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[PATCH] ext3 and jbd cleanup: remove whitespace 

Remove whitespace from ext3 and jbd, before we clone ext4.

Signed-off-by: Mingming Cao<cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mingming Cao 2006-09-27 01:49:27 -07:00 committed by Linus Torvalds
parent e7ab8d6505
commit ae6ddcc5f2
17 changed files with 307 additions and 307 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
fs/ext3/balloc.c
View File

@ -74,7 +74,7 @@ struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
}
/*
* Read the bitmap for a given block_group, reading into the specified
* Read the bitmap for a given block_group, reading into the specified
* slot in the superblock's bitmap cache.
*
* Return buffer_head on success or NULL in case of failure.
@ -419,8 +419,8 @@ void ext3_free_blocks_sb(handle_t *handle, struct super_block *sb,
}
/* @@@ This prevents newly-allocated data from being
* freed and then reallocated within the same
* transaction.
*
* transaction.
*
* Ideally we would want to allow that to happen, but to
* do so requires making journal_forget() capable of
* revoking the queued write of a data block, which
@ -433,7 +433,7 @@ void ext3_free_blocks_sb(handle_t *handle, struct super_block *sb,
* safe not to set the allocation bit in the committed
* bitmap, because we know that there is no outstanding
* activity on the buffer any more and so it is safe to
* reallocate it.
* reallocate it.
*/
BUFFER_TRACE(bitmap_bh, "set in b_committed_data");
J_ASSERT_BH(bitmap_bh,
@ -518,7 +518,7 @@ void ext3_free_blocks(handle_t *handle, struct inode *inode,
* data would allow the old block to be overwritten before the
* transaction committed (because we force data to disk before commit).
* This would lead to corruption if we crashed between overwriting the
* data and committing the delete.
* data and committing the delete.
*
* @@@ We may want to make this allocation behaviour conditional on
* data-writes at some point, and disable it for metadata allocations or
@ -584,7 +584,7 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
if (start > 0) {
/*
* The goal was occupied; search forward for a free
* The goal was occupied; search forward for a free
* block within the next XX blocks.
*
* end_goal is more or less random, but it has to be
@ -1194,7 +1194,7 @@ int ext3_should_retry_alloc(struct super_block *sb, int *retries)
/*
* ext3_new_block uses a goal block to assist allocation. If the goal is
* free, or there is a free block within 32 blocks of the goal, that block
* is allocated. Otherwise a forward search is made for a free block; within
* is allocated. Otherwise a forward search is made for a free block; within
* each block group the search first looks for an entire free byte in the block
* bitmap, and then for any free bit if that fails.
* This function also updates quota and i_blocks field.
@ -1303,7 +1303,7 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
smp_rmb();
/*
* Now search the rest of the groups. We assume that
* Now search the rest of the groups. We assume that
* i and gdp correctly point to the last group visited.
*/
for (bgi = 0; bgi < ngroups; bgi++) {

2
fs/ext3/bitmap.c
View File

@ -20,7 +20,7 @@ unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars)
unsigned int i;
unsigned long sum = 0;
if (!map)
if (!map)
return (0);
for (i = 0; i < numchars; i++)
sum += nibblemap[map->b_data[i] & 0xf] +

14
fs/ext3/dir.c
View File

@ -59,7 +59,7 @@ static unsigned char get_dtype(struct super_block *sb, int filetype)
return (ext3_filetype_table[filetype]);
}
int ext3_check_dir_entry (const char * function, struct inode * dir,
struct ext3_dir_entry_2 * de,
@ -162,7 +162,7 @@ static int ext3_readdir(struct file * filp,
* to make sure. */
if (filp->f_version != inode->i_version) {
for (i = 0; i < sb->s_blocksize && i < offset; ) {
de = (struct ext3_dir_entry_2 *)
de = (struct ext3_dir_entry_2 *)
(bh->b_data + i);
/* It's too expensive to do a full
* dirent test each time round this
@ -181,7 +181,7 @@ static int ext3_readdir(struct file * filp,
filp->f_version = inode->i_version;
}
while (!error && filp->f_pos < inode->i_size
while (!error && filp->f_pos < inode->i_size
&& offset < sb->s_blocksize) {
de = (struct ext3_dir_entry_2 *) (bh->b_data + offset);
if (!ext3_check_dir_entry ("ext3_readdir", inode, de,
@ -229,7 +229,7 @@ static int ext3_readdir(struct file * filp,
/*
* These functions convert from the major/minor hash to an f_pos
* value.
*
*
* Currently we only use major hash numer. This is unfortunate, but
* on 32-bit machines, the same VFS interface is used for lseek and
* llseek, so if we use the 64 bit offset, then the 32-bit versions of
@ -250,7 +250,7 @@ static int ext3_readdir(struct file * filp,
struct fname {
__u32 hash;
__u32 minor_hash;
struct rb_node rb_hash;
struct rb_node rb_hash;
struct fname *next;
__u32 inode;
__u8 name_len;
@ -410,7 +410,7 @@ static int call_filldir(struct file * filp, void * dirent,
curr_pos = hash2pos(fname->hash, fname->minor_hash);
while (fname) {
error = filldir(dirent, fname->name,
fname->name_len, curr_pos,
fname->name_len, curr_pos,
fname->inode,
get_dtype(sb, fname->file_type));
if (error) {
@ -465,7 +465,7 @@ static int ext3_dx_readdir(struct file * filp,
/*
* Fill the rbtree if we have no more entries,
* or the inode has changed since we last read in the
* cached entries.
* cached entries.
*/
if ((!info->curr_node) ||
(filp->f_version != inode->i_version)) {

2
fs/ext3/file.c
View File

@ -100,7 +100,7 @@ ext3_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t
force_commit:
err = ext3_force_commit(inode->i_sb);
if (err)
if (err)
return err;
return ret;
}

6
fs/ext3/fsync.c
View File

@ -8,14 +8,14 @@
* Universite Pierre et Marie Curie (Paris VI)
* from
* linux/fs/minix/truncate.c Copyright (C) 1991, 1992 Linus Torvalds
*
*
* ext3fs fsync primitive
*
* Big-endian to little-endian byte-swapping/bitmaps by
* David S. Miller (davem@caip.rutgers.edu), 1995
*
*
* Removed unnecessary code duplication for little endian machines
* and excessive __inline__s.
* and excessive __inline__s.
* Andi Kleen, 1997
*
* Major simplications and cleanup - we only need to do the metadata, because

6
fs/ext3/hash.c
View File

@ -4,7 +4,7 @@
* Copyright (C) 2002 by Theodore Ts'o
*
* This file is released under the GPL v2.
*
*
* This file may be redistributed under the terms of the GNU Public
* License.
*/
@ -80,11 +80,11 @@ static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
* Returns the hash of a filename. If len is 0 and name is NULL, then
* this function can be used to test whether or not a hash version is
* supported.
*
*
* The seed is an 4 longword (32 bits) "secret" which can be used to
* uniquify a hash. If the seed is all zero's, then some default seed
* may be used.
*
*
* A particular hash version specifies whether or not the seed is
* represented, and whether or not the returned hash is 32 bits or 64
* bits. 32 bit hashes will return 0 for the minor hash.

48
fs/ext3/ialloc.c
View File

@ -216,7 +216,7 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
continue;
if (le16_to_cpu(desc->bg_free_inodes_count) < avefreei)
continue;
if (!best_desc ||
if (!best_desc ||
(le16_to_cpu(desc->bg_free_blocks_count) >
le16_to_cpu(best_desc->bg_free_blocks_count))) {
best_group = group;
@ -226,30 +226,30 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
return best_group;
}
/*
* Orlov's allocator for directories.
*
/*
* Orlov's allocator for directories.
*
* We always try to spread first-level directories.
*
* If there are blockgroups with both free inodes and free blocks counts
* not worse than average we return one with smallest directory count.
* Otherwise we simply return a random group.
*
* For the rest rules look so:
*
* It's OK to put directory into a group unless
* it has too many directories already (max_dirs) or
* it has too few free inodes left (min_inodes) or
* it has too few free blocks left (min_blocks) or
* it's already running too large debt (max_debt).
* Parent's group is prefered, if it doesn't satisfy these
* conditions we search cyclically through the rest. If none
* of the groups look good we just look for a group with more
* free inodes than average (starting at parent's group).
*
* Debt is incremented each time we allocate a directory and decremented
* when we allocate an inode, within 0--255.
*/
* If there are blockgroups with both free inodes and free blocks counts
* not worse than average we return one with smallest directory count.
* Otherwise we simply return a random group.
*
* For the rest rules look so:
*
* It's OK to put directory into a group unless
* it has too many directories already (max_dirs) or
* it has too few free inodes left (min_inodes) or
* it has too few free blocks left (min_blocks) or
* it's already running too large debt (max_debt).
* Parent's group is prefered, if it doesn't satisfy these
* conditions we search cyclically through the rest. If none
* of the groups look good we just look for a group with more
* free inodes than average (starting at parent's group).
*
* Debt is incremented each time we allocate a directory and decremented
* when we allocate an inode, within 0--255.
*/
#define INODE_COST 64
#define BLOCK_COST 256
@ -454,7 +454,7 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
group = find_group_dir(sb, dir);
else
group = find_group_orlov(sb, dir);
} else
} else
group = find_group_other(sb, dir);
err = -ENOSPC;

64
fs/ext3/inode.c
View File

@ -55,7 +55,7 @@ static int ext3_inode_is_fast_symlink(struct inode *inode)
/*
* The ext3 forget function must perform a revoke if we are freeing data
* which has been journaled. Metadata (eg. indirect blocks) must be
* revoked in all cases.
* revoked in all cases.
*
* "bh" may be NULL: a metadata block may have been freed from memory
* but there may still be a record of it in the journal, and that record
@ -105,7 +105,7 @@ int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
* Work out how many blocks we need to proceed with the next chunk of a
* truncate transaction.
*/
static unsigned long blocks_for_truncate(struct inode *inode)
static unsigned long blocks_for_truncate(struct inode *inode)
{
unsigned long needed;
@ -122,13 +122,13 @@ static unsigned long blocks_for_truncate(struct inode *inode)
/* But we need to bound the transaction so we don't overflow the
* journal. */
if (needed > EXT3_MAX_TRANS_DATA)
if (needed > EXT3_MAX_TRANS_DATA)
needed = EXT3_MAX_TRANS_DATA;
return EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
}
/*
/*
* Truncate transactions can be complex and absolutely huge. So we need to
* be able to restart the transaction at a conventient checkpoint to make
* sure we don't overflow the journal.
@ -136,9 +136,9 @@ static unsigned long blocks_for_truncate(struct inode *inode)
* start_transaction gets us a new handle for a truncate transaction,
* and extend_transaction tries to extend the existing one a bit. If
* extend fails, we need to propagate the failure up and restart the
* transaction in the top-level truncate loop. --sct
* transaction in the top-level truncate loop. --sct
*/
static handle_t *start_transaction(struct inode *inode)
static handle_t *start_transaction(struct inode *inode)
{
handle_t *result;
@ -215,12 +215,12 @@ void ext3_delete_inode (struct inode * inode)
ext3_orphan_del(handle, inode);
EXT3_I(inode)->i_dtime = get_seconds();
/*
/*
* One subtle ordering requirement: if anything has gone wrong
* (transaction abort, IO errors, whatever), then we can still
* do these next steps (the fs will already have been marked as
* having errors), but we can't free the inode if the mark_dirty
* fails.
* fails.
*/
if (ext3_mark_inode_dirty(handle, inode))
/* If that failed, just do the required in-core inode clear. */
@ -398,7 +398,7 @@ static Indirect *ext3_get_branch(struct inode *inode, int depth, int *offsets,
* + if there is a block to the left of our position - allocate near it.
* + if pointer will live in indirect block - allocate near that block.
* + if pointer will live in inode - allocate in the same
* cylinder group.
* cylinder group.
*
* In the latter case we colour the starting block by the callers PID to
* prevent it from clashing with concurrent allocations for a different inode
@ -744,7 +744,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
jbd_debug(5, "splicing indirect only\n");
BUFFER_TRACE(where->bh, "call ext3_journal_dirty_metadata");
err = ext3_journal_dirty_metadata(handle, where->bh);
if (err)
if (err)
goto err_out;
} else {
/*
@ -1137,7 +1137,7 @@ static int walk_page_buffers( handle_t *handle,
* So what we do is to rely on the fact that journal_stop/journal_start
* will _not_ run commit under these circumstances because handle->h_ref
* is elevated. We'll still have enough credits for the tiny quotafile
* write.
* write.
*/
static int do_journal_get_write_access(handle_t *handle,
struct buffer_head *bh)
@ -1282,7 +1282,7 @@ static int ext3_journalled_commit_write(struct file *file,
if (inode->i_size > EXT3_I(inode)->i_disksize) {
EXT3_I(inode)->i_disksize = inode->i_size;
ret2 = ext3_mark_inode_dirty(handle, inode);
if (!ret)
if (!ret)
ret = ret2;
}
ret2 = ext3_journal_stop(handle);
@ -1291,7 +1291,7 @@ static int ext3_journalled_commit_write(struct file *file,
return ret;
}
/*
/*
* bmap() is special. It gets used by applications such as lilo and by
* the swapper to find the on-disk block of a specific piece of data.
*
@ -1300,10 +1300,10 @@ static int ext3_journalled_commit_write(struct file *file,
* filesystem and enables swap, then they may get a nasty shock when the
* data getting swapped to that swapfile suddenly gets overwritten by
* the original zero's written out previously to the journal and
* awaiting writeback in the kernel's buffer cache.
* awaiting writeback in the kernel's buffer cache.
*
* So, if we see any bmap calls here on a modified, data-journaled file,
* take extra steps to flush any blocks which might be in the cache.
* take extra steps to flush any blocks which might be in the cache.
*/
static sector_t ext3_bmap(struct address_space *mapping, sector_t block)
{
@ -1312,16 +1312,16 @@ static sector_t ext3_bmap(struct address_space *mapping, sector_t block)
int err;
if (EXT3_I(inode)->i_state & EXT3_STATE_JDATA) {
/*
/*
* This is a REALLY heavyweight approach, but the use of
* bmap on dirty files is expected to be extremely rare:
* only if we run lilo or swapon on a freshly made file
* do we expect this to happen.
* do we expect this to happen.
*
* (bmap requires CAP_SYS_RAWIO so this does not
* represent an unprivileged user DOS attack --- we'd be
* in trouble if mortal users could trigger this path at
* will.)
* will.)
*
* NB. EXT3_STATE_JDATA is not set on files other than
* regular files. If somebody wants to bmap a directory
@ -1457,7 +1457,7 @@ static int ext3_ordered_writepage(struct page *page,
*/
/*
* And attach them to the current transaction. But only if
* And attach them to the current transaction. But only if
* block_write_full_page() succeeded. Otherwise they are unmapped,
* and generally junk.
*/
@ -1644,7 +1644,7 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
}
}
ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
offset, nr_segs,
ext3_get_block, NULL);
@ -2025,7 +2025,7 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
__le32 *first, __le32 *last)
{
ext3_fsblk_t block_to_free = 0; /* Starting block # of a run */
unsigned long count = 0; /* Number of blocks in the run */
unsigned long count = 0; /* Number of blocks in the run */
__le32 *block_to_free_p = NULL; /* Pointer into inode/ind
corresponding to
block_to_free */
@ -2054,7 +2054,7 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
} else if (nr == block_to_free + count) {
count++;
} else {
ext3_clear_blocks(handle, inode, this_bh,
ext3_clear_blocks(handle, inode, this_bh,
block_to_free,
count, block_to_free_p, p);
block_to_free = nr;
@ -2184,7 +2184,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
*p = 0;
BUFFER_TRACE(parent_bh,
"call ext3_journal_dirty_metadata");
ext3_journal_dirty_metadata(handle,
ext3_journal_dirty_metadata(handle,
parent_bh);
}
}
@ -2704,7 +2704,7 @@ void ext3_read_inode(struct inode * inode)
if (raw_inode->i_block[0])
init_special_inode(inode, inode->i_mode,
old_decode_dev(le32_to_cpu(raw_inode->i_block[0])));
else
else
init_special_inode(inode, inode->i_mode,
new_decode_dev(le32_to_cpu(raw_inode->i_block[1])));
}
@ -2724,8 +2724,8 @@ void ext3_read_inode(struct inode * inode)
*
* The caller must have write access to iloc->bh.
*/
static int ext3_do_update_inode(handle_t *handle,
struct inode *inode,
static int ext3_do_update_inode(handle_t *handle,
struct inode *inode,
struct ext3_iloc *iloc)
{
struct ext3_inode *raw_inode = ext3_raw_inode(iloc);
@ -2900,7 +2900,7 @@ int ext3_write_inode(struct inode *inode, int wait)
* commit will leave the blocks being flushed in an unused state on
* disk. (On recovery, the inode will get truncated and the blocks will
* be freed, so we have a strong guarantee that no future commit will
* leave these blocks visible to the user.)
* leave these blocks visible to the user.)
*
* Called with inode->sem down.
*/
@ -3043,13 +3043,13 @@ int ext3_mark_iloc_dirty(handle_t *handle,
return err;
}
/*
/*
* On success, We end up with an outstanding reference count against
* iloc->bh. This _must_ be cleaned up later.
* iloc->bh. This _must_ be cleaned up later.
*/
int
ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
struct ext3_iloc *iloc)
{
int err = 0;
@ -3139,7 +3139,7 @@ void ext3_dirty_inode(struct inode *inode)
}
#if 0
/*
/*
* Bind an inode's backing buffer_head into this transaction, to prevent
* it from being flushed to disk early. Unlike
* ext3_reserve_inode_write, this leaves behind no bh reference and
@ -3157,7 +3157,7 @@ static int ext3_pin_inode(handle_t *handle, struct inode *inode)
BUFFER_TRACE(iloc.bh, "get_write_access");
err = journal_get_write_access(handle, iloc.bh);
if (!err)
err = ext3_journal_dirty_metadata(handle,
err = ext3_journal_dirty_metadata(handle,
iloc.bh);
brelse(iloc.bh);
}

28
fs/ext3/namei.c
View File

@ -76,7 +76,7 @@ static struct buffer_head *ext3_append(handle_t *handle,
#ifdef DX_DEBUG
#define dxtrace(command) command
#else
#define dxtrace(command)
#define dxtrace(command)
#endif
struct fake_dirent
@ -169,7 +169,7 @@ static struct ext3_dir_entry_2* dx_pack_dirents (char *base, int size);
static void dx_insert_block (struct dx_frame *frame, u32 hash, u32 block);
static int ext3_htree_next_block(struct inode *dir, __u32 hash,
struct dx_frame *frame,
struct dx_frame *frames,
struct dx_frame *frames,
__u32 *start_hash);
static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
struct ext3_dir_entry_2 **res_dir, int *err);
@ -250,7 +250,7 @@ static void dx_show_index (char * label, struct dx_entry *entries)
}
struct stats
{
{
unsigned names;
unsigned space;
unsigned bcount;
@ -464,7 +464,7 @@ static void dx_release (struct dx_frame *frames)
*/
static int ext3_htree_next_block(struct inode *dir, __u32 hash,
struct dx_frame *frame,
struct dx_frame *frames,
struct dx_frame *frames,
__u32 *start_hash)
{
struct dx_frame *p;
@ -632,7 +632,7 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
}
count += ret;
hashval = ~0;
ret = ext3_htree_next_block(dir, HASH_NB_ALWAYS,
ret = ext3_htree_next_block(dir, HASH_NB_ALWAYS,
frame, frames, &hashval);
*next_hash = hashval;
if (ret < 0) {
@ -649,7 +649,7 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
break;
}
dx_release(frames);
dxtrace(printk("Fill tree: returned %d entries, next hash: %x\n",
dxtrace(printk("Fill tree: returned %d entries, next hash: %x\n",
count, *next_hash));
return count;
errout:
@ -1050,7 +1050,7 @@ struct dentry *ext3_get_parent(struct dentry *child)
parent = ERR_PTR(-ENOMEM);
}
return parent;
}
}
#define S_SHIFT 12
static unsigned char ext3_type_by_mode[S_IFMT >> S_SHIFT] = {
@ -1198,7 +1198,7 @@ static struct ext3_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
* add_dirent_to_buf will attempt search the directory block for
* space. It will return -ENOSPC if no space is available, and -EIO
* and -EEXIST if directory entry already exists.
*
*
* NOTE! bh is NOT released in the case where ENOSPC is returned. In
* all other cases bh is released.
*/
@ -1572,7 +1572,7 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
* ext3_delete_entry deletes a directory entry by merging it with the
* previous entry
*/
static int ext3_delete_entry (handle_t *handle,
static int ext3_delete_entry (handle_t *handle,
struct inode * dir,
struct ext3_dir_entry_2 * de_del,
struct buffer_head * bh)
@ -1643,12 +1643,12 @@ static int ext3_add_nondir(handle_t *handle,
* is so far negative - it has no inode.
*
* If the create succeeds, we fill in the inode information
* with d_instantiate().
* with d_instantiate().
*/
static int ext3_create (struct inode * dir, struct dentry * dentry, int mode,
struct nameidata *nd)
{
handle_t *handle;
handle_t *handle;
struct inode * inode;
int err, retries = 0;
@ -1813,7 +1813,7 @@ static int empty_dir (struct inode * inode)
de1 = (struct ext3_dir_entry_2 *)
((char *) de + le16_to_cpu(de->rec_len));
if (le32_to_cpu(de->inode) != inode->i_ino ||
!le32_to_cpu(de1->inode) ||
!le32_to_cpu(de1->inode) ||
strcmp (".", de->name) ||
strcmp ("..", de1->name)) {
ext3_warning (inode->i_sb, "empty_dir",
@ -1883,7 +1883,7 @@ int ext3_orphan_add(handle_t *handle, struct inode *inode)
* being truncated, or files being unlinked. */
/* @@@ FIXME: Observation from aviro:
* I think I can trigger J_ASSERT in ext3_orphan_add(). We block
* I think I can trigger J_ASSERT in ext3_orphan_add(). We block
* here (on lock_super()), so race with ext3_link() which might bump
* ->i_nlink. For, say it, character device. Not a regular file,
* not a directory, not a symlink and ->i_nlink > 0.
@ -2393,4 +2393,4 @@ struct inode_operations ext3_special_inode_operations = {
.removexattr = generic_removexattr,
#endif
.permission = ext3_permission,
};
};

24
fs/ext3/super.c
View File

@ -62,13 +62,13 @@ static void ext3_unlockfs(struct super_block *sb);
static void ext3_write_super (struct super_block * sb);
static void ext3_write_super_lockfs(struct super_block *sb);
/*
/*
* Wrappers for journal_start/end.
*
* The only special thing we need to do here is to make sure that all
* journal_end calls result in the superblock being marked dirty, so
* that sync() will call the filesystem's write_super callback if
* appropriate.
* appropriate.
*/
handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
{
@ -90,11 +90,11 @@ handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
return journal_start(journal, nblocks);
}
/*
/*
* The only special thing we need to do here is to make sure that all
* journal_stop calls result in the superblock being marked dirty, so
* that sync() will call the filesystem's write_super callback if
* appropriate.
* appropriate.
*/
int __ext3_journal_stop(const char *where, handle_t *handle)
{
@ -369,7 +369,7 @@ static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
{
struct list_head *l;
printk(KERN_ERR "sb orphan head is %d\n",
printk(KERN_ERR "sb orphan head is %d\n",
le32_to_cpu(sbi->s_es->s_last_orphan));
printk(KERN_ERR "sb_info orphan list:\n");
@ -378,7 +378,7 @@ static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
printk(KERN_ERR " "
"inode %s:%ld at %p: mode %o, nlink %d, next %d\n",
inode->i_sb->s_id, inode->i_ino, inode,
inode->i_mode, inode->i_nlink,
inode->i_mode, inode->i_nlink,
NEXT_ORPHAN(inode));
}
}
@ -475,7 +475,7 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
inode_init_once(&ei->vfs_inode);
}
}
static int init_inodecache(void)
{
ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
@ -1483,7 +1483,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
(EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
printk(KERN_WARNING
printk(KERN_WARNING
"EXT3-fs warning: feature flags set on rev 0 fs, "
"running e2fsck is recommended\n");
/*
@ -1509,7 +1509,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
if (blocksize < EXT3_MIN_BLOCK_SIZE ||
blocksize > EXT3_MAX_BLOCK_SIZE) {
printk(KERN_ERR
printk(KERN_ERR
"EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
blocksize, sb->s_id);
goto failed_mount;
@ -1533,14 +1533,14 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
bh = sb_bread(sb, logic_sb_block);
if (!bh) {
printk(KERN_ERR
printk(KERN_ERR
"EXT3-fs: Can't read superblock on 2nd try.\n");
goto failed_mount;
}
es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
sbi->s_es = es;
if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
printk (KERN_ERR
printk (KERN_ERR
"EXT3-fs: Magic mismatch, very weird !\n");
goto failed_mount;
}
@ -1820,7 +1820,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
/*
* Setup any per-fs journal parameters now. We'll do this both on
* initial mount, once the journal has been initialised but before we've
* done any recovery; and again on any subsequent remount.
* done any recovery; and again on any subsequent remount.
*/
static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
{

30
fs/jbd/checkpoint.c
View File

@ -1,6 +1,6 @@
/*
* linux/fs/checkpoint.c
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1999
*
* Copyright 1999 Red Hat Software --- All Rights Reserved
@ -9,8 +9,8 @@
* the terms of the GNU General Public License, version 2, or at your
* option, any later version, incorporated herein by reference.
*
* Checkpoint routines for the generic filesystem journaling code.
* Part of the ext2fs journaling system.
* Checkpoint routines for the generic filesystem journaling code.
* Part of the ext2fs journaling system.
*
* Checkpointing is the process of ensuring that a section of the log is
* committed fully to disk, so that that portion of the log can be
@ -226,7 +226,7 @@ __flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
* Try to flush one buffer from the checkpoint list to disk.
*
* Return 1 if something happened which requires us to abort the current
* scan of the checkpoint list.
* scan of the checkpoint list.
*
* Called with j_list_lock held and drops it if 1 is returned
* Called under jbd_lock_bh_state(jh2bh(jh)), and drops it
@ -270,7 +270,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
* possibly block, while still holding the journal lock.
* We cannot afford to let the transaction logic start
* messing around with this buffer before we write it to
* disk, as that would break recoverability.
* disk, as that would break recoverability.
*/
BUFFER_TRACE(bh, "queue");
get_bh(bh);
@ -293,7 +293,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
* Perform an actual checkpoint. We take the first transaction on the
* list of transactions to be checkpointed and send all its buffers
* to disk. We submit larger chunks of data at once.
*
*
* The journal should be locked before calling this function.
*/
int log_do_checkpoint(journal_t *journal)
@ -304,10 +304,10 @@ int log_do_checkpoint(journal_t *journal)
jbd_debug(1, "Start checkpoint\n");
/*
/*
* First thing: if there are any transactions in the log which
* don't need checkpointing, just eliminate them from the
* journal straight away.
* journal straight away.
*/
result = cleanup_journal_tail(journal);
jbd_debug(1, "cleanup_journal_tail returned %d\n", result);
@ -385,9 +385,9 @@ int log_do_checkpoint(journal_t *journal)
* we have already got rid of any since the last update of the log tail
* in the journal superblock. If so, we can instantly roll the
* superblock forward to remove those transactions from the log.
*
*
* Return <0 on error, 0 on success, 1 if there was nothing to clean up.
*
*
* Called with the journal lock held.
*
* This is the only part of the journaling code which really needs to be
@ -404,8 +404,8 @@ int cleanup_journal_tail(journal_t *journal)
unsigned long blocknr, freed;
/* OK, work out the oldest transaction remaining in the log, and
* the log block it starts at.
*
* the log block it starts at.
*
* If the log is now empty, we need to work out which is the
* next transaction ID we will write, and where it will
* start. */
@ -558,7 +558,7 @@ int __journal_clean_checkpoint_list(journal_t *journal)
return ret;
}
/*
/*
* journal_remove_checkpoint: called after a buffer has been committed
* to disk (either by being write-back flushed to disk, or being
* committed to the log).
@ -636,7 +636,7 @@ int __journal_remove_checkpoint(struct journal_head *jh)
* Called with the journal locked.
* Called with j_list_lock held.
*/
void __journal_insert_checkpoint(struct journal_head *jh,
void __journal_insert_checkpoint(struct journal_head *jh,
transaction_t *transaction)
{
JBUFFER_TRACE(jh, "entry");
@ -658,7 +658,7 @@ void __journal_insert_checkpoint(struct journal_head *jh,
/*
* We've finished with this transaction structure: adios...
*
*
* The transaction must have no links except for the checkpoint by this
* point.
*

56
fs/jbd/journal.c
View File

@ -578,7 +578,7 @@ int journal_next_log_block(journal_t *journal, unsigned long *retp)
* this is a no-op. If needed, we can use j_blk_offset - everything is
* ready.
*/
int journal_bmap(journal_t *journal, unsigned long blocknr,
int journal_bmap(journal_t *journal, unsigned long blocknr,
unsigned long *retp)
{
int err = 0;
@ -699,10 +699,10 @@ static journal_t * journal_init_common (void)
* @len: Lenght of the journal in blocks.
* @blocksize: blocksize of journalling device
* @returns: a newly created journal_t *
*
*
* journal_init_dev creates a journal which maps a fixed contiguous
* range of blocks on an arbitrary block device.
*
*
*/
journal_t * journal_init_dev(struct block_device *bdev,
struct block_device *fs_dev,
@ -739,11 +739,11 @@ journal_t * journal_init_dev(struct block_device *bdev,
return journal;
}
/**
/**
* journal_t * journal_init_inode () - creates a journal which maps to a inode.
* @inode: An inode to create the journal in
*
*
* journal_init_inode creates a journal which maps an on-disk inode as
* the journal. The inode must exist already, must support bmap() and
* must have all data blocks preallocated.
@ -763,7 +763,7 @@ journal_t * journal_init_inode (struct inode *inode)
journal->j_inode = inode;
jbd_debug(1,
"journal %p: inode %s/%ld, size %Ld, bits %d, blksize %ld\n",
journal, inode->i_sb->s_id, inode->i_ino,
journal, inode->i_sb->s_id, inode->i_ino,
(long long) inode->i_size,
inode->i_sb->s_blocksize_bits, inode->i_sb->s_blocksize);
@ -798,10 +798,10 @@ journal_t * journal_init_inode (struct inode *inode)
return journal;
}
/*
/*
* If the journal init or create aborts, we need to mark the journal
* superblock as being NULL to prevent the journal destroy from writing
* back a bogus superblock.
* back a bogus superblock.
*/
static void journal_fail_superblock (journal_t *journal)
{
@ -844,13 +844,13 @@ static int journal_reset(journal_t *journal)
return 0;
}
/**
/**
* int journal_create() - Initialise the new journal file
* @journal: Journal to create. This structure must have been initialised
*
*
* Given a journal_t structure which tells us which disk blocks we can
* use, create a new journal superblock and initialise all of the
* journal fields from scratch.
* journal fields from scratch.
**/
int journal_create(journal_t *journal)
{
@ -915,7 +915,7 @@ int journal_create(journal_t *journal)
return journal_reset(journal);
}
/**
/**
* void journal_update_superblock() - Update journal sb on disk.
* @journal: The journal to update.
* @wait: Set to '0' if you don't want to wait for IO completion.
@ -939,7 +939,7 @@ void journal_update_superblock(journal_t *journal, int wait)
journal->j_transaction_sequence) {
jbd_debug(1,"JBD: Skipping superblock update on recovered sb "
"(start %ld, seq %d, errno %d)\n",
journal->j_tail, journal->j_tail_sequence,
journal->j_tail, journal->j_tail_sequence,
journal->j_errno);
goto out;
}
@ -1062,7 +1062,7 @@ static int load_superblock(journal_t *journal)
/**
* int journal_load() - Read journal from disk.
* @journal: Journal to act on.
*
*
* Given a journal_t structure which tells us which disk blocks contain
* a journal, read the journal from disk to initialise the in-memory
* structures.
@ -1172,9 +1172,9 @@ void journal_destroy(journal_t *journal)
* @compat: bitmask of compatible features
* @ro: bitmask of features that force read-only mount
* @incompat: bitmask of incompatible features
*
*
* Check whether the journal uses all of a given set of
* features. Return true (non-zero) if it does.
* features. Return true (non-zero) if it does.
**/
int journal_check_used_features (journal_t *journal, unsigned long compat,
@ -1203,7 +1203,7 @@ int journal_check_used_features (journal_t *journal, unsigned long compat,
* @compat: bitmask of compatible features
* @ro: bitmask of features that force read-only mount
* @incompat: bitmask of incompatible features
*
*
* Check whether the journaling code supports the use of
* all of a given set of features on this journal. Return true
* (non-zero) if it can. */
@ -1241,7 +1241,7 @@ int journal_check_available_features (journal_t *journal, unsigned long compat,
* @incompat: bitmask of incompatible features
*
* Mark a given journal feature as present on the
* superblock. Returns true if the requested features could be set.
* superblock. Returns true if the requested features could be set.
*
*/
@ -1327,7 +1327,7 @@ static int journal_convert_superblock_v1(journal_t *journal,
/**
* int journal_flush () - Flush journal
* @journal: Journal to act on.
*
*
* Flush all data for a given journal to disk and empty the journal.
* Filesystems can use this when remounting readonly to ensure that
* recovery does not need to happen on remount.
@ -1394,7 +1394,7 @@ int journal_flush(journal_t *journal)
* int journal_wipe() - Wipe journal contents
* @journal: Journal to act on.
* @write: flag (see below)
*
*
* Wipe out all of the contents of a journal, safely. This will produce
* a warning if the journal contains any valid recovery information.
* Must be called between journal_init_*() and journal_load().
@ -1449,7 +1449,7 @@ static const char *journal_dev_name(journal_t *journal, char *buffer)
/*
* Journal abort has very specific semantics, which we describe
* for journal abort.
* for journal abort.
*
* Two internal function, which provide abort to te jbd layer
* itself are here.
@ -1504,7 +1504,7 @@ static void __journal_abort_soft (journal_t *journal, int errno)
* Perform a complete, immediate shutdown of the ENTIRE
* journal (not of a single transaction). This operation cannot be
* undone without closing and reopening the journal.
*
*
* The journal_abort function is intended to support higher level error
* recovery mechanisms such as the ext2/ext3 remount-readonly error
* mode.
@ -1538,7 +1538,7 @@ static void __journal_abort_soft (journal_t *journal, int errno)
* supply an errno; a null errno implies that absolutely no further
* writes are done to the journal (unless there are any already in
* progress).
*
*
*/
void journal_abort(journal_t *journal, int errno)
@ -1546,7 +1546,7 @@ void journal_abort(journal_t *journal, int errno)
__journal_abort_soft(journal, errno);
}
/**
/**
* int journal_errno () - returns the journal's error state.
* @journal: journal to examine.
*
@ -1570,7 +1570,7 @@ int journal_errno(journal_t *journal)
return err;
}
/**
/**
* int journal_clear_err () - clears the journal's error state
* @journal: journal to act on.
*
@ -1590,7 +1590,7 @@ int journal_clear_err(journal_t *journal)
return err;
}
/**
/**
* void journal_ack_err() - Ack journal err.
* @journal: journal to act on.
*
@ -1612,7 +1612,7 @@ int journal_blocks_per_page(struct inode *inode)
/*
* Simple support for retrying memory allocations. Introduced to help to
* debug different VM deadlock avoidance strategies.
* debug different VM deadlock avoidance strategies.
*/
void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry)
{

54
fs/jbd/recovery.c
View File

@ -1,6 +1,6 @@
/*
* linux/fs/recovery.c
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1999
*
* Copyright 1999-2000 Red Hat Software --- All Rights Reserved
@ -10,7 +10,7 @@
* option, any later version, incorporated herein by reference.
*
* Journal recovery routines for the generic filesystem journaling code;
* part of the ext2fs journaling system.
* part of the ext2fs journaling system.
*/
#ifndef __KERNEL__
@ -25,9 +25,9 @@
/*
* Maintain information about the progress of the recovery job, so that
* the different passes can carry information between them.
* the different passes can carry information between them.
*/
struct recovery_info
struct recovery_info
{
tid_t start_transaction;
tid_t end_transaction;
@ -116,7 +116,7 @@ static int do_readahead(journal_t *journal, unsigned int start)
err = 0;
failed:
if (nbufs)
if (nbufs)
journal_brelse_array(bufs, nbufs);
return err;
}
@ -128,7 +128,7 @@ static int do_readahead(journal_t *journal, unsigned int start)
* Read a block from the journal
*/
static int jread(struct buffer_head **bhp, journal_t *journal,
static int jread(struct buffer_head **bhp, journal_t *journal,
unsigned int offset)
{
int err;
@ -212,14 +212,14 @@ do { \
/**
* journal_recover - recovers a on-disk journal
* @journal: the journal to recover
*
*
* The primary function for recovering the log contents when mounting a
* journaled device.
* journaled device.
*
* Recovery is done in three passes. In the first pass, we look for the
* end of the log. In the second, we assemble the list of revoke
* blocks. In the third and final pass, we replay any un-revoked blocks
* in the log.
* in the log.
*/
int journal_recover(journal_t *journal)
{
@ -231,10 +231,10 @@ int journal_recover(journal_t *journal)
memset(&info, 0, sizeof(info));
sb = journal->j_superblock;
/*
/*
* The journal superblock's s_start field (the current log head)
* is always zero if, and only if, the journal was cleanly
* unmounted.
* unmounted.
*/
if (!sb->s_start) {
@ -253,7 +253,7 @@ int journal_recover(journal_t *journal)
jbd_debug(0, "JBD: recovery, exit status %d, "
"recovered transactions %u to %u\n",
err, info.start_transaction, info.end_transaction);
jbd_debug(0, "JBD: Replayed %d and revoked %d/%d blocks\n",
jbd_debug(0, "JBD: Replayed %d and revoked %d/%d blocks\n",
info.nr_replays, info.nr_revoke_hits, info.nr_revokes);
/* Restart the log at the next transaction ID, thus invalidating
@ -268,15 +268,15 @@ int journal_recover(journal_t *journal)
/**
* journal_skip_recovery - Start journal and wipe exiting records
* @journal: journal to startup
*
*
* Locate any valid recovery information from the journal and set up the
* journal structures in memory to ignore it (presumably because the
* caller has evidence that it is out of date).
* caller has evidence that it is out of date).
* This function does'nt appear to be exorted..
*
* We perform one pass over the journal to allow us to tell the user how
* much recovery information is being erased, and to let us initialise
* the journal transaction sequence numbers to the next unused ID.
* the journal transaction sequence numbers to the next unused ID.
*/
int journal_skip_recovery(journal_t *journal)
{
@ -297,7 +297,7 @@ int journal_skip_recovery(journal_t *journal)
#ifdef CONFIG_JBD_DEBUG
int dropped = info.end_transaction - be32_to_cpu(sb->s_sequence);
#endif
jbd_debug(0,
jbd_debug(0,
"JBD: ignoring %d transaction%s from the journal.\n",
dropped, (dropped == 1) ? "" : "s");
journal->j_transaction_sequence = ++info.end_transaction;
@ -324,10 +324,10 @@ static int do_one_pass(journal_t *journal,
MAX_BLOCKS_PER_DESC = ((journal->j_blocksize-sizeof(journal_header_t))
/ sizeof(journal_block_tag_t));
/*
/*
* First thing is to establish what we expect to find in the log
* (in terms of transaction IDs), and where (in terms of log
* block offsets): query the superblock.
* block offsets): query the superblock.
*/
sb = journal->j_superblock;
@ -344,7 +344,7 @@ static int do_one_pass(journal_t *journal,
* Now we walk through the log, transaction by transaction,
* making sure that each transaction has a commit block in the
* expected place. Each complete transaction gets replayed back
* into the main filesystem.
* into the main filesystem.
*/
while (1) {
@ -379,8 +379,8 @@ static int do_one_pass(journal_t *journal,
next_log_block++;
wrap(journal, next_log_block);
/* What kind of buffer is it?
*
/* What kind of buffer is it?
*
* If it is a descriptor block, check that it has the
* expected sequence number. Otherwise, we're all done
* here. */
@ -394,7 +394,7 @@ static int do_one_pass(journal_t *journal,
blocktype = be32_to_cpu(tmp->h_blocktype);
sequence = be32_to_cpu(tmp->h_sequence);
jbd_debug(3, "Found magic %d, sequence %d\n",
jbd_debug(3, "Found magic %d, sequence %d\n",
blocktype, sequence);
if (sequence != next_commit_ID) {
@ -438,7 +438,7 @@ static int do_one_pass(journal_t *journal,
/* Recover what we can, but
* report failure at the end. */
success = err;
printk (KERN_ERR
printk (KERN_ERR
"JBD: IO error %d recovering "
"block %ld in log\n",
err, io_block);
@ -452,7 +452,7 @@ static int do_one_pass(journal_t *journal,
* revoked, then we're all done
* here. */
if (journal_test_revoke
(journal, blocknr,
(journal, blocknr,
next_commit_ID)) {
brelse(obh);
++info->nr_revoke_hits;
@ -465,7 +465,7 @@ static int do_one_pass(journal_t *journal,
blocknr,
journal->j_blocksize);
if (nbh == NULL) {
printk(KERN_ERR
printk(KERN_ERR
"JBD: Out of memory "
"during recovery.\n");
err = -ENOMEM;
@ -537,7 +537,7 @@ static int do_one_pass(journal_t *journal,
}
done:
/*
/*
* We broke out of the log scan loop: either we came to the
* known end of the log or we found an unexpected block in the
* log. If the latter happened, then we know that the "current"
@ -567,7 +567,7 @@ static int do_one_pass(journal_t *journal,
/* Scan a revoke record, marking all blocks mentioned as revoked. */
static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,
static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,
tid_t sequence, struct recovery_info *info)
{
journal_revoke_header_t *header;

70
fs/jbd/revoke.c
View File

@ -1,6 +1,6 @@
/*
* linux/fs/revoke.c
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 2000
*
* Copyright 2000 Red Hat corp --- All Rights Reserved
@ -15,10 +15,10 @@
* Revoke is the mechanism used to prevent old log records for deleted
* metadata from being replayed on top of newer data using the same
* blocks. The revoke mechanism is used in two separate places:
*
*
* + Commit: during commit we write the entire list of the current
* transaction's revoked blocks to the journal
*
*
* + Recovery: during recovery we record the transaction ID of all
* revoked blocks. If there are multiple revoke records in the log
* for a single block, only the last one counts, and if there is a log
@ -29,7 +29,7 @@
* single transaction:
*
* Block is revoked and then journaled:
* The desired end result is the journaling of the new block, so we
* The desired end result is the journaling of the new block, so we
* cancel the revoke before the transaction commits.
*
* Block is journaled and then revoked:
@ -41,7 +41,7 @@
* transaction must have happened after the block was journaled and so
* the revoke must take precedence.
*
* Block is revoked and then written as data:
* Block is revoked and then written as data:
* The data write is allowed to succeed, but the revoke is _not_
* cancelled. We still need to prevent old log records from
* overwriting the new data. We don't even need to clear the revoke
@ -54,7 +54,7 @@
* buffer has not been revoked, and cancel_revoke
* need do nothing.
* RevokeValid set, Revoked set:
* buffer has been revoked.
* buffer has been revoked.
*/
#ifndef __KERNEL__
@ -77,7 +77,7 @@ static kmem_cache_t *revoke_table_cache;
journal replay, this involves recording the transaction ID of the
last transaction to revoke this block. */
struct jbd_revoke_record_s
struct jbd_revoke_record_s
{
struct list_head hash;
tid_t sequence; /* Used for recovery only */
@ -90,8 +90,8 @@ struct jbd_revoke_table_s
{
/* It is conceivable that we might want a larger hash table
* for recovery. Must be a power of two. */
int hash_size;
int hash_shift;
int hash_size;
int hash_shift;
struct list_head *hash_table;
};
@ -301,22 +301,22 @@ void journal_destroy_revoke(journal_t *journal)
#ifdef __KERNEL__
/*
/*
* journal_revoke: revoke a given buffer_head from the journal. This
* prevents the block from being replayed during recovery if we take a
* crash after this current transaction commits. Any subsequent
* metadata writes of the buffer in this transaction cancel the
* revoke.
* revoke.
*
* Note that this call may block --- it is up to the caller to make
* sure that there are no further calls to journal_write_metadata
* before the revoke is complete. In ext3, this implies calling the
* revoke before clearing the block bitmap when we are deleting
* metadata.
* metadata.
*
* Revoke performs a journal_forget on any buffer_head passed in as a
* parameter, but does _not_ forget the buffer_head if the bh was only
* found implicitly.
* found implicitly.
*
* bh_in may not be a journalled buffer - it may have come off
* the hash tables without an attached journal_head.
@ -325,7 +325,7 @@ void journal_destroy_revoke(journal_t *journal)
* by one.
*/
int journal_revoke(handle_t *handle, unsigned long blocknr,
int journal_revoke(handle_t *handle, unsigned long blocknr,
struct buffer_head *bh_in)
{
struct buffer_head *bh = NULL;
@ -487,7 +487,7 @@ void journal_switch_revoke_table(journal_t *journal)
else
journal->j_revoke = journal->j_revoke_table[0];
for (i = 0; i < journal->j_revoke->hash_size; i++)
for (i = 0; i < journal->j_revoke->hash_size; i++)
INIT_LIST_HEAD(&journal->j_revoke->hash_table[i]);
}
@ -498,7 +498,7 @@ void journal_switch_revoke_table(journal_t *journal)
* Called with the journal lock held.
*/
void journal_write_revoke_records(journal_t *journal,
void journal_write_revoke_records(journal_t *journal,
transaction_t *transaction)
{
struct journal_head *descriptor;
@ -507,7 +507,7 @@ void journal_write_revoke_records(journal_t *journal,
struct list_head *hash_list;
int i, offset, count;
descriptor = NULL;
descriptor = NULL;
offset = 0;
count = 0;
@ -519,10 +519,10 @@ void journal_write_revoke_records(journal_t *journal,
hash_list = &revoke->hash_table[i];
while (!list_empty(hash_list)) {
record = (struct jbd_revoke_record_s *)
record = (struct jbd_revoke_record_s *)
hash_list->next;
write_one_revoke_record(journal, transaction,
&descriptor, &offset,
&descriptor, &offset,
record);
count++;
list_del(&record->hash);
@ -534,14 +534,14 @@ void journal_write_revoke_records(journal_t *journal,
jbd_debug(1, "Wrote %d revoke records\n", count);
}
/*
/*
* Write out one revoke record. We need to create a new descriptor
* block if the old one is full or if we have not already created one.
* block if the old one is full or if we have not already created one.
*/
static void write_one_revoke_record(journal_t *journal,
static void write_one_revoke_record(journal_t *journal,
transaction_t *transaction,
struct journal_head **descriptorp,
struct journal_head **descriptorp,
int *offsetp,
struct jbd_revoke_record_s *record)
{
@ -584,21 +584,21 @@ static void write_one_revoke_record(journal_t *journal,
*descriptorp = descriptor;
}
* ((__be32 *)(&jh2bh(descriptor)->b_data[offset])) =
* ((__be32 *)(&jh2bh(descriptor)->b_data[offset])) =
cpu_to_be32(record->blocknr);
offset += 4;
*offsetp = offset;
}
/*
/*
* Flush a revoke descriptor out to the journal. If we are aborting,
* this is a noop; otherwise we are generating a buffer which needs to
* be waited for during commit, so it has to go onto the appropriate
* journal buffer list.
*/
static void flush_descriptor(journal_t *journal,
struct journal_head *descriptor,
static void flush_descriptor(journal_t *journal,
struct journal_head *descriptor,
int offset)
{
journal_revoke_header_t *header;
@ -618,7 +618,7 @@ static void flush_descriptor(journal_t *journal,
}
#endif
/*
/*
* Revoke support for recovery.
*
* Recovery needs to be able to:
@ -629,7 +629,7 @@ static void flush_descriptor(journal_t *journal,
* check whether a given block in a given transaction should be replayed
* (ie. has not been revoked by a revoke record in that or a subsequent
* transaction)
*
*
* empty the revoke table after recovery.
*/
@ -637,11 +637,11 @@ static void flush_descriptor(journal_t *journal,
* First, setting revoke records. We create a new revoke record for
* every block ever revoked in the log as we scan it for recovery, and
* we update the existing records if we find multiple revokes for a
* single block.
* single block.
*/
int journal_set_revoke(journal_t *journal,
unsigned long blocknr,
int journal_set_revoke(journal_t *journal,
unsigned long blocknr,
tid_t sequence)
{
struct jbd_revoke_record_s *record;
@ -653,18 +653,18 @@ int journal_set_revoke(journal_t *journal,
if (tid_gt(sequence, record->sequence))
record->sequence = sequence;
return 0;
}
}
return insert_revoke_hash(journal, blocknr, sequence);
}
/*
/*
* Test revoke records. For a given block referenced in the log, has
* that block been revoked? A revoke record with a given transaction
* sequence number revokes all blocks in that transaction and earlier
* ones, but later transactions still need replayed.
*/
int journal_test_revoke(journal_t *journal,
int journal_test_revoke(journal_t *journal,
unsigned long blocknr,
tid_t sequence)
{

128
fs/jbd/transaction.c
View File

@ -1,6 +1,6 @@
/*
* linux/fs/transaction.c
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1998
*
* Copyright 1998 Red Hat corp --- All Rights Reserved
@ -10,7 +10,7 @@
* option, any later version, incorporated herein by reference.
*
* Generic filesystem transaction handling code; part of the ext2fs
* journaling system.
* journaling system.
*
* This file manages transactions (compound commits managed by the
* journaling code) and handles (individual atomic operations by the
@ -74,7 +74,7 @@ get_transaction(journal_t *journal, transaction_t *transaction)
* start_this_handle: Given a handle, deal with any locking or stalling
* needed to make sure that there is enough journal space for the handle
* to begin. Attach the handle to a transaction and set up the
* transaction's buffer credits.
* transaction's buffer credits.
*/
static int start_this_handle(journal_t *journal, handle_t *handle)
@ -117,7 +117,7 @@ static int start_this_handle(journal_t *journal, handle_t *handle)
if (is_journal_aborted(journal) ||
(journal->j_errno != 0 && !(journal->j_flags & JFS_ACK_ERR))) {
spin_unlock(&journal->j_state_lock);
ret = -EROFS;
ret = -EROFS;
goto out;
}
@ -182,7 +182,7 @@ static int start_this_handle(journal_t *journal, handle_t *handle)
goto repeat;
}
/*
/*
* The commit code assumes that it can get enough log space
* without forcing a checkpoint. This is *critical* for
* correctness: a checkpoint of a buffer which is also
@ -191,7 +191,7 @@ static int start_this_handle(journal_t *journal, handle_t *handle)
*
* We must therefore ensure the necessary space in the journal
* *before* starting to dirty potentially checkpointed buffers
* in the new transaction.
* in the new transaction.
*
* The worst part is, any transaction currently committing can
* reduce the free space arbitrarily. Be careful to account for
@ -246,13 +246,13 @@ static handle_t *new_handle(int nblocks)
}
/**
* handle_t *journal_start() - Obtain a new handle.
* handle_t *journal_start() - Obtain a new handle.
* @journal: Journal to start transaction on.
* @nblocks: number of block buffer we might modify
*
* We make sure that the transaction can guarantee at least nblocks of
* modified buffers in the log. We block until the log can guarantee
* that much space.
* that much space.
*
* This function is visible to journal users (like ext3fs), so is not
* called with the journal already locked.
@ -292,11 +292,11 @@ handle_t *journal_start(journal_t *journal, int nblocks)
* int journal_extend() - extend buffer credits.
* @handle: handle to 'extend'
* @nblocks: nr blocks to try to extend by.
*
*
* Some transactions, such as large extends and truncates, can be done
* atomically all at once or in several stages. The operation requests
* a credit for a number of buffer modications in advance, but can
* extend its credit if it needs more.
* extend its credit if it needs more.
*
* journal_extend tries to give the running handle more buffer credits.
* It does not guarantee that allocation - this is a best-effort only.
@ -363,7 +363,7 @@ int journal_extend(handle_t *handle, int nblocks)
* int journal_restart() - restart a handle .
* @handle: handle to restart
* @nblocks: nr credits requested
*
*
* Restart a handle for a multi-transaction filesystem
* operation.
*
@ -462,7 +462,7 @@ void journal_lock_updates(journal_t *journal)
/**
* void journal_unlock_updates (journal_t* journal) - release barrier
* @journal: Journal to release the barrier on.
*
*
* Release a transaction barrier obtained with journal_lock_updates().
*
* Should be called without the journal lock held.
@ -547,8 +547,8 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
jbd_lock_bh_state(bh);
/* We now hold the buffer lock so it is safe to query the buffer
* state. Is the buffer dirty?
*
* state. Is the buffer dirty?
*
* If so, there are two possibilities. The buffer may be
* non-journaled, and undergoing a quite legitimate writeback.
* Otherwise, it is journaled, and we don't expect dirty buffers
@ -566,7 +566,7 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
*/
if (jh->b_transaction) {
J_ASSERT_JH(jh,
jh->b_transaction == transaction ||
jh->b_transaction == transaction ||
jh->b_transaction ==
journal->j_committing_transaction);
if (jh->b_next_transaction)
@ -653,7 +653,7 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
* buffer had better remain locked during the kmalloc,
* but that should be true --- we hold the journal lock
* still and the buffer is already on the BUF_JOURNAL
* list so won't be flushed.
* list so won't be flushed.
*
* Subtle point, though: if this is a get_undo_access,
* then we will be relying on the frozen_data to contain
@ -765,8 +765,8 @@ int journal_get_write_access(handle_t *handle, struct buffer_head *bh)
* manually rather than reading off disk), then we need to keep the
* buffer_head locked until it has been completely filled with new
* data. In this case, we should be able to make the assertion that
* the bh is not already part of an existing transaction.
*
* the bh is not already part of an existing transaction.
*
* The buffer should already be locked by the caller by this point.
* There is no lock ranking violation: it was a newly created,
* unlocked buffer beforehand. */
@ -778,7 +778,7 @@ int journal_get_write_access(handle_t *handle, struct buffer_head *bh)
*
* Call this if you create a new bh.
*/
int journal_get_create_access(handle_t *handle, struct buffer_head *bh)
int journal_get_create_access(handle_t *handle, struct buffer_head *bh)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal = transaction->t_journal;
@ -847,13 +847,13 @@ int journal_get_create_access(handle_t *handle, struct buffer_head *bh)
* do not reuse freed space until the deallocation has been committed,
* since if we overwrote that space we would make the delete
* un-rewindable in case of a crash.
*
*
* To deal with that, journal_get_undo_access requests write access to a
* buffer for parts of non-rewindable operations such as delete
* operations on the bitmaps. The journaling code must keep a copy of
* the buffer's contents prior to the undo_access call until such time
* as we know that the buffer has definitely been committed to disk.
*
*
* We never need to know which transaction the committed data is part
* of, buffers touched here are guaranteed to be dirtied later and so
* will be committed to a new transaction in due course, at which point
@ -911,13 +911,13 @@ int journal_get_undo_access(handle_t *handle, struct buffer_head *bh)
return err;
}
/**
/**
* int journal_dirty_data() - mark a buffer as containing dirty data which
* needs to be flushed before we can commit the
* current transaction.
* current transaction.
* @handle: transaction
* @bh: bufferhead to mark
*
*
* The buffer is placed on the transaction's data list and is marked as
* belonging to the transaction.
*
@ -946,15 +946,15 @@ int journal_dirty_data(handle_t *handle, struct buffer_head *bh)
/*
* What if the buffer is already part of a running transaction?
*
*
* There are two cases:
* 1) It is part of the current running transaction. Refile it,
* just in case we have allocated it as metadata, deallocated
* it, then reallocated it as data.
* it, then reallocated it as data.
* 2) It is part of the previous, still-committing transaction.
* If all we want to do is to guarantee that the buffer will be
* written to disk before this new transaction commits, then
* being sure that the *previous* transaction has this same
* being sure that the *previous* transaction has this same
* property is sufficient for us! Just leave it on its old
* transaction.
*
@ -1076,18 +1076,18 @@ int journal_dirty_data(handle_t *handle, struct buffer_head *bh)
return 0;
}
/**
/**
* int journal_dirty_metadata() - mark a buffer as containing dirty metadata
* @handle: transaction to add buffer to.
* @bh: buffer to mark
*
* @bh: buffer to mark
*
* mark dirty metadata which needs to be journaled as part of the current
* transaction.
*
* The buffer is placed on the transaction's metadata list and is marked
* as belonging to the transaction.
* as belonging to the transaction.
*
* Returns error number or 0 on success.
* Returns error number or 0 on success.
*
* Special care needs to be taken if the buffer already belongs to the
* current committing transaction (in which case we should have frozen
@ -1135,11 +1135,11 @@ int journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
set_buffer_jbddirty(bh);
/*
/*
* Metadata already on the current transaction list doesn't
* need to be filed. Metadata on another transaction's list must
* be committing, and will be refiled once the commit completes:
* leave it alone for now.
* leave it alone for now.
*/
if (jh->b_transaction != transaction) {
JBUFFER_TRACE(jh, "already on other transaction");
@ -1165,7 +1165,7 @@ int journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
return 0;
}
/*
/*
* journal_release_buffer: undo a get_write_access without any buffer
* updates, if the update decided in the end that it didn't need access.
*
@ -1176,20 +1176,20 @@ journal_release_buffer(handle_t *handle, struct buffer_head *bh)
BUFFER_TRACE(bh, "entry");
}
/**
/**
* void journal_forget() - bforget() for potentially-journaled buffers.
* @handle: transaction handle
* @bh: bh to 'forget'
*
* We can only do the bforget if there are no commits pending against the
* buffer. If the buffer is dirty in the current running transaction we
* can safely unlink it.
* can safely unlink it.
*
* bh may not be a journalled buffer at all - it may be a non-JBD
* buffer which came off the hashtable. Check for this.
*
* Decrements bh->b_count by one.
*
*
* Allow this call even if the handle has aborted --- it may be part of
* the caller's cleanup after an abort.
*/
@ -1237,7 +1237,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
drop_reserve = 1;
/*
/*
* We are no longer going to journal this buffer.
* However, the commit of this transaction is still
* important to the buffer: the delete that we are now
@ -1246,7 +1246,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
*
* So, if we have a checkpoint on the buffer, we should
* now refile the buffer on our BJ_Forget list so that
* we know to remove the checkpoint after we commit.
* we know to remove the checkpoint after we commit.
*/
if (jh->b_cp_transaction) {
@ -1264,7 +1264,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
}
}
} else if (jh->b_transaction) {
J_ASSERT_JH(jh, (jh->b_transaction ==
J_ASSERT_JH(jh, (jh->b_transaction ==
journal->j_committing_transaction));
/* However, if the buffer is still owned by a prior
* (committing) transaction, we can't drop it yet... */
@ -1294,7 +1294,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
/**
* int journal_stop() - complete a transaction
* @handle: tranaction to complete.
*
*
* All done for a particular handle.
*
* There is not much action needed here. We just return any remaining
@ -1303,7 +1303,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
* filesystem is marked for synchronous update.
*
* journal_stop itself will not usually return an error, but it may
* do so in unusual circumstances. In particular, expect it to
* do so in unusual circumstances. In particular, expect it to
* return -EIO if a journal_abort has been executed since the
* transaction began.
*/
@ -1388,7 +1388,7 @@ int journal_stop(handle_t *handle)
/*
* Special case: JFS_SYNC synchronous updates require us
* to wait for the commit to complete.
* to wait for the commit to complete.
*/
if (handle->h_sync && !(current->flags & PF_MEMALLOC))
err = log_wait_commit(journal, tid);
@ -1439,7 +1439,7 @@ int journal_force_commit(journal_t *journal)
* jbd_lock_bh_state(jh2bh(jh)) is held.
*/
static inline void
static inline void
__blist_add_buffer(struct journal_head **list, struct journal_head *jh)
{
if (!*list) {
@ -1454,7 +1454,7 @@ __blist_add_buffer(struct journal_head **list, struct journal_head *jh)
}
}
/*
/*
* Remove a buffer from a transaction list, given the transaction's list
* head pointer.
*
@ -1475,7 +1475,7 @@ __blist_del_buffer(struct journal_head **list, struct journal_head *jh)
jh->b_tnext->b_tprev = jh->b_tprev;
}
/*
/*
* Remove a buffer from the appropriate transaction list.
*
* Note that this function can *change* the value of
@ -1595,17 +1595,17 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
}
/**
/**
* int journal_try_to_free_buffers() - try to free page buffers.
* @journal: journal for operation
* @page: to try and free
* @unused_gfp_mask: unused
*
*
*
* For all the buffers on this page,
* if they are fully written out ordered data, move them onto BUF_CLEAN
* so try_to_free_buffers() can reap them.
*
*
* This function returns non-zero if we wish try_to_free_buffers()
* to be called. We do this if the page is releasable by try_to_free_buffers().
* We also do it if the page has locked or dirty buffers and the caller wants
@ -1629,7 +1629,7 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
* cannot happen because we never reallocate freed data as metadata
* while the data is part of a transaction. Yes?
*/
int journal_try_to_free_buffers(journal_t *journal,
int journal_try_to_free_buffers(journal_t *journal,
struct page *page, gfp_t unused_gfp_mask)
{
struct buffer_head *head;
@ -1697,7 +1697,7 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
}
/*
* journal_invalidatepage
* journal_invalidatepage
*
* This code is tricky. It has a number of cases to deal with.
*
@ -1705,15 +1705,15 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
*
* i_size must be updated on disk before we start calling invalidatepage on the
* data.
*
*
* This is done in ext3 by defining an ext3_setattr method which
* updates i_size before truncate gets going. By maintaining this
* invariant, we can be sure that it is safe to throw away any buffers
* attached to the current transaction: once the transaction commits,
* we know that the data will not be needed.
*
*
* Note however that we can *not* throw away data belonging to the
* previous, committing transaction!
* previous, committing transaction!
*
* Any disk blocks which *are* part of the previous, committing
* transaction (and which therefore cannot be discarded immediately) are
@ -1732,7 +1732,7 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
* don't make guarantees about the order in which data hits disk --- in
* particular we don't guarantee that new dirty data is flushed before
* transaction commit --- so it is always safe just to discard data
* immediately in that mode. --sct
* immediately in that mode. --sct
*/
/*
@ -1876,9 +1876,9 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
return may_free;
}
/**
/**
* void journal_invalidatepage()
* @journal: journal to use for flush...
* @journal: journal to use for flush...
* @page: page to flush
* @offset: length of page to invalidate.
*
@ -1886,7 +1886,7 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
*
*/
void journal_invalidatepage(journal_t *journal,
struct page *page,
struct page *page,
unsigned long offset)
{
struct buffer_head *head, *bh, *next;
@ -1924,8 +1924,8 @@ void journal_invalidatepage(journal_t *journal,
}
}
/*
* File a buffer on the given transaction list.
/*
* File a buffer on the given transaction list.
*/
void __journal_file_buffer(struct journal_head *jh,
transaction_t *transaction, int jlist)
@ -1948,7 +1948,7 @@ void __journal_file_buffer(struct journal_head *jh,
* with __jbd_unexpected_dirty_buffer()'s handling of dirty
* state. */
if (jlist == BJ_Metadata || jlist == BJ_Reserved ||
if (jlist == BJ_Metadata || jlist == BJ_Reserved ||
jlist == BJ_Shadow || jlist == BJ_Forget) {
if (test_clear_buffer_dirty(bh) ||
test_clear_buffer_jbddirty(bh))
@ -2008,7 +2008,7 @@ void journal_file_buffer(struct journal_head *jh,
jbd_unlock_bh_state(jh2bh(jh));
}
/*
/*
* Remove a buffer from its current buffer list in preparation for
* dropping it from its current transaction entirely. If the buffer has
* already started to be used by a subsequent transaction, refile the
@ -2060,7 +2060,7 @@ void __journal_refile_buffer(struct journal_head *jh)
* to the caller to remove the journal_head if necessary. For the
* unlocked journal_refile_buffer call, the caller isn't going to be
* doing anything else to the buffer so we need to do the cleanup
* ourselves to avoid a jh leak.
* ourselves to avoid a jh leak.
*
* *** The journal_head may be freed by this call! ***
*/

10
include/linux/ext3_jbd.h
View File

@ -23,7 +23,7 @@
/* Define the number of blocks we need to account to a transaction to
* modify one block of data.
*
*
* We may have to touch one inode, one bitmap buffer, up to three
* indirection blocks, the group and superblock summaries, and the data
* block to complete the transaction. */
@ -88,16 +88,16 @@
#endif
int
ext3_mark_iloc_dirty(handle_t *handle,
ext3_mark_iloc_dirty(handle_t *handle,
struct inode *inode,
struct ext3_iloc *iloc);
/*
/*
* On success, We end up with an outstanding reference count against
* iloc->bh. This _must_ be cleaned up later.
* iloc->bh. This _must_ be cleaned up later.
*/
int ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
int ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
struct ext3_iloc *iloc);
int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode);

56
include/linux/jbd.h
View File

@ -1,6 +1,6 @@
/*
* linux/include/linux/jbd.h
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>
*
* Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
@ -97,8 +97,8 @@ extern void jbd_slab_free(void *ptr, size_t size);
* number of outstanding buffers possible at any time. When the
* operation completes, any buffer credits not used are credited back to
* the transaction, so that at all times we know how many buffers the
* outstanding updates on a transaction might possibly touch.
*
* outstanding updates on a transaction might possibly touch.
*
* This is an opaque datatype.
**/
typedef struct handle_s handle_t; /* Atomic operation type */
@ -108,7 +108,7 @@ typedef struct handle_s handle_t; /* Atomic operation type */
* typedef journal_t - The journal_t maintains all of the journaling state information for a single filesystem.
*
* journal_t is linked to from the fs superblock structure.
*
*
* We use the journal_t to keep track of all outstanding transaction
* activity on the filesystem, and to manage the state of the log
* writing process.
@ -128,7 +128,7 @@ typedef struct journal_s journal_t; /* Journal control structure */
* On-disk structures
*/
/*
/*
* Descriptor block types:
*/
@ -149,8 +149,8 @@ typedef struct journal_header_s
} journal_header_t;
/*
* The block tag: used to describe a single buffer in the journal
/*
* The block tag: used to describe a single buffer in the journal
*/
typedef struct journal_block_tag_s
{
@ -158,9 +158,9 @@ typedef struct journal_block_tag_s
__be32 t_flags; /* See below */
} journal_block_tag_t;
/*
/*
* The revoke descriptor: used on disk to describe a series of blocks to
* be revoked from the log
* be revoked from the log
*/
typedef struct journal_revoke_header_s
{
@ -374,10 +374,10 @@ struct jbd_revoke_table_s;
**/
/* Docbook can't yet cope with the bit fields, but will leave the documentation
* in so it can be fixed later.
* in so it can be fixed later.
*/
struct handle_s
struct handle_s
{
/* Which compound transaction is this update a part of? */
transaction_t *h_transaction;
@ -435,7 +435,7 @@ struct handle_s
*
*/
struct transaction_s
struct transaction_s
{
/* Pointer to the journal for this transaction. [no locking] */
journal_t *t_journal;
@ -455,7 +455,7 @@ struct transaction_s
T_RUNDOWN,
T_FLUSH,
T_COMMIT,
T_FINISHED
T_FINISHED
} t_state;
/*
@ -569,7 +569,7 @@ struct transaction_s
* journal_t.
* @j_flags: General journaling state flags
* @j_errno: Is there an outstanding uncleared error on the journal (from a
* prior abort)?
* prior abort)?
* @j_sb_buffer: First part of superblock buffer
* @j_superblock: Second part of superblock buffer
* @j_format_version: Version of the superblock format
@ -583,7 +583,7 @@ struct transaction_s
* @j_wait_transaction_locked: Wait queue for waiting for a locked transaction
* to start committing, or for a barrier lock to be released
* @j_wait_logspace: Wait queue for waiting for checkpointing to complete
* @j_wait_done_commit: Wait queue for waiting for commit to complete
* @j_wait_done_commit: Wait queue for waiting for commit to complete
* @j_wait_checkpoint: Wait queue to trigger checkpointing
* @j_wait_commit: Wait queue to trigger commit
* @j_wait_updates: Wait queue to wait for updates to complete
@ -592,7 +592,7 @@ struct transaction_s
* @j_tail: Journal tail - identifies the oldest still-used block in the
* journal.
* @j_free: Journal free - how many free blocks are there in the journal?
* @j_first: The block number of the first usable block
* @j_first: The block number of the first usable block
* @j_last: The block number one beyond the last usable block
* @j_dev: Device where we store the journal
* @j_blocksize: blocksize for the location where we store the journal.
@ -604,12 +604,12 @@ struct transaction_s
* @j_list_lock: Protects the buffer lists and internal buffer state.
* @j_inode: Optional inode where we store the journal. If present, all journal
* block numbers are mapped into this inode via bmap().
* @j_tail_sequence: Sequence number of the oldest transaction in the log
* @j_tail_sequence: Sequence number of the oldest transaction in the log
* @j_transaction_sequence: Sequence number of the next transaction to grant
* @j_commit_sequence: Sequence number of the most recently committed
* transaction
* @j_commit_request: Sequence number of the most recent transaction wanting
* commit
* commit
* @j_uuid: Uuid of client object.
* @j_task: Pointer to the current commit thread for this journal
* @j_max_transaction_buffers: Maximum number of metadata buffers to allow in a
@ -823,8 +823,8 @@ struct journal_s
void *j_private;
};
/*
* Journal flag definitions
/*
* Journal flag definitions
*/
#define JFS_UNMOUNT 0x001 /* Journal thread is being destroyed */
#define JFS_ABORT 0x002 /* Journaling has been aborted for errors. */
@ -833,7 +833,7 @@ struct journal_s
#define JFS_LOADED 0x010 /* The journal superblock has been loaded */
#define JFS_BARRIER 0x020 /* Use IDE barriers */
/*
/*
* Function declarations for the journaling transaction and buffer
* management
*/
@ -862,7 +862,7 @@ int __journal_remove_checkpoint(struct journal_head *);
void __journal_insert_checkpoint(struct journal_head *, transaction_t *);
/* Buffer IO */
extern int
extern int
journal_write_metadata_buffer(transaction_t *transaction,
struct journal_head *jh_in,
struct journal_head **jh_out,
@ -890,7 +890,7 @@ static inline handle_t *journal_current_handle(void)
/* The journaling code user interface:
*
* Create and destroy handles
* Register buffer modifications against the current transaction.
* Register buffer modifications against the current transaction.
*/
extern handle_t *journal_start(journal_t *, int nblocks);
@ -917,11 +917,11 @@ extern journal_t * journal_init_dev(struct block_device *bdev,
int start, int len, int bsize);
extern journal_t * journal_init_inode (struct inode *);
extern int journal_update_format (journal_t *);
extern int journal_check_used_features
extern int journal_check_used_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern int journal_check_available_features
extern int journal_check_available_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern int journal_set_features
extern int journal_set_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern int journal_create (journal_t *);
extern int journal_load (journal_t *journal);
@ -1015,7 +1015,7 @@ do { \
* bit, when set, indicates that we have had a fatal error somewhere,
* either inside the journaling layer or indicated to us by the client
* (eg. ext3), and that we and should not commit any further
* transactions.
* transactions.
*/
static inline int is_journal_aborted(journal_t *journal)
@ -1082,7 +1082,7 @@ static inline int jbd_space_needed(journal_t *journal)
#define BJ_Reserved 7 /* Buffer is reserved for access by journal */
#define BJ_Locked 8 /* Locked for I/O during commit */
#define BJ_Types 9
extern int jbd_blocks_per_page(struct inode *inode);
#ifdef __KERNEL__