patch-2.3.2 linux/include/linux/efs_fs_sb.h

• Lines: 63
• Date: Thu May 13 23:50:15 1999
• Orig file: v2.3.1/linux/include/linux/efs_fs_sb.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.1/linux/include/linux/efs_fs_sb.h linux/include/linux/efs_fs_sb.h
@@ -0,0 +1,62 @@
+/*
+ * efs_fs_sb.h
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from IRIX header files (c) 1988 Silicon Graphics
+ */
+
+#ifndef __EFS_FS_SB_H__
+#define __EFS_FS_SB_H__
+
+/* statfs() magic number for EFS */
+#define EFS_SUPER_MAGIC	0x414A53
+
+/* EFS superblock magic numbers */
+#define EFS_MAGIC	0x072959
+#define EFS_NEWMAGIC	0x07295a
+
+#define IS_EFS_MAGIC(x)	((x == EFS_MAGIC) || (x == EFS_NEWMAGIC))
+
+#define EFS_SUPER		1
+#define EFS_ROOTINODE		2
+
+/* efs superblock on disk */
+struct efs_super {
+	int32_t		fs_size;        /* size of filesystem, in sectors */
+	int32_t		fs_firstcg;     /* bb offset to first cg */
+	int32_t		fs_cgfsize;     /* size of cylinder group in bb's */
+	short		fs_cgisize;     /* bb's of inodes per cylinder group */
+	short		fs_sectors;     /* sectors per track */
+	short		fs_heads;       /* heads per cylinder */
+	short		fs_ncg;         /* # of cylinder groups in filesystem */
+	short		fs_dirty;       /* fs needs to be fsck'd */
+	int32_t		fs_time;        /* last super-block update */
+	int32_t		fs_magic;       /* magic number */
+	char		fs_fname[6];    /* file system name */
+	char		fs_fpack[6];    /* file system pack name */
+	int32_t		fs_bmsize;      /* size of bitmap in bytes */
+	int32_t		fs_tfree;       /* total free data blocks */
+	int32_t		fs_tinode;      /* total free inodes */
+	int32_t		fs_bmblock;     /* bitmap location. */
+	int32_t		fs_replsb;      /* Location of replicated superblock. */
+	int32_t		fs_lastialloc;  /* last allocated inode */
+	char		fs_spare[20];   /* space for expansion - MUST BE ZERO */
+	int32_t		fs_checksum;    /* checksum of volume portion of fs */
+};
+
+/* efs superblock information in memory */
+struct efs_sb_info {
+	int32_t	fs_magic;	/* superblock magic number */
+	int32_t	fs_start;	/* first block of filesystem */
+	int32_t	first_block;	/* first data block in filesystem */
+	int32_t	total_blocks;	/* total number of blocks in filesystem */
+	int32_t	group_size;	/* # of blocks a group consists of */ 
+	int32_t	data_free;	/* # of free data blocks */
+	int32_t	inode_free;	/* # of free inodes */
+	short	inode_blocks;	/* # of blocks used for inodes in every grp */
+	short	total_groups;	/* # of groups */
+};
+
+#endif /* __EFS_FS_SB_H__ */
+