CVS commit: src/sys/dev/iscsi

["Michael van Elst" <mlelstv%netbsd.org@localhost>]

Module Name:    src
Committed By:   mlelstv
Date:           Sun May 29 13:51:16 UTC 2016

Modified Files:
        src/sys/dev/iscsi: iscsi_globals.h iscsi_ioctl.c iscsi_main.c
            iscsi_rcv.c iscsi_send.c iscsi_text.c iscsi_utils.c

Log Message:
Several improvements to the ISCSI driver.

- Enable debug messages but set log level to be quiet. Provide a
  system (hw.iscsi.debug) to set the log level at run time.
- Replace old tsleep/wakeup synchronization with mutexes and condvars.
- Defer actions from callouts (basically timeouts) to the cleanup thread.
- Protect lists and unique ids with mutexes. protect connection usecount
  by using atomic operations.
- Assert kernel lock when calling into scsipi and network code.
- Use this to make send/receive/cleanup threads MPSAFE.

- Fix handling of out-of-CCB/out-of-PDU conditions against the scsipi layer.
- Bump number of PDUs to 128 to avoid virtually all out-of-PDU conditions

- Make use of softc structure for attach/detach operations.
- Track open file handles to prevent detach when busy.

- Move some global variables to make them static.

- Fix 'Overlapping Commands Attempted' error by marking commands as
  simply ordered (ATTR_SIMPLE) like FreeBSD.


To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/dev/iscsi/iscsi_globals.h \
    src/sys/dev/iscsi/iscsi_ioctl.c
cvs rdiff -u -r1.17 -r1.18 src/sys/dev/iscsi/iscsi_main.c
cvs rdiff -u -r1.10 -r1.11 src/sys/dev/iscsi/iscsi_rcv.c
cvs rdiff -u -r1.15 -r1.16 src/sys/dev/iscsi/iscsi_send.c
cvs rdiff -u -r1.9 -r1.10 src/sys/dev/iscsi/iscsi_text.c
cvs rdiff -u -r1.8 -r1.9 src/sys/dev/iscsi/iscsi_utils.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.