[deliverable/linux.git] / fs / gfs2 / ops_file.c

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/pagemap.h>
#include <linux/uio.h>
#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/gfs2_ondisk.h>
#include <linux/ext2_fs.h>
#include <linux/crc32.h>
#include <linux/lm_interface.h>
#include <linux/writeback.h>
#include <asm/uaccess.h>

#include "gfs2.h"
#include "incore.h"
#include "bmap.h"
#include "dir.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "lm.h"
#include "log.h"
#include "meta_io.h"
#include "ops_vm.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
#include "eaops.h"

/**
 * gfs2_llseek - seek to a location in a file
 * @file: the file
 * @offset: the offset
 * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
 *
 * SEEK_END requires the glock for the file because it references the
 * file's size.
 *
 * Returns: The new offset, or errno
 */

static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
{
	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
	struct gfs2_holder i_gh;
	loff_t error;

	if (origin == 2) {
		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
					   &i_gh);
		if (!error) {
			error = remote_llseek(file, offset, origin);
			gfs2_glock_dq_uninit(&i_gh);
		}
	} else
		error = remote_llseek(file, offset, origin);

	return error;
}

/**
 * gfs2_readdir - Read directory entries from a directory
 * @file: The directory to read from
 * @dirent: Buffer for dirents
 * @filldir: Function used to do the copying
 *
 * Returns: errno
 */

static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
{
	struct inode *dir = file->f_mapping->host;
	struct gfs2_inode *dip = GFS2_I(dir);
	struct gfs2_holder d_gh;
	u64 offset = file->f_pos;
	int error;

	gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
	error = gfs2_glock_nq_atime(&d_gh);
	if (error) {
		gfs2_holder_uninit(&d_gh);
		return error;
	}

	error = gfs2_dir_read(dir, &offset, dirent, filldir);

	gfs2_glock_dq_uninit(&d_gh);

	file->f_pos = offset;

	return error;
}

/**
 * fsflags_cvt
 * @table: A table of 32 u32 flags
 * @val: a 32 bit value to convert
 *
 * This function can be used to convert between fsflags values and
 * GFS2's own flags values.
 *
 * Returns: the converted flags
 */
static u32 fsflags_cvt(const u32 *table, u32 val)
{
	u32 res = 0;
	while(val) {
		if (val & 1)
			res |= *table;
		table++;
		val >>= 1;
	}
	return res;
}

static const u32 fsflags_to_gfs2[32] = {
	[3] = GFS2_DIF_SYNC,
	[4] = GFS2_DIF_IMMUTABLE,
	[5] = GFS2_DIF_APPENDONLY,
	[7] = GFS2_DIF_NOATIME,
	[12] = GFS2_DIF_EXHASH,
	[14] = GFS2_DIF_INHERIT_JDATA,
	[20] = GFS2_DIF_INHERIT_DIRECTIO,
};

static const u32 gfs2_to_fsflags[32] = {
	[gfs2fl_Sync] = FS_SYNC_FL,
	[gfs2fl_Immutable] = FS_IMMUTABLE_FL,
	[gfs2fl_AppendOnly] = FS_APPEND_FL,
	[gfs2fl_NoAtime] = FS_NOATIME_FL,
	[gfs2fl_ExHash] = FS_INDEX_FL,
	[gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
	[gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
};

static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
{
	struct inode *inode = filp->f_path.dentry->d_inode;
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_holder gh;
	int error;
	u32 fsflags;

	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
	error = gfs2_glock_nq_atime(&gh);
	if (error)
		return error;

	fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
	if (!S_ISDIR(inode->i_mode)) {
		if (ip->i_di.di_flags & GFS2_DIF_JDATA)
			fsflags |= FS_JOURNAL_DATA_FL;
		if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
			fsflags |= FS_DIRECTIO_FL;
	}
	if (put_user(fsflags, ptr))
		error = -EFAULT;

	gfs2_glock_dq_m(1, &gh);
	gfs2_holder_uninit(&gh);
	return error;
}

void gfs2_set_inode_flags(struct inode *inode)
{
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_dinode_host *di = &ip->i_di;
	unsigned int flags = inode->i_flags;

	flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
	if (di->di_flags & GFS2_DIF_IMMUTABLE)
		flags |= S_IMMUTABLE;
	if (di->di_flags & GFS2_DIF_APPENDONLY)
		flags |= S_APPEND;
	if (di->di_flags & GFS2_DIF_NOATIME)
		flags |= S_NOATIME;
	if (di->di_flags & GFS2_DIF_SYNC)
		flags |= S_SYNC;
	inode->i_flags = flags;
}

/* Flags that can be set by user space */
#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA|			\
			     GFS2_DIF_DIRECTIO|			\
			     GFS2_DIF_IMMUTABLE|		\
			     GFS2_DIF_APPENDONLY|		\
			     GFS2_DIF_NOATIME|			\
			     GFS2_DIF_SYNC|			\
			     GFS2_DIF_SYSTEM|			\
			     GFS2_DIF_INHERIT_DIRECTIO|		\
			     GFS2_DIF_INHERIT_JDATA)

/**
 * gfs2_set_flags - set flags on an inode
 * @inode: The inode
 * @flags: The flags to set
 * @mask: Indicates which flags are valid
 *
 */
static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
{
	struct inode *inode = filp->f_path.dentry->d_inode;
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_sbd *sdp = GFS2_SB(inode);
	struct buffer_head *bh;
	struct gfs2_holder gh;
	int error;
	u32 new_flags, flags;

	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
	if (error)
		return error;

	flags = ip->i_di.di_flags;
	new_flags = (flags & ~mask) | (reqflags & mask);
	if ((new_flags ^ flags) == 0)
		goto out;

	error = -EINVAL;
	if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
		goto out;

	error = -EPERM;
	if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
		goto out;
	if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
		goto out;
	if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
	    !capable(CAP_LINUX_IMMUTABLE))
		goto out;
	if (!IS_IMMUTABLE(inode)) {
		error = permission(inode, MAY_WRITE, NULL);
		if (error)
			goto out;
	}

	error = gfs2_trans_begin(sdp, RES_DINODE, 0);
	if (error)
		goto out;
	error = gfs2_meta_inode_buffer(ip, &bh);
	if (error)
		goto out_trans_end;
	gfs2_trans_add_bh(ip->i_gl, bh, 1);
	ip->i_di.di_flags = new_flags;
	gfs2_dinode_out(ip, bh->b_data);
	brelse(bh);
	gfs2_set_inode_flags(inode);
out_trans_end:
	gfs2_trans_end(sdp);
out:
	gfs2_glock_dq_uninit(&gh);
	return error;
}

static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
{
	struct inode *inode = filp->f_path.dentry->d_inode;
	u32 fsflags, gfsflags;
	if (get_user(fsflags, ptr))
		return -EFAULT;
	gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
	if (!S_ISDIR(inode->i_mode)) {
		if (gfsflags & GFS2_DIF_INHERIT_JDATA)
			gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
		if (gfsflags & GFS2_DIF_INHERIT_DIRECTIO)
			gfsflags ^= (GFS2_DIF_DIRECTIO | GFS2_DIF_INHERIT_DIRECTIO);
		return do_gfs2_set_flags(filp, gfsflags, ~0);
	}
	return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
}

static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	switch(cmd) {
	case FS_IOC_GETFLAGS:
		return gfs2_get_flags(filp, (u32 __user *)arg);
	case FS_IOC_SETFLAGS:
		return gfs2_set_flags(filp, (u32 __user *)arg);
	}
	return -ENOTTY;
}


/**
 * gfs2_mmap -
 * @file: The file to map
 * @vma: The VMA which described the mapping
 *
 * Returns: 0 or error code
 */

static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
	struct gfs2_holder i_gh;
	int error;

	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
	error = gfs2_glock_nq_atime(&i_gh);
	if (error) {
		gfs2_holder_uninit(&i_gh);
		return error;
	}

	/* This is VM_MAYWRITE instead of VM_WRITE because a call
	   to mprotect() can turn on VM_WRITE later. */

	if ((vma->vm_flags & (VM_MAYSHARE | VM_MAYWRITE)) ==
	    (VM_MAYSHARE | VM_MAYWRITE))
		vma->vm_ops = &gfs2_vm_ops_sharewrite;
	else
		vma->vm_ops = &gfs2_vm_ops_private;

	gfs2_glock_dq_uninit(&i_gh);

	return error;
}

/**
 * gfs2_open - open a file
 * @inode: the inode to open
 * @file: the struct file for this opening
 *
 * Returns: errno
 */

static int gfs2_open(struct inode *inode, struct file *file)
{
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_holder i_gh;
	struct gfs2_file *fp;
	int error;

	fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL);
	if (!fp)
		return -ENOMEM;

	mutex_init(&fp->f_fl_mutex);

	gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
	file->private_data = fp;

	if (S_ISREG(ip->i_inode.i_mode)) {
		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
					   &i_gh);
		if (error)
			goto fail;

		if (!(file->f_flags & O_LARGEFILE) &&
		    ip->i_di.di_size > MAX_NON_LFS) {
			error = -EOVERFLOW;
			goto fail_gunlock;
		}

		/* Listen to the Direct I/O flag */

		if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
			file->f_flags |= O_DIRECT;

		gfs2_glock_dq_uninit(&i_gh);
	}

	return 0;

fail_gunlock:
	gfs2_glock_dq_uninit(&i_gh);
fail:
	file->private_data = NULL;
	kfree(fp);
	return error;
}

/**
 * gfs2_close - called to close a struct file
 * @inode: the inode the struct file belongs to
 * @file: the struct file being closed
 *
 * Returns: errno
 */

static int gfs2_close(struct inode *inode, struct file *file)
{
	struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
	struct gfs2_file *fp;

	fp = file->private_data;
	file->private_data = NULL;

	if (gfs2_assert_warn(sdp, fp))
		return -EIO;

	kfree(fp);

	return 0;
}

/**
 * gfs2_fsync - sync the dirty data for a file (across the cluster)
 * @file: the file that points to the dentry (we ignore this)
 * @dentry: the dentry that points to the inode to sync
 *
 * The VFS will flush "normal" data for us. We only need to worry
 * about metadata here. For journaled data, we just do a log flush
 * as we can't avoid it. Otherwise we can just bale out if datasync
 * is set. For stuffed inodes we must flush the log in order to
 * ensure that all data is on disk.
 *
 * The call to write_inode_now() is there to write back metadata and
 * the inode itself. It does also try and write the data, but thats
 * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite()
 * for us.
 *
 * Returns: errno
 */

static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
{
	struct inode *inode = dentry->d_inode;
	int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC);
	int ret = 0;

	if (gfs2_is_jdata(GFS2_I(inode))) {
		gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
		return 0;
	}

	if (sync_state != 0) {
		if (!datasync)
			ret = write_inode_now(inode, 0);

		if (gfs2_is_stuffed(GFS2_I(inode)))
			gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
	}

	return ret;
}

/**
 * gfs2_setlease - acquire/release a file lease
 * @file: the file pointer
 * @arg: lease type
 * @fl: file lock
 *
 * Returns: errno
 */

static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
{
	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);

	/*
	 * We don't currently have a way to enforce a lease across the whole
	 * cluster; until we do, disable leases (by just returning -EINVAL),
	 * unless the administrator has requested purely local locking.
	 */
	if (!sdp->sd_args.ar_localflocks)
		return -EINVAL;
	return generic_setlease(file, arg, fl);
}

/**
 * gfs2_lock - acquire/release a posix lock on a file
 * @file: the file pointer
 * @cmd: either modify or retrieve lock state, possibly wait
 * @fl: type and range of lock
 *
 * Returns: errno
 */

static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
{
	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
	struct lm_lockname name =
		{ .ln_number = ip->i_no_addr,
		  .ln_type = LM_TYPE_PLOCK };

	if (!(fl->fl_flags & FL_POSIX))
		return -ENOLCK;
	if (__mandatory_lock(&ip->i_inode))
		return -ENOLCK;

	if (sdp->sd_args.ar_localflocks) {
		if (IS_GETLK(cmd)) {
			posix_test_lock(file, fl);
			return 0;
		} else {
			return posix_lock_file_wait(file, fl);
		}
	}

	if (cmd == F_CANCELLK) {
		/* Hack: */
		cmd = F_SETLK;
		fl->fl_type = F_UNLCK;
	}
	if (IS_GETLK(cmd))
		return gfs2_lm_plock_get(sdp, &name, file, fl);
	else if (fl->fl_type == F_UNLCK)
		return gfs2_lm_punlock(sdp, &name, file, fl);
	else
		return gfs2_lm_plock(sdp, &name, file, cmd, fl);
}

static int do_flock(struct file *file, int cmd, struct file_lock *fl)
{
	struct gfs2_file *fp = file->private_data;
	struct gfs2_holder *fl_gh = &fp->f_fl_gh;
	struct gfs2_inode *ip = GFS2_I(file->f_path.dentry->d_inode);
	struct gfs2_glock *gl;
	unsigned int state;
	int flags;
	int error = 0;

	state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
	flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE 
		| GL_FLOCK;

	mutex_lock(&fp->f_fl_mutex);

	gl = fl_gh->gh_gl;
	if (gl) {
		if (fl_gh->gh_state == state)
			goto out;
		flock_lock_file_wait(file,
				     &(struct file_lock){.fl_type = F_UNLCK});
		gfs2_glock_dq_wait(fl_gh);
		gfs2_holder_reinit(state, flags, fl_gh);
	} else {
		error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
				      ip->i_no_addr, &gfs2_flock_glops,
				      CREATE, &gl);
		if (error)
			goto out;
		gfs2_holder_init(gl, state, flags, fl_gh);
		gfs2_glock_put(gl);
	}
	error = gfs2_glock_nq(fl_gh);
	if (error) {
		gfs2_holder_uninit(fl_gh);
		if (error == GLR_TRYFAILED)
			error = -EAGAIN;
	} else {
		error = flock_lock_file_wait(file, fl);
		gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
	}

out:
	mutex_unlock(&fp->f_fl_mutex);
	return error;
}

static void do_unflock(struct file *file, struct file_lock *fl)
{
	struct gfs2_file *fp = file->private_data;
	struct gfs2_holder *fl_gh = &fp->f_fl_gh;

	mutex_lock(&fp->f_fl_mutex);
	flock_lock_file_wait(file, fl);
	if (fl_gh->gh_gl)
		gfs2_glock_dq_uninit(fl_gh);
	mutex_unlock(&fp->f_fl_mutex);
}

/**
 * gfs2_flock - acquire/release a flock lock on a file
 * @file: the file pointer
 * @cmd: either modify or retrieve lock state, possibly wait
 * @fl: type and range of lock
 *
 * Returns: errno
 */

static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
{
	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);

	if (!(fl->fl_flags & FL_FLOCK))
		return -ENOLCK;
	if (__mandatory_lock(&ip->i_inode))
		return -ENOLCK;

	if (sdp->sd_args.ar_localflocks)
		return flock_lock_file_wait(file, fl);

	if (fl->fl_type == F_UNLCK) {
		do_unflock(file, fl);
		return 0;
	} else {
		return do_flock(file, cmd, fl);
	}
}

const struct file_operations gfs2_file_fops = {
	.llseek		= gfs2_llseek,
	.read		= do_sync_read,
	.aio_read	= generic_file_aio_read,
	.write		= do_sync_write,
	.aio_write	= generic_file_aio_write,
	.unlocked_ioctl	= gfs2_ioctl,
	.mmap		= gfs2_mmap,
	.open		= gfs2_open,
	.release	= gfs2_close,
	.fsync		= gfs2_fsync,
	.lock		= gfs2_lock,
	.flock		= gfs2_flock,
	.splice_read	= generic_file_splice_read,
	.splice_write	= generic_file_splice_write,
	.setlease	= gfs2_setlease,
};

const struct file_operations gfs2_dir_fops = {
	.readdir	= gfs2_readdir,
	.unlocked_ioctl	= gfs2_ioctl,
	.open		= gfs2_open,
	.release	= gfs2_close,
	.fsync		= gfs2_fsync,
	.lock		= gfs2_lock,
	.flock		= gfs2_flock,
};
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
b3b94faa DT	9
b3b94faa DT	10	#include <linux/slab.h>
	11	#include <linux/spinlock.h>
	12	#include <linux/completion.h>
	13	#include <linux/buffer_head.h>
	14	#include <linux/pagemap.h>
	15	#include <linux/uio.h>
	16	#include <linux/blkdev.h>
	17	#include <linux/mm.h>
18ec7d5c	18	#include <linux/fs.h>
5c676f6d	19	#include <linux/gfs2_ondisk.h>
71b86f56 SW	20	#include <linux/ext2_fs.h>
71b86f56 SW	21	#include <linux/crc32.h>
7d308590	22	#include <linux/lm_interface.h>
33c3de32	23	#include <linux/writeback.h>
b3b94faa DT	24	#include <asm/uaccess.h>
	25
	26	#include "gfs2.h"
5c676f6d	27	#include "incore.h"
b3b94faa DT	28	#include "bmap.h"
	29	#include "dir.h"
	30	#include "glock.h"
	31	#include "glops.h"
	32	#include "inode.h"
b3b94faa DT	33	#include "lm.h"
	34	#include "log.h"
	35	#include "meta_io.h"
b3b94faa DT	36	#include "ops_vm.h"
	37	#include "quota.h"
	38	#include "rgrp.h"
	39	#include "trans.h"
5c676f6d	40	#include "util.h"
71b86f56	41	#include "eaops.h"
b3b94faa	42
b3b94faa DT	43	/**
	44	* gfs2_llseek - seek to a location in a file
	45	* @file: the file
	46	* @offset: the offset
	47	* @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
	48	*
	49	* SEEK_END requires the glock for the file because it references the
	50	* file's size.
	51	*
	52	* Returns: The new offset, or errno
	53	*/
	54
	55	static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
	56	{
feaa7bba	57	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
b3b94faa DT	58	struct gfs2_holder i_gh;
	59	loff_t error;
	60
b3b94faa DT	61	if (origin == 2) {
	62	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
	63	&i_gh);
	64	if (!error) {
	65	error = remote_llseek(file, offset, origin);
	66	gfs2_glock_dq_uninit(&i_gh);
	67	}
	68	} else
	69	error = remote_llseek(file, offset, origin);
	70
	71	return error;
	72	}
	73
b3b94faa	74	/**
f0e522a9	75	* gfs2_readdir - Read directory entries from a directory
b3b94faa DT	76	* @file: The directory to read from
	77	* @dirent: Buffer for dirents
	78	* @filldir: Function used to do the copying
	79	*
	80	* Returns: errno
	81	*/
	82
f0e522a9	83	static int gfs2_readdir(struct file file, void dirent, filldir_t filldir)
b3b94faa	84	{
71b86f56	85	struct inode *dir = file->f_mapping->host;
feaa7bba	86	struct gfs2_inode *dip = GFS2_I(dir);
b3b94faa	87	struct gfs2_holder d_gh;
cd915493	88	u64 offset = file->f_pos;
b3b94faa DT	89	int error;
b3b94faa DT	90
b3b94faa DT	91	gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
	92	error = gfs2_glock_nq_atime(&d_gh);
	93	if (error) {
	94	gfs2_holder_uninit(&d_gh);
	95	return error;
	96	}
	97
3699e3a4	98	error = gfs2_dir_read(dir, &offset, dirent, filldir);
b3b94faa DT	99
	100	gfs2_glock_dq_uninit(&d_gh);
	101
b3b94faa DT	102	file->f_pos = offset;
b3b94faa DT	103
b3b94faa DT	104	return error;
	105	}
	106
128e5eba SW	107	/**
	108	* fsflags_cvt
	109	* @table: A table of 32 u32 flags
	110	* @val: a 32 bit value to convert
	111	*
	112	* This function can be used to convert between fsflags values and
	113	* GFS2's own flags values.
	114	*
	115	* Returns: the converted flags
	116	*/
	117	static u32 fsflags_cvt(const u32 *table, u32 val)
	118	{
	119	u32 res = 0;
	120	while(val) {
	121	if (val & 1)
	122	res \|= *table;
	123	table++;
	124	val >>= 1;
	125	}
	126	return res;
	127	}
b3b94faa	128
128e5eba SW	129	static const u32 fsflags_to_gfs2[32] = {
	130	[3] = GFS2_DIF_SYNC,
	131	[4] = GFS2_DIF_IMMUTABLE,
	132	[5] = GFS2_DIF_APPENDONLY,
	133	[7] = GFS2_DIF_NOATIME,
	134	[12] = GFS2_DIF_EXHASH,
b9af7ca6 SW	135	[14] = GFS2_DIF_INHERIT_JDATA,
b9af7ca6 SW	136	[20] = GFS2_DIF_INHERIT_DIRECTIO,
71b86f56 SW	137	};
71b86f56 SW	138
128e5eba SW	139	static const u32 gfs2_to_fsflags[32] = {
	140	[gfs2fl_Sync] = FS_SYNC_FL,
	141	[gfs2fl_Immutable] = FS_IMMUTABLE_FL,
	142	[gfs2fl_AppendOnly] = FS_APPEND_FL,
	143	[gfs2fl_NoAtime] = FS_NOATIME_FL,
	144	[gfs2fl_ExHash] = FS_INDEX_FL,
128e5eba SW	145	[gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
128e5eba SW	146	[gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
7ea9ea83	147	};
71b86f56	148
b09e593d	149	static int gfs2_get_flags(struct file filp, u32 __user ptr)
71b86f56	150	{
81454098	151	struct inode *inode = filp->f_path.dentry->d_inode;
feaa7bba	152	struct gfs2_inode *ip = GFS2_I(inode);
71b86f56 SW	153	struct gfs2_holder gh;
71b86f56 SW	154	int error;
128e5eba	155	u32 fsflags;
71b86f56 SW	156
71b86f56 SW	157	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
dcd24799	158	error = gfs2_glock_nq_atime(&gh);
71b86f56 SW	159	if (error)
71b86f56 SW	160	return error;
907b9bce	161
128e5eba	162	fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
b9af7ca6 SW	163	if (!S_ISDIR(inode->i_mode)) {
	164	if (ip->i_di.di_flags & GFS2_DIF_JDATA)
	165	fsflags \|= FS_JOURNAL_DATA_FL;
	166	if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
	167	fsflags \|= FS_DIRECTIO_FL;
	168	}
128e5eba	169	if (put_user(fsflags, ptr))
71b86f56 SW	170	error = -EFAULT;
	171
	172	gfs2_glock_dq_m(1, &gh);
	173	gfs2_holder_uninit(&gh);
	174	return error;
	175	}
	176
6b124d8d SW	177	void gfs2_set_inode_flags(struct inode *inode)
	178	{
	179	struct gfs2_inode *ip = GFS2_I(inode);
	180	struct gfs2_dinode_host *di = &ip->i_di;
	181	unsigned int flags = inode->i_flags;
	182
	183	flags &= ~(S_SYNC\|S_APPEND\|S_IMMUTABLE\|S_NOATIME\|S_DIRSYNC);
	184	if (di->di_flags & GFS2_DIF_IMMUTABLE)
	185	flags \|= S_IMMUTABLE;
	186	if (di->di_flags & GFS2_DIF_APPENDONLY)
	187	flags \|= S_APPEND;
	188	if (di->di_flags & GFS2_DIF_NOATIME)
	189	flags \|= S_NOATIME;
	190	if (di->di_flags & GFS2_DIF_SYNC)
	191	flags \|= S_SYNC;
	192	inode->i_flags = flags;
	193	}
	194
71b86f56 SW	195	/* Flags that can be set by user space */
	196	#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA\| \
	197	GFS2_DIF_DIRECTIO\| \
	198	GFS2_DIF_IMMUTABLE\| \
	199	GFS2_DIF_APPENDONLY\| \
	200	GFS2_DIF_NOATIME\| \
	201	GFS2_DIF_SYNC\| \
	202	GFS2_DIF_SYSTEM\| \
	203	GFS2_DIF_INHERIT_DIRECTIO\| \
	204	GFS2_DIF_INHERIT_JDATA)
	205
	206	/**
	207	* gfs2_set_flags - set flags on an inode
	208	* @inode: The inode
	209	* @flags: The flags to set
	210	* @mask: Indicates which flags are valid
	211	*
	212	*/
b09e593d	213	static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
71b86f56	214	{
81454098	215	struct inode *inode = filp->f_path.dentry->d_inode;
feaa7bba SW	216	struct gfs2_inode *ip = GFS2_I(inode);
feaa7bba SW	217	struct gfs2_sbd *sdp = GFS2_SB(inode);
71b86f56 SW	218	struct buffer_head *bh;
	219	struct gfs2_holder gh;
	220	int error;
55eccc6d	221	u32 new_flags, flags;
71b86f56	222
71b86f56	223	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
52f341cf	224	if (error)
71b86f56 SW	225	return error;
71b86f56 SW	226
55eccc6d SW	227	flags = ip->i_di.di_flags;
55eccc6d SW	228	new_flags = (flags & ~mask) \| (reqflags & mask);
71b86f56 SW	229	if ((new_flags ^ flags) == 0)
	230	goto out;
	231
	232	error = -EINVAL;
	233	if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
	234	goto out;
	235
71b86f56 SW	236	error = -EPERM;
	237	if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
	238	goto out;
	239	if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
	240	goto out;
907b9bce	241	if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
b9cb9813	242	!capable(CAP_LINUX_IMMUTABLE))
71b86f56	243	goto out;
b9cb9813	244	if (!IS_IMMUTABLE(inode)) {
faf450ef	245	error = permission(inode, MAY_WRITE, NULL);
b9cb9813 SW	246	if (error)
	247	goto out;
	248	}
71b86f56	249
55eccc6d	250	error = gfs2_trans_begin(sdp, RES_DINODE, 0);
71b86f56 SW	251	if (error)
71b86f56 SW	252	goto out;
55eccc6d SW	253	error = gfs2_meta_inode_buffer(ip, &bh);
	254	if (error)
	255	goto out_trans_end;
71b86f56 SW	256	gfs2_trans_add_bh(ip->i_gl, bh, 1);
71b86f56 SW	257	ip->i_di.di_flags = new_flags;
539e5d6b	258	gfs2_dinode_out(ip, bh->b_data);
71b86f56	259	brelse(bh);
6b124d8d	260	gfs2_set_inode_flags(inode);
55eccc6d SW	261	out_trans_end:
55eccc6d SW	262	gfs2_trans_end(sdp);
71b86f56 SW	263	out:
	264	gfs2_glock_dq_uninit(&gh);
	265	return error;
	266	}
	267
b09e593d	268	static int gfs2_set_flags(struct file filp, u32 __user ptr)
71b86f56	269	{
b9af7ca6	270	struct inode *inode = filp->f_path.dentry->d_inode;
128e5eba SW	271	u32 fsflags, gfsflags;
128e5eba SW	272	if (get_user(fsflags, ptr))
71b86f56	273	return -EFAULT;
128e5eba	274	gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
b9af7ca6 SW	275	if (!S_ISDIR(inode->i_mode)) {
	276	if (gfsflags & GFS2_DIF_INHERIT_JDATA)
	277	gfsflags ^= (GFS2_DIF_JDATA \| GFS2_DIF_INHERIT_JDATA);
	278	if (gfsflags & GFS2_DIF_INHERIT_DIRECTIO)
	279	gfsflags ^= (GFS2_DIF_DIRECTIO \| GFS2_DIF_INHERIT_DIRECTIO);
	280	return do_gfs2_set_flags(filp, gfsflags, ~0);
	281	}
	282	return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
71b86f56 SW	283	}
71b86f56 SW	284
b09e593d	285	static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
71b86f56 SW	286	{
71b86f56 SW	287	switch(cmd) {
128e5eba	288	case FS_IOC_GETFLAGS:
b09e593d	289	return gfs2_get_flags(filp, (u32 __user *)arg);
128e5eba	290	case FS_IOC_SETFLAGS:
b09e593d	291	return gfs2_set_flags(filp, (u32 __user *)arg);
71b86f56 SW	292	}
	293	return -ENOTTY;
	294	}
	295
	296
b3b94faa DT	297	/**
	298	* gfs2_mmap -
	299	* @file: The file to map
	300	* @vma: The VMA which described the mapping
	301	*
	302	* Returns: 0 or error code
	303	*/
	304
	305	static int gfs2_mmap(struct file file, struct vm_area_struct vma)
	306	{
feaa7bba	307	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
b3b94faa DT	308	struct gfs2_holder i_gh;
	309	int error;
	310
b3b94faa DT	311	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
	312	error = gfs2_glock_nq_atime(&i_gh);
	313	if (error) {
	314	gfs2_holder_uninit(&i_gh);
	315	return error;
	316	}
	317
18ec7d5c SW	318	/* This is VM_MAYWRITE instead of VM_WRITE because a call
	319	to mprotect() can turn on VM_WRITE later. */
	320
	321	if ((vma->vm_flags & (VM_MAYSHARE \| VM_MAYWRITE)) ==
	322	(VM_MAYSHARE \| VM_MAYWRITE))
	323	vma->vm_ops = &gfs2_vm_ops_sharewrite;
	324	else
	325	vma->vm_ops = &gfs2_vm_ops_private;
b3b94faa DT	326
	327	gfs2_glock_dq_uninit(&i_gh);
	328
	329	return error;
	330	}
	331
	332	/**
	333	* gfs2_open - open a file
	334	* @inode: the inode to open
	335	* @file: the struct file for this opening
	336	*
	337	* Returns: errno
	338	*/
	339
	340	static int gfs2_open(struct inode inode, struct file file)
	341	{
feaa7bba	342	struct gfs2_inode *ip = GFS2_I(inode);
b3b94faa DT	343	struct gfs2_holder i_gh;
	344	struct gfs2_file *fp;
	345	int error;
	346
b3b94faa DT	347	fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL);
	348	if (!fp)
	349	return -ENOMEM;
	350
f55ab26a	351	mutex_init(&fp->f_fl_mutex);
b3b94faa	352
feaa7bba	353	gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
5c676f6d	354	file->private_data = fp;
b3b94faa	355
b60623c2	356	if (S_ISREG(ip->i_inode.i_mode)) {
b3b94faa DT	357	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
	358	&i_gh);
	359	if (error)
	360	goto fail;
	361
	362	if (!(file->f_flags & O_LARGEFILE) &&
	363	ip->i_di.di_size > MAX_NON_LFS) {
a9c62a18	364	error = -EOVERFLOW;
b3b94faa DT	365	goto fail_gunlock;
	366	}
	367
	368	/* Listen to the Direct I/O flag */
	369
	370	if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
	371	file->f_flags \|= O_DIRECT;
	372
b3b94faa DT	373	gfs2_glock_dq_uninit(&i_gh);
	374	}
	375
	376	return 0;
	377
420b9e5e	378	fail_gunlock:
b3b94faa	379	gfs2_glock_dq_uninit(&i_gh);
420b9e5e	380	fail:
5c676f6d	381	file->private_data = NULL;
b3b94faa	382	kfree(fp);
b3b94faa DT	383	return error;
	384	}
	385
	386	/**
	387	* gfs2_close - called to close a struct file
	388	* @inode: the inode the struct file belongs to
	389	* @file: the struct file being closed
	390	*
	391	* Returns: errno
	392	*/
	393
	394	static int gfs2_close(struct inode inode, struct file file)
	395	{
5c676f6d	396	struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
b3b94faa DT	397	struct gfs2_file *fp;
b3b94faa DT	398
5c676f6d SW	399	fp = file->private_data;
5c676f6d SW	400	file->private_data = NULL;
b3b94faa DT	401
	402	if (gfs2_assert_warn(sdp, fp))
	403	return -EIO;
	404
	405	kfree(fp);
	406
	407	return 0;
	408	}
	409
	410	/**
	411	* gfs2_fsync - sync the dirty data for a file (across the cluster)
	412	* @file: the file that points to the dentry (we ignore this)
	413	* @dentry: the dentry that points to the inode to sync
	414	*
33c3de32 SW	415	* The VFS will flush "normal" data for us. We only need to worry
	416	* about metadata here. For journaled data, we just do a log flush
	417	* as we can't avoid it. Otherwise we can just bale out if datasync
	418	* is set. For stuffed inodes we must flush the log in order to
	419	* ensure that all data is on disk.
	420	*
34126f9f SW	421	* The call to write_inode_now() is there to write back metadata and
	422	* the inode itself. It does also try and write the data, but thats
	423	* (hopefully) a no-op due to the VFS having already called filemap_fdatawrite()
	424	* for us.
	425	*
b3b94faa DT	426	* Returns: errno
	427	*/
	428
	429	static int gfs2_fsync(struct file file, struct dentry dentry, int datasync)
	430	{
33c3de32 SW	431	struct inode *inode = dentry->d_inode;
	432	int sync_state = inode->i_state & (I_DIRTY_SYNC\|I_DIRTY_DATASYNC);
	433	int ret = 0;
33c3de32 SW	434
	435	if (gfs2_is_jdata(GFS2_I(inode))) {
	436	gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
	437	return 0;
	438	}
b3b94faa	439
33c3de32 SW	440	if (sync_state != 0) {
33c3de32 SW	441	if (!datasync)
34126f9f	442	ret = write_inode_now(inode, 0);
b3b94faa	443
33c3de32 SW	444	if (gfs2_is_stuffed(GFS2_I(inode)))
	445	gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
	446	}
	447
	448	return ret;
b3b94faa DT	449	}
b3b94faa DT	450
60446067 ME	451	/**
	452	* gfs2_setlease - acquire/release a file lease
	453	* @file: the file pointer
	454	* @arg: lease type
	455	* @fl: file lock
	456	*
	457	* Returns: errno
	458	*/
	459
	460	static int gfs2_setlease(struct file file, long arg, struct file_lock *fl)
	461	{
	462	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
	463
	464	/*
	465	* We don't currently have a way to enforce a lease across the whole
	466	* cluster; until we do, disable leases (by just returning -EINVAL),
	467	* unless the administrator has requested purely local locking.
	468	*/
	469	if (!sdp->sd_args.ar_localflocks)
	470	return -EINVAL;
0af1a450	471	return generic_setlease(file, arg, fl);
60446067 ME	472	}
60446067 ME	473
b3b94faa DT	474	/**
	475	* gfs2_lock - acquire/release a posix lock on a file
	476	* @file: the file pointer
	477	* @cmd: either modify or retrieve lock state, possibly wait
	478	* @fl: type and range of lock
	479	*
	480	* Returns: errno
	481	*/
	482
	483	static int gfs2_lock(struct file file, int cmd, struct file_lock fl)
	484	{
feaa7bba SW	485	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
feaa7bba SW	486	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
b3b94faa	487	struct lm_lockname name =
dbb7cae2	488	{ .ln_number = ip->i_no_addr,
b3b94faa DT	489	.ln_type = LM_TYPE_PLOCK };
b3b94faa DT	490
b3b94faa DT	491	if (!(fl->fl_flags & FL_POSIX))
b3b94faa DT	492	return -ENOLCK;
7afaac62	493	if (__mandatory_lock(&ip->i_inode))
b3b94faa DT	494	return -ENOLCK;
	495
	496	if (sdp->sd_args.ar_localflocks) {
	497	if (IS_GETLK(cmd)) {
9d6a8c5c	498	posix_test_lock(file, fl);
b3b94faa DT	499	return 0;
b3b94faa DT	500	} else {
8628de05	501	return posix_lock_file_wait(file, fl);
b3b94faa DT	502	}
	503	}
	504
586759f0 ME	505	if (cmd == F_CANCELLK) {
	506	/* Hack: */
	507	cmd = F_SETLK;
	508	fl->fl_type = F_UNLCK;
	509	}
b3b94faa DT	510	if (IS_GETLK(cmd))
	511	return gfs2_lm_plock_get(sdp, &name, file, fl);
	512	else if (fl->fl_type == F_UNLCK)
	513	return gfs2_lm_punlock(sdp, &name, file, fl);
	514	else
	515	return gfs2_lm_plock(sdp, &name, file, cmd, fl);
	516	}
	517
b3b94faa DT	518	static int do_flock(struct file file, int cmd, struct file_lock fl)
b3b94faa DT	519	{
5c676f6d	520	struct gfs2_file *fp = file->private_data;
b3b94faa	521	struct gfs2_holder *fl_gh = &fp->f_fl_gh;
81454098	522	struct gfs2_inode *ip = GFS2_I(file->f_path.dentry->d_inode);
b3b94faa DT	523	struct gfs2_glock *gl;
	524	unsigned int state;
	525	int flags;
	526	int error = 0;
	527
	528	state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
b4c20166 AD	529	flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) \| GL_EXACT \| GL_NOCACHE
b4c20166 AD	530	\| GL_FLOCK;
b3b94faa	531
f55ab26a	532	mutex_lock(&fp->f_fl_mutex);
b3b94faa DT	533
	534	gl = fl_gh->gh_gl;
	535	if (gl) {
	536	if (fl_gh->gh_state == state)
	537	goto out;
b3b94faa	538	flock_lock_file_wait(file,
907b9bce	539	&(struct file_lock){.fl_type = F_UNLCK});
b4c20166 AD	540	gfs2_glock_dq_wait(fl_gh);
b4c20166 AD	541	gfs2_holder_reinit(state, flags, fl_gh);
b3b94faa	542	} else {
feaa7bba	543	error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
dbb7cae2	544	ip->i_no_addr, &gfs2_flock_glops,
b3b94faa DT	545	CREATE, &gl);
	546	if (error)
	547	goto out;
b4c20166 AD	548	gfs2_holder_init(gl, state, flags, fl_gh);
b4c20166 AD	549	gfs2_glock_put(gl);
b3b94faa	550	}
b3b94faa DT	551	error = gfs2_glock_nq(fl_gh);
	552	if (error) {
	553	gfs2_holder_uninit(fl_gh);
	554	if (error == GLR_TRYFAILED)
	555	error = -EAGAIN;
	556	} else {
	557	error = flock_lock_file_wait(file, fl);
feaa7bba	558	gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
b3b94faa DT	559	}
b3b94faa DT	560
420b9e5e	561	out:
f55ab26a	562	mutex_unlock(&fp->f_fl_mutex);
b3b94faa DT	563	return error;
	564	}
	565
	566	static void do_unflock(struct file file, struct file_lock fl)
	567	{
5c676f6d	568	struct gfs2_file *fp = file->private_data;
b3b94faa DT	569	struct gfs2_holder *fl_gh = &fp->f_fl_gh;
b3b94faa DT	570
f55ab26a	571	mutex_lock(&fp->f_fl_mutex);
b3b94faa DT	572	flock_lock_file_wait(file, fl);
	573	if (fl_gh->gh_gl)
	574	gfs2_glock_dq_uninit(fl_gh);
f55ab26a	575	mutex_unlock(&fp->f_fl_mutex);
b3b94faa DT	576	}
	577
	578	/**
	579	* gfs2_flock - acquire/release a flock lock on a file
	580	* @file: the file pointer
	581	* @cmd: either modify or retrieve lock state, possibly wait
	582	* @fl: type and range of lock
	583	*
	584	* Returns: errno
	585	*/
	586
	587	static int gfs2_flock(struct file file, int cmd, struct file_lock fl)
	588	{
feaa7bba SW	589	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
feaa7bba SW	590	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
b3b94faa	591
b3b94faa DT	592	if (!(fl->fl_flags & FL_FLOCK))
b3b94faa DT	593	return -ENOLCK;
7afaac62	594	if (__mandatory_lock(&ip->i_inode))
b3b94faa DT	595	return -ENOLCK;
	596
	597	if (sdp->sd_args.ar_localflocks)
	598	return flock_lock_file_wait(file, fl);
	599
	600	if (fl->fl_type == F_UNLCK) {
	601	do_unflock(file, fl);
	602	return 0;
d00223f1	603	} else {
b3b94faa	604	return do_flock(file, cmd, fl);
d00223f1	605	}
b3b94faa DT	606	}
b3b94faa DT	607
b0dd9308	608	const struct file_operations gfs2_file_fops = {
26c1a574	609	.llseek = gfs2_llseek,
d00223f1	610	.read = do_sync_read,
26c1a574	611	.aio_read = generic_file_aio_read,
d00223f1	612	.write = do_sync_write,
26c1a574 SW	613	.aio_write = generic_file_aio_write,
	614	.unlocked_ioctl = gfs2_ioctl,
	615	.mmap = gfs2_mmap,
	616	.open = gfs2_open,
	617	.release = gfs2_close,
	618	.fsync = gfs2_fsync,
	619	.lock = gfs2_lock,
26c1a574 SW	620	.flock = gfs2_flock,
	621	.splice_read = generic_file_splice_read,
	622	.splice_write = generic_file_splice_write,
60446067	623	.setlease = gfs2_setlease,
b3b94faa DT	624	};
b3b94faa DT	625
b0dd9308	626	const struct file_operations gfs2_dir_fops = {
26c1a574 SW	627	.readdir = gfs2_readdir,
	628	.unlocked_ioctl = gfs2_ioctl,
	629	.open = gfs2_open,
	630	.release = gfs2_close,
	631	.fsync = gfs2_fsync,
	632	.lock = gfs2_lock,
	633	.flock = gfs2_flock,
b3b94faa DT	634	};
b3b94faa DT	635