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/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_MOUNT_H__
#define __XFS_MOUNT_H__
struct xfs_inode;
struct xfs_buftarg;
struct xfs_dir_ops;
struct xfs_da_geometry;
/*
* Define a user-level mount structure with all we need
* in order to make use of the numerous XFS_* macros.
*/
typedef struct xfs_mount {
xfs_sb_t m_sb; /* copy of fs superblock */
#define m_icount m_sb.sb_icount
#define m_ifree m_sb.sb_ifree
#define m_fdblocks m_sb.sb_fdblocks
char *m_fsname; /* filesystem name */
int m_bsize; /* fs logical block size */
xfs_agnumber_t m_agfrotor; /* last ag where space found */
xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
xfs_agnumber_t m_maxagi; /* highest inode alloc group */
uint m_rsumlevels; /* rt summary levels */
uint m_rsumsize; /* size of rt summary, bytes */
struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
struct xfs_inode *m_rsumip; /* pointer to summary inode */
struct xfs_buftarg *m_ddev_targp;
struct xfs_buftarg *m_logdev_targp;
struct xfs_buftarg *m_rtdev_targp;
#define m_dev m_ddev_targp
#define m_logdev m_logdev_targp
#define m_rtdev m_rtdev_targp
__uint8_t m_dircook_elog; /* log d-cookie entry bits */
__uint8_t m_blkbit_log; /* blocklog + NBBY */
__uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
__uint8_t m_sectbb_log; /* sectorlog - BBSHIFT */
__uint8_t m_agno_log; /* log #ag's */
__uint8_t m_agino_log; /* #bits for agino in inum */
uint m_inode_cluster_size;/* min inode buf size */
uint m_blockmask; /* sb_blocksize-1 */
uint m_blockwsize; /* sb_blocksize in words */
uint m_blockwmask; /* blockwsize-1 */
uint m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
uint m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
uint m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
uint m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
uint m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
uint m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
uint m_rmap_mxr[2]; /* max rmap btree records */
uint m_rmap_mnr[2]; /* min rmap btree records */
uint m_refc_mxr[2]; /* max refc btree records */
uint m_refc_mnr[2]; /* min refc btree records */
uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
uint m_in_maxlevels; /* XFS_IN_MAXLEVELS */
uint m_rmap_maxlevels; /* max rmap btree levels */
uint m_refc_maxlevels; /* max refc btree levels */
xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
uint m_alloc_set_aside; /* space we can't use */
uint m_ag_max_usable; /* max space per AG */
struct radix_tree_root m_perag_tree;
uint m_flags; /* global mount flags */
bool m_inotbt_nores; /* no per-AG finobt resv. */
uint m_qflags; /* quota status flags */
uint m_attroffset; /* inode attribute offset */
int m_ialloc_inos; /* inodes in inode allocation */
int m_ialloc_blks; /* blocks in inode allocation */
int m_ialloc_min_blks; /* min blocks in sparse inode
* allocation */
int m_litino; /* size of inode union area */
int m_inoalign_mask;/* mask sb_inoalignmt if used */
struct xfs_trans_resv m_resv; /* precomputed res values */
__uint64_t m_maxicount; /* maximum inode count */
int m_dalign; /* stripe unit */
int m_swidth; /* stripe width */
int m_sinoalign; /* stripe unit inode alignmnt */
const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
#define M_DIROPS(mp) ((mp)->m_dir_inode_ops)
/*
* anonymous struct to allow xfs_dquot_buf.c to compile.
* Pointer is always null in userspace, so code does not use it at all
*/
struct {
int qi_dqperchunk;
} *m_quotainfo;
/*
* xlog is defined in libxlog and thus is not intialized by libxfs. This
* allows an application to initialize and store a reference to the log
* if warranted.
*/
struct xlog *m_log;
} xfs_mount_t;
/* per-AG block reservation data structures*/
enum xfs_ag_resv_type {
XFS_AG_RESV_NONE = 0,
XFS_AG_RESV_METADATA,
XFS_AG_RESV_AGFL,
};
struct xfs_ag_resv {
/* number of blocks originally reserved here */
xfs_extlen_t ar_orig_reserved;
/* number of blocks reserved here */
xfs_extlen_t ar_reserved;
/* number of blocks originally asked for */
xfs_extlen_t ar_asked;
};
/*
* Per-ag incore structure, copies of information in agf and agi,
* to improve the performance of allocation group selection.
*/
typedef struct xfs_perag {
struct xfs_mount *pag_mount; /* owner filesystem */
xfs_agnumber_t pag_agno; /* AG this structure belongs to */
atomic_t pag_ref; /* perag reference count */
char pagf_init; /* this agf's entry is initialized */
char pagi_init; /* this agi's entry is initialized */
char pagf_metadata; /* the agf is preferred to be metadata */
char pagi_inodeok; /* The agi is ok for inodes */
__uint8_t pagf_levels[XFS_BTNUM_AGF];
/* # of levels in bno & cnt btree */
__uint32_t pagf_flcount; /* count of blocks in freelist */
xfs_extlen_t pagf_freeblks; /* total free blocks */
xfs_extlen_t pagf_longest; /* longest free space */
__uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
xfs_agino_t pagi_freecount; /* number of free inodes */
xfs_agino_t pagi_count; /* number of allocated inodes */
/*
* Inode allocation search lookup optimisation.
* If the pagino matches, the search for new inodes
* doesn't need to search the near ones again straight away
*/
xfs_agino_t pagl_pagino;
xfs_agino_t pagl_leftrec;
xfs_agino_t pagl_rightrec;
int pagb_count; /* pagb slots in use */
/* Blocks reserved for all kinds of metadata. */
struct xfs_ag_resv pag_meta_resv;
/* Blocks reserved for just AGFL-based metadata. */
struct xfs_ag_resv pag_agfl_resv;
/* reference count */
__uint8_t pagf_refcount_level;
} xfs_perag_t;
static inline struct xfs_ag_resv *
xfs_perag_resv(
struct xfs_perag *pag,
enum xfs_ag_resv_type type)
{
switch (type) {
case XFS_AG_RESV_METADATA:
return &pag->pag_meta_resv;
case XFS_AG_RESV_AGFL:
return &pag->pag_agfl_resv;
default:
return NULL;
}
}
#define LIBXFS_MOUNT_DEBUGGER 0x0001
#define LIBXFS_MOUNT_32BITINODES 0x0002
#define LIBXFS_MOUNT_32BITINOOPT 0x0004
#define LIBXFS_MOUNT_COMPAT_ATTR 0x0008
#define LIBXFS_MOUNT_ATTR2 0x0010
#define LIBXFS_MOUNT_WANT_CORRUPTED 0x0020
#define LIBXFS_BHASHSIZE(sbp) (1<<10)
extern xfs_mount_t *libxfs_mount (xfs_mount_t *, xfs_sb_t *,
dev_t, dev_t, dev_t, int);
extern void libxfs_umount (xfs_mount_t *);
extern void libxfs_rtmount_destroy (xfs_mount_t *);
#endif /* __XFS_MOUNT_H__ */