Some SIMs report much less untagged device openings then tagged ones.
Target mode devices are not handled by regular probing routines, and so
there is nothing to increase queue size for them to the SIM's maximum.
To fix that resize the queue explicitly on ctl periph registration.
This radically improves performance of mpt(4) in target mode.
Also fetch and report device queue statistics in `ctladm dumpstructs`,
since regular way of `camcontrol tags` is not usable in target mode.
MFC after: 2 weeks
Queue statistics has nothing to do with presence or absence of INQUIRY
data, etc. Target mode devices are never configured, but have queues.
MFC after: 2 weeks
Some SIMs may not abort them implicitly, that either fail the LUN disable
request or just make us wait for those CCBs forever. With this change
I can successfully disable LUNs on mpt(4). For isp(4), which aborts them
implicitly, this change should be irrelevant.
MFC after: 2 weeks
Report UNMAP granularity as stripesize/-offset if we have no other values
to report there.
Add new quirk DA_Q_STRICT_UNMAP for cases when target is too critical to
misaligned UNMAP request, reporting errors instead of being suboptimal.
Setting this quirk makes da periph to forcefully align all UNMAP requests
to avoid those errors by the cost of some odd ranges not being UNMAP'ed.
This makes UNMAP usable within VMware 6.x VMs, just now 100% efficient.
MFC after: 2 weeks
For now it allows to unload CTL kernel module if there are no target-capable
SIMs in CAM. As next step full teardown of CAM targets can be implemented.
CAM_UNLOCKED is internal flag and cannot correctly be set by userland.
Return EINVAL from CAMIOCOMMAND and CAMIOQUEUE if it is set.
Also fix leaks in some of the error paths for CAMIOQUEUE.
PR: 215356
Reviewed by: ken, mav
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D9869
The biggest change is that ctl_remove_initiator() now generates I_T NEXUS
LOSS event, cleaning part of LUs state related to the initiator.
MFC after: 2 weeks
If we asked to send sense data by setting CAM_SEND_SENSE, but SIM didn't
confirm transmission by setting CAM_SENT_SENSE, assume it was not sent.
Queue the I/O back to CTL for later REQUEST SENSE with ctl_queue_sense().
This is needed for error reporting on SPI HBAs like ahc(4)/ahd(4).
MFC after: 2 weeks
This code was disabled due to its high memory usage. But now we need this
functionality for cfumass(4) frontend, since USB MS BBB transport does not
support autosense.
MFC after: 2 weeks
When LUN is disabled, SIM starts returning queued ATIOs/INOTs. But at the
same time there can be some ATIOs/INOTs still carrying real new requests.
If we free those, SIM may leak some resources, forever expecting for any
response from us. So try to be careful, separating ATIOs/INOTs carrying
requests which still must be processed, from ATIOs/INOTs completed with
errors which can be freed.
MFC after: 2 weeks
Before this change XCOPY code could allocate memory in chunks up to 16-32MB
(VMware does XCOPY in 4MB chunks by default), that could be difficult for
VM subsystem to do due to KVA fragmentation, that sometimes created huge
allocation delays, blocking any I/O for respective LU for that time.
This change limits allocations down to TPC_MAX_IO_SIZE, which is 1MB now.
1MB is also not a cookie, but ZFS also can do that for large blocks, so
it should be less dramatic. As drawback this increases CPU overhead, but
it still look acceptable comparing to time consumed by ZFS read/write.
MFC after: 1 week
sys/cam/ctl/ctl.c:
In ctl_datamove(), inside CTL_IO_DELAY, add a lun variable and fill
it in before trying to dereference it.
MFC after: 3 days
Sponsored by: Spectra Logic
Before this change MaxCmdSN was reported as CmdSN + delta, that made it
limit number of requests in transmission from the initiator to target,
that was pretty useless. After this change MaxCmdSN limits number of
requests queued to CTL, i.e. maximal queue depth for the initiator.
The default limit is 256 outstanding requests per initiator at a time.
This code uses existing cs_outstanding_ctl_pdus counter to track queue
depth. It's semantics doen't perfectly match, but close enough to not
add another counter. Just don't set the maxtags below 2.
MFC after: 2 weeks
all of them in terms of an sbuf-based back-end, xpt_path_sbuf. This
unifies the implementation, but more importantly it stops the output
fropm being split between 4 or more invocations of printf. The
multiple invocations cause interleaving of the messages on the
console during boot, making the output of disk discovery often
unintelligible. This change helps a lot, but more work is needed.
Reviewed by: ken, mav
Sponsored by: Netflix
If "capacity" LU option is set, ramdisk backend now implements featured
thin provisioned disk, storing data in malloc(9) allocated memory blocks
of pblocksize bytes (default PAGE_SIZE or 4KB). Additionally ~0.2% of LU
size is used for indirection tree (bigger pblocksize reduce the overhead).
Backend supports all unmap and anchor operations. If configured capacity
is overflowed, proper error conditions are reported.
If "capacity" LU option is not set, the backend operates mostly the same
as before without allocating real storage: writes go to nowhere, reads
return zeroes, reporting that all LBAs are unmapped.
This backend is still mostly oriented on testing and benchmarking (it is
still a volatile RAM disk), but now it should allow to run real FS tests,
not only simple dumb dd.
MFC after: 2 weeks
It is only a first step and not perfect, but better then nothing.
The main blocker is CAM target frontend, that can not be unloaded,
since CAM does not have mechanism to unregister periph driver now.
MFC after: 2 weeks
The length of the scsi_set_timestamp_parameters struct was incorrect. LTO-5
drives don't care, but LTO-7 drives do.
Reviewed by: Sam Klopsch
MFC after: 2 weeks
Sponsored by: Spectra Logic Corp
This field has no practical use and never readed. Initiators already
receive respective residual size from frontends. Removed field had
different semantics, which looks useless, and was never passed through
by any frontend.
While there, fix kern_data_resid field support in case of HA, missed in
r312291.
MFC after: 13 days
It seems like kern_data_resid was never really implemented. This change
finally does it. Now frontends update this field while transferring data,
while CTL/backends getting it can more flexibly handle the result.
At this point behavior should not change significantly, still reporting
errors on write overrun, but that may be changed later, if we decide so.
CAM target frontend still does not properly handle overruns due to CAM API
limitations. We may need to add some fields to struct ccb_accept_tio to
pass information about initiator requested transfer size(s).
MFC after: 2 weeks
Replace archaic "busses" with modern form "buses."
Intentionally excluded:
* Old/random drivers I didn't recognize
* Old hardware in general
* Use of "busses" in code as identifiers
No functional change.
http://grammarist.com/spelling/buses-busses/
PR: 216099
Reported by: bltsrc at mail.ru
Sponsored by: Dell EMC Isilon
Instead of collecting statistics for each combination of ports and logical
units, that consumed ~45KB per LU with present number of ports, collect
separate statistics for every port and every logical unit separately, that
consume only 176 bytes per each single LU/port. This reduces struct
ctl_lun size down to just 6KB.
Also new IOCTL API/ABI does not hardcode number of LUs/ports, and should
allow handling of very large quantities.
MFC after: 2 weeks (probably keeping old API enabled for some time)
This array takes 64KB of RAM now, that was more then half of struct ctl_lun
size. If at some point we support more ports, this may need another tune.
MFC after: 2 weeks
The sim_vid, hba_vid, and dev_name fields of struct ccb_pathinq are
fixed-length strings. AFAICT the only place they're read is in
sbin/camcontrol/camcontrol.c, which assumes they'll be null-terminated.
However, the kernel doesn't null-terminate them. A bunch of copy-pasted code
uses strncpy to write them, and doesn't guarantee null-termination. For at
least 4 drivers (mpr, mps, ciss, and hyperv), the hba_vid field actually
overflows. You can see the result by doing "camcontrol negotiate da0 -v".
This change null-terminates those fields everywhere they're set in the
kernel. It also shortens a few strings to ensure they'll fit within the
16-character field.
PR: 215474
Reported by: Coverity
CID: 1009997 1010000 1010001 1010002 1010003 1010004 1010005
CID: 1331519 1010006 1215097 1010007 1288967 1010008 1306000
CID: 1211924 1010009 1010010 1010011 1010012 1010013 1010014
CID: 1147190 1010017 1010016 1010018 1216435 1010020 1010021
CID: 1010022 1009666 1018185 1010023 1010025 1010026 1010027
CID: 1010028 1010029 1010030 1010031 1010033 1018186 1018187
CID: 1010035 1010036 1010042 1010041 1010040 1010039
Reviewed by: imp, sephe, slm
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D9037
Differential Revision: https://reviews.freebsd.org/D9038
observed to fix any actual error, but it's the right thing to do
from the correctness point of view.
Tested by: Eugene M. Zheganin <emz at norma.perm.ru>
MFC after: 1 month
- Since I/Os are allocates from per-port pools, make allocations store
pointer to CTL softc there, and use it where needed instead of global.
- Created bunch of helper macros to access LUN, port and CTL softc.
MFC after: 2 weeks
We do not have non-volatile memory to really save those values, so we
neither report nor support this capability. Also saved mode pages are
not replicated between HA peers now.
MFC after: 2 weeks
Those two values are not directly related, so make them independent.
This does not change any limits immediately, but makes number of LUNs
per port controllable via tunable/sysctl kern.cam.ctl.lun_map_size.
After this change increasing CTL_MAX_LUNS should be pretty cheap,
and even making it tunable should be easy.
MFC after: 2 weeks
For EXTENDED COPY:
- improve parameters checking to report some errors before copy start;
- forward sense data from copy target as descriptor in case of error;
- report which CSCD reported error in sense key specific information.
For WRITE USING TOKEN:
- pass through real sense data from copy target instead of reporting
our copy error, since for initiator its a "simple" write, not a copy.
MFC after: 2 weeks
- Allow maximal sense size limitation via Control Extension mode page.
- When sense size limited, include descriptors atomically: whole or none.
- Set new SDAT_OVFL bit if some descriptors don't fit the limit.
- Report real written sense length instead of static maximal 252 bytes.
MFC after: 2 weeks
VMware tries to enable this bit to avoid multiple threshold notifications
in case of multiple initiators connected to the same LUN. Unfortunately
their code sends MODE SELECT(6) request with parameter length hardcoded
for the page without any thresholds. Since we have four threshold and our
page is bigger, this attempt fails, that is correct in my understanding.
So all we can do about this now is to report proper error code and hope
VMware fix their code one day.
MFC after: 2 weeks
for INFORMATION field fit into available 4 bytes (has no non-zero bytes
except last 4), as explicitly required by SPC-5 specification.
MFC after: 2 weeks
While CTL still has no real events to report in this way (like SMART),
it is possible to trigger false event by manually setting TEST bit in
Informational Exceptions Control mode page, that can be useful for
initiator testing. This code supports all flavours of IE reporting:
UNIT ATTENTION, RECOVERED ERROR and NO SENSE sense keys, REQUEST SENSE
command and Informational Exceptions log page.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
Under kern.cam we have certain sysctls that are per-device, such as the
ones under kern.cam.ada.[0-9]+.*. Add a "device_index" label annotation
to such sysctls, so that the Prometheus metrics exporter will give all
of those metrics the same name. The device number will be added to the
metric name as the "device_index" label.
Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D8775
This adds support to camcontrol(8) and libcam(3) for getting and setting
the time on SCSI protocol drives. This is more commonly found on tape
drives, but is a SPC (SCSI Primary Commands) command, and may be found
on any device that speaks SCSI.
The new camcontrol timestamp subcommand allows getting the current device
time or setting the time to the current system time or any arbitrary time.
sbin/camcontrol/Makefile:
Add timestamp.c.
sbin/camcontrol/camcontrol.8:
Document the new timestamp subcommand.
sbin/camcontrol/camcontrol.c:
Add the timestamp subcommand to camcontrol.
sbin/camcontrol/camcontrol.h:
Add the timestamp() function prototype.
sbin/camcontrol/timestamp.c:
Timestamp setting and reporting functionality.
sys/cam/scsi/scsi_all.c:
Add two new CCB building functions, scsi_set_timestamp() and
scsi_report_timestamp(). Also, add a new helper function,
scsi_create_timestamp().
sys/cam/scsi/scsi_all.h:
Add CDB and parameter data for the the set and report timestamp
commands.
Add function declarations for the new CCB building and helper
functions.
Submitted by: Sam Klopsch
Sponsored by: Spectra Logic
MFC After: 2 weeks
- On control request update all status pages, since they may also be
affected if user enables/disables enclosure slots.
- Periodically update element descriptors too, since there is some
hardware where they are changed dynamically.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
