1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2018 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #ifndef _LINUXKPI_LINUX_SHMEM_FS_H_
30 #define _LINUXKPI_LINUX_SHMEM_FS_H_
31
32 #include <linux/file.h>
33 #include <linux/mempolicy.h>
34 #include <linux/pagemap.h>
35 #include <linux/swap.h>
36
37 /* Shared memory support */
38 struct page *linux_shmem_read_mapping_page_gfp(vm_object_t obj, int pindex,
39 gfp_t gfp);
40 struct linux_file *linux_shmem_file_setup(const char *name, loff_t size,
41 unsigned long flags);
42 void linux_shmem_truncate_range(vm_object_t obj, loff_t lstart,
43 loff_t lend);
44
45 #define shmem_read_mapping_page(...) \
46 linux_shmem_read_mapping_page_gfp(__VA_ARGS__, 0)
47
48 #define shmem_read_mapping_page_gfp(...) \
49 linux_shmem_read_mapping_page_gfp(__VA_ARGS__)
50
51 #define shmem_file_setup(...) \
52 linux_shmem_file_setup(__VA_ARGS__)
53
54 #define shmem_truncate_range(...) \
55 linux_shmem_truncate_range(__VA_ARGS__)
56
57 static inline struct folio *
shmem_read_folio_gfp(vm_object_t obj,int pindex,gfp_t gfp)58 shmem_read_folio_gfp(vm_object_t obj, int pindex, gfp_t gfp)
59 {
60 struct page *page;
61
62 page = shmem_read_mapping_page_gfp(obj, pindex, gfp);
63
64 return (page_folio(page));
65 }
66
67 #endif /* _LINUXKPI_LINUX_SHMEM_FS_H_ */
68