Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ocfs2 / quota.h

diff --git a/kernel/fs/ocfs2/quota.h b/kernel/fs/ocfs2/quota.h
new file mode 100644 (file)
index 0000000..b6d5133
--- /dev/null
+++ b/kernel/fs/ocfs2/quota.h
@@ -0,0 +1,123 @@
+/*
+ * 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 */
+#define OCFS2_MAXQUOTAS 2
+
+/*
+ * 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);
+}
+
+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;
+
+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);
+}
+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);
+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 */