From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sumit Agarwal Subject: Re: Executing a scsi command Date: Fri, 08 Nov 2002 11:49:35 -0600 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <3DCBF92F.776EDD64@india.hp.com> References: <3DCA6E46.91894890@patni.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------760BD982BC04487BC66CF328" Return-path: List-Id: linux-scsi@vger.kernel.org To: MShetty Cc: linux-scsi This is a multi-part message in MIME format. --------------760BD982BC04487BC66CF328 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit The best way to go about is to use the ioctl calls. In addition during the Initialization or Inquiry you can use IOCTL calls to associate the devices with your driver and then later on use them at your discretion using scsi_do_cmd etc. If you dont want to do this then an ugly way is as follows Most of the block devices have their arrays that can be used for this purpose as static. you have to employ different methods based on major number to tackle this. However, it is better if you try not to do this. for e.g for disks you need to hack sd.c to retrieve the value from rscsi_disks. for generic driver you can have your own inode and file pointer created the invoke sg_open() and get sfp pointer from filp->private and then use sfp->device for your purpose and so on. Does anyone else have a better alternative? Thanks, Sumit MShetty wrote: > > Hi, > > I want to execute a scsi cmd from my driver. The API's that I found > (scsi_do_cmd, scsi_wait_req) require a pointer to the scsi_device or > scsi_host structure.. Any idea how I could get them.... given the major > and minor no. of the device to which the command is to be sent. > > Is there an alternative way of executing a scsi_cmd ?? > > Would help if I could get some help on the above. > > Thanks and Regards, > M Shetty > > - > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --------------760BD982BC04487BC66CF328 Content-Type: text/x-vcard; charset=us-ascii; name="aksumit.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Sumit Agarwal Content-Disposition: attachment; filename="aksumit.vcf" begin:vcard n:Agarwal;Sumit tel;fax:(91)(80)2200196 tel;home:+919845205210 tel;work:2051126 x-mozilla-html:FALSE url:www.hp.com org:HP-ISO;HPUX version:2.1 email;internet:aksumit@india.hp.com title:Senior Software Engineer adr;quoted-printable:;;Hewlett-Packard,=0D=0AIndia Software Operation Pvt. Ltd.,=0D=0A29, Cunningham Road,=0D=0A;Bangalore;Karnataka;560052;India fn:Sumit Agarwal end:vcard --------------760BD982BC04487BC66CF328--