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Vector Packet Processing
svm_common.h
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1 /*
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:
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
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  *------------------------------------------------------------------
16  */
17 
18 #ifndef __included_svm_common_h__
19 #define __included_svm_common_h__
20 
21 #include <stdarg.h>
22 #include <pthread.h>
23 #include <sys/user.h>
24 #include <vppinfra/types.h>
25 
26 #define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */
27 
28 #define SVM_FLAGS_MHEAP (1<<0) /* region contains an mheap */
29 #define SVM_FLAGS_FILE (1<<1) /* region backed by one or more files */
30 #define SVM_FLAGS_NODATA (1<<2) /* region will be further subdivided */
31 #define SVM_FLAGS_NEED_DATA_INIT (1<<3)
32 
33 #define SVM_PVT_MHEAP_SIZE (128<<10) /* region's private mheap (128k) */
34 
35 typedef struct svm_region_
36 {
37  volatile uword version;
38  pthread_mutex_t mutex;
39  pthread_cond_t condvar;
40  int mutex_owner_pid; /* in case of trouble */
43  uword virtual_base; /* base of the region object */
45  void *region_heap;
46  void *data_base; /* data portion base address */
47  void *data_heap; /* data heap, if any */
48  volatile void *user_ctx; /* user context pointer */
49  /* stuff allocated in the region's heap */
50  uword bitmap_size; /* nbits in virtual alloc bitmap */
51  uword *bitmap; /* the bitmap */
52  char *region_name;
53  char *backing_file;
54  char **filenames;
56  /* pad */
57 
58  /* next page:
59  * (64K) clib heap for the region itself
60  *
61  * data_base -> whatever is in this region
62  */
63 
64 } svm_region_t;
65 
66 typedef struct svm_map_region_args_
67 {
68  const char *root_path; /* NULL means use the truly global arena */
69  const char *name;
74  char *backing_file;
76  /* uid, gid to own the svm region(s) */
77  int uid;
78  int gid;
80 
81 /*
82  * Memory mapped to high addresses for session/vppcom/vcl/etc...
83  */
84 #if __WORDSIZE == 64
85 #ifdef CLIB_SANITIZE_ADDR
86 #define HIGH_SEGMENT_BASEVA 0x300000000000 /* DO NOT CHANGE THIS: YOU'LL BREAK ASAN */
87 #else /* CLIB_SANITIZE_ADDR */
88 #define HIGH_SEGMENT_BASEVA (128ULL << 30) /* 128GB */
89 #endif /* CLIB_SANITIZE_ADDR */
90 #elif __WORDSIZE == 32
91 #define HIGH_SEGMENT_BASEVA (3584UL << 20) /* 3.5GB */
92 #else
93 #error "unknown __WORDSIZE"
94 #endif
95 
96 /*
97  * Memory shared across all router instances. Packet buffers, etc
98  * Base should be "out of the way," and size should be big enough to
99  * cover everything we plan to put here.
100  */
101 #define SVM_GLOBAL_REGION_SIZE (64<<20)
102 #define SVM_GLOBAL_REGION_NAME "/global_vm"
104 
105 /*
106  * Memory shared across individual router instances.
107  */
108 #define SVM_OVERLAY_REGION_BASEVA \
109  (SVM_GLOBAL_REGION_BASEVA + SVM_GLOBAL_REGION_SIZE)
110 #define SVM_OVERLAY_REGION_SIZE (1<<20)
111 #define SVM_OVERLAY_REGION_BASENAME "/overlay_vm"
112 
113 typedef struct
114 {
117 
118 typedef struct
119 {
120  svm_subregion_t *subregions; /* subregion pool */
123  int uid;
124  int gid;
126 
127 
129 void svm_region_init (void);
131  svm_region_t * rp);
132 int svm_region_init_chroot (const char *root_path);
133 void svm_region_init_chroot_uid_gid (const char *root_path, int uid, int gid);
135 void svm_region_exit (void);
136 void svm_region_exit_client (void);
137 void svm_region_unmap (void *rp_arg);
138 void svm_region_unmap_client (void *rp_arg);
139 void svm_client_scan (const char *root_path);
142 u8 *format_svm_region (u8 * s, va_list * args);
143 
145 
146 #endif /* __included_svm_common_h__ */
147 
148 /*
149  * fd.io coding-style-patch-verification: ON
150  *
151  * Local Variables:
152  * eval: (c-set-style "gnu")
153  * End:
154  */
svm_region_::data_heap
void * data_heap
Definition: svm_common.h:47
svm_client_scan
void svm_client_scan(const char *root_path)
Definition: svm.c:1251
svm_region_init_chroot
int svm_region_init_chroot(const char *root_path)
Definition: svm.c:841
format_svm_region
u8 * format_svm_region(u8 *s, va_list *args)
Definition: svm.c:182
svm_main_region_t::uid
int uid
Definition: svm_common.h:123
types.h
svm_region_::region_name
char * region_name
Definition: svm_common.h:52
svm_map_region_args_::name
const char * name
Definition: svm_common.h:69
svm_client_scan_this_region_nolock
void svm_client_scan_this_region_nolock(svm_region_t *rp)
Definition: svm.c:1223
svm_map_region_args_::backing_file
char * backing_file
Definition: svm_common.h:74
svm_region_unmap
void svm_region_unmap(void *rp_arg)
Definition: svm.c:1144
svm_map_region_args_::baseva
uword baseva
Definition: svm_common.h:70
svm_region_::client_pids
uword * client_pids
Definition: svm_common.h:55
svm_subregion_t
Definition: svm_common.h:113
svm_region_::filenames
char ** filenames
Definition: svm_common.h:54
svm_map_region_args_t
struct svm_map_region_args_ svm_map_region_args_t
svm_region_::mutex
pthread_mutex_t mutex
Definition: svm_common.h:38
svm_region_::data_base
void * data_base
Definition: svm_common.h:46
svm_region_init
void svm_region_init(void)
Definition: svm.c:824
svm_region_init_args
void svm_region_init_args(svm_map_region_args_t *a)
Definition: svm.c:875
svm_main_region_t::gid
int gid
Definition: svm_common.h:124
svm_region_::mutex_owner_pid
int mutex_owner_pid
Definition: svm_common.h:40
svm_region_exit
void svm_region_exit(void)
Definition: svm.c:1211
svm_region_::bitmap_size
uword bitmap_size
Definition: svm_common.h:50
uword
u64 uword
Definition: types.h:112
svm_main_region_t::subregions
svm_subregion_t * subregions
Definition: svm_common.h:120
svm_main_region_t
Definition: svm_common.h:118
svm_get_global_region_base_va
u64 svm_get_global_region_base_va()
Definition: svm.c:61
svm_region_init_chroot_uid_gid
void svm_region_init_chroot_uid_gid(const char *root_path, int uid, int gid)
Definition: svm.c:858
svm_region_::virtual_size
uword virtual_size
Definition: svm_common.h:44
svm_subregion_t::subregion_name
u8 * subregion_name
Definition: svm_common.h:115
u64
unsigned long u64
Definition: types.h:89
svm_region_find_or_create
void * svm_region_find_or_create(svm_map_region_args_t *a)
Definition: svm.c:881
svm_region_::user_ctx
volatile void * user_ctx
Definition: svm_common.h:48
svm_map_region_args_::pvt_heap_size
u64 pvt_heap_size
Definition: svm_common.h:72
svm_main_region_t::name_hash
uword * name_hash
Definition: svm_common.h:121
svm_region_::flags
uword flags
Definition: svm_common.h:42
svm_region_::virtual_base
uword virtual_base
Definition: svm_common.h:43
svm_map_region_args_::size
u64 size
Definition: svm_common.h:71
svm_region_::region_heap
void * region_heap
Definition: svm_common.h:45
svm_map_region_args_::backing_mmap_size
uword backing_mmap_size
Definition: svm_common.h:75
svm_map_region_args_::uid
int uid
Definition: svm_common.h:77
svm_region_
Definition: svm_common.h:35
u8
unsigned char u8
Definition: types.h:56
a
a
Definition: bitmap.h:525
svm_region_exit_client
void svm_region_exit_client(void)
Definition: svm.c:1217
svm_region_init_mapped_region
void svm_region_init_mapped_region(svm_map_region_args_t *a, svm_region_t *rp)
Definition: svm.c:445
shm_name_from_svm_map_region_args
u8 * shm_name_from_svm_map_region_args(svm_map_region_args_t *a)
Definition: svm.c:421
svm_region_unmap_client
void svm_region_unmap_client(void *rp_arg)
Definition: svm.c:1150
svm_region_::condvar
pthread_cond_t condvar
Definition: svm_common.h:39
svm_map_region_args_::root_path
const char * root_path
Definition: svm_common.h:68
svm_region_t
struct svm_region_ svm_region_t
svm_get_root_rp
svm_region_t * svm_get_root_rp(void)
Definition: svm.c:53
svm_region_::bitmap
uword * bitmap
Definition: svm_common.h:51
svm_main_region_t::root_path
u8 * root_path
Definition: svm_common.h:122
svm_region_::backing_file
char * backing_file
Definition: svm_common.h:53
svm_region_::version
volatile uword version
Definition: svm_common.h:37
svm_map_region_args_::gid
int gid
Definition: svm_common.h:78
svm_map_region_args_::flags
uword flags
Definition: svm_common.h:73
svm_region_::mutex_owner_tag
int mutex_owner_tag
Definition: svm_common.h:41
svm_map_region_args_
Definition: svm_common.h:66