X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=daemon%2Fext2.c;h=01a462871451d6d44a4c093811032c91bd59df74;hb=cbc6b720a4e58d32b6089db05288f4a468742b47;hp=7f9d2e02a0caea286871bf3823c81a4c35f7d414;hpb=da4812ab6b44c29cb3cf181c7aa896420ecb8aa6;p=libguestfs.git

diff --git a/daemon/ext2.c b/daemon/ext2.c
index 7f9d2e0..01a4628 100644
--- a/daemon/ext2.c
+++ b/daemon/ext2.c
@@ -24,11 +24,14 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "../src/guestfs_protocol.h"
+#include "guestfs_protocol.h"
 #include "daemon.h"
 #include "c-ctype.h"
 #include "actions.h"
 
+/* Confirmed this is true up to ext4 from the Linux sources. */
+#define EXT2_LABEL_MAX 16
+
 /* Choose which tools like mke2fs to use.  For RHEL 5 (only) there
  * is a special set of tools which support ext2/3/4.  eg. On RHEL 5,
  * mke2fs only supports ext2/3, but mke4fs supports ext2/3/4.
@@ -36,7 +39,7 @@
  * We specify e4fsprogs in the package list to ensure it is loaded
  * if it exists.
  */
-static int
+int
 e2prog (char *name)
 {
   char *p = strstr (name, "e2");
@@ -156,6 +159,12 @@ do_set_e2label (const char *device, const char *label)
   if (e2prog (prog) == -1)
     return -1;
 
+  if (strlen (label) > EXT2_LABEL_MAX) {
+    reply_with_error ("%s: ext2 labels are limited to %d bytes",
+                      label, EXT2_LABEL_MAX);
+    return -1;
+  }
+
   r = command (NULL, &err, prog, device, label, NULL);
   if (r == -1) {
     reply_with_error ("%s", err);
@@ -257,6 +266,27 @@ do_resize2fs_size (const char *device, int64_t size)
 }
 
 int
+do_resize2fs_M (const char *device)
+{
+  char *err;
+  int r;
+
+  char prog[] = "resize2fs";
+  if (e2prog (prog) == -1)
+    return -1;
+
+  r = command (NULL, &err, prog, "-M" , device, NULL);
+  if (r == -1) {
+    reply_with_error ("%s", err);
+    free (err);
+    return -1;
+  }
+
+  free (err);
+  return 0;
+}
+
+int
 do_e2fsck_f (const char *device)
 {
   char *err;
@@ -320,6 +350,12 @@ do_mke2journal_L (int blocksize, const char *label, const char *device)
   if (e2prog (prog) == -1)
     return -1;
 
+  if (strlen (label) > EXT2_LABEL_MAX) {
+    reply_with_error ("%s: ext2 labels are limited to %d bytes",
+                      label, EXT2_LABEL_MAX);
+    return -1;
+  }
+
   char blocksize_s[32];
   snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);
 
@@ -406,6 +442,12 @@ do_mke2fs_JL (const char *fstype, int blocksize, const char *device,
   if (e2prog (prog) == -1)
     return -1;
 
+  if (strlen (label) > EXT2_LABEL_MAX) {
+    reply_with_error ("%s: ext2 labels are limited to %d bytes",
+                      label, EXT2_LABEL_MAX);
+    return -1;
+  }
+
   char blocksize_s[32];
   snprintf (blocksize_s, sizeof blocksize_s, "%d", blocksize);