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7268e1be BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Copyright (C) 2011 Lawrence Livermore National Security, LLC. | |
24 | */ | |
25 | ||
26 | #ifndef _ZFS_VFS_H | |
27 | #define _ZFS_VFS_H | |
28 | ||
bdf4328b BB |
29 | /* |
30 | * 2.6.28 API change, | |
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. | |
34 | */ | |
35 | #ifndef HAVE_INSERT_INODE_LOCKED | |
36 | static inline int | |
37 | insert_inode_locked(struct inode *ip) | |
38 | { | |
39 | insert_inode_hash(ip); | |
40 | return (0); | |
41 | } | |
42 | #endif /* HAVE_INSERT_INODE_LOCKED */ | |
7268e1be | 43 | |
b3129792 PJ |
44 | /* |
45 | * 2.6.35 API change, | |
46 | * Add truncate_setsize() if it is not exported by the Linux kernel. | |
47 | * | |
48 | * Truncate the inode and pages associated with the inode. The pages are | |
49 | * unmapped and removed from cache. | |
50 | */ | |
51 | #ifndef HAVE_TRUNCATE_SETSIZE | |
52 | static inline void | |
53 | truncate_setsize(struct inode *ip, loff_t new) | |
54 | { | |
55 | struct address_space *mapping = ip->i_mapping; | |
56 | ||
57 | i_size_write(ip, new); | |
58 | ||
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); | |
62 | } | |
63 | #endif /* HAVE_TRUNCATE_SETSIZE */ | |
64 | ||
76659dc1 BB |
65 | /* |
66 | * 2.6.32 API change, | |
67 | * Added backing_device_info (bdi) per super block interfaces. When | |
68 | * available a bdi must be configured when using a non-device backed | |
69 | * filesystem for proper writeback. It's safe to leave this code | |
70 | * dormant for kernels which only support pdflush and not bdi. | |
71 | */ | |
72 | #ifdef HAVE_BDI | |
73 | #define bdi_get_sb(sb) (sb->s_bdi) | |
74 | #define bdi_put_sb(sb, bdi) (sb->s_bdi = bdi) | |
75 | #else | |
76 | #define bdi_init(bdi) (0) | |
77 | #define bdi_destroy(bdi) (0) | |
78 | #define bdi_register(bdi, parent, fmt, args) (0) | |
79 | #define bdi_unregister(bdi) (0) | |
80 | #define bdi_get_sb(sb) (0) | |
81 | #define bdi_put_sb(sb, bdi) (0) | |
82 | #endif /* HAVE_BDI */ | |
83 | ||
7268e1be | 84 | #endif /* _ZFS_VFS_H */ |