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" |
Dave Chinner | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 20 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 21 | #include "xfs_format.h" |
| 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_sb.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_mount.h" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 27 | #include "xfs_da_format.h" |
Dave Chinner | 9a2cc41 | 2014-12-04 09:43:17 +1100 | [diff] [blame] | 28 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_inode.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 30 | #include "xfs_dir2.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_alloc.h" |
| 33 | #include "xfs_rtalloc.h" |
| 34 | #include "xfs_bmap.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 35 | #include "xfs_trans.h" |
| 36 | #include "xfs_trans_priv.h" |
| 37 | #include "xfs_log.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_quota.h" |
| 40 | #include "xfs_fsops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 41 | #include "xfs_trace.h" |
Dave Chinner | 6d8b79c | 2012-10-08 21:56:09 +1100 | [diff] [blame] | 42 | #include "xfs_icache.h" |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 43 | #include "xfs_sysfs.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 46 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
| 47 | static int xfs_uuid_table_size; |
| 48 | static uuid_t *xfs_uuid_table; |
| 49 | |
| 50 | /* |
| 51 | * See if the UUID is unique among mounted XFS filesystems. |
| 52 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. |
| 53 | */ |
| 54 | STATIC int |
| 55 | xfs_uuid_mount( |
| 56 | struct xfs_mount *mp) |
| 57 | { |
| 58 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 59 | int hole, i; |
| 60 | |
| 61 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 62 | return 0; |
| 63 | |
| 64 | if (uuid_is_nil(uuid)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 65 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 66 | return -EINVAL; |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | mutex_lock(&xfs_uuid_table_mutex); |
| 70 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { |
| 71 | if (uuid_is_nil(&xfs_uuid_table[i])) { |
| 72 | hole = i; |
| 73 | continue; |
| 74 | } |
| 75 | if (uuid_equal(uuid, &xfs_uuid_table[i])) |
| 76 | goto out_duplicate; |
| 77 | } |
| 78 | |
| 79 | if (hole < 0) { |
| 80 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, |
| 81 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), |
| 82 | xfs_uuid_table_size * sizeof(*xfs_uuid_table), |
| 83 | KM_SLEEP); |
| 84 | hole = xfs_uuid_table_size++; |
| 85 | } |
| 86 | xfs_uuid_table[hole] = *uuid; |
| 87 | mutex_unlock(&xfs_uuid_table_mutex); |
| 88 | |
| 89 | return 0; |
| 90 | |
| 91 | out_duplicate: |
| 92 | mutex_unlock(&xfs_uuid_table_mutex); |
Mitsuo Hayasaka | 021000e | 2012-01-13 05:58:39 +0000 | [diff] [blame] | 93 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 94 | return -EINVAL; |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | STATIC void |
| 98 | xfs_uuid_unmount( |
| 99 | struct xfs_mount *mp) |
| 100 | { |
| 101 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 102 | int i; |
| 103 | |
| 104 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 105 | return; |
| 106 | |
| 107 | mutex_lock(&xfs_uuid_table_mutex); |
| 108 | for (i = 0; i < xfs_uuid_table_size; i++) { |
| 109 | if (uuid_is_nil(&xfs_uuid_table[i])) |
| 110 | continue; |
| 111 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) |
| 112 | continue; |
| 113 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); |
| 114 | break; |
| 115 | } |
| 116 | ASSERT(i < xfs_uuid_table_size); |
| 117 | mutex_unlock(&xfs_uuid_table_mutex); |
| 118 | } |
| 119 | |
| 120 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 121 | STATIC void |
| 122 | __xfs_free_perag( |
| 123 | struct rcu_head *head) |
| 124 | { |
| 125 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); |
| 126 | |
| 127 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
| 128 | kmem_free(pag); |
| 129 | } |
| 130 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 131 | /* |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 132 | * Free up the per-ag resources associated with the mount structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | */ |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 134 | STATIC void |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 135 | xfs_free_perag( |
Christoph Hellwig | 745f691 | 2007-08-30 17:20:39 +1000 | [diff] [blame] | 136 | xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 138 | xfs_agnumber_t agno; |
| 139 | struct xfs_perag *pag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 141 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| 142 | spin_lock(&mp->m_perag_lock); |
| 143 | pag = radix_tree_delete(&mp->m_perag_tree, agno); |
| 144 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 145 | ASSERT(pag); |
Dave Chinner | f83282a | 2010-11-08 08:55:04 +0000 | [diff] [blame] | 146 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 147 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 151 | /* |
| 152 | * Check size of device based on the (data/realtime) block count. |
| 153 | * Note: this check is used by the growfs code as well as mount. |
| 154 | */ |
| 155 | int |
| 156 | xfs_sb_validate_fsb_count( |
| 157 | xfs_sb_t *sbp, |
| 158 | __uint64_t nblocks) |
| 159 | { |
| 160 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); |
| 161 | ASSERT(sbp->sb_blocklog >= BBSHIFT); |
| 162 | |
Christoph Hellwig | d5cf09b | 2014-07-30 09:12:05 +1000 | [diff] [blame] | 163 | /* Limited by ULONG_MAX of page cache index */ |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 164 | if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 165 | return -EFBIG; |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 166 | return 0; |
| 167 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 169 | int |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 170 | xfs_initialize_perag( |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 171 | xfs_mount_t *mp, |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 172 | xfs_agnumber_t agcount, |
| 173 | xfs_agnumber_t *maxagi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | { |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 175 | xfs_agnumber_t index; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 176 | xfs_agnumber_t first_initialised = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | xfs_perag_t *pag; |
| 178 | xfs_agino_t agino; |
| 179 | xfs_ino_t ino; |
| 180 | xfs_sb_t *sbp = &mp->m_sb; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 181 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 183 | /* |
| 184 | * Walk the current per-ag tree so we don't try to initialise AGs |
| 185 | * that already exist (growfs case). Allocate and insert all the |
| 186 | * AGs we don't find ready for initialisation. |
| 187 | */ |
| 188 | for (index = 0; index < agcount; index++) { |
| 189 | pag = xfs_perag_get(mp, index); |
| 190 | if (pag) { |
| 191 | xfs_perag_put(pag); |
| 192 | continue; |
| 193 | } |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 194 | if (!first_initialised) |
| 195 | first_initialised = index; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 196 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 197 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
| 198 | if (!pag) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 199 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 200 | pag->pag_agno = index; |
| 201 | pag->pag_mount = mp; |
Dave Chinner | 1a427ab | 2010-12-16 17:08:41 +1100 | [diff] [blame] | 202 | spin_lock_init(&pag->pag_ici_lock); |
Dave Chinner | 69b491c | 2010-09-27 11:09:51 +1000 | [diff] [blame] | 203 | mutex_init(&pag->pag_ici_reclaim_lock); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 204 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
Dave Chinner | 74f75a0 | 2010-09-24 19:59:04 +1000 | [diff] [blame] | 205 | spin_lock_init(&pag->pag_buf_lock); |
| 206 | pag->pag_buf_tree = RB_ROOT; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 207 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 208 | if (radix_tree_preload(GFP_NOFS)) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 209 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 210 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 211 | spin_lock(&mp->m_perag_lock); |
| 212 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { |
| 213 | BUG(); |
| 214 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 215 | radix_tree_preload_end(); |
| 216 | error = -EEXIST; |
| 217 | goto out_unwind; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 218 | } |
| 219 | spin_unlock(&mp->m_perag_lock); |
| 220 | radix_tree_preload_end(); |
| 221 | } |
| 222 | |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 223 | /* |
| 224 | * If we mount with the inode64 option, or no inode overflows |
| 225 | * the legacy 32-bit address space clear the inode32 option. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | */ |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 227 | agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); |
| 228 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 230 | if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) |
| 231 | mp->m_flags |= XFS_MOUNT_32BITINODES; |
| 232 | else |
| 233 | mp->m_flags &= ~XFS_MOUNT_32BITINODES; |
| 234 | |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 235 | if (mp->m_flags & XFS_MOUNT_32BITINODES) |
Eric Sandeen | 9de67c3 | 2014-07-24 20:51:54 +1000 | [diff] [blame] | 236 | index = xfs_set_inode32(mp, agcount); |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 237 | else |
Eric Sandeen | 9de67c3 | 2014-07-24 20:51:54 +1000 | [diff] [blame] | 238 | index = xfs_set_inode64(mp, agcount); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 239 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 240 | if (maxagi) |
| 241 | *maxagi = index; |
| 242 | return 0; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 243 | |
| 244 | out_unwind: |
| 245 | kmem_free(pag); |
| 246 | for (; index > first_initialised; index--) { |
| 247 | pag = radix_tree_delete(&mp->m_perag_tree, index); |
| 248 | kmem_free(pag); |
| 249 | } |
| 250 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* |
| 254 | * xfs_readsb |
| 255 | * |
| 256 | * Does the initial read of the superblock. |
| 257 | */ |
| 258 | int |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 259 | xfs_readsb( |
| 260 | struct xfs_mount *mp, |
| 261 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
| 263 | unsigned int sector_size; |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 264 | struct xfs_buf *bp; |
| 265 | struct xfs_sb *sbp = &mp->m_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | int error; |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 267 | int loud = !(flags & XFS_MFSI_QUIET); |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 268 | const struct xfs_buf_ops *buf_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | ASSERT(mp->m_sb_bp == NULL); |
| 271 | ASSERT(mp->m_ddev_targp != NULL); |
| 272 | |
| 273 | /* |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 274 | * For the initial read, we must guess at the sector |
| 275 | * size based on the block device. It's enough to |
| 276 | * get the sb_sectsize out of the superblock and |
| 277 | * then reread with the proper length. |
| 278 | * We don't verify it yet, because it may not be complete. |
| 279 | */ |
| 280 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); |
| 281 | buf_ops = NULL; |
| 282 | |
| 283 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | * Allocate a (locked) buffer to hold the superblock. |
| 285 | * This will be kept around at all times to optimize |
| 286 | * access to the superblock. |
| 287 | */ |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 288 | reread: |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 289 | error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
| 290 | BTOBB(sector_size), 0, &bp, buf_ops); |
| 291 | if (error) { |
Dave Chinner | eab4e63 | 2012-11-12 22:54:02 +1100 | [diff] [blame] | 292 | if (loud) |
Dave Chinner | e721f50 | 2013-04-03 16:11:32 +1100 | [diff] [blame] | 293 | xfs_warn(mp, "SB validate failed with error %d.", error); |
Dave Chinner | ac75a1f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 294 | /* bad CRC means corrupted metadata */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 295 | if (error == -EFSBADCRC) |
| 296 | error = -EFSCORRUPTED; |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 297 | return error; |
Dave Chinner | eab4e63 | 2012-11-12 22:54:02 +1100 | [diff] [blame] | 298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | /* |
| 301 | * Initialize the mount structure from the superblock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | */ |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 303 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 304 | |
| 305 | /* |
| 306 | * If we haven't validated the superblock, do so now before we try |
| 307 | * to check the sector size and reread the superblock appropriately. |
| 308 | */ |
| 309 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
| 310 | if (loud) |
| 311 | xfs_warn(mp, "Invalid superblock magic number"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 312 | error = -EINVAL; |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 313 | goto release_buf; |
| 314 | } |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /* |
| 317 | * We must be able to do sector-sized and sector-aligned IO. |
| 318 | */ |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 319 | if (sector_size > sbp->sb_sectsize) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 320 | if (loud) |
| 321 | xfs_warn(mp, "device supports %u byte sectors (not %u)", |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 322 | sector_size, sbp->sb_sectsize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 323 | error = -ENOSYS; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 324 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 327 | if (buf_ops == NULL) { |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 328 | /* |
| 329 | * Re-read the superblock so the buffer is correctly sized, |
| 330 | * and properly verified. |
| 331 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | xfs_buf_relse(bp); |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 333 | sector_size = sbp->sb_sectsize; |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 334 | buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 335 | goto reread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
| 337 | |
Dave Chinner | 5681ca4 | 2015-02-23 21:22:31 +1100 | [diff] [blame] | 338 | xfs_reinit_percpu_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 339 | |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 340 | /* no need to be quiet anymore, so reset the buf ops */ |
| 341 | bp->b_ops = &xfs_sb_buf_ops; |
| 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | mp->m_sb_bp = bp; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 344 | xfs_buf_unlock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return 0; |
| 346 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 347 | release_buf: |
| 348 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | return error; |
| 350 | } |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 353 | * Update alignment values based on mount options and sb values |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 355 | STATIC int |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 356 | xfs_update_alignment(xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | xfs_sb_t *sbp = &(mp->m_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 360 | if (mp->m_dalign) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | /* |
| 362 | * If stripe unit and stripe width are not multiples |
| 363 | * of the fs blocksize turn off alignment. |
| 364 | */ |
| 365 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || |
| 366 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 367 | xfs_warn(mp, |
| 368 | "alignment check failed: sunit/swidth vs. blocksize(%d)", |
| 369 | sbp->sb_blocksize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 370 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } else { |
| 372 | /* |
| 373 | * Convert the stripe unit and width to FSBs. |
| 374 | */ |
| 375 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); |
| 376 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 377 | xfs_warn(mp, |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 378 | "alignment check failed: sunit/swidth vs. agsize(%d)", |
| 379 | sbp->sb_agblocks); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 380 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } else if (mp->m_dalign) { |
| 382 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); |
| 383 | } else { |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 384 | xfs_warn(mp, |
| 385 | "alignment check failed: sunit(%d) less than bsize(%d)", |
| 386 | mp->m_dalign, sbp->sb_blocksize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 387 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Update superblock with new values |
| 393 | * and log changes |
| 394 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 395 | if (xfs_sb_version_hasdalign(sbp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (sbp->sb_unit != mp->m_dalign) { |
| 397 | sbp->sb_unit = mp->m_dalign; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 398 | mp->m_update_sb = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | if (sbp->sb_width != mp->m_swidth) { |
| 401 | sbp->sb_width = mp->m_swidth; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 402 | mp->m_update_sb = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
Jie Liu | 34d7f60 | 2013-05-02 19:27:53 +0800 | [diff] [blame] | 404 | } else { |
| 405 | xfs_warn(mp, |
| 406 | "cannot change alignment: superblock does not support data alignment"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 407 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 410 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | mp->m_dalign = sbp->sb_unit; |
| 412 | mp->m_swidth = sbp->sb_width; |
| 413 | } |
| 414 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Set the maximum inode count for this filesystem |
| 420 | */ |
| 421 | STATIC void |
| 422 | xfs_set_maxicount(xfs_mount_t *mp) |
| 423 | { |
| 424 | xfs_sb_t *sbp = &(mp->m_sb); |
| 425 | __uint64_t icount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
| 427 | if (sbp->sb_imax_pct) { |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 428 | /* |
| 429 | * Make sure the maximum inode count is a multiple |
| 430 | * of the units we allocate inodes in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| 433 | do_div(icount, 100); |
| 434 | do_div(icount, mp->m_ialloc_blks); |
| 435 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << |
| 436 | sbp->sb_inopblog; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 437 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | mp->m_maxicount = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 440 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 442 | /* |
| 443 | * Set the default minimum read and write sizes unless |
| 444 | * already specified in a mount option. |
| 445 | * We use smaller I/O sizes when the file system |
| 446 | * is being used for NFS service (wsync mount option). |
| 447 | */ |
| 448 | STATIC void |
| 449 | xfs_set_rw_sizes(xfs_mount_t *mp) |
| 450 | { |
| 451 | xfs_sb_t *sbp = &(mp->m_sb); |
| 452 | int readio_log, writeio_log; |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
| 455 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 456 | readio_log = XFS_WSYNC_READIO_LOG; |
| 457 | writeio_log = XFS_WSYNC_WRITEIO_LOG; |
| 458 | } else { |
| 459 | readio_log = XFS_READIO_LOG_LARGE; |
| 460 | writeio_log = XFS_WRITEIO_LOG_LARGE; |
| 461 | } |
| 462 | } else { |
| 463 | readio_log = mp->m_readio_log; |
| 464 | writeio_log = mp->m_writeio_log; |
| 465 | } |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | if (sbp->sb_blocklog > readio_log) { |
| 468 | mp->m_readio_log = sbp->sb_blocklog; |
| 469 | } else { |
| 470 | mp->m_readio_log = readio_log; |
| 471 | } |
| 472 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); |
| 473 | if (sbp->sb_blocklog > writeio_log) { |
| 474 | mp->m_writeio_log = sbp->sb_blocklog; |
| 475 | } else { |
| 476 | mp->m_writeio_log = writeio_log; |
| 477 | } |
| 478 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 481 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 482 | * precalculate the low space thresholds for dynamic speculative preallocation. |
| 483 | */ |
| 484 | void |
| 485 | xfs_set_low_space_thresholds( |
| 486 | struct xfs_mount *mp) |
| 487 | { |
| 488 | int i; |
| 489 | |
| 490 | for (i = 0; i < XFS_LOWSP_MAX; i++) { |
| 491 | __uint64_t space = mp->m_sb.sb_dblocks; |
| 492 | |
| 493 | do_div(space, 100); |
| 494 | mp->m_low_space[i] = space * (i + 1); |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | |
| 499 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 500 | * Set whether we're using inode alignment. |
| 501 | */ |
| 502 | STATIC void |
| 503 | xfs_set_inoalignment(xfs_mount_t *mp) |
| 504 | { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 505 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | mp->m_sb.sb_inoalignmt >= |
| 507 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) |
| 508 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; |
| 509 | else |
| 510 | mp->m_inoalign_mask = 0; |
| 511 | /* |
| 512 | * If we are using stripe alignment, check whether |
| 513 | * the stripe unit is a multiple of the inode alignment |
| 514 | */ |
| 515 | if (mp->m_dalign && mp->m_inoalign_mask && |
| 516 | !(mp->m_dalign & mp->m_inoalign_mask)) |
| 517 | mp->m_sinoalign = mp->m_dalign; |
| 518 | else |
| 519 | mp->m_sinoalign = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | /* |
Zhi Yong Wu | 0471f62 | 2013-08-07 10:10:58 +0000 | [diff] [blame] | 523 | * Check that the data (and log if separate) is an ok size. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 524 | */ |
| 525 | STATIC int |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 526 | xfs_check_sizes( |
| 527 | struct xfs_mount *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 528 | { |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 529 | struct xfs_buf *bp; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 530 | xfs_daddr_t d; |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 531 | int error; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
| 534 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 535 | xfs_warn(mp, "filesystem size mismatch detected"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 536 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 538 | error = xfs_buf_read_uncached(mp->m_ddev_targp, |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 539 | d - XFS_FSS_TO_BB(mp, 1), |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 540 | XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); |
| 541 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 542 | xfs_warn(mp, "last sector read failed"); |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 543 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 545 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 547 | if (mp->m_logdev_targp == mp->m_ddev_targp) |
| 548 | return 0; |
| 549 | |
| 550 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); |
| 551 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { |
| 552 | xfs_warn(mp, "log size mismatch detected"); |
| 553 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 555 | error = xfs_buf_read_uncached(mp->m_logdev_targp, |
| 556 | d - XFS_FSB_TO_BB(mp, 1), |
| 557 | XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); |
| 558 | if (error) { |
| 559 | xfs_warn(mp, "log device read failed"); |
| 560 | return error; |
| 561 | } |
| 562 | xfs_buf_relse(bp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | /* |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 567 | * Clear the quotaflags in memory and in the superblock. |
| 568 | */ |
| 569 | int |
| 570 | xfs_mount_reset_sbqflags( |
| 571 | struct xfs_mount *mp) |
| 572 | { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 573 | mp->m_qflags = 0; |
| 574 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 575 | /* It is OK to look at sb_qflags in the mount path without m_sb_lock. */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 576 | if (mp->m_sb.sb_qflags == 0) |
| 577 | return 0; |
| 578 | spin_lock(&mp->m_sb_lock); |
| 579 | mp->m_sb.sb_qflags = 0; |
| 580 | spin_unlock(&mp->m_sb_lock); |
| 581 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 582 | if (!xfs_fs_writable(mp, SB_FREEZE_WRITE)) |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 583 | return 0; |
| 584 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 585 | return xfs_sync_sb(mp, false); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 588 | __uint64_t |
| 589 | xfs_default_resblks(xfs_mount_t *mp) |
| 590 | { |
| 591 | __uint64_t resblks; |
| 592 | |
| 593 | /* |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 594 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
| 595 | * smaller. This is intended to cover concurrent allocation |
| 596 | * transactions when we initially hit enospc. These each require a 4 |
| 597 | * block reservation. Hence by default we cover roughly 2000 concurrent |
| 598 | * allocation reservations. |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 599 | */ |
| 600 | resblks = mp->m_sb.sb_dblocks; |
| 601 | do_div(resblks, 20); |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 602 | resblks = min_t(__uint64_t, resblks, 8192); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 603 | return resblks; |
| 604 | } |
| 605 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 606 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 607 | * This function does the following on an initial mount of a file system: |
| 608 | * - reads the superblock from disk and init the mount struct |
| 609 | * - if we're a 32-bit kernel, do a size check on the superblock |
| 610 | * so we don't mount terabyte filesystems |
| 611 | * - init mount struct realtime fields |
| 612 | * - allocate inode hash table for fs |
| 613 | * - init directory manager |
| 614 | * - perform recovery and init the log manager |
| 615 | */ |
| 616 | int |
| 617 | xfs_mountfs( |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 618 | xfs_mount_t *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 619 | { |
| 620 | xfs_sb_t *sbp = &(mp->m_sb); |
| 621 | xfs_inode_t *rip; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 622 | __uint64_t resblks; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 623 | uint quotamount = 0; |
| 624 | uint quotaflags = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 625 | int error = 0; |
| 626 | |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 627 | xfs_sb_mount_common(mp, sbp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 628 | |
| 629 | /* |
Dave Chinner | 074e427 | 2015-01-22 09:10:33 +1100 | [diff] [blame] | 630 | * Check for a mismatched features2 values. Older kernels read & wrote |
| 631 | * into the wrong sb offset for sb_features2 on some platforms due to |
| 632 | * xfs_sb_t not being 64bit size aligned when sb_features2 was added, |
| 633 | * which made older superblock reading/writing routines swap it as a |
| 634 | * 64-bit value. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 635 | * |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 636 | * For backwards compatibility, we make both slots equal. |
| 637 | * |
Dave Chinner | 074e427 | 2015-01-22 09:10:33 +1100 | [diff] [blame] | 638 | * If we detect a mismatched field, we OR the set bits into the existing |
| 639 | * features2 field in case it has already been modified; we don't want |
| 640 | * to lose any features. We then update the bad location with the ORed |
| 641 | * value so that older kernels will see any features2 flags. The |
| 642 | * superblock writeback code ensures the new sb_features2 is copied to |
| 643 | * sb_bad_features2 before it is logged or written to disk. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 644 | */ |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 645 | if (xfs_sb_has_mismatched_features2(sbp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 646 | xfs_warn(mp, "correcting sb_features alignment problem"); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 647 | sbp->sb_features2 |= sbp->sb_bad_features2; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 648 | mp->m_update_sb = true; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 649 | |
| 650 | /* |
| 651 | * Re-check for ATTR2 in case it was found in bad_features2 |
| 652 | * slot. |
| 653 | */ |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 654 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 655 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 656 | mp->m_flags |= XFS_MOUNT_ATTR2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 657 | } |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 658 | |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 659 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 660 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { |
| 661 | xfs_sb_version_removeattr2(&mp->m_sb); |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 662 | mp->m_update_sb = true; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 663 | |
| 664 | /* update sb_versionnum for the clearing of the morebits */ |
| 665 | if (!sbp->sb_features2) |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 666 | mp->m_update_sb = true; |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 667 | } |
| 668 | |
Dave Chinner | 263997a | 2014-05-20 07:46:40 +1000 | [diff] [blame] | 669 | /* always use v2 inodes by default now */ |
| 670 | if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) { |
| 671 | mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 672 | mp->m_update_sb = true; |
Dave Chinner | 263997a | 2014-05-20 07:46:40 +1000 | [diff] [blame] | 673 | } |
| 674 | |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 675 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 676 | * Check if sb_agblocks is aligned at stripe boundary |
| 677 | * If sb_agblocks is NOT aligned turn off m_dalign since |
| 678 | * allocator alignment is within an ag, therefore ag has |
| 679 | * to be aligned at stripe boundary. |
| 680 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 681 | error = xfs_update_alignment(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 682 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 683 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 684 | |
| 685 | xfs_alloc_compute_maxlevels(mp); |
| 686 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); |
| 687 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); |
| 688 | xfs_ialloc_compute_maxlevels(mp); |
| 689 | |
| 690 | xfs_set_maxicount(mp); |
| 691 | |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 692 | error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 693 | if (error) |
| 694 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 695 | |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 696 | error = xfs_uuid_mount(mp); |
| 697 | if (error) |
| 698 | goto out_remove_sysfs; |
| 699 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 700 | /* |
| 701 | * Set the minimum read and write sizes |
| 702 | */ |
| 703 | xfs_set_rw_sizes(mp); |
| 704 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 705 | /* set the low space thresholds for dynamic preallocation */ |
| 706 | xfs_set_low_space_thresholds(mp); |
| 707 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 708 | /* |
| 709 | * Set the inode cluster size. |
| 710 | * This may still be overridden by the file system |
| 711 | * block size if it is larger than the chosen cluster size. |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 712 | * |
| 713 | * For v5 filesystems, scale the cluster size with the inode size to |
| 714 | * keep a constant ratio of inode per cluster buffer, but only if mkfs |
| 715 | * has set the inode alignment value appropriately for larger cluster |
| 716 | * sizes. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 717 | */ |
| 718 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 719 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 720 | int new_size = mp->m_inode_cluster_size; |
| 721 | |
| 722 | new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE; |
| 723 | if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size)) |
| 724 | mp->m_inode_cluster_size = new_size; |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 725 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 726 | |
| 727 | /* |
| 728 | * Set inode alignment fields |
| 729 | */ |
| 730 | xfs_set_inoalignment(mp); |
| 731 | |
| 732 | /* |
Zhi Yong Wu | c2bfbc9 | 2013-08-12 03:15:03 +0000 | [diff] [blame] | 733 | * Check that the data (and log if separate) is an ok size. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 734 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 735 | error = xfs_check_sizes(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 736 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 737 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
| 739 | /* |
| 740 | * Initialize realtime fields in the mount structure |
| 741 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 742 | error = xfs_rtmount_init(mp); |
| 743 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 744 | xfs_warn(mp, "RT mount failed"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 745 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | * Copies the low order bits of the timestamp and the randomly |
| 750 | * set "sequence" number out of a UUID. |
| 751 | */ |
| 752 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); |
| 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
| 755 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 756 | error = xfs_da_mount(mp); |
| 757 | if (error) { |
| 758 | xfs_warn(mp, "Failed dir/attr init: %d", error); |
| 759 | goto out_remove_uuid; |
| 760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
| 762 | /* |
| 763 | * Initialize the precomputed transaction reservations values. |
| 764 | */ |
| 765 | xfs_trans_init(mp); |
| 766 | |
| 767 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | * Allocate and initialize the per-ag data. |
| 769 | */ |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 770 | spin_lock_init(&mp->m_perag_lock); |
Dave Chinner | 9b98b6f | 2010-05-27 01:58:13 +0000 | [diff] [blame] | 771 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 772 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
| 773 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 774 | xfs_warn(mp, "Failed per-ag init: %d", error); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 775 | goto out_free_dir; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 778 | if (!sbp->sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 779 | xfs_warn(mp, "no log defined"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 780 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 781 | error = -EFSCORRUPTED; |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 782 | goto out_free_perag; |
| 783 | } |
| 784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | /* |
| 786 | * log's mount-time initialization. Perform 1st part recovery if needed |
| 787 | */ |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 788 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
| 789 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), |
| 790 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); |
| 791 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 792 | xfs_warn(mp, "log mount failed"); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 793 | goto out_fail_wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | /* |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 797 | * Now the log is mounted, we know if it was an unclean shutdown or |
| 798 | * not. If it was, with the first phase of recovery has completed, we |
| 799 | * have consistent AG blocks on disk. We have not recovered EFIs yet, |
| 800 | * but they are recovered transactionally in the second recovery phase |
| 801 | * later. |
| 802 | * |
| 803 | * Hence we can safely re-initialise incore superblock counters from |
| 804 | * the per-ag data. These may not be correct if the filesystem was not |
| 805 | * cleanly unmounted, so we need to wait for recovery to finish before |
| 806 | * doing this. |
| 807 | * |
| 808 | * If the filesystem was cleanly unmounted, then we can trust the |
| 809 | * values in the superblock to be correct and we don't need to do |
| 810 | * anything here. |
| 811 | * |
| 812 | * If we are currently making the filesystem, the initialisation will |
| 813 | * fail as the perag data is in an undefined state. |
| 814 | */ |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 815 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
| 816 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && |
| 817 | !mp->m_sb.sb_inprogress) { |
| 818 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 819 | if (error) |
kbuild test robot | 6eee897 | 2014-08-04 13:49:40 +1000 | [diff] [blame] | 820 | goto out_log_dealloc; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 821 | } |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 822 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 823 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | * Get and sanity-check the root inode. |
| 825 | * Save the pointer to it in the mount structure. |
| 826 | */ |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 827 | 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] | 828 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 829 | xfs_warn(mp, "failed to read root inode"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 830 | goto out_log_dealloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | ASSERT(rip != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
Al Viro | abbede1 | 2011-07-26 02:31:30 -0400 | [diff] [blame] | 835 | if (unlikely(!S_ISDIR(rip->i_d.di_mode))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 836 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
Nathan Scott | b657452 | 2006-06-09 15:29:40 +1000 | [diff] [blame] | 837 | (unsigned long long)rip->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 839 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, |
| 840 | mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 841 | error = -EFSCORRUPTED; |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 842 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | mp->m_rootip = rip; /* save it */ |
| 845 | |
| 846 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 847 | |
| 848 | /* |
| 849 | * Initialize realtime inode pointers in the mount structure |
| 850 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 851 | error = xfs_rtmount_inodes(mp); |
| 852 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | /* |
| 854 | * Free up the root inode. |
| 855 | */ |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 856 | xfs_warn(mp, "failed to read RT inodes"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 857 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | /* |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 861 | * If this is a read-only mount defer the superblock updates until |
| 862 | * the next remount into writeable mode. Otherwise we would never |
| 863 | * perform the update e.g. for the root filesystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | */ |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 865 | if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 866 | error = xfs_sync_sb(mp, false); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 867 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 868 | xfs_warn(mp, "failed to write sb changes"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 869 | goto out_rtunmount; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 870 | } |
| 871 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | /* |
| 874 | * Initialise the XFS quota management subsystem for this mount |
| 875 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 876 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
| 877 | error = xfs_qm_newmount(mp, "amount, "aflags); |
| 878 | if (error) |
| 879 | goto out_rtunmount; |
| 880 | } else { |
| 881 | ASSERT(!XFS_IS_QUOTA_ON(mp)); |
| 882 | |
| 883 | /* |
| 884 | * If a file system had quotas running earlier, but decided to |
| 885 | * mount without -o uquota/pquota/gquota options, revoke the |
| 886 | * quotachecked license. |
| 887 | */ |
| 888 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 889 | xfs_notice(mp, "resetting quota flags"); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 890 | error = xfs_mount_reset_sbqflags(mp); |
| 891 | if (error) |
Brian Foster | a70a4fa | 2014-07-15 07:41:25 +1000 | [diff] [blame] | 892 | goto out_rtunmount; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 893 | } |
| 894 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
| 896 | /* |
| 897 | * Finish recovering the file system. This part needed to be |
| 898 | * delayed until after the root and real-time bitmap inodes |
| 899 | * were consistently read in. |
| 900 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 901 | error = xfs_log_mount_finish(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 903 | xfs_warn(mp, "log mount finish failed"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 904 | goto out_rtunmount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Complete the quota initialisation, post-log-replay component. |
| 909 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 910 | if (quotamount) { |
| 911 | ASSERT(mp->m_qflags == 0); |
| 912 | mp->m_qflags = quotaflags; |
| 913 | |
| 914 | xfs_qm_mount_quotas(mp); |
| 915 | } |
| 916 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 917 | /* |
| 918 | * Now we are mounted, reserve a small amount of unused space for |
| 919 | * privileged transactions. This is needed so that transaction |
| 920 | * space required for critical operations can dip into this pool |
| 921 | * when at ENOSPC. This is needed for operations like create with |
| 922 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations |
| 923 | * are not allowed to use this reserved space. |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 924 | * |
| 925 | * This may drive us straight to ENOSPC on mount, but that implies |
| 926 | * we were already there on the last unmount. Warn if this occurs. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 927 | */ |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 928 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 929 | resblks = xfs_default_resblks(mp); |
| 930 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 931 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 932 | xfs_warn(mp, |
| 933 | "Unable to allocate reserve blocks. Continuing without reserve pool."); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 934 | } |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 935 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | return 0; |
| 937 | |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 938 | out_rtunmount: |
| 939 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 940 | out_rele_rip: |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 941 | IRELE(rip); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 942 | out_log_dealloc: |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 943 | xfs_log_unmount(mp); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 944 | out_fail_wait: |
| 945 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) |
| 946 | xfs_wait_buftarg(mp->m_logdev_targp); |
| 947 | xfs_wait_buftarg(mp->m_ddev_targp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 948 | out_free_perag: |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 949 | xfs_free_perag(mp); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 950 | out_free_dir: |
| 951 | xfs_da_unmount(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 952 | out_remove_uuid: |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 953 | xfs_uuid_unmount(mp); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 954 | out_remove_sysfs: |
| 955 | xfs_sysfs_del(&mp->m_kobj); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 956 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | return error; |
| 958 | } |
| 959 | |
| 960 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | * This flushes out the inodes,dquots and the superblock, unmounts the |
| 962 | * log and makes sure that incore structures are freed. |
| 963 | */ |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 964 | void |
| 965 | xfs_unmountfs( |
| 966 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | { |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 968 | __uint64_t resblks; |
| 969 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Brian Foster | 579b62f | 2012-11-06 09:50:47 -0500 | [diff] [blame] | 971 | cancel_delayed_work_sync(&mp->m_eofblocks_work); |
| 972 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 973 | xfs_qm_unmount_quotas(mp); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 974 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | 77508ec | 2008-08-13 16:49:04 +1000 | [diff] [blame] | 975 | IRELE(mp->m_rootip); |
| 976 | |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 977 | /* |
| 978 | * We can potentially deadlock here if we have an inode cluster |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 979 | * that has been freed has its buffer still pinned in memory because |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 980 | * the transaction is still sitting in a iclog. The stale inodes |
| 981 | * on that buffer will have their flush locks held until the |
| 982 | * transaction hits the disk and the callbacks run. the inode |
| 983 | * flush takes the flush lock unconditionally and with nothing to |
| 984 | * push out the iclog we will never get that unlocked. hence we |
| 985 | * need to force the log first. |
| 986 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 987 | xfs_log_force(mp, XFS_LOG_SYNC); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 988 | |
| 989 | /* |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 990 | * Flush all pending changes from the AIL. |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 991 | */ |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 992 | xfs_ail_push_all_sync(mp->m_ail); |
| 993 | |
| 994 | /* |
| 995 | * And reclaim all inodes. At this point there should be no dirty |
Dave Chinner | 7e18530 | 2012-10-08 21:56:00 +1100 | [diff] [blame] | 996 | * inodes and none should be pinned or locked, but use synchronous |
| 997 | * reclaim just to be sure. We can stop background inode reclaim |
| 998 | * here as well if it is still running. |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 999 | */ |
Dave Chinner | 7e18530 | 2012-10-08 21:56:00 +1100 | [diff] [blame] | 1000 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1001 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1003 | xfs_qm_unmount(mp); |
Lachlan McIlroy | a357a12 | 2008-10-30 16:53:25 +1100 | [diff] [blame] | 1004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | /* |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1006 | * Unreserve any blocks we have so that when we unmount we don't account |
| 1007 | * the reserved free space as used. This is really only necessary for |
| 1008 | * lazy superblock counting because it trusts the incore superblock |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1009 | * counters to be absolutely correct on clean unmount. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1010 | * |
| 1011 | * We don't bother correcting this elsewhere for lazy superblock |
| 1012 | * counting because on mount of an unclean filesystem we reconstruct the |
| 1013 | * correct counter value and this is irrelevant. |
| 1014 | * |
| 1015 | * For non-lazy counter filesystems, this doesn't matter at all because |
| 1016 | * we only every apply deltas to the superblock and hence the incore |
| 1017 | * value does not matter.... |
| 1018 | */ |
| 1019 | resblks = 0; |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1020 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1021 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1022 | xfs_warn(mp, "Unable to free reserved block pool. " |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1023 | "Freespace may not be correct on next mount."); |
| 1024 | |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1025 | error = xfs_log_sbcount(mp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1026 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1027 | xfs_warn(mp, "Unable to update superblock counters. " |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1028 | "Freespace may not be correct on next mount."); |
Christoph Hellwig | 87c7bec | 2011-09-14 14:08:26 +0000 | [diff] [blame] | 1029 | |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1030 | xfs_log_unmount(mp); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 1031 | xfs_da_unmount(mp); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1032 | xfs_uuid_unmount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
Christoph Hellwig | 1550d0b | 2008-08-13 16:17:37 +1000 | [diff] [blame] | 1034 | #if defined(DEBUG) |
Christoph Hellwig | 0ce4cfd | 2007-08-30 17:20:53 +1000 | [diff] [blame] | 1035 | xfs_errortag_clearall(mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | #endif |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1037 | xfs_free_perag(mp); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 1038 | |
| 1039 | xfs_sysfs_del(&mp->m_kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1042 | /* |
| 1043 | * Determine whether modifications can proceed. The caller specifies the minimum |
| 1044 | * freeze level for which modifications should not be allowed. This allows |
| 1045 | * certain operations to proceed while the freeze sequence is in progress, if |
| 1046 | * necessary. |
| 1047 | */ |
| 1048 | bool |
| 1049 | xfs_fs_writable( |
| 1050 | struct xfs_mount *mp, |
| 1051 | int level) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1052 | { |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1053 | ASSERT(level > SB_UNFROZEN); |
| 1054 | if ((mp->m_super->s_writers.frozen >= level) || |
| 1055 | XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY)) |
| 1056 | return false; |
| 1057 | |
| 1058 | return true; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | /* |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1062 | * xfs_log_sbcount |
| 1063 | * |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1064 | * Sync the superblock counters to disk. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1065 | * |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1066 | * Note this code can be called during the process of freezing, so we use the |
| 1067 | * transaction allocator that does not block when the transaction subsystem is |
| 1068 | * in its frozen state. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1069 | */ |
| 1070 | int |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1071 | xfs_log_sbcount(xfs_mount_t *mp) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1072 | { |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1073 | /* allow this to proceed during the freeze sequence... */ |
| 1074 | if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE)) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1075 | return 0; |
| 1076 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1077 | /* |
| 1078 | * we don't need to do this if we are updating the superblock |
| 1079 | * counters on every modification. |
| 1080 | */ |
| 1081 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 1082 | return 0; |
| 1083 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 1084 | return xfs_sync_sb(mp, true); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1085 | } |
| 1086 | |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1087 | /* |
| 1088 | * Deltas for the inode count are +/-64, hence we use a large batch size |
| 1089 | * of 128 so we don't need to take the counter lock on every update. |
| 1090 | */ |
| 1091 | #define XFS_ICOUNT_BATCH 128 |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 1092 | int |
| 1093 | xfs_mod_icount( |
| 1094 | struct xfs_mount *mp, |
| 1095 | int64_t delta) |
| 1096 | { |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1097 | __percpu_counter_add(&mp->m_icount, delta, XFS_ICOUNT_BATCH); |
| 1098 | if (__percpu_counter_compare(&mp->m_icount, 0, XFS_ICOUNT_BATCH) < 0) { |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 1099 | ASSERT(0); |
| 1100 | percpu_counter_add(&mp->m_icount, -delta); |
| 1101 | return -EINVAL; |
| 1102 | } |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
Dave Chinner | e88b64e | 2015-02-23 21:19:53 +1100 | [diff] [blame] | 1106 | int |
| 1107 | xfs_mod_ifree( |
| 1108 | struct xfs_mount *mp, |
| 1109 | int64_t delta) |
| 1110 | { |
| 1111 | percpu_counter_add(&mp->m_ifree, delta); |
| 1112 | if (percpu_counter_compare(&mp->m_ifree, 0) < 0) { |
| 1113 | ASSERT(0); |
| 1114 | percpu_counter_add(&mp->m_ifree, -delta); |
| 1115 | return -EINVAL; |
| 1116 | } |
| 1117 | return 0; |
| 1118 | } |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1119 | |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1120 | /* |
| 1121 | * Deltas for the block count can vary from 1 to very large, but lock contention |
| 1122 | * only occurs on frequent small block count updates such as in the delayed |
| 1123 | * allocation path for buffered writes (page a time updates). Hence we set |
| 1124 | * a large batch count (1024) to minimise global counter updates except when |
| 1125 | * we get near to ENOSPC and we have to be very accurate with our updates. |
| 1126 | */ |
| 1127 | #define XFS_FDBLOCKS_BATCH 1024 |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1128 | int |
| 1129 | xfs_mod_fdblocks( |
| 1130 | struct xfs_mount *mp, |
| 1131 | int64_t delta, |
| 1132 | bool rsvd) |
| 1133 | { |
| 1134 | int64_t lcounter; |
| 1135 | long long res_used; |
| 1136 | s32 batch; |
| 1137 | |
| 1138 | if (delta > 0) { |
| 1139 | /* |
| 1140 | * If the reserve pool is depleted, put blocks back into it |
| 1141 | * first. Most of the time the pool is full. |
| 1142 | */ |
| 1143 | if (likely(mp->m_resblks == mp->m_resblks_avail)) { |
| 1144 | percpu_counter_add(&mp->m_fdblocks, delta); |
| 1145 | return 0; |
| 1146 | } |
| 1147 | |
| 1148 | spin_lock(&mp->m_sb_lock); |
| 1149 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); |
| 1150 | |
| 1151 | if (res_used > delta) { |
| 1152 | mp->m_resblks_avail += delta; |
| 1153 | } else { |
| 1154 | delta -= res_used; |
| 1155 | mp->m_resblks_avail = mp->m_resblks; |
| 1156 | percpu_counter_add(&mp->m_fdblocks, delta); |
| 1157 | } |
| 1158 | spin_unlock(&mp->m_sb_lock); |
| 1159 | return 0; |
| 1160 | } |
| 1161 | |
| 1162 | /* |
| 1163 | * Taking blocks away, need to be more accurate the closer we |
| 1164 | * are to zero. |
| 1165 | * |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1166 | * If the counter has a value of less than 2 * max batch size, |
| 1167 | * then make everything serialise as we are real close to |
| 1168 | * ENOSPC. |
| 1169 | */ |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1170 | if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH, |
| 1171 | XFS_FDBLOCKS_BATCH) < 0) |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1172 | batch = 1; |
| 1173 | else |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1174 | batch = XFS_FDBLOCKS_BATCH; |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1175 | |
| 1176 | __percpu_counter_add(&mp->m_fdblocks, delta, batch); |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1177 | if (__percpu_counter_compare(&mp->m_fdblocks, XFS_ALLOC_SET_ASIDE(mp), |
| 1178 | XFS_FDBLOCKS_BATCH) >= 0) { |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1179 | /* we had space! */ |
| 1180 | return 0; |
| 1181 | } |
| 1182 | |
| 1183 | /* |
| 1184 | * lock up the sb for dipping into reserves before releasing the space |
| 1185 | * that took us to ENOSPC. |
| 1186 | */ |
| 1187 | spin_lock(&mp->m_sb_lock); |
| 1188 | percpu_counter_add(&mp->m_fdblocks, -delta); |
| 1189 | if (!rsvd) |
| 1190 | goto fdblocks_enospc; |
| 1191 | |
| 1192 | lcounter = (long long)mp->m_resblks_avail + delta; |
| 1193 | if (lcounter >= 0) { |
| 1194 | mp->m_resblks_avail = lcounter; |
| 1195 | spin_unlock(&mp->m_sb_lock); |
| 1196 | return 0; |
| 1197 | } |
| 1198 | printk_once(KERN_WARNING |
| 1199 | "Filesystem \"%s\": reserve blocks depleted! " |
| 1200 | "Consider increasing reserve pool size.", |
| 1201 | mp->m_fsname); |
| 1202 | fdblocks_enospc: |
| 1203 | spin_unlock(&mp->m_sb_lock); |
| 1204 | return -ENOSPC; |
| 1205 | } |
| 1206 | |
Dave Chinner | bab98bb | 2015-02-23 21:22:54 +1100 | [diff] [blame] | 1207 | int |
| 1208 | xfs_mod_frextents( |
| 1209 | struct xfs_mount *mp, |
| 1210 | int64_t delta) |
| 1211 | { |
| 1212 | int64_t lcounter; |
| 1213 | int ret = 0; |
| 1214 | |
| 1215 | spin_lock(&mp->m_sb_lock); |
| 1216 | lcounter = mp->m_sb.sb_frextents + delta; |
| 1217 | if (lcounter < 0) |
| 1218 | ret = -ENOSPC; |
| 1219 | else |
| 1220 | mp->m_sb.sb_frextents = lcounter; |
| 1221 | spin_unlock(&mp->m_sb_lock); |
| 1222 | return ret; |
| 1223 | } |
| 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | * xfs_getsb() is called to obtain the buffer for the superblock. |
| 1227 | * The buffer is returned locked and read in from disk. |
| 1228 | * The buffer should be released with a call to xfs_brelse(). |
| 1229 | * |
| 1230 | * If the flags parameter is BUF_TRYLOCK, then we'll only return |
| 1231 | * the superblock buffer if it can be locked without sleeping. |
| 1232 | * If it can't then we'll return NULL. |
| 1233 | */ |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1234 | struct xfs_buf * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | xfs_getsb( |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1236 | struct xfs_mount *mp, |
| 1237 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | { |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1239 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1241 | if (!xfs_buf_trylock(bp)) { |
| 1242 | if (flags & XBF_TRYLOCK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | return NULL; |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1244 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | } |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1246 | |
Chandra Seetharaman | 72790aa | 2011-07-22 23:40:04 +0000 | [diff] [blame] | 1247 | xfs_buf_hold(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | ASSERT(XFS_BUF_ISDONE(bp)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1249 | return bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
| 1252 | /* |
| 1253 | * Used to free the superblock along various error paths. |
| 1254 | */ |
| 1255 | void |
| 1256 | xfs_freesb( |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1257 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | { |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1259 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1261 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | mp->m_sb_bp = NULL; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1263 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | /* |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1267 | * If the underlying (data/log/rt) device is readonly, there are some |
| 1268 | * operations that cannot proceed. |
| 1269 | */ |
| 1270 | int |
| 1271 | xfs_dev_is_read_only( |
| 1272 | struct xfs_mount *mp, |
| 1273 | char *message) |
| 1274 | { |
| 1275 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || |
| 1276 | xfs_readonly_buftarg(mp->m_logdev_targp) || |
| 1277 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1278 | xfs_notice(mp, "%s required on read-only device.", message); |
| 1279 | xfs_notice(mp, "write access unavailable, cannot proceed."); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1280 | return -EROFS; |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1281 | } |
| 1282 | return 0; |
| 1283 | } |