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18#ifndef __XFS_AG_H__
19#define __XFS_AG_H__
20
21
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24
25
26
27struct xfs_buf;
28struct xfs_mount;
29struct xfs_trans;
30
31#define XFS_AGF_MAGIC 0x58414746
32#define XFS_AGI_MAGIC 0x58414749
33#define XFS_AGFL_MAGIC 0x5841464c
34#define XFS_AGF_VERSION 1
35#define XFS_AGI_VERSION 1
36
37#define XFS_AGF_GOOD_VERSION(v) ((v) == XFS_AGF_VERSION)
38#define XFS_AGI_GOOD_VERSION(v) ((v) == XFS_AGI_VERSION)
39
40
41
42
43
44#define XFS_BTNUM_AGF ((int)XFS_BTNUM_CNTi + 1)
45
46
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48
49
50
51
52typedef struct xfs_agf {
53
54
55
56 __be32 agf_magicnum;
57 __be32 agf_versionnum;
58 __be32 agf_seqno;
59 __be32 agf_length;
60
61
62
63 __be32 agf_roots[XFS_BTNUM_AGF];
64 __be32 agf_spare0;
65 __be32 agf_levels[XFS_BTNUM_AGF];
66 __be32 agf_spare1;
67
68 __be32 agf_flfirst;
69 __be32 agf_fllast;
70 __be32 agf_flcount;
71 __be32 agf_freeblks;
72
73 __be32 agf_longest;
74 __be32 agf_btreeblks;
75 uuid_t agf_uuid;
76
77
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80
81
82 __be64 agf_spare64[16];
83
84
85 __be64 agf_lsn;
86 __be32 agf_crc;
87 __be32 agf_spare2;
88
89
90} xfs_agf_t;
91
92#define XFS_AGF_MAGICNUM 0x00000001
93#define XFS_AGF_VERSIONNUM 0x00000002
94#define XFS_AGF_SEQNO 0x00000004
95#define XFS_AGF_LENGTH 0x00000008
96#define XFS_AGF_ROOTS 0x00000010
97#define XFS_AGF_LEVELS 0x00000020
98#define XFS_AGF_FLFIRST 0x00000040
99#define XFS_AGF_FLLAST 0x00000080
100#define XFS_AGF_FLCOUNT 0x00000100
101#define XFS_AGF_FREEBLKS 0x00000200
102#define XFS_AGF_LONGEST 0x00000400
103#define XFS_AGF_BTREEBLKS 0x00000800
104#define XFS_AGF_UUID 0x00001000
105#define XFS_AGF_NUM_BITS 13
106#define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1)
107
108#define XFS_AGF_FLAGS \
109 { XFS_AGF_MAGICNUM, "MAGICNUM" }, \
110 { XFS_AGF_VERSIONNUM, "VERSIONNUM" }, \
111 { XFS_AGF_SEQNO, "SEQNO" }, \
112 { XFS_AGF_LENGTH, "LENGTH" }, \
113 { XFS_AGF_ROOTS, "ROOTS" }, \
114 { XFS_AGF_LEVELS, "LEVELS" }, \
115 { XFS_AGF_FLFIRST, "FLFIRST" }, \
116 { XFS_AGF_FLLAST, "FLLAST" }, \
117 { XFS_AGF_FLCOUNT, "FLCOUNT" }, \
118 { XFS_AGF_FREEBLKS, "FREEBLKS" }, \
119 { XFS_AGF_LONGEST, "LONGEST" }, \
120 { XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \
121 { XFS_AGF_UUID, "UUID" }
122
123
124#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log))
125#define XFS_AGF_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGF_DADDR(mp))
126#define XFS_BUF_TO_AGF(bp) ((xfs_agf_t *)((bp)->b_addr))
127
128extern int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
129 xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
130
131extern const struct xfs_buf_ops xfs_agf_buf_ops;
132
133
134
135
136#define XFS_AGI_UNLINKED_BUCKETS 64
137
138typedef struct xfs_agi {
139
140
141
142 __be32 agi_magicnum;
143 __be32 agi_versionnum;
144 __be32 agi_seqno;
145 __be32 agi_length;
146
147
148
149
150
151 __be32 agi_count;
152 __be32 agi_root;
153 __be32 agi_level;
154 __be32 agi_freecount;
155
156 __be32 agi_newino;
157 __be32 agi_dirino;
158
159
160
161
162 __be32 agi_unlinked[XFS_AGI_UNLINKED_BUCKETS];
163
164 uuid_t agi_uuid;
165 __be32 agi_crc;
166 __be32 agi_pad32;
167 __be64 agi_lsn;
168
169
170} xfs_agi_t;
171
172#define XFS_AGI_MAGICNUM 0x00000001
173#define XFS_AGI_VERSIONNUM 0x00000002
174#define XFS_AGI_SEQNO 0x00000004
175#define XFS_AGI_LENGTH 0x00000008
176#define XFS_AGI_COUNT 0x00000010
177#define XFS_AGI_ROOT 0x00000020
178#define XFS_AGI_LEVEL 0x00000040
179#define XFS_AGI_FREECOUNT 0x00000080
180#define XFS_AGI_NEWINO 0x00000100
181#define XFS_AGI_DIRINO 0x00000200
182#define XFS_AGI_UNLINKED 0x00000400
183#define XFS_AGI_NUM_BITS 11
184#define XFS_AGI_ALL_BITS ((1 << XFS_AGI_NUM_BITS) - 1)
185
186
187#define XFS_AGI_DADDR(mp) ((xfs_daddr_t)(2 << (mp)->m_sectbb_log))
188#define XFS_AGI_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGI_DADDR(mp))
189#define XFS_BUF_TO_AGI(bp) ((xfs_agi_t *)((bp)->b_addr))
190
191extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
192 xfs_agnumber_t agno, struct xfs_buf **bpp);
193
194extern const struct xfs_buf_ops xfs_agi_buf_ops;
195
196
197
198
199
200#define XFS_AGFL_DADDR(mp) ((xfs_daddr_t)(3 << (mp)->m_sectbb_log))
201#define XFS_AGFL_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGFL_DADDR(mp))
202#define XFS_BUF_TO_AGFL(bp) ((xfs_agfl_t *)((bp)->b_addr))
203
204#define XFS_BUF_TO_AGFL_BNO(mp, bp) \
205 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
206 &(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
207 (__be32 *)(bp)->b_addr)
208
209
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211
212
213
214#define XFS_AGFL_SIZE(mp) \
215 (((mp)->m_sb.sb_sectsize - \
216 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
217 sizeof(struct xfs_agfl) : 0)) / \
218 sizeof(xfs_agblock_t))
219
220typedef struct xfs_agfl {
221 __be32 agfl_magicnum;
222 __be32 agfl_seqno;
223 uuid_t agfl_uuid;
224 __be64 agfl_lsn;
225 __be32 agfl_crc;
226 __be32 agfl_bno[];
227} xfs_agfl_t;
228
229
230
231
232
233#define XFS_PAGB_NUM_SLOTS 128
234
235typedef struct xfs_perag {
236 struct xfs_mount *pag_mount;
237 xfs_agnumber_t pag_agno;
238 atomic_t pag_ref;
239 char pagf_init;
240 char pagi_init;
241 char pagf_metadata;
242 char pagi_inodeok;
243 __uint8_t pagf_levels[XFS_BTNUM_AGF];
244
245 __uint32_t pagf_flcount;
246 xfs_extlen_t pagf_freeblks;
247 xfs_extlen_t pagf_longest;
248 __uint32_t pagf_btreeblks;
249 xfs_agino_t pagi_freecount;
250 xfs_agino_t pagi_count;
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256
257 xfs_agino_t pagl_pagino;
258 xfs_agino_t pagl_leftrec;
259 xfs_agino_t pagl_rightrec;
260#ifdef __KERNEL__
261 spinlock_t pagb_lock;
262 struct rb_root pagb_tree;
263
264 atomic_t pagf_fstrms;
265
266 spinlock_t pag_ici_lock;
267 struct radix_tree_root pag_ici_root;
268 int pag_ici_reclaimable;
269 struct mutex pag_ici_reclaim_lock;
270 unsigned long pag_ici_reclaim_cursor;
271
272
273 spinlock_t pag_buf_lock;
274 struct rb_root pag_buf_tree;
275
276
277 struct rcu_head rcu_head;
278#endif
279 int pagb_count;
280} xfs_perag_t;
281
282
283
284
285#define XFS_ICI_NO_TAG (-1)
286
287#define XFS_ICI_RECLAIM_TAG 0
288#define XFS_ICI_EOFBLOCKS_TAG 1
289
290#define XFS_AG_MAXLEVELS(mp) ((mp)->m_ag_maxlevels)
291#define XFS_MIN_FREELIST_RAW(bl,cl,mp) \
292 (MIN(bl + 1, XFS_AG_MAXLEVELS(mp)) + MIN(cl + 1, XFS_AG_MAXLEVELS(mp)))
293#define XFS_MIN_FREELIST(a,mp) \
294 (XFS_MIN_FREELIST_RAW( \
295 be32_to_cpu((a)->agf_levels[XFS_BTNUM_BNOi]), \
296 be32_to_cpu((a)->agf_levels[XFS_BTNUM_CNTi]), mp))
297#define XFS_MIN_FREELIST_PAG(pag,mp) \
298 (XFS_MIN_FREELIST_RAW( \
299 (unsigned int)(pag)->pagf_levels[XFS_BTNUM_BNOi], \
300 (unsigned int)(pag)->pagf_levels[XFS_BTNUM_CNTi], mp))
301
302#define XFS_AGB_TO_FSB(mp,agno,agbno) \
303 (((xfs_fsblock_t)(agno) << (mp)->m_sb.sb_agblklog) | (agbno))
304#define XFS_FSB_TO_AGNO(mp,fsbno) \
305 ((xfs_agnumber_t)((fsbno) >> (mp)->m_sb.sb_agblklog))
306#define XFS_FSB_TO_AGBNO(mp,fsbno) \
307 ((xfs_agblock_t)((fsbno) & xfs_mask32lo((mp)->m_sb.sb_agblklog)))
308#define XFS_AGB_TO_DADDR(mp,agno,agbno) \
309 ((xfs_daddr_t)XFS_FSB_TO_BB(mp, \
310 (xfs_fsblock_t)(agno) * (mp)->m_sb.sb_agblocks + (agbno)))
311#define XFS_AG_DADDR(mp,agno,d) (XFS_AGB_TO_DADDR(mp, agno, 0) + (d))
312
313
314
315
316
317#define XFS_AG_CHECK_DADDR(mp,d,len) \
318 ((len) == 1 ? \
319 ASSERT((d) == XFS_SB_DADDR || \
320 xfs_daddr_to_agbno(mp, d) != XFS_SB_DADDR) : \
321 ASSERT(xfs_daddr_to_agno(mp, d) == \
322 xfs_daddr_to_agno(mp, (d) + (len) - 1)))
323
324#endif
325