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| author | Mike Christie <michaelc@cs.wisc.edu> | 2007-05-30 12:57:14 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2007-06-01 12:57:17 -0400 |
| commit | d473cc7f15f64ab8a90c3d7288ef30f46785d8d5 (patch) | |
| tree | bef7d5c01842430fcd93f6a235ad404d1de1f5a3 /drivers/scsi/libiscsi.c | |
| parent | 8ad5781ae9702a8f95cfdf30967752e4297613ee (diff) | |
| download | lwn-d473cc7f15f64ab8a90c3d7288ef30f46785d8d5.tar.gz lwn-d473cc7f15f64ab8a90c3d7288ef30f46785d8d5.zip | |
[SCSI] iscsi: Some fixes in preparation for bidirectional support - exp_datasn
This patch fixes handling of expected datasn/r2tsn as received from
target. It is done according to: T10 rfc3720 section 3.2.2.3. Data Sequencing.
. unify expected datasn/r2tsn into one counter
. calculate than check expected datasn/r2tsn. On error print a message
and fail the request. (TODO use iscsi retransmits)
. remove the FIXME ;)
. avoid zero length memset
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 5e6a42429c39..eb5113607958 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -120,7 +120,9 @@ static void iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) session->cmdsn++; hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); memcpy(hdr->cdb, sc->cmnd, sc->cmd_len); - memset(&hdr->cdb[sc->cmd_len], 0, MAX_COMMAND_SIZE - sc->cmd_len); + if (sc->cmd_len < MAX_COMMAND_SIZE) + memset(&hdr->cdb[sc->cmd_len], 0, + MAX_COMMAND_SIZE - sc->cmd_len); ctask->data_count = 0; if (sc->sc_data_direction == DMA_TO_DEVICE) { @@ -165,7 +167,6 @@ static void iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask) /* No unsolicit Data-Out's */ ctask->hdr->flags |= ISCSI_FLAG_CMD_FINAL; } else { - ctask->datasn = 0; hdr->flags |= ISCSI_FLAG_CMD_FINAL; zero_data(hdr->dlength); |