bonding: Fix up parameter parsing
A recent change to add an additional hash policy modified
bond_parse_parm, but it now does not correctly match parameters passed in
via sysfs.
Rewrote bond_parse_parm to handle (a) parameter matches that
are substrings of one another and (b) user input with whitespace (e.g.,
sysfs input often has a trailing newline).
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 3ede0a2..379c5d8 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4540,18 +4540,27 @@
/*
* Convert string input module parms. Accept either the
- * number of the mode or its string name.
+ * number of the mode or its string name. A bit complicated because
+ * some mode names are substrings of other names, and calls from sysfs
+ * may have whitespace in the name (trailing newlines, for example).
*/
-int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
+int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
{
- int i;
+ int mode = -1, i, rv;
+ char modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
+
+ rv = sscanf(buf, "%d", &mode);
+ if (!rv) {
+ rv = sscanf(buf, "%20s", modestr);
+ if (!rv)
+ return -1;
+ }
for (i = 0; tbl[i].modename; i++) {
- if ((isdigit(*mode_arg) &&
- tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
- (strcmp(mode_arg, tbl[i].modename) == 0)) {
+ if (mode == tbl[i].mode)
return tbl[i].mode;
- }
+ if (strcmp(modestr, tbl[i].modename) == 0)
+ return tbl[i].mode;
}
return -1;