extents to be inserted. The |
| 3590 | * caller is responsible for filling in the new extent entries upon |
| 3591 | * return. |
| 3592 | */ |
| 3593 | void |
| 3594 | xfs_iext_add( |
| 3595 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3596 | xfs_extnum_t idx, /* index to begin adding exts */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3597 | int ext_diff) /* number of extents to add */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3598 | { |
| 3599 | int byte_diff; /* new bytes being added */ |
| 3600 | int new_size; /* size of extents after adding */ |
| 3601 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3602 | |
| 3603 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3604 | ASSERT((idx >= 0) && (idx <= nextents)); |
| 3605 | byte_diff = ext_diff * sizeof(xfs_bmbt_rec_t); |
| 3606 | new_size = ifp->if_bytes + byte_diff; |
| 3607 | /* |
| 3608 | * If the new number of extents (nextents + ext_diff) |
| 3609 | * fits inside the inode, then continue to use the inline |
| 3610 | * extent buffer. |
| 3611 | */ |
| 3612 | if (nextents + ext_diff <= XFS_INLINE_EXTS) { |
| 3613 | if (idx < nextents) { |
| 3614 | memmove(&ifp->if_u2.if_inline_ext[idx + ext_diff], |
| 3615 | &ifp->if_u2.if_inline_ext[idx], |
| 3616 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); |
| 3617 | memset(&ifp->if_u2.if_inline_ext[idx], 0, byte_diff); |
| 3618 | } |
| 3619 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
| 3620 | ifp->if_real_bytes = 0; |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3621 | ifp->if_lastex = nextents + ext_diff; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3622 | } |
| 3623 | /* |
| 3624 | * Otherwise use a linear (direct) extent list. |
| 3625 | * If the extents are currently inside the inode, |
| 3626 | * xfs_iext_realloc_direct will switch us from |
| 3627 | * inline to direct extent allocation mode. |
| 3628 | */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3629 | else if (nextents + ext_diff <= XFS_LINEAR_EXTS) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3630 | xfs_iext_realloc_direct(ifp, new_size); |
| 3631 | if (idx < nextents) { |
| 3632 | memmove(&ifp->if_u1.if_extents[idx + ext_diff], |
| 3633 | &ifp->if_u1.if_extents[idx], |
| 3634 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); |
| 3635 | memset(&ifp->if_u1.if_extents[idx], 0, byte_diff); |
| 3636 | } |
| 3637 | } |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3638 | /* Indirection array */ |
| 3639 | else { |
| 3640 | xfs_ext_irec_t *erp; |
| 3641 | int erp_idx = 0; |
| 3642 | int page_idx = idx; |
| 3643 | |
| 3644 | ASSERT(nextents + ext_diff > XFS_LINEAR_EXTS); |
| 3645 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3646 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 1); |
| 3647 | } else { |
| 3648 | xfs_iext_irec_init(ifp); |
| 3649 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3650 | erp = ifp->if_u1.if_ext_irec; |
| 3651 | } |
| 3652 | /* Extents fit in target extent page */ |
| 3653 | if (erp && erp->er_extcount + ext_diff <= XFS_LINEAR_EXTS) { |
| 3654 | if (page_idx < erp->er_extcount) { |
| 3655 | memmove(&erp->er_extbuf[page_idx + ext_diff], |
| 3656 | &erp->er_extbuf[page_idx], |
| 3657 | (erp->er_extcount - page_idx) * |
| 3658 | sizeof(xfs_bmbt_rec_t)); |
| 3659 | memset(&erp->er_extbuf[page_idx], 0, byte_diff); |
| 3660 | } |
| 3661 | erp->er_extcount += ext_diff; |
| 3662 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3663 | } |
| 3664 | /* Insert a new extent page */ |
| 3665 | else if (erp) { |
| 3666 | xfs_iext_add_indirect_multi(ifp, |
| 3667 | erp_idx, page_idx, ext_diff); |
| 3668 | } |
| 3669 | /* |
| 3670 | * If extent(s) are being appended to the last page in |
| 3671 | * the indirection array and the new extent(s) don't fit |
| 3672 | * in the page, then erp is NULL and erp_idx is set to |
| 3673 | * the next index needed in the indirection array. |
| 3674 | */ |
| 3675 | else { |
| 3676 | int count = ext_diff; |
| 3677 | |
| 3678 | while (count) { |
| 3679 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3680 | erp->er_extcount = count; |
| 3681 | count -= MIN(count, (int)XFS_LINEAR_EXTS); |
| 3682 | if (count) { |
| 3683 | erp_idx++; |
| 3684 | } |
| 3685 | } |
| 3686 | } |
| 3687 | } |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3688 | ifp->if_bytes = new_size; |
| 3689 | } |
| 3690 | |
| 3691 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3692 | * This is called when incore extents are being added to the indirection |
| 3693 | * array and the new extents do not fit in the target extent list. The |
| 3694 | * erp_idx parameter contains the irec index for the target extent list |
| 3695 | * in the indirection array, and the idx parameter contains the extent |
| 3696 | * index within the list. The number of extents being added is stored |
| 3697 | * in the count parameter. |
| 3698 | * |
| 3699 | * |-------| |-------| |
| 3700 | * | | | | idx - number of extents before idx |
| 3701 | * | idx | | count | |
| 3702 | * | | | | count - number of extents being inserted at idx |
| 3703 | * |-------| |-------| |
| 3704 | * | count | | nex2 | nex2 - number of extents after idx + count |
| 3705 | * |-------| |-------| |
| 3706 | */ |
| 3707 | void |
| 3708 | xfs_iext_add_indirect_multi( |
| 3709 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3710 | int erp_idx, /* target extent irec index */ |
| 3711 | xfs_extnum_t idx, /* index within target list */ |
| 3712 | int count) /* new extents being added */ |
| 3713 | { |
| 3714 | int byte_diff; /* new bytes being added */ |
| 3715 | xfs_ext_irec_t *erp; /* pointer to irec entry */ |
| 3716 | xfs_extnum_t ext_diff; /* number of extents to add */ |
| 3717 | xfs_extnum_t ext_cnt; /* new extents still needed */ |
| 3718 | xfs_extnum_t nex2; /* extents after idx + count */ |
| 3719 | xfs_bmbt_rec_t *nex2_ep = NULL; /* temp list for nex2 extents */ |
| 3720 | int nlists; /* number of irec's (lists) */ |
| 3721 | |
| 3722 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3723 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3724 | nex2 = erp->er_extcount - idx; |
| 3725 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3726 | |
| 3727 | /* |
| 3728 | * Save second part of target extent list |
| 3729 | * (all extents past */ |
| 3730 | if (nex2) { |
| 3731 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3732 | nex2_ep = (xfs_bmbt_rec_t *) kmem_alloc(byte_diff, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3733 | memmove(nex2_ep, &erp->er_extbuf[idx], byte_diff); |
| 3734 | erp->er_extcount -= nex2; |
| 3735 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -nex2); |
| 3736 | memset(&erp->er_extbuf[idx], 0, byte_diff); |
| 3737 | } |
| 3738 | |
| 3739 | /* |
| 3740 | * Add the new extents to the end of the target |
| 3741 | * list, then allocate new irec record(s) and |
| 3742 | * extent buffer(s) as needed to store the rest |
| 3743 | * of the new extents. |
| 3744 | */ |
| 3745 | ext_cnt = count; |
| 3746 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS - erp->er_extcount); |
| 3747 | if (ext_diff) { |
| 3748 | erp->er_extcount += ext_diff; |
| 3749 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3750 | ext_cnt -= ext_diff; |
| 3751 | } |
| 3752 | while (ext_cnt) { |
| 3753 | erp_idx++; |
| 3754 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3755 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS); |
| 3756 | erp->er_extcount = ext_diff; |
| 3757 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3758 | ext_cnt -= ext_diff; |
| 3759 | } |
| 3760 | |
| 3761 | /* Add nex2 extents back to indirection array */ |
| 3762 | if (nex2) { |
| 3763 | xfs_extnum_t ext_avail; |
| 3764 | int i; |
| 3765 | |
| 3766 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); |
| 3767 | ext_avail = XFS_LINEAR_EXTS - erp->er_extcount; |
| 3768 | i = 0; |
| 3769 | /* |
| 3770 | * If nex2 extents fit in the current page, append |
| 3771 | * nex2_ep after the new extents. |
| 3772 | */ |
| 3773 | if (nex2 <= ext_avail) { |
| 3774 | i = erp->er_extcount; |
| 3775 | } |
| 3776 | /* |
| 3777 | * Otherwise, check if space is available in the |
| 3778 | * next page. |
| 3779 | */ |
| 3780 | else if ((erp_idx < nlists - 1) && |
| 3781 | (nex2 <= (ext_avail = XFS_LINEAR_EXTS - |
| 3782 | ifp->if_u1.if_ext_irec[erp_idx+1].er_extcount))) { |
| 3783 | erp_idx++; |
| 3784 | erp++; |
| 3785 | /* Create a hole for nex2 extents */ |
| 3786 | memmove(&erp->er_extbuf[nex2], erp->er_extbuf, |
| 3787 | erp->er_extcount * sizeof(xfs_bmbt_rec_t)); |
| 3788 | } |
| 3789 | /* |
| 3790 | * Final choice, create a new extent page for |
| 3791 | * nex2 extents. |
| 3792 | */ |
| 3793 | else { |
| 3794 | erp_idx++; |
| 3795 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3796 | } |
| 3797 | memmove(&erp->er_extbuf[i], nex2_ep, byte_diff); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3798 | kmem_free(nex2_ep); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3799 | erp->er_extcount += nex2; |
| 3800 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, nex2); |
| 3801 | } |
| 3802 | } |
| 3803 | |
| 3804 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3805 | * This is called when the amount of space required for incore file |
| 3806 | * extents needs to be decreased. The ext_diff parameter stores the |
| 3807 | * number of extents to be removed and the idx parameter contains |
| 3808 | * the extent index where the extents will be removed from. |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3809 | * |
| 3810 | * If the amount of space needed has decreased below the linear |
| 3811 | * limit, XFS_IEXT_BUFSZ, then switch to using the contiguous |
| 3812 | * extent array. Otherwise, use kmem_realloc() to adjust the |
| 3813 | * size to what is needed. |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3814 | */ |
| 3815 | void |
| 3816 | xfs_iext_remove( |
| 3817 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3818 | xfs_extnum_t idx, /* index to begin removing exts */ |
| 3819 | int ext_diff) /* number of extents to remove */ |
| 3820 | { |
| 3821 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3822 | int new_size; /* size of extents after removal */ |
| 3823 | |
| 3824 | ASSERT(ext_diff > 0); |
| 3825 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3826 | new_size = (nextents - ext_diff) * sizeof(xfs_bmbt_rec_t); |
| 3827 | |
| 3828 | if (new_size == 0) { |
| 3829 | xfs_iext_destroy(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3830 | } else if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3831 | xfs_iext_remove_indirect(ifp, idx, ext_diff); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3832 | } else if (ifp->if_real_bytes) { |
| 3833 | xfs_iext_remove_direct(ifp, idx, ext_diff); |
| 3834 | } else { |
| 3835 | xfs_iext_remove_inline(ifp, idx, ext_diff); |
| 3836 | } |
| 3837 | ifp->if_bytes = new_size; |
| 3838 | } |
| 3839 | |
| 3840 | /* |
| 3841 | * This removes ext_diff extents from the inline buffer, beginning |
| 3842 | * at extent index idx. |
| 3843 | */ |
| 3844 | void |
| 3845 | xfs_iext_remove_inline( |
| 3846 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3847 | xfs_extnum_t idx, /* index to begin removing exts */ |
| 3848 | int ext_diff) /* number of extents to remove */ |
| 3849 | { |
| 3850 | int nextents; /* number of extents in file */ |
| 3851 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3852 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3853 | ASSERT(idx < XFS_INLINE_EXTS); |
| 3854 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3855 | ASSERT(((nextents - ext_diff) > 0) && |
| 3856 | (nextents - ext_diff) < XFS_INLINE_EXTS); |
| 3857 | |
| 3858 | if (idx + ext_diff < nextents) { |
| 3859 | memmove(&ifp->if_u2.if_inline_ext[idx], |
| 3860 | &ifp->if_u2.if_inline_ext[idx + ext_diff], |
| 3861 | (nextents - (idx + ext_diff)) * |
| 3862 | sizeof(xfs_bmbt_rec_t)); |
| 3863 | memset(&ifp->if_u2.if_inline_ext[nextents - ext_diff], |
| 3864 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3865 | } else { |
| 3866 | memset(&ifp->if_u2.if_inline_ext[idx], 0, |
| 3867 | ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3868 | } |
| 3869 | } |
| 3870 | |
| 3871 | /* |
| 3872 | * This removes ext_diff extents from a linear (direct) extent list, |
| 3873 | * beginning at extent index idx. If the extents are being removed |
| 3874 | * from the end of the list (ie. truncate) then we just need to re- |
| 3875 | * allocate the list to remove the extra space. Otherwise, if the |
| 3876 | * extents are being removed from the middle of the existing extent |
| 3877 | * entries, then we first need to move the extent records beginning |
| 3878 | * at idx + ext_diff up in the list to overwrite the records being |
| 3879 | * removed, then remove the extra space via kmem_realloc. |
| 3880 | */ |
| 3881 | void |
| 3882 | xfs_iext_remove_direct( |
| 3883 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3884 | xfs_extnum_t idx, /* index to begin removing exts */ |
| 3885 | int ext_diff) /* number of extents to remove */ |
| 3886 | { |
| 3887 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3888 | int new_size; /* size of extents after removal */ |
| 3889 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3890 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3891 | new_size = ifp->if_bytes - |
| 3892 | (ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3893 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3894 | |
| 3895 | if (new_size == 0) { |
| 3896 | xfs_iext_destroy(ifp); |
| 3897 | return; |
| 3898 | } |
| 3899 | /* Move extents up in the list (if needed) */ |
| 3900 | if (idx + ext_diff < nextents) { |
| 3901 | memmove(&ifp->if_u1.if_extents[idx], |
| 3902 | &ifp->if_u1.if_extents[idx + ext_diff], |
| 3903 | (nextents - (idx + ext_diff)) * |
| 3904 | sizeof(xfs_bmbt_rec_t)); |
| 3905 | } |
| 3906 | memset(&ifp->if_u1.if_extents[nextents - ext_diff], |
| 3907 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3908 | /* |
| 3909 | * Reallocate the direct extent list. If the extents |
| 3910 | * will fit inside the inode then xfs_iext_realloc_direct |
| 3911 | * will switch from direct to inline extent allocation |
| 3912 | * mode for us. |
| 3913 | */ |
| 3914 | xfs_iext_realloc_direct(ifp, new_size); |
| 3915 | ifp->if_bytes = new_size; |
| 3916 | } |
| 3917 | |
| 3918 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3919 | * This is called when incore extents are being removed from the |
| 3920 | * indirection array and the extents being removed span multiple extent |
| 3921 | * buffers. The idx parameter contains the file extent index where we |
| 3922 | * want to begin removing extents, and the count parameter contains |
| 3923 | * how many extents need to be removed. |
| 3924 | * |
| 3925 | * |-------| |-------| |
| 3926 | * | nex1 | | | nex1 - number of extents before idx |
| 3927 | * |-------| | count | |
| 3928 | * | | | | count - number of extents being removed at idx |
| 3929 | * | count | |-------| |
| 3930 | * | | | nex2 | nex2 - number of extents after idx + count |
| 3931 | * |-------| |-------| |
| 3932 | */ |
| 3933 | void |
| 3934 | xfs_iext_remove_indirect( |
| 3935 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3936 | xfs_extnum_t idx, /* index to begin removing extents */ |
| 3937 | int count) /* number of extents to remove */ |
| 3938 | { |
| 3939 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 3940 | int erp_idx = 0; /* indirection array index */ |
| 3941 | xfs_extnum_t ext_cnt; /* extents left to remove */ |
| 3942 | xfs_extnum_t ext_diff; /* extents to remove in current list */ |
| 3943 | xfs_extnum_t nex1; /* number of extents before idx */ |
| 3944 | xfs_extnum_t nex2; /* extents after idx + count */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3945 | int nlists; /* entries in indirection array */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3946 | int page_idx = idx; /* index in target extent list */ |
| 3947 | |
| 3948 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3949 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); |
| 3950 | ASSERT(erp != NULL); |
| 3951 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3952 | nex1 = page_idx; |
| 3953 | ext_cnt = count; |
| 3954 | while (ext_cnt) { |
| 3955 | nex2 = MAX((erp->er_extcount - (nex1 + ext_cnt)), 0); |
| 3956 | ext_diff = MIN(ext_cnt, (erp->er_extcount - nex1)); |
| 3957 | /* |
| 3958 | * Check for deletion of entire list; |
| 3959 | * xfs_iext_irec_remove() updates extent offsets. |
| 3960 | */ |
| 3961 | if (ext_diff == erp->er_extcount) { |
| 3962 | xfs_iext_irec_remove(ifp, erp_idx); |
| 3963 | ext_cnt -= ext_diff; |
| 3964 | nex1 = 0; |
| 3965 | if (ext_cnt) { |
| 3966 | ASSERT(erp_idx < ifp->if_real_bytes / |
| 3967 | XFS_IEXT_BUFSZ); |
| 3968 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3969 | nex1 = 0; |
| 3970 | continue; |
| 3971 | } else { |
| 3972 | break; |
| 3973 | } |
| 3974 | } |
| 3975 | /* Move extents up (if needed) */ |
| 3976 | if (nex2) { |
| 3977 | memmove(&erp->er_extbuf[nex1], |
| 3978 | &erp->er_extbuf[nex1 + ext_diff], |
| 3979 | nex2 * sizeof(xfs_bmbt_rec_t)); |
| 3980 | } |
| 3981 | /* Zero out rest of page */ |
| 3982 | memset(&erp->er_extbuf[nex1 + nex2], 0, (XFS_IEXT_BUFSZ - |
| 3983 | ((nex1 + nex2) * sizeof(xfs_bmbt_rec_t)))); |
| 3984 | /* Update remaining counters */ |
| 3985 | erp->er_extcount -= ext_diff; |
| 3986 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -ext_diff); |
| 3987 | ext_cnt -= ext_diff; |
| 3988 | nex1 = 0; |
| 3989 | erp_idx++; |
| 3990 | erp++; |
| 3991 | } |
| 3992 | ifp->if_bytes -= count * sizeof(xfs_bmbt_rec_t); |
| 3993 | xfs_iext_irec_compact(ifp); |
| 3994 | } |
| 3995 | |
| 3996 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3997 | * Create, destroy, or resize a linear (direct) block of extents. |
| 3998 | */ |
| 3999 | void |
| 4000 | xfs_iext_realloc_direct( |
| 4001 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4002 | int new_size) /* new size of extents */ |
| 4003 | { |
| 4004 | int rnew_size; /* real new size of extents */ |
| 4005 | |
| 4006 | rnew_size = new_size; |
| 4007 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4008 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC) || |
| 4009 | ((new_size >= 0) && (new_size <= XFS_IEXT_BUFSZ) && |
| 4010 | (new_size != ifp->if_real_bytes))); |
| 4011 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4012 | /* Free extent records */ |
| 4013 | if (new_size == 0) { |
| 4014 | xfs_iext_destroy(ifp); |
| 4015 | } |
| 4016 | /* Resize direct extent list and zero any new bytes */ |
| 4017 | else if (ifp->if_real_bytes) { |
| 4018 | /* Check if extents will fit inside the inode */ |
| 4019 | if (new_size <= XFS_INLINE_EXTS * sizeof(xfs_bmbt_rec_t)) { |
| 4020 | xfs_iext_direct_to_inline(ifp, new_size / |
| 4021 | (uint)sizeof(xfs_bmbt_rec_t)); |
| 4022 | ifp->if_bytes = new_size; |
| 4023 | return; |
| 4024 | } |
Vignesh Babu | 16a087d | 2007-06-28 16:46:37 +1000 | [diff] [blame] | 4025 | if (!is_power_of_2(new_size)){ |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 4026 | rnew_size = roundup_pow_of_two(new_size); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4027 | } |
| 4028 | if (rnew_size != ifp->if_real_bytes) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 4029 | ifp->if_u1.if_extents = |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4030 | kmem_realloc(ifp->if_u1.if_extents, |
| 4031 | rnew_size, |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4032 | ifp->if_real_bytes, KM_NOFS); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4033 | } |
| 4034 | if (rnew_size > ifp->if_real_bytes) { |
| 4035 | memset(&ifp->if_u1.if_extents[ifp->if_bytes / |
| 4036 | (uint)sizeof(xfs_bmbt_rec_t)], 0, |
| 4037 | rnew_size - ifp->if_real_bytes); |
| 4038 | } |
| 4039 | } |
| 4040 | /* |
| 4041 | * Switch from the inline extent buffer to a direct |
| 4042 | * extent list. Be sure to include the inline extent |
| 4043 | * bytes in new_size. |
| 4044 | */ |
| 4045 | else { |
| 4046 | new_size += ifp->if_bytes; |
Vignesh Babu | 16a087d | 2007-06-28 16:46:37 +1000 | [diff] [blame] | 4047 | if (!is_power_of_2(new_size)) { |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 4048 | rnew_size = roundup_pow_of_two(new_size); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4049 | } |
| 4050 | xfs_iext_inline_to_direct(ifp, rnew_size); |
| 4051 | } |
| 4052 | ifp->if_real_bytes = rnew_size; |
| 4053 | ifp->if_bytes = new_size; |
| 4054 | } |
| 4055 | |
| 4056 | /* |
| 4057 | * Switch from linear (direct) extent records to inline buffer. |
| 4058 | */ |
| 4059 | void |
| 4060 | xfs_iext_direct_to_inline( |
| 4061 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4062 | xfs_extnum_t nextents) /* number of extents in file */ |
| 4063 | { |
| 4064 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| 4065 | ASSERT(nextents <= XFS_INLINE_EXTS); |
| 4066 | /* |
| 4067 | * The inline buffer was zeroed when we switched |
| 4068 | * from inline to direct extent allocation mode, |
| 4069 | * so we don't need to clear it here. |
| 4070 | */ |
| 4071 | memcpy(ifp->if_u2.if_inline_ext, ifp->if_u1.if_extents, |
| 4072 | nextents * sizeof(xfs_bmbt_rec_t)); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4073 | kmem_free(ifp->if_u1.if_extents); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4074 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
| 4075 | ifp->if_real_bytes = 0; |
| 4076 | } |
| 4077 | |
| 4078 | /* |
| 4079 | * Switch from inline buffer to linear (direct) extent records. |
| 4080 | * new_size should already be rounded up to the next power of 2 |
| 4081 | * by the caller (when appropriate), so use new_size as it is. |
| 4082 | * However, since new_size may be rounded up, we can't update |
| 4083 | * if_bytes here. It is the caller's responsibility to update |
| 4084 | * if_bytes upon return. |
| 4085 | */ |
| 4086 | void |
| 4087 | xfs_iext_inline_to_direct( |
| 4088 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4089 | int new_size) /* number of extents in file */ |
| 4090 | { |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4091 | ifp->if_u1.if_extents = kmem_alloc(new_size, KM_NOFS); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4092 | memset(ifp->if_u1.if_extents, 0, new_size); |
| 4093 | if (ifp->if_bytes) { |
| 4094 | memcpy(ifp->if_u1.if_extents, ifp->if_u2.if_inline_ext, |
| 4095 | ifp->if_bytes); |
| 4096 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * |
| 4097 | sizeof(xfs_bmbt_rec_t)); |
| 4098 | } |
| 4099 | ifp->if_real_bytes = new_size; |
| 4100 | } |
| 4101 | |
| 4102 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4103 | * Resize an extent indirection array to new_size bytes. |
| 4104 | */ |
| 4105 | void |
| 4106 | xfs_iext_realloc_indirect( |
| 4107 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4108 | int new_size) /* new indirection array size */ |
| 4109 | { |
| 4110 | int nlists; /* number of irec's (ex lists) */ |
| 4111 | int size; /* current indirection array size */ |
| 4112 | |
| 4113 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4114 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4115 | size = nlists * sizeof(xfs_ext_irec_t); |
| 4116 | ASSERT(ifp->if_real_bytes); |
| 4117 | ASSERT((new_size >= 0) && (new_size != size)); |
| 4118 | if (new_size == 0) { |
| 4119 | xfs_iext_destroy(ifp); |
| 4120 | } else { |
| 4121 | ifp->if_u1.if_ext_irec = (xfs_ext_irec_t *) |
| 4122 | kmem_realloc(ifp->if_u1.if_ext_irec, |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4123 | new_size, size, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4124 | } |
| 4125 | } |
| 4126 | |
| 4127 | /* |
| 4128 | * Switch from indirection array to linear (direct) extent allocations. |
| 4129 | */ |
| 4130 | void |
| 4131 | xfs_iext_indirect_to_direct( |
| 4132 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4133 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 4134 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4135 | xfs_extnum_t nextents; /* number of extents in file */ |
| 4136 | int size; /* size of file extents */ |
| 4137 | |
| 4138 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4139 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 4140 | ASSERT(nextents <= XFS_LINEAR_EXTS); |
| 4141 | size = nextents * sizeof(xfs_bmbt_rec_t); |
| 4142 | |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 4143 | xfs_iext_irec_compact_pages(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4144 | ASSERT(ifp->if_real_bytes == XFS_IEXT_BUFSZ); |
| 4145 | |
| 4146 | ep = ifp->if_u1.if_ext_irec->er_extbuf; |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4147 | kmem_free(ifp->if_u1.if_ext_irec); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4148 | ifp->if_flags &= ~XFS_IFEXTIREC; |
| 4149 | ifp->if_u1.if_extents = ep; |
| 4150 | ifp->if_bytes = size; |
| 4151 | if (nextents < XFS_LINEAR_EXTS) { |
| 4152 | xfs_iext_realloc_direct(ifp, size); |
| 4153 | } |
| 4154 | } |
| 4155 | |
| 4156 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4157 | * Free incore file extents. |
| 4158 | */ |
| 4159 | void |
| 4160 | xfs_iext_destroy( |
| 4161 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4162 | { |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4163 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 4164 | int erp_idx; |
| 4165 | int nlists; |
| 4166 | |
| 4167 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4168 | for (erp_idx = nlists - 1; erp_idx >= 0 ; erp_idx--) { |
| 4169 | xfs_iext_irec_remove(ifp, erp_idx); |
| 4170 | } |
| 4171 | ifp->if_flags &= ~XFS_IFEXTIREC; |
| 4172 | } else if (ifp->if_real_bytes) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4173 | kmem_free(ifp->if_u1.if_extents); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 4174 | } else if (ifp->if_bytes) { |
| 4175 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * |
| 4176 | sizeof(xfs_bmbt_rec_t)); |
| 4177 | } |
| 4178 | ifp->if_u1.if_extents = NULL; |
| 4179 | ifp->if_real_bytes = 0; |
| 4180 | ifp->if_bytes = 0; |
| 4181 | } |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4182 | |
| 4183 | /* |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4184 | * Return a pointer to the extent record for file system block bno. |
| 4185 | */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 4186 | xfs_bmbt_rec_host_t * /* pointer to found extent record */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4187 | xfs_iext_bno_to_ext( |
| 4188 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4189 | xfs_fileoff_t bno, /* block number to search for */ |
| 4190 | xfs_extnum_t *idxp) /* index of target extent */ |
| 4191 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 4192 | xfs_bmbt_rec_host_t *base; /* pointer to first extent */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4193 | xfs_filblks_t blockcount = 0; /* number of blocks in extent */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 4194 | xfs_bmbt_rec_host_t *ep = NULL; /* pointer to target extent */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4195 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 4196 | int high; /* upper boundary in search */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4197 | xfs_extnum_t idx = 0; /* index of target extent */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 4198 | int low; /* lower boundary in search */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4199 | xfs_extnum_t nextents; /* number of file extents */ |
| 4200 | xfs_fileoff_t startoff = 0; /* start offset of extent */ |
| 4201 | |
| 4202 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 4203 | if (nextents == 0) { |
| 4204 | *idxp = 0; |
| 4205 | return NULL; |
| 4206 | } |
| 4207 | low = 0; |
| 4208 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 4209 | /* Find target extent list */ |
| 4210 | int erp_idx = 0; |
| 4211 | erp = xfs_iext_bno_to_irec(ifp, bno, &erp_idx); |
| 4212 | base = erp->er_extbuf; |
| 4213 | high = erp->er_extcount - 1; |
| 4214 | } else { |
| 4215 | base = ifp->if_u1.if_extents; |
| 4216 | high = nextents - 1; |
| 4217 | } |
| 4218 | /* Binary search extent records */ |
| 4219 | while (low <= high) { |
| 4220 | idx = (low + high) >> 1; |
| 4221 | ep = base + idx; |
| 4222 | startoff = xfs_bmbt_get_startoff(ep); |
| 4223 | blockcount = xfs_bmbt_get_blockcount(ep); |
| 4224 | if (bno < startoff) { |
| 4225 | high = idx - 1; |
| 4226 | } else if (bno >= startoff + blockcount) { |
| 4227 | low = idx + 1; |
| 4228 | } else { |
| 4229 | /* Convert back to file-based extent index */ |
| 4230 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 4231 | idx += erp->er_extoff; |
| 4232 | } |
| 4233 | *idxp = idx; |
| 4234 | return ep; |
| 4235 | } |
| 4236 | } |
| 4237 | /* Convert back to file-based extent index */ |
| 4238 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 4239 | idx += erp->er_extoff; |
| 4240 | } |
| 4241 | if (bno >= startoff + blockcount) { |
| 4242 | if (++idx == nextents) { |
| 4243 | ep = NULL; |
| 4244 | } else { |
| 4245 | ep = xfs_iext_get_ext(ifp, idx); |
| 4246 | } |
| 4247 | } |
| 4248 | *idxp = idx; |
| 4249 | return ep; |
| 4250 | } |
| 4251 | |
| 4252 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4253 | * Return a pointer to the indirection array entry containing the |
| 4254 | * extent record for filesystem block bno. Store the index of the |
| 4255 | * target irec in *erp_idxp. |
| 4256 | */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4257 | xfs_ext_irec_t * /* pointer to found extent record */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4258 | xfs_iext_bno_to_irec( |
| 4259 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4260 | xfs_fileoff_t bno, /* block number to search for */ |
| 4261 | int *erp_idxp) /* irec index of target ext list */ |
| 4262 | { |
| 4263 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ |
| 4264 | xfs_ext_irec_t *erp_next; /* next indirection array entry */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 4265 | int erp_idx; /* indirection array index */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4266 | int nlists; /* number of extent irec's (lists) */ |
| 4267 | int high; /* binary search upper limit */ |
| 4268 | int low; /* binary search lower limit */ |
| 4269 | |
| 4270 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4271 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4272 | erp_idx = 0; |
| 4273 | low = 0; |
| 4274 | high = nlists - 1; |
| 4275 | while (low <= high) { |
| 4276 | erp_idx = (low + high) >> 1; |
| 4277 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4278 | erp_next = erp_idx < nlists - 1 ? erp + 1 : NULL; |
| 4279 | if (bno < xfs_bmbt_get_startoff(erp->er_extbuf)) { |
| 4280 | high = erp_idx - 1; |
| 4281 | } else if (erp_next && bno >= |
| 4282 | xfs_bmbt_get_startoff(erp_next->er_extbuf)) { |
| 4283 | low = erp_idx + 1; |
| 4284 | } else { |
| 4285 | break; |
| 4286 | } |
| 4287 | } |
| 4288 | *erp_idxp = erp_idx; |
| 4289 | return erp; |
| 4290 | } |
| 4291 | |
| 4292 | /* |
| 4293 | * Return a pointer to the indirection array entry containing the |
| 4294 | * extent record at file extent index *idxp. Store the index of the |
| 4295 | * target irec in *erp_idxp and store the page index of the target |
| 4296 | * extent record in *idxp. |
| 4297 | */ |
| 4298 | xfs_ext_irec_t * |
| 4299 | xfs_iext_idx_to_irec( |
| 4300 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4301 | xfs_extnum_t *idxp, /* extent index (file -> page) */ |
| 4302 | int *erp_idxp, /* pointer to target irec */ |
| 4303 | int realloc) /* new bytes were just added */ |
| 4304 | { |
| 4305 | xfs_ext_irec_t *prev; /* pointer to previous irec */ |
| 4306 | xfs_ext_irec_t *erp = NULL; /* pointer to current irec */ |
| 4307 | int erp_idx; /* indirection array index */ |
| 4308 | int nlists; /* number of irec's (ex lists) */ |
| 4309 | int high; /* binary search upper limit */ |
| 4310 | int low; /* binary search lower limit */ |
| 4311 | xfs_extnum_t page_idx = *idxp; /* extent index in target list */ |
| 4312 | |
| 4313 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4314 | ASSERT(page_idx >= 0 && page_idx <= |
| 4315 | ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)); |
| 4316 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4317 | erp_idx = 0; |
| 4318 | low = 0; |
| 4319 | high = nlists - 1; |
| 4320 | |
| 4321 | /* Binary search extent irec's */ |
| 4322 | while (low <= high) { |
| 4323 | erp_idx = (low + high) >> 1; |
| 4324 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4325 | prev = erp_idx > 0 ? erp - 1 : NULL; |
| 4326 | if (page_idx < erp->er_extoff || (page_idx == erp->er_extoff && |
| 4327 | realloc && prev && prev->er_extcount < XFS_LINEAR_EXTS)) { |
| 4328 | high = erp_idx - 1; |
| 4329 | } else if (page_idx > erp->er_extoff + erp->er_extcount || |
| 4330 | (page_idx == erp->er_extoff + erp->er_extcount && |
| 4331 | !realloc)) { |
| 4332 | low = erp_idx + 1; |
| 4333 | } else if (page_idx == erp->er_extoff + erp->er_extcount && |
| 4334 | erp->er_extcount == XFS_LINEAR_EXTS) { |
| 4335 | ASSERT(realloc); |
| 4336 | page_idx = 0; |
| 4337 | erp_idx++; |
| 4338 | erp = erp_idx < nlists ? erp + 1 : NULL; |
| 4339 | break; |
| 4340 | } else { |
| 4341 | page_idx -= erp->er_extoff; |
| 4342 | break; |
| 4343 | } |
| 4344 | } |
| 4345 | *idxp = page_idx; |
| 4346 | *erp_idxp = erp_idx; |
| 4347 | return(erp); |
| 4348 | } |
| 4349 | |
| 4350 | /* |
| 4351 | * Allocate and initialize an indirection array once the space needed |
| 4352 | * for incore extents increases above XFS_IEXT_BUFSZ. |
| 4353 | */ |
| 4354 | void |
| 4355 | xfs_iext_irec_init( |
| 4356 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4357 | { |
| 4358 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 4359 | xfs_extnum_t nextents; /* number of extents in file */ |
| 4360 | |
| 4361 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
| 4362 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 4363 | ASSERT(nextents <= XFS_LINEAR_EXTS); |
| 4364 | |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4365 | erp = kmem_alloc(sizeof(xfs_ext_irec_t), KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4366 | |
| 4367 | if (nextents == 0) { |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4368 | ifp->if_u1.if_extents = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4369 | } else if (!ifp->if_real_bytes) { |
| 4370 | xfs_iext_inline_to_direct(ifp, XFS_IEXT_BUFSZ); |
| 4371 | } else if (ifp->if_real_bytes < XFS_IEXT_BUFSZ) { |
| 4372 | xfs_iext_realloc_direct(ifp, XFS_IEXT_BUFSZ); |
| 4373 | } |
| 4374 | erp->er_extbuf = ifp->if_u1.if_extents; |
| 4375 | erp->er_extcount = nextents; |
| 4376 | erp->er_extoff = 0; |
| 4377 | |
| 4378 | ifp->if_flags |= XFS_IFEXTIREC; |
| 4379 | ifp->if_real_bytes = XFS_IEXT_BUFSZ; |
| 4380 | ifp->if_bytes = nextents * sizeof(xfs_bmbt_rec_t); |
| 4381 | ifp->if_u1.if_ext_irec = erp; |
| 4382 | |
| 4383 | return; |
| 4384 | } |
| 4385 | |
| 4386 | /* |
| 4387 | * Allocate and initialize a new entry in the indirection array. |
| 4388 | */ |
| 4389 | xfs_ext_irec_t * |
| 4390 | xfs_iext_irec_new( |
| 4391 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4392 | int erp_idx) /* index for new irec */ |
| 4393 | { |
| 4394 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 4395 | int i; /* loop counter */ |
| 4396 | int nlists; /* number of irec's (ex lists) */ |
| 4397 | |
| 4398 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4399 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4400 | |
| 4401 | /* Resize indirection array */ |
| 4402 | xfs_iext_realloc_indirect(ifp, ++nlists * |
| 4403 | sizeof(xfs_ext_irec_t)); |
| 4404 | /* |
| 4405 | * Move records down in the array so the |
| 4406 | * new page can use erp_idx. |
| 4407 | */ |
| 4408 | erp = ifp->if_u1.if_ext_irec; |
| 4409 | for (i = nlists - 1; i > erp_idx; i--) { |
| 4410 | memmove(&erp[i], &erp[i-1], sizeof(xfs_ext_irec_t)); |
| 4411 | } |
| 4412 | ASSERT(i == erp_idx); |
| 4413 | |
| 4414 | /* Initialize new extent record */ |
| 4415 | erp = ifp->if_u1.if_ext_irec; |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 4416 | erp[erp_idx].er_extbuf = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4417 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; |
| 4418 | memset(erp[erp_idx].er_extbuf, 0, XFS_IEXT_BUFSZ); |
| 4419 | erp[erp_idx].er_extcount = 0; |
| 4420 | erp[erp_idx].er_extoff = erp_idx > 0 ? |
| 4421 | erp[erp_idx-1].er_extoff + erp[erp_idx-1].er_extcount : 0; |
| 4422 | return (&erp[erp_idx]); |
| 4423 | } |
| 4424 | |
| 4425 | /* |
| 4426 | * Remove a record from the indirection array. |
| 4427 | */ |
| 4428 | void |
| 4429 | xfs_iext_irec_remove( |
| 4430 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4431 | int erp_idx) /* irec index to remove */ |
| 4432 | { |
| 4433 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 4434 | int i; /* loop counter */ |
| 4435 | int nlists; /* number of irec's (ex lists) */ |
| 4436 | |
| 4437 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4438 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4439 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4440 | if (erp->er_extbuf) { |
| 4441 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, |
| 4442 | -erp->er_extcount); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4443 | kmem_free(erp->er_extbuf); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4444 | } |
| 4445 | /* Compact extent records */ |
| 4446 | erp = ifp->if_u1.if_ext_irec; |
| 4447 | for (i = erp_idx; i < nlists - 1; i++) { |
| 4448 | memmove(&erp[i], &erp[i+1], sizeof(xfs_ext_irec_t)); |
| 4449 | } |
| 4450 | /* |
| 4451 | * Manually free the last extent record from the indirection |
| 4452 | * array. A call to xfs_iext_realloc_indirect() with a size |
| 4453 | * of zero would result in a call to xfs_iext_destroy() which |
| 4454 | * would in turn call this function again, creating a nasty |
| 4455 | * infinite loop. |
| 4456 | */ |
| 4457 | if (--nlists) { |
| 4458 | xfs_iext_realloc_indirect(ifp, |
| 4459 | nlists * sizeof(xfs_ext_irec_t)); |
| 4460 | } else { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4461 | kmem_free(ifp->if_u1.if_ext_irec); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4462 | } |
| 4463 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; |
| 4464 | } |
| 4465 | |
| 4466 | /* |
| 4467 | * This is called to clean up large amounts of unused memory allocated |
| 4468 | * by the indirection array. Before compacting anything though, verify |
| 4469 | * that the indirection array is still needed and switch back to the |
| 4470 | * linear extent list (or even the inline buffer) if possible. The |
| 4471 | * compaction policy is as follows: |
| 4472 | * |
| 4473 | * Full Compaction: Extents fit into a single page (or inline buffer) |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 4474 | * Partial Compaction: Extents occupy less than 50% of allocated space |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4475 | * No Compaction: Extents occupy at least 50% of allocated space |
| 4476 | */ |
| 4477 | void |
| 4478 | xfs_iext_irec_compact( |
| 4479 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4480 | { |
| 4481 | xfs_extnum_t nextents; /* number of extents in file */ |
| 4482 | int nlists; /* number of irec's (ex lists) */ |
| 4483 | |
| 4484 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4485 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4486 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 4487 | |
| 4488 | if (nextents == 0) { |
| 4489 | xfs_iext_destroy(ifp); |
| 4490 | } else if (nextents <= XFS_INLINE_EXTS) { |
| 4491 | xfs_iext_indirect_to_direct(ifp); |
| 4492 | xfs_iext_direct_to_inline(ifp, nextents); |
| 4493 | } else if (nextents <= XFS_LINEAR_EXTS) { |
| 4494 | xfs_iext_indirect_to_direct(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4495 | } else if (nextents < (nlists * XFS_LINEAR_EXTS) >> 1) { |
| 4496 | xfs_iext_irec_compact_pages(ifp); |
| 4497 | } |
| 4498 | } |
| 4499 | |
| 4500 | /* |
| 4501 | * Combine extents from neighboring extent pages. |
| 4502 | */ |
| 4503 | void |
| 4504 | xfs_iext_irec_compact_pages( |
| 4505 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4506 | { |
| 4507 | xfs_ext_irec_t *erp, *erp_next;/* pointers to irec entries */ |
| 4508 | int erp_idx = 0; /* indirection array index */ |
| 4509 | int nlists; /* number of irec's (ex lists) */ |
| 4510 | |
| 4511 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4512 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4513 | while (erp_idx < nlists - 1) { |
| 4514 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4515 | erp_next = erp + 1; |
| 4516 | if (erp_next->er_extcount <= |
| 4517 | (XFS_LINEAR_EXTS - erp->er_extcount)) { |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 4518 | memcpy(&erp->er_extbuf[erp->er_extcount], |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4519 | erp_next->er_extbuf, erp_next->er_extcount * |
| 4520 | sizeof(xfs_bmbt_rec_t)); |
| 4521 | erp->er_extcount += erp_next->er_extcount; |
| 4522 | /* |
| 4523 | * Free page before removing extent record |
| 4524 | * so er_extoffs don't get modified in |
| 4525 | * xfs_iext_irec_remove. |
| 4526 | */ |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4527 | kmem_free(erp_next->er_extbuf); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4528 | erp_next->er_extbuf = NULL; |
| 4529 | xfs_iext_irec_remove(ifp, erp_idx + 1); |
| 4530 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4531 | } else { |
| 4532 | erp_idx++; |
| 4533 | } |
| 4534 | } |
| 4535 | } |
| 4536 | |
| 4537 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4538 | * This is called to update the er_extoff field in the indirection |
| 4539 | * array when extents have been added or removed from one of the |
| 4540 | * extent lists. erp_idx contains the irec index to begin updating |
| 4541 | * at and ext_diff contains the number of extents that were added |
| 4542 | * or removed. |
| 4543 | */ |
| 4544 | void |
| 4545 | xfs_iext_irec_update_extoffs( |
| 4546 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4547 | int erp_idx, /* irec index to update */ |
| 4548 | int ext_diff) /* number of new extents */ |
| 4549 | { |
| 4550 | int i; /* loop counter */ |
| 4551 | int nlists; /* number of irec's (ex lists */ |
| 4552 | |
| 4553 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4554 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4555 | for (i = erp_idx; i < nlists; i++) { |
| 4556 | ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff; |
| 4557 | } |
| 4558 | } |