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) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_trans.h" |
| 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_dir2.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 30 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_dinode.h" |
| 33 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_btree.h" |
| 35 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_alloc.h" |
| 37 | #include "xfs_rtalloc.h" |
| 38 | #include "xfs_bmap.h" |
| 39 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "xfs_rw.h" |
| 41 | #include "xfs_quota.h" |
| 42 | #include "xfs_fsops.h" |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 43 | #include "xfs_utils.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 44 | #include "xfs_trace.h" |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 47 | STATIC void xfs_unmountfs_wait(xfs_mount_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 49 | |
| 50 | #ifdef HAVE_PERCPU_SB |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 51 | STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 52 | int); |
| 53 | STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t, |
| 54 | int); |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 55 | STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 56 | #else |
| 57 | |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 58 | #define xfs_icsb_balance_counter(mp, a, b) do { } while (0) |
| 59 | #define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 60 | #endif |
| 61 | |
Christoph Hellwig | 1df84c9 | 2006-01-11 15:29:52 +1100 | [diff] [blame] | 62 | static const struct { |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 63 | short offset; |
| 64 | short type; /* 0 = integer |
| 65 | * 1 = binary / string (no translation) |
| 66 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | } xfs_sb_info[] = { |
| 68 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, |
| 69 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, |
| 70 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, |
| 71 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, |
| 72 | { offsetof(xfs_sb_t, sb_rextents), 0 }, |
| 73 | { offsetof(xfs_sb_t, sb_uuid), 1 }, |
| 74 | { offsetof(xfs_sb_t, sb_logstart), 0 }, |
| 75 | { offsetof(xfs_sb_t, sb_rootino), 0 }, |
| 76 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, |
| 77 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, |
| 78 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, |
| 79 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, |
| 80 | { offsetof(xfs_sb_t, sb_agcount), 0 }, |
| 81 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, |
| 82 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, |
| 83 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, |
| 84 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, |
| 85 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, |
| 86 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, |
| 87 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, |
| 88 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, |
| 89 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, |
| 90 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, |
| 91 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, |
| 92 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, |
| 93 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, |
| 94 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, |
| 95 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, |
| 96 | { offsetof(xfs_sb_t, sb_icount), 0 }, |
| 97 | { offsetof(xfs_sb_t, sb_ifree), 0 }, |
| 98 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, |
| 99 | { offsetof(xfs_sb_t, sb_frextents), 0 }, |
| 100 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, |
| 101 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, |
| 102 | { offsetof(xfs_sb_t, sb_qflags), 0 }, |
| 103 | { offsetof(xfs_sb_t, sb_flags), 0 }, |
| 104 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, |
| 105 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, |
| 106 | { offsetof(xfs_sb_t, sb_unit), 0 }, |
| 107 | { offsetof(xfs_sb_t, sb_width), 0 }, |
| 108 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, |
| 109 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, |
| 110 | { offsetof(xfs_sb_t, sb_logsectsize),0 }, |
| 111 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, |
| 112 | { offsetof(xfs_sb_t, sb_features2), 0 }, |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 113 | { offsetof(xfs_sb_t, sb_bad_features2), 0 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { sizeof(xfs_sb_t), 0 } |
| 115 | }; |
| 116 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 117 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
| 118 | static int xfs_uuid_table_size; |
| 119 | static uuid_t *xfs_uuid_table; |
| 120 | |
| 121 | /* |
| 122 | * See if the UUID is unique among mounted XFS filesystems. |
| 123 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. |
| 124 | */ |
| 125 | STATIC int |
| 126 | xfs_uuid_mount( |
| 127 | struct xfs_mount *mp) |
| 128 | { |
| 129 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 130 | int hole, i; |
| 131 | |
| 132 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 133 | return 0; |
| 134 | |
| 135 | if (uuid_is_nil(uuid)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 136 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 137 | return XFS_ERROR(EINVAL); |
| 138 | } |
| 139 | |
| 140 | mutex_lock(&xfs_uuid_table_mutex); |
| 141 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { |
| 142 | if (uuid_is_nil(&xfs_uuid_table[i])) { |
| 143 | hole = i; |
| 144 | continue; |
| 145 | } |
| 146 | if (uuid_equal(uuid, &xfs_uuid_table[i])) |
| 147 | goto out_duplicate; |
| 148 | } |
| 149 | |
| 150 | if (hole < 0) { |
| 151 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, |
| 152 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), |
| 153 | xfs_uuid_table_size * sizeof(*xfs_uuid_table), |
| 154 | KM_SLEEP); |
| 155 | hole = xfs_uuid_table_size++; |
| 156 | } |
| 157 | xfs_uuid_table[hole] = *uuid; |
| 158 | mutex_unlock(&xfs_uuid_table_mutex); |
| 159 | |
| 160 | return 0; |
| 161 | |
| 162 | out_duplicate: |
| 163 | mutex_unlock(&xfs_uuid_table_mutex); |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 164 | xfs_warn(mp, "Filesystem has duplicate UUID - can't mount"); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 165 | return XFS_ERROR(EINVAL); |
| 166 | } |
| 167 | |
| 168 | STATIC void |
| 169 | xfs_uuid_unmount( |
| 170 | struct xfs_mount *mp) |
| 171 | { |
| 172 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 173 | int i; |
| 174 | |
| 175 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 176 | return; |
| 177 | |
| 178 | mutex_lock(&xfs_uuid_table_mutex); |
| 179 | for (i = 0; i < xfs_uuid_table_size; i++) { |
| 180 | if (uuid_is_nil(&xfs_uuid_table[i])) |
| 181 | continue; |
| 182 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) |
| 183 | continue; |
| 184 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); |
| 185 | break; |
| 186 | } |
| 187 | ASSERT(i < xfs_uuid_table_size); |
| 188 | mutex_unlock(&xfs_uuid_table_mutex); |
| 189 | } |
| 190 | |
| 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | /* |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 193 | * Reference counting access wrappers to the perag structures. |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 194 | * Because we never free per-ag structures, the only thing we |
| 195 | * have to protect against changes is the tree structure itself. |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 196 | */ |
| 197 | struct xfs_perag * |
| 198 | xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno) |
| 199 | { |
| 200 | struct xfs_perag *pag; |
| 201 | int ref = 0; |
| 202 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 203 | rcu_read_lock(); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 204 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); |
| 205 | if (pag) { |
| 206 | ASSERT(atomic_read(&pag->pag_ref) >= 0); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 207 | ref = atomic_inc_return(&pag->pag_ref); |
| 208 | } |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 209 | rcu_read_unlock(); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 210 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
| 211 | return pag; |
| 212 | } |
| 213 | |
Dave Chinner | 65d0f20 | 2010-09-24 18:40:15 +1000 | [diff] [blame] | 214 | /* |
| 215 | * search from @first to find the next perag with the given tag set. |
| 216 | */ |
| 217 | struct xfs_perag * |
| 218 | xfs_perag_get_tag( |
| 219 | struct xfs_mount *mp, |
| 220 | xfs_agnumber_t first, |
| 221 | int tag) |
| 222 | { |
| 223 | struct xfs_perag *pag; |
| 224 | int found; |
| 225 | int ref; |
| 226 | |
| 227 | rcu_read_lock(); |
| 228 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, |
| 229 | (void **)&pag, first, 1, tag); |
| 230 | if (found <= 0) { |
| 231 | rcu_read_unlock(); |
| 232 | return NULL; |
| 233 | } |
| 234 | ref = atomic_inc_return(&pag->pag_ref); |
| 235 | rcu_read_unlock(); |
| 236 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); |
| 237 | return pag; |
| 238 | } |
| 239 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 240 | void |
| 241 | xfs_perag_put(struct xfs_perag *pag) |
| 242 | { |
| 243 | int ref; |
| 244 | |
| 245 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
| 246 | ref = atomic_dec_return(&pag->pag_ref); |
| 247 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); |
| 248 | } |
| 249 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 250 | STATIC void |
| 251 | __xfs_free_perag( |
| 252 | struct rcu_head *head) |
| 253 | { |
| 254 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); |
| 255 | |
| 256 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
| 257 | kmem_free(pag); |
| 258 | } |
| 259 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 260 | /* |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 261 | * Free up the per-ag resources associated with the mount structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | */ |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 263 | STATIC void |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 264 | xfs_free_perag( |
Christoph Hellwig | 745f691 | 2007-08-30 17:20:39 +1000 | [diff] [blame] | 265 | xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 267 | xfs_agnumber_t agno; |
| 268 | struct xfs_perag *pag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 270 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| 271 | spin_lock(&mp->m_perag_lock); |
| 272 | pag = radix_tree_delete(&mp->m_perag_tree, agno); |
| 273 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 274 | ASSERT(pag); |
Dave Chinner | f83282a | 2010-11-08 08:55:04 +0000 | [diff] [blame] | 275 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 276 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
| 279 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 280 | /* |
| 281 | * Check size of device based on the (data/realtime) block count. |
| 282 | * Note: this check is used by the growfs code as well as mount. |
| 283 | */ |
| 284 | int |
| 285 | xfs_sb_validate_fsb_count( |
| 286 | xfs_sb_t *sbp, |
| 287 | __uint64_t nblocks) |
| 288 | { |
| 289 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); |
| 290 | ASSERT(sbp->sb_blocklog >= BBSHIFT); |
| 291 | |
| 292 | #if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ |
| 293 | if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 294 | return EFBIG; |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 295 | #else /* Limited by UINT_MAX of sectors */ |
| 296 | if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX) |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 297 | return EFBIG; |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 298 | #endif |
| 299 | return 0; |
| 300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | /* |
| 303 | * Check the validity of the SB found. |
| 304 | */ |
| 305 | STATIC int |
| 306 | xfs_mount_validate_sb( |
| 307 | xfs_mount_t *mp, |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 308 | xfs_sb_t *sbp, |
| 309 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 311 | int loud = !(flags & XFS_MFSI_QUIET); |
| 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | /* |
| 314 | * If the log device and data device have the |
| 315 | * same device number, the log is internal. |
| 316 | * Consequently, the sb_logstart should be non-zero. If |
| 317 | * we have a zero sb_logstart in this case, we may be trying to mount |
| 318 | * a volume filesystem in a non-volume manner. |
| 319 | */ |
| 320 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 321 | if (loud) |
| 322 | xfs_warn(mp, "bad magic number"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return XFS_ERROR(EWRONGFS); |
| 324 | } |
| 325 | |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 326 | if (!xfs_sb_good_version(sbp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 327 | if (loud) |
| 328 | xfs_warn(mp, "bad version"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | return XFS_ERROR(EWRONGFS); |
| 330 | } |
| 331 | |
| 332 | if (unlikely( |
| 333 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 334 | if (loud) |
| 335 | xfs_warn(mp, |
| 336 | "filesystem is marked as having an external log; " |
| 337 | "specify logdev on the mount command line."); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 338 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | if (unlikely( |
| 342 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 343 | if (loud) |
| 344 | xfs_warn(mp, |
| 345 | "filesystem is marked as having an internal log; " |
| 346 | "do not specify logdev on the mount command line."); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 347 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | /* |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 351 | * More sanity checking. Most of these were stolen directly from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | * xfs_repair. |
| 353 | */ |
| 354 | if (unlikely( |
| 355 | sbp->sb_agcount <= 0 || |
| 356 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || |
| 357 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || |
| 358 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || |
| 359 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 360 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || |
| 362 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || |
| 363 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || |
| 364 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 365 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
| 367 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || |
Nathan Scott | 9f989c9 | 2006-03-14 13:29:32 +1100 | [diff] [blame] | 368 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || |
| 369 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 370 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || |
Nathan Scott | 9f989c9 | 2006-03-14 13:29:32 +1100 | [diff] [blame] | 371 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || |
| 373 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 374 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || |
| 375 | sbp->sb_dblocks == 0 || |
| 376 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || |
| 377 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 378 | if (loud) |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 379 | XFS_CORRUPTION_ERROR("SB sanity check failed", |
| 380 | XFS_ERRLEVEL_LOW, mp, sbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | return XFS_ERROR(EFSCORRUPTED); |
| 382 | } |
| 383 | |
Lachlan McIlroy | 2edbddd | 2008-06-27 13:34:34 +1000 | [diff] [blame] | 384 | /* |
| 385 | * Until this is fixed only page-sized or smaller data blocks work. |
| 386 | */ |
| 387 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 388 | if (loud) { |
| 389 | xfs_warn(mp, |
| 390 | "File system with blocksize %d bytes. " |
| 391 | "Only pagesize (%ld) or less will currently work.", |
| 392 | sbp->sb_blocksize, PAGE_SIZE); |
| 393 | } |
Lachlan McIlroy | 2edbddd | 2008-06-27 13:34:34 +1000 | [diff] [blame] | 394 | return XFS_ERROR(ENOSYS); |
| 395 | } |
| 396 | |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 397 | /* |
| 398 | * Currently only very few inode sizes are supported. |
| 399 | */ |
| 400 | switch (sbp->sb_inodesize) { |
| 401 | case 256: |
| 402 | case 512: |
| 403 | case 1024: |
| 404 | case 2048: |
| 405 | break; |
| 406 | default: |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 407 | if (loud) |
| 408 | xfs_warn(mp, "inode size of %d bytes not supported", |
| 409 | sbp->sb_inodesize); |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 410 | return XFS_ERROR(ENOSYS); |
| 411 | } |
| 412 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 413 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || |
| 414 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 415 | if (loud) |
| 416 | xfs_warn(mp, |
| 417 | "file system too large to be mounted on this system."); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 418 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | if (unlikely(sbp->sb_inprogress)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 422 | if (loud) |
| 423 | xfs_warn(mp, "file system busy"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return XFS_ERROR(EFSCORRUPTED); |
| 425 | } |
| 426 | |
| 427 | /* |
Nathan Scott | de20614 | 2005-05-05 13:24:13 -0700 | [diff] [blame] | 428 | * Version 1 directory format has never worked on Linux. |
| 429 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 430 | if (unlikely(!xfs_sb_version_hasdirv2(sbp))) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 431 | if (loud) |
| 432 | xfs_warn(mp, |
| 433 | "file system using version 1 directory format"); |
Nathan Scott | de20614 | 2005-05-05 13:24:13 -0700 | [diff] [blame] | 434 | return XFS_ERROR(ENOSYS); |
| 435 | } |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return 0; |
| 438 | } |
| 439 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 440 | int |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 441 | xfs_initialize_perag( |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 442 | xfs_mount_t *mp, |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 443 | xfs_agnumber_t agcount, |
| 444 | xfs_agnumber_t *maxagi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
| 446 | xfs_agnumber_t index, max_metadata; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 447 | xfs_agnumber_t first_initialised = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | xfs_perag_t *pag; |
| 449 | xfs_agino_t agino; |
| 450 | xfs_ino_t ino; |
| 451 | xfs_sb_t *sbp = &mp->m_sb; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 452 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 454 | /* |
| 455 | * Walk the current per-ag tree so we don't try to initialise AGs |
| 456 | * that already exist (growfs case). Allocate and insert all the |
| 457 | * AGs we don't find ready for initialisation. |
| 458 | */ |
| 459 | for (index = 0; index < agcount; index++) { |
| 460 | pag = xfs_perag_get(mp, index); |
| 461 | if (pag) { |
| 462 | xfs_perag_put(pag); |
| 463 | continue; |
| 464 | } |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 465 | if (!first_initialised) |
| 466 | first_initialised = index; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 467 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 468 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
| 469 | if (!pag) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 470 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 471 | pag->pag_agno = index; |
| 472 | pag->pag_mount = mp; |
Dave Chinner | 1a427ab | 2010-12-16 17:08:41 +1100 | [diff] [blame] | 473 | spin_lock_init(&pag->pag_ici_lock); |
Dave Chinner | 69b491c | 2010-09-27 11:09:51 +1000 | [diff] [blame] | 474 | mutex_init(&pag->pag_ici_reclaim_lock); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 475 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
Dave Chinner | 74f75a0 | 2010-09-24 19:59:04 +1000 | [diff] [blame] | 476 | spin_lock_init(&pag->pag_buf_lock); |
| 477 | pag->pag_buf_tree = RB_ROOT; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 478 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 479 | if (radix_tree_preload(GFP_NOFS)) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 480 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 481 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 482 | spin_lock(&mp->m_perag_lock); |
| 483 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { |
| 484 | BUG(); |
| 485 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 486 | radix_tree_preload_end(); |
| 487 | error = -EEXIST; |
| 488 | goto out_unwind; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 489 | } |
| 490 | spin_unlock(&mp->m_perag_lock); |
| 491 | radix_tree_preload_end(); |
| 492 | } |
| 493 | |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 494 | /* |
| 495 | * If we mount with the inode64 option, or no inode overflows |
| 496 | * the legacy 32-bit address space clear the inode32 option. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | */ |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 498 | agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); |
| 499 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 501 | if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) |
| 502 | mp->m_flags |= XFS_MOUNT_32BITINODES; |
| 503 | else |
| 504 | mp->m_flags &= ~XFS_MOUNT_32BITINODES; |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (mp->m_flags & XFS_MOUNT_32BITINODES) { |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 507 | /* |
| 508 | * Calculate how much should be reserved for inodes to meet |
| 509 | * the max inode percentage. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | */ |
| 511 | if (mp->m_maxicount) { |
| 512 | __uint64_t icount; |
| 513 | |
| 514 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| 515 | do_div(icount, 100); |
| 516 | icount += sbp->sb_agblocks - 1; |
Eric Sandeen | a749ee8 | 2005-11-02 15:13:42 +1100 | [diff] [blame] | 517 | do_div(icount, sbp->sb_agblocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | max_metadata = icount; |
| 519 | } else { |
| 520 | max_metadata = agcount; |
| 521 | } |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | for (index = 0; index < agcount; index++) { |
| 524 | ino = XFS_AGINO_TO_INO(mp, index, agino); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 525 | if (ino > XFS_MAXINUMBER_32) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | index++; |
| 527 | break; |
| 528 | } |
| 529 | |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 530 | pag = xfs_perag_get(mp, index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | pag->pagi_inodeok = 1; |
| 532 | if (index < max_metadata) |
| 533 | pag->pagf_metadata = 1; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 534 | xfs_perag_put(pag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
| 536 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | for (index = 0; index < agcount; index++) { |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 538 | pag = xfs_perag_get(mp, index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | pag->pagi_inodeok = 1; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 540 | xfs_perag_put(pag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | } |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 543 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 544 | if (maxagi) |
| 545 | *maxagi = index; |
| 546 | return 0; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 547 | |
| 548 | out_unwind: |
| 549 | kmem_free(pag); |
| 550 | for (; index > first_initialised; index--) { |
| 551 | pag = radix_tree_delete(&mp->m_perag_tree, index); |
| 552 | kmem_free(pag); |
| 553 | } |
| 554 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 557 | void |
| 558 | xfs_sb_from_disk( |
| 559 | xfs_sb_t *to, |
| 560 | xfs_dsb_t *from) |
| 561 | { |
| 562 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); |
| 563 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); |
| 564 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); |
| 565 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); |
| 566 | to->sb_rextents = be64_to_cpu(from->sb_rextents); |
| 567 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); |
| 568 | to->sb_logstart = be64_to_cpu(from->sb_logstart); |
| 569 | to->sb_rootino = be64_to_cpu(from->sb_rootino); |
| 570 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); |
| 571 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); |
| 572 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); |
| 573 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); |
| 574 | to->sb_agcount = be32_to_cpu(from->sb_agcount); |
| 575 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); |
| 576 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); |
| 577 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); |
| 578 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); |
| 579 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); |
| 580 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); |
| 581 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); |
| 582 | to->sb_blocklog = from->sb_blocklog; |
| 583 | to->sb_sectlog = from->sb_sectlog; |
| 584 | to->sb_inodelog = from->sb_inodelog; |
| 585 | to->sb_inopblog = from->sb_inopblog; |
| 586 | to->sb_agblklog = from->sb_agblklog; |
| 587 | to->sb_rextslog = from->sb_rextslog; |
| 588 | to->sb_inprogress = from->sb_inprogress; |
| 589 | to->sb_imax_pct = from->sb_imax_pct; |
| 590 | to->sb_icount = be64_to_cpu(from->sb_icount); |
| 591 | to->sb_ifree = be64_to_cpu(from->sb_ifree); |
| 592 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); |
| 593 | to->sb_frextents = be64_to_cpu(from->sb_frextents); |
| 594 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); |
| 595 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); |
| 596 | to->sb_qflags = be16_to_cpu(from->sb_qflags); |
| 597 | to->sb_flags = from->sb_flags; |
| 598 | to->sb_shared_vn = from->sb_shared_vn; |
| 599 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); |
| 600 | to->sb_unit = be32_to_cpu(from->sb_unit); |
| 601 | to->sb_width = be32_to_cpu(from->sb_width); |
| 602 | to->sb_dirblklog = from->sb_dirblklog; |
| 603 | to->sb_logsectlog = from->sb_logsectlog; |
| 604 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); |
| 605 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); |
| 606 | to->sb_features2 = be32_to_cpu(from->sb_features2); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 607 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 608 | } |
| 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | /* |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 611 | * Copy in core superblock to ondisk one. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | * |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 613 | * The fields argument is mask of superblock fields to copy. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | */ |
| 615 | void |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 616 | xfs_sb_to_disk( |
| 617 | xfs_dsb_t *to, |
| 618 | xfs_sb_t *from, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | __int64_t fields) |
| 620 | { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 621 | xfs_caddr_t to_ptr = (xfs_caddr_t)to; |
| 622 | xfs_caddr_t from_ptr = (xfs_caddr_t)from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | xfs_sb_field_t f; |
| 624 | int first; |
| 625 | int size; |
| 626 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | ASSERT(fields); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | if (!fields) |
| 629 | return; |
| 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | while (fields) { |
| 632 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); |
| 633 | first = xfs_sb_info[f].offset; |
| 634 | size = xfs_sb_info[f + 1].offset - first; |
| 635 | |
| 636 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); |
| 637 | |
| 638 | if (size == 1 || xfs_sb_info[f].type == 1) { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 639 | memcpy(to_ptr + first, from_ptr + first, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | } else { |
| 641 | switch (size) { |
| 642 | case 2: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 643 | *(__be16 *)(to_ptr + first) = |
| 644 | cpu_to_be16(*(__u16 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | break; |
| 646 | case 4: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 647 | *(__be32 *)(to_ptr + first) = |
| 648 | cpu_to_be32(*(__u32 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | break; |
| 650 | case 8: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 651 | *(__be64 *)(to_ptr + first) = |
| 652 | cpu_to_be64(*(__u64 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | break; |
| 654 | default: |
| 655 | ASSERT(0); |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | fields &= ~(1LL << f); |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | /* |
| 664 | * xfs_readsb |
| 665 | * |
| 666 | * Does the initial read of the superblock. |
| 667 | */ |
| 668 | int |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 669 | xfs_readsb(xfs_mount_t *mp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
| 671 | unsigned int sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | xfs_buf_t *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | int error; |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 674 | int loud = !(flags & XFS_MFSI_QUIET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | ASSERT(mp->m_sb_bp == NULL); |
| 677 | ASSERT(mp->m_ddev_targp != NULL); |
| 678 | |
| 679 | /* |
| 680 | * Allocate a (locked) buffer to hold the superblock. |
| 681 | * This will be kept around at all times to optimize |
| 682 | * access to the superblock. |
| 683 | */ |
| 684 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 686 | reread: |
| 687 | bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp, |
| 688 | XFS_SB_DADDR, sector_size, 0); |
| 689 | if (!bp) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 690 | if (loud) |
| 691 | xfs_warn(mp, "SB buffer read failed"); |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 692 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | /* |
| 696 | * Initialize the mount structure from the superblock. |
| 697 | * But first do some basic consistency checking. |
| 698 | */ |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 699 | xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp)); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 700 | error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | if (error) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 702 | if (loud) |
| 703 | xfs_warn(mp, "SB validate failed"); |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 704 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | /* |
| 708 | * We must be able to do sector-sized and sector-aligned IO. |
| 709 | */ |
| 710 | if (sector_size > mp->m_sb.sb_sectsize) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 711 | if (loud) |
| 712 | xfs_warn(mp, "device supports %u byte sectors (not %u)", |
| 713 | sector_size, mp->m_sb.sb_sectsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | error = ENOSYS; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 715 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | /* |
| 719 | * If device sector size is smaller than the superblock size, |
| 720 | * re-read the superblock so the buffer is correctly sized. |
| 721 | */ |
| 722 | if (sector_size < mp->m_sb.sb_sectsize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | xfs_buf_relse(bp); |
| 724 | sector_size = mp->m_sb.sb_sectsize; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 725 | goto reread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
| 727 | |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 728 | /* Initialize per-cpu counters */ |
| 729 | xfs_icsb_reinit_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | mp->m_sb_bp = bp; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 732 | xfs_buf_unlock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return 0; |
| 734 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 735 | release_buf: |
| 736 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | return error; |
| 738 | } |
| 739 | |
| 740 | |
| 741 | /* |
| 742 | * xfs_mount_common |
| 743 | * |
| 744 | * Mount initialization code establishing various mount |
| 745 | * fields from the superblock associated with the given |
| 746 | * mount structure |
| 747 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 748 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) |
| 750 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | mp->m_agfrotor = mp->m_agirotor = 0; |
Eric Sandeen | 007c61c | 2007-10-11 17:43:56 +1000 | [diff] [blame] | 752 | spin_lock_init(&mp->m_agirotor_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | mp->m_maxagi = mp->m_sb.sb_agcount; |
| 754 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; |
| 755 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; |
| 756 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; |
| 757 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; |
| 758 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | mp->m_blockmask = sbp->sb_blocksize - 1; |
| 760 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; |
| 761 | mp->m_blockwmask = mp->m_blockwsize - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 763 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 764 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 765 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; |
| 766 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; |
| 767 | |
| 768 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 769 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 770 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; |
| 771 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; |
| 772 | |
| 773 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 774 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 775 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; |
| 776 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
| 778 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
| 779 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, |
| 780 | sbp->sb_inopblock); |
| 781 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; |
| 782 | } |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 783 | |
| 784 | /* |
| 785 | * xfs_initialize_perag_data |
| 786 | * |
| 787 | * Read in each per-ag structure so we can count up the number of |
| 788 | * allocated inodes, free inodes and used filesystem blocks as this |
| 789 | * information is no longer persistent in the superblock. Once we have |
| 790 | * this information, write it into the in-core superblock structure. |
| 791 | */ |
| 792 | STATIC int |
| 793 | xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount) |
| 794 | { |
| 795 | xfs_agnumber_t index; |
| 796 | xfs_perag_t *pag; |
| 797 | xfs_sb_t *sbp = &mp->m_sb; |
| 798 | uint64_t ifree = 0; |
| 799 | uint64_t ialloc = 0; |
| 800 | uint64_t bfree = 0; |
| 801 | uint64_t bfreelst = 0; |
| 802 | uint64_t btree = 0; |
| 803 | int error; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 804 | |
| 805 | for (index = 0; index < agcount; index++) { |
| 806 | /* |
| 807 | * read the agf, then the agi. This gets us |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 808 | * all the information we need and populates the |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 809 | * per-ag structures for us. |
| 810 | */ |
| 811 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); |
| 812 | if (error) |
| 813 | return error; |
| 814 | |
| 815 | error = xfs_ialloc_pagi_init(mp, NULL, index); |
| 816 | if (error) |
| 817 | return error; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 818 | pag = xfs_perag_get(mp, index); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 819 | ifree += pag->pagi_freecount; |
| 820 | ialloc += pag->pagi_count; |
| 821 | bfree += pag->pagf_freeblks; |
| 822 | bfreelst += pag->pagf_flcount; |
| 823 | btree += pag->pagf_btreeblks; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 824 | xfs_perag_put(pag); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 825 | } |
| 826 | /* |
| 827 | * Overwrite incore superblock counters with just-read data |
| 828 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 829 | spin_lock(&mp->m_sb_lock); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 830 | sbp->sb_ifree = ifree; |
| 831 | sbp->sb_icount = ialloc; |
| 832 | sbp->sb_fdblocks = bfree + bfreelst + btree; |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 833 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 834 | |
| 835 | /* Fixup the per-cpu counters as well. */ |
| 836 | xfs_icsb_reinit_counters(mp); |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 842 | * Update alignment values based on mount options and sb values |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 844 | STATIC int |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 845 | xfs_update_alignment(xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | xfs_sb_t *sbp = &(mp->m_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 849 | if (mp->m_dalign) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | /* |
| 851 | * If stripe unit and stripe width are not multiples |
| 852 | * of the fs blocksize turn off alignment. |
| 853 | */ |
| 854 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || |
| 855 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { |
| 856 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 857 | xfs_warn(mp, "alignment check failed: " |
| 858 | "(sunit/swidth vs. blocksize)"); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 859 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | } |
| 861 | mp->m_dalign = mp->m_swidth = 0; |
| 862 | } else { |
| 863 | /* |
| 864 | * Convert the stripe unit and width to FSBs. |
| 865 | */ |
| 866 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); |
| 867 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { |
| 868 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 869 | xfs_warn(mp, "alignment check failed: " |
| 870 | "(sunit/swidth vs. ag size)"); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 871 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 873 | xfs_warn(mp, |
| 874 | "stripe alignment turned off: sunit(%d)/swidth(%d) " |
| 875 | "incompatible with agsize(%d)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | mp->m_dalign, mp->m_swidth, |
| 877 | sbp->sb_agblocks); |
| 878 | |
| 879 | mp->m_dalign = 0; |
| 880 | mp->m_swidth = 0; |
| 881 | } else if (mp->m_dalign) { |
| 882 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); |
| 883 | } else { |
| 884 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 885 | xfs_warn(mp, "alignment check failed: " |
| 886 | "sunit(%d) less than bsize(%d)", |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 887 | mp->m_dalign, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | mp->m_blockmask +1); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 889 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | mp->m_swidth = 0; |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | /* |
| 896 | * Update superblock with new values |
| 897 | * and log changes |
| 898 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 899 | if (xfs_sb_version_hasdalign(sbp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | if (sbp->sb_unit != mp->m_dalign) { |
| 901 | sbp->sb_unit = mp->m_dalign; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 902 | mp->m_update_flags |= XFS_SB_UNIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | } |
| 904 | if (sbp->sb_width != mp->m_swidth) { |
| 905 | sbp->sb_width = mp->m_swidth; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 906 | mp->m_update_flags |= XFS_SB_WIDTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | } |
| 909 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 910 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | mp->m_dalign = sbp->sb_unit; |
| 912 | mp->m_swidth = sbp->sb_width; |
| 913 | } |
| 914 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | /* |
| 919 | * Set the maximum inode count for this filesystem |
| 920 | */ |
| 921 | STATIC void |
| 922 | xfs_set_maxicount(xfs_mount_t *mp) |
| 923 | { |
| 924 | xfs_sb_t *sbp = &(mp->m_sb); |
| 925 | __uint64_t icount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
| 927 | if (sbp->sb_imax_pct) { |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 928 | /* |
| 929 | * Make sure the maximum inode count is a multiple |
| 930 | * of the units we allocate inodes in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| 933 | do_div(icount, 100); |
| 934 | do_div(icount, mp->m_ialloc_blks); |
| 935 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << |
| 936 | sbp->sb_inopblog; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 937 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | mp->m_maxicount = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 940 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 942 | /* |
| 943 | * Set the default minimum read and write sizes unless |
| 944 | * already specified in a mount option. |
| 945 | * We use smaller I/O sizes when the file system |
| 946 | * is being used for NFS service (wsync mount option). |
| 947 | */ |
| 948 | STATIC void |
| 949 | xfs_set_rw_sizes(xfs_mount_t *mp) |
| 950 | { |
| 951 | xfs_sb_t *sbp = &(mp->m_sb); |
| 952 | int readio_log, writeio_log; |
| 953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
| 955 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 956 | readio_log = XFS_WSYNC_READIO_LOG; |
| 957 | writeio_log = XFS_WSYNC_WRITEIO_LOG; |
| 958 | } else { |
| 959 | readio_log = XFS_READIO_LOG_LARGE; |
| 960 | writeio_log = XFS_WRITEIO_LOG_LARGE; |
| 961 | } |
| 962 | } else { |
| 963 | readio_log = mp->m_readio_log; |
| 964 | writeio_log = mp->m_writeio_log; |
| 965 | } |
| 966 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | if (sbp->sb_blocklog > readio_log) { |
| 968 | mp->m_readio_log = sbp->sb_blocklog; |
| 969 | } else { |
| 970 | mp->m_readio_log = readio_log; |
| 971 | } |
| 972 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); |
| 973 | if (sbp->sb_blocklog > writeio_log) { |
| 974 | mp->m_writeio_log = sbp->sb_blocklog; |
| 975 | } else { |
| 976 | mp->m_writeio_log = writeio_log; |
| 977 | } |
| 978 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 979 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 981 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 982 | * precalculate the low space thresholds for dynamic speculative preallocation. |
| 983 | */ |
| 984 | void |
| 985 | xfs_set_low_space_thresholds( |
| 986 | struct xfs_mount *mp) |
| 987 | { |
| 988 | int i; |
| 989 | |
| 990 | for (i = 0; i < XFS_LOWSP_MAX; i++) { |
| 991 | __uint64_t space = mp->m_sb.sb_dblocks; |
| 992 | |
| 993 | do_div(space, 100); |
| 994 | mp->m_low_space[i] = space * (i + 1); |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | |
| 999 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1000 | * Set whether we're using inode alignment. |
| 1001 | */ |
| 1002 | STATIC void |
| 1003 | xfs_set_inoalignment(xfs_mount_t *mp) |
| 1004 | { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 1005 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | mp->m_sb.sb_inoalignmt >= |
| 1007 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) |
| 1008 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; |
| 1009 | else |
| 1010 | mp->m_inoalign_mask = 0; |
| 1011 | /* |
| 1012 | * If we are using stripe alignment, check whether |
| 1013 | * the stripe unit is a multiple of the inode alignment |
| 1014 | */ |
| 1015 | if (mp->m_dalign && mp->m_inoalign_mask && |
| 1016 | !(mp->m_dalign & mp->m_inoalign_mask)) |
| 1017 | mp->m_sinoalign = mp->m_dalign; |
| 1018 | else |
| 1019 | mp->m_sinoalign = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | /* |
| 1023 | * Check that the data (and log if separate) are an ok size. |
| 1024 | */ |
| 1025 | STATIC int |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1026 | xfs_check_sizes(xfs_mount_t *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1027 | { |
| 1028 | xfs_buf_t *bp; |
| 1029 | xfs_daddr_t d; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
| 1032 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1033 | xfs_warn(mp, "filesystem size mismatch detected"); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 1034 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1036 | bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp, |
| 1037 | d - XFS_FSS_TO_BB(mp, 1), |
| 1038 | BBTOB(XFS_FSS_TO_BB(mp, 1)), 0); |
| 1039 | if (!bp) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1040 | xfs_warn(mp, "last sector read failed"); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1041 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1043 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1045 | if (mp->m_logdev_targp != mp->m_ddev_targp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); |
| 1047 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1048 | xfs_warn(mp, "log size mismatch detected"); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 1049 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1051 | bp = xfs_buf_read_uncached(mp, mp->m_logdev_targp, |
| 1052 | d - XFS_FSB_TO_BB(mp, 1), |
| 1053 | XFS_FSB_TO_B(mp, 1), 0); |
| 1054 | if (!bp) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1055 | xfs_warn(mp, "log device read failed"); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1056 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1058 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | /* |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1064 | * Clear the quotaflags in memory and in the superblock. |
| 1065 | */ |
| 1066 | int |
| 1067 | xfs_mount_reset_sbqflags( |
| 1068 | struct xfs_mount *mp) |
| 1069 | { |
| 1070 | int error; |
| 1071 | struct xfs_trans *tp; |
| 1072 | |
| 1073 | mp->m_qflags = 0; |
| 1074 | |
| 1075 | /* |
| 1076 | * It is OK to look at sb_qflags here in mount path, |
| 1077 | * without m_sb_lock. |
| 1078 | */ |
| 1079 | if (mp->m_sb.sb_qflags == 0) |
| 1080 | return 0; |
| 1081 | spin_lock(&mp->m_sb_lock); |
| 1082 | mp->m_sb.sb_qflags = 0; |
| 1083 | spin_unlock(&mp->m_sb_lock); |
| 1084 | |
| 1085 | /* |
| 1086 | * If the fs is readonly, let the incore superblock run |
| 1087 | * with quotas off but don't flush the update out to disk |
| 1088 | */ |
| 1089 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1090 | return 0; |
| 1091 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1092 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); |
| 1093 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1094 | XFS_DEFAULT_LOG_COUNT); |
| 1095 | if (error) { |
| 1096 | xfs_trans_cancel(tp, 0); |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 1097 | xfs_alert(mp, "%s: Superblock update failed!", __func__); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1098 | return error; |
| 1099 | } |
| 1100 | |
| 1101 | xfs_mod_sb(tp, XFS_SB_QFLAGS); |
| 1102 | return xfs_trans_commit(tp, 0); |
| 1103 | } |
| 1104 | |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1105 | __uint64_t |
| 1106 | xfs_default_resblks(xfs_mount_t *mp) |
| 1107 | { |
| 1108 | __uint64_t resblks; |
| 1109 | |
| 1110 | /* |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1111 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
| 1112 | * smaller. This is intended to cover concurrent allocation |
| 1113 | * transactions when we initially hit enospc. These each require a 4 |
| 1114 | * block reservation. Hence by default we cover roughly 2000 concurrent |
| 1115 | * allocation reservations. |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1116 | */ |
| 1117 | resblks = mp->m_sb.sb_dblocks; |
| 1118 | do_div(resblks, 20); |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1119 | resblks = min_t(__uint64_t, resblks, 8192); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1120 | return resblks; |
| 1121 | } |
| 1122 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1123 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1124 | * This function does the following on an initial mount of a file system: |
| 1125 | * - reads the superblock from disk and init the mount struct |
| 1126 | * - if we're a 32-bit kernel, do a size check on the superblock |
| 1127 | * so we don't mount terabyte filesystems |
| 1128 | * - init mount struct realtime fields |
| 1129 | * - allocate inode hash table for fs |
| 1130 | * - init directory manager |
| 1131 | * - perform recovery and init the log manager |
| 1132 | */ |
| 1133 | int |
| 1134 | xfs_mountfs( |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1135 | xfs_mount_t *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1136 | { |
| 1137 | xfs_sb_t *sbp = &(mp->m_sb); |
| 1138 | xfs_inode_t *rip; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1139 | __uint64_t resblks; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1140 | uint quotamount = 0; |
| 1141 | uint quotaflags = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1142 | int error = 0; |
| 1143 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1144 | xfs_mount_common(mp, sbp); |
| 1145 | |
| 1146 | /* |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1147 | * Check for a mismatched features2 values. Older kernels |
| 1148 | * read & wrote into the wrong sb offset for sb_features2 |
| 1149 | * on some platforms due to xfs_sb_t not being 64bit size aligned |
| 1150 | * when sb_features2 was added, which made older superblock |
| 1151 | * reading/writing routines swap it as a 64-bit value. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1152 | * |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1153 | * For backwards compatibility, we make both slots equal. |
| 1154 | * |
| 1155 | * If we detect a mismatched field, we OR the set bits into the |
| 1156 | * existing features2 field in case it has already been modified; we |
| 1157 | * don't want to lose any features. We then update the bad location |
| 1158 | * with the ORed value so that older kernels will see any features2 |
| 1159 | * flags, and mark the two fields as needing updates once the |
| 1160 | * transaction subsystem is online. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1161 | */ |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1162 | if (xfs_sb_has_mismatched_features2(sbp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1163 | xfs_warn(mp, "correcting sb_features alignment problem"); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1164 | sbp->sb_features2 |= sbp->sb_bad_features2; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1165 | sbp->sb_bad_features2 = sbp->sb_features2; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1166 | mp->m_update_flags |= XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1167 | |
| 1168 | /* |
| 1169 | * Re-check for ATTR2 in case it was found in bad_features2 |
| 1170 | * slot. |
| 1171 | */ |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1172 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 1173 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1174 | mp->m_flags |= XFS_MOUNT_ATTR2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1175 | } |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1176 | |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1177 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 1178 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { |
| 1179 | xfs_sb_version_removeattr2(&mp->m_sb); |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1180 | mp->m_update_flags |= XFS_SB_FEATURES2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1181 | |
| 1182 | /* update sb_versionnum for the clearing of the morebits */ |
| 1183 | if (!sbp->sb_features2) |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1184 | mp->m_update_flags |= XFS_SB_VERSIONNUM; |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1185 | } |
| 1186 | |
| 1187 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1188 | * Check if sb_agblocks is aligned at stripe boundary |
| 1189 | * If sb_agblocks is NOT aligned turn off m_dalign since |
| 1190 | * allocator alignment is within an ag, therefore ag has |
| 1191 | * to be aligned at stripe boundary. |
| 1192 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1193 | error = xfs_update_alignment(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1194 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1195 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1196 | |
| 1197 | xfs_alloc_compute_maxlevels(mp); |
| 1198 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); |
| 1199 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); |
| 1200 | xfs_ialloc_compute_maxlevels(mp); |
| 1201 | |
| 1202 | xfs_set_maxicount(mp); |
| 1203 | |
| 1204 | mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog); |
| 1205 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1206 | error = xfs_uuid_mount(mp); |
| 1207 | if (error) |
| 1208 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1209 | |
| 1210 | /* |
| 1211 | * Set the minimum read and write sizes |
| 1212 | */ |
| 1213 | xfs_set_rw_sizes(mp); |
| 1214 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 1215 | /* set the low space thresholds for dynamic preallocation */ |
| 1216 | xfs_set_low_space_thresholds(mp); |
| 1217 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1218 | /* |
| 1219 | * Set the inode cluster size. |
| 1220 | * This may still be overridden by the file system |
| 1221 | * block size if it is larger than the chosen cluster size. |
| 1222 | */ |
| 1223 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; |
| 1224 | |
| 1225 | /* |
| 1226 | * Set inode alignment fields |
| 1227 | */ |
| 1228 | xfs_set_inoalignment(mp); |
| 1229 | |
| 1230 | /* |
| 1231 | * Check that the data (and log if separate) are an ok size. |
| 1232 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1233 | error = xfs_check_sizes(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1234 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1235 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
| 1237 | /* |
| 1238 | * Initialize realtime fields in the mount structure |
| 1239 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1240 | error = xfs_rtmount_init(mp); |
| 1241 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1242 | xfs_warn(mp, "RT mount failed"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1243 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | } |
| 1245 | |
| 1246 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | * Copies the low order bits of the timestamp and the randomly |
| 1248 | * set "sequence" number out of a UUID. |
| 1249 | */ |
| 1250 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); |
| 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
| 1253 | |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1254 | xfs_dir_mount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | |
| 1256 | /* |
| 1257 | * Initialize the attribute manager's entries. |
| 1258 | */ |
| 1259 | mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100; |
| 1260 | |
| 1261 | /* |
| 1262 | * Initialize the precomputed transaction reservations values. |
| 1263 | */ |
| 1264 | xfs_trans_init(mp); |
| 1265 | |
| 1266 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | * Allocate and initialize the per-ag data. |
| 1268 | */ |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1269 | spin_lock_init(&mp->m_perag_lock); |
Dave Chinner | 9b98b6f | 2010-05-27 01:58:13 +0000 | [diff] [blame] | 1270 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1271 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
| 1272 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1273 | xfs_warn(mp, "Failed per-ag init: %d", error); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1274 | goto out_remove_uuid; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1275 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1277 | if (!sbp->sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1278 | xfs_warn(mp, "no log defined"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1279 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
| 1280 | error = XFS_ERROR(EFSCORRUPTED); |
| 1281 | goto out_free_perag; |
| 1282 | } |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | /* |
| 1285 | * log's mount-time initialization. Perform 1st part recovery if needed |
| 1286 | */ |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1287 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
| 1288 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), |
| 1289 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); |
| 1290 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1291 | xfs_warn(mp, "log mount failed"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1292 | goto out_free_perag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | /* |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1296 | * Now the log is mounted, we know if it was an unclean shutdown or |
| 1297 | * not. If it was, with the first phase of recovery has completed, we |
| 1298 | * have consistent AG blocks on disk. We have not recovered EFIs yet, |
| 1299 | * but they are recovered transactionally in the second recovery phase |
| 1300 | * later. |
| 1301 | * |
| 1302 | * Hence we can safely re-initialise incore superblock counters from |
| 1303 | * the per-ag data. These may not be correct if the filesystem was not |
| 1304 | * cleanly unmounted, so we need to wait for recovery to finish before |
| 1305 | * doing this. |
| 1306 | * |
| 1307 | * If the filesystem was cleanly unmounted, then we can trust the |
| 1308 | * values in the superblock to be correct and we don't need to do |
| 1309 | * anything here. |
| 1310 | * |
| 1311 | * If we are currently making the filesystem, the initialisation will |
| 1312 | * fail as the perag data is in an undefined state. |
| 1313 | */ |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1314 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
| 1315 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && |
| 1316 | !mp->m_sb.sb_inprogress) { |
| 1317 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1318 | if (error) |
| 1319 | goto out_free_perag; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1320 | } |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1321 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1322 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | * Get and sanity-check the root inode. |
| 1324 | * Save the pointer to it in the mount structure. |
| 1325 | */ |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 1326 | error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1328 | xfs_warn(mp, "failed to read root inode"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1329 | goto out_log_dealloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | ASSERT(rip != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 1334 | if (unlikely(!S_ISDIR(rip->i_d.di_mode))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1335 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
Nathan Scott | b657452 | 2006-06-09 15:29:40 +1000 | [diff] [blame] | 1336 | (unsigned long long)rip->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 1338 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, |
| 1339 | mp); |
| 1340 | error = XFS_ERROR(EFSCORRUPTED); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1341 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | } |
| 1343 | mp->m_rootip = rip; /* save it */ |
| 1344 | |
| 1345 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 1346 | |
| 1347 | /* |
| 1348 | * Initialize realtime inode pointers in the mount structure |
| 1349 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1350 | error = xfs_rtmount_inodes(mp); |
| 1351 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | /* |
| 1353 | * Free up the root inode. |
| 1354 | */ |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1355 | xfs_warn(mp, "failed to read RT inodes"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1356 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | /* |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1360 | * If this is a read-only mount defer the superblock updates until |
| 1361 | * the next remount into writeable mode. Otherwise we would never |
| 1362 | * perform the update e.g. for the root filesystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1364 | if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 1365 | error = xfs_mount_log_sb(mp, mp->m_update_flags); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1366 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1367 | xfs_warn(mp, "failed to write sb changes"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1368 | goto out_rtunmount; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1369 | } |
| 1370 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
| 1372 | /* |
| 1373 | * Initialise the XFS quota management subsystem for this mount |
| 1374 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1375 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
| 1376 | error = xfs_qm_newmount(mp, "amount, "aflags); |
| 1377 | if (error) |
| 1378 | goto out_rtunmount; |
| 1379 | } else { |
| 1380 | ASSERT(!XFS_IS_QUOTA_ON(mp)); |
| 1381 | |
| 1382 | /* |
| 1383 | * If a file system had quotas running earlier, but decided to |
| 1384 | * mount without -o uquota/pquota/gquota options, revoke the |
| 1385 | * quotachecked license. |
| 1386 | */ |
| 1387 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1388 | xfs_notice(mp, "resetting quota flags"); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1389 | error = xfs_mount_reset_sbqflags(mp); |
| 1390 | if (error) |
| 1391 | return error; |
| 1392 | } |
| 1393 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
| 1395 | /* |
| 1396 | * Finish recovering the file system. This part needed to be |
| 1397 | * delayed until after the root and real-time bitmap inodes |
| 1398 | * were consistently read in. |
| 1399 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1400 | error = xfs_log_mount_finish(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1402 | xfs_warn(mp, "log mount finish failed"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1403 | goto out_rtunmount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | } |
| 1405 | |
| 1406 | /* |
| 1407 | * Complete the quota initialisation, post-log-replay component. |
| 1408 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1409 | if (quotamount) { |
| 1410 | ASSERT(mp->m_qflags == 0); |
| 1411 | mp->m_qflags = quotaflags; |
| 1412 | |
| 1413 | xfs_qm_mount_quotas(mp); |
| 1414 | } |
| 1415 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1416 | /* |
| 1417 | * Now we are mounted, reserve a small amount of unused space for |
| 1418 | * privileged transactions. This is needed so that transaction |
| 1419 | * space required for critical operations can dip into this pool |
| 1420 | * when at ENOSPC. This is needed for operations like create with |
| 1421 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations |
| 1422 | * are not allowed to use this reserved space. |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1423 | * |
| 1424 | * This may drive us straight to ENOSPC on mount, but that implies |
| 1425 | * we were already there on the last unmount. Warn if this occurs. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1426 | */ |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1427 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 1428 | resblks = xfs_default_resblks(mp); |
| 1429 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1430 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1431 | xfs_warn(mp, |
| 1432 | "Unable to allocate reserve blocks. Continuing without reserve pool."); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1433 | } |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | return 0; |
| 1436 | |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1437 | out_rtunmount: |
| 1438 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1439 | out_rele_rip: |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 1440 | IRELE(rip); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1441 | out_log_dealloc: |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1442 | xfs_log_unmount(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1443 | out_free_perag: |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1444 | xfs_free_perag(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1445 | out_remove_uuid: |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1446 | xfs_uuid_unmount(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1447 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | return error; |
| 1449 | } |
| 1450 | |
| 1451 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | * This flushes out the inodes,dquots and the superblock, unmounts the |
| 1453 | * log and makes sure that incore structures are freed. |
| 1454 | */ |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 1455 | void |
| 1456 | xfs_unmountfs( |
| 1457 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | { |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 1459 | __uint64_t resblks; |
| 1460 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1462 | xfs_qm_unmount_quotas(mp); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1463 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | 77508ec | 2008-08-13 16:49:04 +1000 | [diff] [blame] | 1464 | IRELE(mp->m_rootip); |
| 1465 | |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1466 | /* |
| 1467 | * We can potentially deadlock here if we have an inode cluster |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1468 | * that has been freed has its buffer still pinned in memory because |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1469 | * the transaction is still sitting in a iclog. The stale inodes |
| 1470 | * on that buffer will have their flush locks held until the |
| 1471 | * transaction hits the disk and the callbacks run. the inode |
| 1472 | * flush takes the flush lock unconditionally and with nothing to |
| 1473 | * push out the iclog we will never get that unlocked. hence we |
| 1474 | * need to force the log first. |
| 1475 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1476 | xfs_log_force(mp, XFS_LOG_SYNC); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1477 | |
| 1478 | /* |
| 1479 | * Do a delwri reclaim pass first so that as many dirty inodes are |
| 1480 | * queued up for IO as possible. Then flush the buffers before making |
| 1481 | * a synchronous path to catch all the remaining inodes are reclaimed. |
| 1482 | * This makes the reclaim process as quick as possible by avoiding |
| 1483 | * synchronous writeout and blocking on inodes already in the delwri |
| 1484 | * state as much as possible. |
| 1485 | */ |
| 1486 | xfs_reclaim_inodes(mp, 0); |
| 1487 | XFS_bflush(mp->m_ddev_targp); |
| 1488 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1490 | xfs_qm_unmount(mp); |
Lachlan McIlroy | a357a12 | 2008-10-30 16:53:25 +1100 | [diff] [blame] | 1491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | /* |
| 1493 | * Flush out the log synchronously so that we know for sure |
| 1494 | * that nothing is pinned. This is important because bflush() |
| 1495 | * will skip pinned buffers. |
| 1496 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1497 | xfs_log_force(mp, XFS_LOG_SYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | |
| 1499 | xfs_binval(mp->m_ddev_targp); |
| 1500 | if (mp->m_rtdev_targp) { |
| 1501 | xfs_binval(mp->m_rtdev_targp); |
| 1502 | } |
| 1503 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1504 | /* |
| 1505 | * Unreserve any blocks we have so that when we unmount we don't account |
| 1506 | * the reserved free space as used. This is really only necessary for |
| 1507 | * lazy superblock counting because it trusts the incore superblock |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1508 | * counters to be absolutely correct on clean unmount. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1509 | * |
| 1510 | * We don't bother correcting this elsewhere for lazy superblock |
| 1511 | * counting because on mount of an unclean filesystem we reconstruct the |
| 1512 | * correct counter value and this is irrelevant. |
| 1513 | * |
| 1514 | * For non-lazy counter filesystems, this doesn't matter at all because |
| 1515 | * we only every apply deltas to the superblock and hence the incore |
| 1516 | * value does not matter.... |
| 1517 | */ |
| 1518 | resblks = 0; |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1519 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1520 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1521 | xfs_warn(mp, "Unable to free reserved block pool. " |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1522 | "Freespace may not be correct on next mount."); |
| 1523 | |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1524 | error = xfs_log_sbcount(mp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1525 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1526 | xfs_warn(mp, "Unable to update superblock counters. " |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1527 | "Freespace may not be correct on next mount."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | xfs_unmountfs_writesb(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | xfs_unmountfs_wait(mp); /* wait for async bufs */ |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1530 | xfs_log_unmount_write(mp); |
| 1531 | xfs_log_unmount(mp); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1532 | xfs_uuid_unmount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | |
Christoph Hellwig | 1550d0b | 2008-08-13 16:17:37 +1000 | [diff] [blame] | 1534 | #if defined(DEBUG) |
Christoph Hellwig | 0ce4cfd | 2007-08-30 17:20:53 +1000 | [diff] [blame] | 1535 | xfs_errortag_clearall(mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | #endif |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1537 | xfs_free_perag(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | } |
| 1539 | |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1540 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | xfs_unmountfs_wait(xfs_mount_t *mp) |
| 1542 | { |
| 1543 | if (mp->m_logdev_targp != mp->m_ddev_targp) |
| 1544 | xfs_wait_buftarg(mp->m_logdev_targp); |
| 1545 | if (mp->m_rtdev_targp) |
| 1546 | xfs_wait_buftarg(mp->m_rtdev_targp); |
| 1547 | xfs_wait_buftarg(mp->m_ddev_targp); |
| 1548 | } |
| 1549 | |
| 1550 | int |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1551 | xfs_fs_writable(xfs_mount_t *mp) |
| 1552 | { |
Christoph Hellwig | b267ce9 | 2007-08-30 17:21:30 +1000 | [diff] [blame] | 1553 | return !(xfs_test_for_freeze(mp) || XFS_FORCED_SHUTDOWN(mp) || |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 1554 | (mp->m_flags & XFS_MOUNT_RDONLY)); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1555 | } |
| 1556 | |
| 1557 | /* |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1558 | * xfs_log_sbcount |
| 1559 | * |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1560 | * Sync the superblock counters to disk. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1561 | * |
| 1562 | * Note this code can be called during the process of freezing, so |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1563 | * we may need to use the transaction allocator which does not |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1564 | * block when the transaction subsystem is in its frozen state. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1565 | */ |
| 1566 | int |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1567 | xfs_log_sbcount(xfs_mount_t *mp) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1568 | { |
| 1569 | xfs_trans_t *tp; |
| 1570 | int error; |
| 1571 | |
| 1572 | if (!xfs_fs_writable(mp)) |
| 1573 | return 0; |
| 1574 | |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 1575 | xfs_icsb_sync_counters(mp, 0); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1576 | |
| 1577 | /* |
| 1578 | * we don't need to do this if we are updating the superblock |
| 1579 | * counters on every modification. |
| 1580 | */ |
| 1581 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 1582 | return 0; |
| 1583 | |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1584 | tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1585 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1586 | XFS_DEFAULT_LOG_COUNT); |
| 1587 | if (error) { |
| 1588 | xfs_trans_cancel(tp, 0); |
| 1589 | return error; |
| 1590 | } |
| 1591 | |
| 1592 | xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS); |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1593 | xfs_trans_set_sync(tp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1594 | error = xfs_trans_commit(tp, 0); |
| 1595 | return error; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | xfs_unmountfs_writesb(xfs_mount_t *mp) |
| 1600 | { |
| 1601 | xfs_buf_t *sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | int error = 0; |
| 1603 | |
| 1604 | /* |
| 1605 | * skip superblock write if fs is read-only, or |
| 1606 | * if we are doing a forced umount. |
| 1607 | */ |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 1608 | if (!((mp->m_flags & XFS_MOUNT_RDONLY) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | XFS_FORCED_SHUTDOWN(mp))) { |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1610 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1611 | sbp = xfs_getsb(mp, 0); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | XFS_BUF_UNDONE(sbp); |
| 1614 | XFS_BUF_UNREAD(sbp); |
| 1615 | XFS_BUF_UNDELAYWRITE(sbp); |
| 1616 | XFS_BUF_WRITE(sbp); |
| 1617 | XFS_BUF_UNASYNC(sbp); |
Chandra Seetharaman | 49074c0 | 2011-07-22 23:40:40 +0000 | [diff] [blame] | 1618 | ASSERT(sbp->b_target == mp->m_ddev_targp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | xfsbdstrat(mp, sbp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 1620 | error = xfs_buf_iowait(sbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | if (error) |
| 1622 | xfs_ioerror_alert("xfs_unmountfs_writesb", |
| 1623 | mp, sbp, XFS_BUF_ADDR(sbp)); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1624 | xfs_buf_relse(sbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1626 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | /* |
| 1630 | * xfs_mod_sb() can be used to copy arbitrary changes to the |
| 1631 | * in-core superblock into the superblock buffer to be logged. |
| 1632 | * It does not provide the higher level of locking that is |
| 1633 | * needed to protect the in-core superblock from concurrent |
| 1634 | * access. |
| 1635 | */ |
| 1636 | void |
| 1637 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) |
| 1638 | { |
| 1639 | xfs_buf_t *bp; |
| 1640 | int first; |
| 1641 | int last; |
| 1642 | xfs_mount_t *mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | xfs_sb_field_t f; |
| 1644 | |
| 1645 | ASSERT(fields); |
| 1646 | if (!fields) |
| 1647 | return; |
| 1648 | mp = tp->t_mountp; |
| 1649 | bp = xfs_trans_getsb(tp, mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | first = sizeof(xfs_sb_t); |
| 1651 | last = 0; |
| 1652 | |
| 1653 | /* translate/copy */ |
| 1654 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 1655 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | |
| 1657 | /* find modified range */ |
Dave Chinner | 587aa0f | 2010-01-20 12:04:53 +1100 | [diff] [blame] | 1658 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); |
| 1659 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); |
| 1660 | last = xfs_sb_info[f + 1].offset - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
| 1662 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); |
| 1663 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); |
| 1664 | first = xfs_sb_info[f].offset; |
| 1665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | xfs_trans_log_buf(tp, bp, first, last); |
| 1667 | } |
Yingping Lu | d210a28 | 2006-06-09 14:55:18 +1000 | [diff] [blame] | 1668 | |
Yingping Lu | d210a28 | 2006-06-09 14:55:18 +1000 | [diff] [blame] | 1669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | /* |
| 1671 | * xfs_mod_incore_sb_unlocked() is a utility routine common used to apply |
| 1672 | * a delta to a specified field in the in-core superblock. Simply |
| 1673 | * switch on the field indicated and apply the delta to that field. |
| 1674 | * Fields are not allowed to dip below zero, so if the delta would |
| 1675 | * do this do not apply it and return EINVAL. |
| 1676 | * |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1677 | * The m_sb_lock must be held when this routine is called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 1679 | STATIC int |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 1680 | xfs_mod_incore_sb_unlocked( |
| 1681 | xfs_mount_t *mp, |
| 1682 | xfs_sb_field_t field, |
| 1683 | int64_t delta, |
| 1684 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | { |
| 1686 | int scounter; /* short counter for 32 bit fields */ |
| 1687 | long long lcounter; /* long counter for 64 bit fields */ |
| 1688 | long long res_used, rem; |
| 1689 | |
| 1690 | /* |
| 1691 | * With the in-core superblock spin lock held, switch |
| 1692 | * on the indicated field. Apply the delta to the |
| 1693 | * proper field. If the fields value would dip below |
| 1694 | * 0, then do not apply the delta and return EINVAL. |
| 1695 | */ |
| 1696 | switch (field) { |
| 1697 | case XFS_SBS_ICOUNT: |
| 1698 | lcounter = (long long)mp->m_sb.sb_icount; |
| 1699 | lcounter += delta; |
| 1700 | if (lcounter < 0) { |
| 1701 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1702 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | } |
| 1704 | mp->m_sb.sb_icount = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1705 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | case XFS_SBS_IFREE: |
| 1707 | lcounter = (long long)mp->m_sb.sb_ifree; |
| 1708 | lcounter += delta; |
| 1709 | if (lcounter < 0) { |
| 1710 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1711 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | } |
| 1713 | mp->m_sb.sb_ifree = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1714 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | case XFS_SBS_FDBLOCKS: |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 1716 | lcounter = (long long) |
| 1717 | mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); |
| 1719 | |
| 1720 | if (delta > 0) { /* Putting blocks back */ |
| 1721 | if (res_used > delta) { |
| 1722 | mp->m_resblks_avail += delta; |
| 1723 | } else { |
| 1724 | rem = delta - res_used; |
| 1725 | mp->m_resblks_avail = mp->m_resblks; |
| 1726 | lcounter += rem; |
| 1727 | } |
| 1728 | } else { /* Taking blocks away */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | lcounter += delta; |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1730 | if (lcounter >= 0) { |
| 1731 | mp->m_sb.sb_fdblocks = lcounter + |
| 1732 | XFS_ALLOC_SET_ASIDE(mp); |
| 1733 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | } |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1735 | |
| 1736 | /* |
| 1737 | * We are out of blocks, use any available reserved |
| 1738 | * blocks if were allowed to. |
| 1739 | */ |
| 1740 | if (!rsvd) |
| 1741 | return XFS_ERROR(ENOSPC); |
| 1742 | |
| 1743 | lcounter = (long long)mp->m_resblks_avail + delta; |
| 1744 | if (lcounter >= 0) { |
| 1745 | mp->m_resblks_avail = lcounter; |
| 1746 | return 0; |
| 1747 | } |
| 1748 | printk_once(KERN_WARNING |
| 1749 | "Filesystem \"%s\": reserve blocks depleted! " |
| 1750 | "Consider increasing reserve pool size.", |
| 1751 | mp->m_fsname); |
| 1752 | return XFS_ERROR(ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | } |
| 1754 | |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 1755 | mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1756 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | case XFS_SBS_FREXTENTS: |
| 1758 | lcounter = (long long)mp->m_sb.sb_frextents; |
| 1759 | lcounter += delta; |
| 1760 | if (lcounter < 0) { |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1761 | return XFS_ERROR(ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | } |
| 1763 | mp->m_sb.sb_frextents = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1764 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | case XFS_SBS_DBLOCKS: |
| 1766 | lcounter = (long long)mp->m_sb.sb_dblocks; |
| 1767 | lcounter += delta; |
| 1768 | if (lcounter < 0) { |
| 1769 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1770 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | } |
| 1772 | mp->m_sb.sb_dblocks = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1773 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | case XFS_SBS_AGCOUNT: |
| 1775 | scounter = mp->m_sb.sb_agcount; |
| 1776 | scounter += delta; |
| 1777 | if (scounter < 0) { |
| 1778 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1779 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | } |
| 1781 | mp->m_sb.sb_agcount = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1782 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | case XFS_SBS_IMAX_PCT: |
| 1784 | scounter = mp->m_sb.sb_imax_pct; |
| 1785 | scounter += delta; |
| 1786 | if (scounter < 0) { |
| 1787 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1788 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | } |
| 1790 | mp->m_sb.sb_imax_pct = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1791 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | case XFS_SBS_REXTSIZE: |
| 1793 | scounter = mp->m_sb.sb_rextsize; |
| 1794 | scounter += delta; |
| 1795 | if (scounter < 0) { |
| 1796 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1797 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | } |
| 1799 | mp->m_sb.sb_rextsize = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1800 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | case XFS_SBS_RBMBLOCKS: |
| 1802 | scounter = mp->m_sb.sb_rbmblocks; |
| 1803 | scounter += delta; |
| 1804 | if (scounter < 0) { |
| 1805 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1806 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | } |
| 1808 | mp->m_sb.sb_rbmblocks = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1809 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | case XFS_SBS_RBLOCKS: |
| 1811 | lcounter = (long long)mp->m_sb.sb_rblocks; |
| 1812 | lcounter += delta; |
| 1813 | if (lcounter < 0) { |
| 1814 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1815 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | } |
| 1817 | mp->m_sb.sb_rblocks = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1818 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | case XFS_SBS_REXTENTS: |
| 1820 | lcounter = (long long)mp->m_sb.sb_rextents; |
| 1821 | lcounter += delta; |
| 1822 | if (lcounter < 0) { |
| 1823 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1824 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | } |
| 1826 | mp->m_sb.sb_rextents = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1827 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | case XFS_SBS_REXTSLOG: |
| 1829 | scounter = mp->m_sb.sb_rextslog; |
| 1830 | scounter += delta; |
| 1831 | if (scounter < 0) { |
| 1832 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1833 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | } |
| 1835 | mp->m_sb.sb_rextslog = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1836 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | default: |
| 1838 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1839 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | /* |
| 1844 | * xfs_mod_incore_sb() is used to change a field in the in-core |
| 1845 | * superblock structure by the specified delta. This modification |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1846 | * is protected by the m_sb_lock. Just use the xfs_mod_incore_sb_unlocked() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | * routine to do the work. |
| 1848 | */ |
| 1849 | int |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 1850 | xfs_mod_incore_sb( |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1851 | struct xfs_mount *mp, |
| 1852 | xfs_sb_field_t field, |
| 1853 | int64_t delta, |
| 1854 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1856 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1858 | #ifdef HAVE_PERCPU_SB |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1859 | ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1860 | #endif |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1861 | spin_lock(&mp->m_sb_lock); |
| 1862 | status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); |
| 1863 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1864 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1865 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | } |
| 1867 | |
| 1868 | /* |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1869 | * Change more than one field in the in-core superblock structure at a time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | * |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1871 | * The fields and changes to those fields are specified in the array of |
| 1872 | * xfs_mod_sb structures passed in. Either all of the specified deltas |
| 1873 | * will be applied or none of them will. If any modified field dips below 0, |
| 1874 | * then all modifications will be backed out and EINVAL will be returned. |
| 1875 | * |
| 1876 | * Note that this function may not be used for the superblock values that |
| 1877 | * are tracked with the in-memory per-cpu counters - a direct call to |
| 1878 | * xfs_icsb_modify_counters is required for these. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | */ |
| 1880 | int |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1881 | xfs_mod_incore_sb_batch( |
| 1882 | struct xfs_mount *mp, |
| 1883 | xfs_mod_sb_t *msb, |
| 1884 | uint nmsb, |
| 1885 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | { |
David Sterba | 45c51b9 | 2011-04-13 22:03:28 +0000 | [diff] [blame] | 1887 | xfs_mod_sb_t *msbp; |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1888 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | |
| 1890 | /* |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1891 | * Loop through the array of mod structures and apply each individually. |
| 1892 | * If any fail, then back out all those which have already been applied. |
| 1893 | * Do all of this within the scope of the m_sb_lock so that all of the |
| 1894 | * changes will be atomic. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1896 | spin_lock(&mp->m_sb_lock); |
David Sterba | 45c51b9 | 2011-04-13 22:03:28 +0000 | [diff] [blame] | 1897 | for (msbp = msb; msbp < (msb + nmsb); msbp++) { |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1898 | ASSERT(msbp->msb_field < XFS_SBS_ICOUNT || |
| 1899 | msbp->msb_field > XFS_SBS_FDBLOCKS); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1900 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1901 | error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, |
| 1902 | msbp->msb_delta, rsvd); |
| 1903 | if (error) |
| 1904 | goto unwind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | } |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1906 | spin_unlock(&mp->m_sb_lock); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1907 | return 0; |
| 1908 | |
| 1909 | unwind: |
| 1910 | while (--msbp >= msb) { |
| 1911 | error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, |
| 1912 | -msbp->msb_delta, rsvd); |
| 1913 | ASSERT(error == 0); |
| 1914 | } |
| 1915 | spin_unlock(&mp->m_sb_lock); |
| 1916 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | } |
| 1918 | |
| 1919 | /* |
| 1920 | * xfs_getsb() is called to obtain the buffer for the superblock. |
| 1921 | * The buffer is returned locked and read in from disk. |
| 1922 | * The buffer should be released with a call to xfs_brelse(). |
| 1923 | * |
| 1924 | * If the flags parameter is BUF_TRYLOCK, then we'll only return |
| 1925 | * the superblock buffer if it can be locked without sleeping. |
| 1926 | * If it can't then we'll return NULL. |
| 1927 | */ |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1928 | struct xfs_buf * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | xfs_getsb( |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1930 | struct xfs_mount *mp, |
| 1931 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | { |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1933 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1935 | if (!xfs_buf_trylock(bp)) { |
| 1936 | if (flags & XBF_TRYLOCK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | return NULL; |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1938 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | } |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1940 | |
Chandra Seetharaman | 72790aa | 2011-07-22 23:40:04 +0000 | [diff] [blame] | 1941 | xfs_buf_hold(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | ASSERT(XFS_BUF_ISDONE(bp)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1943 | return bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | } |
| 1945 | |
| 1946 | /* |
| 1947 | * Used to free the superblock along various error paths. |
| 1948 | */ |
| 1949 | void |
| 1950 | xfs_freesb( |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1951 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | { |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1953 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1955 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | mp->m_sb_bp = NULL; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1957 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | * Used to log changes to the superblock unit and width fields which could |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1962 | * be altered by the mount options, as well as any potential sb_features2 |
| 1963 | * fixup. Only the first superblock is updated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1965 | int |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1966 | xfs_mount_log_sb( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | xfs_mount_t *mp, |
| 1968 | __int64_t fields) |
| 1969 | { |
| 1970 | xfs_trans_t *tp; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1971 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1973 | ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID | |
David Chinner | 4b166de | 2008-05-20 11:30:27 +1000 | [diff] [blame] | 1974 | XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2 | |
| 1975 | XFS_SB_VERSIONNUM)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | |
| 1977 | tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1978 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1979 | XFS_DEFAULT_LOG_COUNT); |
| 1980 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | xfs_trans_cancel(tp, 0); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1982 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | } |
| 1984 | xfs_mod_sb(tp, fields); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1985 | error = xfs_trans_commit(tp, 0); |
| 1986 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1988 | |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1989 | /* |
| 1990 | * If the underlying (data/log/rt) device is readonly, there are some |
| 1991 | * operations that cannot proceed. |
| 1992 | */ |
| 1993 | int |
| 1994 | xfs_dev_is_read_only( |
| 1995 | struct xfs_mount *mp, |
| 1996 | char *message) |
| 1997 | { |
| 1998 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || |
| 1999 | xfs_readonly_buftarg(mp->m_logdev_targp) || |
| 2000 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 2001 | xfs_notice(mp, "%s required on read-only device.", message); |
| 2002 | xfs_notice(mp, "write access unavailable, cannot proceed."); |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 2003 | return EROFS; |
| 2004 | } |
| 2005 | return 0; |
| 2006 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2007 | |
| 2008 | #ifdef HAVE_PERCPU_SB |
| 2009 | /* |
| 2010 | * Per-cpu incore superblock counters |
| 2011 | * |
| 2012 | * Simple concept, difficult implementation |
| 2013 | * |
| 2014 | * Basically, replace the incore superblock counters with a distributed per cpu |
| 2015 | * counter for contended fields (e.g. free block count). |
| 2016 | * |
| 2017 | * Difficulties arise in that the incore sb is used for ENOSPC checking, and |
| 2018 | * hence needs to be accurately read when we are running low on space. Hence |
| 2019 | * there is a method to enable and disable the per-cpu counters based on how |
| 2020 | * much "stuff" is available in them. |
| 2021 | * |
| 2022 | * Basically, a counter is enabled if there is enough free resource to justify |
| 2023 | * running a per-cpu fast-path. If the per-cpu counter runs out (i.e. a local |
| 2024 | * ENOSPC), then we disable the counters to synchronise all callers and |
| 2025 | * re-distribute the available resources. |
| 2026 | * |
| 2027 | * If, once we redistributed the available resources, we still get a failure, |
| 2028 | * we disable the per-cpu counter and go through the slow path. |
| 2029 | * |
| 2030 | * The slow path is the current xfs_mod_incore_sb() function. This means that |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 2031 | * when we disable a per-cpu counter, we need to drain its resources back to |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2032 | * the global superblock. We do this after disabling the counter to prevent |
| 2033 | * more threads from queueing up on the counter. |
| 2034 | * |
| 2035 | * Essentially, this means that we still need a lock in the fast path to enable |
| 2036 | * synchronisation between the global counters and the per-cpu counters. This |
| 2037 | * is not a problem because the lock will be local to a CPU almost all the time |
| 2038 | * and have little contention except when we get to ENOSPC conditions. |
| 2039 | * |
| 2040 | * Basically, this lock becomes a barrier that enables us to lock out the fast |
| 2041 | * path while we do things like enabling and disabling counters and |
| 2042 | * synchronising the counters. |
| 2043 | * |
| 2044 | * Locking rules: |
| 2045 | * |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2046 | * 1. m_sb_lock before picking up per-cpu locks |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2047 | * 2. per-cpu locks always picked up via for_each_online_cpu() order |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2048 | * 3. accurate counter sync requires m_sb_lock + per cpu locks |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2049 | * 4. modifying per-cpu counters requires holding per-cpu lock |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2050 | * 5. modifying global counters requires holding m_sb_lock |
| 2051 | * 6. enabling or disabling a counter requires holding the m_sb_lock |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2052 | * and _none_ of the per-cpu locks. |
| 2053 | * |
| 2054 | * Disabled counters are only ever re-enabled by a balance operation |
| 2055 | * that results in more free resources per CPU than a given threshold. |
| 2056 | * To ensure counters don't remain disabled, they are rebalanced when |
| 2057 | * the global resource goes above a higher threshold (i.e. some hysteresis |
| 2058 | * is present to prevent thrashing). |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2059 | */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2060 | |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2061 | #ifdef CONFIG_HOTPLUG_CPU |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2062 | /* |
| 2063 | * hot-plug CPU notifier support. |
| 2064 | * |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2065 | * We need a notifier per filesystem as we need to be able to identify |
| 2066 | * the filesystem to balance the counters out. This is achieved by |
| 2067 | * having a notifier block embedded in the xfs_mount_t and doing pointer |
| 2068 | * magic to get the mount pointer from the notifier block address. |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2069 | */ |
| 2070 | STATIC int |
| 2071 | xfs_icsb_cpu_notify( |
| 2072 | struct notifier_block *nfb, |
| 2073 | unsigned long action, |
| 2074 | void *hcpu) |
| 2075 | { |
| 2076 | xfs_icsb_cnts_t *cntp; |
| 2077 | xfs_mount_t *mp; |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2078 | |
| 2079 | mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier); |
| 2080 | cntp = (xfs_icsb_cnts_t *) |
| 2081 | per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu); |
| 2082 | switch (action) { |
| 2083 | case CPU_UP_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2084 | case CPU_UP_PREPARE_FROZEN: |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2085 | /* Easy Case - initialize the area and locks, and |
| 2086 | * then rebalance when online does everything else for us. */ |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2087 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2088 | break; |
| 2089 | case CPU_ONLINE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2090 | case CPU_ONLINE_FROZEN: |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2091 | xfs_icsb_lock(mp); |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2092 | xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); |
| 2093 | xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); |
| 2094 | xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2095 | xfs_icsb_unlock(mp); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2096 | break; |
| 2097 | case CPU_DEAD: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2098 | case CPU_DEAD_FROZEN: |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2099 | /* Disable all the counters, then fold the dead cpu's |
| 2100 | * count into the total on the global superblock and |
| 2101 | * re-enable the counters. */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2102 | xfs_icsb_lock(mp); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2103 | spin_lock(&mp->m_sb_lock); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2104 | xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT); |
| 2105 | xfs_icsb_disable_counter(mp, XFS_SBS_IFREE); |
| 2106 | xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS); |
| 2107 | |
| 2108 | mp->m_sb.sb_icount += cntp->icsb_icount; |
| 2109 | mp->m_sb.sb_ifree += cntp->icsb_ifree; |
| 2110 | mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks; |
| 2111 | |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2112 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2113 | |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2114 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); |
| 2115 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); |
| 2116 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2117 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2118 | xfs_icsb_unlock(mp); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2119 | break; |
| 2120 | } |
| 2121 | |
| 2122 | return NOTIFY_OK; |
| 2123 | } |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2124 | #endif /* CONFIG_HOTPLUG_CPU */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2125 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2126 | int |
| 2127 | xfs_icsb_init_counters( |
| 2128 | xfs_mount_t *mp) |
| 2129 | { |
| 2130 | xfs_icsb_cnts_t *cntp; |
| 2131 | int i; |
| 2132 | |
| 2133 | mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t); |
| 2134 | if (mp->m_sb_cnts == NULL) |
| 2135 | return -ENOMEM; |
| 2136 | |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2137 | #ifdef CONFIG_HOTPLUG_CPU |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2138 | mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify; |
| 2139 | mp->m_icsb_notifier.priority = 0; |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2140 | register_hotcpu_notifier(&mp->m_icsb_notifier); |
| 2141 | #endif /* CONFIG_HOTPLUG_CPU */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2142 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2143 | for_each_online_cpu(i) { |
| 2144 | cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2145 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2146 | } |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2147 | |
| 2148 | mutex_init(&mp->m_icsb_mutex); |
| 2149 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2150 | /* |
| 2151 | * start with all counters disabled so that the |
| 2152 | * initial balance kicks us off correctly |
| 2153 | */ |
| 2154 | mp->m_icsb_counters = -1; |
| 2155 | return 0; |
| 2156 | } |
| 2157 | |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 2158 | void |
| 2159 | xfs_icsb_reinit_counters( |
| 2160 | xfs_mount_t *mp) |
| 2161 | { |
| 2162 | xfs_icsb_lock(mp); |
| 2163 | /* |
| 2164 | * start with all counters disabled so that the |
| 2165 | * initial balance kicks us off correctly |
| 2166 | */ |
| 2167 | mp->m_icsb_counters = -1; |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2168 | xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); |
| 2169 | xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); |
| 2170 | xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 2171 | xfs_icsb_unlock(mp); |
| 2172 | } |
| 2173 | |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 2174 | void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2175 | xfs_icsb_destroy_counters( |
| 2176 | xfs_mount_t *mp) |
| 2177 | { |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2178 | if (mp->m_sb_cnts) { |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2179 | unregister_hotcpu_notifier(&mp->m_icsb_notifier); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2180 | free_percpu(mp->m_sb_cnts); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2181 | } |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2182 | mutex_destroy(&mp->m_icsb_mutex); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2183 | } |
| 2184 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2185 | STATIC void |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2186 | xfs_icsb_lock_cntr( |
| 2187 | xfs_icsb_cnts_t *icsbp) |
| 2188 | { |
| 2189 | while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) { |
| 2190 | ndelay(1000); |
| 2191 | } |
| 2192 | } |
| 2193 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2194 | STATIC void |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2195 | xfs_icsb_unlock_cntr( |
| 2196 | xfs_icsb_cnts_t *icsbp) |
| 2197 | { |
| 2198 | clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags); |
| 2199 | } |
| 2200 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2201 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2202 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2203 | xfs_icsb_lock_all_counters( |
| 2204 | xfs_mount_t *mp) |
| 2205 | { |
| 2206 | xfs_icsb_cnts_t *cntp; |
| 2207 | int i; |
| 2208 | |
| 2209 | for_each_online_cpu(i) { |
| 2210 | cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2211 | xfs_icsb_lock_cntr(cntp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2212 | } |
| 2213 | } |
| 2214 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2215 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2216 | xfs_icsb_unlock_all_counters( |
| 2217 | xfs_mount_t *mp) |
| 2218 | { |
| 2219 | xfs_icsb_cnts_t *cntp; |
| 2220 | int i; |
| 2221 | |
| 2222 | for_each_online_cpu(i) { |
| 2223 | cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2224 | xfs_icsb_unlock_cntr(cntp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2225 | } |
| 2226 | } |
| 2227 | |
| 2228 | STATIC void |
| 2229 | xfs_icsb_count( |
| 2230 | xfs_mount_t *mp, |
| 2231 | xfs_icsb_cnts_t *cnt, |
| 2232 | int flags) |
| 2233 | { |
| 2234 | xfs_icsb_cnts_t *cntp; |
| 2235 | int i; |
| 2236 | |
| 2237 | memset(cnt, 0, sizeof(xfs_icsb_cnts_t)); |
| 2238 | |
| 2239 | if (!(flags & XFS_ICSB_LAZY_COUNT)) |
| 2240 | xfs_icsb_lock_all_counters(mp); |
| 2241 | |
| 2242 | for_each_online_cpu(i) { |
| 2243 | cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); |
| 2244 | cnt->icsb_icount += cntp->icsb_icount; |
| 2245 | cnt->icsb_ifree += cntp->icsb_ifree; |
| 2246 | cnt->icsb_fdblocks += cntp->icsb_fdblocks; |
| 2247 | } |
| 2248 | |
| 2249 | if (!(flags & XFS_ICSB_LAZY_COUNT)) |
| 2250 | xfs_icsb_unlock_all_counters(mp); |
| 2251 | } |
| 2252 | |
| 2253 | STATIC int |
| 2254 | xfs_icsb_counter_disabled( |
| 2255 | xfs_mount_t *mp, |
| 2256 | xfs_sb_field_t field) |
| 2257 | { |
| 2258 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2259 | return test_bit(field, &mp->m_icsb_counters); |
| 2260 | } |
| 2261 | |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 2262 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2263 | xfs_icsb_disable_counter( |
| 2264 | xfs_mount_t *mp, |
| 2265 | xfs_sb_field_t field) |
| 2266 | { |
| 2267 | xfs_icsb_cnts_t cnt; |
| 2268 | |
| 2269 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2270 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2271 | /* |
| 2272 | * If we are already disabled, then there is nothing to do |
| 2273 | * here. We check before locking all the counters to avoid |
| 2274 | * the expensive lock operation when being called in the |
| 2275 | * slow path and the counter is already disabled. This is |
| 2276 | * safe because the only time we set or clear this state is under |
| 2277 | * the m_icsb_mutex. |
| 2278 | */ |
| 2279 | if (xfs_icsb_counter_disabled(mp, field)) |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 2280 | return; |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2281 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2282 | xfs_icsb_lock_all_counters(mp); |
| 2283 | if (!test_and_set_bit(field, &mp->m_icsb_counters)) { |
| 2284 | /* drain back to superblock */ |
| 2285 | |
Christoph Hellwig | ce46193 | 2008-04-22 17:34:50 +1000 | [diff] [blame] | 2286 | xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2287 | switch(field) { |
| 2288 | case XFS_SBS_ICOUNT: |
| 2289 | mp->m_sb.sb_icount = cnt.icsb_icount; |
| 2290 | break; |
| 2291 | case XFS_SBS_IFREE: |
| 2292 | mp->m_sb.sb_ifree = cnt.icsb_ifree; |
| 2293 | break; |
| 2294 | case XFS_SBS_FDBLOCKS: |
| 2295 | mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; |
| 2296 | break; |
| 2297 | default: |
| 2298 | BUG(); |
| 2299 | } |
| 2300 | } |
| 2301 | |
| 2302 | xfs_icsb_unlock_all_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2303 | } |
| 2304 | |
| 2305 | STATIC void |
| 2306 | xfs_icsb_enable_counter( |
| 2307 | xfs_mount_t *mp, |
| 2308 | xfs_sb_field_t field, |
| 2309 | uint64_t count, |
| 2310 | uint64_t resid) |
| 2311 | { |
| 2312 | xfs_icsb_cnts_t *cntp; |
| 2313 | int i; |
| 2314 | |
| 2315 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2316 | |
| 2317 | xfs_icsb_lock_all_counters(mp); |
| 2318 | for_each_online_cpu(i) { |
| 2319 | cntp = per_cpu_ptr(mp->m_sb_cnts, i); |
| 2320 | switch (field) { |
| 2321 | case XFS_SBS_ICOUNT: |
| 2322 | cntp->icsb_icount = count + resid; |
| 2323 | break; |
| 2324 | case XFS_SBS_IFREE: |
| 2325 | cntp->icsb_ifree = count + resid; |
| 2326 | break; |
| 2327 | case XFS_SBS_FDBLOCKS: |
| 2328 | cntp->icsb_fdblocks = count + resid; |
| 2329 | break; |
| 2330 | default: |
| 2331 | BUG(); |
| 2332 | break; |
| 2333 | } |
| 2334 | resid = 0; |
| 2335 | } |
| 2336 | clear_bit(field, &mp->m_icsb_counters); |
| 2337 | xfs_icsb_unlock_all_counters(mp); |
| 2338 | } |
| 2339 | |
David Chinner | dbcabad | 2007-02-10 18:36:17 +1100 | [diff] [blame] | 2340 | void |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2341 | xfs_icsb_sync_counters_locked( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2342 | xfs_mount_t *mp, |
| 2343 | int flags) |
| 2344 | { |
| 2345 | xfs_icsb_cnts_t cnt; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2346 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2347 | xfs_icsb_count(mp, &cnt, flags); |
| 2348 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2349 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) |
| 2350 | mp->m_sb.sb_icount = cnt.icsb_icount; |
| 2351 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) |
| 2352 | mp->m_sb.sb_ifree = cnt.icsb_ifree; |
| 2353 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) |
| 2354 | mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2355 | } |
| 2356 | |
| 2357 | /* |
| 2358 | * Accurate update of per-cpu counters to incore superblock |
| 2359 | */ |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2360 | void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2361 | xfs_icsb_sync_counters( |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2362 | xfs_mount_t *mp, |
| 2363 | int flags) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2364 | { |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2365 | spin_lock(&mp->m_sb_lock); |
| 2366 | xfs_icsb_sync_counters_locked(mp, flags); |
| 2367 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2368 | } |
| 2369 | |
| 2370 | /* |
| 2371 | * Balance and enable/disable counters as necessary. |
| 2372 | * |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2373 | * Thresholds for re-enabling counters are somewhat magic. inode counts are |
| 2374 | * chosen to be the same number as single on disk allocation chunk per CPU, and |
| 2375 | * free blocks is something far enough zero that we aren't going thrash when we |
| 2376 | * get near ENOSPC. We also need to supply a minimum we require per cpu to |
| 2377 | * prevent looping endlessly when xfs_alloc_space asks for more than will |
| 2378 | * be distributed to a single CPU but each CPU has enough blocks to be |
| 2379 | * reenabled. |
| 2380 | * |
| 2381 | * Note that we can be called when counters are already disabled. |
| 2382 | * xfs_icsb_disable_counter() optimises the counter locking in this case to |
| 2383 | * prevent locking every per-cpu counter needlessly. |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2384 | */ |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2385 | |
| 2386 | #define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64 |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2387 | #define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \ |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2388 | (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp)) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2389 | STATIC void |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2390 | xfs_icsb_balance_counter_locked( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2391 | xfs_mount_t *mp, |
| 2392 | xfs_sb_field_t field, |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2393 | int min_per_cpu) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2394 | { |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 2395 | uint64_t count, resid; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2396 | int weight = num_online_cpus(); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2397 | uint64_t min = (uint64_t)min_per_cpu; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2398 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2399 | /* disable counter and sync counter */ |
| 2400 | xfs_icsb_disable_counter(mp, field); |
| 2401 | |
| 2402 | /* update counters - first CPU gets residual*/ |
| 2403 | switch (field) { |
| 2404 | case XFS_SBS_ICOUNT: |
| 2405 | count = mp->m_sb.sb_icount; |
| 2406 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2407 | if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2408 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2409 | break; |
| 2410 | case XFS_SBS_IFREE: |
| 2411 | count = mp->m_sb.sb_ifree; |
| 2412 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2413 | if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2414 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2415 | break; |
| 2416 | case XFS_SBS_FDBLOCKS: |
| 2417 | count = mp->m_sb.sb_fdblocks; |
| 2418 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2419 | if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp))) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2420 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2421 | break; |
| 2422 | default: |
| 2423 | BUG(); |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 2424 | count = resid = 0; /* quiet, gcc */ |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2425 | break; |
| 2426 | } |
| 2427 | |
| 2428 | xfs_icsb_enable_counter(mp, field, count, resid); |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2429 | } |
| 2430 | |
| 2431 | STATIC void |
| 2432 | xfs_icsb_balance_counter( |
| 2433 | xfs_mount_t *mp, |
| 2434 | xfs_sb_field_t fields, |
| 2435 | int min_per_cpu) |
| 2436 | { |
| 2437 | spin_lock(&mp->m_sb_lock); |
| 2438 | xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu); |
| 2439 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2440 | } |
| 2441 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 2442 | int |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2443 | xfs_icsb_modify_counters( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2444 | xfs_mount_t *mp, |
| 2445 | xfs_sb_field_t field, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 2446 | int64_t delta, |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2447 | int rsvd) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2448 | { |
| 2449 | xfs_icsb_cnts_t *icsbp; |
| 2450 | long long lcounter; /* long counter for 64 bit fields */ |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2451 | int ret = 0; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2452 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2453 | might_sleep(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2454 | again: |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2455 | preempt_disable(); |
| 2456 | icsbp = this_cpu_ptr(mp->m_sb_cnts); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2457 | |
| 2458 | /* |
| 2459 | * if the counter is disabled, go to slow path |
| 2460 | */ |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2461 | if (unlikely(xfs_icsb_counter_disabled(mp, field))) |
| 2462 | goto slow_path; |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2463 | xfs_icsb_lock_cntr(icsbp); |
| 2464 | if (unlikely(xfs_icsb_counter_disabled(mp, field))) { |
| 2465 | xfs_icsb_unlock_cntr(icsbp); |
| 2466 | goto slow_path; |
| 2467 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2468 | |
| 2469 | switch (field) { |
| 2470 | case XFS_SBS_ICOUNT: |
| 2471 | lcounter = icsbp->icsb_icount; |
| 2472 | lcounter += delta; |
| 2473 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2474 | goto balance_counter; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2475 | icsbp->icsb_icount = lcounter; |
| 2476 | break; |
| 2477 | |
| 2478 | case XFS_SBS_IFREE: |
| 2479 | lcounter = icsbp->icsb_ifree; |
| 2480 | lcounter += delta; |
| 2481 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2482 | goto balance_counter; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2483 | icsbp->icsb_ifree = lcounter; |
| 2484 | break; |
| 2485 | |
| 2486 | case XFS_SBS_FDBLOCKS: |
| 2487 | BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0); |
| 2488 | |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2489 | lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2490 | lcounter += delta; |
| 2491 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2492 | goto balance_counter; |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2493 | icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2494 | break; |
| 2495 | default: |
| 2496 | BUG(); |
| 2497 | break; |
| 2498 | } |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2499 | xfs_icsb_unlock_cntr(icsbp); |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2500 | preempt_enable(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2501 | return 0; |
| 2502 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2503 | slow_path: |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2504 | preempt_enable(); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2505 | |
| 2506 | /* |
| 2507 | * serialise with a mutex so we don't burn lots of cpu on |
| 2508 | * the superblock lock. We still need to hold the superblock |
| 2509 | * lock, however, when we modify the global structures. |
| 2510 | */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2511 | xfs_icsb_lock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2512 | |
| 2513 | /* |
| 2514 | * Now running atomically. |
| 2515 | * |
| 2516 | * If the counter is enabled, someone has beaten us to rebalancing. |
| 2517 | * Drop the lock and try again in the fast path.... |
| 2518 | */ |
| 2519 | if (!(xfs_icsb_counter_disabled(mp, field))) { |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2520 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2521 | goto again; |
| 2522 | } |
| 2523 | |
| 2524 | /* |
| 2525 | * The counter is currently disabled. Because we are |
| 2526 | * running atomically here, we know a rebalance cannot |
| 2527 | * be in progress. Hence we can go straight to operating |
| 2528 | * on the global superblock. We do not call xfs_mod_incore_sb() |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2529 | * here even though we need to get the m_sb_lock. Doing so |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2530 | * will cause us to re-enter this function and deadlock. |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2531 | * Hence we get the m_sb_lock ourselves and then call |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2532 | * xfs_mod_incore_sb_unlocked() as the unlocked path operates |
| 2533 | * directly on the global counters. |
| 2534 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2535 | spin_lock(&mp->m_sb_lock); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2536 | ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2537 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2538 | |
| 2539 | /* |
| 2540 | * Now that we've modified the global superblock, we |
| 2541 | * may be able to re-enable the distributed counters |
| 2542 | * (e.g. lots of space just got freed). After that |
| 2543 | * we are done. |
| 2544 | */ |
| 2545 | if (ret != ENOSPC) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2546 | xfs_icsb_balance_counter(mp, field, 0); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2547 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2548 | return ret; |
| 2549 | |
| 2550 | balance_counter: |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2551 | xfs_icsb_unlock_cntr(icsbp); |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2552 | preempt_enable(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2553 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2554 | /* |
| 2555 | * We may have multiple threads here if multiple per-cpu |
| 2556 | * counters run dry at the same time. This will mean we can |
| 2557 | * do more balances than strictly necessary but it is not |
| 2558 | * the common slowpath case. |
| 2559 | */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2560 | xfs_icsb_lock(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2561 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2562 | /* |
| 2563 | * running atomically. |
| 2564 | * |
| 2565 | * This will leave the counter in the correct state for future |
| 2566 | * accesses. After the rebalance, we simply try again and our retry |
| 2567 | * will either succeed through the fast path or slow path without |
| 2568 | * another balance operation being required. |
| 2569 | */ |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2570 | xfs_icsb_balance_counter(mp, field, delta); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2571 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2572 | goto again; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2573 | } |
| 2574 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2575 | #endif |