Date: Sat, 7 Apr 2007 19:40:58 +0000 (UTC) From: Scott Long <scottl@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/cam/scsi scsi_sg.c scsi_sg.h src/sys/modules/cam Makefile src/sys/conf NOTES files src/sys/compat/linux linux_ioctl.c linux_ioctl.h Message-ID: <200704071940.l37Jew2t013708@repoman.freebsd.org>
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scottl 2007-04-07 19:40:58 UTC
FreeBSD src repository
Modified files:
sys/modules/cam Makefile
sys/conf files NOTES
sys/compat/linux linux_ioctl.c linux_ioctl.h
Added files:
sys/cam/scsi scsi_sg.c scsi_sg.h
Log:
Add the CAM 'SG' peripheral device. This device implements a subset of the
Linux SCSI SG passthrough device API. The intention is to allow for both
running of Linux apps that want to talk to /dev/sg* nodes, and to facilitate
porting of apps from Linux to FreeBSD. As such, both native and linuxolator
entry points and definitions are provided.
Caveats:
- This does not support the procfs and sysfs nodes that the Linux SG
driver provides. Some Linux apps may rely on these for operation,
others may only use them for informational purposes.
- More ioctls need to be implemented.
- Linux uses a naming scheme of "sg[a-z]" for devices, while FreeBSD uses a
scheme of "sg[0-9]". Devfs aliasis (symlinks) are automatically created
to link the two together. However, tools like camcontrol only see the
native names.
- Some operations were originally designed to return byte counts or other
data directly as the syscall return value. The linuxolator doesn't appear
to support this well, so this driver just punts for these cases.
Now that the driver is in place, others are welcome to add missing
functionality. Thanks to Roman Divacky for pushing this work along.
Revision Changes Path
1.1 +987 -0 src/sys/cam/scsi/scsi_sg.c (new)
1.1 +139 -0 src/sys/cam/scsi/scsi_sg.h (new)
1.138 +27 -0 src/sys/compat/linux/linux_ioctl.c
1.25 +34 -0 src/sys/compat/linux/linux_ioctl.h
1.1419 +5 -0 src/sys/conf/NOTES
1.1191 +1 -0 src/sys/conf/files
1.15 +1 -0 src/sys/modules/cam/Makefile
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