[PATCH -mm 6/9] unshare system call : allow unsharing of fs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[PATCH -mm 6/9] unshare system call: allow unsharing of fs

 fork.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
 
 
diff -Naurp 2.6.15-rc5-mm2+patch/kernel/fork.c 2.6.15-rc5-mm2+patch6/kernel/fork.c
--- 2.6.15-rc5-mm2+patch/kernel/fork.c	2005-12-12 19:31:48.000000000 +0000
+++ 2.6.15-rc5-mm2+patch6/kernel/fork.c	2005-12-12 21:12:36.000000000 +0000
@@ -1378,15 +1378,19 @@ static int unshare_thread(unsigned long 
 }
 
 /*
- * Unsharing of fs info for tasks created with CLONE_FS is not supported yet
+ * Unshare the filesystem structure if it is being shared
  */
 static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)
 {
-	struct fs_struct *fs = current->fs;
+	struct fs_struct *fs = current->fs, *new_fs;
 
 	if ((unshare_flags & CLONE_FS) &&
-	    (fs && atomic_read(&fs->count) > 1))
-		return -EINVAL;
+	    (fs && atomic_read(&fs->count) > 1)) {
+		new_fs = __copy_fs_struct(current->fs);
+		if (!new_fs)
+			return -ENOMEM;
+		*new_fsp = new_fs;
+	}
 
 	return 0;
 }


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux