Hi Chris, very good explanation. Can you also please tell where does scsi-mq (multi-queue) comes into play in this flow? Where exactly one can see multi-queue in the code?
Thanks ! On Thursday, June 2, 2016 at 12:27:32 AM UTC+2, Chris Leech wrote: > > On Fri, May 20, 2016 at 06:33:25PM -0500, hao wen wrote: > > Hi Chris, > > > > Thank you for you reply. > > Just to be specific, can I get the scsi commands and try to do some > process > > on it in function like iscsi_data_xmit*(struct* iscsi_conn ***conn*) > *before > > the scsi commands are finally transmitted to the iscsi target? > > Look at the .queuecommand field in the scsi_host_template used by your > driver, it will point to the top level function that takes commands from > the SCSI midlayer to send to the target. > > For iscsi_tcp, that's iscsi_queuecommand. You can follow the calls down > from there, but that's the interface where SCSI transports take > commands. > > - Chris > > > 2016-05-20 18:18 GMT-05:00 Chris Leech <cle...@redhat.com <javascript:>>: > > > > > > On Mon, May 09, 2016 at 08:32:54AM -0700, whls...@gmail.com > <javascript:> wrote: > > > > Hi, > > > > > > > > I am recently looking into the process of iSCSI initiator. I wonder > where > > > > the source codes are that receive the scsi commands and encapsulate > them > > > > into iscsi format. I have walked through the interaction between > iscsiadm > > > > and iscsid, but I did find that. I thought it may be written in > qtask > > > > structure, but it seems the payload_len is never set within the > code. > > > > > > > > Could anyone help answer this question? > > > > > > The userspace tools only handle iSCSI session management tasks. The > > > SCSI command handling is done in the Linux kernel drivers, which > > > interact with the kernel SCSI subsystem. > > > > > > - Chris > > > > > > > -- > > You received this message because you are subscribed to the Google > Groups "open-iscsi" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to open-...@googlegroups.com <javascript:>. > > To post to this group, send email to open-...@googlegroups.com > <javascript:>. > > Visit this group at https://groups.google.com/group/open-iscsi. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/open-iscsi/a3b2b411-3138-43e4-aeaa-be026c70a95d%40googlegroups.com.
