nfsd: add get_uint for u32's

I don't think there's a practical difference for the range of values
these interfaces should see, but it would be safer to be unambiguous.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

2 files changed, 19 insertions, 3 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index ba233499b9a5..1114463bb856 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -398,7 +398,7 @@ fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
         int migrated, i, err;
 
         /* listsize */
-        err = get_int(mesg, &fsloc->locations_count);
+        err = get_uint(mesg, &fsloc->locations_count);
         if (err)
                 return err;
         if (fsloc->locations_count > MAX_FS_LOCATIONS)
@@ -456,7 +456,7 @@ static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
                 return -EINVAL;
 
         for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) {
-                err = get_int(mesg, &f->pseudoflavor);
+                err = get_uint(mesg, &f->pseudoflavor);
                 if (err)
                         return err;
                 /*
@@ -465,7 +465,7 @@ static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
                  * problem at export time instead of when a client fails
                  * to authenticate.
                  */
-                err = get_int(mesg, &f->flags);
+                err = get_uint(mesg, &f->flags);
                 if (err)
                         return err;
                 /* Only some flags are allowed to differ between flavors: */
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index af42596a82f9..f792794f6634 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -230,6 +230,22 @@ static inline int get_int(char **bpp, int *anint)
         return 0;
 }
 
+static inline int get_uint(char **bpp, unsigned int *anint)
+{
+        char buf[50];
+        int len = qword_get(bpp, buf, sizeof(buf));
+
+        if (len < 0)
+                return -EINVAL;
+        if (len == 0)
+                return -ENOENT;
+
+        if (kstrtouint(buf, 0, anint))
+                return -EINVAL;
+
+        return 0;
+}
+
 /*
  * timestamps kept in the cache are expressed in seconds
  * since boot.  This is the best for measuring differences in