1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
7 #ifndef __XFS_MOUNT_H__
8 #define __XFS_MOUNT_H__
13 struct xfs_da_geometry
;
16 * Define a user-level mount structure with all we need
17 * in order to make use of the numerous XFS_* macros.
19 typedef struct xfs_mount
{
20 xfs_sb_t m_sb
; /* copy of fs superblock */
21 #define m_icount m_sb.sb_icount
22 #define m_ifree m_sb.sb_ifree
23 #define m_fdblocks m_sb.sb_fdblocks
24 char *m_fsname
; /* filesystem name */
25 int m_bsize
; /* fs logical block size */
26 xfs_agnumber_t m_agfrotor
; /* last ag where space found */
27 xfs_agnumber_t m_agirotor
; /* last ag dir inode alloced */
28 xfs_agnumber_t m_maxagi
; /* highest inode alloc group */
29 uint m_rsumlevels
; /* rt summary levels */
30 uint m_rsumsize
; /* size of rt summary, bytes */
32 * Optional cache of rt summary level per bitmap block with the
33 * invariant that m_rsum_cache[bbno] <= the minimum i for which
34 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
37 uint8_t *m_rsum_cache
;
38 struct xfs_inode
*m_rbmip
; /* pointer to bitmap inode */
39 struct xfs_inode
*m_rsumip
; /* pointer to summary inode */
40 struct xfs_buftarg
*m_ddev_targp
;
41 struct xfs_buftarg
*m_logdev_targp
;
42 struct xfs_buftarg
*m_rtdev_targp
;
43 #define m_dev m_ddev_targp
44 #define m_logdev m_logdev_targp
45 #define m_rtdev m_rtdev_targp
46 uint8_t m_dircook_elog
; /* log d-cookie entry bits */
47 uint8_t m_blkbit_log
; /* blocklog + NBBY */
48 uint8_t m_blkbb_log
; /* blocklog - BBSHIFT */
49 uint8_t m_sectbb_log
; /* sectorlog - BBSHIFT */
50 uint8_t m_agno_log
; /* log #ag's */
51 uint8_t m_agino_log
; /* #bits for agino in inum */
52 uint m_inode_cluster_size
;/* min inode buf size */
53 unsigned int m_inodes_per_cluster
;
54 unsigned int m_blocks_per_cluster
;
55 unsigned int m_cluster_align
;
56 unsigned int m_cluster_align_inodes
;
57 uint m_blockmask
; /* sb_blocksize-1 */
58 uint m_blockwsize
; /* sb_blocksize in words */
59 uint m_blockwmask
; /* blockwsize-1 */
60 uint m_alloc_mxr
[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
61 uint m_alloc_mnr
[2]; /* XFS_ALLOC_BLOCK_MINRECS */
62 uint m_bmap_dmxr
[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
63 uint m_bmap_dmnr
[2]; /* XFS_BMAP_BLOCK_DMINRECS */
64 uint m_inobt_mxr
[2]; /* XFS_INOBT_BLOCK_MAXRECS */
65 uint m_inobt_mnr
[2]; /* XFS_INOBT_BLOCK_MINRECS */
66 uint m_rmap_mxr
[2]; /* max rmap btree records */
67 uint m_rmap_mnr
[2]; /* min rmap btree records */
68 uint m_refc_mxr
[2]; /* max refc btree records */
69 uint m_refc_mnr
[2]; /* min refc btree records */
70 uint m_ag_maxlevels
; /* XFS_AG_MAXLEVELS */
71 uint m_bm_maxlevels
[2]; /* XFS_BM_MAXLEVELS */
72 uint m_in_maxlevels
; /* XFS_IN_MAXLEVELS */
73 uint m_rmap_maxlevels
; /* max rmap btree levels */
74 uint m_refc_maxlevels
; /* max refc btree levels */
75 xfs_extlen_t m_ag_prealloc_blocks
; /* reserved ag blocks */
76 uint m_alloc_set_aside
; /* space we can't use */
77 uint m_ag_max_usable
; /* max space per AG */
78 struct radix_tree_root m_perag_tree
;
79 uint m_flags
; /* global mount flags */
80 bool m_finobt_nores
; /* no per-AG finobt resv. */
81 uint m_qflags
; /* quota status flags */
82 uint m_attroffset
; /* inode attribute offset */
83 int m_ialloc_inos
; /* inodes in inode allocation */
84 int m_ialloc_blks
; /* blocks in inode allocation */
85 int m_ialloc_min_blks
; /* min blocks in sparse inode
87 int m_litino
; /* size of inode union area */
88 int m_inoalign_mask
;/* mask sb_inoalignmt if used */
89 struct xfs_trans_resv m_resv
; /* precomputed res values */
90 uint64_t m_maxicount
; /* maximum inode count */
91 int m_dalign
; /* stripe unit */
92 int m_swidth
; /* stripe width */
93 int m_sinoalign
; /* stripe unit inode alignmnt */
94 const struct xfs_nameops
*m_dirnameops
; /* vector of dir name ops */
96 struct xfs_da_geometry
*m_dir_geo
; /* directory block geometry */
97 struct xfs_da_geometry
*m_attr_geo
; /* attribute block geometry */
98 const struct xfs_dir_ops
*m_dir_inode_ops
; /* vector of dir inode ops */
99 const struct xfs_dir_ops
*m_nondir_inode_ops
; /* !dir inode ops */
100 #define M_DIROPS(mp) ((mp)->m_dir_inode_ops)
103 * anonymous struct to allow xfs_dquot_buf.c to compile.
104 * Pointer is always null in userspace, so code does not use it at all
111 * xlog is defined in libxlog and thus is not intialized by libxfs. This
112 * allows an application to initialize and store a reference to the log
118 /* per-AG block reservation data structures*/
119 enum xfs_ag_resv_type
{
120 XFS_AG_RESV_NONE
= 0,
122 XFS_AG_RESV_METADATA
,
127 /* number of blocks originally reserved here */
128 xfs_extlen_t ar_orig_reserved
;
129 /* number of blocks reserved here */
130 xfs_extlen_t ar_reserved
;
131 /* number of blocks originally asked for */
132 xfs_extlen_t ar_asked
;
136 * Per-ag incore structure, copies of information in agf and agi,
137 * to improve the performance of allocation group selection.
139 typedef struct xfs_perag
{
140 struct xfs_mount
*pag_mount
; /* owner filesystem */
141 xfs_agnumber_t pag_agno
; /* AG this structure belongs to */
142 atomic_t pag_ref
; /* perag reference count */
143 char pagf_init
; /* this agf's entry is initialized */
144 char pagi_init
; /* this agi's entry is initialized */
145 char pagf_metadata
; /* the agf is preferred to be metadata */
146 char pagi_inodeok
; /* The agi is ok for inodes */
147 uint8_t pagf_levels
[XFS_BTNUM_AGF
];
148 /* # of levels in bno & cnt btree */
149 bool pagf_agflreset
; /* agfl requires reset before use */
150 uint32_t pagf_flcount
; /* count of blocks in freelist */
151 xfs_extlen_t pagf_freeblks
; /* total free blocks */
152 xfs_extlen_t pagf_longest
; /* longest free space */
153 uint32_t pagf_btreeblks
; /* # of blocks held in AGF btrees */
154 xfs_agino_t pagi_freecount
; /* number of free inodes */
155 xfs_agino_t pagi_count
; /* number of allocated inodes */
158 * Inode allocation search lookup optimisation.
159 * If the pagino matches, the search for new inodes
160 * doesn't need to search the near ones again straight away
162 xfs_agino_t pagl_pagino
;
163 xfs_agino_t pagl_leftrec
;
164 xfs_agino_t pagl_rightrec
;
165 int pagb_count
; /* pagb slots in use */
167 /* Blocks reserved for all kinds of metadata. */
168 struct xfs_ag_resv pag_meta_resv
;
169 /* Blocks reserved for just AGFL-based metadata. */
170 struct xfs_ag_resv pag_rmapbt_resv
;
172 /* reference count */
173 uint8_t pagf_refcount_level
;
176 static inline struct xfs_ag_resv
*
178 struct xfs_perag
*pag
,
179 enum xfs_ag_resv_type type
)
182 case XFS_AG_RESV_METADATA
:
183 return &pag
->pag_meta_resv
;
184 case XFS_AG_RESV_RMAPBT
:
185 return &pag
->pag_rmapbt_resv
;
191 #define LIBXFS_MOUNT_DEBUGGER 0x0001
192 #define LIBXFS_MOUNT_32BITINODES 0x0002
193 #define LIBXFS_MOUNT_32BITINOOPT 0x0004
194 #define LIBXFS_MOUNT_COMPAT_ATTR 0x0008
195 #define LIBXFS_MOUNT_ATTR2 0x0010
196 #define LIBXFS_MOUNT_WANT_CORRUPTED 0x0020
198 #define LIBXFS_BHASHSIZE(sbp) (1<<10)
200 extern xfs_mount_t
*libxfs_mount (xfs_mount_t
*, xfs_sb_t
*,
201 dev_t
, dev_t
, dev_t
, int);
202 extern void libxfs_umount (xfs_mount_t
*);
203 extern void libxfs_rtmount_destroy (xfs_mount_t
*);
205 #endif /* __XFS_MOUNT_H__ */