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authorDaniel Henrique Barboza <danielhb413@gmail.com>2018-06-27 14:24:31 -0300
committerPaolo Bonzini <pbonzini@redhat.com>2018-06-29 13:02:50 +0200
commita0c7e35b17b3d2cade8a5fc8e57904e02fb91fe4 (patch)
treef0dc2b6caa0729789ee72029191a34bd74069d15 /include
parent0a96ca2437646bad197b0108c5f4a93e7ead05a9 (diff)
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hw/scsi: centralize SG_IO calls into single function
For the VPD Block Limits emulation with SCSI passthrough, we'll issue an Inquiry request with EVPD set to retrieve the available VPD pages of the device. This would be done in a way similar of what scsi_generic_read_device_identification does: create a SCSI command and a reply buffer, fill in the sg_io_hdr_t structure, call blk_ioctl, check if an error occurred, process the response. This same process is done in other 2 functions, get_device_type and get_stream_blocksize. They differ in the command/reply buffer and post-processing, everything else is almost a copy/paste. Instead of adding a forth copy/pasted-ish code when adding the passthrough VPD BL emulation, this patch extirpates this repetition of those 3 functions and put it into a new one called scsi_SG_IO_FROM_DEV. Any future code that wants to execute an SG_DXFER_FROM_DEV to the device can use it, avoiding filling sg_io_hdr_t again and et cetera. Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Message-Id: <20180627172432.11120-3-danielhb413@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/hw/scsi/scsi.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index 138eb79..75eced3 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -187,6 +187,8 @@ void scsi_device_unit_attention_reported(SCSIDevice *dev);
void scsi_generic_read_device_identification(SCSIDevice *dev);
int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf);
+int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size,
+ uint8_t *buf, uint8_t buf_size);
SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
/* scsi-generic.c. */