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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_ALLOC_H__
7#define __XFS_ALLOC_H__
8
9struct xfs_buf;
10struct xfs_btree_cur;
11struct xfs_mount;
12struct xfs_perag;
13struct xfs_trans;
14
15extern struct workqueue_struct *xfs_alloc_wq;
16
17unsigned int xfs_agfl_size(struct xfs_mount *mp);
18
19/*
20 * Freespace allocation types. Argument to xfs_alloc_[v]extent.
21 */
22#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */
23#define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */
24#define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */
25#define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */
26#define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */
27
28/* this should become an enum again when the tracing code is fixed */
29typedef unsigned int xfs_alloctype_t;
30
31#define XFS_ALLOC_TYPES \
32 { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \
33 { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \
34 { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \
35 { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \
36 { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" }
37
38/*
39 * Flags for xfs_alloc_fix_freelist.
40 */
41#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
42#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
43#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
44#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
45#define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */
46
47/*
48 * Argument structure for xfs_alloc routines.
49 * This is turned into a structure to avoid having 20 arguments passed
50 * down several levels of the stack.
51 */
52typedef struct xfs_alloc_arg {
53 struct xfs_trans *tp; /* transaction pointer */
54 struct xfs_mount *mp; /* file system mount point */
55 struct xfs_buf *agbp; /* buffer for a.g. freelist header */
56 struct xfs_perag *pag; /* per-ag struct for this agno */
57 xfs_fsblock_t fsbno; /* file system block number */
58 xfs_agnumber_t agno; /* allocation group number */
59 xfs_agblock_t agbno; /* allocation group-relative block # */
60 xfs_extlen_t minlen; /* minimum size of extent */
61 xfs_extlen_t maxlen; /* maximum size of extent */
62 xfs_extlen_t mod; /* mod value for extent size */
63 xfs_extlen_t prod; /* prod value for extent size */
64 xfs_extlen_t minleft; /* min blocks must be left after us */
65 xfs_extlen_t total; /* total blocks needed in xaction */
66 xfs_extlen_t alignment; /* align answer to multiple of this */
67 xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */
68 xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */
69 xfs_agblock_t max_agbno; /* ... */
70 xfs_extlen_t len; /* output: actual size of extent */
71 xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */
72 xfs_alloctype_t otype; /* original allocation type */
73 int datatype; /* mask defining data type treatment */
74 char wasdel; /* set if allocation was prev delayed */
75 char wasfromfl; /* set if allocation is from freelist */
76 struct xfs_owner_info oinfo; /* owner of blocks being allocated */
77 enum xfs_ag_resv_type resv; /* block reservation to use */
78#ifdef DEBUG
79 bool alloc_minlen_only; /* allocate exact minlen extent */
80#endif
81} xfs_alloc_arg_t;
82
83/*
84 * Defines for datatype
85 */
86#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
87#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
88#define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */
89
90/* freespace limit calculations */
91#define XFS_ALLOC_AGFL_RESERVE 4
92unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
93unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
94
95xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
96 xfs_extlen_t need, xfs_extlen_t reserved);
97unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
98 struct xfs_perag *pag);
99
100/*
101 * Compute and fill in value of m_ag_maxlevels.
102 */
103void
104xfs_alloc_compute_maxlevels(
105 struct xfs_mount *mp); /* file system mount structure */
106
107/*
108 * Get a block from the freelist.
109 * Returns with the buffer for the block gotten.
110 */
111int /* error */
112xfs_alloc_get_freelist(
113 struct xfs_trans *tp, /* transaction pointer */
114 struct xfs_buf *agbp, /* buffer containing the agf structure */
115 xfs_agblock_t *bnop, /* block address retrieved from freelist */
116 int btreeblk); /* destination is a AGF btree */
117
118/*
119 * Log the given fields from the agf structure.
120 */
121void
122xfs_alloc_log_agf(
123 struct xfs_trans *tp, /* transaction pointer */
124 struct xfs_buf *bp, /* buffer for a.g. freelist header */
125 int fields);/* mask of fields to be logged (XFS_AGF_...) */
126
127/*
128 * Interface for inode allocation to force the pag data to be initialized.
129 */
130int /* error */
131xfs_alloc_pagf_init(
132 struct xfs_mount *mp, /* file system mount structure */
133 struct xfs_trans *tp, /* transaction pointer */
134 xfs_agnumber_t agno, /* allocation group number */
135 int flags); /* XFS_ALLOC_FLAGS_... */
136
137/*
138 * Put the block on the freelist for the allocation group.
139 */
140int /* error */
141xfs_alloc_put_freelist(
142 struct xfs_trans *tp, /* transaction pointer */
143 struct xfs_buf *agbp, /* buffer for a.g. freelist header */
144 struct xfs_buf *agflbp,/* buffer for a.g. free block array */
145 xfs_agblock_t bno, /* block being freed */
146 int btreeblk); /* owner was a AGF btree */
147
148/*
149 * Read in the allocation group header (free/alloc section).
150 */
151int /* error */
152xfs_alloc_read_agf(
153 struct xfs_mount *mp, /* mount point structure */
154 struct xfs_trans *tp, /* transaction pointer */
155 xfs_agnumber_t agno, /* allocation group number */
156 int flags, /* XFS_ALLOC_FLAG_... */
157 struct xfs_buf **bpp); /* buffer for the ag freelist header */
158
159/*
160 * Allocate an extent (variable-size).
161 */
162int /* error */
163xfs_alloc_vextent(
164 xfs_alloc_arg_t *args); /* allocation argument structure */
165
166/*
167 * Free an extent.
168 */
169int /* error */
170__xfs_free_extent(
171 struct xfs_trans *tp, /* transaction pointer */
172 xfs_fsblock_t bno, /* starting block number of extent */
173 xfs_extlen_t len, /* length of extent */
174 const struct xfs_owner_info *oinfo, /* extent owner */
175 enum xfs_ag_resv_type type, /* block reservation type */
176 bool skip_discard);
177
178static inline int
179xfs_free_extent(
180 struct xfs_trans *tp,
181 xfs_fsblock_t bno,
182 xfs_extlen_t len,
183 const struct xfs_owner_info *oinfo,
184 enum xfs_ag_resv_type type)
185{
186 return __xfs_free_extent(tp, bno, len, oinfo, type, false);
187}
188
189int /* error */
190xfs_alloc_lookup_le(
191 struct xfs_btree_cur *cur, /* btree cursor */
192 xfs_agblock_t bno, /* starting block of extent */
193 xfs_extlen_t len, /* length of extent */
194 int *stat); /* success/failure */
195
196int /* error */
197xfs_alloc_lookup_ge(
198 struct xfs_btree_cur *cur, /* btree cursor */
199 xfs_agblock_t bno, /* starting block of extent */
200 xfs_extlen_t len, /* length of extent */
201 int *stat); /* success/failure */
202
203int /* error */
204xfs_alloc_get_rec(
205 struct xfs_btree_cur *cur, /* btree cursor */
206 xfs_agblock_t *bno, /* output: starting block of extent */
207 xfs_extlen_t *len, /* output: length of extent */
208 int *stat); /* output: success/failure */
209
210int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
211 xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
212int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp,
213 xfs_agnumber_t agno, struct xfs_buf **bpp);
214int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
215 struct xfs_buf *, struct xfs_owner_info *);
216int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
217int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag,
218 struct xfs_buf **agbp);
219
220xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
221
222typedef int (*xfs_alloc_query_range_fn)(
223 struct xfs_btree_cur *cur,
224 struct xfs_alloc_rec_incore *rec,
225 void *priv);
226
227int xfs_alloc_query_range(struct xfs_btree_cur *cur,
228 struct xfs_alloc_rec_incore *low_rec,
229 struct xfs_alloc_rec_incore *high_rec,
230 xfs_alloc_query_range_fn fn, void *priv);
231int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
232 void *priv);
233
234int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
235 xfs_extlen_t len, bool *exist);
236
237typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno,
238 void *priv);
239int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf,
240 struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv);
241
242static inline __be32 *
243xfs_buf_to_agfl_bno(
244 struct xfs_buf *bp)
245{
246 if (xfs_sb_version_hascrc(&bp->b_mount->m_sb))
247 return bp->b_addr + sizeof(struct xfs_agfl);
248 return bp->b_addr;
249}
250
251#endif /* __XFS_ALLOC_H__ */
1/*
2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_ALLOC_H__
19#define __XFS_ALLOC_H__
20
21struct xfs_buf;
22struct xfs_btree_cur;
23struct xfs_mount;
24struct xfs_perag;
25struct xfs_trans;
26
27extern struct workqueue_struct *xfs_alloc_wq;
28
29unsigned int xfs_agfl_size(struct xfs_mount *mp);
30
31/*
32 * Freespace allocation types. Argument to xfs_alloc_[v]extent.
33 */
34#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */
35#define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */
36#define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */
37#define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */
38#define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */
39
40/* this should become an enum again when the tracing code is fixed */
41typedef unsigned int xfs_alloctype_t;
42
43#define XFS_ALLOC_TYPES \
44 { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \
45 { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \
46 { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \
47 { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \
48 { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" }
49
50/*
51 * Flags for xfs_alloc_fix_freelist.
52 */
53#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
54#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
55#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
56#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
57#define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */
58
59/*
60 * Argument structure for xfs_alloc routines.
61 * This is turned into a structure to avoid having 20 arguments passed
62 * down several levels of the stack.
63 */
64typedef struct xfs_alloc_arg {
65 struct xfs_trans *tp; /* transaction pointer */
66 struct xfs_mount *mp; /* file system mount point */
67 struct xfs_buf *agbp; /* buffer for a.g. freelist header */
68 struct xfs_perag *pag; /* per-ag struct for this agno */
69 struct xfs_inode *ip; /* for userdata zeroing method */
70 xfs_fsblock_t fsbno; /* file system block number */
71 xfs_agnumber_t agno; /* allocation group number */
72 xfs_agblock_t agbno; /* allocation group-relative block # */
73 xfs_extlen_t minlen; /* minimum size of extent */
74 xfs_extlen_t maxlen; /* maximum size of extent */
75 xfs_extlen_t mod; /* mod value for extent size */
76 xfs_extlen_t prod; /* prod value for extent size */
77 xfs_extlen_t minleft; /* min blocks must be left after us */
78 xfs_extlen_t total; /* total blocks needed in xaction */
79 xfs_extlen_t alignment; /* align answer to multiple of this */
80 xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */
81 xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */
82 xfs_agblock_t max_agbno; /* ... */
83 xfs_extlen_t len; /* output: actual size of extent */
84 xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */
85 xfs_alloctype_t otype; /* original allocation type */
86 int datatype; /* mask defining data type treatment */
87 char wasdel; /* set if allocation was prev delayed */
88 char wasfromfl; /* set if allocation is from freelist */
89 xfs_fsblock_t firstblock; /* io first block allocated */
90 struct xfs_owner_info oinfo; /* owner of blocks being allocated */
91 enum xfs_ag_resv_type resv; /* block reservation to use */
92} xfs_alloc_arg_t;
93
94/*
95 * Defines for datatype
96 */
97#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
98#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
99#define XFS_ALLOC_USERDATA_ZERO (1 << 2)/* zero extent on allocation */
100#define XFS_ALLOC_NOBUSY (1 << 3)/* Busy extents not allowed */
101
102static inline bool
103xfs_alloc_is_userdata(int datatype)
104{
105 return (datatype & ~XFS_ALLOC_NOBUSY) != 0;
106}
107
108static inline bool
109xfs_alloc_allow_busy_reuse(int datatype)
110{
111 return (datatype & XFS_ALLOC_NOBUSY) == 0;
112}
113
114/* freespace limit calculations */
115#define XFS_ALLOC_AGFL_RESERVE 4
116unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
117unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
118
119xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
120 xfs_extlen_t need, xfs_extlen_t reserved);
121unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
122 struct xfs_perag *pag);
123
124/*
125 * Compute and fill in value of m_ag_maxlevels.
126 */
127void
128xfs_alloc_compute_maxlevels(
129 struct xfs_mount *mp); /* file system mount structure */
130
131/*
132 * Get a block from the freelist.
133 * Returns with the buffer for the block gotten.
134 */
135int /* error */
136xfs_alloc_get_freelist(
137 struct xfs_trans *tp, /* transaction pointer */
138 struct xfs_buf *agbp, /* buffer containing the agf structure */
139 xfs_agblock_t *bnop, /* block address retrieved from freelist */
140 int btreeblk); /* destination is a AGF btree */
141
142/*
143 * Log the given fields from the agf structure.
144 */
145void
146xfs_alloc_log_agf(
147 struct xfs_trans *tp, /* transaction pointer */
148 struct xfs_buf *bp, /* buffer for a.g. freelist header */
149 int fields);/* mask of fields to be logged (XFS_AGF_...) */
150
151/*
152 * Interface for inode allocation to force the pag data to be initialized.
153 */
154int /* error */
155xfs_alloc_pagf_init(
156 struct xfs_mount *mp, /* file system mount structure */
157 struct xfs_trans *tp, /* transaction pointer */
158 xfs_agnumber_t agno, /* allocation group number */
159 int flags); /* XFS_ALLOC_FLAGS_... */
160
161/*
162 * Put the block on the freelist for the allocation group.
163 */
164int /* error */
165xfs_alloc_put_freelist(
166 struct xfs_trans *tp, /* transaction pointer */
167 struct xfs_buf *agbp, /* buffer for a.g. freelist header */
168 struct xfs_buf *agflbp,/* buffer for a.g. free block array */
169 xfs_agblock_t bno, /* block being freed */
170 int btreeblk); /* owner was a AGF btree */
171
172/*
173 * Read in the allocation group header (free/alloc section).
174 */
175int /* error */
176xfs_alloc_read_agf(
177 struct xfs_mount *mp, /* mount point structure */
178 struct xfs_trans *tp, /* transaction pointer */
179 xfs_agnumber_t agno, /* allocation group number */
180 int flags, /* XFS_ALLOC_FLAG_... */
181 struct xfs_buf **bpp); /* buffer for the ag freelist header */
182
183/*
184 * Allocate an extent (variable-size).
185 */
186int /* error */
187xfs_alloc_vextent(
188 xfs_alloc_arg_t *args); /* allocation argument structure */
189
190/*
191 * Free an extent.
192 */
193int /* error */
194xfs_free_extent(
195 struct xfs_trans *tp, /* transaction pointer */
196 xfs_fsblock_t bno, /* starting block number of extent */
197 xfs_extlen_t len, /* length of extent */
198 struct xfs_owner_info *oinfo, /* extent owner */
199 enum xfs_ag_resv_type type); /* block reservation type */
200
201int /* error */
202xfs_alloc_lookup_le(
203 struct xfs_btree_cur *cur, /* btree cursor */
204 xfs_agblock_t bno, /* starting block of extent */
205 xfs_extlen_t len, /* length of extent */
206 int *stat); /* success/failure */
207
208int /* error */
209xfs_alloc_lookup_ge(
210 struct xfs_btree_cur *cur, /* btree cursor */
211 xfs_agblock_t bno, /* starting block of extent */
212 xfs_extlen_t len, /* length of extent */
213 int *stat); /* success/failure */
214
215int /* error */
216xfs_alloc_get_rec(
217 struct xfs_btree_cur *cur, /* btree cursor */
218 xfs_agblock_t *bno, /* output: starting block of extent */
219 xfs_extlen_t *len, /* output: length of extent */
220 int *stat); /* output: success/failure */
221
222int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
223 xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
224int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp,
225 xfs_agnumber_t agno, struct xfs_buf **bpp);
226int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
227int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno,
228 struct xfs_buf **agbp);
229
230xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
231
232typedef int (*xfs_alloc_query_range_fn)(
233 struct xfs_btree_cur *cur,
234 struct xfs_alloc_rec_incore *rec,
235 void *priv);
236
237int xfs_alloc_query_range(struct xfs_btree_cur *cur,
238 struct xfs_alloc_rec_incore *low_rec,
239 struct xfs_alloc_rec_incore *high_rec,
240 xfs_alloc_query_range_fn fn, void *priv);
241int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
242 void *priv);
243xfs_agblock_t xfs_ag_block_count(struct xfs_mount *mp, xfs_agnumber_t agno);
244bool xfs_verify_agbno(struct xfs_mount *mp, xfs_agnumber_t agno,
245 xfs_agblock_t agbno);
246bool xfs_verify_fsbno(struct xfs_mount *mp, xfs_fsblock_t fsbno);
247
248int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
249 xfs_extlen_t len, bool *exist);
250
251#endif /* __XFS_ALLOC_H__ */