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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * 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 Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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 Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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 Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_MOUNT_H__
19#define __XFS_MOUNT_H__
20
Mark Tinguelyad223e62012-06-14 09:22:15 -050021struct xlog;
Linus Torvalds1da177e2005-04-16 15:20:36 -070022struct xfs_inode;
David Chinner2a82b8b2007-07-11 11:09:12 +100023struct xfs_mru_cache;
Barry Naujok5163f952008-05-21 16:41:01 +100024struct xfs_nameops;
David Chinner82fa9012008-10-30 17:38:26 +110025struct xfs_ail;
Christoph Hellwig7d095252009-06-08 15:33:32 +020026struct xfs_quotainfo;
Dave Chinner32c54832013-10-29 22:11:46 +110027struct xfs_dir_ops;
Dave Chinner0650b552014-06-06 15:01:58 +100028struct xfs_da_geometry;
Christoph Hellwig7d095252009-06-08 15:33:32 +020029
Dave Chinner055388a2011-01-04 11:35:03 +110030/* dynamic preallocation free space thresholds, 5% down to 1% */
31enum {
32 XFS_LOWSP_1_PCNT = 0,
33 XFS_LOWSP_2_PCNT,
34 XFS_LOWSP_3_PCNT,
35 XFS_LOWSP_4_PCNT,
36 XFS_LOWSP_5_PCNT,
37 XFS_LOWSP_MAX,
38};
39
Carlos Maiolino192852b2016-05-18 10:58:51 +100040/*
41 * Error Configuration
42 *
43 * Error classes define the subsystem the configuration belongs to.
44 * Error numbers define the errors that are configurable.
45 */
46enum {
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +100047 XFS_ERR_METADATA,
Carlos Maiolino192852b2016-05-18 10:58:51 +100048 XFS_ERR_CLASS_MAX,
49};
50enum {
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +100051 XFS_ERR_DEFAULT,
Carlos Maiolinoe0a431b32016-05-18 11:09:28 +100052 XFS_ERR_EIO,
53 XFS_ERR_ENOSPC,
54 XFS_ERR_ENODEV,
Carlos Maiolino192852b2016-05-18 10:58:51 +100055 XFS_ERR_ERRNO_MAX,
56};
57
Carlos Maiolinoa5ea70d2016-05-18 11:08:15 +100058#define XFS_ERR_RETRY_FOREVER -1
59
Eric Sandeen77169812016-09-14 07:51:30 +100060/*
61 * Although retry_timeout is in jiffies which is normally an unsigned long,
62 * we limit the retry timeout to 86400 seconds, or one day. So even a
63 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
64 * signed lets us store the special "-1" value, meaning retry forever.
65 */
Carlos Maiolino192852b2016-05-18 10:58:51 +100066struct xfs_error_cfg {
67 struct xfs_kobj kobj;
68 int max_retries;
Eric Sandeen77169812016-09-14 07:51:30 +100069 long retry_timeout; /* in jiffies, -1 = infinite */
Carlos Maiolino192852b2016-05-18 10:58:51 +100070};
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072typedef struct xfs_mount {
Christoph Hellwigb267ce92007-08-30 17:21:30 +100073 struct super_block *m_super;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 xfs_tid_t m_tid; /* next unused tid for fs */
David Chinner82fa9012008-10-30 17:38:26 +110075 struct xfs_ail *m_ail; /* fs active log item list */
Dave Chinner501ab322015-02-23 21:19:28 +110076
77 struct xfs_sb m_sb; /* copy of fs superblock */
Eric Sandeen3685c2a2007-10-11 17:42:32 +100078 spinlock_t m_sb_lock; /* sb counter lock */
Dave Chinner501ab322015-02-23 21:19:28 +110079 struct percpu_counter m_icount; /* allocated inodes counter */
Dave Chinnere88b64e2015-02-23 21:19:53 +110080 struct percpu_counter m_ifree; /* free inodes counter */
Dave Chinner0d485ad2015-02-23 21:22:03 +110081 struct percpu_counter m_fdblocks; /* free block counter */
Dave Chinner501ab322015-02-23 21:19:28 +110082
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct xfs_buf *m_sb_bp; /* buffer for superblock */
84 char *m_fsname; /* filesystem name */
85 int m_fsname_len; /* strlen of fs name */
Nathan Scottfc1f8c12005-11-02 11:44:33 +110086 char *m_rtname; /* realtime device name */
87 char *m_logname; /* external log device name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 int m_bsize; /* fs logical block size */
89 xfs_agnumber_t m_agfrotor; /* last ag where space found */
90 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
Eric Sandeen36e41ee2007-10-11 17:43:43 +100091 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 uint m_readio_log; /* min read size log bytes */
94 uint m_readio_blocks; /* min read size blocks */
95 uint m_writeio_log; /* min write size log bytes */
96 uint m_writeio_blocks; /* min write size blocks */
Dave Chinner0650b552014-06-06 15:01:58 +100097 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
98 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
Mark Tinguelyad223e62012-06-14 09:22:15 -050099 struct xlog *m_log; /* log specific stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 int m_logbufs; /* number of log buffers */
101 int m_logbsize; /* size of each log buffer */
102 uint m_rsumlevels; /* rt summary levels */
103 uint m_rsumsize; /* size of rt summary, bytes */
104 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
105 struct xfs_inode *m_rsumip; /* pointer to summary inode */
106 struct xfs_inode *m_rootip; /* pointer to root directory */
107 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
108 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
109 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
110 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700111 uint8_t m_blkbit_log; /* blocklog + NBBY */
112 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
113 uint8_t m_agno_log; /* log #ag's */
114 uint8_t m_agino_log; /* #bits for agino in inum */
Dave Chinner8f805872013-11-01 15:27:20 +1100115 uint m_inode_cluster_size;/* min inode buf size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 uint m_blockmask; /* sb_blocksize-1 */
117 uint m_blockwsize; /* sb_blocksize in words */
118 uint m_blockwmask; /* blockwsize-1 */
Christoph Hellwig60197e82008-10-30 17:11:19 +1100119 uint m_alloc_mxr[2]; /* max alloc btree records */
120 uint m_alloc_mnr[2]; /* min alloc btree records */
121 uint m_bmap_dmxr[2]; /* max bmap btree records */
122 uint m_bmap_dmnr[2]; /* min bmap btree records */
123 uint m_inobt_mxr[2]; /* max inobt btree records */
124 uint m_inobt_mnr[2]; /* min inobt btree records */
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000125 uint m_rmap_mxr[2]; /* max rmap btree records */
126 uint m_rmap_mnr[2]; /* min rmap btree records */
Darrick J. Wong1946b912016-10-03 09:11:18 -0700127 uint m_refc_mxr[2]; /* max refc btree records */
128 uint m_refc_mnr[2]; /* min refc btree records */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
130 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
Christoph Hellwig0d87e652009-02-09 08:37:14 +0100131 uint m_in_maxlevels; /* max inobt btree levels. */
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000132 uint m_rmap_maxlevels; /* max rmap btree levels */
Darrick J. Wong1946b912016-10-03 09:11:18 -0700133 uint m_refc_maxlevels; /* max refcount btree level */
Darrick J. Wong80180262016-08-03 11:31:47 +1000134 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
Darrick J. Wong52548852016-08-03 11:38:24 +1000135 uint m_alloc_set_aside; /* space we can't use */
136 uint m_ag_max_usable; /* max space per AG */
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000137 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
138 spinlock_t m_perag_lock; /* lock for m_perag_tree */
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000139 struct mutex m_growlock; /* growfs mutex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 int m_fixedfsid[2]; /* unchanged for life of FS */
141 uint m_dmevmask; /* DMI events for this FS */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700142 uint64_t m_flags; /* global mount flags */
Christoph Hellwig76d771b2017-01-25 07:49:35 -0800143 bool m_inotbt_nores; /* no per-AG finobt resv. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 int m_ialloc_inos; /* inodes in inode allocation */
145 int m_ialloc_blks; /* blocks in inode allocation */
Brian Foster066a1882015-05-29 08:55:20 +1000146 int m_ialloc_min_blks;/* min blocks in sparse inode
147 * allocation */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 int m_inoalign_mask;/* mask sb_inoalignmt if used */
149 uint m_qflags; /* quota status flags */
Jie Liu0eadd102013-08-12 20:49:56 +1000150 struct xfs_trans_resv m_resv; /* precomputed res values */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700151 uint64_t m_maxicount; /* maximum inode count */
152 uint64_t m_resblks; /* total reserved blocks */
153 uint64_t m_resblks_avail;/* available reserved blocks */
154 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 int m_dalign; /* stripe unit */
156 int m_swidth; /* stripe width */
Nathan Scottc41564b2006-03-29 08:55:14 +1000157 int m_sinoalign; /* stripe unit inode alignment */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700158 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
Barry Naujok5163f952008-05-21 16:41:01 +1000159 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
Dave Chinner32c54832013-10-29 22:11:46 +1100160 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
Dave Chinner4bceb182013-10-29 22:11:51 +1100161 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 uint m_chsize; /* size of next field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 atomic_t m_active_trans; /* number trans frozen */
David Chinner2a82b8b2007-07-11 11:09:12 +1000164 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
Dave Chinnera7b339f2011-04-08 12:45:07 +1000165 struct delayed_work m_reclaim_work; /* background inode reclaim */
Brian Foster579b62f2012-11-06 09:50:47 -0500166 struct delayed_work m_eofblocks_work; /* background eof blocks
167 trimming */
Darrick J. Wong83104d42016-10-03 09:11:46 -0700168 struct delayed_work m_cowblocks_work; /* background cow blocks
169 trimming */
Dave Chinner61e63ec2015-01-22 09:10:31 +1100170 bool m_update_sb; /* sb needs update in mount */
Dave Chinner055388a2011-01-04 11:35:03 +1100171 int64_t m_low_space[XFS_LOWSP_MAX];
172 /* low free space thresholds */
Brian Fostera31b1d32014-07-15 08:07:01 +1000173 struct xfs_kobj m_kobj;
Carlos Maiolino192852b2016-05-18 10:58:51 +1000174 struct xfs_kobj m_error_kobj;
Carlos Maiolinoffd40ef2016-05-18 11:01:00 +1000175 struct xfs_kobj m_error_meta_kobj;
Carlos Maiolino192852b2016-05-18 10:58:51 +1000176 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
Bill O'Donnell225e4632015-10-12 18:21:19 +1100177 struct xstats m_stats; /* per-fs stats */
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000178
Brian Foster78c931b2014-11-28 13:59:58 +1100179 struct workqueue_struct *m_buf_workqueue;
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000180 struct workqueue_struct *m_data_workqueue;
181 struct workqueue_struct *m_unwritten_workqueue;
Dave Chinner4c2d5422012-04-23 17:54:32 +1000182 struct workqueue_struct *m_cil_workqueue;
Dave Chinner58896082012-10-08 21:56:05 +1100183 struct workqueue_struct *m_reclaim_workqueue;
184 struct workqueue_struct *m_log_workqueue;
Brian Foster579b62f2012-11-06 09:50:47 -0500185 struct workqueue_struct *m_eofblocks_workqueue;
Brian Foster696a5622017-03-28 14:51:44 -0700186 struct workqueue_struct *m_sync_workqueue;
Christoph Hellwig52785112015-02-16 11:49:23 +1100187
188 /*
189 * Generation of the filesysyem layout. This is incremented by each
190 * growfs, and used by the pNFS server to ensure the client updates
191 * its view of the block device once it gets a layout that might
192 * reference the newly added blocks. Does not need to be persistent
193 * as long as we only allow file system size increments, but if we
194 * ever support shrinks it would have to be persisted in addition
195 * to various other kinds of pain inflicted on the pNFS server.
196 */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700197 uint32_t m_generation;
Brian Foster801cc4e2016-03-15 11:42:44 +1100198
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000199 bool m_fail_unmount;
Brian Foster801cc4e2016-03-15 11:42:44 +1100200#ifdef DEBUG
201 /*
202 * DEBUG mode instrumentation to test and/or trigger delayed allocation
203 * block killing in the event of failed writes. When enabled, all
Brian Foster9dbddd72017-02-13 22:48:17 -0800204 * buffered writes are silenty dropped and handled as if they failed.
205 * All delalloc blocks in the range of the write (including pre-existing
206 * delalloc blocks!) are tossed as part of the write failure error
207 * handling sequence.
Brian Foster801cc4e2016-03-15 11:42:44 +1100208 */
Brian Foster9dbddd72017-02-13 22:48:17 -0800209 bool m_drop_writes;
Brian Foster801cc4e2016-03-15 11:42:44 +1100210#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211} xfs_mount_t;
212
213/*
214 * Flags for m_flags.
215 */
David Chinner92821e22007-05-24 15:26:31 +1000216#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 must be synchronous except
218 for space allocations */
Carlos Maiolinoe6b3bb72016-05-18 11:11:27 +1000219#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
David Chinner92821e22007-05-24 15:26:31 +1000220#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
Nathan Scotte718eeb42005-11-02 15:09:22 +1100221#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 operations, typically for
223 disk errors in metadata */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000224#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100225#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 allocations */
Nathan Scott13059ff2006-01-11 15:32:01 +1100227#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000228#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100229#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100230#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
Eric Sandeen12c3f052016-03-02 09:58:09 +1100231#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
232#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100233#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
234#define XFS_MOUNT_BARRIER (1ULL << 17)
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100235#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
Nathan Scotte718eeb42005-11-02 15:09:22 +1100236#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 * allocation */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000238#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100239#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
240#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
David Chinnere8c8b3a2005-11-02 10:33:05 +1100241 * I/O size in stat() */
David Chinner2a82b8b2007-07-11 11:09:12 +1000242#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
243 allocator */
Tim Shimmin7c12f292008-04-30 18:15:28 +1000244#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
David Chinnere8c8b3a2005-11-02 10:33:05 +1100245
Dave Chinnercbe4dab2015-06-04 09:19:18 +1000246#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249/*
250 * Default minimum read and write sizes.
251 */
252#define XFS_READIO_LOG_LARGE 16
253#define XFS_WRITEIO_LOG_LARGE 16
254
255/*
Nathan Scott1f443ad2005-05-05 13:28:29 -0700256 * Max and min values for mount-option defined I/O
257 * preallocation sizes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 */
Nathan Scott1f443ad2005-05-05 13:28:29 -0700259#define XFS_MAX_IO_LOG 30 /* 1G */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260#define XFS_MIN_IO_LOG PAGE_SHIFT
261
262/*
263 * Synchronous read and write sizes. This should be
264 * better for NFSv2 wsync filesystems.
265 */
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200266#define XFS_WSYNC_READIO_LOG 15 /* 32k */
267#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
David Chinnere8c8b3a2005-11-02 10:33:05 +1100269/*
270 * Allow large block sizes to be reported to userspace programs if the
Barry Naujok556b8b12008-04-10 12:22:07 +1000271 * "largeio" mount option is used.
David Chinnere8c8b3a2005-11-02 10:33:05 +1100272 *
273 * If compatibility mode is specified, simply return the basic unit of caching
274 * so that we don't get inefficient read/modify/write I/O from user apps.
275 * Otherwise....
276 *
277 * If the underlying volume is a stripe, then return the stripe width in bytes
278 * as the recommended I/O size. It is not a stripe and we've set a default
279 * buffered I/O size, return that, otherwise return the compat default.
280 */
281static inline unsigned long
282xfs_preferred_iosize(xfs_mount_t *mp)
283{
284 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300285 return PAGE_SIZE;
David Chinnere8c8b3a2005-11-02 10:33:05 +1100286 return (mp->m_swidth ?
287 (mp->m_swidth << mp->m_sb.sb_blocklog) :
288 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
289 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300290 PAGE_SIZE));
David Chinnere8c8b3a2005-11-02 10:33:05 +1100291}
292
David Chinner92821e22007-05-24 15:26:31 +1000293#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
294 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
Christoph Hellwig745f6912007-08-30 17:20:39 +1000296void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
297 int lnnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298#define xfs_force_shutdown(m,f) \
Christoph Hellwig745f6912007-08-30 17:20:39 +1000299 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Christoph Hellwig2b5decd2008-11-28 14:23:36 +1100301#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
302#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
303#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
304#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
305#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
306#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 * Flags for xfs_mountfs
310 */
Nathan Scott764d1f82006-03-31 13:04:17 +1000311#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Nathan Scotta844f452005-11-02 14:38:42 +1100313static inline xfs_agnumber_t
314xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315{
Eric Sandeen4f1adf32017-04-19 15:19:32 -0700316 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
Nathan Scotta844f452005-11-02 14:38:42 +1100317 do_div(ld, mp->m_sb.sb_agblocks);
318 return (xfs_agnumber_t) ld;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319}
320
Nathan Scotta844f452005-11-02 14:38:42 +1100321static inline xfs_agblock_t
322xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Eric Sandeen4f1adf32017-04-19 15:19:32 -0700324 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
Nathan Scotta844f452005-11-02 14:38:42 +1100325 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
Brian Foster801cc4e2016-03-15 11:42:44 +1100328#ifdef DEBUG
329static inline bool
Brian Foster9dbddd72017-02-13 22:48:17 -0800330xfs_mp_drop_writes(struct xfs_mount *mp)
Brian Foster801cc4e2016-03-15 11:42:44 +1100331{
Brian Foster9dbddd72017-02-13 22:48:17 -0800332 return mp->m_drop_writes;
Brian Foster801cc4e2016-03-15 11:42:44 +1100333}
334#else
335static inline bool
Brian Foster9dbddd72017-02-13 22:48:17 -0800336xfs_mp_drop_writes(struct xfs_mount *mp)
Brian Foster801cc4e2016-03-15 11:42:44 +1100337{
338 return 0;
339}
340#endif
341
Darrick J. Wong3fd129b2016-09-19 10:30:52 +1000342/* per-AG block reservation data structures*/
343enum xfs_ag_resv_type {
344 XFS_AG_RESV_NONE = 0,
345 XFS_AG_RESV_METADATA,
346 XFS_AG_RESV_AGFL,
347};
348
349struct xfs_ag_resv {
350 /* number of blocks originally reserved here */
351 xfs_extlen_t ar_orig_reserved;
352 /* number of blocks reserved here */
353 xfs_extlen_t ar_reserved;
354 /* number of blocks originally asked for */
355 xfs_extlen_t ar_asked;
356};
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358/*
Dave Chinner9356fe22013-08-12 20:49:55 +1000359 * Per-ag incore structure, copies of information in agf and agi, to improve the
Christoph Hellwig4fb6e8a2014-11-28 14:25:04 +1100360 * performance of allocation group selection.
Dave Chinner9356fe22013-08-12 20:49:55 +1000361 */
362typedef struct xfs_perag {
363 struct xfs_mount *pag_mount; /* owner filesystem */
364 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
365 atomic_t pag_ref; /* perag reference count */
366 char pagf_init; /* this agf's entry is initialized */
367 char pagi_init; /* this agi's entry is initialized */
368 char pagf_metadata; /* the agf is preferred to be metadata */
369 char pagi_inodeok; /* The agi is ok for inodes */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700370 uint8_t pagf_levels[XFS_BTNUM_AGF];
Dave Chinner9356fe22013-08-12 20:49:55 +1000371 /* # of levels in bno & cnt btree */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700372 uint32_t pagf_flcount; /* count of blocks in freelist */
Dave Chinner9356fe22013-08-12 20:49:55 +1000373 xfs_extlen_t pagf_freeblks; /* total free blocks */
374 xfs_extlen_t pagf_longest; /* longest free space */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700375 uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
Dave Chinner9356fe22013-08-12 20:49:55 +1000376 xfs_agino_t pagi_freecount; /* number of free inodes */
377 xfs_agino_t pagi_count; /* number of allocated inodes */
378
379 /*
380 * Inode allocation search lookup optimisation.
381 * If the pagino matches, the search for new inodes
382 * doesn't need to search the near ones again straight away
383 */
384 xfs_agino_t pagl_pagino;
385 xfs_agino_t pagl_leftrec;
386 xfs_agino_t pagl_rightrec;
387 spinlock_t pagb_lock; /* lock for pagb_tree */
388 struct rb_root pagb_tree; /* ordered tree of busy extents */
Christoph Hellwigebf55872017-02-07 14:06:57 -0800389 unsigned int pagb_gen; /* generation count for pagb_tree */
390 wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
Dave Chinner9356fe22013-08-12 20:49:55 +1000391
392 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
393
394 spinlock_t pag_ici_lock; /* incore inode cache lock */
395 struct radix_tree_root pag_ici_root; /* incore inode cache root */
396 int pag_ici_reclaimable; /* reclaimable inodes */
397 struct mutex pag_ici_reclaim_lock; /* serialisation point */
398 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
399
400 /* buffer cache index */
Lucas Stach6031e732016-12-07 17:36:36 +1100401 spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
402 struct rhashtable pag_buf_hash;
Dave Chinner9356fe22013-08-12 20:49:55 +1000403
404 /* for rcu-safe freeing */
405 struct rcu_head rcu_head;
406 int pagb_count; /* pagb slots in use */
Darrick J. Wong3fd129b2016-09-19 10:30:52 +1000407
408 /* Blocks reserved for all kinds of metadata. */
409 struct xfs_ag_resv pag_meta_resv;
410 /* Blocks reserved for just AGFL-based metadata. */
411 struct xfs_ag_resv pag_agfl_resv;
Darrick J. Wong46eeb522016-10-03 09:11:16 -0700412
413 /* reference count */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700414 uint8_t pagf_refcount_level;
Dave Chinner9356fe22013-08-12 20:49:55 +1000415} xfs_perag_t;
416
Darrick J. Wong3fd129b2016-09-19 10:30:52 +1000417static inline struct xfs_ag_resv *
418xfs_perag_resv(
419 struct xfs_perag *pag,
420 enum xfs_ag_resv_type type)
421{
422 switch (type) {
423 case XFS_AG_RESV_METADATA:
424 return &pag->pag_meta_resv;
425 case XFS_AG_RESV_AGFL:
426 return &pag->pag_agfl_resv;
427 default:
428 return NULL;
429 }
430}
431
Lucas Stach6031e732016-12-07 17:36:36 +1100432int xfs_buf_hash_init(xfs_perag_t *pag);
433void xfs_buf_hash_destroy(xfs_perag_t *pag);
434
Darrick J. Wongaf3b6382015-11-03 13:06:34 +1100435extern void xfs_uuid_table_free(void);
Chandra Seetharamanadab0f62011-06-29 22:10:14 +0000436extern int xfs_log_sbcount(xfs_mount_t *);
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700437extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
Christoph Hellwig42490232008-08-13 16:49:32 +1000438extern int xfs_mountfs(xfs_mount_t *mp);
Dave Chinnerff550682013-08-12 20:49:41 +1000439extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
440 xfs_agnumber_t *maxagi);
Christoph Hellwig41b5c2e2008-08-13 16:49:57 +1000441extern void xfs_unmountfs(xfs_mount_t *);
Dave Chinner964aa8d92015-02-23 21:24:37 +1100442
Dave Chinner501ab322015-02-23 21:19:28 +1100443extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
Dave Chinnere88b64e2015-02-23 21:19:53 +1100444extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
Dave Chinner0d485ad2015-02-23 21:22:03 +1100445extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
446 bool reserved);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100447extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
Nathan Scott764d1f82006-03-31 13:04:17 +1000450extern int xfs_readsb(xfs_mount_t *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451extern void xfs_freesb(xfs_mount_t *);
Brian Foster91ee5752014-11-28 14:02:59 +1100452extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700453extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Christoph Hellwigd7658d42010-02-17 19:36:13 +0000455extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
456
Dave Chinner055388a2011-01-04 11:35:03 +1100457extern void xfs_set_low_space_thresholds(struct xfs_mount *);
458
Dave Chinner3fbbbea2015-11-03 12:27:22 +1100459int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
460 xfs_off_t count_fsb);
461
Carlos Maiolinodf309392016-05-18 11:05:33 +1000462struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
463 int error_class, int error);
464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465#endif /* __XFS_MOUNT_H__ */