Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 3 | * Copyright (C) 2010 Red Hat, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 4 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * published by the Free Software Foundation. |
| 9 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 10 | * This program is distributed in the hope that it would be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 20 | #include "xfs_fs.h" |
Dave Chinner | 70a9883 | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 21 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_format.h" |
| 23 | #include "xfs_log_format.h" |
| 24 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 26 | #include "xfs_inode.h" |
Dave Chinner | efc27b5 | 2012-04-29 10:39:43 +0000 | [diff] [blame] | 27 | #include "xfs_extent_busy.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_quota.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 29 | #include "xfs_trans.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 30 | #include "xfs_trans_priv.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 31 | #include "xfs_log.h" |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 32 | #include "xfs_trace.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 33 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Nathan Scott | 8f79405 | 2006-03-14 13:32:41 +1100 | [diff] [blame] | 35 | kmem_zone_t *xfs_trans_zone; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 36 | kmem_zone_t *xfs_log_item_desc_zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Jeff Liu | 4f3b578 | 2013-01-28 21:25:35 +0800 | [diff] [blame] | 38 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | * Initialize the precomputed transaction reservation values |
| 40 | * in the mount structure. |
| 41 | */ |
| 42 | void |
| 43 | xfs_trans_init( |
Christoph Hellwig | 025101d | 2010-05-04 13:53:48 +0000 | [diff] [blame] | 44 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 46 | xfs_trans_resv_calc(mp, M_RES(mp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | /* |
| 50 | * This routine is called to allocate a transaction structure. |
| 51 | * The type parameter indicates the type of the transaction. These |
| 52 | * are enumerated in xfs_trans.h. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 53 | * |
| 54 | * Dynamically allocate the transaction structure from the transaction |
| 55 | * zone, initialize it, and return it to the caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | */ |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 57 | xfs_trans_t * |
| 58 | xfs_trans_alloc( |
| 59 | xfs_mount_t *mp, |
| 60 | uint type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | { |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 62 | xfs_trans_t *tp; |
| 63 | |
| 64 | sb_start_intwrite(mp->m_super); |
| 65 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); |
| 66 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; |
| 67 | return tp; |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | xfs_trans_t * |
| 71 | _xfs_trans_alloc( |
| 72 | xfs_mount_t *mp, |
| 73 | uint type, |
Al Viro | 77ba787 | 2012-04-02 06:24:04 -0400 | [diff] [blame] | 74 | xfs_km_flags_t memflags) |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 75 | { |
| 76 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 78 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
Nathan Scott | 34327e1 | 2006-06-09 17:11:55 +1000 | [diff] [blame] | 79 | atomic_inc(&mp->m_active_trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 81 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
Dave Chinner | 2a3c0ac | 2013-08-12 20:49:28 +1000 | [diff] [blame] | 82 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | tp->t_type = type; |
| 84 | tp->t_mountp = mp; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 85 | INIT_LIST_HEAD(&tp->t_items); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 86 | INIT_LIST_HEAD(&tp->t_busy); |
Nathan Scott | 34327e1 | 2006-06-09 17:11:55 +1000 | [diff] [blame] | 87 | return tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | /* |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 91 | * Free the transaction structure. If there is more clean up |
| 92 | * to do when the structure is freed, add it here. |
| 93 | */ |
| 94 | STATIC void |
| 95 | xfs_trans_free( |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 96 | struct xfs_trans *tp) |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 97 | { |
Dave Chinner | 4ecbfe6 | 2012-04-29 10:41:10 +0000 | [diff] [blame] | 98 | xfs_extent_busy_sort(&tp->t_busy); |
| 99 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 100 | |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 101 | atomic_dec(&tp->t_mountp->m_active_trans); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 102 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
| 103 | sb_end_intwrite(tp->t_mountp->m_super); |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 104 | xfs_trans_free_dqinfo(tp); |
| 105 | kmem_zone_free(xfs_trans_zone, tp); |
| 106 | } |
| 107 | |
| 108 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | * This is called to create a new transaction which will share the |
| 110 | * permanent log reservation of the given transaction. The remaining |
| 111 | * unused block and rt extent reservations are also inherited. This |
| 112 | * implies that the original transaction is no longer allowed to allocate |
| 113 | * blocks. Locks and log items, however, are no inherited. They must |
| 114 | * be added to the new transaction explicitly. |
| 115 | */ |
| 116 | xfs_trans_t * |
| 117 | xfs_trans_dup( |
| 118 | xfs_trans_t *tp) |
| 119 | { |
| 120 | xfs_trans_t *ntp; |
| 121 | |
| 122 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); |
| 123 | |
| 124 | /* |
| 125 | * Initialize the new transaction structure. |
| 126 | */ |
Dave Chinner | 2a3c0ac | 2013-08-12 20:49:28 +1000 | [diff] [blame] | 127 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | ntp->t_type = tp->t_type; |
| 129 | ntp->t_mountp = tp->t_mountp; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 130 | INIT_LIST_HEAD(&ntp->t_items); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 131 | INIT_LIST_HEAD(&ntp->t_busy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
| 133 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | ASSERT(tp->t_ticket != NULL); |
Nathan Scott | cfcbbbd | 2005-11-02 15:12:04 +1100 | [diff] [blame] | 135 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 136 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
| 137 | (tp->t_flags & XFS_TRANS_RESERVE) | |
| 138 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); |
| 139 | /* We gave our writer reference to the new transaction */ |
| 140 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 141 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
| 143 | tp->t_blk_res = tp->t_blk_res_used; |
| 144 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; |
| 145 | tp->t_rtx_res = tp->t_rtx_res_used; |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 146 | ntp->t_pflags = tp->t_pflags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 148 | xfs_trans_dup_dqinfo(tp, ntp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | atomic_inc(&tp->t_mountp->m_active_trans); |
| 151 | return ntp; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * This is called to reserve free disk blocks and log space for the |
| 156 | * given transaction. This must be done before allocating any resources |
| 157 | * within the transaction. |
| 158 | * |
| 159 | * This will return ENOSPC if there are not enough blocks available. |
| 160 | * It will sleep waiting for available log space. |
| 161 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which |
| 162 | * is used by long running transactions. If any one of the reservations |
| 163 | * fails then they will all be backed out. |
| 164 | * |
| 165 | * This does not do quota reservations. That typically is done by the |
| 166 | * caller afterwards. |
| 167 | */ |
| 168 | int |
| 169 | xfs_trans_reserve( |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 170 | struct xfs_trans *tp, |
| 171 | struct xfs_trans_res *resp, |
| 172 | uint blocks, |
| 173 | uint rtextents) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | { |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 175 | int error = 0; |
| 176 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /* Mark this thread as being in a transaction */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 179 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | /* |
| 182 | * Attempt to reserve the needed disk blocks by decrementing |
| 183 | * the number needed from the number available. This will |
| 184 | * fail if the count would go below zero. |
| 185 | */ |
| 186 | if (blocks > 0) { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 187 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 188 | -((int64_t)blocks), rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | if (error != 0) { |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 190 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 191 | return -ENOSPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | tp->t_blk_res += blocks; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * Reserve the log space needed for this transaction. |
| 198 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 199 | if (resp->tr_logres > 0) { |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 200 | bool permanent = false; |
| 201 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 202 | ASSERT(tp->t_log_res == 0 || |
| 203 | tp->t_log_res == resp->tr_logres); |
| 204 | ASSERT(tp->t_log_count == 0 || |
| 205 | tp->t_log_count == resp->tr_logcount); |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 206 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 207 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 209 | permanent = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } else { |
| 211 | ASSERT(tp->t_ticket == NULL); |
| 212 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 215 | if (tp->t_ticket != NULL) { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 216 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 217 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
| 218 | } else { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 219 | error = xfs_log_reserve(tp->t_mountp, |
| 220 | resp->tr_logres, |
| 221 | resp->tr_logcount, |
| 222 | &tp->t_ticket, XFS_TRANSACTION, |
| 223 | permanent, tp->t_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 225 | |
| 226 | if (error) |
| 227 | goto undo_blocks; |
| 228 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 229 | tp->t_log_res = resp->tr_logres; |
| 230 | tp->t_log_count = resp->tr_logcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Attempt to reserve the needed realtime extents by decrementing |
| 235 | * the number needed from the number available. This will |
| 236 | * fail if the count would go below zero. |
| 237 | */ |
| 238 | if (rtextents > 0) { |
| 239 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 240 | -((int64_t)rtextents), rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (error) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 242 | error = -ENOSPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | goto undo_log; |
| 244 | } |
| 245 | tp->t_rtx_res += rtextents; |
| 246 | } |
| 247 | |
| 248 | return 0; |
| 249 | |
| 250 | /* |
| 251 | * Error cases jump to one of these labels to undo any |
| 252 | * reservations which have already been performed. |
| 253 | */ |
| 254 | undo_log: |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 255 | if (resp->tr_logres > 0) { |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 256 | int log_flags; |
| 257 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 258 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 260 | } else { |
| 261 | log_flags = 0; |
| 262 | } |
| 263 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); |
| 264 | tp->t_ticket = NULL; |
| 265 | tp->t_log_res = 0; |
| 266 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; |
| 267 | } |
| 268 | |
| 269 | undo_blocks: |
| 270 | if (blocks > 0) { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 271 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 272 | (int64_t)blocks, rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | tp->t_blk_res = 0; |
| 274 | } |
| 275 | |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 276 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 278 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | * Record the indicated change to the given field for application |
| 283 | * to the file system's superblock when the transaction commits. |
| 284 | * For now, just store the change in the transaction structure. |
| 285 | * |
| 286 | * Mark the transaction structure to indicate that the superblock |
| 287 | * needs to be updated before committing. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 288 | * |
| 289 | * Because we may not be keeping track of allocated/free inodes and |
| 290 | * used filesystem blocks in the superblock, we do not mark the |
| 291 | * superblock dirty in this transaction if we modify these fields. |
| 292 | * We still need to update the transaction deltas so that they get |
| 293 | * applied to the incore superblock, but we don't want them to |
| 294 | * cause the superblock to get locked and logged if these are the |
| 295 | * only fields in the superblock that the transaction modifies. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | */ |
| 297 | void |
| 298 | xfs_trans_mod_sb( |
| 299 | xfs_trans_t *tp, |
| 300 | uint field, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 301 | int64_t delta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 303 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
| 304 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | switch (field) { |
| 307 | case XFS_TRANS_SB_ICOUNT: |
| 308 | tp->t_icount_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 309 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 310 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | break; |
| 312 | case XFS_TRANS_SB_IFREE: |
| 313 | tp->t_ifree_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 314 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 315 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | break; |
| 317 | case XFS_TRANS_SB_FDBLOCKS: |
| 318 | /* |
| 319 | * Track the number of blocks allocated in the |
| 320 | * transaction. Make sure it does not exceed the |
| 321 | * number reserved. |
| 322 | */ |
| 323 | if (delta < 0) { |
| 324 | tp->t_blk_res_used += (uint)-delta; |
| 325 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); |
| 326 | } |
| 327 | tp->t_fdblocks_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 328 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 329 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | break; |
| 331 | case XFS_TRANS_SB_RES_FDBLOCKS: |
| 332 | /* |
| 333 | * The allocation has already been applied to the |
| 334 | * in-core superblock's counter. This should only |
| 335 | * be applied to the on-disk superblock. |
| 336 | */ |
| 337 | ASSERT(delta < 0); |
| 338 | tp->t_res_fdblocks_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 339 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 340 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | break; |
| 342 | case XFS_TRANS_SB_FREXTENTS: |
| 343 | /* |
| 344 | * Track the number of blocks allocated in the |
| 345 | * transaction. Make sure it does not exceed the |
| 346 | * number reserved. |
| 347 | */ |
| 348 | if (delta < 0) { |
| 349 | tp->t_rtx_res_used += (uint)-delta; |
| 350 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); |
| 351 | } |
| 352 | tp->t_frextents_delta += delta; |
| 353 | break; |
| 354 | case XFS_TRANS_SB_RES_FREXTENTS: |
| 355 | /* |
| 356 | * The allocation has already been applied to the |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 357 | * in-core superblock's counter. This should only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | * be applied to the on-disk superblock. |
| 359 | */ |
| 360 | ASSERT(delta < 0); |
| 361 | tp->t_res_frextents_delta += delta; |
| 362 | break; |
| 363 | case XFS_TRANS_SB_DBLOCKS: |
| 364 | ASSERT(delta > 0); |
| 365 | tp->t_dblocks_delta += delta; |
| 366 | break; |
| 367 | case XFS_TRANS_SB_AGCOUNT: |
| 368 | ASSERT(delta > 0); |
| 369 | tp->t_agcount_delta += delta; |
| 370 | break; |
| 371 | case XFS_TRANS_SB_IMAXPCT: |
| 372 | tp->t_imaxpct_delta += delta; |
| 373 | break; |
| 374 | case XFS_TRANS_SB_REXTSIZE: |
| 375 | tp->t_rextsize_delta += delta; |
| 376 | break; |
| 377 | case XFS_TRANS_SB_RBMBLOCKS: |
| 378 | tp->t_rbmblocks_delta += delta; |
| 379 | break; |
| 380 | case XFS_TRANS_SB_RBLOCKS: |
| 381 | tp->t_rblocks_delta += delta; |
| 382 | break; |
| 383 | case XFS_TRANS_SB_REXTENTS: |
| 384 | tp->t_rextents_delta += delta; |
| 385 | break; |
| 386 | case XFS_TRANS_SB_REXTSLOG: |
| 387 | tp->t_rextslog_delta += delta; |
| 388 | break; |
| 389 | default: |
| 390 | ASSERT(0); |
| 391 | return; |
| 392 | } |
| 393 | |
David Chinner | 210c6f1 | 2007-05-24 15:26:51 +1000 | [diff] [blame] | 394 | tp->t_flags |= flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | /* |
| 398 | * xfs_trans_apply_sb_deltas() is called from the commit code |
| 399 | * to bring the superblock buffer into the current transaction |
| 400 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). |
| 401 | * |
| 402 | * For now we just look at each field allowed to change and change |
| 403 | * it if necessary. |
| 404 | */ |
| 405 | STATIC void |
| 406 | xfs_trans_apply_sb_deltas( |
| 407 | xfs_trans_t *tp) |
| 408 | { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 409 | xfs_dsb_t *sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | xfs_buf_t *bp; |
| 411 | int whole = 0; |
| 412 | |
| 413 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); |
| 414 | sbp = XFS_BUF_TO_SBP(bp); |
| 415 | |
| 416 | /* |
| 417 | * Check that superblock mods match the mods made to AGF counters. |
| 418 | */ |
| 419 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == |
| 420 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + |
| 421 | tp->t_ag_btree_delta)); |
| 422 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 423 | /* |
| 424 | * Only update the superblock counters if we are logging them |
| 425 | */ |
| 426 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 427 | if (tp->t_icount_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 428 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 429 | if (tp->t_ifree_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 430 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 431 | if (tp->t_fdblocks_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 432 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 433 | if (tp->t_res_fdblocks_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 434 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | } |
| 436 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 437 | if (tp->t_frextents_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 438 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 439 | if (tp->t_res_frextents_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 440 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 441 | |
| 442 | if (tp->t_dblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 443 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | whole = 1; |
| 445 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 446 | if (tp->t_agcount_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 447 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | whole = 1; |
| 449 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 450 | if (tp->t_imaxpct_delta) { |
| 451 | sbp->sb_imax_pct += tp->t_imaxpct_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | whole = 1; |
| 453 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 454 | if (tp->t_rextsize_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 455 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | whole = 1; |
| 457 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 458 | if (tp->t_rbmblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 459 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | whole = 1; |
| 461 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 462 | if (tp->t_rblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 463 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | whole = 1; |
| 465 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 466 | if (tp->t_rextents_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 467 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | whole = 1; |
| 469 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 470 | if (tp->t_rextslog_delta) { |
| 471 | sbp->sb_rextslog += tp->t_rextslog_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | whole = 1; |
| 473 | } |
| 474 | |
Dave Chinner | 3443a3b | 2015-01-22 09:30:23 +1100 | [diff] [blame] | 475 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | if (whole) |
| 477 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 478 | * Log the whole thing, the fields are noncontiguous. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | */ |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 480 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | else |
| 482 | /* |
| 483 | * Since all the modifiable fields are contiguous, we |
| 484 | * can get away with this. |
| 485 | */ |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 486 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
| 487 | offsetof(xfs_dsb_t, sb_frextents) + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | sizeof(sbp->sb_frextents) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /* |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 492 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
| 493 | * and apply superblock counter changes to the in-core superblock. The |
| 494 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT |
| 495 | * applied to the in-core superblock. The idea is that that has already been |
| 496 | * done. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | * |
| 498 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 499 | * However, we have to ensure that we only modify each superblock field only |
| 500 | * once because the application of the delta values may not be atomic. That can |
| 501 | * lead to ENOSPC races occurring if we have two separate modifcations of the |
| 502 | * free space counter to put back the entire reservation and then take away |
| 503 | * what we used. |
| 504 | * |
| 505 | * If we are not logging superblock counters, then the inode allocated/free and |
| 506 | * used block counts are not updated in the on disk superblock. In this case, |
| 507 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we |
| 508 | * still need to update the incore superblock with the changes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | */ |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 510 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | xfs_trans_unreserve_and_mod_sb( |
| 512 | xfs_trans_t *tp) |
| 513 | { |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 514 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | xfs_mod_sb_t *msbp; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 516 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | /* REFERENCED */ |
| 518 | int error; |
| 519 | int rsvd; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 520 | int64_t blkdelta = 0; |
| 521 | int64_t rtxdelta = 0; |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 522 | int64_t idelta = 0; |
| 523 | int64_t ifreedelta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | msbp = msb; |
| 526 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
| 527 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 528 | /* calculate deltas */ |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 529 | if (tp->t_blk_res > 0) |
| 530 | blkdelta = tp->t_blk_res; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 531 | if ((tp->t_fdblocks_delta != 0) && |
| 532 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
| 533 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) |
| 534 | blkdelta += tp->t_fdblocks_delta; |
| 535 | |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 536 | if (tp->t_rtx_res > 0) |
| 537 | rtxdelta = tp->t_rtx_res; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 538 | if ((tp->t_frextents_delta != 0) && |
| 539 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) |
| 540 | rtxdelta += tp->t_frextents_delta; |
| 541 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 542 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
| 543 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { |
| 544 | idelta = tp->t_icount_delta; |
| 545 | ifreedelta = tp->t_ifree_delta; |
| 546 | } |
| 547 | |
| 548 | /* apply the per-cpu counters */ |
| 549 | if (blkdelta) { |
| 550 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
| 551 | blkdelta, rsvd); |
| 552 | if (error) |
| 553 | goto out; |
| 554 | } |
| 555 | |
| 556 | if (idelta) { |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 557 | error = xfs_mod_icount(mp, idelta); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 558 | if (error) |
| 559 | goto out_undo_fdblocks; |
| 560 | } |
| 561 | |
| 562 | if (ifreedelta) { |
Dave Chinner | e88b64e | 2015-02-23 21:19:53 +1100 | [diff] [blame^] | 563 | error = xfs_mod_ifree(mp, ifreedelta); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 564 | if (error) |
| 565 | goto out_undo_icount; |
| 566 | } |
| 567 | |
| 568 | /* apply remaining deltas */ |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 569 | if (rtxdelta != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | msbp->msb_field = XFS_SBS_FREXTENTS; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 571 | msbp->msb_delta = rtxdelta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | msbp++; |
| 573 | } |
| 574 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 575 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | if (tp->t_dblocks_delta != 0) { |
| 577 | msbp->msb_field = XFS_SBS_DBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 578 | msbp->msb_delta = tp->t_dblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | msbp++; |
| 580 | } |
| 581 | if (tp->t_agcount_delta != 0) { |
| 582 | msbp->msb_field = XFS_SBS_AGCOUNT; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 583 | msbp->msb_delta = tp->t_agcount_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | msbp++; |
| 585 | } |
| 586 | if (tp->t_imaxpct_delta != 0) { |
| 587 | msbp->msb_field = XFS_SBS_IMAX_PCT; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 588 | msbp->msb_delta = tp->t_imaxpct_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | msbp++; |
| 590 | } |
| 591 | if (tp->t_rextsize_delta != 0) { |
| 592 | msbp->msb_field = XFS_SBS_REXTSIZE; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 593 | msbp->msb_delta = tp->t_rextsize_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | msbp++; |
| 595 | } |
| 596 | if (tp->t_rbmblocks_delta != 0) { |
| 597 | msbp->msb_field = XFS_SBS_RBMBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 598 | msbp->msb_delta = tp->t_rbmblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | msbp++; |
| 600 | } |
| 601 | if (tp->t_rblocks_delta != 0) { |
| 602 | msbp->msb_field = XFS_SBS_RBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 603 | msbp->msb_delta = tp->t_rblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | msbp++; |
| 605 | } |
| 606 | if (tp->t_rextents_delta != 0) { |
| 607 | msbp->msb_field = XFS_SBS_REXTENTS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 608 | msbp->msb_delta = tp->t_rextents_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | msbp++; |
| 610 | } |
| 611 | if (tp->t_rextslog_delta != 0) { |
| 612 | msbp->msb_field = XFS_SBS_REXTSLOG; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 613 | msbp->msb_delta = tp->t_rextslog_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | msbp++; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | /* |
| 619 | * If we need to change anything, do it. |
| 620 | */ |
| 621 | if (msbp > msb) { |
| 622 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, |
| 623 | (uint)(msbp - msb), rsvd); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 624 | if (error) |
| 625 | goto out_undo_ifreecount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 627 | |
| 628 | return; |
| 629 | |
| 630 | out_undo_ifreecount: |
| 631 | if (ifreedelta) |
Dave Chinner | e88b64e | 2015-02-23 21:19:53 +1100 | [diff] [blame^] | 632 | xfs_mod_ifree(mp, -ifreedelta); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 633 | out_undo_icount: |
| 634 | if (idelta) |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 635 | xfs_mod_icount(mp, -idelta); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 636 | out_undo_fdblocks: |
| 637 | if (blkdelta) |
| 638 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); |
| 639 | out: |
Jesper Juhl | 1884bd8 | 2010-12-25 20:14:53 +0000 | [diff] [blame] | 640 | ASSERT(error == 0); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 641 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 644 | /* |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 645 | * Add the given log item to the transaction's list of log items. |
| 646 | * |
| 647 | * The log item will now point to its new descriptor with its li_desc field. |
| 648 | */ |
| 649 | void |
| 650 | xfs_trans_add_item( |
| 651 | struct xfs_trans *tp, |
| 652 | struct xfs_log_item *lip) |
| 653 | { |
| 654 | struct xfs_log_item_desc *lidp; |
| 655 | |
Jesper Juhl | f65020a | 2012-02-13 20:51:05 +0000 | [diff] [blame] | 656 | ASSERT(lip->li_mountp == tp->t_mountp); |
| 657 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 658 | |
Dave Chinner | 4386970 | 2010-07-20 17:53:44 +1000 | [diff] [blame] | 659 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 660 | |
| 661 | lidp->lid_item = lip; |
| 662 | lidp->lid_flags = 0; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 663 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
| 664 | |
| 665 | lip->li_desc = lidp; |
| 666 | } |
| 667 | |
| 668 | STATIC void |
| 669 | xfs_trans_free_item_desc( |
| 670 | struct xfs_log_item_desc *lidp) |
| 671 | { |
| 672 | list_del_init(&lidp->lid_trans); |
| 673 | kmem_zone_free(xfs_log_item_desc_zone, lidp); |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * Unlink and free the given descriptor. |
| 678 | */ |
| 679 | void |
| 680 | xfs_trans_del_item( |
| 681 | struct xfs_log_item *lip) |
| 682 | { |
| 683 | xfs_trans_free_item_desc(lip->li_desc); |
| 684 | lip->li_desc = NULL; |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * Unlock all of the items of a transaction and free all the descriptors |
| 689 | * of that transaction. |
| 690 | */ |
Dave Chinner | d17c701 | 2010-08-24 11:42:52 +1000 | [diff] [blame] | 691 | void |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 692 | xfs_trans_free_items( |
| 693 | struct xfs_trans *tp, |
| 694 | xfs_lsn_t commit_lsn, |
| 695 | int flags) |
| 696 | { |
| 697 | struct xfs_log_item_desc *lidp, *next; |
| 698 | |
| 699 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { |
| 700 | struct xfs_log_item *lip = lidp->lid_item; |
| 701 | |
| 702 | lip->li_desc = NULL; |
| 703 | |
| 704 | if (commit_lsn != NULLCOMMITLSN) |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 705 | lip->li_ops->iop_committing(lip, commit_lsn); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 706 | if (flags & XFS_TRANS_ABORT) |
| 707 | lip->li_flags |= XFS_LI_ABORTED; |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 708 | lip->li_ops->iop_unlock(lip); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 709 | |
| 710 | xfs_trans_free_item_desc(lidp); |
| 711 | } |
| 712 | } |
| 713 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 714 | static inline void |
| 715 | xfs_log_item_batch_insert( |
| 716 | struct xfs_ail *ailp, |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 717 | struct xfs_ail_cursor *cur, |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 718 | struct xfs_log_item **log_items, |
| 719 | int nr_items, |
| 720 | xfs_lsn_t commit_lsn) |
| 721 | { |
| 722 | int i; |
| 723 | |
| 724 | spin_lock(&ailp->xa_lock); |
| 725 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 726 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 727 | |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 728 | for (i = 0; i < nr_items; i++) { |
| 729 | struct xfs_log_item *lip = log_items[i]; |
| 730 | |
| 731 | lip->li_ops->iop_unpin(lip, 0); |
| 732 | } |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | /* |
| 736 | * Bulk operation version of xfs_trans_committed that takes a log vector of |
| 737 | * items to insert into the AIL. This uses bulk AIL insertion techniques to |
| 738 | * minimise lock traffic. |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 739 | * |
| 740 | * If we are called with the aborted flag set, it is because a log write during |
| 741 | * a CIL checkpoint commit has failed. In this case, all the items in the |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 742 | * checkpoint have already gone through iop_commited and iop_unlock, which |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 743 | * means that checkpoint commit abort handling is treated exactly the same |
| 744 | * as an iclog write error even though we haven't started any IO yet. Hence in |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 745 | * this case all we need to do is iop_committed processing, followed by an |
| 746 | * iop_unpin(aborted) call. |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 747 | * |
| 748 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not |
| 749 | * at the end of the AIL, the insert cursor avoids the need to walk |
| 750 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() |
| 751 | * call. This saves a lot of needless list walking and is a net win, even |
| 752 | * though it slightly increases that amount of AIL lock traffic to set it up |
| 753 | * and tear it down. |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 754 | */ |
| 755 | void |
| 756 | xfs_trans_committed_bulk( |
| 757 | struct xfs_ail *ailp, |
| 758 | struct xfs_log_vec *log_vector, |
| 759 | xfs_lsn_t commit_lsn, |
| 760 | int aborted) |
| 761 | { |
| 762 | #define LOG_ITEM_BATCH_SIZE 32 |
| 763 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; |
| 764 | struct xfs_log_vec *lv; |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 765 | struct xfs_ail_cursor cur; |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 766 | int i = 0; |
| 767 | |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 768 | spin_lock(&ailp->xa_lock); |
| 769 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); |
| 770 | spin_unlock(&ailp->xa_lock); |
| 771 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 772 | /* unpin all the log items */ |
| 773 | for (lv = log_vector; lv; lv = lv->lv_next ) { |
| 774 | struct xfs_log_item *lip = lv->lv_item; |
| 775 | xfs_lsn_t item_lsn; |
| 776 | |
| 777 | if (aborted) |
| 778 | lip->li_flags |= XFS_LI_ABORTED; |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 779 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 780 | |
Dave Chinner | 1316d4d | 2011-07-04 05:27:36 +0000 | [diff] [blame] | 781 | /* item_lsn of -1 means the item needs no further processing */ |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 782 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
| 783 | continue; |
| 784 | |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 785 | /* |
| 786 | * if we are aborting the operation, no point in inserting the |
| 787 | * object into the AIL as we are in a shutdown situation. |
| 788 | */ |
| 789 | if (aborted) { |
| 790 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 791 | lip->li_ops->iop_unpin(lip, 1); |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 792 | continue; |
| 793 | } |
| 794 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 795 | if (item_lsn != commit_lsn) { |
| 796 | |
| 797 | /* |
| 798 | * Not a bulk update option due to unusual item_lsn. |
| 799 | * Push into AIL immediately, rechecking the lsn once |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 800 | * we have the ail lock. Then unpin the item. This does |
| 801 | * not affect the AIL cursor the bulk insert path is |
| 802 | * using. |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 803 | */ |
| 804 | spin_lock(&ailp->xa_lock); |
| 805 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) |
| 806 | xfs_trans_ail_update(ailp, lip, item_lsn); |
| 807 | else |
| 808 | spin_unlock(&ailp->xa_lock); |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 809 | lip->li_ops->iop_unpin(lip, 0); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 810 | continue; |
| 811 | } |
| 812 | |
| 813 | /* Item is a candidate for bulk AIL insert. */ |
| 814 | log_items[i++] = lv->lv_item; |
| 815 | if (i >= LOG_ITEM_BATCH_SIZE) { |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 816 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 817 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
| 818 | i = 0; |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | /* make sure we insert the remainder! */ |
| 823 | if (i) |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 824 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
| 825 | |
| 826 | spin_lock(&ailp->xa_lock); |
Eric Sandeen | e4a1e29 | 2014-04-14 19:06:05 +1000 | [diff] [blame] | 827 | xfs_trans_ail_cursor_done(&cur); |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 828 | spin_unlock(&ailp->xa_lock); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 829 | } |
| 830 | |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 831 | /* |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 832 | * Commit the given transaction to the log. |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 833 | * |
| 834 | * XFS disk error handling mechanism is not based on a typical |
| 835 | * transaction abort mechanism. Logically after the filesystem |
| 836 | * gets marked 'SHUTDOWN', we can't let any new transactions |
| 837 | * be durable - ie. committed to disk - because some metadata might |
| 838 | * be inconsistent. In such cases, this returns an error, and the |
| 839 | * caller may assume that all locked objects joined to the transaction |
| 840 | * have already been unlocked as if the commit had succeeded. |
| 841 | * Do not reference the transaction structure after this call. |
| 842 | */ |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 843 | int |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 844 | xfs_trans_commit( |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 845 | struct xfs_trans *tp, |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 846 | uint flags) |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 847 | { |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 848 | struct xfs_mount *mp = tp->t_mountp; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 849 | xfs_lsn_t commit_lsn = -1; |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 850 | int error = 0; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 851 | int log_flags = 0; |
| 852 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 853 | |
| 854 | /* |
| 855 | * Determine whether this commit is releasing a permanent |
| 856 | * log reservation or not. |
| 857 | */ |
| 858 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { |
| 859 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 860 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 861 | } |
| 862 | |
| 863 | /* |
| 864 | * If there is nothing to be logged by the transaction, |
| 865 | * then unlock all of the items associated with the |
| 866 | * transaction and free the transaction structure. |
| 867 | * Also make sure to return any reserved blocks to |
| 868 | * the free pool. |
| 869 | */ |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 870 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
| 871 | goto out_unreserve; |
| 872 | |
| 873 | if (XFS_FORCED_SHUTDOWN(mp)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 874 | error = -EIO; |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 875 | goto out_unreserve; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 876 | } |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 877 | |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 878 | ASSERT(tp->t_ticket != NULL); |
| 879 | |
| 880 | /* |
| 881 | * If we need to update the superblock, then do it now. |
| 882 | */ |
| 883 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) |
| 884 | xfs_trans_apply_sb_deltas(tp); |
| 885 | xfs_trans_apply_dquot_deltas(tp); |
| 886 | |
Jie Liu | c6f9726 | 2014-02-07 15:26:07 +1100 | [diff] [blame] | 887 | xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
Christoph Hellwig | 0244b96 | 2011-12-06 21:58:08 +0000 | [diff] [blame] | 889 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
| 890 | xfs_trans_free(tp); |
| 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | /* |
| 893 | * If the transaction needs to be synchronous, then force the |
| 894 | * log out now and wait for it. |
| 895 | */ |
| 896 | if (sync) { |
Jie Liu | c6f9726 | 2014-02-07 15:26:07 +1100 | [diff] [blame] | 897 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | XFS_STATS_INC(xs_trans_sync); |
| 899 | } else { |
| 900 | XFS_STATS_INC(xs_trans_async); |
| 901 | } |
| 902 | |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 903 | return error; |
| 904 | |
| 905 | out_unreserve: |
| 906 | xfs_trans_unreserve_and_mod_sb(tp); |
| 907 | |
| 908 | /* |
| 909 | * It is indeed possible for the transaction to be not dirty but |
| 910 | * the dqinfo portion to be. All that means is that we have some |
| 911 | * (non-persistent) quota reservations that need to be unreserved. |
| 912 | */ |
| 913 | xfs_trans_unreserve_and_mod_dquots(tp); |
| 914 | if (tp->t_ticket) { |
| 915 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
| 916 | if (commit_lsn == -1 && !error) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 917 | error = -EIO; |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 918 | } |
| 919 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 920 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 921 | xfs_trans_free(tp); |
| 922 | |
| 923 | XFS_STATS_INC(xs_trans_empty); |
| 924 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | } |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | * Unlock all of the transaction's items and free the transaction. |
| 929 | * The transaction must not have modified any of its items, because |
| 930 | * there is no way to restore them to their previous state. |
| 931 | * |
| 932 | * If the transaction has made a log reservation, make sure to release |
| 933 | * it as well. |
| 934 | */ |
| 935 | void |
| 936 | xfs_trans_cancel( |
| 937 | xfs_trans_t *tp, |
| 938 | int flags) |
| 939 | { |
| 940 | int log_flags; |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 941 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | /* |
| 944 | * See if the caller is being too lazy to figure out if |
| 945 | * the transaction really needs an abort. |
| 946 | */ |
| 947 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) |
| 948 | flags &= ~XFS_TRANS_ABORT; |
| 949 | /* |
| 950 | * See if the caller is relying on us to shut down the |
| 951 | * filesystem. This happens in paths where we detect |
| 952 | * corruption and decide to give up. |
| 953 | */ |
Nathan Scott | 60a204f | 2006-01-11 15:37:00 +1100 | [diff] [blame] | 954 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 955 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 956 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
Nathan Scott | 60a204f | 2006-01-11 15:37:00 +1100 | [diff] [blame] | 957 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | #ifdef DEBUG |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 959 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
| 960 | struct xfs_log_item_desc *lidp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 962 | list_for_each_entry(lidp, &tp->t_items, lid_trans) |
| 963 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | #endif |
| 966 | xfs_trans_unreserve_and_mod_sb(tp); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 967 | xfs_trans_unreserve_and_mod_dquots(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
| 969 | if (tp->t_ticket) { |
| 970 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { |
| 971 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 972 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 973 | } else { |
| 974 | log_flags = 0; |
| 975 | } |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 976 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | /* mark this thread as no longer being in a transaction */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 980 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 982 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | xfs_trans_free(tp); |
| 984 | } |
| 985 | |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 986 | /* |
| 987 | * Roll from one trans in the sequence of PERMANENT transactions to |
| 988 | * the next: permanent transactions are only flushed out when |
| 989 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon |
| 990 | * as possible to let chunks of it go to the log. So we commit the |
| 991 | * chunk we've been working on and get a new transaction to continue. |
| 992 | */ |
| 993 | int |
| 994 | xfs_trans_roll( |
| 995 | struct xfs_trans **tpp, |
| 996 | struct xfs_inode *dp) |
| 997 | { |
| 998 | struct xfs_trans *trans; |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 999 | struct xfs_trans_res tres; |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1000 | int error; |
| 1001 | |
| 1002 | /* |
| 1003 | * Ensure that the inode is always logged. |
| 1004 | */ |
| 1005 | trans = *tpp; |
| 1006 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); |
| 1007 | |
| 1008 | /* |
| 1009 | * Copy the critical parameters from one trans to the next. |
| 1010 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1011 | tres.tr_logres = trans->t_log_res; |
| 1012 | tres.tr_logcount = trans->t_log_count; |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1013 | *tpp = xfs_trans_dup(trans); |
| 1014 | |
| 1015 | /* |
| 1016 | * Commit the current transaction. |
| 1017 | * If this commit failed, then it'd just unlock those items that |
| 1018 | * are not marked ihold. That also means that a filesystem shutdown |
| 1019 | * is in progress. The caller takes the responsibility to cancel |
| 1020 | * the duplicate transaction that gets returned. |
| 1021 | */ |
| 1022 | error = xfs_trans_commit(trans, 0); |
| 1023 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1024 | return error; |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1025 | |
| 1026 | trans = *tpp; |
| 1027 | |
| 1028 | /* |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 1029 | * transaction commit worked ok so we can drop the extra ticket |
| 1030 | * reference that we gained in xfs_trans_dup() |
| 1031 | */ |
| 1032 | xfs_log_ticket_put(trans->t_ticket); |
| 1033 | |
| 1034 | |
| 1035 | /* |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1036 | * Reserve space in the log for th next transaction. |
| 1037 | * This also pushes items in the "AIL", the list of logged items, |
| 1038 | * out to disk if they are taking up space at the tail of the log |
| 1039 | * that we want to use. This requires that either nothing be locked |
| 1040 | * across this call, or that anything that is locked be logged in |
| 1041 | * the prior and the next transactions. |
| 1042 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1043 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
| 1044 | error = xfs_trans_reserve(trans, &tres, 0, 0); |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1045 | /* |
| 1046 | * Ensure that the inode is in the new transaction and locked. |
| 1047 | */ |
| 1048 | if (error) |
| 1049 | return error; |
| 1050 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1051 | xfs_trans_ijoin(trans, dp, 0); |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1052 | return 0; |
| 1053 | } |