400 lines
15 KiB
C
400 lines
15 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_MOUNT_H__
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#define __XFS_MOUNT_H__
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typedef struct xfs_trans_reservations {
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uint tr_write; /* extent alloc trans */
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uint tr_itruncate; /* truncate trans */
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uint tr_rename; /* rename trans */
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uint tr_link; /* link trans */
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uint tr_remove; /* unlink trans */
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uint tr_symlink; /* symlink trans */
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uint tr_create; /* create trans */
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uint tr_mkdir; /* mkdir trans */
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uint tr_ifree; /* inode free trans */
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uint tr_ichange; /* inode update trans */
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uint tr_growdata; /* fs data section grow trans */
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uint tr_swrite; /* sync write inode trans */
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uint tr_addafork; /* cvt inode to attributed trans */
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uint tr_writeid; /* write setuid/setgid file */
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uint tr_attrinval; /* attr fork buffer invalidation */
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uint tr_attrsetm; /* set/create an attribute at mount time */
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uint tr_attrsetrt; /* set/create an attribute at runtime */
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uint tr_attrrm; /* remove an attribute */
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uint tr_clearagi; /* clear bad agi unlinked ino bucket */
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uint tr_growrtalloc; /* grow realtime allocations */
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uint tr_growrtzero; /* grow realtime zeroing */
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uint tr_growrtfree; /* grow realtime freeing */
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uint tr_qm_sbchange; /* change quota flags */
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uint tr_qm_setqlim; /* adjust quota limits */
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uint tr_qm_dqalloc; /* allocate quota on disk */
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uint tr_qm_quotaoff; /* turn quota off */
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uint tr_qm_equotaoff;/* end of turn quota off */
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uint tr_sb; /* modify superblock */
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} xfs_trans_reservations_t;
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#ifndef __KERNEL__
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#define xfs_daddr_to_agno(mp,d) \
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((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
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#define xfs_daddr_to_agbno(mp,d) \
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((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
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#else /* __KERNEL__ */
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struct xlog;
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struct xfs_inode;
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struct xfs_mru_cache;
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struct xfs_nameops;
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struct xfs_ail;
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struct xfs_quotainfo;
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#ifdef HAVE_PERCPU_SB
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/*
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* Valid per-cpu incore superblock counters. Note that if you add new counters,
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* you may need to define new counter disabled bit field descriptors as there
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* are more possible fields in the superblock that can fit in a bitfield on a
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* 32 bit platform. The XFS_SBS_* values for the current current counters just
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* fit.
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*/
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typedef struct xfs_icsb_cnts {
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uint64_t icsb_fdblocks;
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uint64_t icsb_ifree;
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uint64_t icsb_icount;
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unsigned long icsb_flags;
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} xfs_icsb_cnts_t;
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#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
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#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
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extern int xfs_icsb_init_counters(struct xfs_mount *);
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extern void xfs_icsb_reinit_counters(struct xfs_mount *);
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extern void xfs_icsb_destroy_counters(struct xfs_mount *);
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extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
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extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
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extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
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int64_t, int);
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#else
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#define xfs_icsb_init_counters(mp) (0)
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#define xfs_icsb_destroy_counters(mp) do { } while (0)
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#define xfs_icsb_reinit_counters(mp) do { } while (0)
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#define xfs_icsb_sync_counters(mp, flags) do { } while (0)
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#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
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#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
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xfs_mod_incore_sb(mp, field, delta, rsvd)
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#endif
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/* dynamic preallocation free space thresholds, 5% down to 1% */
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enum {
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XFS_LOWSP_1_PCNT = 0,
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XFS_LOWSP_2_PCNT,
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XFS_LOWSP_3_PCNT,
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XFS_LOWSP_4_PCNT,
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XFS_LOWSP_5_PCNT,
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XFS_LOWSP_MAX,
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};
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typedef struct xfs_mount {
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struct super_block *m_super;
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xfs_tid_t m_tid; /* next unused tid for fs */
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struct xfs_ail *m_ail; /* fs active log item list */
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xfs_sb_t m_sb; /* copy of fs superblock */
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spinlock_t m_sb_lock; /* sb counter lock */
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struct xfs_buf *m_sb_bp; /* buffer for superblock */
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char *m_fsname; /* filesystem name */
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int m_fsname_len; /* strlen of fs name */
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char *m_rtname; /* realtime device name */
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char *m_logname; /* external log device name */
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int m_bsize; /* fs logical block size */
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xfs_agnumber_t m_agfrotor; /* last ag where space found */
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xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
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spinlock_t m_agirotor_lock;/* .. and lock protecting it */
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xfs_agnumber_t m_maxagi; /* highest inode alloc group */
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uint m_readio_log; /* min read size log bytes */
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uint m_readio_blocks; /* min read size blocks */
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uint m_writeio_log; /* min write size log bytes */
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uint m_writeio_blocks; /* min write size blocks */
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struct xlog *m_log; /* log specific stuff */
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int m_logbufs; /* number of log buffers */
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int m_logbsize; /* size of each log buffer */
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uint m_rsumlevels; /* rt summary levels */
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uint m_rsumsize; /* size of rt summary, bytes */
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struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
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struct xfs_inode *m_rsumip; /* pointer to summary inode */
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struct xfs_inode *m_rootip; /* pointer to root directory */
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struct xfs_quotainfo *m_quotainfo; /* disk quota information */
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xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
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xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
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xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
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__uint8_t m_blkbit_log; /* blocklog + NBBY */
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__uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
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__uint8_t m_agno_log; /* log #ag's */
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__uint8_t m_agino_log; /* #bits for agino in inum */
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__uint16_t m_inode_cluster_size;/* min inode buf size */
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uint m_blockmask; /* sb_blocksize-1 */
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uint m_blockwsize; /* sb_blocksize in words */
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uint m_blockwmask; /* blockwsize-1 */
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uint m_alloc_mxr[2]; /* max alloc btree records */
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uint m_alloc_mnr[2]; /* min alloc btree records */
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uint m_bmap_dmxr[2]; /* max bmap btree records */
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uint m_bmap_dmnr[2]; /* min bmap btree records */
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uint m_inobt_mxr[2]; /* max inobt btree records */
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uint m_inobt_mnr[2]; /* min inobt btree records */
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uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
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uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
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uint m_in_maxlevels; /* max inobt btree levels. */
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struct radix_tree_root m_perag_tree; /* per-ag accounting info */
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spinlock_t m_perag_lock; /* lock for m_perag_tree */
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struct mutex m_growlock; /* growfs mutex */
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int m_fixedfsid[2]; /* unchanged for life of FS */
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uint m_dmevmask; /* DMI events for this FS */
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__uint64_t m_flags; /* global mount flags */
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uint m_dir_node_ents; /* #entries in a dir danode */
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uint m_attr_node_ents; /* #entries in attr danode */
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int m_ialloc_inos; /* inodes in inode allocation */
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int m_ialloc_blks; /* blocks in inode allocation */
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int m_inoalign_mask;/* mask sb_inoalignmt if used */
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uint m_qflags; /* quota status flags */
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xfs_trans_reservations_t m_reservations;/* precomputed res values */
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__uint64_t m_maxicount; /* maximum inode count */
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__uint64_t m_resblks; /* total reserved blocks */
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__uint64_t m_resblks_avail;/* available reserved blocks */
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__uint64_t m_resblks_save; /* reserved blks @ remount,ro */
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int m_dalign; /* stripe unit */
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int m_swidth; /* stripe width */
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int m_sinoalign; /* stripe unit inode alignment */
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int m_attr_magicpct;/* 37% of the blocksize */
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int m_dir_magicpct; /* 37% of the dir blocksize */
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__uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
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const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
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int m_dirblksize; /* directory block sz--bytes */
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int m_dirblkfsbs; /* directory block sz--fsbs */
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xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */
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xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */
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xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */
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uint m_chsize; /* size of next field */
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atomic_t m_active_trans; /* number trans frozen */
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#ifdef HAVE_PERCPU_SB
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xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
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unsigned long m_icsb_counters; /* disabled per-cpu counters */
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struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
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struct mutex m_icsb_mutex; /* balancer sync lock */
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#endif
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struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
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struct delayed_work m_reclaim_work; /* background inode reclaim */
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struct delayed_work m_eofblocks_work; /* background eof blocks
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trimming */
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__int64_t m_update_flags; /* sb flags we need to update
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on the next remount,rw */
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int64_t m_low_space[XFS_LOWSP_MAX];
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/* low free space thresholds */
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struct workqueue_struct *m_data_workqueue;
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struct workqueue_struct *m_unwritten_workqueue;
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struct workqueue_struct *m_cil_workqueue;
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struct workqueue_struct *m_reclaim_workqueue;
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struct workqueue_struct *m_log_workqueue;
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struct workqueue_struct *m_eofblocks_workqueue;
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} xfs_mount_t;
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/*
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* Flags for m_flags.
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*/
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#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
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must be synchronous except
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for space allocations */
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#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
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#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
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operations, typically for
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disk errors in metadata */
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#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
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#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
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allocations */
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#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
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#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
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#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
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#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
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#define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
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* 32 bits in size */
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#define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
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#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
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#define XFS_MOUNT_BARRIER (1ULL << 17)
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#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
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#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
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* allocation */
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#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
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#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
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#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
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* I/O size in stat() */
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#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
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allocator */
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#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
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/*
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* Default minimum read and write sizes.
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*/
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#define XFS_READIO_LOG_LARGE 16
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#define XFS_WRITEIO_LOG_LARGE 16
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/*
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* Max and min values for mount-option defined I/O
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* preallocation sizes.
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*/
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#define XFS_MAX_IO_LOG 30 /* 1G */
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#define XFS_MIN_IO_LOG PAGE_SHIFT
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/*
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* Synchronous read and write sizes. This should be
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* better for NFSv2 wsync filesystems.
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*/
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#define XFS_WSYNC_READIO_LOG 15 /* 32k */
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#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
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/*
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* Allow large block sizes to be reported to userspace programs if the
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* "largeio" mount option is used.
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*
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* If compatibility mode is specified, simply return the basic unit of caching
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* so that we don't get inefficient read/modify/write I/O from user apps.
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* Otherwise....
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*
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* If the underlying volume is a stripe, then return the stripe width in bytes
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* as the recommended I/O size. It is not a stripe and we've set a default
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* buffered I/O size, return that, otherwise return the compat default.
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*/
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static inline unsigned long
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xfs_preferred_iosize(xfs_mount_t *mp)
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{
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if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
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return PAGE_CACHE_SIZE;
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return (mp->m_swidth ?
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(mp->m_swidth << mp->m_sb.sb_blocklog) :
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((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
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(1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
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PAGE_CACHE_SIZE));
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}
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#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
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((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
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#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
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void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
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int lnnum);
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#define xfs_force_shutdown(m,f) \
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xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
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#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
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#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
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#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
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#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
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#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
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#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
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/*
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* Flags for xfs_mountfs
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*/
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#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
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static inline xfs_agnumber_t
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xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
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{
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xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
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do_div(ld, mp->m_sb.sb_agblocks);
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return (xfs_agnumber_t) ld;
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}
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static inline xfs_agblock_t
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xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
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{
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xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
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return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
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}
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/*
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* perag get/put wrappers for ref counting
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*/
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struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
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struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
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int tag);
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void xfs_perag_put(struct xfs_perag *pag);
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/*
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* Per-cpu superblock locking functions
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*/
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#ifdef HAVE_PERCPU_SB
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static inline void
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xfs_icsb_lock(xfs_mount_t *mp)
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{
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mutex_lock(&mp->m_icsb_mutex);
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}
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static inline void
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xfs_icsb_unlock(xfs_mount_t *mp)
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{
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mutex_unlock(&mp->m_icsb_mutex);
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}
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#else
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#define xfs_icsb_lock(mp)
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#define xfs_icsb_unlock(mp)
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#endif
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/*
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* This structure is for use by the xfs_mod_incore_sb_batch() routine.
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* xfs_growfs can specify a few fields which are more than int limit
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*/
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typedef struct xfs_mod_sb {
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xfs_sb_field_t msb_field; /* Field to modify, see below */
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int64_t msb_delta; /* Change to make to specified field */
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} xfs_mod_sb_t;
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extern int xfs_log_sbcount(xfs_mount_t *);
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extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
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extern int xfs_mountfs(xfs_mount_t *mp);
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extern void xfs_unmountfs(xfs_mount_t *);
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extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
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extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
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uint, int);
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extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
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extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
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extern int xfs_readsb(xfs_mount_t *, int);
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extern void xfs_freesb(xfs_mount_t *);
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extern int xfs_fs_writable(xfs_mount_t *);
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extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
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extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
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extern void xfs_set_low_space_thresholds(struct xfs_mount *);
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#endif /* __KERNEL__ */
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extern void xfs_sb_calc_crc(struct xfs_buf *);
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extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
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extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
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xfs_agnumber_t *);
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extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
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extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
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extern const struct xfs_buf_ops xfs_sb_buf_ops;
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#endif /* __XFS_MOUNT_H__ */
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