linux-kernel - RE: [PATCH v1] scsi: Don't select SCSI_PROC

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Date:   Tue, 18 Jun 2019 17:43:25 +0000
From:   "Elliott, Robert (Servers)" <elliott@....com>
To:     Bart Van Assche <bvanassche@....org>,
        "dgilbert@...erlog.com" <dgilbert@...erlog.com>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        "James Bottomley" <jejb@...ux.ibm.com>,
        Martin Petersen <martin.petersen@...cle.com>
CC:     SCSI <linux-scsi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: RE: [PATCH v1] scsi: Don't select SCSI_PROC_FS by default

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of Bart
> Van Assche
> Sent: Monday, June 17, 2019 10:28 PM
> To: dgilbert@...erlog.com; Marc Gonzalez <marc.w.gonzalez@...e.fr>; James Bottomley
> <jejb@...ux.ibm.com>; Martin Petersen <martin.petersen@...cle.com>
> Cc: SCSI <linux-scsi@...r.kernel.org>; LKML <linux-kernel@...r.kernel.org>; Christoph Hellwig
> <hch@....de>
> Subject: Re: [PATCH v1] scsi: Don't select SCSI_PROC_FS by default
> 
> On 6/17/19 5:35 PM, Douglas Gilbert wrote:
> > For sg3_utils:
> >
> > $ find . -name '*.c' -exec grep "/proc/scsi" {} \; -print
> > static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
> > ./src/sg_read.c
> > static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
> > ./src/sgp_dd.c
> > static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
> > ./src/sgm_dd.c
> > static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
> > ./src/sg_dd.c
> >                  "'echo 1 > /proc/scsi/sg/allow_dio'\n", q_len,
> > dirio_count);
> > ./testing/sg_tst_bidi.c
> > static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
> > ./examples/sgq_dd.c
> >
> > That is 6 (not 38) by my count.
> 
> Hi Doug,
> 
> This is the command I ran:
> 
> $ git grep /proc/scsi | wc -l
> 38
> 
> I think your query excludes scripts/rescan-scsi-bus.sh.
> 
> Bart.

Here's the full list to ensure the discussion doesn't overlook anything:

sg3_utils-1.44$ grep -R /proc/scsi .
./src/sg_read.c:static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
./src/sgp_dd.c:static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
./src/sgm_dd.c:static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
./src/sg_dd.c:static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
./scripts/rescan-scsi-bus.sh:# Return hosts. /proc/scsi/HOSTADAPTER/? must exist
./scripts/rescan-scsi-bus.sh:  for driverdir in /proc/scsi/*; do
./scripts/rescan-scsi-bus.sh:    driver=${driverdir#/proc/scsi/}
./scripts/rescan-scsi-bus.sh:      name=${hostdir#/proc/scsi/*/}
./scripts/rescan-scsi-bus.sh:# Get /proc/scsi/scsi info for device $host:$channel:$id:$lun
./scripts/rescan-scsi-bus.sh:    SCSISTR=$(grep -A "$LN" -e "$grepstr" /proc/scsi/scsi)
./scripts/rescan-scsi-bus.sh:    DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`
./scripts/rescan-scsi-bus.sh:      echo "scsi report-devs 1" >/proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:      DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`
./scripts/rescan-scsi-bus.sh:      echo "scsi report-devs 0" >/proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:# Outputs description from /proc/scsi/scsi (unless arg passed)
./scripts/rescan-scsi-bus.sh:        echo "scsi remove-single-device $devnr" > /proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:          echo "scsi add-single-device $devnr" > /proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:      echo "scsi add-single-device $devnr" > /proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:      echo "scsi add-single-device $devnr" > /proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:      echo "scsi add-single-device $host $channel $id $SCAN_WILD_CARD" > /proc/scsi/scsi
./scripts/rescan-scsi-bus.sh:if test ! -d /sys/class/scsi_host/ -a ! -d /proc/scsi/; then
./ChangeLog:    /proc/scsi/sg/allow_dio is '0'
./ChangeLog:  - change sg_debug to call system("cat /proc/scsi/sg/debug");
./suse/sg3_utils.changes:  * Support systems without /proc/scsi
./examples/sgq_dd.c:static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio";
./doc/sg_read.8:If direct IO is selected and /proc/scsi/sg/allow_dio
./doc/sg_read.8:"echo 1 > /proc/scsi/sg/allow_dio". An alternate way to avoid the
./doc/sg_map.8:observing the output of the command: "cat /proc/scsi/scsi".
./doc/sgp_dd.8:at completion. If direct IO is selected and /proc/scsi/sg/allow_dio
./doc/sgp_dd.8:this at completion. If direct IO is selected and /proc/scsi/sg/allow_dio
./doc/sgp_dd.8:mapping to SCSI block devices should be checked with 'cat /proc/scsi/scsi'
./doc/sg_dd.8:notes this at completion. If direct IO is selected and /proc/scsi/sg/allow_dio
./doc/sg_dd.8:this at completion. If direct IO is selected and /proc/scsi/sg/allow_dio
./doc/sg_dd.8:with 'echo 1 > /proc/scsi/sg/allow_dio'.
./doc/sg_dd.8:mapping to SCSI block devices should be checked with 'cat /proc/scsi/scsi',