Don't allow spaces in network device names because it makes
it difficult to provide text interfaces via sysfs.
Signed-off-by: Stephen Hemminger <[email protected]>
---
net/core/dev.c | 24 ++++++++++++++++++++----
1 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index d95e262..56c8afb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -79,6 +79,7 @@ #include <linux/capability.h>
#include <linux/cpu.h>
#include <linux/types.h>
#include <linux/kernel.h>
+#include <linux/ctype.h>
#include <linux/sched.h>
#include <linux/mutex.h>
#include <linux/string.h>
@@ -636,10 +637,25 @@ struct net_device * dev_get_by_flags(uns
*/
int dev_valid_name(const char *name)
{
- return !(*name == '\0'
- || !strcmp(name, ".")
- || !strcmp(name, "..")
- || strchr(name, '/'));
+ if (*name == '\0') /* null string */
+ return 0;
+
+ if (*name == '.') {
+ if (name[1] == '\0') /* can't have . in directory */
+ return 0;
+ if (name[1] == '.' && name[2] == '\0')
+ return 0; /* or .. */
+ }
+
+ /* Check for blanks and slash because it confuses sysfs interfaces */
+ do {
+ if (*name == '/')
+ return 0;
+ if (isspace(*name))
+ return 0;
+ } while (*++name);
+
+ return 1;
}
/**
--
1.4.0
-
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