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18#ifndef __XFS_DA_BTREE_H__
19#define __XFS_DA_BTREE_H__
20
21struct xfs_buf;
22struct xfs_bmap_free;
23struct xfs_inode;
24struct xfs_mount;
25struct xfs_trans;
26struct zone;
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37
38#define XFS_DA_NODE_MAGIC 0xfebe
39#define XFS_ATTR_LEAF_MAGIC 0xfbee
40#define XFS_DIR2_LEAF1_MAGIC 0xd2f1
41#define XFS_DIR2_LEAFN_MAGIC 0xd2ff
42
43typedef struct xfs_da_blkinfo {
44 __be32 forw;
45 __be32 back;
46 __be16 magic;
47 __be16 pad;
48} xfs_da_blkinfo_t;
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58
59#define XFS_DA_NODE_MAXDEPTH 5
60
61typedef struct xfs_da_intnode {
62 struct xfs_da_node_hdr {
63 xfs_da_blkinfo_t info;
64 __be16 count;
65 __be16 level;
66 } hdr;
67 struct xfs_da_node_entry {
68 __be32 hashval;
69 __be32 before;
70 } btree[1];
71} xfs_da_intnode_t;
72typedef struct xfs_da_node_hdr xfs_da_node_hdr_t;
73typedef struct xfs_da_node_entry xfs_da_node_entry_t;
74
75#define XFS_LBSIZE(mp) (mp)->m_sb.sb_blocksize
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83
84enum xfs_dacmp {
85 XFS_CMP_DIFFERENT,
86 XFS_CMP_EXACT,
87 XFS_CMP_CASE
88};
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92
93typedef struct xfs_da_args {
94 const __uint8_t *name;
95 int namelen;
96 __uint8_t *value;
97 int valuelen;
98 int flags;
99 xfs_dahash_t hashval;
100 xfs_ino_t inumber;
101 struct xfs_inode *dp;
102 xfs_fsblock_t *firstblock;
103 struct xfs_bmap_free *flist;
104 struct xfs_trans *trans;
105 xfs_extlen_t total;
106 int whichfork;
107 xfs_dablk_t blkno;
108 int index;
109 xfs_dablk_t rmtblkno;
110 int rmtblkcnt;
111 xfs_dablk_t blkno2;
112 int index2;
113 xfs_dablk_t rmtblkno2;
114 int rmtblkcnt2;
115 int op_flags;
116 enum xfs_dacmp cmpresult;
117} xfs_da_args_t;
118
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121
122#define XFS_DA_OP_JUSTCHECK 0x0001
123#define XFS_DA_OP_RENAME 0x0002
124#define XFS_DA_OP_ADDNAME 0x0004
125#define XFS_DA_OP_OKNOENT 0x0008
126#define XFS_DA_OP_CILOOKUP 0x0010
127
128#define XFS_DA_OP_FLAGS \
129 { XFS_DA_OP_JUSTCHECK, "JUSTCHECK" }, \
130 { XFS_DA_OP_RENAME, "RENAME" }, \
131 { XFS_DA_OP_ADDNAME, "ADDNAME" }, \
132 { XFS_DA_OP_OKNOENT, "OKNOENT" }, \
133 { XFS_DA_OP_CILOOKUP, "CILOOKUP" }
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142
143typedef struct xfs_dabuf {
144 int nbuf;
145 short dirty;
146 short bbcount;
147 void *data;
148#ifdef XFS_DABUF_DEBUG
149 inst_t *ra;
150 struct xfs_dabuf *next;
151 struct xfs_dabuf *prev;
152 struct xfs_buftarg *target;
153 xfs_daddr_t blkno;
154#endif
155 struct xfs_buf *bps[1];
156} xfs_dabuf_t;
157#define XFS_DA_BUF_SIZE(n) \
158 (sizeof(xfs_dabuf_t) + sizeof(struct xfs_buf *) * ((n) - 1))
159
160#ifdef XFS_DABUF_DEBUG
161extern xfs_dabuf_t *xfs_dabuf_global_list;
162#endif
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170
171typedef struct xfs_da_state_blk {
172 xfs_dabuf_t *bp;
173 xfs_dablk_t blkno;
174 xfs_daddr_t disk_blkno;
175 int index;
176 xfs_dahash_t hashval;
177 int magic;
178} xfs_da_state_blk_t;
179
180typedef struct xfs_da_state_path {
181 int active;
182 xfs_da_state_blk_t blk[XFS_DA_NODE_MAXDEPTH];
183} xfs_da_state_path_t;
184
185typedef struct xfs_da_state {
186 xfs_da_args_t *args;
187 struct xfs_mount *mp;
188 unsigned int blocksize;
189 unsigned int node_ents;
190 xfs_da_state_path_t path;
191 xfs_da_state_path_t altpath;
192 unsigned char inleaf;
193 unsigned char extravalid;
194 unsigned char extraafter;
195 xfs_da_state_blk_t extrablk;
196
197} xfs_da_state_t;
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201
202#define XFS_DA_LOGOFF(BASE, ADDR) ((char *)(ADDR) - (char *)(BASE))
203#define XFS_DA_LOGRANGE(BASE, ADDR, SIZE) \
204 (uint)(XFS_DA_LOGOFF(BASE, ADDR)), \
205 (uint)(XFS_DA_LOGOFF(BASE, ADDR)+(SIZE)-1)
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209
210struct xfs_nameops {
211 xfs_dahash_t (*hashname)(struct xfs_name *);
212 enum xfs_dacmp (*compname)(struct xfs_da_args *,
213 const unsigned char *, int);
214};
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224int xfs_da_node_create(xfs_da_args_t *args, xfs_dablk_t blkno, int level,
225 xfs_dabuf_t **bpp, int whichfork);
226int xfs_da_split(xfs_da_state_t *state);
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231int xfs_da_join(xfs_da_state_t *state);
232void xfs_da_fixhashpath(xfs_da_state_t *state,
233 xfs_da_state_path_t *path_to_to_fix);
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238int xfs_da_node_lookup_int(xfs_da_state_t *state, int *result);
239int xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
240 int forward, int release, int *result);
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244int xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
245 xfs_da_state_blk_t *new_blk);
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249
250int xfs_da_grow_inode(xfs_da_args_t *args, xfs_dablk_t *new_blkno);
251int xfs_da_get_buf(struct xfs_trans *trans, struct xfs_inode *dp,
252 xfs_dablk_t bno, xfs_daddr_t mappedbno,
253 xfs_dabuf_t **bp, int whichfork);
254int xfs_da_read_buf(struct xfs_trans *trans, struct xfs_inode *dp,
255 xfs_dablk_t bno, xfs_daddr_t mappedbno,
256 xfs_dabuf_t **bpp, int whichfork);
257xfs_daddr_t xfs_da_reada_buf(struct xfs_trans *trans, struct xfs_inode *dp,
258 xfs_dablk_t bno, int whichfork);
259int xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno,
260 xfs_dabuf_t *dead_buf);
261
262uint xfs_da_hashname(const __uint8_t *name_string, int name_length);
263enum xfs_dacmp xfs_da_compname(struct xfs_da_args *args,
264 const unsigned char *name, int len);
265
266
267xfs_da_state_t *xfs_da_state_alloc(void);
268void xfs_da_state_free(xfs_da_state_t *state);
269
270void xfs_da_buf_done(xfs_dabuf_t *dabuf);
271void xfs_da_log_buf(struct xfs_trans *tp, xfs_dabuf_t *dabuf, uint first,
272 uint last);
273void xfs_da_brelse(struct xfs_trans *tp, xfs_dabuf_t *dabuf);
274void xfs_da_binval(struct xfs_trans *tp, xfs_dabuf_t *dabuf);
275xfs_daddr_t xfs_da_blkno(xfs_dabuf_t *dabuf);
276
277extern struct kmem_zone *xfs_da_state_zone;
278extern struct kmem_zone *xfs_dabuf_zone;
279extern const struct xfs_nameops xfs_default_nameops;
280
281#endif
282