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18#ifndef __XFS_BMAP_H__
19#define __XFS_BMAP_H__
20
21struct getbmap;
22struct xfs_bmbt_irec;
23struct xfs_ifork;
24struct xfs_inode;
25struct xfs_mount;
26struct xfs_trans;
27
28extern kmem_zone_t *xfs_bmap_free_item_zone;
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32
33struct xfs_bmalloca {
34 xfs_fsblock_t *firstblock;
35 struct xfs_bmap_free *flist;
36 struct xfs_trans *tp;
37 struct xfs_inode *ip;
38 struct xfs_bmbt_irec prev;
39 struct xfs_bmbt_irec got;
40
41 xfs_fileoff_t offset;
42 xfs_extlen_t length;
43 xfs_fsblock_t blkno;
44
45 struct xfs_btree_cur *cur;
46 xfs_extnum_t idx;
47 int nallocs;
48 int logflags;
49
50 xfs_extlen_t total;
51 xfs_extlen_t minlen;
52 xfs_extlen_t minleft;
53 bool eof;
54 bool wasdel;
55 bool userdata;
56 bool aeof;
57 bool conv;
58 int flags;
59};
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64
65typedef struct xfs_bmap_free_item
66{
67 xfs_fsblock_t xbfi_startblock;
68 xfs_extlen_t xbfi_blockcount;
69 struct xfs_bmap_free_item *xbfi_next;
70} xfs_bmap_free_item_t;
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86typedef struct xfs_bmap_free
87{
88 xfs_bmap_free_item_t *xbf_first;
89 int xbf_count;
90 int xbf_low;
91} xfs_bmap_free_t;
92
93#define XFS_BMAP_MAX_NMAP 4
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97
98#define XFS_BMAPI_ENTIRE 0x001
99#define XFS_BMAPI_METADATA 0x002
100#define XFS_BMAPI_ATTRFORK 0x004
101#define XFS_BMAPI_PREALLOC 0x008
102#define XFS_BMAPI_IGSTATE 0x010
103
104#define XFS_BMAPI_CONTIG 0x020
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109
110#define XFS_BMAPI_CONVERT 0x040
111
112#define XFS_BMAPI_FLAGS \
113 { XFS_BMAPI_ENTIRE, "ENTIRE" }, \
114 { XFS_BMAPI_METADATA, "METADATA" }, \
115 { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
116 { XFS_BMAPI_PREALLOC, "PREALLOC" }, \
117 { XFS_BMAPI_IGSTATE, "IGSTATE" }, \
118 { XFS_BMAPI_CONTIG, "CONTIG" }, \
119 { XFS_BMAPI_CONVERT, "CONVERT" }
120
121
122static inline int xfs_bmapi_aflag(int w)
123{
124 return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0);
125}
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129
130#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
131#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
132
133static inline void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp)
134{
135 ((flp)->xbf_first = NULL, (flp)->xbf_count = 0, \
136 (flp)->xbf_low = 0, *(fbp) = NULLFSBLOCK);
137}
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141
142#define BMAP_LEFT_CONTIG (1 << 0)
143#define BMAP_RIGHT_CONTIG (1 << 1)
144#define BMAP_LEFT_FILLING (1 << 2)
145#define BMAP_RIGHT_FILLING (1 << 3)
146#define BMAP_LEFT_DELAY (1 << 4)
147#define BMAP_RIGHT_DELAY (1 << 5)
148#define BMAP_LEFT_VALID (1 << 6)
149#define BMAP_RIGHT_VALID (1 << 7)
150#define BMAP_ATTRFORK (1 << 8)
151
152#define XFS_BMAP_EXT_FLAGS \
153 { BMAP_LEFT_CONTIG, "LC" }, \
154 { BMAP_RIGHT_CONTIG, "RC" }, \
155 { BMAP_LEFT_FILLING, "LF" }, \
156 { BMAP_RIGHT_FILLING, "RF" }, \
157 { BMAP_ATTRFORK, "ATTR" }
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166
167#define XFS_BMAP_MAX_SHIFT_EXTENTS 1
168
169enum shift_direction {
170 SHIFT_LEFT = 0,
171 SHIFT_RIGHT,
172};
173
174#ifdef DEBUG
175void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
176 int whichfork, unsigned long caller_ip);
177#define XFS_BMAP_TRACE_EXLIST(ip,c,w) \
178 xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)
179#else
180#define XFS_BMAP_TRACE_EXLIST(ip,c,w)
181#endif
182
183int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
184void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
185void xfs_bmap_add_free(xfs_fsblock_t bno, xfs_filblks_t len,
186 struct xfs_bmap_free *flist, struct xfs_mount *mp);
187void xfs_bmap_cancel(struct xfs_bmap_free *flist);
188int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
189 int *committed);
190void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
191int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
192 xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
193int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
194 xfs_fileoff_t *last_block, int whichfork);
195int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused,
196 int whichfork);
197int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
198int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,
199 int whichfork);
200int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
201 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
202 int *nmap, int flags);
203int xfs_bmapi_delay(struct xfs_inode *ip, xfs_fileoff_t bno,
204 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
205 int *nmap, int flags);
206int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
207 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
208 xfs_fsblock_t *firstblock, xfs_extlen_t total,
209 struct xfs_bmbt_irec *mval, int *nmap,
210 struct xfs_bmap_free *flist);
211int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
212 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
213 xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
214 struct xfs_bmap_free *flist, int *done);
215int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
216 xfs_extnum_t num);
217uint xfs_default_attroffset(struct xfs_inode *ip);
218int xfs_bmap_shift_extents(struct xfs_trans *tp, struct xfs_inode *ip,
219 xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
220 int *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
221 struct xfs_bmap_free *flist, enum shift_direction direction,
222 int num_exts);
223int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
224
225#endif
226