#ifndef __GFS2_ONDISK_DOT_H__
#define __GFS2_ONDISK_DOT_H__
+#include <linux/types.h>
+
#define GFS2_MAGIC 0x01161970
#define GFS2_BASIC_BLOCK 512
#define GFS2_BASIC_BLOCK_SHIFT 9
__be64 no_addr;
};
-struct gfs2_inum_host {
- __u64 no_formal_ino;
- __u64 no_addr;
-};
-
/*
* Generic metadata head structure
* Every inplace buffer logged in the journal must start with this.
__be32 mh_type;
__be64 __pad0; /* Was generation number in gfs1 */
__be32 mh_format;
- __be32 __pad1; /* Was incarnation number in gfs1 */
-};
-
-struct gfs2_meta_header_host {
- __u32 mh_magic;
- __u32 mh_type;
- __u32 mh_format;
+ /* This union is to keep userspace happy */
+ union {
+ __be32 mh_jid; /* Was incarnation number in gfs1 */
+ __be32 __pad1;
+ };
};
/*
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
- /* In gfs1, quota and license dinodes followed */
-};
-struct gfs2_sb_host {
- struct gfs2_meta_header_host sb_header;
-
- __u32 sb_fs_format;
- __u32 sb_multihost_format;
-
- __u32 sb_bsize;
- __u32 sb_bsize_shift;
-
- struct gfs2_inum_host sb_master_dir; /* Was jindex dinode in gfs1 */
- struct gfs2_inum_host sb_root_dir;
-
- char sb_lockproto[GFS2_LOCKNAME_LEN];
- char sb_locktable[GFS2_LOCKNAME_LEN];
- /* In gfs1, quota and license dinodes followed */
+ struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
+ struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
+#define GFS2_HAS_UUID 1
+ __u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
};
/*
__u8 ri_reserved[64];
};
-struct gfs2_rindex_host {
- __u64 ri_addr; /* grp block disk address */
- __u64 ri_data0; /* first data location */
- __u32 ri_length; /* length of rgrp header in fs blocks */
- __u32 ri_data; /* num of data blocks in rgrp */
- __u32 ri_bitbytes; /* number of bytes in data bitmaps */
-};
-
/*
* resource group header structure
*/
__u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
};
-struct gfs2_rgrp_host {
- __u32 rg_flags;
- __u32 rg_free;
- __u32 rg_dinodes;
- __u64 rg_igeneration;
-};
-
/*
* quota structure
*/
__u8 qu_reserved[64];
};
-struct gfs2_quota_host {
- __u64 qu_limit;
- __u64 qu_warn;
- __u64 qu_value;
-};
-
/*
* dinode structure
*/
struct gfs2_inum __pad4; /* Unused even in current gfs1 */
__be64 di_eattr; /* extended attribute block number */
+ __be32 di_atime_nsec; /* nsec portion of atime */
+ __be32 di_mtime_nsec; /* nsec portion of mtime */
+ __be32 di_ctime_nsec; /* nsec portion of ctime */
- __u8 di_reserved[56];
-};
-
-struct gfs2_dinode_host {
- __u64 di_size; /* number of bytes in file */
- __u64 di_blocks; /* number of blocks in file */
-
- /* This section varies from gfs1. Padding added to align with
- * remainder of dinode
- */
- __u64 di_goal_meta; /* rgrp to alloc from next */
- __u64 di_goal_data; /* data block goal */
- __u64 di_generation; /* generation number for NFS */
-
- __u32 di_flags; /* GFS2_DIF_... */
- __u16 di_height; /* height of metadata */
-
- /* These only apply to directories */
- __u16 di_depth; /* Number of bits in the table */
- __u32 di_entries; /* The number of entries in the directory */
-
- __u64 di_eattr; /* extended attribute block number */
+ __u8 di_reserved[44];
};
/*
/*
* Extended attribute header format
+ *
+ * This works in a similar way to dirents. There is a fixed size header
+ * followed by a variable length section made up of the name and the
+ * associated data. In the case of a "stuffed" entry, the value is
+ * inline directly after the name, the ea_num_ptrs entry will be
+ * zero in that case. For non-"stuffed" entries, there will be
+ * a set of pointers (aligned to 8 byte boundary) to the block(s)
+ * containing the value.
+ *
+ * The blocks containing the values and the blocks containing the
+ * extended attribute headers themselves all start with the common
+ * metadata header. Each inode, if it has extended attributes, will
+ * have either a single block containing the extended attribute headers
+ * or a single indirect block pointing to blocks containing the
+ * extended attribure headers.
+ *
+ * The maximim size of the data part of an extended attribute is 64k
+ * so the number of blocks required depends upon block size. Since the
+ * block size also determines the number of pointers in an indirect
+ * block, its a fairly complicated calculation to work out the maximum
+ * number of blocks that an inode may have relating to extended attributes.
+ *
*/
#define GFS2_EA_MAX_NAME_LEN 255
__be32 lh_hash;
};
-struct gfs2_log_header_host {
- struct gfs2_meta_header_host lh_header;
-
- __u64 lh_sequence; /* Sequence number of this transaction */
- __u32 lh_flags; /* GFS2_LOG_HEAD_... */
- __u32 lh_tail; /* Block number of log tail */
- __u32 lh_blkno;
- __u32 lh_hash;
-};
-
/*
* Log type descriptor
*/
__be64 ir_length;
};
-struct gfs2_inum_range_host {
- __u64 ir_start;
- __u64 ir_length;
-};
-
/*
* Statfs change
* Describes an change to the pool of free and allocated
__be64 sc_dinodes;
};
-struct gfs2_statfs_change_host {
- __u64 sc_total;
- __u64 sc_free;
- __u64 sc_dinodes;
-};
-
/*
* Quota change
* Describes an allocation change for a particular
__be32 qc_id;
};
-struct gfs2_quota_change_host {
- __u64 qc_change;
- __u32 qc_flags; /* GFS2_QCF_... */
- __u32 qc_id;
-};
-
struct gfs2_quota_lvb {
__be32 qb_magic;
- u32 __pad;
+ __u32 __pad;
__be64 qb_limit; /* Hard limit of # blocks to alloc */
__be64 qb_warn; /* Warn user when alloc is above this # */
__be64 qb_value; /* Current # blocks allocated */
};
-#ifdef __KERNEL__
-/* Translation functions */
-struct gfs2_inode;
-
-extern void gfs2_inum_out(const struct gfs2_inode *ip, struct gfs2_dirent *dent);
-extern void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf);
-extern void gfs2_rindex_in(struct gfs2_rindex_host *ri, const void *buf);
-extern void gfs2_rindex_out(const struct gfs2_rindex_host *ri, void *buf);
-extern void gfs2_rgrp_in(struct gfs2_rgrp_host *rg, const void *buf);
-extern void gfs2_rgrp_out(const struct gfs2_rgrp_host *rg, void *buf);
-extern void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf);
-struct gfs2_inode;
-extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
-extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, const void *buf);
-extern void gfs2_ea_header_out(const struct gfs2_ea_header *ea, void *buf);
-extern void gfs2_log_header_in(struct gfs2_log_header_host *lh, const void *buf);
-extern void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf);
-extern void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf);
-extern void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf);
-extern void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf);
-extern void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf);
-
-/* Printing functions */
-
-extern void gfs2_rindex_print(const struct gfs2_rindex_host *ri);
-extern void gfs2_dinode_print(const struct gfs2_inode *ip);
-
-#endif /* __KERNEL__ */
-
#endif /* __GFS2_ONDISK_DOT_H__ */
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