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Re: [Qemu-devel] [PATCH] qemu-pr-helper: miscellaneous fixes
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH] qemu-pr-helper: miscellaneous fixes |
Date: |
Fri, 1 Dec 2017 20:00:45 +0000 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
* Paolo Bonzini (address@hidden) wrote:
> 1) Return a generic sense if TEST UNIT READY does not provide one;
>
> 2) Fix two mistakes in copying from the spec.
>
> Reported-by: Dr. David Alan Gilbert <address@hidden>
> Signed-off-by: Paolo Bonzini <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
(Is there a separate fix to the scsi_target_send_command sense
comment?)
Dave
> ---
> include/scsi/utils.h | 6 +++++-
> scsi/qemu-pr-helper.c | 30 ++++++++++++++++++++++++++----
> scsi/utils.c | 10 ++++++++++
> 3 files changed, 41 insertions(+), 5 deletions(-)
>
> diff --git a/include/scsi/utils.h b/include/scsi/utils.h
> index 00a4bdb080..eb07e474ee 100644
> --- a/include/scsi/utils.h
> +++ b/include/scsi/utils.h
> @@ -76,7 +76,11 @@ extern const struct SCSISense sense_code_LUN_FAILURE;
> extern const struct SCSISense sense_code_LUN_COMM_FAILURE;
> /* Command aborted, Overlapped Commands Attempted */
> extern const struct SCSISense sense_code_OVERLAPPED_COMMANDS;
> -/* LUN not ready, Capacity data has changed */
> +/* Medium error, Unrecovered read error */
> +extern const struct SCSISense sense_code_READ_ERROR;
> +/* LUN not ready, Cause not reportable */
> +extern const struct SCSISense sense_code_NOT_READY;
> +/* Unit attention, Capacity data has changed */
> extern const struct SCSISense sense_code_CAPACITY_CHANGED;
> /* Unit attention, SCSI bus reset */
> extern const struct SCSISense sense_code_SCSI_BUS_RESET;
> diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
> index dd9785143b..9fe615c73c 100644
> --- a/scsi/qemu-pr-helper.c
> +++ b/scsi/qemu-pr-helper.c
> @@ -314,6 +314,22 @@ static int is_mpath(int fd)
> return !strncmp(tgt->target_type, "multipath", DM_MAX_TYPE_NAME);
> }
>
> +static SCSISense mpath_generic_sense(int r)
> +{
> + switch (r) {
> + case MPATH_PR_SENSE_NOT_READY:
> + return SENSE_CODE(NOT_READY);
> + case MPATH_PR_SENSE_MEDIUM_ERROR:
> + return SENSE_CODE(READ_ERROR);
> + case MPATH_PR_SENSE_HARDWARE_ERROR:
> + return SENSE_CODE(TARGET_FAILURE);
> + case MPATH_PR_SENSE_ABORTED_COMMAND:
> + return SENSE_CODE(IO_ERROR);
> + default:
> + abort();
> + }
> +}
> +
> static int mpath_reconstruct_sense(int fd, int r, uint8_t *sense)
> {
> switch (r) {
> @@ -329,7 +345,13 @@ static int mpath_reconstruct_sense(int fd, int r,
> uint8_t *sense)
> */
> uint8_t cdb[6] = { TEST_UNIT_READY };
> int sz = 0;
> - return do_sgio(fd, cdb, sense, NULL, &sz, SG_DXFER_NONE);
> + int r = do_sgio(fd, cdb, sense, NULL, &sz, SG_DXFER_NONE);
> +
> + if (r != GOOD) {
> + return r;
> + }
> + scsi_build_sense(sense, mpath_generic_sense(r));
> + return CHECK_CONDITION;
> }
>
> case MPATH_PR_SENSE_UNIT_ATTENTION:
> @@ -449,7 +471,7 @@ static int multipath_pr_out(int fd, const uint8_t *cdb,
> uint8_t *sense,
> memset(¶mp, 0, sizeof(paramp));
> memcpy(¶mp.key, ¶m[0], 8);
> memcpy(¶mp.sa_key, ¶m[8], 8);
> - paramp.sa_flags = param[10];
> + paramp.sa_flags = param[20];
> if (sz > PR_OUT_FIXED_PARAM_SIZE) {
> size_t transportid_len;
> int i, j;
> @@ -478,8 +500,8 @@ static int multipath_pr_out(int fd, const uint8_t *cdb,
> uint8_t *sense,
> j += offsetof(struct transportid, n_port_name[8]);
> i += 24;
> break;
> - case 3:
> - case 0x43:
> + case 5:
> + case 0x45:
> /* iSCSI transport. */
> len = lduw_be_p(¶m[i + 2]);
> if (len > 252 || (len & 3) || i + len + 4 > transportid_len)
> {
> diff --git a/scsi/utils.c b/scsi/utils.c
> index 5684951b12..e4182a9b09 100644
> --- a/scsi/utils.c
> +++ b/scsi/utils.c
> @@ -211,6 +211,16 @@ const struct SCSISense sense_code_LUN_COMM_FAILURE = {
> .key = ABORTED_COMMAND, .asc = 0x08, .ascq = 0x00
> };
>
> +/* Medium Error, Unrecovered read error */
> +const struct SCSISense sense_code_READ_ERROR = {
> + .key = MEDIUM_ERROR, .asc = 0x11, .ascq = 0x00
> +};
> +
> +/* Not ready, Cause not reportable */
> +const struct SCSISense sense_code_NOT_READY = {
> + .key = NOT_READY, .asc = 0x04, .ascq = 0x00
> +};
> +
> /* Unit attention, Capacity data has changed */
> const struct SCSISense sense_code_CAPACITY_CHANGED = {
> .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09
> --
> 2.14.3
>
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK