NFSD: Adds macro EX_UUID_LEN for exports uuid's length

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

3 files changed, 6 insertions, 4 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 8771f417efa6..90d37b6ef163 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -487,10 +487,10 @@ uuid_parse(char **mesg, char *buf, unsigned char **puuid)
 
         /* expect a 16 byte uuid encoded as \xXXXX... */
         len = qword_get(mesg, buf, PAGE_SIZE);
-        if (len != 16)
+        if (len != EX_UUID_LEN)
                 return -EINVAL;
 
-        *puuid = kmemdup(buf, 16, GFP_KERNEL);
+        *puuid = kmemdup(buf, EX_UUID_LEN, GFP_KERNEL);
         if (*puuid == NULL)
                 return -ENOMEM;
 
@@ -663,7 +663,7 @@ static int svc_export_show(struct seq_file *m,
                 if (exp->ex_uuid) {
                         int i;
                         seq_puts(m, ",uuid=");
-                        for (i=0; i<16; i++) {
+                        for (i = 0; i < EX_UUID_LEN; i++) {
                                 if ((i&3) == 0 && i)
                                         seq_putc(m, ':');
                                 seq_printf(m, "%02x", exp->ex_uuid[i]);
diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h
index d7939a62a0ae..c7d4ed05e470 100644
--- a/fs/nfsd/export.h
+++ b/fs/nfsd/export.h
@@ -37,6 +37,7 @@ struct nfsd4_fs_locations {
  * spkm3i, and spkm3p (and using all 8 at once should be rare).
  */
 #define MAX_SECINFO_LIST        8
+#define EX_UUID_LEN             16
 
 struct exp_flavor_info {
         u32     pseudoflavor;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 470fe8998c9b..70d147244891 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2223,7 +2223,8 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
                         *p++ = cpu_to_be32(MINOR(stat.dev));
                         break;
                 case FSIDSOURCE_UUID:
-                        p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 16);
+                        p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
+                                                                EX_UUID_LEN);
                         break;
                 }
         }