Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 3 | * Copyright (c) 2012 Red Hat, Inc. |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it would be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | #include "xfs.h" |
| 20 | #include "xfs_fs.h" |
Dave Chinner | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 21 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_format.h" |
| 23 | #include "xfs_log_format.h" |
| 24 | #include "xfs_trans_resv.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 25 | #include "xfs_bit.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 26 | #include "xfs_mount.h" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 27 | #include "xfs_da_format.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 28 | #include "xfs_inode.h" |
| 29 | #include "xfs_btree.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 30 | #include "xfs_trans.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 31 | #include "xfs_extfree_item.h" |
| 32 | #include "xfs_alloc.h" |
| 33 | #include "xfs_bmap.h" |
| 34 | #include "xfs_bmap_util.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 35 | #include "xfs_bmap_btree.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 36 | #include "xfs_rtalloc.h" |
| 37 | #include "xfs_error.h" |
| 38 | #include "xfs_quota.h" |
| 39 | #include "xfs_trans_space.h" |
| 40 | #include "xfs_trace.h" |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 41 | #include "xfs_icache.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 42 | #include "xfs_log.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 43 | |
| 44 | /* Kernel only BMAP related definitions and functions */ |
| 45 | |
| 46 | /* |
| 47 | * Convert the given file system block to a disk block. We have to treat it |
| 48 | * differently based on whether the file is a real time file or not, because the |
| 49 | * bmap code does. |
| 50 | */ |
| 51 | xfs_daddr_t |
| 52 | xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb) |
| 53 | { |
| 54 | return (XFS_IS_REALTIME_INODE(ip) ? \ |
| 55 | (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \ |
| 56 | XFS_FSB_TO_DADDR((ip)->i_mount, (fsb))); |
| 57 | } |
| 58 | |
| 59 | /* |
Dave Chinner | 3fbbbea | 2015-11-03 12:27:22 +1100 | [diff] [blame] | 60 | * Routine to zero an extent on disk allocated to the specific inode. |
| 61 | * |
| 62 | * The VFS functions take a linearised filesystem block offset, so we have to |
| 63 | * convert the sparse xfs fsb to the right format first. |
| 64 | * VFS types are real funky, too. |
| 65 | */ |
| 66 | int |
| 67 | xfs_zero_extent( |
| 68 | struct xfs_inode *ip, |
| 69 | xfs_fsblock_t start_fsb, |
| 70 | xfs_off_t count_fsb) |
| 71 | { |
| 72 | struct xfs_mount *mp = ip->i_mount; |
| 73 | xfs_daddr_t sector = xfs_fsb_to_db(ip, start_fsb); |
| 74 | sector_t block = XFS_BB_TO_FSBT(mp, sector); |
| 75 | ssize_t size = XFS_FSB_TO_B(mp, count_fsb); |
| 76 | |
| 77 | if (IS_DAX(VFS_I(ip))) |
Ross Zwisler | 20a90f5 | 2016-02-26 15:19:52 -0800 | [diff] [blame^] | 78 | return dax_clear_sectors(xfs_find_bdev_for_inode(VFS_I(ip)), |
| 79 | sector, size); |
Dave Chinner | 3fbbbea | 2015-11-03 12:27:22 +1100 | [diff] [blame] | 80 | |
| 81 | /* |
| 82 | * let the block layer decide on the fastest method of |
| 83 | * implementing the zeroing. |
| 84 | */ |
| 85 | return sb_issue_zeroout(mp->m_super, block, count_fsb, GFP_NOFS); |
| 86 | |
| 87 | } |
| 88 | |
| 89 | /* |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 90 | * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi |
| 91 | * caller. Frees all the extents that need freeing, which must be done |
| 92 | * last due to locking considerations. We never free any extents in |
| 93 | * the first transaction. |
| 94 | * |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 95 | * If an inode *ip is provided, rejoin it to the transaction if |
| 96 | * the transaction was committed. |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 97 | */ |
| 98 | int /* error */ |
| 99 | xfs_bmap_finish( |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 100 | struct xfs_trans **tp, /* transaction pointer addr */ |
| 101 | struct xfs_bmap_free *flist, /* i/o: list extents to free */ |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 102 | struct xfs_inode *ip) |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 103 | { |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 104 | struct xfs_efd_log_item *efd; /* extent free data */ |
| 105 | struct xfs_efi_log_item *efi; /* extent free intention */ |
| 106 | int error; /* error return value */ |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 107 | int committed;/* xact committed or not */ |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 108 | struct xfs_bmap_free_item *free; /* free extent item */ |
| 109 | struct xfs_bmap_free_item *next; /* next item on free list */ |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 110 | |
| 111 | ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 112 | if (flist->xbf_count == 0) |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 113 | return 0; |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 114 | |
Christoph Hellwig | 2e6db6c | 2015-06-04 13:47:29 +1000 | [diff] [blame] | 115 | efi = xfs_trans_get_efi(*tp, flist->xbf_count); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 116 | for (free = flist->xbf_first; free; free = free->xbfi_next) |
Christoph Hellwig | 2e6db6c | 2015-06-04 13:47:29 +1000 | [diff] [blame] | 117 | xfs_trans_log_efi_extent(*tp, efi, free->xbfi_startblock, |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 118 | free->xbfi_blockcount); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 119 | |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 120 | error = __xfs_trans_roll(tp, ip, &committed); |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 121 | if (error) { |
| 122 | /* |
| 123 | * If the transaction was committed, drop the EFD reference |
| 124 | * since we're bailing out of here. The other reference is |
| 125 | * dropped when the EFI hits the AIL. |
| 126 | * |
| 127 | * If the transaction was not committed, the EFI is freed by the |
| 128 | * EFI item unlock handler on abort. Also, we have a new |
| 129 | * transaction so we should return committed=1 even though we're |
| 130 | * returning an error. |
| 131 | */ |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 132 | if (committed) { |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 133 | xfs_efi_release(efi); |
| 134 | xfs_force_shutdown((*tp)->t_mountp, |
| 135 | (error == -EFSCORRUPTED) ? |
| 136 | SHUTDOWN_CORRUPT_INCORE : |
| 137 | SHUTDOWN_META_IO_ERROR); |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 138 | } |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 139 | return error; |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 140 | } |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 141 | |
Brian Foster | 6bc43af | 2015-08-19 09:51:43 +1000 | [diff] [blame] | 142 | /* |
| 143 | * Get an EFD and free each extent in the list, logging to the EFD in |
| 144 | * the process. The remaining bmap free list is cleaned up by the caller |
| 145 | * on error. |
| 146 | */ |
Christoph Hellwig | 2e6db6c | 2015-06-04 13:47:29 +1000 | [diff] [blame] | 147 | efd = xfs_trans_get_efd(*tp, efi, flist->xbf_count); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 148 | for (free = flist->xbf_first; free != NULL; free = next) { |
| 149 | next = free->xbfi_next; |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 150 | |
Brian Foster | 6bc43af | 2015-08-19 09:51:43 +1000 | [diff] [blame] | 151 | error = xfs_trans_free_extent(*tp, efd, free->xbfi_startblock, |
| 152 | free->xbfi_blockcount); |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 153 | if (error) |
| 154 | return error; |
| 155 | |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 156 | xfs_bmap_del_free(flist, NULL, free); |
| 157 | } |
Brian Foster | 8d99fe9 | 2015-08-19 09:51:16 +1000 | [diff] [blame] | 158 | |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | int |
| 163 | xfs_bmap_rtalloc( |
| 164 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
| 165 | { |
| 166 | xfs_alloctype_t atype = 0; /* type for allocation routines */ |
| 167 | int error; /* error return value */ |
| 168 | xfs_mount_t *mp; /* mount point structure */ |
| 169 | xfs_extlen_t prod = 0; /* product factor for allocators */ |
| 170 | xfs_extlen_t ralen = 0; /* realtime allocation length */ |
| 171 | xfs_extlen_t align; /* minimum allocation alignment */ |
| 172 | xfs_rtblock_t rtb; |
| 173 | |
| 174 | mp = ap->ip->i_mount; |
| 175 | align = xfs_get_extsz_hint(ap->ip); |
| 176 | prod = align / mp->m_sb.sb_rextsize; |
| 177 | error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, |
| 178 | align, 1, ap->eof, 0, |
| 179 | ap->conv, &ap->offset, &ap->length); |
| 180 | if (error) |
| 181 | return error; |
| 182 | ASSERT(ap->length); |
| 183 | ASSERT(ap->length % mp->m_sb.sb_rextsize == 0); |
| 184 | |
| 185 | /* |
| 186 | * If the offset & length are not perfectly aligned |
| 187 | * then kill prod, it will just get us in trouble. |
| 188 | */ |
| 189 | if (do_mod(ap->offset, align) || ap->length % align) |
| 190 | prod = 1; |
| 191 | /* |
| 192 | * Set ralen to be the actual requested length in rtextents. |
| 193 | */ |
| 194 | ralen = ap->length / mp->m_sb.sb_rextsize; |
| 195 | /* |
| 196 | * If the old value was close enough to MAXEXTLEN that |
| 197 | * we rounded up to it, cut it back so it's valid again. |
| 198 | * Note that if it's a really large request (bigger than |
| 199 | * MAXEXTLEN), we don't hear about that number, and can't |
| 200 | * adjust the starting point to match it. |
| 201 | */ |
| 202 | if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN) |
| 203 | ralen = MAXEXTLEN / mp->m_sb.sb_rextsize; |
| 204 | |
| 205 | /* |
| 206 | * Lock out other modifications to the RT bitmap inode. |
| 207 | */ |
| 208 | xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); |
| 209 | xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL); |
| 210 | |
| 211 | /* |
| 212 | * If it's an allocation to an empty file at offset 0, |
| 213 | * pick an extent that will space things out in the rt area. |
| 214 | */ |
| 215 | if (ap->eof && ap->offset == 0) { |
| 216 | xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */ |
| 217 | |
| 218 | error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx); |
| 219 | if (error) |
| 220 | return error; |
| 221 | ap->blkno = rtx * mp->m_sb.sb_rextsize; |
| 222 | } else { |
| 223 | ap->blkno = 0; |
| 224 | } |
| 225 | |
| 226 | xfs_bmap_adjacent(ap); |
| 227 | |
| 228 | /* |
| 229 | * Realtime allocation, done through xfs_rtallocate_extent. |
| 230 | */ |
| 231 | atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO; |
| 232 | do_div(ap->blkno, mp->m_sb.sb_rextsize); |
| 233 | rtb = ap->blkno; |
| 234 | ap->length = ralen; |
| 235 | if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length, |
| 236 | &ralen, atype, ap->wasdel, prod, &rtb))) |
| 237 | return error; |
| 238 | if (rtb == NULLFSBLOCK && prod > 1 && |
| 239 | (error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, |
| 240 | ap->length, &ralen, atype, |
| 241 | ap->wasdel, 1, &rtb))) |
| 242 | return error; |
| 243 | ap->blkno = rtb; |
| 244 | if (ap->blkno != NULLFSBLOCK) { |
| 245 | ap->blkno *= mp->m_sb.sb_rextsize; |
| 246 | ralen *= mp->m_sb.sb_rextsize; |
| 247 | ap->length = ralen; |
| 248 | ap->ip->i_d.di_nblocks += ralen; |
| 249 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); |
| 250 | if (ap->wasdel) |
| 251 | ap->ip->i_delayed_blks -= ralen; |
| 252 | /* |
| 253 | * Adjust the disk quota also. This was reserved |
| 254 | * earlier. |
| 255 | */ |
| 256 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, |
| 257 | ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT : |
| 258 | XFS_TRANS_DQ_RTBCOUNT, (long) ralen); |
Dave Chinner | 3fbbbea | 2015-11-03 12:27:22 +1100 | [diff] [blame] | 259 | |
| 260 | /* Zero the extent if we were asked to do so */ |
| 261 | if (ap->userdata & XFS_ALLOC_USERDATA_ZERO) { |
| 262 | error = xfs_zero_extent(ap->ip, ap->blkno, ap->length); |
| 263 | if (error) |
| 264 | return error; |
| 265 | } |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 266 | } else { |
| 267 | ap->length = 0; |
| 268 | } |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | /* |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 273 | * Check if the endoff is outside the last extent. If so the caller will grow |
| 274 | * the allocation to a stripe unit boundary. All offsets are considered outside |
| 275 | * the end of file for an empty fork, so 1 is returned in *eof in that case. |
| 276 | */ |
| 277 | int |
| 278 | xfs_bmap_eof( |
| 279 | struct xfs_inode *ip, |
| 280 | xfs_fileoff_t endoff, |
| 281 | int whichfork, |
| 282 | int *eof) |
| 283 | { |
| 284 | struct xfs_bmbt_irec rec; |
| 285 | int error; |
| 286 | |
| 287 | error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, eof); |
| 288 | if (error || *eof) |
| 289 | return error; |
| 290 | |
| 291 | *eof = endoff >= rec.br_startoff + rec.br_blockcount; |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * Extent tree block counting routines. |
| 297 | */ |
| 298 | |
| 299 | /* |
| 300 | * Count leaf blocks given a range of extent records. |
| 301 | */ |
| 302 | STATIC void |
| 303 | xfs_bmap_count_leaves( |
| 304 | xfs_ifork_t *ifp, |
| 305 | xfs_extnum_t idx, |
| 306 | int numrecs, |
| 307 | int *count) |
| 308 | { |
| 309 | int b; |
| 310 | |
| 311 | for (b = 0; b < numrecs; b++) { |
| 312 | xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b); |
| 313 | *count += xfs_bmbt_get_blockcount(frp); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Count leaf blocks given a range of extent records originally |
| 319 | * in btree format. |
| 320 | */ |
| 321 | STATIC void |
| 322 | xfs_bmap_disk_count_leaves( |
| 323 | struct xfs_mount *mp, |
| 324 | struct xfs_btree_block *block, |
| 325 | int numrecs, |
| 326 | int *count) |
| 327 | { |
| 328 | int b; |
| 329 | xfs_bmbt_rec_t *frp; |
| 330 | |
| 331 | for (b = 1; b <= numrecs; b++) { |
| 332 | frp = XFS_BMBT_REC_ADDR(mp, block, b); |
| 333 | *count += xfs_bmbt_disk_get_blockcount(frp); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * Recursively walks each level of a btree |
Zhi Yong Wu | 8be11e9 | 2013-08-12 03:14:52 +0000 | [diff] [blame] | 339 | * to count total fsblocks in use. |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 340 | */ |
| 341 | STATIC int /* error */ |
| 342 | xfs_bmap_count_tree( |
| 343 | xfs_mount_t *mp, /* file system mount point */ |
| 344 | xfs_trans_t *tp, /* transaction pointer */ |
| 345 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 346 | xfs_fsblock_t blockno, /* file system block number */ |
| 347 | int levelin, /* level in btree */ |
| 348 | int *count) /* Count of blocks */ |
| 349 | { |
| 350 | int error; |
| 351 | xfs_buf_t *bp, *nbp; |
| 352 | int level = levelin; |
| 353 | __be64 *pp; |
| 354 | xfs_fsblock_t bno = blockno; |
| 355 | xfs_fsblock_t nextbno; |
| 356 | struct xfs_btree_block *block, *nextblock; |
| 357 | int numrecs; |
| 358 | |
| 359 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF, |
| 360 | &xfs_bmbt_buf_ops); |
| 361 | if (error) |
| 362 | return error; |
| 363 | *count += 1; |
| 364 | block = XFS_BUF_TO_BLOCK(bp); |
| 365 | |
| 366 | if (--level) { |
| 367 | /* Not at node above leaves, count this level of nodes */ |
| 368 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
| 369 | while (nextbno != NULLFSBLOCK) { |
| 370 | error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp, |
| 371 | XFS_BMAP_BTREE_REF, |
| 372 | &xfs_bmbt_buf_ops); |
| 373 | if (error) |
| 374 | return error; |
| 375 | *count += 1; |
| 376 | nextblock = XFS_BUF_TO_BLOCK(nbp); |
| 377 | nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib); |
| 378 | xfs_trans_brelse(tp, nbp); |
| 379 | } |
| 380 | |
| 381 | /* Dive to the next level */ |
| 382 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); |
| 383 | bno = be64_to_cpu(*pp); |
| 384 | if (unlikely((error = |
| 385 | xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) { |
| 386 | xfs_trans_brelse(tp, bp); |
| 387 | XFS_ERROR_REPORT("xfs_bmap_count_tree(1)", |
| 388 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 389 | return -EFSCORRUPTED; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 390 | } |
| 391 | xfs_trans_brelse(tp, bp); |
| 392 | } else { |
| 393 | /* count all level 1 nodes and their leaves */ |
| 394 | for (;;) { |
| 395 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
| 396 | numrecs = be16_to_cpu(block->bb_numrecs); |
| 397 | xfs_bmap_disk_count_leaves(mp, block, numrecs, count); |
| 398 | xfs_trans_brelse(tp, bp); |
| 399 | if (nextbno == NULLFSBLOCK) |
| 400 | break; |
| 401 | bno = nextbno; |
| 402 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, |
| 403 | XFS_BMAP_BTREE_REF, |
| 404 | &xfs_bmbt_buf_ops); |
| 405 | if (error) |
| 406 | return error; |
| 407 | *count += 1; |
| 408 | block = XFS_BUF_TO_BLOCK(bp); |
| 409 | } |
| 410 | } |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Count fsblocks of the given fork. |
| 416 | */ |
| 417 | int /* error */ |
| 418 | xfs_bmap_count_blocks( |
| 419 | xfs_trans_t *tp, /* transaction pointer */ |
| 420 | xfs_inode_t *ip, /* incore inode */ |
| 421 | int whichfork, /* data or attr fork */ |
| 422 | int *count) /* out: count of blocks */ |
| 423 | { |
| 424 | struct xfs_btree_block *block; /* current btree block */ |
| 425 | xfs_fsblock_t bno; /* block # of "block" */ |
| 426 | xfs_ifork_t *ifp; /* fork structure */ |
| 427 | int level; /* btree level, for checking */ |
| 428 | xfs_mount_t *mp; /* file system mount structure */ |
| 429 | __be64 *pp; /* pointer to block address */ |
| 430 | |
| 431 | bno = NULLFSBLOCK; |
| 432 | mp = ip->i_mount; |
| 433 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 434 | if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) { |
| 435 | xfs_bmap_count_leaves(ifp, 0, |
| 436 | ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t), |
| 437 | count); |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
| 443 | */ |
| 444 | block = ifp->if_broot; |
| 445 | level = be16_to_cpu(block->bb_level); |
| 446 | ASSERT(level > 0); |
| 447 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); |
| 448 | bno = be64_to_cpu(*pp); |
Christoph Hellwig | d5cf09b | 2014-07-30 09:12:05 +1000 | [diff] [blame] | 449 | ASSERT(bno != NULLFSBLOCK); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 450 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
| 451 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); |
| 452 | |
| 453 | if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) { |
| 454 | XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW, |
| 455 | mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 456 | return -EFSCORRUPTED; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * returns 1 for success, 0 if we failed to map the extent. |
| 464 | */ |
| 465 | STATIC int |
| 466 | xfs_getbmapx_fix_eof_hole( |
| 467 | xfs_inode_t *ip, /* xfs incore inode pointer */ |
| 468 | struct getbmapx *out, /* output structure */ |
| 469 | int prealloced, /* this is a file with |
| 470 | * preallocated data space */ |
| 471 | __int64_t end, /* last block requested */ |
| 472 | xfs_fsblock_t startblock) |
| 473 | { |
| 474 | __int64_t fixlen; |
| 475 | xfs_mount_t *mp; /* file system mount point */ |
| 476 | xfs_ifork_t *ifp; /* inode fork pointer */ |
| 477 | xfs_extnum_t lastx; /* last extent pointer */ |
| 478 | xfs_fileoff_t fileblock; |
| 479 | |
| 480 | if (startblock == HOLESTARTBLOCK) { |
| 481 | mp = ip->i_mount; |
| 482 | out->bmv_block = -1; |
| 483 | fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, XFS_ISIZE(ip))); |
| 484 | fixlen -= out->bmv_offset; |
| 485 | if (prealloced && out->bmv_offset + out->bmv_length == end) { |
| 486 | /* Came to hole at EOF. Trim it. */ |
| 487 | if (fixlen <= 0) |
| 488 | return 0; |
| 489 | out->bmv_length = fixlen; |
| 490 | } |
| 491 | } else { |
| 492 | if (startblock == DELAYSTARTBLOCK) |
| 493 | out->bmv_block = -2; |
| 494 | else |
| 495 | out->bmv_block = xfs_fsb_to_db(ip, startblock); |
| 496 | fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset); |
| 497 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
| 498 | if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) && |
| 499 | (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1)) |
| 500 | out->bmv_oflags |= BMV_OF_LAST; |
| 501 | } |
| 502 | |
| 503 | return 1; |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Get inode's extents as described in bmv, and format for output. |
| 508 | * Calls formatter to fill the user's buffer until all extents |
| 509 | * are mapped, until the passed-in bmv->bmv_count slots have |
| 510 | * been filled, or until the formatter short-circuits the loop, |
| 511 | * if it is tracking filled-in extents on its own. |
| 512 | */ |
| 513 | int /* error code */ |
| 514 | xfs_getbmap( |
| 515 | xfs_inode_t *ip, |
| 516 | struct getbmapx *bmv, /* user bmap structure */ |
| 517 | xfs_bmap_format_t formatter, /* format to user */ |
| 518 | void *arg) /* formatter arg */ |
| 519 | { |
| 520 | __int64_t bmvend; /* last block requested */ |
| 521 | int error = 0; /* return value */ |
| 522 | __int64_t fixlen; /* length for -1 case */ |
| 523 | int i; /* extent number */ |
| 524 | int lock; /* lock state */ |
| 525 | xfs_bmbt_irec_t *map; /* buffer for user's data */ |
| 526 | xfs_mount_t *mp; /* file system mount point */ |
| 527 | int nex; /* # of user extents can do */ |
| 528 | int nexleft; /* # of user extents left */ |
| 529 | int subnex; /* # of bmapi's can do */ |
| 530 | int nmap; /* number of map entries */ |
| 531 | struct getbmapx *out; /* output structure */ |
| 532 | int whichfork; /* data or attr fork */ |
| 533 | int prealloced; /* this is a file with |
| 534 | * preallocated data space */ |
| 535 | int iflags; /* interface flags */ |
| 536 | int bmapi_flags; /* flags for xfs_bmapi */ |
| 537 | int cur_ext = 0; |
| 538 | |
| 539 | mp = ip->i_mount; |
| 540 | iflags = bmv->bmv_iflags; |
| 541 | whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK; |
| 542 | |
| 543 | if (whichfork == XFS_ATTR_FORK) { |
| 544 | if (XFS_IFORK_Q(ip)) { |
| 545 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS && |
| 546 | ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE && |
| 547 | ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 548 | return -EINVAL; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 549 | } else if (unlikely( |
| 550 | ip->i_d.di_aformat != 0 && |
| 551 | ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) { |
| 552 | XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW, |
| 553 | ip->i_mount); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 554 | return -EFSCORRUPTED; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | prealloced = 0; |
| 558 | fixlen = 1LL << 32; |
| 559 | } else { |
| 560 | if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS && |
| 561 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE && |
| 562 | ip->i_d.di_format != XFS_DINODE_FMT_LOCAL) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 563 | return -EINVAL; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 564 | |
| 565 | if (xfs_get_extsz_hint(ip) || |
| 566 | ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){ |
| 567 | prealloced = 1; |
| 568 | fixlen = mp->m_super->s_maxbytes; |
| 569 | } else { |
| 570 | prealloced = 0; |
| 571 | fixlen = XFS_ISIZE(ip); |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | if (bmv->bmv_length == -1) { |
| 576 | fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen)); |
| 577 | bmv->bmv_length = |
| 578 | max_t(__int64_t, fixlen - bmv->bmv_offset, 0); |
| 579 | } else if (bmv->bmv_length == 0) { |
| 580 | bmv->bmv_entries = 0; |
| 581 | return 0; |
| 582 | } else if (bmv->bmv_length < 0) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 583 | return -EINVAL; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | nex = bmv->bmv_count - 1; |
| 587 | if (nex <= 0) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 588 | return -EINVAL; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 589 | bmvend = bmv->bmv_offset + bmv->bmv_length; |
| 590 | |
| 591 | |
| 592 | if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 593 | return -ENOMEM; |
Dave Chinner | fdd3cce | 2013-09-02 20:53:00 +1000 | [diff] [blame] | 594 | out = kmem_zalloc_large(bmv->bmv_count * sizeof(struct getbmapx), 0); |
| 595 | if (!out) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 596 | return -ENOMEM; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 597 | |
| 598 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
Christoph Hellwig | efa70be | 2013-12-18 02:14:39 -0800 | [diff] [blame] | 599 | if (whichfork == XFS_DATA_FORK) { |
| 600 | if (!(iflags & BMV_IF_DELALLOC) && |
| 601 | (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 602 | error = filemap_write_and_wait(VFS_I(ip)->i_mapping); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 603 | if (error) |
| 604 | goto out_unlock_iolock; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 605 | |
Christoph Hellwig | efa70be | 2013-12-18 02:14:39 -0800 | [diff] [blame] | 606 | /* |
| 607 | * Even after flushing the inode, there can still be |
| 608 | * delalloc blocks on the inode beyond EOF due to |
| 609 | * speculative preallocation. These are not removed |
| 610 | * until the release function is called or the inode |
| 611 | * is inactivated. Hence we cannot assert here that |
| 612 | * ip->i_delayed_blks == 0. |
| 613 | */ |
| 614 | } |
| 615 | |
| 616 | lock = xfs_ilock_data_map_shared(ip); |
| 617 | } else { |
| 618 | lock = xfs_ilock_attr_map_shared(ip); |
| 619 | } |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 620 | |
| 621 | /* |
| 622 | * Don't let nex be bigger than the number of extents |
| 623 | * we can have assuming alternating holes and real extents. |
| 624 | */ |
| 625 | if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1) |
| 626 | nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1; |
| 627 | |
| 628 | bmapi_flags = xfs_bmapi_aflag(whichfork); |
| 629 | if (!(iflags & BMV_IF_PREALLOC)) |
| 630 | bmapi_flags |= XFS_BMAPI_IGSTATE; |
| 631 | |
| 632 | /* |
| 633 | * Allocate enough space to handle "subnex" maps at a time. |
| 634 | */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 635 | error = -ENOMEM; |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 636 | subnex = 16; |
| 637 | map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS); |
| 638 | if (!map) |
| 639 | goto out_unlock_ilock; |
| 640 | |
| 641 | bmv->bmv_entries = 0; |
| 642 | |
| 643 | if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 && |
| 644 | (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) { |
| 645 | error = 0; |
| 646 | goto out_free_map; |
| 647 | } |
| 648 | |
| 649 | nexleft = nex; |
| 650 | |
| 651 | do { |
| 652 | nmap = (nexleft > subnex) ? subnex : nexleft; |
| 653 | error = xfs_bmapi_read(ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset), |
| 654 | XFS_BB_TO_FSB(mp, bmv->bmv_length), |
| 655 | map, &nmap, bmapi_flags); |
| 656 | if (error) |
| 657 | goto out_free_map; |
| 658 | ASSERT(nmap <= subnex); |
| 659 | |
| 660 | for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) { |
| 661 | out[cur_ext].bmv_oflags = 0; |
| 662 | if (map[i].br_state == XFS_EXT_UNWRITTEN) |
| 663 | out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC; |
| 664 | else if (map[i].br_startblock == DELAYSTARTBLOCK) |
| 665 | out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC; |
| 666 | out[cur_ext].bmv_offset = |
| 667 | XFS_FSB_TO_BB(mp, map[i].br_startoff); |
| 668 | out[cur_ext].bmv_length = |
| 669 | XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
| 670 | out[cur_ext].bmv_unused1 = 0; |
| 671 | out[cur_ext].bmv_unused2 = 0; |
| 672 | |
| 673 | /* |
| 674 | * delayed allocation extents that start beyond EOF can |
| 675 | * occur due to speculative EOF allocation when the |
| 676 | * delalloc extent is larger than the largest freespace |
| 677 | * extent at conversion time. These extents cannot be |
| 678 | * converted by data writeback, so can exist here even |
| 679 | * if we are not supposed to be finding delalloc |
| 680 | * extents. |
| 681 | */ |
| 682 | if (map[i].br_startblock == DELAYSTARTBLOCK && |
| 683 | map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip))) |
| 684 | ASSERT((iflags & BMV_IF_DELALLOC) != 0); |
| 685 | |
| 686 | if (map[i].br_startblock == HOLESTARTBLOCK && |
| 687 | whichfork == XFS_ATTR_FORK) { |
| 688 | /* came to the end of attribute fork */ |
| 689 | out[cur_ext].bmv_oflags |= BMV_OF_LAST; |
| 690 | goto out_free_map; |
| 691 | } |
| 692 | |
| 693 | if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext], |
| 694 | prealloced, bmvend, |
| 695 | map[i].br_startblock)) |
| 696 | goto out_free_map; |
| 697 | |
| 698 | bmv->bmv_offset = |
| 699 | out[cur_ext].bmv_offset + |
| 700 | out[cur_ext].bmv_length; |
| 701 | bmv->bmv_length = |
| 702 | max_t(__int64_t, 0, bmvend - bmv->bmv_offset); |
| 703 | |
| 704 | /* |
| 705 | * In case we don't want to return the hole, |
| 706 | * don't increase cur_ext so that we can reuse |
| 707 | * it in the next loop. |
| 708 | */ |
| 709 | if ((iflags & BMV_IF_NO_HOLES) && |
| 710 | map[i].br_startblock == HOLESTARTBLOCK) { |
| 711 | memset(&out[cur_ext], 0, sizeof(out[cur_ext])); |
| 712 | continue; |
| 713 | } |
| 714 | |
| 715 | nexleft--; |
| 716 | bmv->bmv_entries++; |
| 717 | cur_ext++; |
| 718 | } |
| 719 | } while (nmap && nexleft && bmv->bmv_length); |
| 720 | |
| 721 | out_free_map: |
| 722 | kmem_free(map); |
| 723 | out_unlock_ilock: |
Christoph Hellwig | 01f4f32 | 2013-12-06 12:30:08 -0800 | [diff] [blame] | 724 | xfs_iunlock(ip, lock); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 725 | out_unlock_iolock: |
| 726 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
| 727 | |
| 728 | for (i = 0; i < cur_ext; i++) { |
| 729 | int full = 0; /* user array is full */ |
| 730 | |
| 731 | /* format results & advance arg */ |
| 732 | error = formatter(&arg, &out[i], &full); |
| 733 | if (error || full) |
| 734 | break; |
| 735 | } |
| 736 | |
Dave Chinner | fdd3cce | 2013-09-02 20:53:00 +1000 | [diff] [blame] | 737 | kmem_free(out); |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 738 | return error; |
| 739 | } |
| 740 | |
| 741 | /* |
| 742 | * dead simple method of punching delalyed allocation blocks from a range in |
| 743 | * the inode. Walks a block at a time so will be slow, but is only executed in |
Zhi Yong Wu | ad4809b | 2013-08-12 03:14:55 +0000 | [diff] [blame] | 744 | * rare error cases so the overhead is not critical. This will always punch out |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 745 | * both the start and end blocks, even if the ranges only partially overlap |
| 746 | * them, so it is up to the caller to ensure that partial blocks are not |
| 747 | * passed in. |
| 748 | */ |
| 749 | int |
| 750 | xfs_bmap_punch_delalloc_range( |
| 751 | struct xfs_inode *ip, |
| 752 | xfs_fileoff_t start_fsb, |
| 753 | xfs_fileoff_t length) |
| 754 | { |
| 755 | xfs_fileoff_t remaining = length; |
| 756 | int error = 0; |
| 757 | |
| 758 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 759 | |
| 760 | do { |
| 761 | int done; |
| 762 | xfs_bmbt_irec_t imap; |
| 763 | int nimaps = 1; |
| 764 | xfs_fsblock_t firstblock; |
| 765 | xfs_bmap_free_t flist; |
| 766 | |
| 767 | /* |
| 768 | * Map the range first and check that it is a delalloc extent |
| 769 | * before trying to unmap the range. Otherwise we will be |
| 770 | * trying to remove a real extent (which requires a |
| 771 | * transaction) or a hole, which is probably a bad idea... |
| 772 | */ |
| 773 | error = xfs_bmapi_read(ip, start_fsb, 1, &imap, &nimaps, |
| 774 | XFS_BMAPI_ENTIRE); |
| 775 | |
| 776 | if (error) { |
| 777 | /* something screwed, just bail */ |
| 778 | if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| 779 | xfs_alert(ip->i_mount, |
| 780 | "Failed delalloc mapping lookup ino %lld fsb %lld.", |
| 781 | ip->i_ino, start_fsb); |
| 782 | } |
| 783 | break; |
| 784 | } |
| 785 | if (!nimaps) { |
| 786 | /* nothing there */ |
| 787 | goto next_block; |
| 788 | } |
| 789 | if (imap.br_startblock != DELAYSTARTBLOCK) { |
| 790 | /* been converted, ignore */ |
| 791 | goto next_block; |
| 792 | } |
| 793 | WARN_ON(imap.br_blockcount == 0); |
| 794 | |
| 795 | /* |
| 796 | * Note: while we initialise the firstblock/flist pair, they |
| 797 | * should never be used because blocks should never be |
| 798 | * allocated or freed for a delalloc extent and hence we need |
| 799 | * don't cancel or finish them after the xfs_bunmapi() call. |
| 800 | */ |
| 801 | xfs_bmap_init(&flist, &firstblock); |
| 802 | error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock, |
| 803 | &flist, &done); |
| 804 | if (error) |
| 805 | break; |
| 806 | |
| 807 | ASSERT(!flist.xbf_count && !flist.xbf_first); |
| 808 | next_block: |
| 809 | start_fsb++; |
| 810 | remaining--; |
| 811 | } while(remaining > 0); |
| 812 | |
| 813 | return error; |
| 814 | } |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 815 | |
| 816 | /* |
| 817 | * Test whether it is appropriate to check an inode for and free post EOF |
| 818 | * blocks. The 'force' parameter determines whether we should also consider |
| 819 | * regular files that are marked preallocated or append-only. |
| 820 | */ |
| 821 | bool |
| 822 | xfs_can_free_eofblocks(struct xfs_inode *ip, bool force) |
| 823 | { |
| 824 | /* prealloc/delalloc exists only on regular files */ |
| 825 | if (!S_ISREG(ip->i_d.di_mode)) |
| 826 | return false; |
| 827 | |
| 828 | /* |
| 829 | * Zero sized files with no cached pages and delalloc blocks will not |
| 830 | * have speculative prealloc/delalloc blocks to remove. |
| 831 | */ |
| 832 | if (VFS_I(ip)->i_size == 0 && |
Dave Chinner | 2667c6f | 2014-08-04 13:23:15 +1000 | [diff] [blame] | 833 | VFS_I(ip)->i_mapping->nrpages == 0 && |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 834 | ip->i_delayed_blks == 0) |
| 835 | return false; |
| 836 | |
| 837 | /* If we haven't read in the extent list, then don't do it now. */ |
| 838 | if (!(ip->i_df.if_flags & XFS_IFEXTENTS)) |
| 839 | return false; |
| 840 | |
| 841 | /* |
| 842 | * Do not free real preallocated or append-only files unless the file |
| 843 | * has delalloc blocks and we are forced to remove them. |
| 844 | */ |
| 845 | if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) |
| 846 | if (!force || ip->i_delayed_blks == 0) |
| 847 | return false; |
| 848 | |
| 849 | return true; |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * This is called by xfs_inactive to free any blocks beyond eof |
| 854 | * when the link count isn't zero and by xfs_dm_punch_hole() when |
| 855 | * punching a hole to EOF. |
| 856 | */ |
| 857 | int |
| 858 | xfs_free_eofblocks( |
| 859 | xfs_mount_t *mp, |
| 860 | xfs_inode_t *ip, |
| 861 | bool need_iolock) |
| 862 | { |
| 863 | xfs_trans_t *tp; |
| 864 | int error; |
| 865 | xfs_fileoff_t end_fsb; |
| 866 | xfs_fileoff_t last_fsb; |
| 867 | xfs_filblks_t map_len; |
| 868 | int nimaps; |
| 869 | xfs_bmbt_irec_t imap; |
| 870 | |
| 871 | /* |
| 872 | * Figure out if there are any blocks beyond the end |
| 873 | * of the file. If not, then there is nothing to do. |
| 874 | */ |
| 875 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)); |
| 876 | last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
| 877 | if (last_fsb <= end_fsb) |
| 878 | return 0; |
| 879 | map_len = last_fsb - end_fsb; |
| 880 | |
| 881 | nimaps = 1; |
| 882 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 883 | error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0); |
| 884 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 885 | |
| 886 | if (!error && (nimaps != 0) && |
| 887 | (imap.br_startblock != HOLESTARTBLOCK || |
| 888 | ip->i_delayed_blks)) { |
| 889 | /* |
| 890 | * Attach the dquots to the inode up front. |
| 891 | */ |
| 892 | error = xfs_qm_dqattach(ip, 0); |
| 893 | if (error) |
| 894 | return error; |
| 895 | |
| 896 | /* |
| 897 | * There are blocks after the end of file. |
| 898 | * Free them up now by truncating the file to |
| 899 | * its current size. |
| 900 | */ |
| 901 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| 902 | |
| 903 | if (need_iolock) { |
| 904 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 905 | xfs_trans_cancel(tp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 906 | return -EAGAIN; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 907 | } |
| 908 | } |
| 909 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 910 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 911 | if (error) { |
| 912 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 913 | xfs_trans_cancel(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 914 | if (need_iolock) |
| 915 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 916 | return error; |
| 917 | } |
| 918 | |
| 919 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 920 | xfs_trans_ijoin(tp, ip, 0); |
| 921 | |
| 922 | /* |
| 923 | * Do not update the on-disk file size. If we update the |
| 924 | * on-disk file size and then the system crashes before the |
| 925 | * contents of the file are flushed to disk then the files |
| 926 | * may be full of holes (ie NULL files bug). |
| 927 | */ |
| 928 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, |
| 929 | XFS_ISIZE(ip)); |
| 930 | if (error) { |
| 931 | /* |
| 932 | * If we get an error at this point we simply don't |
| 933 | * bother truncating the file. |
| 934 | */ |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 935 | xfs_trans_cancel(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 936 | } else { |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 937 | error = xfs_trans_commit(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 938 | if (!error) |
| 939 | xfs_inode_clear_eofblocks_tag(ip); |
| 940 | } |
| 941 | |
| 942 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 943 | if (need_iolock) |
| 944 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 945 | } |
| 946 | return error; |
| 947 | } |
| 948 | |
Christoph Hellwig | 83aee9e | 2013-10-12 00:55:07 -0700 | [diff] [blame] | 949 | int |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 950 | xfs_alloc_file_space( |
Christoph Hellwig | 83aee9e | 2013-10-12 00:55:07 -0700 | [diff] [blame] | 951 | struct xfs_inode *ip, |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 952 | xfs_off_t offset, |
| 953 | xfs_off_t len, |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 954 | int alloc_type) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 955 | { |
| 956 | xfs_mount_t *mp = ip->i_mount; |
| 957 | xfs_off_t count; |
| 958 | xfs_filblks_t allocated_fsb; |
| 959 | xfs_filblks_t allocatesize_fsb; |
| 960 | xfs_extlen_t extsz, temp; |
| 961 | xfs_fileoff_t startoffset_fsb; |
| 962 | xfs_fsblock_t firstfsb; |
| 963 | int nimaps; |
| 964 | int quota_flag; |
| 965 | int rt; |
| 966 | xfs_trans_t *tp; |
| 967 | xfs_bmbt_irec_t imaps[1], *imapp; |
| 968 | xfs_bmap_free_t free_list; |
| 969 | uint qblocks, resblks, resrtextents; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 970 | int error; |
| 971 | |
| 972 | trace_xfs_alloc_file_space(ip); |
| 973 | |
| 974 | if (XFS_FORCED_SHUTDOWN(mp)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 975 | return -EIO; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 976 | |
| 977 | error = xfs_qm_dqattach(ip, 0); |
| 978 | if (error) |
| 979 | return error; |
| 980 | |
| 981 | if (len <= 0) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 982 | return -EINVAL; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 983 | |
| 984 | rt = XFS_IS_REALTIME_INODE(ip); |
| 985 | extsz = xfs_get_extsz_hint(ip); |
| 986 | |
| 987 | count = len; |
| 988 | imapp = &imaps[0]; |
| 989 | nimaps = 1; |
| 990 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 991 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); |
| 992 | |
| 993 | /* |
| 994 | * Allocate file space until done or until there is an error |
| 995 | */ |
| 996 | while (allocatesize_fsb && !error) { |
| 997 | xfs_fileoff_t s, e; |
| 998 | |
| 999 | /* |
| 1000 | * Determine space reservations for data/realtime. |
| 1001 | */ |
| 1002 | if (unlikely(extsz)) { |
| 1003 | s = startoffset_fsb; |
| 1004 | do_div(s, extsz); |
| 1005 | s *= extsz; |
| 1006 | e = startoffset_fsb + allocatesize_fsb; |
| 1007 | if ((temp = do_mod(startoffset_fsb, extsz))) |
| 1008 | e += temp; |
| 1009 | if ((temp = do_mod(e, extsz))) |
| 1010 | e += extsz - temp; |
| 1011 | } else { |
| 1012 | s = 0; |
| 1013 | e = allocatesize_fsb; |
| 1014 | } |
| 1015 | |
| 1016 | /* |
| 1017 | * The transaction reservation is limited to a 32-bit block |
| 1018 | * count, hence we need to limit the number of blocks we are |
| 1019 | * trying to reserve to avoid an overflow. We can't allocate |
| 1020 | * more than @nimaps extents, and an extent is limited on disk |
| 1021 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. |
| 1022 | */ |
| 1023 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); |
| 1024 | if (unlikely(rt)) { |
| 1025 | resrtextents = qblocks = resblks; |
| 1026 | resrtextents /= mp->m_sb.sb_rextsize; |
| 1027 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 1028 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 1029 | } else { |
| 1030 | resrtextents = 0; |
| 1031 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
| 1032 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
| 1033 | } |
| 1034 | |
| 1035 | /* |
| 1036 | * Allocate and setup the transaction. |
| 1037 | */ |
| 1038 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1039 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 1040 | resblks, resrtextents); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1041 | /* |
| 1042 | * Check for running out of space |
| 1043 | */ |
| 1044 | if (error) { |
| 1045 | /* |
| 1046 | * Free the transaction structure. |
| 1047 | */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1048 | ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1049 | xfs_trans_cancel(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1050 | break; |
| 1051 | } |
| 1052 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1053 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
| 1054 | 0, quota_flag); |
| 1055 | if (error) |
| 1056 | goto error1; |
| 1057 | |
| 1058 | xfs_trans_ijoin(tp, ip, 0); |
| 1059 | |
| 1060 | xfs_bmap_init(&free_list, &firstfsb); |
| 1061 | error = xfs_bmapi_write(tp, ip, startoffset_fsb, |
| 1062 | allocatesize_fsb, alloc_type, &firstfsb, |
Brian Foster | dbd5c8c | 2015-10-12 16:04:13 +1100 | [diff] [blame] | 1063 | resblks, imapp, &nimaps, &free_list); |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1064 | if (error) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1065 | goto error0; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1066 | |
| 1067 | /* |
| 1068 | * Complete the transaction |
| 1069 | */ |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1070 | error = xfs_bmap_finish(&tp, &free_list, NULL); |
| 1071 | if (error) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1072 | goto error0; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1073 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1074 | error = xfs_trans_commit(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1075 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1076 | if (error) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1077 | break; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1078 | |
| 1079 | allocated_fsb = imapp->br_blockcount; |
| 1080 | |
| 1081 | if (nimaps == 0) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1082 | error = -ENOSPC; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1083 | break; |
| 1084 | } |
| 1085 | |
| 1086 | startoffset_fsb += allocated_fsb; |
| 1087 | allocatesize_fsb -= allocated_fsb; |
| 1088 | } |
| 1089 | |
| 1090 | return error; |
| 1091 | |
| 1092 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
| 1093 | xfs_bmap_cancel(&free_list); |
| 1094 | xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag); |
| 1095 | |
| 1096 | error1: /* Just cancel transaction */ |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1097 | xfs_trans_cancel(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1098 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1099 | return error; |
| 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * Zero file bytes between startoff and endoff inclusive. |
| 1104 | * The iolock is held exclusive and no blocks are buffered. |
| 1105 | * |
| 1106 | * This function is used by xfs_free_file_space() to zero |
| 1107 | * partial blocks when the range to free is not block aligned. |
| 1108 | * When unreserving space with boundaries that are not block |
| 1109 | * aligned we round up the start and round down the end |
| 1110 | * boundaries and then use this function to zero the parts of |
| 1111 | * the blocks that got dropped during the rounding. |
| 1112 | */ |
| 1113 | STATIC int |
| 1114 | xfs_zero_remaining_bytes( |
| 1115 | xfs_inode_t *ip, |
| 1116 | xfs_off_t startoff, |
| 1117 | xfs_off_t endoff) |
| 1118 | { |
| 1119 | xfs_bmbt_irec_t imap; |
| 1120 | xfs_fileoff_t offset_fsb; |
| 1121 | xfs_off_t lastoffset; |
| 1122 | xfs_off_t offset; |
| 1123 | xfs_buf_t *bp; |
| 1124 | xfs_mount_t *mp = ip->i_mount; |
| 1125 | int nimap; |
| 1126 | int error = 0; |
| 1127 | |
| 1128 | /* |
| 1129 | * Avoid doing I/O beyond eof - it's not necessary |
| 1130 | * since nothing can read beyond eof. The space will |
| 1131 | * be zeroed when the file is extended anyway. |
| 1132 | */ |
| 1133 | if (startoff >= XFS_ISIZE(ip)) |
| 1134 | return 0; |
| 1135 | |
| 1136 | if (endoff > XFS_ISIZE(ip)) |
| 1137 | endoff = XFS_ISIZE(ip); |
| 1138 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1139 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
Christoph Hellwig | 4f31736 | 2013-12-06 12:30:12 -0800 | [diff] [blame] | 1140 | uint lock_mode; |
| 1141 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1142 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 1143 | nimap = 1; |
Christoph Hellwig | 4f31736 | 2013-12-06 12:30:12 -0800 | [diff] [blame] | 1144 | |
| 1145 | lock_mode = xfs_ilock_data_map_shared(ip); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1146 | error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0); |
Christoph Hellwig | 4f31736 | 2013-12-06 12:30:12 -0800 | [diff] [blame] | 1147 | xfs_iunlock(ip, lock_mode); |
| 1148 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1149 | if (error || nimap < 1) |
| 1150 | break; |
| 1151 | ASSERT(imap.br_blockcount >= 1); |
| 1152 | ASSERT(imap.br_startoff == offset_fsb); |
Dave Chinner | 4f69f57 | 2015-06-04 09:19:08 +1000 | [diff] [blame] | 1153 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 1154 | |
| 1155 | if (imap.br_startblock == HOLESTARTBLOCK || |
| 1156 | imap.br_state == XFS_EXT_UNWRITTEN) { |
| 1157 | /* skip the entire extent */ |
| 1158 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + |
| 1159 | imap.br_blockcount) - 1; |
| 1160 | continue; |
| 1161 | } |
| 1162 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1163 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; |
| 1164 | if (lastoffset > endoff) |
| 1165 | lastoffset = endoff; |
Dave Chinner | 4f69f57 | 2015-06-04 09:19:08 +1000 | [diff] [blame] | 1166 | |
| 1167 | /* DAX can just zero the backing device directly */ |
| 1168 | if (IS_DAX(VFS_I(ip))) { |
| 1169 | error = dax_zero_page_range(VFS_I(ip), offset, |
| 1170 | lastoffset - offset + 1, |
| 1171 | xfs_get_blocks_direct); |
| 1172 | if (error) |
| 1173 | return error; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1174 | continue; |
Dave Chinner | 4f69f57 | 2015-06-04 09:19:08 +1000 | [diff] [blame] | 1175 | } |
Christoph Hellwig | 83a0adc | 2013-12-17 00:03:52 -0800 | [diff] [blame] | 1176 | |
Christoph Hellwig | 8c15612 | 2014-10-02 09:05:44 +1000 | [diff] [blame] | 1177 | error = xfs_buf_read_uncached(XFS_IS_REALTIME_INODE(ip) ? |
| 1178 | mp->m_rtdev_targp : mp->m_ddev_targp, |
| 1179 | xfs_fsb_to_db(ip, imap.br_startblock), |
| 1180 | BTOBB(mp->m_sb.sb_blocksize), |
| 1181 | 0, &bp, NULL); |
| 1182 | if (error) |
| 1183 | return error; |
| 1184 | |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1185 | memset(bp->b_addr + |
Christoph Hellwig | 8c15612 | 2014-10-02 09:05:44 +1000 | [diff] [blame] | 1186 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
| 1187 | 0, lastoffset - offset + 1); |
Christoph Hellwig | 83a0adc | 2013-12-17 00:03:52 -0800 | [diff] [blame] | 1188 | |
Christoph Hellwig | 8c15612 | 2014-10-02 09:05:44 +1000 | [diff] [blame] | 1189 | error = xfs_bwrite(bp); |
| 1190 | xfs_buf_relse(bp); |
| 1191 | if (error) |
| 1192 | return error; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1193 | } |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1194 | return error; |
| 1195 | } |
| 1196 | |
Christoph Hellwig | 83aee9e | 2013-10-12 00:55:07 -0700 | [diff] [blame] | 1197 | int |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1198 | xfs_free_file_space( |
Christoph Hellwig | 83aee9e | 2013-10-12 00:55:07 -0700 | [diff] [blame] | 1199 | struct xfs_inode *ip, |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1200 | xfs_off_t offset, |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1201 | xfs_off_t len) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1202 | { |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1203 | int done; |
| 1204 | xfs_fileoff_t endoffset_fsb; |
| 1205 | int error; |
| 1206 | xfs_fsblock_t firstfsb; |
| 1207 | xfs_bmap_free_t free_list; |
| 1208 | xfs_bmbt_irec_t imap; |
| 1209 | xfs_off_t ioffset; |
Brian Foster | 8b5279e | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1210 | xfs_off_t iendoffset; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1211 | xfs_extlen_t mod=0; |
| 1212 | xfs_mount_t *mp; |
| 1213 | int nimap; |
| 1214 | uint resblks; |
| 1215 | xfs_off_t rounding; |
| 1216 | int rt; |
| 1217 | xfs_fileoff_t startoffset_fsb; |
| 1218 | xfs_trans_t *tp; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1219 | |
| 1220 | mp = ip->i_mount; |
| 1221 | |
| 1222 | trace_xfs_free_file_space(ip); |
| 1223 | |
| 1224 | error = xfs_qm_dqattach(ip, 0); |
| 1225 | if (error) |
| 1226 | return error; |
| 1227 | |
| 1228 | error = 0; |
| 1229 | if (len <= 0) /* if nothing being freed */ |
| 1230 | return error; |
| 1231 | rt = XFS_IS_REALTIME_INODE(ip); |
| 1232 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
| 1233 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
| 1234 | |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1235 | /* wait for the completion of any pending DIOs */ |
| 1236 | inode_dio_wait(VFS_I(ip)); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1237 | |
| 1238 | rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
Brian Foster | 8b5279e | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1239 | ioffset = round_down(offset, rounding); |
| 1240 | iendoffset = round_up(offset + len, rounding) - 1; |
| 1241 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, ioffset, |
| 1242 | iendoffset); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1243 | if (error) |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1244 | goto out; |
Brian Foster | 8b5279e | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1245 | truncate_pagecache_range(VFS_I(ip), ioffset, iendoffset); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1246 | |
| 1247 | /* |
| 1248 | * Need to zero the stuff we're not freeing, on disk. |
| 1249 | * If it's a realtime file & can't use unwritten extents then we |
| 1250 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
| 1251 | * will take care of it for us. |
| 1252 | */ |
| 1253 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
| 1254 | nimap = 1; |
| 1255 | error = xfs_bmapi_read(ip, startoffset_fsb, 1, |
| 1256 | &imap, &nimap, 0); |
| 1257 | if (error) |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1258 | goto out; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1259 | ASSERT(nimap == 0 || nimap == 1); |
| 1260 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 1261 | xfs_daddr_t block; |
| 1262 | |
| 1263 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 1264 | block = imap.br_startblock; |
| 1265 | mod = do_div(block, mp->m_sb.sb_rextsize); |
| 1266 | if (mod) |
| 1267 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; |
| 1268 | } |
| 1269 | nimap = 1; |
| 1270 | error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1, |
| 1271 | &imap, &nimap, 0); |
| 1272 | if (error) |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1273 | goto out; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1274 | ASSERT(nimap == 0 || nimap == 1); |
| 1275 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| 1276 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| 1277 | mod++; |
| 1278 | if (mod && (mod != mp->m_sb.sb_rextsize)) |
| 1279 | endoffset_fsb -= mod; |
| 1280 | } |
| 1281 | } |
| 1282 | if ((done = (endoffset_fsb <= startoffset_fsb))) |
| 1283 | /* |
| 1284 | * One contiguous piece to clear |
| 1285 | */ |
| 1286 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); |
| 1287 | else { |
| 1288 | /* |
| 1289 | * Some full blocks, possibly two pieces to clear |
| 1290 | */ |
| 1291 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) |
| 1292 | error = xfs_zero_remaining_bytes(ip, offset, |
| 1293 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); |
| 1294 | if (!error && |
| 1295 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) |
| 1296 | error = xfs_zero_remaining_bytes(ip, |
| 1297 | XFS_FSB_TO_B(mp, endoffset_fsb), |
| 1298 | offset + len - 1); |
| 1299 | } |
| 1300 | |
| 1301 | /* |
| 1302 | * free file space until done or until there is an error |
| 1303 | */ |
| 1304 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 1305 | while (!error && !done) { |
| 1306 | |
| 1307 | /* |
| 1308 | * allocate and setup the transaction. Allow this |
| 1309 | * transaction to dip into the reserve blocks to ensure |
| 1310 | * the freeing of the space succeeds at ENOSPC. |
| 1311 | */ |
| 1312 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1313 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, resblks, 0); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1314 | |
| 1315 | /* |
| 1316 | * check for running out of space |
| 1317 | */ |
| 1318 | if (error) { |
| 1319 | /* |
| 1320 | * Free the transaction structure. |
| 1321 | */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1322 | ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1323 | xfs_trans_cancel(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1324 | break; |
| 1325 | } |
| 1326 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1327 | error = xfs_trans_reserve_quota(tp, mp, |
| 1328 | ip->i_udquot, ip->i_gdquot, ip->i_pdquot, |
| 1329 | resblks, 0, XFS_QMOPT_RES_REGBLKS); |
| 1330 | if (error) |
| 1331 | goto error1; |
| 1332 | |
| 1333 | xfs_trans_ijoin(tp, ip, 0); |
| 1334 | |
| 1335 | /* |
| 1336 | * issue the bunmapi() call to free the blocks |
| 1337 | */ |
| 1338 | xfs_bmap_init(&free_list, &firstfsb); |
| 1339 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
| 1340 | endoffset_fsb - startoffset_fsb, |
| 1341 | 0, 2, &firstfsb, &free_list, &done); |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1342 | if (error) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1343 | goto error0; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1344 | |
| 1345 | /* |
| 1346 | * complete the transaction |
| 1347 | */ |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1348 | error = xfs_bmap_finish(&tp, &free_list, NULL); |
| 1349 | if (error) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1350 | goto error0; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1351 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1352 | error = xfs_trans_commit(tp); |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1353 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1354 | } |
| 1355 | |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1356 | out: |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1357 | return error; |
| 1358 | |
| 1359 | error0: |
| 1360 | xfs_bmap_cancel(&free_list); |
| 1361 | error1: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1362 | xfs_trans_cancel(tp); |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1363 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 1364 | goto out; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1365 | } |
| 1366 | |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1367 | /* |
| 1368 | * Preallocate and zero a range of a file. This mechanism has the allocation |
| 1369 | * semantics of fallocate and in addition converts data in the range to zeroes. |
| 1370 | */ |
Christoph Hellwig | 865e944 | 2013-10-12 00:55:08 -0700 | [diff] [blame] | 1371 | int |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1372 | xfs_zero_file_space( |
| 1373 | struct xfs_inode *ip, |
| 1374 | xfs_off_t offset, |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1375 | xfs_off_t len) |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1376 | { |
| 1377 | struct xfs_mount *mp = ip->i_mount; |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1378 | uint blksize; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1379 | int error; |
| 1380 | |
Dave Chinner | 897b73b | 2014-04-14 18:15:11 +1000 | [diff] [blame] | 1381 | trace_xfs_zero_file_space(ip); |
| 1382 | |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1383 | blksize = 1 << mp->m_sb.sb_blocklog; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1384 | |
| 1385 | /* |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1386 | * Punch a hole and prealloc the range. We use hole punch rather than |
| 1387 | * unwritten extent conversion for two reasons: |
| 1388 | * |
| 1389 | * 1.) Hole punch handles partial block zeroing for us. |
| 1390 | * |
| 1391 | * 2.) If prealloc returns ENOSPC, the file range is still zero-valued |
| 1392 | * by virtue of the hole punch. |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1393 | */ |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1394 | error = xfs_free_file_space(ip, offset, len); |
| 1395 | if (error) |
| 1396 | goto out; |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1397 | |
Brian Foster | 5d11fb4 | 2014-10-30 10:35:11 +1100 | [diff] [blame] | 1398 | error = xfs_alloc_file_space(ip, round_down(offset, blksize), |
| 1399 | round_up(offset + len, blksize) - |
| 1400 | round_down(offset, blksize), |
| 1401 | XFS_BMAPI_PREALLOC); |
Christoph Hellwig | 5f8aca8 | 2013-10-12 00:55:06 -0700 | [diff] [blame] | 1402 | out: |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 1403 | return error; |
| 1404 | |
| 1405 | } |
| 1406 | |
| 1407 | /* |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1408 | * @next_fsb will keep track of the extent currently undergoing shift. |
| 1409 | * @stop_fsb will keep track of the extent at which we have to stop. |
| 1410 | * If we are shifting left, we will start with block (offset + len) and |
| 1411 | * shift each extent till last extent. |
| 1412 | * If we are shifting right, we will start with last extent inside file space |
| 1413 | * and continue until we reach the block corresponding to offset. |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1414 | */ |
kbuild test robot | 72c1a73 | 2015-04-13 11:25:04 +1000 | [diff] [blame] | 1415 | static int |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1416 | xfs_shift_file_space( |
| 1417 | struct xfs_inode *ip, |
| 1418 | xfs_off_t offset, |
| 1419 | xfs_off_t len, |
| 1420 | enum shift_direction direction) |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1421 | { |
| 1422 | int done = 0; |
| 1423 | struct xfs_mount *mp = ip->i_mount; |
| 1424 | struct xfs_trans *tp; |
| 1425 | int error; |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1426 | struct xfs_bmap_free free_list; |
| 1427 | xfs_fsblock_t first_block; |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1428 | xfs_fileoff_t stop_fsb; |
Brian Foster | 2c845f5 | 2014-09-23 15:37:09 +1000 | [diff] [blame] | 1429 | xfs_fileoff_t next_fsb; |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1430 | xfs_fileoff_t shift_fsb; |
| 1431 | |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1432 | ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1433 | |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1434 | if (direction == SHIFT_LEFT) { |
| 1435 | next_fsb = XFS_B_TO_FSB(mp, offset + len); |
| 1436 | stop_fsb = XFS_B_TO_FSB(mp, VFS_I(ip)->i_size); |
| 1437 | } else { |
| 1438 | /* |
| 1439 | * If right shift, delegate the work of initialization of |
| 1440 | * next_fsb to xfs_bmap_shift_extent as it has ilock held. |
| 1441 | */ |
| 1442 | next_fsb = NULLFSBLOCK; |
| 1443 | stop_fsb = XFS_B_TO_FSB(mp, offset); |
| 1444 | } |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1445 | |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1446 | shift_fsb = XFS_B_TO_FSB(mp, len); |
| 1447 | |
Brian Foster | f71721d | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1448 | /* |
| 1449 | * Trim eofblocks to avoid shifting uninitialized post-eof preallocation |
| 1450 | * into the accessible region of the file. |
| 1451 | */ |
Brian Foster | 41b9d72 | 2014-09-02 12:12:53 +1000 | [diff] [blame] | 1452 | if (xfs_can_free_eofblocks(ip, true)) { |
| 1453 | error = xfs_free_eofblocks(mp, ip, false); |
| 1454 | if (error) |
| 1455 | return error; |
| 1456 | } |
Dave Chinner | 1669a8c | 2014-09-02 12:12:53 +1000 | [diff] [blame] | 1457 | |
Brian Foster | f71721d | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1458 | /* |
| 1459 | * Writeback and invalidate cache for the remainder of the file as we're |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1460 | * about to shift down every extent from offset to EOF. |
Brian Foster | f71721d | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1461 | */ |
| 1462 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1463 | offset, -1); |
Brian Foster | f71721d | 2014-09-23 15:39:05 +1000 | [diff] [blame] | 1464 | if (error) |
| 1465 | return error; |
| 1466 | error = invalidate_inode_pages2_range(VFS_I(ip)->i_mapping, |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1467 | offset >> PAGE_CACHE_SHIFT, -1); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1468 | if (error) |
| 1469 | return error; |
| 1470 | |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1471 | /* |
| 1472 | * The extent shiting code works on extent granularity. So, if |
| 1473 | * stop_fsb is not the starting block of extent, we need to split |
| 1474 | * the extent at stop_fsb. |
| 1475 | */ |
| 1476 | if (direction == SHIFT_RIGHT) { |
| 1477 | error = xfs_bmap_split_extent(ip, stop_fsb); |
| 1478 | if (error) |
| 1479 | return error; |
| 1480 | } |
| 1481 | |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1482 | while (!error && !done) { |
| 1483 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1484 | /* |
| 1485 | * We would need to reserve permanent block for transaction. |
| 1486 | * This will come into picture when after shifting extent into |
| 1487 | * hole we found that adjacent extents can be merged which |
| 1488 | * may lead to freeing of a block during record update. |
| 1489 | */ |
| 1490 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 1491 | XFS_DIOSTRAT_SPACE_RES(mp, 0), 0); |
| 1492 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1493 | xfs_trans_cancel(tp); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1494 | break; |
| 1495 | } |
| 1496 | |
| 1497 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1498 | error = xfs_trans_reserve_quota(tp, mp, ip->i_udquot, |
| 1499 | ip->i_gdquot, ip->i_pdquot, |
| 1500 | XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, |
| 1501 | XFS_QMOPT_RES_REGBLKS); |
| 1502 | if (error) |
Brian Foster | d4a97a0 | 2015-08-19 10:01:40 +1000 | [diff] [blame] | 1503 | goto out_trans_cancel; |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1504 | |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1505 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1506 | |
| 1507 | xfs_bmap_init(&free_list, &first_block); |
| 1508 | |
| 1509 | /* |
| 1510 | * We are using the write transaction in which max 2 bmbt |
| 1511 | * updates are allowed |
| 1512 | */ |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1513 | error = xfs_bmap_shift_extents(tp, ip, &next_fsb, shift_fsb, |
| 1514 | &done, stop_fsb, &first_block, &free_list, |
| 1515 | direction, XFS_BMAP_MAX_SHIFT_EXTENTS); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1516 | if (error) |
Brian Foster | d4a97a0 | 2015-08-19 10:01:40 +1000 | [diff] [blame] | 1517 | goto out_bmap_cancel; |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1518 | |
Eric Sandeen | f6106ef | 2016-01-11 11:34:01 +1100 | [diff] [blame] | 1519 | error = xfs_bmap_finish(&tp, &free_list, NULL); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1520 | if (error) |
Brian Foster | d4a97a0 | 2015-08-19 10:01:40 +1000 | [diff] [blame] | 1521 | goto out_bmap_cancel; |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1522 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1523 | error = xfs_trans_commit(tp); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | return error; |
| 1527 | |
Brian Foster | d4a97a0 | 2015-08-19 10:01:40 +1000 | [diff] [blame] | 1528 | out_bmap_cancel: |
| 1529 | xfs_bmap_cancel(&free_list); |
| 1530 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1531 | xfs_trans_cancel(tp); |
Namjae Jeon | e1d8fb8 | 2014-02-24 10:58:19 +1100 | [diff] [blame] | 1532 | return error; |
| 1533 | } |
| 1534 | |
| 1535 | /* |
Namjae Jeon | a904b1c | 2015-03-25 15:08:56 +1100 | [diff] [blame] | 1536 | * xfs_collapse_file_space() |
| 1537 | * This routine frees disk space and shift extent for the given file. |
| 1538 | * The first thing we do is to free data blocks in the specified range |
| 1539 | * by calling xfs_free_file_space(). It would also sync dirty data |
| 1540 | * and invalidate page cache over the region on which collapse range |
| 1541 | * is working. And Shift extent records to the left to cover a hole. |
| 1542 | * RETURNS: |
| 1543 | * 0 on success |
| 1544 | * errno on error |
| 1545 | * |
| 1546 | */ |
| 1547 | int |
| 1548 | xfs_collapse_file_space( |
| 1549 | struct xfs_inode *ip, |
| 1550 | xfs_off_t offset, |
| 1551 | xfs_off_t len) |
| 1552 | { |
| 1553 | int error; |
| 1554 | |
| 1555 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
| 1556 | trace_xfs_collapse_file_space(ip); |
| 1557 | |
| 1558 | error = xfs_free_file_space(ip, offset, len); |
| 1559 | if (error) |
| 1560 | return error; |
| 1561 | |
| 1562 | return xfs_shift_file_space(ip, offset, len, SHIFT_LEFT); |
| 1563 | } |
| 1564 | |
| 1565 | /* |
| 1566 | * xfs_insert_file_space() |
| 1567 | * This routine create hole space by shifting extents for the given file. |
| 1568 | * The first thing we do is to sync dirty data and invalidate page cache |
| 1569 | * over the region on which insert range is working. And split an extent |
| 1570 | * to two extents at given offset by calling xfs_bmap_split_extent. |
| 1571 | * And shift all extent records which are laying between [offset, |
| 1572 | * last allocated extent] to the right to reserve hole range. |
| 1573 | * RETURNS: |
| 1574 | * 0 on success |
| 1575 | * errno on error |
| 1576 | */ |
| 1577 | int |
| 1578 | xfs_insert_file_space( |
| 1579 | struct xfs_inode *ip, |
| 1580 | loff_t offset, |
| 1581 | loff_t len) |
| 1582 | { |
| 1583 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
| 1584 | trace_xfs_insert_file_space(ip); |
| 1585 | |
| 1586 | return xfs_shift_file_space(ip, offset, len, SHIFT_RIGHT); |
| 1587 | } |
| 1588 | |
| 1589 | /* |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1590 | * We need to check that the format of the data fork in the temporary inode is |
| 1591 | * valid for the target inode before doing the swap. This is not a problem with |
| 1592 | * attr1 because of the fixed fork offset, but attr2 has a dynamically sized |
| 1593 | * data fork depending on the space the attribute fork is taking so we can get |
| 1594 | * invalid formats on the target inode. |
| 1595 | * |
| 1596 | * E.g. target has space for 7 extents in extent format, temp inode only has |
| 1597 | * space for 6. If we defragment down to 7 extents, then the tmp format is a |
| 1598 | * btree, but when swapped it needs to be in extent format. Hence we can't just |
| 1599 | * blindly swap data forks on attr2 filesystems. |
| 1600 | * |
| 1601 | * Note that we check the swap in both directions so that we don't end up with |
| 1602 | * a corrupt temporary inode, either. |
| 1603 | * |
| 1604 | * Note that fixing the way xfs_fsr sets up the attribute fork in the source |
| 1605 | * inode will prevent this situation from occurring, so all we do here is |
| 1606 | * reject and log the attempt. basically we are putting the responsibility on |
| 1607 | * userspace to get this right. |
| 1608 | */ |
| 1609 | static int |
| 1610 | xfs_swap_extents_check_format( |
| 1611 | xfs_inode_t *ip, /* target inode */ |
| 1612 | xfs_inode_t *tip) /* tmp inode */ |
| 1613 | { |
| 1614 | |
| 1615 | /* Should never get a local format */ |
| 1616 | if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL || |
| 1617 | tip->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1618 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1619 | |
| 1620 | /* |
| 1621 | * if the target inode has less extents that then temporary inode then |
| 1622 | * why did userspace call us? |
| 1623 | */ |
| 1624 | if (ip->i_d.di_nextents < tip->i_d.di_nextents) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1625 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1626 | |
| 1627 | /* |
| 1628 | * if the target inode is in extent form and the temp inode is in btree |
| 1629 | * form then we will end up with the target inode in the wrong format |
| 1630 | * as we already know there are less extents in the temp inode. |
| 1631 | */ |
| 1632 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| 1633 | tip->i_d.di_format == XFS_DINODE_FMT_BTREE) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1634 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1635 | |
| 1636 | /* Check temp in extent form to max in target */ |
| 1637 | if (tip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| 1638 | XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) > |
| 1639 | XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1640 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1641 | |
| 1642 | /* Check target in extent form to max in temp */ |
| 1643 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| 1644 | XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) > |
| 1645 | XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1646 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1647 | |
| 1648 | /* |
| 1649 | * If we are in a btree format, check that the temp root block will fit |
| 1650 | * in the target and that it has enough extents to be in btree format |
| 1651 | * in the target. |
| 1652 | * |
| 1653 | * Note that we have to be careful to allow btree->extent conversions |
| 1654 | * (a common defrag case) which will occur when the temp inode is in |
| 1655 | * extent format... |
| 1656 | */ |
| 1657 | if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
| 1658 | if (XFS_IFORK_BOFF(ip) && |
| 1659 | XFS_BMAP_BMDR_SPACE(tip->i_df.if_broot) > XFS_IFORK_BOFF(ip)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1660 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1661 | if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <= |
| 1662 | XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1663 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | /* Reciprocal target->temp btree format checks */ |
| 1667 | if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
| 1668 | if (XFS_IFORK_BOFF(tip) && |
| 1669 | XFS_BMAP_BMDR_SPACE(ip->i_df.if_broot) > XFS_IFORK_BOFF(tip)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1670 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1671 | if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <= |
| 1672 | XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1673 | return -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1674 | } |
| 1675 | |
| 1676 | return 0; |
| 1677 | } |
| 1678 | |
Dave Chinner | 7abbb8f | 2014-09-23 16:20:11 +1000 | [diff] [blame] | 1679 | static int |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1680 | xfs_swap_extent_flush( |
| 1681 | struct xfs_inode *ip) |
| 1682 | { |
| 1683 | int error; |
| 1684 | |
| 1685 | error = filemap_write_and_wait(VFS_I(ip)->i_mapping); |
| 1686 | if (error) |
| 1687 | return error; |
| 1688 | truncate_pagecache_range(VFS_I(ip), 0, -1); |
| 1689 | |
| 1690 | /* Verify O_DIRECT for ftmp */ |
| 1691 | if (VFS_I(ip)->i_mapping->nrpages) |
| 1692 | return -EINVAL; |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1693 | return 0; |
| 1694 | } |
| 1695 | |
| 1696 | int |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1697 | xfs_swap_extents( |
| 1698 | xfs_inode_t *ip, /* target inode */ |
| 1699 | xfs_inode_t *tip, /* tmp inode */ |
| 1700 | xfs_swapext_t *sxp) |
| 1701 | { |
| 1702 | xfs_mount_t *mp = ip->i_mount; |
| 1703 | xfs_trans_t *tp; |
| 1704 | xfs_bstat_t *sbp = &sxp->sx_stat; |
| 1705 | xfs_ifork_t *tempifp, *ifp, *tifp; |
| 1706 | int src_log_flags, target_log_flags; |
| 1707 | int error = 0; |
| 1708 | int aforkblks = 0; |
| 1709 | int taforkblks = 0; |
| 1710 | __uint64_t tmp; |
Dave Chinner | 8121768 | 2014-08-04 13:29:32 +1000 | [diff] [blame] | 1711 | int lock_flags; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1712 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1713 | tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL); |
| 1714 | if (!tempifp) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1715 | error = -ENOMEM; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1716 | goto out; |
| 1717 | } |
| 1718 | |
| 1719 | /* |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1720 | * Lock the inodes against other IO, page faults and truncate to |
| 1721 | * begin with. Then we can ensure the inodes are flushed and have no |
| 1722 | * page cache safely. Once we have done this we can take the ilocks and |
| 1723 | * do the rest of the checks. |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1724 | */ |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1725 | lock_flags = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1726 | xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL); |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1727 | xfs_lock_two_inodes(ip, tip, XFS_MMAPLOCK_EXCL); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1728 | |
| 1729 | /* Verify that both files have the same format */ |
| 1730 | if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1731 | error = -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1732 | goto out_unlock; |
| 1733 | } |
| 1734 | |
| 1735 | /* Verify both files are either real-time or non-realtime */ |
| 1736 | if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1737 | error = -EINVAL; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1738 | goto out_unlock; |
| 1739 | } |
| 1740 | |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1741 | error = xfs_swap_extent_flush(ip); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1742 | if (error) |
| 1743 | goto out_unlock; |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1744 | error = xfs_swap_extent_flush(tip); |
| 1745 | if (error) |
| 1746 | goto out_unlock; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1747 | |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1748 | tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT); |
| 1749 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
| 1750 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1751 | xfs_trans_cancel(tp); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1752 | goto out_unlock; |
| 1753 | } |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1754 | |
| 1755 | /* |
| 1756 | * Lock and join the inodes to the tansaction so that transaction commit |
| 1757 | * or cancel will unlock the inodes from this point onwards. |
| 1758 | */ |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1759 | xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); |
| 1760 | lock_flags |= XFS_ILOCK_EXCL; |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1761 | xfs_trans_ijoin(tp, ip, lock_flags); |
| 1762 | xfs_trans_ijoin(tp, tip, lock_flags); |
| 1763 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1764 | |
| 1765 | /* Verify all data are being swapped */ |
| 1766 | if (sxp->sx_offset != 0 || |
| 1767 | sxp->sx_length != ip->i_d.di_size || |
| 1768 | sxp->sx_length != tip->i_d.di_size) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1769 | error = -EFAULT; |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1770 | goto out_trans_cancel; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1771 | } |
| 1772 | |
| 1773 | trace_xfs_swap_extent_before(ip, 0); |
| 1774 | trace_xfs_swap_extent_before(tip, 1); |
| 1775 | |
| 1776 | /* check inode formats now that data is flushed */ |
| 1777 | error = xfs_swap_extents_check_format(ip, tip); |
| 1778 | if (error) { |
| 1779 | xfs_notice(mp, |
| 1780 | "%s: inode 0x%llx format is incompatible for exchanging.", |
| 1781 | __func__, ip->i_ino); |
Dave Chinner | 4ef897a | 2014-08-04 13:44:08 +1000 | [diff] [blame] | 1782 | goto out_trans_cancel; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1783 | } |
| 1784 | |
| 1785 | /* |
| 1786 | * Compare the current change & modify times with that |
| 1787 | * passed in. If they differ, we abort this swap. |
| 1788 | * This is the mechanism used to ensure the calling |
| 1789 | * process that the file was not changed out from |
| 1790 | * under it. |
| 1791 | */ |
| 1792 | if ((sbp->bs_ctime.tv_sec != VFS_I(ip)->i_ctime.tv_sec) || |
| 1793 | (sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) || |
| 1794 | (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) || |
| 1795 | (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1796 | error = -EBUSY; |
Dave Chinner | 8121768 | 2014-08-04 13:29:32 +1000 | [diff] [blame] | 1797 | goto out_trans_cancel; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1798 | } |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1799 | /* |
| 1800 | * Count the number of extended attribute blocks |
| 1801 | */ |
| 1802 | if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) && |
| 1803 | (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { |
| 1804 | error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks); |
| 1805 | if (error) |
| 1806 | goto out_trans_cancel; |
| 1807 | } |
| 1808 | if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) && |
| 1809 | (tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { |
| 1810 | error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK, |
| 1811 | &taforkblks); |
| 1812 | if (error) |
| 1813 | goto out_trans_cancel; |
| 1814 | } |
| 1815 | |
Dave Chinner | 21b5c97 | 2013-08-30 10:23:44 +1000 | [diff] [blame] | 1816 | /* |
| 1817 | * Before we've swapped the forks, lets set the owners of the forks |
| 1818 | * appropriately. We have to do this as we are demand paging the btree |
| 1819 | * buffers, and so the validation done on read will expect the owner |
| 1820 | * field to be correctly set. Once we change the owners, we can swap the |
| 1821 | * inode forks. |
| 1822 | * |
| 1823 | * Note the trickiness in setting the log flags - we set the owner log |
| 1824 | * flag on the opposite inode (i.e. the inode we are setting the new |
| 1825 | * owner to be) because once we swap the forks and log that, log |
| 1826 | * recovery is going to see the fork as owned by the swapped inode, |
| 1827 | * not the pre-swapped inodes. |
| 1828 | */ |
| 1829 | src_log_flags = XFS_ILOG_CORE; |
| 1830 | target_log_flags = XFS_ILOG_CORE; |
| 1831 | if (ip->i_d.di_version == 3 && |
| 1832 | ip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
Dave Chinner | 638f4416 | 2013-08-30 10:23:45 +1000 | [diff] [blame] | 1833 | target_log_flags |= XFS_ILOG_DOWNER; |
| 1834 | error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK, |
| 1835 | tip->i_ino, NULL); |
Dave Chinner | 21b5c97 | 2013-08-30 10:23:44 +1000 | [diff] [blame] | 1836 | if (error) |
| 1837 | goto out_trans_cancel; |
| 1838 | } |
| 1839 | |
| 1840 | if (tip->i_d.di_version == 3 && |
| 1841 | tip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
Dave Chinner | 638f4416 | 2013-08-30 10:23:45 +1000 | [diff] [blame] | 1842 | src_log_flags |= XFS_ILOG_DOWNER; |
| 1843 | error = xfs_bmbt_change_owner(tp, tip, XFS_DATA_FORK, |
| 1844 | ip->i_ino, NULL); |
Dave Chinner | 21b5c97 | 2013-08-30 10:23:44 +1000 | [diff] [blame] | 1845 | if (error) |
| 1846 | goto out_trans_cancel; |
| 1847 | } |
| 1848 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1849 | /* |
| 1850 | * Swap the data forks of the inodes |
| 1851 | */ |
| 1852 | ifp = &ip->i_df; |
| 1853 | tifp = &tip->i_df; |
| 1854 | *tempifp = *ifp; /* struct copy */ |
| 1855 | *ifp = *tifp; /* struct copy */ |
| 1856 | *tifp = *tempifp; /* struct copy */ |
| 1857 | |
| 1858 | /* |
| 1859 | * Fix the on-disk inode values |
| 1860 | */ |
| 1861 | tmp = (__uint64_t)ip->i_d.di_nblocks; |
| 1862 | ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks; |
| 1863 | tip->i_d.di_nblocks = tmp + taforkblks - aforkblks; |
| 1864 | |
| 1865 | tmp = (__uint64_t) ip->i_d.di_nextents; |
| 1866 | ip->i_d.di_nextents = tip->i_d.di_nextents; |
| 1867 | tip->i_d.di_nextents = tmp; |
| 1868 | |
| 1869 | tmp = (__uint64_t) ip->i_d.di_format; |
| 1870 | ip->i_d.di_format = tip->i_d.di_format; |
| 1871 | tip->i_d.di_format = tmp; |
| 1872 | |
| 1873 | /* |
| 1874 | * The extents in the source inode could still contain speculative |
| 1875 | * preallocation beyond EOF (e.g. the file is open but not modified |
| 1876 | * while defrag is in progress). In that case, we need to copy over the |
| 1877 | * number of delalloc blocks the data fork in the source inode is |
| 1878 | * tracking beyond EOF so that when the fork is truncated away when the |
| 1879 | * temporary inode is unlinked we don't underrun the i_delayed_blks |
| 1880 | * counter on that inode. |
| 1881 | */ |
| 1882 | ASSERT(tip->i_delayed_blks == 0); |
| 1883 | tip->i_delayed_blks = ip->i_delayed_blks; |
| 1884 | ip->i_delayed_blks = 0; |
| 1885 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1886 | switch (ip->i_d.di_format) { |
| 1887 | case XFS_DINODE_FMT_EXTENTS: |
| 1888 | /* If the extents fit in the inode, fix the |
| 1889 | * pointer. Otherwise it's already NULL or |
| 1890 | * pointing to the extent. |
| 1891 | */ |
| 1892 | if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) { |
| 1893 | ifp->if_u1.if_extents = |
| 1894 | ifp->if_u2.if_inline_ext; |
| 1895 | } |
| 1896 | src_log_flags |= XFS_ILOG_DEXT; |
| 1897 | break; |
| 1898 | case XFS_DINODE_FMT_BTREE: |
Dave Chinner | 21b5c97 | 2013-08-30 10:23:44 +1000 | [diff] [blame] | 1899 | ASSERT(ip->i_d.di_version < 3 || |
Dave Chinner | 638f4416 | 2013-08-30 10:23:45 +1000 | [diff] [blame] | 1900 | (src_log_flags & XFS_ILOG_DOWNER)); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1901 | src_log_flags |= XFS_ILOG_DBROOT; |
| 1902 | break; |
| 1903 | } |
| 1904 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1905 | switch (tip->i_d.di_format) { |
| 1906 | case XFS_DINODE_FMT_EXTENTS: |
| 1907 | /* If the extents fit in the inode, fix the |
| 1908 | * pointer. Otherwise it's already NULL or |
| 1909 | * pointing to the extent. |
| 1910 | */ |
| 1911 | if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) { |
| 1912 | tifp->if_u1.if_extents = |
| 1913 | tifp->if_u2.if_inline_ext; |
| 1914 | } |
| 1915 | target_log_flags |= XFS_ILOG_DEXT; |
| 1916 | break; |
| 1917 | case XFS_DINODE_FMT_BTREE: |
| 1918 | target_log_flags |= XFS_ILOG_DBROOT; |
Dave Chinner | 21b5c97 | 2013-08-30 10:23:44 +1000 | [diff] [blame] | 1919 | ASSERT(tip->i_d.di_version < 3 || |
Dave Chinner | 638f4416 | 2013-08-30 10:23:45 +1000 | [diff] [blame] | 1920 | (target_log_flags & XFS_ILOG_DOWNER)); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1921 | break; |
| 1922 | } |
| 1923 | |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1924 | xfs_trans_log_inode(tp, ip, src_log_flags); |
| 1925 | xfs_trans_log_inode(tp, tip, target_log_flags); |
| 1926 | |
| 1927 | /* |
| 1928 | * If this is a synchronous mount, make sure that the |
| 1929 | * transaction goes to disk before returning to the user. |
| 1930 | */ |
| 1931 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 1932 | xfs_trans_set_sync(tp); |
| 1933 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1934 | error = xfs_trans_commit(tp); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1935 | |
| 1936 | trace_xfs_swap_extent_after(ip, 0); |
| 1937 | trace_xfs_swap_extent_after(tip, 1); |
| 1938 | out: |
| 1939 | kmem_free(tempifp); |
| 1940 | return error; |
| 1941 | |
| 1942 | out_unlock: |
Dave Chinner | 8121768 | 2014-08-04 13:29:32 +1000 | [diff] [blame] | 1943 | xfs_iunlock(ip, lock_flags); |
| 1944 | xfs_iunlock(tip, lock_flags); |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1945 | goto out; |
| 1946 | |
| 1947 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 1948 | xfs_trans_cancel(tp); |
Dave Chinner | 723cac4 | 2015-02-23 21:47:29 +1100 | [diff] [blame] | 1949 | goto out; |
Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 1950 | } |