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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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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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77
78
79#define XFS_BMAPI_CONVERT 0x040
80#define XFS_BMAPI_STACK_SWITCH 0x080
81
82#define XFS_BMAPI_FLAGS \
83 { XFS_BMAPI_ENTIRE, "ENTIRE" }, \
84 { XFS_BMAPI_METADATA, "METADATA" }, \
85 { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
86 { XFS_BMAPI_PREALLOC, "PREALLOC" }, \
87 { XFS_BMAPI_IGSTATE, "IGSTATE" }, \
88 { XFS_BMAPI_CONTIG, "CONTIG" }, \
89 { XFS_BMAPI_CONVERT, "CONVERT" }, \
90 { XFS_BMAPI_STACK_SWITCH, "STACK_SWITCH" }
91
92
93static inline int xfs_bmapi_aflag(int w)
94{
95 return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0);
96}
97
98
99
100
101#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
102#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
103
104static inline void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp)
105{
106 ((flp)->xbf_first = NULL, (flp)->xbf_count = 0, \
107 (flp)->xbf_low = 0, *(fbp) = NULLFSBLOCK);
108}
109
110
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112
113typedef struct xfs_bmalloca {
114 xfs_fsblock_t *firstblock;
115 struct xfs_bmap_free *flist;
116 struct xfs_trans *tp;
117 struct xfs_inode *ip;
118 struct xfs_bmbt_irec prev;
119 struct xfs_bmbt_irec got;
120
121 xfs_fileoff_t offset;
122 xfs_extlen_t length;
123 xfs_fsblock_t blkno;
124
125 struct xfs_btree_cur *cur;
126 xfs_extnum_t idx;
127 int nallocs;
128 int logflags;
129
130 xfs_extlen_t total;
131 xfs_extlen_t minlen;
132 xfs_extlen_t minleft;
133 char eof;
134 char wasdel;
135 char userdata;
136 char aeof;
137 char conv;
138 char stack_switch;
139 int flags;
140 struct completion *done;
141 struct work_struct work;
142 int result;
143} xfs_bmalloca_t;
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145
146
147
148#define BMAP_LEFT_CONTIG (1 << 0)
149#define BMAP_RIGHT_CONTIG (1 << 1)
150#define BMAP_LEFT_FILLING (1 << 2)
151#define BMAP_RIGHT_FILLING (1 << 3)
152#define BMAP_LEFT_DELAY (1 << 4)
153#define BMAP_RIGHT_DELAY (1 << 5)
154#define BMAP_LEFT_VALID (1 << 6)
155#define BMAP_RIGHT_VALID (1 << 7)
156#define BMAP_ATTRFORK (1 << 8)
157
158#define XFS_BMAP_EXT_FLAGS \
159 { BMAP_LEFT_CONTIG, "LC" }, \
160 { BMAP_RIGHT_CONTIG, "RC" }, \
161 { BMAP_LEFT_FILLING, "LF" }, \
162 { BMAP_RIGHT_FILLING, "RF" }, \
163 { BMAP_ATTRFORK, "ATTR" }
164
165#if defined(__KERNEL) && defined(DEBUG)
166void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
167 int whichfork, unsigned long caller_ip);
168#define XFS_BMAP_TRACE_EXLIST(ip,c,w) \
169 xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)
170#else
171#define XFS_BMAP_TRACE_EXLIST(ip,c,w)
172#endif
173
174int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
175void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
176void xfs_bmap_add_free(xfs_fsblock_t bno, xfs_filblks_t len,
177 struct xfs_bmap_free *flist, struct xfs_mount *mp);
178void xfs_bmap_cancel(struct xfs_bmap_free *flist);
179void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
180int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
181 xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
182int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
183 xfs_fileoff_t *last_block, int whichfork);
184int xfs_bmap_last_offset(struct xfs_trans *tp, struct xfs_inode *ip,
185 xfs_fileoff_t *unused, int whichfork);
186int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
187int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,
188 int whichfork);
189int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
190 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
191 int *nmap, int flags);
192int xfs_bmapi_delay(struct xfs_inode *ip, xfs_fileoff_t bno,
193 xfs_filblks_t len, struct xfs_bmbt_irec *mval,
194 int *nmap, int flags);
195int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
196 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
197 xfs_fsblock_t *firstblock, xfs_extlen_t total,
198 struct xfs_bmbt_irec *mval, int *nmap,
199 struct xfs_bmap_free *flist);
200int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
201 xfs_fileoff_t bno, xfs_filblks_t len, int flags,
202 xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
203 struct xfs_bmap_free *flist, int *done);
204int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
205 xfs_extnum_t num);
206uint xfs_default_attroffset(struct xfs_inode *ip);
207
208#ifdef __KERNEL__
209
210typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
211
212int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
213 int *committed);
214int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
215 xfs_bmap_format_t formatter, void *arg);
216int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
217 int whichfork, int *eof);
218int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
219 int whichfork, int *count);
220int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
221 xfs_fileoff_t start_fsb, xfs_fileoff_t length);
222
223xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
224
225#endif
226
227#endif
228