| /* |
| * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_types.h" |
| #include "xfs_bit.h" |
| #include "xfs_log.h" |
| #include "xfs_inum.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_dir.h" |
| #include "xfs_dir2.h" |
| #include "xfs_dmapi.h" |
| #include "xfs_mount.h" |
| #include "xfs_error.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_dir_sf.h" |
| #include "xfs_dir2_sf.h" |
| #include "xfs_attr_sf.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_imap.h" |
| #include "xfs_alloc.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_log_priv.h" |
| #include "xfs_buf_item.h" |
| #include "xfs_log_recover.h" |
| #include "xfs_extfree_item.h" |
| #include "xfs_trans_priv.h" |
| #include "xfs_quota.h" |
| #include "xfs_rw.h" |
| |
| STATIC int xlog_find_zeroed(xlog_t *, xfs_daddr_t *); |
| STATIC int xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t); |
| STATIC void xlog_recover_insert_item_backq(xlog_recover_item_t **q, |
| xlog_recover_item_t *item); |
| #if defined(DEBUG) |
| STATIC void xlog_recover_check_summary(xlog_t *); |
| STATIC void xlog_recover_check_ail(xfs_mount_t *, xfs_log_item_t *, int); |
| #else |
| #define xlog_recover_check_summary(log) |
| #define xlog_recover_check_ail(mp, lip, gen) |
| #endif |
| |
| |
| /* |
| * Sector aligned buffer routines for buffer create/read/write/access |
| */ |
| |
| #define XLOG_SECTOR_ROUNDUP_BBCOUNT(log, bbs) \ |
| ( ((log)->l_sectbb_mask && (bbs & (log)->l_sectbb_mask)) ? \ |
| ((bbs + (log)->l_sectbb_mask + 1) & ~(log)->l_sectbb_mask) : (bbs) ) |
| #define XLOG_SECTOR_ROUNDDOWN_BLKNO(log, bno) ((bno) & ~(log)->l_sectbb_mask) |
| |
| xfs_buf_t * |
| xlog_get_bp( |
| xlog_t *log, |
| int num_bblks) |
| { |
| ASSERT(num_bblks > 0); |
| |
| if (log->l_sectbb_log) { |
| if (num_bblks > 1) |
| num_bblks += XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1); |
| num_bblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, num_bblks); |
| } |
| return xfs_buf_get_noaddr(BBTOB(num_bblks), log->l_mp->m_logdev_targp); |
| } |
| |
| void |
| xlog_put_bp( |
| xfs_buf_t *bp) |
| { |
| xfs_buf_free(bp); |
| } |
| |
| |
| /* |
| * nbblks should be uint, but oh well. Just want to catch that 32-bit length. |
| */ |
| int |
| xlog_bread( |
| xlog_t *log, |
| xfs_daddr_t blk_no, |
| int nbblks, |
| xfs_buf_t *bp) |
| { |
| int error; |
| |
| if (log->l_sectbb_log) { |
| blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no); |
| nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks); |
| } |
| |
| ASSERT(nbblks > 0); |
| ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); |
| ASSERT(bp); |
| |
| XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); |
| XFS_BUF_READ(bp); |
| XFS_BUF_BUSY(bp); |
| XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); |
| XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp); |
| |
| xfsbdstrat(log->l_mp, bp); |
| if ((error = xfs_iowait(bp))) |
| xfs_ioerror_alert("xlog_bread", log->l_mp, |
| bp, XFS_BUF_ADDR(bp)); |
| return error; |
| } |
| |
| /* |
| * Write out the buffer at the given block for the given number of blocks. |
| * The buffer is kept locked across the write and is returned locked. |
| * This can only be used for synchronous log writes. |
| */ |
| STATIC int |
| xlog_bwrite( |
| xlog_t *log, |
| xfs_daddr_t blk_no, |
| int nbblks, |
| xfs_buf_t *bp) |
| { |
| int error; |
| |
| if (log->l_sectbb_log) { |
| blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no); |
| nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks); |
| } |
| |
| ASSERT(nbblks > 0); |
| ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); |
| |
| XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); |
| XFS_BUF_ZEROFLAGS(bp); |
| XFS_BUF_BUSY(bp); |
| XFS_BUF_HOLD(bp); |
| XFS_BUF_PSEMA(bp, PRIBIO); |
| XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); |
| XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp); |
| |
| if ((error = xfs_bwrite(log->l_mp, bp))) |
| xfs_ioerror_alert("xlog_bwrite", log->l_mp, |
| bp, XFS_BUF_ADDR(bp)); |
| return error; |
| } |
| |
| STATIC xfs_caddr_t |
| xlog_align( |
| xlog_t *log, |
| xfs_daddr_t blk_no, |
| int nbblks, |
| xfs_buf_t *bp) |
| { |
| xfs_caddr_t ptr; |
| |
| if (!log->l_sectbb_log) |
| return XFS_BUF_PTR(bp); |
| |
| ptr = XFS_BUF_PTR(bp) + BBTOB((int)blk_no & log->l_sectbb_mask); |
| ASSERT(XFS_BUF_SIZE(bp) >= |
| BBTOB(nbblks + (blk_no & log->l_sectbb_mask))); |
| return ptr; |
| } |
| |
| #ifdef DEBUG |
| /* |
| * dump debug superblock and log record information |
| */ |
| STATIC void |
| xlog_header_check_dump( |
| xfs_mount_t *mp, |
| xlog_rec_header_t *head) |
| { |
| int b; |
| |
| printk("%s: SB : uuid = ", __FUNCTION__); |
| for (b = 0; b < 16; b++) |
| printk("%02x",((unsigned char *)&mp->m_sb.sb_uuid)[b]); |
| printk(", fmt = %d\n", XLOG_FMT); |
| printk(" log : uuid = "); |
| for (b = 0; b < 16; b++) |
| printk("%02x",((unsigned char *)&head->h_fs_uuid)[b]); |
| printk(", fmt = %d\n", INT_GET(head->h_fmt, ARCH_CONVERT)); |
| } |
| #else |
| #define xlog_header_check_dump(mp, head) |
| #endif |
| |
| /* |
| * check log record header for recovery |
| */ |
| STATIC int |
| xlog_header_check_recover( |
| xfs_mount_t *mp, |
| xlog_rec_header_t *head) |
| { |
| ASSERT(INT_GET(head->h_magicno, ARCH_CONVERT) == XLOG_HEADER_MAGIC_NUM); |
| |
| /* |
| * IRIX doesn't write the h_fmt field and leaves it zeroed |
| * (XLOG_FMT_UNKNOWN). This stops us from trying to recover |
| * a dirty log created in IRIX. |
| */ |
| if (unlikely(INT_GET(head->h_fmt, ARCH_CONVERT) != XLOG_FMT)) { |
| xlog_warn( |
| "XFS: dirty log written in incompatible format - can't recover"); |
| xlog_header_check_dump(mp, head); |
| XFS_ERROR_REPORT("xlog_header_check_recover(1)", |
| XFS_ERRLEVEL_HIGH, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
| xlog_warn( |
| "XFS: dirty log entry has mismatched uuid - can't recover"); |
| xlog_header_check_dump(mp, head); |
| XFS_ERROR_REPORT("xlog_header_check_recover(2)", |
| XFS_ERRLEVEL_HIGH, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| return 0; |
| } |
| |
| /* |
| * read the head block of the log and check the header |
| */ |
| STATIC int |
| xlog_header_check_mount( |
| xfs_mount_t *mp, |
| xlog_rec_header_t *head) |
| { |
| ASSERT(INT_GET(head->h_magicno, ARCH_CONVERT) == XLOG_HEADER_MAGIC_NUM); |
| |
| if (uuid_is_nil(&head->h_fs_uuid)) { |
| /* |
| * IRIX doesn't write the h_fs_uuid or h_fmt fields. If |
| * h_fs_uuid is nil, we assume this log was last mounted |
| * by IRIX and continue. |
| */ |
| xlog_warn("XFS: nil uuid in log - IRIX style log"); |
| } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
| xlog_warn("XFS: log has mismatched uuid - can't recover"); |
| xlog_header_check_dump(mp, head); |
| XFS_ERROR_REPORT("xlog_header_check_mount", |
| XFS_ERRLEVEL_HIGH, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| return 0; |
| } |
| |
| STATIC void |
| xlog_recover_iodone( |
| struct xfs_buf *bp) |
| { |
| xfs_mount_t *mp; |
| |
| ASSERT(XFS_BUF_FSPRIVATE(bp, void *)); |
| |
| if (XFS_BUF_GETERROR(bp)) { |
| /* |
| * We're not going to bother about retrying |
| * this during recovery. One strike! |
| */ |
| mp = XFS_BUF_FSPRIVATE(bp, xfs_mount_t *); |
| xfs_ioerror_alert("xlog_recover_iodone", |
| mp, bp, XFS_BUF_ADDR(bp)); |
| xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR); |
| } |
| XFS_BUF_SET_FSPRIVATE(bp, NULL); |
| XFS_BUF_CLR_IODONE_FUNC(bp); |
| xfs_biodone(bp); |
| } |
| |
| /* |
| * This routine finds (to an approximation) the first block in the physical |
| * log which contains the given cycle. It uses a binary search algorithm. |
| * Note that the algorithm can not be perfect because the disk will not |
| * necessarily be perfect. |
| */ |
| int |
| xlog_find_cycle_start( |
| xlog_t *log, |
| xfs_buf_t *bp, |
| xfs_daddr_t first_blk, |
| xfs_daddr_t *last_blk, |
| uint cycle) |
| { |
| xfs_caddr_t offset; |
| xfs_daddr_t mid_blk; |
| uint mid_cycle; |
| int error; |
| |
| mid_blk = BLK_AVG(first_blk, *last_blk); |
| while (mid_blk != first_blk && mid_blk != *last_blk) { |
| if ((error = xlog_bread(log, mid_blk, 1, bp))) |
| return error; |
| offset = xlog_align(log, mid_blk, 1, bp); |
| mid_cycle = GET_CYCLE(offset, ARCH_CONVERT); |
| if (mid_cycle == cycle) { |
| *last_blk = mid_blk; |
| /* last_half_cycle == mid_cycle */ |
| } else { |
| first_blk = mid_blk; |
| /* first_half_cycle == mid_cycle */ |
| } |
| mid_blk = BLK_AVG(first_blk, *last_blk); |
| } |
| ASSERT((mid_blk == first_blk && mid_blk+1 == *last_blk) || |
| (mid_blk == *last_blk && mid_blk-1 == first_blk)); |
| |
| return 0; |
| } |
| |
| /* |
| * Check that the range of blocks does not contain the cycle number |
| * given. The scan needs to occur from front to back and the ptr into the |
| * region must be updated since a later routine will need to perform another |
| * test. If the region is completely good, we end up returning the same |
| * last block number. |
| * |
| * Set blkno to -1 if we encounter no errors. This is an invalid block number |
| * since we don't ever expect logs to get this large. |
| */ |
| STATIC int |
| xlog_find_verify_cycle( |
| xlog_t *log, |
| xfs_daddr_t start_blk, |
| int nbblks, |
| uint stop_on_cycle_no, |
| xfs_daddr_t *new_blk) |
| { |
| xfs_daddr_t i, j; |
| uint cycle; |
| xfs_buf_t *bp; |
| xfs_daddr_t bufblks; |
| xfs_caddr_t buf = NULL; |
| int error = 0; |
| |
| bufblks = 1 << ffs(nbblks); |
| |
| while (!(bp = xlog_get_bp(log, bufblks))) { |
| /* can't get enough memory to do everything in one big buffer */ |
| bufblks >>= 1; |
| if (bufblks <= log->l_sectbb_log) |
| return ENOMEM; |
| } |
| |
| for (i = start_blk; i < start_blk + nbblks; i += bufblks) { |
| int bcount; |
| |
| bcount = min(bufblks, (start_blk + nbblks - i)); |
| |
| if ((error = xlog_bread(log, i, bcount, bp))) |
| goto out; |
| |
| buf = xlog_align(log, i, bcount, bp); |
| for (j = 0; j < bcount; j++) { |
| cycle = GET_CYCLE(buf, ARCH_CONVERT); |
| if (cycle == stop_on_cycle_no) { |
| *new_blk = i+j; |
| goto out; |
| } |
| |
| buf += BBSIZE; |
| } |
| } |
| |
| *new_blk = -1; |
| |
| out: |
| xlog_put_bp(bp); |
| return error; |
| } |
| |
| /* |
| * Potentially backup over partial log record write. |
| * |
| * In the typical case, last_blk is the number of the block directly after |
| * a good log record. Therefore, we subtract one to get the block number |
| * of the last block in the given buffer. extra_bblks contains the number |
| * of blocks we would have read on a previous read. This happens when the |
| * last log record is split over the end of the physical log. |
| * |
| * extra_bblks is the number of blocks potentially verified on a previous |
| * call to this routine. |
| */ |
| STATIC int |
| xlog_find_verify_log_record( |
| xlog_t *log, |
| xfs_daddr_t start_blk, |
| xfs_daddr_t *last_blk, |
| int extra_bblks) |
| { |
| xfs_daddr_t i; |
| xfs_buf_t *bp; |
| xfs_caddr_t offset = NULL; |
| xlog_rec_header_t *head = NULL; |
| int error = 0; |
| int smallmem = 0; |
| int num_blks = *last_blk - start_blk; |
| int xhdrs; |
| |
| ASSERT(start_blk != 0 || *last_blk != start_blk); |
| |
| if (!(bp = xlog_get_bp(log, num_blks))) { |
| if (!(bp = xlog_get_bp(log, 1))) |
| return ENOMEM; |
| smallmem = 1; |
| } else { |
| if ((error = xlog_bread(log, start_blk, num_blks, bp))) |
| goto out; |
| offset = xlog_align(log, start_blk, num_blks, bp); |
| offset += ((num_blks - 1) << BBSHIFT); |
| } |
| |
| for (i = (*last_blk) - 1; i >= 0; i--) { |
| if (i < start_blk) { |
| /* valid log record not found */ |
| xlog_warn( |
| "XFS: Log inconsistent (didn't find previous header)"); |
| ASSERT(0); |
| error = XFS_ERROR(EIO); |
| goto out; |
| } |
| |
| if (smallmem) { |
| if ((error = xlog_bread(log, i, 1, bp))) |
| goto out; |
| offset = xlog_align(log, i, 1, bp); |
| } |
| |
| head = (xlog_rec_header_t *)offset; |
| |
| if (XLOG_HEADER_MAGIC_NUM == |
| INT_GET(head->h_magicno, ARCH_CONVERT)) |
| break; |
| |
| if (!smallmem) |
| offset -= BBSIZE; |
| } |
| |
| /* |
| * We hit the beginning of the physical log & still no header. Return |
| * to caller. If caller can handle a return of -1, then this routine |
| * will be called again for the end of the physical log. |
| */ |
| if (i == -1) { |
| error = -1; |
| goto out; |
| } |
| |
| /* |
| * We have the final block of the good log (the first block |
| * of the log record _before_ the head. So we check the uuid. |
| */ |
| if ((error = xlog_header_check_mount(log->l_mp, head))) |
| goto out; |
| |
| /* |
| * We may have found a log record header before we expected one. |
| * last_blk will be the 1st block # with a given cycle #. We may end |
| * up reading an entire log record. In this case, we don't want to |
| * reset last_blk. Only when last_blk points in the middle of a log |
| * record do we update last_blk. |
| */ |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| uint h_size = INT_GET(head->h_size, ARCH_CONVERT); |
| |
| xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; |
| if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| xhdrs++; |
| } else { |
| xhdrs = 1; |
| } |
| |
| if (*last_blk - i + extra_bblks |
| != BTOBB(INT_GET(head->h_len, ARCH_CONVERT)) + xhdrs) |
| *last_blk = i; |
| |
| out: |
| xlog_put_bp(bp); |
| return error; |
| } |
| |
| /* |
| * Head is defined to be the point of the log where the next log write |
| * write could go. This means that incomplete LR writes at the end are |
| * eliminated when calculating the head. We aren't guaranteed that previous |
| * LR have complete transactions. We only know that a cycle number of |
| * current cycle number -1 won't be present in the log if we start writing |
| * from our current block number. |
| * |
| * last_blk contains the block number of the first block with a given |
| * cycle number. |
| * |
| * Return: zero if normal, non-zero if error. |
| */ |
| STATIC int |
| xlog_find_head( |
| xlog_t *log, |
| xfs_daddr_t *return_head_blk) |
| { |
| xfs_buf_t *bp; |
| xfs_caddr_t offset; |
| xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; |
| int num_scan_bblks; |
| uint first_half_cycle, last_half_cycle; |
| uint stop_on_cycle; |
| int error, log_bbnum = log->l_logBBsize; |
| |
| /* Is the end of the log device zeroed? */ |
| if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { |
| *return_head_blk = first_blk; |
| |
| /* Is the whole lot zeroed? */ |
| if (!first_blk) { |
| /* Linux XFS shouldn't generate totally zeroed logs - |
| * mkfs etc write a dummy unmount record to a fresh |
| * log so we can store the uuid in there |
| */ |
| xlog_warn("XFS: totally zeroed log"); |
| } |
| |
| return 0; |
| } else if (error) { |
| xlog_warn("XFS: empty log check failed"); |
| return error; |
| } |
| |
| first_blk = 0; /* get cycle # of 1st block */ |
| bp = xlog_get_bp(log, 1); |
| if (!bp) |
| return ENOMEM; |
| if ((error = xlog_bread(log, 0, 1, bp))) |
| goto bp_err; |
| offset = xlog_align(log, 0, 1, bp); |
| first_half_cycle = GET_CYCLE(offset, ARCH_CONVERT); |
| |
| last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ |
| if ((error = xlog_bread(log, last_blk, 1, bp))) |
| goto bp_err; |
| offset = xlog_align(log, last_blk, 1, bp); |
| last_half_cycle = GET_CYCLE(offset, ARCH_CONVERT); |
| ASSERT(last_half_cycle != 0); |
| |
| /* |
| * If the 1st half cycle number is equal to the last half cycle number, |
| * then the entire log is stamped with the same cycle number. In this |
| * case, head_blk can't be set to zero (which makes sense). The below |
| * math doesn't work out properly with head_blk equal to zero. Instead, |
| * we set it to log_bbnum which is an invalid block number, but this |
| * value makes the math correct. If head_blk doesn't changed through |
| * all the tests below, *head_blk is set to zero at the very end rather |
| * than log_bbnum. In a sense, log_bbnum and zero are the same block |
| * in a circular file. |
| */ |
| if (first_half_cycle == last_half_cycle) { |
| /* |
| * In this case we believe that the entire log should have |
| * cycle number last_half_cycle. We need to scan backwards |
| * from the end verifying that there are no holes still |
| * containing last_half_cycle - 1. If we find such a hole, |
| * then the start of that hole will be the new head. The |
| * simple case looks like |
| * x | x ... | x - 1 | x |
| * Another case that fits this picture would be |
| * x | x + 1 | x ... | x |
| * In this case the head really is somewhere at the end of the |
| * log, as one of the latest writes at the beginning was |
| * incomplete. |
| * One more case is |
| * x | x + 1 | x ... | x - 1 | x |
| * This is really the combination of the above two cases, and |
| * the head has to end up at the start of the x-1 hole at the |
| * end of the log. |
| * |
| * In the 256k log case, we will read from the beginning to the |
| * end of the log and search for cycle numbers equal to x-1. |
| * We don't worry about the x+1 blocks that we encounter, |
| * because we know that they cannot be the head since the log |
| * started with x. |
| */ |
| head_blk = log_bbnum; |
| stop_on_cycle = last_half_cycle - 1; |
| } else { |
| /* |
| * In this case we want to find the first block with cycle |
| * number matching last_half_cycle. We expect the log to be |
| * some variation on |
| * x + 1 ... | x ... |
| * The first block with cycle number x (last_half_cycle) will |
| * be where the new head belongs. First we do a binary search |
| * for the first occurrence of last_half_cycle. The binary |
| * search may not be totally accurate, so then we scan back |
| * from there looking for occurrences of last_half_cycle before |
| * us. If that backwards scan wraps around the beginning of |
| * the log, then we look for occurrences of last_half_cycle - 1 |
| * at the end of the log. The cases we're looking for look |
| * like |
| * x + 1 ... | x | x + 1 | x ... |
| * ^ binary search stopped here |
| * or |
| * x + 1 ... | x ... | x - 1 | x |
| * <---------> less than scan distance |
| */ |
| stop_on_cycle = last_half_cycle; |
| if ((error = xlog_find_cycle_start(log, bp, first_blk, |
| &head_blk, last_half_cycle))) |
| goto bp_err; |
| } |
| |
| /* |
| * Now validate the answer. Scan back some number of maximum possible |
| * blocks and make sure each one has the expected cycle number. The |
| * maximum is determined by the total possible amount of buffering |
| * in the in-core log. The following number can be made tighter if |
| * we actually look at the block size of the filesystem. |
| */ |
| num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); |
| if (head_blk >= num_scan_bblks) { |
| /* |
| * We are guaranteed that the entire check can be performed |
| * in one buffer. |
| */ |
| start_blk = head_blk - num_scan_bblks; |
| if ((error = xlog_find_verify_cycle(log, |
| start_blk, num_scan_bblks, |
| stop_on_cycle, &new_blk))) |
| goto bp_err; |
| if (new_blk != -1) |
| head_blk = new_blk; |
| } else { /* need to read 2 parts of log */ |
| /* |
| * We are going to scan backwards in the log in two parts. |
| * First we scan the physical end of the log. In this part |
| * of the log, we are looking for blocks with cycle number |
| * last_half_cycle - 1. |
| * If we find one, then we know that the log starts there, as |
| * we've found a hole that didn't get written in going around |
| * the end of the physical log. The simple case for this is |
| * x + 1 ... | x ... | x - 1 | x |
| * <---------> less than scan distance |
| * If all of the blocks at the end of the log have cycle number |
| * last_half_cycle, then we check the blocks at the start of |
| * the log looking for occurrences of last_half_cycle. If we |
| * find one, then our current estimate for the location of the |
| * first occurrence of last_half_cycle is wrong and we move |
| * back to the hole we've found. This case looks like |
| * x + 1 ... | x | x + 1 | x ... |
| * ^ binary search stopped here |
| * Another case we need to handle that only occurs in 256k |
| * logs is |
| * x + 1 ... | x ... | x+1 | x ... |
| * ^ binary search stops here |
| * In a 256k log, the scan at the end of the log will see the |
| * x + 1 blocks. We need to skip past those since that is |
| * certainly not the head of the log. By searching for |
| * last_half_cycle-1 we accomplish that. |
| */ |
| start_blk = log_bbnum - num_scan_bblks + head_blk; |
| ASSERT(head_blk <= INT_MAX && |
| (xfs_daddr_t) num_scan_bblks - head_blk >= 0); |
| if ((error = xlog_find_verify_cycle(log, start_blk, |
| num_scan_bblks - (int)head_blk, |
| (stop_on_cycle - 1), &new_blk))) |
| goto bp_err; |
| if (new_blk != -1) { |
| head_blk = new_blk; |
| goto bad_blk; |
| } |
| |
| /* |
| * Scan beginning of log now. The last part of the physical |
| * log is good. This scan needs to verify that it doesn't find |
| * the last_half_cycle. |
| */ |
| start_blk = 0; |
| ASSERT(head_blk <= INT_MAX); |
| if ((error = xlog_find_verify_cycle(log, |
| start_blk, (int)head_blk, |
| stop_on_cycle, &new_blk))) |
| goto bp_err; |
| if (new_blk != -1) |
| head_blk = new_blk; |
| } |
| |
| bad_blk: |
| /* |
| * Now we need to make sure head_blk is not pointing to a block in |
| * the middle of a log record. |
| */ |
| num_scan_bblks = XLOG_REC_SHIFT(log); |
| if (head_blk >= num_scan_bblks) { |
| start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ |
| |
| /* start ptr at last block ptr before head_blk */ |
| if ((error = xlog_find_verify_log_record(log, start_blk, |
| &head_blk, 0)) == -1) { |
| error = XFS_ERROR(EIO); |
| goto bp_err; |
| } else if (error) |
| goto bp_err; |
| } else { |
| start_blk = 0; |
| ASSERT(head_blk <= INT_MAX); |
| if ((error = xlog_find_verify_log_record(log, start_blk, |
| &head_blk, 0)) == -1) { |
| /* We hit the beginning of the log during our search */ |
| start_blk = log_bbnum - num_scan_bblks + head_blk; |
| new_blk = log_bbnum; |
| ASSERT(start_blk <= INT_MAX && |
| (xfs_daddr_t) log_bbnum-start_blk >= 0); |
| ASSERT(head_blk <= INT_MAX); |
| if ((error = xlog_find_verify_log_record(log, |
| start_blk, &new_blk, |
| (int)head_blk)) == -1) { |
| error = XFS_ERROR(EIO); |
| goto bp_err; |
| } else if (error) |
| goto bp_err; |
| if (new_blk != log_bbnum) |
| head_blk = new_blk; |
| } else if (error) |
| goto bp_err; |
| } |
| |
| xlog_put_bp(bp); |
| if (head_blk == log_bbnum) |
| *return_head_blk = 0; |
| else |
| *return_head_blk = head_blk; |
| /* |
| * When returning here, we have a good block number. Bad block |
| * means that during a previous crash, we didn't have a clean break |
| * from cycle number N to cycle number N-1. In this case, we need |
| * to find the first block with cycle number N-1. |
| */ |
| return 0; |
| |
| bp_err: |
| xlog_put_bp(bp); |
| |
| if (error) |
| xlog_warn("XFS: failed to find log head"); |
| return error; |
| } |
| |
| /* |
| * Find the sync block number or the tail of the log. |
| * |
| * This will be the block number of the last record to have its |
| * associated buffers synced to disk. Every log record header has |
| * a sync lsn embedded in it. LSNs hold block numbers, so it is easy |
| * to get a sync block number. The only concern is to figure out which |
| * log record header to believe. |
| * |
| * The following algorithm uses the log record header with the largest |
| * lsn. The entire log record does not need to be valid. We only care |
| * that the header is valid. |
| * |
| * We could speed up search by using current head_blk buffer, but it is not |
| * available. |
| */ |
| int |
| xlog_find_tail( |
| xlog_t *log, |
| xfs_daddr_t *head_blk, |
| xfs_daddr_t *tail_blk) |
| { |
| xlog_rec_header_t *rhead; |
| xlog_op_header_t *op_head; |
| xfs_caddr_t offset = NULL; |
| xfs_buf_t *bp; |
| int error, i, found; |
| xfs_daddr_t umount_data_blk; |
| xfs_daddr_t after_umount_blk; |
| xfs_lsn_t tail_lsn; |
| int hblks; |
| |
| found = 0; |
| |
| /* |
| * Find previous log record |
| */ |
| if ((error = xlog_find_head(log, head_blk))) |
| return error; |
| |
| bp = xlog_get_bp(log, 1); |
| if (!bp) |
| return ENOMEM; |
| if (*head_blk == 0) { /* special case */ |
| if ((error = xlog_bread(log, 0, 1, bp))) |
| goto bread_err; |
| offset = xlog_align(log, 0, 1, bp); |
| if (GET_CYCLE(offset, ARCH_CONVERT) == 0) { |
| *tail_blk = 0; |
| /* leave all other log inited values alone */ |
| goto exit; |
| } |
| } |
| |
| /* |
| * Search backwards looking for log record header block |
| */ |
| ASSERT(*head_blk < INT_MAX); |
| for (i = (int)(*head_blk) - 1; i >= 0; i--) { |
| if ((error = xlog_bread(log, i, 1, bp))) |
| goto bread_err; |
| offset = xlog_align(log, i, 1, bp); |
| if (XLOG_HEADER_MAGIC_NUM == |
| INT_GET(*(uint *)offset, ARCH_CONVERT)) { |
| found = 1; |
| break; |
| } |
| } |
| /* |
| * If we haven't found the log record header block, start looking |
| * again from the end of the physical log. XXXmiken: There should be |
| * a check here to make sure we didn't search more than N blocks in |
| * the previous code. |
| */ |
| if (!found) { |
| for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { |
| if ((error = xlog_bread(log, i, 1, bp))) |
| goto bread_err; |
| offset = xlog_align(log, i, 1, bp); |
| if (XLOG_HEADER_MAGIC_NUM == |
| INT_GET(*(uint*)offset, ARCH_CONVERT)) { |
| found = 2; |
| break; |
| } |
| } |
| } |
| if (!found) { |
| xlog_warn("XFS: xlog_find_tail: couldn't find sync record"); |
| ASSERT(0); |
| return XFS_ERROR(EIO); |
| } |
| |
| /* find blk_no of tail of log */ |
| rhead = (xlog_rec_header_t *)offset; |
| *tail_blk = BLOCK_LSN(INT_GET(rhead->h_tail_lsn, ARCH_CONVERT)); |
| |
| /* |
| * Reset log values according to the state of the log when we |
| * crashed. In the case where head_blk == 0, we bump curr_cycle |
| * one because the next write starts a new cycle rather than |
| * continuing the cycle of the last good log record. At this |
| * point we have guaranteed that all partial log records have been |
| * accounted for. Therefore, we know that the last good log record |
| * written was complete and ended exactly on the end boundary |
| * of the physical log. |
| */ |
| log->l_prev_block = i; |
| log->l_curr_block = (int)*head_blk; |
| log->l_curr_cycle = INT_GET(rhead->h_cycle, ARCH_CONVERT); |
| if (found == 2) |
| log->l_curr_cycle++; |
| log->l_tail_lsn = INT_GET(rhead->h_tail_lsn, ARCH_CONVERT); |
| log->l_last_sync_lsn = INT_GET(rhead->h_lsn, ARCH_CONVERT); |
| log->l_grant_reserve_cycle = log->l_curr_cycle; |
| log->l_grant_reserve_bytes = BBTOB(log->l_curr_block); |
| log->l_grant_write_cycle = log->l_curr_cycle; |
| log->l_grant_write_bytes = BBTOB(log->l_curr_block); |
| |
| /* |
| * Look for unmount record. If we find it, then we know there |
| * was a clean unmount. Since 'i' could be the last block in |
| * the physical log, we convert to a log block before comparing |
| * to the head_blk. |
| * |
| * Save the current tail lsn to use to pass to |
| * xlog_clear_stale_blocks() below. We won't want to clear the |
| * unmount record if there is one, so we pass the lsn of the |
| * unmount record rather than the block after it. |
| */ |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| int h_size = INT_GET(rhead->h_size, ARCH_CONVERT); |
| int h_version = INT_GET(rhead->h_version, ARCH_CONVERT); |
| |
| if ((h_version & XLOG_VERSION_2) && |
| (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
| hblks = h_size / XLOG_HEADER_CYCLE_SIZE; |
| if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| hblks++; |
| } else { |
| hblks = 1; |
| } |
| } else { |
| hblks = 1; |
| } |
| after_umount_blk = (i + hblks + (int) |
| BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT))) % log->l_logBBsize; |
| tail_lsn = log->l_tail_lsn; |
| if (*head_blk == after_umount_blk && |
| INT_GET(rhead->h_num_logops, ARCH_CONVERT) == 1) { |
| umount_data_blk = (i + hblks) % log->l_logBBsize; |
| if ((error = xlog_bread(log, umount_data_blk, 1, bp))) { |
| goto bread_err; |
| } |
| offset = xlog_align(log, umount_data_blk, 1, bp); |
| op_head = (xlog_op_header_t *)offset; |
| if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { |
| /* |
| * Set tail and last sync so that newly written |
| * log records will point recovery to after the |
| * current unmount record. |
| */ |
| ASSIGN_ANY_LSN_HOST(log->l_tail_lsn, log->l_curr_cycle, |
| after_umount_blk); |
| ASSIGN_ANY_LSN_HOST(log->l_last_sync_lsn, log->l_curr_cycle, |
| after_umount_blk); |
| *tail_blk = after_umount_blk; |
| } |
| } |
| |
| /* |
| * Make sure that there are no blocks in front of the head |
| * with the same cycle number as the head. This can happen |
| * because we allow multiple outstanding log writes concurrently, |
| * and the later writes might make it out before earlier ones. |
| * |
| * We use the lsn from before modifying it so that we'll never |
| * overwrite the unmount record after a clean unmount. |
| * |
| * Do this only if we are going to recover the filesystem |
| * |
| * NOTE: This used to say "if (!readonly)" |
| * However on Linux, we can & do recover a read-only filesystem. |
| * We only skip recovery if NORECOVERY is specified on mount, |
| * in which case we would not be here. |
| * |
| * But... if the -device- itself is readonly, just skip this. |
| * We can't recover this device anyway, so it won't matter. |
| */ |
| if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) { |
| error = xlog_clear_stale_blocks(log, tail_lsn); |
| } |
| |
| bread_err: |
| exit: |
| xlog_put_bp(bp); |
| |
| if (error) |
| xlog_warn("XFS: failed to locate log tail"); |
| return error; |
| } |
| |
| /* |
| * Is the log zeroed at all? |
| * |
| * The last binary search should be changed to perform an X block read |
| * once X becomes small enough. You can then search linearly through |
| * the X blocks. This will cut down on the number of reads we need to do. |
| * |
| * If the log is partially zeroed, this routine will pass back the blkno |
| * of the first block with cycle number 0. It won't have a complete LR |
| * preceding it. |
| * |
| * Return: |
| * 0 => the log is completely written to |
| * -1 => use *blk_no as the first block of the log |
| * >0 => error has occurred |
| */ |
| int |
| xlog_find_zeroed( |
| xlog_t *log, |
| xfs_daddr_t *blk_no) |
| { |
| xfs_buf_t *bp; |
| xfs_caddr_t offset; |
| uint first_cycle, last_cycle; |
| xfs_daddr_t new_blk, last_blk, start_blk; |
| xfs_daddr_t num_scan_bblks; |
| int error, log_bbnum = log->l_logBBsize; |
| |
| /* check totally zeroed log */ |
| bp = xlog_get_bp(log, 1); |
| if (!bp) |
| return ENOMEM; |
| if ((error = xlog_bread(log, 0, 1, bp))) |
| goto bp_err; |
| offset = xlog_align(log, 0, 1, bp); |
| first_cycle = GET_CYCLE(offset, ARCH_CONVERT); |
| if (first_cycle == 0) { /* completely zeroed log */ |
| *blk_no = 0; |
| xlog_put_bp(bp); |
| return -1; |
| } |
| |
| /* check partially zeroed log */ |
| if ((error = xlog_bread(log, log_bbnum-1, 1, bp))) |
| goto bp_err; |
| offset = xlog_align(log, log_bbnum-1, 1, bp); |
| last_cycle = GET_CYCLE(offset, ARCH_CONVERT); |
| if (last_cycle != 0) { /* log completely written to */ |
| xlog_put_bp(bp); |
| return 0; |
| } else if (first_cycle != 1) { |
| /* |
| * If the cycle of the last block is zero, the cycle of |
| * the first block must be 1. If it's not, maybe we're |
| * not looking at a log... Bail out. |
| */ |
| xlog_warn("XFS: Log inconsistent or not a log (last==0, first!=1)"); |
| return XFS_ERROR(EINVAL); |
| } |
| |
| /* we have a partially zeroed log */ |
| last_blk = log_bbnum-1; |
| if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) |
| goto bp_err; |
| |
| /* |
| * Validate the answer. Because there is no way to guarantee that |
| * the entire log is made up of log records which are the same size, |
| * we scan over the defined maximum blocks. At this point, the maximum |
| * is not chosen to mean anything special. XXXmiken |
| */ |
| num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); |
| ASSERT(num_scan_bblks <= INT_MAX); |
| |
| if (last_blk < num_scan_bblks) |
| num_scan_bblks = last_blk; |
| start_blk = last_blk - num_scan_bblks; |
| |
| /* |
| * We search for any instances of cycle number 0 that occur before |
| * our current estimate of the head. What we're trying to detect is |
| * 1 ... | 0 | 1 | 0... |
| * ^ binary search ends here |
| */ |
| if ((error = xlog_find_verify_cycle(log, start_blk, |
| (int)num_scan_bblks, 0, &new_blk))) |
| goto bp_err; |
| if (new_blk != -1) |
| last_blk = new_blk; |
| |
| /* |
| * Potentially backup over partial log record write. We don't need |
| * to search the end of the log because we know it is zero. |
| */ |
| if ((error = xlog_find_verify_log_record(log, start_blk, |
| &last_blk, 0)) == -1) { |
| error = XFS_ERROR(EIO); |
| goto bp_err; |
| } else if (error) |
| goto bp_err; |
| |
| *blk_no = last_blk; |
| bp_err: |
| xlog_put_bp(bp); |
| if (error) |
| return error; |
| return -1; |
| } |
| |
| /* |
| * These are simple subroutines used by xlog_clear_stale_blocks() below |
| * to initialize a buffer full of empty log record headers and write |
| * them into the log. |
| */ |
| STATIC void |
| xlog_add_record( |
| xlog_t *log, |
| xfs_caddr_t buf, |
| int cycle, |
| int block, |
| int tail_cycle, |
| int tail_block) |
| { |
| xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; |
| |
| memset(buf, 0, BBSIZE); |
| INT_SET(recp->h_magicno, ARCH_CONVERT, XLOG_HEADER_MAGIC_NUM); |
| INT_SET(recp->h_cycle, ARCH_CONVERT, cycle); |
| INT_SET(recp->h_version, ARCH_CONVERT, |
| XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? 2 : 1); |
| ASSIGN_ANY_LSN_DISK(recp->h_lsn, cycle, block); |
| ASSIGN_ANY_LSN_DISK(recp->h_tail_lsn, tail_cycle, tail_block); |
| INT_SET(recp->h_fmt, ARCH_CONVERT, XLOG_FMT); |
| memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
| } |
| |
| STATIC int |
| xlog_write_log_records( |
| xlog_t *log, |
| int cycle, |
| int start_block, |
| int blocks, |
| int tail_cycle, |
| int tail_block) |
| { |
| xfs_caddr_t offset; |
| xfs_buf_t *bp; |
| int balign, ealign; |
| int sectbb = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1); |
| int end_block = start_block + blocks; |
| int bufblks; |
| int error = 0; |
| int i, j = 0; |
| |
| bufblks = 1 << ffs(blocks); |
| while (!(bp = xlog_get_bp(log, bufblks))) { |
| bufblks >>= 1; |
| if (bufblks <= log->l_sectbb_log) |
| return ENOMEM; |
| } |
| |
| /* We may need to do a read at the start to fill in part of |
| * the buffer in the starting sector not covered by the first |
| * write below. |
| */ |
| balign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, start_block); |
| if (balign != start_block) { |
| if ((error = xlog_bread(log, start_block, 1, bp))) { |
| xlog_put_bp(bp); |
| return error; |
| } |
| j = start_block - balign; |
| } |
| |
| for (i = start_block; i < end_block; i += bufblks) { |
| int bcount, endcount; |
| |
| bcount = min(bufblks, end_block - start_block); |
| endcount = bcount - j; |
| |
| /* We may need to do a read at the end to fill in part of |
| * the buffer in the final sector not covered by the write. |
| * If this is the same sector as the above read, skip it. |
| */ |
| ealign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, end_block); |
| if (j == 0 && (start_block + endcount > ealign)) { |
| offset = XFS_BUF_PTR(bp); |
| balign = BBTOB(ealign - start_block); |
| XFS_BUF_SET_PTR(bp, offset + balign, BBTOB(sectbb)); |
| if ((error = xlog_bread(log, ealign, sectbb, bp))) |
| break; |
| XFS_BUF_SET_PTR(bp, offset, bufblks); |
| } |
| |
| offset = xlog_align(log, start_block, endcount, bp); |
| for (; j < endcount; j++) { |
| xlog_add_record(log, offset, cycle, i+j, |
| tail_cycle, tail_block); |
| offset += BBSIZE; |
| } |
| error = xlog_bwrite(log, start_block, endcount, bp); |
| if (error) |
| break; |
| start_block += endcount; |
| j = 0; |
| } |
| xlog_put_bp(bp); |
| return error; |
| } |
| |
| /* |
| * This routine is called to blow away any incomplete log writes out |
| * in front of the log head. We do this so that we won't become confused |
| * if we come up, write only a little bit more, and then crash again. |
| * If we leave the partial log records out there, this situation could |
| * cause us to think those partial writes are valid blocks since they |
| * have the current cycle number. We get rid of them by overwriting them |
| * with empty log records with the old cycle number rather than the |
| * current one. |
| * |
| * The tail lsn is passed in rather than taken from |
| * the log so that we will not write over the unmount record after a |
| * clean unmount in a 512 block log. Doing so would leave the log without |
| * any valid log records in it until a new one was written. If we crashed |
| * during that time we would not be able to recover. |
| */ |
| STATIC int |
| xlog_clear_stale_blocks( |
| xlog_t *log, |
| xfs_lsn_t tail_lsn) |
| { |
| int tail_cycle, head_cycle; |
| int tail_block, head_block; |
| int tail_distance, max_distance; |
| int distance; |
| int error; |
| |
| tail_cycle = CYCLE_LSN(tail_lsn); |
| tail_block = BLOCK_LSN(tail_lsn); |
| head_cycle = log->l_curr_cycle; |
| head_block = log->l_curr_block; |
| |
| /* |
| * Figure out the distance between the new head of the log |
| * and the tail. We want to write over any blocks beyond the |
| * head that we may have written just before the crash, but |
| * we don't want to overwrite the tail of the log. |
| */ |
| if (head_cycle == tail_cycle) { |
| /* |
| * The tail is behind the head in the physical log, |
| * so the distance from the head to the tail is the |
| * distance from the head to the end of the log plus |
| * the distance from the beginning of the log to the |
| * tail. |
| */ |
| if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { |
| XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| tail_distance = tail_block + (log->l_logBBsize - head_block); |
| } else { |
| /* |
| * The head is behind the tail in the physical log, |
| * so the distance from the head to the tail is just |
| * the tail block minus the head block. |
| */ |
| if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ |
| XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| tail_distance = tail_block - head_block; |
| } |
| |
| /* |
| * If the head is right up against the tail, we can't clear |
| * anything. |
| */ |
| if (tail_distance <= 0) { |
| ASSERT(tail_distance == 0); |
| return 0; |
| } |
| |
| max_distance = XLOG_TOTAL_REC_SHIFT(log); |
| /* |
| * Take the smaller of the maximum amount of outstanding I/O |
| * we could have and the distance to the tail to clear out. |
| * We take the smaller so that we don't overwrite the tail and |
| * we don't waste all day writing from the head to the tail |
| * for no reason. |
| */ |
| max_distance = MIN(max_distance, tail_distance); |
| |
| if ((head_block + max_distance) <= log->l_logBBsize) { |
| /* |
| * We can stomp all the blocks we need to without |
| * wrapping around the end of the log. Just do it |
| * in a single write. Use the cycle number of the |
| * current cycle minus one so that the log will look like: |
| * n ... | n - 1 ... |
| */ |
| error = xlog_write_log_records(log, (head_cycle - 1), |
| head_block, max_distance, tail_cycle, |
| tail_block); |
| if (error) |
| return error; |
| } else { |
| /* |
| * We need to wrap around the end of the physical log in |
| * order to clear all the blocks. Do it in two separate |
| * I/Os. The first write should be from the head to the |
| * end of the physical log, and it should use the current |
| * cycle number minus one just like above. |
| */ |
| distance = log->l_logBBsize - head_block; |
| error = xlog_write_log_records(log, (head_cycle - 1), |
| head_block, distance, tail_cycle, |
| tail_block); |
| |
| if (error) |
| return error; |
| |
| /* |
| * Now write the blocks at the start of the physical log. |
| * This writes the remainder of the blocks we want to clear. |
| * It uses the current cycle number since we're now on the |
| * same cycle as the head so that we get: |
| * n ... n ... | n - 1 ... |
| * ^^^^^ blocks we're writing |
| */ |
| distance = max_distance - (log->l_logBBsize - head_block); |
| error = xlog_write_log_records(log, head_cycle, 0, distance, |
| tail_cycle, tail_block); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| /****************************************************************************** |
| * |
| * Log recover routines |
| * |
| ****************************************************************************** |
| */ |
| |
| STATIC xlog_recover_t * |
| xlog_recover_find_tid( |
| xlog_recover_t *q, |
| xlog_tid_t tid) |
| { |
| xlog_recover_t *p = q; |
| |
| while (p != NULL) { |
| if (p->r_log_tid == tid) |
| break; |
| p = p->r_next; |
| } |
| return p; |
| } |
| |
| STATIC void |
| xlog_recover_put_hashq( |
| xlog_recover_t **q, |
| xlog_recover_t *trans) |
| { |
| trans->r_next = *q; |
| *q = trans; |
| } |
| |
| STATIC void |
| xlog_recover_add_item( |
| xlog_recover_item_t **itemq) |
| { |
| xlog_recover_item_t *item; |
| |
| item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); |
| xlog_recover_insert_item_backq(itemq, item); |
| } |
| |
| STATIC int |
| xlog_recover_add_to_cont_trans( |
| xlog_recover_t *trans, |
| xfs_caddr_t dp, |
| int len) |
| { |
| xlog_recover_item_t *item; |
| xfs_caddr_t ptr, old_ptr; |
| int old_len; |
| |
| item = trans->r_itemq; |
| if (item == 0) { |
| /* finish copying rest of trans header */ |
| xlog_recover_add_item(&trans->r_itemq); |
| ptr = (xfs_caddr_t) &trans->r_theader + |
| sizeof(xfs_trans_header_t) - len; |
| memcpy(ptr, dp, len); /* d, s, l */ |
| return 0; |
| } |
| item = item->ri_prev; |
| |
| old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; |
| old_len = item->ri_buf[item->ri_cnt-1].i_len; |
| |
| ptr = kmem_realloc(old_ptr, len+old_len, old_len, 0u); |
| memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
| item->ri_buf[item->ri_cnt-1].i_len += len; |
| item->ri_buf[item->ri_cnt-1].i_addr = ptr; |
| return 0; |
| } |
| |
| /* |
| * The next region to add is the start of a new region. It could be |
| * a whole region or it could be the first part of a new region. Because |
| * of this, the assumption here is that the type and size fields of all |
| * format structures fit into the first 32 bits of the structure. |
| * |
| * This works because all regions must be 32 bit aligned. Therefore, we |
| * either have both fields or we have neither field. In the case we have |
| * neither field, the data part of the region is zero length. We only have |
| * a log_op_header and can throw away the header since a new one will appear |
| * later. If we have at least 4 bytes, then we can determine how many regions |
| * will appear in the current log item. |
| */ |
| STATIC int |
| xlog_recover_add_to_trans( |
| xlog_recover_t *trans, |
| xfs_caddr_t dp, |
| int len) |
| { |
| xfs_inode_log_format_t *in_f; /* any will do */ |
| xlog_recover_item_t *item; |
| xfs_caddr_t ptr; |
| |
| if (!len) |
| return 0; |
| item = trans->r_itemq; |
| if (item == 0) { |
| ASSERT(*(uint *)dp == XFS_TRANS_HEADER_MAGIC); |
| if (len == sizeof(xfs_trans_header_t)) |
| xlog_recover_add_item(&trans->r_itemq); |
| memcpy(&trans->r_theader, dp, len); /* d, s, l */ |
| return 0; |
| } |
| |
| ptr = kmem_alloc(len, KM_SLEEP); |
| memcpy(ptr, dp, len); |
| in_f = (xfs_inode_log_format_t *)ptr; |
| |
| if (item->ri_prev->ri_total != 0 && |
| item->ri_prev->ri_total == item->ri_prev->ri_cnt) { |
| xlog_recover_add_item(&trans->r_itemq); |
| } |
| item = trans->r_itemq; |
| item = item->ri_prev; |
| |
| if (item->ri_total == 0) { /* first region to be added */ |
| item->ri_total = in_f->ilf_size; |
| ASSERT(item->ri_total <= XLOG_MAX_REGIONS_IN_ITEM); |
| item->ri_buf = kmem_zalloc((item->ri_total * |
| sizeof(xfs_log_iovec_t)), KM_SLEEP); |
| } |
| ASSERT(item->ri_total > item->ri_cnt); |
| /* Description region is ri_buf[0] */ |
| item->ri_buf[item->ri_cnt].i_addr = ptr; |
| item->ri_buf[item->ri_cnt].i_len = len; |
| item->ri_cnt++; |
| return 0; |
| } |
| |
| STATIC void |
| xlog_recover_new_tid( |
| xlog_recover_t **q, |
| xlog_tid_t tid, |
| xfs_lsn_t lsn) |
| { |
| xlog_recover_t *trans; |
| |
| trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); |
| trans->r_log_tid = tid; |
| trans->r_lsn = lsn; |
| xlog_recover_put_hashq(q, trans); |
| } |
| |
| STATIC int |
| xlog_recover_unlink_tid( |
| xlog_recover_t **q, |
| xlog_recover_t *trans) |
| { |
| xlog_recover_t *tp; |
| int found = 0; |
| |
| ASSERT(trans != 0); |
| if (trans == *q) { |
| *q = (*q)->r_next; |
| } else { |
| tp = *q; |
| while (tp != 0) { |
| if (tp->r_next == trans) { |
| found = 1; |
| break; |
| } |
| tp = tp->r_next; |
| } |
| if (!found) { |
| xlog_warn( |
| "XFS: xlog_recover_unlink_tid: trans not found"); |
| ASSERT(0); |
| return XFS_ERROR(EIO); |
| } |
| tp->r_next = tp->r_next->r_next; |
| } |
| return 0; |
| } |
| |
| STATIC void |
| xlog_recover_insert_item_backq( |
| xlog_recover_item_t **q, |
| xlog_recover_item_t *item) |
| { |
| if (*q == 0) { |
| item->ri_prev = item->ri_next = item; |
| *q = item; |
| } else { |
| item->ri_next = *q; |
| item->ri_prev = (*q)->ri_prev; |
| (*q)->ri_prev = item; |
| item->ri_prev->ri_next = item; |
| } |
| } |
| |
| STATIC void |
| xlog_recover_insert_item_frontq( |
| xlog_recover_item_t **q, |
| xlog_recover_item_t *item) |
| { |
| xlog_recover_insert_item_backq(q, item); |
| *q = item; |
| } |
| |
| STATIC int |
| xlog_recover_reorder_trans( |
| xlog_t *log, |
| xlog_recover_t *trans) |
| { |
| xlog_recover_item_t *first_item, *itemq, *itemq_next; |
| xfs_buf_log_format_t *buf_f; |
| xfs_buf_log_format_v1_t *obuf_f; |
| ushort flags = 0; |
| |
| first_item = itemq = trans->r_itemq; |
| trans->r_itemq = NULL; |
| do { |
| itemq_next = itemq->ri_next; |
| buf_f = (xfs_buf_log_format_t *)itemq->ri_buf[0].i_addr; |
| switch (ITEM_TYPE(itemq)) { |
| case XFS_LI_BUF: |
| flags = buf_f->blf_flags; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| flags = obuf_f->blf_flags; |
| break; |
| } |
| |
| switch (ITEM_TYPE(itemq)) { |
| case XFS_LI_BUF: |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| if (!(flags & XFS_BLI_CANCEL)) { |
| xlog_recover_insert_item_frontq(&trans->r_itemq, |
| itemq); |
| break; |
| } |
| case XFS_LI_INODE: |
| case XFS_LI_6_1_INODE: |
| case XFS_LI_5_3_INODE: |
| case XFS_LI_DQUOT: |
| case XFS_LI_QUOTAOFF: |
| case XFS_LI_EFD: |
| case XFS_LI_EFI: |
| xlog_recover_insert_item_backq(&trans->r_itemq, itemq); |
| break; |
| default: |
| xlog_warn( |
| "XFS: xlog_recover_reorder_trans: unrecognized type of log operation"); |
| ASSERT(0); |
| return XFS_ERROR(EIO); |
| } |
| itemq = itemq_next; |
| } while (first_item != itemq); |
| return 0; |
| } |
| |
| /* |
| * Build up the table of buf cancel records so that we don't replay |
| * cancelled data in the second pass. For buffer records that are |
| * not cancel records, there is nothing to do here so we just return. |
| * |
| * If we get a cancel record which is already in the table, this indicates |
| * that the buffer was cancelled multiple times. In order to ensure |
| * that during pass 2 we keep the record in the table until we reach its |
| * last occurrence in the log, we keep a reference count in the cancel |
| * record in the table to tell us how many times we expect to see this |
| * record during the second pass. |
| */ |
| STATIC void |
| xlog_recover_do_buffer_pass1( |
| xlog_t *log, |
| xfs_buf_log_format_t *buf_f) |
| { |
| xfs_buf_cancel_t *bcp; |
| xfs_buf_cancel_t *nextp; |
| xfs_buf_cancel_t *prevp; |
| xfs_buf_cancel_t **bucket; |
| xfs_buf_log_format_v1_t *obuf_f; |
| xfs_daddr_t blkno = 0; |
| uint len = 0; |
| ushort flags = 0; |
| |
| switch (buf_f->blf_type) { |
| case XFS_LI_BUF: |
| blkno = buf_f->blf_blkno; |
| len = buf_f->blf_len; |
| flags = buf_f->blf_flags; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| blkno = (xfs_daddr_t) obuf_f->blf_blkno; |
| len = obuf_f->blf_len; |
| flags = obuf_f->blf_flags; |
| break; |
| } |
| |
| /* |
| * If this isn't a cancel buffer item, then just return. |
| */ |
| if (!(flags & XFS_BLI_CANCEL)) |
| return; |
| |
| /* |
| * Insert an xfs_buf_cancel record into the hash table of |
| * them. If there is already an identical record, bump |
| * its reference count. |
| */ |
| bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % |
| XLOG_BC_TABLE_SIZE]; |
| /* |
| * If the hash bucket is empty then just insert a new record into |
| * the bucket. |
| */ |
| if (*bucket == NULL) { |
| bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), |
| KM_SLEEP); |
| bcp->bc_blkno = blkno; |
| bcp->bc_len = len; |
| bcp->bc_refcount = 1; |
| bcp->bc_next = NULL; |
| *bucket = bcp; |
| return; |
| } |
| |
| /* |
| * The hash bucket is not empty, so search for duplicates of our |
| * record. If we find one them just bump its refcount. If not |
| * then add us at the end of the list. |
| */ |
| prevp = NULL; |
| nextp = *bucket; |
| while (nextp != NULL) { |
| if (nextp->bc_blkno == blkno && nextp->bc_len == len) { |
| nextp->bc_refcount++; |
| return; |
| } |
| prevp = nextp; |
| nextp = nextp->bc_next; |
| } |
| ASSERT(prevp != NULL); |
| bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), |
| KM_SLEEP); |
| bcp->bc_blkno = blkno; |
| bcp->bc_len = len; |
| bcp->bc_refcount = 1; |
| bcp->bc_next = NULL; |
| prevp->bc_next = bcp; |
| } |
| |
| /* |
| * Check to see whether the buffer being recovered has a corresponding |
| * entry in the buffer cancel record table. If it does then return 1 |
| * so that it will be cancelled, otherwise return 0. If the buffer is |
| * actually a buffer cancel item (XFS_BLI_CANCEL is set), then decrement |
| * the refcount on the entry in the table and remove it from the table |
| * if this is the last reference. |
| * |
| * We remove the cancel record from the table when we encounter its |
| * last occurrence in the log so that if the same buffer is re-used |
| * again after its last cancellation we actually replay the changes |
| * made at that point. |
| */ |
| STATIC int |
| xlog_check_buffer_cancelled( |
| xlog_t *log, |
| xfs_daddr_t blkno, |
| uint len, |
| ushort flags) |
| { |
| xfs_buf_cancel_t *bcp; |
| xfs_buf_cancel_t *prevp; |
| xfs_buf_cancel_t **bucket; |
| |
| if (log->l_buf_cancel_table == NULL) { |
| /* |
| * There is nothing in the table built in pass one, |
| * so this buffer must not be cancelled. |
| */ |
| ASSERT(!(flags & XFS_BLI_CANCEL)); |
| return 0; |
| } |
| |
| bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % |
| XLOG_BC_TABLE_SIZE]; |
| bcp = *bucket; |
| if (bcp == NULL) { |
| /* |
| * There is no corresponding entry in the table built |
| * in pass one, so this buffer has not been cancelled. |
| */ |
| ASSERT(!(flags & XFS_BLI_CANCEL)); |
| return 0; |
| } |
| |
| /* |
| * Search for an entry in the buffer cancel table that |
| * matches our buffer. |
| */ |
| prevp = NULL; |
| while (bcp != NULL) { |
| if (bcp->bc_blkno == blkno && bcp->bc_len == len) { |
| /* |
| * We've go a match, so return 1 so that the |
| * recovery of this buffer is cancelled. |
| * If this buffer is actually a buffer cancel |
| * log item, then decrement the refcount on the |
| * one in the table and remove it if this is the |
| * last reference. |
| */ |
| if (flags & XFS_BLI_CANCEL) { |
| bcp->bc_refcount--; |
| if (bcp->bc_refcount == 0) { |
| if (prevp == NULL) { |
| *bucket = bcp->bc_next; |
| } else { |
| prevp->bc_next = bcp->bc_next; |
| } |
| kmem_free(bcp, |
| sizeof(xfs_buf_cancel_t)); |
| } |
| } |
| return 1; |
| } |
| prevp = bcp; |
| bcp = bcp->bc_next; |
| } |
| /* |
| * We didn't find a corresponding entry in the table, so |
| * return 0 so that the buffer is NOT cancelled. |
| */ |
| ASSERT(!(flags & XFS_BLI_CANCEL)); |
| return 0; |
| } |
| |
| STATIC int |
| xlog_recover_do_buffer_pass2( |
| xlog_t *log, |
| xfs_buf_log_format_t *buf_f) |
| { |
| xfs_buf_log_format_v1_t *obuf_f; |
| xfs_daddr_t blkno = 0; |
| ushort flags = 0; |
| uint len = 0; |
| |
| switch (buf_f->blf_type) { |
| case XFS_LI_BUF: |
| blkno = buf_f->blf_blkno; |
| flags = buf_f->blf_flags; |
| len = buf_f->blf_len; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| blkno = (xfs_daddr_t) obuf_f->blf_blkno; |
| flags = obuf_f->blf_flags; |
| len = (xfs_daddr_t) obuf_f->blf_len; |
| break; |
| } |
| |
| return xlog_check_buffer_cancelled(log, blkno, len, flags); |
| } |
| |
| /* |
| * Perform recovery for a buffer full of inodes. In these buffers, |
| * the only data which should be recovered is that which corresponds |
| * to the di_next_unlinked pointers in the on disk inode structures. |
| * The rest of the data for the inodes is always logged through the |
| * inodes themselves rather than the inode buffer and is recovered |
| * in xlog_recover_do_inode_trans(). |
| * |
| * The only time when buffers full of inodes are fully recovered is |
| * when the buffer is full of newly allocated inodes. In this case |
| * the buffer will not be marked as an inode buffer and so will be |
| * sent to xlog_recover_do_reg_buffer() below during recovery. |
| */ |
| STATIC int |
| xlog_recover_do_inode_buffer( |
| xfs_mount_t *mp, |
| xlog_recover_item_t *item, |
| xfs_buf_t *bp, |
| xfs_buf_log_format_t *buf_f) |
| { |
| int i; |
| int item_index; |
| int bit; |
| int nbits; |
| int reg_buf_offset; |
| int reg_buf_bytes; |
| int next_unlinked_offset; |
| int inodes_per_buf; |
| xfs_agino_t *logged_nextp; |
| xfs_agino_t *buffer_nextp; |
| xfs_buf_log_format_v1_t *obuf_f; |
| unsigned int *data_map = NULL; |
| unsigned int map_size = 0; |
| |
| switch (buf_f->blf_type) { |
| case XFS_LI_BUF: |
| data_map = buf_f->blf_data_map; |
| map_size = buf_f->blf_map_size; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| data_map = obuf_f->blf_data_map; |
| map_size = obuf_f->blf_map_size; |
| break; |
| } |
| /* |
| * Set the variables corresponding to the current region to |
| * 0 so that we'll initialize them on the first pass through |
| * the loop. |
| */ |
| reg_buf_offset = 0; |
| reg_buf_bytes = 0; |
| bit = 0; |
| nbits = 0; |
| item_index = 0; |
| inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog; |
| for (i = 0; i < inodes_per_buf; i++) { |
| next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + |
| offsetof(xfs_dinode_t, di_next_unlinked); |
| |
| while (next_unlinked_offset >= |
| (reg_buf_offset + reg_buf_bytes)) { |
| /* |
| * The next di_next_unlinked field is beyond |
| * the current logged region. Find the next |
| * logged region that contains or is beyond |
| * the current di_next_unlinked field. |
| */ |
| bit += nbits; |
| bit = xfs_next_bit(data_map, map_size, bit); |
| |
| /* |
| * If there are no more logged regions in the |
| * buffer, then we're done. |
| */ |
| if (bit == -1) { |
| return 0; |
| } |
| |
| nbits = xfs_contig_bits(data_map, map_size, |
| bit); |
| ASSERT(nbits > 0); |
| reg_buf_offset = bit << XFS_BLI_SHIFT; |
| reg_buf_bytes = nbits << XFS_BLI_SHIFT; |
| item_index++; |
| } |
| |
| /* |
| * If the current logged region starts after the current |
| * di_next_unlinked field, then move on to the next |
| * di_next_unlinked field. |
| */ |
| if (next_unlinked_offset < reg_buf_offset) { |
| continue; |
| } |
| |
| ASSERT(item->ri_buf[item_index].i_addr != NULL); |
| ASSERT((item->ri_buf[item_index].i_len % XFS_BLI_CHUNK) == 0); |
| ASSERT((reg_buf_offset + reg_buf_bytes) <= XFS_BUF_COUNT(bp)); |
| |
| /* |
| * The current logged region contains a copy of the |
| * current di_next_unlinked field. Extract its value |
| * and copy it to the buffer copy. |
| */ |
| logged_nextp = (xfs_agino_t *) |
| ((char *)(item->ri_buf[item_index].i_addr) + |
| (next_unlinked_offset - reg_buf_offset)); |
| if (unlikely(*logged_nextp == 0)) { |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "bad inode buffer log record (ptr = 0x%p, bp = 0x%p). XFS trying to replay bad (0) inode di_next_unlinked field", |
| item, bp); |
| XFS_ERROR_REPORT("xlog_recover_do_inode_buf", |
| XFS_ERRLEVEL_LOW, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| |
| buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, |
| next_unlinked_offset); |
| *buffer_nextp = *logged_nextp; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Perform a 'normal' buffer recovery. Each logged region of the |
| * buffer should be copied over the corresponding region in the |
| * given buffer. The bitmap in the buf log format structure indicates |
| * where to place the logged data. |
| */ |
| /*ARGSUSED*/ |
| STATIC void |
| xlog_recover_do_reg_buffer( |
| xfs_mount_t *mp, |
| xlog_recover_item_t *item, |
| xfs_buf_t *bp, |
| xfs_buf_log_format_t *buf_f) |
| { |
| int i; |
| int bit; |
| int nbits; |
| xfs_buf_log_format_v1_t *obuf_f; |
| unsigned int *data_map = NULL; |
| unsigned int map_size = 0; |
| int error; |
| |
| switch (buf_f->blf_type) { |
| case XFS_LI_BUF: |
| data_map = buf_f->blf_data_map; |
| map_size = buf_f->blf_map_size; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| data_map = obuf_f->blf_data_map; |
| map_size = obuf_f->blf_map_size; |
| break; |
| } |
| bit = 0; |
| i = 1; /* 0 is the buf format structure */ |
| while (1) { |
| bit = xfs_next_bit(data_map, map_size, bit); |
| if (bit == -1) |
| break; |
| nbits = xfs_contig_bits(data_map, map_size, bit); |
| ASSERT(nbits > 0); |
| ASSERT(item->ri_buf[i].i_addr != 0); |
| ASSERT(item->ri_buf[i].i_len % XFS_BLI_CHUNK == 0); |
| ASSERT(XFS_BUF_COUNT(bp) >= |
| ((uint)bit << XFS_BLI_SHIFT)+(nbits<<XFS_BLI_SHIFT)); |
| |
| /* |
| * Do a sanity check if this is a dquot buffer. Just checking |
| * the first dquot in the buffer should do. XXXThis is |
| * probably a good thing to do for other buf types also. |
| */ |
| error = 0; |
| if (buf_f->blf_flags & |
| (XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) { |
| error = xfs_qm_dqcheck((xfs_disk_dquot_t *) |
| item->ri_buf[i].i_addr, |
| -1, 0, XFS_QMOPT_DOWARN, |
| "dquot_buf_recover"); |
| } |
| if (!error) |
| memcpy(xfs_buf_offset(bp, |
| (uint)bit << XFS_BLI_SHIFT), /* dest */ |
| item->ri_buf[i].i_addr, /* source */ |
| nbits<<XFS_BLI_SHIFT); /* length */ |
| i++; |
| bit += nbits; |
| } |
| |
| /* Shouldn't be any more regions */ |
| ASSERT(i == item->ri_total); |
| } |
| |
| /* |
| * Do some primitive error checking on ondisk dquot data structures. |
| */ |
| int |
| xfs_qm_dqcheck( |
| xfs_disk_dquot_t *ddq, |
| xfs_dqid_t id, |
| uint type, /* used only when IO_dorepair is true */ |
| uint flags, |
| char *str) |
| { |
| xfs_dqblk_t *d = (xfs_dqblk_t *)ddq; |
| int errs = 0; |
| |
| /* |
| * We can encounter an uninitialized dquot buffer for 2 reasons: |
| * 1. If we crash while deleting the quotainode(s), and those blks got |
| * used for user data. This is because we take the path of regular |
| * file deletion; however, the size field of quotainodes is never |
| * updated, so all the tricks that we play in itruncate_finish |
| * don't quite matter. |
| * |
| * 2. We don't play the quota buffers when there's a quotaoff logitem. |
| * But the allocation will be replayed so we'll end up with an |
| * uninitialized quota block. |
| * |
| * This is all fine; things are still consistent, and we haven't lost |
| * any quota information. Just don't complain about bad dquot blks. |
| */ |
| if (be16_to_cpu(ddq->d_magic) != XFS_DQUOT_MAGIC) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x", |
| str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC); |
| errs++; |
| } |
| if (ddq->d_version != XFS_DQUOT_VERSION) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x", |
| str, id, ddq->d_version, XFS_DQUOT_VERSION); |
| errs++; |
| } |
| |
| if (ddq->d_flags != XFS_DQ_USER && |
| ddq->d_flags != XFS_DQ_PROJ && |
| ddq->d_flags != XFS_DQ_GROUP) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : XFS dquot ID 0x%x, unknown flags 0x%x", |
| str, id, ddq->d_flags); |
| errs++; |
| } |
| |
| if (id != -1 && id != be32_to_cpu(ddq->d_id)) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : ondisk-dquot 0x%p, ID mismatch: " |
| "0x%x expected, found id 0x%x", |
| str, ddq, id, be32_to_cpu(ddq->d_id)); |
| errs++; |
| } |
| |
| if (!errs && ddq->d_id) { |
| if (ddq->d_blk_softlimit && |
| be64_to_cpu(ddq->d_bcount) >= |
| be64_to_cpu(ddq->d_blk_softlimit)) { |
| if (!ddq->d_btimer) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : Dquot ID 0x%x (0x%p) " |
| "BLK TIMER NOT STARTED", |
| str, (int)be32_to_cpu(ddq->d_id), ddq); |
| errs++; |
| } |
| } |
| if (ddq->d_ino_softlimit && |
| be64_to_cpu(ddq->d_icount) >= |
| be64_to_cpu(ddq->d_ino_softlimit)) { |
| if (!ddq->d_itimer) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : Dquot ID 0x%x (0x%p) " |
| "INODE TIMER NOT STARTED", |
| str, (int)be32_to_cpu(ddq->d_id), ddq); |
| errs++; |
| } |
| } |
| if (ddq->d_rtb_softlimit && |
| be64_to_cpu(ddq->d_rtbcount) >= |
| be64_to_cpu(ddq->d_rtb_softlimit)) { |
| if (!ddq->d_rtbtimer) { |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_ALERT, |
| "%s : Dquot ID 0x%x (0x%p) " |
| "RTBLK TIMER NOT STARTED", |
| str, (int)be32_to_cpu(ddq->d_id), ddq); |
| errs++; |
| } |
| } |
| } |
| |
| if (!errs || !(flags & XFS_QMOPT_DQREPAIR)) |
| return errs; |
| |
| if (flags & XFS_QMOPT_DOWARN) |
| cmn_err(CE_NOTE, "Re-initializing dquot ID 0x%x", id); |
| |
| /* |
| * Typically, a repair is only requested by quotacheck. |
| */ |
| ASSERT(id != -1); |
| ASSERT(flags & XFS_QMOPT_DQREPAIR); |
| memset(d, 0, sizeof(xfs_dqblk_t)); |
| |
| d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); |
| d->dd_diskdq.d_version = XFS_DQUOT_VERSION; |
| d->dd_diskdq.d_flags = type; |
| d->dd_diskdq.d_id = cpu_to_be32(id); |
| |
| return errs; |
| } |
| |
| /* |
| * Perform a dquot buffer recovery. |
| * Simple algorithm: if we have found a QUOTAOFF logitem of the same type |
| * (ie. USR or GRP), then just toss this buffer away; don't recover it. |
| * Else, treat it as a regular buffer and do recovery. |
| */ |
| STATIC void |
| xlog_recover_do_dquot_buffer( |
| xfs_mount_t *mp, |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| xfs_buf_t *bp, |
| xfs_buf_log_format_t *buf_f) |
| { |
| uint type; |
| |
| /* |
| * Filesystems are required to send in quota flags at mount time. |
| */ |
| if (mp->m_qflags == 0) { |
| return; |
| } |
| |
| type = 0; |
| if (buf_f->blf_flags & XFS_BLI_UDQUOT_BUF) |
| type |= XFS_DQ_USER; |
| if (buf_f->blf_flags & XFS_BLI_PDQUOT_BUF) |
| type |= XFS_DQ_PROJ; |
| if (buf_f->blf_flags & XFS_BLI_GDQUOT_BUF) |
| type |= XFS_DQ_GROUP; |
| /* |
| * This type of quotas was turned off, so ignore this buffer |
| */ |
| if (log->l_quotaoffs_flag & type) |
| return; |
| |
| xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
| } |
| |
| /* |
| * This routine replays a modification made to a buffer at runtime. |
| * There are actually two types of buffer, regular and inode, which |
| * are handled differently. Inode buffers are handled differently |
| * in that we only recover a specific set of data from them, namely |
| * the inode di_next_unlinked fields. This is because all other inode |
| * data is actually logged via inode records and any data we replay |
| * here which overlaps that may be stale. |
| * |
| * When meta-data buffers are freed at run time we log a buffer item |
| * with the XFS_BLI_CANCEL bit set to indicate that previous copies |
| * of the buffer in the log should not be replayed at recovery time. |
| * This is so that if the blocks covered by the buffer are reused for |
| * file data before we crash we don't end up replaying old, freed |
| * meta-data into a user's file. |
| * |
| * To handle the cancellation of buffer log items, we make two passes |
| * over the log during recovery. During the first we build a table of |
| * those buffers which have been cancelled, and during the second we |
| * only replay those buffers which do not have corresponding cancel |
| * records in the table. See xlog_recover_do_buffer_pass[1,2] above |
| * for more details on the implementation of the table of cancel records. |
| */ |
| STATIC int |
| xlog_recover_do_buffer_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| int pass) |
| { |
| xfs_buf_log_format_t *buf_f; |
| xfs_buf_log_format_v1_t *obuf_f; |
| xfs_mount_t *mp; |
| xfs_buf_t *bp; |
| int error; |
| int cancel; |
| xfs_daddr_t blkno; |
| int len; |
| ushort flags; |
| |
| buf_f = (xfs_buf_log_format_t *)item->ri_buf[0].i_addr; |
| |
| if (pass == XLOG_RECOVER_PASS1) { |
| /* |
| * In this pass we're only looking for buf items |
| * with the XFS_BLI_CANCEL bit set. |
| */ |
| xlog_recover_do_buffer_pass1(log, buf_f); |
| return 0; |
| } else { |
| /* |
| * In this pass we want to recover all the buffers |
| * which have not been cancelled and are not |
| * cancellation buffers themselves. The routine |
| * we call here will tell us whether or not to |
| * continue with the replay of this buffer. |
| */ |
| cancel = xlog_recover_do_buffer_pass2(log, buf_f); |
| if (cancel) { |
| return 0; |
| } |
| } |
| switch (buf_f->blf_type) { |
| case XFS_LI_BUF: |
| blkno = buf_f->blf_blkno; |
| len = buf_f->blf_len; |
| flags = buf_f->blf_flags; |
| break; |
| case XFS_LI_6_1_BUF: |
| case XFS_LI_5_3_BUF: |
| obuf_f = (xfs_buf_log_format_v1_t*)buf_f; |
| blkno = obuf_f->blf_blkno; |
| len = obuf_f->blf_len; |
| flags = obuf_f->blf_flags; |
| break; |
| default: |
| xfs_fs_cmn_err(CE_ALERT, log->l_mp, |
| "xfs_log_recover: unknown buffer type 0x%x, logdev %s", |
| buf_f->blf_type, log->l_mp->m_logname ? |
| log->l_mp->m_logname : "internal"); |
| XFS_ERROR_REPORT("xlog_recover_do_buffer_trans", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| |
| mp = log->l_mp; |
| if (flags & XFS_BLI_INODE_BUF) { |
| bp = xfs_buf_read_flags(mp->m_ddev_targp, blkno, len, |
| XFS_BUF_LOCK); |
| } else { |
| bp = xfs_buf_read(mp->m_ddev_targp, blkno, len, 0); |
| } |
| if (XFS_BUF_ISERROR(bp)) { |
| xfs_ioerror_alert("xlog_recover_do..(read#1)", log->l_mp, |
| bp, blkno); |
| error = XFS_BUF_GETERROR(bp); |
| xfs_buf_relse(bp); |
| return error; |
| } |
| |
| error = 0; |
| if (flags & XFS_BLI_INODE_BUF) { |
| error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
| } else if (flags & |
| (XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) { |
| xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
| } else { |
| xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
| } |
| if (error) |
| return XFS_ERROR(error); |
| |
| /* |
| * Perform delayed write on the buffer. Asynchronous writes will be |
| * slower when taking into account all the buffers to be flushed. |
| * |
| * Also make sure that only inode buffers with good sizes stay in |
| * the buffer cache. The kernel moves inodes in buffers of 1 block |
| * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode |
| * buffers in the log can be a different size if the log was generated |
| * by an older kernel using unclustered inode buffers or a newer kernel |
| * running with a different inode cluster size. Regardless, if the |
| * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) |
| * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep |
| * the buffer out of the buffer cache so that the buffer won't |
| * overlap with future reads of those inodes. |
| */ |
| if (XFS_DINODE_MAGIC == |
| INT_GET(*((__uint16_t *)(xfs_buf_offset(bp, 0))), ARCH_CONVERT) && |
| (XFS_BUF_COUNT(bp) != MAX(log->l_mp->m_sb.sb_blocksize, |
| (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { |
| XFS_BUF_STALE(bp); |
| error = xfs_bwrite(mp, bp); |
| } else { |
| ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL || |
| XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp); |
| XFS_BUF_SET_FSPRIVATE(bp, mp); |
| XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
| xfs_bdwrite(mp, bp); |
| } |
| |
| return (error); |
| } |
| |
| STATIC int |
| xlog_recover_do_inode_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| int pass) |
| { |
| xfs_inode_log_format_t *in_f; |
| xfs_mount_t *mp; |
| xfs_buf_t *bp; |
| xfs_imap_t imap; |
| xfs_dinode_t *dip; |
| xfs_ino_t ino; |
| int len; |
| xfs_caddr_t src; |
| xfs_caddr_t dest; |
| int error; |
| int attr_index; |
| uint fields; |
| xfs_dinode_core_t *dicp; |
| int need_free = 0; |
| |
| if (pass == XLOG_RECOVER_PASS1) { |
| return 0; |
| } |
| |
| if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
| in_f = (xfs_inode_log_format_t *)item->ri_buf[0].i_addr; |
| } else { |
| in_f = (xfs_inode_log_format_t *)kmem_alloc( |
| sizeof(xfs_inode_log_format_t), KM_SLEEP); |
| need_free = 1; |
| error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); |
| if (error) |
| goto error; |
| } |
| ino = in_f->ilf_ino; |
| mp = log->l_mp; |
| if (ITEM_TYPE(item) == XFS_LI_INODE) { |
| imap.im_blkno = (xfs_daddr_t)in_f->ilf_blkno; |
| imap.im_len = in_f->ilf_len; |
| imap.im_boffset = in_f->ilf_boffset; |
| } else { |
| /* |
| * It's an old inode format record. We don't know where |
| * its cluster is located on disk, and we can't allow |
| * xfs_imap() to figure it out because the inode btrees |
| * are not ready to be used. Therefore do not pass the |
| * XFS_IMAP_LOOKUP flag to xfs_imap(). This will give |
| * us only the single block in which the inode lives |
| * rather than its cluster, so we must make sure to |
| * invalidate the buffer when we write it out below. |
| */ |
| imap.im_blkno = 0; |
| xfs_imap(log->l_mp, NULL, ino, &imap, 0); |
| } |
| |
| /* |
| * Inode buffers can be freed, look out for it, |
| * and do not replay the inode. |
| */ |
| if (xlog_check_buffer_cancelled(log, imap.im_blkno, imap.im_len, 0)) { |
| error = 0; |
| goto error; |
| } |
| |
| bp = xfs_buf_read_flags(mp->m_ddev_targp, imap.im_blkno, imap.im_len, |
| XFS_BUF_LOCK); |
| if (XFS_BUF_ISERROR(bp)) { |
| xfs_ioerror_alert("xlog_recover_do..(read#2)", mp, |
| bp, imap.im_blkno); |
| error = XFS_BUF_GETERROR(bp); |
| xfs_buf_relse(bp); |
| goto error; |
| } |
| error = 0; |
| ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); |
| dip = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); |
| |
| /* |
| * Make sure the place we're flushing out to really looks |
| * like an inode! |
| */ |
| if (unlikely(INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC)) { |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld", |
| dip, bp, ino); |
| XFS_ERROR_REPORT("xlog_recover_do_inode_trans(1)", |
| XFS_ERRLEVEL_LOW, mp); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| dicp = (xfs_dinode_core_t*)(item->ri_buf[1].i_addr); |
| if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, ino %Ld", |
| item, ino); |
| XFS_ERROR_REPORT("xlog_recover_do_inode_trans(2)", |
| XFS_ERRLEVEL_LOW, mp); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| |
| /* Skip replay when the on disk inode is newer than the log one */ |
| if (dicp->di_flushiter < |
| INT_GET(dip->di_core.di_flushiter, ARCH_CONVERT)) { |
| /* |
| * Deal with the wrap case, DI_MAX_FLUSH is less |
| * than smaller numbers |
| */ |
| if ((INT_GET(dip->di_core.di_flushiter, ARCH_CONVERT) |
| == DI_MAX_FLUSH) && |
| (dicp->di_flushiter < (DI_MAX_FLUSH>>1))) { |
| /* do nothing */ |
| } else { |
| xfs_buf_relse(bp); |
| error = 0; |
| goto error; |
| } |
| } |
| /* Take the opportunity to reset the flush iteration count */ |
| dicp->di_flushiter = 0; |
| |
| if (unlikely((dicp->di_mode & S_IFMT) == S_IFREG)) { |
| if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
| (dicp->di_format != XFS_DINODE_FMT_BTREE)) { |
| XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(3)", |
| XFS_ERRLEVEL_LOW, mp, dicp); |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad regular inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", |
| item, dip, bp, ino); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| } else if (unlikely((dicp->di_mode & S_IFMT) == S_IFDIR)) { |
| if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
| (dicp->di_format != XFS_DINODE_FMT_BTREE) && |
| (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { |
| XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(4)", |
| XFS_ERRLEVEL_LOW, mp, dicp); |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad dir inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", |
| item, dip, bp, ino); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| } |
| if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ |
| XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(5)", |
| XFS_ERRLEVEL_LOW, mp, dicp); |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", |
| item, dip, bp, ino, |
| dicp->di_nextents + dicp->di_anextents, |
| dicp->di_nblocks); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { |
| XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(6)", |
| XFS_ERRLEVEL_LOW, mp, dicp); |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad inode log rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, forkoff 0x%x", |
| item, dip, bp, ino, dicp->di_forkoff); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| if (unlikely(item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t))) { |
| XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(7)", |
| XFS_ERRLEVEL_LOW, mp, dicp); |
| xfs_buf_relse(bp); |
| xfs_fs_cmn_err(CE_ALERT, mp, |
| "xfs_inode_recover: Bad inode log record length %d, rec ptr 0x%p", |
| item->ri_buf[1].i_len, item); |
| error = EFSCORRUPTED; |
| goto error; |
| } |
| |
| /* The core is in in-core format */ |
| xfs_xlate_dinode_core((xfs_caddr_t)&dip->di_core, |
| (xfs_dinode_core_t*)item->ri_buf[1].i_addr, -1); |
| |
| /* the rest is in on-disk format */ |
| if (item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t)) { |
| memcpy((xfs_caddr_t) dip + sizeof(xfs_dinode_core_t), |
| item->ri_buf[1].i_addr + sizeof(xfs_dinode_core_t), |
| item->ri_buf[1].i_len - sizeof(xfs_dinode_core_t)); |
| } |
| |
| fields = in_f->ilf_fields; |
| switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { |
| case XFS_ILOG_DEV: |
| INT_SET(dip->di_u.di_dev, ARCH_CONVERT, in_f->ilf_u.ilfu_rdev); |
| |
| break; |
| case XFS_ILOG_UUID: |
| dip->di_u.di_muuid = in_f->ilf_u.ilfu_uuid; |
| break; |
| } |
| |
| if (in_f->ilf_size == 2) |
| goto write_inode_buffer; |
| len = item->ri_buf[2].i_len; |
| src = item->ri_buf[2].i_addr; |
| ASSERT(in_f->ilf_size <= 4); |
| ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); |
| ASSERT(!(fields & XFS_ILOG_DFORK) || |
| (len == in_f->ilf_dsize)); |
| |
| switch (fields & XFS_ILOG_DFORK) { |
| case XFS_ILOG_DDATA: |
| case XFS_ILOG_DEXT: |
| memcpy(&dip->di_u, src, len); |
| break; |
| |
| case XFS_ILOG_DBROOT: |
| xfs_bmbt_to_bmdr((xfs_bmbt_block_t *)src, len, |
| &(dip->di_u.di_bmbt), |
| XFS_DFORK_DSIZE(dip, mp)); |
| break; |
| |
| default: |
| /* |
| * There are no data fork flags set. |
| */ |
| ASSERT((fields & XFS_ILOG_DFORK) == 0); |
| break; |
| } |
| |
| /* |
| * If we logged any attribute data, recover it. There may or |
| * may not have been any other non-core data logged in this |
| * transaction. |
| */ |
| if (in_f->ilf_fields & XFS_ILOG_AFORK) { |
| if (in_f->ilf_fields & XFS_ILOG_DFORK) { |
| attr_index = 3; |
| } else { |
| attr_index = 2; |
| } |
| len = item->ri_buf[attr_index].i_len; |
| src = item->ri_buf[attr_index].i_addr; |
| ASSERT(len == in_f->ilf_asize); |
| |
| switch (in_f->ilf_fields & XFS_ILOG_AFORK) { |
| case XFS_ILOG_ADATA: |
| case XFS_ILOG_AEXT: |
| dest = XFS_DFORK_APTR(dip); |
| ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); |
| memcpy(dest, src, len); |
| break; |
| |
| case XFS_ILOG_ABROOT: |
| dest = XFS_DFORK_APTR(dip); |
| xfs_bmbt_to_bmdr((xfs_bmbt_block_t *)src, len, |
| (xfs_bmdr_block_t*)dest, |
| XFS_DFORK_ASIZE(dip, mp)); |
| break; |
| |
| default: |
| xlog_warn("XFS: xlog_recover_do_inode_trans: Invalid flag"); |
| ASSERT(0); |
| xfs_buf_relse(bp); |
| error = EIO; |
| goto error; |
| } |
| } |
| |
| write_inode_buffer: |
| if (ITEM_TYPE(item) == XFS_LI_INODE) { |
| ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL || |
| XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp); |
| XFS_BUF_SET_FSPRIVATE(bp, mp); |
| XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
| xfs_bdwrite(mp, bp); |
| } else { |
| XFS_BUF_STALE(bp); |
| error = xfs_bwrite(mp, bp); |
| } |
| |
| error: |
| if (need_free) |
| kmem_free(in_f, sizeof(*in_f)); |
| return XFS_ERROR(error); |
| } |
| |
| /* |
| * Recover QUOTAOFF records. We simply make a note of it in the xlog_t |
| * structure, so that we know not to do any dquot item or dquot buffer recovery, |
| * of that type. |
| */ |
| STATIC int |
| xlog_recover_do_quotaoff_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| int pass) |
| { |
| xfs_qoff_logformat_t *qoff_f; |
| |
| if (pass == XLOG_RECOVER_PASS2) { |
| return (0); |
| } |
| |
| qoff_f = (xfs_qoff_logformat_t *)item->ri_buf[0].i_addr; |
| ASSERT(qoff_f); |
| |
| /* |
| * The logitem format's flag tells us if this was user quotaoff, |
| * group/project quotaoff or both. |
| */ |
| if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) |
| log->l_quotaoffs_flag |= XFS_DQ_USER; |
| if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
| log->l_quotaoffs_flag |= XFS_DQ_PROJ; |
| if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
| log->l_quotaoffs_flag |= XFS_DQ_GROUP; |
| |
| return (0); |
| } |
| |
| /* |
| * Recover a dquot record |
| */ |
| STATIC int |
| xlog_recover_do_dquot_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| int pass) |
| { |
| xfs_mount_t *mp; |
| xfs_buf_t *bp; |
| struct xfs_disk_dquot *ddq, *recddq; |
| int error; |
| xfs_dq_logformat_t *dq_f; |
| uint type; |
| |
| if (pass == XLOG_RECOVER_PASS1) { |
| return 0; |
| } |
| mp = log->l_mp; |
| |
| /* |
| * Filesystems are required to send in quota flags at mount time. |
| */ |
| if (mp->m_qflags == 0) |
| return (0); |
| |
| recddq = (xfs_disk_dquot_t *)item->ri_buf[1].i_addr; |
| ASSERT(recddq); |
| /* |
| * This type of quotas was turned off, so ignore this record. |
| */ |
| type = INT_GET(recddq->d_flags, ARCH_CONVERT) & |
| (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
| ASSERT(type); |
| if (log->l_quotaoffs_flag & type) |
| return (0); |
| |
| /* |
| * At this point we know that quota was _not_ turned off. |
| * Since the mount flags are not indicating to us otherwise, this |
| * must mean that quota is on, and the dquot needs to be replayed. |
| * Remember that we may not have fully recovered the superblock yet, |
| * so we can't do the usual trick of looking at the SB quota bits. |
| * |
| * The other possibility, of course, is that the quota subsystem was |
| * removed since the last mount - ENOSYS. |
| */ |
| dq_f = (xfs_dq_logformat_t *)item->ri_buf[0].i_addr; |
| ASSERT(dq_f); |
| if ((error = xfs_qm_dqcheck(recddq, |
| dq_f->qlf_id, |
| 0, XFS_QMOPT_DOWARN, |
| "xlog_recover_do_dquot_trans (log copy)"))) { |
| return XFS_ERROR(EIO); |
| } |
| ASSERT(dq_f->qlf_len == 1); |
| |
| error = xfs_read_buf(mp, mp->m_ddev_targp, |
| dq_f->qlf_blkno, |
| XFS_FSB_TO_BB(mp, dq_f->qlf_len), |
| 0, &bp); |
| if (error) { |
| xfs_ioerror_alert("xlog_recover_do..(read#3)", mp, |
| bp, dq_f->qlf_blkno); |
| return error; |
| } |
| ASSERT(bp); |
| ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); |
| |
| /* |
| * At least the magic num portion should be on disk because this |
| * was among a chunk of dquots created earlier, and we did some |
| * minimal initialization then. |
| */ |
| if (xfs_qm_dqcheck(ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
| "xlog_recover_do_dquot_trans")) { |
| xfs_buf_relse(bp); |
| return XFS_ERROR(EIO); |
| } |
| |
| memcpy(ddq, recddq, item->ri_buf[1].i_len); |
| |
| ASSERT(dq_f->qlf_size == 2); |
| ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL || |
| XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp); |
| XFS_BUF_SET_FSPRIVATE(bp, mp); |
| XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone); |
| xfs_bdwrite(mp, bp); |
| |
| return (0); |
| } |
| |
| /* |
| * This routine is called to create an in-core extent free intent |
| * item from the efi format structure which was logged on disk. |
| * It allocates an in-core efi, copies the extents from the format |
| * structure into it, and adds the efi to the AIL with the given |
| * LSN. |
| */ |
| STATIC int |
| xlog_recover_do_efi_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| xfs_lsn_t lsn, |
| int pass) |
| { |
| int error; |
| xfs_mount_t *mp; |
| xfs_efi_log_item_t *efip; |
| xfs_efi_log_format_t *efi_formatp; |
| SPLDECL(s); |
| |
| if (pass == XLOG_RECOVER_PASS1) { |
| return 0; |
| } |
| |
| efi_formatp = (xfs_efi_log_format_t *)item->ri_buf[0].i_addr; |
| |
| mp = log->l_mp; |
| efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
| if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
| &(efip->efi_format)))) { |
| xfs_efi_item_free(efip); |
| return error; |
| } |
| efip->efi_next_extent = efi_formatp->efi_nextents; |
| efip->efi_flags |= XFS_EFI_COMMITTED; |
| |
| AIL_LOCK(mp,s); |
| /* |
| * xfs_trans_update_ail() drops the AIL lock. |
| */ |
| xfs_trans_update_ail(mp, (xfs_log_item_t *)efip, lsn, s); |
| return 0; |
| } |
| |
| |
| /* |
| * This routine is called when an efd format structure is found in |
| * a committed transaction in the log. It's purpose is to cancel |
| * the corresponding efi if it was still in the log. To do this |
| * it searches the AIL for the efi with an id equal to that in the |
| * efd format structure. If we find it, we remove the efi from the |
| * AIL and free it. |
| */ |
| STATIC void |
| xlog_recover_do_efd_trans( |
| xlog_t *log, |
| xlog_recover_item_t *item, |
| int pass) |
| { |
| xfs_mount_t *mp; |
| xfs_efd_log_format_t *efd_formatp; |
| xfs_efi_log_item_t *efip = NULL; |
| xfs_log_item_t *lip; |
| int gen; |
| __uint64_t efi_id; |
| SPLDECL(s); |
| |
| if (pass == XLOG_RECOVER_PASS1) { |
| return; |
| } |
| |
| efd_formatp = (xfs_efd_log_format_t *)item->ri_buf[0].i_addr; |
| ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
| ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || |
| (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + |
| ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); |
| efi_id = efd_formatp->efd_efi_id; |
| |
| /* |
| * Search for the efi with the id in the efd format structure |
| * in the AIL. |
| */ |
| mp = log->l_mp; |
| AIL_LOCK(mp,s); |
| lip = xfs_trans_first_ail(mp, &gen); |
| while (lip != NULL) { |
| if (lip->li_type == XFS_LI_EFI) { |
| efip = (xfs_efi_log_item_t *)lip; |
| if (efip->efi_format.efi_id == efi_id) { |
| /* |
| * xfs_trans_delete_ail() drops the |
| * AIL lock. |
| */ |
| xfs_trans_delete_ail(mp, lip, s); |
| break; |
| } |
| } |
| lip = xfs_trans_next_ail(mp, lip, &gen, NULL); |
| } |
| |
| /* |
| * If we found it, then free it up. If it wasn't there, it |
| * must have been overwritten in the log. Oh well. |
| */ |
| if (lip != NULL) { |
| xfs_efi_item_free(efip); |
| } else { |
| AIL_UNLOCK(mp, s); |
| } |
| } |
| |
| /* |
| * Perform the transaction |
| * |
| * If the transaction modifies a buffer or inode, do it now. Otherwise, |
| * EFIs and EFDs get queued up by adding entries into the AIL for them. |
| */ |
| STATIC int |
| xlog_recover_do_trans( |
| xlog_t *log, |
| xlog_recover_t *trans, |
| int pass) |
| { |
| int error = 0; |
| xlog_recover_item_t *item, *first_item; |
| |
| if ((error = xlog_recover_reorder_trans(log, trans))) |
| return error; |
| first_item = item = trans->r_itemq; |
| do { |
| /* |
| * we don't need to worry about the block number being |
| * truncated in > 1 TB buffers because in user-land, |
| * we're now n32 or 64-bit so xfs_daddr_t is 64-bits so |
| * the blknos will get through the user-mode buffer |
| * cache properly. The only bad case is o32 kernels |
| * where xfs_daddr_t is 32-bits but mount will warn us |
| * off a > 1 TB filesystem before we get here. |
| */ |
| if ((ITEM_TYPE(item) == XFS_LI_BUF) || |
| (ITEM_TYPE(item) == XFS_LI_6_1_BUF) || |
| (ITEM_TYPE(item) == XFS_LI_5_3_BUF)) { |
| if ((error = xlog_recover_do_buffer_trans(log, item, |
| pass))) |
| break; |
| } else if ((ITEM_TYPE(item) == XFS_LI_INODE)) { |
| if ((error = xlog_recover_do_inode_trans(log, item, |
| pass))) |
| break; |
| } else if (ITEM_TYPE(item) == XFS_LI_EFI) { |
| if ((error = xlog_recover_do_efi_trans(log, item, trans->r_lsn, |
| pass))) |
| break; |
| } else if (ITEM_TYPE(item) == XFS_LI_EFD) { |
| xlog_recover_do_efd_trans(log, item, pass); |
| } else if (ITEM_TYPE(item) == XFS_LI_DQUOT) { |
| if ((error = xlog_recover_do_dquot_trans(log, item, |
| pass))) |
| break; |
| } else if ((ITEM_TYPE(item) == XFS_LI_QUOTAOFF)) { |
| if ((error = xlog_recover_do_quotaoff_trans(log, item, |
| pass))) |
| break; |
| } else { |
| xlog_warn("XFS: xlog_recover_do_trans"); |
| ASSERT(0); |
| error = XFS_ERROR(EIO); |
| break; |
| } |
| item = item->ri_next; |
| } while (first_item != item); |
| |
| return error; |
| } |
| |
| /* |
| * Free up any resources allocated by the transaction |
| * |
| * Remember that EFIs, EFDs, and IUNLINKs are handled later. |
| */ |
| STATIC void |
| xlog_recover_free_trans( |
| xlog_recover_t *trans) |
| { |
| xlog_recover_item_t *first_item, *item, *free_item; |
| int i; |
| |
| item = first_item = trans->r_itemq; |
| do { |
| free_item = item; |
| item = item->ri_next; |
| /* Free the regions in the item. */ |
| for (i = 0; i < free_item->ri_cnt; i++) { |
| kmem_free(free_item->ri_buf[i].i_addr, |
| free_item->ri_buf[i].i_len); |
| } |
| /* Free the item itself */ |
| kmem_free(free_item->ri_buf, |
| (free_item->ri_total * sizeof(xfs_log_iovec_t))); |
| kmem_free(free_item, sizeof(xlog_recover_item_t)); |
| } while (first_item != item); |
| /* Free the transaction recover structure */ |
| kmem_free(trans, sizeof(xlog_recover_t)); |
| } |
| |
| STATIC int |
| xlog_recover_commit_trans( |
| xlog_t *log, |
| xlog_recover_t **q, |
| xlog_recover_t *trans, |
| int pass) |
| { |
| int error; |
| |
| if ((error = xlog_recover_unlink_tid(q, trans))) |
| return error; |
| if ((error = xlog_recover_do_trans(log, trans, pass))) |
| return error; |
| xlog_recover_free_trans(trans); /* no error */ |
| return 0; |
| } |
| |
| STATIC int |
| xlog_recover_unmount_trans( |
| xlog_recover_t *trans) |
| { |
| /* Do nothing now */ |
| xlog_warn("XFS: xlog_recover_unmount_trans: Unmount LR"); |
| return 0; |
| } |
| |
| /* |
| * There are two valid states of the r_state field. 0 indicates that the |
| * transaction structure is in a normal state. We have either seen the |
| * start of the transaction or the last operation we added was not a partial |
| * operation. If the last operation we added to the transaction was a |
| * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. |
| * |
| * NOTE: skip LRs with 0 data length. |
| */ |
| STATIC int |
| xlog_recover_process_data( |
| xlog_t *log, |
| xlog_recover_t *rhash[], |
| xlog_rec_header_t *rhead, |
| xfs_caddr_t dp, |
| int pass) |
| { |
| xfs_caddr_t lp; |
| int num_logops; |
| xlog_op_header_t *ohead; |
| xlog_recover_t *trans; |
| xlog_tid_t tid; |
| int error; |
| unsigned long hash; |
| uint flags; |
| |
| lp = dp + INT_GET(rhead->h_len, ARCH_CONVERT); |
| num_logops = INT_GET(rhead->h_num_logops, ARCH_CONVERT); |
| |
| /* check the log format matches our own - else we can't recover */ |
| if (xlog_header_check_recover(log->l_mp, rhead)) |
| return (XFS_ERROR(EIO)); |
| |
| while ((dp < lp) && num_logops) { |
| ASSERT(dp + sizeof(xlog_op_header_t) <= lp); |
| ohead = (xlog_op_header_t *)dp; |
| dp += sizeof(xlog_op_header_t); |
| if (ohead->oh_clientid != XFS_TRANSACTION && |
| ohead->oh_clientid != XFS_LOG) { |
| xlog_warn( |
| "XFS: xlog_recover_process_data: bad clientid"); |
| ASSERT(0); |
| return (XFS_ERROR(EIO)); |
| } |
| tid = INT_GET(ohead->oh_tid, ARCH_CONVERT); |
| hash = XLOG_RHASH(tid); |
| trans = xlog_recover_find_tid(rhash[hash], tid); |
| if (trans == NULL) { /* not found; add new tid */ |
| if (ohead->oh_flags & XLOG_START_TRANS) |
| xlog_recover_new_tid(&rhash[hash], tid, |
| INT_GET(rhead->h_lsn, ARCH_CONVERT)); |
| } else { |
| ASSERT(dp+INT_GET(ohead->oh_len, ARCH_CONVERT) <= lp); |
| flags = ohead->oh_flags & ~XLOG_END_TRANS; |
| if (flags & XLOG_WAS_CONT_TRANS) |
| flags &= ~XLOG_CONTINUE_TRANS; |
| switch (flags) { |
| case XLOG_COMMIT_TRANS: |
| error = xlog_recover_commit_trans(log, |
| &rhash[hash], trans, pass); |
| break; |
| case XLOG_UNMOUNT_TRANS: |
| error = xlog_recover_unmount_trans(trans); |
| break; |
| case XLOG_WAS_CONT_TRANS: |
| error = xlog_recover_add_to_cont_trans(trans, |
| dp, INT_GET(ohead->oh_len, |
| ARCH_CONVERT)); |
| break; |
| case XLOG_START_TRANS: |
| xlog_warn( |
| "XFS: xlog_recover_process_data: bad transaction"); |
| ASSERT(0); |
| error = XFS_ERROR(EIO); |
| break; |
| case 0: |
| case XLOG_CONTINUE_TRANS: |
| error = xlog_recover_add_to_trans(trans, |
| dp, INT_GET(ohead->oh_len, |
| ARCH_CONVERT)); |
| break; |
| default: |
| xlog_warn( |
| "XFS: xlog_recover_process_data: bad flag"); |
| ASSERT(0); |
| error = XFS_ERROR(EIO); |
| break; |
| } |
| if (error) |
| return error; |
| } |
| dp += INT_GET(ohead->oh_len, ARCH_CONVERT); |
| num_logops--; |
| } |
| return 0; |
| } |
| |
| /* |
| * Process an extent free intent item that was recovered from |
| * the log. We need to free the extents that it describes. |
| */ |
| STATIC void |
| xlog_recover_process_efi( |
| xfs_mount_t *mp, |
| xfs_efi_log_item_t *efip) |
| { |
| xfs_efd_log_item_t *efdp; |
| xfs_trans_t *tp; |
| int i; |
| xfs_extent_t *extp; |
| xfs_fsblock_t startblock_fsb; |
| |
| ASSERT(!(efip->efi_flags & XFS_EFI_RECOVERED)); |
| |
| /* |
| * First check the validity of the extents described by the |
| * EFI. If any are bad, then assume that all are bad and |
| * just toss the EFI. |
| */ |
| for (i = 0; i < efip->efi_format.efi_nextents; i++) { |
| extp = &(efip->efi_format.efi_extents[i]); |
| startblock_fsb = XFS_BB_TO_FSB(mp, |
| XFS_FSB_TO_DADDR(mp, extp->ext_start)); |
| if ((startblock_fsb == 0) || |
| (extp->ext_len == 0) || |
| (startblock_fsb >= mp->m_sb.sb_dblocks) || |
| (extp->ext_len >= mp->m_sb.sb_agblocks)) { |
| /* |
| * This will pull the EFI from the AIL and |
| * free the memory associated with it. |
| */ |
| xfs_efi_release(efip, efip->efi_format.efi_nextents); |
| return; |
| } |
| } |
| |
| tp = xfs_trans_alloc(mp, 0); |
| xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 0, 0); |
| efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
| |
| for (i = 0; i < efip->efi_format.efi_nextents; i++) { |
| extp = &(efip->efi_format.efi_extents[i]); |
| xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
| xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
| extp->ext_len); |
| } |
| |
| efip->efi_flags |= XFS_EFI_RECOVERED; |
| xfs_trans_commit(tp, 0, NULL); |
| } |
| |
| /* |
| * Verify that once we've encountered something other than an EFI |
| * in the AIL that there are no more EFIs in the AIL. |
| */ |
| #if defined(DEBUG) |
| STATIC void |
| xlog_recover_check_ail( |
| xfs_mount_t *mp, |
| xfs_log_item_t *lip, |
| int gen) |
| { |
| int orig_gen = gen; |
| |
| do { |
| ASSERT(lip->li_type != XFS_LI_EFI); |
| lip = xfs_trans_next_ail(mp, lip, &gen, NULL); |
| /* |
| * The check will be bogus if we restart from the |
| * beginning of the AIL, so ASSERT that we don't. |
| * We never should since we're holding the AIL lock |
| * the entire time. |
| */ |
| ASSERT(gen == orig_gen); |
| } while (lip != NULL); |
| } |
| #endif /* DEBUG */ |
| |
| /* |
| * When this is called, all of the EFIs which did not have |
| * corresponding EFDs should be in the AIL. What we do now |
| * is free the extents associated with each one. |
| * |
| * Since we process the EFIs in normal transactions, they |
| * will be removed at some point after the commit. This prevents |
| * us from just walking down the list processing each one. |
| * We'll use a flag in the EFI to skip those that we've already |
| * processed and use the AIL iteration mechanism's generation |
| * count to try to speed this up at least a bit. |
| * |
| * When we start, we know that the EFIs are the only things in |
| * the AIL. As we process them, however, other items are added |
| * to the AIL. Since everything added to the AIL must come after |
| * everything already in the AIL, we stop processing as soon as |
| * we see something other than an EFI in the AIL. |
| */ |
| STATIC void |
| xlog_recover_process_efis( |
| xlog_t *log) |
| { |
| xfs_log_item_t *lip; |
| xfs_efi_log_item_t *efip; |
| int gen; |
| xfs_mount_t *mp; |
| SPLDECL(s); |
| |
| mp = log->l_mp; |
| AIL_LOCK(mp,s); |
| |
| lip = xfs_trans_first_ail(mp, &gen); |
| while (lip != NULL) { |
| /* |
| * We're done when we see something other than an EFI. |
| */ |
| if (lip->li_type != XFS_LI_EFI) { |
| xlog_recover_check_ail(mp, lip, gen); |
| break; |
| } |
| |
| /* |
| * Skip EFIs that we've already processed. |
| */ |
| efip = (xfs_efi_log_item_t *)lip; |
| if (efip->efi_flags & XFS_EFI_RECOVERED) { |
| lip = xfs_trans_next_ail(mp, lip, &gen, NULL); |
| continue; |
| } |
| |
| AIL_UNLOCK(mp, s); |
| xlog_recover_process_efi(mp, efip); |
| AIL_LOCK(mp,s); |
| lip = xfs_trans_next_ail(mp, lip, &gen, NULL); |
| } |
| AIL_UNLOCK(mp, s); |
| } |
| |
| /* |
| * This routine performs a transaction to null out a bad inode pointer |
| * in an agi unlinked inode hash bucket. |
| */ |
| STATIC void |
| xlog_recover_clear_agi_bucket( |
| xfs_mount_t *mp, |
| xfs_agnumber_t agno, |
| int bucket) |
| { |
| xfs_trans_t *tp; |
| xfs_agi_t *agi; |
| xfs_buf_t *agibp; |
| int offset; |
| int error; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); |
| xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), 0, 0, 0); |
| |
| error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, |
| XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0, &agibp); |
| if (error) { |
| xfs_trans_cancel(tp, XFS_TRANS_ABORT); |
| return; |
| } |
| |
| agi = XFS_BUF_TO_AGI(agibp); |
| if (be32_to_cpu(agi->agi_magicnum) != XFS_AGI_MAGIC) { |
| xfs_trans_cancel(tp, XFS_TRANS_ABORT); |
| return; |
| } |
| |
| agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
| offset = offsetof(xfs_agi_t, agi_unlinked) + |
| (sizeof(xfs_agino_t) * bucket); |
| xfs_trans_log_buf(tp, agibp, offset, |
| (offset + sizeof(xfs_agino_t) - 1)); |
| |
| (void) xfs_trans_commit(tp, 0, NULL); |
| } |
| |
| /* |
| * xlog_iunlink_recover |
| * |
| * This is called during recovery to process any inodes which |
| * we unlinked but not freed when the system crashed. These |
| * inodes will be on the lists in the AGI blocks. What we do |
| * here is scan all the AGIs and fully truncate and free any |
| * inodes found on the lists. Each inode is removed from the |
| * lists when it has been fully truncated and is freed. The |
| * freeing of the inode and its removal from the list must be |
| * atomic. |
| */ |
| void |
| xlog_recover_process_iunlinks( |
| xlog_t *log) |
| { |
| xfs_mount_t *mp; |
| xfs_agnumber_t agno; |
| xfs_agi_t *agi; |
| xfs_buf_t *agibp; |
| xfs_buf_t *ibp; |
| xfs_dinode_t *dip; |
| xfs_inode_t *ip; |
| xfs_agino_t agino; |
| xfs_ino_t ino; |
| int bucket; |
| int error; |
| uint mp_dmevmask; |
| |
| mp = log->l_mp; |
| |
| /* |
| * Prevent any DMAPI event from being sent while in this function. |
| */ |
| mp_dmevmask = mp->m_dmevmask; |
| mp->m_dmevmask = 0; |
| |
| for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| /* |
| * Find the agi for this ag. |
| */ |
| agibp = xfs_buf_read(mp->m_ddev_targp, |
| XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0); |
| if (XFS_BUF_ISERROR(agibp)) { |
| xfs_ioerror_alert("xlog_recover_process_iunlinks(#1)", |
| log->l_mp, agibp, |
| XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp))); |
| } |
| agi = XFS_BUF_TO_AGI(agibp); |
| ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agi->agi_magicnum)); |
| |
| for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { |
| |
| agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
| while (agino != NULLAGINO) { |
| |
| /* |
| * Release the agi buffer so that it can |
| * be acquired in the normal course of the |
| * transaction to truncate and free the inode. |
| */ |
| xfs_buf_relse(agibp); |
| |
| ino = XFS_AGINO_TO_INO(mp, agno, agino); |
| error = xfs_iget(mp, NULL, ino, 0, 0, &ip, 0); |
| ASSERT(error || (ip != NULL)); |
| |
| if (!error) { |
| /* |
| * Get the on disk inode to find the |
| * next inode in the bucket. |
| */ |
| error = xfs_itobp(mp, NULL, ip, &dip, |
| &ibp, 0, 0); |
| ASSERT(error || (dip != NULL)); |
| } |
| |
| if (!error) { |
| ASSERT(ip->i_d.di_nlink == 0); |
| |
| /* setup for the next pass */ |
| agino = INT_GET(dip->di_next_unlinked, |
| ARCH_CONVERT); |
| xfs_buf_relse(ibp); |
| /* |
| * Prevent any DMAPI event from |
| * being sent when the |
| * reference on the inode is |
| * dropped. |
| */ |
| ip->i_d.di_dmevmask = 0; |
| |
| /* |
| * If this is a new inode, handle |
| * it specially. Otherwise, |
| * just drop our reference to the |
| * inode. If there are no |
| * other references, this will |
| * send the inode to |
| * xfs_inactive() which will |
| * truncate the file and free |
| * the inode. |
| */ |
| if (ip->i_d.di_mode == 0) |
| xfs_iput_new(ip, 0); |
| else |
| VN_RELE(XFS_ITOV(ip)); |
| } else { |
| /* |
| * We can't read in the inode |
| * this bucket points to, or |
| * this inode is messed up. Just |
| * ditch this bucket of inodes. We |
| * will lose some inodes and space, |
| * but at least we won't hang. Call |
| * xlog_recover_clear_agi_bucket() |
| * to perform a transaction to clear |
| * the inode pointer in the bucket. |
| */ |
| xlog_recover_clear_agi_bucket(mp, agno, |
| bucket); |
| |
| agino = NULLAGINO; |
| } |
| |
| /* |
| * Reacquire the agibuffer and continue around |
| * the loop. |
| */ |
| agibp = xfs_buf_read(mp->m_ddev_targp, |
| XFS_AG_DADDR(mp, agno, |
| XFS_AGI_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0); |
| if (XFS_BUF_ISERROR(agibp)) { |
| xfs_ioerror_alert( |
| "xlog_recover_process_iunlinks(#2)", |
| log->l_mp, agibp, |
| XFS_AG_DADDR(mp, agno, |
| XFS_AGI_DADDR(mp))); |
| } |
| agi = XFS_BUF_TO_AGI(agibp); |
| ASSERT(XFS_AGI_MAGIC == be32_to_cpu( |
| agi->agi_magicnum)); |
| } |
| } |
| |
| /* |
| * Release the buffer for the current agi so we can |
| * go on to the next one. |
| */ |
| xfs_buf_relse(agibp); |
| } |
| |
| mp->m_dmevmask = mp_dmevmask; |
| } |
| |
| |
| #ifdef DEBUG |
| STATIC void |
| xlog_pack_data_checksum( |
| xlog_t *log, |
| xlog_in_core_t *iclog, |
| int size) |
| { |
| int i; |
| uint *up; |
| uint chksum = 0; |
| |
| up = (uint *)iclog->ic_datap; |
| /* divide length by 4 to get # words */ |
| for (i = 0; i < (size >> 2); i++) { |
| chksum ^= INT_GET(*up, ARCH_CONVERT); |
| up++; |
| } |
| INT_SET(iclog->ic_header.h_chksum, ARCH_CONVERT, chksum); |
| } |
| #else |
| #define xlog_pack_data_checksum(log, iclog, size) |
| #endif |
| |
| /* |
| * Stamp cycle number in every block |
| */ |
| void |
| xlog_pack_data( |
| xlog_t *log, |
| xlog_in_core_t *iclog, |
| int roundoff) |
| { |
| int i, j, k; |
| int size = iclog->ic_offset + roundoff; |
| uint cycle_lsn; |
| xfs_caddr_t dp; |
| xlog_in_core_2_t *xhdr; |
| |
| xlog_pack_data_checksum(log, iclog, size); |
| |
| cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); |
| |
| dp = iclog->ic_datap; |
| for (i = 0; i < BTOBB(size) && |
| i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
| iclog->ic_header.h_cycle_data[i] = *(uint *)dp; |
| *(uint *)dp = cycle_lsn; |
| dp += BBSIZE; |
| } |
| |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| xhdr = (xlog_in_core_2_t *)&iclog->ic_header; |
| for ( ; i < BTOBB(size); i++) { |
| j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| xhdr[j].hic_xheader.xh_cycle_data[k] = *(uint *)dp; |
| *(uint *)dp = cycle_lsn; |
| dp += BBSIZE; |
| } |
| |
| for (i = 1; i < log->l_iclog_heads; i++) { |
| xhdr[i].hic_xheader.xh_cycle = cycle_lsn; |
| } |
| } |
| } |
| |
| #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) |
| STATIC void |
| xlog_unpack_data_checksum( |
| xlog_rec_header_t *rhead, |
| xfs_caddr_t dp, |
| xlog_t *log) |
| { |
| uint *up = (uint *)dp; |
| uint chksum = 0; |
| int i; |
| |
| /* divide length by 4 to get # words */ |
| for (i=0; i < INT_GET(rhead->h_len, ARCH_CONVERT) >> 2; i++) { |
| chksum ^= INT_GET(*up, ARCH_CONVERT); |
| up++; |
| } |
| if (chksum != INT_GET(rhead->h_chksum, ARCH_CONVERT)) { |
| if (rhead->h_chksum || |
| ((log->l_flags & XLOG_CHKSUM_MISMATCH) == 0)) { |
| cmn_err(CE_DEBUG, |
| "XFS: LogR chksum mismatch: was (0x%x) is (0x%x)", |
| INT_GET(rhead->h_chksum, ARCH_CONVERT), chksum); |
| cmn_err(CE_DEBUG, |
| "XFS: Disregard message if filesystem was created with non-DEBUG kernel"); |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| cmn_err(CE_DEBUG, |
| "XFS: LogR this is a LogV2 filesystem"); |
| } |
| log->l_flags |= XLOG_CHKSUM_MISMATCH; |
| } |
| } |
| } |
| #else |
| #define xlog_unpack_data_checksum(rhead, dp, log) |
| #endif |
| |
| STATIC void |
| xlog_unpack_data( |
| xlog_rec_header_t *rhead, |
| xfs_caddr_t dp, |
| xlog_t *log) |
| { |
| int i, j, k; |
| xlog_in_core_2_t *xhdr; |
| |
| for (i = 0; i < BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)) && |
| i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
| *(uint *)dp = *(uint *)&rhead->h_cycle_data[i]; |
| dp += BBSIZE; |
| } |
| |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| xhdr = (xlog_in_core_2_t *)rhead; |
| for ( ; i < BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)); i++) { |
| j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| *(uint *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
| dp += BBSIZE; |
| } |
| } |
| |
| xlog_unpack_data_checksum(rhead, dp, log); |
| } |
| |
| STATIC int |
| xlog_valid_rec_header( |
| xlog_t *log, |
| xlog_rec_header_t *rhead, |
| xfs_daddr_t blkno) |
| { |
| int hlen; |
| |
| if (unlikely( |
| (INT_GET(rhead->h_magicno, ARCH_CONVERT) != |
| XLOG_HEADER_MAGIC_NUM))) { |
| XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| if (unlikely( |
| (!rhead->h_version || |
| (INT_GET(rhead->h_version, ARCH_CONVERT) & |
| (~XLOG_VERSION_OKBITS)) != 0))) { |
| xlog_warn("XFS: %s: unrecognised log version (%d).", |
| __FUNCTION__, INT_GET(rhead->h_version, ARCH_CONVERT)); |
| return XFS_ERROR(EIO); |
| } |
| |
| /* LR body must have data or it wouldn't have been written */ |
| hlen = INT_GET(rhead->h_len, ARCH_CONVERT); |
| if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
| XFS_ERROR_REPORT("xlog_valid_rec_header(2)", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { |
| XFS_ERROR_REPORT("xlog_valid_rec_header(3)", |
| XFS_ERRLEVEL_LOW, log->l_mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| return 0; |
| } |
| |
| /* |
| * Read the log from tail to head and process the log records found. |
| * Handle the two cases where the tail and head are in the same cycle |
| * and where the active portion of the log wraps around the end of |
| * the physical log separately. The pass parameter is passed through |
| * to the routines called to process the data and is not looked at |
| * here. |
| */ |
| STATIC int |
| xlog_do_recovery_pass( |
| xlog_t *log, |
| xfs_daddr_t head_blk, |
| xfs_daddr_t tail_blk, |
| int pass) |
| { |
| xlog_rec_header_t *rhead; |
| xfs_daddr_t blk_no; |
| xfs_caddr_t bufaddr, offset; |
| xfs_buf_t *hbp, *dbp; |
| int error = 0, h_size; |
| int bblks, split_bblks; |
| int hblks, split_hblks, wrapped_hblks; |
| xlog_recover_t *rhash[XLOG_RHASH_SIZE]; |
| |
| ASSERT(head_blk != tail_blk); |
| |
| /* |
| * Read the header of the tail block and get the iclog buffer size from |
| * h_size. Use this to tell how many sectors make up the log header. |
| */ |
| if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) { |
| /* |
| * When using variable length iclogs, read first sector of |
| * iclog header and extract the header size from it. Get a |
| * new hbp that is the correct size. |
| */ |
| hbp = xlog_get_bp(log, 1); |
| if (!hbp) |
| return ENOMEM; |
| if ((error = xlog_bread(log, tail_blk, 1, hbp))) |
| goto bread_err1; |
| offset = xlog_align(log, tail_blk, 1, hbp); |
| rhead = (xlog_rec_header_t *)offset; |
| error = xlog_valid_rec_header(log, rhead, tail_blk); |
| if (error) |
| goto bread_err1; |
| h_size = INT_GET(rhead->h_size, ARCH_CONVERT); |
| if ((INT_GET(rhead->h_version, ARCH_CONVERT) |
| & XLOG_VERSION_2) && |
| (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
| hblks = h_size / XLOG_HEADER_CYCLE_SIZE; |
| if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| hblks++; |
| xlog_put_bp(hbp); |
| hbp = xlog_get_bp(log, hblks); |
| } else { |
| hblks = 1; |
| } |
| } else { |
| ASSERT(log->l_sectbb_log == 0); |
| hblks = 1; |
| hbp = xlog_get_bp(log, 1); |
| h_size = XLOG_BIG_RECORD_BSIZE; |
| } |
| |
| if (!hbp) |
| return ENOMEM; |
| dbp = xlog_get_bp(log, BTOBB(h_size)); |
| if (!dbp) { |
| xlog_put_bp(hbp); |
| return ENOMEM; |
| } |
| |
| memset(rhash, 0, sizeof(rhash)); |
| if (tail_blk <= head_blk) { |
| for (blk_no = tail_blk; blk_no < head_blk; ) { |
| if ((error = xlog_bread(log, blk_no, hblks, hbp))) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, hblks, hbp); |
| rhead = (xlog_rec_header_t *)offset; |
| error = xlog_valid_rec_header(log, rhead, blk_no); |
| if (error) |
| goto bread_err2; |
| |
| /* blocks in data section */ |
| bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)); |
| error = xlog_bread(log, blk_no + hblks, bblks, dbp); |
| if (error) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no + hblks, bblks, dbp); |
| xlog_unpack_data(rhead, offset, log); |
| if ((error = xlog_recover_process_data(log, |
| rhash, rhead, offset, pass))) |
| goto bread_err2; |
| blk_no += bblks + hblks; |
| } |
| } else { |
| /* |
| * Perform recovery around the end of the physical log. |
| * When the head is not on the same cycle number as the tail, |
| * we can't do a sequential recovery as above. |
| */ |
| blk_no = tail_blk; |
| while (blk_no < log->l_logBBsize) { |
| /* |
| * Check for header wrapping around physical end-of-log |
| */ |
| offset = NULL; |
| split_hblks = 0; |
| wrapped_hblks = 0; |
| if (blk_no + hblks <= log->l_logBBsize) { |
| /* Read header in one read */ |
| error = xlog_bread(log, blk_no, hblks, hbp); |
| if (error) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, hblks, hbp); |
| } else { |
| /* This LR is split across physical log end */ |
| if (blk_no != log->l_logBBsize) { |
| /* some data before physical log end */ |
| ASSERT(blk_no <= INT_MAX); |
| split_hblks = log->l_logBBsize - (int)blk_no; |
| ASSERT(split_hblks > 0); |
| if ((error = xlog_bread(log, blk_no, |
| split_hblks, hbp))) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, |
| split_hblks, hbp); |
| } |
| /* |
| * Note: this black magic still works with |
| * large sector sizes (non-512) only because: |
| * - we increased the buffer size originally |
| * by 1 sector giving us enough extra space |
| * for the second read; |
| * - the log start is guaranteed to be sector |
| * aligned; |
| * - we read the log end (LR header start) |
| * _first_, then the log start (LR header end) |
| * - order is important. |
| */ |
| bufaddr = XFS_BUF_PTR(hbp); |
| XFS_BUF_SET_PTR(hbp, |
| bufaddr + BBTOB(split_hblks), |
| BBTOB(hblks - split_hblks)); |
| wrapped_hblks = hblks - split_hblks; |
| error = xlog_bread(log, 0, wrapped_hblks, hbp); |
| if (error) |
| goto bread_err2; |
| XFS_BUF_SET_PTR(hbp, bufaddr, BBTOB(hblks)); |
| if (!offset) |
| offset = xlog_align(log, 0, |
| wrapped_hblks, hbp); |
| } |
| rhead = (xlog_rec_header_t *)offset; |
| error = xlog_valid_rec_header(log, rhead, |
| split_hblks ? blk_no : 0); |
| if (error) |
| goto bread_err2; |
| |
| bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)); |
| blk_no += hblks; |
| |
| /* Read in data for log record */ |
| if (blk_no + bblks <= log->l_logBBsize) { |
| error = xlog_bread(log, blk_no, bblks, dbp); |
| if (error) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, bblks, dbp); |
| } else { |
| /* This log record is split across the |
| * physical end of log */ |
| offset = NULL; |
| split_bblks = 0; |
| if (blk_no != log->l_logBBsize) { |
| /* some data is before the physical |
| * end of log */ |
| ASSERT(!wrapped_hblks); |
| ASSERT(blk_no <= INT_MAX); |
| split_bblks = |
| log->l_logBBsize - (int)blk_no; |
| ASSERT(split_bblks > 0); |
| if ((error = xlog_bread(log, blk_no, |
| split_bblks, dbp))) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, |
| split_bblks, dbp); |
| } |
| /* |
| * Note: this black magic still works with |
| * large sector sizes (non-512) only because: |
| * - we increased the buffer size originally |
| * by 1 sector giving us enough extra space |
| * for the second read; |
| * - the log start is guaranteed to be sector |
| * aligned; |
| * - we read the log end (LR header start) |
| * _first_, then the log start (LR header end) |
| * - order is important. |
| */ |
| bufaddr = XFS_BUF_PTR(dbp); |
| XFS_BUF_SET_PTR(dbp, |
| bufaddr + BBTOB(split_bblks), |
| BBTOB(bblks - split_bblks)); |
| if ((error = xlog_bread(log, wrapped_hblks, |
| bblks - split_bblks, dbp))) |
| goto bread_err2; |
| XFS_BUF_SET_PTR(dbp, bufaddr, h_size); |
| if (!offset) |
| offset = xlog_align(log, wrapped_hblks, |
| bblks - split_bblks, dbp); |
| } |
| xlog_unpack_data(rhead, offset, log); |
| if ((error = xlog_recover_process_data(log, rhash, |
| rhead, offset, pass))) |
| goto bread_err2; |
| blk_no += bblks; |
| } |
| |
| ASSERT(blk_no >= log->l_logBBsize); |
| blk_no -= log->l_logBBsize; |
| |
| /* read first part of physical log */ |
| while (blk_no < head_blk) { |
| if ((error = xlog_bread(log, blk_no, hblks, hbp))) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no, hblks, hbp); |
| rhead = (xlog_rec_header_t *)offset; |
| error = xlog_valid_rec_header(log, rhead, blk_no); |
| if (error) |
| goto bread_err2; |
| bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)); |
| if ((error = xlog_bread(log, blk_no+hblks, bblks, dbp))) |
| goto bread_err2; |
| offset = xlog_align(log, blk_no+hblks, bblks, dbp); |
| xlog_unpack_data(rhead, offset, log); |
| if ((error = xlog_recover_process_data(log, rhash, |
| rhead, offset, pass))) |
| goto bread_err2; |
| blk_no += bblks + hblks; |
| } |
| } |
| |
| bread_err2: |
| xlog_put_bp(dbp); |
| bread_err1: |
| xlog_put_bp(hbp); |
| return error; |
| } |
| |
| /* |
| * Do the recovery of the log. We actually do this in two phases. |
| * The two passes are necessary in order to implement the function |
| * of cancelling a record written into the log. The first pass |
| * determines those things which have been cancelled, and the |
| * second pass replays log items normally except for those which |
| * have been cancelled. The handling of the replay and cancellations |
| * takes place in the log item type specific routines. |
| * |
| * The table of items which have cancel records in the log is allocated |
| * and freed at this level, since only here do we know when all of |
| * the log recovery has been completed. |
| */ |
| STATIC int |
| xlog_do_log_recovery( |
| xlog_t *log, |
| xfs_daddr_t head_blk, |
| xfs_daddr_t tail_blk) |
| { |
| int error; |
| |
| ASSERT(head_blk != tail_blk); |
| |
| /* |
| * First do a pass to find all of the cancelled buf log items. |
| * Store them in the buf_cancel_table for use in the second pass. |
| */ |
| log->l_buf_cancel_table = |
| (xfs_buf_cancel_t **)kmem_zalloc(XLOG_BC_TABLE_SIZE * |
| sizeof(xfs_buf_cancel_t*), |
| KM_SLEEP); |
| error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
| XLOG_RECOVER_PASS1); |
| if (error != 0) { |
| kmem_free(log->l_buf_cancel_table, |
| XLOG_BC_TABLE_SIZE * sizeof(xfs_buf_cancel_t*)); |
| log->l_buf_cancel_table = NULL; |
| return error; |
| } |
| /* |
| * Then do a second pass to actually recover the items in the log. |
| * When it is complete free the table of buf cancel items. |
| */ |
| error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
| XLOG_RECOVER_PASS2); |
| #ifdef DEBUG |
| if (!error) { |
| int i; |
| |
| for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
| ASSERT(log->l_buf_cancel_table[i] == NULL); |
| } |
| #endif /* DEBUG */ |
| |
| kmem_free(log->l_buf_cancel_table, |
| XLOG_BC_TABLE_SIZE * sizeof(xfs_buf_cancel_t*)); |
| log->l_buf_cancel_table = NULL; |
| |
| return error; |
| } |
| |
| /* |
| * Do the actual recovery |
| */ |
| STATIC int |
| xlog_do_recover( |
| xlog_t *log, |
| xfs_daddr_t head_blk, |
| xfs_daddr_t tail_blk) |
| { |
| int error; |
| xfs_buf_t *bp; |
| xfs_sb_t *sbp; |
| |
| /* |
| * First replay the images in the log. |
| */ |
| error = xlog_do_log_recovery(log, head_blk, tail_blk); |
| if (error) { |
| return error; |
| } |
| |
| XFS_bflush(log->l_mp->m_ddev_targp); |
| |
| /* |
| * If IO errors happened during recovery, bail out. |
| */ |
| if (XFS_FORCED_SHUTDOWN(log->l_mp)) { |
| return (EIO); |
| } |
| |
| /* |
| * We now update the tail_lsn since much of the recovery has completed |
| * and there may be space available to use. If there were no extent |
| * or iunlinks, we can free up the entire log and set the tail_lsn to |
| * be the last_sync_lsn. This was set in xlog_find_tail to be the |
| * lsn of the last known good LR on disk. If there are extent frees |
| * or iunlinks they will have some entries in the AIL; so we look at |
| * the AIL to determine how to set the tail_lsn. |
| */ |
| xlog_assign_tail_lsn(log->l_mp); |
| |
| /* |
| * Now that we've finished replaying all buffer and inode |
| * updates, re-read in the superblock. |
| */ |
| bp = xfs_getsb(log->l_mp, 0); |
| XFS_BUF_UNDONE(bp); |
| XFS_BUF_READ(bp); |
| xfsbdstrat(log->l_mp, bp); |
| if ((error = xfs_iowait(bp))) { |
| xfs_ioerror_alert("xlog_do_recover", |
| log->l_mp, bp, XFS_BUF_ADDR(bp)); |
| ASSERT(0); |
| xfs_buf_relse(bp); |
| return error; |
| } |
| |
| /* Convert superblock from on-disk format */ |
| sbp = &log->l_mp->m_sb; |
| xfs_xlatesb(XFS_BUF_TO_SBP(bp), sbp, 1, XFS_SB_ALL_BITS); |
| ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
| ASSERT(XFS_SB_GOOD_VERSION(sbp)); |
| xfs_buf_relse(bp); |
| |
| xlog_recover_check_summary(log); |
| |
| /* Normal transactions can now occur */ |
| log->l_flags &= ~XLOG_ACTIVE_RECOVERY; |
| return 0; |
| } |
| |
| /* |
| * Perform recovery and re-initialize some log variables in xlog_find_tail. |
| * |
| * Return error or zero. |
| */ |
| int |
| xlog_recover( |
| xlog_t *log) |
| { |
| xfs_daddr_t head_blk, tail_blk; |
| int error; |
| |
| /* find the tail of the log */ |
| if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
| return error; |
| |
| if (tail_blk != head_blk) { |
| /* There used to be a comment here: |
| * |
| * disallow recovery on read-only mounts. note -- mount |
| * checks for ENOSPC and turns it into an intelligent |
| * error message. |
| * ...but this is no longer true. Now, unless you specify |
| * NORECOVERY (in which case this function would never be |
| * called), we just go ahead and recover. We do this all |
| * under the vfs layer, so we can get away with it unless |
| * the device itself is read-only, in which case we fail. |
| */ |
| if ((error = xfs_dev_is_read_only(log->l_mp, |
| "recovery required"))) { |
| return error; |
| } |
| |
| cmn_err(CE_NOTE, |
| "Starting XFS recovery on filesystem: %s (logdev: %s)", |
| log->l_mp->m_fsname, log->l_mp->m_logname ? |
| log->l_mp->m_logname : "internal"); |
| |
| error = xlog_do_recover(log, head_blk, tail_blk); |
| log->l_flags |= XLOG_RECOVERY_NEEDED; |
| } |
| return error; |
| } |
| |
| /* |
| * In the first part of recovery we replay inodes and buffers and build |
| * up the list of extent free items which need to be processed. Here |
| * we process the extent free items and clean up the on disk unlinked |
| * inode lists. This is separated from the first part of recovery so |
| * that the root and real-time bitmap inodes can be read in from disk in |
| * between the two stages. This is necessary so that we can free space |
| * in the real-time portion of the file system. |
| */ |
| int |
| xlog_recover_finish( |
| xlog_t *log, |
| int mfsi_flags) |
| { |
| /* |
| * Now we're ready to do the transactions needed for the |
| * rest of recovery. Start with completing all the extent |
| * free intent records and then process the unlinked inode |
| * lists. At this point, we essentially run in normal mode |
| * except that we're still performing recovery actions |
| * rather than accepting new requests. |
| */ |
| if (log->l_flags & XLOG_RECOVERY_NEEDED) { |
| xlog_recover_process_efis(log); |
| /* |
| * Sync the log to get all the EFIs out of the AIL. |
| * This isn't absolutely necessary, but it helps in |
| * case the unlink transactions would have problems |
| * pushing the EFIs out of the way. |
| */ |
| xfs_log_force(log->l_mp, (xfs_lsn_t)0, |
| (XFS_LOG_FORCE | XFS_LOG_SYNC)); |
| |
| if ( (mfsi_flags & XFS_MFSI_NOUNLINK) == 0 ) { |
| xlog_recover_process_iunlinks(log); |
| } |
| |
| xlog_recover_check_summary(log); |
| |
| cmn_err(CE_NOTE, |
| "Ending XFS recovery on filesystem: %s (logdev: %s)", |
| log->l_mp->m_fsname, log->l_mp->m_logname ? |
| log->l_mp->m_logname : "internal"); |
| log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
| } else { |
| cmn_err(CE_DEBUG, |
| "!Ending clean XFS mount for filesystem: %s", |
| log->l_mp->m_fsname); |
| } |
| return 0; |
| } |
| |
| |
| #if defined(DEBUG) |
| /* |
| * Read all of the agf and agi counters and check that they |
| * are consistent with the superblock counters. |
| */ |
| void |
| xlog_recover_check_summary( |
| xlog_t *log) |
| { |
| xfs_mount_t *mp; |
| xfs_agf_t *agfp; |
| xfs_agi_t *agip; |
| xfs_buf_t *agfbp; |
| xfs_buf_t *agibp; |
| xfs_daddr_t agfdaddr; |
| xfs_daddr_t agidaddr; |
| xfs_buf_t *sbbp; |
| #ifdef XFS_LOUD_RECOVERY |
| xfs_sb_t *sbp; |
| #endif |
| xfs_agnumber_t agno; |
| __uint64_t freeblks; |
| __uint64_t itotal; |
| __uint64_t ifree; |
| |
| mp = log->l_mp; |
| |
| freeblks = 0LL; |
| itotal = 0LL; |
| ifree = 0LL; |
| for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| agfdaddr = XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)); |
| agfbp = xfs_buf_read(mp->m_ddev_targp, agfdaddr, |
| XFS_FSS_TO_BB(mp, 1), 0); |
| if (XFS_BUF_ISERROR(agfbp)) { |
| xfs_ioerror_alert("xlog_recover_check_summary(agf)", |
| mp, agfbp, agfdaddr); |
| } |
| agfp = XFS_BUF_TO_AGF(agfbp); |
| ASSERT(XFS_AGF_MAGIC == be32_to_cpu(agfp->agf_magicnum)); |
| ASSERT(XFS_AGF_GOOD_VERSION(be32_to_cpu(agfp->agf_versionnum))); |
| ASSERT(be32_to_cpu(agfp->agf_seqno) == agno); |
| |
| freeblks += be32_to_cpu(agfp->agf_freeblks) + |
| be32_to_cpu(agfp->agf_flcount); |
| xfs_buf_relse(agfbp); |
| |
| agidaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); |
| agibp = xfs_buf_read(mp->m_ddev_targp, agidaddr, |
| XFS_FSS_TO_BB(mp, 1), 0); |
| if (XFS_BUF_ISERROR(agibp)) { |
| xfs_ioerror_alert("xlog_recover_check_summary(agi)", |
| mp, agibp, agidaddr); |
| } |
| agip = XFS_BUF_TO_AGI(agibp); |
| ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agip->agi_magicnum)); |
| ASSERT(XFS_AGI_GOOD_VERSION(be32_to_cpu(agip->agi_versionnum))); |
| ASSERT(be32_to_cpu(agip->agi_seqno) == agno); |
| |
| itotal += be32_to_cpu(agip->agi_count); |
| ifree += be32_to_cpu(agip->agi_freecount); |
| xfs_buf_relse(agibp); |
| } |
| |
| sbbp = xfs_getsb(mp, 0); |
| #ifdef XFS_LOUD_RECOVERY |
| sbp = &mp->m_sb; |
| xfs_xlatesb(XFS_BUF_TO_SBP(sbbp), sbp, 1, XFS_SB_ALL_BITS); |
| cmn_err(CE_NOTE, |
| "xlog_recover_check_summary: sb_icount %Lu itotal %Lu", |
| sbp->sb_icount, itotal); |
| cmn_err(CE_NOTE, |
| "xlog_recover_check_summary: sb_ifree %Lu itotal %Lu", |
| sbp->sb_ifree, ifree); |
| cmn_err(CE_NOTE, |
| "xlog_recover_check_summary: sb_fdblocks %Lu freeblks %Lu", |
| sbp->sb_fdblocks, freeblks); |
| #if 0 |
| /* |
| * This is turned off until I account for the allocation |
| * btree blocks which live in free space. |
| */ |
| ASSERT(sbp->sb_icount == itotal); |
| ASSERT(sbp->sb_ifree == ifree); |
| ASSERT(sbp->sb_fdblocks == freeblks); |
| #endif |
| #endif |
| xfs_buf_relse(sbbp); |
| } |
| #endif /* DEBUG */ |