4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
26 #include <sys/zfs_vfsops.h>
27 #include <sys/zfs_vnops.h>
28 #include <sys/zfs_znode.h>
33 zpl_inode_alloc(struct super_block
*sb
)
37 VERIFY3S(zfs_inode_alloc(sb
, &ip
), ==, 0);
44 zpl_inode_destroy(struct inode
*ip
)
46 ASSERT(atomic_read(&ip
->i_count
) == 0);
47 zfs_inode_destroy(ip
);
51 * When ->drop_inode() is called its return value indicates if the
52 * inode should be evicted from the inode cache. If the inode is
53 * unhashed and has no links the default policy is to evict it
56 * Prior to 2.6.36 this eviction was accomplished by the vfs calling
57 * ->delete_inode(). It was ->delete_inode()'s responsibility to
58 * truncate the inode pages and call clear_inode(). The call to
59 * clear_inode() synchronously invalidates all the buffers and
60 * calls ->clear_inode(). It was ->clear_inode()'s responsibility
61 * to cleanup and filesystem specific data before freeing the inode.
63 * This elaborate mechanism was replaced by ->evict_inode() which
64 * does the job of both ->delete_inode() and ->clear_inode(). It
65 * will be called exactly once, and when it returns the inode must
66 * be in a state where it can simply be freed. The ->evict_inode()
67 * callback must minimally truncate the inode pages, and call
68 * end_writeback() to complete all outstanding writeback for the
69 * inode. After this is complete evict inode can cleanup any
70 * remaining filesystem specific data.
72 #ifdef HAVE_EVICT_INODE
74 zpl_evict_inode(struct inode
*ip
)
76 truncate_inode_pages(&ip
->i_data
, 0);
84 zpl_clear_inode(struct inode
*ip
)
90 zpl_inode_delete(struct inode
*ip
)
92 truncate_inode_pages(&ip
->i_data
, 0);
96 #endif /* HAVE_EVICT_INODE */
99 zpl_put_super(struct super_block
*sb
)
103 error
= -zfs_umount(sb
);
104 ASSERT3S(error
, <=, 0);
108 zpl_sync_fs(struct super_block
*sb
, int wait
)
114 error
= -zfs_sync(sb
, wait
, cr
);
116 ASSERT3S(error
, <=, 0);
122 zpl_statfs(struct dentry
*dentry
, struct kstatfs
*statp
)
126 error
= -zfs_statvfs(dentry
, statp
);
127 ASSERT3S(error
, <=, 0);
133 zpl_remount_fs(struct super_block
*sb
, int *flags
, char *data
)
136 error
= -zfs_remount(sb
, flags
, data
);
137 ASSERT3S(error
, <=, 0);
143 zpl_show_options(struct seq_file
*seq
, struct vfsmount
*vfsp
)
145 struct super_block
*sb
= vfsp
->mnt_sb
;
146 zfs_sb_t
*zsb
= sb
->s_fs_info
;
149 * The Linux VFS automatically handles the following flags:
150 * MNT_NOSUID, MNT_NODEV, MNT_NOEXEC, MNT_NOATIME, MNT_READONLY
153 if (zsb
->z_flags
& ZSB_XATTR_USER
)
154 seq_printf(seq
, ",%s", "xattr");
160 zpl_fill_super(struct super_block
*sb
, void *data
, int silent
)
164 error
= -zfs_domount(sb
, data
, silent
);
165 ASSERT3S(error
, <=, 0);
171 zpl_get_sb(struct file_system_type
*fs_type
, int flags
,
172 const char *osname
, void *data
, struct vfsmount
*mnt
)
174 zpl_mount_data_t zmd
= { osname
, data
, mnt
};
176 return get_sb_nodev(fs_type
, flags
, &zmd
, zpl_fill_super
, mnt
);
180 zpl_kill_sb(struct super_block
*sb
)
183 zfs_sb_t
*zsb
= sb
->s_fs_info
;
185 if (zsb
&& dmu_objset_is_snapshot(zsb
->z_os
))
186 zfs_snap_destroy(zsb
);
187 #endif /* HAVE_SNAPSHOT */
192 const struct super_operations zpl_super_operations
= {
193 .alloc_inode
= zpl_inode_alloc
,
194 .destroy_inode
= zpl_inode_destroy
,
198 #ifdef HAVE_EVICT_INODE
199 .evict_inode
= zpl_evict_inode
,
201 .clear_inode
= zpl_clear_inode
,
202 .delete_inode
= zpl_inode_delete
,
203 #endif /* HAVE_EVICT_INODE */
204 .put_super
= zpl_put_super
,
206 .sync_fs
= zpl_sync_fs
,
207 .statfs
= zpl_statfs
,
208 .remount_fs
= zpl_remount_fs
,
209 .show_options
= zpl_show_options
,
213 struct file_system_type zpl_fs_type
= {
214 .owner
= THIS_MODULE
,
216 .get_sb
= zpl_get_sb
,
217 .kill_sb
= zpl_kill_sb
,