projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| fe9d3fa6 SF |
1 | /* |
| 2 | * Copyright (C) 2005-2017 Junjiro R. Okajima | |
| 3 | * | |
| 4 | * This program, aufs is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation; either version 2 of the License, or | |
| 7 | * (at your option) any later version. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will 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. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | ||
| 18 | /* | |
| 19 | * module initialization and module-global | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef __AUFS_MODULE_H__ | |
| 23 | #define __AUFS_MODULE_H__ | |
| 24 | ||
| 25 | #ifdef __KERNEL__ | |
| 26 | ||
| 27 | #include <linux/slab.h> | |
| 28 | ||
| 29 | struct path; | |
| 30 | struct seq_file; | |
| 31 | ||
| 32 | /* module parameters */ | |
| 33 | extern int sysaufs_brs; | |
| 34 | extern bool au_userns; | |
| 35 | ||
| 36 | /* ---------------------------------------------------------------------- */ | |
| 37 | ||
| 38 | extern int au_dir_roflags; | |
| 39 | ||
| 40 | void *au_krealloc(void *p, unsigned int new_sz, gfp_t gfp, int may_shrink); | |
| 41 | void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp, | |
| 42 | int may_shrink); | |
| 43 | ||
| 44 | static inline int au_kmidx_sub(size_t sz, size_t new_sz) | |
| 45 | { | |
| 46 | #ifndef CONFIG_SLOB | |
| 47 | return kmalloc_index(sz) - kmalloc_index(new_sz); | |
| 48 | #else | |
| 49 | return -1; /* SLOB is untested */ | |
| 50 | #endif | |
| 51 | } | |
| 52 | ||
| 53 | int au_seq_path(struct seq_file *seq, struct path *path); | |
| 54 | ||
| 55 | #ifdef CONFIG_PROC_FS | |
| 56 | /* procfs.c */ | |
| 57 | int __init au_procfs_init(void); | |
| 58 | void au_procfs_fin(void); | |
| 59 | #else | |
| 60 | AuStubInt0(au_procfs_init, void); | |
| 61 | AuStubVoid(au_procfs_fin, void); | |
| 62 | #endif | |
| 63 | ||
| 64 | /* ---------------------------------------------------------------------- */ | |
| 65 | ||
| 66 | /* kmem cache */ | |
| 67 | enum { | |
| 68 | AuCache_DINFO, | |
| 69 | AuCache_ICNTNR, | |
| 70 | AuCache_FINFO, | |
| 71 | AuCache_VDIR, | |
| 72 | AuCache_DEHSTR, | |
| 73 | AuCache_HNOTIFY, /* must be last */ | |
| 74 | AuCache_Last | |
| 75 | }; | |
| 76 | ||
| 77 | extern struct kmem_cache *au_cache[AuCache_Last]; | |
| 78 | ||
| 79 | #define AuCacheFlags (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD) | |
| 80 | #define AuCache(type) KMEM_CACHE(type, AuCacheFlags) | |
| 81 | #define AuCacheCtor(type, ctor) \ | |
| 82 | kmem_cache_create(#type, sizeof(struct type), \ | |
| 83 | __alignof__(struct type), AuCacheFlags, ctor) | |
| 84 | ||
| 85 | #define AuCacheFuncs(name, index) \ | |
| 86 | static inline struct au_##name *au_cache_alloc_##name(void) \ | |
| 87 | { return kmem_cache_alloc(au_cache[AuCache_##index], GFP_NOFS); } \ | |
| 88 | static inline void au_cache_free_##name(struct au_##name *p) \ | |
| 89 | { kmem_cache_free(au_cache[AuCache_##index], p); } | |
| 90 | ||
| 91 | AuCacheFuncs(dinfo, DINFO); | |
| 92 | AuCacheFuncs(icntnr, ICNTNR); | |
| 93 | AuCacheFuncs(finfo, FINFO); | |
| 94 | AuCacheFuncs(vdir, VDIR); | |
| 95 | AuCacheFuncs(vdir_dehstr, DEHSTR); | |
| 96 | #ifdef CONFIG_AUFS_HNOTIFY | |
| 97 | AuCacheFuncs(hnotify, HNOTIFY); | |
| 98 | #endif | |
| 99 | ||
| 100 | #endif /* __KERNEL__ */ | |
| 101 | #endif /* __AUFS_MODULE_H__ */ |