CVS log for src/sys/dev/iscsi/iscsi_utils.c

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Default branch: MAIN

Pull up following revision(s) (requested by mlelstv in ticket #505):

	sys/dev/iscsi/iscsi_utils.c: revision 1.29
	sys/dev/iscsi/iscsi.h: revision 1.5
	sys/dev/iscsi/iscsi_ioctl.c: revision 1.34
	sys/dev/iscsi/iscsi_globals.h: revision 1.28
	sys/dev/iscsi/iscsi_text.c: revision 1.14
	sys/dev/iscsi/iscsi_send.c: revision 1.40

Adapt to bignum representation of target.

Fix negotiation for mutual authentication.

Prepare for more CHAP types.

Fix crashes for invalid socket descriptors passed to kernel.

Protect usecount with connection mutex, avoids race on connection close.

Minor cosmetics.

Adapt to bignum representation of target.
Fix negotiation for mutual authentication.
Prepare for more CHAP types.
Fix crashes for invalid socket descriptors passed to kernel.
Protect usecount with connection mutex, avoids race on connection close.
Minor cosmetics.

kill_session now uses the session id to avoid stale session pointers.
protect network socket with rwlock to handle recconnects.
always take over socket from iscsid to prevent leaks.
keep a good connection alive.
don't forget child device when config_detach fails.
fix locking when reassigning CCBs.
pducount is protected by lock, no need for atomic.
some code rework, refined debug messages.

Sync with HEAD

wether -> whether

Fix typo in comment (s/numer/number/).

fix FALLTRHOUGH spell-o.

- add a prefix to struct members (but not the ioctl ones because they affect
  the API)
- use consistent variable names.

update from HEAD

Sync with HEAD

Sync with HEAD

Sync with HEAD

Sync with HEAD

Destroy callouts when cleaning up.

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Lock correctly around CV calls.
Fix handling of session termination.
Enable MPSAFE processing for scsipi.

Sync with HEAD

Remove throttling code, instead signal scsipi layer to reduce the openings
and retry the command. Start with a small openings number and let scsipi
request to grow it up to the current send window.

Adjust ccb and pdu counts to avoid ressource shortages. These are still
very ad-hoc numbers, but seem to be sufficient for a Gigabit link.

Use separate condvar for PDU pool and add counter to help debugging.

Revert setting PDU disposition to UNUSED before freeing. free_pdu
uses this as a flag to detect already returned PDUs.

Add reference counter for open commands to defer unmapping a session
that would lead to crashes in scsipi.

Move session cleanup to cleanup thread.

Use get_sernum to retrieve current serial number where possible and
make it check for immediate commands itself.

Adjust debug output.

drop unused debug helper routine

Handle freeing of PDU when referencing CCB is freed.

acquire session lock when changing throttling queue

initialize before check.

ensure that timeout counter is cleared when ccb is (re-)used.

Replace the simple tag counter with the command tag coming down from scsipi.
Also set attributes according to tag types.

Fix locking for pdu flags here, in particular PDUF_INQUEUE.

When stopping a callout, wait until the cleanup thread has processed them.

More debugging output, changed debug levels for some.

refactor callouts
remove timed out ccbs and connections from cleanup queue when stopping timeout.

factor out sernum handling.
make incrementing sernum atomic.
declare variables for atomic operations as volatile.

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.

Sync with HEAD

Save space by making ack flag booleans.

Remove ISCSI_PERFTEST.

Remove conditionals for NetBSD before 4.0.

resync with head

sync with head

- defer session cleanup to not force detachments
- use more and explicit locking
- improve connection recovery
- use larger timeouts
- handle ccb buffer underflow correctly
- simplify throttling code

Sessions can now temporarily exist without a valid
connection, you also need to update iscsid(8).

sync with head

Pull up revisions:
  src/sys/dev/iscsi/iscsi_globals.h revisions 1.3,1.4
  src/sys/dev/iscsi/iscsi_main.c revisions 1.4,1.5
  src/sys/dev/iscsi/iscsi_text.c revisions 1.4,1.5
  src/sys/dev/iscsi/iscsi_ioctl.c revisions 1.3,1.4
  src/sys/dev/iscsi/iscsi_send.c revisions 1.3,1.4,1.5
  src/sys/dev/iscsi/iscsi_utils.c revisions 1.2,1.3,1.4
  src/sbin/iscsid/iscsid_discover.c revision 1.4
  src/sys/dev/iscsi/iscsi_rcv.c revision 1.3
  src/sbin/iscsictl/iscsic_driverif.c revisions 1.5,1.6
(requested by martin in ticket #357, with updates from mhitch and mlelstv).

avoid namespace pollution when debugging
don't panic when printing data for a dead (NULL) connection

Close file descriptor passed into the kernel on success.
Fix locking of file handle. More cleanup on error paths.
Keep track of CCBs, so they cannot be used after a session ends.
Handle CCB timeouts even when the connection is terminated.
Compute firstdata, firstimmed correctly.

assemble_login_parameters() has a strange error reporting convention:
errors are positive numbers, so <= 0 is good, not >= ...
This makes CHAP authenticated iscsi logins work.

use first successful connection to a ISNS server

Add more debugging, fix filehandle usage, login negotiation and session
shutdown.
Add #ifdef'd code to send negotiation parameters in hex instead of base64,
so it works against older Linux targets.

report luns returns a 32bit list length.

Make digests work also on big endian machines.

it's really 32bit

Make digests work also on big endian machines.

Add more debugging, fix filehandle usage, login negotiation and session
shutdown.
Add #ifdef'd code to send negotiation parameters in hex instead of base64,
so it works against older Linux targets.

Close file descriptor passed into the kernel on success.
Fix locking of file handle. More cleanup on error paths.
Keep track of CCBs, so they cannot be used after a session ends.
Handle CCB timeouts even when the connection is terminated.
Compute firstdata, firstimmed correctly.

Start to move the in-kernel iSCSI initiator, kindly contributed to the
NetBSD Foundation by Wasabi Systems, from

        othersrc/external/bsd/iscsi/sys/dev/iscsi

to

        src/sys/dev/iscsi