| /* |
| * Definitions of structures for vfsv0 quota format |
| */ |
| |
| #ifndef _LINUX_QUOTA_TREE_H |
| #define _LINUX_QUOTA_TREE_H |
| |
| #include <sys/types.h> |
| |
| typedef __u32 qid_t; /* Type in which we store ids in memory */ |
| |
| #define QT_TREEOFF 1 /* Offset of tree in file in blocks */ |
| #define QT_TREEDEPTH 4 /* Depth of quota tree */ |
| #define QT_BLKSIZE_BITS 10 |
| #define QT_BLKSIZE (1 << QT_BLKSIZE_BITS) /* Size of block with quota |
| * structures */ |
| |
| /* |
| * Structure of header of block with quota structures. It is padded to 16 bytes |
| * so there will be space for exactly 21 quota-entries in a block |
| */ |
| struct qt_disk_dqdbheader { |
| __le32 dqdh_next_free; /* Number of next block with free |
| * entry */ |
| __le32 dqdh_prev_free; /* Number of previous block with free |
| * entry */ |
| __le16 dqdh_entries; /* Number of valid entries in block */ |
| __le16 dqdh_pad1; |
| __le32 dqdh_pad2; |
| } __attribute__ ((packed)); |
| |
| struct dquot; |
| struct quota_handle; |
| |
| /* Operations */ |
| struct qtree_fmt_operations { |
| /* Convert given entry from in memory format to disk one */ |
| void (*mem2disk_dqblk)(void *disk, struct dquot *dquot); |
| /* Convert given entry from disk format to in memory one */ |
| void (*disk2mem_dqblk)(struct dquot *dquot, void *disk); |
| /* Is this structure for given id? */ |
| int (*is_id)(void *disk, struct dquot *dquot); |
| }; |
| |
| /* Inmemory copy of version specific information */ |
| struct qtree_mem_dqinfo { |
| unsigned int dqi_blocks; /* # of blocks in quota file */ |
| unsigned int dqi_free_blk; /* First block in list of free blocks */ |
| unsigned int dqi_free_entry; /* First block with free entry */ |
| unsigned int dqi_entry_size; /* Size of quota entry in quota file */ |
| struct qtree_fmt_operations *dqi_ops; /* Operations for entry |
| * manipulation */ |
| }; |
| |
| void qtree_write_dquot(struct dquot *dquot); |
| struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id); |
| void qtree_delete_dquot(struct dquot *dquot); |
| int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk); |
| int qtree_scan_dquots(struct quota_handle *h, |
| int (*process_dquot) (struct dquot *, void *), void *data); |
| |
| int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info); |
| |
| #endif /* _LINUX_QUOTAIO_TREE_H */ |