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1/*
2 * quota.h for OCFS2
3 *
4 * On disk quota structures for local and global quota file, in-memory
5 * structures.
6 *
7 */
8
9#ifndef _OCFS2_QUOTA_H
10#define _OCFS2_QUOTA_H
11
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/quota.h>
15#include <linux/list.h>
16#include <linux/dqblk_qtree.h>
17
18#include "ocfs2.h"
19
20/*
21 * In-memory structures
22 */
23struct ocfs2_dquot {
24 struct dquot dq_dquot; /* Generic VFS dquot */
25 loff_t dq_local_off; /* Offset in the local quota file */
26 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
27 struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */
28 unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
29 s64 dq_origspace; /* Last globally synced space usage */
30 s64 dq_originodes; /* Last globally synced inode usage */
31 struct llist_node list; /* Member of list of dquots to drop */
32};
33
34/* Description of one chunk to recover in memory */
35struct ocfs2_recovery_chunk {
36 struct list_head rc_list; /* List of chunks */
37 int rc_chunk; /* Chunk number */
38 unsigned long *rc_bitmap; /* Bitmap of entries to recover */
39};
40
41struct ocfs2_quota_recovery {
42 struct list_head r_list[MAXQUOTAS]; /* List of chunks to recover */
43};
44
45/* In-memory structure with quota header information */
46struct ocfs2_mem_dqinfo {
47 unsigned int dqi_type; /* Quota type this structure describes */
48 unsigned int dqi_chunks; /* Number of chunks in local quota file */
49 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
50 unsigned int dqi_syncms; /* How often should we sync with other nodes */
51 struct list_head dqi_chunk; /* List of chunks */
52 struct inode *dqi_gqinode; /* Global quota file inode */
53 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
54 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
55 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
56 u64 dqi_giblk; /* Number of block with global information header */
57 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
58 struct buffer_head *dqi_libh; /* Buffer with local information header */
59 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
60 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
61 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
62 * information, in case we
63 * enable quotas on file
64 * needing it */
65};
66
67static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
68{
69 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
70}
71
72struct ocfs2_quota_chunk {
73 struct list_head qc_chunk; /* List of quotafile chunks */
74 int qc_num; /* Number of quota chunk */
75 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
76};
77
78extern struct kmem_cache *ocfs2_dquot_cachep;
79extern struct kmem_cache *ocfs2_qf_chunk_cachep;
80
81extern struct qtree_fmt_operations ocfs2_global_ops;
82
83struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
84 struct ocfs2_super *osb, int slot_num);
85int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
86 struct ocfs2_quota_recovery *rec,
87 int slot_num);
88void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
89ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
90 size_t len, loff_t off);
91ssize_t ocfs2_quota_write(struct super_block *sb, int type,
92 const char *data, size_t len, loff_t off);
93int ocfs2_global_read_info(struct super_block *sb, int type);
94int ocfs2_global_write_info(struct super_block *sb, int type);
95int ocfs2_global_read_dquot(struct dquot *dquot);
96int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
97static inline int ocfs2_sync_dquot(struct dquot *dquot)
98{
99 return __ocfs2_sync_dquot(dquot, 0);
100}
101static inline int ocfs2_global_release_dquot(struct dquot *dquot)
102{
103 return __ocfs2_sync_dquot(dquot, 1);
104}
105
106int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
107void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
108int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
109int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
110 struct buffer_head **bh);
111int ocfs2_create_local_dquot(struct dquot *dquot);
112int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
113int ocfs2_local_write_dquot(struct dquot *dquot);
114void ocfs2_drop_dquot_refs(struct work_struct *work);
115
116extern const struct dquot_operations ocfs2_quota_operations;
117extern struct quota_format_type ocfs2_quota_format;
118
119#endif /* _OCFS2_QUOTA_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * quota.h for OCFS2
4 *
5 * On disk quota structures for local and global quota file, in-memory
6 * structures.
7 *
8 */
9
10#ifndef _OCFS2_QUOTA_H
11#define _OCFS2_QUOTA_H
12
13#include <linux/types.h>
14#include <linux/slab.h>
15#include <linux/quota.h>
16#include <linux/list.h>
17#include <linux/dqblk_qtree.h>
18
19#include "ocfs2.h"
20
21/* Number of quota types we support */
22#define OCFS2_MAXQUOTAS 2
23
24/*
25 * In-memory structures
26 */
27struct ocfs2_dquot {
28 struct dquot dq_dquot; /* Generic VFS dquot */
29 loff_t dq_local_off; /* Offset in the local quota file */
30 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
31 struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */
32 unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
33 s64 dq_origspace; /* Last globally synced space usage */
34 s64 dq_originodes; /* Last globally synced inode usage */
35 struct llist_node list; /* Member of list of dquots to drop */
36};
37
38/* Description of one chunk to recover in memory */
39struct ocfs2_recovery_chunk {
40 struct list_head rc_list; /* List of chunks */
41 int rc_chunk; /* Chunk number */
42 unsigned long *rc_bitmap; /* Bitmap of entries to recover */
43};
44
45struct ocfs2_quota_recovery {
46 struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */
47};
48
49/* In-memory structure with quota header information */
50struct ocfs2_mem_dqinfo {
51 unsigned int dqi_type; /* Quota type this structure describes */
52 unsigned int dqi_flags; /* Flags OLQF_* */
53 unsigned int dqi_chunks; /* Number of chunks in local quota file */
54 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
55 unsigned int dqi_syncms; /* How often should we sync with other nodes */
56 struct list_head dqi_chunk; /* List of chunks */
57 struct inode *dqi_gqinode; /* Global quota file inode */
58 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
59 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
60 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
61 u64 dqi_giblk; /* Number of block with global information header */
62 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
63 struct buffer_head *dqi_libh; /* Buffer with local information header */
64 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
65 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
66 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
67 * information, in case we
68 * enable quotas on file
69 * needing it */
70};
71
72static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
73{
74 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
75}
76
77struct ocfs2_quota_chunk {
78 struct list_head qc_chunk; /* List of quotafile chunks */
79 int qc_num; /* Number of quota chunk */
80 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
81};
82
83extern struct kmem_cache *ocfs2_dquot_cachep;
84extern struct kmem_cache *ocfs2_qf_chunk_cachep;
85
86extern const struct qtree_fmt_operations ocfs2_global_ops;
87
88struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
89 struct ocfs2_super *osb, int slot_num);
90int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
91 struct ocfs2_quota_recovery *rec,
92 int slot_num);
93void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
94ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
95 size_t len, loff_t off);
96ssize_t ocfs2_quota_write(struct super_block *sb, int type,
97 const char *data, size_t len, loff_t off);
98int ocfs2_global_read_info(struct super_block *sb, int type);
99int ocfs2_global_write_info(struct super_block *sb, int type);
100int ocfs2_global_read_dquot(struct dquot *dquot);
101int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
102static inline int ocfs2_sync_dquot(struct dquot *dquot)
103{
104 return __ocfs2_sync_dquot(dquot, 0);
105}
106static inline int ocfs2_global_release_dquot(struct dquot *dquot)
107{
108 return __ocfs2_sync_dquot(dquot, 1);
109}
110
111int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
112void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
113int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
114int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
115 struct buffer_head **bh);
116int ocfs2_create_local_dquot(struct dquot *dquot);
117int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
118int ocfs2_local_write_dquot(struct dquot *dquot);
119void ocfs2_drop_dquot_refs(struct work_struct *work);
120
121extern const struct dquot_operations ocfs2_quota_operations;
122extern struct quota_format_type ocfs2_quota_format;
123
124#endif /* _OCFS2_QUOTA_H */