1 files changed, 93 insertions, 0 deletions

diff --git a/fs/ocfs2/quota.h b/fs/ocfs2/quota.h
new file mode 100644
index 000000000000..1f1c86311b32
--- /dev/null
+++ b/fs/ocfs2/quota.h
@@ -0,0 +1,93 @@
+/*
+ * 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"
+
+/* Common stuff */
+/* id number of quota format */
+#define QFMT_OCFS2 3
+
+/*
+ * In-memory structures
+ */
+struct ocfs2_dquot {
+        struct dquot dq_dquot;  /* Generic VFS dquot */
+        loff_t dq_local_off;    /* Offset in the local quota file */
+        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 */
+};
+
+/* In-memory structure with quota header information */
+struct ocfs2_mem_dqinfo {
+        unsigned int dqi_type;          /* Quota type this structure describes */
+        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 */
+        struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
+        struct buffer_head *dqi_ibh;    /* Buffer with information header */
+        struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
+};
+
+static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
+{
+        return container_of(dquot, struct ocfs2_dquot, dq_dquot);
+}
+
+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 struct qtree_fmt_operations ocfs2_global_ops;
+
+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);
+}
+static inline int ocfs2_global_release_dquot(struct dquot *dquot)
+{
+        return __ocfs2_sync_dquot(dquot, 1);
+}
+
+int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
+void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
+struct buffer_head *ocfs2_read_quota_block(struct inode *inode,
+                                           int block, int *err);
+
+extern struct dquot_operations ocfs2_quota_operations;
+extern struct quota_format_type ocfs2_quota_format;
+
+#endif /* _OCFS2_QUOTA_H */