| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
|
* Copyright (c) International Business Machines Corp., 2000-2002
|
| 3 |
|
|
* Portions Copyright (c) Christoph Hellwig, 2001-2002
|
| 4 |
|
|
*
|
| 5 |
|
|
* This program is free software; you can redistribute it and/or modify
|
| 6 |
|
|
* it under the terms of the GNU General Public License as published by
|
| 7 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
| 8 |
|
|
* (at your option) any later version.
|
| 9 |
|
|
*
|
| 10 |
|
|
* This program is distributed in the hope that it will be useful,
|
| 11 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
| 13 |
|
|
* the GNU General Public License for more details.
|
| 14 |
|
|
*
|
| 15 |
|
|
* You should have received a copy of the GNU General Public License
|
| 16 |
|
|
* along with this program; if not, write to the Free Software
|
| 17 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 18 |
|
|
*/
|
| 19 |
|
|
|
| 20 |
|
|
#include <linux/fs.h>
|
| 21 |
|
|
#include "jfs_incore.h"
|
| 22 |
|
|
#include "jfs_dmap.h"
|
| 23 |
|
|
#include "jfs_txnmgr.h"
|
| 24 |
|
|
#include "jfs_xattr.h"
|
| 25 |
|
|
#include "jfs_debug.h"
|
| 26 |
|
|
|
| 27 |
|
|
|
| 28 |
|
|
extern int jfs_commit_inode(struct inode *, int);
|
| 29 |
|
|
extern void jfs_truncate(struct inode *);
|
| 30 |
|
|
|
| 31 |
|
|
int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
|
| 32 |
|
|
{
|
| 33 |
|
|
struct inode *inode = dentry->d_inode;
|
| 34 |
|
|
int rc = 0;
|
| 35 |
|
|
|
| 36 |
|
|
/* No need to resync the data at commit time, unless this flag gets
|
| 37 |
|
|
* set again */
|
| 38 |
|
|
clear_cflag(COMMIT_Syncdata, inode);
|
| 39 |
|
|
|
| 40 |
|
|
rc = fsync_inode_data_buffers(inode);
|
| 41 |
|
|
|
| 42 |
|
|
if (!(inode->i_state & I_DIRTY) ||
|
| 43 |
|
|
(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
|
| 44 |
|
|
/* Make sure committed changes hit the disk */
|
| 45 |
|
|
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
|
| 46 |
|
|
return rc;
|
| 47 |
|
|
}
|
| 48 |
|
|
|
| 49 |
|
|
rc |= jfs_commit_inode(inode, 1);
|
| 50 |
|
|
|
| 51 |
|
|
return rc ? -EIO : 0;
|
| 52 |
|
|
}
|
| 53 |
|
|
|
| 54 |
|
|
static int jfs_open(struct inode *inode, struct file *file)
|
| 55 |
|
|
{
|
| 56 |
|
|
int rc;
|
| 57 |
|
|
|
| 58 |
|
|
if ((rc = generic_file_open(inode, file)))
|
| 59 |
|
|
return rc;
|
| 60 |
|
|
|
| 61 |
|
|
/*
|
| 62 |
|
|
* We attempt to allow only one "active" file open per aggregate
|
| 63 |
|
|
* group. Otherwise, appending to files in parallel can cause
|
| 64 |
|
|
* fragmentation within the files.
|
| 65 |
|
|
*
|
| 66 |
|
|
* If the file is empty, it was probably just created and going
|
| 67 |
|
|
* to be written to. If it has a size, we'll hold off until the
|
| 68 |
|
|
* file is actually grown.
|
| 69 |
|
|
*/
|
| 70 |
|
|
if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
|
| 71 |
|
|
(inode->i_size == 0)) {
|
| 72 |
|
|
struct jfs_inode_info *ji = JFS_IP(inode);
|
| 73 |
|
|
if (ji->active_ag == -1) {
|
| 74 |
|
|
ji->active_ag = ji->agno;
|
| 75 |
|
|
atomic_inc(
|
| 76 |
|
|
&JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
|
| 77 |
|
|
}
|
| 78 |
|
|
}
|
| 79 |
|
|
|
| 80 |
|
|
return 0;
|
| 81 |
|
|
}
|
| 82 |
|
|
static int jfs_release(struct inode *inode, struct file *file)
|
| 83 |
|
|
{
|
| 84 |
|
|
struct jfs_inode_info *ji = JFS_IP(inode);
|
| 85 |
|
|
|
| 86 |
|
|
if (ji->active_ag != -1) {
|
| 87 |
|
|
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
|
| 88 |
|
|
atomic_dec(&bmap->db_active[ji->active_ag]);
|
| 89 |
|
|
ji->active_ag = -1;
|
| 90 |
|
|
}
|
| 91 |
|
|
|
| 92 |
|
|
return 0;
|
| 93 |
|
|
}
|
| 94 |
|
|
|
| 95 |
|
|
struct inode_operations jfs_file_inode_operations = {
|
| 96 |
|
|
.truncate = jfs_truncate,
|
| 97 |
|
|
.setxattr = jfs_setxattr,
|
| 98 |
|
|
.getxattr = jfs_getxattr,
|
| 99 |
|
|
.listxattr = jfs_listxattr,
|
| 100 |
|
|
.removexattr = jfs_removexattr,
|
| 101 |
|
|
};
|
| 102 |
|
|
|
| 103 |
|
|
struct file_operations jfs_file_operations = {
|
| 104 |
|
|
.open = jfs_open,
|
| 105 |
|
|
.llseek = generic_file_llseek,
|
| 106 |
|
|
.write = generic_file_write,
|
| 107 |
|
|
.read = generic_file_read,
|
| 108 |
|
|
.mmap = generic_file_mmap,
|
| 109 |
|
|
.fsync = jfs_fsync,
|
| 110 |
|
|
.release = jfs_release,
|
| 111 |
|
|
};
|
