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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>
This commit is contained in:
Jay Vosburgh 2008-01-17 16:25:01 -08:00 committed by Jeff Garzik
parent 3b96c858fc
commit ece95f7fef
3 changed files with 23 additions and 12 deletions
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23
drivers/net/bonding/bond_main.c
View File

@ -4540,18 +4540,27 @@ static void bond_free_all(void)
/*
* 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;

8
drivers/net/bonding/bond_sysfs.c
View File

@ -423,7 +423,7 @@ static ssize_t bonding_store_mode(struct device *d,
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 @@ static ssize_t bonding_store_xmit_hash(struct device *d,
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 @@ static ssize_t bonding_store_arp_validate(struct device *d,
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 @@ static ssize_t bonding_store_lacp(struct device *d,
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;

4
drivers/net/bonding/bonding.h
View File

@ -141,6 +141,8 @@ struct bond_parm_tbl {
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_mii_monitor(struct work_struct *);
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 *);