summaryrefslogtreecommitdiff
path: root/serverboot/ext2_fs.h
diff options
context:
space:
mode:
Diffstat (limited to 'serverboot/ext2_fs.h')
-rw-r--r--serverboot/ext2_fs.h451
1 files changed, 451 insertions, 0 deletions
diff --git a/serverboot/ext2_fs.h b/serverboot/ext2_fs.h
new file mode 100644
index 00000000..4068c002
--- /dev/null
+++ b/serverboot/ext2_fs.h
@@ -0,0 +1,451 @@
+/*
+ * linux/include/linux/ext2_fs.h
+ *
+ * Copyright (C) 1992, 1993, 1994 Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/include/linux/minix_fs.h
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#ifndef _LINUX_EXT2_FS_H
+#define _LINUX_EXT2_FS_H
+
+/*
+ * The second extended filesystem constants/structures
+ */
+
+/*
+ * Define EXT2FS_DEBUG to produce debug messages
+ */
+#undef EXT2FS_DEBUG
+
+/*
+ * Define EXT2FS_DEBUG_CACHE to produce cache debug messages
+ */
+#undef EXT2FS_DEBUG_CACHE
+
+/*
+ * Define EXT2FS_CHECK_CACHE to add some checks to the name cache code
+ */
+#undef EXT2FS_CHECK_CACHE
+
+/*
+ * Define EXT2FS_PRE_02B_COMPAT to convert ext 2 fs prior to 0.2b
+ */
+#undef EXT2FS_PRE_02B_COMPAT
+
+/*
+ * Define DONT_USE_DCACHE to inhibit the directory cache
+ */
+#define DONT_USE_DCACHE
+
+/*
+ * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
+ */
+#define EXT2_PREALLOCATE
+
+/*
+ * The second extended file system version
+ */
+#define EXT2FS_DATE "94/03/10"
+#define EXT2FS_VERSION "0.5"
+
+/*
+ * Debug code
+ */
+#ifdef EXT2FS_DEBUG
+# define ext2_debug(f, a...) { \
+ printk ("EXT2-fs DEBUG (%s, %d): %s:", \
+ __FILE__, __LINE__, __FUNCTION__); \
+ printk (f, ## a); \
+ }
+#else
+# define ext2_debug(f, a...) /**/
+#endif
+
+/*
+ * Special inodes numbers
+ */
+#define EXT2_BAD_INO 1 /* Bad blocks inode */
+#define EXT2_ROOT_INO 2 /* Root inode */
+#define EXT2_ACL_IDX_INO 3 /* ACL inode */
+#define EXT2_ACL_DATA_INO 4 /* ACL inode */
+#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */
+#define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */
+#define EXT2_FIRST_INO 11 /* First non reserved inode */
+
+/*
+ * The second extended file system magic number
+ */
+#define EXT2_PRE_02B_MAGIC 0xEF51
+#define EXT2_SUPER_MAGIC 0xEF53
+
+/*
+ * Maximal count of links to a file
+ */
+#define EXT2_LINK_MAX 32000
+
+/*
+ * Macro-instructions used to manage several block sizes
+ */
+#define EXT2_MIN_BLOCK_SIZE 1024
+#define EXT2_MAX_BLOCK_SIZE 4096
+#define EXT2_MIN_BLOCK_LOG_SIZE 10
+#ifdef __KERNEL__
+# define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
+#else
+# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
+#endif
+#define EXT2_ACLE_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry))
+#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (unsigned long))
+#ifdef __KERNEL__
+# define EXT2_BLOCK_SIZE_BITS(s) ((s)->u.ext2_sb.s_es->s_log_block_size + 10)
+#else
+# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
+#endif
+#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_inode))
+
+/*
+ * Macro-instructions used to manage fragments
+ */
+#define EXT2_MIN_FRAG_SIZE 1024
+#define EXT2_MAX_FRAG_SIZE 4096
+#define EXT2_MIN_FRAG_LOG_SIZE 10
+#ifdef __KERNEL__
+# define EXT2_FRAG_SIZE(s) ((s)->u.ext2_sb.s_frag_size)
+# define EXT2_FRAGS_PER_BLOCK(s) ((s)->u.ext2_sb.s_frags_per_block)
+#else
+# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
+# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
+#endif
+
+/*
+ * ACL structures
+ */
+struct ext2_acl_header /* Header of Access Control Lists */
+{
+ unsigned long aclh_size;
+ unsigned long aclh_file_count;
+ unsigned long aclh_acle_count;
+ unsigned long aclh_first_acle;
+};
+
+struct ext2_acl_entry /* Access Control List Entry */
+{
+ unsigned long acle_size;
+ unsigned short acle_perms; /* Access permissions */
+ unsigned short acle_type; /* Type of entry */
+ unsigned short acle_tag; /* User or group identity */
+ unsigned short acle_pad1;
+ unsigned long acle_next; /* Pointer on next entry for the */
+ /* same inode or on next free entry */
+};
+
+/*
+ * Structure of a blocks group descriptor
+ */
+struct ext2_old_group_desc
+{
+ unsigned long bg_block_bitmap; /* Blocks bitmap block */
+ unsigned long bg_inode_bitmap; /* Inodes bitmap block */
+ unsigned long bg_inode_table; /* Inodes table block */
+ unsigned short bg_free_blocks_count; /* Free blocks count */
+ unsigned short bg_free_inodes_count; /* Free inodes count */
+};
+
+struct ext2_group_desc
+{
+ unsigned long bg_block_bitmap; /* Blocks bitmap block */
+ unsigned long bg_inode_bitmap; /* Inodes bitmap block */
+ unsigned long bg_inode_table; /* Inodes table block */
+ unsigned short bg_free_blocks_count; /* Free blocks count */
+ unsigned short bg_free_inodes_count; /* Free inodes count */
+ unsigned short bg_used_dirs_count; /* Directories count */
+ unsigned short bg_pad;
+ unsigned long bg_reserved[3];
+};
+
+/*
+ * Macro-instructions used to manage group descriptors
+ */
+#ifdef __KERNEL__
+# define EXT2_BLOCKS_PER_GROUP(s) ((s)->u.ext2_sb.s_blocks_per_group)
+# define EXT2_DESC_PER_BLOCK(s) ((s)->u.ext2_sb.s_desc_per_block)
+# define EXT2_INODES_PER_GROUP(s) ((s)->u.ext2_sb.s_inodes_per_group)
+#else
+# define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
+# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
+# define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
+#endif
+
+/*
+ * Constants relative to the data blocks
+ */
+#define EXT2_NDIR_BLOCKS 12
+#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
+#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
+#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
+#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
+
+/*
+ * Inode flags
+ */
+#define EXT2_SECRM_FL 0x0001 /* Secure deletion */
+#define EXT2_UNRM_FL 0x0002 /* Undelete */
+#define EXT2_COMPR_FL 0x0004 /* Compress file */
+#define EXT2_SYNC_FL 0x0008 /* Synchronous updates */
+
+/*
+ * ioctl commands
+ */
+#define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
+#define EXT2_IOC_SETFLAGS _IOW('f', 2, long)
+#define EXT2_IOC_GETVERSION _IOR('v', 1, long)
+#define EXT2_IOC_SETVERSION _IOW('v', 2, long)
+
+/*
+ * Structure of an inode on the disk
+ */
+struct ext2_inode {
+ unsigned short i_mode; /* File mode */
+ unsigned short i_uid; /* Owner Uid */
+ unsigned long i_size; /* Size in bytes */
+ unsigned long i_atime; /* Access time */
+ unsigned long i_ctime; /* Creation time */
+ unsigned long i_mtime; /* Modification time */
+ unsigned long i_dtime; /* Deletion Time */
+ unsigned short i_gid; /* Group Id */
+ unsigned short i_links_count; /* Links count */
+ unsigned long i_blocks; /* Blocks count */
+ unsigned long i_flags; /* File flags */
+ unsigned long i_reserved1;
+ unsigned long i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
+ unsigned long i_version; /* File version (for NFS) */
+ unsigned long i_file_acl; /* File ACL */
+ unsigned long i_dir_acl; /* Directory ACL */
+ unsigned long i_faddr; /* Fragment address */
+ unsigned char i_frag; /* Fragment number */
+ unsigned char i_fsize; /* Fragment size */
+ unsigned short i_pad1;
+ unsigned long i_reserved2[2];
+};
+
+/*
+ * File system states
+ */
+#define EXT2_VALID_FS 0x0001 /* Unmounted cleany */
+#define EXT2_ERROR_FS 0x0002 /* Errors detected */
+
+/*
+ * Mount flags
+ */
+#define EXT2_MOUNT_CHECK_NORMAL 0x0001 /* Do some more checks */
+#define EXT2_MOUNT_CHECK_STRICT 0x0002 /* Do again more checks */
+#define EXT2_MOUNT_CHECK (EXT2_MOUNT_CHECK_NORMAL | \
+ EXT2_MOUNT_CHECK_STRICT)
+#define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */
+#define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */
+#define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
+#define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
+#define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
+
+#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
+#define set_opt(o, opt) o |= EXT2_MOUNT_##opt
+#define test_opt(sb, opt) ((sb)->u.ext2_sb.s_mount_opt & \
+ EXT2_MOUNT_##opt)
+/*
+ * Maximal mount counts between two filesystem checks
+ */
+#define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
+#define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */
+
+/*
+ * Behaviour when detecting errors
+ */
+#define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
+#define EXT2_ERRORS_RO 2 /* Remount fs read-only */
+#define EXT2_ERRORS_PANIC 3 /* Panic */
+#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
+
+/*
+ * Structure of the super block
+ */
+struct ext2_super_block {
+ unsigned long s_inodes_count; /* Inodes count */
+ unsigned long s_blocks_count; /* Blocks count */
+ unsigned long s_r_blocks_count;/* Reserved blocks count */
+ unsigned long s_free_blocks_count;/* Free blocks count */
+ unsigned long s_free_inodes_count;/* Free inodes count */
+ unsigned long s_first_data_block;/* First Data Block */
+ unsigned long s_log_block_size;/* Block size */
+ long s_log_frag_size; /* Fragment size */
+ unsigned long s_blocks_per_group;/* # Blocks per group */
+ unsigned long s_frags_per_group;/* # Fragments per group */
+ unsigned long s_inodes_per_group;/* # Inodes per group */
+ unsigned long s_mtime; /* Mount time */
+ unsigned long s_wtime; /* Write time */
+ unsigned short s_mnt_count; /* Mount count */
+ short s_max_mnt_count; /* Maximal mount count */
+ unsigned short s_magic; /* Magic signature */
+ unsigned short s_state; /* File system state */
+ unsigned short s_errors; /* Behaviour when detecting errors */
+ unsigned short s_pad;
+ unsigned long s_lastcheck; /* time of last check */
+ unsigned long s_checkinterval; /* max. time between checks */
+ unsigned long s_reserved[238]; /* Padding to the end of the block */
+};
+
+/*
+ * Structure of a directory entry
+ */
+#define EXT2_NAME_LEN 255
+
+struct ext2_dir_entry {
+ unsigned long inode; /* Inode number */
+ unsigned short rec_len; /* Directory entry length */
+ unsigned short name_len; /* Name length */
+ char name[EXT2_NAME_LEN]; /* File name */
+};
+
+/*
+ * EXT2_DIR_PAD defines the directory entries boundaries
+ *
+ * NOTE: It must be a multiple of 4
+ */
+#define EXT2_DIR_PAD 4
+#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
+#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
+ ~EXT2_DIR_ROUND)
+
+#ifdef __KERNEL__
+/*
+ * Function prototypes
+ */
+
+/*
+ * Ok, these declarations are also in <linux/kernel.h> but none of the
+ * ext2 source programs needs to include it so they are duplicated here.
+ */
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
+# define NORET_TYPE __volatile__
+# define ATTRIB_NORET /**/
+# define NORET_AND /**/
+#else
+# define NORET_TYPE /**/
+# define ATTRIB_NORET __attribute__((noreturn))
+# define NORET_AND noreturn,
+#endif
+
+/* acl.c */
+extern int ext2_permission (struct inode *, int);
+
+/* balloc.c */
+extern int ext2_new_block (struct super_block *, unsigned long,
+ unsigned long *, unsigned long *);
+extern void ext2_free_blocks (struct super_block *, unsigned long,
+ unsigned long);
+extern unsigned long ext2_count_free_blocks (struct super_block *);
+extern void ext2_check_blocks_bitmap (struct super_block *);
+
+/* bitmap.c */
+extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
+
+#ifndef DONT_USE_DCACHE
+/* dcache.c */
+extern void ext2_dcache_invalidate (unsigned short);
+extern unsigned long ext2_dcache_lookup (unsigned short, unsigned long,
+ const char *, int);
+extern void ext2_dcache_add (unsigned short, unsigned long, const char *,
+ int, unsigned long);
+extern void ext2_dcache_remove (unsigned short, unsigned long, const char *,
+ int);
+#endif
+
+/* dir.c */
+extern int ext2_check_dir_entry (char *, struct inode *,
+ struct ext2_dir_entry *, struct buffer_head *,
+ unsigned long);
+
+/* file.c */
+extern int ext2_read (struct inode *, struct file *, char *, int);
+extern int ext2_write (struct inode *, struct file *, char *, int);
+
+/* fsync.c */
+extern int ext2_sync_file (struct inode *, struct file *);
+
+/* ialloc.c */
+extern struct inode * ext2_new_inode (const struct inode *, int);
+extern void ext2_free_inode (struct inode *);
+extern unsigned long ext2_count_free_inodes (struct super_block *);
+extern void ext2_check_inodes_bitmap (struct super_block *);
+
+/* inode.c */
+extern int ext2_bmap (struct inode *, int);
+
+extern struct buffer_head * ext2_getblk (struct inode *, long, int, int *);
+extern struct buffer_head * ext2_bread (struct inode *, int, int, int *);
+
+extern int ext2_getcluster (struct inode * inode, long block);
+extern void ext2_read_inode (struct inode *);
+extern void ext2_write_inode (struct inode *);
+extern void ext2_put_inode (struct inode *);
+extern int ext2_sync_inode (struct inode *);
+extern void ext2_discard_prealloc (struct inode *);
+
+/* ioctl.c */
+extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
+ unsigned long);
+
+/* namei.c */
+extern int ext2_open (struct inode *, struct file *);
+extern void ext2_release (struct inode *, struct file *);
+extern int ext2_lookup (struct inode *,const char *, int, struct inode **);
+extern int ext2_create (struct inode *,const char *, int, int,
+ struct inode **);
+extern int ext2_mkdir (struct inode *, const char *, int, int);
+extern int ext2_rmdir (struct inode *, const char *, int);
+extern int ext2_unlink (struct inode *, const char *, int);
+extern int ext2_symlink (struct inode *, const char *, int, const char *);
+extern int ext2_link (struct inode *, struct inode *, const char *, int);
+extern int ext2_mknod (struct inode *, const char *, int, int, int);
+extern int ext2_rename (struct inode *, const char *, int,
+ struct inode *, const char *, int);
+
+/* super.c */
+extern void ext2_error (struct super_block *, const char *, const char *, ...)
+ __attribute__ ((format (printf, 3, 4)));
+extern NORET_TYPE void ext2_panic (struct super_block *, const char *,
+ const char *, ...)
+ __attribute__ ((NORET_AND format (printf, 3, 4)));
+extern void ext2_warning (struct super_block *, const char *, const char *, ...)
+ __attribute__ ((format (printf, 3, 4)));
+extern void ext2_put_super (struct super_block *);
+extern void ext2_write_super (struct super_block *);
+extern int ext2_remount (struct super_block *, int *, char *);
+extern struct super_block * ext2_read_super (struct super_block *,void *,int);
+extern void ext2_statfs (struct super_block *, struct statfs *);
+
+/* truncate.c */
+extern void ext2_truncate (struct inode *);
+
+/*
+ * Inodes and files operations
+ */
+
+/* dir.c */
+extern struct inode_operations ext2_dir_inode_operations;
+
+/* file.c */
+extern struct inode_operations ext2_file_inode_operations;
+
+/* symlink.c */
+extern struct inode_operations ext2_symlink_inode_operations;
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_EXT2_FS_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 12:27:03 +0000