-/*
+/*
*------------------------------------------------------------------
- * svm.c - shared VM allocation, mmap(...MAP_FIXED...)
+ * svm.c - shared VM allocation, mmap(...MAP_FIXED...)
* library
*
* Copyright (c) 2009 Cisco and/or its affiliates.
static int root_rp_refcount;
#define MAXLOCK 2
-static pthread_mutex_t *mutexes_held [MAXLOCK];
+static pthread_mutex_t *mutexes_held[MAXLOCK];
static int nheld;
-svm_region_t *svm_get_root_rp (void)
+svm_region_t *
+svm_get_root_rp (void)
{
- return root_rp;
+ return root_rp;
}
#define MUTEX_DEBUG
-static void region_lock(svm_region_t *rp, int tag)
+static void
+region_lock (svm_region_t * rp, int tag)
{
- pthread_mutex_lock(&rp->mutex);
+ pthread_mutex_lock (&rp->mutex);
#ifdef MUTEX_DEBUG
- rp->mutex_owner_pid = getpid();
- rp->mutex_owner_tag = tag;
-#endif
- ASSERT(nheld < MAXLOCK);
- /*
- * Keep score of held mutexes so we can try to exit
- * cleanly if the world comes to an end at the worst possible
- * moment
- */
- mutexes_held [nheld++] = &rp->mutex;
+ rp->mutex_owner_pid = getpid ();
+ rp->mutex_owner_tag = tag;
+#endif
+ ASSERT (nheld < MAXLOCK);
+ /*
+ * Keep score of held mutexes so we can try to exit
+ * cleanly if the world comes to an end at the worst possible
+ * moment
+ */
+ mutexes_held[nheld++] = &rp->mutex;
}
-static void region_unlock(svm_region_t *rp)
+static void
+region_unlock (svm_region_t * rp)
{
- int i,j;
+ int i, j;
#ifdef MUTEX_DEBUG
- rp->mutex_owner_pid = 0;
- rp->mutex_owner_tag = 0;
-#endif
-
- for (i = nheld-1; i >= 0; i--) {
- if (mutexes_held[i] == &rp->mutex) {
- for (j = i; j < MAXLOCK-1; j++)
- mutexes_held[j] = mutexes_held[j+1];
- nheld--;
- goto found;
- }
+ rp->mutex_owner_pid = 0;
+ rp->mutex_owner_tag = 0;
+#endif
+
+ for (i = nheld - 1; i >= 0; i--)
+ {
+ if (mutexes_held[i] == &rp->mutex)
+ {
+ for (j = i; j < MAXLOCK - 1; j++)
+ mutexes_held[j] = mutexes_held[j + 1];
+ nheld--;
+ goto found;
+ }
}
- ASSERT(0);
+ ASSERT (0);
found:
- CLIB_MEMORY_BARRIER();
- pthread_mutex_unlock(&rp->mutex);
+ CLIB_MEMORY_BARRIER ();
+ pthread_mutex_unlock (&rp->mutex);
}
-static u8 * format_svm_flags (u8 * s, va_list * args)
+static u8 *
+format_svm_flags (u8 * s, va_list * args)
{
- uword f = va_arg (*args, uword);
-
- if (f & SVM_FLAGS_MHEAP)
- s = format (s, "MHEAP ");
- if (f & SVM_FLAGS_FILE)
- s = format (s, "FILE ");
- if (f & SVM_FLAGS_NODATA)
- s = format (s, "NODATA ");
- if (f & SVM_FLAGS_NEED_DATA_INIT)
- s = format (s, "INIT ");
-
- return (s);
+ uword f = va_arg (*args, uword);
+
+ if (f & SVM_FLAGS_MHEAP)
+ s = format (s, "MHEAP ");
+ if (f & SVM_FLAGS_FILE)
+ s = format (s, "FILE ");
+ if (f & SVM_FLAGS_NODATA)
+ s = format (s, "NODATA ");
+ if (f & SVM_FLAGS_NEED_DATA_INIT)
+ s = format (s, "INIT ");
+
+ return (s);
}
-static u8 * format_svm_size (u8 * s, va_list * args)
+static u8 *
+format_svm_size (u8 * s, va_list * args)
{
- uword size = va_arg (*args, uword);
-
- if (size >= (1<<20)) {
- s = format (s, "(%d mb)", size >> 20);
- } else if (size >= (1<<10)) {
- s = format (s, "(%d kb)", size >> 10);
- } else {
- s = format (s, "(%d bytes)", size);
+ uword size = va_arg (*args, uword);
+
+ if (size >= (1 << 20))
+ {
+ s = format (s, "(%d mb)", size >> 20);
+ }
+ else if (size >= (1 << 10))
+ {
+ s = format (s, "(%d kb)", size >> 10);
}
- return (s);
+ else
+ {
+ s = format (s, "(%d bytes)", size);
+ }
+ return (s);
}
-u8 * format_svm_region (u8 * s, va_list * args)
+u8 *
+format_svm_region (u8 * s, va_list * args)
{
- svm_region_t *rp = va_arg (*args, svm_region_t *);
- int verbose = va_arg (*args, int);
- int i;
- uword lo, hi;
-
- s = format (s, "%s: base va 0x%x size 0x%x %U\n",
- rp->region_name, rp->virtual_base,
- rp->virtual_size, format_svm_size, rp->virtual_size);
- s = format (s, " user_ctx 0x%x, bitmap_size %d\n",
- rp->user_ctx, rp->bitmap_size);
-
- if (verbose) {
- s = format (s, " flags: 0x%x %U\n", rp->flags,
- format_svm_flags, rp->flags);
- s = format (s,
- " region_heap 0x%x data_base 0x%x data_heap 0x%x\n",
- rp->region_heap, rp->data_base, rp->data_heap);
+ svm_region_t *rp = va_arg (*args, svm_region_t *);
+ int verbose = va_arg (*args, int);
+ int i;
+ uword lo, hi;
+
+ s = format (s, "%s: base va 0x%x size 0x%x %U\n",
+ rp->region_name, rp->virtual_base,
+ rp->virtual_size, format_svm_size, rp->virtual_size);
+ s = format (s, " user_ctx 0x%x, bitmap_size %d\n",
+ rp->user_ctx, rp->bitmap_size);
+
+ if (verbose)
+ {
+ s = format (s, " flags: 0x%x %U\n", rp->flags,
+ format_svm_flags, rp->flags);
+ s = format (s,
+ " region_heap 0x%x data_base 0x%x data_heap 0x%x\n",
+ rp->region_heap, rp->data_base, rp->data_heap);
}
- s = format (s, " %d clients, pids: ",
- vec_len(rp->client_pids));
-
- for (i = 0; i < vec_len(rp->client_pids); i++)
- s = format (s, "%d ", rp->client_pids[i]);
-
- s = format (s, "\n");
-
- if (verbose) {
- lo = hi = ~0;
-
- s = format (s, " VM in use: ");
-
- for (i = 0; i < rp->bitmap_size; i++) {
- if (clib_bitmap_get_no_check (rp->bitmap, i) != 0) {
- if (lo == ~0) {
- hi = lo = rp->virtual_base + i*MMAP_PAGESIZE;
- } else {
- hi = rp->virtual_base + i*MMAP_PAGESIZE;
- }
- } else {
- if (lo != ~0) {
- hi = rp->virtual_base + i*MMAP_PAGESIZE -1;
- s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi,
- (hi - lo)>>10);
- lo = hi = ~0;
- }
- }
- }
- s = format (s, " rgn heap stats: %U", format_mheap,
- rp->region_heap, 0);
- if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap) {
- s = format (s, "\n data heap stats: %U", format_mheap,
- rp->data_heap, 1);
- }
- s = format (s, "\n");
+ s = format (s, " %d clients, pids: ", vec_len (rp->client_pids));
+
+ for (i = 0; i < vec_len (rp->client_pids); i++)
+ s = format (s, "%d ", rp->client_pids[i]);
+
+ s = format (s, "\n");
+
+ if (verbose)
+ {
+ lo = hi = ~0;
+
+ s = format (s, " VM in use: ");
+
+ for (i = 0; i < rp->bitmap_size; i++)
+ {
+ if (clib_bitmap_get_no_check (rp->bitmap, i) != 0)
+ {
+ if (lo == ~0)
+ {
+ hi = lo = rp->virtual_base + i * MMAP_PAGESIZE;
+ }
+ else
+ {
+ hi = rp->virtual_base + i * MMAP_PAGESIZE;
+ }
+ }
+ else
+ {
+ if (lo != ~0)
+ {
+ hi = rp->virtual_base + i * MMAP_PAGESIZE - 1;
+ s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi,
+ (hi - lo) >> 10);
+ lo = hi = ~0;
+ }
+ }
+ }
+ s = format (s, " rgn heap stats: %U", format_mheap,
+ rp->region_heap, 0);
+ if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap)
+ {
+ s = format (s, "\n data heap stats: %U", format_mheap,
+ rp->data_heap, 1);
+ }
+ s = format (s, "\n");
}
- return(s);
+ return (s);
}
/*
* rnd_pagesize
* Round to a pagesize multiple, presumably 4k works
*/
-static unsigned int rnd_pagesize(unsigned int size)
+static unsigned int
+rnd_pagesize (unsigned int size)
{
- unsigned int rv;
+ unsigned int rv;
- rv = (size + (MMAP_PAGESIZE-1)) & ~(MMAP_PAGESIZE-1);
- return(rv);
+ rv = (size + (MMAP_PAGESIZE - 1)) & ~(MMAP_PAGESIZE - 1);
+ return (rv);
}
-/*
+/*
* svm_data_region_setup
*/
-static int svm_data_region_create (svm_map_region_args_t *a,
- svm_region_t *rp)
+static int
+svm_data_region_create (svm_map_region_args_t * a, svm_region_t * rp)
{
- int fd;
- u8 junk = 0;
- uword map_size;
-
- map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
-
- if (a->flags & SVM_FLAGS_FILE) {
- struct stat statb;
-
- fd = open (a->backing_file, O_RDWR | O_CREAT, 0777);
-
- if (fd < 0) {
- clib_unix_warning ("open");
- return -1;
- }
-
- if (fstat(fd, &statb) < 0) {
- clib_unix_warning("fstat");
- close (fd);
- return -2;
- }
-
- if (statb.st_mode & S_IFREG) {
- if (statb.st_size == 0) {
- if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) {
- clib_unix_warning ("seek region size");
- close (fd);
- return -3;
- }
- if (write(fd, &junk, 1) != 1) {
- clib_unix_warning ("set region size");
- close (fd);
- return -3;
- }
- } else {
- map_size = rnd_pagesize (statb.st_size);
- }
- } else {
- map_size = a->backing_mmap_size;
- }
-
- ASSERT(map_size <= rp->virtual_size -
- (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
-
- if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
- clib_unix_warning("mmap");
- close (fd);
- return -3;
- }
- close(fd);
- rp->backing_file = (char *) format(0, "%s\0", a->backing_file);
- rp->flags |= SVM_FLAGS_FILE;
+ int fd;
+ u8 junk = 0;
+ uword map_size;
+
+ map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
+
+ if (a->flags & SVM_FLAGS_FILE)
+ {
+ struct stat statb;
+
+ fd = open (a->backing_file, O_RDWR | O_CREAT, 0777);
+
+ if (fd < 0)
+ {
+ clib_unix_warning ("open");
+ return -1;
+ }
+
+ if (fstat (fd, &statb) < 0)
+ {
+ clib_unix_warning ("fstat");
+ close (fd);
+ return -2;
+ }
+
+ if (statb.st_mode & S_IFREG)
+ {
+ if (statb.st_size == 0)
+ {
+ if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1)
+ {
+ clib_unix_warning ("seek region size");
+ close (fd);
+ return -3;
+ }
+ if (write (fd, &junk, 1) != 1)
+ {
+ clib_unix_warning ("set region size");
+ close (fd);
+ return -3;
+ }
+ }
+ else
+ {
+ map_size = rnd_pagesize (statb.st_size);
+ }
+ }
+ else
+ {
+ map_size = a->backing_mmap_size;
+ }
+
+ ASSERT (map_size <= rp->virtual_size -
+ (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
+
+ if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED)
+ {
+ clib_unix_warning ("mmap");
+ close (fd);
+ return -3;
+ }
+ close (fd);
+ rp->backing_file = (char *) format (0, "%s\0", a->backing_file);
+ rp->flags |= SVM_FLAGS_FILE;
}
-
- if (a->flags & SVM_FLAGS_MHEAP) {
- rp->data_heap =
- mheap_alloc_with_flags ((void *)(rp->data_base), map_size,
- MHEAP_FLAG_DISABLE_VM);
- rp->flags |= SVM_FLAGS_MHEAP;
+
+ if (a->flags & SVM_FLAGS_MHEAP)
+ {
+ rp->data_heap =
+ mheap_alloc_with_flags ((void *) (rp->data_base), map_size,
+ MHEAP_FLAG_DISABLE_VM);
+ rp->flags |= SVM_FLAGS_MHEAP;
}
- return 0;
+ return 0;
}
-static int svm_data_region_map (svm_map_region_args_t *a,
- svm_region_t *rp)
+static int
+svm_data_region_map (svm_map_region_args_t * a, svm_region_t * rp)
{
- int fd;
- u8 junk = 0;
- uword map_size;
- struct stat statb;
-
- map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
-
- if (a->flags & SVM_FLAGS_FILE) {
-
- fd = open (a->backing_file, O_RDWR, 0777);
-
- if (fd < 0) {
- clib_unix_warning ("open");
- return -1;
- }
-
- if (fstat(fd, &statb) < 0) {
- clib_unix_warning("fstat");
- close (fd);
- return -2;
- }
-
- if (statb.st_mode & S_IFREG) {
- if (statb.st_size == 0) {
- if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) {
- clib_unix_warning ("seek region size");
- close (fd);
- return -3;
- }
- if (write(fd, &junk, 1) != 1) {
- clib_unix_warning ("set region size");
- close (fd);
- return -3;
- }
- } else {
- map_size = rnd_pagesize (statb.st_size);
- }
- } else {
- map_size = a->backing_mmap_size;
- }
-
- ASSERT(map_size <= rp->virtual_size
- - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
-
- if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) {
- clib_unix_warning("mmap");
- close (fd);
- return -3;
- }
- close(fd);
+ int fd;
+ u8 junk = 0;
+ uword map_size;
+ struct stat statb;
+
+ map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE);
+
+ if (a->flags & SVM_FLAGS_FILE)
+ {
+
+ fd = open (a->backing_file, O_RDWR, 0777);
+
+ if (fd < 0)
+ {
+ clib_unix_warning ("open");
+ return -1;
+ }
+
+ if (fstat (fd, &statb) < 0)
+ {
+ clib_unix_warning ("fstat");
+ close (fd);
+ return -2;
+ }
+
+ if (statb.st_mode & S_IFREG)
+ {
+ if (statb.st_size == 0)
+ {
+ if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1)
+ {
+ clib_unix_warning ("seek region size");
+ close (fd);
+ return -3;
+ }
+ if (write (fd, &junk, 1) != 1)
+ {
+ clib_unix_warning ("set region size");
+ close (fd);
+ return -3;
+ }
+ }
+ else
+ {
+ map_size = rnd_pagesize (statb.st_size);
+ }
+ }
+ else
+ {
+ map_size = a->backing_mmap_size;
+ }
+
+ ASSERT (map_size <= rp->virtual_size
+ - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE));
+
+ if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED)
+ {
+ clib_unix_warning ("mmap");
+ close (fd);
+ return -3;
+ }
+ close (fd);
}
- return 0;
+ return 0;
}
-u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a)
+u8 *
+shm_name_from_svm_map_region_args (svm_map_region_args_t * a)
{
- u8 *path;
- u8 *shm_name;
- u8 *split_point;
- u8 *mkdir_arg = 0;
- int root_path_offset = 0;
- int name_offset = 0;
-
- if (a->root_path) {
- /* Tolerate present or absent slashes */
- if (a->root_path[0] == '/')
- root_path_offset++;
-
- /* create the root_path under /dev/shm
- iterate through path creating directories */
-
- path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0);
- split_point = path+1;
- vec_add1(mkdir_arg, '-');
-
- while (*split_point) {
- while (*split_point && *split_point != '/') {
- vec_add1 (mkdir_arg, *split_point);
- split_point++;
- }
- vec_add1 (mkdir_arg, 0);
-
- /* ready to descend another level */
- mkdir_arg[vec_len(mkdir_arg)-1] = '-';
- split_point++;
- }
- vec_free(mkdir_arg);
- vec_free(path);
-
- if (a->name[0] == '/')
- name_offset = 1;
-
- shm_name = format (0, "/%s-%s%c", a->root_path,
- &a->name[name_offset], 0);
+ u8 *path;
+ u8 *shm_name;
+ u8 *split_point;
+ u8 *mkdir_arg = 0;
+ int root_path_offset = 0;
+ int name_offset = 0;
+
+ if (a->root_path)
+ {
+ /* Tolerate present or absent slashes */
+ if (a->root_path[0] == '/')
+ root_path_offset++;
+
+ /* create the root_path under /dev/shm
+ iterate through path creating directories */
+
+ path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0);
+ split_point = path + 1;
+ vec_add1 (mkdir_arg, '-');
+
+ while (*split_point)
+ {
+ while (*split_point && *split_point != '/')
+ {
+ vec_add1 (mkdir_arg, *split_point);
+ split_point++;
+ }
+ vec_add1 (mkdir_arg, 0);
+
+ /* ready to descend another level */
+ mkdir_arg[vec_len (mkdir_arg) - 1] = '-';
+ split_point++;
+ }
+ vec_free (mkdir_arg);
+ vec_free (path);
+
+ if (a->name[0] == '/')
+ name_offset = 1;
+
+ shm_name = format (0, "/%s-%s%c", a->root_path,
+ &a->name[name_offset], 0);
}
- else
- shm_name = format (0, "%s%c", a->name, 0);
- return (shm_name);
+ else
+ shm_name = format (0, "%s%c", a->name, 0);
+ return (shm_name);
}
/*
* svm_map_region
*/
-void *svm_map_region (svm_map_region_args_t *a)
+void *
+svm_map_region (svm_map_region_args_t * a)
{
- int svm_fd;
- svm_region_t *rp;
- pthread_mutexattr_t attr;
- pthread_condattr_t cattr;
- int deadman=0;
- u8 junk = 0;
- void *oldheap;
- int overhead_space;
- int rv;
- uword data_base;
- int nbits, words, bit;
- int pid_holding_region_lock;
- u8 *shm_name;
- int dead_region_recovery = 0;
- int time_left;
- struct stat stat;
- struct timespec ts, tsrem;
-
- if (CLIB_DEBUG > 1)
- clib_warning ("[%d] map region %s", getpid(), a->name);
-
- ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
- ASSERT(a->name);
-
- shm_name = shm_name_from_svm_map_region_args (a);
-
- svm_fd = shm_open((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777);
-
- if (svm_fd >= 0) {
- if (fchmod (svm_fd, 0770) < 0)
- clib_unix_warning ("segment chmod");
- /* This turns out to fail harmlessly if the client starts first */
- if (fchown (svm_fd, a->uid, a->gid) < 0)
- clib_unix_warning ("segment chown [ok if client starts first]");
-
- vec_free(shm_name);
-
- if (lseek(svm_fd, a->size, SEEK_SET) == (off_t) -1) {
- clib_warning ("seek region size");
- close (svm_fd);
- return (0);
- }
- if (write(svm_fd, &junk, 1) != 1) {
- clib_warning ("set region size");
- close (svm_fd);
- return (0);
- }
-
- rp = mmap((void *)a->baseva, a->size,
- PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0);
-
- if (rp == (svm_region_t *) MAP_FAILED) {
- clib_unix_warning ("mmap create");
- close (svm_fd);
- return (0);
- }
- close(svm_fd);
- memset(rp, 0, sizeof(*rp));
-
- if (pthread_mutexattr_init(&attr))
- clib_unix_warning("mutexattr_init");
-
- if (pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED))
- clib_unix_warning("mutexattr_setpshared");
-
- if (pthread_mutex_init(&rp->mutex, &attr))
- clib_unix_warning("mutex_init");
-
- if (pthread_mutexattr_destroy(&attr))
- clib_unix_warning("mutexattr_destroy");
-
- if (pthread_condattr_init(&cattr))
- clib_unix_warning("condattr_init");
-
- if (pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED))
- clib_unix_warning("condattr_setpshared");
-
- if (pthread_cond_init(&rp->condvar, &cattr))
- clib_unix_warning("cond_init");
-
- if(pthread_condattr_destroy(&cattr))
- clib_unix_warning("condattr_destroy");
-
- region_lock (rp, 1);
-
- rp->virtual_base = a->baseva;
- rp->virtual_size = a->size;
-
- rp->region_heap =
- mheap_alloc_with_flags ((void *)(a->baseva+MMAP_PAGESIZE),
- SVM_PVT_MHEAP_SIZE,
- MHEAP_FLAG_DISABLE_VM);
- oldheap = svm_push_pvt_heap(rp);
-
- rp->region_name = (char *)format (0, "%s%c", a->name, 0);
- vec_add1(rp->client_pids, getpid());
-
- nbits = rp->virtual_size / MMAP_PAGESIZE;
-
- ASSERT (nbits > 0);
- rp->bitmap_size = nbits;
- words = (nbits + BITS(uword)-1) / BITS(uword);
- vec_validate (rp->bitmap, words-1);
-
- overhead_space = MMAP_PAGESIZE /* header */ +
- SVM_PVT_MHEAP_SIZE;
-
- bit = 0;
- data_base = (uword)rp->virtual_base;
-
- if (a->flags & SVM_FLAGS_NODATA)
- rp->flags |= SVM_FLAGS_NEED_DATA_INIT;
-
- do {
- clib_bitmap_set_no_check (rp->bitmap, bit, 1);
- bit++;
- overhead_space -= MMAP_PAGESIZE;
- data_base += MMAP_PAGESIZE;
- } while (overhead_space > 0);
-
- rp->data_base = (void *)data_base;
-
- /*
- * Note: although the POSIX spec guarantees that only one
- * process enters this block, we have to play games
- * to hold off clients until e.g. the mutex is ready
- */
- rp->version = SVM_VERSION;
-
- /* setup the data portion of the region */
-
- rv = svm_data_region_create (a, rp);
- if (rv) {
- clib_warning ("data_region_create: %d", rv);
- }
-
- region_unlock(rp);
-
- svm_pop_heap(oldheap);
-
- return ((void *) rp);
- } else {
- svm_fd = shm_open((char *)shm_name, O_RDWR, 0777);
-
- vec_free(shm_name);
-
- if (svm_fd < 0) {
- perror("svm_region_map(mmap open)");
- return (0);
- }
-
- time_left = 20;
- while (1) {
- if (0 != fstat(svm_fd, &stat)) {
- clib_warning("fstat failed: %d", errno);
- close (svm_fd);
- return (0);
- }
- if (stat.st_size > 0) {
- break;
- }
- if (0 == time_left) {
- clib_warning("waiting for resize of shm file timed out");
- close (svm_fd);
- return (0);
- }
- ts.tv_sec = 0;
- ts.tv_nsec = 100000000;
- while (nanosleep(&ts, &tsrem) < 0)
- ts = tsrem;
- time_left--;
- }
-
- rp = mmap(0, MMAP_PAGESIZE,
- PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0);
-
- if (rp == (svm_region_t *) MAP_FAILED) {
- close(svm_fd);
- clib_warning("mmap");
- return (0);
- }
- /*
- * We lost the footrace to create this region; make sure
- * the winner has crossed the finish line.
- */
- while (rp->version == 0 && deadman++ < 5) {
- sleep(1);
- }
-
- /*
- * <bleep>-ed?
- */
- if (rp->version == 0) {
- clib_warning("rp->version %d not %d", rp->version,
- SVM_VERSION);
- close(svm_fd);
- munmap(rp, a->size);
- return (0);
- }
- /* Remap now that the region has been placed */
- a->baseva = rp->virtual_base;
- a->size = rp->virtual_size;
- munmap(rp, MMAP_PAGESIZE);
-
- rp = (void *) mmap ((void *)a->baseva, a->size,
- PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_FIXED, svm_fd, 0);
- if ((uword)rp == (uword)MAP_FAILED) {
- clib_unix_warning ("mmap");
- close (svm_fd);
- return (0);
- }
-
- if ((uword) rp != rp->virtual_base) {
- clib_warning("mmap botch");
- }
-
- /*
- * Try to fix the region mutex if it is held by
- * a dead process
- */
- pid_holding_region_lock = rp->mutex_owner_pid;
- if (pid_holding_region_lock &&
- kill (pid_holding_region_lock, 0) < 0) {
- clib_warning (
- "region %s mutex held by dead pid %d, tag %d, force unlock",
- rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag);
- /* owner pid is nonexistent */
- rp->mutex.__data.__owner = 0;
- rp->mutex.__data.__lock = 0;
- dead_region_recovery = 1;
- }
-
- if (dead_region_recovery)
- clib_warning ("recovery: attempt to re-lock region");
-
- region_lock(rp, 2);
- oldheap = svm_push_pvt_heap (rp);
- vec_add1(rp->client_pids, getpid());
-
- if (dead_region_recovery)
- clib_warning ("recovery: attempt svm_data_region_map");
-
- rv = svm_data_region_map (a, rp);
- if (rv) {
- clib_warning ("data_region_map: %d", rv);
- }
-
- if (dead_region_recovery)
- clib_warning ("unlock and continue");
-
- region_unlock(rp);
-
- svm_pop_heap(oldheap);
-
- return ((void *) rp);
+ int svm_fd;
+ svm_region_t *rp;
+ pthread_mutexattr_t attr;
+ pthread_condattr_t cattr;
+ int deadman = 0;
+ u8 junk = 0;
+ void *oldheap;
+ int overhead_space;
+ int rv;
+ uword data_base;
+ int nbits, words, bit;
+ int pid_holding_region_lock;
+ u8 *shm_name;
+ int dead_region_recovery = 0;
+ int time_left;
+ struct stat stat;
+ struct timespec ts, tsrem;
+
+ if (CLIB_DEBUG > 1)
+ clib_warning ("[%d] map region %s", getpid (), a->name);
+
+ ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size);
+ ASSERT (a->name);
+
+ shm_name = shm_name_from_svm_map_region_args (a);
+
+ svm_fd = shm_open ((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777);
+
+ if (svm_fd >= 0)
+ {
+ if (fchmod (svm_fd, 0770) < 0)
+ clib_unix_warning ("segment chmod");
+ /* This turns out to fail harmlessly if the client starts first */
+ if (fchown (svm_fd, a->uid, a->gid) < 0)
+ clib_unix_warning ("segment chown [ok if client starts first]");
+
+ vec_free (shm_name);
+
+ if (lseek (svm_fd, a->size, SEEK_SET) == (off_t) - 1)
+ {
+ clib_warning ("seek region size");
+ close (svm_fd);
+ return (0);
+ }
+ if (write (svm_fd, &junk, 1) != 1)
+ {
+ clib_warning ("set region size");
+ close (svm_fd);
+ return (0);
+ }
+
+ rp = mmap ((void *) a->baseva, a->size,
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0);
+
+ if (rp == (svm_region_t *) MAP_FAILED)
+ {
+ clib_unix_warning ("mmap create");
+ close (svm_fd);
+ return (0);
+ }
+ close (svm_fd);
+ memset (rp, 0, sizeof (*rp));
+
+ if (pthread_mutexattr_init (&attr))
+ clib_unix_warning ("mutexattr_init");
+
+ if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED))
+ clib_unix_warning ("mutexattr_setpshared");
+
+ if (pthread_mutex_init (&rp->mutex, &attr))
+ clib_unix_warning ("mutex_init");
+
+ if (pthread_mutexattr_destroy (&attr))
+ clib_unix_warning ("mutexattr_destroy");
+
+ if (pthread_condattr_init (&cattr))
+ clib_unix_warning ("condattr_init");
+
+ if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED))
+ clib_unix_warning ("condattr_setpshared");
+
+ if (pthread_cond_init (&rp->condvar, &cattr))
+ clib_unix_warning ("cond_init");
+
+ if (pthread_condattr_destroy (&cattr))
+ clib_unix_warning ("condattr_destroy");
+
+ region_lock (rp, 1);
+
+ rp->virtual_base = a->baseva;
+ rp->virtual_size = a->size;
+
+ rp->region_heap =
+ mheap_alloc_with_flags ((void *) (a->baseva + MMAP_PAGESIZE),
+ SVM_PVT_MHEAP_SIZE, MHEAP_FLAG_DISABLE_VM);
+ oldheap = svm_push_pvt_heap (rp);
+
+ rp->region_name = (char *) format (0, "%s%c", a->name, 0);
+ vec_add1 (rp->client_pids, getpid ());
+
+ nbits = rp->virtual_size / MMAP_PAGESIZE;
+
+ ASSERT (nbits > 0);
+ rp->bitmap_size = nbits;
+ words = (nbits + BITS (uword) - 1) / BITS (uword);
+ vec_validate (rp->bitmap, words - 1);
+
+ overhead_space = MMAP_PAGESIZE /* header */ +
+ SVM_PVT_MHEAP_SIZE;
+
+ bit = 0;
+ data_base = (uword) rp->virtual_base;
+
+ if (a->flags & SVM_FLAGS_NODATA)
+ rp->flags |= SVM_FLAGS_NEED_DATA_INIT;
+
+ do
+ {
+ clib_bitmap_set_no_check (rp->bitmap, bit, 1);
+ bit++;
+ overhead_space -= MMAP_PAGESIZE;
+ data_base += MMAP_PAGESIZE;
+ }
+ while (overhead_space > 0);
+
+ rp->data_base = (void *) data_base;
+
+ /*
+ * Note: although the POSIX spec guarantees that only one
+ * process enters this block, we have to play games
+ * to hold off clients until e.g. the mutex is ready
+ */
+ rp->version = SVM_VERSION;
+
+ /* setup the data portion of the region */
+
+ rv = svm_data_region_create (a, rp);
+ if (rv)
+ {
+ clib_warning ("data_region_create: %d", rv);
+ }
+
+ region_unlock (rp);
+
+ svm_pop_heap (oldheap);
+
+ return ((void *) rp);
+ }
+ else
+ {
+ svm_fd = shm_open ((char *) shm_name, O_RDWR, 0777);
+
+ vec_free (shm_name);
+
+ if (svm_fd < 0)
+ {
+ perror ("svm_region_map(mmap open)");
+ return (0);
+ }
+
+ time_left = 20;
+ while (1)
+ {
+ if (0 != fstat (svm_fd, &stat))
+ {
+ clib_warning ("fstat failed: %d", errno);
+ close (svm_fd);
+ return (0);
+ }
+ if (stat.st_size > 0)
+ {
+ break;
+ }
+ if (0 == time_left)
+ {
+ clib_warning ("waiting for resize of shm file timed out");
+ close (svm_fd);
+ return (0);
+ }
+ ts.tv_sec = 0;
+ ts.tv_nsec = 100000000;
+ while (nanosleep (&ts, &tsrem) < 0)
+ ts = tsrem;
+ time_left--;
+ }
+
+ rp = mmap (0, MMAP_PAGESIZE,
+ PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0);
+
+ if (rp == (svm_region_t *) MAP_FAILED)
+ {
+ close (svm_fd);
+ clib_warning ("mmap");
+ return (0);
+ }
+ /*
+ * We lost the footrace to create this region; make sure
+ * the winner has crossed the finish line.
+ */
+ while (rp->version == 0 && deadman++ < 5)
+ {
+ sleep (1);
+ }
+
+ /*
+ * <bleep>-ed?
+ */
+ if (rp->version == 0)
+ {
+ clib_warning ("rp->version %d not %d", rp->version, SVM_VERSION);
+ close (svm_fd);
+ munmap (rp, a->size);
+ return (0);
+ }
+ /* Remap now that the region has been placed */
+ a->baseva = rp->virtual_base;
+ a->size = rp->virtual_size;
+ munmap (rp, MMAP_PAGESIZE);
+
+ rp = (void *) mmap ((void *) a->baseva, a->size,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_FIXED, svm_fd, 0);
+ if ((uword) rp == (uword) MAP_FAILED)
+ {
+ clib_unix_warning ("mmap");
+ close (svm_fd);
+ return (0);
+ }
+
+ if ((uword) rp != rp->virtual_base)
+ {
+ clib_warning ("mmap botch");
+ }
+
+ /*
+ * Try to fix the region mutex if it is held by
+ * a dead process
+ */
+ pid_holding_region_lock = rp->mutex_owner_pid;
+ if (pid_holding_region_lock && kill (pid_holding_region_lock, 0) < 0)
+ {
+ clib_warning
+ ("region %s mutex held by dead pid %d, tag %d, force unlock",
+ rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag);
+ /* owner pid is nonexistent */
+ rp->mutex.__data.__owner = 0;
+ rp->mutex.__data.__lock = 0;
+ dead_region_recovery = 1;
+ }
+
+ if (dead_region_recovery)
+ clib_warning ("recovery: attempt to re-lock region");
+
+ region_lock (rp, 2);
+ oldheap = svm_push_pvt_heap (rp);
+ vec_add1 (rp->client_pids, getpid ());
+
+ if (dead_region_recovery)
+ clib_warning ("recovery: attempt svm_data_region_map");
+
+ rv = svm_data_region_map (a, rp);
+ if (rv)
+ {
+ clib_warning ("data_region_map: %d", rv);
+ }
+
+ if (dead_region_recovery)
+ clib_warning ("unlock and continue");
+
+ region_unlock (rp);
+
+ svm_pop_heap (oldheap);
+
+ return ((void *) rp);
}
- return 0; /* NOTREACHED */
+ return 0; /* NOTREACHED */
}
-static void svm_mutex_cleanup (void)
+static void
+svm_mutex_cleanup (void)
{
- int i;
- for (i = 0; i < nheld; i++) {
- pthread_mutex_unlock (mutexes_held[i]);
+ int i;
+ for (i = 0; i < nheld; i++)
+ {
+ pthread_mutex_unlock (mutexes_held[i]);
}
}
-static void svm_region_init_internal (char *root_path, int uid, int gid)
+static void
+svm_region_init_internal (char *root_path, int uid, int gid)
{
- svm_region_t *rp;
- svm_map_region_args_t _a, *a=&_a;
- u64 ticks = clib_cpu_time_now();
- uword randomize_baseva;
-
- /* guard against klutz calls */
- if (root_rp)
- return;
-
- root_rp_refcount++;
-
- atexit(svm_mutex_cleanup);
-
- /* Randomize the shared-VM base at init time */
- if (MMAP_PAGESIZE <= (4<<10))
- randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
- else
- randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
-
- memset (a, 0, sizeof (*a));
- a->root_path = root_path;
- a->name = SVM_GLOBAL_REGION_NAME;
- a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva;
- a->size = SVM_GLOBAL_REGION_SIZE;
- a->flags = SVM_FLAGS_NODATA;
- a->uid = uid;
- a->gid = gid;
-
- rp = svm_map_region (a);
- ASSERT(rp);
-
- region_lock(rp, 3);
-
- /* Set up the main region data structures */
- if (rp->flags & SVM_FLAGS_NEED_DATA_INIT) {
- svm_main_region_t *mp = 0;
- void *oldheap;
-
- rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT);
-
- oldheap = svm_push_pvt_heap (rp);
- vec_validate (mp, 0);
- mp->name_hash = hash_create_string (0, sizeof(uword));
- mp->root_path = root_path
- ? format (0, "%s%c", root_path, 0) : 0 ;
- rp->data_base = mp;
- svm_pop_heap (oldheap);
+ svm_region_t *rp;
+ svm_map_region_args_t _a, *a = &_a;
+ u64 ticks = clib_cpu_time_now ();
+ uword randomize_baseva;
+
+ /* guard against klutz calls */
+ if (root_rp)
+ return;
+
+ root_rp_refcount++;
+
+ atexit (svm_mutex_cleanup);
+
+ /* Randomize the shared-VM base at init time */
+ if (MMAP_PAGESIZE <= (4 << 10))
+ randomize_baseva = (ticks & 15) * MMAP_PAGESIZE;
+ else
+ randomize_baseva = (ticks & 3) * MMAP_PAGESIZE;
+
+ memset (a, 0, sizeof (*a));
+ a->root_path = root_path;
+ a->name = SVM_GLOBAL_REGION_NAME;
+ a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva;
+ a->size = SVM_GLOBAL_REGION_SIZE;
+ a->flags = SVM_FLAGS_NODATA;
+ a->uid = uid;
+ a->gid = gid;
+
+ rp = svm_map_region (a);
+ ASSERT (rp);
+
+ region_lock (rp, 3);
+
+ /* Set up the main region data structures */
+ if (rp->flags & SVM_FLAGS_NEED_DATA_INIT)
+ {
+ svm_main_region_t *mp = 0;
+ void *oldheap;
+
+ rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT);
+
+ oldheap = svm_push_pvt_heap (rp);
+ vec_validate (mp, 0);
+ mp->name_hash = hash_create_string (0, sizeof (uword));
+ mp->root_path = root_path ? format (0, "%s%c", root_path, 0) : 0;
+ rp->data_base = mp;
+ svm_pop_heap (oldheap);
}
- region_unlock(rp);
- root_rp = rp;
+ region_unlock (rp);
+ root_rp = rp;
}
-void svm_region_init (void)
+void
+svm_region_init (void)
{
- svm_region_init_internal (0, 0 /* uid */, 0 /* gid */);
+ svm_region_init_internal (0, 0 /* uid */ , 0 /* gid */ );
}
-void svm_region_init_chroot (char *root_path)
+void
+svm_region_init_chroot (char *root_path)
{
- svm_region_init_internal (root_path, 0 /* uid */, 0 /* gid */);
+ svm_region_init_internal (root_path, 0 /* uid */ , 0 /* gid */ );
}
-void svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid)
+void
+svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid)
{
- svm_region_init_internal (root_path, uid, gid);
+ svm_region_init_internal (root_path, uid, gid);
}
-void *svm_region_find_or_create (svm_map_region_args_t *a)
+void *
+svm_region_find_or_create (svm_map_region_args_t * a)
{
- svm_main_region_t *mp;
- svm_region_t *rp;
- uword need_nbits;
- int index, i;
- void *oldheap;
- uword *p;
- u8 *name;
- svm_subregion_t *subp;
-
- ASSERT(root_rp);
-
- a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE;
- a->size = rnd_pagesize(a->size);
-
- region_lock (root_rp, 4);
- oldheap = svm_push_pvt_heap(root_rp);
- mp = root_rp->data_base;
-
- ASSERT(mp);
-
- /* Map the named region from the correct chroot environment */
- a->root_path = (char *) mp->root_path;
-
- /*
- * See if this region is already known. If it is, we're
- * almost done...
- */
- p = hash_get_mem (mp->name_hash, a->name);
-
- if (p) {
- rp = svm_map_region (a);
- region_unlock(root_rp);
- svm_pop_heap (oldheap);
- return rp;
+ svm_main_region_t *mp;
+ svm_region_t *rp;
+ uword need_nbits;
+ int index, i;
+ void *oldheap;
+ uword *p;
+ u8 *name;
+ svm_subregion_t *subp;
+
+ ASSERT (root_rp);
+
+ a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE;
+ a->size = rnd_pagesize (a->size);
+
+ region_lock (root_rp, 4);
+ oldheap = svm_push_pvt_heap (root_rp);
+ mp = root_rp->data_base;
+
+ ASSERT (mp);
+
+ /* Map the named region from the correct chroot environment */
+ a->root_path = (char *) mp->root_path;
+
+ /*
+ * See if this region is already known. If it is, we're
+ * almost done...
+ */
+ p = hash_get_mem (mp->name_hash, a->name);
+
+ if (p)
+ {
+ rp = svm_map_region (a);
+ region_unlock (root_rp);
+ svm_pop_heap (oldheap);
+ return rp;
}
-
- /* Create the region. */
- ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size);
-
- need_nbits = a->size / MMAP_PAGESIZE;
-
- index = 1; /* $$$ fixme, figure out how many bit to really skip */
-
- /*
- * Scan the virtual space allocation bitmap, looking for a large
- * enough chunk
- */
- do {
- if (clib_bitmap_get_no_check(root_rp->bitmap, index) == 0) {
- for (i = 0; i < (need_nbits-1); i++) {
- if (clib_bitmap_get_no_check(root_rp->bitmap,
- index+i) == 1) {
- index = index + i;
- goto next;
- }
- }
- break;
- }
- index++;
+
+ /* Create the region. */
+ ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size);
+
+ need_nbits = a->size / MMAP_PAGESIZE;
+
+ index = 1; /* $$$ fixme, figure out how many bit to really skip */
+
+ /*
+ * Scan the virtual space allocation bitmap, looking for a large
+ * enough chunk
+ */
+ do
+ {
+ if (clib_bitmap_get_no_check (root_rp->bitmap, index) == 0)
+ {
+ for (i = 0; i < (need_nbits - 1); i++)
+ {
+ if (clib_bitmap_get_no_check (root_rp->bitmap, index + i) == 1)
+ {
+ index = index + i;
+ goto next;
+ }
+ }
+ break;
+ }
+ index++;
next:;
- } while (index < root_rp->bitmap_size);
-
- /* Completely out of VM? */
- if (index >= root_rp->bitmap_size) {
- clib_warning("region %s: not enough VM to allocate 0x%x",
- root_rp->region_name, a->size);
- svm_pop_heap (oldheap);
- region_unlock (root_rp);
- return 0;
}
-
- /*
- * Mark virtual space allocated
- */
+ while (index < root_rp->bitmap_size);
+
+ /* Completely out of VM? */
+ if (index >= root_rp->bitmap_size)
+ {
+ clib_warning ("region %s: not enough VM to allocate 0x%x",
+ root_rp->region_name, a->size);
+ svm_pop_heap (oldheap);
+ region_unlock (root_rp);
+ return 0;
+ }
+
+ /*
+ * Mark virtual space allocated
+ */
#if CLIB_DEBUG > 1
- clib_warning ("set %d bits at index %d", need_nbits, index);
+ clib_warning ("set %d bits at index %d", need_nbits, index);
#endif
- for (i = 0; i < need_nbits; i++) {
- clib_bitmap_set_no_check (root_rp->bitmap, index+i, 1);
+ for (i = 0; i < need_nbits; i++)
+ {
+ clib_bitmap_set_no_check (root_rp->bitmap, index + i, 1);
}
- /* Place this region where it goes... */
- a->baseva = root_rp->virtual_base + index*MMAP_PAGESIZE;
+ /* Place this region where it goes... */
+ a->baseva = root_rp->virtual_base + index * MMAP_PAGESIZE;
+
+ rp = svm_map_region (a);
- rp = svm_map_region (a);
-
- pool_get (mp->subregions, subp);
- name = format (0, "%s%c", a->name, 0);
- subp->subregion_name = name;
+ pool_get (mp->subregions, subp);
+ name = format (0, "%s%c", a->name, 0);
+ subp->subregion_name = name;
- hash_set_mem (mp->name_hash, name, subp - mp->subregions);
+ hash_set_mem (mp->name_hash, name, subp - mp->subregions);
- svm_pop_heap (oldheap);
+ svm_pop_heap (oldheap);
- region_unlock (root_rp);
+ region_unlock (root_rp);
- return (rp);
+ return (rp);
}
/*
* The root region mutex guarantees atomicity with respect to
* a new region client showing up at the wrong moment.
*/
-void svm_region_unmap (void *rp_arg)
+void
+svm_region_unmap (void *rp_arg)
{
- int i, mypid = getpid();
- int nclients_left;
- void *oldheap;
- uword virtual_base, virtual_size;
- svm_region_t *rp = rp_arg;
- char *name;
-
- /*
- * If we take a signal while holding one or more shared-memory
- * mutexes, we may end up back here from an otherwise
- * benign exit handler. Bail out to avoid a recursive
- * mutex screw-up.
- */
- if (nheld)
- return;
-
- ASSERT(rp);
- ASSERT(root_rp);
-
- if (CLIB_DEBUG > 1)
- clib_warning ("[%d] unmap region %s", getpid(), rp->region_name);
-
- region_lock (root_rp, 5);
- region_lock (rp, 6);
-
- oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
-
- /* Remove the caller from the list of mappers */
- for (i = 0; i < vec_len(rp->client_pids); i++) {
- if (rp->client_pids[i] == mypid) {
- vec_delete (rp->client_pids, 1, i);
- goto found;
- }
+ int i, mypid = getpid ();
+ int nclients_left;
+ void *oldheap;
+ uword virtual_base, virtual_size;
+ svm_region_t *rp = rp_arg;
+ char *name;
+
+ /*
+ * If we take a signal while holding one or more shared-memory
+ * mutexes, we may end up back here from an otherwise
+ * benign exit handler. Bail out to avoid a recursive
+ * mutex screw-up.
+ */
+ if (nheld)
+ return;
+
+ ASSERT (rp);
+ ASSERT (root_rp);
+
+ if (CLIB_DEBUG > 1)
+ clib_warning ("[%d] unmap region %s", getpid (), rp->region_name);
+
+ region_lock (root_rp, 5);
+ region_lock (rp, 6);
+
+ oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */
+
+ /* Remove the caller from the list of mappers */
+ for (i = 0; i < vec_len (rp->client_pids); i++)
+ {
+ if (rp->client_pids[i] == mypid)
+ {
+ vec_delete (rp->client_pids, 1, i);
+ goto found;
+ }
}
- clib_warning("pid %d AWOL", mypid);
+ clib_warning ("pid %d AWOL", mypid);
- found:
+found:
- svm_pop_heap (oldheap);
+ svm_pop_heap (oldheap);
- nclients_left = vec_len(rp->client_pids);
- virtual_base = rp->virtual_base;
- virtual_size = rp->virtual_size;
+ nclients_left = vec_len (rp->client_pids);
+ virtual_base = rp->virtual_base;
+ virtual_size = rp->virtual_size;
- if (nclients_left == 0) {
- int index, nbits, i;
- svm_main_region_t *mp;
- uword *p;
- svm_subregion_t *subp;
+ if (nclients_left == 0)
+ {
+ int index, nbits, i;
+ svm_main_region_t *mp;
+ uword *p;
+ svm_subregion_t *subp;
- /* Kill the region, last guy on his way out */
+ /* Kill the region, last guy on his way out */
- oldheap = svm_push_pvt_heap (root_rp);
- name = vec_dup (rp->region_name);
+ oldheap = svm_push_pvt_heap (root_rp);
+ name = vec_dup (rp->region_name);
- virtual_base = rp->virtual_base;
- virtual_size = rp->virtual_size;
+ virtual_base = rp->virtual_base;
+ virtual_size = rp->virtual_size;
- /* Figure out which bits to clear in the root region bitmap */
- index = (virtual_base - root_rp->virtual_base)
- / MMAP_PAGESIZE;
+ /* Figure out which bits to clear in the root region bitmap */
+ index = (virtual_base - root_rp->virtual_base) / MMAP_PAGESIZE;
- nbits = (virtual_size + MMAP_PAGESIZE - 1)
- / MMAP_PAGESIZE;
+ nbits = (virtual_size + MMAP_PAGESIZE - 1) / MMAP_PAGESIZE;
#if CLIB_DEBUG > 1
- clib_warning ("clear %d bits at index %d", nbits, index);
+ clib_warning ("clear %d bits at index %d", nbits, index);
#endif
- /* Give back the allocated VM */
- for (i = 0; i < nbits; i++) {
- clib_bitmap_set_no_check (root_rp->bitmap, index+i, 0);
- }
-
- mp = root_rp->data_base;
-
- p = hash_get_mem (mp->name_hash, name);
-
- /* Better never happen ... */
- if (p == NULL) {
- region_unlock (rp);
- region_unlock (root_rp);
- svm_pop_heap (oldheap);
- clib_warning ("Region name '%s' not found?", name);
- return;
- }
-
- /* Remove from the root region subregion pool */
- subp = mp->subregions + p[0];
- pool_put (mp->subregions, subp);
-
- hash_unset_mem (mp->name_hash, name);
-
- vec_free(name);
-
- region_unlock (rp);
- shm_unlink(rp->region_name);
- munmap ((void *)virtual_base, virtual_size);
- region_unlock (root_rp);
- svm_pop_heap (oldheap);
- return;
+ /* Give back the allocated VM */
+ for (i = 0; i < nbits; i++)
+ {
+ clib_bitmap_set_no_check (root_rp->bitmap, index + i, 0);
+ }
+
+ mp = root_rp->data_base;
+
+ p = hash_get_mem (mp->name_hash, name);
+
+ /* Better never happen ... */
+ if (p == NULL)
+ {
+ region_unlock (rp);
+ region_unlock (root_rp);
+ svm_pop_heap (oldheap);
+ clib_warning ("Region name '%s' not found?", name);
+ return;
+ }
+
+ /* Remove from the root region subregion pool */
+ subp = mp->subregions + p[0];
+ pool_put (mp->subregions, subp);
+
+ hash_unset_mem (mp->name_hash, name);
+
+ vec_free (name);
+
+ region_unlock (rp);
+ shm_unlink (rp->region_name);
+ munmap ((void *) virtual_base, virtual_size);
+ region_unlock (root_rp);
+ svm_pop_heap (oldheap);
+ return;
}
- region_unlock(rp);
- region_unlock(root_rp);
+ region_unlock (rp);
+ region_unlock (root_rp);
- munmap ((void *)virtual_base, virtual_size);
+ munmap ((void *) virtual_base, virtual_size);
}
/*
* svm_region_exit
* There is no clean way to unlink the
- * root region when all clients go away,
+ * root region when all clients go away,
* so remove the pid entry and call it a day.
- */
-void svm_region_exit ()
+ */
+void
+svm_region_exit ()
{
- void *oldheap;
- int i, mypid = getpid();
- uword virtual_base, virtual_size;
-
- /* It felt so nice we did it twice... */
- if (root_rp == 0)
- return;
-
- if (--root_rp_refcount > 0)
- return;
-
- /*
- * If we take a signal while holding one or more shared-memory
- * mutexes, we may end up back here from an otherwise
- * benign exit handler. Bail out to avoid a recursive
- * mutex screw-up.
- */
- if (nheld)
- return;
-
- region_lock(root_rp, 7);
- oldheap = svm_push_pvt_heap (root_rp);
-
- virtual_base = root_rp->virtual_base;
- virtual_size = root_rp->virtual_size;
-
- for (i = 0; i < vec_len(root_rp->client_pids); i++) {
- if (root_rp->client_pids[i] == mypid) {
- vec_delete (root_rp->client_pids, 1, i);
- goto found;
- }
+ void *oldheap;
+ int i, mypid = getpid ();
+ uword virtual_base, virtual_size;
+
+ /* It felt so nice we did it twice... */
+ if (root_rp == 0)
+ return;
+
+ if (--root_rp_refcount > 0)
+ return;
+
+ /*
+ * If we take a signal while holding one or more shared-memory
+ * mutexes, we may end up back here from an otherwise
+ * benign exit handler. Bail out to avoid a recursive
+ * mutex screw-up.
+ */
+ if (nheld)
+ return;
+
+ region_lock (root_rp, 7);
+ oldheap = svm_push_pvt_heap (root_rp);
+
+ virtual_base = root_rp->virtual_base;
+ virtual_size = root_rp->virtual_size;
+
+ for (i = 0; i < vec_len (root_rp->client_pids); i++)
+ {
+ if (root_rp->client_pids[i] == mypid)
+ {
+ vec_delete (root_rp->client_pids, 1, i);
+ goto found;
+ }
}
- clib_warning("pid %d AWOL", mypid);
+ clib_warning ("pid %d AWOL", mypid);
- found:
+found:
- region_unlock(root_rp);
- svm_pop_heap (oldheap);
+ region_unlock (root_rp);
+ svm_pop_heap (oldheap);
- root_rp = 0;
- munmap ((void *)virtual_base, virtual_size);
+ root_rp = 0;
+ munmap ((void *) virtual_base, virtual_size);
}
-void svm_client_scan_this_region_nolock (svm_region_t *rp)
+void
+svm_client_scan_this_region_nolock (svm_region_t * rp)
{
- int j;
- int mypid = getpid();
- void *oldheap;
-
- for (j = 0; j < vec_len(rp->client_pids); j++) {
- if (mypid == rp->client_pids[j])
- continue;
- if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0)) {
- clib_warning ("%s: cleanup ghost pid %d",
- rp->region_name, rp->client_pids[j]);
- /* nb: client vec in rp->region_heap */
- oldheap = svm_push_pvt_heap (rp);
- vec_delete (rp->client_pids, 1, j);
- j--;
- svm_pop_heap (oldheap);
- }
+ int j;
+ int mypid = getpid ();
+ void *oldheap;
+
+ for (j = 0; j < vec_len (rp->client_pids); j++)
+ {
+ if (mypid == rp->client_pids[j])
+ continue;
+ if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0))
+ {
+ clib_warning ("%s: cleanup ghost pid %d",
+ rp->region_name, rp->client_pids[j]);
+ /* nb: client vec in rp->region_heap */
+ oldheap = svm_push_pvt_heap (rp);
+ vec_delete (rp->client_pids, 1, j);
+ j--;
+ svm_pop_heap (oldheap);
+ }
}
}
-/*
+/*
* Scan svm regions for dead clients
*/
-void svm_client_scan(char *root_path)
+void
+svm_client_scan (char *root_path)
{
- int i, j;
- svm_main_region_t *mp;
- svm_map_region_args_t *a = 0;
- svm_region_t *root_rp;
- svm_region_t *rp;
- svm_subregion_t *subp;
- u8 *name=0;
- u8 ** svm_names=0;
- void *oldheap;
- int mypid = getpid();
-
- vec_validate (a, 0);
-
- svm_region_init_chroot(root_path);
-
- root_rp = svm_get_root_rp();
-
- pthread_mutex_lock (&root_rp->mutex);
-
- mp = root_rp->data_base;
-
- for (j = 0; j < vec_len (root_rp->client_pids); j++) {
- if (mypid == root_rp->client_pids[j])
- continue;
- if (root_rp->client_pids[j]
- && (kill (root_rp->client_pids[j], 0) < 0)) {
- clib_warning ("%s: cleanup ghost pid %d",
- root_rp->region_name, root_rp->client_pids[j]);
- /* nb: client vec in root_rp->region_heap */
- oldheap = svm_push_pvt_heap (root_rp);
- vec_delete (root_rp->client_pids, 1, j);
- j--;
- svm_pop_heap (oldheap);
- }
+ int i, j;
+ svm_main_region_t *mp;
+ svm_map_region_args_t *a = 0;
+ svm_region_t *root_rp;
+ svm_region_t *rp;
+ svm_subregion_t *subp;
+ u8 *name = 0;
+ u8 **svm_names = 0;
+ void *oldheap;
+ int mypid = getpid ();
+
+ vec_validate (a, 0);
+
+ svm_region_init_chroot (root_path);
+
+ root_rp = svm_get_root_rp ();
+
+ pthread_mutex_lock (&root_rp->mutex);
+
+ mp = root_rp->data_base;
+
+ for (j = 0; j < vec_len (root_rp->client_pids); j++)
+ {
+ if (mypid == root_rp->client_pids[j])
+ continue;
+ if (root_rp->client_pids[j] && (kill (root_rp->client_pids[j], 0) < 0))
+ {
+ clib_warning ("%s: cleanup ghost pid %d",
+ root_rp->region_name, root_rp->client_pids[j]);
+ /* nb: client vec in root_rp->region_heap */
+ oldheap = svm_push_pvt_heap (root_rp);
+ vec_delete (root_rp->client_pids, 1, j);
+ j--;
+ svm_pop_heap (oldheap);
+ }
}
- /*
- * Snapshoot names, can't hold root rp mutex across
- * find_or_create.
- */
- pool_foreach (subp, mp->subregions, ({
- name = vec_dup (subp->subregion_name);
- vec_add1(svm_names, name);
- }));
-
- pthread_mutex_unlock (&root_rp->mutex);
-
- for (i = 0; i < vec_len(svm_names); i++) {
- vec_validate(a, 0);
- a->root_path = root_path;
- a->name = (char *) svm_names[i];
- rp = svm_region_find_or_create (a);
- if (rp) {
- pthread_mutex_lock (&rp->mutex);
-
- svm_client_scan_this_region_nolock (rp);
-
- pthread_mutex_unlock (&rp->mutex);
- svm_region_unmap (rp);
- vec_free(svm_names[i]);
- }
- vec_free (a);
+ /*
+ * Snapshoot names, can't hold root rp mutex across
+ * find_or_create.
+ */
+ /* *INDENT-OFF* */
+ pool_foreach (subp, mp->subregions, ({
+ name = vec_dup (subp->subregion_name);
+ vec_add1(svm_names, name);
+ }));
+ /* *INDENT-ON* */
+
+ pthread_mutex_unlock (&root_rp->mutex);
+
+ for (i = 0; i < vec_len (svm_names); i++)
+ {
+ vec_validate (a, 0);
+ a->root_path = root_path;
+ a->name = (char *) svm_names[i];
+ rp = svm_region_find_or_create (a);
+ if (rp)
+ {
+ pthread_mutex_lock (&rp->mutex);
+
+ svm_client_scan_this_region_nolock (rp);
+
+ pthread_mutex_unlock (&rp->mutex);
+ svm_region_unmap (rp);
+ vec_free (svm_names[i]);
+ }
+ vec_free (a);
}
- vec_free(svm_names);
+ vec_free (svm_names);
- svm_region_exit ();
+ svm_region_exit ();
- vec_free (a);
+ vec_free (a);
}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff