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>
20 /* Number of quota types we support */
21 #define OCFS2_MAXQUOTAS 2
24 * In-memory structures
27 struct dquot dq_dquot; /* Generic VFS dquot */
28 loff_t dq_local_off; /* Offset in the local quota file */
29 u64 dq_local_phys_blk; /* Physical block carrying quota structure */
30 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 */
34 struct llist_node list; /* Member of list of dquots to drop */
37 /* Description of one chunk to recover in memory */
38 struct 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 */
44 struct ocfs2_quota_recovery {
45 struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */
48 /* In-memory structure with quota header information */
49 struct ocfs2_mem_dqinfo {
50 unsigned int dqi_type; /* Quota type this structure describes */
51 unsigned int dqi_flags; /* Flags OLQF_* */
52 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 */
60 u64 dqi_giblk; /* Number of block with global information header */
61 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
62 struct buffer_head *dqi_libh; /* Buffer with local information header */
63 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
64 struct delayed_work dqi_sync_work; /* Work for syncing dquots */
65 struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
66 * information, in case we
67 * enable quotas on file
71 static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
73 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
76 struct 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 */
82 extern struct kmem_cache *ocfs2_dquot_cachep;
83 extern struct kmem_cache *ocfs2_qf_chunk_cachep;
85 extern struct qtree_fmt_operations ocfs2_global_ops;
87 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
88 struct ocfs2_super *osb, int slot_num);
89 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
90 struct ocfs2_quota_recovery *rec,
92 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
93 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
94 size_t len, loff_t off);
95 ssize_t ocfs2_quota_write(struct super_block *sb, int type,
96 const char *data, size_t len, loff_t off);
97 int ocfs2_global_read_info(struct super_block *sb, int type);
98 int ocfs2_global_write_info(struct super_block *sb, int type);
99 int ocfs2_global_read_dquot(struct dquot *dquot);
100 int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
101 static inline int ocfs2_sync_dquot(struct dquot *dquot)
103 return __ocfs2_sync_dquot(dquot, 0);
105 static inline int ocfs2_global_release_dquot(struct dquot *dquot)
107 return __ocfs2_sync_dquot(dquot, 1);
110 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
111 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
112 int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
113 int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
114 struct buffer_head **bh);
115 int ocfs2_create_local_dquot(struct dquot *dquot);
116 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
117 int ocfs2_local_write_dquot(struct dquot *dquot);
118 void ocfs2_drop_dquot_refs(struct work_struct *work);
120 extern const struct dquot_operations ocfs2_quota_operations;
121 extern struct quota_format_type ocfs2_quota_format;
123 #endif /* _OCFS2_QUOTA_H */