1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_trans.h" 15 #include "xfs_inode_item.h" 16 #include "xfs_trace.h" 17 #include "xfs_trans_priv.h" 18 #include "xfs_buf_item.h" 19 #include "xfs_log.h" 20 #include "xfs_error.h" 21 #include "xfs_log_priv.h" 22 #include "xfs_log_recover.h" 23 #include "xfs_icache.h" 24 #include "xfs_bmap_btree.h" 25 26 STATIC void 27 xlog_recover_inode_ra_pass2( 28 struct xlog *log, 29 struct xlog_recover_item *item) 30 { 31 if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) { 32 struct xfs_inode_log_format *ilfp = item->ri_buf[0].i_addr; 33 34 xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len, 35 &xfs_inode_buf_ra_ops); 36 } else { 37 struct xfs_inode_log_format_32 *ilfp = item->ri_buf[0].i_addr; 38 39 xlog_buf_readahead(log, ilfp->ilf_blkno, ilfp->ilf_len, 40 &xfs_inode_buf_ra_ops); 41 } 42 } 43 44 /* 45 * Inode fork owner changes 46 * 47 * If we have been told that we have to reparent the inode fork, it's because an 48 * extent swap operation on a CRC enabled filesystem has been done and we are 49 * replaying it. We need to walk the BMBT of the appropriate fork and change the 50 * owners of it. 51 * 52 * The complexity here is that we don't have an inode context to work with, so 53 * after we've replayed the inode we need to instantiate one. This is where the 54 * fun begins. 55 * 56 * We are in the middle of log recovery, so we can't run transactions. That 57 * means we cannot use cache coherent inode instantiation via xfs_iget(), as 58 * that will result in the corresponding iput() running the inode through 59 * xfs_inactive(). If we've just replayed an inode core that changes the link 60 * count to zero (i.e. it's been unlinked), then xfs_inactive() will run 61 * transactions (bad!). 62 * 63 * So, to avoid this, we instantiate an inode directly from the inode core we've 64 * just recovered. We have the buffer still locked, and all we really need to 65 * instantiate is the inode core and the forks being modified. We can do this 66 * manually, then run the inode btree owner change, and then tear down the 67 * xfs_inode without having to run any transactions at all. 68 * 69 * Also, because we don't have a transaction context available here but need to 70 * gather all the buffers we modify for writeback so we pass the buffer_list 71 * instead for the operation to use. 72 */ 73 74 STATIC int 75 xfs_recover_inode_owner_change( 76 struct xfs_mount *mp, 77 struct xfs_dinode *dip, 78 struct xfs_inode_log_format *in_f, 79 struct list_head *buffer_list) 80 { 81 struct xfs_inode *ip; 82 int error; 83 84 ASSERT(in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)); 85 86 ip = xfs_inode_alloc(mp, in_f->ilf_ino); 87 if (!ip) 88 return -ENOMEM; 89 90 /* instantiate the inode */ 91 ASSERT(dip->di_version >= 3); 92 93 error = xfs_inode_from_disk(ip, dip); 94 if (error) 95 goto out_free_ip; 96 97 if (in_f->ilf_fields & XFS_ILOG_DOWNER) { 98 ASSERT(in_f->ilf_fields & XFS_ILOG_DBROOT); 99 error = xfs_bmbt_change_owner(NULL, ip, XFS_DATA_FORK, 100 ip->i_ino, buffer_list); 101 if (error) 102 goto out_free_ip; 103 } 104 105 if (in_f->ilf_fields & XFS_ILOG_AOWNER) { 106 ASSERT(in_f->ilf_fields & XFS_ILOG_ABROOT); 107 error = xfs_bmbt_change_owner(NULL, ip, XFS_ATTR_FORK, 108 ip->i_ino, buffer_list); 109 if (error) 110 goto out_free_ip; 111 } 112 113 out_free_ip: 114 xfs_inode_free(ip); 115 return error; 116 } 117 118 STATIC int 119 xlog_recover_inode_commit_pass2( 120 struct xlog *log, 121 struct list_head *buffer_list, 122 struct xlog_recover_item *item, 123 xfs_lsn_t current_lsn) 124 { 125 struct xfs_inode_log_format *in_f; 126 struct xfs_mount *mp = log->l_mp; 127 struct xfs_buf *bp; 128 struct xfs_dinode *dip; 129 int len; 130 char *src; 131 char *dest; 132 int error; 133 int attr_index; 134 uint fields; 135 struct xfs_log_dinode *ldip; 136 uint isize; 137 int need_free = 0; 138 139 if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) { 140 in_f = item->ri_buf[0].i_addr; 141 } else { 142 in_f = kmem_alloc(sizeof(struct xfs_inode_log_format), 0); 143 need_free = 1; 144 error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); 145 if (error) 146 goto error; 147 } 148 149 /* 150 * Inode buffers can be freed, look out for it, 151 * and do not replay the inode. 152 */ 153 if (xlog_is_buffer_cancelled(log, in_f->ilf_blkno, in_f->ilf_len)) { 154 error = 0; 155 trace_xfs_log_recover_inode_cancel(log, in_f); 156 goto error; 157 } 158 trace_xfs_log_recover_inode_recover(log, in_f); 159 160 error = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 161 0, &bp, &xfs_inode_buf_ops); 162 if (error) 163 goto error; 164 ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); 165 dip = xfs_buf_offset(bp, in_f->ilf_boffset); 166 167 /* 168 * Make sure the place we're flushing out to really looks 169 * like an inode! 170 */ 171 if (XFS_IS_CORRUPT(mp, !xfs_verify_magic16(bp, dip->di_magic))) { 172 xfs_alert(mp, 173 "%s: Bad inode magic number, dip = "PTR_FMT", dino bp = "PTR_FMT", ino = %Ld", 174 __func__, dip, bp, in_f->ilf_ino); 175 error = -EFSCORRUPTED; 176 goto out_release; 177 } 178 ldip = item->ri_buf[1].i_addr; 179 if (XFS_IS_CORRUPT(mp, ldip->di_magic != XFS_DINODE_MAGIC)) { 180 xfs_alert(mp, 181 "%s: Bad inode log record, rec ptr "PTR_FMT", ino %Ld", 182 __func__, item, in_f->ilf_ino); 183 error = -EFSCORRUPTED; 184 goto out_release; 185 } 186 187 /* 188 * If the inode has an LSN in it, recover the inode only if it's less 189 * than the lsn of the transaction we are replaying. Note: we still 190 * need to replay an owner change even though the inode is more recent 191 * than the transaction as there is no guarantee that all the btree 192 * blocks are more recent than this transaction, too. 193 */ 194 if (dip->di_version >= 3) { 195 xfs_lsn_t lsn = be64_to_cpu(dip->di_lsn); 196 197 if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) { 198 trace_xfs_log_recover_inode_skip(log, in_f); 199 error = 0; 200 goto out_owner_change; 201 } 202 } 203 204 /* 205 * di_flushiter is only valid for v1/2 inodes. All changes for v3 inodes 206 * are transactional and if ordering is necessary we can determine that 207 * more accurately by the LSN field in the V3 inode core. Don't trust 208 * the inode versions we might be changing them here - use the 209 * superblock flag to determine whether we need to look at di_flushiter 210 * to skip replay when the on disk inode is newer than the log one 211 */ 212 if (!xfs_sb_version_has_v3inode(&mp->m_sb) && 213 ldip->di_flushiter < be16_to_cpu(dip->di_flushiter)) { 214 /* 215 * Deal with the wrap case, DI_MAX_FLUSH is less 216 * than smaller numbers 217 */ 218 if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && 219 ldip->di_flushiter < (DI_MAX_FLUSH >> 1)) { 220 /* do nothing */ 221 } else { 222 trace_xfs_log_recover_inode_skip(log, in_f); 223 error = 0; 224 goto out_release; 225 } 226 } 227 228 /* Take the opportunity to reset the flush iteration count */ 229 ldip->di_flushiter = 0; 230 231 if (unlikely(S_ISREG(ldip->di_mode))) { 232 if ((ldip->di_format != XFS_DINODE_FMT_EXTENTS) && 233 (ldip->di_format != XFS_DINODE_FMT_BTREE)) { 234 XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", 235 XFS_ERRLEVEL_LOW, mp, ldip, 236 sizeof(*ldip)); 237 xfs_alert(mp, 238 "%s: Bad regular inode log record, rec ptr "PTR_FMT", " 239 "ino ptr = "PTR_FMT", ino bp = "PTR_FMT", ino %Ld", 240 __func__, item, dip, bp, in_f->ilf_ino); 241 error = -EFSCORRUPTED; 242 goto out_release; 243 } 244 } else if (unlikely(S_ISDIR(ldip->di_mode))) { 245 if ((ldip->di_format != XFS_DINODE_FMT_EXTENTS) && 246 (ldip->di_format != XFS_DINODE_FMT_BTREE) && 247 (ldip->di_format != XFS_DINODE_FMT_LOCAL)) { 248 XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", 249 XFS_ERRLEVEL_LOW, mp, ldip, 250 sizeof(*ldip)); 251 xfs_alert(mp, 252 "%s: Bad dir inode log record, rec ptr "PTR_FMT", " 253 "ino ptr = "PTR_FMT", ino bp = "PTR_FMT", ino %Ld", 254 __func__, item, dip, bp, in_f->ilf_ino); 255 error = -EFSCORRUPTED; 256 goto out_release; 257 } 258 } 259 if (unlikely(ldip->di_nextents + ldip->di_anextents > ldip->di_nblocks)){ 260 XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", 261 XFS_ERRLEVEL_LOW, mp, ldip, 262 sizeof(*ldip)); 263 xfs_alert(mp, 264 "%s: Bad inode log record, rec ptr "PTR_FMT", dino ptr "PTR_FMT", " 265 "dino bp "PTR_FMT", ino %Ld, total extents = %d, nblocks = %Ld", 266 __func__, item, dip, bp, in_f->ilf_ino, 267 ldip->di_nextents + ldip->di_anextents, 268 ldip->di_nblocks); 269 error = -EFSCORRUPTED; 270 goto out_release; 271 } 272 if (unlikely(ldip->di_forkoff > mp->m_sb.sb_inodesize)) { 273 XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", 274 XFS_ERRLEVEL_LOW, mp, ldip, 275 sizeof(*ldip)); 276 xfs_alert(mp, 277 "%s: Bad inode log record, rec ptr "PTR_FMT", dino ptr "PTR_FMT", " 278 "dino bp "PTR_FMT", ino %Ld, forkoff 0x%x", __func__, 279 item, dip, bp, in_f->ilf_ino, ldip->di_forkoff); 280 error = -EFSCORRUPTED; 281 goto out_release; 282 } 283 isize = xfs_log_dinode_size(mp); 284 if (unlikely(item->ri_buf[1].i_len > isize)) { 285 XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", 286 XFS_ERRLEVEL_LOW, mp, ldip, 287 sizeof(*ldip)); 288 xfs_alert(mp, 289 "%s: Bad inode log record length %d, rec ptr "PTR_FMT, 290 __func__, item->ri_buf[1].i_len, item); 291 error = -EFSCORRUPTED; 292 goto out_release; 293 } 294 295 /* recover the log dinode inode into the on disk inode */ 296 xfs_log_dinode_to_disk(ldip, dip); 297 298 fields = in_f->ilf_fields; 299 if (fields & XFS_ILOG_DEV) 300 xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); 301 302 if (in_f->ilf_size == 2) 303 goto out_owner_change; 304 len = item->ri_buf[2].i_len; 305 src = item->ri_buf[2].i_addr; 306 ASSERT(in_f->ilf_size <= 4); 307 ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); 308 ASSERT(!(fields & XFS_ILOG_DFORK) || 309 (len == in_f->ilf_dsize)); 310 311 switch (fields & XFS_ILOG_DFORK) { 312 case XFS_ILOG_DDATA: 313 case XFS_ILOG_DEXT: 314 memcpy(XFS_DFORK_DPTR(dip), src, len); 315 break; 316 317 case XFS_ILOG_DBROOT: 318 xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, 319 (struct xfs_bmdr_block *)XFS_DFORK_DPTR(dip), 320 XFS_DFORK_DSIZE(dip, mp)); 321 break; 322 323 default: 324 /* 325 * There are no data fork flags set. 326 */ 327 ASSERT((fields & XFS_ILOG_DFORK) == 0); 328 break; 329 } 330 331 /* 332 * If we logged any attribute data, recover it. There may or 333 * may not have been any other non-core data logged in this 334 * transaction. 335 */ 336 if (in_f->ilf_fields & XFS_ILOG_AFORK) { 337 if (in_f->ilf_fields & XFS_ILOG_DFORK) { 338 attr_index = 3; 339 } else { 340 attr_index = 2; 341 } 342 len = item->ri_buf[attr_index].i_len; 343 src = item->ri_buf[attr_index].i_addr; 344 ASSERT(len == in_f->ilf_asize); 345 346 switch (in_f->ilf_fields & XFS_ILOG_AFORK) { 347 case XFS_ILOG_ADATA: 348 case XFS_ILOG_AEXT: 349 dest = XFS_DFORK_APTR(dip); 350 ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); 351 memcpy(dest, src, len); 352 break; 353 354 case XFS_ILOG_ABROOT: 355 dest = XFS_DFORK_APTR(dip); 356 xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, 357 len, (struct xfs_bmdr_block *)dest, 358 XFS_DFORK_ASIZE(dip, mp)); 359 break; 360 361 default: 362 xfs_warn(log->l_mp, "%s: Invalid flag", __func__); 363 ASSERT(0); 364 error = -EFSCORRUPTED; 365 goto out_release; 366 } 367 } 368 369 out_owner_change: 370 /* Recover the swapext owner change unless inode has been deleted */ 371 if ((in_f->ilf_fields & (XFS_ILOG_DOWNER|XFS_ILOG_AOWNER)) && 372 (dip->di_mode != 0)) 373 error = xfs_recover_inode_owner_change(mp, dip, in_f, 374 buffer_list); 375 /* re-generate the checksum. */ 376 xfs_dinode_calc_crc(log->l_mp, dip); 377 378 ASSERT(bp->b_mount == mp); 379 bp->b_flags |= _XBF_LOGRECOVERY; 380 xfs_buf_delwri_queue(bp, buffer_list); 381 382 out_release: 383 xfs_buf_relse(bp); 384 error: 385 if (need_free) 386 kmem_free(in_f); 387 return error; 388 } 389 390 const struct xlog_recover_item_ops xlog_inode_item_ops = { 391 .item_type = XFS_LI_INODE, 392 .ra_pass2 = xlog_recover_inode_ra_pass2, 393 .commit_pass2 = xlog_recover_inode_commit_pass2, 394 }; 395