[PATCH] knfsd: Fix up some bit-rot in exp_export

The nfsservctl system call isn't used but recent nfs-utils releases for
exporting filesystems, and consequently the code that is uses - exp_export -
has suffered some bitrot.

Particular:
  - some newly added fields in 'struct svc_export' are being initialised
    properly.
  - the return value is now always -ENOMEM ...

This patch fixes both these problems.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 1137d09..248dd92 100644 (file)
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -955,6 +955,8 @@ exp_export(struct nfsctl_export *nxp)
 
        exp = exp_get_by_name(clp, nd.mnt, nd.dentry, NULL);
 
+       memset(&new, 0, sizeof(new));
+
        /* must make sure there won't be an ex_fsid clash */
        if ((nxp->ex_flags & NFSEXP_FSID) &&
            (fsid_key = exp_get_fsid_key(clp, nxp->ex_dev)) &&
@@ -985,6 +987,9 @@ exp_export(struct nfsctl_export *nxp)
 
        new.h.expiry_time = NEVER;
        new.h.flags = 0;
+       new.ex_path = kstrdup(nxp->ex_path, GFP_KERNEL);
+       if (!new.ex_path)
+               goto finish;
        new.ex_client = clp;
        new.ex_mnt = nd.mnt;
        new.ex_dentry = nd.dentry;
@@ -1005,10 +1010,11 @@ exp_export(struct nfsctl_export *nxp)
                /* failed to create at least one index */
                exp_do_unexport(exp);
                cache_flush();
-               err = -ENOMEM;
-       }
-
+       } else
+               err = 0;
 finish:
+       if (new.ex_path)
+               kfree(new.ex_path);
        if (exp)
                exp_put(exp);
        if (fsid_key && !IS_ERR(fsid_key))