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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;
Dave Chinner32c54832013-10-29 22:11:46 +110029struct xfs_dir_ops;
Dave Chinner0650b552014-06-06 15:01:58 +100030struct xfs_da_geometry;
Christoph Hellwig7d095252009-06-08 15:33:32 +020031
David Chinner8d280b92006-03-14 13:13:09 +110032#ifdef HAVE_PERCPU_SB
33
34/*
35 * Valid per-cpu incore superblock counters. Note that if you add new counters,
36 * you may need to define new counter disabled bit field descriptors as there
37 * are more possible fields in the superblock that can fit in a bitfield on a
38 * 32 bit platform. The XFS_SBS_* values for the current current counters just
39 * fit.
40 */
41typedef struct xfs_icsb_cnts {
42 uint64_t icsb_fdblocks;
43 uint64_t icsb_ifree;
44 uint64_t icsb_icount;
David Chinner01e1b692006-03-14 13:29:16 +110045 unsigned long icsb_flags;
David Chinner8d280b92006-03-14 13:13:09 +110046} xfs_icsb_cnts_t;
47
David Chinner01e1b692006-03-14 13:29:16 +110048#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
49
David Chinner8d280b92006-03-14 13:13:09 +110050#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
51
52extern int xfs_icsb_init_counters(struct xfs_mount *);
Lachlan McIlroy5478eea2007-02-10 18:36:29 +110053extern void xfs_icsb_reinit_counters(struct xfs_mount *);
Christoph Hellwigc962fb72008-05-20 15:10:52 +100054extern void xfs_icsb_destroy_counters(struct xfs_mount *);
Christoph Hellwigd4d90b52008-04-22 17:34:37 +100055extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
56extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
Christoph Hellwig96540c72010-09-30 02:25:55 +000057extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
58 int64_t, int);
David Chinner8d280b92006-03-14 13:13:09 +110059
60#else
Christoph Hellwigc962fb72008-05-20 15:10:52 +100061#define xfs_icsb_init_counters(mp) (0)
62#define xfs_icsb_destroy_counters(mp) do { } while (0)
63#define xfs_icsb_reinit_counters(mp) do { } while (0)
Christoph Hellwigd4d90b52008-04-22 17:34:37 +100064#define xfs_icsb_sync_counters(mp, flags) do { } while (0)
Eric Sandeen71550542008-04-29 12:53:00 +100065#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
Christoph Hellwig96540c72010-09-30 02:25:55 +000066#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
67 xfs_mod_incore_sb(mp, field, delta, rsvd)
David Chinner8d280b92006-03-14 13:13:09 +110068#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Dave Chinner055388a2011-01-04 11:35:03 +110070/* dynamic preallocation free space thresholds, 5% down to 1% */
71enum {
72 XFS_LOWSP_1_PCNT = 0,
73 XFS_LOWSP_2_PCNT,
74 XFS_LOWSP_3_PCNT,
75 XFS_LOWSP_4_PCNT,
76 XFS_LOWSP_5_PCNT,
77 XFS_LOWSP_MAX,
78};
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080typedef struct xfs_mount {
Christoph Hellwigb267ce92007-08-30 17:21:30 +100081 struct super_block *m_super;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 xfs_tid_t m_tid; /* next unused tid for fs */
David Chinner82fa9012008-10-30 17:38:26 +110083 struct xfs_ail *m_ail; /* fs active log item list */
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 xfs_sb_t m_sb; /* copy of fs superblock */
Eric Sandeen3685c2a2007-10-11 17:42:32 +100085 spinlock_t m_sb_lock; /* sb counter lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 struct xfs_buf *m_sb_bp; /* buffer for superblock */
87 char *m_fsname; /* filesystem name */
88 int m_fsname_len; /* strlen of fs name */
Nathan Scottfc1f8c12005-11-02 11:44:33 +110089 char *m_rtname; /* realtime device name */
90 char *m_logname; /* external log device name */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 int m_bsize; /* fs logical block size */
92 xfs_agnumber_t m_agfrotor; /* last ag where space found */
93 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
Eric Sandeen36e41ee2007-10-11 17:43:43 +100094 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 uint m_readio_log; /* min read size log bytes */
97 uint m_readio_blocks; /* min read size blocks */
98 uint m_writeio_log; /* min write size log bytes */
99 uint m_writeio_blocks; /* min write size blocks */
Dave Chinner0650b552014-06-06 15:01:58 +1000100 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
101 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
Mark Tinguelyad223e62012-06-14 09:22:15 -0500102 struct xlog *m_log; /* log specific stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 int m_logbufs; /* number of log buffers */
104 int m_logbsize; /* size of each log buffer */
105 uint m_rsumlevels; /* rt summary levels */
106 uint m_rsumsize; /* size of rt summary, bytes */
107 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
108 struct xfs_inode *m_rsumip; /* pointer to summary inode */
109 struct xfs_inode *m_rootip; /* pointer to root directory */
110 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
111 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
112 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
113 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 __uint8_t m_blkbit_log; /* blocklog + NBBY */
115 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
116 __uint8_t m_agno_log; /* log #ag's */
117 __uint8_t m_agino_log; /* #bits for agino in inum */
Dave Chinner8f805872013-11-01 15:27:20 +1100118 uint m_inode_cluster_size;/* min inode buf size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 uint m_blockmask; /* sb_blocksize-1 */
120 uint m_blockwsize; /* sb_blocksize in words */
121 uint m_blockwmask; /* blockwsize-1 */
Christoph Hellwig60197e82008-10-30 17:11:19 +1100122 uint m_alloc_mxr[2]; /* max alloc btree records */
123 uint m_alloc_mnr[2]; /* min alloc btree records */
124 uint m_bmap_dmxr[2]; /* max bmap btree records */
125 uint m_bmap_dmnr[2]; /* min bmap btree records */
126 uint m_inobt_mxr[2]; /* max inobt btree records */
127 uint m_inobt_mnr[2]; /* min inobt btree records */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
129 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
Christoph Hellwig0d87e652009-02-09 08:37:14 +0100130 uint m_in_maxlevels; /* max inobt btree levels. */
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000131 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
132 spinlock_t m_perag_lock; /* lock for m_perag_tree */
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000133 struct mutex m_growlock; /* growfs mutex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 int m_fixedfsid[2]; /* unchanged for life of FS */
135 uint m_dmevmask; /* DMI events for this FS */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100136 __uint64_t m_flags; /* global mount flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 int m_ialloc_inos; /* inodes in inode allocation */
138 int m_ialloc_blks; /* blocks in inode allocation */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 int m_inoalign_mask;/* mask sb_inoalignmt if used */
140 uint m_qflags; /* quota status flags */
Jie Liu0eadd102013-08-12 20:49:56 +1000141 struct xfs_trans_resv m_resv; /* precomputed res values */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 __uint64_t m_maxicount; /* maximum inode count */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 __uint64_t m_resblks; /* total reserved blocks */
144 __uint64_t m_resblks_avail;/* available reserved blocks */
Dave Chinnercbe132a2010-01-26 15:08:49 +1100145 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 int m_dalign; /* stripe unit */
147 int m_swidth; /* stripe width */
Nathan Scottc41564b2006-03-29 08:55:14 +1000148 int m_sinoalign; /* stripe unit inode alignment */
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 */
Dave Chinner32c54832013-10-29 22:11:46 +1100151 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
Dave Chinner4bceb182013-10-29 22:11:51 +1100152 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 uint m_chsize; /* size of next field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 atomic_t m_active_trans; /* number trans frozen */
David Chinner8d280b92006-03-14 13:13:09 +1100155#ifdef HAVE_PERCPU_SB
Tejun Heo003cb602010-02-02 14:39:01 +0900156 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
David Chinner8d280b92006-03-14 13:13:09 +1100157 unsigned long m_icsb_counters; /* disabled per-cpu counters */
David Chinnere8234a62006-03-14 13:23:52 +1100158 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
David Chinner20b64282007-02-10 18:35:09 +1100159 struct mutex m_icsb_mutex; /* balancer sync lock */
David Chinner8d280b92006-03-14 13:13:09 +1100160#endif
David Chinner2a82b8b2007-07-11 11:09:12 +1000161 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
Dave Chinnera7b339f2011-04-08 12:45:07 +1000162 struct delayed_work m_reclaim_work; /* background inode reclaim */
Brian Foster579b62f2012-11-06 09:50:47 -0500163 struct delayed_work m_eofblocks_work; /* background eof blocks
164 trimming */
Christoph Hellwig7884bc82009-01-19 02:04:07 +0100165 __int64_t m_update_flags; /* sb flags we need to update
166 on the next remount,rw */
Dave Chinner055388a2011-01-04 11:35:03 +1100167 int64_t m_low_space[XFS_LOWSP_MAX];
168 /* low free space thresholds */
Brian Fostera31b1d32014-07-15 08:07:01 +1000169 struct xfs_kobj m_kobj;
Christoph Hellwigaa6bf012012-02-29 09:53:48 +0000170
171 struct workqueue_struct *m_data_workqueue;
172 struct workqueue_struct *m_unwritten_workqueue;
Dave Chinner4c2d5422012-04-23 17:54:32 +1000173 struct workqueue_struct *m_cil_workqueue;
Dave Chinner58896082012-10-08 21:56:05 +1100174 struct workqueue_struct *m_reclaim_workqueue;
175 struct workqueue_struct *m_log_workqueue;
Brian Foster579b62f2012-11-06 09:50:47 -0500176 struct workqueue_struct *m_eofblocks_workqueue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177} xfs_mount_t;
178
179/*
180 * Flags for m_flags.
181 */
David Chinner92821e22007-05-24 15:26:31 +1000182#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 must be synchronous except
184 for space allocations */
David Chinner92821e22007-05-24 15:26:31 +1000185#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
Nathan Scotte718eeb42005-11-02 15:09:22 +1100186#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 operations, typically for
188 disk errors in metadata */
Christoph Hellwige84661a2011-05-20 13:45:32 +0000189#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100190#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 allocations */
Nathan Scott13059ff2006-01-11 15:32:01 +1100192#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000193#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100194#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100195#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100196#define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 * 32 bits in size */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000198#define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100199#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
200#define XFS_MOUNT_BARRIER (1ULL << 17)
Josef Jeff Sipek1bd960e2008-02-29 13:58:40 +1100201#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
Nathan Scotte718eeb42005-11-02 15:09:22 +1100202#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 * allocation */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000204#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
Nathan Scotte718eeb42005-11-02 15:09:22 +1100205#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
206#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
David Chinnere8c8b3a2005-11-02 10:33:05 +1100207 * I/O size in stat() */
David Chinner2a82b8b2007-07-11 11:09:12 +1000208#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
209 allocator */
Tim Shimmin7c12f292008-04-30 18:15:28 +1000210#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
David Chinnere8c8b3a2005-11-02 10:33:05 +1100211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213/*
214 * Default minimum read and write sizes.
215 */
216#define XFS_READIO_LOG_LARGE 16
217#define XFS_WRITEIO_LOG_LARGE 16
218
219/*
Nathan Scott1f443ad2005-05-05 13:28:29 -0700220 * Max and min values for mount-option defined I/O
221 * preallocation sizes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 */
Nathan Scott1f443ad2005-05-05 13:28:29 -0700223#define XFS_MAX_IO_LOG 30 /* 1G */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224#define XFS_MIN_IO_LOG PAGE_SHIFT
225
226/*
227 * Synchronous read and write sizes. This should be
228 * better for NFSv2 wsync filesystems.
229 */
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200230#define XFS_WSYNC_READIO_LOG 15 /* 32k */
231#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
David Chinnere8c8b3a2005-11-02 10:33:05 +1100233/*
234 * Allow large block sizes to be reported to userspace programs if the
Barry Naujok556b8b12008-04-10 12:22:07 +1000235 * "largeio" mount option is used.
David Chinnere8c8b3a2005-11-02 10:33:05 +1100236 *
237 * If compatibility mode is specified, simply return the basic unit of caching
238 * so that we don't get inefficient read/modify/write I/O from user apps.
239 * Otherwise....
240 *
241 * If the underlying volume is a stripe, then return the stripe width in bytes
242 * as the recommended I/O size. It is not a stripe and we've set a default
243 * buffered I/O size, return that, otherwise return the compat default.
244 */
245static inline unsigned long
246xfs_preferred_iosize(xfs_mount_t *mp)
247{
248 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
249 return PAGE_CACHE_SIZE;
250 return (mp->m_swidth ?
251 (mp->m_swidth << mp->m_sb.sb_blocklog) :
252 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
253 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
254 PAGE_CACHE_SIZE));
255}
256
David Chinner92821e22007-05-24 15:26:31 +1000257#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
258 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
Christoph Hellwig745f6912007-08-30 17:20:39 +1000260void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
261 int lnnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262#define xfs_force_shutdown(m,f) \
Christoph Hellwig745f6912007-08-30 17:20:39 +1000263 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Christoph Hellwig2b5decd2008-11-28 14:23:36 +1100265#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
266#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
267#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
268#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
269#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
270#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 * Flags for xfs_mountfs
274 */
Nathan Scott764d1f82006-03-31 13:04:17 +1000275#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Nathan Scotta844f452005-11-02 14:38:42 +1100277static inline xfs_agnumber_t
278xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279{
Nathan Scotta844f452005-11-02 14:38:42 +1100280 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
281 do_div(ld, mp->m_sb.sb_agblocks);
282 return (xfs_agnumber_t) ld;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
Nathan Scotta844f452005-11-02 14:38:42 +1100285static inline xfs_agblock_t
286xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Nathan Scotta844f452005-11-02 14:38:42 +1100288 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
289 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292/*
David Chinner03135cf2007-02-10 18:35:15 +1100293 * Per-cpu superblock locking functions
294 */
295#ifdef HAVE_PERCPU_SB
Christoph Hellwigb8f82a42009-11-14 16:17:22 +0000296static inline void
David Chinner03135cf2007-02-10 18:35:15 +1100297xfs_icsb_lock(xfs_mount_t *mp)
298{
299 mutex_lock(&mp->m_icsb_mutex);
300}
301
Christoph Hellwigb8f82a42009-11-14 16:17:22 +0000302static inline void
David Chinner03135cf2007-02-10 18:35:15 +1100303xfs_icsb_unlock(xfs_mount_t *mp)
304{
305 mutex_unlock(&mp->m_icsb_mutex);
306}
307#else
308#define xfs_icsb_lock(mp)
309#define xfs_icsb_unlock(mp)
310#endif
311
312/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
David Chinner20f4ebf2007-02-10 18:36:10 +1100314 * xfs_growfs can specify a few fields which are more than int limit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 */
316typedef struct xfs_mod_sb {
317 xfs_sb_field_t msb_field; /* Field to modify, see below */
David Chinner20f4ebf2007-02-10 18:36:10 +1100318 int64_t msb_delta; /* Change to make to specified field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319} xfs_mod_sb_t;
320
Dave Chinner9356fe22013-08-12 20:49:55 +1000321/*
322 * Per-ag incore structure, copies of information in agf and agi, to improve the
Christoph Hellwig4fb6e8a2014-11-28 14:25:04 +1100323 * performance of allocation group selection.
Dave Chinner9356fe22013-08-12 20:49:55 +1000324 */
325typedef struct xfs_perag {
326 struct xfs_mount *pag_mount; /* owner filesystem */
327 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
328 atomic_t pag_ref; /* perag reference count */
329 char pagf_init; /* this agf's entry is initialized */
330 char pagi_init; /* this agi's entry is initialized */
331 char pagf_metadata; /* the agf is preferred to be metadata */
332 char pagi_inodeok; /* The agi is ok for inodes */
333 __uint8_t pagf_levels[XFS_BTNUM_AGF];
334 /* # of levels in bno & cnt btree */
335 __uint32_t pagf_flcount; /* count of blocks in freelist */
336 xfs_extlen_t pagf_freeblks; /* total free blocks */
337 xfs_extlen_t pagf_longest; /* longest free space */
338 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
339 xfs_agino_t pagi_freecount; /* number of free inodes */
340 xfs_agino_t pagi_count; /* number of allocated inodes */
341
342 /*
343 * Inode allocation search lookup optimisation.
344 * If the pagino matches, the search for new inodes
345 * doesn't need to search the near ones again straight away
346 */
347 xfs_agino_t pagl_pagino;
348 xfs_agino_t pagl_leftrec;
349 xfs_agino_t pagl_rightrec;
350 spinlock_t pagb_lock; /* lock for pagb_tree */
351 struct rb_root pagb_tree; /* ordered tree of busy extents */
352
353 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
354
355 spinlock_t pag_ici_lock; /* incore inode cache lock */
356 struct radix_tree_root pag_ici_root; /* incore inode cache root */
357 int pag_ici_reclaimable; /* reclaimable inodes */
358 struct mutex pag_ici_reclaim_lock; /* serialisation point */
359 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
360
361 /* buffer cache index */
362 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */
363 struct rb_root pag_buf_tree; /* ordered tree of active buffers */
364
365 /* for rcu-safe freeing */
366 struct rcu_head rcu_head;
367 int pagb_count; /* pagb slots in use */
368} xfs_perag_t;
369
Chandra Seetharamanadab0f62011-06-29 22:10:14 +0000370extern int xfs_log_sbcount(xfs_mount_t *);
Eric Sandeend5db0f92010-02-05 22:59:53 +0000371extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
Christoph Hellwig42490232008-08-13 16:49:32 +1000372extern int xfs_mountfs(xfs_mount_t *mp);
Dave Chinnerff550682013-08-12 20:49:41 +1000373extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
374 xfs_agnumber_t *maxagi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Christoph Hellwig41b5c2e2008-08-13 16:49:57 +1000376extern void xfs_unmountfs(xfs_mount_t *);
David Chinner20f4ebf2007-02-10 18:36:10 +1100377extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
379 uint, int);
Christoph Hellwig7884bc82009-01-19 02:04:07 +0100380extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
Nathan Scott764d1f82006-03-31 13:04:17 +1000382extern int xfs_readsb(xfs_mount_t *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383extern void xfs_freesb(xfs_mount_t *);
David Chinner92821e22007-05-24 15:26:31 +1000384extern int xfs_fs_writable(xfs_mount_t *);
Nathan Scott4cc929e2007-05-14 18:24:02 +1000385extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Christoph Hellwigd7658d42010-02-17 19:36:13 +0000387extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
388
Dave Chinner055388a2011-01-04 11:35:03 +1100389extern void xfs_set_low_space_thresholds(struct xfs_mount *);
390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391#endif /* __KERNEL__ */
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#endif /* __XFS_MOUNT_H__ */