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[PATCH] ext4: initial copy of files from ext3
Start of the ext4 patch series. See Documentation/filesystems/ext4.txt for details. This is a simple copy of the files in fs/ext3 to fs/ext4 and /usr/incude/linux/ext3* to /usr/include/ex4* Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Kleikamp
committed by
Linus Torvalds
Linus Torvalds
parent
502717f4e1
commit
ac27a0ec11
File diff suppressed because it is too large
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@@ -0,0 +1,147 @@
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/*
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* linux/include/linux/ext3_fs_i.h
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/include/linux/minix_fs_i.h
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef _LINUX_EXT3_FS_I
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#define _LINUX_EXT3_FS_I
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#include <linux/rwsem.h>
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#include <linux/rbtree.h>
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#include <linux/seqlock.h>
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#include <linux/mutex.h>
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/* data type for block offset of block group */
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typedef int ext3_grpblk_t;
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/* data type for filesystem-wide blocks number */
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typedef unsigned long ext3_fsblk_t;
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#define E3FSBLK "%lu"
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struct ext3_reserve_window {
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ext3_fsblk_t _rsv_start; /* First byte reserved */
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ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */
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};
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struct ext3_reserve_window_node {
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struct rb_node rsv_node;
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__u32 rsv_goal_size;
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__u32 rsv_alloc_hit;
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struct ext3_reserve_window rsv_window;
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};
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struct ext3_block_alloc_info {
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/* information about reservation window */
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struct ext3_reserve_window_node rsv_window_node;
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/*
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* was i_next_alloc_block in ext3_inode_info
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* is the logical (file-relative) number of the
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* most-recently-allocated block in this file.
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* We use this for detecting linearly ascending allocation requests.
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*/
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__u32 last_alloc_logical_block;
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/*
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* Was i_next_alloc_goal in ext3_inode_info
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* is the *physical* companion to i_next_alloc_block.
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* it the the physical block number of the block which was most-recentl
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* allocated to this file. This give us the goal (target) for the next
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* allocation when we detect linearly ascending requests.
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*/
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ext3_fsblk_t last_alloc_physical_block;
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};
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#define rsv_start rsv_window._rsv_start
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#define rsv_end rsv_window._rsv_end
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/*
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* third extended file system inode data in memory
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*/
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struct ext3_inode_info {
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__le32 i_data[15]; /* unconverted */
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__u32 i_flags;
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#ifdef EXT3_FRAGMENTS
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__u32 i_faddr;
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__u8 i_frag_no;
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__u8 i_frag_size;
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#endif
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ext3_fsblk_t i_file_acl;
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__u32 i_dir_acl;
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__u32 i_dtime;
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/*
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* i_block_group is the number of the block group which contains
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* this file's inode. Constant across the lifetime of the inode,
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* it is ued for making block allocation decisions - we try to
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* place a file's data blocks near its inode block, and new inodes
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* near to their parent directory's inode.
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*/
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__u32 i_block_group;
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__u32 i_state; /* Dynamic state flags for ext3 */
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/* block reservation info */
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struct ext3_block_alloc_info *i_block_alloc_info;
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__u32 i_dir_start_lookup;
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#ifdef CONFIG_EXT3_FS_XATTR
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/*
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* Extended attributes can be read independently of the main file
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* data. Taking i_mutex even when reading would cause contention
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* between readers of EAs and writers of regular file data, so
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* instead we synchronize on xattr_sem when reading or changing
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* EAs.
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*/
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struct rw_semaphore xattr_sem;
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#endif
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#ifdef CONFIG_EXT3_FS_POSIX_ACL
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struct posix_acl *i_acl;
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struct posix_acl *i_default_acl;
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#endif
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struct list_head i_orphan; /* unlinked but open inodes */
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/*
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* i_disksize keeps track of what the inode size is ON DISK, not
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* in memory. During truncate, i_size is set to the new size by
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* the VFS prior to calling ext3_truncate(), but the filesystem won't
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* set i_disksize to 0 until the truncate is actually under way.
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*
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* The intent is that i_disksize always represents the blocks which
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* are used by this file. This allows recovery to restart truncate
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* on orphans if we crash during truncate. We actually write i_disksize
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* into the on-disk inode when writing inodes out, instead of i_size.
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*
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* The only time when i_disksize and i_size may be different is when
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* a truncate is in progress. The only things which change i_disksize
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* are ext3_get_block (growth) and ext3_truncate (shrinkth).
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*/
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loff_t i_disksize;
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/* on-disk additional length */
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__u16 i_extra_isize;
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/*
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* truncate_mutex is for serialising ext3_truncate() against
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* ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's
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* data tree are chopped off during truncate. We can't do that in
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* ext3 because whenever we perform intermediate commits during
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* truncate, the inode and all the metadata blocks *must* be in a
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* consistent state which allows truncation of the orphans to restart
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* during recovery. Hence we must fix the get_block-vs-truncate race
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* by other means, so we have truncate_mutex.
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*/
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struct mutex truncate_mutex;
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struct inode vfs_inode;
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};
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#endif /* _LINUX_EXT3_FS_I */
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@@ -0,0 +1,83 @@
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/*
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* linux/include/linux/ext3_fs_sb.h
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/include/linux/minix_fs_sb.h
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef _LINUX_EXT3_FS_SB
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#define _LINUX_EXT3_FS_SB
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#ifdef __KERNEL__
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#include <linux/timer.h>
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#include <linux/wait.h>
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#include <linux/blockgroup_lock.h>
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#include <linux/percpu_counter.h>
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#endif
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#include <linux/rbtree.h>
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/*
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* third extended-fs super-block data in memory
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*/
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struct ext3_sb_info {
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unsigned long s_frag_size; /* Size of a fragment in bytes */
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unsigned long s_frags_per_block;/* Number of fragments per block */
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unsigned long s_inodes_per_block;/* Number of inodes per block */
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unsigned long s_frags_per_group;/* Number of fragments in a group */
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unsigned long s_blocks_per_group;/* Number of blocks in a group */
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unsigned long s_inodes_per_group;/* Number of inodes in a group */
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unsigned long s_itb_per_group; /* Number of inode table blocks per group */
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unsigned long s_gdb_count; /* Number of group descriptor blocks */
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unsigned long s_desc_per_block; /* Number of group descriptors per block */
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unsigned long s_groups_count; /* Number of groups in the fs */
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struct buffer_head * s_sbh; /* Buffer containing the super block */
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struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */
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struct buffer_head ** s_group_desc;
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unsigned long s_mount_opt;
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uid_t s_resuid;
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gid_t s_resgid;
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unsigned short s_mount_state;
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unsigned short s_pad;
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int s_addr_per_block_bits;
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int s_desc_per_block_bits;
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int s_inode_size;
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int s_first_ino;
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spinlock_t s_next_gen_lock;
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u32 s_next_generation;
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u32 s_hash_seed[4];
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int s_def_hash_version;
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struct percpu_counter s_freeblocks_counter;
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struct percpu_counter s_freeinodes_counter;
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struct percpu_counter s_dirs_counter;
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struct blockgroup_lock s_blockgroup_lock;
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/* root of the per fs reservation window tree */
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spinlock_t s_rsv_window_lock;
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struct rb_root s_rsv_window_root;
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struct ext3_reserve_window_node s_rsv_window_head;
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/* Journaling */
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struct inode * s_journal_inode;
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struct journal_s * s_journal;
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struct list_head s_orphan;
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unsigned long s_commit_interval;
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struct block_device *journal_bdev;
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#ifdef CONFIG_JBD_DEBUG
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struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
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wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
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#endif
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#ifdef CONFIG_QUOTA
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char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */
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int s_jquota_fmt; /* Format of quota to use */
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#endif
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};
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#endif /* _LINUX_EXT3_FS_SB */
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@@ -0,0 +1,268 @@
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/*
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* linux/include/linux/ext3_jbd.h
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*
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* Written by Stephen C. Tweedie <sct@redhat.com>, 1999
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*
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* Copyright 1998--1999 Red Hat corp --- All Rights Reserved
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*
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* This file is part of the Linux kernel and is made available under
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* the terms of the GNU General Public License, version 2, or at your
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* option, any later version, incorporated herein by reference.
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*
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* Ext3-specific journaling extensions.
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*/
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#ifndef _LINUX_EXT3_JBD_H
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#define _LINUX_EXT3_JBD_H
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#include <linux/fs.h>
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#include <linux/jbd.h>
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#include <linux/ext3_fs.h>
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#define EXT3_JOURNAL(inode) (EXT3_SB((inode)->i_sb)->s_journal)
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/* Define the number of blocks we need to account to a transaction to
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* modify one block of data.
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*
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* We may have to touch one inode, one bitmap buffer, up to three
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* indirection blocks, the group and superblock summaries, and the data
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* block to complete the transaction. */
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#define EXT3_SINGLEDATA_TRANS_BLOCKS 8U
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/* Extended attribute operations touch at most two data buffers,
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* two bitmap buffers, and two group summaries, in addition to the inode
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* and the superblock, which are already accounted for. */
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#define EXT3_XATTR_TRANS_BLOCKS 6U
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/* Define the minimum size for a transaction which modifies data. This
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* needs to take into account the fact that we may end up modifying two
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* quota files too (one for the group, one for the user quota). The
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* superblock only gets updated once, of course, so don't bother
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* counting that again for the quota updates. */
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#define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \
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EXT3_XATTR_TRANS_BLOCKS - 2 + \
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2*EXT3_QUOTA_TRANS_BLOCKS(sb))
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/* Delete operations potentially hit one directory's namespace plus an
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* entire inode, plus arbitrary amounts of bitmap/indirection data. Be
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* generous. We can grow the delete transaction later if necessary. */
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#define EXT3_DELETE_TRANS_BLOCKS(sb) (2 * EXT3_DATA_TRANS_BLOCKS(sb) + 64)
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/* Define an arbitrary limit for the amount of data we will anticipate
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* writing to any given transaction. For unbounded transactions such as
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* write(2) and truncate(2) we can write more than this, but we always
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* start off at the maximum transaction size and grow the transaction
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* optimistically as we go. */
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#define EXT3_MAX_TRANS_DATA 64U
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/* We break up a large truncate or write transaction once the handle's
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* buffer credits gets this low, we need either to extend the
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* transaction or to start a new one. Reserve enough space here for
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* inode, bitmap, superblock, group and indirection updates for at least
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* one block, plus two quota updates. Quota allocations are not
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* needed. */
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#define EXT3_RESERVE_TRANS_BLOCKS 12U
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#define EXT3_INDEX_EXTRA_TRANS_BLOCKS 8
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#ifdef CONFIG_QUOTA
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/* Amount of blocks needed for quota update - we know that the structure was
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* allocated so we need to update only inode+data */
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#define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
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/* Amount of blocks needed for quota insert/delete - we do some block writes
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* but inode, sb and group updates are done only once */
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#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
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(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
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#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
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(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
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#else
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#define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
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#define EXT3_QUOTA_INIT_BLOCKS(sb) 0
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#define EXT3_QUOTA_DEL_BLOCKS(sb) 0
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#endif
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int
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ext3_mark_iloc_dirty(handle_t *handle,
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struct inode *inode,
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struct ext3_iloc *iloc);
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/*
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* On success, We end up with an outstanding reference count against
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* iloc->bh. This _must_ be cleaned up later.
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*/
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int ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
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struct ext3_iloc *iloc);
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int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode);
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/*
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* Wrapper functions with which ext3 calls into JBD. The intent here is
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* to allow these to be turned into appropriate stubs so ext3 can control
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* ext2 filesystems, so ext2+ext3 systems only nee one fs. This work hasn't
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* been done yet.
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*/
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void ext3_journal_abort_handle(const char *caller, const char *err_fn,
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struct buffer_head *bh, handle_t *handle, int err);
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static inline int
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__ext3_journal_get_undo_access(const char *where, handle_t *handle,
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struct buffer_head *bh)
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{
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int err = journal_get_undo_access(handle, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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static inline int
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__ext3_journal_get_write_access(const char *where, handle_t *handle,
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struct buffer_head *bh)
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{
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int err = journal_get_write_access(handle, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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static inline void
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ext3_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
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{
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journal_release_buffer(handle, bh);
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}
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static inline int
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__ext3_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh)
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{
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int err = journal_forget(handle, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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static inline int
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__ext3_journal_revoke(const char *where, handle_t *handle,
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unsigned long blocknr, struct buffer_head *bh)
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{
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int err = journal_revoke(handle, blocknr, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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static inline int
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__ext3_journal_get_create_access(const char *where,
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handle_t *handle, struct buffer_head *bh)
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{
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int err = journal_get_create_access(handle, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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static inline int
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__ext3_journal_dirty_metadata(const char *where,
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handle_t *handle, struct buffer_head *bh)
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{
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int err = journal_dirty_metadata(handle, bh);
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if (err)
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ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
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return err;
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}
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#define ext3_journal_get_undo_access(handle, bh) \
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__ext3_journal_get_undo_access(__FUNCTION__, (handle), (bh))
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#define ext3_journal_get_write_access(handle, bh) \
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__ext3_journal_get_write_access(__FUNCTION__, (handle), (bh))
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#define ext3_journal_revoke(handle, blocknr, bh) \
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__ext3_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh))
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#define ext3_journal_get_create_access(handle, bh) \
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__ext3_journal_get_create_access(__FUNCTION__, (handle), (bh))
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#define ext3_journal_dirty_metadata(handle, bh) \
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__ext3_journal_dirty_metadata(__FUNCTION__, (handle), (bh))
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#define ext3_journal_forget(handle, bh) \
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__ext3_journal_forget(__FUNCTION__, (handle), (bh))
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int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
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handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks);
|
||||
int __ext3_journal_stop(const char *where, handle_t *handle);
|
||||
|
||||
static inline handle_t *ext3_journal_start(struct inode *inode, int nblocks)
|
||||
{
|
||||
return ext3_journal_start_sb(inode->i_sb, nblocks);
|
||||
}
|
||||
|
||||
#define ext3_journal_stop(handle) \
|
||||
__ext3_journal_stop(__FUNCTION__, (handle))
|
||||
|
||||
static inline handle_t *ext3_journal_current_handle(void)
|
||||
{
|
||||
return journal_current_handle();
|
||||
}
|
||||
|
||||
static inline int ext3_journal_extend(handle_t *handle, int nblocks)
|
||||
{
|
||||
return journal_extend(handle, nblocks);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_restart(handle_t *handle, int nblocks)
|
||||
{
|
||||
return journal_restart(handle, nblocks);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_blocks_per_page(struct inode *inode)
|
||||
{
|
||||
return journal_blocks_per_page(inode);
|
||||
}
|
||||
|
||||
static inline int ext3_journal_force_commit(journal_t *journal)
|
||||
{
|
||||
return journal_force_commit(journal);
|
||||
}
|
||||
|
||||
/* super.c */
|
||||
int ext3_force_commit(struct super_block *sb);
|
||||
|
||||
static inline int ext3_should_journal_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 1;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
|
||||
return 1;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int ext3_should_order_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 0;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 0;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int ext3_should_writeback_data(struct inode *inode)
|
||||
{
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return 0;
|
||||
if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL)
|
||||
return 0;
|
||||
if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* _LINUX_EXT3_JBD_H */
|
||||
Reference in New Issue
Block a user