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 | 70a9883 | 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 | |
Darrick J. Wong | af3b638 | 2015-11-03 13:06:34 +1100 | [diff] [blame] | 50 | void |
| 51 | xfs_uuid_table_free(void) |
| 52 | { |
| 53 | if (xfs_uuid_table_size == 0) |
| 54 | return; |
| 55 | kmem_free(xfs_uuid_table); |
| 56 | xfs_uuid_table = NULL; |
| 57 | xfs_uuid_table_size = 0; |
| 58 | } |
| 59 | |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 60 | /* |
| 61 | * See if the UUID is unique among mounted XFS filesystems. |
| 62 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. |
| 63 | */ |
| 64 | STATIC int |
| 65 | xfs_uuid_mount( |
| 66 | struct xfs_mount *mp) |
| 67 | { |
| 68 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 69 | int hole, i; |
| 70 | |
| 71 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 72 | return 0; |
| 73 | |
| 74 | if (uuid_is_nil(uuid)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 75 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 76 | return -EINVAL; |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | mutex_lock(&xfs_uuid_table_mutex); |
| 80 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { |
| 81 | if (uuid_is_nil(&xfs_uuid_table[i])) { |
| 82 | hole = i; |
| 83 | continue; |
| 84 | } |
| 85 | if (uuid_equal(uuid, &xfs_uuid_table[i])) |
| 86 | goto out_duplicate; |
| 87 | } |
| 88 | |
| 89 | if (hole < 0) { |
| 90 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, |
| 91 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 92 | KM_SLEEP); |
| 93 | hole = xfs_uuid_table_size++; |
| 94 | } |
| 95 | xfs_uuid_table[hole] = *uuid; |
| 96 | mutex_unlock(&xfs_uuid_table_mutex); |
| 97 | |
| 98 | return 0; |
| 99 | |
| 100 | out_duplicate: |
| 101 | mutex_unlock(&xfs_uuid_table_mutex); |
Mitsuo Hayasaka | 021000e | 2012-01-13 05:58:39 +0000 | [diff] [blame] | 102 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 103 | return -EINVAL; |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | STATIC void |
| 107 | xfs_uuid_unmount( |
| 108 | struct xfs_mount *mp) |
| 109 | { |
| 110 | uuid_t *uuid = &mp->m_sb.sb_uuid; |
| 111 | int i; |
| 112 | |
| 113 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
| 114 | return; |
| 115 | |
| 116 | mutex_lock(&xfs_uuid_table_mutex); |
| 117 | for (i = 0; i < xfs_uuid_table_size; i++) { |
| 118 | if (uuid_is_nil(&xfs_uuid_table[i])) |
| 119 | continue; |
| 120 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) |
| 121 | continue; |
| 122 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); |
| 123 | break; |
| 124 | } |
| 125 | ASSERT(i < xfs_uuid_table_size); |
| 126 | mutex_unlock(&xfs_uuid_table_mutex); |
| 127 | } |
| 128 | |
| 129 | |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 130 | STATIC void |
| 131 | __xfs_free_perag( |
| 132 | struct rcu_head *head) |
| 133 | { |
| 134 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); |
| 135 | |
| 136 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
| 137 | kmem_free(pag); |
| 138 | } |
| 139 | |
Dave Chinner | 0fa800f | 2010-01-11 11:47:46 +0000 | [diff] [blame] | 140 | /* |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 141 | * Free up the per-ag resources associated with the mount structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | */ |
Christoph Hellwig | c962fb7 | 2008-05-20 15:10:52 +1000 | [diff] [blame] | 143 | STATIC void |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 144 | xfs_free_perag( |
Christoph Hellwig | 745f691 | 2007-08-30 17:20:39 +1000 | [diff] [blame] | 145 | xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 147 | xfs_agnumber_t agno; |
| 148 | struct xfs_perag *pag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 150 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { |
| 151 | spin_lock(&mp->m_perag_lock); |
| 152 | pag = radix_tree_delete(&mp->m_perag_tree, agno); |
| 153 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 154 | ASSERT(pag); |
Dave Chinner | f83282a | 2010-11-08 08:55:04 +0000 | [diff] [blame] | 155 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
Dave Chinner | e176579 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 156 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 160 | /* |
| 161 | * Check size of device based on the (data/realtime) block count. |
| 162 | * Note: this check is used by the growfs code as well as mount. |
| 163 | */ |
| 164 | int |
| 165 | xfs_sb_validate_fsb_count( |
| 166 | xfs_sb_t *sbp, |
| 167 | __uint64_t nblocks) |
| 168 | { |
| 169 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); |
| 170 | ASSERT(sbp->sb_blocklog >= BBSHIFT); |
| 171 | |
Christoph Hellwig | d5cf09b | 2014-07-30 09:12:05 +1000 | [diff] [blame] | 172 | /* Limited by ULONG_MAX of page cache index */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 173 | if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 174 | return -EFBIG; |
Nathan Scott | 4cc929e | 2007-05-14 18:24:02 +1000 | [diff] [blame] | 175 | return 0; |
| 176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 178 | int |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 179 | xfs_initialize_perag( |
Nathan Scott | c11e2c3 | 2005-11-02 15:11:45 +1100 | [diff] [blame] | 180 | xfs_mount_t *mp, |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 181 | xfs_agnumber_t agcount, |
| 182 | xfs_agnumber_t *maxagi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
Carlos Maiolino | 2d2194f | 2012-09-20 10:32:38 -0300 | [diff] [blame] | 184 | xfs_agnumber_t index; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 185 | xfs_agnumber_t first_initialised = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | xfs_perag_t *pag; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 187 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 189 | /* |
| 190 | * Walk the current per-ag tree so we don't try to initialise AGs |
| 191 | * that already exist (growfs case). Allocate and insert all the |
| 192 | * AGs we don't find ready for initialisation. |
| 193 | */ |
| 194 | for (index = 0; index < agcount; index++) { |
| 195 | pag = xfs_perag_get(mp, index); |
| 196 | if (pag) { |
| 197 | xfs_perag_put(pag); |
| 198 | continue; |
| 199 | } |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 200 | if (!first_initialised) |
| 201 | first_initialised = index; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 202 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 203 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
| 204 | if (!pag) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 205 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 206 | pag->pag_agno = index; |
| 207 | pag->pag_mount = mp; |
Dave Chinner | 1a427ab | 2010-12-16 17:08:41 +1100 | [diff] [blame] | 208 | spin_lock_init(&pag->pag_ici_lock); |
Dave Chinner | 69b491c | 2010-09-27 11:09:51 +1000 | [diff] [blame] | 209 | mutex_init(&pag->pag_ici_reclaim_lock); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 210 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
Dave Chinner | 74f75a0 | 2010-09-24 19:59:04 +1000 | [diff] [blame] | 211 | spin_lock_init(&pag->pag_buf_lock); |
| 212 | pag->pag_buf_tree = RB_ROOT; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 213 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 214 | if (radix_tree_preload(GFP_NOFS)) |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 215 | goto out_unwind; |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 216 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 217 | spin_lock(&mp->m_perag_lock); |
| 218 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { |
| 219 | BUG(); |
| 220 | spin_unlock(&mp->m_perag_lock); |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 221 | radix_tree_preload_end(); |
| 222 | error = -EEXIST; |
| 223 | goto out_unwind; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 224 | } |
| 225 | spin_unlock(&mp->m_perag_lock); |
| 226 | radix_tree_preload_end(); |
| 227 | } |
| 228 | |
Eric Sandeen | 12c3f05 | 2016-03-02 09:58:09 +1100 | [diff] [blame] | 229 | index = xfs_set_inode_alloc(mp, agcount); |
Christoph Hellwig | fb3b504 | 2010-05-28 19:03:10 +0000 | [diff] [blame] | 230 | |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 231 | if (maxagi) |
| 232 | *maxagi = index; |
| 233 | return 0; |
Dave Chinner | 8b26c58 | 2010-01-11 11:47:48 +0000 | [diff] [blame] | 234 | |
| 235 | out_unwind: |
| 236 | kmem_free(pag); |
| 237 | for (; index > first_initialised; index--) { |
| 238 | pag = radix_tree_delete(&mp->m_perag_tree, index); |
| 239 | kmem_free(pag); |
| 240 | } |
| 241 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | /* |
| 245 | * xfs_readsb |
| 246 | * |
| 247 | * Does the initial read of the superblock. |
| 248 | */ |
| 249 | int |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 250 | xfs_readsb( |
| 251 | struct xfs_mount *mp, |
| 252 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
| 254 | unsigned int sector_size; |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 255 | struct xfs_buf *bp; |
| 256 | struct xfs_sb *sbp = &mp->m_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | int error; |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 258 | int loud = !(flags & XFS_MFSI_QUIET); |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 259 | const struct xfs_buf_ops *buf_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | ASSERT(mp->m_sb_bp == NULL); |
| 262 | ASSERT(mp->m_ddev_targp != NULL); |
| 263 | |
| 264 | /* |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 265 | * For the initial read, we must guess at the sector |
| 266 | * size based on the block device. It's enough to |
| 267 | * get the sb_sectsize out of the superblock and |
| 268 | * then reread with the proper length. |
| 269 | * We don't verify it yet, because it may not be complete. |
| 270 | */ |
| 271 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); |
| 272 | buf_ops = NULL; |
| 273 | |
| 274 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | * Allocate a (locked) buffer to hold the superblock. |
| 276 | * This will be kept around at all times to optimize |
| 277 | * access to the superblock. |
| 278 | */ |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 279 | reread: |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 280 | error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
| 281 | BTOBB(sector_size), 0, &bp, buf_ops); |
| 282 | if (error) { |
Dave Chinner | eab4e63 | 2012-11-12 22:54:02 +1100 | [diff] [blame] | 283 | if (loud) |
Dave Chinner | e721f50 | 2013-04-03 16:11:32 +1100 | [diff] [blame] | 284 | xfs_warn(mp, "SB validate failed with error %d.", error); |
Dave Chinner | ac75a1f | 2014-03-07 16:19:14 +1100 | [diff] [blame] | 285 | /* bad CRC means corrupted metadata */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 286 | if (error == -EFSBADCRC) |
| 287 | error = -EFSCORRUPTED; |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 288 | return error; |
Dave Chinner | eab4e63 | 2012-11-12 22:54:02 +1100 | [diff] [blame] | 289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* |
| 292 | * Initialize the mount structure from the superblock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | */ |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 294 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 295 | |
| 296 | /* |
| 297 | * If we haven't validated the superblock, do so now before we try |
| 298 | * to check the sector size and reread the superblock appropriately. |
| 299 | */ |
| 300 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
| 301 | if (loud) |
| 302 | xfs_warn(mp, "Invalid superblock magic number"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 303 | error = -EINVAL; |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 304 | goto release_buf; |
| 305 | } |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | /* |
| 308 | * We must be able to do sector-sized and sector-aligned IO. |
| 309 | */ |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 310 | if (sector_size > sbp->sb_sectsize) { |
Dave Chinner | af34e09 | 2011-03-07 10:04:35 +1100 | [diff] [blame] | 311 | if (loud) |
| 312 | xfs_warn(mp, "device supports %u byte sectors (not %u)", |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 313 | sector_size, sbp->sb_sectsize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 314 | error = -ENOSYS; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 315 | goto release_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 318 | if (buf_ops == NULL) { |
Dave Chinner | 556b888 | 2014-06-06 16:00:43 +1000 | [diff] [blame] | 319 | /* |
| 320 | * Re-read the superblock so the buffer is correctly sized, |
| 321 | * and properly verified. |
| 322 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | xfs_buf_relse(bp); |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 324 | sector_size = sbp->sb_sectsize; |
Eric Sandeen | daba542 | 2014-02-19 15:39:16 +1100 | [diff] [blame] | 325 | buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 326 | goto reread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Dave Chinner | 5681ca4 | 2015-02-23 21:22:31 +1100 | [diff] [blame] | 329 | xfs_reinit_percpu_counters(mp); |
David Chinner | 8d280b9 | 2006-03-14 13:13:09 +1100 | [diff] [blame] | 330 | |
Dave Chinner | 04a1e6c | 2013-04-03 16:11:31 +1100 | [diff] [blame] | 331 | /* no need to be quiet anymore, so reset the buf ops */ |
| 332 | bp->b_ops = &xfs_sb_buf_ops; |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | mp->m_sb_bp = bp; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 335 | xfs_buf_unlock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | return 0; |
| 337 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 338 | release_buf: |
| 339 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | return error; |
| 341 | } |
| 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 344 | * Update alignment values based on mount options and sb values |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 346 | STATIC int |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 347 | xfs_update_alignment(xfs_mount_t *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | xfs_sb_t *sbp = &(mp->m_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 351 | if (mp->m_dalign) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /* |
| 353 | * If stripe unit and stripe width are not multiples |
| 354 | * of the fs blocksize turn off alignment. |
| 355 | */ |
| 356 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || |
| 357 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 358 | xfs_warn(mp, |
| 359 | "alignment check failed: sunit/swidth vs. blocksize(%d)", |
| 360 | sbp->sb_blocksize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 361 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | } else { |
| 363 | /* |
| 364 | * Convert the stripe unit and width to FSBs. |
| 365 | */ |
| 366 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); |
| 367 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 368 | xfs_warn(mp, |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 369 | "alignment check failed: sunit/swidth vs. agsize(%d)", |
| 370 | sbp->sb_agblocks); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 371 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } else if (mp->m_dalign) { |
| 373 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); |
| 374 | } else { |
Jie Liu | 39a45d8 | 2013-05-02 19:27:47 +0800 | [diff] [blame] | 375 | xfs_warn(mp, |
| 376 | "alignment check failed: sunit(%d) less than bsize(%d)", |
| 377 | mp->m_dalign, sbp->sb_blocksize); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 378 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * Update superblock with new values |
| 384 | * and log changes |
| 385 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 386 | if (xfs_sb_version_hasdalign(sbp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (sbp->sb_unit != mp->m_dalign) { |
| 388 | sbp->sb_unit = mp->m_dalign; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 389 | mp->m_update_sb = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | if (sbp->sb_width != mp->m_swidth) { |
| 392 | sbp->sb_width = mp->m_swidth; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 393 | mp->m_update_sb = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
Jie Liu | 34d7f60 | 2013-05-02 19:27:53 +0800 | [diff] [blame] | 395 | } else { |
| 396 | xfs_warn(mp, |
| 397 | "cannot change alignment: superblock does not support data alignment"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 398 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 401 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | mp->m_dalign = sbp->sb_unit; |
| 403 | mp->m_swidth = sbp->sb_width; |
| 404 | } |
| 405 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * Set the maximum inode count for this filesystem |
| 411 | */ |
| 412 | STATIC void |
| 413 | xfs_set_maxicount(xfs_mount_t *mp) |
| 414 | { |
| 415 | xfs_sb_t *sbp = &(mp->m_sb); |
| 416 | __uint64_t icount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | if (sbp->sb_imax_pct) { |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 419 | /* |
| 420 | * Make sure the maximum inode count is a multiple |
| 421 | * of the units we allocate inodes in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| 424 | do_div(icount, 100); |
| 425 | do_div(icount, mp->m_ialloc_blks); |
| 426 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << |
| 427 | sbp->sb_inopblog; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 428 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | mp->m_maxicount = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 433 | /* |
| 434 | * Set the default minimum read and write sizes unless |
| 435 | * already specified in a mount option. |
| 436 | * We use smaller I/O sizes when the file system |
| 437 | * is being used for NFS service (wsync mount option). |
| 438 | */ |
| 439 | STATIC void |
| 440 | xfs_set_rw_sizes(xfs_mount_t *mp) |
| 441 | { |
| 442 | xfs_sb_t *sbp = &(mp->m_sb); |
| 443 | int readio_log, writeio_log; |
| 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
| 446 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 447 | readio_log = XFS_WSYNC_READIO_LOG; |
| 448 | writeio_log = XFS_WSYNC_WRITEIO_LOG; |
| 449 | } else { |
| 450 | readio_log = XFS_READIO_LOG_LARGE; |
| 451 | writeio_log = XFS_WRITEIO_LOG_LARGE; |
| 452 | } |
| 453 | } else { |
| 454 | readio_log = mp->m_readio_log; |
| 455 | writeio_log = mp->m_writeio_log; |
| 456 | } |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (sbp->sb_blocklog > readio_log) { |
| 459 | mp->m_readio_log = sbp->sb_blocklog; |
| 460 | } else { |
| 461 | mp->m_readio_log = readio_log; |
| 462 | } |
| 463 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); |
| 464 | if (sbp->sb_blocklog > writeio_log) { |
| 465 | mp->m_writeio_log = sbp->sb_blocklog; |
| 466 | } else { |
| 467 | mp->m_writeio_log = writeio_log; |
| 468 | } |
| 469 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 470 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 472 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 473 | * precalculate the low space thresholds for dynamic speculative preallocation. |
| 474 | */ |
| 475 | void |
| 476 | xfs_set_low_space_thresholds( |
| 477 | struct xfs_mount *mp) |
| 478 | { |
| 479 | int i; |
| 480 | |
| 481 | for (i = 0; i < XFS_LOWSP_MAX; i++) { |
| 482 | __uint64_t space = mp->m_sb.sb_dblocks; |
| 483 | |
| 484 | do_div(space, 100); |
| 485 | mp->m_low_space[i] = space * (i + 1); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | |
| 490 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 491 | * Set whether we're using inode alignment. |
| 492 | */ |
| 493 | STATIC void |
| 494 | xfs_set_inoalignment(xfs_mount_t *mp) |
| 495 | { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 496 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | mp->m_sb.sb_inoalignmt >= |
| 498 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) |
| 499 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; |
| 500 | else |
| 501 | mp->m_inoalign_mask = 0; |
| 502 | /* |
| 503 | * If we are using stripe alignment, check whether |
| 504 | * the stripe unit is a multiple of the inode alignment |
| 505 | */ |
| 506 | if (mp->m_dalign && mp->m_inoalign_mask && |
| 507 | !(mp->m_dalign & mp->m_inoalign_mask)) |
| 508 | mp->m_sinoalign = mp->m_dalign; |
| 509 | else |
| 510 | mp->m_sinoalign = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | /* |
Zhi Yong Wu | 0471f62 | 2013-08-07 10:10:58 +0000 | [diff] [blame] | 514 | * Check that the data (and log if separate) is an ok size. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 515 | */ |
| 516 | STATIC int |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 517 | xfs_check_sizes( |
| 518 | struct xfs_mount *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 519 | { |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 520 | struct xfs_buf *bp; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 521 | xfs_daddr_t d; |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 522 | int error; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
| 525 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 526 | xfs_warn(mp, "filesystem size mismatch detected"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 527 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | } |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 529 | error = xfs_buf_read_uncached(mp->m_ddev_targp, |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 530 | d - XFS_FSS_TO_BB(mp, 1), |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 531 | XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); |
| 532 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 533 | xfs_warn(mp, "last sector read failed"); |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 534 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
Dave Chinner | 1922c94 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 536 | xfs_buf_relse(bp); |
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 | if (mp->m_logdev_targp == mp->m_ddev_targp) |
| 539 | return 0; |
| 540 | |
| 541 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); |
| 542 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { |
| 543 | xfs_warn(mp, "log size mismatch detected"); |
| 544 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
Dave Chinner | ba37267 | 2014-10-02 09:05:32 +1000 | [diff] [blame] | 546 | error = xfs_buf_read_uncached(mp->m_logdev_targp, |
| 547 | d - XFS_FSB_TO_BB(mp, 1), |
| 548 | XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); |
| 549 | if (error) { |
| 550 | xfs_warn(mp, "log device read failed"); |
| 551 | return error; |
| 552 | } |
| 553 | xfs_buf_relse(bp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | /* |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 558 | * Clear the quotaflags in memory and in the superblock. |
| 559 | */ |
| 560 | int |
| 561 | xfs_mount_reset_sbqflags( |
| 562 | struct xfs_mount *mp) |
| 563 | { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 564 | mp->m_qflags = 0; |
| 565 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 566 | /* 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] | 567 | if (mp->m_sb.sb_qflags == 0) |
| 568 | return 0; |
| 569 | spin_lock(&mp->m_sb_lock); |
| 570 | mp->m_sb.sb_qflags = 0; |
| 571 | spin_unlock(&mp->m_sb_lock); |
| 572 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 573 | if (!xfs_fs_writable(mp, SB_FREEZE_WRITE)) |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 574 | return 0; |
| 575 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 576 | return xfs_sync_sb(mp, false); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 577 | } |
| 578 | |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 579 | __uint64_t |
| 580 | xfs_default_resblks(xfs_mount_t *mp) |
| 581 | { |
| 582 | __uint64_t resblks; |
| 583 | |
| 584 | /* |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 585 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
| 586 | * smaller. This is intended to cover concurrent allocation |
| 587 | * transactions when we initially hit enospc. These each require a 4 |
| 588 | * block reservation. Hence by default we cover roughly 2000 concurrent |
| 589 | * allocation reservations. |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 590 | */ |
| 591 | resblks = mp->m_sb.sb_dblocks; |
| 592 | do_div(resblks, 20); |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 593 | resblks = min_t(__uint64_t, resblks, 8192); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 594 | return resblks; |
| 595 | } |
| 596 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 597 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 598 | * This function does the following on an initial mount of a file system: |
| 599 | * - reads the superblock from disk and init the mount struct |
| 600 | * - if we're a 32-bit kernel, do a size check on the superblock |
| 601 | * so we don't mount terabyte filesystems |
| 602 | * - init mount struct realtime fields |
| 603 | * - allocate inode hash table for fs |
| 604 | * - init directory manager |
| 605 | * - perform recovery and init the log manager |
| 606 | */ |
| 607 | int |
| 608 | xfs_mountfs( |
Brian Foster | f0b2efa | 2015-08-19 09:58:36 +1000 | [diff] [blame] | 609 | struct xfs_mount *mp) |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 610 | { |
Brian Foster | f0b2efa | 2015-08-19 09:58:36 +1000 | [diff] [blame] | 611 | struct xfs_sb *sbp = &(mp->m_sb); |
| 612 | struct xfs_inode *rip; |
| 613 | __uint64_t resblks; |
| 614 | uint quotamount = 0; |
| 615 | uint quotaflags = 0; |
| 616 | int error = 0; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 617 | |
Dave Chinner | ff55068 | 2013-08-12 20:49:41 +1000 | [diff] [blame] | 618 | xfs_sb_mount_common(mp, sbp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 619 | |
| 620 | /* |
Dave Chinner | 074e427 | 2015-01-22 09:10:33 +1100 | [diff] [blame] | 621 | * Check for a mismatched features2 values. Older kernels read & wrote |
| 622 | * into the wrong sb offset for sb_features2 on some platforms due to |
| 623 | * xfs_sb_t not being 64bit size aligned when sb_features2 was added, |
| 624 | * which made older superblock reading/writing routines swap it as a |
| 625 | * 64-bit value. |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 626 | * |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 627 | * For backwards compatibility, we make both slots equal. |
| 628 | * |
Dave Chinner | 074e427 | 2015-01-22 09:10:33 +1100 | [diff] [blame] | 629 | * If we detect a mismatched field, we OR the set bits into the existing |
| 630 | * features2 field in case it has already been modified; we don't want |
| 631 | * to lose any features. We then update the bad location with the ORed |
| 632 | * value so that older kernels will see any features2 flags. The |
| 633 | * superblock writeback code ensures the new sb_features2 is copied to |
| 634 | * sb_bad_features2 before it is logged or written to disk. |
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 | if (xfs_sb_has_mismatched_features2(sbp)) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 637 | xfs_warn(mp, "correcting sb_features alignment problem"); |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 638 | sbp->sb_features2 |= sbp->sb_bad_features2; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 639 | mp->m_update_sb = true; |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 640 | |
| 641 | /* |
| 642 | * Re-check for ATTR2 in case it was found in bad_features2 |
| 643 | * slot. |
| 644 | */ |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 645 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 646 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 647 | mp->m_flags |= XFS_MOUNT_ATTR2; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 648 | } |
Eric Sandeen | e6957ea | 2008-04-10 12:19:34 +1000 | [diff] [blame] | 649 | |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 650 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| 651 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { |
| 652 | xfs_sb_version_removeattr2(&mp->m_sb); |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 653 | mp->m_update_sb = true; |
Tim Shimmin | 7c12f29 | 2008-04-30 18:15:28 +1000 | [diff] [blame] | 654 | |
| 655 | /* update sb_versionnum for the clearing of the morebits */ |
| 656 | if (!sbp->sb_features2) |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 657 | mp->m_update_sb = true; |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 658 | } |
| 659 | |
Dave Chinner | 263997a | 2014-05-20 07:46:40 +1000 | [diff] [blame] | 660 | /* always use v2 inodes by default now */ |
| 661 | if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) { |
| 662 | mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT; |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 663 | mp->m_update_sb = true; |
Dave Chinner | 263997a | 2014-05-20 07:46:40 +1000 | [diff] [blame] | 664 | } |
| 665 | |
David Chinner | ee1c090 | 2008-03-06 13:45:50 +1100 | [diff] [blame] | 666 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 667 | * Check if sb_agblocks is aligned at stripe boundary |
| 668 | * If sb_agblocks is NOT aligned turn off m_dalign since |
| 669 | * allocator alignment is within an ag, therefore ag has |
| 670 | * to be aligned at stripe boundary. |
| 671 | */ |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 672 | error = xfs_update_alignment(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 673 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 674 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 675 | |
| 676 | xfs_alloc_compute_maxlevels(mp); |
| 677 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); |
| 678 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); |
| 679 | xfs_ialloc_compute_maxlevels(mp); |
| 680 | |
| 681 | xfs_set_maxicount(mp); |
| 682 | |
Carlos Maiolino | e6b3bb7 | 2016-05-18 11:11:27 +1000 | [diff] [blame] | 683 | /* enable fail_at_unmount as default */ |
| 684 | mp->m_fail_unmount = 1; |
| 685 | |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 686 | 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] | 687 | if (error) |
| 688 | goto out; |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 689 | |
Bill O'Donnell | 225e463 | 2015-10-12 18:21:19 +1100 | [diff] [blame] | 690 | error = xfs_sysfs_init(&mp->m_stats.xs_kobj, &xfs_stats_ktype, |
| 691 | &mp->m_kobj, "stats"); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 692 | if (error) |
| 693 | goto out_remove_sysfs; |
| 694 | |
Carlos Maiolino | 192852b | 2016-05-18 10:58:51 +1000 | [diff] [blame] | 695 | error = xfs_error_sysfs_init(mp); |
Bill O'Donnell | 225e463 | 2015-10-12 18:21:19 +1100 | [diff] [blame] | 696 | if (error) |
| 697 | goto out_del_stats; |
| 698 | |
Carlos Maiolino | 192852b | 2016-05-18 10:58:51 +1000 | [diff] [blame] | 699 | |
| 700 | error = xfs_uuid_mount(mp); |
| 701 | if (error) |
| 702 | goto out_remove_error_sysfs; |
| 703 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 704 | /* |
| 705 | * Set the minimum read and write sizes |
| 706 | */ |
| 707 | xfs_set_rw_sizes(mp); |
| 708 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 709 | /* set the low space thresholds for dynamic preallocation */ |
| 710 | xfs_set_low_space_thresholds(mp); |
| 711 | |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 712 | /* |
| 713 | * Set the inode cluster size. |
| 714 | * This may still be overridden by the file system |
| 715 | * block size if it is larger than the chosen cluster size. |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 716 | * |
| 717 | * For v5 filesystems, scale the cluster size with the inode size to |
| 718 | * keep a constant ratio of inode per cluster buffer, but only if mkfs |
| 719 | * has set the inode alignment value appropriately for larger cluster |
| 720 | * sizes. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 721 | */ |
| 722 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 723 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 724 | int new_size = mp->m_inode_cluster_size; |
| 725 | |
| 726 | new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE; |
| 727 | if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size)) |
| 728 | mp->m_inode_cluster_size = new_size; |
Dave Chinner | 8f80587 | 2013-11-01 15:27:20 +1100 | [diff] [blame] | 729 | } |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 730 | |
| 731 | /* |
Brian Foster | e5376fc | 2015-05-29 08:57:27 +1000 | [diff] [blame] | 732 | * If enabled, sparse inode chunk alignment is expected to match the |
| 733 | * cluster size. Full inode chunk alignment must match the chunk size, |
| 734 | * but that is checked on sb read verification... |
| 735 | */ |
| 736 | if (xfs_sb_version_hassparseinodes(&mp->m_sb) && |
| 737 | mp->m_sb.sb_spino_align != |
| 738 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) { |
| 739 | xfs_warn(mp, |
| 740 | "Sparse inode block alignment (%u) must match cluster size (%llu).", |
| 741 | mp->m_sb.sb_spino_align, |
| 742 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)); |
| 743 | error = -EINVAL; |
| 744 | goto out_remove_uuid; |
| 745 | } |
| 746 | |
| 747 | /* |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 748 | * Set inode alignment fields |
| 749 | */ |
| 750 | xfs_set_inoalignment(mp); |
| 751 | |
| 752 | /* |
Zhi Yong Wu | c2bfbc9 | 2013-08-12 03:15:03 +0000 | [diff] [blame] | 753 | * Check that the data (and log if separate) is an ok size. |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 754 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 755 | error = xfs_check_sizes(mp); |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 756 | if (error) |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 757 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
| 759 | /* |
| 760 | * Initialize realtime fields in the mount structure |
| 761 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 762 | error = xfs_rtmount_init(mp); |
| 763 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 764 | xfs_warn(mp, "RT mount failed"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 765 | goto out_remove_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | * Copies the low order bits of the timestamp and the randomly |
| 770 | * set "sequence" number out of a UUID. |
| 771 | */ |
| 772 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); |
| 773 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
| 775 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 776 | error = xfs_da_mount(mp); |
| 777 | if (error) { |
| 778 | xfs_warn(mp, "Failed dir/attr init: %d", error); |
| 779 | goto out_remove_uuid; |
| 780 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | |
| 782 | /* |
| 783 | * Initialize the precomputed transaction reservations values. |
| 784 | */ |
| 785 | xfs_trans_init(mp); |
| 786 | |
| 787 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | * Allocate and initialize the per-ag data. |
| 789 | */ |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 790 | spin_lock_init(&mp->m_perag_lock); |
Dave Chinner | 9b98b6f | 2010-05-27 01:58:13 +0000 | [diff] [blame] | 791 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 792 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
| 793 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 794 | xfs_warn(mp, "Failed per-ag init: %d", error); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 795 | goto out_free_dir; |
Dave Chinner | 1c1c6eb | 2010-01-11 11:47:44 +0000 | [diff] [blame] | 796 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 798 | if (!sbp->sb_logblocks) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 799 | xfs_warn(mp, "no log defined"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 800 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 801 | error = -EFSCORRUPTED; |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 802 | goto out_free_perag; |
| 803 | } |
| 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | /* |
Brian Foster | f0b2efa | 2015-08-19 09:58:36 +1000 | [diff] [blame] | 806 | * Log's mount-time initialization. The first part of recovery can place |
| 807 | * some items on the AIL, to be handled when recovery is finished or |
| 808 | * cancelled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | */ |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 810 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
| 811 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), |
| 812 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); |
| 813 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 814 | xfs_warn(mp, "log mount failed"); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 815 | goto out_fail_wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
| 817 | |
| 818 | /* |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 819 | * Now the log is mounted, we know if it was an unclean shutdown or |
| 820 | * not. If it was, with the first phase of recovery has completed, we |
| 821 | * have consistent AG blocks on disk. We have not recovered EFIs yet, |
| 822 | * but they are recovered transactionally in the second recovery phase |
| 823 | * later. |
| 824 | * |
| 825 | * Hence we can safely re-initialise incore superblock counters from |
| 826 | * the per-ag data. These may not be correct if the filesystem was not |
| 827 | * cleanly unmounted, so we need to wait for recovery to finish before |
| 828 | * doing this. |
| 829 | * |
| 830 | * If the filesystem was cleanly unmounted, then we can trust the |
| 831 | * values in the superblock to be correct and we don't need to do |
| 832 | * anything here. |
| 833 | * |
| 834 | * If we are currently making the filesystem, the initialisation will |
| 835 | * fail as the perag data is in an undefined state. |
| 836 | */ |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 837 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
| 838 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && |
| 839 | !mp->m_sb.sb_inprogress) { |
| 840 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 841 | if (error) |
kbuild test robot | 6eee897 | 2014-08-04 13:49:40 +1000 | [diff] [blame] | 842 | goto out_log_dealloc; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 843 | } |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 844 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 845 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | * Get and sanity-check the root inode. |
| 847 | * Save the pointer to it in the mount structure. |
| 848 | */ |
Dave Chinner | 7b6259e | 2010-06-24 11:35:17 +1000 | [diff] [blame] | 849 | 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] | 850 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 851 | xfs_warn(mp, "failed to read root inode"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 852 | goto out_log_dealloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | ASSERT(rip != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 857 | if (unlikely(!S_ISDIR(VFS_I(rip)->i_mode))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 858 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
Nathan Scott | b657452 | 2006-06-09 15:29:40 +1000 | [diff] [blame] | 859 | (unsigned long long)rip->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 861 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, |
| 862 | mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 863 | error = -EFSCORRUPTED; |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 864 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | } |
| 866 | mp->m_rootip = rip; /* save it */ |
| 867 | |
| 868 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
| 869 | |
| 870 | /* |
| 871 | * Initialize realtime inode pointers in the mount structure |
| 872 | */ |
Eric Sandeen | 0771fb4 | 2007-10-12 11:03:40 +1000 | [diff] [blame] | 873 | error = xfs_rtmount_inodes(mp); |
| 874 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | /* |
| 876 | * Free up the root inode. |
| 877 | */ |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 878 | xfs_warn(mp, "failed to read RT inodes"); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 879 | goto out_rele_rip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | /* |
Christoph Hellwig | 7884bc8 | 2009-01-19 02:04:07 +0100 | [diff] [blame] | 883 | * If this is a read-only mount defer the superblock updates until |
| 884 | * the next remount into writeable mode. Otherwise we would never |
| 885 | * perform the update e.g. for the root filesystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | */ |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 887 | if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 888 | error = xfs_sync_sb(mp, false); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 889 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 890 | xfs_warn(mp, "failed to write sb changes"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 891 | goto out_rtunmount; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 892 | } |
| 893 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | /* |
| 896 | * Initialise the XFS quota management subsystem for this mount |
| 897 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 898 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
| 899 | error = xfs_qm_newmount(mp, "amount, "aflags); |
| 900 | if (error) |
| 901 | goto out_rtunmount; |
| 902 | } else { |
| 903 | ASSERT(!XFS_IS_QUOTA_ON(mp)); |
| 904 | |
| 905 | /* |
| 906 | * If a file system had quotas running earlier, but decided to |
| 907 | * mount without -o uquota/pquota/gquota options, revoke the |
| 908 | * quotachecked license. |
| 909 | */ |
| 910 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 911 | xfs_notice(mp, "resetting quota flags"); |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 912 | error = xfs_mount_reset_sbqflags(mp); |
| 913 | if (error) |
Brian Foster | a70a4fa | 2014-07-15 07:41:25 +1000 | [diff] [blame] | 914 | goto out_rtunmount; |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 915 | } |
| 916 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
| 918 | /* |
Brian Foster | f0b2efa | 2015-08-19 09:58:36 +1000 | [diff] [blame] | 919 | * Finish recovering the file system. This part needed to be delayed |
| 920 | * until after the root and real-time bitmap inodes were consistently |
| 921 | * read in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | */ |
Christoph Hellwig | 4249023 | 2008-08-13 16:49:32 +1000 | [diff] [blame] | 923 | error = xfs_log_mount_finish(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 925 | xfs_warn(mp, "log mount finish failed"); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 926 | goto out_rtunmount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | } |
| 928 | |
| 929 | /* |
| 930 | * Complete the quota initialisation, post-log-replay component. |
| 931 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 932 | if (quotamount) { |
| 933 | ASSERT(mp->m_qflags == 0); |
| 934 | mp->m_qflags = quotaflags; |
| 935 | |
| 936 | xfs_qm_mount_quotas(mp); |
| 937 | } |
| 938 | |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 939 | /* |
| 940 | * Now we are mounted, reserve a small amount of unused space for |
| 941 | * privileged transactions. This is needed so that transaction |
| 942 | * space required for critical operations can dip into this pool |
| 943 | * when at ENOSPC. This is needed for operations like create with |
| 944 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations |
| 945 | * are not allowed to use this reserved space. |
Dave Chinner | 8babd8a | 2010-03-04 01:46:25 +0000 | [diff] [blame] | 946 | * |
| 947 | * This may drive us straight to ENOSPC on mount, but that implies |
| 948 | * we were already there on the last unmount. Warn if this occurs. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 949 | */ |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 950 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| 951 | resblks = xfs_default_resblks(mp); |
| 952 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 953 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 954 | xfs_warn(mp, |
| 955 | "Unable to allocate reserve blocks. Continuing without reserve pool."); |
Eric Sandeen | d5db0f9 | 2010-02-05 22:59:53 +0000 | [diff] [blame] | 956 | } |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 957 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | return 0; |
| 959 | |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 960 | out_rtunmount: |
| 961 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 962 | out_rele_rip: |
Christoph Hellwig | 4335509 | 2008-03-27 18:01:08 +1100 | [diff] [blame] | 963 | IRELE(rip); |
Brian Foster | 0ae120f | 2015-08-19 10:00:28 +1000 | [diff] [blame] | 964 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
| 965 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 966 | out_log_dealloc: |
Carlos Maiolino | e6b3bb7 | 2016-05-18 11:11:27 +1000 | [diff] [blame] | 967 | mp->m_flags |= XFS_MOUNT_UNMOUNTING; |
Brian Foster | f0b2efa | 2015-08-19 09:58:36 +1000 | [diff] [blame] | 968 | xfs_log_mount_cancel(mp); |
Dave Chinner | d4f3512 | 2012-04-23 15:59:06 +1000 | [diff] [blame] | 969 | out_fail_wait: |
| 970 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) |
| 971 | xfs_wait_buftarg(mp->m_logdev_targp); |
| 972 | xfs_wait_buftarg(mp->m_ddev_targp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 973 | out_free_perag: |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 974 | xfs_free_perag(mp); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 975 | out_free_dir: |
| 976 | xfs_da_unmount(mp); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 977 | out_remove_uuid: |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 978 | xfs_uuid_unmount(mp); |
Carlos Maiolino | 192852b | 2016-05-18 10:58:51 +1000 | [diff] [blame] | 979 | out_remove_error_sysfs: |
| 980 | xfs_error_sysfs_del(mp); |
Bill O'Donnell | 225e463 | 2015-10-12 18:21:19 +1100 | [diff] [blame] | 981 | out_del_stats: |
| 982 | xfs_sysfs_del(&mp->m_stats.xs_kobj); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 983 | out_remove_sysfs: |
| 984 | xfs_sysfs_del(&mp->m_kobj); |
Christoph Hellwig | f9057e3 | 2009-02-04 09:31:52 +0100 | [diff] [blame] | 985 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | return error; |
| 987 | } |
| 988 | |
| 989 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | * This flushes out the inodes,dquots and the superblock, unmounts the |
| 991 | * log and makes sure that incore structures are freed. |
| 992 | */ |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 993 | void |
| 994 | xfs_unmountfs( |
| 995 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | { |
Christoph Hellwig | 41b5c2e | 2008-08-13 16:49:57 +1000 | [diff] [blame] | 997 | __uint64_t resblks; |
| 998 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
Brian Foster | 579b62f | 2012-11-06 09:50:47 -0500 | [diff] [blame] | 1000 | cancel_delayed_work_sync(&mp->m_eofblocks_work); |
| 1001 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1002 | xfs_qm_unmount_quotas(mp); |
Christoph Hellwig | b93b6e4 | 2009-02-04 09:33:58 +0100 | [diff] [blame] | 1003 | xfs_rtunmount_inodes(mp); |
Christoph Hellwig | 77508ec | 2008-08-13 16:49:04 +1000 | [diff] [blame] | 1004 | IRELE(mp->m_rootip); |
| 1005 | |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1006 | /* |
| 1007 | * We can potentially deadlock here if we have an inode cluster |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1008 | * that has been freed has its buffer still pinned in memory because |
David Chinner | 641c56f | 2007-06-18 16:50:17 +1000 | [diff] [blame] | 1009 | * the transaction is still sitting in a iclog. The stale inodes |
| 1010 | * on that buffer will have their flush locks held until the |
| 1011 | * transaction hits the disk and the callbacks run. the inode |
| 1012 | * flush takes the flush lock unconditionally and with nothing to |
| 1013 | * push out the iclog we will never get that unlocked. hence we |
| 1014 | * need to force the log first. |
| 1015 | */ |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1016 | xfs_log_force(mp, XFS_LOG_SYNC); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1017 | |
| 1018 | /* |
Carlos Maiolino | e6b3bb7 | 2016-05-18 11:11:27 +1000 | [diff] [blame] | 1019 | * We now need to tell the world we are unmounting. This will allow |
| 1020 | * us to detect that the filesystem is going away and we should error |
| 1021 | * out anything that we have been retrying in the background. This will |
| 1022 | * prevent neverending retries in AIL pushing from hanging the unmount. |
| 1023 | */ |
| 1024 | mp->m_flags |= XFS_MOUNT_UNMOUNTING; |
| 1025 | |
| 1026 | /* |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1027 | * Flush all pending changes from the AIL. |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1028 | */ |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1029 | xfs_ail_push_all_sync(mp->m_ail); |
| 1030 | |
| 1031 | /* |
| 1032 | * And reclaim all inodes. At this point there should be no dirty |
Dave Chinner | 7e18530 | 2012-10-08 21:56:00 +1100 | [diff] [blame] | 1033 | * inodes and none should be pinned or locked, but use synchronous |
| 1034 | * reclaim just to be sure. We can stop background inode reclaim |
| 1035 | * here as well if it is still running. |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 1036 | */ |
Dave Chinner | 7e18530 | 2012-10-08 21:56:00 +1100 | [diff] [blame] | 1037 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 1038 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 1040 | xfs_qm_unmount(mp); |
Lachlan McIlroy | a357a12 | 2008-10-30 16:53:25 +1100 | [diff] [blame] | 1041 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | /* |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1043 | * Unreserve any blocks we have so that when we unmount we don't account |
| 1044 | * the reserved free space as used. This is really only necessary for |
| 1045 | * lazy superblock counting because it trusts the incore superblock |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 1046 | * counters to be absolutely correct on clean unmount. |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 1047 | * |
| 1048 | * We don't bother correcting this elsewhere for lazy superblock |
| 1049 | * counting because on mount of an unclean filesystem we reconstruct the |
| 1050 | * correct counter value and this is irrelevant. |
| 1051 | * |
| 1052 | * For non-lazy counter filesystems, this doesn't matter at all because |
| 1053 | * we only every apply deltas to the superblock and hence the incore |
| 1054 | * value does not matter.... |
| 1055 | */ |
| 1056 | resblks = 0; |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1057 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
| 1058 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1059 | xfs_warn(mp, "Unable to free reserved block pool. " |
David Chinner | 714082b | 2008-04-10 12:20:03 +1000 | [diff] [blame] | 1060 | "Freespace may not be correct on next mount."); |
| 1061 | |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1062 | error = xfs_log_sbcount(mp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1063 | if (error) |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1064 | xfs_warn(mp, "Unable to update superblock counters. " |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1065 | "Freespace may not be correct on next mount."); |
Christoph Hellwig | 87c7bec | 2011-09-14 14:08:26 +0000 | [diff] [blame] | 1066 | |
Bill O'Donnell | 225e463 | 2015-10-12 18:21:19 +1100 | [diff] [blame] | 1067 | |
Christoph Hellwig | 21b699c | 2009-03-16 08:19:29 +0100 | [diff] [blame] | 1068 | xfs_log_unmount(mp); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 1069 | xfs_da_unmount(mp); |
Christoph Hellwig | 2717420 | 2009-03-30 10:21:31 +0200 | [diff] [blame] | 1070 | xfs_uuid_unmount(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
Christoph Hellwig | 1550d0b | 2008-08-13 16:17:37 +1000 | [diff] [blame] | 1072 | #if defined(DEBUG) |
Christoph Hellwig | 0ce4cfd | 2007-08-30 17:20:53 +1000 | [diff] [blame] | 1073 | xfs_errortag_clearall(mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | #endif |
Christoph Hellwig | ff4f038 | 2008-08-13 16:50:47 +1000 | [diff] [blame] | 1075 | xfs_free_perag(mp); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 1076 | |
Carlos Maiolino | 192852b | 2016-05-18 10:58:51 +1000 | [diff] [blame] | 1077 | xfs_error_sysfs_del(mp); |
Bill O'Donnell | 225e463 | 2015-10-12 18:21:19 +1100 | [diff] [blame] | 1078 | xfs_sysfs_del(&mp->m_stats.xs_kobj); |
Brian Foster | a31b1d3 | 2014-07-15 08:07:01 +1000 | [diff] [blame] | 1079 | xfs_sysfs_del(&mp->m_kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | } |
| 1081 | |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1082 | /* |
| 1083 | * Determine whether modifications can proceed. The caller specifies the minimum |
| 1084 | * freeze level for which modifications should not be allowed. This allows |
| 1085 | * certain operations to proceed while the freeze sequence is in progress, if |
| 1086 | * necessary. |
| 1087 | */ |
| 1088 | bool |
| 1089 | xfs_fs_writable( |
| 1090 | struct xfs_mount *mp, |
| 1091 | int level) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1092 | { |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1093 | ASSERT(level > SB_UNFROZEN); |
| 1094 | if ((mp->m_super->s_writers.frozen >= level) || |
| 1095 | XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY)) |
| 1096 | return false; |
| 1097 | |
| 1098 | return true; |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1099 | } |
| 1100 | |
| 1101 | /* |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1102 | * xfs_log_sbcount |
| 1103 | * |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1104 | * Sync the superblock counters to disk. |
Alex Elder | b2ce397 | 2011-07-11 09:51:44 -0500 | [diff] [blame] | 1105 | * |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1106 | * Note this code can be called during the process of freezing, so we use the |
| 1107 | * transaction allocator that does not block when the transaction subsystem is |
| 1108 | * in its frozen state. |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1109 | */ |
| 1110 | int |
Chandra Seetharaman | adab0f6 | 2011-06-29 22:10:14 +0000 | [diff] [blame] | 1111 | xfs_log_sbcount(xfs_mount_t *mp) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1112 | { |
Brian Foster | 91ee575 | 2014-11-28 14:02:59 +1100 | [diff] [blame] | 1113 | /* allow this to proceed during the freeze sequence... */ |
| 1114 | if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE)) |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1115 | return 0; |
| 1116 | |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1117 | /* |
| 1118 | * we don't need to do this if we are updating the superblock |
| 1119 | * counters on every modification. |
| 1120 | */ |
| 1121 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) |
| 1122 | return 0; |
| 1123 | |
Dave Chinner | 61e63ec | 2015-01-22 09:10:31 +1100 | [diff] [blame] | 1124 | return xfs_sync_sb(mp, true); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1125 | } |
| 1126 | |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1127 | /* |
| 1128 | * Deltas for the inode count are +/-64, hence we use a large batch size |
| 1129 | * of 128 so we don't need to take the counter lock on every update. |
| 1130 | */ |
| 1131 | #define XFS_ICOUNT_BATCH 128 |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 1132 | int |
| 1133 | xfs_mod_icount( |
| 1134 | struct xfs_mount *mp, |
| 1135 | int64_t delta) |
| 1136 | { |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1137 | __percpu_counter_add(&mp->m_icount, delta, XFS_ICOUNT_BATCH); |
| 1138 | if (__percpu_counter_compare(&mp->m_icount, 0, XFS_ICOUNT_BATCH) < 0) { |
Dave Chinner | 501ab32 | 2015-02-23 21:19:28 +1100 | [diff] [blame] | 1139 | ASSERT(0); |
| 1140 | percpu_counter_add(&mp->m_icount, -delta); |
| 1141 | return -EINVAL; |
| 1142 | } |
| 1143 | return 0; |
| 1144 | } |
| 1145 | |
Dave Chinner | e88b64e | 2015-02-23 21:19:53 +1100 | [diff] [blame] | 1146 | int |
| 1147 | xfs_mod_ifree( |
| 1148 | struct xfs_mount *mp, |
| 1149 | int64_t delta) |
| 1150 | { |
| 1151 | percpu_counter_add(&mp->m_ifree, delta); |
| 1152 | if (percpu_counter_compare(&mp->m_ifree, 0) < 0) { |
| 1153 | ASSERT(0); |
| 1154 | percpu_counter_add(&mp->m_ifree, -delta); |
| 1155 | return -EINVAL; |
| 1156 | } |
| 1157 | return 0; |
| 1158 | } |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1159 | |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1160 | /* |
| 1161 | * Deltas for the block count can vary from 1 to very large, but lock contention |
| 1162 | * only occurs on frequent small block count updates such as in the delayed |
| 1163 | * allocation path for buffered writes (page a time updates). Hence we set |
| 1164 | * a large batch count (1024) to minimise global counter updates except when |
| 1165 | * we get near to ENOSPC and we have to be very accurate with our updates. |
| 1166 | */ |
| 1167 | #define XFS_FDBLOCKS_BATCH 1024 |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1168 | int |
| 1169 | xfs_mod_fdblocks( |
| 1170 | struct xfs_mount *mp, |
| 1171 | int64_t delta, |
| 1172 | bool rsvd) |
| 1173 | { |
| 1174 | int64_t lcounter; |
| 1175 | long long res_used; |
| 1176 | s32 batch; |
| 1177 | |
| 1178 | if (delta > 0) { |
| 1179 | /* |
| 1180 | * If the reserve pool is depleted, put blocks back into it |
| 1181 | * first. Most of the time the pool is full. |
| 1182 | */ |
| 1183 | if (likely(mp->m_resblks == mp->m_resblks_avail)) { |
| 1184 | percpu_counter_add(&mp->m_fdblocks, delta); |
| 1185 | return 0; |
| 1186 | } |
| 1187 | |
| 1188 | spin_lock(&mp->m_sb_lock); |
| 1189 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); |
| 1190 | |
| 1191 | if (res_used > delta) { |
| 1192 | mp->m_resblks_avail += delta; |
| 1193 | } else { |
| 1194 | delta -= res_used; |
| 1195 | mp->m_resblks_avail = mp->m_resblks; |
| 1196 | percpu_counter_add(&mp->m_fdblocks, delta); |
| 1197 | } |
| 1198 | spin_unlock(&mp->m_sb_lock); |
| 1199 | return 0; |
| 1200 | } |
| 1201 | |
| 1202 | /* |
| 1203 | * Taking blocks away, need to be more accurate the closer we |
| 1204 | * are to zero. |
| 1205 | * |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1206 | * If the counter has a value of less than 2 * max batch size, |
| 1207 | * then make everything serialise as we are real close to |
| 1208 | * ENOSPC. |
| 1209 | */ |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1210 | if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH, |
| 1211 | XFS_FDBLOCKS_BATCH) < 0) |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1212 | batch = 1; |
| 1213 | else |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1214 | batch = XFS_FDBLOCKS_BATCH; |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1215 | |
| 1216 | __percpu_counter_add(&mp->m_fdblocks, delta, batch); |
Dave Chinner | 8c1903d | 2015-05-29 07:39:34 +1000 | [diff] [blame] | 1217 | if (__percpu_counter_compare(&mp->m_fdblocks, XFS_ALLOC_SET_ASIDE(mp), |
| 1218 | XFS_FDBLOCKS_BATCH) >= 0) { |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 1219 | /* we had space! */ |
| 1220 | return 0; |
| 1221 | } |
| 1222 | |
| 1223 | /* |
| 1224 | * lock up the sb for dipping into reserves before releasing the space |
| 1225 | * that took us to ENOSPC. |
| 1226 | */ |
| 1227 | spin_lock(&mp->m_sb_lock); |
| 1228 | percpu_counter_add(&mp->m_fdblocks, -delta); |
| 1229 | if (!rsvd) |
| 1230 | goto fdblocks_enospc; |
| 1231 | |
| 1232 | lcounter = (long long)mp->m_resblks_avail + delta; |
| 1233 | if (lcounter >= 0) { |
| 1234 | mp->m_resblks_avail = lcounter; |
| 1235 | spin_unlock(&mp->m_sb_lock); |
| 1236 | return 0; |
| 1237 | } |
| 1238 | printk_once(KERN_WARNING |
| 1239 | "Filesystem \"%s\": reserve blocks depleted! " |
| 1240 | "Consider increasing reserve pool size.", |
| 1241 | mp->m_fsname); |
| 1242 | fdblocks_enospc: |
| 1243 | spin_unlock(&mp->m_sb_lock); |
| 1244 | return -ENOSPC; |
| 1245 | } |
| 1246 | |
Dave Chinner | bab98bb | 2015-02-23 21:22:54 +1100 | [diff] [blame] | 1247 | int |
| 1248 | xfs_mod_frextents( |
| 1249 | struct xfs_mount *mp, |
| 1250 | int64_t delta) |
| 1251 | { |
| 1252 | int64_t lcounter; |
| 1253 | int ret = 0; |
| 1254 | |
| 1255 | spin_lock(&mp->m_sb_lock); |
| 1256 | lcounter = mp->m_sb.sb_frextents + delta; |
| 1257 | if (lcounter < 0) |
| 1258 | ret = -ENOSPC; |
| 1259 | else |
| 1260 | mp->m_sb.sb_frextents = lcounter; |
| 1261 | spin_unlock(&mp->m_sb_lock); |
| 1262 | return ret; |
| 1263 | } |
| 1264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | * xfs_getsb() is called to obtain the buffer for the superblock. |
| 1267 | * The buffer is returned locked and read in from disk. |
| 1268 | * The buffer should be released with a call to xfs_brelse(). |
| 1269 | * |
| 1270 | * If the flags parameter is BUF_TRYLOCK, then we'll only return |
| 1271 | * the superblock buffer if it can be locked without sleeping. |
| 1272 | * If it can't then we'll return NULL. |
| 1273 | */ |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1274 | struct xfs_buf * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | xfs_getsb( |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1276 | struct xfs_mount *mp, |
| 1277 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | { |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1279 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1281 | if (!xfs_buf_trylock(bp)) { |
| 1282 | if (flags & XBF_TRYLOCK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | return NULL; |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1284 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | } |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 1286 | |
Chandra Seetharaman | 72790aa | 2011-07-22 23:40:04 +0000 | [diff] [blame] | 1287 | xfs_buf_hold(bp); |
Dave Chinner | b0388bf | 2016-02-10 15:01:11 +1100 | [diff] [blame] | 1288 | ASSERT(bp->b_flags & XBF_DONE); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1289 | return bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | /* |
| 1293 | * Used to free the superblock along various error paths. |
| 1294 | */ |
| 1295 | void |
| 1296 | xfs_freesb( |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1297 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | { |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1299 | struct xfs_buf *bp = mp->m_sb_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1301 | xfs_buf_lock(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | mp->m_sb_bp = NULL; |
Dave Chinner | 26af655 | 2010-09-22 10:47:20 +1000 | [diff] [blame] | 1303 | xfs_buf_relse(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | /* |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1307 | * If the underlying (data/log/rt) device is readonly, there are some |
| 1308 | * operations that cannot proceed. |
| 1309 | */ |
| 1310 | int |
| 1311 | xfs_dev_is_read_only( |
| 1312 | struct xfs_mount *mp, |
| 1313 | char *message) |
| 1314 | { |
| 1315 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || |
| 1316 | xfs_readonly_buftarg(mp->m_logdev_targp) || |
| 1317 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1318 | xfs_notice(mp, "%s required on read-only device.", message); |
| 1319 | xfs_notice(mp, "write access unavailable, cannot proceed."); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1320 | return -EROFS; |
Christoph Hellwig | dda35b8 | 2010-02-15 09:44:46 +0000 | [diff] [blame] | 1321 | } |
| 1322 | return 0; |
| 1323 | } |