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IB/iser: Protect iscsi_max_lun module param using callback 

Remove the check from the module_init function.

Link: https://lore.kernel.org/r/20210111145754.56727-3-mgurtovoy@nvidia.com
Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Max Gurtovoy 2021-01-11 14:57:52 +00:00 committed by Jason Gunthorpe
parent 5bf0e4b80b
commit 429c76133f
1 changed files with 20 additions and 7 deletions
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27
drivers/infiniband/ulp/iser/iscsi_iser.c
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@ -89,9 +89,15 @@ int iser_debug_level = 0;
module_param_named(debug_level, iser_debug_level, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)");
static int iscsi_iser_set(const char *val, const struct kernel_param *kp);
static const struct kernel_param_ops iscsi_iser_size_ops = {
.set = iscsi_iser_set,
.get = param_get_uint,
};
static unsigned int iscsi_max_lun = 512;
module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
MODULE_PARM_DESC(max_lun, "Max LUNs to allow per session (default:512");
module_param_cb(max_lun, &iscsi_iser_size_ops, &iscsi_max_lun, S_IRUGO);
MODULE_PARM_DESC(max_lun, "Max LUNs to allow per session, should > 0 (default:512)");
unsigned int iser_max_sectors = ISER_DEF_MAX_SECTORS;
module_param_named(max_sectors, iser_max_sectors, uint, S_IRUGO | S_IWUSR);
@ -110,6 +116,18 @@ int iser_pi_guard;
module_param_named(pi_guard, iser_pi_guard, int, S_IRUGO);
MODULE_PARM_DESC(pi_guard, "T10-PI guard_type [deprecated]");
static int iscsi_iser_set(const char *val, const struct kernel_param *kp)
{
int ret;
unsigned int n = 0;
ret = kstrtouint(val, 10, &n);
if (ret != 0 || n == 0)
return -EINVAL;
return param_set_uint(val, kp);
}
/*
* iscsi_iser_recv() - Process a successful recv completion
* @conn: iscsi connection
@ -1009,11 +1027,6 @@ static int __init iser_init(void)
iser_dbg("Starting iSER datamover...\n");
if (iscsi_max_lun < 1) {
iser_err("Invalid max_lun value of %u\n", iscsi_max_lun);
return -EINVAL;
}
memset(&ig, 0, sizeof(struct iser_global));
ig.desc_cache = kmem_cache_create("iser_descriptors",