More filesystems support?

[Dave Boone]

Hi,

If I wanted to get support for another filesystem type added, and I had the code changes necessary to do it, what should I do to go about getting the change incorporated into the default builds?

Thanks,
Dave

[Jan Kara]

Which filesystem do you have in mind? Generally, you just need to add the filesystem type to a function checking whether this filesystem supports quota. I can do that for you if the filesystem is reasonable enough ;).

[Dave Boone]

Hi Jan,

It's for EMC's Multi-Path File System (MPFS).  For the most part, it's exactly like NFS.  The only difference is that it will service read and write I/O requests directly over Fibre Channel or iSCSI.  All other requests get passed on to the NFS stack.  MPFS is currently a proprietary implementation of the IETF draft for block pNFS, proposed to be included in NFS 4.1.  http://www.emc.com/products/software/celerra_mpfs/

Here's the patch that seems to work for 3.14:

--- quotasys.c.orig     2007-07-16 06:31:02.000000000 -0400
+++ quotasys.c  2007-07-16 07:16:40.000000000 -0400
@@ -43,7 +43,7 @@
  */
int nfs_fstype(char *type)
{
-       return !strcmp(type, MNTTYPE_NFS) || !strcmp(type, MNTTYPE_NFS4);
+       return !strcmp(type, MNTTYPE_NFS) || !strcmp(type, MNTTYPE_NFS4) || !strcmp(type, MNTTYPE_MPFS);
}

/*
@@ -68,6 +68,7 @@
                    !strcmp(type, MNTTYPE_REISER) ||
                    !strcmp(type, MNTTYPE_XFS) ||
                    !strcmp(type, MNTTYPE_NFS) ||
+                   !strcmp(type, MNTTYPE_MPFS) ||
                    !strcmp(type, MNTTYPE_NFS4)) {
                        free(mtype);
                        return 1;
--- mntopt.h.orig       2007-07-16 06:25:27.000000000 -0400
+++ mntopt.h    2007-07-16 06:34:18.000000000 -0400
@@ -14,6 +14,7 @@
#define MNTTYPE_AUTOFS         "autofs"        /* Automount mountpoint */
#define MNTTYPE_JFS            "jfs"   /* JFS file system */
#define MNTTYPE_NFS4           "nfs4"  /* NFSv4 filesystem */
+#define MNTTYPE_MPFS           "mpfs"  /* EMC Celerra MPFS filesystem - uses NFS-style RPC quotas*/

/* mount options */
#define MNTOPT_NOQUOTA         "noquota"       /* don't enforce quota */

Sorry about the line wraps, if that happened in the post.  I could send you the patch files if you want.

I also have a patch that seems to work with 3.12 and existing RHEL4 systems, but since nfs_fstype() function, that patch is a little larger.  Could I upload it somewhere for you?

Thanks,
Dave

[Dave Boone]

Hi Jan,

I went ahead and posted the patch files to Tracker -> Patches.

Hope this helps.

Thanks,
Dave Boone

[Jan Kara]

OK, I've added the change to quota tools.