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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;
29
30
31
32
33struct xfs_bmalloca {
34 xfs_fsblock_t *firstblock;
35 struct xfs_defer_ops *dfops;
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 struct xfs_iext_cursor icur;
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 aeof;
56 bool conv;
57 int datatype;
58 int flags;
59};
60
61
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63
64
65struct xfs_extent_free_item
66{
67 xfs_fsblock_t xefi_startblock;
68 xfs_extlen_t xefi_blockcount;
69 struct list_head xefi_list;
70 struct xfs_owner_info xefi_oinfo;
71};
72
73#define XFS_BMAP_MAX_NMAP 4
74
75
76
77
78#define XFS_BMAPI_ENTIRE 0x001
79#define XFS_BMAPI_METADATA 0x002
80#define XFS_BMAPI_ATTRFORK 0x004
81#define XFS_BMAPI_PREALLOC 0x008
82#define XFS_BMAPI_IGSTATE 0x010
83
84#define XFS_BMAPI_CONTIG 0x020
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88
89
90#define XFS_BMAPI_CONVERT 0x040
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97
98#define XFS_BMAPI_ZERO 0x080
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106
107
108#define XFS_BMAPI_REMAP 0x100
109
110
111#define XFS_BMAPI_COWFORK 0x200
112
113
114#define XFS_BMAPI_DELALLOC 0x400
115
116
117#define XFS_BMAPI_CONVERT_ONLY 0x800
118
119#define XFS_BMAPI_FLAGS \
120 { XFS_BMAPI_ENTIRE, "ENTIRE" }, \
121 { XFS_BMAPI_METADATA, "METADATA" }, \
122 { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
123 { XFS_BMAPI_PREALLOC, "PREALLOC" }, \
124 { XFS_BMAPI_IGSTATE, "IGSTATE" }, \
125 { XFS_BMAPI_CONTIG, "CONTIG" }, \
126 { XFS_BMAPI_CONVERT, "CONVERT" }, \
127 { XFS_BMAPI_ZERO, "ZERO" }, \
128 { XFS_BMAPI_REMAP, "REMAP" }, \
129 { XFS_BMAPI_COWFORK, "COWFORK" }, \
130 { XFS_BMAPI_DELALLOC, "DELALLOC" }, \
131 { XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }
132
133
134static inline int xfs_bmapi_aflag(int w)
135{
136 return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
137 (w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
138}
139
140static inline int xfs_bmapi_whichfork(int bmapi_flags)
141{
142 if (bmapi_flags & XFS_BMAPI_COWFORK)
143 return XFS_COW_FORK;
144 else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
145 return XFS_ATTR_FORK;
146 return XFS_DATA_FORK;
147}
148
149
150
151
152#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
153#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
154
155
156
157
158#define BMAP_LEFT_CONTIG (1 << 0)
159#define BMAP_RIGHT_CONTIG (1 << 1)
160#define BMAP_LEFT_FILLING (1 << 2)
161#define BMAP_RIGHT_FILLING (1 << 3)
162#define BMAP_LEFT_DELAY (1 << 4)
163#define BMAP_RIGHT_DELAY (1 << 5)
164#define BMAP_LEFT_VALID (1 << 6)
165#define BMAP_RIGHT_VALID (1 << 7)
166#define BMAP_ATTRFORK (1 << 8)
167#define BMAP_COWFORK (1 << 9)
168
169#define XFS_BMAP_EXT_FLAGS \
170 { BMAP_LEFT_CONTIG, "LC" }, \
171 { BMAP_RIGHT_CONTIG, "RC" }, \
172 { BMAP_LEFT_FILLING, "LF" }, \
173 { BMAP_RIGHT_FILLING, "RF" }, \
174 { BMAP_ATTRFORK, "ATTR" }, \
175 { BMAP_COWFORK, "COW" }
176
177
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179
180
181
182static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
183{
184 return irec->br_state != XFS_EXT_UNWRITTEN &&
185 irec->br_startblock != HOLESTARTBLOCK &&
186 irec->br_startblock != DELAYSTARTBLOCK &&
187 !isnullstartblock(irec->br_startblock);
188}
189
190void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
191 xfs_filblks_t len);
192void xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);
193int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
194void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
195void xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
196 xfs_fsblock_t bno, xfs_filblks_t len,
197 struct xfs_owner_info *oinfo);
198void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
199int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
200 xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
201int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
202 xfs_fileoff_t *last_block, int whichfork);
203int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused,
204 int whichfork);
205int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
206int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
207 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
208 int *nmap, int flags);
209int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
210 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
211 xfs_fsblock_t *firstblock, xfs_extlen_t total,
212 struct xfs_bmbt_irec *mval, int *nmap,
213 struct xfs_defer_ops *dfops);
214int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
215 xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
216 xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
217 struct xfs_defer_ops *dfops);
218int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
219 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
220 xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
221 struct xfs_defer_ops *dfops, int *done);
222int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
223 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
224 struct xfs_bmbt_irec *del);
225void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
226 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
227 struct xfs_bmbt_irec *del);
228uint xfs_default_attroffset(struct xfs_inode *ip);
229int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip,
230 xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
231 bool *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
232 struct xfs_defer_ops *dfops);
233int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
234 xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
235 bool *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
236 struct xfs_defer_ops *dfops);
237int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
238int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
239 xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
240 struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
241 int eof);
242
243enum xfs_bmap_intent_type {
244 XFS_BMAP_MAP = 1,
245 XFS_BMAP_UNMAP,
246};
247
248struct xfs_bmap_intent {
249 struct list_head bi_list;
250 enum xfs_bmap_intent_type bi_type;
251 struct xfs_inode *bi_owner;
252 int bi_whichfork;
253 struct xfs_bmbt_irec bi_bmap;
254};
255
256int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops,
257 struct xfs_inode *ip, enum xfs_bmap_intent_type type,
258 int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
259 xfs_filblks_t *blockcount, xfs_exntst_t state);
260int xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
261 struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
262int xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
263 struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
264
265static inline int xfs_bmap_fork_to_state(int whichfork)
266{
267 switch (whichfork) {
268 case XFS_ATTR_FORK:
269 return BMAP_ATTRFORK;
270 case XFS_COW_FORK:
271 return BMAP_COWFORK;
272 default:
273 return 0;
274 }
275}
276
277#endif
278