On 6/18/19 7:43 PM, Elliott, Robert (Servers) wrote: > > >> -----Original Message----- >> From: linux-kernel-ow...@vger.kernel.org >> [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of Bart >> Van Assche >> Sent: Monday, June 17, 2019 10:28 PM >> To: dgilb...@interlog.com; Marc Gonzalez <marc.w.gonza...@free.fr>; James >> Bottomley >> <j...@linux.ibm.com>; Martin Petersen <martin.peter...@oracle.com> >> Cc: SCSI <linux-s...@vger.kernel.org>; LKML <linux-kernel@vger.kernel.org>; >> Christoph Hellwig >> <h...@lst.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', > > As mentioned, rescan-scsi-bus.sh is keeping references to /proc/scsi as a fall back only, as it's meant to work kernel independent. Per default it'll be using /sys, and will happily work without /proc/scsi.
So it's really only /proc/scsi/sg which carries some meaningful information; maybe we should move/copy it to somewhere else. I personally like getting rid of /proc/scsi. Cheers, -- Dr. Hannes Reinecke Teamlead Storage & Networking h...@suse.de +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 21284 (AG Nürnberg)
