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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 Kara52362812014-09-10 21:06:39 +020020/* Number of quota types we support */
21#define OCFS2_MAXQUOTAS 2
22
Jan Kara9e33d692008-08-25 19:56:50 +020023/*
24 * In-memory structures
25 */
26struct ocfs2_dquot {
27 struct dquot dq_dquot; /* Generic VFS dquot */
28 loff_t dq_local_off; /* Offset in the local quota file */
Jan Karaf64dd442010-04-28 00:22:30 +020029 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
Jan Kara9e33d692008-08-25 19:56:50 +020030 struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */
31 unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
32 s64 dq_origspace; /* Last globally synced space usage */
33 s64 dq_originodes; /* Last globally synced inode usage */
Jan Karae3a767b2014-04-03 14:46:56 -070034 struct llist_node list; /* Member of list of dquots to drop */
Jan Kara9e33d692008-08-25 19:56:50 +020035};
36
Jan Kara22053632008-10-20 23:50:38 +020037/* Description of one chunk to recover in memory */
38struct ocfs2_recovery_chunk {
39 struct list_head rc_list; /* List of chunks */
40 int rc_chunk; /* Chunk number */
41 unsigned long *rc_bitmap; /* Bitmap of entries to recover */
42};
43
44struct ocfs2_quota_recovery {
Jan Kara52362812014-09-10 21:06:39 +020045 struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */
Jan Kara22053632008-10-20 23:50:38 +020046};
47
Jan Kara9e33d692008-08-25 19:56:50 +020048/* In-memory structure with quota header information */
49struct ocfs2_mem_dqinfo {
50 unsigned int dqi_type; /* Quota type this structure describes */
Jan Kara96827ad2014-11-19 10:41:41 +010051 unsigned int dqi_flags; /* Flags OLQF_* */
Jan Kara9e33d692008-08-25 19:56:50 +020052 unsigned int dqi_chunks; /* Number of chunks in local quota file */
53 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
54 unsigned int dqi_syncms; /* How often should we sync with other nodes */
55 struct list_head dqi_chunk; /* List of chunks */
56 struct inode *dqi_gqinode; /* Global quota file inode */
57 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
58 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
59 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
Jan Karaae4f6ef2010-04-28 19:04:29 +020060 u64 dqi_giblk; /* Number of block with global information header */
Jan Kara9e33d692008-08-25 19:56:50 +020061 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
Jan Karaae4f6ef2010-04-28 19:04:29 +020062 struct buffer_head *dqi_libh; /* Buffer with local information header */
Jan Kara9e33d692008-08-25 19:56:50 +020063 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
Mark Fasheh171bf932008-10-20 15:36:47 +020064 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
Jan Kara22053632008-10-20 23:50:38 +020065 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
66 * information, in case we
67 * enable quotas on file
68 * needing it */
Jan Kara9e33d692008-08-25 19:56:50 +020069};
70
71static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
72{
73 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
74}
75
76struct ocfs2_quota_chunk {
77 struct list_head qc_chunk; /* List of quotafile chunks */
78 int qc_num; /* Number of quota chunk */
79 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
80};
81
82extern struct kmem_cache *ocfs2_dquot_cachep;
83extern struct kmem_cache *ocfs2_qf_chunk_cachep;
84
85extern struct qtree_fmt_operations ocfs2_global_ops;
86
Jan Kara22053632008-10-20 23:50:38 +020087struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
88 struct ocfs2_super *osb, int slot_num);
89int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
90 struct ocfs2_quota_recovery *rec,
91 int slot_num);
92void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
Jan Kara9e33d692008-08-25 19:56:50 +020093ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
94 size_t len, loff_t off);
95ssize_t ocfs2_quota_write(struct super_block *sb, int type,
96 const char *data, size_t len, loff_t off);
97int ocfs2_global_read_info(struct super_block *sb, int type);
98int ocfs2_global_write_info(struct super_block *sb, int type);
99int ocfs2_global_read_dquot(struct dquot *dquot);
100int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
101static inline int ocfs2_sync_dquot(struct dquot *dquot)
102{
103 return __ocfs2_sync_dquot(dquot, 0);
104}
105static inline int ocfs2_global_release_dquot(struct dquot *dquot)
106{
107 return __ocfs2_sync_dquot(dquot, 1);
108}
109
110int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
111void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200112int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
Jan Karaf64dd442010-04-28 00:22:30 +0200113int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
114 struct buffer_head **bh);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200115int ocfs2_create_local_dquot(struct dquot *dquot);
116int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
Jan Kara741e1282010-05-13 18:05:15 +0200117int ocfs2_local_write_dquot(struct dquot *dquot);
Jan Karae3a767b2014-04-03 14:46:56 -0700118void ocfs2_drop_dquot_refs(struct work_struct *work);
Jan Kara9e33d692008-08-25 19:56:50 +0200119
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700120extern const struct dquot_operations ocfs2_quota_operations;
Jan Kara9e33d692008-08-25 19:56:50 +0200121extern struct quota_format_type ocfs2_quota_format;
122
Jan Kara9e33d692008-08-25 19:56:50 +0200123#endif /* _OCFS2_QUOTA_H */