From: Hannes Reinecke Date: Tue, 18 Jan 2011 09:13:11 +0000 (+0100) Subject: [SCSI] Add detailed SCSI I/O errors X-Git-Tag: v2.6.39-rc1~440^2~129 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63583cca745f440167bf27877182dc13e19d4bcf;p=pandora-kernel.git [SCSI] Add detailed SCSI I/O errors Instead of just passing 'EIO' for any I/O error we should be notifying the upper layers with more details about the cause of this error. Update the possible I/O errors to: - ENOLINK: Link failure between host and target - EIO: Retryable I/O error - EREMOTEIO: Non-retryable I/O error - EBADE: I/O error restricted to the I_T_L nexus 'Retryable' in this context means that an I/O error _might_ be restricted to the I_T_L nexus (vulgo: path), so retrying on another nexus / path might succeed. 'Non-retryable' in general refers to a target failure, so this error will always be generated regardless of the I_T_L nexus it was send on. I/O errors restricted to the I_T_L nexus might be retried on another nexus / path, but they should _not_ be queued if no paths are available. Signed-off-by: Hannes Reinecke Signed-off-by: Mike Snitzer Signed-off-by: James Bottomley --- Reading git-diff-tree failed