Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Tim Shimmin | 87c199c | 2006-06-09 14:56:16 +1000 | [diff] [blame] | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_trans.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 25 | #include "xfs_sb.h" |
| 26 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_mount.h" |
| 28 | #include "xfs_error.h" |
| 29 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 30 | #include "xfs_alloc_btree.h" |
| 31 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_inode_item.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_ialloc.h" |
| 37 | #include "xfs_log_priv.h" |
| 38 | #include "xfs_buf_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_log_recover.h" |
| 40 | #include "xfs_extfree_item.h" |
| 41 | #include "xfs_trans_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include "xfs_quota.h" |
| 43 | #include "xfs_rw.h" |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 44 | #include "xfs_utils.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 45 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | STATIC int xlog_find_zeroed(xlog_t *, xfs_daddr_t *); |
| 48 | STATIC int xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #if defined(DEBUG) |
| 50 | STATIC void xlog_recover_check_summary(xlog_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #else |
| 52 | #define xlog_recover_check_summary(log) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #endif |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 56 | * This structure is used during recovery to record the buf log items which |
| 57 | * have been canceled and should not be replayed. |
| 58 | */ |
| 59 | struct xfs_buf_cancel { |
| 60 | xfs_daddr_t bc_blkno; |
| 61 | uint bc_len; |
| 62 | int bc_refcount; |
| 63 | struct list_head bc_list; |
| 64 | }; |
| 65 | |
| 66 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | * Sector aligned buffer routines for buffer create/read/write/access |
| 68 | */ |
| 69 | |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 70 | /* |
| 71 | * Verify the given count of basic blocks is valid number of blocks |
| 72 | * to specify for an operation involving the given XFS log buffer. |
| 73 | * Returns nonzero if the count is valid, 0 otherwise. |
| 74 | */ |
| 75 | |
| 76 | static inline int |
| 77 | xlog_buf_bbcount_valid( |
| 78 | xlog_t *log, |
| 79 | int bbcount) |
| 80 | { |
| 81 | return bbcount > 0 && bbcount <= log->l_logBBsize; |
| 82 | } |
| 83 | |
Alex Elder | 36adecf | 2010-04-13 15:21:13 +1000 | [diff] [blame] | 84 | /* |
| 85 | * Allocate a buffer to hold log data. The buffer needs to be able |
| 86 | * to map to a range of nbblks basic blocks at any valid (basic |
| 87 | * block) offset within the log. |
| 88 | */ |
Eric Sandeen | 5d77c0d | 2009-11-19 15:52:00 +0000 | [diff] [blame] | 89 | STATIC xfs_buf_t * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | xlog_get_bp( |
| 91 | xlog_t *log, |
Dave Chinner | 3228149 | 2009-01-22 15:37:47 +1100 | [diff] [blame] | 92 | int nbblks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Christoph Hellwig | c8da0fa | 2011-07-08 14:36:25 +0200 | [diff] [blame] | 94 | struct xfs_buf *bp; |
| 95 | |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 96 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 97 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 98 | nbblks); |
| 99 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); |
Dave Chinner | 3228149 | 2009-01-22 15:37:47 +1100 | [diff] [blame] | 100 | return NULL; |
| 101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Alex Elder | 36adecf | 2010-04-13 15:21:13 +1000 | [diff] [blame] | 103 | /* |
| 104 | * We do log I/O in units of log sectors (a power-of-2 |
| 105 | * multiple of the basic block size), so we round up the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 106 | * requested size to accommodate the basic blocks required |
Alex Elder | 36adecf | 2010-04-13 15:21:13 +1000 | [diff] [blame] | 107 | * for complete log sectors. |
| 108 | * |
| 109 | * In addition, the buffer may be used for a non-sector- |
| 110 | * aligned block offset, in which case an I/O of the |
| 111 | * requested size could extend beyond the end of the |
| 112 | * buffer. If the requested size is only 1 basic block it |
| 113 | * will never straddle a sector boundary, so this won't be |
| 114 | * an issue. Nor will this be a problem if the log I/O is |
| 115 | * done in basic blocks (sector size 1). But otherwise we |
| 116 | * extend the buffer by one extra log sector to ensure |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 117 | * there's space to accommodate this possibility. |
Alex Elder | 36adecf | 2010-04-13 15:21:13 +1000 | [diff] [blame] | 118 | */ |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 119 | if (nbblks > 1 && log->l_sectBBsize > 1) |
| 120 | nbblks += log->l_sectBBsize; |
| 121 | nbblks = round_up(nbblks, log->l_sectBBsize); |
Alex Elder | 36adecf | 2010-04-13 15:21:13 +1000 | [diff] [blame] | 122 | |
Christoph Hellwig | c8da0fa | 2011-07-08 14:36:25 +0200 | [diff] [blame] | 123 | bp = xfs_buf_get_uncached(log->l_mp->m_logdev_targp, BBTOB(nbblks), 0); |
| 124 | if (bp) |
| 125 | xfs_buf_unlock(bp); |
| 126 | return bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
Eric Sandeen | 5d77c0d | 2009-11-19 15:52:00 +0000 | [diff] [blame] | 129 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | xlog_put_bp( |
| 131 | xfs_buf_t *bp) |
| 132 | { |
| 133 | xfs_buf_free(bp); |
| 134 | } |
| 135 | |
Alex Elder | 48389ef | 2010-04-20 17:10:21 +1000 | [diff] [blame] | 136 | /* |
| 137 | * Return the address of the start of the given block number's data |
| 138 | * in a log buffer. The buffer covers a log sector-aligned region. |
| 139 | */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 140 | STATIC xfs_caddr_t |
| 141 | xlog_align( |
| 142 | xlog_t *log, |
| 143 | xfs_daddr_t blk_no, |
| 144 | int nbblks, |
| 145 | xfs_buf_t *bp) |
| 146 | { |
Christoph Hellwig | fdc07f4 | 2010-05-10 17:28:14 +0000 | [diff] [blame] | 147 | xfs_daddr_t offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 148 | |
Christoph Hellwig | fdc07f4 | 2010-05-10 17:28:14 +0000 | [diff] [blame] | 149 | ASSERT(BBTOB(offset + nbblks) <= XFS_BUF_SIZE(bp)); |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 150 | return bp->b_addr + BBTOB(offset); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 151 | } |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | /* |
| 155 | * nbblks should be uint, but oh well. Just want to catch that 32-bit length. |
| 156 | */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 157 | STATIC int |
| 158 | xlog_bread_noalign( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | xlog_t *log, |
| 160 | xfs_daddr_t blk_no, |
| 161 | int nbblks, |
| 162 | xfs_buf_t *bp) |
| 163 | { |
| 164 | int error; |
| 165 | |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 166 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 167 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 168 | nbblks); |
| 169 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); |
Dave Chinner | 3228149 | 2009-01-22 15:37:47 +1100 | [diff] [blame] | 170 | return EFSCORRUPTED; |
| 171 | } |
| 172 | |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 173 | blk_no = round_down(blk_no, log->l_sectBBsize); |
| 174 | nbblks = round_up(nbblks, log->l_sectBBsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | ASSERT(nbblks > 0); |
| 177 | ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); |
| 180 | XFS_BUF_READ(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | xfsbdstrat(log->l_mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 184 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 185 | if (error) |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 186 | xfs_buf_ioerror_alert(bp, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | return error; |
| 188 | } |
| 189 | |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 190 | STATIC int |
| 191 | xlog_bread( |
| 192 | xlog_t *log, |
| 193 | xfs_daddr_t blk_no, |
| 194 | int nbblks, |
| 195 | xfs_buf_t *bp, |
| 196 | xfs_caddr_t *offset) |
| 197 | { |
| 198 | int error; |
| 199 | |
| 200 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); |
| 201 | if (error) |
| 202 | return error; |
| 203 | |
| 204 | *offset = xlog_align(log, blk_no, nbblks, bp); |
| 205 | return 0; |
| 206 | } |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | /* |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 209 | * Read at an offset into the buffer. Returns with the buffer in it's original |
| 210 | * state regardless of the result of the read. |
| 211 | */ |
| 212 | STATIC int |
| 213 | xlog_bread_offset( |
| 214 | xlog_t *log, |
| 215 | xfs_daddr_t blk_no, /* block to read from */ |
| 216 | int nbblks, /* blocks to read */ |
| 217 | xfs_buf_t *bp, |
| 218 | xfs_caddr_t offset) |
| 219 | { |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 220 | xfs_caddr_t orig_offset = bp->b_addr; |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 221 | int orig_len = bp->b_buffer_length; |
| 222 | int error, error2; |
| 223 | |
Chandra Seetharaman | 02fe03d | 2011-07-22 23:40:22 +0000 | [diff] [blame] | 224 | error = xfs_buf_associate_memory(bp, offset, BBTOB(nbblks)); |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 225 | if (error) |
| 226 | return error; |
| 227 | |
| 228 | error = xlog_bread_noalign(log, blk_no, nbblks, bp); |
| 229 | |
| 230 | /* must reset buffer pointer even on error */ |
Chandra Seetharaman | 02fe03d | 2011-07-22 23:40:22 +0000 | [diff] [blame] | 231 | error2 = xfs_buf_associate_memory(bp, orig_offset, orig_len); |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 232 | if (error) |
| 233 | return error; |
| 234 | return error2; |
| 235 | } |
| 236 | |
| 237 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | * Write out the buffer at the given block for the given number of blocks. |
| 239 | * The buffer is kept locked across the write and is returned locked. |
| 240 | * This can only be used for synchronous log writes. |
| 241 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 242 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | xlog_bwrite( |
| 244 | xlog_t *log, |
| 245 | xfs_daddr_t blk_no, |
| 246 | int nbblks, |
| 247 | xfs_buf_t *bp) |
| 248 | { |
| 249 | int error; |
| 250 | |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 251 | if (!xlog_buf_bbcount_valid(log, nbblks)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 252 | xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer", |
Alex Elder | ff30a62 | 2010-04-13 15:22:58 +1000 | [diff] [blame] | 253 | nbblks); |
| 254 | XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp); |
Dave Chinner | 3228149 | 2009-01-22 15:37:47 +1100 | [diff] [blame] | 255 | return EFSCORRUPTED; |
| 256 | } |
| 257 | |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 258 | blk_no = round_down(blk_no, log->l_sectBBsize); |
| 259 | nbblks = round_up(nbblks, log->l_sectBBsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | ASSERT(nbblks > 0); |
| 262 | ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp)); |
| 263 | |
| 264 | XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no); |
| 265 | XFS_BUF_ZEROFLAGS(bp); |
Chandra Seetharaman | 72790aa | 2011-07-22 23:40:04 +0000 | [diff] [blame] | 266 | xfs_buf_hold(bp); |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 267 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | XFS_BUF_SET_COUNT(bp, BBTOB(nbblks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Christoph Hellwig | c2b006c | 2011-08-23 08:28:07 +0000 | [diff] [blame] | 270 | error = xfs_bwrite(bp); |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 271 | if (error) |
| 272 | xfs_buf_ioerror_alert(bp, __func__); |
Christoph Hellwig | c2b006c | 2011-08-23 08:28:07 +0000 | [diff] [blame] | 273 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | return error; |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | #ifdef DEBUG |
| 278 | /* |
| 279 | * dump debug superblock and log record information |
| 280 | */ |
| 281 | STATIC void |
| 282 | xlog_header_check_dump( |
| 283 | xfs_mount_t *mp, |
| 284 | xlog_rec_header_t *head) |
| 285 | { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 286 | xfs_debug(mp, "%s: SB : uuid = %pU, fmt = %d\n", |
Joe Perches | 03daa57 | 2009-12-14 18:01:10 -0800 | [diff] [blame] | 287 | __func__, &mp->m_sb.sb_uuid, XLOG_FMT); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 288 | xfs_debug(mp, " log : uuid = %pU, fmt = %d\n", |
Joe Perches | 03daa57 | 2009-12-14 18:01:10 -0800 | [diff] [blame] | 289 | &head->h_fs_uuid, be32_to_cpu(head->h_fmt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | #else |
| 292 | #define xlog_header_check_dump(mp, head) |
| 293 | #endif |
| 294 | |
| 295 | /* |
| 296 | * check log record header for recovery |
| 297 | */ |
| 298 | STATIC int |
| 299 | xlog_header_check_recover( |
| 300 | xfs_mount_t *mp, |
| 301 | xlog_rec_header_t *head) |
| 302 | { |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 303 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
| 305 | /* |
| 306 | * IRIX doesn't write the h_fmt field and leaves it zeroed |
| 307 | * (XLOG_FMT_UNKNOWN). This stops us from trying to recover |
| 308 | * a dirty log created in IRIX. |
| 309 | */ |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 310 | if (unlikely(head->h_fmt != cpu_to_be32(XLOG_FMT))) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 311 | xfs_warn(mp, |
| 312 | "dirty log written in incompatible format - can't recover"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | xlog_header_check_dump(mp, head); |
| 314 | XFS_ERROR_REPORT("xlog_header_check_recover(1)", |
| 315 | XFS_ERRLEVEL_HIGH, mp); |
| 316 | return XFS_ERROR(EFSCORRUPTED); |
| 317 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 318 | xfs_warn(mp, |
| 319 | "dirty log entry has mismatched uuid - can't recover"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | xlog_header_check_dump(mp, head); |
| 321 | XFS_ERROR_REPORT("xlog_header_check_recover(2)", |
| 322 | XFS_ERRLEVEL_HIGH, mp); |
| 323 | return XFS_ERROR(EFSCORRUPTED); |
| 324 | } |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * read the head block of the log and check the header |
| 330 | */ |
| 331 | STATIC int |
| 332 | xlog_header_check_mount( |
| 333 | xfs_mount_t *mp, |
| 334 | xlog_rec_header_t *head) |
| 335 | { |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 336 | ASSERT(head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | if (uuid_is_nil(&head->h_fs_uuid)) { |
| 339 | /* |
| 340 | * IRIX doesn't write the h_fs_uuid or h_fmt fields. If |
| 341 | * h_fs_uuid is nil, we assume this log was last mounted |
| 342 | * by IRIX and continue. |
| 343 | */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 344 | xfs_warn(mp, "nil uuid in log - IRIX style log"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 346 | xfs_warn(mp, "log has mismatched uuid - can't recover"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | xlog_header_check_dump(mp, head); |
| 348 | XFS_ERROR_REPORT("xlog_header_check_mount", |
| 349 | XFS_ERRLEVEL_HIGH, mp); |
| 350 | return XFS_ERROR(EFSCORRUPTED); |
| 351 | } |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | STATIC void |
| 356 | xlog_recover_iodone( |
| 357 | struct xfs_buf *bp) |
| 358 | { |
Chandra Seetharaman | 5a52c2a58 | 2011-07-22 23:39:51 +0000 | [diff] [blame] | 359 | if (bp->b_error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | /* |
| 361 | * We're not going to bother about retrying |
| 362 | * this during recovery. One strike! |
| 363 | */ |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 364 | xfs_buf_ioerror_alert(bp, __func__); |
Dave Chinner | ebad861 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 365 | xfs_force_shutdown(bp->b_target->bt_mount, |
| 366 | SHUTDOWN_META_IO_ERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
Christoph Hellwig | cb669ca | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 368 | bp->b_iodone = NULL; |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 369 | xfs_buf_ioend(bp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | /* |
| 373 | * This routine finds (to an approximation) the first block in the physical |
| 374 | * log which contains the given cycle. It uses a binary search algorithm. |
| 375 | * Note that the algorithm can not be perfect because the disk will not |
| 376 | * necessarily be perfect. |
| 377 | */ |
David Chinner | a8272ce | 2007-11-23 16:28:09 +1100 | [diff] [blame] | 378 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | xlog_find_cycle_start( |
| 380 | xlog_t *log, |
| 381 | xfs_buf_t *bp, |
| 382 | xfs_daddr_t first_blk, |
| 383 | xfs_daddr_t *last_blk, |
| 384 | uint cycle) |
| 385 | { |
| 386 | xfs_caddr_t offset; |
| 387 | xfs_daddr_t mid_blk; |
Alex Elder | e3bb2e3 | 2010-04-15 18:17:30 +0000 | [diff] [blame] | 388 | xfs_daddr_t end_blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | uint mid_cycle; |
| 390 | int error; |
| 391 | |
Alex Elder | e3bb2e3 | 2010-04-15 18:17:30 +0000 | [diff] [blame] | 392 | end_blk = *last_blk; |
| 393 | mid_blk = BLK_AVG(first_blk, end_blk); |
| 394 | while (mid_blk != first_blk && mid_blk != end_blk) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 395 | error = xlog_bread(log, mid_blk, 1, bp, &offset); |
| 396 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return error; |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 398 | mid_cycle = xlog_get_cycle(offset); |
Alex Elder | e3bb2e3 | 2010-04-15 18:17:30 +0000 | [diff] [blame] | 399 | if (mid_cycle == cycle) |
| 400 | end_blk = mid_blk; /* last_half_cycle == mid_cycle */ |
| 401 | else |
| 402 | first_blk = mid_blk; /* first_half_cycle == mid_cycle */ |
| 403 | mid_blk = BLK_AVG(first_blk, end_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
Alex Elder | e3bb2e3 | 2010-04-15 18:17:30 +0000 | [diff] [blame] | 405 | ASSERT((mid_blk == first_blk && mid_blk+1 == end_blk) || |
| 406 | (mid_blk == end_blk && mid_blk-1 == first_blk)); |
| 407 | |
| 408 | *last_blk = end_blk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | /* |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 414 | * Check that a range of blocks does not contain stop_on_cycle_no. |
| 415 | * Fill in *new_blk with the block offset where such a block is |
| 416 | * found, or with -1 (an invalid block number) if there is no such |
| 417 | * block in the range. The scan needs to occur from front to back |
| 418 | * and the pointer into the region must be updated since a later |
| 419 | * routine will need to perform another test. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | */ |
| 421 | STATIC int |
| 422 | xlog_find_verify_cycle( |
| 423 | xlog_t *log, |
| 424 | xfs_daddr_t start_blk, |
| 425 | int nbblks, |
| 426 | uint stop_on_cycle_no, |
| 427 | xfs_daddr_t *new_blk) |
| 428 | { |
| 429 | xfs_daddr_t i, j; |
| 430 | uint cycle; |
| 431 | xfs_buf_t *bp; |
| 432 | xfs_daddr_t bufblks; |
| 433 | xfs_caddr_t buf = NULL; |
| 434 | int error = 0; |
| 435 | |
Alex Elder | 6881a22 | 2010-04-13 15:22:29 +1000 | [diff] [blame] | 436 | /* |
| 437 | * Greedily allocate a buffer big enough to handle the full |
| 438 | * range of basic blocks we'll be examining. If that fails, |
| 439 | * try a smaller size. We need to be able to read at least |
| 440 | * a log sector, or we're out of luck. |
| 441 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | bufblks = 1 << ffs(nbblks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | while (!(bp = xlog_get_bp(log, bufblks))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | bufblks >>= 1; |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 445 | if (bufblks < log->l_sectBBsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | return ENOMEM; |
| 447 | } |
| 448 | |
| 449 | for (i = start_blk; i < start_blk + nbblks; i += bufblks) { |
| 450 | int bcount; |
| 451 | |
| 452 | bcount = min(bufblks, (start_blk + nbblks - i)); |
| 453 | |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 454 | error = xlog_bread(log, i, bcount, bp, &buf); |
| 455 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | goto out; |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | for (j = 0; j < bcount; j++) { |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 459 | cycle = xlog_get_cycle(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | if (cycle == stop_on_cycle_no) { |
| 461 | *new_blk = i+j; |
| 462 | goto out; |
| 463 | } |
| 464 | |
| 465 | buf += BBSIZE; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | *new_blk = -1; |
| 470 | |
| 471 | out: |
| 472 | xlog_put_bp(bp); |
| 473 | return error; |
| 474 | } |
| 475 | |
| 476 | /* |
| 477 | * Potentially backup over partial log record write. |
| 478 | * |
| 479 | * In the typical case, last_blk is the number of the block directly after |
| 480 | * a good log record. Therefore, we subtract one to get the block number |
| 481 | * of the last block in the given buffer. extra_bblks contains the number |
| 482 | * of blocks we would have read on a previous read. This happens when the |
| 483 | * last log record is split over the end of the physical log. |
| 484 | * |
| 485 | * extra_bblks is the number of blocks potentially verified on a previous |
| 486 | * call to this routine. |
| 487 | */ |
| 488 | STATIC int |
| 489 | xlog_find_verify_log_record( |
| 490 | xlog_t *log, |
| 491 | xfs_daddr_t start_blk, |
| 492 | xfs_daddr_t *last_blk, |
| 493 | int extra_bblks) |
| 494 | { |
| 495 | xfs_daddr_t i; |
| 496 | xfs_buf_t *bp; |
| 497 | xfs_caddr_t offset = NULL; |
| 498 | xlog_rec_header_t *head = NULL; |
| 499 | int error = 0; |
| 500 | int smallmem = 0; |
| 501 | int num_blks = *last_blk - start_blk; |
| 502 | int xhdrs; |
| 503 | |
| 504 | ASSERT(start_blk != 0 || *last_blk != start_blk); |
| 505 | |
| 506 | if (!(bp = xlog_get_bp(log, num_blks))) { |
| 507 | if (!(bp = xlog_get_bp(log, 1))) |
| 508 | return ENOMEM; |
| 509 | smallmem = 1; |
| 510 | } else { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 511 | error = xlog_bread(log, start_blk, num_blks, bp, &offset); |
| 512 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | offset += ((num_blks - 1) << BBSHIFT); |
| 515 | } |
| 516 | |
| 517 | for (i = (*last_blk) - 1; i >= 0; i--) { |
| 518 | if (i < start_blk) { |
| 519 | /* valid log record not found */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 520 | xfs_warn(log->l_mp, |
| 521 | "Log inconsistent (didn't find previous header)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | ASSERT(0); |
| 523 | error = XFS_ERROR(EIO); |
| 524 | goto out; |
| 525 | } |
| 526 | |
| 527 | if (smallmem) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 528 | error = xlog_bread(log, i, 1, bp, &offset); |
| 529 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | head = (xlog_rec_header_t *)offset; |
| 534 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 535 | if (head->h_magicno == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | break; |
| 537 | |
| 538 | if (!smallmem) |
| 539 | offset -= BBSIZE; |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * We hit the beginning of the physical log & still no header. Return |
| 544 | * to caller. If caller can handle a return of -1, then this routine |
| 545 | * will be called again for the end of the physical log. |
| 546 | */ |
| 547 | if (i == -1) { |
| 548 | error = -1; |
| 549 | goto out; |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * We have the final block of the good log (the first block |
| 554 | * of the log record _before_ the head. So we check the uuid. |
| 555 | */ |
| 556 | if ((error = xlog_header_check_mount(log->l_mp, head))) |
| 557 | goto out; |
| 558 | |
| 559 | /* |
| 560 | * We may have found a log record header before we expected one. |
| 561 | * last_blk will be the 1st block # with a given cycle #. We may end |
| 562 | * up reading an entire log record. In this case, we don't want to |
| 563 | * reset last_blk. Only when last_blk points in the middle of a log |
| 564 | * record do we update last_blk. |
| 565 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 566 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 567 | uint h_size = be32_to_cpu(head->h_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE; |
| 570 | if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| 571 | xhdrs++; |
| 572 | } else { |
| 573 | xhdrs = 1; |
| 574 | } |
| 575 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 576 | if (*last_blk - i + extra_bblks != |
| 577 | BTOBB(be32_to_cpu(head->h_len)) + xhdrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | *last_blk = i; |
| 579 | |
| 580 | out: |
| 581 | xlog_put_bp(bp); |
| 582 | return error; |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * Head is defined to be the point of the log where the next log write |
| 587 | * write could go. This means that incomplete LR writes at the end are |
| 588 | * eliminated when calculating the head. We aren't guaranteed that previous |
| 589 | * LR have complete transactions. We only know that a cycle number of |
| 590 | * current cycle number -1 won't be present in the log if we start writing |
| 591 | * from our current block number. |
| 592 | * |
| 593 | * last_blk contains the block number of the first block with a given |
| 594 | * cycle number. |
| 595 | * |
| 596 | * Return: zero if normal, non-zero if error. |
| 597 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 598 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | xlog_find_head( |
| 600 | xlog_t *log, |
| 601 | xfs_daddr_t *return_head_blk) |
| 602 | { |
| 603 | xfs_buf_t *bp; |
| 604 | xfs_caddr_t offset; |
| 605 | xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk; |
| 606 | int num_scan_bblks; |
| 607 | uint first_half_cycle, last_half_cycle; |
| 608 | uint stop_on_cycle; |
| 609 | int error, log_bbnum = log->l_logBBsize; |
| 610 | |
| 611 | /* Is the end of the log device zeroed? */ |
| 612 | if ((error = xlog_find_zeroed(log, &first_blk)) == -1) { |
| 613 | *return_head_blk = first_blk; |
| 614 | |
| 615 | /* Is the whole lot zeroed? */ |
| 616 | if (!first_blk) { |
| 617 | /* Linux XFS shouldn't generate totally zeroed logs - |
| 618 | * mkfs etc write a dummy unmount record to a fresh |
| 619 | * log so we can store the uuid in there |
| 620 | */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 621 | xfs_warn(log->l_mp, "totally zeroed log"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | return 0; |
| 625 | } else if (error) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 626 | xfs_warn(log->l_mp, "empty log check failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return error; |
| 628 | } |
| 629 | |
| 630 | first_blk = 0; /* get cycle # of 1st block */ |
| 631 | bp = xlog_get_bp(log, 1); |
| 632 | if (!bp) |
| 633 | return ENOMEM; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 634 | |
| 635 | error = xlog_bread(log, 0, 1, bp, &offset); |
| 636 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | goto bp_err; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 638 | |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 639 | first_half_cycle = xlog_get_cycle(offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
| 641 | last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 642 | error = xlog_bread(log, last_blk, 1, bp, &offset); |
| 643 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | goto bp_err; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 645 | |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 646 | last_half_cycle = xlog_get_cycle(offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | ASSERT(last_half_cycle != 0); |
| 648 | |
| 649 | /* |
| 650 | * If the 1st half cycle number is equal to the last half cycle number, |
| 651 | * then the entire log is stamped with the same cycle number. In this |
| 652 | * case, head_blk can't be set to zero (which makes sense). The below |
| 653 | * math doesn't work out properly with head_blk equal to zero. Instead, |
| 654 | * we set it to log_bbnum which is an invalid block number, but this |
| 655 | * value makes the math correct. If head_blk doesn't changed through |
| 656 | * all the tests below, *head_blk is set to zero at the very end rather |
| 657 | * than log_bbnum. In a sense, log_bbnum and zero are the same block |
| 658 | * in a circular file. |
| 659 | */ |
| 660 | if (first_half_cycle == last_half_cycle) { |
| 661 | /* |
| 662 | * In this case we believe that the entire log should have |
| 663 | * cycle number last_half_cycle. We need to scan backwards |
| 664 | * from the end verifying that there are no holes still |
| 665 | * containing last_half_cycle - 1. If we find such a hole, |
| 666 | * then the start of that hole will be the new head. The |
| 667 | * simple case looks like |
| 668 | * x | x ... | x - 1 | x |
| 669 | * Another case that fits this picture would be |
| 670 | * x | x + 1 | x ... | x |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 671 | * In this case the head really is somewhere at the end of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | * log, as one of the latest writes at the beginning was |
| 673 | * incomplete. |
| 674 | * One more case is |
| 675 | * x | x + 1 | x ... | x - 1 | x |
| 676 | * This is really the combination of the above two cases, and |
| 677 | * the head has to end up at the start of the x-1 hole at the |
| 678 | * end of the log. |
| 679 | * |
| 680 | * In the 256k log case, we will read from the beginning to the |
| 681 | * end of the log and search for cycle numbers equal to x-1. |
| 682 | * We don't worry about the x+1 blocks that we encounter, |
| 683 | * because we know that they cannot be the head since the log |
| 684 | * started with x. |
| 685 | */ |
| 686 | head_blk = log_bbnum; |
| 687 | stop_on_cycle = last_half_cycle - 1; |
| 688 | } else { |
| 689 | /* |
| 690 | * In this case we want to find the first block with cycle |
| 691 | * number matching last_half_cycle. We expect the log to be |
| 692 | * some variation on |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 693 | * x + 1 ... | x ... | x |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | * The first block with cycle number x (last_half_cycle) will |
| 695 | * be where the new head belongs. First we do a binary search |
| 696 | * for the first occurrence of last_half_cycle. The binary |
| 697 | * search may not be totally accurate, so then we scan back |
| 698 | * from there looking for occurrences of last_half_cycle before |
| 699 | * us. If that backwards scan wraps around the beginning of |
| 700 | * the log, then we look for occurrences of last_half_cycle - 1 |
| 701 | * at the end of the log. The cases we're looking for look |
| 702 | * like |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 703 | * v binary search stopped here |
| 704 | * x + 1 ... | x | x + 1 | x ... | x |
| 705 | * ^ but we want to locate this spot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | * or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | * <---------> less than scan distance |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 708 | * x + 1 ... | x ... | x - 1 | x |
| 709 | * ^ we want to locate this spot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | */ |
| 711 | stop_on_cycle = last_half_cycle; |
| 712 | if ((error = xlog_find_cycle_start(log, bp, first_blk, |
| 713 | &head_blk, last_half_cycle))) |
| 714 | goto bp_err; |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * Now validate the answer. Scan back some number of maximum possible |
| 719 | * blocks and make sure each one has the expected cycle number. The |
| 720 | * maximum is determined by the total possible amount of buffering |
| 721 | * in the in-core log. The following number can be made tighter if |
| 722 | * we actually look at the block size of the filesystem. |
| 723 | */ |
| 724 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); |
| 725 | if (head_blk >= num_scan_bblks) { |
| 726 | /* |
| 727 | * We are guaranteed that the entire check can be performed |
| 728 | * in one buffer. |
| 729 | */ |
| 730 | start_blk = head_blk - num_scan_bblks; |
| 731 | if ((error = xlog_find_verify_cycle(log, |
| 732 | start_blk, num_scan_bblks, |
| 733 | stop_on_cycle, &new_blk))) |
| 734 | goto bp_err; |
| 735 | if (new_blk != -1) |
| 736 | head_blk = new_blk; |
| 737 | } else { /* need to read 2 parts of log */ |
| 738 | /* |
| 739 | * We are going to scan backwards in the log in two parts. |
| 740 | * First we scan the physical end of the log. In this part |
| 741 | * of the log, we are looking for blocks with cycle number |
| 742 | * last_half_cycle - 1. |
| 743 | * If we find one, then we know that the log starts there, as |
| 744 | * we've found a hole that didn't get written in going around |
| 745 | * the end of the physical log. The simple case for this is |
| 746 | * x + 1 ... | x ... | x - 1 | x |
| 747 | * <---------> less than scan distance |
| 748 | * If all of the blocks at the end of the log have cycle number |
| 749 | * last_half_cycle, then we check the blocks at the start of |
| 750 | * the log looking for occurrences of last_half_cycle. If we |
| 751 | * find one, then our current estimate for the location of the |
| 752 | * first occurrence of last_half_cycle is wrong and we move |
| 753 | * back to the hole we've found. This case looks like |
| 754 | * x + 1 ... | x | x + 1 | x ... |
| 755 | * ^ binary search stopped here |
| 756 | * Another case we need to handle that only occurs in 256k |
| 757 | * logs is |
| 758 | * x + 1 ... | x ... | x+1 | x ... |
| 759 | * ^ binary search stops here |
| 760 | * In a 256k log, the scan at the end of the log will see the |
| 761 | * x + 1 blocks. We need to skip past those since that is |
| 762 | * certainly not the head of the log. By searching for |
| 763 | * last_half_cycle-1 we accomplish that. |
| 764 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | ASSERT(head_blk <= INT_MAX && |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 766 | (xfs_daddr_t) num_scan_bblks >= head_blk); |
| 767 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if ((error = xlog_find_verify_cycle(log, start_blk, |
| 769 | num_scan_bblks - (int)head_blk, |
| 770 | (stop_on_cycle - 1), &new_blk))) |
| 771 | goto bp_err; |
| 772 | if (new_blk != -1) { |
| 773 | head_blk = new_blk; |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 774 | goto validate_head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Scan beginning of log now. The last part of the physical |
| 779 | * log is good. This scan needs to verify that it doesn't find |
| 780 | * the last_half_cycle. |
| 781 | */ |
| 782 | start_blk = 0; |
| 783 | ASSERT(head_blk <= INT_MAX); |
| 784 | if ((error = xlog_find_verify_cycle(log, |
| 785 | start_blk, (int)head_blk, |
| 786 | stop_on_cycle, &new_blk))) |
| 787 | goto bp_err; |
| 788 | if (new_blk != -1) |
| 789 | head_blk = new_blk; |
| 790 | } |
| 791 | |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 792 | validate_head: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | /* |
| 794 | * Now we need to make sure head_blk is not pointing to a block in |
| 795 | * the middle of a log record. |
| 796 | */ |
| 797 | num_scan_bblks = XLOG_REC_SHIFT(log); |
| 798 | if (head_blk >= num_scan_bblks) { |
| 799 | start_blk = head_blk - num_scan_bblks; /* don't read head_blk */ |
| 800 | |
| 801 | /* start ptr at last block ptr before head_blk */ |
| 802 | if ((error = xlog_find_verify_log_record(log, start_blk, |
| 803 | &head_blk, 0)) == -1) { |
| 804 | error = XFS_ERROR(EIO); |
| 805 | goto bp_err; |
| 806 | } else if (error) |
| 807 | goto bp_err; |
| 808 | } else { |
| 809 | start_blk = 0; |
| 810 | ASSERT(head_blk <= INT_MAX); |
| 811 | if ((error = xlog_find_verify_log_record(log, start_blk, |
| 812 | &head_blk, 0)) == -1) { |
| 813 | /* We hit the beginning of the log during our search */ |
Alex Elder | 3f943d8 | 2010-04-15 18:17:34 +0000 | [diff] [blame] | 814 | start_blk = log_bbnum - (num_scan_bblks - head_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | new_blk = log_bbnum; |
| 816 | ASSERT(start_blk <= INT_MAX && |
| 817 | (xfs_daddr_t) log_bbnum-start_blk >= 0); |
| 818 | ASSERT(head_blk <= INT_MAX); |
| 819 | if ((error = xlog_find_verify_log_record(log, |
| 820 | start_blk, &new_blk, |
| 821 | (int)head_blk)) == -1) { |
| 822 | error = XFS_ERROR(EIO); |
| 823 | goto bp_err; |
| 824 | } else if (error) |
| 825 | goto bp_err; |
| 826 | if (new_blk != log_bbnum) |
| 827 | head_blk = new_blk; |
| 828 | } else if (error) |
| 829 | goto bp_err; |
| 830 | } |
| 831 | |
| 832 | xlog_put_bp(bp); |
| 833 | if (head_blk == log_bbnum) |
| 834 | *return_head_blk = 0; |
| 835 | else |
| 836 | *return_head_blk = head_blk; |
| 837 | /* |
| 838 | * When returning here, we have a good block number. Bad block |
| 839 | * means that during a previous crash, we didn't have a clean break |
| 840 | * from cycle number N to cycle number N-1. In this case, we need |
| 841 | * to find the first block with cycle number N-1. |
| 842 | */ |
| 843 | return 0; |
| 844 | |
| 845 | bp_err: |
| 846 | xlog_put_bp(bp); |
| 847 | |
| 848 | if (error) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 849 | xfs_warn(log->l_mp, "failed to find log head"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | return error; |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * Find the sync block number or the tail of the log. |
| 855 | * |
| 856 | * This will be the block number of the last record to have its |
| 857 | * associated buffers synced to disk. Every log record header has |
| 858 | * a sync lsn embedded in it. LSNs hold block numbers, so it is easy |
| 859 | * to get a sync block number. The only concern is to figure out which |
| 860 | * log record header to believe. |
| 861 | * |
| 862 | * The following algorithm uses the log record header with the largest |
| 863 | * lsn. The entire log record does not need to be valid. We only care |
| 864 | * that the header is valid. |
| 865 | * |
| 866 | * We could speed up search by using current head_blk buffer, but it is not |
| 867 | * available. |
| 868 | */ |
Eric Sandeen | 5d77c0d | 2009-11-19 15:52:00 +0000 | [diff] [blame] | 869 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | xlog_find_tail( |
| 871 | xlog_t *log, |
| 872 | xfs_daddr_t *head_blk, |
Eric Sandeen | 65be605 | 2006-01-11 15:34:19 +1100 | [diff] [blame] | 873 | xfs_daddr_t *tail_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | { |
| 875 | xlog_rec_header_t *rhead; |
| 876 | xlog_op_header_t *op_head; |
| 877 | xfs_caddr_t offset = NULL; |
| 878 | xfs_buf_t *bp; |
| 879 | int error, i, found; |
| 880 | xfs_daddr_t umount_data_blk; |
| 881 | xfs_daddr_t after_umount_blk; |
| 882 | xfs_lsn_t tail_lsn; |
| 883 | int hblks; |
| 884 | |
| 885 | found = 0; |
| 886 | |
| 887 | /* |
| 888 | * Find previous log record |
| 889 | */ |
| 890 | if ((error = xlog_find_head(log, head_blk))) |
| 891 | return error; |
| 892 | |
| 893 | bp = xlog_get_bp(log, 1); |
| 894 | if (!bp) |
| 895 | return ENOMEM; |
| 896 | if (*head_blk == 0) { /* special case */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 897 | error = xlog_bread(log, 0, 1, bp, &offset); |
| 898 | if (error) |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 899 | goto done; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 900 | |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 901 | if (xlog_get_cycle(offset) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | *tail_blk = 0; |
| 903 | /* leave all other log inited values alone */ |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 904 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | } |
| 907 | |
| 908 | /* |
| 909 | * Search backwards looking for log record header block |
| 910 | */ |
| 911 | ASSERT(*head_blk < INT_MAX); |
| 912 | for (i = (int)(*head_blk) - 1; i >= 0; i--) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 913 | error = xlog_bread(log, i, 1, bp, &offset); |
| 914 | if (error) |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 915 | goto done; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 916 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 917 | if (*(__be32 *)offset == cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | found = 1; |
| 919 | break; |
| 920 | } |
| 921 | } |
| 922 | /* |
| 923 | * If we haven't found the log record header block, start looking |
| 924 | * again from the end of the physical log. XXXmiken: There should be |
| 925 | * a check here to make sure we didn't search more than N blocks in |
| 926 | * the previous code. |
| 927 | */ |
| 928 | if (!found) { |
| 929 | for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 930 | error = xlog_bread(log, i, 1, bp, &offset); |
| 931 | if (error) |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 932 | goto done; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 933 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 934 | if (*(__be32 *)offset == |
| 935 | cpu_to_be32(XLOG_HEADER_MAGIC_NUM)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | found = 2; |
| 937 | break; |
| 938 | } |
| 939 | } |
| 940 | } |
| 941 | if (!found) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 942 | xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | ASSERT(0); |
| 944 | return XFS_ERROR(EIO); |
| 945 | } |
| 946 | |
| 947 | /* find blk_no of tail of log */ |
| 948 | rhead = (xlog_rec_header_t *)offset; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 949 | *tail_blk = BLOCK_LSN(be64_to_cpu(rhead->h_tail_lsn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
| 951 | /* |
| 952 | * Reset log values according to the state of the log when we |
| 953 | * crashed. In the case where head_blk == 0, we bump curr_cycle |
| 954 | * one because the next write starts a new cycle rather than |
| 955 | * continuing the cycle of the last good log record. At this |
| 956 | * point we have guaranteed that all partial log records have been |
| 957 | * accounted for. Therefore, we know that the last good log record |
| 958 | * written was complete and ended exactly on the end boundary |
| 959 | * of the physical log. |
| 960 | */ |
| 961 | log->l_prev_block = i; |
| 962 | log->l_curr_block = (int)*head_blk; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 963 | log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | if (found == 2) |
| 965 | log->l_curr_cycle++; |
Dave Chinner | 1c3cb9e | 2010-12-21 12:28:39 +1100 | [diff] [blame] | 966 | atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); |
Dave Chinner | 84f3c68 | 2010-12-03 22:11:29 +1100 | [diff] [blame] | 967 | atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); |
Dave Chinner | a69ed03 | 2010-12-21 12:08:20 +1100 | [diff] [blame] | 968 | xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, |
| 969 | BBTOB(log->l_curr_block)); |
| 970 | xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, |
| 971 | BBTOB(log->l_curr_block)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | /* |
| 974 | * Look for unmount record. If we find it, then we know there |
| 975 | * was a clean unmount. Since 'i' could be the last block in |
| 976 | * the physical log, we convert to a log block before comparing |
| 977 | * to the head_blk. |
| 978 | * |
| 979 | * Save the current tail lsn to use to pass to |
| 980 | * xlog_clear_stale_blocks() below. We won't want to clear the |
| 981 | * unmount record if there is one, so we pass the lsn of the |
| 982 | * unmount record rather than the block after it. |
| 983 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 984 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 985 | int h_size = be32_to_cpu(rhead->h_size); |
| 986 | int h_version = be32_to_cpu(rhead->h_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
| 988 | if ((h_version & XLOG_VERSION_2) && |
| 989 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
| 990 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; |
| 991 | if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| 992 | hblks++; |
| 993 | } else { |
| 994 | hblks = 1; |
| 995 | } |
| 996 | } else { |
| 997 | hblks = 1; |
| 998 | } |
| 999 | after_umount_blk = (i + hblks + (int) |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 1000 | BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; |
Dave Chinner | 1c3cb9e | 2010-12-21 12:28:39 +1100 | [diff] [blame] | 1001 | tail_lsn = atomic64_read(&log->l_tail_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | if (*head_blk == after_umount_blk && |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 1003 | be32_to_cpu(rhead->h_num_logops) == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | umount_data_blk = (i + hblks) % log->l_logBBsize; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1005 | error = xlog_bread(log, umount_data_blk, 1, bp, &offset); |
| 1006 | if (error) |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 1007 | goto done; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | op_head = (xlog_op_header_t *)offset; |
| 1010 | if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) { |
| 1011 | /* |
| 1012 | * Set tail and last sync so that newly written |
| 1013 | * log records will point recovery to after the |
| 1014 | * current unmount record. |
| 1015 | */ |
Dave Chinner | 1c3cb9e | 2010-12-21 12:28:39 +1100 | [diff] [blame] | 1016 | xlog_assign_atomic_lsn(&log->l_tail_lsn, |
| 1017 | log->l_curr_cycle, after_umount_blk); |
| 1018 | xlog_assign_atomic_lsn(&log->l_last_sync_lsn, |
| 1019 | log->l_curr_cycle, after_umount_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | *tail_blk = after_umount_blk; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1021 | |
| 1022 | /* |
| 1023 | * Note that the unmount was clean. If the unmount |
| 1024 | * was not clean, we need to know this to rebuild the |
| 1025 | * superblock counters from the perag headers if we |
| 1026 | * have a filesystem using non-persistent counters. |
| 1027 | */ |
| 1028 | log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | /* |
| 1033 | * Make sure that there are no blocks in front of the head |
| 1034 | * with the same cycle number as the head. This can happen |
| 1035 | * because we allow multiple outstanding log writes concurrently, |
| 1036 | * and the later writes might make it out before earlier ones. |
| 1037 | * |
| 1038 | * We use the lsn from before modifying it so that we'll never |
| 1039 | * overwrite the unmount record after a clean unmount. |
| 1040 | * |
| 1041 | * Do this only if we are going to recover the filesystem |
| 1042 | * |
| 1043 | * NOTE: This used to say "if (!readonly)" |
| 1044 | * However on Linux, we can & do recover a read-only filesystem. |
| 1045 | * We only skip recovery if NORECOVERY is specified on mount, |
| 1046 | * in which case we would not be here. |
| 1047 | * |
| 1048 | * But... if the -device- itself is readonly, just skip this. |
| 1049 | * We can't recover this device anyway, so it won't matter. |
| 1050 | */ |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 1051 | if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | error = xlog_clear_stale_blocks(log, tail_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
Alex Elder | 9db127e | 2010-04-15 18:17:26 +0000 | [diff] [blame] | 1054 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | xlog_put_bp(bp); |
| 1056 | |
| 1057 | if (error) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1058 | xfs_warn(log->l_mp, "failed to locate log tail"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | return error; |
| 1060 | } |
| 1061 | |
| 1062 | /* |
| 1063 | * Is the log zeroed at all? |
| 1064 | * |
| 1065 | * The last binary search should be changed to perform an X block read |
| 1066 | * once X becomes small enough. You can then search linearly through |
| 1067 | * the X blocks. This will cut down on the number of reads we need to do. |
| 1068 | * |
| 1069 | * If the log is partially zeroed, this routine will pass back the blkno |
| 1070 | * of the first block with cycle number 0. It won't have a complete LR |
| 1071 | * preceding it. |
| 1072 | * |
| 1073 | * Return: |
| 1074 | * 0 => the log is completely written to |
| 1075 | * -1 => use *blk_no as the first block of the log |
| 1076 | * >0 => error has occurred |
| 1077 | */ |
David Chinner | a8272ce | 2007-11-23 16:28:09 +1100 | [diff] [blame] | 1078 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | xlog_find_zeroed( |
| 1080 | xlog_t *log, |
| 1081 | xfs_daddr_t *blk_no) |
| 1082 | { |
| 1083 | xfs_buf_t *bp; |
| 1084 | xfs_caddr_t offset; |
| 1085 | uint first_cycle, last_cycle; |
| 1086 | xfs_daddr_t new_blk, last_blk, start_blk; |
| 1087 | xfs_daddr_t num_scan_bblks; |
| 1088 | int error, log_bbnum = log->l_logBBsize; |
| 1089 | |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 1090 | *blk_no = 0; |
| 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | /* check totally zeroed log */ |
| 1093 | bp = xlog_get_bp(log, 1); |
| 1094 | if (!bp) |
| 1095 | return ENOMEM; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1096 | error = xlog_bread(log, 0, 1, bp, &offset); |
| 1097 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | goto bp_err; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1099 | |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 1100 | first_cycle = xlog_get_cycle(offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | if (first_cycle == 0) { /* completely zeroed log */ |
| 1102 | *blk_no = 0; |
| 1103 | xlog_put_bp(bp); |
| 1104 | return -1; |
| 1105 | } |
| 1106 | |
| 1107 | /* check partially zeroed log */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1108 | error = xlog_bread(log, log_bbnum-1, 1, bp, &offset); |
| 1109 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | goto bp_err; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1111 | |
Christoph Hellwig | 03bea6f | 2007-10-12 10:58:05 +1000 | [diff] [blame] | 1112 | last_cycle = xlog_get_cycle(offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | if (last_cycle != 0) { /* log completely written to */ |
| 1114 | xlog_put_bp(bp); |
| 1115 | return 0; |
| 1116 | } else if (first_cycle != 1) { |
| 1117 | /* |
| 1118 | * If the cycle of the last block is zero, the cycle of |
| 1119 | * the first block must be 1. If it's not, maybe we're |
| 1120 | * not looking at a log... Bail out. |
| 1121 | */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1122 | xfs_warn(log->l_mp, |
| 1123 | "Log inconsistent or not a log (last==0, first!=1)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | return XFS_ERROR(EINVAL); |
| 1125 | } |
| 1126 | |
| 1127 | /* we have a partially zeroed log */ |
| 1128 | last_blk = log_bbnum-1; |
| 1129 | if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0))) |
| 1130 | goto bp_err; |
| 1131 | |
| 1132 | /* |
| 1133 | * Validate the answer. Because there is no way to guarantee that |
| 1134 | * the entire log is made up of log records which are the same size, |
| 1135 | * we scan over the defined maximum blocks. At this point, the maximum |
| 1136 | * is not chosen to mean anything special. XXXmiken |
| 1137 | */ |
| 1138 | num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log); |
| 1139 | ASSERT(num_scan_bblks <= INT_MAX); |
| 1140 | |
| 1141 | if (last_blk < num_scan_bblks) |
| 1142 | num_scan_bblks = last_blk; |
| 1143 | start_blk = last_blk - num_scan_bblks; |
| 1144 | |
| 1145 | /* |
| 1146 | * We search for any instances of cycle number 0 that occur before |
| 1147 | * our current estimate of the head. What we're trying to detect is |
| 1148 | * 1 ... | 0 | 1 | 0... |
| 1149 | * ^ binary search ends here |
| 1150 | */ |
| 1151 | if ((error = xlog_find_verify_cycle(log, start_blk, |
| 1152 | (int)num_scan_bblks, 0, &new_blk))) |
| 1153 | goto bp_err; |
| 1154 | if (new_blk != -1) |
| 1155 | last_blk = new_blk; |
| 1156 | |
| 1157 | /* |
| 1158 | * Potentially backup over partial log record write. We don't need |
| 1159 | * to search the end of the log because we know it is zero. |
| 1160 | */ |
| 1161 | if ((error = xlog_find_verify_log_record(log, start_blk, |
| 1162 | &last_blk, 0)) == -1) { |
| 1163 | error = XFS_ERROR(EIO); |
| 1164 | goto bp_err; |
| 1165 | } else if (error) |
| 1166 | goto bp_err; |
| 1167 | |
| 1168 | *blk_no = last_blk; |
| 1169 | bp_err: |
| 1170 | xlog_put_bp(bp); |
| 1171 | if (error) |
| 1172 | return error; |
| 1173 | return -1; |
| 1174 | } |
| 1175 | |
| 1176 | /* |
| 1177 | * These are simple subroutines used by xlog_clear_stale_blocks() below |
| 1178 | * to initialize a buffer full of empty log record headers and write |
| 1179 | * them into the log. |
| 1180 | */ |
| 1181 | STATIC void |
| 1182 | xlog_add_record( |
| 1183 | xlog_t *log, |
| 1184 | xfs_caddr_t buf, |
| 1185 | int cycle, |
| 1186 | int block, |
| 1187 | int tail_cycle, |
| 1188 | int tail_block) |
| 1189 | { |
| 1190 | xlog_rec_header_t *recp = (xlog_rec_header_t *)buf; |
| 1191 | |
| 1192 | memset(buf, 0, BBSIZE); |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 1193 | recp->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); |
| 1194 | recp->h_cycle = cpu_to_be32(cycle); |
| 1195 | recp->h_version = cpu_to_be32( |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 1196 | xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? 2 : 1); |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 1197 | recp->h_lsn = cpu_to_be64(xlog_assign_lsn(cycle, block)); |
| 1198 | recp->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(tail_cycle, tail_block)); |
| 1199 | recp->h_fmt = cpu_to_be32(XLOG_FMT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t)); |
| 1201 | } |
| 1202 | |
| 1203 | STATIC int |
| 1204 | xlog_write_log_records( |
| 1205 | xlog_t *log, |
| 1206 | int cycle, |
| 1207 | int start_block, |
| 1208 | int blocks, |
| 1209 | int tail_cycle, |
| 1210 | int tail_block) |
| 1211 | { |
| 1212 | xfs_caddr_t offset; |
| 1213 | xfs_buf_t *bp; |
| 1214 | int balign, ealign; |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 1215 | int sectbb = log->l_sectBBsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | int end_block = start_block + blocks; |
| 1217 | int bufblks; |
| 1218 | int error = 0; |
| 1219 | int i, j = 0; |
| 1220 | |
Alex Elder | 6881a22 | 2010-04-13 15:22:29 +1000 | [diff] [blame] | 1221 | /* |
| 1222 | * Greedily allocate a buffer big enough to handle the full |
| 1223 | * range of basic blocks to be written. If that fails, try |
| 1224 | * a smaller size. We need to be able to write at least a |
| 1225 | * log sector, or we're out of luck. |
| 1226 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | bufblks = 1 << ffs(blocks); |
| 1228 | while (!(bp = xlog_get_bp(log, bufblks))) { |
| 1229 | bufblks >>= 1; |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 1230 | if (bufblks < sectbb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | return ENOMEM; |
| 1232 | } |
| 1233 | |
| 1234 | /* We may need to do a read at the start to fill in part of |
| 1235 | * the buffer in the starting sector not covered by the first |
| 1236 | * write below. |
| 1237 | */ |
Alex Elder | 5c17f53 | 2010-04-13 15:22:48 +1000 | [diff] [blame] | 1238 | balign = round_down(start_block, sectbb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | if (balign != start_block) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1240 | error = xlog_bread_noalign(log, start_block, 1, bp); |
| 1241 | if (error) |
| 1242 | goto out_put_bp; |
| 1243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | j = start_block - balign; |
| 1245 | } |
| 1246 | |
| 1247 | for (i = start_block; i < end_block; i += bufblks) { |
| 1248 | int bcount, endcount; |
| 1249 | |
| 1250 | bcount = min(bufblks, end_block - start_block); |
| 1251 | endcount = bcount - j; |
| 1252 | |
| 1253 | /* We may need to do a read at the end to fill in part of |
| 1254 | * the buffer in the final sector not covered by the write. |
| 1255 | * If this is the same sector as the above read, skip it. |
| 1256 | */ |
Alex Elder | 5c17f53 | 2010-04-13 15:22:48 +1000 | [diff] [blame] | 1257 | ealign = round_down(end_block, sectbb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | if (j == 0 && (start_block + endcount > ealign)) { |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 1259 | offset = bp->b_addr + BBTOB(ealign - start_block); |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 1260 | error = xlog_bread_offset(log, ealign, sectbb, |
| 1261 | bp, offset); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1262 | if (error) |
| 1263 | break; |
| 1264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
| 1266 | |
| 1267 | offset = xlog_align(log, start_block, endcount, bp); |
| 1268 | for (; j < endcount; j++) { |
| 1269 | xlog_add_record(log, offset, cycle, i+j, |
| 1270 | tail_cycle, tail_block); |
| 1271 | offset += BBSIZE; |
| 1272 | } |
| 1273 | error = xlog_bwrite(log, start_block, endcount, bp); |
| 1274 | if (error) |
| 1275 | break; |
| 1276 | start_block += endcount; |
| 1277 | j = 0; |
| 1278 | } |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 1279 | |
| 1280 | out_put_bp: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | xlog_put_bp(bp); |
| 1282 | return error; |
| 1283 | } |
| 1284 | |
| 1285 | /* |
| 1286 | * This routine is called to blow away any incomplete log writes out |
| 1287 | * in front of the log head. We do this so that we won't become confused |
| 1288 | * if we come up, write only a little bit more, and then crash again. |
| 1289 | * If we leave the partial log records out there, this situation could |
| 1290 | * cause us to think those partial writes are valid blocks since they |
| 1291 | * have the current cycle number. We get rid of them by overwriting them |
| 1292 | * with empty log records with the old cycle number rather than the |
| 1293 | * current one. |
| 1294 | * |
| 1295 | * The tail lsn is passed in rather than taken from |
| 1296 | * the log so that we will not write over the unmount record after a |
| 1297 | * clean unmount in a 512 block log. Doing so would leave the log without |
| 1298 | * any valid log records in it until a new one was written. If we crashed |
| 1299 | * during that time we would not be able to recover. |
| 1300 | */ |
| 1301 | STATIC int |
| 1302 | xlog_clear_stale_blocks( |
| 1303 | xlog_t *log, |
| 1304 | xfs_lsn_t tail_lsn) |
| 1305 | { |
| 1306 | int tail_cycle, head_cycle; |
| 1307 | int tail_block, head_block; |
| 1308 | int tail_distance, max_distance; |
| 1309 | int distance; |
| 1310 | int error; |
| 1311 | |
| 1312 | tail_cycle = CYCLE_LSN(tail_lsn); |
| 1313 | tail_block = BLOCK_LSN(tail_lsn); |
| 1314 | head_cycle = log->l_curr_cycle; |
| 1315 | head_block = log->l_curr_block; |
| 1316 | |
| 1317 | /* |
| 1318 | * Figure out the distance between the new head of the log |
| 1319 | * and the tail. We want to write over any blocks beyond the |
| 1320 | * head that we may have written just before the crash, but |
| 1321 | * we don't want to overwrite the tail of the log. |
| 1322 | */ |
| 1323 | if (head_cycle == tail_cycle) { |
| 1324 | /* |
| 1325 | * The tail is behind the head in the physical log, |
| 1326 | * so the distance from the head to the tail is the |
| 1327 | * distance from the head to the end of the log plus |
| 1328 | * the distance from the beginning of the log to the |
| 1329 | * tail. |
| 1330 | */ |
| 1331 | if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) { |
| 1332 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)", |
| 1333 | XFS_ERRLEVEL_LOW, log->l_mp); |
| 1334 | return XFS_ERROR(EFSCORRUPTED); |
| 1335 | } |
| 1336 | tail_distance = tail_block + (log->l_logBBsize - head_block); |
| 1337 | } else { |
| 1338 | /* |
| 1339 | * The head is behind the tail in the physical log, |
| 1340 | * so the distance from the head to the tail is just |
| 1341 | * the tail block minus the head block. |
| 1342 | */ |
| 1343 | if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){ |
| 1344 | XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)", |
| 1345 | XFS_ERRLEVEL_LOW, log->l_mp); |
| 1346 | return XFS_ERROR(EFSCORRUPTED); |
| 1347 | } |
| 1348 | tail_distance = tail_block - head_block; |
| 1349 | } |
| 1350 | |
| 1351 | /* |
| 1352 | * If the head is right up against the tail, we can't clear |
| 1353 | * anything. |
| 1354 | */ |
| 1355 | if (tail_distance <= 0) { |
| 1356 | ASSERT(tail_distance == 0); |
| 1357 | return 0; |
| 1358 | } |
| 1359 | |
| 1360 | max_distance = XLOG_TOTAL_REC_SHIFT(log); |
| 1361 | /* |
| 1362 | * Take the smaller of the maximum amount of outstanding I/O |
| 1363 | * we could have and the distance to the tail to clear out. |
| 1364 | * We take the smaller so that we don't overwrite the tail and |
| 1365 | * we don't waste all day writing from the head to the tail |
| 1366 | * for no reason. |
| 1367 | */ |
| 1368 | max_distance = MIN(max_distance, tail_distance); |
| 1369 | |
| 1370 | if ((head_block + max_distance) <= log->l_logBBsize) { |
| 1371 | /* |
| 1372 | * We can stomp all the blocks we need to without |
| 1373 | * wrapping around the end of the log. Just do it |
| 1374 | * in a single write. Use the cycle number of the |
| 1375 | * current cycle minus one so that the log will look like: |
| 1376 | * n ... | n - 1 ... |
| 1377 | */ |
| 1378 | error = xlog_write_log_records(log, (head_cycle - 1), |
| 1379 | head_block, max_distance, tail_cycle, |
| 1380 | tail_block); |
| 1381 | if (error) |
| 1382 | return error; |
| 1383 | } else { |
| 1384 | /* |
| 1385 | * We need to wrap around the end of the physical log in |
| 1386 | * order to clear all the blocks. Do it in two separate |
| 1387 | * I/Os. The first write should be from the head to the |
| 1388 | * end of the physical log, and it should use the current |
| 1389 | * cycle number minus one just like above. |
| 1390 | */ |
| 1391 | distance = log->l_logBBsize - head_block; |
| 1392 | error = xlog_write_log_records(log, (head_cycle - 1), |
| 1393 | head_block, distance, tail_cycle, |
| 1394 | tail_block); |
| 1395 | |
| 1396 | if (error) |
| 1397 | return error; |
| 1398 | |
| 1399 | /* |
| 1400 | * Now write the blocks at the start of the physical log. |
| 1401 | * This writes the remainder of the blocks we want to clear. |
| 1402 | * It uses the current cycle number since we're now on the |
| 1403 | * same cycle as the head so that we get: |
| 1404 | * n ... n ... | n - 1 ... |
| 1405 | * ^^^^^ blocks we're writing |
| 1406 | */ |
| 1407 | distance = max_distance - (log->l_logBBsize - head_block); |
| 1408 | error = xlog_write_log_records(log, head_cycle, 0, distance, |
| 1409 | tail_cycle, tail_block); |
| 1410 | if (error) |
| 1411 | return error; |
| 1412 | } |
| 1413 | |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | /****************************************************************************** |
| 1418 | * |
| 1419 | * Log recover routines |
| 1420 | * |
| 1421 | ****************************************************************************** |
| 1422 | */ |
| 1423 | |
| 1424 | STATIC xlog_recover_t * |
| 1425 | xlog_recover_find_tid( |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1426 | struct hlist_head *head, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | xlog_tid_t tid) |
| 1428 | { |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1429 | xlog_recover_t *trans; |
| 1430 | struct hlist_node *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1432 | hlist_for_each_entry(trans, n, head, r_list) { |
| 1433 | if (trans->r_log_tid == tid) |
| 1434 | return trans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | } |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1436 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | STATIC void |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1440 | xlog_recover_new_tid( |
| 1441 | struct hlist_head *head, |
| 1442 | xlog_tid_t tid, |
| 1443 | xfs_lsn_t lsn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | { |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1445 | xlog_recover_t *trans; |
| 1446 | |
| 1447 | trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP); |
| 1448 | trans->r_log_tid = tid; |
| 1449 | trans->r_lsn = lsn; |
| 1450 | INIT_LIST_HEAD(&trans->r_itemq); |
| 1451 | |
| 1452 | INIT_HLIST_NODE(&trans->r_list); |
| 1453 | hlist_add_head(&trans->r_list, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | } |
| 1455 | |
| 1456 | STATIC void |
| 1457 | xlog_recover_add_item( |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1458 | struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | { |
| 1460 | xlog_recover_item_t *item; |
| 1461 | |
| 1462 | item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP); |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1463 | INIT_LIST_HEAD(&item->ri_list); |
| 1464 | list_add_tail(&item->ri_list, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | } |
| 1466 | |
| 1467 | STATIC int |
| 1468 | xlog_recover_add_to_cont_trans( |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1469 | struct log *log, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | xlog_recover_t *trans, |
| 1471 | xfs_caddr_t dp, |
| 1472 | int len) |
| 1473 | { |
| 1474 | xlog_recover_item_t *item; |
| 1475 | xfs_caddr_t ptr, old_ptr; |
| 1476 | int old_len; |
| 1477 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1478 | if (list_empty(&trans->r_itemq)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | /* finish copying rest of trans header */ |
| 1480 | xlog_recover_add_item(&trans->r_itemq); |
| 1481 | ptr = (xfs_caddr_t) &trans->r_theader + |
| 1482 | sizeof(xfs_trans_header_t) - len; |
| 1483 | memcpy(ptr, dp, len); /* d, s, l */ |
| 1484 | return 0; |
| 1485 | } |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1486 | /* take the tail entry */ |
| 1487 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
| 1489 | old_ptr = item->ri_buf[item->ri_cnt-1].i_addr; |
| 1490 | old_len = item->ri_buf[item->ri_cnt-1].i_len; |
| 1491 | |
Mitsuo Hayasaka | 4505360 | 2012-01-27 06:37:26 +0000 | [diff] [blame] | 1492 | ptr = kmem_realloc(old_ptr, len+old_len, old_len, KM_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | memcpy(&ptr[old_len], dp, len); /* d, s, l */ |
| 1494 | item->ri_buf[item->ri_cnt-1].i_len += len; |
| 1495 | item->ri_buf[item->ri_cnt-1].i_addr = ptr; |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1496 | trace_xfs_log_recover_item_add_cont(log, trans, item, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | return 0; |
| 1498 | } |
| 1499 | |
| 1500 | /* |
| 1501 | * The next region to add is the start of a new region. It could be |
| 1502 | * a whole region or it could be the first part of a new region. Because |
| 1503 | * of this, the assumption here is that the type and size fields of all |
| 1504 | * format structures fit into the first 32 bits of the structure. |
| 1505 | * |
| 1506 | * This works because all regions must be 32 bit aligned. Therefore, we |
| 1507 | * either have both fields or we have neither field. In the case we have |
| 1508 | * neither field, the data part of the region is zero length. We only have |
| 1509 | * a log_op_header and can throw away the header since a new one will appear |
| 1510 | * later. If we have at least 4 bytes, then we can determine how many regions |
| 1511 | * will appear in the current log item. |
| 1512 | */ |
| 1513 | STATIC int |
| 1514 | xlog_recover_add_to_trans( |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1515 | struct log *log, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | xlog_recover_t *trans, |
| 1517 | xfs_caddr_t dp, |
| 1518 | int len) |
| 1519 | { |
| 1520 | xfs_inode_log_format_t *in_f; /* any will do */ |
| 1521 | xlog_recover_item_t *item; |
| 1522 | xfs_caddr_t ptr; |
| 1523 | |
| 1524 | if (!len) |
| 1525 | return 0; |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1526 | if (list_empty(&trans->r_itemq)) { |
David Chinner | 5a792c4 | 2008-10-30 17:40:09 +1100 | [diff] [blame] | 1527 | /* we need to catch log corruptions here */ |
| 1528 | if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1529 | xfs_warn(log->l_mp, "%s: bad header magic number", |
| 1530 | __func__); |
David Chinner | 5a792c4 | 2008-10-30 17:40:09 +1100 | [diff] [blame] | 1531 | ASSERT(0); |
| 1532 | return XFS_ERROR(EIO); |
| 1533 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | if (len == sizeof(xfs_trans_header_t)) |
| 1535 | xlog_recover_add_item(&trans->r_itemq); |
| 1536 | memcpy(&trans->r_theader, dp, len); /* d, s, l */ |
| 1537 | return 0; |
| 1538 | } |
| 1539 | |
| 1540 | ptr = kmem_alloc(len, KM_SLEEP); |
| 1541 | memcpy(ptr, dp, len); |
| 1542 | in_f = (xfs_inode_log_format_t *)ptr; |
| 1543 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1544 | /* take the tail entry */ |
| 1545 | item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list); |
| 1546 | if (item->ri_total != 0 && |
| 1547 | item->ri_total == item->ri_cnt) { |
| 1548 | /* tail item is in use, get a new one */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | xlog_recover_add_item(&trans->r_itemq); |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1550 | item = list_entry(trans->r_itemq.prev, |
| 1551 | xlog_recover_item_t, ri_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | |
| 1554 | if (item->ri_total == 0) { /* first region to be added */ |
Christoph Hellwig | e8fa6b4 | 2009-03-03 14:48:36 -0500 | [diff] [blame] | 1555 | if (in_f->ilf_size == 0 || |
| 1556 | in_f->ilf_size > XLOG_MAX_REGIONS_IN_ITEM) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1557 | xfs_warn(log->l_mp, |
| 1558 | "bad number of regions (%d) in inode log format", |
Christoph Hellwig | e8fa6b4 | 2009-03-03 14:48:36 -0500 | [diff] [blame] | 1559 | in_f->ilf_size); |
| 1560 | ASSERT(0); |
| 1561 | return XFS_ERROR(EIO); |
| 1562 | } |
| 1563 | |
| 1564 | item->ri_total = in_f->ilf_size; |
| 1565 | item->ri_buf = |
| 1566 | kmem_zalloc(item->ri_total * sizeof(xfs_log_iovec_t), |
| 1567 | KM_SLEEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | } |
| 1569 | ASSERT(item->ri_total > item->ri_cnt); |
| 1570 | /* Description region is ri_buf[0] */ |
| 1571 | item->ri_buf[item->ri_cnt].i_addr = ptr; |
| 1572 | item->ri_buf[item->ri_cnt].i_len = len; |
| 1573 | item->ri_cnt++; |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1574 | trace_xfs_log_recover_item_add(log, trans, item, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | return 0; |
| 1576 | } |
| 1577 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1578 | /* |
| 1579 | * Sort the log items in the transaction. Cancelled buffers need |
| 1580 | * to be put first so they are processed before any items that might |
| 1581 | * modify the buffers. If they are cancelled, then the modifications |
| 1582 | * don't need to be replayed. |
| 1583 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | STATIC int |
| 1585 | xlog_recover_reorder_trans( |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1586 | struct log *log, |
| 1587 | xlog_recover_t *trans, |
| 1588 | int pass) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | { |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1590 | xlog_recover_item_t *item, *n; |
| 1591 | LIST_HEAD(sort_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1593 | list_splice_init(&trans->r_itemq, &sort_list); |
| 1594 | list_for_each_entry_safe(item, n, &sort_list, ri_list) { |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1595 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1596 | |
| 1597 | switch (ITEM_TYPE(item)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | case XFS_LI_BUF: |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1599 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1600 | trace_xfs_log_recover_item_reorder_head(log, |
| 1601 | trans, item, pass); |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1602 | list_move(&item->ri_list, &trans->r_itemq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | break; |
| 1604 | } |
| 1605 | case XFS_LI_INODE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | case XFS_LI_DQUOT: |
| 1607 | case XFS_LI_QUOTAOFF: |
| 1608 | case XFS_LI_EFD: |
| 1609 | case XFS_LI_EFI: |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1610 | trace_xfs_log_recover_item_reorder_tail(log, |
| 1611 | trans, item, pass); |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1612 | list_move_tail(&item->ri_list, &trans->r_itemq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | break; |
| 1614 | default: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1615 | xfs_warn(log->l_mp, |
| 1616 | "%s: unrecognized type of log operation", |
| 1617 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | ASSERT(0); |
| 1619 | return XFS_ERROR(EIO); |
| 1620 | } |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 1621 | } |
| 1622 | ASSERT(list_empty(&sort_list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | return 0; |
| 1624 | } |
| 1625 | |
| 1626 | /* |
| 1627 | * Build up the table of buf cancel records so that we don't replay |
| 1628 | * cancelled data in the second pass. For buffer records that are |
| 1629 | * not cancel records, there is nothing to do here so we just return. |
| 1630 | * |
| 1631 | * If we get a cancel record which is already in the table, this indicates |
| 1632 | * that the buffer was cancelled multiple times. In order to ensure |
| 1633 | * that during pass 2 we keep the record in the table until we reach its |
| 1634 | * last occurrence in the log, we keep a reference count in the cancel |
| 1635 | * record in the table to tell us how many times we expect to see this |
| 1636 | * record during the second pass. |
| 1637 | */ |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1638 | STATIC int |
| 1639 | xlog_recover_buffer_pass1( |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1640 | struct log *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1641 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1643 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1644 | struct list_head *bucket; |
| 1645 | struct xfs_buf_cancel *bcp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | |
| 1647 | /* |
| 1648 | * If this isn't a cancel buffer item, then just return. |
| 1649 | */ |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1650 | if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1651 | trace_xfs_log_recover_buf_not_cancel(log, buf_f); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1652 | return 0; |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1653 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
| 1655 | /* |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1656 | * Insert an xfs_buf_cancel record into the hash table of them. |
| 1657 | * If there is already an identical record, bump its reference count. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | */ |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1659 | bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); |
| 1660 | list_for_each_entry(bcp, bucket, bc_list) { |
| 1661 | if (bcp->bc_blkno == buf_f->blf_blkno && |
| 1662 | bcp->bc_len == buf_f->blf_len) { |
| 1663 | bcp->bc_refcount++; |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1664 | trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1665 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | } |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1668 | |
| 1669 | bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); |
| 1670 | bcp->bc_blkno = buf_f->blf_blkno; |
| 1671 | bcp->bc_len = buf_f->blf_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | bcp->bc_refcount = 1; |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1673 | list_add_tail(&bcp->bc_list, bucket); |
| 1674 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1675 | trace_xfs_log_recover_buf_cancel_add(log, buf_f); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 1676 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | } |
| 1678 | |
| 1679 | /* |
| 1680 | * Check to see whether the buffer being recovered has a corresponding |
| 1681 | * entry in the buffer cancel record table. If it does then return 1 |
| 1682 | * so that it will be cancelled, otherwise return 0. If the buffer is |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1683 | * actually a buffer cancel item (XFS_BLF_CANCEL is set), then decrement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | * the refcount on the entry in the table and remove it from the table |
| 1685 | * if this is the last reference. |
| 1686 | * |
| 1687 | * We remove the cancel record from the table when we encounter its |
| 1688 | * last occurrence in the log so that if the same buffer is re-used |
| 1689 | * again after its last cancellation we actually replay the changes |
| 1690 | * made at that point. |
| 1691 | */ |
| 1692 | STATIC int |
| 1693 | xlog_check_buffer_cancelled( |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1694 | struct log *log, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | xfs_daddr_t blkno, |
| 1696 | uint len, |
| 1697 | ushort flags) |
| 1698 | { |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1699 | struct list_head *bucket; |
| 1700 | struct xfs_buf_cancel *bcp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
| 1702 | if (log->l_buf_cancel_table == NULL) { |
| 1703 | /* |
| 1704 | * There is nothing in the table built in pass one, |
| 1705 | * so this buffer must not be cancelled. |
| 1706 | */ |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1707 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | return 0; |
| 1709 | } |
| 1710 | |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1711 | /* |
| 1712 | * Search for an entry in the cancel table that matches our buffer. |
| 1713 | */ |
| 1714 | bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); |
| 1715 | list_for_each_entry(bcp, bucket, bc_list) { |
| 1716 | if (bcp->bc_blkno == blkno && bcp->bc_len == len) |
| 1717 | goto found; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | } |
| 1719 | |
| 1720 | /* |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1721 | * We didn't find a corresponding entry in the table, so return 0 so |
| 1722 | * that the buffer is NOT cancelled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | */ |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1724 | ASSERT(!(flags & XFS_BLF_CANCEL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | return 0; |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 1726 | |
| 1727 | found: |
| 1728 | /* |
| 1729 | * We've go a match, so return 1 so that the recovery of this buffer |
| 1730 | * is cancelled. If this buffer is actually a buffer cancel log |
| 1731 | * item, then decrement the refcount on the one in the table and |
| 1732 | * remove it if this is the last reference. |
| 1733 | */ |
| 1734 | if (flags & XFS_BLF_CANCEL) { |
| 1735 | if (--bcp->bc_refcount == 0) { |
| 1736 | list_del(&bcp->bc_list); |
| 1737 | kmem_free(bcp); |
| 1738 | } |
| 1739 | } |
| 1740 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | } |
| 1742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | /* |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1744 | * Perform recovery for a buffer full of inodes. In these buffers, the only |
| 1745 | * data which should be recovered is that which corresponds to the |
| 1746 | * di_next_unlinked pointers in the on disk inode structures. The rest of the |
| 1747 | * data for the inodes is always logged through the inodes themselves rather |
| 1748 | * than the inode buffer and is recovered in xlog_recover_inode_pass2(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | * |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1750 | * The only time when buffers full of inodes are fully recovered is when the |
| 1751 | * buffer is full of newly allocated inodes. In this case the buffer will |
| 1752 | * not be marked as an inode buffer and so will be sent to |
| 1753 | * xlog_recover_do_reg_buffer() below during recovery. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | */ |
| 1755 | STATIC int |
| 1756 | xlog_recover_do_inode_buffer( |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1757 | struct xfs_mount *mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | xlog_recover_item_t *item, |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1759 | struct xfs_buf *bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | xfs_buf_log_format_t *buf_f) |
| 1761 | { |
| 1762 | int i; |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1763 | int item_index = 0; |
| 1764 | int bit = 0; |
| 1765 | int nbits = 0; |
| 1766 | int reg_buf_offset = 0; |
| 1767 | int reg_buf_bytes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | int next_unlinked_offset; |
| 1769 | int inodes_per_buf; |
| 1770 | xfs_agino_t *logged_nextp; |
| 1771 | xfs_agino_t *buffer_nextp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1773 | trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); |
| 1774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog; |
| 1776 | for (i = 0; i < inodes_per_buf; i++) { |
| 1777 | next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + |
| 1778 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 1779 | |
| 1780 | while (next_unlinked_offset >= |
| 1781 | (reg_buf_offset + reg_buf_bytes)) { |
| 1782 | /* |
| 1783 | * The next di_next_unlinked field is beyond |
| 1784 | * the current logged region. Find the next |
| 1785 | * logged region that contains or is beyond |
| 1786 | * the current di_next_unlinked field. |
| 1787 | */ |
| 1788 | bit += nbits; |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1789 | bit = xfs_next_bit(buf_f->blf_data_map, |
| 1790 | buf_f->blf_map_size, bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
| 1792 | /* |
| 1793 | * If there are no more logged regions in the |
| 1794 | * buffer, then we're done. |
| 1795 | */ |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1796 | if (bit == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1799 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
| 1800 | buf_f->blf_map_size, bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | ASSERT(nbits > 0); |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1802 | reg_buf_offset = bit << XFS_BLF_SHIFT; |
| 1803 | reg_buf_bytes = nbits << XFS_BLF_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | item_index++; |
| 1805 | } |
| 1806 | |
| 1807 | /* |
| 1808 | * If the current logged region starts after the current |
| 1809 | * di_next_unlinked field, then move on to the next |
| 1810 | * di_next_unlinked field. |
| 1811 | */ |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1812 | if (next_unlinked_offset < reg_buf_offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
| 1815 | ASSERT(item->ri_buf[item_index].i_addr != NULL); |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1816 | ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | ASSERT((reg_buf_offset + reg_buf_bytes) <= XFS_BUF_COUNT(bp)); |
| 1818 | |
| 1819 | /* |
| 1820 | * The current logged region contains a copy of the |
| 1821 | * current di_next_unlinked field. Extract its value |
| 1822 | * and copy it to the buffer copy. |
| 1823 | */ |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1824 | logged_nextp = item->ri_buf[item_index].i_addr + |
| 1825 | next_unlinked_offset - reg_buf_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | if (unlikely(*logged_nextp == 0)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1827 | xfs_alert(mp, |
| 1828 | "Bad inode buffer log record (ptr = 0x%p, bp = 0x%p). " |
| 1829 | "Trying to replay bad (0) inode di_next_unlinked field.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | item, bp); |
| 1831 | XFS_ERROR_REPORT("xlog_recover_do_inode_buf", |
| 1832 | XFS_ERRLEVEL_LOW, mp); |
| 1833 | return XFS_ERROR(EFSCORRUPTED); |
| 1834 | } |
| 1835 | |
| 1836 | buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp, |
| 1837 | next_unlinked_offset); |
Tim Shimmin | 87c199c | 2006-06-09 14:56:16 +1000 | [diff] [blame] | 1838 | *buffer_nextp = *logged_nextp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | } |
| 1840 | |
| 1841 | return 0; |
| 1842 | } |
| 1843 | |
| 1844 | /* |
| 1845 | * Perform a 'normal' buffer recovery. Each logged region of the |
| 1846 | * buffer should be copied over the corresponding region in the |
| 1847 | * given buffer. The bitmap in the buf log format structure indicates |
| 1848 | * where to place the logged data. |
| 1849 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | STATIC void |
| 1851 | xlog_recover_do_reg_buffer( |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1852 | struct xfs_mount *mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | xlog_recover_item_t *item, |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1854 | struct xfs_buf *bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | xfs_buf_log_format_t *buf_f) |
| 1856 | { |
| 1857 | int i; |
| 1858 | int bit; |
| 1859 | int nbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | int error; |
| 1861 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 1862 | trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); |
| 1863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | bit = 0; |
| 1865 | i = 1; /* 0 is the buf format structure */ |
| 1866 | while (1) { |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1867 | bit = xfs_next_bit(buf_f->blf_data_map, |
| 1868 | buf_f->blf_map_size, bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | if (bit == -1) |
| 1870 | break; |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 1871 | nbits = xfs_contig_bits(buf_f->blf_data_map, |
| 1872 | buf_f->blf_map_size, bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | ASSERT(nbits > 0); |
Christoph Hellwig | 4b80916 | 2007-08-16 15:37:36 +1000 | [diff] [blame] | 1874 | ASSERT(item->ri_buf[i].i_addr != NULL); |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1875 | ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | ASSERT(XFS_BUF_COUNT(bp) >= |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1877 | ((uint)bit << XFS_BLF_SHIFT)+(nbits<<XFS_BLF_SHIFT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
| 1879 | /* |
| 1880 | * Do a sanity check if this is a dquot buffer. Just checking |
| 1881 | * the first dquot in the buffer should do. XXXThis is |
| 1882 | * probably a good thing to do for other buf types also. |
| 1883 | */ |
| 1884 | error = 0; |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 1885 | if (buf_f->blf_flags & |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1886 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1887 | if (item->ri_buf[i].i_addr == NULL) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1888 | xfs_alert(mp, |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1889 | "XFS: NULL dquot in %s.", __func__); |
| 1890 | goto next; |
| 1891 | } |
Jan Rekorajski | 8ec6dba | 2009-11-16 11:57:02 +0000 | [diff] [blame] | 1892 | if (item->ri_buf[i].i_len < sizeof(xfs_disk_dquot_t)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1893 | xfs_alert(mp, |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1894 | "XFS: dquot too small (%d) in %s.", |
| 1895 | item->ri_buf[i].i_len, __func__); |
| 1896 | goto next; |
| 1897 | } |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1898 | error = xfs_qm_dqcheck(mp, item->ri_buf[i].i_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | -1, 0, XFS_QMOPT_DOWARN, |
| 1900 | "dquot_buf_recover"); |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1901 | if (error) |
| 1902 | goto next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1904 | |
| 1905 | memcpy(xfs_buf_offset(bp, |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1906 | (uint)bit << XFS_BLF_SHIFT), /* dest */ |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1907 | item->ri_buf[i].i_addr, /* source */ |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 1908 | nbits<<XFS_BLF_SHIFT); /* length */ |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 1909 | next: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | i++; |
| 1911 | bit += nbits; |
| 1912 | } |
| 1913 | |
| 1914 | /* Shouldn't be any more regions */ |
| 1915 | ASSERT(i == item->ri_total); |
| 1916 | } |
| 1917 | |
| 1918 | /* |
| 1919 | * Do some primitive error checking on ondisk dquot data structures. |
| 1920 | */ |
| 1921 | int |
| 1922 | xfs_qm_dqcheck( |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1923 | struct xfs_mount *mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | xfs_disk_dquot_t *ddq, |
| 1925 | xfs_dqid_t id, |
| 1926 | uint type, /* used only when IO_dorepair is true */ |
| 1927 | uint flags, |
| 1928 | char *str) |
| 1929 | { |
| 1930 | xfs_dqblk_t *d = (xfs_dqblk_t *)ddq; |
| 1931 | int errs = 0; |
| 1932 | |
| 1933 | /* |
| 1934 | * We can encounter an uninitialized dquot buffer for 2 reasons: |
| 1935 | * 1. If we crash while deleting the quotainode(s), and those blks got |
| 1936 | * used for user data. This is because we take the path of regular |
| 1937 | * file deletion; however, the size field of quotainodes is never |
| 1938 | * updated, so all the tricks that we play in itruncate_finish |
| 1939 | * don't quite matter. |
| 1940 | * |
| 1941 | * 2. We don't play the quota buffers when there's a quotaoff logitem. |
| 1942 | * But the allocation will be replayed so we'll end up with an |
| 1943 | * uninitialized quota block. |
| 1944 | * |
| 1945 | * This is all fine; things are still consistent, and we haven't lost |
| 1946 | * any quota information. Just don't complain about bad dquot blks. |
| 1947 | */ |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1948 | if (ddq->d_magic != cpu_to_be16(XFS_DQUOT_MAGIC)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1950 | xfs_alert(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1952 | str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | errs++; |
| 1954 | } |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1955 | if (ddq->d_version != XFS_DQUOT_VERSION) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1957 | xfs_alert(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1959 | str, id, ddq->d_version, XFS_DQUOT_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | errs++; |
| 1961 | } |
| 1962 | |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1963 | if (ddq->d_flags != XFS_DQ_USER && |
| 1964 | ddq->d_flags != XFS_DQ_PROJ && |
| 1965 | ddq->d_flags != XFS_DQ_GROUP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1967 | xfs_alert(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | "%s : XFS dquot ID 0x%x, unknown flags 0x%x", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1969 | str, id, ddq->d_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | errs++; |
| 1971 | } |
| 1972 | |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1973 | if (id != -1 && id != be32_to_cpu(ddq->d_id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1975 | xfs_alert(mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | "%s : ondisk-dquot 0x%p, ID mismatch: " |
| 1977 | "0x%x expected, found id 0x%x", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1978 | str, ddq, id, be32_to_cpu(ddq->d_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | errs++; |
| 1980 | } |
| 1981 | |
| 1982 | if (!errs && ddq->d_id) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1983 | if (ddq->d_blk_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 1984 | be64_to_cpu(ddq->d_bcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1985 | be64_to_cpu(ddq->d_blk_softlimit)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | if (!ddq->d_btimer) { |
| 1987 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1988 | xfs_alert(mp, |
| 1989 | "%s : Dquot ID 0x%x (0x%p) BLK TIMER NOT STARTED", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1990 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | errs++; |
| 1992 | } |
| 1993 | } |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1994 | if (ddq->d_ino_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 1995 | be64_to_cpu(ddq->d_icount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1996 | be64_to_cpu(ddq->d_ino_softlimit)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | if (!ddq->d_itimer) { |
| 1998 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 1999 | xfs_alert(mp, |
| 2000 | "%s : Dquot ID 0x%x (0x%p) INODE TIMER NOT STARTED", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 2001 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | errs++; |
| 2003 | } |
| 2004 | } |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 2005 | if (ddq->d_rtb_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 2006 | be64_to_cpu(ddq->d_rtbcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 2007 | be64_to_cpu(ddq->d_rtb_softlimit)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | if (!ddq->d_rtbtimer) { |
| 2009 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2010 | xfs_alert(mp, |
| 2011 | "%s : Dquot ID 0x%x (0x%p) RTBLK TIMER NOT STARTED", |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 2012 | str, (int)be32_to_cpu(ddq->d_id), ddq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | errs++; |
| 2014 | } |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | if (!errs || !(flags & XFS_QMOPT_DQREPAIR)) |
| 2019 | return errs; |
| 2020 | |
| 2021 | if (flags & XFS_QMOPT_DOWARN) |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2022 | xfs_notice(mp, "Re-initializing dquot ID 0x%x", id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | |
| 2024 | /* |
| 2025 | * Typically, a repair is only requested by quotacheck. |
| 2026 | */ |
| 2027 | ASSERT(id != -1); |
| 2028 | ASSERT(flags & XFS_QMOPT_DQREPAIR); |
| 2029 | memset(d, 0, sizeof(xfs_dqblk_t)); |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 2030 | |
| 2031 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); |
| 2032 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; |
| 2033 | d->dd_diskdq.d_flags = type; |
| 2034 | d->dd_diskdq.d_id = cpu_to_be32(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2035 | |
| 2036 | return errs; |
| 2037 | } |
| 2038 | |
| 2039 | /* |
| 2040 | * Perform a dquot buffer recovery. |
| 2041 | * Simple algorithm: if we have found a QUOTAOFF logitem of the same type |
| 2042 | * (ie. USR or GRP), then just toss this buffer away; don't recover it. |
| 2043 | * Else, treat it as a regular buffer and do recovery. |
| 2044 | */ |
| 2045 | STATIC void |
| 2046 | xlog_recover_do_dquot_buffer( |
| 2047 | xfs_mount_t *mp, |
| 2048 | xlog_t *log, |
| 2049 | xlog_recover_item_t *item, |
| 2050 | xfs_buf_t *bp, |
| 2051 | xfs_buf_log_format_t *buf_f) |
| 2052 | { |
| 2053 | uint type; |
| 2054 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2055 | trace_xfs_log_recover_buf_dquot_buf(log, buf_f); |
| 2056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | /* |
| 2058 | * Filesystems are required to send in quota flags at mount time. |
| 2059 | */ |
| 2060 | if (mp->m_qflags == 0) { |
| 2061 | return; |
| 2062 | } |
| 2063 | |
| 2064 | type = 0; |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 2065 | if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | type |= XFS_DQ_USER; |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 2067 | if (buf_f->blf_flags & XFS_BLF_PDQUOT_BUF) |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 2068 | type |= XFS_DQ_PROJ; |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 2069 | if (buf_f->blf_flags & XFS_BLF_GDQUOT_BUF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | type |= XFS_DQ_GROUP; |
| 2071 | /* |
| 2072 | * This type of quotas was turned off, so ignore this buffer |
| 2073 | */ |
| 2074 | if (log->l_quotaoffs_flag & type) |
| 2075 | return; |
| 2076 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2077 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * This routine replays a modification made to a buffer at runtime. |
| 2082 | * There are actually two types of buffer, regular and inode, which |
| 2083 | * are handled differently. Inode buffers are handled differently |
| 2084 | * in that we only recover a specific set of data from them, namely |
| 2085 | * the inode di_next_unlinked fields. This is because all other inode |
| 2086 | * data is actually logged via inode records and any data we replay |
| 2087 | * here which overlaps that may be stale. |
| 2088 | * |
| 2089 | * When meta-data buffers are freed at run time we log a buffer item |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 2090 | * with the XFS_BLF_CANCEL bit set to indicate that previous copies |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | * of the buffer in the log should not be replayed at recovery time. |
| 2092 | * This is so that if the blocks covered by the buffer are reused for |
| 2093 | * file data before we crash we don't end up replaying old, freed |
| 2094 | * meta-data into a user's file. |
| 2095 | * |
| 2096 | * To handle the cancellation of buffer log items, we make two passes |
| 2097 | * over the log during recovery. During the first we build a table of |
| 2098 | * those buffers which have been cancelled, and during the second we |
| 2099 | * only replay those buffers which do not have corresponding cancel |
| 2100 | * records in the table. See xlog_recover_do_buffer_pass[1,2] above |
| 2101 | * for more details on the implementation of the table of cancel records. |
| 2102 | */ |
| 2103 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2104 | xlog_recover_buffer_pass2( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | xlog_t *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2106 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | { |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2108 | xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 2109 | xfs_mount_t *mp = log->l_mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | xfs_buf_t *bp; |
| 2111 | int error; |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 2112 | uint buf_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2114 | /* |
| 2115 | * In this pass we only want to recover all the buffers which have |
| 2116 | * not been cancelled and are not cancellation buffers themselves. |
| 2117 | */ |
| 2118 | if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, |
| 2119 | buf_f->blf_len, buf_f->blf_flags)) { |
| 2120 | trace_xfs_log_recover_buf_cancel(log, buf_f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | } |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2123 | |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2124 | trace_xfs_log_recover_buf_recover(log, buf_f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2126 | buf_flags = XBF_LOCK; |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 2127 | if (!(buf_f->blf_flags & XFS_BLF_INODE_BUF)) |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2128 | buf_flags |= XBF_MAPPED; |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 2129 | |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 2130 | bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, |
| 2131 | buf_flags); |
Chandra Seetharaman | ac4d688 | 2011-08-03 02:18:29 +0000 | [diff] [blame] | 2132 | if (!bp) |
| 2133 | return XFS_ERROR(ENOMEM); |
Chandra Seetharaman | e570280 | 2011-08-03 02:18:34 +0000 | [diff] [blame] | 2134 | error = bp->b_error; |
Chandra Seetharaman | 5a52c2a58 | 2011-07-22 23:39:51 +0000 | [diff] [blame] | 2135 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 2136 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#1)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | xfs_buf_relse(bp); |
| 2138 | return error; |
| 2139 | } |
| 2140 | |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 2141 | if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); |
Christoph Hellwig | e2714bf | 2010-12-01 22:06:21 +0000 | [diff] [blame] | 2143 | } else if (buf_f->blf_flags & |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 2144 | (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); |
| 2146 | } else { |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2147 | xlog_recover_do_reg_buffer(mp, item, bp, buf_f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | } |
| 2149 | if (error) |
| 2150 | return XFS_ERROR(error); |
| 2151 | |
| 2152 | /* |
| 2153 | * Perform delayed write on the buffer. Asynchronous writes will be |
| 2154 | * slower when taking into account all the buffers to be flushed. |
| 2155 | * |
| 2156 | * Also make sure that only inode buffers with good sizes stay in |
| 2157 | * the buffer cache. The kernel moves inodes in buffers of 1 block |
| 2158 | * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode |
| 2159 | * buffers in the log can be a different size if the log was generated |
| 2160 | * by an older kernel using unclustered inode buffers or a newer kernel |
| 2161 | * running with a different inode cluster size. Regardless, if the |
| 2162 | * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE) |
| 2163 | * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep |
| 2164 | * the buffer out of the buffer cache so that the buffer won't |
| 2165 | * overlap with future reads of those inodes. |
| 2166 | */ |
| 2167 | if (XFS_DINODE_MAGIC == |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 2168 | be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | (XFS_BUF_COUNT(bp) != MAX(log->l_mp->m_sb.sb_blocksize, |
| 2170 | (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) { |
Christoph Hellwig | c867cb6 | 2011-10-10 16:52:46 +0000 | [diff] [blame] | 2171 | xfs_buf_stale(bp); |
Christoph Hellwig | c2b006c | 2011-08-23 08:28:07 +0000 | [diff] [blame] | 2172 | error = xfs_bwrite(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | } else { |
Dave Chinner | ebad861 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 2174 | ASSERT(bp->b_target->bt_mount == mp); |
Christoph Hellwig | cb669ca | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2175 | bp->b_iodone = xlog_recover_iodone; |
Christoph Hellwig | 61551f1 | 2011-08-23 08:28:06 +0000 | [diff] [blame] | 2176 | xfs_buf_delwri_queue(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | } |
| 2178 | |
Christoph Hellwig | c2b006c | 2011-08-23 08:28:07 +0000 | [diff] [blame] | 2179 | xfs_buf_relse(bp); |
| 2180 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | } |
| 2182 | |
| 2183 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2184 | xlog_recover_inode_pass2( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | xlog_t *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2186 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | { |
| 2188 | xfs_inode_log_format_t *in_f; |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2189 | xfs_mount_t *mp = log->l_mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | xfs_buf_t *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | xfs_dinode_t *dip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | int len; |
| 2193 | xfs_caddr_t src; |
| 2194 | xfs_caddr_t dest; |
| 2195 | int error; |
| 2196 | int attr_index; |
| 2197 | uint fields; |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2198 | xfs_icdinode_t *dicp; |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2199 | int need_free = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2201 | if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2202 | in_f = item->ri_buf[0].i_addr; |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2203 | } else { |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2204 | in_f = kmem_alloc(sizeof(xfs_inode_log_format_t), KM_SLEEP); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2205 | need_free = 1; |
| 2206 | error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f); |
| 2207 | if (error) |
| 2208 | goto error; |
| 2209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | |
| 2211 | /* |
| 2212 | * Inode buffers can be freed, look out for it, |
| 2213 | * and do not replay the inode. |
| 2214 | */ |
Christoph Hellwig | a194189 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 2215 | if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, |
| 2216 | in_f->ilf_len, 0)) { |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2217 | error = 0; |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2218 | trace_xfs_log_recover_inode_cancel(log, in_f); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2219 | goto error; |
| 2220 | } |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2221 | trace_xfs_log_recover_inode_recover(log, in_f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 2223 | bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2224 | XBF_LOCK); |
Chandra Seetharaman | ac4d688 | 2011-08-03 02:18:29 +0000 | [diff] [blame] | 2225 | if (!bp) { |
| 2226 | error = ENOMEM; |
| 2227 | goto error; |
| 2228 | } |
Chandra Seetharaman | e570280 | 2011-08-03 02:18:34 +0000 | [diff] [blame] | 2229 | error = bp->b_error; |
Chandra Seetharaman | 5a52c2a58 | 2011-07-22 23:39:51 +0000 | [diff] [blame] | 2230 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 2231 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#2)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | xfs_buf_relse(bp); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2233 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); |
Christoph Hellwig | a194189 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 2236 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | |
| 2238 | /* |
| 2239 | * Make sure the place we're flushing out to really looks |
| 2240 | * like an inode! |
| 2241 | */ |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 2242 | if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2244 | xfs_alert(mp, |
| 2245 | "%s: Bad inode magic number, dip = 0x%p, dino bp = 0x%p, ino = %Ld", |
| 2246 | __func__, dip, bp, in_f->ilf_ino); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2247 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | XFS_ERRLEVEL_LOW, mp); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2249 | error = EFSCORRUPTED; |
| 2250 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | } |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2252 | dicp = item->ri_buf[1].i_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) { |
| 2254 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2255 | xfs_alert(mp, |
| 2256 | "%s: Bad inode log record, rec ptr 0x%p, ino %Ld", |
| 2257 | __func__, item, in_f->ilf_ino); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2258 | XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | XFS_ERRLEVEL_LOW, mp); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2260 | error = EFSCORRUPTED; |
| 2261 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | /* Skip replay when the on disk inode is newer than the log one */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2265 | if (dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | /* |
| 2267 | * Deal with the wrap case, DI_MAX_FLUSH is less |
| 2268 | * than smaller numbers |
| 2269 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2270 | if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 2271 | dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | /* do nothing */ |
| 2273 | } else { |
| 2274 | xfs_buf_relse(bp); |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2275 | trace_xfs_log_recover_inode_skip(log, in_f); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2276 | error = 0; |
| 2277 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | } |
| 2279 | } |
| 2280 | /* Take the opportunity to reset the flush iteration count */ |
| 2281 | dicp->di_flushiter = 0; |
| 2282 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 2283 | if (unlikely(S_ISREG(dicp->di_mode))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
| 2285 | (dicp->di_format != XFS_DINODE_FMT_BTREE)) { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2286 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | XFS_ERRLEVEL_LOW, mp, dicp); |
| 2288 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2289 | xfs_alert(mp, |
| 2290 | "%s: Bad regular inode log record, rec ptr 0x%p, " |
| 2291 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", |
| 2292 | __func__, item, dip, bp, in_f->ilf_ino); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2293 | error = EFSCORRUPTED; |
| 2294 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | } |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 2296 | } else if (unlikely(S_ISDIR(dicp->di_mode))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2297 | if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && |
| 2298 | (dicp->di_format != XFS_DINODE_FMT_BTREE) && |
| 2299 | (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2300 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | XFS_ERRLEVEL_LOW, mp, dicp); |
| 2302 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2303 | xfs_alert(mp, |
| 2304 | "%s: Bad dir inode log record, rec ptr 0x%p, " |
| 2305 | "ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", |
| 2306 | __func__, item, dip, bp, in_f->ilf_ino); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2307 | error = EFSCORRUPTED; |
| 2308 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } |
| 2310 | } |
| 2311 | if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2312 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | XFS_ERRLEVEL_LOW, mp, dicp); |
| 2314 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2315 | xfs_alert(mp, |
| 2316 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " |
| 2317 | "dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", |
| 2318 | __func__, item, dip, bp, in_f->ilf_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | dicp->di_nextents + dicp->di_anextents, |
| 2320 | dicp->di_nblocks); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2321 | error = EFSCORRUPTED; |
| 2322 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | } |
| 2324 | if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2325 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | XFS_ERRLEVEL_LOW, mp, dicp); |
| 2327 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2328 | xfs_alert(mp, |
| 2329 | "%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, " |
| 2330 | "dino bp 0x%p, ino %Ld, forkoff 0x%x", __func__, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2331 | item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2332 | error = EFSCORRUPTED; |
| 2333 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | } |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2335 | if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2336 | XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | XFS_ERRLEVEL_LOW, mp, dicp); |
| 2338 | xfs_buf_relse(bp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2339 | xfs_alert(mp, |
| 2340 | "%s: Bad inode log record length %d, rec ptr 0x%p", |
| 2341 | __func__, item->ri_buf[1].i_len, item); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2342 | error = EFSCORRUPTED; |
| 2343 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | } |
| 2345 | |
| 2346 | /* The core is in in-core format */ |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2347 | xfs_dinode_to_disk(dip, item->ri_buf[1].i_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | |
| 2349 | /* the rest is in on-disk format */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2350 | if (item->ri_buf[1].i_len > sizeof(struct xfs_icdinode)) { |
| 2351 | memcpy((xfs_caddr_t) dip + sizeof(struct xfs_icdinode), |
| 2352 | item->ri_buf[1].i_addr + sizeof(struct xfs_icdinode), |
| 2353 | item->ri_buf[1].i_len - sizeof(struct xfs_icdinode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | } |
| 2355 | |
| 2356 | fields = in_f->ilf_fields; |
| 2357 | switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { |
| 2358 | case XFS_ILOG_DEV: |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2359 | xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | break; |
| 2361 | case XFS_ILOG_UUID: |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2362 | memcpy(XFS_DFORK_DPTR(dip), |
| 2363 | &in_f->ilf_u.ilfu_uuid, |
| 2364 | sizeof(uuid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | break; |
| 2366 | } |
| 2367 | |
| 2368 | if (in_f->ilf_size == 2) |
| 2369 | goto write_inode_buffer; |
| 2370 | len = item->ri_buf[2].i_len; |
| 2371 | src = item->ri_buf[2].i_addr; |
| 2372 | ASSERT(in_f->ilf_size <= 4); |
| 2373 | ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK)); |
| 2374 | ASSERT(!(fields & XFS_ILOG_DFORK) || |
| 2375 | (len == in_f->ilf_dsize)); |
| 2376 | |
| 2377 | switch (fields & XFS_ILOG_DFORK) { |
| 2378 | case XFS_ILOG_DDATA: |
| 2379 | case XFS_ILOG_DEXT: |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2380 | memcpy(XFS_DFORK_DPTR(dip), src, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | break; |
| 2382 | |
| 2383 | case XFS_ILOG_DBROOT: |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2384 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2385 | (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | XFS_DFORK_DSIZE(dip, mp)); |
| 2387 | break; |
| 2388 | |
| 2389 | default: |
| 2390 | /* |
| 2391 | * There are no data fork flags set. |
| 2392 | */ |
| 2393 | ASSERT((fields & XFS_ILOG_DFORK) == 0); |
| 2394 | break; |
| 2395 | } |
| 2396 | |
| 2397 | /* |
| 2398 | * If we logged any attribute data, recover it. There may or |
| 2399 | * may not have been any other non-core data logged in this |
| 2400 | * transaction. |
| 2401 | */ |
| 2402 | if (in_f->ilf_fields & XFS_ILOG_AFORK) { |
| 2403 | if (in_f->ilf_fields & XFS_ILOG_DFORK) { |
| 2404 | attr_index = 3; |
| 2405 | } else { |
| 2406 | attr_index = 2; |
| 2407 | } |
| 2408 | len = item->ri_buf[attr_index].i_len; |
| 2409 | src = item->ri_buf[attr_index].i_addr; |
| 2410 | ASSERT(len == in_f->ilf_asize); |
| 2411 | |
| 2412 | switch (in_f->ilf_fields & XFS_ILOG_AFORK) { |
| 2413 | case XFS_ILOG_ADATA: |
| 2414 | case XFS_ILOG_AEXT: |
| 2415 | dest = XFS_DFORK_APTR(dip); |
| 2416 | ASSERT(len <= XFS_DFORK_ASIZE(dip, mp)); |
| 2417 | memcpy(dest, src, len); |
| 2418 | break; |
| 2419 | |
| 2420 | case XFS_ILOG_ABROOT: |
| 2421 | dest = XFS_DFORK_APTR(dip); |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2422 | xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, |
| 2423 | len, (xfs_bmdr_block_t*)dest, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | XFS_DFORK_ASIZE(dip, mp)); |
| 2425 | break; |
| 2426 | |
| 2427 | default: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2428 | xfs_warn(log->l_mp, "%s: Invalid flag", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | ASSERT(0); |
| 2430 | xfs_buf_relse(bp); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2431 | error = EIO; |
| 2432 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | } |
| 2434 | } |
| 2435 | |
| 2436 | write_inode_buffer: |
Dave Chinner | ebad861 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 2437 | ASSERT(bp->b_target->bt_mount == mp); |
Christoph Hellwig | cb669ca | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2438 | bp->b_iodone = xlog_recover_iodone; |
Christoph Hellwig | 61551f1 | 2011-08-23 08:28:06 +0000 | [diff] [blame] | 2439 | xfs_buf_delwri_queue(bp); |
| 2440 | xfs_buf_relse(bp); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2441 | error: |
| 2442 | if (need_free) |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2443 | kmem_free(in_f); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2444 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | } |
| 2446 | |
| 2447 | /* |
| 2448 | * Recover QUOTAOFF records. We simply make a note of it in the xlog_t |
| 2449 | * structure, so that we know not to do any dquot item or dquot buffer recovery, |
| 2450 | * of that type. |
| 2451 | */ |
| 2452 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2453 | xlog_recover_quotaoff_pass1( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | xlog_t *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2455 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2457 | xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | ASSERT(qoff_f); |
| 2459 | |
| 2460 | /* |
| 2461 | * The logitem format's flag tells us if this was user quotaoff, |
Nathan Scott | 77a7cce | 2006-01-11 15:35:57 +1100 | [diff] [blame] | 2462 | * group/project quotaoff or both. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | */ |
| 2464 | if (qoff_f->qf_flags & XFS_UQUOTA_ACCT) |
| 2465 | log->l_quotaoffs_flag |= XFS_DQ_USER; |
Nathan Scott | 77a7cce | 2006-01-11 15:35:57 +1100 | [diff] [blame] | 2466 | if (qoff_f->qf_flags & XFS_PQUOTA_ACCT) |
| 2467 | log->l_quotaoffs_flag |= XFS_DQ_PROJ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | if (qoff_f->qf_flags & XFS_GQUOTA_ACCT) |
| 2469 | log->l_quotaoffs_flag |= XFS_DQ_GROUP; |
| 2470 | |
| 2471 | return (0); |
| 2472 | } |
| 2473 | |
| 2474 | /* |
| 2475 | * Recover a dquot record |
| 2476 | */ |
| 2477 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2478 | xlog_recover_dquot_pass2( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | xlog_t *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2480 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2482 | xfs_mount_t *mp = log->l_mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | xfs_buf_t *bp; |
| 2484 | struct xfs_disk_dquot *ddq, *recddq; |
| 2485 | int error; |
| 2486 | xfs_dq_logformat_t *dq_f; |
| 2487 | uint type; |
| 2488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | |
| 2490 | /* |
| 2491 | * Filesystems are required to send in quota flags at mount time. |
| 2492 | */ |
| 2493 | if (mp->m_qflags == 0) |
| 2494 | return (0); |
| 2495 | |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2496 | recddq = item->ri_buf[1].i_addr; |
| 2497 | if (recddq == NULL) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2498 | xfs_alert(log->l_mp, "NULL dquot in %s.", __func__); |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 2499 | return XFS_ERROR(EIO); |
| 2500 | } |
Jan Rekorajski | 8ec6dba | 2009-11-16 11:57:02 +0000 | [diff] [blame] | 2501 | if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2502 | xfs_alert(log->l_mp, "dquot too small (%d) in %s.", |
Christoph Hellwig | 0c5e1ce | 2009-06-08 15:33:21 +0200 | [diff] [blame] | 2503 | item->ri_buf[1].i_len, __func__); |
| 2504 | return XFS_ERROR(EIO); |
| 2505 | } |
| 2506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | /* |
| 2508 | * This type of quotas was turned off, so ignore this record. |
| 2509 | */ |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 2510 | type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | ASSERT(type); |
| 2512 | if (log->l_quotaoffs_flag & type) |
| 2513 | return (0); |
| 2514 | |
| 2515 | /* |
| 2516 | * At this point we know that quota was _not_ turned off. |
| 2517 | * Since the mount flags are not indicating to us otherwise, this |
| 2518 | * must mean that quota is on, and the dquot needs to be replayed. |
| 2519 | * Remember that we may not have fully recovered the superblock yet, |
| 2520 | * so we can't do the usual trick of looking at the SB quota bits. |
| 2521 | * |
| 2522 | * The other possibility, of course, is that the quota subsystem was |
| 2523 | * removed since the last mount - ENOSYS. |
| 2524 | */ |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2525 | dq_f = item->ri_buf[0].i_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | ASSERT(dq_f); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2527 | error = xfs_qm_dqcheck(mp, recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
| 2528 | "xlog_recover_dquot_pass2 (log copy)"); |
| 2529 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | return XFS_ERROR(EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | ASSERT(dq_f->qlf_len == 1); |
| 2532 | |
| 2533 | error = xfs_read_buf(mp, mp->m_ddev_targp, |
| 2534 | dq_f->qlf_blkno, |
| 2535 | XFS_FSB_TO_BB(mp, dq_f->qlf_len), |
| 2536 | 0, &bp); |
| 2537 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 2538 | xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#3)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | return error; |
| 2540 | } |
| 2541 | ASSERT(bp); |
| 2542 | ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset); |
| 2543 | |
| 2544 | /* |
| 2545 | * At least the magic num portion should be on disk because this |
| 2546 | * was among a chunk of dquots created earlier, and we did some |
| 2547 | * minimal initialization then. |
| 2548 | */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2549 | error = xfs_qm_dqcheck(mp, ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, |
| 2550 | "xlog_recover_dquot_pass2"); |
| 2551 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | xfs_buf_relse(bp); |
| 2553 | return XFS_ERROR(EIO); |
| 2554 | } |
| 2555 | |
| 2556 | memcpy(ddq, recddq, item->ri_buf[1].i_len); |
| 2557 | |
| 2558 | ASSERT(dq_f->qlf_size == 2); |
Dave Chinner | ebad861 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 2559 | ASSERT(bp->b_target->bt_mount == mp); |
Christoph Hellwig | cb669ca | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2560 | bp->b_iodone = xlog_recover_iodone; |
Christoph Hellwig | 61551f1 | 2011-08-23 08:28:06 +0000 | [diff] [blame] | 2561 | xfs_buf_delwri_queue(bp); |
| 2562 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | |
| 2564 | return (0); |
| 2565 | } |
| 2566 | |
| 2567 | /* |
| 2568 | * This routine is called to create an in-core extent free intent |
| 2569 | * item from the efi format structure which was logged on disk. |
| 2570 | * It allocates an in-core efi, copies the extents from the format |
| 2571 | * structure into it, and adds the efi to the AIL with the given |
| 2572 | * LSN. |
| 2573 | */ |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2574 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2575 | xlog_recover_efi_pass2( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | xlog_t *log, |
| 2577 | xlog_recover_item_t *item, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2578 | xfs_lsn_t lsn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | { |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2580 | int error; |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2581 | xfs_mount_t *mp = log->l_mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | xfs_efi_log_item_t *efip; |
| 2583 | xfs_efi_log_format_t *efi_formatp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2585 | efi_formatp = item->ri_buf[0].i_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | efip = xfs_efi_init(mp, efi_formatp->efi_nextents); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2588 | if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), |
| 2589 | &(efip->efi_format)))) { |
| 2590 | xfs_efi_item_free(efip); |
| 2591 | return error; |
| 2592 | } |
Dave Chinner | b199c8a | 2010-12-20 11:59:49 +1100 | [diff] [blame] | 2593 | atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2595 | spin_lock(&log->l_ailp->xa_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | /* |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2597 | * xfs_trans_ail_update() drops the AIL lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | */ |
Dave Chinner | e605994 | 2010-12-20 12:34:26 +1100 | [diff] [blame] | 2599 | xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2600 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | } |
| 2602 | |
| 2603 | |
| 2604 | /* |
| 2605 | * This routine is called when an efd format structure is found in |
| 2606 | * a committed transaction in the log. It's purpose is to cancel |
| 2607 | * the corresponding efi if it was still in the log. To do this |
| 2608 | * it searches the AIL for the efi with an id equal to that in the |
| 2609 | * efd format structure. If we find it, we remove the efi from the |
| 2610 | * AIL and free it. |
| 2611 | */ |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2612 | STATIC int |
| 2613 | xlog_recover_efd_pass2( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | xlog_t *log, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2615 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | xfs_efd_log_format_t *efd_formatp; |
| 2618 | xfs_efi_log_item_t *efip = NULL; |
| 2619 | xfs_log_item_t *lip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | __uint64_t efi_id; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2621 | struct xfs_ail_cursor cur; |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2622 | struct xfs_ail *ailp = log->l_ailp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | |
Christoph Hellwig | 4e0d5f9 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2624 | efd_formatp = item->ri_buf[0].i_addr; |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 2625 | ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + |
| 2626 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || |
| 2627 | (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) + |
| 2628 | ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t))))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | efi_id = efd_formatp->efd_efi_id; |
| 2630 | |
| 2631 | /* |
| 2632 | * Search for the efi with the id in the efd format structure |
| 2633 | * in the AIL. |
| 2634 | */ |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2635 | spin_lock(&ailp->xa_lock); |
| 2636 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2637 | while (lip != NULL) { |
| 2638 | if (lip->li_type == XFS_LI_EFI) { |
| 2639 | efip = (xfs_efi_log_item_t *)lip; |
| 2640 | if (efip->efi_format.efi_id == efi_id) { |
| 2641 | /* |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2642 | * xfs_trans_ail_delete() drops the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2643 | * AIL lock. |
| 2644 | */ |
David Chinner | 783a2f6 | 2008-10-30 17:39:58 +1100 | [diff] [blame] | 2645 | xfs_trans_ail_delete(ailp, lip); |
David Chinner | 8ae2c0f | 2007-11-23 16:28:17 +1100 | [diff] [blame] | 2646 | xfs_efi_item_free(efip); |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2647 | spin_lock(&ailp->xa_lock); |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2648 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2649 | } |
| 2650 | } |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2651 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | } |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2653 | xfs_trans_ail_cursor_done(ailp, &cur); |
| 2654 | spin_unlock(&ailp->xa_lock); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2655 | |
| 2656 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2657 | } |
| 2658 | |
| 2659 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | * Free up any resources allocated by the transaction |
| 2661 | * |
| 2662 | * Remember that EFIs, EFDs, and IUNLINKs are handled later. |
| 2663 | */ |
| 2664 | STATIC void |
| 2665 | xlog_recover_free_trans( |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2666 | struct xlog_recover *trans) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | { |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2668 | xlog_recover_item_t *item, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | int i; |
| 2670 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2671 | list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) { |
| 2672 | /* Free the regions in the item. */ |
| 2673 | list_del(&item->ri_list); |
| 2674 | for (i = 0; i < item->ri_cnt; i++) |
| 2675 | kmem_free(item->ri_buf[i].i_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | /* Free the item itself */ |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2677 | kmem_free(item->ri_buf); |
| 2678 | kmem_free(item); |
| 2679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2680 | /* Free the transaction recover structure */ |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2681 | kmem_free(trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | } |
| 2683 | |
| 2684 | STATIC int |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2685 | xlog_recover_commit_pass1( |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2686 | struct log *log, |
| 2687 | struct xlog_recover *trans, |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2688 | xlog_recover_item_t *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2690 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2691 | |
| 2692 | switch (ITEM_TYPE(item)) { |
| 2693 | case XFS_LI_BUF: |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2694 | return xlog_recover_buffer_pass1(log, item); |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2695 | case XFS_LI_QUOTAOFF: |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2696 | return xlog_recover_quotaoff_pass1(log, item); |
| 2697 | case XFS_LI_INODE: |
| 2698 | case XFS_LI_EFI: |
| 2699 | case XFS_LI_EFD: |
| 2700 | case XFS_LI_DQUOT: |
| 2701 | /* nothing to do in pass 1 */ |
| 2702 | return 0; |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2703 | default: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2704 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
| 2705 | __func__, ITEM_TYPE(item)); |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2706 | ASSERT(0); |
| 2707 | return XFS_ERROR(EIO); |
| 2708 | } |
| 2709 | } |
| 2710 | |
| 2711 | STATIC int |
| 2712 | xlog_recover_commit_pass2( |
| 2713 | struct log *log, |
| 2714 | struct xlog_recover *trans, |
| 2715 | xlog_recover_item_t *item) |
| 2716 | { |
| 2717 | trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); |
| 2718 | |
| 2719 | switch (ITEM_TYPE(item)) { |
| 2720 | case XFS_LI_BUF: |
| 2721 | return xlog_recover_buffer_pass2(log, item); |
| 2722 | case XFS_LI_INODE: |
| 2723 | return xlog_recover_inode_pass2(log, item); |
| 2724 | case XFS_LI_EFI: |
| 2725 | return xlog_recover_efi_pass2(log, item, trans->r_lsn); |
| 2726 | case XFS_LI_EFD: |
| 2727 | return xlog_recover_efd_pass2(log, item); |
| 2728 | case XFS_LI_DQUOT: |
| 2729 | return xlog_recover_dquot_pass2(log, item); |
| 2730 | case XFS_LI_QUOTAOFF: |
| 2731 | /* nothing to do in pass2 */ |
| 2732 | return 0; |
| 2733 | default: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2734 | xfs_warn(log->l_mp, "%s: invalid item type (%d)", |
| 2735 | __func__, ITEM_TYPE(item)); |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2736 | ASSERT(0); |
| 2737 | return XFS_ERROR(EIO); |
| 2738 | } |
| 2739 | } |
| 2740 | |
| 2741 | /* |
| 2742 | * Perform the transaction. |
| 2743 | * |
| 2744 | * If the transaction modifies a buffer or inode, do it now. Otherwise, |
| 2745 | * EFIs and EFDs get queued up by adding entries into the AIL for them. |
| 2746 | */ |
| 2747 | STATIC int |
| 2748 | xlog_recover_commit_trans( |
| 2749 | struct log *log, |
| 2750 | struct xlog_recover *trans, |
| 2751 | int pass) |
| 2752 | { |
| 2753 | int error = 0; |
| 2754 | xlog_recover_item_t *item; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2756 | hlist_del(&trans->r_list); |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2757 | |
| 2758 | error = xlog_recover_reorder_trans(log, trans, pass); |
| 2759 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | return error; |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2761 | |
| 2762 | list_for_each_entry(item, &trans->r_itemq, ri_list) { |
Christoph Hellwig | c9f71f5 | 2010-12-01 22:06:24 +0000 | [diff] [blame] | 2763 | if (pass == XLOG_RECOVER_PASS1) |
| 2764 | error = xlog_recover_commit_pass1(log, trans, item); |
| 2765 | else |
| 2766 | error = xlog_recover_commit_pass2(log, trans, item); |
Christoph Hellwig | d045094 | 2010-12-01 22:06:23 +0000 | [diff] [blame] | 2767 | if (error) |
| 2768 | return error; |
| 2769 | } |
| 2770 | |
| 2771 | xlog_recover_free_trans(trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | return 0; |
| 2773 | } |
| 2774 | |
| 2775 | STATIC int |
| 2776 | xlog_recover_unmount_trans( |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2777 | struct log *log, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | xlog_recover_t *trans) |
| 2779 | { |
| 2780 | /* Do nothing now */ |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2781 | xfs_warn(log->l_mp, "%s: Unmount LR", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | return 0; |
| 2783 | } |
| 2784 | |
| 2785 | /* |
| 2786 | * There are two valid states of the r_state field. 0 indicates that the |
| 2787 | * transaction structure is in a normal state. We have either seen the |
| 2788 | * start of the transaction or the last operation we added was not a partial |
| 2789 | * operation. If the last operation we added to the transaction was a |
| 2790 | * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS. |
| 2791 | * |
| 2792 | * NOTE: skip LRs with 0 data length. |
| 2793 | */ |
| 2794 | STATIC int |
| 2795 | xlog_recover_process_data( |
| 2796 | xlog_t *log, |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2797 | struct hlist_head rhash[], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | xlog_rec_header_t *rhead, |
| 2799 | xfs_caddr_t dp, |
| 2800 | int pass) |
| 2801 | { |
| 2802 | xfs_caddr_t lp; |
| 2803 | int num_logops; |
| 2804 | xlog_op_header_t *ohead; |
| 2805 | xlog_recover_t *trans; |
| 2806 | xlog_tid_t tid; |
| 2807 | int error; |
| 2808 | unsigned long hash; |
| 2809 | uint flags; |
| 2810 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 2811 | lp = dp + be32_to_cpu(rhead->h_len); |
| 2812 | num_logops = be32_to_cpu(rhead->h_num_logops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | |
| 2814 | /* check the log format matches our own - else we can't recover */ |
| 2815 | if (xlog_header_check_recover(log->l_mp, rhead)) |
| 2816 | return (XFS_ERROR(EIO)); |
| 2817 | |
| 2818 | while ((dp < lp) && num_logops) { |
| 2819 | ASSERT(dp + sizeof(xlog_op_header_t) <= lp); |
| 2820 | ohead = (xlog_op_header_t *)dp; |
| 2821 | dp += sizeof(xlog_op_header_t); |
| 2822 | if (ohead->oh_clientid != XFS_TRANSACTION && |
| 2823 | ohead->oh_clientid != XFS_LOG) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2824 | xfs_warn(log->l_mp, "%s: bad clientid 0x%x", |
| 2825 | __func__, ohead->oh_clientid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | ASSERT(0); |
| 2827 | return (XFS_ERROR(EIO)); |
| 2828 | } |
Christoph Hellwig | 67fcb7b | 2007-10-12 10:58:59 +1000 | [diff] [blame] | 2829 | tid = be32_to_cpu(ohead->oh_tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | hash = XLOG_RHASH(tid); |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2831 | trans = xlog_recover_find_tid(&rhash[hash], tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | if (trans == NULL) { /* not found; add new tid */ |
| 2833 | if (ohead->oh_flags & XLOG_START_TRANS) |
| 2834 | xlog_recover_new_tid(&rhash[hash], tid, |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 2835 | be64_to_cpu(rhead->h_lsn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | } else { |
Lachlan McIlroy | 9742bb9 | 2008-01-10 16:43:36 +1100 | [diff] [blame] | 2837 | if (dp + be32_to_cpu(ohead->oh_len) > lp) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2838 | xfs_warn(log->l_mp, "%s: bad length 0x%x", |
| 2839 | __func__, be32_to_cpu(ohead->oh_len)); |
Lachlan McIlroy | 9742bb9 | 2008-01-10 16:43:36 +1100 | [diff] [blame] | 2840 | WARN_ON(1); |
| 2841 | return (XFS_ERROR(EIO)); |
| 2842 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | flags = ohead->oh_flags & ~XLOG_END_TRANS; |
| 2844 | if (flags & XLOG_WAS_CONT_TRANS) |
| 2845 | flags &= ~XLOG_CONTINUE_TRANS; |
| 2846 | switch (flags) { |
| 2847 | case XLOG_COMMIT_TRANS: |
| 2848 | error = xlog_recover_commit_trans(log, |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 2849 | trans, pass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | break; |
| 2851 | case XLOG_UNMOUNT_TRANS: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2852 | error = xlog_recover_unmount_trans(log, trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | break; |
| 2854 | case XLOG_WAS_CONT_TRANS: |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2855 | error = xlog_recover_add_to_cont_trans(log, |
| 2856 | trans, dp, |
| 2857 | be32_to_cpu(ohead->oh_len)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | break; |
| 2859 | case XLOG_START_TRANS: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2860 | xfs_warn(log->l_mp, "%s: bad transaction", |
| 2861 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | ASSERT(0); |
| 2863 | error = XFS_ERROR(EIO); |
| 2864 | break; |
| 2865 | case 0: |
| 2866 | case XLOG_CONTINUE_TRANS: |
Dave Chinner | 9abbc53 | 2010-04-13 15:06:46 +1000 | [diff] [blame] | 2867 | error = xlog_recover_add_to_trans(log, trans, |
Christoph Hellwig | 67fcb7b | 2007-10-12 10:58:59 +1000 | [diff] [blame] | 2868 | dp, be32_to_cpu(ohead->oh_len)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | break; |
| 2870 | default: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 2871 | xfs_warn(log->l_mp, "%s: bad flag 0x%x", |
| 2872 | __func__, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | ASSERT(0); |
| 2874 | error = XFS_ERROR(EIO); |
| 2875 | break; |
| 2876 | } |
| 2877 | if (error) |
| 2878 | return error; |
| 2879 | } |
Christoph Hellwig | 67fcb7b | 2007-10-12 10:58:59 +1000 | [diff] [blame] | 2880 | dp += be32_to_cpu(ohead->oh_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | num_logops--; |
| 2882 | } |
| 2883 | return 0; |
| 2884 | } |
| 2885 | |
| 2886 | /* |
| 2887 | * Process an extent free intent item that was recovered from |
| 2888 | * the log. We need to free the extents that it describes. |
| 2889 | */ |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2890 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | xlog_recover_process_efi( |
| 2892 | xfs_mount_t *mp, |
| 2893 | xfs_efi_log_item_t *efip) |
| 2894 | { |
| 2895 | xfs_efd_log_item_t *efdp; |
| 2896 | xfs_trans_t *tp; |
| 2897 | int i; |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2898 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2899 | xfs_extent_t *extp; |
| 2900 | xfs_fsblock_t startblock_fsb; |
| 2901 | |
Dave Chinner | b199c8a | 2010-12-20 11:59:49 +1100 | [diff] [blame] | 2902 | ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2903 | |
| 2904 | /* |
| 2905 | * First check the validity of the extents described by the |
| 2906 | * EFI. If any are bad, then assume that all are bad and |
| 2907 | * just toss the EFI. |
| 2908 | */ |
| 2909 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { |
| 2910 | extp = &(efip->efi_format.efi_extents[i]); |
| 2911 | startblock_fsb = XFS_BB_TO_FSB(mp, |
| 2912 | XFS_FSB_TO_DADDR(mp, extp->ext_start)); |
| 2913 | if ((startblock_fsb == 0) || |
| 2914 | (extp->ext_len == 0) || |
| 2915 | (startblock_fsb >= mp->m_sb.sb_dblocks) || |
| 2916 | (extp->ext_len >= mp->m_sb.sb_agblocks)) { |
| 2917 | /* |
| 2918 | * This will pull the EFI from the AIL and |
| 2919 | * free the memory associated with it. |
| 2920 | */ |
| 2921 | xfs_efi_release(efip, efip->efi_format.efi_nextents); |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2922 | return XFS_ERROR(EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2923 | } |
| 2924 | } |
| 2925 | |
| 2926 | tp = xfs_trans_alloc(mp, 0); |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2927 | error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 0, 0); |
David Chinner | fc6149d | 2008-04-10 12:21:53 +1000 | [diff] [blame] | 2928 | if (error) |
| 2929 | goto abort_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents); |
| 2931 | |
| 2932 | for (i = 0; i < efip->efi_format.efi_nextents; i++) { |
| 2933 | extp = &(efip->efi_format.efi_extents[i]); |
David Chinner | fc6149d | 2008-04-10 12:21:53 +1000 | [diff] [blame] | 2934 | error = xfs_free_extent(tp, extp->ext_start, extp->ext_len); |
| 2935 | if (error) |
| 2936 | goto abort_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2937 | xfs_trans_log_efd_extent(tp, efdp, extp->ext_start, |
| 2938 | extp->ext_len); |
| 2939 | } |
| 2940 | |
Dave Chinner | b199c8a | 2010-12-20 11:59:49 +1100 | [diff] [blame] | 2941 | set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 2942 | error = xfs_trans_commit(tp, 0); |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2943 | return error; |
David Chinner | fc6149d | 2008-04-10 12:21:53 +1000 | [diff] [blame] | 2944 | |
| 2945 | abort_error: |
| 2946 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); |
| 2947 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2948 | } |
| 2949 | |
| 2950 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2951 | * When this is called, all of the EFIs which did not have |
| 2952 | * corresponding EFDs should be in the AIL. What we do now |
| 2953 | * is free the extents associated with each one. |
| 2954 | * |
| 2955 | * Since we process the EFIs in normal transactions, they |
| 2956 | * will be removed at some point after the commit. This prevents |
| 2957 | * us from just walking down the list processing each one. |
| 2958 | * We'll use a flag in the EFI to skip those that we've already |
| 2959 | * processed and use the AIL iteration mechanism's generation |
| 2960 | * count to try to speed this up at least a bit. |
| 2961 | * |
| 2962 | * When we start, we know that the EFIs are the only things in |
| 2963 | * the AIL. As we process them, however, other items are added |
| 2964 | * to the AIL. Since everything added to the AIL must come after |
| 2965 | * everything already in the AIL, we stop processing as soon as |
| 2966 | * we see something other than an EFI in the AIL. |
| 2967 | */ |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2968 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | xlog_recover_process_efis( |
| 2970 | xlog_t *log) |
| 2971 | { |
| 2972 | xfs_log_item_t *lip; |
| 2973 | xfs_efi_log_item_t *efip; |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 2974 | int error = 0; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2975 | struct xfs_ail_cursor cur; |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2976 | struct xfs_ail *ailp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2978 | ailp = log->l_ailp; |
| 2979 | spin_lock(&ailp->xa_lock); |
| 2980 | lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | while (lip != NULL) { |
| 2982 | /* |
| 2983 | * We're done when we see something other than an EFI. |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2984 | * There should be no EFIs left in the AIL now. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | */ |
| 2986 | if (lip->li_type != XFS_LI_EFI) { |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2987 | #ifdef DEBUG |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2988 | for (; lip; lip = xfs_trans_ail_cursor_next(ailp, &cur)) |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 2989 | ASSERT(lip->li_type != XFS_LI_EFI); |
| 2990 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | break; |
| 2992 | } |
| 2993 | |
| 2994 | /* |
| 2995 | * Skip EFIs that we've already processed. |
| 2996 | */ |
| 2997 | efip = (xfs_efi_log_item_t *)lip; |
Dave Chinner | b199c8a | 2010-12-20 11:59:49 +1100 | [diff] [blame] | 2998 | if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 2999 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | continue; |
| 3001 | } |
| 3002 | |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 3003 | spin_unlock(&ailp->xa_lock); |
| 3004 | error = xlog_recover_process_efi(log->l_mp, efip); |
| 3005 | spin_lock(&ailp->xa_lock); |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 3006 | if (error) |
| 3007 | goto out; |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 3008 | lip = xfs_trans_ail_cursor_next(ailp, &cur); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | } |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 3010 | out: |
David Chinner | a9c21c1 | 2008-10-30 17:39:35 +1100 | [diff] [blame] | 3011 | xfs_trans_ail_cursor_done(ailp, &cur); |
| 3012 | spin_unlock(&ailp->xa_lock); |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 3013 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | } |
| 3015 | |
| 3016 | /* |
| 3017 | * This routine performs a transaction to null out a bad inode pointer |
| 3018 | * in an agi unlinked inode hash bucket. |
| 3019 | */ |
| 3020 | STATIC void |
| 3021 | xlog_recover_clear_agi_bucket( |
| 3022 | xfs_mount_t *mp, |
| 3023 | xfs_agnumber_t agno, |
| 3024 | int bucket) |
| 3025 | { |
| 3026 | xfs_trans_t *tp; |
| 3027 | xfs_agi_t *agi; |
| 3028 | xfs_buf_t *agibp; |
| 3029 | int offset; |
| 3030 | int error; |
| 3031 | |
| 3032 | tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3033 | error = xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), |
| 3034 | 0, 0, 0); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 3035 | if (error) |
| 3036 | goto out_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3038 | error = xfs_read_agi(mp, tp, agno, &agibp); |
| 3039 | if (error) |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 3040 | goto out_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3041 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3042 | agi = XFS_BUF_TO_AGI(agibp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 3043 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3044 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
| 3045 | (sizeof(xfs_agino_t) * bucket); |
| 3046 | xfs_trans_log_buf(tp, agibp, offset, |
| 3047 | (offset + sizeof(xfs_agino_t) - 1)); |
| 3048 | |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 3049 | error = xfs_trans_commit(tp, 0); |
| 3050 | if (error) |
| 3051 | goto out_error; |
| 3052 | return; |
| 3053 | |
| 3054 | out_abort: |
| 3055 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); |
| 3056 | out_error: |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3057 | xfs_warn(mp, "%s: failed to clear agi %d. Continuing.", __func__, agno); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 3058 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | } |
| 3060 | |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3061 | STATIC xfs_agino_t |
| 3062 | xlog_recover_process_one_iunlink( |
| 3063 | struct xfs_mount *mp, |
| 3064 | xfs_agnumber_t agno, |
| 3065 | xfs_agino_t agino, |
| 3066 | int bucket) |
| 3067 | { |
| 3068 | struct xfs_buf *ibp; |
| 3069 | struct xfs_dinode *dip; |
| 3070 | struct xfs_inode *ip; |
| 3071 | xfs_ino_t ino; |
| 3072 | int error; |
| 3073 | |
| 3074 | ino = XFS_AGINO_TO_INO(mp, agno, agino); |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 3075 | error = xfs_iget(mp, NULL, ino, 0, 0, &ip); |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3076 | if (error) |
| 3077 | goto fail; |
| 3078 | |
| 3079 | /* |
| 3080 | * Get the on disk inode to find the next inode in the bucket. |
| 3081 | */ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 3082 | error = xfs_itobp(mp, NULL, ip, &dip, &ibp, XBF_LOCK); |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3083 | if (error) |
Christoph Hellwig | 0e44667 | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 3084 | goto fail_iput; |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3085 | |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3086 | ASSERT(ip->i_d.di_nlink == 0); |
Christoph Hellwig | 0e44667 | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 3087 | ASSERT(ip->i_d.di_mode != 0); |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3088 | |
| 3089 | /* setup for the next pass */ |
| 3090 | agino = be32_to_cpu(dip->di_next_unlinked); |
| 3091 | xfs_buf_relse(ibp); |
| 3092 | |
| 3093 | /* |
| 3094 | * Prevent any DMAPI event from being sent when the reference on |
| 3095 | * the inode is dropped. |
| 3096 | */ |
| 3097 | ip->i_d.di_dmevmask = 0; |
| 3098 | |
Christoph Hellwig | 0e44667 | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 3099 | IRELE(ip); |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3100 | return agino; |
| 3101 | |
Christoph Hellwig | 0e44667 | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 3102 | fail_iput: |
| 3103 | IRELE(ip); |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3104 | fail: |
| 3105 | /* |
| 3106 | * We can't read in the inode this bucket points to, or this inode |
| 3107 | * is messed up. Just ditch this bucket of inodes. We will lose |
| 3108 | * some inodes and space, but at least we won't hang. |
| 3109 | * |
| 3110 | * Call xlog_recover_clear_agi_bucket() to perform a transaction to |
| 3111 | * clear the inode pointer in the bucket. |
| 3112 | */ |
| 3113 | xlog_recover_clear_agi_bucket(mp, agno, bucket); |
| 3114 | return NULLAGINO; |
| 3115 | } |
| 3116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | /* |
| 3118 | * xlog_iunlink_recover |
| 3119 | * |
| 3120 | * This is called during recovery to process any inodes which |
| 3121 | * we unlinked but not freed when the system crashed. These |
| 3122 | * inodes will be on the lists in the AGI blocks. What we do |
| 3123 | * here is scan all the AGIs and fully truncate and free any |
| 3124 | * inodes found on the lists. Each inode is removed from the |
| 3125 | * lists when it has been fully truncated and is freed. The |
| 3126 | * freeing of the inode and its removal from the list must be |
| 3127 | * atomic. |
| 3128 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 3129 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | xlog_recover_process_iunlinks( |
| 3131 | xlog_t *log) |
| 3132 | { |
| 3133 | xfs_mount_t *mp; |
| 3134 | xfs_agnumber_t agno; |
| 3135 | xfs_agi_t *agi; |
| 3136 | xfs_buf_t *agibp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3137 | xfs_agino_t agino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3138 | int bucket; |
| 3139 | int error; |
| 3140 | uint mp_dmevmask; |
| 3141 | |
| 3142 | mp = log->l_mp; |
| 3143 | |
| 3144 | /* |
| 3145 | * Prevent any DMAPI event from being sent while in this function. |
| 3146 | */ |
| 3147 | mp_dmevmask = mp->m_dmevmask; |
| 3148 | mp->m_dmevmask = 0; |
| 3149 | |
| 3150 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| 3151 | /* |
| 3152 | * Find the agi for this ag. |
| 3153 | */ |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3154 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
| 3155 | if (error) { |
| 3156 | /* |
| 3157 | * AGI is b0rked. Don't process it. |
| 3158 | * |
| 3159 | * We should probably mark the filesystem as corrupt |
| 3160 | * after we've recovered all the ag's we can.... |
| 3161 | */ |
| 3162 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | } |
| 3164 | agi = XFS_BUF_TO_AGI(agibp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | |
| 3166 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 3167 | agino = be32_to_cpu(agi->agi_unlinked[bucket]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | while (agino != NULLAGINO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3169 | /* |
| 3170 | * Release the agi buffer so that it can |
| 3171 | * be acquired in the normal course of the |
| 3172 | * transaction to truncate and free the inode. |
| 3173 | */ |
| 3174 | xfs_buf_relse(agibp); |
| 3175 | |
Christoph Hellwig | 23fac50 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 3176 | agino = xlog_recover_process_one_iunlink(mp, |
| 3177 | agno, agino, bucket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | |
| 3179 | /* |
| 3180 | * Reacquire the agibuffer and continue around |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3181 | * the loop. This should never fail as we know |
| 3182 | * the buffer was good earlier on. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3183 | */ |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3184 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
| 3185 | ASSERT(error == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | agi = XFS_BUF_TO_AGI(agibp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3187 | } |
| 3188 | } |
| 3189 | |
| 3190 | /* |
| 3191 | * Release the buffer for the current agi so we can |
| 3192 | * go on to the next one. |
| 3193 | */ |
| 3194 | xfs_buf_relse(agibp); |
| 3195 | } |
| 3196 | |
| 3197 | mp->m_dmevmask = mp_dmevmask; |
| 3198 | } |
| 3199 | |
| 3200 | |
| 3201 | #ifdef DEBUG |
| 3202 | STATIC void |
| 3203 | xlog_pack_data_checksum( |
| 3204 | xlog_t *log, |
| 3205 | xlog_in_core_t *iclog, |
| 3206 | int size) |
| 3207 | { |
| 3208 | int i; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3209 | __be32 *up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3210 | uint chksum = 0; |
| 3211 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3212 | up = (__be32 *)iclog->ic_datap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3213 | /* divide length by 4 to get # words */ |
| 3214 | for (i = 0; i < (size >> 2); i++) { |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3215 | chksum ^= be32_to_cpu(*up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | up++; |
| 3217 | } |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3218 | iclog->ic_header.h_chksum = cpu_to_be32(chksum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | } |
| 3220 | #else |
| 3221 | #define xlog_pack_data_checksum(log, iclog, size) |
| 3222 | #endif |
| 3223 | |
| 3224 | /* |
| 3225 | * Stamp cycle number in every block |
| 3226 | */ |
| 3227 | void |
| 3228 | xlog_pack_data( |
| 3229 | xlog_t *log, |
| 3230 | xlog_in_core_t *iclog, |
| 3231 | int roundoff) |
| 3232 | { |
| 3233 | int i, j, k; |
| 3234 | int size = iclog->ic_offset + roundoff; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3235 | __be32 cycle_lsn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3236 | xfs_caddr_t dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | |
| 3238 | xlog_pack_data_checksum(log, iclog, size); |
| 3239 | |
| 3240 | cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); |
| 3241 | |
| 3242 | dp = iclog->ic_datap; |
| 3243 | for (i = 0; i < BTOBB(size) && |
| 3244 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3245 | iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp; |
| 3246 | *(__be32 *)dp = cycle_lsn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3247 | dp += BBSIZE; |
| 3248 | } |
| 3249 | |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3250 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
Christoph Hellwig | b28708d | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 3251 | xlog_in_core_2_t *xhdr = iclog->ic_data; |
| 3252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | for ( ; i < BTOBB(size); i++) { |
| 3254 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| 3255 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3256 | xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp; |
| 3257 | *(__be32 *)dp = cycle_lsn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3258 | dp += BBSIZE; |
| 3259 | } |
| 3260 | |
| 3261 | for (i = 1; i < log->l_iclog_heads; i++) { |
| 3262 | xhdr[i].hic_xheader.xh_cycle = cycle_lsn; |
| 3263 | } |
| 3264 | } |
| 3265 | } |
| 3266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | STATIC void |
| 3268 | xlog_unpack_data( |
| 3269 | xlog_rec_header_t *rhead, |
| 3270 | xfs_caddr_t dp, |
| 3271 | xlog_t *log) |
| 3272 | { |
| 3273 | int i, j, k; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3275 | for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3277 | *(__be32 *)dp = *(__be32 *)&rhead->h_cycle_data[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3278 | dp += BBSIZE; |
| 3279 | } |
| 3280 | |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3281 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
Christoph Hellwig | b28708d | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 3282 | xlog_in_core_2_t *xhdr = (xlog_in_core_2_t *)rhead; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3283 | for ( ; i < BTOBB(be32_to_cpu(rhead->h_len)); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3284 | j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
| 3285 | k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3286 | *(__be32 *)dp = xhdr[j].hic_xheader.xh_cycle_data[k]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | dp += BBSIZE; |
| 3288 | } |
| 3289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3290 | } |
| 3291 | |
| 3292 | STATIC int |
| 3293 | xlog_valid_rec_header( |
| 3294 | xlog_t *log, |
| 3295 | xlog_rec_header_t *rhead, |
| 3296 | xfs_daddr_t blkno) |
| 3297 | { |
| 3298 | int hlen; |
| 3299 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 3300 | if (unlikely(rhead->h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3301 | XFS_ERROR_REPORT("xlog_valid_rec_header(1)", |
| 3302 | XFS_ERRLEVEL_LOW, log->l_mp); |
| 3303 | return XFS_ERROR(EFSCORRUPTED); |
| 3304 | } |
| 3305 | if (unlikely( |
| 3306 | (!rhead->h_version || |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3307 | (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3308 | xfs_warn(log->l_mp, "%s: unrecognised log version (%d).", |
Harvey Harrison | 34a622b | 2008-04-10 12:19:21 +1000 | [diff] [blame] | 3309 | __func__, be32_to_cpu(rhead->h_version)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3310 | return XFS_ERROR(EIO); |
| 3311 | } |
| 3312 | |
| 3313 | /* LR body must have data or it wouldn't have been written */ |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3314 | hlen = be32_to_cpu(rhead->h_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | if (unlikely( hlen <= 0 || hlen > INT_MAX )) { |
| 3316 | XFS_ERROR_REPORT("xlog_valid_rec_header(2)", |
| 3317 | XFS_ERRLEVEL_LOW, log->l_mp); |
| 3318 | return XFS_ERROR(EFSCORRUPTED); |
| 3319 | } |
| 3320 | if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) { |
| 3321 | XFS_ERROR_REPORT("xlog_valid_rec_header(3)", |
| 3322 | XFS_ERRLEVEL_LOW, log->l_mp); |
| 3323 | return XFS_ERROR(EFSCORRUPTED); |
| 3324 | } |
| 3325 | return 0; |
| 3326 | } |
| 3327 | |
| 3328 | /* |
| 3329 | * Read the log from tail to head and process the log records found. |
| 3330 | * Handle the two cases where the tail and head are in the same cycle |
| 3331 | * and where the active portion of the log wraps around the end of |
| 3332 | * the physical log separately. The pass parameter is passed through |
| 3333 | * to the routines called to process the data and is not looked at |
| 3334 | * here. |
| 3335 | */ |
| 3336 | STATIC int |
| 3337 | xlog_do_recovery_pass( |
| 3338 | xlog_t *log, |
| 3339 | xfs_daddr_t head_blk, |
| 3340 | xfs_daddr_t tail_blk, |
| 3341 | int pass) |
| 3342 | { |
| 3343 | xlog_rec_header_t *rhead; |
| 3344 | xfs_daddr_t blk_no; |
Andy Poling | fc5bc4c | 2009-11-03 17:26:47 +0000 | [diff] [blame] | 3345 | xfs_caddr_t offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | xfs_buf_t *hbp, *dbp; |
| 3347 | int error = 0, h_size; |
| 3348 | int bblks, split_bblks; |
| 3349 | int hblks, split_hblks, wrapped_hblks; |
Dave Chinner | f0a7695 | 2010-01-11 11:49:57 +0000 | [diff] [blame] | 3350 | struct hlist_head rhash[XLOG_RHASH_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3351 | |
| 3352 | ASSERT(head_blk != tail_blk); |
| 3353 | |
| 3354 | /* |
| 3355 | * Read the header of the tail block and get the iclog buffer size from |
| 3356 | * h_size. Use this to tell how many sectors make up the log header. |
| 3357 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3358 | if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | /* |
| 3360 | * When using variable length iclogs, read first sector of |
| 3361 | * iclog header and extract the header size from it. Get a |
| 3362 | * new hbp that is the correct size. |
| 3363 | */ |
| 3364 | hbp = xlog_get_bp(log, 1); |
| 3365 | if (!hbp) |
| 3366 | return ENOMEM; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3367 | |
| 3368 | error = xlog_bread(log, tail_blk, 1, hbp, &offset); |
| 3369 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3370 | goto bread_err1; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3372 | rhead = (xlog_rec_header_t *)offset; |
| 3373 | error = xlog_valid_rec_header(log, rhead, tail_blk); |
| 3374 | if (error) |
| 3375 | goto bread_err1; |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3376 | h_size = be32_to_cpu(rhead->h_size); |
| 3377 | if ((be32_to_cpu(rhead->h_version) & XLOG_VERSION_2) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | (h_size > XLOG_HEADER_CYCLE_SIZE)) { |
| 3379 | hblks = h_size / XLOG_HEADER_CYCLE_SIZE; |
| 3380 | if (h_size % XLOG_HEADER_CYCLE_SIZE) |
| 3381 | hblks++; |
| 3382 | xlog_put_bp(hbp); |
| 3383 | hbp = xlog_get_bp(log, hblks); |
| 3384 | } else { |
| 3385 | hblks = 1; |
| 3386 | } |
| 3387 | } else { |
Alex Elder | 69ce58f | 2010-04-20 17:09:59 +1000 | [diff] [blame] | 3388 | ASSERT(log->l_sectBBsize == 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3389 | hblks = 1; |
| 3390 | hbp = xlog_get_bp(log, 1); |
| 3391 | h_size = XLOG_BIG_RECORD_BSIZE; |
| 3392 | } |
| 3393 | |
| 3394 | if (!hbp) |
| 3395 | return ENOMEM; |
| 3396 | dbp = xlog_get_bp(log, BTOBB(h_size)); |
| 3397 | if (!dbp) { |
| 3398 | xlog_put_bp(hbp); |
| 3399 | return ENOMEM; |
| 3400 | } |
| 3401 | |
| 3402 | memset(rhash, 0, sizeof(rhash)); |
| 3403 | if (tail_blk <= head_blk) { |
| 3404 | for (blk_no = tail_blk; blk_no < head_blk; ) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3405 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
| 3406 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3407 | goto bread_err2; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | rhead = (xlog_rec_header_t *)offset; |
| 3410 | error = xlog_valid_rec_header(log, rhead, blk_no); |
| 3411 | if (error) |
| 3412 | goto bread_err2; |
| 3413 | |
| 3414 | /* blocks in data section */ |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3415 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3416 | error = xlog_bread(log, blk_no + hblks, bblks, dbp, |
| 3417 | &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | if (error) |
| 3419 | goto bread_err2; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3421 | xlog_unpack_data(rhead, offset, log); |
| 3422 | if ((error = xlog_recover_process_data(log, |
| 3423 | rhash, rhead, offset, pass))) |
| 3424 | goto bread_err2; |
| 3425 | blk_no += bblks + hblks; |
| 3426 | } |
| 3427 | } else { |
| 3428 | /* |
| 3429 | * Perform recovery around the end of the physical log. |
| 3430 | * When the head is not on the same cycle number as the tail, |
| 3431 | * we can't do a sequential recovery as above. |
| 3432 | */ |
| 3433 | blk_no = tail_blk; |
| 3434 | while (blk_no < log->l_logBBsize) { |
| 3435 | /* |
| 3436 | * Check for header wrapping around physical end-of-log |
| 3437 | */ |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 3438 | offset = hbp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3439 | split_hblks = 0; |
| 3440 | wrapped_hblks = 0; |
| 3441 | if (blk_no + hblks <= log->l_logBBsize) { |
| 3442 | /* Read header in one read */ |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3443 | error = xlog_bread(log, blk_no, hblks, hbp, |
| 3444 | &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | if (error) |
| 3446 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3447 | } else { |
| 3448 | /* This LR is split across physical log end */ |
| 3449 | if (blk_no != log->l_logBBsize) { |
| 3450 | /* some data before physical log end */ |
| 3451 | ASSERT(blk_no <= INT_MAX); |
| 3452 | split_hblks = log->l_logBBsize - (int)blk_no; |
| 3453 | ASSERT(split_hblks > 0); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3454 | error = xlog_bread(log, blk_no, |
| 3455 | split_hblks, hbp, |
| 3456 | &offset); |
| 3457 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | } |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3461 | /* |
| 3462 | * Note: this black magic still works with |
| 3463 | * large sector sizes (non-512) only because: |
| 3464 | * - we increased the buffer size originally |
| 3465 | * by 1 sector giving us enough extra space |
| 3466 | * for the second read; |
| 3467 | * - the log start is guaranteed to be sector |
| 3468 | * aligned; |
| 3469 | * - we read the log end (LR header start) |
| 3470 | * _first_, then the log start (LR header end) |
| 3471 | * - order is important. |
| 3472 | */ |
David Chinner | 234f56a | 2008-04-10 12:24:24 +1000 | [diff] [blame] | 3473 | wrapped_hblks = hblks - split_hblks; |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 3474 | error = xlog_bread_offset(log, 0, |
| 3475 | wrapped_hblks, hbp, |
| 3476 | offset + BBTOB(split_hblks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3477 | if (error) |
| 3478 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3479 | } |
| 3480 | rhead = (xlog_rec_header_t *)offset; |
| 3481 | error = xlog_valid_rec_header(log, rhead, |
| 3482 | split_hblks ? blk_no : 0); |
| 3483 | if (error) |
| 3484 | goto bread_err2; |
| 3485 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3486 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | blk_no += hblks; |
| 3488 | |
| 3489 | /* Read in data for log record */ |
| 3490 | if (blk_no + bblks <= log->l_logBBsize) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3491 | error = xlog_bread(log, blk_no, bblks, dbp, |
| 3492 | &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3493 | if (error) |
| 3494 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3495 | } else { |
| 3496 | /* This log record is split across the |
| 3497 | * physical end of log */ |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 3498 | offset = dbp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3499 | split_bblks = 0; |
| 3500 | if (blk_no != log->l_logBBsize) { |
| 3501 | /* some data is before the physical |
| 3502 | * end of log */ |
| 3503 | ASSERT(!wrapped_hblks); |
| 3504 | ASSERT(blk_no <= INT_MAX); |
| 3505 | split_bblks = |
| 3506 | log->l_logBBsize - (int)blk_no; |
| 3507 | ASSERT(split_bblks > 0); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3508 | error = xlog_bread(log, blk_no, |
| 3509 | split_bblks, dbp, |
| 3510 | &offset); |
| 3511 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3512 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3513 | } |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3515 | /* |
| 3516 | * Note: this black magic still works with |
| 3517 | * large sector sizes (non-512) only because: |
| 3518 | * - we increased the buffer size originally |
| 3519 | * by 1 sector giving us enough extra space |
| 3520 | * for the second read; |
| 3521 | * - the log start is guaranteed to be sector |
| 3522 | * aligned; |
| 3523 | * - we read the log end (LR header start) |
| 3524 | * _first_, then the log start (LR header end) |
| 3525 | * - order is important. |
| 3526 | */ |
Dave Chinner | 4439647 | 2011-04-21 09:34:27 +0000 | [diff] [blame] | 3527 | error = xlog_bread_offset(log, 0, |
| 3528 | bblks - split_bblks, hbp, |
| 3529 | offset + BBTOB(split_bblks)); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3530 | if (error) |
| 3531 | goto bread_err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3532 | } |
| 3533 | xlog_unpack_data(rhead, offset, log); |
| 3534 | if ((error = xlog_recover_process_data(log, rhash, |
| 3535 | rhead, offset, pass))) |
| 3536 | goto bread_err2; |
| 3537 | blk_no += bblks; |
| 3538 | } |
| 3539 | |
| 3540 | ASSERT(blk_no >= log->l_logBBsize); |
| 3541 | blk_no -= log->l_logBBsize; |
| 3542 | |
| 3543 | /* read first part of physical log */ |
| 3544 | while (blk_no < head_blk) { |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3545 | error = xlog_bread(log, blk_no, hblks, hbp, &offset); |
| 3546 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3547 | goto bread_err2; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3549 | rhead = (xlog_rec_header_t *)offset; |
| 3550 | error = xlog_valid_rec_header(log, rhead, blk_no); |
| 3551 | if (error) |
| 3552 | goto bread_err2; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3553 | |
Christoph Hellwig | b53e675 | 2007-10-12 10:59:34 +1000 | [diff] [blame] | 3554 | bblks = (int)BTOBB(be32_to_cpu(rhead->h_len)); |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3555 | error = xlog_bread(log, blk_no+hblks, bblks, dbp, |
| 3556 | &offset); |
| 3557 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | goto bread_err2; |
Christoph Hellwig | 076e6ac | 2009-03-16 08:24:13 +0100 | [diff] [blame] | 3559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3560 | xlog_unpack_data(rhead, offset, log); |
| 3561 | if ((error = xlog_recover_process_data(log, rhash, |
| 3562 | rhead, offset, pass))) |
| 3563 | goto bread_err2; |
| 3564 | blk_no += bblks + hblks; |
| 3565 | } |
| 3566 | } |
| 3567 | |
| 3568 | bread_err2: |
| 3569 | xlog_put_bp(dbp); |
| 3570 | bread_err1: |
| 3571 | xlog_put_bp(hbp); |
| 3572 | return error; |
| 3573 | } |
| 3574 | |
| 3575 | /* |
| 3576 | * Do the recovery of the log. We actually do this in two phases. |
| 3577 | * The two passes are necessary in order to implement the function |
| 3578 | * of cancelling a record written into the log. The first pass |
| 3579 | * determines those things which have been cancelled, and the |
| 3580 | * second pass replays log items normally except for those which |
| 3581 | * have been cancelled. The handling of the replay and cancellations |
| 3582 | * takes place in the log item type specific routines. |
| 3583 | * |
| 3584 | * The table of items which have cancel records in the log is allocated |
| 3585 | * and freed at this level, since only here do we know when all of |
| 3586 | * the log recovery has been completed. |
| 3587 | */ |
| 3588 | STATIC int |
| 3589 | xlog_do_log_recovery( |
| 3590 | xlog_t *log, |
| 3591 | xfs_daddr_t head_blk, |
| 3592 | xfs_daddr_t tail_blk) |
| 3593 | { |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 3594 | int error, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3595 | |
| 3596 | ASSERT(head_blk != tail_blk); |
| 3597 | |
| 3598 | /* |
| 3599 | * First do a pass to find all of the cancelled buf log items. |
| 3600 | * Store them in the buf_cancel_table for use in the second pass. |
| 3601 | */ |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 3602 | log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * |
| 3603 | sizeof(struct list_head), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3604 | KM_SLEEP); |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 3605 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
| 3606 | INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); |
| 3607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
| 3609 | XLOG_RECOVER_PASS1); |
| 3610 | if (error != 0) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3611 | kmem_free(log->l_buf_cancel_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3612 | log->l_buf_cancel_table = NULL; |
| 3613 | return error; |
| 3614 | } |
| 3615 | /* |
| 3616 | * Then do a second pass to actually recover the items in the log. |
| 3617 | * When it is complete free the table of buf cancel items. |
| 3618 | */ |
| 3619 | error = xlog_do_recovery_pass(log, head_blk, tail_blk, |
| 3620 | XLOG_RECOVER_PASS2); |
| 3621 | #ifdef DEBUG |
Tim Shimmin | 6d192a9 | 2006-06-09 14:55:38 +1000 | [diff] [blame] | 3622 | if (!error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | int i; |
| 3624 | |
| 3625 | for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) |
Christoph Hellwig | d5689ea | 2010-12-01 22:06:22 +0000 | [diff] [blame] | 3626 | ASSERT(list_empty(&log->l_buf_cancel_table[i])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3627 | } |
| 3628 | #endif /* DEBUG */ |
| 3629 | |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3630 | kmem_free(log->l_buf_cancel_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3631 | log->l_buf_cancel_table = NULL; |
| 3632 | |
| 3633 | return error; |
| 3634 | } |
| 3635 | |
| 3636 | /* |
| 3637 | * Do the actual recovery |
| 3638 | */ |
| 3639 | STATIC int |
| 3640 | xlog_do_recover( |
| 3641 | xlog_t *log, |
| 3642 | xfs_daddr_t head_blk, |
| 3643 | xfs_daddr_t tail_blk) |
| 3644 | { |
| 3645 | int error; |
| 3646 | xfs_buf_t *bp; |
| 3647 | xfs_sb_t *sbp; |
| 3648 | |
| 3649 | /* |
| 3650 | * First replay the images in the log. |
| 3651 | */ |
| 3652 | error = xlog_do_log_recovery(log, head_blk, tail_blk); |
| 3653 | if (error) { |
| 3654 | return error; |
| 3655 | } |
| 3656 | |
Christoph Hellwig | a9add83 | 2011-10-10 16:52:52 +0000 | [diff] [blame] | 3657 | xfs_flush_buftarg(log->l_mp->m_ddev_targp, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3658 | |
| 3659 | /* |
| 3660 | * If IO errors happened during recovery, bail out. |
| 3661 | */ |
| 3662 | if (XFS_FORCED_SHUTDOWN(log->l_mp)) { |
| 3663 | return (EIO); |
| 3664 | } |
| 3665 | |
| 3666 | /* |
| 3667 | * We now update the tail_lsn since much of the recovery has completed |
| 3668 | * and there may be space available to use. If there were no extent |
| 3669 | * or iunlinks, we can free up the entire log and set the tail_lsn to |
| 3670 | * be the last_sync_lsn. This was set in xlog_find_tail to be the |
| 3671 | * lsn of the last known good LR on disk. If there are extent frees |
| 3672 | * or iunlinks they will have some entries in the AIL; so we look at |
| 3673 | * the AIL to determine how to set the tail_lsn. |
| 3674 | */ |
| 3675 | xlog_assign_tail_lsn(log->l_mp); |
| 3676 | |
| 3677 | /* |
| 3678 | * Now that we've finished replaying all buffer and inode |
| 3679 | * updates, re-read in the superblock. |
| 3680 | */ |
| 3681 | bp = xfs_getsb(log->l_mp, 0); |
| 3682 | XFS_BUF_UNDONE(bp); |
Lachlan McIlroy | bebf963 | 2007-10-15 13:18:02 +1000 | [diff] [blame] | 3683 | ASSERT(!(XFS_BUF_ISWRITE(bp))); |
| 3684 | ASSERT(!(XFS_BUF_ISDELAYWRITE(bp))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3685 | XFS_BUF_READ(bp); |
Lachlan McIlroy | bebf963 | 2007-10-15 13:18:02 +1000 | [diff] [blame] | 3686 | XFS_BUF_UNASYNC(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3687 | xfsbdstrat(log->l_mp, bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 3688 | error = xfs_buf_iowait(bp); |
David Chinner | d64e31a | 2008-04-10 12:22:17 +1000 | [diff] [blame] | 3689 | if (error) { |
Christoph Hellwig | 901796a | 2011-10-10 16:52:49 +0000 | [diff] [blame] | 3690 | xfs_buf_ioerror_alert(bp, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3691 | ASSERT(0); |
| 3692 | xfs_buf_relse(bp); |
| 3693 | return error; |
| 3694 | } |
| 3695 | |
| 3696 | /* Convert superblock from on-disk format */ |
| 3697 | sbp = &log->l_mp->m_sb; |
Chandra Seetharaman | 6bd92a2 | 2012-01-23 17:31:37 +0000 | [diff] [blame] | 3698 | xfs_sb_from_disk(log->l_mp, XFS_BUF_TO_SBP(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3699 | ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3700 | ASSERT(xfs_sb_good_version(sbp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3701 | xfs_buf_relse(bp); |
| 3702 | |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 3703 | /* We've re-read the superblock so re-initialize per-cpu counters */ |
| 3704 | xfs_icsb_reinit_counters(log->l_mp); |
| 3705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3706 | xlog_recover_check_summary(log); |
| 3707 | |
| 3708 | /* Normal transactions can now occur */ |
| 3709 | log->l_flags &= ~XLOG_ACTIVE_RECOVERY; |
| 3710 | return 0; |
| 3711 | } |
| 3712 | |
| 3713 | /* |
| 3714 | * Perform recovery and re-initialize some log variables in xlog_find_tail. |
| 3715 | * |
| 3716 | * Return error or zero. |
| 3717 | */ |
| 3718 | int |
| 3719 | xlog_recover( |
Eric Sandeen | 65be605 | 2006-01-11 15:34:19 +1100 | [diff] [blame] | 3720 | xlog_t *log) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | { |
| 3722 | xfs_daddr_t head_blk, tail_blk; |
| 3723 | int error; |
| 3724 | |
| 3725 | /* find the tail of the log */ |
Eric Sandeen | 65be605 | 2006-01-11 15:34:19 +1100 | [diff] [blame] | 3726 | if ((error = xlog_find_tail(log, &head_blk, &tail_blk))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | return error; |
| 3728 | |
| 3729 | if (tail_blk != head_blk) { |
| 3730 | /* There used to be a comment here: |
| 3731 | * |
| 3732 | * disallow recovery on read-only mounts. note -- mount |
| 3733 | * checks for ENOSPC and turns it into an intelligent |
| 3734 | * error message. |
| 3735 | * ...but this is no longer true. Now, unless you specify |
| 3736 | * NORECOVERY (in which case this function would never be |
| 3737 | * called), we just go ahead and recover. We do this all |
| 3738 | * under the vfs layer, so we can get away with it unless |
| 3739 | * the device itself is read-only, in which case we fail. |
| 3740 | */ |
Utako Kusaka | 3a02ee1 | 2007-05-08 13:50:06 +1000 | [diff] [blame] | 3741 | if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | return error; |
| 3743 | } |
| 3744 | |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3745 | xfs_notice(log->l_mp, "Starting recovery (logdev: %s)", |
| 3746 | log->l_mp->m_logname ? log->l_mp->m_logname |
| 3747 | : "internal"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3748 | |
| 3749 | error = xlog_do_recover(log, head_blk, tail_blk); |
| 3750 | log->l_flags |= XLOG_RECOVERY_NEEDED; |
| 3751 | } |
| 3752 | return error; |
| 3753 | } |
| 3754 | |
| 3755 | /* |
| 3756 | * In the first part of recovery we replay inodes and buffers and build |
| 3757 | * up the list of extent free items which need to be processed. Here |
| 3758 | * we process the extent free items and clean up the on disk unlinked |
| 3759 | * inode lists. This is separated from the first part of recovery so |
| 3760 | * that the root and real-time bitmap inodes can be read in from disk in |
| 3761 | * between the two stages. This is necessary so that we can free space |
| 3762 | * in the real-time portion of the file system. |
| 3763 | */ |
| 3764 | int |
| 3765 | xlog_recover_finish( |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 3766 | xlog_t *log) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3767 | { |
| 3768 | /* |
| 3769 | * Now we're ready to do the transactions needed for the |
| 3770 | * rest of recovery. Start with completing all the extent |
| 3771 | * free intent records and then process the unlinked inode |
| 3772 | * lists. At this point, we essentially run in normal mode |
| 3773 | * except that we're still performing recovery actions |
| 3774 | * rather than accepting new requests. |
| 3775 | */ |
| 3776 | if (log->l_flags & XLOG_RECOVERY_NEEDED) { |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 3777 | int error; |
| 3778 | error = xlog_recover_process_efis(log); |
| 3779 | if (error) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3780 | xfs_alert(log->l_mp, "Failed to recover EFIs"); |
David Chinner | 3c1e2bb | 2008-04-10 12:21:11 +1000 | [diff] [blame] | 3781 | return error; |
| 3782 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3783 | /* |
| 3784 | * Sync the log to get all the EFIs out of the AIL. |
| 3785 | * This isn't absolutely necessary, but it helps in |
| 3786 | * case the unlink transactions would have problems |
| 3787 | * pushing the EFIs out of the way. |
| 3788 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 3789 | xfs_log_force(log->l_mp, XFS_LOG_SYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 3791 | xlog_recover_process_iunlinks(log); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3792 | |
| 3793 | xlog_recover_check_summary(log); |
| 3794 | |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3795 | xfs_notice(log->l_mp, "Ending recovery (logdev: %s)", |
| 3796 | log->l_mp->m_logname ? log->l_mp->m_logname |
| 3797 | : "internal"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | log->l_flags &= ~XLOG_RECOVERY_NEEDED; |
| 3799 | } else { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3800 | xfs_info(log->l_mp, "Ending clean mount"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3801 | } |
| 3802 | return 0; |
| 3803 | } |
| 3804 | |
| 3805 | |
| 3806 | #if defined(DEBUG) |
| 3807 | /* |
| 3808 | * Read all of the agf and agi counters and check that they |
| 3809 | * are consistent with the superblock counters. |
| 3810 | */ |
| 3811 | void |
| 3812 | xlog_recover_check_summary( |
| 3813 | xlog_t *log) |
| 3814 | { |
| 3815 | xfs_mount_t *mp; |
| 3816 | xfs_agf_t *agfp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | xfs_buf_t *agfbp; |
| 3818 | xfs_buf_t *agibp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3819 | xfs_agnumber_t agno; |
| 3820 | __uint64_t freeblks; |
| 3821 | __uint64_t itotal; |
| 3822 | __uint64_t ifree; |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3823 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3824 | |
| 3825 | mp = log->l_mp; |
| 3826 | |
| 3827 | freeblks = 0LL; |
| 3828 | itotal = 0LL; |
| 3829 | ifree = 0LL; |
| 3830 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
From: Christoph Hellwig | 4805621 | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 3831 | error = xfs_read_agf(mp, NULL, agno, 0, &agfbp); |
| 3832 | if (error) { |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3833 | xfs_alert(mp, "%s agf read failed agno %d error %d", |
| 3834 | __func__, agno, error); |
From: Christoph Hellwig | 4805621 | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 3835 | } else { |
| 3836 | agfp = XFS_BUF_TO_AGF(agfbp); |
| 3837 | freeblks += be32_to_cpu(agfp->agf_freeblks) + |
| 3838 | be32_to_cpu(agfp->agf_flcount); |
| 3839 | xfs_buf_relse(agfbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3841 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3842 | error = xfs_read_agi(mp, NULL, agno, &agibp); |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 3843 | if (error) { |
| 3844 | xfs_alert(mp, "%s agi read failed agno %d error %d", |
| 3845 | __func__, agno, error); |
| 3846 | } else { |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3847 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3848 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 3849 | itotal += be32_to_cpu(agi->agi_count); |
| 3850 | ifree += be32_to_cpu(agi->agi_freecount); |
| 3851 | xfs_buf_relse(agibp); |
| 3852 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | } |
| 3855 | #endif /* DEBUG */ |