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Commit 6e49949c authored by Mike Christie's avatar Mike Christie Committed by James Bottomley
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[SCSI] Log msg when getting Unit Attention 



If the user accidentally changes LUN mappings or it occurs
due to a bug, then it can cause data corruption that can take
months and months to track down. This patch adds a log
message when getting REPORT_LUNS_DATA_CHANGED and it adds
a generic message for other Unit Attentions with asc == 0x3f.

We are working on adding support for handling of these errors,
but I think until then we should at least log a message so
tracking down problems as a result of one of these changes
is a little easier.

Signed-off-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 3e84beba

drivers/scsi/scsi_error.c

+13 −0
Original line number Diff line number Diff line
@@ -307,6 +307,19 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) 
		    (sshdr.asc == 0x04) && (sshdr.ascq == 0x02))

			return FAILED;



		if (sshdr.asc == 0x3f && sshdr.ascq == 0x0e)

			scmd_printk(KERN_WARNING, scmd,

				    "Warning! Received an indication that the "

				    "LUN assignments on this target have "

				    "changed. The Linux SCSI layer does not "

				    "automatically remap LUN assignments.\n");

		else if (sshdr.asc == 0x3f)

			scmd_printk(KERN_WARNING, scmd,

				    "Warning! Received an indication that the "

				    "operating parameters on this target have "

				    "changed. The Linux SCSI layer does not "

				    "automatically adjust these parameters.\n");



		if (blk_barrier_rq(scmd->request))

			/*

			 * barrier requests should always retry on UA