From 464df1d5e5ab1322e2dd0a7796939fff1aeefa9a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:49:25 +0200 Subject: Adding upstream version 1.47.0. Signed-off-by: Daniel Baumann --- lib/support/quotaio_tree.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 lib/support/quotaio_tree.h (limited to 'lib/support/quotaio_tree.h') diff --git a/lib/support/quotaio_tree.h b/lib/support/quotaio_tree.h new file mode 100644 index 0000000..b0b7257 --- /dev/null +++ b/lib/support/quotaio_tree.h @@ -0,0 +1,64 @@ +/* + * Definitions of structures for vfsv0 quota format + */ + +#ifndef _LINUX_QUOTA_TREE_H +#define _LINUX_QUOTA_TREE_H + +#include + +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); +}; + +/* In-memory 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 */ -- cgit v1.2.3