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 | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 21 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_format.h" |
| 23 | #include "xfs_log_format.h" |
| 24 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [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" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 28 | #include "xfs_inode.h" |
Dave Chinner | efc27b5 | 2012-04-29 10:39:43 +0000 | [diff] [blame] | 29 | #include "xfs_extent_busy.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_quota.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 31 | #include "xfs_trans.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_trans_priv.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 33 | #include "xfs_log.h" |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 34 | #include "xfs_trace.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 35 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Nathan Scott | 8f79405 | 2006-03-14 13:32:41 +1100 | [diff] [blame] | 37 | kmem_zone_t *xfs_trans_zone; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 38 | kmem_zone_t *xfs_log_item_desc_zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Jeff Liu | 4f3b578 | 2013-01-28 21:25:35 +0800 | [diff] [blame] | 40 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | * Initialize the precomputed transaction reservation values |
| 42 | * in the mount structure. |
| 43 | */ |
| 44 | void |
| 45 | xfs_trans_init( |
Christoph Hellwig | 025101d | 2010-05-04 13:53:48 +0000 | [diff] [blame] | 46 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 48 | xfs_trans_resv_calc(mp, M_RES(mp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | /* |
| 52 | * This routine is called to allocate a transaction structure. |
| 53 | * The type parameter indicates the type of the transaction. These |
| 54 | * are enumerated in xfs_trans.h. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 55 | * |
| 56 | * Dynamically allocate the transaction structure from the transaction |
| 57 | * zone, initialize it, and return it to the caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | */ |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 59 | xfs_trans_t * |
| 60 | xfs_trans_alloc( |
| 61 | xfs_mount_t *mp, |
| 62 | uint type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 64 | xfs_trans_t *tp; |
| 65 | |
| 66 | sb_start_intwrite(mp->m_super); |
| 67 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); |
| 68 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; |
| 69 | return tp; |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | xfs_trans_t * |
| 73 | _xfs_trans_alloc( |
| 74 | xfs_mount_t *mp, |
| 75 | uint type, |
Al Viro | 77ba787 | 2012-04-02 06:24:04 -0400 | [diff] [blame] | 76 | xfs_km_flags_t memflags) |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 77 | { |
| 78 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 80 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
Nathan Scott | 34327e1 | 2006-06-09 17:11:55 +1000 | [diff] [blame] | 81 | atomic_inc(&mp->m_active_trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 83 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
Dave Chinner | 2a3c0ac | 2013-08-12 20:49:28 +1000 | [diff] [blame] | 84 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | tp->t_type = type; |
| 86 | tp->t_mountp = mp; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 87 | INIT_LIST_HEAD(&tp->t_items); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 88 | INIT_LIST_HEAD(&tp->t_busy); |
Nathan Scott | 34327e1 | 2006-06-09 17:11:55 +1000 | [diff] [blame] | 89 | return tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | /* |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 93 | * Free the transaction structure. If there is more clean up |
| 94 | * to do when the structure is freed, add it here. |
| 95 | */ |
| 96 | STATIC void |
| 97 | xfs_trans_free( |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 98 | struct xfs_trans *tp) |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 99 | { |
Dave Chinner | 4ecbfe6 | 2012-04-29 10:41:10 +0000 | [diff] [blame] | 100 | xfs_extent_busy_sort(&tp->t_busy); |
| 101 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 102 | |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 103 | atomic_dec(&tp->t_mountp->m_active_trans); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 104 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
| 105 | sb_end_intwrite(tp->t_mountp->m_super); |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 106 | xfs_trans_free_dqinfo(tp); |
| 107 | kmem_zone_free(xfs_trans_zone, tp); |
| 108 | } |
| 109 | |
| 110 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | * This is called to create a new transaction which will share the |
| 112 | * permanent log reservation of the given transaction. The remaining |
| 113 | * unused block and rt extent reservations are also inherited. This |
| 114 | * implies that the original transaction is no longer allowed to allocate |
| 115 | * blocks. Locks and log items, however, are no inherited. They must |
| 116 | * be added to the new transaction explicitly. |
| 117 | */ |
| 118 | xfs_trans_t * |
| 119 | xfs_trans_dup( |
| 120 | xfs_trans_t *tp) |
| 121 | { |
| 122 | xfs_trans_t *ntp; |
| 123 | |
| 124 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); |
| 125 | |
| 126 | /* |
| 127 | * Initialize the new transaction structure. |
| 128 | */ |
Dave Chinner | 2a3c0ac | 2013-08-12 20:49:28 +1000 | [diff] [blame] | 129 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | ntp->t_type = tp->t_type; |
| 131 | ntp->t_mountp = tp->t_mountp; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 132 | INIT_LIST_HEAD(&ntp->t_items); |
Dave Chinner | ed3b4d6 | 2010-05-21 12:07:08 +1000 | [diff] [blame] | 133 | INIT_LIST_HEAD(&ntp->t_busy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | ASSERT(tp->t_ticket != NULL); |
Nathan Scott | cfcbbbd | 2005-11-02 15:12:04 +1100 | [diff] [blame] | 137 | |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 138 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
| 139 | (tp->t_flags & XFS_TRANS_RESERVE) | |
| 140 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); |
| 141 | /* We gave our writer reference to the new transaction */ |
| 142 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 143 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
| 145 | tp->t_blk_res = tp->t_blk_res_used; |
| 146 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; |
| 147 | tp->t_rtx_res = tp->t_rtx_res_used; |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 148 | ntp->t_pflags = tp->t_pflags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 150 | xfs_trans_dup_dqinfo(tp, ntp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | atomic_inc(&tp->t_mountp->m_active_trans); |
| 153 | return ntp; |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * This is called to reserve free disk blocks and log space for the |
| 158 | * given transaction. This must be done before allocating any resources |
| 159 | * within the transaction. |
| 160 | * |
| 161 | * This will return ENOSPC if there are not enough blocks available. |
| 162 | * It will sleep waiting for available log space. |
| 163 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which |
| 164 | * is used by long running transactions. If any one of the reservations |
| 165 | * fails then they will all be backed out. |
| 166 | * |
| 167 | * This does not do quota reservations. That typically is done by the |
| 168 | * caller afterwards. |
| 169 | */ |
| 170 | int |
| 171 | xfs_trans_reserve( |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 172 | struct xfs_trans *tp, |
| 173 | struct xfs_trans_res *resp, |
| 174 | uint blocks, |
| 175 | uint rtextents) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 177 | int error = 0; |
| 178 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | /* Mark this thread as being in a transaction */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 181 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | /* |
| 184 | * Attempt to reserve the needed disk blocks by decrementing |
| 185 | * the number needed from the number available. This will |
| 186 | * fail if the count would go below zero. |
| 187 | */ |
| 188 | if (blocks > 0) { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 189 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 190 | -((int64_t)blocks), rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | if (error != 0) { |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 192 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | return (XFS_ERROR(ENOSPC)); |
| 194 | } |
| 195 | tp->t_blk_res += blocks; |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * Reserve the log space needed for this transaction. |
| 200 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 201 | if (resp->tr_logres > 0) { |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 202 | bool permanent = false; |
| 203 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 204 | ASSERT(tp->t_log_res == 0 || |
| 205 | tp->t_log_res == resp->tr_logres); |
| 206 | ASSERT(tp->t_log_count == 0 || |
| 207 | tp->t_log_count == resp->tr_logcount); |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 208 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 209 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 211 | permanent = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } else { |
| 213 | ASSERT(tp->t_ticket == NULL); |
| 214 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 217 | if (tp->t_ticket != NULL) { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 218 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 219 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
| 220 | } else { |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 221 | error = xfs_log_reserve(tp->t_mountp, |
| 222 | resp->tr_logres, |
| 223 | resp->tr_logcount, |
| 224 | &tp->t_ticket, XFS_TRANSACTION, |
| 225 | permanent, tp->t_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 227 | |
| 228 | if (error) |
| 229 | goto undo_blocks; |
| 230 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 231 | tp->t_log_res = resp->tr_logres; |
| 232 | tp->t_log_count = resp->tr_logcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Attempt to reserve the needed realtime extents by decrementing |
| 237 | * the number needed from the number available. This will |
| 238 | * fail if the count would go below zero. |
| 239 | */ |
| 240 | if (rtextents > 0) { |
| 241 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 242 | -((int64_t)rtextents), rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | if (error) { |
| 244 | error = XFS_ERROR(ENOSPC); |
| 245 | goto undo_log; |
| 246 | } |
| 247 | tp->t_rtx_res += rtextents; |
| 248 | } |
| 249 | |
| 250 | return 0; |
| 251 | |
| 252 | /* |
| 253 | * Error cases jump to one of these labels to undo any |
| 254 | * reservations which have already been performed. |
| 255 | */ |
| 256 | undo_log: |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 257 | if (resp->tr_logres > 0) { |
Christoph Hellwig | 9006fb9 | 2012-02-20 02:31:31 +0000 | [diff] [blame] | 258 | int log_flags; |
| 259 | |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 260 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 262 | } else { |
| 263 | log_flags = 0; |
| 264 | } |
| 265 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); |
| 266 | tp->t_ticket = NULL; |
| 267 | tp->t_log_res = 0; |
| 268 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; |
| 269 | } |
| 270 | |
| 271 | undo_blocks: |
| 272 | if (blocks > 0) { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 273 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 274 | (int64_t)blocks, rsvd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | tp->t_blk_res = 0; |
| 276 | } |
| 277 | |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 278 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 280 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | * Record the indicated change to the given field for application |
| 285 | * to the file system's superblock when the transaction commits. |
| 286 | * For now, just store the change in the transaction structure. |
| 287 | * |
| 288 | * Mark the transaction structure to indicate that the superblock |
| 289 | * needs to be updated before committing. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 290 | * |
| 291 | * Because we may not be keeping track of allocated/free inodes and |
| 292 | * used filesystem blocks in the superblock, we do not mark the |
| 293 | * superblock dirty in this transaction if we modify these fields. |
| 294 | * We still need to update the transaction deltas so that they get |
| 295 | * applied to the incore superblock, but we don't want them to |
| 296 | * cause the superblock to get locked and logged if these are the |
| 297 | * only fields in the superblock that the transaction modifies. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | */ |
| 299 | void |
| 300 | xfs_trans_mod_sb( |
| 301 | xfs_trans_t *tp, |
| 302 | uint field, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 303 | int64_t delta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | { |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 305 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
| 306 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | switch (field) { |
| 309 | case XFS_TRANS_SB_ICOUNT: |
| 310 | tp->t_icount_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 311 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 312 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | break; |
| 314 | case XFS_TRANS_SB_IFREE: |
| 315 | tp->t_ifree_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 316 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 317 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | break; |
| 319 | case XFS_TRANS_SB_FDBLOCKS: |
| 320 | /* |
| 321 | * Track the number of blocks allocated in the |
| 322 | * transaction. Make sure it does not exceed the |
| 323 | * number reserved. |
| 324 | */ |
| 325 | if (delta < 0) { |
| 326 | tp->t_blk_res_used += (uint)-delta; |
| 327 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); |
| 328 | } |
| 329 | tp->t_fdblocks_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 330 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 331 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | break; |
| 333 | case XFS_TRANS_SB_RES_FDBLOCKS: |
| 334 | /* |
| 335 | * The allocation has already been applied to the |
| 336 | * in-core superblock's counter. This should only |
| 337 | * be applied to the on-disk superblock. |
| 338 | */ |
| 339 | ASSERT(delta < 0); |
| 340 | tp->t_res_fdblocks_delta += delta; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 341 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 342 | flags &= ~XFS_TRANS_SB_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | break; |
| 344 | case XFS_TRANS_SB_FREXTENTS: |
| 345 | /* |
| 346 | * Track the number of blocks allocated in the |
| 347 | * transaction. Make sure it does not exceed the |
| 348 | * number reserved. |
| 349 | */ |
| 350 | if (delta < 0) { |
| 351 | tp->t_rtx_res_used += (uint)-delta; |
| 352 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); |
| 353 | } |
| 354 | tp->t_frextents_delta += delta; |
| 355 | break; |
| 356 | case XFS_TRANS_SB_RES_FREXTENTS: |
| 357 | /* |
| 358 | * The allocation has already been applied to the |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 359 | * in-core superblock's counter. This should only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | * be applied to the on-disk superblock. |
| 361 | */ |
| 362 | ASSERT(delta < 0); |
| 363 | tp->t_res_frextents_delta += delta; |
| 364 | break; |
| 365 | case XFS_TRANS_SB_DBLOCKS: |
| 366 | ASSERT(delta > 0); |
| 367 | tp->t_dblocks_delta += delta; |
| 368 | break; |
| 369 | case XFS_TRANS_SB_AGCOUNT: |
| 370 | ASSERT(delta > 0); |
| 371 | tp->t_agcount_delta += delta; |
| 372 | break; |
| 373 | case XFS_TRANS_SB_IMAXPCT: |
| 374 | tp->t_imaxpct_delta += delta; |
| 375 | break; |
| 376 | case XFS_TRANS_SB_REXTSIZE: |
| 377 | tp->t_rextsize_delta += delta; |
| 378 | break; |
| 379 | case XFS_TRANS_SB_RBMBLOCKS: |
| 380 | tp->t_rbmblocks_delta += delta; |
| 381 | break; |
| 382 | case XFS_TRANS_SB_RBLOCKS: |
| 383 | tp->t_rblocks_delta += delta; |
| 384 | break; |
| 385 | case XFS_TRANS_SB_REXTENTS: |
| 386 | tp->t_rextents_delta += delta; |
| 387 | break; |
| 388 | case XFS_TRANS_SB_REXTSLOG: |
| 389 | tp->t_rextslog_delta += delta; |
| 390 | break; |
| 391 | default: |
| 392 | ASSERT(0); |
| 393 | return; |
| 394 | } |
| 395 | |
David Chinner | 210c6f1 | 2007-05-24 15:26:51 +1000 | [diff] [blame] | 396 | tp->t_flags |= flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | /* |
| 400 | * xfs_trans_apply_sb_deltas() is called from the commit code |
| 401 | * to bring the superblock buffer into the current transaction |
| 402 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). |
| 403 | * |
| 404 | * For now we just look at each field allowed to change and change |
| 405 | * it if necessary. |
| 406 | */ |
| 407 | STATIC void |
| 408 | xfs_trans_apply_sb_deltas( |
| 409 | xfs_trans_t *tp) |
| 410 | { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 411 | xfs_dsb_t *sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | xfs_buf_t *bp; |
| 413 | int whole = 0; |
| 414 | |
| 415 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); |
| 416 | sbp = XFS_BUF_TO_SBP(bp); |
| 417 | |
| 418 | /* |
| 419 | * Check that superblock mods match the mods made to AGF counters. |
| 420 | */ |
| 421 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == |
| 422 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + |
| 423 | tp->t_ag_btree_delta)); |
| 424 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 425 | /* |
| 426 | * Only update the superblock counters if we are logging them |
| 427 | */ |
| 428 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 429 | if (tp->t_icount_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 430 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 431 | if (tp->t_ifree_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 432 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 433 | if (tp->t_fdblocks_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 434 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 435 | if (tp->t_res_fdblocks_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 436 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 439 | if (tp->t_frextents_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 440 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 441 | if (tp->t_res_frextents_delta) |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 442 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 443 | |
| 444 | if (tp->t_dblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 445 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | whole = 1; |
| 447 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 448 | if (tp->t_agcount_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 449 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | whole = 1; |
| 451 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 452 | if (tp->t_imaxpct_delta) { |
| 453 | sbp->sb_imax_pct += tp->t_imaxpct_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | whole = 1; |
| 455 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 456 | if (tp->t_rextsize_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 457 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | whole = 1; |
| 459 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 460 | if (tp->t_rbmblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 461 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | whole = 1; |
| 463 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 464 | if (tp->t_rblocks_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 465 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | whole = 1; |
| 467 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 468 | if (tp->t_rextents_delta) { |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 469 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | whole = 1; |
| 471 | } |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 472 | if (tp->t_rextslog_delta) { |
| 473 | sbp->sb_rextslog += tp->t_rextslog_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | whole = 1; |
| 475 | } |
| 476 | |
| 477 | if (whole) |
| 478 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 479 | * Log the whole thing, the fields are noncontiguous. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | */ |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 481 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | else |
| 483 | /* |
| 484 | * Since all the modifiable fields are contiguous, we |
| 485 | * can get away with this. |
| 486 | */ |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 487 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
| 488 | offsetof(xfs_dsb_t, sb_frextents) + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | sizeof(sbp->sb_frextents) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | /* |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 493 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
| 494 | * and apply superblock counter changes to the in-core superblock. The |
| 495 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT |
| 496 | * applied to the in-core superblock. The idea is that that has already been |
| 497 | * done. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | * |
| 499 | * 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] | 500 | * However, we have to ensure that we only modify each superblock field only |
| 501 | * once because the application of the delta values may not be atomic. That can |
| 502 | * lead to ENOSPC races occurring if we have two separate modifcations of the |
| 503 | * free space counter to put back the entire reservation and then take away |
| 504 | * what we used. |
| 505 | * |
| 506 | * If we are not logging superblock counters, then the inode allocated/free and |
| 507 | * used block counts are not updated in the on disk superblock. In this case, |
| 508 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we |
| 509 | * still need to update the incore superblock with the changes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | */ |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 511 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | xfs_trans_unreserve_and_mod_sb( |
| 513 | xfs_trans_t *tp) |
| 514 | { |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 515 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | xfs_mod_sb_t *msbp; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 517 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | /* REFERENCED */ |
| 519 | int error; |
| 520 | int rsvd; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 521 | int64_t blkdelta = 0; |
| 522 | int64_t rtxdelta = 0; |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 523 | int64_t idelta = 0; |
| 524 | int64_t ifreedelta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | msbp = msb; |
| 527 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
| 528 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 529 | /* calculate deltas */ |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 530 | if (tp->t_blk_res > 0) |
| 531 | blkdelta = tp->t_blk_res; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 532 | if ((tp->t_fdblocks_delta != 0) && |
| 533 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
| 534 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) |
| 535 | blkdelta += tp->t_fdblocks_delta; |
| 536 | |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 537 | if (tp->t_rtx_res > 0) |
| 538 | rtxdelta = tp->t_rtx_res; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 539 | if ((tp->t_frextents_delta != 0) && |
| 540 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) |
| 541 | rtxdelta += tp->t_frextents_delta; |
| 542 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 543 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
| 544 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { |
| 545 | idelta = tp->t_icount_delta; |
| 546 | ifreedelta = tp->t_ifree_delta; |
| 547 | } |
| 548 | |
| 549 | /* apply the per-cpu counters */ |
| 550 | if (blkdelta) { |
| 551 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
| 552 | blkdelta, rsvd); |
| 553 | if (error) |
| 554 | goto out; |
| 555 | } |
| 556 | |
| 557 | if (idelta) { |
| 558 | error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, |
| 559 | idelta, rsvd); |
| 560 | if (error) |
| 561 | goto out_undo_fdblocks; |
| 562 | } |
| 563 | |
| 564 | if (ifreedelta) { |
| 565 | error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, |
| 566 | ifreedelta, rsvd); |
| 567 | if (error) |
| 568 | goto out_undo_icount; |
| 569 | } |
| 570 | |
| 571 | /* apply remaining deltas */ |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 572 | if (rtxdelta != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | msbp->msb_field = XFS_SBS_FREXTENTS; |
David Chinner | 45c3414 | 2007-06-18 16:49:44 +1000 | [diff] [blame] | 574 | msbp->msb_delta = rtxdelta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | msbp++; |
| 576 | } |
| 577 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 578 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | if (tp->t_dblocks_delta != 0) { |
| 580 | msbp->msb_field = XFS_SBS_DBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 581 | msbp->msb_delta = tp->t_dblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | msbp++; |
| 583 | } |
| 584 | if (tp->t_agcount_delta != 0) { |
| 585 | msbp->msb_field = XFS_SBS_AGCOUNT; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 586 | msbp->msb_delta = tp->t_agcount_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | msbp++; |
| 588 | } |
| 589 | if (tp->t_imaxpct_delta != 0) { |
| 590 | msbp->msb_field = XFS_SBS_IMAX_PCT; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 591 | msbp->msb_delta = tp->t_imaxpct_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | msbp++; |
| 593 | } |
| 594 | if (tp->t_rextsize_delta != 0) { |
| 595 | msbp->msb_field = XFS_SBS_REXTSIZE; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 596 | msbp->msb_delta = tp->t_rextsize_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | msbp++; |
| 598 | } |
| 599 | if (tp->t_rbmblocks_delta != 0) { |
| 600 | msbp->msb_field = XFS_SBS_RBMBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 601 | msbp->msb_delta = tp->t_rbmblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | msbp++; |
| 603 | } |
| 604 | if (tp->t_rblocks_delta != 0) { |
| 605 | msbp->msb_field = XFS_SBS_RBLOCKS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 606 | msbp->msb_delta = tp->t_rblocks_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | msbp++; |
| 608 | } |
| 609 | if (tp->t_rextents_delta != 0) { |
| 610 | msbp->msb_field = XFS_SBS_REXTENTS; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 611 | msbp->msb_delta = tp->t_rextents_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | msbp++; |
| 613 | } |
| 614 | if (tp->t_rextslog_delta != 0) { |
| 615 | msbp->msb_field = XFS_SBS_REXTSLOG; |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 616 | msbp->msb_delta = tp->t_rextslog_delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | msbp++; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * If we need to change anything, do it. |
| 623 | */ |
| 624 | if (msbp > msb) { |
| 625 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, |
| 626 | (uint)(msbp - msb), rsvd); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 627 | if (error) |
| 628 | goto out_undo_ifreecount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 630 | |
| 631 | return; |
| 632 | |
| 633 | out_undo_ifreecount: |
| 634 | if (ifreedelta) |
| 635 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); |
| 636 | out_undo_icount: |
| 637 | if (idelta) |
| 638 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); |
| 639 | out_undo_fdblocks: |
| 640 | if (blkdelta) |
| 641 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); |
| 642 | out: |
Jesper Juhl | 1884bd8 | 2010-12-25 20:14:53 +0000 | [diff] [blame] | 643 | ASSERT(error == 0); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 644 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |
| 646 | |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 647 | /* |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 648 | * Add the given log item to the transaction's list of log items. |
| 649 | * |
| 650 | * The log item will now point to its new descriptor with its li_desc field. |
| 651 | */ |
| 652 | void |
| 653 | xfs_trans_add_item( |
| 654 | struct xfs_trans *tp, |
| 655 | struct xfs_log_item *lip) |
| 656 | { |
| 657 | struct xfs_log_item_desc *lidp; |
| 658 | |
Jesper Juhl | f65020a | 2012-02-13 20:51:05 +0000 | [diff] [blame] | 659 | ASSERT(lip->li_mountp == tp->t_mountp); |
| 660 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 661 | |
Dave Chinner | 4386970 | 2010-07-20 17:53:44 +1000 | [diff] [blame] | 662 | 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] | 663 | |
| 664 | lidp->lid_item = lip; |
| 665 | lidp->lid_flags = 0; |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 666 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
| 667 | |
| 668 | lip->li_desc = lidp; |
| 669 | } |
| 670 | |
| 671 | STATIC void |
| 672 | xfs_trans_free_item_desc( |
| 673 | struct xfs_log_item_desc *lidp) |
| 674 | { |
| 675 | list_del_init(&lidp->lid_trans); |
| 676 | kmem_zone_free(xfs_log_item_desc_zone, lidp); |
| 677 | } |
| 678 | |
| 679 | /* |
| 680 | * Unlink and free the given descriptor. |
| 681 | */ |
| 682 | void |
| 683 | xfs_trans_del_item( |
| 684 | struct xfs_log_item *lip) |
| 685 | { |
| 686 | xfs_trans_free_item_desc(lip->li_desc); |
| 687 | lip->li_desc = NULL; |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | * Unlock all of the items of a transaction and free all the descriptors |
| 692 | * of that transaction. |
| 693 | */ |
Dave Chinner | d17c701 | 2010-08-24 11:42:52 +1000 | [diff] [blame] | 694 | void |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 695 | xfs_trans_free_items( |
| 696 | struct xfs_trans *tp, |
| 697 | xfs_lsn_t commit_lsn, |
| 698 | int flags) |
| 699 | { |
| 700 | struct xfs_log_item_desc *lidp, *next; |
| 701 | |
| 702 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { |
| 703 | struct xfs_log_item *lip = lidp->lid_item; |
| 704 | |
| 705 | lip->li_desc = NULL; |
| 706 | |
| 707 | if (commit_lsn != NULLCOMMITLSN) |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 708 | lip->li_ops->iop_committing(lip, commit_lsn); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 709 | if (flags & XFS_TRANS_ABORT) |
| 710 | lip->li_flags |= XFS_LI_ABORTED; |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 711 | lip->li_ops->iop_unlock(lip); |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 712 | |
| 713 | xfs_trans_free_item_desc(lidp); |
| 714 | } |
| 715 | } |
| 716 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 717 | static inline void |
| 718 | xfs_log_item_batch_insert( |
| 719 | struct xfs_ail *ailp, |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 720 | struct xfs_ail_cursor *cur, |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 721 | struct xfs_log_item **log_items, |
| 722 | int nr_items, |
| 723 | xfs_lsn_t commit_lsn) |
| 724 | { |
| 725 | int i; |
| 726 | |
| 727 | spin_lock(&ailp->xa_lock); |
| 728 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 729 | 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] | 730 | |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 731 | for (i = 0; i < nr_items; i++) { |
| 732 | struct xfs_log_item *lip = log_items[i]; |
| 733 | |
| 734 | lip->li_ops->iop_unpin(lip, 0); |
| 735 | } |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Bulk operation version of xfs_trans_committed that takes a log vector of |
| 740 | * items to insert into the AIL. This uses bulk AIL insertion techniques to |
| 741 | * minimise lock traffic. |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 742 | * |
| 743 | * If we are called with the aborted flag set, it is because a log write during |
| 744 | * 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] | 745 | * checkpoint have already gone through iop_commited and iop_unlock, which |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 746 | * means that checkpoint commit abort handling is treated exactly the same |
| 747 | * 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] | 748 | * this case all we need to do is iop_committed processing, followed by an |
| 749 | * iop_unpin(aborted) call. |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 750 | * |
| 751 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not |
| 752 | * at the end of the AIL, the insert cursor avoids the need to walk |
| 753 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() |
| 754 | * call. This saves a lot of needless list walking and is a net win, even |
| 755 | * though it slightly increases that amount of AIL lock traffic to set it up |
| 756 | * and tear it down. |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 757 | */ |
| 758 | void |
| 759 | xfs_trans_committed_bulk( |
| 760 | struct xfs_ail *ailp, |
| 761 | struct xfs_log_vec *log_vector, |
| 762 | xfs_lsn_t commit_lsn, |
| 763 | int aborted) |
| 764 | { |
| 765 | #define LOG_ITEM_BATCH_SIZE 32 |
| 766 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; |
| 767 | struct xfs_log_vec *lv; |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 768 | struct xfs_ail_cursor cur; |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 769 | int i = 0; |
| 770 | |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 771 | spin_lock(&ailp->xa_lock); |
| 772 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); |
| 773 | spin_unlock(&ailp->xa_lock); |
| 774 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 775 | /* unpin all the log items */ |
| 776 | for (lv = log_vector; lv; lv = lv->lv_next ) { |
| 777 | struct xfs_log_item *lip = lv->lv_item; |
| 778 | xfs_lsn_t item_lsn; |
| 779 | |
| 780 | if (aborted) |
| 781 | lip->li_flags |= XFS_LI_ABORTED; |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 782 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 783 | |
Dave Chinner | 1316d4d | 2011-07-04 05:27:36 +0000 | [diff] [blame] | 784 | /* item_lsn of -1 means the item needs no further processing */ |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 785 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
| 786 | continue; |
| 787 | |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 788 | /* |
| 789 | * if we are aborting the operation, no point in inserting the |
| 790 | * object into the AIL as we are in a shutdown situation. |
| 791 | */ |
| 792 | if (aborted) { |
| 793 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 794 | lip->li_ops->iop_unpin(lip, 1); |
Dave Chinner | e34a314 | 2011-01-27 12:13:35 +1100 | [diff] [blame] | 795 | continue; |
| 796 | } |
| 797 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 798 | if (item_lsn != commit_lsn) { |
| 799 | |
| 800 | /* |
| 801 | * Not a bulk update option due to unusual item_lsn. |
| 802 | * Push into AIL immediately, rechecking the lsn once |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 803 | * we have the ail lock. Then unpin the item. This does |
| 804 | * not affect the AIL cursor the bulk insert path is |
| 805 | * using. |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 806 | */ |
| 807 | spin_lock(&ailp->xa_lock); |
| 808 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) |
| 809 | xfs_trans_ail_update(ailp, lip, item_lsn); |
| 810 | else |
| 811 | spin_unlock(&ailp->xa_lock); |
Dave Chinner | 904c17e | 2013-08-28 21:12:03 +1000 | [diff] [blame] | 812 | lip->li_ops->iop_unpin(lip, 0); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 813 | continue; |
| 814 | } |
| 815 | |
| 816 | /* Item is a candidate for bulk AIL insert. */ |
| 817 | log_items[i++] = lv->lv_item; |
| 818 | if (i >= LOG_ITEM_BATCH_SIZE) { |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 819 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 820 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
| 821 | i = 0; |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | /* make sure we insert the remainder! */ |
| 826 | if (i) |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 827 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
| 828 | |
| 829 | spin_lock(&ailp->xa_lock); |
Eric Sandeen | e4a1e29 | 2014-04-14 19:06:05 +1000 | [diff] [blame] | 830 | xfs_trans_ail_cursor_done(&cur); |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 831 | spin_unlock(&ailp->xa_lock); |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 832 | } |
| 833 | |
Dave Chinner | b1c1b5b | 2010-03-23 10:11:05 +1100 | [diff] [blame] | 834 | /* |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 835 | * Commit the given transaction to the log. |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 836 | * |
| 837 | * XFS disk error handling mechanism is not based on a typical |
| 838 | * transaction abort mechanism. Logically after the filesystem |
| 839 | * gets marked 'SHUTDOWN', we can't let any new transactions |
| 840 | * be durable - ie. committed to disk - because some metadata might |
| 841 | * be inconsistent. In such cases, this returns an error, and the |
| 842 | * caller may assume that all locked objects joined to the transaction |
| 843 | * have already been unlocked as if the commit had succeeded. |
| 844 | * Do not reference the transaction structure after this call. |
| 845 | */ |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 846 | int |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 847 | xfs_trans_commit( |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 848 | struct xfs_trans *tp, |
Christoph Hellwig | b103705 | 2011-09-19 14:55:51 +0000 | [diff] [blame] | 849 | uint flags) |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 850 | { |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 851 | struct xfs_mount *mp = tp->t_mountp; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 852 | xfs_lsn_t commit_lsn = -1; |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 853 | int error = 0; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 854 | int log_flags = 0; |
| 855 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 856 | |
| 857 | /* |
| 858 | * Determine whether this commit is releasing a permanent |
| 859 | * log reservation or not. |
| 860 | */ |
| 861 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { |
| 862 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 863 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 864 | } |
| 865 | |
| 866 | /* |
| 867 | * If there is nothing to be logged by the transaction, |
| 868 | * then unlock all of the items associated with the |
| 869 | * transaction and free the transaction structure. |
| 870 | * Also make sure to return any reserved blocks to |
| 871 | * the free pool. |
| 872 | */ |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 873 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
| 874 | goto out_unreserve; |
| 875 | |
| 876 | if (XFS_FORCED_SHUTDOWN(mp)) { |
| 877 | error = XFS_ERROR(EIO); |
| 878 | goto out_unreserve; |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 879 | } |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 880 | |
Dave Chinner | 0924378 | 2010-03-08 11:28:28 +1100 | [diff] [blame] | 881 | ASSERT(tp->t_ticket != NULL); |
| 882 | |
| 883 | /* |
| 884 | * If we need to update the superblock, then do it now. |
| 885 | */ |
| 886 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) |
| 887 | xfs_trans_apply_sb_deltas(tp); |
| 888 | xfs_trans_apply_dquot_deltas(tp); |
| 889 | |
Jie Liu | c6f9726 | 2014-02-07 15:26:07 +1100 | [diff] [blame] | 890 | xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Christoph Hellwig | 0244b96 | 2011-12-06 21:58:08 +0000 | [diff] [blame] | 892 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
| 893 | xfs_trans_free(tp); |
| 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | /* |
| 896 | * If the transaction needs to be synchronous, then force the |
| 897 | * log out now and wait for it. |
| 898 | */ |
| 899 | if (sync) { |
Jie Liu | c6f9726 | 2014-02-07 15:26:07 +1100 | [diff] [blame] | 900 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | XFS_STATS_INC(xs_trans_sync); |
| 902 | } else { |
| 903 | XFS_STATS_INC(xs_trans_async); |
| 904 | } |
| 905 | |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 906 | return error; |
| 907 | |
| 908 | out_unreserve: |
| 909 | xfs_trans_unreserve_and_mod_sb(tp); |
| 910 | |
| 911 | /* |
| 912 | * It is indeed possible for the transaction to be not dirty but |
| 913 | * the dqinfo portion to be. All that means is that we have some |
| 914 | * (non-persistent) quota reservations that need to be unreserved. |
| 915 | */ |
| 916 | xfs_trans_unreserve_and_mod_dquots(tp); |
| 917 | if (tp->t_ticket) { |
| 918 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
| 919 | if (commit_lsn == -1 && !error) |
| 920 | error = XFS_ERROR(EIO); |
| 921 | } |
| 922 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 923 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
Christoph Hellwig | a3ccd2c | 2010-03-15 12:52:49 +1100 | [diff] [blame] | 924 | xfs_trans_free(tp); |
| 925 | |
| 926 | XFS_STATS_INC(xs_trans_empty); |
| 927 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | * Unlock all of the transaction's items and free the transaction. |
| 932 | * The transaction must not have modified any of its items, because |
| 933 | * there is no way to restore them to their previous state. |
| 934 | * |
| 935 | * If the transaction has made a log reservation, make sure to release |
| 936 | * it as well. |
| 937 | */ |
| 938 | void |
| 939 | xfs_trans_cancel( |
| 940 | xfs_trans_t *tp, |
| 941 | int flags) |
| 942 | { |
| 943 | int log_flags; |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 944 | xfs_mount_t *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* |
| 947 | * See if the caller is being too lazy to figure out if |
| 948 | * the transaction really needs an abort. |
| 949 | */ |
| 950 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) |
| 951 | flags &= ~XFS_TRANS_ABORT; |
| 952 | /* |
| 953 | * See if the caller is relying on us to shut down the |
| 954 | * filesystem. This happens in paths where we detect |
| 955 | * corruption and decide to give up. |
| 956 | */ |
Nathan Scott | 60a204f | 2006-01-11 15:37:00 +1100 | [diff] [blame] | 957 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 958 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 959 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
Nathan Scott | 60a204f | 2006-01-11 15:37:00 +1100 | [diff] [blame] | 960 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | #ifdef DEBUG |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 962 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
| 963 | struct xfs_log_item_desc *lidp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 965 | list_for_each_entry(lidp, &tp->t_items, lid_trans) |
| 966 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | #endif |
| 969 | xfs_trans_unreserve_and_mod_sb(tp); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 970 | xfs_trans_unreserve_and_mod_dquots(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
| 972 | if (tp->t_ticket) { |
| 973 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { |
| 974 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 975 | log_flags = XFS_LOG_REL_PERM_RESERV; |
| 976 | } else { |
| 977 | log_flags = 0; |
| 978 | } |
Ryan Hankins | 0733af2 | 2006-01-11 15:36:44 +1100 | [diff] [blame] | 979 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | /* mark this thread as no longer being in a transaction */ |
Nathan Scott | 59c1b08 | 2006-06-09 14:59:13 +1000 | [diff] [blame] | 983 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 985 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | xfs_trans_free(tp); |
| 987 | } |
| 988 | |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 989 | /* |
| 990 | * Roll from one trans in the sequence of PERMANENT transactions to |
| 991 | * the next: permanent transactions are only flushed out when |
| 992 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon |
| 993 | * as possible to let chunks of it go to the log. So we commit the |
| 994 | * chunk we've been working on and get a new transaction to continue. |
| 995 | */ |
| 996 | int |
| 997 | xfs_trans_roll( |
| 998 | struct xfs_trans **tpp, |
| 999 | struct xfs_inode *dp) |
| 1000 | { |
| 1001 | struct xfs_trans *trans; |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1002 | struct xfs_trans_res tres; |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1003 | int error; |
| 1004 | |
| 1005 | /* |
| 1006 | * Ensure that the inode is always logged. |
| 1007 | */ |
| 1008 | trans = *tpp; |
| 1009 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); |
| 1010 | |
| 1011 | /* |
| 1012 | * Copy the critical parameters from one trans to the next. |
| 1013 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1014 | tres.tr_logres = trans->t_log_res; |
| 1015 | tres.tr_logcount = trans->t_log_count; |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1016 | *tpp = xfs_trans_dup(trans); |
| 1017 | |
| 1018 | /* |
| 1019 | * Commit the current transaction. |
| 1020 | * If this commit failed, then it'd just unlock those items that |
| 1021 | * are not marked ihold. That also means that a filesystem shutdown |
| 1022 | * is in progress. The caller takes the responsibility to cancel |
| 1023 | * the duplicate transaction that gets returned. |
| 1024 | */ |
| 1025 | error = xfs_trans_commit(trans, 0); |
| 1026 | if (error) |
| 1027 | return (error); |
| 1028 | |
| 1029 | trans = *tpp; |
| 1030 | |
| 1031 | /* |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 1032 | * transaction commit worked ok so we can drop the extra ticket |
| 1033 | * reference that we gained in xfs_trans_dup() |
| 1034 | */ |
| 1035 | xfs_log_ticket_put(trans->t_ticket); |
| 1036 | |
| 1037 | |
| 1038 | /* |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1039 | * Reserve space in the log for th next transaction. |
| 1040 | * This also pushes items in the "AIL", the list of logged items, |
| 1041 | * out to disk if they are taking up space at the tail of the log |
| 1042 | * that we want to use. This requires that either nothing be locked |
| 1043 | * across this call, or that anything that is locked be logged in |
| 1044 | * the prior and the next transactions. |
| 1045 | */ |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 1046 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
| 1047 | error = xfs_trans_reserve(trans, &tres, 0, 0); |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1048 | /* |
| 1049 | * Ensure that the inode is in the new transaction and locked. |
| 1050 | */ |
| 1051 | if (error) |
| 1052 | return error; |
| 1053 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1054 | xfs_trans_ijoin(trans, dp, 0); |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1055 | return 0; |
| 1056 | } |