Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 0 insertions, 1237 deletions

diff --git a/svm/svm.c b/svm/svm.c
deleted file mode 100644
index e4ca98e1ed2..00000000000
--- a/svm/svm.c
+++ /dev/null
@@ -1,1237 +0,0 @@
-/*
- *------------------------------------------------------------------
- * svm.c - shared VM allocation, mmap(...MAP_FIXED...)
- * library
- *
- * 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.
- *------------------------------------------------------------------
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <netinet/in.h>
-#include <signal.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <time.h>
-#include <fcntl.h>
-#include <string.h>
-#include <vppinfra/clib.h>
-#include <vppinfra/vec.h>
-#include <vppinfra/hash.h>
-#include <vppinfra/bitmap.h>
-#include <vppinfra/fifo.h>
-#include <vppinfra/time.h>
-#include <vppinfra/mheap.h>
-#include <vppinfra/heap.h>
-#include <vppinfra/pool.h>
-#include <vppinfra/format.h>
-
-#include "svm.h"
-
-static svm_region_t *root_rp;
-static int root_rp_refcount;
-
-#define MAXLOCK 2
-static pthread_mutex_t *mutexes_held[MAXLOCK];
-static int nheld;
-
-svm_region_t *
-svm_get_root_rp (void)
-{
-  return root_rp;
-}
-
-#define MUTEX_DEBUG
-
-static void
-region_lock (svm_region_t * rp, int tag)
-{
-  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;
-}
-
-static void
-region_unlock (svm_region_t * rp)
-{
-  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;
-	}
-    }
-  ASSERT (0);
-
-found:
-  CLIB_MEMORY_BARRIER ();
-  pthread_mutex_unlock (&rp->mutex);
-}
-
-
-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);
-}
-
-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);
-    }
-  return (s);
-}
-
-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);
-    }
-
-  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);
-}
-
-/*
- * rnd_pagesize
- * Round to a pagesize multiple, presumably 4k works
- */
-static u64
-rnd_pagesize (u64 size)
-{
-  u64 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)
-{
-  int fd;
-  u8 junk = 0;
-  uword map_size;
-
-  map_size = rp->virtual_size - (MMAP_PAGESIZE +
-				 (a->pvt_heap_size ? a->pvt_heap_size :
-				  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;
-    }
-  return 0;
-}
-
-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
-     + (a->pvt_heap_size ? a->pvt_heap_size : 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
-		 +
-		 (a->pvt_heap_size ? a->pvt_heap_size : 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;
-}
-
-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);
-    }
-  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)
-{
-  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),
-				(a->pvt_heap_size != 0) ?
-				a->pvt_heap_size : 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 */  +
-	((a->pvt_heap_size != 0) ? a->pvt_heap_size : 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 */
-}
-
-static void
-svm_mutex_cleanup (void)
-{
-  int i;
-  for (i = 0; i < nheld; i++)
-    {
-      pthread_mutex_unlock (mutexes_held[i]);
-    }
-}
-
-static void
-svm_region_init_internal (svm_map_region_args_t * a)
-{
-  svm_region_t *rp;
-  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;
-
-  a->baseva += randomize_baseva;
-
-  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 = a->root_path ? format (0, "%s%c", a->root_path, 0) : 0;
-      rp->data_base = mp;
-      svm_pop_heap (oldheap);
-    }
-  region_unlock (rp);
-  root_rp = rp;
-}
-
-void
-svm_region_init (void)
-{
-  svm_map_region_args_t _a, *a = &_a;
-
-  memset (a, 0, sizeof (*a));
-  a->root_path = 0;
-  a->name = SVM_GLOBAL_REGION_NAME;
-  a->baseva = SVM_GLOBAL_REGION_BASEVA;
-  a->size = SVM_GLOBAL_REGION_SIZE;
-  a->flags = SVM_FLAGS_NODATA;
-  a->uid = 0;
-  a->gid = 0;
-
-  svm_region_init_internal (a);
-}
-
-void
-svm_region_init_chroot (char *root_path)
-{
-  svm_map_region_args_t _a, *a = &_a;
-
-  memset (a, 0, sizeof (*a));
-  a->root_path = root_path;
-  a->name = SVM_GLOBAL_REGION_NAME;
-  a->baseva = SVM_GLOBAL_REGION_BASEVA;
-  a->size = SVM_GLOBAL_REGION_SIZE;
-  a->flags = SVM_FLAGS_NODATA;
-  a->uid = 0;
-  a->gid = 0;
-
-  svm_region_init_internal (a);
-}
-
-void
-svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid)
-{
-  svm_map_region_args_t _a, *a = &_a;
-
-  memset (a, 0, sizeof (*a));
-  a->root_path = root_path;
-  a->name = SVM_GLOBAL_REGION_NAME;
-  a->baseva = SVM_GLOBAL_REGION_BASEVA;
-  a->size = SVM_GLOBAL_REGION_SIZE;
-  a->flags = SVM_FLAGS_NODATA;
-  a->uid = uid;
-  a->gid = gid;
-
-  svm_region_init_internal (a);
-}
-
-void
-svm_region_init_args (svm_map_region_args_t * a)
-{
-  svm_region_init_internal (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 +
-    ((a->pvt_heap_size != 0) ? a->pvt_heap_size : 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++;
-    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%llx (%lld)",
-		    root_rp->region_name, a->size, 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);
-#endif
-
-  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;
-
-  rp = svm_map_region (a);
-
-  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);
-
-  svm_pop_heap (oldheap);
-
-  region_unlock (root_rp);
-
-  return (rp);
-}
-
-/*
- * svm_region_unmap
- *
- * Let go of the indicated region. If the calling process
- * is the last customer, throw it away completely.
- * 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)
-{
-  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);
-
-found:
-
-  svm_pop_heap (oldheap);
-
-  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;
-
-      /* Kill the region, last guy on his way out */
-
-      oldheap = svm_push_pvt_heap (root_rp);
-      name = vec_dup (rp->region_name);
-
-      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;
-
-      nbits = (virtual_size + MMAP_PAGESIZE - 1) / MMAP_PAGESIZE;
-
-#if CLIB_DEBUG > 1
-      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;
-    }
-
-  region_unlock (rp);
-  region_unlock (root_rp);
-
-  munmap ((void *) virtual_base, virtual_size);
-}
-
-/*
- * svm_region_exit
- * There is no clean way to unlink the
- * root region when all clients go away,
- * so remove the pid entry and call it a day.
- */
-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;
-	}
-    }
-  clib_warning ("pid %d AWOL", mypid);
-
-found:
-
-  region_unlock (root_rp);
-  svm_pop_heap (oldheap);
-
-  root_rp = 0;
-  munmap ((void *) virtual_base, virtual_size);
-}
-
-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);
-	}
-    }
-}
-
-
-/*
- * Scan svm regions for dead clients
- */
-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);
-	}
-    }
-
-  /*
-   * 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);
-
-  svm_region_exit ();
-
-  vec_free (a);
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */