From 6e49949c5e9e04d64e16df3723dd3f5bd25a29e2 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Sun, 25 Apr 2010 07:03:57 -0500 Subject: [PATCH] [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: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/scsi_error.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index a5d630f5f519..c60cffbefa3c 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -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 -- 2.34.1