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 /* id number of quota format */
25 * In-memory structures
28 struct dquot dq_dquot; /* Generic VFS dquot */
29 loff_t dq_local_off; /* Offset in the local quota file */
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 */
36 /* In-memory structure with quota header information */
37 struct ocfs2_mem_dqinfo {
38 unsigned int dqi_type; /* Quota type this structure describes */
39 unsigned int dqi_chunks; /* Number of chunks in local quota file */
40 unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
41 unsigned int dqi_syncms; /* How often should we sync with other nodes */
42 struct list_head dqi_chunk; /* List of chunks */
43 struct inode *dqi_gqinode; /* Global quota file inode */
44 struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
45 struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
46 int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
47 struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
48 struct buffer_head *dqi_ibh; /* Buffer with information header */
49 struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
52 static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
54 return container_of(dquot, struct ocfs2_dquot, dq_dquot);
57 struct ocfs2_quota_chunk {
58 struct list_head qc_chunk; /* List of quotafile chunks */
59 int qc_num; /* Number of quota chunk */
60 struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
63 extern struct kmem_cache *ocfs2_dquot_cachep;
64 extern struct kmem_cache *ocfs2_qf_chunk_cachep;
66 extern struct qtree_fmt_operations ocfs2_global_ops;
68 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
69 size_t len, loff_t off);
70 ssize_t ocfs2_quota_write(struct super_block *sb, int type,
71 const char *data, size_t len, loff_t off);
72 int ocfs2_global_read_info(struct super_block *sb, int type);
73 int ocfs2_global_write_info(struct super_block *sb, int type);
74 int ocfs2_global_read_dquot(struct dquot *dquot);
75 int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
76 static inline int ocfs2_sync_dquot(struct dquot *dquot)
78 return __ocfs2_sync_dquot(dquot, 0);
80 static inline int ocfs2_global_release_dquot(struct dquot *dquot)
82 return __ocfs2_sync_dquot(dquot, 1);
85 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
86 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
87 struct buffer_head *ocfs2_read_quota_block(struct inode *inode,
90 extern struct dquot_operations ocfs2_quota_operations;
91 extern struct quota_format_type ocfs2_quota_format;
93 #endif /* _OCFS2_QUOTA_H */