Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_SUPPORT_KMEM_H__ | |
19 | #define __XFS_SUPPORT_KMEM_H__ | |
20 | ||
21 | #include <linux/slab.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/mm.h> | |
bdfb0430 | 24 | #include <linux/vmalloc.h> |
1da177e4 | 25 | |
8758280f NS |
26 | /* |
27 | * General memory allocation interfaces | |
28 | */ | |
29 | ||
77ba7877 AV |
30 | typedef unsigned __bitwise xfs_km_flags_t; |
31 | #define KM_SLEEP ((__force xfs_km_flags_t)0x0001u) | |
32 | #define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u) | |
33 | #define KM_NOFS ((__force xfs_km_flags_t)0x0004u) | |
34 | #define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u) | |
8758280f NS |
35 | |
36 | /* | |
37 | * We use a special process flag to avoid recursive callbacks into | |
38 | * the filesystem during transactions. We will also issue our own | |
39 | * warnings, so we explicitly skip any generic ones (silly of us). | |
40 | */ | |
41 | static inline gfp_t | |
77ba7877 | 42 | kmem_flags_convert(xfs_km_flags_t flags) |
1da177e4 | 43 | { |
8758280f | 44 | gfp_t lflags; |
1da177e4 | 45 | |
bdfb0430 | 46 | BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL)); |
1da177e4 LT |
47 | |
48 | if (flags & KM_NOSLEEP) { | |
8758280f | 49 | lflags = GFP_ATOMIC | __GFP_NOWARN; |
1da177e4 | 50 | } else { |
8758280f | 51 | lflags = GFP_KERNEL | __GFP_NOWARN; |
59c1b082 | 52 | if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS)) |
1da177e4 LT |
53 | lflags &= ~__GFP_FS; |
54 | } | |
8758280f | 55 | return lflags; |
1da177e4 LT |
56 | } |
57 | ||
77ba7877 AV |
58 | extern void *kmem_alloc(size_t, xfs_km_flags_t); |
59 | extern void *kmem_zalloc(size_t, xfs_km_flags_t); | |
fdd3ccee | 60 | extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t); |
77ba7877 | 61 | extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t); |
d3689d76 | 62 | extern void kmem_free(const void *); |
8758280f | 63 | |
bdfb0430 CH |
64 | |
65 | extern void *kmem_zalloc_greedy(size_t *, size_t, size_t); | |
66 | ||
8758280f NS |
67 | /* |
68 | * Zone interfaces | |
69 | */ | |
70 | ||
71 | #define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN | |
72 | #define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT | |
b0196009 | 73 | #define KM_ZONE_SPREAD SLAB_MEM_SPREAD |
8758280f NS |
74 | |
75 | #define kmem_zone kmem_cache | |
76 | #define kmem_zone_t struct kmem_cache | |
77 | ||
78 | static inline kmem_zone_t * | |
1da177e4 LT |
79 | kmem_zone_init(int size, char *zone_name) |
80 | { | |
20c2df83 | 81 | return kmem_cache_create(zone_name, size, 0, 0, NULL); |
1da177e4 LT |
82 | } |
83 | ||
8758280f NS |
84 | static inline kmem_zone_t * |
85 | kmem_zone_init_flags(int size, char *zone_name, unsigned long flags, | |
51cc5068 | 86 | void (*construct)(void *)) |
8758280f | 87 | { |
20c2df83 | 88 | return kmem_cache_create(zone_name, size, 0, flags, construct); |
8758280f NS |
89 | } |
90 | ||
91 | static inline void | |
1da177e4 LT |
92 | kmem_zone_free(kmem_zone_t *zone, void *ptr) |
93 | { | |
94 | kmem_cache_free(zone, ptr); | |
95 | } | |
96 | ||
8758280f | 97 | static inline void |
1da177e4 LT |
98 | kmem_zone_destroy(kmem_zone_t *zone) |
99 | { | |
1a1d92c1 AD |
100 | if (zone) |
101 | kmem_cache_destroy(zone); | |
1da177e4 LT |
102 | } |
103 | ||
77ba7877 AV |
104 | extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t); |
105 | extern void *kmem_zone_zalloc(kmem_zone_t *, xfs_km_flags_t); | |
1da177e4 | 106 | |
1da177e4 | 107 | #endif /* __XFS_SUPPORT_KMEM_H__ */ |