51f0bbe425
The Linux specific super block operations have all been located in the file zpl_super.c. These functions primarily rely on the reworked zfs_* functions to do their job. They are also responsible for converting the possible Solaris style error codes to negative Linux errors.
169 lines
3.5 KiB
C
169 lines
3.5 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright (c) 2011, Lawrence Livermore National Security, LLC.
|
|
*/
|
|
|
|
|
|
#include <sys/zfs_vfsops.h>
|
|
#include <sys/zfs_vnops.h>
|
|
#include <sys/zfs_znode.h>
|
|
#include <sys/zpl.h>
|
|
|
|
|
|
static struct inode *
|
|
zpl_inode_alloc(struct super_block *sb)
|
|
{
|
|
struct inode *ip;
|
|
|
|
VERIFY3S(zfs_inode_alloc(sb, &ip), ==, 0);
|
|
ip->i_version = 1;
|
|
|
|
return (ip);
|
|
}
|
|
|
|
static void
|
|
zpl_inode_destroy(struct inode *ip)
|
|
{
|
|
ASSERT(atomic_read(&ip->i_count) == 0);
|
|
zfs_inode_destroy(ip);
|
|
}
|
|
|
|
static void
|
|
zpl_inode_delete(struct inode *ip)
|
|
{
|
|
loff_t oldsize = i_size_read(ip);
|
|
|
|
i_size_write(ip, 0);
|
|
truncate_pagecache(ip, oldsize, 0);
|
|
clear_inode(ip);
|
|
}
|
|
|
|
static void
|
|
zpl_evict_inode(struct inode *ip)
|
|
{
|
|
zfs_inactive(ip);
|
|
}
|
|
|
|
static void
|
|
zpl_put_super(struct super_block *sb)
|
|
{
|
|
int error;
|
|
|
|
error = -zfs_umount(sb);
|
|
ASSERT3S(error, <=, 0);
|
|
}
|
|
|
|
static int
|
|
zpl_statfs(struct dentry *dentry, struct kstatfs *statp)
|
|
{
|
|
int error;
|
|
|
|
error = -zfs_statvfs(dentry, statp);
|
|
ASSERT3S(error, <=, 0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
zpl_show_options(struct seq_file *seq, struct vfsmount *vfsp)
|
|
{
|
|
struct super_block *sb = vfsp->mnt_sb;
|
|
zfs_sb_t *zsb = sb->s_fs_info;
|
|
|
|
/*
|
|
* The Linux VFS automatically handles the following flags:
|
|
* MNT_NOSUID, MNT_NODEV, MNT_NOEXEC, MNT_NOATIME, MNT_READONLY
|
|
*/
|
|
|
|
if (zsb->z_flags & ZSB_XATTR_USER)
|
|
seq_printf(seq, ",%s", "xattr");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
zpl_fill_super(struct super_block *sb, void *data, int silent)
|
|
{
|
|
int error;
|
|
|
|
error = -zfs_domount(sb, data, silent);
|
|
ASSERT3S(error, <=, 0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
zpl_get_sb(struct file_system_type *fs_type, int flags,
|
|
const char *osname, void *data, struct vfsmount *mnt)
|
|
{
|
|
zpl_mount_data_t zmd = { osname, data, mnt };
|
|
|
|
return get_sb_nodev(fs_type, flags, &zmd, zpl_fill_super, mnt);
|
|
}
|
|
|
|
static void
|
|
zpl_kill_sb(struct super_block *sb)
|
|
{
|
|
#ifdef HAVE_SNAPSHOT
|
|
zfs_sb_t *zsb = sb->s_fs_info;
|
|
|
|
if (zsb && dmu_objset_is_snapshot(zsb->z_os))
|
|
zfs_snap_destroy(zsb);
|
|
#endif /* HAVE_SNAPSHOT */
|
|
|
|
kill_anon_super(sb);
|
|
}
|
|
|
|
const struct super_operations zpl_super_operations = {
|
|
.alloc_inode = zpl_inode_alloc,
|
|
.destroy_inode = zpl_inode_destroy,
|
|
.delete_inode = zpl_inode_delete,
|
|
.dirty_inode = NULL,
|
|
.write_inode = NULL,
|
|
.drop_inode = NULL,
|
|
.clear_inode = zpl_evict_inode,
|
|
.put_super = zpl_put_super,
|
|
.write_super = NULL,
|
|
.sync_fs = NULL,
|
|
.freeze_fs = NULL,
|
|
.unfreeze_fs = NULL,
|
|
.statfs = zpl_statfs,
|
|
.remount_fs = NULL,
|
|
.show_options = zpl_show_options,
|
|
.show_stats = NULL,
|
|
};
|
|
|
|
#if 0
|
|
const struct export_operations zpl_export_operations = {
|
|
.fh_to_dentry = NULL,
|
|
.fh_to_parent = NULL,
|
|
.get_parent = NULL,
|
|
};
|
|
#endif
|
|
|
|
struct file_system_type zpl_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = ZFS_DRIVER,
|
|
.get_sb = zpl_get_sb,
|
|
.kill_sb = zpl_kill_sb,
|
|
};
|