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scsi-disk: pass sense correctly for guest-recoverable errors 

When an error was passed down to the guest because it was recoverable,
the sense length was not copied from the SG_IO data.  As a result,
the guest saw the CHECK CONDITION status but not the sense data.

Signed-off-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Shinichiro Kawasaki 2019-07-02 10:08:00 +02:00 committed by Paolo Bonzini
parent 46cd24e7ed
commit d31347f5ff
1 changed files with 10 additions and 0 deletions
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10
hw/scsi/scsi-disk.c
View File

@ -62,6 +62,7 @@ typedef struct SCSIDiskClass {
DMAIOFunc *dma_readv;
DMAIOFunc *dma_writev;
bool (*need_fua_emulation)(SCSICommand *cmd);
void (*update_sense)(SCSIRequest *r);
} SCSIDiskClass;
typedef struct SCSIDiskReq {
@ -438,6 +439,7 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
{
bool is_read = (r->req.cmd.mode == SCSI_XFER_FROM_DEV);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
BlockErrorAction action = blk_get_error_action(s->qdev.conf.blk,
is_read, error);
@ -456,6 +458,7 @@ static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
if (error == ECANCELED || error == EAGAIN || error == ENOTCONN ||
error == 0) {
/* These errors are handled by guest. */
sdc->update_sense(&r->req);
scsi_req_complete(&r->req, *r->status);
return true;
}
@ -2894,6 +2897,12 @@ static int scsi_block_parse_cdb(SCSIDevice *d, SCSICommand *cmd,
}
}
static void scsi_block_update_sense(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
SCSIBlockReq *br = DO_UPCAST(SCSIBlockReq, req, r);
r->req.sense_len = MIN(br->io_header.sb_len_wr, sizeof(r->req.sense));
}
#endif
static
@ -3059,6 +3068,7 @@ static void scsi_block_class_initfn(ObjectClass *klass, void *data)
sc->parse_cdb = scsi_block_parse_cdb;
sdc->dma_readv = scsi_block_dma_readv;
sdc->dma_writev = scsi_block_dma_writev;
sdc->update_sense = scsi_block_update_sense;
sdc->need_fua_emulation = scsi_block_no_fua;
dc->desc = "SCSI block device passthrough";
dc->props = scsi_block_properties;