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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
Dave Chinner7fd36c42013-08-12 20:49:32 +100021#ifdef __KERNEL__
Barry Naujok847fff52008-10-30 17:05:38 +110022
Mark Tinguelyad223e62012-06-14 09:22:15 -050023struct xlog;
Linus Torvalds1da177e2005-04-16 15:20:36 -070024struct xfs_inode;
David Chinner2a82b8b2007-07-11 11:09:12 +100025struct xfs_mru_cache;
Barry Naujok5163f952008-05-21 16:41:01 +100026struct xfs_nameops;
David Chinner82fa9012008-10-30 17:38:26 +110027struct xfs_ail;
Christoph Hellwig7d095252009-06-08 15:33:32 +020028struct xfs_quotainfo;
29
David Chinner8d280b92006-03-14 13:13:09 +110030#ifdef HAVE_PERCPU_SB
31
32/*
33 * Valid per-cpu incore superblock counters. Note that if you add new counters,
34 * you may need to define new counter disabled bit field descriptors as there
35 * are more possible fields in the superblock that can fit in a bitfield on a
36 * 32 bit platform. The XFS_SBS_* values for the current current counters just
37 * fit.
38 */
39typedef struct xfs_icsb_cnts {
40 uint64_t icsb_fdblocks;
41 uint64_t icsb_ifree;
42 uint64_t icsb_icount;
David Chinner01e1b692006-03-14 13:29:16 +110043 unsigned long icsb_flags;
David Chinner8d280b92006-03-14 13:13:09 +110044} xfs_icsb_cnts_t;
45
David Chinner01e1b692006-03-14 13:29:16 +110046#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
47
David Chinner8d280b92006-03-14 13:13:09 +110048#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
49
50extern int xfs_icsb_init_counters(struct xfs_mount *);
Lachlan McIlroy5478eea2007-02-10 18:36:29 +110051extern void xfs_icsb_reinit_counters(struct xfs_mount *);
Christoph Hellwigc962fb72008-05-20 15:10:52 +100052extern void xfs_icsb_destroy_counters(struct xfs_mount *);
Christoph Hellwigd4d90b52008-04-22 17:34:37 +100053extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
54extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
Christoph Hellwig96540c72010-09-30 02:25:55 +000055extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
56 int64_t, int);
David Chinner8d280b92006-03-14 13:13:09 +110057
58#else
Christoph Hellwigc962fb72008-05-20 15:10:52 +100059#define xfs_icsb_init_counters(mp) (0)
60#define xfs_icsb_destroy_counters(mp) do { } while (0)
61#define xfs_icsb_reinit_counters(mp) do { } while (0)
Christoph Hellwigd4d90b52008-04-22 17:34:37 +100062#define xfs_icsb_sync_counters(mp, flags) do { } while (0)
Eric Sandeen71550542008-04-29 12:53:00 +100063#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
Christoph Hellwig96540c72010-09-30 02:25:55 +000064#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
65 xfs_mod_incore_sb(mp, field, delta, rsvd)
David Chinner8d280b92006-03-14 13:13:09 +110066#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Dave Chinner055388a2011-01-04 11:35:03 +110068/* dynamic preallocation free space thresholds, 5% down to 1% */
69enum {
70 XFS_LOWSP_1_PCNT = 0,
71 XFS_LOWSP_2_PCNT,
72 XFS_LOWSP_3_PCNT,
73 XFS_LOWSP_4_PCNT,
74 XFS_LOWSP_5_PCNT,
75 XFS_LOWSP_MAX,
76};
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078typedef struct xfs_mount {
Christoph Hellwigb267ce92007-08-30 17:21:30 +100079 struct super_block *m_super;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 xfs_tid_t m_tid; /* next unused tid for fs */
David Chinner82fa9012008-10-30 17:38:26 +110081 struct xfs_ail *m_ail; /* fs active log item list */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 xfs_sb_t m_sb; /* copy of fs superblock */
Eric Sandeen3685c2a2007-10-11 17:42:32 +100083 spinlock_t m_sb_lock; /* sb counter lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 struct xfs_buf *m_sb_bp; /* buffer for superblock */
85 char *m_fsname; /* filesystem name */
86 int m_fsname_len; /* strlen of fs name */
Nathan Scottfc1f8c12005-11-02 11:44:33 +110087 char *m_rtname; /* realtime device name */
88 char *m_logname; /* external log device name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int m_bsize; /* fs logical block size */
90 xfs_agnumber_t m_agfrotor; /* last ag where space found */
91 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
Eric Sandeen36e41ee2007-10-11 17:43:43 +100092 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 uint m_readio_log; /* min read size log bytes */
95 uint m_readio_blocks; /* min read size blocks */
96 uint m_writeio_log; /* min write size log bytes */
97 uint m_writeio_blocks; /* min write size blocks */
Mark Tinguelyad223e62012-06-14 09:22:15 -050098 struct xlog *m_log; /* log specific stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 int m_logbufs; /* number of log buffers */
100 int m_logbsize; /* size of each log buffer */
101 uint m_rsumlevels; /* rt summary levels */
102 uint m_rsumsize; /* size of rt summary, bytes */
103 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
104 struct xfs_inode *m_rsumip; /* pointer to summary inode */
105 struct xfs_inode *m_rootip; /* pointer to root directory */
106 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
107 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
108 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
109 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 __uint8_t m_blkbit_log; /* blocklog + NBBY */
111 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
112 __uint8_t m_agno_log; /* log #ag's */
113 __uint8_t m_agino_log; /* #bits for agino in inum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 __uint16_t m_inode_cluster_size;/* min inode buf size */
115 uint m_blockmask; /* sb_blocksize-1 */
116 uint m_blockwsize; /* sb_blocksize in words */
117 uint m_blockwmask; /* blockwsize-1 */
Christoph Hellwig60197e82008-10-30 17:11:19 +1100118 uint m_alloc_mxr[2]; /* max alloc btree records */
119 uint m_alloc_mnr[2]; /* min alloc btree records */
120 uint m_bmap_dmxr[2]; /* max bmap btree records */
121 uint m_bmap_dmnr[2]; /* min bmap btree records */
122 uint m_inobt_mxr[2]; /* max inobt btree records */
123 uint m_inobt_mnr[2]; /* min inobt btree records */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
125 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
Christoph Hellwig0d87e652009-02-09 08:37:14 +0100126 uint m_in_maxlevels; /* max inobt btree levels. */
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000127 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
128 spinlock_t m_perag_lock; /* lock for m_perag_tree */
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000129 struct mutex m_growlock; /* growfs mutex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 int m_fixedfsid[2]; /* unchanged for life of FS */
131 uint m_dmevmask; /* DMI events for this FS */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100132 __uint64_t m_flags; /* global mount flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 uint m_dir_node_ents; /* #entries in a dir danode */
134 uint m_attr_node_ents; /* #entries in attr danode */
135 int m_ialloc_inos; /* inodes in inode allocation */
136 int m_ialloc_blks; /* blocks in inode allocation */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 int m_inoalign_mask;/* mask sb_inoalignmt if used */
138 uint m_qflags; /* quota status flags */
Jie Liu0eadd102013-08-12 20:49:56 +1000139 struct xfs_trans_resv m_resv; /* precomputed res values */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 __uint64_t m_maxicount; /* maximum inode count */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 __uint64_t m_resblks; /* total reserved blocks */
142 __uint64_t m_resblks_avail;/* available reserved blocks */
Dave Chinnercbe132a2010-01-26 15:08:49 +1100143 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 int m_dalign; /* stripe unit */
145 int m_swidth; /* stripe width */
Nathan Scottc41564b2006-03-29 08:55:14 +1000146 int m_sinoalign; /* stripe unit inode alignment */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 int m_attr_magicpct;/* 37% of the blocksize */
148 int m_dir_magicpct; /* 37% of the dir blocksize */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
Barry Naujok5163f952008-05-21 16:41:01 +1000150 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 int m_dirblksize; /* directory block sz--bytes */
152 int m_dirblkfsbs; /* directory block sz--fsbs */
153 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */
154 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */
155 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */
156 uint m_chsize; /* size of next field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 atomic_t m_active_trans; /* number trans frozen */
David Chinner8d280b92006-03-14 13:13:09 +1100158#ifdef HAVE_PERCPU_SB
Tejun Heo003cb602010-02-02 14:39:01 +0900159 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
David Chinner8d280b92006-03-14 13:13:09 +1100160 unsigned long m_icsb_counters; /* disabled per-cpu counters */
David Chinnere8234a62006-03-14 13:23:52 +1100161 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
David Chinner20b64282007-02-10 18:35:09 +1100162 struct mutex m_icsb_mutex; /* balancer sync lock */
David Chinner8d280b92006-03-14 13:13:09 +1100163#endif
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 */
Christoph Hellwig7884bc82009-01-19 02:04:07 +0100168 __int64_t m_update_flags; /* sb flags we need to update
169 on the next remount,rw */
Dave Chinner055388a2011-01-04 11:35:03 +1100170 int64_t m_low_space[XFS_LOWSP_MAX];
171 /* low free space thresholds */
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000172
173 struct workqueue_struct *m_data_workqueue;
174 struct workqueue_struct *m_unwritten_workqueue;
Dave Chinner4c2d5422012-04-23 17:54:32 +1000175 struct workqueue_struct *m_cil_workqueue;
Dave Chinner58896082012-10-08 21:56:05 +1100176 struct workqueue_struct *m_reclaim_workqueue;
177 struct workqueue_struct *m_log_workqueue;
Brian Foster579b62f2012-11-06 09:50:47 -0500178 struct workqueue_struct *m_eofblocks_workqueue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179} xfs_mount_t;
180
181/*
182 * Flags for m_flags.
183 */
David Chinner92821e22007-05-24 15:26:31 +1000184#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 must be synchronous except
186 for space allocations */
David Chinner92821e22007-05-24 15:26:31 +1000187#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
Nathan Scotte718eeb42005-11-02 15:09:22 +1100188#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 operations, typically for
190 disk errors in metadata */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000191#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100192#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 allocations */
Nathan Scott13059ff2006-01-11 15:32:01 +1100194#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000195#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100196#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100197#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100198#define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * 32 bits in size */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000200#define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100201#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
202#define XFS_MOUNT_BARRIER (1ULL << 17)
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100203#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
Nathan Scotte718eeb42005-11-02 15:09:22 +1100204#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 * allocation */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000206#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100207#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
208#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
David Chinnere8c8b3a2005-11-02 10:33:05 +1100209 * I/O size in stat() */
David Chinner2a82b8b2007-07-11 11:09:12 +1000210#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
211 allocator */
Tim Shimmin7c12f292008-04-30 18:15:28 +1000212#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
David Chinnere8c8b3a2005-11-02 10:33:05 +1100213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215/*
216 * Default minimum read and write sizes.
217 */
218#define XFS_READIO_LOG_LARGE 16
219#define XFS_WRITEIO_LOG_LARGE 16
220
221/*
Nathan Scott1f443ad2005-05-05 13:28:29 -0700222 * Max and min values for mount-option defined I/O
223 * preallocation sizes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 */
Nathan Scott1f443ad2005-05-05 13:28:29 -0700225#define XFS_MAX_IO_LOG 30 /* 1G */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226#define XFS_MIN_IO_LOG PAGE_SHIFT
227
228/*
229 * Synchronous read and write sizes. This should be
230 * better for NFSv2 wsync filesystems.
231 */
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200232#define XFS_WSYNC_READIO_LOG 15 /* 32k */
233#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
David Chinnere8c8b3a2005-11-02 10:33:05 +1100235/*
236 * Allow large block sizes to be reported to userspace programs if the
Barry Naujok556b8b12008-04-10 12:22:07 +1000237 * "largeio" mount option is used.
David Chinnere8c8b3a2005-11-02 10:33:05 +1100238 *
239 * If compatibility mode is specified, simply return the basic unit of caching
240 * so that we don't get inefficient read/modify/write I/O from user apps.
241 * Otherwise....
242 *
243 * If the underlying volume is a stripe, then return the stripe width in bytes
244 * as the recommended I/O size. It is not a stripe and we've set a default
245 * buffered I/O size, return that, otherwise return the compat default.
246 */
247static inline unsigned long
248xfs_preferred_iosize(xfs_mount_t *mp)
249{
250 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
251 return PAGE_CACHE_SIZE;
252 return (mp->m_swidth ?
253 (mp->m_swidth << mp->m_sb.sb_blocklog) :
254 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
255 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
256 PAGE_CACHE_SIZE));
257}
258
David Chinner92821e22007-05-24 15:26:31 +1000259#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
260 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
Christoph Hellwig745f6912007-08-30 17:20:39 +1000262void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
263 int lnnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264#define xfs_force_shutdown(m,f) \
Christoph Hellwig745f6912007-08-30 17:20:39 +1000265 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Christoph Hellwig2b5decd2008-11-28 14:23:36 +1100267#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
268#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
269#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
270#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
271#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
272#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 * Flags for xfs_mountfs
276 */
Nathan Scott764d1f82006-03-31 13:04:17 +1000277#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Nathan Scotta844f452005-11-02 14:38:42 +1100279static inline xfs_agnumber_t
280xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281{
Nathan Scotta844f452005-11-02 14:38:42 +1100282 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
283 do_div(ld, mp->m_sb.sb_agblocks);
284 return (xfs_agnumber_t) ld;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
Nathan Scotta844f452005-11-02 14:38:42 +1100287static inline xfs_agblock_t
288xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
Nathan Scotta844f452005-11-02 14:38:42 +1100290 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
291 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292}
293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294/*
David Chinner03135cf2007-02-10 18:35:15 +1100295 * Per-cpu superblock locking functions
296 */
297#ifdef HAVE_PERCPU_SB
Christoph Hellwigb8f82a42009-11-14 16:17:22 +0000298static inline void
David Chinner03135cf2007-02-10 18:35:15 +1100299xfs_icsb_lock(xfs_mount_t *mp)
300{
301 mutex_lock(&mp->m_icsb_mutex);
302}
303
Christoph Hellwigb8f82a42009-11-14 16:17:22 +0000304static inline void
David Chinner03135cf2007-02-10 18:35:15 +1100305xfs_icsb_unlock(xfs_mount_t *mp)
306{
307 mutex_unlock(&mp->m_icsb_mutex);
308}
309#else
310#define xfs_icsb_lock(mp)
311#define xfs_icsb_unlock(mp)
312#endif
313
314/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
David Chinner20f4ebf2007-02-10 18:36:10 +1100316 * xfs_growfs can specify a few fields which are more than int limit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 */
318typedef struct xfs_mod_sb {
319 xfs_sb_field_t msb_field; /* Field to modify, see below */
David Chinner20f4ebf2007-02-10 18:36:10 +1100320 int64_t msb_delta; /* Change to make to specified field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321} xfs_mod_sb_t;
322
Dave Chinner9356fe22013-08-12 20:49:55 +1000323/*
324 * Per-ag incore structure, copies of information in agf and agi, to improve the
325 * performance of allocation group selection. This is defined for the kernel
326 * only, and hence is defined here instead of in xfs_ag.h. You need the struct
327 * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree),
328 * so this doesn't introduce any strange header file dependencies.
329 */
330typedef struct xfs_perag {
331 struct xfs_mount *pag_mount; /* owner filesystem */
332 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
333 atomic_t pag_ref; /* perag reference count */
334 char pagf_init; /* this agf's entry is initialized */
335 char pagi_init; /* this agi's entry is initialized */
336 char pagf_metadata; /* the agf is preferred to be metadata */
337 char pagi_inodeok; /* The agi is ok for inodes */
338 __uint8_t pagf_levels[XFS_BTNUM_AGF];
339 /* # of levels in bno & cnt btree */
340 __uint32_t pagf_flcount; /* count of blocks in freelist */
341 xfs_extlen_t pagf_freeblks; /* total free blocks */
342 xfs_extlen_t pagf_longest; /* longest free space */
343 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
344 xfs_agino_t pagi_freecount; /* number of free inodes */
345 xfs_agino_t pagi_count; /* number of allocated inodes */
346
347 /*
348 * Inode allocation search lookup optimisation.
349 * If the pagino matches, the search for new inodes
350 * doesn't need to search the near ones again straight away
351 */
352 xfs_agino_t pagl_pagino;
353 xfs_agino_t pagl_leftrec;
354 xfs_agino_t pagl_rightrec;
355 spinlock_t pagb_lock; /* lock for pagb_tree */
356 struct rb_root pagb_tree; /* ordered tree of busy extents */
357
358 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
359
360 spinlock_t pag_ici_lock; /* incore inode cache lock */
361 struct radix_tree_root pag_ici_root; /* incore inode cache root */
362 int pag_ici_reclaimable; /* reclaimable inodes */
363 struct mutex pag_ici_reclaim_lock; /* serialisation point */
364 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
365
366 /* buffer cache index */
367 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */
368 struct rb_root pag_buf_tree; /* ordered tree of active buffers */
369
370 /* for rcu-safe freeing */
371 struct rcu_head rcu_head;
372 int pagb_count; /* pagb slots in use */
373} xfs_perag_t;
374
Chandra Seetharamanadab0f62011-06-29 22:10:14 +0000375extern int xfs_log_sbcount(xfs_mount_t *);
Eric Sandeend5db0f92010-02-05 22:59:53 +0000376extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
Christoph Hellwig42490232008-08-13 16:49:32 +1000377extern int xfs_mountfs(xfs_mount_t *mp);
Dave Chinnerff550682013-08-12 20:49:41 +1000378extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
379 xfs_agnumber_t *maxagi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Christoph Hellwig41b5c2e2008-08-13 16:49:57 +1000381extern void xfs_unmountfs(xfs_mount_t *);
David Chinner20f4ebf2007-02-10 18:36:10 +1100382extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
384 uint, int);
Christoph Hellwig7884bc82009-01-19 02:04:07 +0100385extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
Nathan Scott764d1f82006-03-31 13:04:17 +1000387extern int xfs_readsb(xfs_mount_t *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388extern void xfs_freesb(xfs_mount_t *);
David Chinner92821e22007-05-24 15:26:31 +1000389extern int xfs_fs_writable(xfs_mount_t *);
Nathan Scott4cc929e2007-05-14 18:24:02 +1000390extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Christoph Hellwigd7658d42010-02-17 19:36:13 +0000392extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
393
Dave Chinner055388a2011-01-04 11:35:03 +1100394extern void xfs_set_low_space_thresholds(struct xfs_mount *);
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396#endif /* __KERNEL__ */
397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398#endif /* __XFS_MOUNT_H__ */