diff options
| author | Vu Pham <vu@mellanox.com> | 2006-06-17 20:37:31 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:31 -0700 |
| commit | 52fb2b50c4baa1430064c1e6c1c7df473d469df1 (patch) | |
| tree | 7d538c270d6b9064b5674a8fd6f7cf81d8b8580f | |
| parent | 0c5b395239cdea4db3d9c23a5738fdaf3b9ada4c (diff) | |
IB/srp: Allow cmd_per_lun to be set per target port
Allow userspace to throttle traffic on a given connection to a target
port by adding "max_cmd_per_lun=xyz" to lower the cmd_per_lun value
set for that scsi_host.
Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 46292561c44..8e6b1036971 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -1491,6 +1491,7 @@ enum { SRP_OPT_PKEY = 1 << 3, SRP_OPT_SERVICE_ID = 1 << 4, SRP_OPT_MAX_SECT = 1 << 5, + SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, SRP_OPT_ALL = (SRP_OPT_ID_EXT | SRP_OPT_IOC_GUID | SRP_OPT_DGID | @@ -1499,13 +1500,14 @@ enum { }; static match_table_t srp_opt_tokens = { - { SRP_OPT_ID_EXT, "id_ext=%s" }, - { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, - { SRP_OPT_DGID, "dgid=%s" }, - { SRP_OPT_PKEY, "pkey=%x" }, - { SRP_OPT_SERVICE_ID, "service_id=%s" }, - { SRP_OPT_MAX_SECT, "max_sect=%d" }, - { SRP_OPT_ERR, NULL } + { SRP_OPT_ID_EXT, "id_ext=%s" }, + { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, + { SRP_OPT_DGID, "dgid=%s" }, + { SRP_OPT_PKEY, "pkey=%x" }, + { SRP_OPT_SERVICE_ID, "service_id=%s" }, + { SRP_OPT_MAX_SECT, "max_sect=%d" }, + { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, + { SRP_OPT_ERR, NULL } }; static int srp_parse_options(const char *buf, struct srp_target_port *target) @@ -1581,6 +1583,14 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target) target->scsi_host->max_sectors = token; break; + case SRP_OPT_MAX_CMD_PER_LUN: + if (match_int(args, &token)) { + printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); + goto out; + } + target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); + break; + default: printk(KERN_WARNING PFX "unknown parameter or missing value " "'%s' in target creation request\n", p); |