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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
Linus Torvalds1da177e2005-04-16 15:20:36 -070040typedef struct xfs_mount {
Christoph Hellwigb267ce92007-08-30 17:21:30 +100041 struct super_block *m_super;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 xfs_tid_t m_tid; /* next unused tid for fs */
David Chinner82fa9012008-10-30 17:38:26 +110043 struct xfs_ail *m_ail; /* fs active log item list */
Dave Chinner501ab322015-02-23 21:19:28 +110044
45 struct xfs_sb m_sb; /* copy of fs superblock */
Eric Sandeen3685c2a2007-10-11 17:42:32 +100046 spinlock_t m_sb_lock; /* sb counter lock */
Dave Chinner501ab322015-02-23 21:19:28 +110047 struct percpu_counter m_icount; /* allocated inodes counter */
Dave Chinnere88b64e2015-02-23 21:19:53 +110048 struct percpu_counter m_ifree; /* free inodes counter */
Dave Chinner0d485ad2015-02-23 21:22:03 +110049 struct percpu_counter m_fdblocks; /* free block counter */
Dave Chinner501ab322015-02-23 21:19:28 +110050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 struct xfs_buf *m_sb_bp; /* buffer for superblock */
52 char *m_fsname; /* filesystem name */
53 int m_fsname_len; /* strlen of fs name */
Nathan Scottfc1f8c12005-11-02 11:44:33 +110054 char *m_rtname; /* realtime device name */
55 char *m_logname; /* external log device name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 int m_bsize; /* fs logical block size */
57 xfs_agnumber_t m_agfrotor; /* last ag where space found */
58 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
Eric Sandeen36e41ee2007-10-11 17:43:43 +100059 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 uint m_readio_log; /* min read size log bytes */
62 uint m_readio_blocks; /* min read size blocks */
63 uint m_writeio_log; /* min write size log bytes */
64 uint m_writeio_blocks; /* min write size blocks */
Dave Chinner0650b552014-06-06 15:01:58 +100065 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
66 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
Mark Tinguelyad223e62012-06-14 09:22:15 -050067 struct xlog *m_log; /* log specific stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 int m_logbufs; /* number of log buffers */
69 int m_logbsize; /* size of each log buffer */
70 uint m_rsumlevels; /* rt summary levels */
71 uint m_rsumsize; /* size of rt summary, bytes */
72 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
73 struct xfs_inode *m_rsumip; /* pointer to summary inode */
74 struct xfs_inode *m_rootip; /* pointer to root directory */
75 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
76 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
77 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
78 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 __uint8_t m_blkbit_log; /* blocklog + NBBY */
80 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
81 __uint8_t m_agno_log; /* log #ag's */
82 __uint8_t m_agino_log; /* #bits for agino in inum */
Dave Chinner8f805872013-11-01 15:27:20 +110083 uint m_inode_cluster_size;/* min inode buf size */
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 uint m_blockmask; /* sb_blocksize-1 */
85 uint m_blockwsize; /* sb_blocksize in words */
86 uint m_blockwmask; /* blockwsize-1 */
Christoph Hellwig60197e82008-10-30 17:11:19 +110087 uint m_alloc_mxr[2]; /* max alloc btree records */
88 uint m_alloc_mnr[2]; /* min alloc btree records */
89 uint m_bmap_dmxr[2]; /* max bmap btree records */
90 uint m_bmap_dmnr[2]; /* min bmap btree records */
91 uint m_inobt_mxr[2]; /* max inobt btree records */
92 uint m_inobt_mnr[2]; /* min inobt btree records */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
94 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
Christoph Hellwig0d87e652009-02-09 08:37:14 +010095 uint m_in_maxlevels; /* max inobt btree levels. */
Dave Chinner1c1c6eb2010-01-11 11:47:44 +000096 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
97 spinlock_t m_perag_lock; /* lock for m_perag_tree */
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +100098 struct mutex m_growlock; /* growfs mutex */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 int m_fixedfsid[2]; /* unchanged for life of FS */
100 uint m_dmevmask; /* DMI events for this FS */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100101 __uint64_t m_flags; /* global mount flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 int m_ialloc_inos; /* inodes in inode allocation */
103 int m_ialloc_blks; /* blocks in inode allocation */
Brian Foster066a1882015-05-29 08:55:20 +1000104 int m_ialloc_min_blks;/* min blocks in sparse inode
105 * allocation */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 int m_inoalign_mask;/* mask sb_inoalignmt if used */
107 uint m_qflags; /* quota status flags */
Jie Liu0eadd102013-08-12 20:49:56 +1000108 struct xfs_trans_resv m_resv; /* precomputed res values */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 __uint64_t m_maxicount; /* maximum inode count */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 __uint64_t m_resblks; /* total reserved blocks */
111 __uint64_t m_resblks_avail;/* available reserved blocks */
Dave Chinnercbe132a2010-01-26 15:08:49 +1100112 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 int m_dalign; /* stripe unit */
114 int m_swidth; /* stripe width */
Nathan Scottc41564b2006-03-29 08:55:14 +1000115 int m_sinoalign; /* stripe unit inode alignment */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
Barry Naujok5163f952008-05-21 16:41:01 +1000117 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
Dave Chinner32c54832013-10-29 22:11:46 +1100118 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
Dave Chinner4bceb182013-10-29 22:11:51 +1100119 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 uint m_chsize; /* size of next field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 atomic_t m_active_trans; /* number trans frozen */
David Chinner2a82b8b2007-07-11 11:09:12 +1000122 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
Dave Chinnera7b339f2011-04-08 12:45:07 +1000123 struct delayed_work m_reclaim_work; /* background inode reclaim */
Brian Foster579b62f2012-11-06 09:50:47 -0500124 struct delayed_work m_eofblocks_work; /* background eof blocks
125 trimming */
Dave Chinner61e63ec2015-01-22 09:10:31 +1100126 bool m_update_sb; /* sb needs update in mount */
Dave Chinner055388a2011-01-04 11:35:03 +1100127 int64_t m_low_space[XFS_LOWSP_MAX];
128 /* low free space thresholds */
Brian Fostera31b1d32014-07-15 08:07:01 +1000129 struct xfs_kobj m_kobj;
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000130
Brian Foster78c931b2014-11-28 13:59:58 +1100131 struct workqueue_struct *m_buf_workqueue;
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000132 struct workqueue_struct *m_data_workqueue;
133 struct workqueue_struct *m_unwritten_workqueue;
Dave Chinner4c2d5422012-04-23 17:54:32 +1000134 struct workqueue_struct *m_cil_workqueue;
Dave Chinner58896082012-10-08 21:56:05 +1100135 struct workqueue_struct *m_reclaim_workqueue;
136 struct workqueue_struct *m_log_workqueue;
Brian Foster579b62f2012-11-06 09:50:47 -0500137 struct workqueue_struct *m_eofblocks_workqueue;
Christoph Hellwig52785112015-02-16 11:49:23 +1100138
139 /*
140 * Generation of the filesysyem layout. This is incremented by each
141 * growfs, and used by the pNFS server to ensure the client updates
142 * its view of the block device once it gets a layout that might
143 * reference the newly added blocks. Does not need to be persistent
144 * as long as we only allow file system size increments, but if we
145 * ever support shrinks it would have to be persisted in addition
146 * to various other kinds of pain inflicted on the pNFS server.
147 */
148 __uint32_t m_generation;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149} xfs_mount_t;
150
151/*
152 * Flags for m_flags.
153 */
David Chinner92821e22007-05-24 15:26:31 +1000154#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 must be synchronous except
156 for space allocations */
David Chinner92821e22007-05-24 15:26:31 +1000157#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
Nathan Scotte718eeb42005-11-02 15:09:22 +1100158#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 operations, typically for
160 disk errors in metadata */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000161#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100162#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 allocations */
Nathan Scott13059ff2006-01-11 15:32:01 +1100164#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000165#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100166#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100167#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100168#define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 * 32 bits in size */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000170#define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100171#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
172#define XFS_MOUNT_BARRIER (1ULL << 17)
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100173#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
Nathan Scotte718eeb42005-11-02 15:09:22 +1100174#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 * allocation */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000176#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100177#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
178#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
David Chinnere8c8b3a2005-11-02 10:33:05 +1100179 * I/O size in stat() */
David Chinner2a82b8b2007-07-11 11:09:12 +1000180#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
181 allocator */
Tim Shimmin7c12f292008-04-30 18:15:28 +1000182#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
David Chinnere8c8b3a2005-11-02 10:33:05 +1100183
Dave Chinnercbe4dab2015-06-04 09:19:18 +1000184#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187/*
188 * Default minimum read and write sizes.
189 */
190#define XFS_READIO_LOG_LARGE 16
191#define XFS_WRITEIO_LOG_LARGE 16
192
193/*
Nathan Scott1f443ad2005-05-05 13:28:29 -0700194 * Max and min values for mount-option defined I/O
195 * preallocation sizes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 */
Nathan Scott1f443ad2005-05-05 13:28:29 -0700197#define XFS_MAX_IO_LOG 30 /* 1G */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198#define XFS_MIN_IO_LOG PAGE_SHIFT
199
200/*
201 * Synchronous read and write sizes. This should be
202 * better for NFSv2 wsync filesystems.
203 */
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200204#define XFS_WSYNC_READIO_LOG 15 /* 32k */
205#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
David Chinnere8c8b3a2005-11-02 10:33:05 +1100207/*
208 * Allow large block sizes to be reported to userspace programs if the
Barry Naujok556b8b12008-04-10 12:22:07 +1000209 * "largeio" mount option is used.
David Chinnere8c8b3a2005-11-02 10:33:05 +1100210 *
211 * If compatibility mode is specified, simply return the basic unit of caching
212 * so that we don't get inefficient read/modify/write I/O from user apps.
213 * Otherwise....
214 *
215 * If the underlying volume is a stripe, then return the stripe width in bytes
216 * as the recommended I/O size. It is not a stripe and we've set a default
217 * buffered I/O size, return that, otherwise return the compat default.
218 */
219static inline unsigned long
220xfs_preferred_iosize(xfs_mount_t *mp)
221{
222 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
223 return PAGE_CACHE_SIZE;
224 return (mp->m_swidth ?
225 (mp->m_swidth << mp->m_sb.sb_blocklog) :
226 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
227 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
228 PAGE_CACHE_SIZE));
229}
230
David Chinner92821e22007-05-24 15:26:31 +1000231#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
232 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
Christoph Hellwig745f6912007-08-30 17:20:39 +1000234void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
235 int lnnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236#define xfs_force_shutdown(m,f) \
Christoph Hellwig745f6912007-08-30 17:20:39 +1000237 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Christoph Hellwig2b5decd2008-11-28 14:23:36 +1100239#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
240#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
241#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
242#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
243#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
244#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 * Flags for xfs_mountfs
248 */
Nathan Scott764d1f82006-03-31 13:04:17 +1000249#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Nathan Scotta844f452005-11-02 14:38:42 +1100251static inline xfs_agnumber_t
252xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
Nathan Scotta844f452005-11-02 14:38:42 +1100254 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
255 do_div(ld, mp->m_sb.sb_agblocks);
256 return (xfs_agnumber_t) ld;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257}
258
Nathan Scotta844f452005-11-02 14:38:42 +1100259static inline xfs_agblock_t
260xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Nathan Scotta844f452005-11-02 14:38:42 +1100262 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
263 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264}
265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266/*
Dave Chinner9356fe22013-08-12 20:49:55 +1000267 * Per-ag incore structure, copies of information in agf and agi, to improve the
Christoph Hellwig4fb6e8a2014-11-28 14:25:04 +1100268 * performance of allocation group selection.
Dave Chinner9356fe22013-08-12 20:49:55 +1000269 */
270typedef struct xfs_perag {
271 struct xfs_mount *pag_mount; /* owner filesystem */
272 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
273 atomic_t pag_ref; /* perag reference count */
274 char pagf_init; /* this agf's entry is initialized */
275 char pagi_init; /* this agi's entry is initialized */
276 char pagf_metadata; /* the agf is preferred to be metadata */
277 char pagi_inodeok; /* The agi is ok for inodes */
278 __uint8_t pagf_levels[XFS_BTNUM_AGF];
279 /* # of levels in bno & cnt btree */
280 __uint32_t pagf_flcount; /* count of blocks in freelist */
281 xfs_extlen_t pagf_freeblks; /* total free blocks */
282 xfs_extlen_t pagf_longest; /* longest free space */
283 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
284 xfs_agino_t pagi_freecount; /* number of free inodes */
285 xfs_agino_t pagi_count; /* number of allocated inodes */
286
287 /*
288 * Inode allocation search lookup optimisation.
289 * If the pagino matches, the search for new inodes
290 * doesn't need to search the near ones again straight away
291 */
292 xfs_agino_t pagl_pagino;
293 xfs_agino_t pagl_leftrec;
294 xfs_agino_t pagl_rightrec;
295 spinlock_t pagb_lock; /* lock for pagb_tree */
296 struct rb_root pagb_tree; /* ordered tree of busy extents */
297
298 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
299
300 spinlock_t pag_ici_lock; /* incore inode cache lock */
301 struct radix_tree_root pag_ici_root; /* incore inode cache root */
302 int pag_ici_reclaimable; /* reclaimable inodes */
303 struct mutex pag_ici_reclaim_lock; /* serialisation point */
304 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
305
306 /* buffer cache index */
307 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */
308 struct rb_root pag_buf_tree; /* ordered tree of active buffers */
309
310 /* for rcu-safe freeing */
311 struct rcu_head rcu_head;
312 int pagb_count; /* pagb slots in use */
313} xfs_perag_t;
314
Chandra Seetharamanadab0f62011-06-29 22:10:14 +0000315extern int xfs_log_sbcount(xfs_mount_t *);
Eric Sandeend5db0f92010-02-05 22:59:53 +0000316extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
Christoph Hellwig42490232008-08-13 16:49:32 +1000317extern int xfs_mountfs(xfs_mount_t *mp);
Dave Chinnerff550682013-08-12 20:49:41 +1000318extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
319 xfs_agnumber_t *maxagi);
Christoph Hellwig41b5c2e2008-08-13 16:49:57 +1000320extern void xfs_unmountfs(xfs_mount_t *);
Dave Chinner964aa8d92015-02-23 21:24:37 +1100321
Dave Chinner501ab322015-02-23 21:19:28 +1100322extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
Dave Chinnere88b64e2015-02-23 21:19:53 +1100323extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
Dave Chinner0d485ad2015-02-23 21:22:03 +1100324extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
325 bool reserved);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100326extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
327
Dave Chinner4d11a402015-01-22 09:10:26 +1100328extern int xfs_mount_log_sb(xfs_mount_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
Nathan Scott764d1f82006-03-31 13:04:17 +1000330extern int xfs_readsb(xfs_mount_t *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331extern void xfs_freesb(xfs_mount_t *);
Brian Foster91ee5752014-11-28 14:02:59 +1100332extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
Nathan Scott4cc929e2007-05-14 18:24:02 +1000333extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Christoph Hellwigd7658d42010-02-17 19:36:13 +0000335extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
336
Dave Chinner055388a2011-01-04 11:35:03 +1100337extern void xfs_set_low_space_thresholds(struct xfs_mount *);
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339#endif /* __XFS_MOUNT_H__ */