4 * On disk quota structures for local and global quota file, in-memory
10 #define _OCFS2_QUOTA_H
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>
21 * In-memory structures
24 struct dquot dq_dquot; /* Generic VFS dquot */
25 loff_t dq_local_off; /* Offset in the local quota file */
26 struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */
27 unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
28 s64 dq_origspace; /* Last globally synced space usage */
29 s64 dq_originodes; /* Last globally synced inode usage */
32 /* Description of one chunk to recover in memory */
33 struct ocfs2_recovery_chunk {
34 struct list_head rc_list; /* List of chunks */
35 int rc_chunk; /* Chunk number */
36 unsigned long *rc_bitmap; /* Bitmap of entries to recover */
39 struct ocfs2_quota_recovery {
40 struct list_head r_list[MAXQUOTAS]; /* List of chunks to recover */
43 /* In-memory structure with quota header information */
44 struct ocfs2_mem_dqinfo {
45 unsigned int dqi_type; /* Quota type this structure describes */
46 unsigned int dqi_chunks; /* Number of chunks in local quota file */
47 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
48 unsigned int dqi_syncms; /* How often should we sync with other nodes */
49 struct list_head dqi_chunk; /* List of chunks */
50 struct inode *dqi_gqinode; /* Global quota file inode */
51 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
52 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
53 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
54 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
55 struct buffer_head *dqi_ibh; /* Buffer with information header */
56 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
57 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
58 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
59 * information, in case we
60 * enable quotas on file
64 static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
66 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
69 struct ocfs2_quota_chunk {
70 struct list_head qc_chunk; /* List of quotafile chunks */
71 int qc_num; /* Number of quota chunk */
72 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
75 extern struct kmem_cache *ocfs2_dquot_cachep;
76 extern struct kmem_cache *ocfs2_qf_chunk_cachep;
78 extern struct qtree_fmt_operations ocfs2_global_ops;
80 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
81 struct ocfs2_super *osb, int slot_num);
82 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
83 struct ocfs2_quota_recovery *rec,
85 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
86 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
87 size_t len, loff_t off);
88 ssize_t ocfs2_quota_write(struct super_block *sb, int type,
89 const char *data, size_t len, loff_t off);
90 int ocfs2_global_read_info(struct super_block *sb, int type);
91 int ocfs2_global_write_info(struct super_block *sb, int type);
92 int ocfs2_global_read_dquot(struct dquot *dquot);
93 int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
94 static inline int ocfs2_sync_dquot(struct dquot *dquot)
96 return __ocfs2_sync_dquot(dquot, 0);
98 static inline int ocfs2_global_release_dquot(struct dquot *dquot)
100 return __ocfs2_sync_dquot(dquot, 1);
103 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
104 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
105 int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
106 struct buffer_head **bh);
108 extern const struct dquot_operations ocfs2_quota_operations;
109 extern struct quota_format_type ocfs2_quota_format;
111 int ocfs2_quota_setup(void);
112 void ocfs2_quota_shutdown(void);
114 #endif /* _OCFS2_QUOTA_H */