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" |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 25 | #include "xfs_trans_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_sb.h" |
| 27 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_dir2.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_dinode.h" |
| 34 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_btree.h" |
| 36 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_alloc.h" |
| 38 | #include "xfs_rtalloc.h" |
| 39 | #include "xfs_bmap.h" |
| 40 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 47 | #ifdef HAVE_PERCPU_SB |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 48 | 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] | 49 | int); |
| 50 | STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t, |
| 51 | int); |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 52 | 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] | 53 | #else |
| 54 | |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 55 | #define xfs_icsb_balance_counter(mp, a, b) do { } while (0) |
| 56 | #define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 57 | #endif |
| 58 | |
Christoph Hellwig | 1df84c9 | 2006-01-11 15:29:52 +1100 | [diff] [blame] | 59 | static const struct { |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 60 | short offset; |
| 61 | short type; /* 0 = integer |
| 62 | * 1 = binary / string (no translation) |
| 63 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } xfs_sb_info[] = { |
| 65 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, |
| 66 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, |
| 67 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, |
| 68 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, |
| 69 | { offsetof(xfs_sb_t, sb_rextents), 0 }, |
| 70 | { offsetof(xfs_sb_t, sb_uuid), 1 }, |
| 71 | { offsetof(xfs_sb_t, sb_logstart), 0 }, |
| 72 | { offsetof(xfs_sb_t, sb_rootino), 0 }, |
| 73 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, |
| 74 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, |
| 75 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, |
| 76 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, |
| 77 | { offsetof(xfs_sb_t, sb_agcount), 0 }, |
| 78 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, |
| 79 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, |
| 80 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, |
| 81 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, |
| 82 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, |
| 83 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, |
| 84 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, |
| 85 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, |
| 86 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, |
| 87 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, |
| 88 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, |
| 89 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, |
| 90 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, |
| 91 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, |
| 92 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, |
| 93 | { offsetof(xfs_sb_t, sb_icount), 0 }, |
| 94 | { offsetof(xfs_sb_t, sb_ifree), 0 }, |
| 95 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, |
| 96 | { offsetof(xfs_sb_t, sb_frextents), 0 }, |
| 97 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, |
| 98 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, |
| 99 | { offsetof(xfs_sb_t, sb_qflags), 0 }, |
| 100 | { offsetof(xfs_sb_t, sb_flags), 0 }, |
| 101 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, |
| 102 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, |
| 103 | { offsetof(xfs_sb_t, sb_unit), 0 }, |
| 104 | { offsetof(xfs_sb_t, sb_width), 0 }, |
| 105 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, |
| 106 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, |
| 107 | { offsetof(xfs_sb_t, sb_logsectsize),0 }, |
| 108 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, |
| 109 | { offsetof(xfs_sb_t, sb_features2), 0 }, |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 110 | { offsetof(xfs_sb_t, sb_bad_features2), 0 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | { sizeof(xfs_sb_t), 0 } |
| 112 | }; |
| 113 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 114 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
| 115 | static int xfs_uuid_table_size; |
| 116 | static uuid_t *xfs_uuid_table; |
| 117 | |
| 118 | /* |
| 119 | * See if the UUID is unique among mounted XFS filesystems. |
| 120 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. |
| 121 | */ |
| 122 | STATIC int |
| 123 | xfs_uuid_mount( |
| 124 | struct xfs_mount *mp) |
| 125 | { |
| 126 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 127 | int hole, i; |
| 128 | |
| 129 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 130 | return 0; |
| 131 | |
| 132 | if (uuid_is_nil(uuid)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 133 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 134 | return XFS_ERROR(EINVAL); |
| 135 | } |
| 136 | |
| 137 | mutex_lock(&xfs_uuid_table_mutex); |
| 138 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { |
| 139 | if (uuid_is_nil(&xfs_uuid_table[i])) { |
| 140 | hole = i; |
| 141 | continue; |
| 142 | } |
| 143 | if (uuid_equal(uuid, &xfs_uuid_table[i])) |
| 144 | goto out_duplicate; |
| 145 | } |
| 146 | |
| 147 | if (hole < 0) { |
| 148 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, |
| 149 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), |
| 150 | xfs_uuid_table_size * sizeof(*xfs_uuid_table), |
| 151 | KM_SLEEP); |
| 152 | hole = xfs_uuid_table_size++; |
| 153 | } |
| 154 | xfs_uuid_table[hole] = *uuid; |
| 155 | mutex_unlock(&xfs_uuid_table_mutex); |
| 156 | |
| 157 | return 0; |
| 158 | |
| 159 | out_duplicate: |
| 160 | mutex_unlock(&xfs_uuid_table_mutex); |
Mitsuo Hayasaka | 021000e | 2012-01-13 05:58:39 +0000 | [diff] [blame] | 161 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 162 | return XFS_ERROR(EINVAL); |
| 163 | } |
| 164 | |
| 165 | STATIC void |
| 166 | xfs_uuid_unmount( |
| 167 | struct xfs_mount *mp) |
| 168 | { |
| 169 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 170 | int i; |
| 171 | |
| 172 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 173 | return; |
| 174 | |
| 175 | mutex_lock(&xfs_uuid_table_mutex); |
| 176 | for (i = 0; i < xfs_uuid_table_size; i++) { |
| 177 | if (uuid_is_nil(&xfs_uuid_table[i])) |
| 178 | continue; |
| 179 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) |
| 180 | continue; |
| 181 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); |
| 182 | break; |
| 183 | } |
| 184 | ASSERT(i < xfs_uuid_table_size); |
| 185 | mutex_unlock(&xfs_uuid_table_mutex); |
| 186 | } |
| 187 | |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 190 | * Reference counting access wrappers to the perag structures. |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 191 | * Because we never free per-ag structures, the only thing we |
| 192 | * have to protect against changes is the tree structure itself. |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 193 | */ |
| 194 | struct xfs_perag * |
| 195 | xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno) |
| 196 | { |
| 197 | struct xfs_perag *pag; |
| 198 | int ref = 0; |
| 199 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 200 | rcu_read_lock(); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 201 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); |
| 202 | if (pag) { |
| 203 | ASSERT(atomic_read(&pag->pag_ref) >= 0); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 204 | ref = atomic_inc_return(&pag->pag_ref); |
| 205 | } |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 206 | rcu_read_unlock(); |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 207 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
| 208 | return pag; |
| 209 | } |
| 210 | |
Dave Chinner | 65d0f20 | 2010-09-24 18:40:15 +1000 | [diff] [blame] | 211 | /* |
| 212 | * search from @first to find the next perag with the given tag set. |
| 213 | */ |
| 214 | struct xfs_perag * |
| 215 | xfs_perag_get_tag( |
| 216 | struct xfs_mount *mp, |
| 217 | xfs_agnumber_t first, |
| 218 | int tag) |
| 219 | { |
| 220 | struct xfs_perag *pag; |
| 221 | int found; |
| 222 | int ref; |
| 223 | |
| 224 | rcu_read_lock(); |
| 225 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, |
| 226 | (void **)&pag, first, 1, tag); |
| 227 | if (found <= 0) { |
| 228 | rcu_read_unlock(); |
| 229 | return NULL; |
| 230 | } |
| 231 | ref = atomic_inc_return(&pag->pag_ref); |
| 232 | rcu_read_unlock(); |
| 233 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); |
| 234 | return pag; |
| 235 | } |
| 236 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 237 | void |
| 238 | xfs_perag_put(struct xfs_perag *pag) |
| 239 | { |
| 240 | int ref; |
| 241 | |
| 242 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
| 243 | ref = atomic_dec_return(&pag->pag_ref); |
| 244 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); |
| 245 | } |
| 246 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 247 | STATIC void |
| 248 | __xfs_free_perag( |
| 249 | struct rcu_head *head) |
| 250 | { |
| 251 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); |
| 252 | |
| 253 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
| 254 | kmem_free(pag); |
| 255 | } |
| 256 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 257 | /* |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 258 | * Free up the per-ag resources associated with the mount structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | */ |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 260 | STATIC void |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 261 | xfs_free_perag( |
Christoph Hellwig | 745f691 | 2007-08-30 17:20:39 +1000 | [diff] [blame] | 262 | xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 264 | xfs_agnumber_t agno; |
| 265 | struct xfs_perag *pag; |
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 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| 268 | spin_lock(&mp->m_perag_lock); |
| 269 | pag = radix_tree_delete(&mp->m_perag_tree, agno); |
| 270 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 271 | ASSERT(pag); |
Dave Chinner | f83282a | 2010-11-08 08:55:04 +0000 | [diff] [blame] | 272 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 273 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 277 | /* |
| 278 | * Check size of device based on the (data/realtime) block count. |
| 279 | * Note: this check is used by the growfs code as well as mount. |
| 280 | */ |
| 281 | int |
| 282 | xfs_sb_validate_fsb_count( |
| 283 | xfs_sb_t *sbp, |
| 284 | __uint64_t nblocks) |
| 285 | { |
| 286 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); |
| 287 | ASSERT(sbp->sb_blocklog >= BBSHIFT); |
| 288 | |
| 289 | #if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ |
| 290 | if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 291 | return EFBIG; |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 292 | #else /* Limited by UINT_MAX of sectors */ |
| 293 | if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_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 | #endif |
| 296 | return 0; |
| 297 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
| 299 | /* |
| 300 | * Check the validity of the SB found. |
| 301 | */ |
| 302 | STATIC int |
| 303 | xfs_mount_validate_sb( |
| 304 | xfs_mount_t *mp, |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 305 | xfs_sb_t *sbp, |
| 306 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 308 | int loud = !(flags & XFS_MFSI_QUIET); |
| 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* |
| 311 | * If the log device and data device have the |
| 312 | * same device number, the log is internal. |
| 313 | * Consequently, the sb_logstart should be non-zero. If |
| 314 | * we have a zero sb_logstart in this case, we may be trying to mount |
| 315 | * a volume filesystem in a non-volume manner. |
| 316 | */ |
| 317 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 318 | if (loud) |
| 319 | xfs_warn(mp, "bad magic number"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | return XFS_ERROR(EWRONGFS); |
| 321 | } |
| 322 | |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 323 | if (!xfs_sb_good_version(sbp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 324 | if (loud) |
| 325 | xfs_warn(mp, "bad version"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | return XFS_ERROR(EWRONGFS); |
| 327 | } |
| 328 | |
| 329 | if (unlikely( |
| 330 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 331 | if (loud) |
| 332 | xfs_warn(mp, |
| 333 | "filesystem is marked as having an external log; " |
| 334 | "specify logdev on the mount command line."); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 335 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | if (unlikely( |
| 339 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 340 | if (loud) |
| 341 | xfs_warn(mp, |
| 342 | "filesystem is marked as having an internal log; " |
| 343 | "do not specify logdev on the mount command line."); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 344 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 348 | * More sanity checking. Most of these were stolen directly from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | * xfs_repair. |
| 350 | */ |
| 351 | if (unlikely( |
| 352 | sbp->sb_agcount <= 0 || |
| 353 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || |
| 354 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || |
| 355 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || |
| 356 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 357 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || |
| 359 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || |
| 360 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || |
| 361 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 362 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
| 364 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || |
Nathan Scott | 9f989c9 | 2006-03-14 13:29:32 +1100 | [diff] [blame] | 365 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || |
| 366 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || |
Olaf Weber | 2ac00af | 2009-04-17 16:12:45 -0500 | [diff] [blame] | 367 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || |
Nathan Scott | 9f989c9 | 2006-03-14 13:29:32 +1100 | [diff] [blame] | 368 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || |
| 370 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 371 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || |
| 372 | sbp->sb_dblocks == 0 || |
| 373 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || |
| 374 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 375 | if (loud) |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 376 | XFS_CORRUPTION_ERROR("SB sanity check failed", |
| 377 | XFS_ERRLEVEL_LOW, mp, sbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return XFS_ERROR(EFSCORRUPTED); |
| 379 | } |
| 380 | |
Lachlan McIlroy | 2edbddd | 2008-06-27 13:34:34 +1000 | [diff] [blame] | 381 | /* |
| 382 | * Until this is fixed only page-sized or smaller data blocks work. |
| 383 | */ |
| 384 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 385 | if (loud) { |
| 386 | xfs_warn(mp, |
| 387 | "File system with blocksize %d bytes. " |
| 388 | "Only pagesize (%ld) or less will currently work.", |
| 389 | sbp->sb_blocksize, PAGE_SIZE); |
| 390 | } |
Lachlan McIlroy | 2edbddd | 2008-06-27 13:34:34 +1000 | [diff] [blame] | 391 | return XFS_ERROR(ENOSYS); |
| 392 | } |
| 393 | |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 394 | /* |
| 395 | * Currently only very few inode sizes are supported. |
| 396 | */ |
| 397 | switch (sbp->sb_inodesize) { |
| 398 | case 256: |
| 399 | case 512: |
| 400 | case 1024: |
| 401 | case 2048: |
| 402 | break; |
| 403 | default: |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 404 | if (loud) |
| 405 | xfs_warn(mp, "inode size of %d bytes not supported", |
| 406 | sbp->sb_inodesize); |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 407 | return XFS_ERROR(ENOSYS); |
| 408 | } |
| 409 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 410 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || |
| 411 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 412 | if (loud) |
| 413 | xfs_warn(mp, |
| 414 | "file system too large to be mounted on this system."); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 415 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | if (unlikely(sbp->sb_inprogress)) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 419 | if (loud) |
| 420 | xfs_warn(mp, "file system busy"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return XFS_ERROR(EFSCORRUPTED); |
| 422 | } |
| 423 | |
| 424 | /* |
Nathan Scott | de20614 | 2005-05-05 13:24:13 -0700 | [diff] [blame] | 425 | * Version 1 directory format has never worked on Linux. |
| 426 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 427 | if (unlikely(!xfs_sb_version_hasdirv2(sbp))) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 428 | if (loud) |
| 429 | xfs_warn(mp, |
| 430 | "file system using version 1 directory format"); |
Nathan Scott | de20614 | 2005-05-05 13:24:13 -0700 | [diff] [blame] | 431 | return XFS_ERROR(ENOSYS); |
| 432 | } |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return 0; |
| 435 | } |
| 436 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 437 | int |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 438 | xfs_initialize_perag( |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 439 | xfs_mount_t *mp, |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 440 | xfs_agnumber_t agcount, |
| 441 | xfs_agnumber_t *maxagi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 443 | xfs_agnumber_t index; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 444 | xfs_agnumber_t first_initialised = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | xfs_perag_t *pag; |
| 446 | xfs_agino_t agino; |
| 447 | xfs_ino_t ino; |
| 448 | xfs_sb_t *sbp = &mp->m_sb; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 449 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 451 | /* |
| 452 | * Walk the current per-ag tree so we don't try to initialise AGs |
| 453 | * that already exist (growfs case). Allocate and insert all the |
| 454 | * AGs we don't find ready for initialisation. |
| 455 | */ |
| 456 | for (index = 0; index < agcount; index++) { |
| 457 | pag = xfs_perag_get(mp, index); |
| 458 | if (pag) { |
| 459 | xfs_perag_put(pag); |
| 460 | continue; |
| 461 | } |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 462 | if (!first_initialised) |
| 463 | first_initialised = index; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 464 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 465 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
| 466 | if (!pag) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 467 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 468 | pag->pag_agno = index; |
| 469 | pag->pag_mount = mp; |
Dave Chinner | 1a427ab | 2010-12-16 17:08:41 +1100 | [diff] [blame] | 470 | spin_lock_init(&pag->pag_ici_lock); |
Dave Chinner | 69b491c | 2010-09-27 11:09:51 +1000 | [diff] [blame] | 471 | mutex_init(&pag->pag_ici_reclaim_lock); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 472 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
Dave Chinner | 74f75a0 | 2010-09-24 19:59:04 +1000 | [diff] [blame] | 473 | spin_lock_init(&pag->pag_buf_lock); |
| 474 | pag->pag_buf_tree = RB_ROOT; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 475 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 476 | if (radix_tree_preload(GFP_NOFS)) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 477 | goto out_unwind; |
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 | spin_lock(&mp->m_perag_lock); |
| 480 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { |
| 481 | BUG(); |
| 482 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 483 | radix_tree_preload_end(); |
| 484 | error = -EEXIST; |
| 485 | goto out_unwind; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 486 | } |
| 487 | spin_unlock(&mp->m_perag_lock); |
| 488 | radix_tree_preload_end(); |
| 489 | } |
| 490 | |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 491 | /* |
| 492 | * If we mount with the inode64 option, or no inode overflows |
| 493 | * the legacy 32-bit address space clear the inode32 option. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | */ |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 495 | agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); |
| 496 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); |
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 | if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) |
| 499 | mp->m_flags |= XFS_MOUNT_32BITINODES; |
| 500 | else |
| 501 | mp->m_flags &= ~XFS_MOUNT_32BITINODES; |
| 502 | |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 503 | if (mp->m_flags & XFS_MOUNT_32BITINODES) |
| 504 | index = xfs_set_inode32(mp); |
| 505 | else |
| 506 | index = xfs_set_inode64(mp); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 507 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 508 | if (maxagi) |
| 509 | *maxagi = index; |
| 510 | return 0; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 511 | |
| 512 | out_unwind: |
| 513 | kmem_free(pag); |
| 514 | for (; index > first_initialised; index--) { |
| 515 | pag = radix_tree_delete(&mp->m_perag_tree, index); |
| 516 | kmem_free(pag); |
| 517 | } |
| 518 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 521 | void |
| 522 | xfs_sb_from_disk( |
Chandra Seetharaman | 6bd92a2 | 2012-01-23 17:31:37 +0000 | [diff] [blame] | 523 | struct xfs_mount *mp, |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 524 | xfs_dsb_t *from) |
| 525 | { |
Chandra Seetharaman | 6bd92a2 | 2012-01-23 17:31:37 +0000 | [diff] [blame] | 526 | struct xfs_sb *to = &mp->m_sb; |
| 527 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 528 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); |
| 529 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); |
| 530 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); |
| 531 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); |
| 532 | to->sb_rextents = be64_to_cpu(from->sb_rextents); |
| 533 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); |
| 534 | to->sb_logstart = be64_to_cpu(from->sb_logstart); |
| 535 | to->sb_rootino = be64_to_cpu(from->sb_rootino); |
| 536 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); |
| 537 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); |
| 538 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); |
| 539 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); |
| 540 | to->sb_agcount = be32_to_cpu(from->sb_agcount); |
| 541 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); |
| 542 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); |
| 543 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); |
| 544 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); |
| 545 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); |
| 546 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); |
| 547 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); |
| 548 | to->sb_blocklog = from->sb_blocklog; |
| 549 | to->sb_sectlog = from->sb_sectlog; |
| 550 | to->sb_inodelog = from->sb_inodelog; |
| 551 | to->sb_inopblog = from->sb_inopblog; |
| 552 | to->sb_agblklog = from->sb_agblklog; |
| 553 | to->sb_rextslog = from->sb_rextslog; |
| 554 | to->sb_inprogress = from->sb_inprogress; |
| 555 | to->sb_imax_pct = from->sb_imax_pct; |
| 556 | to->sb_icount = be64_to_cpu(from->sb_icount); |
| 557 | to->sb_ifree = be64_to_cpu(from->sb_ifree); |
| 558 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); |
| 559 | to->sb_frextents = be64_to_cpu(from->sb_frextents); |
| 560 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); |
| 561 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); |
| 562 | to->sb_qflags = be16_to_cpu(from->sb_qflags); |
| 563 | to->sb_flags = from->sb_flags; |
| 564 | to->sb_shared_vn = from->sb_shared_vn; |
| 565 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); |
| 566 | to->sb_unit = be32_to_cpu(from->sb_unit); |
| 567 | to->sb_width = be32_to_cpu(from->sb_width); |
| 568 | to->sb_dirblklog = from->sb_dirblklog; |
| 569 | to->sb_logsectlog = from->sb_logsectlog; |
| 570 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); |
| 571 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); |
| 572 | to->sb_features2 = be32_to_cpu(from->sb_features2); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 573 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 574 | } |
| 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | /* |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 577 | * Copy in core superblock to ondisk one. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | * |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 579 | * The fields argument is mask of superblock fields to copy. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | */ |
| 581 | void |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 582 | xfs_sb_to_disk( |
| 583 | xfs_dsb_t *to, |
| 584 | xfs_sb_t *from, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | __int64_t fields) |
| 586 | { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 587 | xfs_caddr_t to_ptr = (xfs_caddr_t)to; |
| 588 | xfs_caddr_t from_ptr = (xfs_caddr_t)from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | xfs_sb_field_t f; |
| 590 | int first; |
| 591 | int size; |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | ASSERT(fields); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | if (!fields) |
| 595 | return; |
| 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | while (fields) { |
| 598 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); |
| 599 | first = xfs_sb_info[f].offset; |
| 600 | size = xfs_sb_info[f + 1].offset - first; |
| 601 | |
| 602 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); |
| 603 | |
| 604 | if (size == 1 || xfs_sb_info[f].type == 1) { |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 605 | memcpy(to_ptr + first, from_ptr + first, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } else { |
| 607 | switch (size) { |
| 608 | case 2: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 609 | *(__be16 *)(to_ptr + first) = |
| 610 | cpu_to_be16(*(__u16 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | break; |
| 612 | case 4: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 613 | *(__be32 *)(to_ptr + first) = |
| 614 | cpu_to_be32(*(__u32 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | break; |
| 616 | case 8: |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 617 | *(__be64 *)(to_ptr + first) = |
| 618 | cpu_to_be64(*(__u64 *)(from_ptr + first)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | break; |
| 620 | default: |
| 621 | ASSERT(0); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | fields &= ~(1LL << f); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * xfs_readsb |
| 631 | * |
| 632 | * Does the initial read of the superblock. |
| 633 | */ |
| 634 | int |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 635 | xfs_readsb(xfs_mount_t *mp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | { |
| 637 | unsigned int sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | xfs_buf_t *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | int error; |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 640 | int loud = !(flags & XFS_MFSI_QUIET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
| 642 | ASSERT(mp->m_sb_bp == NULL); |
| 643 | ASSERT(mp->m_ddev_targp != NULL); |
| 644 | |
| 645 | /* |
| 646 | * Allocate a (locked) buffer to hold the superblock. |
| 647 | * This will be kept around at all times to optimize |
| 648 | * access to the superblock. |
| 649 | */ |
| 650 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 652 | reread: |
Dave Chinner | e70b73f | 2012-04-23 15:58:49 +1000 | [diff] [blame] | 653 | bp = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
| 654 | BTOBB(sector_size), 0); |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 655 | if (!bp) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 656 | if (loud) |
| 657 | xfs_warn(mp, "SB buffer read failed"); |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 658 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* |
| 662 | * Initialize the mount structure from the superblock. |
| 663 | * But first do some basic consistency checking. |
| 664 | */ |
Chandra Seetharaman | 6bd92a2 | 2012-01-23 17:31:37 +0000 | [diff] [blame] | 665 | xfs_sb_from_disk(mp, XFS_BUF_TO_SBP(bp)); |
Nathan Scott | 764d1f8 | 2006-03-31 13:04:17 +1000 | [diff] [blame] | 666 | error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | if (error) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 668 | if (loud) |
| 669 | xfs_warn(mp, "SB validate failed"); |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 670 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | /* |
| 674 | * We must be able to do sector-sized and sector-aligned IO. |
| 675 | */ |
| 676 | if (sector_size > mp->m_sb.sb_sectsize) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 677 | if (loud) |
| 678 | xfs_warn(mp, "device supports %u byte sectors (not %u)", |
| 679 | sector_size, mp->m_sb.sb_sectsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | error = ENOSYS; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 681 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | /* |
| 685 | * If device sector size is smaller than the superblock size, |
| 686 | * re-read the superblock so the buffer is correctly sized. |
| 687 | */ |
| 688 | if (sector_size < mp->m_sb.sb_sectsize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | xfs_buf_relse(bp); |
| 690 | sector_size = mp->m_sb.sb_sectsize; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 691 | goto reread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 694 | /* Initialize per-cpu counters */ |
| 695 | xfs_icsb_reinit_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | mp->m_sb_bp = bp; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 698 | xfs_buf_unlock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | return 0; |
| 700 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 701 | release_buf: |
| 702 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | return error; |
| 704 | } |
| 705 | |
| 706 | |
| 707 | /* |
| 708 | * xfs_mount_common |
| 709 | * |
| 710 | * Mount initialization code establishing various mount |
| 711 | * fields from the superblock associated with the given |
| 712 | * mount structure |
| 713 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 714 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) |
| 716 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | mp->m_agfrotor = mp->m_agirotor = 0; |
Eric Sandeen | 007c61c | 2007-10-11 17:43:56 +1000 | [diff] [blame] | 718 | spin_lock_init(&mp->m_agirotor_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | mp->m_maxagi = mp->m_sb.sb_agcount; |
| 720 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; |
| 721 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; |
| 722 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; |
| 723 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; |
| 724 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | mp->m_blockmask = sbp->sb_blocksize - 1; |
| 726 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; |
| 727 | mp->m_blockwmask = mp->m_blockwsize - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 729 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 730 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 731 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; |
| 732 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; |
| 733 | |
| 734 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 735 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 736 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; |
| 737 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; |
| 738 | |
| 739 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); |
| 740 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); |
| 741 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; |
| 742 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
| 744 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
| 745 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, |
| 746 | sbp->sb_inopblock); |
| 747 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; |
| 748 | } |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 749 | |
| 750 | /* |
| 751 | * xfs_initialize_perag_data |
| 752 | * |
| 753 | * Read in each per-ag structure so we can count up the number of |
| 754 | * allocated inodes, free inodes and used filesystem blocks as this |
| 755 | * information is no longer persistent in the superblock. Once we have |
| 756 | * this information, write it into the in-core superblock structure. |
| 757 | */ |
| 758 | STATIC int |
| 759 | xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount) |
| 760 | { |
| 761 | xfs_agnumber_t index; |
| 762 | xfs_perag_t *pag; |
| 763 | xfs_sb_t *sbp = &mp->m_sb; |
| 764 | uint64_t ifree = 0; |
| 765 | uint64_t ialloc = 0; |
| 766 | uint64_t bfree = 0; |
| 767 | uint64_t bfreelst = 0; |
| 768 | uint64_t btree = 0; |
| 769 | int error; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 770 | |
| 771 | for (index = 0; index < agcount; index++) { |
| 772 | /* |
| 773 | * read the agf, then the agi. This gets us |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 774 | * all the information we need and populates the |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 775 | * per-ag structures for us. |
| 776 | */ |
| 777 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); |
| 778 | if (error) |
| 779 | return error; |
| 780 | |
| 781 | error = xfs_ialloc_pagi_init(mp, NULL, index); |
| 782 | if (error) |
| 783 | return error; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 784 | pag = xfs_perag_get(mp, index); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 785 | ifree += pag->pagi_freecount; |
| 786 | ialloc += pag->pagi_count; |
| 787 | bfree += pag->pagf_freeblks; |
| 788 | bfreelst += pag->pagf_flcount; |
| 789 | btree += pag->pagf_btreeblks; |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 790 | xfs_perag_put(pag); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 791 | } |
| 792 | /* |
| 793 | * Overwrite incore superblock counters with just-read data |
| 794 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 795 | spin_lock(&mp->m_sb_lock); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 796 | sbp->sb_ifree = ifree; |
| 797 | sbp->sb_icount = ialloc; |
| 798 | sbp->sb_fdblocks = bfree + bfreelst + btree; |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 799 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 800 | |
| 801 | /* Fixup the per-cpu counters as well. */ |
| 802 | xfs_icsb_reinit_counters(mp); |
| 803 | |
| 804 | return 0; |
| 805 | } |
| 806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 808 | * Update alignment values based on mount options and sb values |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 810 | STATIC int |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 811 | xfs_update_alignment(xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | xfs_sb_t *sbp = &(mp->m_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 815 | if (mp->m_dalign) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | /* |
| 817 | * If stripe unit and stripe width are not multiples |
| 818 | * of the fs blocksize turn off alignment. |
| 819 | */ |
| 820 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || |
| 821 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { |
| 822 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 823 | xfs_warn(mp, "alignment check failed: " |
| 824 | "(sunit/swidth vs. blocksize)"); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 825 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | mp->m_dalign = mp->m_swidth = 0; |
| 828 | } else { |
| 829 | /* |
| 830 | * Convert the stripe unit and width to FSBs. |
| 831 | */ |
| 832 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); |
| 833 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { |
| 834 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 835 | xfs_warn(mp, "alignment check failed: " |
| 836 | "(sunit/swidth vs. ag size)"); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 837 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 839 | xfs_warn(mp, |
| 840 | "stripe alignment turned off: sunit(%d)/swidth(%d) " |
| 841 | "incompatible with agsize(%d)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | mp->m_dalign, mp->m_swidth, |
| 843 | sbp->sb_agblocks); |
| 844 | |
| 845 | mp->m_dalign = 0; |
| 846 | mp->m_swidth = 0; |
| 847 | } else if (mp->m_dalign) { |
| 848 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); |
| 849 | } else { |
| 850 | if (mp->m_flags & XFS_MOUNT_RETERR) { |
Eric Sandeen | c0e090c | 2011-05-20 21:52:17 +0000 | [diff] [blame] | 851 | xfs_warn(mp, "alignment check failed: " |
| 852 | "sunit(%d) less than bsize(%d)", |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 853 | mp->m_dalign, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | mp->m_blockmask +1); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 855 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | mp->m_swidth = 0; |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | * Update superblock with new values |
| 863 | * and log changes |
| 864 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 865 | if (xfs_sb_version_hasdalign(sbp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | if (sbp->sb_unit != mp->m_dalign) { |
| 867 | sbp->sb_unit = mp->m_dalign; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 868 | mp->m_update_flags |= XFS_SB_UNIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } |
| 870 | if (sbp->sb_width != mp->m_swidth) { |
| 871 | sbp->sb_width = mp->m_swidth; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 872 | mp->m_update_flags |= XFS_SB_WIDTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } |
| 874 | } |
| 875 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 876 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | mp->m_dalign = sbp->sb_unit; |
| 878 | mp->m_swidth = sbp->sb_width; |
| 879 | } |
| 880 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 881 | return 0; |
| 882 | } |
| 883 | |
| 884 | /* |
| 885 | * Set the maximum inode count for this filesystem |
| 886 | */ |
| 887 | STATIC void |
| 888 | xfs_set_maxicount(xfs_mount_t *mp) |
| 889 | { |
| 890 | xfs_sb_t *sbp = &(mp->m_sb); |
| 891 | __uint64_t icount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | if (sbp->sb_imax_pct) { |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 894 | /* |
| 895 | * Make sure the maximum inode count is a multiple |
| 896 | * of the units we allocate inodes in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| 899 | do_div(icount, 100); |
| 900 | do_div(icount, mp->m_ialloc_blks); |
| 901 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << |
| 902 | sbp->sb_inopblog; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 903 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | mp->m_maxicount = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 906 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 908 | /* |
| 909 | * Set the default minimum read and write sizes unless |
| 910 | * already specified in a mount option. |
| 911 | * We use smaller I/O sizes when the file system |
| 912 | * is being used for NFS service (wsync mount option). |
| 913 | */ |
| 914 | STATIC void |
| 915 | xfs_set_rw_sizes(xfs_mount_t *mp) |
| 916 | { |
| 917 | xfs_sb_t *sbp = &(mp->m_sb); |
| 918 | int readio_log, writeio_log; |
| 919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
| 921 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 922 | readio_log = XFS_WSYNC_READIO_LOG; |
| 923 | writeio_log = XFS_WSYNC_WRITEIO_LOG; |
| 924 | } else { |
| 925 | readio_log = XFS_READIO_LOG_LARGE; |
| 926 | writeio_log = XFS_WRITEIO_LOG_LARGE; |
| 927 | } |
| 928 | } else { |
| 929 | readio_log = mp->m_readio_log; |
| 930 | writeio_log = mp->m_writeio_log; |
| 931 | } |
| 932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | if (sbp->sb_blocklog > readio_log) { |
| 934 | mp->m_readio_log = sbp->sb_blocklog; |
| 935 | } else { |
| 936 | mp->m_readio_log = readio_log; |
| 937 | } |
| 938 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); |
| 939 | if (sbp->sb_blocklog > writeio_log) { |
| 940 | mp->m_writeio_log = sbp->sb_blocklog; |
| 941 | } else { |
| 942 | mp->m_writeio_log = writeio_log; |
| 943 | } |
| 944 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 945 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 947 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 948 | * precalculate the low space thresholds for dynamic speculative preallocation. |
| 949 | */ |
| 950 | void |
| 951 | xfs_set_low_space_thresholds( |
| 952 | struct xfs_mount *mp) |
| 953 | { |
| 954 | int i; |
| 955 | |
| 956 | for (i = 0; i < XFS_LOWSP_MAX; i++) { |
| 957 | __uint64_t space = mp->m_sb.sb_dblocks; |
| 958 | |
| 959 | do_div(space, 100); |
| 960 | mp->m_low_space[i] = space * (i + 1); |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | |
| 965 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 966 | * Set whether we're using inode alignment. |
| 967 | */ |
| 968 | STATIC void |
| 969 | xfs_set_inoalignment(xfs_mount_t *mp) |
| 970 | { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 971 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | mp->m_sb.sb_inoalignmt >= |
| 973 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) |
| 974 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; |
| 975 | else |
| 976 | mp->m_inoalign_mask = 0; |
| 977 | /* |
| 978 | * If we are using stripe alignment, check whether |
| 979 | * the stripe unit is a multiple of the inode alignment |
| 980 | */ |
| 981 | if (mp->m_dalign && mp->m_inoalign_mask && |
| 982 | !(mp->m_dalign & mp->m_inoalign_mask)) |
| 983 | mp->m_sinoalign = mp->m_dalign; |
| 984 | else |
| 985 | mp->m_sinoalign = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | /* |
| 989 | * Check that the data (and log if separate) are an ok size. |
| 990 | */ |
| 991 | STATIC int |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 992 | xfs_check_sizes(xfs_mount_t *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 993 | { |
| 994 | xfs_buf_t *bp; |
| 995 | xfs_daddr_t d; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
| 998 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 999 | xfs_warn(mp, "filesystem size mismatch detected"); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 1000 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } |
Dave Chinner | e70b73f | 2012-04-23 15:58:49 +1000 | [diff] [blame] | 1002 | bp = xfs_buf_read_uncached(mp->m_ddev_targp, |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1003 | d - XFS_FSS_TO_BB(mp, 1), |
Dave Chinner | e70b73f | 2012-04-23 15:58:49 +1000 | [diff] [blame] | 1004 | XFS_FSS_TO_BB(mp, 1), 0); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1005 | if (!bp) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1006 | xfs_warn(mp, "last sector read failed"); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1007 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1009 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1011 | if (mp->m_logdev_targp != mp->m_ddev_targp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); |
| 1013 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1014 | xfs_warn(mp, "log size mismatch detected"); |
Eric Sandeen | 657a4cf | 2010-04-30 03:42:49 +0000 | [diff] [blame] | 1015 | return XFS_ERROR(EFBIG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
Dave Chinner | e70b73f | 2012-04-23 15:58:49 +1000 | [diff] [blame] | 1017 | bp = xfs_buf_read_uncached(mp->m_logdev_targp, |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1018 | d - XFS_FSB_TO_BB(mp, 1), |
Dave Chinner | e70b73f | 2012-04-23 15:58:49 +1000 | [diff] [blame] | 1019 | XFS_FSB_TO_BB(mp, 1), 0); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1020 | if (!bp) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1021 | xfs_warn(mp, "log device read failed"); |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1022 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1024 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1026 | return 0; |
| 1027 | } |
| 1028 | |
| 1029 | /* |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1030 | * Clear the quotaflags in memory and in the superblock. |
| 1031 | */ |
| 1032 | int |
| 1033 | xfs_mount_reset_sbqflags( |
| 1034 | struct xfs_mount *mp) |
| 1035 | { |
| 1036 | int error; |
| 1037 | struct xfs_trans *tp; |
| 1038 | |
| 1039 | mp->m_qflags = 0; |
| 1040 | |
| 1041 | /* |
| 1042 | * It is OK to look at sb_qflags here in mount path, |
| 1043 | * without m_sb_lock. |
| 1044 | */ |
| 1045 | if (mp->m_sb.sb_qflags == 0) |
| 1046 | return 0; |
| 1047 | spin_lock(&mp->m_sb_lock); |
| 1048 | mp->m_sb.sb_qflags = 0; |
| 1049 | spin_unlock(&mp->m_sb_lock); |
| 1050 | |
| 1051 | /* |
| 1052 | * If the fs is readonly, let the incore superblock run |
| 1053 | * with quotas off but don't flush the update out to disk |
| 1054 | */ |
| 1055 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1056 | return 0; |
| 1057 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1058 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); |
| 1059 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1060 | XFS_DEFAULT_LOG_COUNT); |
| 1061 | if (error) { |
| 1062 | xfs_trans_cancel(tp, 0); |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 1063 | xfs_alert(mp, "%s: Superblock update failed!", __func__); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1064 | return error; |
| 1065 | } |
| 1066 | |
| 1067 | xfs_mod_sb(tp, XFS_SB_QFLAGS); |
| 1068 | return xfs_trans_commit(tp, 0); |
| 1069 | } |
| 1070 | |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1071 | __uint64_t |
| 1072 | xfs_default_resblks(xfs_mount_t *mp) |
| 1073 | { |
| 1074 | __uint64_t resblks; |
| 1075 | |
| 1076 | /* |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1077 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
| 1078 | * smaller. This is intended to cover concurrent allocation |
| 1079 | * transactions when we initially hit enospc. These each require a 4 |
| 1080 | * block reservation. Hence by default we cover roughly 2000 concurrent |
| 1081 | * allocation reservations. |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1082 | */ |
| 1083 | resblks = mp->m_sb.sb_dblocks; |
| 1084 | do_div(resblks, 20); |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1085 | resblks = min_t(__uint64_t, resblks, 8192); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1086 | return resblks; |
| 1087 | } |
| 1088 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1089 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1090 | * This function does the following on an initial mount of a file system: |
| 1091 | * - reads the superblock from disk and init the mount struct |
| 1092 | * - if we're a 32-bit kernel, do a size check on the superblock |
| 1093 | * so we don't mount terabyte filesystems |
| 1094 | * - init mount struct realtime fields |
| 1095 | * - allocate inode hash table for fs |
| 1096 | * - init directory manager |
| 1097 | * - perform recovery and init the log manager |
| 1098 | */ |
| 1099 | int |
| 1100 | xfs_mountfs( |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1101 | xfs_mount_t *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1102 | { |
| 1103 | xfs_sb_t *sbp = &(mp->m_sb); |
| 1104 | xfs_inode_t *rip; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1105 | __uint64_t resblks; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1106 | uint quotamount = 0; |
| 1107 | uint quotaflags = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1108 | int error = 0; |
| 1109 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1110 | xfs_mount_common(mp, sbp); |
| 1111 | |
| 1112 | /* |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1113 | * Check for a mismatched features2 values. Older kernels |
| 1114 | * read & wrote into the wrong sb offset for sb_features2 |
| 1115 | * on some platforms due to xfs_sb_t not being 64bit size aligned |
| 1116 | * when sb_features2 was added, which made older superblock |
| 1117 | * reading/writing routines swap it as a 64-bit value. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1118 | * |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1119 | * For backwards compatibility, we make both slots equal. |
| 1120 | * |
| 1121 | * If we detect a mismatched field, we OR the set bits into the |
| 1122 | * existing features2 field in case it has already been modified; we |
| 1123 | * don't want to lose any features. We then update the bad location |
| 1124 | * with the ORed value so that older kernels will see any features2 |
| 1125 | * flags, and mark the two fields as needing updates once the |
| 1126 | * transaction subsystem is online. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1127 | */ |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1128 | if (xfs_sb_has_mismatched_features2(sbp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1129 | xfs_warn(mp, "correcting sb_features alignment problem"); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1130 | sbp->sb_features2 |= sbp->sb_bad_features2; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1131 | sbp->sb_bad_features2 = sbp->sb_features2; |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1132 | mp->m_update_flags |= XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1133 | |
| 1134 | /* |
| 1135 | * Re-check for ATTR2 in case it was found in bad_features2 |
| 1136 | * slot. |
| 1137 | */ |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1138 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 1139 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1140 | mp->m_flags |= XFS_MOUNT_ATTR2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1141 | } |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 1142 | |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1143 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 1144 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { |
| 1145 | xfs_sb_version_removeattr2(&mp->m_sb); |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1146 | mp->m_update_flags |= XFS_SB_FEATURES2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 1147 | |
| 1148 | /* update sb_versionnum for the clearing of the morebits */ |
| 1149 | if (!sbp->sb_features2) |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1150 | mp->m_update_flags |= XFS_SB_VERSIONNUM; |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1154 | * Check if sb_agblocks is aligned at stripe boundary |
| 1155 | * If sb_agblocks is NOT aligned turn off m_dalign since |
| 1156 | * allocator alignment is within an ag, therefore ag has |
| 1157 | * to be aligned at stripe boundary. |
| 1158 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1159 | error = xfs_update_alignment(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1160 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1161 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1162 | |
| 1163 | xfs_alloc_compute_maxlevels(mp); |
| 1164 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); |
| 1165 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); |
| 1166 | xfs_ialloc_compute_maxlevels(mp); |
| 1167 | |
| 1168 | xfs_set_maxicount(mp); |
| 1169 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1170 | error = xfs_uuid_mount(mp); |
| 1171 | if (error) |
| 1172 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1173 | |
| 1174 | /* |
| 1175 | * Set the minimum read and write sizes |
| 1176 | */ |
| 1177 | xfs_set_rw_sizes(mp); |
| 1178 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 1179 | /* set the low space thresholds for dynamic preallocation */ |
| 1180 | xfs_set_low_space_thresholds(mp); |
| 1181 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1182 | /* |
| 1183 | * Set the inode cluster size. |
| 1184 | * This may still be overridden by the file system |
| 1185 | * block size if it is larger than the chosen cluster size. |
| 1186 | */ |
| 1187 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; |
| 1188 | |
| 1189 | /* |
| 1190 | * Set inode alignment fields |
| 1191 | */ |
| 1192 | xfs_set_inoalignment(mp); |
| 1193 | |
| 1194 | /* |
| 1195 | * Check that the data (and log if separate) are an ok size. |
| 1196 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1197 | error = xfs_check_sizes(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1198 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1199 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
| 1201 | /* |
| 1202 | * Initialize realtime fields in the mount structure |
| 1203 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1204 | error = xfs_rtmount_init(mp); |
| 1205 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1206 | xfs_warn(mp, "RT mount failed"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1207 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | |
| 1210 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | * Copies the low order bits of the timestamp and the randomly |
| 1212 | * set "sequence" number out of a UUID. |
| 1213 | */ |
| 1214 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); |
| 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
| 1217 | |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1218 | xfs_dir_mount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
| 1220 | /* |
| 1221 | * Initialize the attribute manager's entries. |
| 1222 | */ |
| 1223 | mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100; |
| 1224 | |
| 1225 | /* |
| 1226 | * Initialize the precomputed transaction reservations values. |
| 1227 | */ |
| 1228 | xfs_trans_init(mp); |
| 1229 | |
| 1230 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | * Allocate and initialize the per-ag data. |
| 1232 | */ |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1233 | spin_lock_init(&mp->m_perag_lock); |
Dave Chinner | 9b98b6f | 2010-05-27 01:58:13 +0000 | [diff] [blame] | 1234 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1235 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
| 1236 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1237 | xfs_warn(mp, "Failed per-ag init: %d", error); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1238 | goto out_remove_uuid; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 1239 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1241 | if (!sbp->sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1242 | xfs_warn(mp, "no log defined"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1243 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
| 1244 | error = XFS_ERROR(EFSCORRUPTED); |
| 1245 | goto out_free_perag; |
| 1246 | } |
| 1247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | /* |
| 1249 | * log's mount-time initialization. Perform 1st part recovery if needed |
| 1250 | */ |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1251 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
| 1252 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), |
| 1253 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); |
| 1254 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1255 | xfs_warn(mp, "log mount failed"); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 1256 | goto out_fail_wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | } |
| 1258 | |
| 1259 | /* |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1260 | * Now the log is mounted, we know if it was an unclean shutdown or |
| 1261 | * not. If it was, with the first phase of recovery has completed, we |
| 1262 | * have consistent AG blocks on disk. We have not recovered EFIs yet, |
| 1263 | * but they are recovered transactionally in the second recovery phase |
| 1264 | * later. |
| 1265 | * |
| 1266 | * Hence we can safely re-initialise incore superblock counters from |
| 1267 | * the per-ag data. These may not be correct if the filesystem was not |
| 1268 | * cleanly unmounted, so we need to wait for recovery to finish before |
| 1269 | * doing this. |
| 1270 | * |
| 1271 | * If the filesystem was cleanly unmounted, then we can trust the |
| 1272 | * values in the superblock to be correct and we don't need to do |
| 1273 | * anything here. |
| 1274 | * |
| 1275 | * If we are currently making the filesystem, the initialisation will |
| 1276 | * fail as the perag data is in an undefined state. |
| 1277 | */ |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1278 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
| 1279 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && |
| 1280 | !mp->m_sb.sb_inprogress) { |
| 1281 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1282 | if (error) |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 1283 | goto out_fail_wait; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1284 | } |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1285 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1286 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | * Get and sanity-check the root inode. |
| 1288 | * Save the pointer to it in the mount structure. |
| 1289 | */ |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 1290 | 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] | 1291 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1292 | xfs_warn(mp, "failed to read root inode"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1293 | goto out_log_dealloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | } |
| 1295 | |
| 1296 | ASSERT(rip != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 1298 | if (unlikely(!S_ISDIR(rip->i_d.di_mode))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1299 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
Nathan Scott | b657452 | 2006-06-09 15:29:40 +1000 | [diff] [blame] | 1300 | (unsigned long long)rip->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 1302 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, |
| 1303 | mp); |
| 1304 | error = XFS_ERROR(EFSCORRUPTED); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1305 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | } |
| 1307 | mp->m_rootip = rip; /* save it */ |
| 1308 | |
| 1309 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 1310 | |
| 1311 | /* |
| 1312 | * Initialize realtime inode pointers in the mount structure |
| 1313 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 1314 | error = xfs_rtmount_inodes(mp); |
| 1315 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | /* |
| 1317 | * Free up the root inode. |
| 1318 | */ |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1319 | xfs_warn(mp, "failed to read RT inodes"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1320 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | } |
| 1322 | |
| 1323 | /* |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1324 | * If this is a read-only mount defer the superblock updates until |
| 1325 | * the next remount into writeable mode. Otherwise we would never |
| 1326 | * perform the update e.g. for the root filesystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1328 | if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 1329 | error = xfs_mount_log_sb(mp, mp->m_update_flags); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1330 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1331 | xfs_warn(mp, "failed to write sb changes"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1332 | goto out_rtunmount; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1333 | } |
| 1334 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | |
| 1336 | /* |
| 1337 | * Initialise the XFS quota management subsystem for this mount |
| 1338 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1339 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
| 1340 | error = xfs_qm_newmount(mp, "amount, "aflags); |
| 1341 | if (error) |
| 1342 | goto out_rtunmount; |
| 1343 | } else { |
| 1344 | ASSERT(!XFS_IS_QUOTA_ON(mp)); |
| 1345 | |
| 1346 | /* |
| 1347 | * If a file system had quotas running earlier, but decided to |
| 1348 | * mount without -o uquota/pquota/gquota options, revoke the |
| 1349 | * quotachecked license. |
| 1350 | */ |
| 1351 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1352 | xfs_notice(mp, "resetting quota flags"); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1353 | error = xfs_mount_reset_sbqflags(mp); |
| 1354 | if (error) |
| 1355 | return error; |
| 1356 | } |
| 1357 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
| 1359 | /* |
| 1360 | * Finish recovering the file system. This part needed to be |
| 1361 | * delayed until after the root and real-time bitmap inodes |
| 1362 | * were consistently read in. |
| 1363 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 1364 | error = xfs_log_mount_finish(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1366 | xfs_warn(mp, "log mount finish failed"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1367 | goto out_rtunmount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | } |
| 1369 | |
| 1370 | /* |
| 1371 | * Complete the quota initialisation, post-log-replay component. |
| 1372 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1373 | if (quotamount) { |
| 1374 | ASSERT(mp->m_qflags == 0); |
| 1375 | mp->m_qflags = quotaflags; |
| 1376 | |
| 1377 | xfs_qm_mount_quotas(mp); |
| 1378 | } |
| 1379 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1380 | /* |
| 1381 | * Now we are mounted, reserve a small amount of unused space for |
| 1382 | * privileged transactions. This is needed so that transaction |
| 1383 | * space required for critical operations can dip into this pool |
| 1384 | * when at ENOSPC. This is needed for operations like create with |
| 1385 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations |
| 1386 | * are not allowed to use this reserved space. |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1387 | * |
| 1388 | * This may drive us straight to ENOSPC on mount, but that implies |
| 1389 | * we were already there on the last unmount. Warn if this occurs. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1390 | */ |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1391 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 1392 | resblks = xfs_default_resblks(mp); |
| 1393 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1394 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1395 | xfs_warn(mp, |
| 1396 | "Unable to allocate reserve blocks. Continuing without reserve pool."); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 1397 | } |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | return 0; |
| 1400 | |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1401 | out_rtunmount: |
| 1402 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1403 | out_rele_rip: |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 1404 | IRELE(rip); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1405 | out_log_dealloc: |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1406 | xfs_log_unmount(mp); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 1407 | out_fail_wait: |
| 1408 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) |
| 1409 | xfs_wait_buftarg(mp->m_logdev_targp); |
| 1410 | xfs_wait_buftarg(mp->m_ddev_targp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1411 | out_free_perag: |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1412 | xfs_free_perag(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1413 | out_remove_uuid: |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1414 | xfs_uuid_unmount(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 1415 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | return error; |
| 1417 | } |
| 1418 | |
| 1419 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | * This flushes out the inodes,dquots and the superblock, unmounts the |
| 1421 | * log and makes sure that incore structures are freed. |
| 1422 | */ |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 1423 | void |
| 1424 | xfs_unmountfs( |
| 1425 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | { |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 1427 | __uint64_t resblks; |
| 1428 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1430 | xfs_qm_unmount_quotas(mp); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1431 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | 77508ec | 2008-08-13 16:49:04 +1000 | [diff] [blame] | 1432 | IRELE(mp->m_rootip); |
| 1433 | |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1434 | /* |
| 1435 | * We can potentially deadlock here if we have an inode cluster |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1436 | * that has been freed has its buffer still pinned in memory because |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1437 | * the transaction is still sitting in a iclog. The stale inodes |
| 1438 | * on that buffer will have their flush locks held until the |
| 1439 | * transaction hits the disk and the callbacks run. the inode |
| 1440 | * flush takes the flush lock unconditionally and with nothing to |
| 1441 | * push out the iclog we will never get that unlocked. hence we |
| 1442 | * need to force the log first. |
| 1443 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1444 | xfs_log_force(mp, XFS_LOG_SYNC); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1445 | |
| 1446 | /* |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1447 | * Flush all pending changes from the AIL. |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1448 | */ |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1449 | xfs_ail_push_all_sync(mp->m_ail); |
| 1450 | |
| 1451 | /* |
| 1452 | * And reclaim all inodes. At this point there should be no dirty |
| 1453 | * inode, and none should be pinned or locked, but use synchronous |
| 1454 | * reclaim just to be sure. |
| 1455 | */ |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1456 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1458 | xfs_qm_unmount(mp); |
Lachlan McIlroy | a357a12 | 2008-10-30 16:53:25 +1100 | [diff] [blame] | 1459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | /* |
| 1461 | * Flush out the log synchronously so that we know for sure |
| 1462 | * that nothing is pinned. This is important because bflush() |
| 1463 | * will skip pinned buffers. |
| 1464 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1465 | xfs_log_force(mp, XFS_LOG_SYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1467 | /* |
| 1468 | * Unreserve any blocks we have so that when we unmount we don't account |
| 1469 | * the reserved free space as used. This is really only necessary for |
| 1470 | * lazy superblock counting because it trusts the incore superblock |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1471 | * counters to be absolutely correct on clean unmount. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1472 | * |
| 1473 | * We don't bother correcting this elsewhere for lazy superblock |
| 1474 | * counting because on mount of an unclean filesystem we reconstruct the |
| 1475 | * correct counter value and this is irrelevant. |
| 1476 | * |
| 1477 | * For non-lazy counter filesystems, this doesn't matter at all because |
| 1478 | * we only every apply deltas to the superblock and hence the incore |
| 1479 | * value does not matter.... |
| 1480 | */ |
| 1481 | resblks = 0; |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1482 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1483 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1484 | xfs_warn(mp, "Unable to free reserved block pool. " |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1485 | "Freespace may not be correct on next mount."); |
| 1486 | |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1487 | error = xfs_log_sbcount(mp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1488 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1489 | xfs_warn(mp, "Unable to update superblock counters. " |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1490 | "Freespace may not be correct on next mount."); |
Christoph Hellwig | 87c7bec | 2011-09-14 14:08:26 +0000 | [diff] [blame] | 1491 | |
| 1492 | /* |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1493 | * At this point we might have modified the superblock again and thus |
| 1494 | * added an item to the AIL, thus flush it again. |
Christoph Hellwig | 87c7bec | 2011-09-14 14:08:26 +0000 | [diff] [blame] | 1495 | */ |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1496 | xfs_ail_push_all_sync(mp->m_ail); |
Christoph Hellwig | 87c7bec | 2011-09-14 14:08:26 +0000 | [diff] [blame] | 1497 | xfs_wait_buftarg(mp->m_ddev_targp); |
| 1498 | |
Mark Tinguely | 9a57fa8 | 2012-07-24 10:59:19 -0500 | [diff] [blame] | 1499 | /* |
| 1500 | * The superblock buffer is uncached and xfsaild_push() will lock and |
| 1501 | * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait() |
| 1502 | * here but a lock on the superblock buffer will block until iodone() |
| 1503 | * has completed. |
| 1504 | */ |
| 1505 | xfs_buf_lock(mp->m_sb_bp); |
| 1506 | xfs_buf_unlock(mp->m_sb_bp); |
| 1507 | |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1508 | xfs_log_unmount_write(mp); |
| 1509 | xfs_log_unmount(mp); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1510 | xfs_uuid_unmount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
Christoph Hellwig | 1550d0b | 2008-08-13 16:17:37 +1000 | [diff] [blame] | 1512 | #if defined(DEBUG) |
Christoph Hellwig | 0ce4cfd | 2007-08-30 17:20:53 +1000 | [diff] [blame] | 1513 | xfs_errortag_clearall(mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | #endif |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1515 | xfs_free_perag(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | } |
| 1517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | int |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1519 | xfs_fs_writable(xfs_mount_t *mp) |
| 1520 | { |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 1521 | return !(mp->m_super->s_writers.frozen || XFS_FORCED_SHUTDOWN(mp) || |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 1522 | (mp->m_flags & XFS_MOUNT_RDONLY)); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1523 | } |
| 1524 | |
| 1525 | /* |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1526 | * xfs_log_sbcount |
| 1527 | * |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1528 | * Sync the superblock counters to disk. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1529 | * |
| 1530 | * Note this code can be called during the process of freezing, so |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1531 | * we may need to use the transaction allocator which does not |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1532 | * block when the transaction subsystem is in its frozen state. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1533 | */ |
| 1534 | int |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1535 | xfs_log_sbcount(xfs_mount_t *mp) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1536 | { |
| 1537 | xfs_trans_t *tp; |
| 1538 | int error; |
| 1539 | |
| 1540 | if (!xfs_fs_writable(mp)) |
| 1541 | return 0; |
| 1542 | |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 1543 | xfs_icsb_sync_counters(mp, 0); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1544 | |
| 1545 | /* |
| 1546 | * we don't need to do this if we are updating the superblock |
| 1547 | * counters on every modification. |
| 1548 | */ |
| 1549 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 1550 | return 0; |
| 1551 | |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1552 | tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1553 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1554 | XFS_DEFAULT_LOG_COUNT); |
| 1555 | if (error) { |
| 1556 | xfs_trans_cancel(tp, 0); |
| 1557 | return error; |
| 1558 | } |
| 1559 | |
| 1560 | 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] | 1561 | xfs_trans_set_sync(tp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1562 | error = xfs_trans_commit(tp, 0); |
| 1563 | return error; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1564 | } |
| 1565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | /* |
| 1567 | * xfs_mod_sb() can be used to copy arbitrary changes to the |
| 1568 | * in-core superblock into the superblock buffer to be logged. |
| 1569 | * It does not provide the higher level of locking that is |
| 1570 | * needed to protect the in-core superblock from concurrent |
| 1571 | * access. |
| 1572 | */ |
| 1573 | void |
| 1574 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) |
| 1575 | { |
| 1576 | xfs_buf_t *bp; |
| 1577 | int first; |
| 1578 | int last; |
| 1579 | xfs_mount_t *mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | xfs_sb_field_t f; |
| 1581 | |
| 1582 | ASSERT(fields); |
| 1583 | if (!fields) |
| 1584 | return; |
| 1585 | mp = tp->t_mountp; |
| 1586 | bp = xfs_trans_getsb(tp, mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | first = sizeof(xfs_sb_t); |
| 1588 | last = 0; |
| 1589 | |
| 1590 | /* translate/copy */ |
| 1591 | |
Christoph Hellwig | 2bdf7cd | 2007-08-28 13:58:06 +1000 | [diff] [blame] | 1592 | 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] | 1593 | |
| 1594 | /* find modified range */ |
Dave Chinner | 587aa0f | 2010-01-20 12:04:53 +1100 | [diff] [blame] | 1595 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); |
| 1596 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); |
| 1597 | last = xfs_sb_info[f + 1].offset - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | |
| 1599 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); |
| 1600 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); |
| 1601 | first = xfs_sb_info[f].offset; |
| 1602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | xfs_trans_log_buf(tp, bp, first, last); |
| 1604 | } |
Yingping Lu | d210a28 | 2006-06-09 14:55:18 +1000 | [diff] [blame] | 1605 | |
Yingping Lu | d210a28 | 2006-06-09 14:55:18 +1000 | [diff] [blame] | 1606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | /* |
| 1608 | * xfs_mod_incore_sb_unlocked() is a utility routine common used to apply |
| 1609 | * a delta to a specified field in the in-core superblock. Simply |
| 1610 | * switch on the field indicated and apply the delta to that field. |
| 1611 | * Fields are not allowed to dip below zero, so if the delta would |
| 1612 | * do this do not apply it and return EINVAL. |
| 1613 | * |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1614 | * The m_sb_lock must be held when this routine is called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 1616 | STATIC int |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 1617 | xfs_mod_incore_sb_unlocked( |
| 1618 | xfs_mount_t *mp, |
| 1619 | xfs_sb_field_t field, |
| 1620 | int64_t delta, |
| 1621 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | { |
| 1623 | int scounter; /* short counter for 32 bit fields */ |
| 1624 | long long lcounter; /* long counter for 64 bit fields */ |
| 1625 | long long res_used, rem; |
| 1626 | |
| 1627 | /* |
| 1628 | * With the in-core superblock spin lock held, switch |
| 1629 | * on the indicated field. Apply the delta to the |
| 1630 | * proper field. If the fields value would dip below |
| 1631 | * 0, then do not apply the delta and return EINVAL. |
| 1632 | */ |
| 1633 | switch (field) { |
| 1634 | case XFS_SBS_ICOUNT: |
| 1635 | lcounter = (long long)mp->m_sb.sb_icount; |
| 1636 | lcounter += delta; |
| 1637 | if (lcounter < 0) { |
| 1638 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1639 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | } |
| 1641 | mp->m_sb.sb_icount = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1642 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | case XFS_SBS_IFREE: |
| 1644 | lcounter = (long long)mp->m_sb.sb_ifree; |
| 1645 | lcounter += delta; |
| 1646 | if (lcounter < 0) { |
| 1647 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1648 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | } |
| 1650 | mp->m_sb.sb_ifree = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1651 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | case XFS_SBS_FDBLOCKS: |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 1653 | lcounter = (long long) |
| 1654 | mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); |
| 1656 | |
| 1657 | if (delta > 0) { /* Putting blocks back */ |
| 1658 | if (res_used > delta) { |
| 1659 | mp->m_resblks_avail += delta; |
| 1660 | } else { |
| 1661 | rem = delta - res_used; |
| 1662 | mp->m_resblks_avail = mp->m_resblks; |
| 1663 | lcounter += rem; |
| 1664 | } |
| 1665 | } else { /* Taking blocks away */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | lcounter += delta; |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1667 | if (lcounter >= 0) { |
| 1668 | mp->m_sb.sb_fdblocks = lcounter + |
| 1669 | XFS_ALLOC_SET_ASIDE(mp); |
| 1670 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | } |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 1672 | |
| 1673 | /* |
| 1674 | * We are out of blocks, use any available reserved |
| 1675 | * blocks if were allowed to. |
| 1676 | */ |
| 1677 | if (!rsvd) |
| 1678 | return XFS_ERROR(ENOSPC); |
| 1679 | |
| 1680 | lcounter = (long long)mp->m_resblks_avail + delta; |
| 1681 | if (lcounter >= 0) { |
| 1682 | mp->m_resblks_avail = lcounter; |
| 1683 | return 0; |
| 1684 | } |
| 1685 | printk_once(KERN_WARNING |
| 1686 | "Filesystem \"%s\": reserve blocks depleted! " |
| 1687 | "Consider increasing reserve pool size.", |
| 1688 | mp->m_fsname); |
| 1689 | return XFS_ERROR(ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 1692 | mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1693 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | case XFS_SBS_FREXTENTS: |
| 1695 | lcounter = (long long)mp->m_sb.sb_frextents; |
| 1696 | lcounter += delta; |
| 1697 | if (lcounter < 0) { |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1698 | return XFS_ERROR(ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | } |
| 1700 | mp->m_sb.sb_frextents = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1701 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | case XFS_SBS_DBLOCKS: |
| 1703 | lcounter = (long long)mp->m_sb.sb_dblocks; |
| 1704 | lcounter += delta; |
| 1705 | if (lcounter < 0) { |
| 1706 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1707 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | } |
| 1709 | mp->m_sb.sb_dblocks = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1710 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | case XFS_SBS_AGCOUNT: |
| 1712 | scounter = mp->m_sb.sb_agcount; |
| 1713 | scounter += delta; |
| 1714 | if (scounter < 0) { |
| 1715 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1716 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | } |
| 1718 | mp->m_sb.sb_agcount = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1719 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | case XFS_SBS_IMAX_PCT: |
| 1721 | scounter = mp->m_sb.sb_imax_pct; |
| 1722 | scounter += delta; |
| 1723 | if (scounter < 0) { |
| 1724 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1725 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
| 1727 | mp->m_sb.sb_imax_pct = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1728 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | case XFS_SBS_REXTSIZE: |
| 1730 | scounter = mp->m_sb.sb_rextsize; |
| 1731 | scounter += delta; |
| 1732 | if (scounter < 0) { |
| 1733 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1734 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | } |
| 1736 | mp->m_sb.sb_rextsize = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1737 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | case XFS_SBS_RBMBLOCKS: |
| 1739 | scounter = mp->m_sb.sb_rbmblocks; |
| 1740 | scounter += delta; |
| 1741 | if (scounter < 0) { |
| 1742 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1743 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | } |
| 1745 | mp->m_sb.sb_rbmblocks = scounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1746 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | case XFS_SBS_RBLOCKS: |
| 1748 | lcounter = (long long)mp->m_sb.sb_rblocks; |
| 1749 | lcounter += delta; |
| 1750 | if (lcounter < 0) { |
| 1751 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1752 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | } |
| 1754 | mp->m_sb.sb_rblocks = lcounter; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1755 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | case XFS_SBS_REXTENTS: |
| 1757 | lcounter = (long long)mp->m_sb.sb_rextents; |
| 1758 | lcounter += delta; |
| 1759 | if (lcounter < 0) { |
| 1760 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1761 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | } |
| 1763 | mp->m_sb.sb_rextents = 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_REXTSLOG: |
| 1766 | scounter = mp->m_sb.sb_rextslog; |
| 1767 | scounter += delta; |
| 1768 | if (scounter < 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_rextslog = scounter; |
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 | default: |
| 1775 | ASSERT(0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1776 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | } |
| 1778 | } |
| 1779 | |
| 1780 | /* |
| 1781 | * xfs_mod_incore_sb() is used to change a field in the in-core |
| 1782 | * superblock structure by the specified delta. This modification |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1783 | * 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] | 1784 | * routine to do the work. |
| 1785 | */ |
| 1786 | int |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 1787 | xfs_mod_incore_sb( |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1788 | struct xfs_mount *mp, |
| 1789 | xfs_sb_field_t field, |
| 1790 | int64_t delta, |
| 1791 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | { |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1793 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1795 | #ifdef HAVE_PERCPU_SB |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1796 | ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1797 | #endif |
Christoph Hellwig | 96540c7 | 2010-09-30 02:25:55 +0000 | [diff] [blame] | 1798 | spin_lock(&mp->m_sb_lock); |
| 1799 | status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); |
| 1800 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1801 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1802 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | } |
| 1804 | |
| 1805 | /* |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1806 | * 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] | 1807 | * |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1808 | * The fields and changes to those fields are specified in the array of |
| 1809 | * xfs_mod_sb structures passed in. Either all of the specified deltas |
| 1810 | * will be applied or none of them will. If any modified field dips below 0, |
| 1811 | * then all modifications will be backed out and EINVAL will be returned. |
| 1812 | * |
| 1813 | * Note that this function may not be used for the superblock values that |
| 1814 | * are tracked with the in-memory per-cpu counters - a direct call to |
| 1815 | * xfs_icsb_modify_counters is required for these. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | */ |
| 1817 | int |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1818 | xfs_mod_incore_sb_batch( |
| 1819 | struct xfs_mount *mp, |
| 1820 | xfs_mod_sb_t *msb, |
| 1821 | uint nmsb, |
| 1822 | int rsvd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | { |
David Sterba | 45c51b9 | 2011-04-13 22:03:28 +0000 | [diff] [blame] | 1824 | xfs_mod_sb_t *msbp; |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1825 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | |
| 1827 | /* |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1828 | * Loop through the array of mod structures and apply each individually. |
| 1829 | * If any fail, then back out all those which have already been applied. |
| 1830 | * Do all of this within the scope of the m_sb_lock so that all of the |
| 1831 | * changes will be atomic. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1833 | spin_lock(&mp->m_sb_lock); |
David Sterba | 45c51b9 | 2011-04-13 22:03:28 +0000 | [diff] [blame] | 1834 | for (msbp = msb; msbp < (msb + nmsb); msbp++) { |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1835 | ASSERT(msbp->msb_field < XFS_SBS_ICOUNT || |
| 1836 | msbp->msb_field > XFS_SBS_FDBLOCKS); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1837 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1838 | error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, |
| 1839 | msbp->msb_delta, rsvd); |
| 1840 | if (error) |
| 1841 | goto unwind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | } |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1843 | spin_unlock(&mp->m_sb_lock); |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 1844 | return 0; |
| 1845 | |
| 1846 | unwind: |
| 1847 | while (--msbp >= msb) { |
| 1848 | error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, |
| 1849 | -msbp->msb_delta, rsvd); |
| 1850 | ASSERT(error == 0); |
| 1851 | } |
| 1852 | spin_unlock(&mp->m_sb_lock); |
| 1853 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | } |
| 1855 | |
| 1856 | /* |
| 1857 | * xfs_getsb() is called to obtain the buffer for the superblock. |
| 1858 | * The buffer is returned locked and read in from disk. |
| 1859 | * The buffer should be released with a call to xfs_brelse(). |
| 1860 | * |
| 1861 | * If the flags parameter is BUF_TRYLOCK, then we'll only return |
| 1862 | * the superblock buffer if it can be locked without sleeping. |
| 1863 | * If it can't then we'll return NULL. |
| 1864 | */ |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1865 | struct xfs_buf * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | xfs_getsb( |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1867 | struct xfs_mount *mp, |
| 1868 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | { |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1870 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1872 | if (!xfs_buf_trylock(bp)) { |
| 1873 | if (flags & XBF_TRYLOCK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | return NULL; |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1875 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | } |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1877 | |
Chandra Seetharaman | 72790aa | 2011-07-22 23:40:04 +0000 | [diff] [blame] | 1878 | xfs_buf_hold(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | ASSERT(XFS_BUF_ISDONE(bp)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1880 | return bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | } |
| 1882 | |
| 1883 | /* |
| 1884 | * Used to free the superblock along various error paths. |
| 1885 | */ |
| 1886 | void |
| 1887 | xfs_freesb( |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1888 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | { |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1890 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1892 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | mp->m_sb_bp = NULL; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1894 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | } |
| 1896 | |
| 1897 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | * 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] | 1899 | * be altered by the mount options, as well as any potential sb_features2 |
| 1900 | * fixup. Only the first superblock is updated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 1902 | int |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1903 | xfs_mount_log_sb( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | xfs_mount_t *mp, |
| 1905 | __int64_t fields) |
| 1906 | { |
| 1907 | xfs_trans_t *tp; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1908 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 1910 | ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID | |
David Chinner | 4b166de | 2008-05-20 11:30:27 +1000 | [diff] [blame] | 1911 | XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2 | |
| 1912 | XFS_SB_VERSIONNUM)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
| 1914 | tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1915 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
| 1916 | XFS_DEFAULT_LOG_COUNT); |
| 1917 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | xfs_trans_cancel(tp, 0); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1919 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | } |
| 1921 | xfs_mod_sb(tp, fields); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1922 | error = xfs_trans_commit(tp, 0); |
| 1923 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1925 | |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1926 | /* |
| 1927 | * If the underlying (data/log/rt) device is readonly, there are some |
| 1928 | * operations that cannot proceed. |
| 1929 | */ |
| 1930 | int |
| 1931 | xfs_dev_is_read_only( |
| 1932 | struct xfs_mount *mp, |
| 1933 | char *message) |
| 1934 | { |
| 1935 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || |
| 1936 | xfs_readonly_buftarg(mp->m_logdev_targp) || |
| 1937 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1938 | xfs_notice(mp, "%s required on read-only device.", message); |
| 1939 | xfs_notice(mp, "write access unavailable, cannot proceed."); |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1940 | return EROFS; |
| 1941 | } |
| 1942 | return 0; |
| 1943 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1944 | |
| 1945 | #ifdef HAVE_PERCPU_SB |
| 1946 | /* |
| 1947 | * Per-cpu incore superblock counters |
| 1948 | * |
| 1949 | * Simple concept, difficult implementation |
| 1950 | * |
| 1951 | * Basically, replace the incore superblock counters with a distributed per cpu |
| 1952 | * counter for contended fields (e.g. free block count). |
| 1953 | * |
| 1954 | * Difficulties arise in that the incore sb is used for ENOSPC checking, and |
| 1955 | * hence needs to be accurately read when we are running low on space. Hence |
| 1956 | * there is a method to enable and disable the per-cpu counters based on how |
| 1957 | * much "stuff" is available in them. |
| 1958 | * |
| 1959 | * Basically, a counter is enabled if there is enough free resource to justify |
| 1960 | * running a per-cpu fast-path. If the per-cpu counter runs out (i.e. a local |
| 1961 | * ENOSPC), then we disable the counters to synchronise all callers and |
| 1962 | * re-distribute the available resources. |
| 1963 | * |
| 1964 | * If, once we redistributed the available resources, we still get a failure, |
| 1965 | * we disable the per-cpu counter and go through the slow path. |
| 1966 | * |
| 1967 | * 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] | 1968 | * 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] | 1969 | * the global superblock. We do this after disabling the counter to prevent |
| 1970 | * more threads from queueing up on the counter. |
| 1971 | * |
| 1972 | * Essentially, this means that we still need a lock in the fast path to enable |
| 1973 | * synchronisation between the global counters and the per-cpu counters. This |
| 1974 | * is not a problem because the lock will be local to a CPU almost all the time |
| 1975 | * and have little contention except when we get to ENOSPC conditions. |
| 1976 | * |
| 1977 | * Basically, this lock becomes a barrier that enables us to lock out the fast |
| 1978 | * path while we do things like enabling and disabling counters and |
| 1979 | * synchronising the counters. |
| 1980 | * |
| 1981 | * Locking rules: |
| 1982 | * |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1983 | * 1. m_sb_lock before picking up per-cpu locks |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1984 | * 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] | 1985 | * 3. accurate counter sync requires m_sb_lock + per cpu locks |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1986 | * 4. modifying per-cpu counters requires holding per-cpu lock |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 1987 | * 5. modifying global counters requires holding m_sb_lock |
| 1988 | * 6. enabling or disabling a counter requires holding the m_sb_lock |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1989 | * and _none_ of the per-cpu locks. |
| 1990 | * |
| 1991 | * Disabled counters are only ever re-enabled by a balance operation |
| 1992 | * that results in more free resources per CPU than a given threshold. |
| 1993 | * To ensure counters don't remain disabled, they are rebalanced when |
| 1994 | * the global resource goes above a higher threshold (i.e. some hysteresis |
| 1995 | * is present to prevent thrashing). |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 1996 | */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 1997 | |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 1998 | #ifdef CONFIG_HOTPLUG_CPU |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 1999 | /* |
| 2000 | * hot-plug CPU notifier support. |
| 2001 | * |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2002 | * We need a notifier per filesystem as we need to be able to identify |
| 2003 | * the filesystem to balance the counters out. This is achieved by |
| 2004 | * having a notifier block embedded in the xfs_mount_t and doing pointer |
| 2005 | * magic to get the mount pointer from the notifier block address. |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2006 | */ |
| 2007 | STATIC int |
| 2008 | xfs_icsb_cpu_notify( |
| 2009 | struct notifier_block *nfb, |
| 2010 | unsigned long action, |
| 2011 | void *hcpu) |
| 2012 | { |
| 2013 | xfs_icsb_cnts_t *cntp; |
| 2014 | xfs_mount_t *mp; |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2015 | |
| 2016 | mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier); |
| 2017 | cntp = (xfs_icsb_cnts_t *) |
| 2018 | per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu); |
| 2019 | switch (action) { |
| 2020 | case CPU_UP_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2021 | case CPU_UP_PREPARE_FROZEN: |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2022 | /* Easy Case - initialize the area and locks, and |
| 2023 | * then rebalance when online does everything else for us. */ |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2024 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2025 | break; |
| 2026 | case CPU_ONLINE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2027 | case CPU_ONLINE_FROZEN: |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2028 | xfs_icsb_lock(mp); |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2029 | xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); |
| 2030 | xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); |
| 2031 | xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2032 | xfs_icsb_unlock(mp); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2033 | break; |
| 2034 | case CPU_DEAD: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 2035 | case CPU_DEAD_FROZEN: |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2036 | /* Disable all the counters, then fold the dead cpu's |
| 2037 | * count into the total on the global superblock and |
| 2038 | * re-enable the counters. */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2039 | xfs_icsb_lock(mp); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2040 | spin_lock(&mp->m_sb_lock); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2041 | xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT); |
| 2042 | xfs_icsb_disable_counter(mp, XFS_SBS_IFREE); |
| 2043 | xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS); |
| 2044 | |
| 2045 | mp->m_sb.sb_icount += cntp->icsb_icount; |
| 2046 | mp->m_sb.sb_ifree += cntp->icsb_ifree; |
| 2047 | mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks; |
| 2048 | |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2049 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2050 | |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2051 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); |
| 2052 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); |
| 2053 | xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2054 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2055 | xfs_icsb_unlock(mp); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2056 | break; |
| 2057 | } |
| 2058 | |
| 2059 | return NOTIFY_OK; |
| 2060 | } |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2061 | #endif /* CONFIG_HOTPLUG_CPU */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2062 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2063 | int |
| 2064 | xfs_icsb_init_counters( |
| 2065 | xfs_mount_t *mp) |
| 2066 | { |
| 2067 | xfs_icsb_cnts_t *cntp; |
| 2068 | int i; |
| 2069 | |
| 2070 | mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t); |
| 2071 | if (mp->m_sb_cnts == NULL) |
| 2072 | return -ENOMEM; |
| 2073 | |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2074 | #ifdef CONFIG_HOTPLUG_CPU |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2075 | mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify; |
| 2076 | mp->m_icsb_notifier.priority = 0; |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2077 | register_hotcpu_notifier(&mp->m_icsb_notifier); |
| 2078 | #endif /* CONFIG_HOTPLUG_CPU */ |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2079 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2080 | for_each_online_cpu(i) { |
| 2081 | 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] | 2082 | memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2083 | } |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2084 | |
| 2085 | mutex_init(&mp->m_icsb_mutex); |
| 2086 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2087 | /* |
| 2088 | * start with all counters disabled so that the |
| 2089 | * initial balance kicks us off correctly |
| 2090 | */ |
| 2091 | mp->m_icsb_counters = -1; |
| 2092 | return 0; |
| 2093 | } |
| 2094 | |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 2095 | void |
| 2096 | xfs_icsb_reinit_counters( |
| 2097 | xfs_mount_t *mp) |
| 2098 | { |
| 2099 | xfs_icsb_lock(mp); |
| 2100 | /* |
| 2101 | * start with all counters disabled so that the |
| 2102 | * initial balance kicks us off correctly |
| 2103 | */ |
| 2104 | mp->m_icsb_counters = -1; |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2105 | xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); |
| 2106 | xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); |
| 2107 | xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); |
Lachlan McIlroy | 5478eea | 2007-02-10 18:36:29 +1100 | [diff] [blame] | 2108 | xfs_icsb_unlock(mp); |
| 2109 | } |
| 2110 | |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 2111 | void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2112 | xfs_icsb_destroy_counters( |
| 2113 | xfs_mount_t *mp) |
| 2114 | { |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2115 | if (mp->m_sb_cnts) { |
Chandra Seetharaman | 5a67e4c | 2006-06-27 02:54:11 -0700 | [diff] [blame] | 2116 | unregister_hotcpu_notifier(&mp->m_icsb_notifier); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2117 | free_percpu(mp->m_sb_cnts); |
David Chinner | e8234a6 | 2006-03-14 13:23:52 +1100 | [diff] [blame] | 2118 | } |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2119 | mutex_destroy(&mp->m_icsb_mutex); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2120 | } |
| 2121 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2122 | STATIC void |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2123 | xfs_icsb_lock_cntr( |
| 2124 | xfs_icsb_cnts_t *icsbp) |
| 2125 | { |
| 2126 | while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) { |
| 2127 | ndelay(1000); |
| 2128 | } |
| 2129 | } |
| 2130 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2131 | STATIC void |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2132 | xfs_icsb_unlock_cntr( |
| 2133 | xfs_icsb_cnts_t *icsbp) |
| 2134 | { |
| 2135 | clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags); |
| 2136 | } |
| 2137 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2138 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2139 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2140 | xfs_icsb_lock_all_counters( |
| 2141 | xfs_mount_t *mp) |
| 2142 | { |
| 2143 | xfs_icsb_cnts_t *cntp; |
| 2144 | int i; |
| 2145 | |
| 2146 | for_each_online_cpu(i) { |
| 2147 | 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] | 2148 | xfs_icsb_lock_cntr(cntp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2149 | } |
| 2150 | } |
| 2151 | |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 2152 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2153 | xfs_icsb_unlock_all_counters( |
| 2154 | xfs_mount_t *mp) |
| 2155 | { |
| 2156 | xfs_icsb_cnts_t *cntp; |
| 2157 | int i; |
| 2158 | |
| 2159 | for_each_online_cpu(i) { |
| 2160 | 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] | 2161 | xfs_icsb_unlock_cntr(cntp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | STATIC void |
| 2166 | xfs_icsb_count( |
| 2167 | xfs_mount_t *mp, |
| 2168 | xfs_icsb_cnts_t *cnt, |
| 2169 | int flags) |
| 2170 | { |
| 2171 | xfs_icsb_cnts_t *cntp; |
| 2172 | int i; |
| 2173 | |
| 2174 | memset(cnt, 0, sizeof(xfs_icsb_cnts_t)); |
| 2175 | |
| 2176 | if (!(flags & XFS_ICSB_LAZY_COUNT)) |
| 2177 | xfs_icsb_lock_all_counters(mp); |
| 2178 | |
| 2179 | for_each_online_cpu(i) { |
| 2180 | cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); |
| 2181 | cnt->icsb_icount += cntp->icsb_icount; |
| 2182 | cnt->icsb_ifree += cntp->icsb_ifree; |
| 2183 | cnt->icsb_fdblocks += cntp->icsb_fdblocks; |
| 2184 | } |
| 2185 | |
| 2186 | if (!(flags & XFS_ICSB_LAZY_COUNT)) |
| 2187 | xfs_icsb_unlock_all_counters(mp); |
| 2188 | } |
| 2189 | |
| 2190 | STATIC int |
| 2191 | xfs_icsb_counter_disabled( |
| 2192 | xfs_mount_t *mp, |
| 2193 | xfs_sb_field_t field) |
| 2194 | { |
| 2195 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2196 | return test_bit(field, &mp->m_icsb_counters); |
| 2197 | } |
| 2198 | |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 2199 | STATIC void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2200 | xfs_icsb_disable_counter( |
| 2201 | xfs_mount_t *mp, |
| 2202 | xfs_sb_field_t field) |
| 2203 | { |
| 2204 | xfs_icsb_cnts_t cnt; |
| 2205 | |
| 2206 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2207 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2208 | /* |
| 2209 | * If we are already disabled, then there is nothing to do |
| 2210 | * here. We check before locking all the counters to avoid |
| 2211 | * the expensive lock operation when being called in the |
| 2212 | * slow path and the counter is already disabled. This is |
| 2213 | * safe because the only time we set or clear this state is under |
| 2214 | * the m_icsb_mutex. |
| 2215 | */ |
| 2216 | if (xfs_icsb_counter_disabled(mp, field)) |
David Chinner | 36fbe6e | 2008-04-10 12:19:56 +1000 | [diff] [blame] | 2217 | return; |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2218 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2219 | xfs_icsb_lock_all_counters(mp); |
| 2220 | if (!test_and_set_bit(field, &mp->m_icsb_counters)) { |
| 2221 | /* drain back to superblock */ |
| 2222 | |
Christoph Hellwig | ce46193 | 2008-04-22 17:34:50 +1000 | [diff] [blame] | 2223 | xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2224 | switch(field) { |
| 2225 | case XFS_SBS_ICOUNT: |
| 2226 | mp->m_sb.sb_icount = cnt.icsb_icount; |
| 2227 | break; |
| 2228 | case XFS_SBS_IFREE: |
| 2229 | mp->m_sb.sb_ifree = cnt.icsb_ifree; |
| 2230 | break; |
| 2231 | case XFS_SBS_FDBLOCKS: |
| 2232 | mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; |
| 2233 | break; |
| 2234 | default: |
| 2235 | BUG(); |
| 2236 | } |
| 2237 | } |
| 2238 | |
| 2239 | xfs_icsb_unlock_all_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2240 | } |
| 2241 | |
| 2242 | STATIC void |
| 2243 | xfs_icsb_enable_counter( |
| 2244 | xfs_mount_t *mp, |
| 2245 | xfs_sb_field_t field, |
| 2246 | uint64_t count, |
| 2247 | uint64_t resid) |
| 2248 | { |
| 2249 | xfs_icsb_cnts_t *cntp; |
| 2250 | int i; |
| 2251 | |
| 2252 | ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); |
| 2253 | |
| 2254 | xfs_icsb_lock_all_counters(mp); |
| 2255 | for_each_online_cpu(i) { |
| 2256 | cntp = per_cpu_ptr(mp->m_sb_cnts, i); |
| 2257 | switch (field) { |
| 2258 | case XFS_SBS_ICOUNT: |
| 2259 | cntp->icsb_icount = count + resid; |
| 2260 | break; |
| 2261 | case XFS_SBS_IFREE: |
| 2262 | cntp->icsb_ifree = count + resid; |
| 2263 | break; |
| 2264 | case XFS_SBS_FDBLOCKS: |
| 2265 | cntp->icsb_fdblocks = count + resid; |
| 2266 | break; |
| 2267 | default: |
| 2268 | BUG(); |
| 2269 | break; |
| 2270 | } |
| 2271 | resid = 0; |
| 2272 | } |
| 2273 | clear_bit(field, &mp->m_icsb_counters); |
| 2274 | xfs_icsb_unlock_all_counters(mp); |
| 2275 | } |
| 2276 | |
David Chinner | dbcabad | 2007-02-10 18:36:17 +1100 | [diff] [blame] | 2277 | void |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2278 | xfs_icsb_sync_counters_locked( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2279 | xfs_mount_t *mp, |
| 2280 | int flags) |
| 2281 | { |
| 2282 | xfs_icsb_cnts_t cnt; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2283 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2284 | xfs_icsb_count(mp, &cnt, flags); |
| 2285 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2286 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) |
| 2287 | mp->m_sb.sb_icount = cnt.icsb_icount; |
| 2288 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) |
| 2289 | mp->m_sb.sb_ifree = cnt.icsb_ifree; |
| 2290 | if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) |
| 2291 | mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2292 | } |
| 2293 | |
| 2294 | /* |
| 2295 | * Accurate update of per-cpu counters to incore superblock |
| 2296 | */ |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2297 | void |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2298 | xfs_icsb_sync_counters( |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2299 | xfs_mount_t *mp, |
| 2300 | int flags) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2301 | { |
Christoph Hellwig | d4d90b5 | 2008-04-22 17:34:37 +1000 | [diff] [blame] | 2302 | spin_lock(&mp->m_sb_lock); |
| 2303 | xfs_icsb_sync_counters_locked(mp, flags); |
| 2304 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2305 | } |
| 2306 | |
| 2307 | /* |
| 2308 | * Balance and enable/disable counters as necessary. |
| 2309 | * |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2310 | * Thresholds for re-enabling counters are somewhat magic. inode counts are |
| 2311 | * chosen to be the same number as single on disk allocation chunk per CPU, and |
| 2312 | * free blocks is something far enough zero that we aren't going thrash when we |
| 2313 | * get near ENOSPC. We also need to supply a minimum we require per cpu to |
| 2314 | * prevent looping endlessly when xfs_alloc_space asks for more than will |
| 2315 | * be distributed to a single CPU but each CPU has enough blocks to be |
| 2316 | * reenabled. |
| 2317 | * |
| 2318 | * Note that we can be called when counters are already disabled. |
| 2319 | * xfs_icsb_disable_counter() optimises the counter locking in this case to |
| 2320 | * prevent locking every per-cpu counter needlessly. |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2321 | */ |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2322 | |
| 2323 | #define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64 |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2324 | #define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \ |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2325 | (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp)) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2326 | STATIC void |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2327 | xfs_icsb_balance_counter_locked( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2328 | xfs_mount_t *mp, |
| 2329 | xfs_sb_field_t field, |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2330 | int min_per_cpu) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2331 | { |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 2332 | uint64_t count, resid; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2333 | int weight = num_online_cpus(); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2334 | uint64_t min = (uint64_t)min_per_cpu; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2335 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2336 | /* disable counter and sync counter */ |
| 2337 | xfs_icsb_disable_counter(mp, field); |
| 2338 | |
| 2339 | /* update counters - first CPU gets residual*/ |
| 2340 | switch (field) { |
| 2341 | case XFS_SBS_ICOUNT: |
| 2342 | count = mp->m_sb.sb_icount; |
| 2343 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2344 | if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2345 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2346 | break; |
| 2347 | case XFS_SBS_IFREE: |
| 2348 | count = mp->m_sb.sb_ifree; |
| 2349 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2350 | if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2351 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2352 | break; |
| 2353 | case XFS_SBS_FDBLOCKS: |
| 2354 | count = mp->m_sb.sb_fdblocks; |
| 2355 | resid = do_div(count, weight); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2356 | if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp))) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2357 | return; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2358 | break; |
| 2359 | default: |
| 2360 | BUG(); |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 2361 | count = resid = 0; /* quiet, gcc */ |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2362 | break; |
| 2363 | } |
| 2364 | |
| 2365 | xfs_icsb_enable_counter(mp, field, count, resid); |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2366 | } |
| 2367 | |
| 2368 | STATIC void |
| 2369 | xfs_icsb_balance_counter( |
| 2370 | xfs_mount_t *mp, |
| 2371 | xfs_sb_field_t fields, |
| 2372 | int min_per_cpu) |
| 2373 | { |
| 2374 | spin_lock(&mp->m_sb_lock); |
| 2375 | xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu); |
| 2376 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2377 | } |
| 2378 | |
Christoph Hellwig | 1b04071 | 2010-09-30 02:25:56 +0000 | [diff] [blame] | 2379 | int |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2380 | xfs_icsb_modify_counters( |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2381 | xfs_mount_t *mp, |
| 2382 | xfs_sb_field_t field, |
David Chinner | 20f4ebf | 2007-02-10 18:36:10 +1100 | [diff] [blame] | 2383 | int64_t delta, |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2384 | int rsvd) |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2385 | { |
| 2386 | xfs_icsb_cnts_t *icsbp; |
| 2387 | long long lcounter; /* long counter for 64 bit fields */ |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2388 | int ret = 0; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2389 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2390 | might_sleep(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2391 | again: |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2392 | preempt_disable(); |
| 2393 | icsbp = this_cpu_ptr(mp->m_sb_cnts); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2394 | |
| 2395 | /* |
| 2396 | * if the counter is disabled, go to slow path |
| 2397 | */ |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2398 | if (unlikely(xfs_icsb_counter_disabled(mp, field))) |
| 2399 | goto slow_path; |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2400 | xfs_icsb_lock_cntr(icsbp); |
| 2401 | if (unlikely(xfs_icsb_counter_disabled(mp, field))) { |
| 2402 | xfs_icsb_unlock_cntr(icsbp); |
| 2403 | goto slow_path; |
| 2404 | } |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2405 | |
| 2406 | switch (field) { |
| 2407 | case XFS_SBS_ICOUNT: |
| 2408 | lcounter = icsbp->icsb_icount; |
| 2409 | lcounter += delta; |
| 2410 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2411 | goto balance_counter; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2412 | icsbp->icsb_icount = lcounter; |
| 2413 | break; |
| 2414 | |
| 2415 | case XFS_SBS_IFREE: |
| 2416 | lcounter = icsbp->icsb_ifree; |
| 2417 | lcounter += delta; |
| 2418 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2419 | goto balance_counter; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2420 | icsbp->icsb_ifree = lcounter; |
| 2421 | break; |
| 2422 | |
| 2423 | case XFS_SBS_FDBLOCKS: |
| 2424 | BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0); |
| 2425 | |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2426 | lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2427 | lcounter += delta; |
| 2428 | if (unlikely(lcounter < 0)) |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2429 | goto balance_counter; |
David Chinner | 4be536d | 2006-09-07 14:26:50 +1000 | [diff] [blame] | 2430 | icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2431 | break; |
| 2432 | default: |
| 2433 | BUG(); |
| 2434 | break; |
| 2435 | } |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2436 | xfs_icsb_unlock_cntr(icsbp); |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2437 | preempt_enable(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2438 | return 0; |
| 2439 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2440 | slow_path: |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2441 | preempt_enable(); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2442 | |
| 2443 | /* |
| 2444 | * serialise with a mutex so we don't burn lots of cpu on |
| 2445 | * the superblock lock. We still need to hold the superblock |
| 2446 | * lock, however, when we modify the global structures. |
| 2447 | */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2448 | xfs_icsb_lock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2449 | |
| 2450 | /* |
| 2451 | * Now running atomically. |
| 2452 | * |
| 2453 | * If the counter is enabled, someone has beaten us to rebalancing. |
| 2454 | * Drop the lock and try again in the fast path.... |
| 2455 | */ |
| 2456 | if (!(xfs_icsb_counter_disabled(mp, field))) { |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2457 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2458 | goto again; |
| 2459 | } |
| 2460 | |
| 2461 | /* |
| 2462 | * The counter is currently disabled. Because we are |
| 2463 | * running atomically here, we know a rebalance cannot |
| 2464 | * be in progress. Hence we can go straight to operating |
| 2465 | * on the global superblock. We do not call xfs_mod_incore_sb() |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2466 | * 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] | 2467 | * will cause us to re-enter this function and deadlock. |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2468 | * Hence we get the m_sb_lock ourselves and then call |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2469 | * xfs_mod_incore_sb_unlocked() as the unlocked path operates |
| 2470 | * directly on the global counters. |
| 2471 | */ |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2472 | spin_lock(&mp->m_sb_lock); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2473 | ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 2474 | spin_unlock(&mp->m_sb_lock); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2475 | |
| 2476 | /* |
| 2477 | * Now that we've modified the global superblock, we |
| 2478 | * may be able to re-enable the distributed counters |
| 2479 | * (e.g. lots of space just got freed). After that |
| 2480 | * we are done. |
| 2481 | */ |
| 2482 | if (ret != ENOSPC) |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2483 | xfs_icsb_balance_counter(mp, field, 0); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2484 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2485 | return ret; |
| 2486 | |
| 2487 | balance_counter: |
David Chinner | 01e1b69 | 2006-03-14 13:29:16 +1100 | [diff] [blame] | 2488 | xfs_icsb_unlock_cntr(icsbp); |
Christoph Lameter | 7a9e02d | 2009-10-03 19:48:23 +0900 | [diff] [blame] | 2489 | preempt_enable(); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2490 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2491 | /* |
| 2492 | * We may have multiple threads here if multiple per-cpu |
| 2493 | * counters run dry at the same time. This will mean we can |
| 2494 | * do more balances than strictly necessary but it is not |
| 2495 | * the common slowpath case. |
| 2496 | */ |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2497 | xfs_icsb_lock(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2498 | |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2499 | /* |
| 2500 | * running atomically. |
| 2501 | * |
| 2502 | * This will leave the counter in the correct state for future |
| 2503 | * accesses. After the rebalance, we simply try again and our retry |
| 2504 | * will either succeed through the fast path or slow path without |
| 2505 | * another balance operation being required. |
| 2506 | */ |
Christoph Hellwig | 45af6c6 | 2008-04-22 17:34:44 +1000 | [diff] [blame] | 2507 | xfs_icsb_balance_counter(mp, field, delta); |
David Chinner | 03135cf | 2007-02-10 18:35:15 +1100 | [diff] [blame] | 2508 | xfs_icsb_unlock(mp); |
David Chinner | 20b6428 | 2007-02-10 18:35:09 +1100 | [diff] [blame] | 2509 | goto again; |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2510 | } |
| 2511 | |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 2512 | #endif |