Date: Wed, 25 Jun 1997 12:07:45 -0700 (PDT) From: Tor Egge <tegge@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/scsi scsi_driver.c scsi_driver.h scsiconf.h sd.c Message-ID: <199706251907.MAA26570@freefall.freebsd.org>
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tegge 1997/06/25 12:07:45 PDT
Modified files:
sys/scsi scsi_driver.c scsi_driver.h scsiconf.h
sd.c
Log:
Introduce an advisory exclusive lock on the scsi link structure.
Change sd_open, sd_close and sd_ioctl to use this lock to ensure
serialization of some critical operations, thus avoiding some
race conditions. Ideas picked from NetBSD (ccd and sd devices).
This fixes one of the problems noted in PR kern/3688.
Reviewed by: "Justin T. Gibbs" <gibbs@plutotech.com>
Revision Changes Path
1.24 +23 -1 src/sys/scsi/scsi_driver.c
1.12 +3 -1 src/sys/scsi/scsi_driver.h
1.55 +3 -1 src/sys/scsi/scsiconf.h
1.106 +18 -1 src/sys/scsi/sd.c
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