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sbp2: log number of supported concurrent logins
Since this is useful information, promote it from a debug macro to a regular log message. The message appears only if the user set exclusive_login=0, therefore won't clutter the logs in normal use. Also update the comment on exclusive_login. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jody McIntyre <scjody@modernduck.com> Signed-off-by: Ben Collins <bcollins@ubuntu.com>
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@ -127,10 +127,12 @@ MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
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* talking to a single sbp2 device at the same time (filesystem coherency,
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* etc.). If you're running an sbp2 device that supports multiple logins,
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* and you're either running read-only filesystems or some sort of special
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* filesystem supporting multiple hosts (one such filesystem is OpenGFS,
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* see opengfs.sourceforge.net for more info), then set exclusive_login
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* to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
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* concurrent logins.
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* filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
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* File System, or Lustre, then set exclusive_login to zero.
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*
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* So far only bridges from Oxford Semiconductor are known to support
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* concurrent logins. Depending on firmware, four or two concurrent logins
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* are possible on OXFW911 and newer Oxsemi bridges.
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*/
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static int exclusive_login = 1;
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module_param(exclusive_login, int, 0644);
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@ -1214,13 +1216,11 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
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SBP2_DEBUG("length_max_logins = %x",
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(unsigned int)scsi_id->query_logins_response->length_max_logins);
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SBP2_DEBUG("Query logins to SBP-2 device successful");
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max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
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SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
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SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
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active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
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SBP2_DEBUG("Number of active logins: %d", active_logins);
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SBP2_INFO("Number of active logins: %d", active_logins);
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if (active_logins >= max_logins) {
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return -EIO;
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