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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
33
34typedef struct xfs_bmap_free_item
35{
36 xfs_fsblock_t xbfi_startblock;
37 xfs_extlen_t xbfi_blockcount;
38 struct xfs_bmap_free_item *xbfi_next;
39} xfs_bmap_free_item_t;
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54
55typedef struct xfs_bmap_free
56{
57 xfs_bmap_free_item_t *xbf_first;
58 int xbf_count;
59 int xbf_low;
60} xfs_bmap_free_t;
61
62#define XFS_BMAP_MAX_NMAP 4
63
64
65
66
67#define XFS_BMAPI_ENTIRE 0x001
68#define XFS_BMAPI_METADATA 0x002
69#define XFS_BMAPI_ATTRFORK 0x004
70#define XFS_BMAPI_PREALLOC 0x008
71#define XFS_BMAPI_IGSTATE 0x010
72
73#define XFS_BMAPI_CONTIG 0x020
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75
76
77
78
79#define XFS_BMAPI_CONVERT 0x040
80
81#define XFS_BMAPI_FLAGS \
82 { XFS_BMAPI_ENTIRE, "ENTIRE" }, \
83 { XFS_BMAPI_METADATA, "METADATA" }, \
84 { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
85 { XFS_BMAPI_PREALLOC, "PREALLOC" }, \
86 { XFS_BMAPI_IGSTATE, "IGSTATE" }, \
87 { XFS_BMAPI_CONTIG, "CONTIG" }, \
88 { XFS_BMAPI_CONVERT, "CONVERT" }
89
90
91static inline int xfs_bmapi_aflag(int w)
92{
93 return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0);
94}
95
96
97
98
99#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
100#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
101
102static inline void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp)
103{
104 ((flp)->xbf_first = NULL, (flp)->xbf_count = 0, \
105 (flp)->xbf_low = 0, *(fbp) = NULLFSBLOCK);
106}
107
108
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110
111typedef struct xfs_bmalloca {
112 xfs_fsblock_t *firstblock;
113 struct xfs_bmap_free *flist;
114 struct xfs_trans *tp;
115 struct xfs_inode *ip;
116 struct xfs_bmbt_irec prev;
117 struct xfs_bmbt_irec got;
118
119 xfs_fileoff_t offset;
120 xfs_extlen_t length;
121 xfs_fsblock_t blkno;
122
123 struct xfs_btree_cur *cur;
124 xfs_extnum_t idx;
125 int nallocs;
126 int logflags;
127
128 xfs_extlen_t total;
129 xfs_extlen_t minlen;
130 xfs_extlen_t minleft;
131 char eof;
132 char wasdel;
133 char userdata;
134 char aeof;
135 char conv;
136} xfs_bmalloca_t;
137
138
139
140
141#define BMAP_LEFT_CONTIG (1 << 0)
142#define BMAP_RIGHT_CONTIG (1 << 1)
143#define BMAP_LEFT_FILLING (1 << 2)
144#define BMAP_RIGHT_FILLING (1 << 3)
145#define BMAP_LEFT_DELAY (1 << 4)
146#define BMAP_RIGHT_DELAY (1 << 5)
147#define BMAP_LEFT_VALID (1 << 6)
148#define BMAP_RIGHT_VALID (1 << 7)
149#define BMAP_ATTRFORK (1 << 8)
150
151#define XFS_BMAP_EXT_FLAGS \
152 { BMAP_LEFT_CONTIG, "LC" }, \
153 { BMAP_RIGHT_CONTIG, "RC" }, \
154 { BMAP_LEFT_FILLING, "LF" }, \
155 { BMAP_RIGHT_FILLING, "RF" }, \
156 { BMAP_ATTRFORK, "ATTR" }
157
158#if defined(__KERNEL) && defined(DEBUG)
159void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
160 int whichfork, unsigned long caller_ip);
161#define XFS_BMAP_TRACE_EXLIST(ip,c,w) \
162 xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)
163#else
164#define XFS_BMAP_TRACE_EXLIST(ip,c,w)
165#endif
166
167int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
168void xfs_bmap_add_free(xfs_fsblock_t bno, xfs_filblks_t len,
169 struct xfs_bmap_free *flist, struct xfs_mount *mp);
170void xfs_bmap_cancel(struct xfs_bmap_free *flist);
171void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
172int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
173 xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
174int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
175 xfs_fileoff_t *last_block, int whichfork);
176int xfs_bmap_last_offset(struct xfs_trans *tp, struct xfs_inode *ip,
177 xfs_fileoff_t *unused, int whichfork);
178int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
179int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,
180 int whichfork);
181int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
182 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
183 int *nmap, int flags);
184int xfs_bmapi_delay(struct xfs_inode *ip, xfs_fileoff_t bno,
185 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
186 int *nmap, int flags);
187int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
188 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
189 xfs_fsblock_t *firstblock, xfs_extlen_t total,
190 struct xfs_bmbt_irec *mval, int *nmap,
191 struct xfs_bmap_free *flist);
192int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
193 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
194 xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
195 struct xfs_bmap_free *flist, int *done);
196int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
197 xfs_extnum_t num);
198uint xfs_default_attroffset(struct xfs_inode *ip);
199
200#ifdef __KERNEL__
201
202typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
203
204int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
205 int *committed);
206int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
207 xfs_bmap_format_t formatter, void *arg);
208int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
209 int whichfork, int *eof);
210int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
211 int whichfork, int *count);
212int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
213 xfs_fileoff_t start_fsb, xfs_fileoff_t length);
214
215xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
216
217#endif
218
219#endif
220