[net-next-2.6.git] / fs / ext2 / file.c

/*
 *  linux/fs/ext2/file.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/fs/minix/file.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext2 fs regular file handling primitives
 *
 *  64-bit file support on 64-bit platforms by Jakub Jelinek
 * 	(jj@sunsite.ms.mff.cuni.cz)
 */

#include <linux/time.h>
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"

/*
 * Called when filp is released. This happens when all file descriptors
 * for a single struct file are closed. Note that different open() calls
 * for the same file yield different struct file structures.
 */
static int ext2_release_file (struct inode * inode, struct file * filp)
{
	if (filp->f_mode & FMODE_WRITE) {
		mutex_lock(&EXT2_I(inode)->truncate_mutex);
		ext2_discard_reservation(inode);
		mutex_unlock(&EXT2_I(inode)->truncate_mutex);
	}
	return 0;
}

int ext2_fsync(struct file *file, int datasync)
{
	int ret;
	struct super_block *sb = file->f_mapping->host->i_sb;
	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;

	ret = generic_file_fsync(file, datasync);
	if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
		/* We don't really know where the IO error happened... */
		ext2_error(sb, __func__,
			   "detected IO error when writing metadata buffers");
		ret = -EIO;
	}
	return ret;
}

/*
 * We have mostly NULL's here: the current defaults are ok for
 * the ext2 filesystem.
 */
const struct file_operations ext2_file_operations = {
	.llseek		= generic_file_llseek,
	.read		= do_sync_read,
	.write		= do_sync_write,
	.aio_read	= generic_file_aio_read,
	.aio_write	= generic_file_aio_write,
	.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= ext2_compat_ioctl,
#endif
	.mmap		= generic_file_mmap,
	.open		= dquot_file_open,
	.release	= ext2_release_file,
	.fsync		= ext2_fsync,
	.splice_read	= generic_file_splice_read,
	.splice_write	= generic_file_splice_write,
};

#ifdef CONFIG_EXT2_FS_XIP
const struct file_operations ext2_xip_file_operations = {
	.llseek		= generic_file_llseek,
	.read		= xip_file_read,
	.write		= xip_file_write,
	.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= ext2_compat_ioctl,
#endif
	.mmap		= xip_file_mmap,
	.open		= dquot_file_open,
	.release	= ext2_release_file,
	.fsync		= ext2_fsync,
};
#endif

const struct inode_operations ext2_file_inode_operations = {
#ifdef CONFIG_EXT2_FS_XATTR
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.listxattr	= ext2_listxattr,
	.removexattr	= generic_removexattr,
#endif
	.setattr	= ext2_setattr,
	.check_acl	= ext2_check_acl,
	.fiemap		= ext2_fiemap,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/ext2/file.c
	3	*
	4	* Copyright (C) 1992, 1993, 1994, 1995
	5	* Remy Card (card@masi.ibp.fr)
	6	* Laboratoire MASI - Institut Blaise Pascal
	7	* Universite Pierre et Marie Curie (Paris VI)
	8	*
	9	* from
	10	*
	11	* linux/fs/minix/file.c
	12	*
	13	* Copyright (C) 1991, 1992 Linus Torvalds
	14	*
	15	* ext2 fs regular file handling primitives
	16	*
	17	* 64-bit file support on 64-bit platforms by Jakub Jelinek
	18	* (jj@sunsite.ms.mff.cuni.cz)
	19	*/
	20
	21	#include <linux/time.h>
48bde86d	22	#include <linux/pagemap.h>
871a2931	23	#include <linux/quotaops.h>
1da177e4 LT	24	#include "ext2.h"
	25	#include "xattr.h"
	26	#include "acl.h"
	27
	28	/*
a6739af8 JK	29	* Called when filp is released. This happens when all file descriptors
	30	* for a single struct file are closed. Note that different open() calls
	31	* for the same file yield different struct file structures.
1da177e4 LT	32	*/
	33	static int ext2_release_file (struct inode * inode, struct file * filp)
	34	{
a686cd89 MB	35	if (filp->f_mode & FMODE_WRITE) {
	36	mutex_lock(&EXT2_I(inode)->truncate_mutex);
	37	ext2_discard_reservation(inode);
	38	mutex_unlock(&EXT2_I(inode)->truncate_mutex);
	39	}
1da177e4 LT	40	return 0;
	41	}
	42
7ea80859	43	int ext2_fsync(struct file *file, int datasync)
48bde86d JK	44	{
48bde86d JK	45	int ret;
7ea80859	46	struct super_block *sb = file->f_mapping->host->i_sb;
48bde86d JK	47	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
48bde86d JK	48
1b061d92	49	ret = generic_file_fsync(file, datasync);
48bde86d JK	50	if (ret == -EIO \|\| test_and_clear_bit(AS_EIO, &mapping->flags)) {
	51	/* We don't really know where the IO error happened... */
	52	ext2_error(sb, __func__,
	53	"detected IO error when writing metadata buffers");
	54	ret = -EIO;
	55	}
	56	return ret;
	57	}
	58
1da177e4 LT	59	/*
	60	* We have mostly NULL's here: the current defaults are ok for
	61	* the ext2 filesystem.
	62	*/
4b6f5d20	63	const struct file_operations ext2_file_operations = {
1da177e4	64	.llseek = generic_file_llseek,
543ade1f BP	65	.read = do_sync_read,
543ade1f BP	66	.write = do_sync_write,
1da177e4 LT	67	.aio_read = generic_file_aio_read,
1da177e4 LT	68	.aio_write = generic_file_aio_write,
14f9f7b2	69	.unlocked_ioctl = ext2_ioctl,
e322ff07 DH	70	#ifdef CONFIG_COMPAT
	71	.compat_ioctl = ext2_compat_ioctl,
	72	#endif
1da177e4	73	.mmap = generic_file_mmap,
907f4554	74	.open = dquot_file_open,
1da177e4	75	.release = ext2_release_file,
48bde86d	76	.fsync = ext2_fsync,
5274f052 JA	77	.splice_read = generic_file_splice_read,
5274f052 JA	78	.splice_write = generic_file_splice_write,
1da177e4 LT	79	};
1da177e4 LT	80
6d79125b	81	#ifdef CONFIG_EXT2_FS_XIP
4b6f5d20	82	const struct file_operations ext2_xip_file_operations = {
6d79125b	83	.llseek = generic_file_llseek,
eb6fe0c3 CO	84	.read = xip_file_read,
eb6fe0c3 CO	85	.write = xip_file_write,
14f9f7b2	86	.unlocked_ioctl = ext2_ioctl,
e322ff07 DH	87	#ifdef CONFIG_COMPAT
	88	.compat_ioctl = ext2_compat_ioctl,
	89	#endif
6d79125b	90	.mmap = xip_file_mmap,
907f4554	91	.open = dquot_file_open,
6d79125b	92	.release = ext2_release_file,
48bde86d	93	.fsync = ext2_fsync,
6d79125b CO	94	};
	95	#endif
	96
754661f1	97	const struct inode_operations ext2_file_inode_operations = {
1da177e4 LT	98	#ifdef CONFIG_EXT2_FS_XATTR
	99	.setxattr = generic_setxattr,
	100	.getxattr = generic_getxattr,
	101	.listxattr = ext2_listxattr,
	102	.removexattr = generic_removexattr,
	103	#endif
	104	.setattr = ext2_setattr,
1d5ccd1c	105	.check_acl = ext2_check_acl,
68c9d702	106	.fiemap = ext2_fiemap,
1da177e4	107	};