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-rw-r--r--svm/svm.h207
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diff --git a/svm/svm.h b/svm/svm.h
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-/*
- *------------------------------------------------------------------
- * 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 (clib_mem_get_page_size())
-
-#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 (128<<10) /* region's private mheap (128k) */
-
-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;
- u64 baseva;
- u64 size;
- u64 pvt_heap_size;
- uword flags;
- char *backing_file;
- uword backing_mmap_size;
- /* uid, gid to own the svm region(s) */
- int uid;
- int gid;
-} 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_init_chroot_uid_gid (char *root_path, int uid, int gid);
-void svm_region_init_args (svm_map_region_args_t * a);
-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,
- 1 /* yes, call os_out_of_memory */ );
- 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__ */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */