120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*
|
|
* Copyright (c) International Business Machines Corp., 2000-2002
|
|
* Portions Copyright (c) Christoph Hellwig, 2001-2002
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include "jfs_incore.h"
|
|
#include "jfs_dmap.h"
|
|
#include "jfs_txnmgr.h"
|
|
#include "jfs_xattr.h"
|
|
#include "jfs_acl.h"
|
|
#include "jfs_debug.h"
|
|
|
|
|
|
extern int jfs_commit_inode(struct inode *, int);
|
|
extern void jfs_truncate(struct inode *);
|
|
|
|
int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
int rc = 0;
|
|
|
|
if (!(inode->i_state & I_DIRTY) ||
|
|
(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
|
|
/* Make sure committed changes hit the disk */
|
|
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
|
|
return rc;
|
|
}
|
|
|
|
rc |= jfs_commit_inode(inode, 1);
|
|
|
|
return rc ? -EIO : 0;
|
|
}
|
|
|
|
static int jfs_open(struct inode *inode, struct file *file)
|
|
{
|
|
int rc;
|
|
|
|
if ((rc = generic_file_open(inode, file)))
|
|
return rc;
|
|
|
|
/*
|
|
* We attempt to allow only one "active" file open per aggregate
|
|
* group. Otherwise, appending to files in parallel can cause
|
|
* fragmentation within the files.
|
|
*
|
|
* If the file is empty, it was probably just created and going
|
|
* to be written to. If it has a size, we'll hold off until the
|
|
* file is actually grown.
|
|
*/
|
|
if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
|
|
(inode->i_size == 0)) {
|
|
struct jfs_inode_info *ji = JFS_IP(inode);
|
|
spin_lock_irq(&ji->ag_lock);
|
|
if (ji->active_ag == -1) {
|
|
ji->active_ag = ji->agno;
|
|
atomic_inc(
|
|
&JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
|
|
}
|
|
spin_unlock_irq(&ji->ag_lock);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
static int jfs_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct jfs_inode_info *ji = JFS_IP(inode);
|
|
|
|
spin_lock_irq(&ji->ag_lock);
|
|
if (ji->active_ag != -1) {
|
|
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
|
|
atomic_dec(&bmap->db_active[ji->active_ag]);
|
|
ji->active_ag = -1;
|
|
}
|
|
spin_unlock_irq(&ji->ag_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct inode_operations jfs_file_inode_operations = {
|
|
.truncate = jfs_truncate,
|
|
.setxattr = jfs_setxattr,
|
|
.getxattr = jfs_getxattr,
|
|
.listxattr = jfs_listxattr,
|
|
.removexattr = jfs_removexattr,
|
|
#ifdef CONFIG_JFS_POSIX_ACL
|
|
.setattr = jfs_setattr,
|
|
.permission = jfs_permission,
|
|
#endif
|
|
};
|
|
|
|
struct file_operations jfs_file_operations = {
|
|
.open = jfs_open,
|
|
.llseek = generic_file_llseek,
|
|
.write = generic_file_write,
|
|
.read = generic_file_read,
|
|
.aio_read = generic_file_aio_read,
|
|
.aio_write = generic_file_aio_write,
|
|
.mmap = generic_file_mmap,
|
|
.readv = generic_file_readv,
|
|
.writev = generic_file_writev,
|
|
.sendfile = generic_file_sendfile,
|
|
.fsync = jfs_fsync,
|
|
.release = jfs_release,
|
|
};
|