1 files changed, 119 insertions, 0 deletions
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
new file mode 100644
index 0000000..a87b06f
--- /dev/null
+++ b/fs/jfs/file.c
@@ -0,0 +1,119 @@
+/*
+ *   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,
+};