Filesystems created with block size > page size will not work until that
support is added to the kernel. Filesystems with block size > 4k (lowest
page size supported in Linux) will not work on all systems. This patch
adds a check and a warning in those conditions, informing the user of the
caveats of using a larger block size. It can be overridden with -f.
Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
---
mkreiserfs/mkreiserfs.c | 3 +++
reiserfscore/reiserfslib.c | 18 ++++++++++++++++++
2 files changed, 21 insertions(+)
--- a/mkreiserfs/mkreiserfs.c 2008-01-24 13:38:26.000000000 -0500
+++ b/mkreiserfs/mkreiserfs.c 2008-01-24 13:39:03.000000000 -0500
@@ -686,6 +686,9 @@ int main (int argc, char **argv)
if (!(mode & QUIET_MODE) && !can_we_format_it (device_name, force))
return 1;
+
+ if (!(mode & QUIET_MODE) && !block_size_ok (Block_size, force))
+ return 1;
if (jdevice_name)
if (!(mode & QUIET_MODE) && !can_we_format_it (jdevice_name, force))
--- a/reiserfscore/reiserfslib.c 2004-10-04 16:39:35.000000000 -0400
+++ b/reiserfscore/reiserfslib.c 2008-01-24 13:39:03.000000000 -0500
@@ -1175,6 +1175,24 @@ void make_sure_root_dir_exists (reiserfs
&parent_root_dir_key, ih_flags);
}
+int block_size_ok (int blocksize, int force)
+{
+ int pagesize = getpagesize();
+ if (blocksize > 4096) {
+ reiserfs_warning (stderr, "Block sizes larger than 4k are not "
+ "supported on all architectures.\n");
+ if (blocksize > pagesize)
+ reiserfs_warning (stderr, "The newly created filesystem will not "
+ "be mountable on this system.\n");
+ else
+ reiserfs_warning (stderr, "The newly created filesystem may not "
+ "be mountable on other systems.\n");
+ check_forcing_ask_confirmation (force);
+ }
+
+ return 1;
+}
+
/* we only can use a file for filesystem or journal if it is either not
mounted block device or regular file and we are forced to use it */
-
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