diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-09-11 08:46:53 -0400 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-09-11 08:46:53 -0400 |
commit | 336879b1da97fffc097f77c6d6f818660f2826f0 (patch) | |
tree | 4ddb4d1c5d2b67fb096c72e41d2a03b01a605041 /fs/xfs/libxfs/xfs_inode_fork.h | |
parent | 3d3cbd84300e7be1e53083cac0f6f9c12978ecb4 (diff) | |
parent | fdcaa1dbb7c6ed419b10fb8cdb5001ab0a00538f (diff) |
Merge remote-tracking branch 'airlied/drm-next' into topic/vblank-rework
Dave asked me to do the backmerge before sending him the revised pull
request, so here we go. Nothing fancy in the conflicts, just a few
things changed right next to each another.
Conflicts:
drivers/gpu/drm/drm_irq.c
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_inode_fork.h')
-rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h new file mode 100644 index 000000000000..7d3b1ed6dcbe --- /dev/null +++ b/fs/xfs/libxfs/xfs_inode_fork.h | |||
@@ -0,0 +1,171 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. | ||
3 | * All Rights Reserved. | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU General Public License as | ||
7 | * published by the Free Software Foundation. | ||
8 | * | ||
9 | * 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. | ||
13 | * | ||
14 | * 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 | ||
17 | */ | ||
18 | #ifndef __XFS_INODE_FORK_H__ | ||
19 | #define __XFS_INODE_FORK_H__ | ||
20 | |||
21 | struct xfs_inode_log_item; | ||
22 | struct xfs_dinode; | ||
23 | |||
24 | /* | ||
25 | * The following xfs_ext_irec_t struct introduces a second (top) level | ||
26 | * to the in-core extent allocation scheme. These structs are allocated | ||
27 | * in a contiguous block, creating an indirection array where each entry | ||
28 | * (irec) contains a pointer to a buffer of in-core extent records which | ||
29 | * it manages. Each extent buffer is 4k in size, since 4k is the system | ||
30 | * page size on Linux i386 and systems with larger page sizes don't seem | ||
31 | * to gain much, if anything, by using their native page size as the | ||
32 | * extent buffer size. Also, using 4k extent buffers everywhere provides | ||
33 | * a consistent interface for CXFS across different platforms. | ||
34 | * | ||
35 | * There is currently no limit on the number of irec's (extent lists) | ||
36 | * allowed, so heavily fragmented files may require an indirection array | ||
37 | * which spans multiple system pages of memory. The number of extents | ||
38 | * which would require this amount of contiguous memory is very large | ||
39 | * and should not cause problems in the foreseeable future. However, | ||
40 | * if the memory needed for the contiguous array ever becomes a problem, | ||
41 | * it is possible that a third level of indirection may be required. | ||
42 | */ | ||
43 | typedef struct xfs_ext_irec { | ||
44 | xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */ | ||
45 | xfs_extnum_t er_extoff; /* extent offset in file */ | ||
46 | xfs_extnum_t er_extcount; /* number of extents in page/block */ | ||
47 | } xfs_ext_irec_t; | ||
48 | |||
49 | /* | ||
50 | * File incore extent information, present for each of data & attr forks. | ||
51 | */ | ||
52 | #define XFS_IEXT_BUFSZ 4096 | ||
53 | #define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t)) | ||
54 | #define XFS_INLINE_EXTS 2 | ||
55 | #define XFS_INLINE_DATA 32 | ||
56 | typedef struct xfs_ifork { | ||
57 | int if_bytes; /* bytes in if_u1 */ | ||
58 | int if_real_bytes; /* bytes allocated in if_u1 */ | ||
59 | struct xfs_btree_block *if_broot; /* file's incore btree root */ | ||
60 | short if_broot_bytes; /* bytes allocated for root */ | ||
61 | unsigned char if_flags; /* per-fork flags */ | ||
62 | union { | ||
63 | xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */ | ||
64 | xfs_ext_irec_t *if_ext_irec; /* irec map file exts */ | ||
65 | char *if_data; /* inline file data */ | ||
66 | } if_u1; | ||
67 | union { | ||
68 | xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS]; | ||
69 | /* very small file extents */ | ||
70 | char if_inline_data[XFS_INLINE_DATA]; | ||
71 | /* very small file data */ | ||
72 | xfs_dev_t if_rdev; /* dev number if special */ | ||
73 | uuid_t if_uuid; /* mount point value */ | ||
74 | } if_u2; | ||
75 | } xfs_ifork_t; | ||
76 | |||
77 | /* | ||
78 | * Per-fork incore inode flags. | ||
79 | */ | ||
80 | #define XFS_IFINLINE 0x01 /* Inline data is read in */ | ||
81 | #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ | ||
82 | #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ | ||
83 | #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ | ||
84 | |||
85 | /* | ||
86 | * Fork handling. | ||
87 | */ | ||
88 | |||
89 | #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) | ||
90 | #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) | ||
91 | |||
92 | #define XFS_IFORK_PTR(ip,w) \ | ||
93 | ((w) == XFS_DATA_FORK ? \ | ||
94 | &(ip)->i_df : \ | ||
95 | (ip)->i_afp) | ||
96 | #define XFS_IFORK_DSIZE(ip) \ | ||
97 | (XFS_IFORK_Q(ip) ? \ | ||
98 | XFS_IFORK_BOFF(ip) : \ | ||
99 | XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version)) | ||
100 | #define XFS_IFORK_ASIZE(ip) \ | ||
101 | (XFS_IFORK_Q(ip) ? \ | ||
102 | XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version) - \ | ||
103 | XFS_IFORK_BOFF(ip) : \ | ||
104 | 0) | ||
105 | #define XFS_IFORK_SIZE(ip,w) \ | ||
106 | ((w) == XFS_DATA_FORK ? \ | ||
107 | XFS_IFORK_DSIZE(ip) : \ | ||
108 | XFS_IFORK_ASIZE(ip)) | ||
109 | #define XFS_IFORK_FORMAT(ip,w) \ | ||
110 | ((w) == XFS_DATA_FORK ? \ | ||
111 | (ip)->i_d.di_format : \ | ||
112 | (ip)->i_d.di_aformat) | ||
113 | #define XFS_IFORK_FMT_SET(ip,w,n) \ | ||
114 | ((w) == XFS_DATA_FORK ? \ | ||
115 | ((ip)->i_d.di_format = (n)) : \ | ||
116 | ((ip)->i_d.di_aformat = (n))) | ||
117 | #define XFS_IFORK_NEXTENTS(ip,w) \ | ||
118 | ((w) == XFS_DATA_FORK ? \ | ||
119 | (ip)->i_d.di_nextents : \ | ||
120 | (ip)->i_d.di_anextents) | ||
121 | #define XFS_IFORK_NEXT_SET(ip,w,n) \ | ||
122 | ((w) == XFS_DATA_FORK ? \ | ||
123 | ((ip)->i_d.di_nextents = (n)) : \ | ||
124 | ((ip)->i_d.di_anextents = (n))) | ||
125 | #define XFS_IFORK_MAXEXT(ip, w) \ | ||
126 | (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) | ||
127 | |||
128 | int xfs_iformat_fork(struct xfs_inode *, struct xfs_dinode *); | ||
129 | void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, | ||
130 | struct xfs_inode_log_item *, int); | ||
131 | void xfs_idestroy_fork(struct xfs_inode *, int); | ||
132 | void xfs_idata_realloc(struct xfs_inode *, int, int); | ||
133 | void xfs_iroot_realloc(struct xfs_inode *, int, int); | ||
134 | int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); | ||
135 | int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, | ||
136 | int); | ||
137 | |||
138 | struct xfs_bmbt_rec_host * | ||
139 | xfs_iext_get_ext(struct xfs_ifork *, xfs_extnum_t); | ||
140 | void xfs_iext_insert(struct xfs_inode *, xfs_extnum_t, xfs_extnum_t, | ||
141 | struct xfs_bmbt_irec *, int); | ||
142 | void xfs_iext_add(struct xfs_ifork *, xfs_extnum_t, int); | ||
143 | void xfs_iext_add_indirect_multi(struct xfs_ifork *, int, | ||
144 | xfs_extnum_t, int); | ||
145 | void xfs_iext_remove(struct xfs_inode *, xfs_extnum_t, int, int); | ||
146 | void xfs_iext_remove_inline(struct xfs_ifork *, xfs_extnum_t, int); | ||
147 | void xfs_iext_remove_direct(struct xfs_ifork *, xfs_extnum_t, int); | ||
148 | void xfs_iext_remove_indirect(struct xfs_ifork *, xfs_extnum_t, int); | ||
149 | void xfs_iext_realloc_direct(struct xfs_ifork *, int); | ||
150 | void xfs_iext_direct_to_inline(struct xfs_ifork *, xfs_extnum_t); | ||
151 | void xfs_iext_inline_to_direct(struct xfs_ifork *, int); | ||
152 | void xfs_iext_destroy(struct xfs_ifork *); | ||
153 | struct xfs_bmbt_rec_host * | ||
154 | xfs_iext_bno_to_ext(struct xfs_ifork *, xfs_fileoff_t, int *); | ||
155 | struct xfs_ext_irec * | ||
156 | xfs_iext_bno_to_irec(struct xfs_ifork *, xfs_fileoff_t, int *); | ||
157 | struct xfs_ext_irec * | ||
158 | xfs_iext_idx_to_irec(struct xfs_ifork *, xfs_extnum_t *, int *, | ||
159 | int); | ||
160 | void xfs_iext_irec_init(struct xfs_ifork *); | ||
161 | struct xfs_ext_irec * | ||
162 | xfs_iext_irec_new(struct xfs_ifork *, int); | ||
163 | void xfs_iext_irec_remove(struct xfs_ifork *, int); | ||
164 | void xfs_iext_irec_compact(struct xfs_ifork *); | ||
165 | void xfs_iext_irec_compact_pages(struct xfs_ifork *); | ||
166 | void xfs_iext_irec_compact_full(struct xfs_ifork *); | ||
167 | void xfs_iext_irec_update_extoffs(struct xfs_ifork *, int, int); | ||
168 | |||
169 | extern struct kmem_zone *xfs_ifork_zone; | ||
170 | |||
171 | #endif /* __XFS_INODE_FORK_H__ */ | ||