[PATCH] knfsd: nfsd: store export path in export

Store the export path in the svc_export structure instead of storing only the
dentry.  This will prevent the need for additional d_path calls to provide
NFSv4 fs_locations support.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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 597b3cb..d3178de 100644 (file)
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -325,6 +325,7 @@ static void svc_export_put(struct kref *ref)
        dput(exp->ex_dentry);
        mntput(exp->ex_mnt);
        auth_domain_put(exp->ex_client);
+       kfree(exp->ex_path);
        kfree(exp);
 }
 
@@ -398,6 +399,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
        int an_int;
 
        nd.dentry = NULL;
+       exp.ex_path = NULL;
 
        if (mesg[mlen-1] != '\n')
                return -EINVAL;
@@ -428,6 +430,10 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
        exp.ex_client = dom;
        exp.ex_mnt = nd.mnt;
        exp.ex_dentry = nd.dentry;
+       exp.ex_path = kstrdup(buf, GFP_KERNEL);
+       err = -ENOMEM;
+       if (!exp.ex_path)
+               goto out;
 
        /* expiry */
        err = -EINVAL;
@@ -473,6 +479,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
        else
                exp_put(expp);
  out:
+       kfree(exp.ex_path);
        if (nd.dentry)
                path_release(&nd);
  out_no_path:
@@ -524,6 +531,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
        new->ex_client = item->ex_client;
        new->ex_dentry = dget(item->ex_dentry);
        new->ex_mnt = mntget(item->ex_mnt);
+       new->ex_path = NULL;
 }
 
 static void export_update(struct cache_head *cnew, struct cache_head *citem)
@@ -535,6 +543,8 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
        new->ex_anon_uid = item->ex_anon_uid;
        new->ex_anon_gid = item->ex_anon_gid;
        new->ex_fsid = item->ex_fsid;
+       new->ex_path = item->ex_path;
+       item->ex_path = NULL;
 }
 
 static struct cache_head *svc_export_alloc(void)

diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index d2a8abb..47d9668 100644 (file)
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -51,6 +51,7 @@ struct svc_export {
        int                     ex_flags;
        struct vfsmount *       ex_mnt;
        struct dentry *         ex_dentry;
+       char *                  ex_path;
        uid_t                   ex_anon_uid;
        gid_t                   ex_anon_gid;
        int                     ex_fsid;