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Release 4.10 fs/ocfs2/quota.h

Directory: fs/ocfs2
 * quota.h for OCFS2
 * On disk quota structures for local and global quota file, in-memory
 * structures.

#ifndef _OCFS2_QUOTA_H

#define _OCFS2_QUOTA_H

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/quota.h>
#include <linux/list.h>
#include <linux/dqblk_qtree.h>

#include "ocfs2.h"

/* Number of quota types we support */


 * In-memory structures

struct ocfs2_dquot {
struct dquot dq_dquot;	/* Generic VFS dquot */
loff_t dq_local_off;	/* Offset in the local quota file */
u64 dq_local_phys_blk;	/* Physical block carrying quota structure */
struct ocfs2_quota_chunk *dq_chunk;	/* Chunk dquot is in */
unsigned int dq_use_count;	/* Number of nodes having reference to this entry in global quota file */
s64 dq_origspace;	/* Last globally synced space usage */
s64 dq_originodes;	/* Last globally synced inode usage */
struct llist_node list;	/* Member of list of dquots to drop */

/* Description of one chunk to recover in memory */

struct ocfs2_recovery_chunk {
struct list_head rc_list;	/* List of chunks */
int rc_chunk;			/* Chunk number */
unsigned long *rc_bitmap;	/* Bitmap of entries to recover */

struct ocfs2_quota_recovery {
struct list_head r_list[OCFS2_MAXQUOTAS];	/* List of chunks to recover */

/* In-memory structure with quota header information */

struct ocfs2_mem_dqinfo {
unsigned int dqi_type;		/* Quota type this structure describes */
unsigned int dqi_flags;		/* Flags OLQF_* */
unsigned int dqi_chunks;	/* Number of chunks in local quota file */
unsigned int dqi_blocks;	/* Number of blocks allocated for local quota file */
unsigned int dqi_syncms;	/* How often should we sync with other nodes */
struct list_head dqi_chunk;	/* List of chunks */
struct inode *dqi_gqinode;	/* Global quota file inode */
struct ocfs2_lock_res dqi_gqlock;	/* Lock protecting quota information structure */
struct buffer_head *dqi_gqi_bh;	/* Buffer head with global quota file inode - set only if inode lock is obtained */
int dqi_gqi_count;		/* Number of holders of dqi_gqi_bh */
u64 dqi_giblk;			/* Number of block with global information header */
struct buffer_head *dqi_lqi_bh;	/* Buffer head with local quota file inode */
struct buffer_head *dqi_libh;	/* Buffer with local information header */
struct qtree_mem_dqinfo dqi_gi;	/* Info about global file */
struct delayed_work dqi_sync_work;	/* Work for syncing dquots */
struct ocfs2_quota_recovery *dqi_rec;	/* Pointer to recovery
                                                 * information, in case we
                                                 * enable quotas on file
                                                 * needing it */

static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot) { return container_of(dquot, struct ocfs2_dquot, dq_dquot); }


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struct ocfs2_quota_chunk { struct list_head qc_chunk; /* List of quotafile chunks */ int qc_num; /* Number of quota chunk */ struct buffer_head *qc_headerbh; /* Buffer head with chunk header */ }; extern struct kmem_cache *ocfs2_dquot_cachep; extern struct kmem_cache *ocfs2_qf_chunk_cachep; extern const struct qtree_fmt_operations ocfs2_global_ops; struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( struct ocfs2_super *osb, int slot_num); int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, struct ocfs2_quota_recovery *rec, int slot_num); void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec); ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off); ssize_t ocfs2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); int ocfs2_global_read_info(struct super_block *sb, int type); int ocfs2_global_write_info(struct super_block *sb, int type); int ocfs2_global_read_dquot(struct dquot *dquot); int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
static inline int ocfs2_sync_dquot(struct dquot *dquot) { return __ocfs2_sync_dquot(dquot, 0); }


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static inline int ocfs2_global_release_dquot(struct dquot *dquot) { return __ocfs2_sync_dquot(dquot, 1); }


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int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh); int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, struct buffer_head **bh); int ocfs2_create_local_dquot(struct dquot *dquot); int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot); int ocfs2_local_write_dquot(struct dquot *dquot); void ocfs2_drop_dquot_refs(struct work_struct *work); extern const struct dquot_operations ocfs2_quota_operations; extern struct quota_format_type ocfs2_quota_format; #endif /* _OCFS2_QUOTA_H */

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Directory: fs/ocfs2
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