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;
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 28a2d80..bff4f2b 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -423,7 +423,7 @@
goto out;
}
- new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
+ new_value = bond_parse_parm(buf, bond_mode_tbl);
if (new_value < 0) {
printk(KERN_ERR DRV_NAME
": %s: Ignoring invalid mode value %.*s.\n",
@@ -478,7 +478,7 @@
goto out;
}
- new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
+ new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
if (new_value < 0) {
printk(KERN_ERR DRV_NAME
": %s: Ignoring invalid xmit hash policy value %.*s.\n",
@@ -518,7 +518,7 @@
int new_value;
struct bonding *bond = to_bond(d);
- new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
+ new_value = bond_parse_parm(buf, arp_validate_tbl);
if (new_value < 0) {
printk(KERN_ERR DRV_NAME
": %s: Ignoring invalid arp_validate value %s\n",
@@ -941,7 +941,7 @@
goto out;
}
- new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
+ new_value = bond_parse_parm(buf, bond_lacp_tbl);
if ((new_value == 1) || (new_value == 0)) {
bond->params.lacp_fast = new_value;
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index e1e4734..6d83be4 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -141,6 +141,8 @@
int mode;
};
+#define BOND_MAX_MODENAME_LEN 20
+
struct vlan_entry {
struct list_head vlan_list;
__be32 vlan_ip;
@@ -314,7 +316,7 @@
void bond_loadbalance_arp_mon(struct work_struct *);
void bond_activebackup_arp_mon(struct work_struct *);
void bond_set_mode_ops(struct bonding *bond, int mode);
-int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl);
+int bond_parse_parm(const char *mode_arg, struct bond_parm_tbl *tbl);
void bond_select_active_slave(struct bonding *bond);
void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
void bond_register_arp(struct bonding *);