X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fmkfs.c;h=07eefb2735cfd3865c2032c392d8f2cc83a05c91;hp=73fd860e8ef00356e11ccbd91d84cad4d7dfb4da;hb=91324e0a732fe592f2eecd5b541c731bf4f34b74;hpb=a61bccecfba1c9501910d28de24bac945e95001f

diff --git a/daemon/mkfs.c b/daemon/mkfs.c
index 73fd860..07eefb2 100644
--- a/daemon/mkfs.c
+++ b/daemon/mkfs.c
@@ -29,36 +29,106 @@
 #include "daemon.h"
 #include "actions.h"
 
+#define MAX_ARGS 16
+
+/* Takes optional arguments, consult optargs_bitmask. */
 int
-do_mkfs (const char *fstype, const char *device)
+do_mkfs_opts (const char *fstype, const char *device, int blocksize, const char *features)
 {
-  char *err;
+  const char *argv[MAX_ARGS];
+  size_t i = 0;
+  char blocksize_str[32];
   int r;
+  char *err;
 
-  r = command (NULL, &err, "/sbin/mkfs", "-t", fstype, device, NULL);
-  if (r == -1) {
-    reply_with_error ("mkfs: %s", err);
-    free (err);
-    return -1;
+  argv[i++] = "mkfs";
+  argv[i++] = "-t";
+  argv[i++] = fstype;
+
+  /* mkfs.ntfs requires the -Q argument otherwise it writes zeroes
+   * to every block and does bad block detection, neither of which
+   * are useful behaviour for virtual devices.
+   */
+  if (STREQ (fstype, "ntfs"))
+    argv[i++] = "-Q";
+
+  /* mkfs.reiserfs produces annoying interactive prompts unless you
+   * tell it to be quiet.
+   */
+  if (STREQ (fstype, "reiserfs"))
+    argv[i++] = "-f";
+
+  /* Same for JFS. */
+  if (STREQ (fstype, "jfs"))
+    argv[i++] = "-f";
+
+  /* For GFS, GFS2, assume a single node. */
+  if (STREQ (fstype, "gfs") || STREQ (fstype, "gfs2")) {
+    argv[i++] = "-p";
+    argv[i++] = "lock_nolock";
+    /* The man page says this is default, but it doesn't seem to be: */
+    argv[i++] = "-j";
+    argv[i++] = "1";
+    /* Don't ask questions: */
+    argv[i++] = "-O";
   }
 
-  free (err);
-  return 0;
-}
+  /* Process blocksize parameter if set. */
+  if (optargs_bitmask & GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK) {
+    if (blocksize <= 0 || !is_power_of_2 (blocksize)) {
+      reply_with_error ("block size must be > 0 and a power of 2");
+      return -1;
+    }
 
-int
-do_mkfs_b (const char *fstype, int blocksize, const char *device)
-{
-  char *err;
-  int r;
+    if (STREQ (fstype, "vfat") ||
+        STREQ (fstype, "msdos")) {
+      /* For VFAT map the blocksize into a cluster size.  However we
+       * have to determine the block device sector size in order to do
+       * this.
+       */
+      int sectorsize = do_blockdev_getss (device);
+      if (sectorsize == -1)
+        return -1;
+
+      int sectors_per_cluster = blocksize / sectorsize;
+      if (sectors_per_cluster < 1 || sectors_per_cluster > 128) {
+        reply_with_error ("unsupported cluster size for %s filesystem (requested cluster size = %d, sector size = %d, trying sectors per cluster = %d)",
+                          fstype, blocksize, sectorsize, sectors_per_cluster);
+        return -1;
+      }
 
-  char blocksize_s[32];
-  snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
+      snprintf (blocksize_str, sizeof blocksize_str, "%d", sectors_per_cluster);
+      argv[i++] = "-s";
+      argv[i++] = blocksize_str;
+    }
+    else if (STREQ (fstype, "ntfs")) {
+      /* For NTFS map the blocksize into a cluster size. */
+      snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
+      argv[i++] = "-c";
+      argv[i++] = blocksize_str;
+    }
+    else {
+      /* For all other filesystem types, try the -b option. */
+      snprintf (blocksize_str, sizeof blocksize_str, "%d", blocksize);
+      argv[i++] = "-b";
+      argv[i++] = blocksize_str;
+    }
+  }
+
+  if (optargs_bitmask & GUESTFS_MKFS_OPTS_FEATURES_BITMASK) {
+     argv[i++] = "-O";
+     argv[i++] = features;
+  }
 
-  r = command (NULL, &err,
-	       "/sbin/mkfs", "-t", fstype, "-b", blocksize_s, device, NULL);
+  argv[i++] = device;
+  argv[i++] = NULL;
+
+  if (i > MAX_ARGS)
+    abort ();
+
+  r = commandv (NULL, &err, argv);
   if (r == -1) {
-    reply_with_error ("mkfs_b: %s", err);
+    reply_with_error ("%s: %s: %s", fstype, device, err);
     free (err);
     return -1;
   }
@@ -66,3 +136,17 @@ do_mkfs_b (const char *fstype, int blocksize, const char *device)
   free (err);
   return 0;
 }
+
+int
+do_mkfs (const char *fstype, const char *device)
+{
+  optargs_bitmask = 0;
+  return do_mkfs_opts (fstype, device, 0, 0);
+}
+
+int
+do_mkfs_b (const char *fstype, int blocksize, const char *device)
+{
+  optargs_bitmask = GUESTFS_MKFS_OPTS_BLOCKSIZE_BITMASK;
+  return do_mkfs_opts (fstype, device, blocksize, 0);
+}