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]
23 * Copyright (C) 2011 Lawrence Livermore National Security, LLC.
31 * Added insert_inode_locked() helper function, prior to this most callers
32 * used insert_inode_hash(). The older method doesn't check for collisions
33 * in the inode_hashtable but it still acceptible for use.
35 #ifndef HAVE_INSERT_INODE_LOCKED
37 insert_inode_locked(struct inode
*ip
)
39 insert_inode_hash(ip
);
42 #endif /* HAVE_INSERT_INODE_LOCKED */
46 * Add truncate_setsize() if it is not exported by the Linux kernel.
48 * Truncate the inode and pages associated with the inode. The pages are
49 * unmapped and removed from cache.
51 #ifndef HAVE_TRUNCATE_SETSIZE
53 truncate_setsize(struct inode
*ip
, loff_t
new)
55 struct address_space
*mapping
= ip
->i_mapping
;
57 i_size_write(ip
, new);
59 unmap_mapping_range(mapping
, new + PAGE_SIZE
- 1, 0, 1);
60 truncate_inode_pages(mapping
, new);
61 unmap_mapping_range(mapping
, new + PAGE_SIZE
- 1, 0, 1);
63 #endif /* HAVE_TRUNCATE_SETSIZE */
65 #if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
68 * Add bdi_setup_and_register() function if not yet provided by kernel.
69 * It is used to quickly initialize and register a BDI for the filesystem.
71 extern atomic_long_t zfs_bdi_seq
;
74 bdi_setup_and_register(struct backing_dev_info
*bdi
,char *name
,unsigned int cap
)
80 bdi
->capabilities
= cap
;
81 error
= bdi_init(bdi
);
85 sprintf(tmp
, "%.28s%s", name
, "-%d");
86 error
= bdi_register(bdi
, NULL
, tmp
,
87 atomic_long_inc_return(&zfs_bdi_seq
));
95 #endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
99 * Add set_nlink() if it is not exported by the Linux kernel.
101 * i_nlink is read-only in Linux 3.2, but it can be set directly in
104 #ifndef HAVE_SET_NLINK
106 set_nlink(struct inode
*inode
, unsigned int nlink
)
108 inode
->i_nlink
= nlink
;
110 #endif /* HAVE_SET_NLINK */
114 * The VFS .create, .mkdir and .mknod callbacks were updated to take a
115 * umode_t type rather than an int. To cleanly handle both definitions
116 * the zpl_umode_t type is introduced and set accordingly.
118 #ifdef HAVE_CREATE_UMODE_T
119 typedef umode_t zpl_umode_t
;
121 typedef int zpl_umode_t
;
124 #endif /* _ZFS_VFS_H */