2 *------------------------------------------------------------------
3 * Copyright (c) 2009 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
18 #ifndef __included_svm_common_h__
19 #define __included_svm_common_h__
24 #include <vppinfra/clib.h>
25 #include <vppinfra/types.h>
27 #define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */
29 #define SVM_FLAGS_MHEAP (1<<0) /* region contains an mheap */
30 #define SVM_FLAGS_FILE (1<<1) /* region backed by one or more files */
31 #define SVM_FLAGS_NODATA (1<<2) /* region will be further subdivided */
32 #define SVM_FLAGS_NEED_DATA_INIT (1<<3)
34 #define SVM_PVT_MHEAP_SIZE (128<<10) /* region's private mheap (128k) */
36 typedef struct svm_region_
38 volatile uword version;
39 pthread_mutex_t mutex;
40 pthread_cond_t condvar;
41 int mutex_owner_pid; /* in case of trouble */
44 uword virtual_base; /* base of the region object */
47 void *data_base; /* data portion base address */
48 void *data_heap; /* data heap, if any */
49 volatile void *user_ctx; /* user context pointer */
50 /* stuff allocated in the region's heap */
51 uword bitmap_size; /* nbits in virtual alloc bitmap */
52 uword *bitmap; /* the bitmap */
60 * (64K) clib heap for the region itself
62 * data_base -> whatever is in this region
67 typedef struct svm_map_region_args_
69 const char *root_path; /* NULL means use the truly global arena */
76 uword backing_mmap_size;
77 /* uid, gid to own the svm region(s) */
80 } svm_map_region_args_t;
83 * Memory mapped to high addresses for session/vppcom/vcl/etc...
86 #ifdef CLIB_SANITIZE_ADDR
87 #define HIGH_SEGMENT_BASEVA 0x300000000000 /* DO NOT CHANGE THIS: YOU'LL BREAK ASAN */
88 #else /* CLIB_SANITIZE_ADDR */
89 #define HIGH_SEGMENT_BASEVA (128ULL << 30) /* 128GB */
90 #endif /* CLIB_SANITIZE_ADDR */
91 #elif __WORDSIZE == 32
92 #define HIGH_SEGMENT_BASEVA (3584UL << 20) /* 3.5GB */
94 #error "unknown __WORDSIZE"
98 * Memory shared across all router instances. Packet buffers, etc
99 * Base should be "out of the way," and size should be big enough to
100 * cover everything we plan to put here.
102 #define SVM_GLOBAL_REGION_SIZE (64<<20)
103 #define SVM_GLOBAL_REGION_NAME "/global_vm"
104 u64 svm_get_global_region_base_va ();
107 * Memory shared across individual router instances.
109 #define SVM_OVERLAY_REGION_BASEVA \
110 (SVM_GLOBAL_REGION_BASEVA + SVM_GLOBAL_REGION_SIZE)
111 #define SVM_OVERLAY_REGION_SIZE (1<<20)
112 #define SVM_OVERLAY_REGION_BASENAME "/overlay_vm"
121 svm_subregion_t *subregions; /* subregion pool */
129 void *svm_region_find_or_create (svm_map_region_args_t * a);
130 void svm_region_init (void);
131 void svm_region_init_mapped_region (svm_map_region_args_t * a,
133 int svm_region_init_chroot (const char *root_path);
134 void svm_region_init_chroot_uid_gid (const char *root_path, int uid, int gid);
135 void svm_region_init_args (svm_map_region_args_t * a);
136 void svm_region_exit (void);
137 void svm_region_exit_client (void);
138 void svm_region_unmap (void *rp_arg);
139 void svm_region_unmap_client (void *rp_arg);
140 void svm_client_scan (const char *root_path);
141 void svm_client_scan_this_region_nolock (svm_region_t * rp);
142 u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t * a);
143 u8 *format_svm_region (u8 * s, va_list * args);
145 svm_region_t *svm_get_root_rp (void);
147 #endif /* __included_svm_common_h__ */
150 * fd.io coding-style-patch-verification: ON
153 * eval: (c-set-style "gnu")