mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Jan Kara](/assets/img/avatar_default.png)
Use improved credits estimates for quota operations. Also reserve a space for a quota operation in a transaction only if filesystem was mounted with some quota options. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
268 lines
8.2 KiB
C
268 lines
8.2 KiB
C
/*
|
|
* linux/include/linux/ext3_jbd.h
|
|
*
|
|
* Written by Stephen C. Tweedie <sct@redhat.com>, 1999
|
|
*
|
|
* Copyright 1998--1999 Red Hat corp --- All Rights Reserved
|
|
*
|
|
* This file is part of the Linux kernel and is made available under
|
|
* the terms of the GNU General Public License, version 2, or at your
|
|
* option, any later version, incorporated herein by reference.
|
|
*
|
|
* Ext3-specific journaling extensions.
|
|
*/
|
|
|
|
#ifndef _LINUX_EXT3_JBD_H
|
|
#define _LINUX_EXT3_JBD_H
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/jbd.h>
|
|
#include <linux/ext3_fs.h>
|
|
|
|
#define EXT3_JOURNAL(inode) (EXT3_SB((inode)->i_sb)->s_journal)
|
|
|
|
/* 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. */
|
|
|
|
#define EXT3_SINGLEDATA_TRANS_BLOCKS 8U
|
|
|
|
/* Extended attribute operations touch at most two data buffers,
|
|
* two bitmap buffers, and two group summaries, in addition to the inode
|
|
* and the superblock, which are already accounted for. */
|
|
|
|
#define EXT3_XATTR_TRANS_BLOCKS 6U
|
|
|
|
/* Define the minimum size for a transaction which modifies data. This
|
|
* needs to take into account the fact that we may end up modifying two
|
|
* quota files too (one for the group, one for the user quota). The
|
|
* superblock only gets updated once, of course, so don't bother
|
|
* counting that again for the quota updates. */
|
|
|
|
#define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \
|
|
EXT3_XATTR_TRANS_BLOCKS - 2 + \
|
|
2*EXT3_QUOTA_TRANS_BLOCKS(sb))
|
|
|
|
/* Delete operations potentially hit one directory's namespace plus an
|
|
* entire inode, plus arbitrary amounts of bitmap/indirection data. Be
|
|
* generous. We can grow the delete transaction later if necessary. */
|
|
|
|
#define EXT3_DELETE_TRANS_BLOCKS(sb) (2 * EXT3_DATA_TRANS_BLOCKS(sb) + 64)
|
|
|
|
/* Define an arbitrary limit for the amount of data we will anticipate
|
|
* writing to any given transaction. For unbounded transactions such as
|
|
* write(2) and truncate(2) we can write more than this, but we always
|
|
* start off at the maximum transaction size and grow the transaction
|
|
* optimistically as we go. */
|
|
|
|
#define EXT3_MAX_TRANS_DATA 64U
|
|
|
|
/* We break up a large truncate or write transaction once the handle's
|
|
* buffer credits gets this low, we need either to extend the
|
|
* transaction or to start a new one. Reserve enough space here for
|
|
* inode, bitmap, superblock, group and indirection updates for at least
|
|
* one block, plus two quota updates. Quota allocations are not
|
|
* needed. */
|
|
|
|
#define EXT3_RESERVE_TRANS_BLOCKS 12U
|
|
|
|
#define EXT3_INDEX_EXTRA_TRANS_BLOCKS 8
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
/* Amount of blocks needed for quota update - we know that the structure was
|
|
* allocated so we need to update only inode+data */
|
|
#define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
|
|
/* Amount of blocks needed for quota insert/delete - we do some block writes
|
|
* but inode, sb and group updates are done only once */
|
|
#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
|
|
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
|
|
#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
|
|
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
|
|
#else
|
|
#define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
|
|
#define EXT3_QUOTA_INIT_BLOCKS(sb) 0
|
|
#define EXT3_QUOTA_DEL_BLOCKS(sb) 0
|
|
#endif
|
|
|
|
int
|
|
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.
|
|
*/
|
|
|
|
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);
|
|
|
|
/*
|
|
* Wrapper functions with which ext3 calls into JBD. The intent here is
|
|
* to allow these to be turned into appropriate stubs so ext3 can control
|
|
* ext2 filesystems, so ext2+ext3 systems only nee one fs. This work hasn't
|
|
* been done yet.
|
|
*/
|
|
|
|
void ext3_journal_abort_handle(const char *caller, const char *err_fn,
|
|
struct buffer_head *bh, handle_t *handle, int err);
|
|
|
|
static inline int
|
|
__ext3_journal_get_undo_access(const char *where, handle_t *handle,
|
|
struct buffer_head *bh)
|
|
{
|
|
int err = journal_get_undo_access(handle, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
__ext3_journal_get_write_access(const char *where, handle_t *handle,
|
|
struct buffer_head *bh)
|
|
{
|
|
int err = journal_get_write_access(handle, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
static inline void
|
|
ext3_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
|
|
{
|
|
journal_release_buffer(handle, bh);
|
|
}
|
|
|
|
static inline int
|
|
__ext3_journal_forget(const char *where, handle_t *handle, struct buffer_head *bh)
|
|
{
|
|
int err = journal_forget(handle, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
__ext3_journal_revoke(const char *where, handle_t *handle,
|
|
unsigned long blocknr, struct buffer_head *bh)
|
|
{
|
|
int err = journal_revoke(handle, blocknr, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
__ext3_journal_get_create_access(const char *where,
|
|
handle_t *handle, struct buffer_head *bh)
|
|
{
|
|
int err = journal_get_create_access(handle, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
static inline int
|
|
__ext3_journal_dirty_metadata(const char *where,
|
|
handle_t *handle, struct buffer_head *bh)
|
|
{
|
|
int err = journal_dirty_metadata(handle, bh);
|
|
if (err)
|
|
ext3_journal_abort_handle(where, __FUNCTION__, bh, handle,err);
|
|
return err;
|
|
}
|
|
|
|
|
|
#define ext3_journal_get_undo_access(handle, bh) \
|
|
__ext3_journal_get_undo_access(__FUNCTION__, (handle), (bh))
|
|
#define ext3_journal_get_write_access(handle, bh) \
|
|
__ext3_journal_get_write_access(__FUNCTION__, (handle), (bh))
|
|
#define ext3_journal_revoke(handle, blocknr, bh) \
|
|
__ext3_journal_revoke(__FUNCTION__, (handle), (blocknr), (bh))
|
|
#define ext3_journal_get_create_access(handle, bh) \
|
|
__ext3_journal_get_create_access(__FUNCTION__, (handle), (bh))
|
|
#define ext3_journal_dirty_metadata(handle, bh) \
|
|
__ext3_journal_dirty_metadata(__FUNCTION__, (handle), (bh))
|
|
#define ext3_journal_forget(handle, bh) \
|
|
__ext3_journal_forget(__FUNCTION__, (handle), (bh))
|
|
|
|
int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh);
|
|
|
|
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 */
|