Logo Search packages:      
Sourcecode: yaboot version File versions  Download package

ext2_fs.h

/*
 *  linux/include/linux/ext2_fs.h
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * 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

#include "types.h"

/*
 * The second extended filesystem constants/structures
 */

/*
 * Define EXT2FS_DEBUG to produce debug messages
 */
#undef EXT2FS_DEBUG

/*
 * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
 */
#define EXT2_PREALLOCATE
#define EXT2_DEFAULT_PREALLOC_BLOCKS      8

/*
 * The second extended file system version
 */
#define EXT2FS_DATE           "95/08/09"
#define EXT2FS_VERSION        "0.5b"

/*
 * 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 */

/* First non-reserved inode for old ext2 filesystems */
#define EXT2_GOOD_OLD_FIRST_INO     11

/*
 * The second extended file system magic number
 */
#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 (__u32))
#ifdef __KERNEL__
# define EXT2_BLOCK_SIZE_BITS(s)    ((s)->s_blocksize_bits)
#else
# define EXT2_BLOCK_SIZE_BITS(s)    ((s)->s_log_block_size + 10)
#endif
#ifdef __KERNEL__
#define     EXT2_ADDR_PER_BLOCK_BITS(s)   ((s)->u.ext2_sb.s_addr_per_block_bits)
#define EXT2_INODE_SIZE(s)          ((s)->u.ext2_sb.s_inode_size)
#define EXT2_FIRST_INO(s)           ((s)->u.ext2_sb.s_first_ino)
#else
#define EXT2_INODE_SIZE(s)    (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
                         EXT2_GOOD_OLD_INODE_SIZE : \
                         (s)->s_inode_size)
#define EXT2_FIRST_INO(s)     (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
                         EXT2_GOOD_OLD_FIRST_INO : \
                         (s)->s_first_ino)
#endif

/*
 * 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 */
{
      __u32 aclh_size;
      __u32 aclh_file_count;
      __u32 aclh_acle_count;
      __u32 aclh_first_acle;
};

struct ext2_acl_entry   /* Access Control List Entry */
{
      __u32 acle_size;
      __u16 acle_perms; /* Access permissions */
      __u16 acle_type;  /* Type of entry */
      __u16 acle_tag;   /* User or group identity */
      __u16 acle_pad1;
      __u32 acle_next;  /* Pointer on next entry for the */
                              /* same inode or on next free entry */
};

/*
 * Structure of a blocks group descriptor
 */
struct ext2_group_desc
{
      __u32 bg_block_bitmap;        /* Blocks bitmap block */
      __u32 bg_inode_bitmap;        /* Inodes bitmap block */
      __u32 bg_inode_table;         /* Inodes table block */
      __u16 bg_free_blocks_count;   /* Free blocks count */
      __u16 bg_free_inodes_count;   /* Free inodes count */
      __u16 bg_used_dirs_count;     /* Directories count */
      __u16 bg_pad;
      __u32 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)
# define EXT2_DESC_PER_BLOCK_BITS(s)      ((s)->u.ext2_sb.s_desc_per_block_bits)
#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                 0x00000001 /* Secure deletion */
#define     EXT2_UNRM_FL                  0x00000002 /* Undelete */
#define     EXT2_COMPR_FL                 0x00000004 /* Compress file */
#define EXT2_SYNC_FL                0x00000008 /* Synchronous updates */
#define EXT2_IMMUTABLE_FL           0x00000010 /* Immutable file */
#define EXT2_APPEND_FL              0x00000020 /* writes to file may only append */
#define EXT2_NODUMP_FL              0x00000040 /* do not dump file */
#define EXT2_NOATIME_FL             0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define EXT2_DIRTY_FL               0x00000100
#define EXT2_COMPRBLK_FL            0x00000200 /* One or more compressed clusters */
#define EXT2_NOCOMP_FL              0x00000400 /* Don't compress */
#define EXT2_ECOMPR_FL              0x00000800 /* Compression error */
/* End compression flags --- maybe not all used */    
#define EXT2_BTREE_FL               0x00001000 /* btree format dir */
#define EXT2_RESERVED_FL            0x80000000 /* reserved for ext2 lib */

#define EXT2_FL_USER_VISIBLE        0x00001FFF /* User visible flags */
#define EXT2_FL_USER_MODIFIABLE           0x000000FF /* User modifiable flags */

/*
 * 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 {
      __u16 i_mode;           /* File mode */
      __u16 i_uid;            /* Owner Uid */
      __u32 i_size;           /* Size in bytes */
      __u32 i_atime;    /* Access time */
      __u32 i_ctime;    /* Creation time */
      __u32 i_mtime;    /* Modification time */
      __u32 i_dtime;    /* Deletion Time */
      __u16 i_gid;            /* Group Id */
      __u16 i_links_count;    /* Links count */
      __u32 i_blocks;   /* Blocks count */
      __u32 i_flags;    /* File flags */
      union {
            struct {
                  __u32  l_i_reserved1;
            } linux1;
            struct {
                  __u32  h_i_translator;
            } hurd1;
            struct {
                  __u32  m_i_reserved1;
            } masix1;
      } osd1;                       /* OS dependent 1 */
      __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
      __u32 i_version;  /* File version (for NFS) */
      __u32 i_file_acl; /* File ACL */
      __u32 i_dir_acl;  /* Directory ACL */
      __u32 i_faddr;    /* Fragment address */
      union {
            struct {
                  __u8  l_i_frag;   /* Fragment number */
                  __u8  l_i_fsize;  /* Fragment size */
                  __u16 i_pad1;
                  __u32 l_i_reserved2[2];
            } linux2;
            struct {
                  __u8  h_i_frag;   /* Fragment number */
                  __u8  h_i_fsize;  /* Fragment size */
                  __u16 h_i_mode_high;
                  __u16 h_i_uid_high;
                  __u16 h_i_gid_high;
                  __u32 h_i_author;
            } hurd2;
            struct {
                  __u8  m_i_frag;   /* Fragment number */
                  __u8  m_i_fsize;  /* Fragment size */
                  __u16 m_pad1;
                  __u32 m_i_reserved2[2];
            } masix2;
      } osd2;                       /* OS dependent 2 */
};

#define i_size_high     i_dir_acl

#if defined(__KERNEL__) || defined(__linux__)
#define i_reserved1     osd1.linux1.l_i_reserved1
#define i_frag          osd2.linux2.l_i_frag
#define i_fsize         osd2.linux2.l_i_fsize
#define i_reserved2     osd2.linux2.l_i_reserved2
#endif

#ifdef      __hurd__
#define i_translator    osd1.hurd1.h_i_translator
#define i_frag          osd2.hurd2.h_i_frag;
#define i_fsize         osd2.hurd2.h_i_fsize;
#define i_uid_high      osd2.hurd2.h_i_uid_high
#define i_gid_high      osd2.hurd2.h_i_gid_high
#define i_author  osd2.hurd2.h_i_author
#endif

#ifdef      __masix__
#define i_reserved1     osd1.masix1.m_i_reserved1
#define i_frag          osd2.masix2.m_i_frag
#define i_fsize         osd2.masix2.m_i_fsize
#define i_reserved2     osd2.masix2.m_i_reserved2
#endif

/*
 * File system states
 */
#define     EXT2_VALID_FS                 0x0001      /* Unmounted cleanly */
#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 EXT2_MOUNT_MINIX_DF         0x0080      /* Mimics the Minix statfs */

#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 {
      __u32 s_inodes_count;         /* Inodes count */
      __u32 s_blocks_count;         /* Blocks count */
      __u32 s_r_blocks_count; /* Reserved blocks count */
      __u32 s_free_blocks_count;    /* Free blocks count */
      __u32 s_free_inodes_count;    /* Free inodes count */
      __u32 s_first_data_block;     /* First Data Block */
      __u32 s_log_block_size; /* Block size */
      __s32 s_log_frag_size;  /* Fragment size */
      __u32 s_blocks_per_group;     /* # Blocks per group */
      __u32 s_frags_per_group;      /* # Fragments per group */
      __u32 s_inodes_per_group;     /* # Inodes per group */
      __u32 s_mtime;          /* Mount time */
      __u32 s_wtime;          /* Write time */
      __u16 s_mnt_count;            /* Mount count */
      __s16 s_max_mnt_count;  /* Maximal mount count */
      __u16 s_magic;          /* Magic signature */
      __u16 s_state;          /* File system state */
      __u16 s_errors;         /* Behaviour when detecting errors */
      __u16 s_minor_rev_level;      /* minor revision level */
      __u32 s_lastcheck;            /* time of last check */
      __u32 s_checkinterval;  /* max. time between checks */
      __u32 s_creator_os;           /* OS */
      __u32 s_rev_level;            /* Revision level */
      __u16 s_def_resuid;           /* Default uid for reserved blocks */
      __u16 s_def_resgid;           /* Default gid for reserved blocks */
      /*
       * These fields are for EXT2_DYNAMIC_REV superblocks only.
       *
       * Note: the difference between the compatible feature set and
       * the incompatible feature set is that if there is a bit set
       * in the incompatible feature set that the kernel doesn't
       * know about, it should refuse to mount the filesystem.
       * 
       * e2fsck's requirements are more strict; if it doesn't know
       * about a feature in either the compatible or incompatible
       * feature set, it must abort and not try to meddle with
       * things it doesn't understand...
       */
      __u32 s_first_ino;            /* First non-reserved inode */
      __u16   s_inode_size;         /* size of inode structure */
      __u16 s_block_group_nr;       /* block group # of this superblock */
      __u32 s_feature_compat;       /* compatible feature set */
      __u32 s_feature_incompat;     /* incompatible feature set */
      __u32 s_feature_ro_compat;    /* readonly-compatible feature set */
      __u8  s_uuid[16];       /* 128-bit uuid for volume */
      char  s_volume_name[16];      /* volume name */
      char  s_last_mounted[64];     /* directory where last mounted */
      __u32 s_algorithm_usage_bitmap; /* For compression */
      /*
       * Performance hints.  Directory preallocation should only
       * happen if the EXT2_COMPAT_PREALLOC flag is on.
       */
      __u8  s_prealloc_blocks;      /* Nr of blocks to try to preallocate*/
      __u8  s_prealloc_dir_blocks;  /* Nr to preallocate for dirs */
      __u16 s_padding1;
      __u32 s_reserved[204];  /* Padding to the end of the block */
};

#ifdef __KERNEL__
#define EXT2_SB(sb)     (&((sb)->u.ext2_sb))
#else
/* Assume that user mode programs are passing in an ext2fs superblock, not
 * a kernel struct super_block.  This will allow us to call the feature-test
 * macros from user land. */
#define EXT2_SB(sb)     (sb)
#endif

/*
 * Codes for operating systems
 */
#define EXT2_OS_LINUX         0
#define EXT2_OS_HURD          1
#define EXT2_OS_MASIX         2
#define EXT2_OS_FREEBSD       3
#define EXT2_OS_LITES         4

/*
 * Revision levels
 */
#define EXT2_GOOD_OLD_REV     0     /* The good old (original) format */
#define EXT2_DYNAMIC_REV      1     /* V2 format w/ dynamic inode sizes */

#define EXT2_CURRENT_REV      EXT2_GOOD_OLD_REV
#define EXT2_MAX_SUPP_REV     EXT2_DYNAMIC_REV

#define EXT2_GOOD_OLD_INODE_SIZE 128

/*
 * Feature set definitions
 */

#define EXT2_HAS_COMPAT_FEATURE(sb,mask)              \
      ( EXT2_SB(sb)->s_feature_compat & (mask) )
#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask)                 \
      ( EXT2_SB(sb)->s_feature_ro_compat & (mask) )
#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask)                  \
      ( EXT2_SB(sb)->s_feature_incompat & (mask) )

#define EXT2_FEATURE_COMPAT_DIR_PREALLOC  0x0001

#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR  0x0004

#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT2_FEATURE_INCOMPAT_FILETYPE          0x0002

#define EXT2_FEATURE_COMPAT_SUPP    0
#define EXT2_FEATURE_INCOMPAT_SUPP  EXT2_FEATURE_INCOMPAT_FILETYPE
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
                               EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
                               EXT2_FEATURE_RO_COMPAT_BTREE_DIR)

/*
 * Default values for user and/or group using reserved blocks
 */
#define     EXT2_DEF_RESUID         0
#define     EXT2_DEF_RESGID         0

/*
 * Structure of a directory entry
 */
#define EXT2_NAME_LEN 255

struct ext2_dir_entry {
      __u32 inode;                  /* Inode number */
      __u16 rec_len;          /* Directory entry length */
      __u16 name_len;         /* Name length */
      char  name[EXT2_NAME_LEN];    /* File name */
};

/*
 * The new version of the directory entry.  Since EXT2 structures are
 * stored in intel byte order, and the name_len field could never be
 * bigger than 255 chars, it's safe to reclaim the extra byte for the
 * file_type field.
 */
struct ext2_dir_entry_2 {
      __u32 inode;                  /* Inode number */
      __u16 rec_len;          /* Directory entry length */
      __u8  name_len;         /* Name length */
      __u8  file_type;
      char  name[EXT2_NAME_LEN];    /* File name */
};

/*
 * Ext2 directory file types.  Only the low 3 bits are used.  The
 * other bits are reserved for now.
 */
#define EXT2_FT_UNKNOWN       0
#define EXT2_FT_REG_FILE      1
#define EXT2_FT_DIR           2
#define EXT2_FT_CHRDEV        3
#define EXT2_FT_BLKDEV        4
#define EXT2_FT_FIFO          5
#define EXT2_FT_SOCK          6
#define EXT2_FT_SYMLINK       7

#define EXT2_FT_MAX           8

/*
 * 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__

/* Filesize hard limits for 64-bit file offsets */
extern long long ext2_max_sizes[];

/*
 * 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.
 */
# define NORET_TYPE    /**/
# define ATTRIB_NORET  __attribute__((noreturn))
# define NORET_AND     noreturn,

/* acl.c */
extern int ext2_permission (struct inode *, int);

/* balloc.c */
extern int ext2_group_sparse(int group);
extern int ext2_new_block (const struct inode *, unsigned long,
                     __u32 *, __u32 *, int *);
extern void ext2_free_blocks (const struct inode *, unsigned long,
                        unsigned long);
extern unsigned long ext2_count_free_blocks (struct super_block *);
extern void ext2_check_blocks_bitmap (struct super_block *);
extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
                                        unsigned int block_group,
                                        struct buffer_head ** bh);

/* bitmap.c */
extern unsigned long ext2_count_free (struct buffer_head *, unsigned);

/* dir.c */
extern int ext2_check_dir_entry (const char *, struct inode *,
                         struct ext2_dir_entry_2 *, 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 file *, struct dentry *);

/* ialloc.c */
extern struct inode * ext2_new_inode (const struct inode *, int, 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 void ext2_delete_inode (struct inode *);
extern int ext2_sync_inode (struct inode *);
extern int ext2_notify_change(struct dentry *, struct iattr *);
extern void ext2_discard_prealloc (struct inode *);

/* ioctl.c */
extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
                   unsigned long);

/* namei.c */
extern void ext2_release (struct inode *, struct file *);
extern struct dentry *ext2_lookup (struct inode *, struct dentry *);
extern int ext2_create (struct inode *,struct dentry *,int);
extern int ext2_mkdir (struct inode *,struct dentry *,int);
extern int ext2_rmdir (struct inode *,struct dentry *);
extern int ext2_unlink (struct inode *,struct dentry *);
extern int ext2_symlink (struct inode *,struct dentry *,const char *);
extern int ext2_link (struct dentry *, struct inode *, struct dentry *);
extern int ext2_mknod (struct inode *, struct dentry *, int, int);
extern int ext2_rename (struct inode *, struct dentry *,
                  struct inode *, struct dentry *);

/* 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 int init_ext2_fs(void);
extern int ext2_statfs (struct super_block *, struct statfs *, int);

/* 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  Doxygen 1.6.0   Back to index