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Diffstat (limited to 'svm/svm.h')
| -rw-r--r-- | svm/svm.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/svm/svm.h b/svm/svm.h new file mode 100644 index 00000000000..95c55001817 --- /dev/null +++ b/svm/svm.h @@ -0,0 +1,184 @@ +/* + *------------------------------------------------------------------ + * svm.h - shared VM allocation, mmap(...MAP_FIXED...) + * brain police + * + * Copyright (c) 2009 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#ifndef __included_svm_h__ +#define __included_svm_h__ + +#include <pthread.h> +#include <vppinfra/clib.h> +#include <vppinfra/mem.h> + +#define MMAP_PAGESIZE (4<<10) + +#define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */ + +#define SVM_FLAGS_MHEAP (1<<0) /* region contains an mheap */ +#define SVM_FLAGS_FILE (1<<1) /* region backed by one or more files */ +#define SVM_FLAGS_NODATA (1<<2) /* region will be further subdivided */ +#define SVM_FLAGS_NEED_DATA_INIT (1<<3) + +#define SVM_PVT_MHEAP_SIZE (32<<10) /* region's private mheap (32k) */ + +typedef struct svm_region_ { + volatile uword version; + pthread_mutex_t mutex; + pthread_cond_t condvar; + int mutex_owner_pid; /* in case of trouble */ + int mutex_owner_tag; + uword flags; + uword virtual_base; /* base of the region object */ + uword virtual_size; + void *region_heap; + void *data_base; /* data portion base address */ + void *data_heap; /* data heap, if any */ + volatile void *user_ctx; /* user context pointer */ + /* stuff allocated in the region's heap */ + uword bitmap_size; /* nbits in virtual alloc bitmap */ + uword *bitmap; /* the bitmap */ + char *region_name; + char *backing_file; + char **filenames; + uword *client_pids; + /* pad */ + + /* next page: + * (64K) clib heap for the region itself + * + * data_base -> whatever is in this region + */ + +} svm_region_t; + +typedef struct svm_map_region_args_ { + char *root_path; /* NULL means use the truly global arena */ + char *name; + uword baseva; + uword size; + uword flags; + char *backing_file; + uword backing_mmap_size; +} svm_map_region_args_t; + + +/* + * Memory shared across all router instances. Packet buffers, etc + * Base should be "out of the way," and size should be big enough to + * cover everything we plan to put here. + */ +#define SVM_GLOBAL_REGION_BASEVA 0x30000000 +#define SVM_GLOBAL_REGION_SIZE (64<<20) +#define SVM_GLOBAL_REGION_NAME "/global_vm" + +/* + * Memory shared across individual router instances. + */ +#define SVM_OVERLAY_REGION_BASEVA \ + (SVM_GLOBAL_REGION_BASEVA + SVM_GLOBAL_REGION_SIZE) +#define SVM_OVERLAY_REGION_SIZE (1<<20) +#define SVM_OVERLAY_REGION_BASENAME "/overlay_vm" + +typedef struct { + u8 *subregion_name; +} svm_subregion_t; + +typedef struct { + svm_subregion_t *subregions; /* subregion pool */ + uword *name_hash; + u8 *root_path; +} svm_main_region_t; + + +void *svm_region_find_or_create (svm_map_region_args_t *a); +void svm_region_init(void); +void svm_region_init_chroot(char *root_path); +void svm_region_exit (void); +void svm_region_unmap(void *rp_arg); +void svm_client_scan (char *root_path); +void svm_client_scan_this_region_nolock (svm_region_t *rp); +u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a); + +static inline void *svm_mem_alloc (svm_region_t *rp, uword size) +{ + u8 *oldheap; + ASSERT(rp->flags & SVM_FLAGS_MHEAP); + u8 *rv; + + pthread_mutex_lock(&rp->mutex); + oldheap = clib_mem_set_heap(rp->data_heap); + rv = clib_mem_alloc (size); + clib_mem_set_heap(oldheap); + pthread_mutex_unlock(&rp->mutex); + return (rv); +} + +static inline void *svm_mem_alloc_aligned_at_offset (svm_region_t *rp, + uword size, + uword align, + uword offset) +{ + u8 *oldheap; + ASSERT(rp->flags & SVM_FLAGS_MHEAP); + u8 *rv; + + pthread_mutex_lock(&rp->mutex); + oldheap = clib_mem_set_heap(rp->data_heap); + rv = clib_mem_alloc_aligned_at_offset (size, align, offset); + clib_mem_set_heap(oldheap); + pthread_mutex_unlock(&rp->mutex); + return (rv); +} + +static inline void svm_mem_free (svm_region_t *rp, void *ptr) +{ + u8 *oldheap; + ASSERT(rp->flags & SVM_FLAGS_MHEAP); + + pthread_mutex_lock(&rp->mutex); + oldheap = clib_mem_set_heap(rp->data_heap); + clib_mem_free (ptr); + clib_mem_set_heap(oldheap); + pthread_mutex_unlock(&rp->mutex); + +} + +static inline void *svm_push_pvt_heap (svm_region_t *rp) +{ + u8 *oldheap; + oldheap = clib_mem_set_heap(rp->region_heap); + return ((void *) oldheap); +} + +static inline void *svm_push_data_heap (svm_region_t *rp) +{ + u8 *oldheap; + oldheap = clib_mem_set_heap(rp->data_heap); + return ((void *) oldheap); +} + +static inline void svm_pop_heap (void *oldheap) +{ + clib_mem_set_heap(oldheap); +} + +u8 * format_svm_region (u8 * s, va_list * args); + +svm_region_t *svm_get_root_rp (void); + +#endif /* __included_svm_h__ */ |