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Jan Kara9e33d692008-08-25 19:56:50 +02001/*
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
Jan Kara9e33d692008-08-25 19:56:50 +020020/*
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 */
Jan Karaf64dd442010-04-28 00:22:30 +020026 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
Jan Kara9e33d692008-08-25 19:56:50 +020027 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};
32
Jan Kara22053632008-10-20 23:50:38 +020033/* Description of one chunk to recover in memory */
34struct ocfs2_recovery_chunk {
35 struct list_head rc_list; /* List of chunks */
36 int rc_chunk; /* Chunk number */
37 unsigned long *rc_bitmap; /* Bitmap of entries to recover */
38};
39
40struct ocfs2_quota_recovery {
41 struct list_head r_list[MAXQUOTAS]; /* List of chunks to recover */
42};
43
Jan Kara9e33d692008-08-25 19:56:50 +020044/* In-memory structure with quota header information */
45struct ocfs2_mem_dqinfo {
46 unsigned int dqi_type; /* Quota type this structure describes */
47 unsigned int dqi_chunks; /* Number of chunks in local quota file */
48 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
49 unsigned int dqi_syncms; /* How often should we sync with other nodes */
50 struct list_head dqi_chunk; /* List of chunks */
51 struct inode *dqi_gqinode; /* Global quota file inode */
52 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
53 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
54 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
Jan Karaae4f6ef2010-04-28 19:04:29 +020055 u64 dqi_giblk; /* Number of block with global information header */
Jan Kara9e33d692008-08-25 19:56:50 +020056 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
Jan Karaae4f6ef2010-04-28 19:04:29 +020057 struct buffer_head *dqi_libh; /* Buffer with local information header */
Jan Kara9e33d692008-08-25 19:56:50 +020058 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
Mark Fasheh171bf932008-10-20 15:36:47 +020059 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
Jan Kara22053632008-10-20 23:50:38 +020060 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
61 * information, in case we
62 * enable quotas on file
63 * needing it */
Jan Kara9e33d692008-08-25 19:56:50 +020064};
65
66static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
67{
68 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
69}
70
71struct ocfs2_quota_chunk {
72 struct list_head qc_chunk; /* List of quotafile chunks */
73 int qc_num; /* Number of quota chunk */
74 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
75};
76
77extern struct kmem_cache *ocfs2_dquot_cachep;
78extern struct kmem_cache *ocfs2_qf_chunk_cachep;
79
80extern struct qtree_fmt_operations ocfs2_global_ops;
81
Jan Kara22053632008-10-20 23:50:38 +020082struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
83 struct ocfs2_super *osb, int slot_num);
84int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
85 struct ocfs2_quota_recovery *rec,
86 int slot_num);
87void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
Jan Kara9e33d692008-08-25 19:56:50 +020088ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
89 size_t len, loff_t off);
90ssize_t ocfs2_quota_write(struct super_block *sb, int type,
91 const char *data, size_t len, loff_t off);
92int ocfs2_global_read_info(struct super_block *sb, int type);
93int ocfs2_global_write_info(struct super_block *sb, int type);
94int ocfs2_global_read_dquot(struct dquot *dquot);
95int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
96static inline int ocfs2_sync_dquot(struct dquot *dquot)
97{
98 return __ocfs2_sync_dquot(dquot, 0);
99}
100static inline int ocfs2_global_release_dquot(struct dquot *dquot)
101{
102 return __ocfs2_sync_dquot(dquot, 1);
103}
104
105int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
106void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200107int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
Jan Karaf64dd442010-04-28 00:22:30 +0200108int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
109 struct buffer_head **bh);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200110int ocfs2_create_local_dquot(struct dquot *dquot);
111int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
Jan Kara741e1282010-05-13 18:05:15 +0200112int ocfs2_local_write_dquot(struct dquot *dquot);
Jan Kara9e33d692008-08-25 19:56:50 +0200113
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700114extern const struct dquot_operations ocfs2_quota_operations;
Jan Kara9e33d692008-08-25 19:56:50 +0200115extern struct quota_format_type ocfs2_quota_format;
116
Mark Fasheh171bf932008-10-20 15:36:47 +0200117int ocfs2_quota_setup(void);
118void ocfs2_quota_shutdown(void);
119
Jan Kara9e33d692008-08-25 19:56:50 +0200120#endif /* _OCFS2_QUOTA_H */