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* MFC, r295417:ken2016-02-191-1/+1
| | | | | | | | | | | | | | r295417 | ken | 2016-02-08 15:13:08 -0700 (Mon, 08 Feb 2016) | 9 lines Fix the SCSI Extended INQUIRY probe case when an error is returned and a retry is scheduled. Instead of leaving the device queue frozen, unfreeze the device queue so that the retry can happen. Sponsored by: Spectra Logic Approved by: re (gjb)
* MFC r293350:kib2016-01-287-89/+129
| | | | Convert sys/cam to use make_dev_s().
* MFC r292290: Set DS flag, required for LPB log page by spec.mav2015-12-221-0/+2
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* MFC r291716, r291724, r291741, r291742ken2015-12-167-64/+1620
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In addition to those revisions, add this change to a file that is not in head: sys/ia64/include/bus.h: Guard kernel-only parts of the ia64 machine/bus.h header with #ifdef _KERNEL. This allows userland programs to include <machine/bus.h> to get the definition of bus_addr_t and bus_size_t. ------------------------------------------------------------------------ r291716 | ken | 2015-12-03 15:54:55 -0500 (Thu, 03 Dec 2015) | 257 lines Add asynchronous command support to the pass(4) driver, and the new camdd(8) utility. CCBs may be queued to the driver via the new CAMIOQUEUE ioctl, and completed CCBs may be retrieved via the CAMIOGET ioctl. User processes can use poll(2) or kevent(2) to get notification when I/O has completed. While the existing CAMIOCOMMAND blocking ioctl interface only supports user virtual data pointers in a CCB (generally only one per CCB), the new CAMIOQUEUE ioctl supports user virtual and physical address pointers, as well as user virtual and physical scatter/gather lists. This allows user applications to have more flexibility in their data handling operations. Kernel memory for data transferred via the queued interface is allocated from the zone allocator in MAXPHYS sized chunks, and user data is copied in and out. This is likely faster than the vmapbuf()/vunmapbuf() method used by the CAMIOCOMMAND ioctl in configurations with many processors (there are more TLB shootdowns caused by the mapping/unmapping operation) but may not be as fast as running with unmapped I/O. The new memory handling model for user requests also allows applications to send CCBs with request sizes that are larger than MAXPHYS. The pass(4) driver now limits queued requests to the I/O size listed by the SIM driver in the maxio field in the Path Inquiry (XPT_PATH_INQ) CCB. There are some things things would be good to add: 1. Come up with a way to do unmapped I/O on multiple buffers. Currently the unmapped I/O interface operates on a struct bio, which includes only one address and length. It would be nice to be able to send an unmapped scatter/gather list down to busdma. This would allow eliminating the copy we currently do for data. 2. Add an ioctl to list currently outstanding CCBs in the various queues. 3. Add an ioctl to cancel a request, or use the XPT_ABORT CCB to do that. 4. Test physical address support. Virtual pointers and scatter gather lists have been tested, but I have not yet tested physical addresses or scatter/gather lists. 5. Investigate multiple queue support. At the moment there is one queue of commands per pass(4) device. If multiple processes open the device, they will submit I/O into the same queue and get events for the same completions. This is probably the right model for most applications, but it is something that could be changed later on. Also, add a new utility, camdd(8) that uses the asynchronous pass(4) driver interface. This utility is intended to be a basic data transfer/copy utility, a simple benchmark utility, and an example of how to use the asynchronous pass(4) interface. It can copy data to and from pass(4) devices using any target queue depth, starting offset and blocksize for the input and ouptut devices. It currently only supports SCSI devices, but could be easily extended to support ATA devices. It can also copy data to and from regular files, block devices, tape devices, pipes, stdin, and stdout. It does not support queueing multiple commands to any of those targets, since it uses the standard read(2)/write(2)/writev(2)/readv(2) system calls. The I/O is done by two threads, one for the reader and one for the writer. The reader thread sends completed read requests to the writer thread in strictly sequential order, even if they complete out of order. That could be modified later on for random I/O patterns or slightly out of order I/O. camdd(8) uses kqueue(2)/kevent(2) to get I/O completion events from the pass(4) driver and also to send request notifications internally. For pass(4) devcies, camdd(8) uses a single buffer (CAM_DATA_VADDR) per CAM CCB on the reading side, and a scatter/gather list (CAM_DATA_SG) on the writing side. In addition to testing both interfaces, this makes any potential reblocking of I/O easier. No data is copied between the reader and the writer, but rather the reader's buffers are split into multiple I/O requests or combined into a single I/O request depending on the input and output blocksize. For the file I/O path, camdd(8) also uses a single buffer (read(2), write(2), pread(2) or pwrite(2)) on reads, and a scatter/gather list (readv(2), writev(2), preadv(2), pwritev(2)) on writes. Things that would be nice to do for camdd(8) eventually: 1. Add support for I/O pattern generation. Patterns like all zeros, all ones, LBA-based patterns, random patterns, etc. Right Now you can always use /dev/zero, /dev/random, etc. 2. Add support for a "sink" mode, so we do only reads with no writes. Right now, you can use /dev/null. 3. Add support for automatic queue depth probing, so that we can figure out the right queue depth on the input and output side for maximum throughput. At the moment it defaults to 6. 4. Add support for SATA device passthrough I/O. 5. Add support for random LBAs and/or lengths on the input and output sides. 6. Track average per-I/O latency and busy time. The busy time and latency could also feed in to the automatic queue depth determination. sys/cam/scsi/scsi_pass.h: Define two new ioctls, CAMIOQUEUE and CAMIOGET, that queue and fetch asynchronous CAM CCBs respectively. Although these ioctls do not have a declared argument, they both take a union ccb pointer. If we declare a size here, the ioctl code in sys/kern/sys_generic.c will malloc and free a buffer for either the CCB or the CCB pointer (depending on how it is declared). Since we have to keep a copy of the CCB (which is fairly large) anyway, having the ioctl malloc and free a CCB for each call is wasteful. sys/cam/scsi/scsi_pass.c: Add asynchronous CCB support. Add two new ioctls, CAMIOQUEUE and CAMIOGET. CAMIOQUEUE adds a CCB to the incoming queue. The CCB is executed immediately (and moved to the active queue) if it is an immediate CCB, but otherwise it will be executed in passstart() when a CCB is available from the transport layer. When CCBs are completed (because they are immediate or passdone() if they are queued), they are put on the done queue. If we get the final close on the device before all pending I/O is complete, all active I/O is moved to the abandoned queue and we increment the peripheral reference count so that the peripheral driver instance doesn't go away before all pending I/O is done. The new passcreatezone() function is called on the first call to the CAMIOQUEUE ioctl on a given device to allocate the UMA zones for I/O requests and S/G list buffers. This may be good to move off to a taskqueue at some point. The new passmemsetup() function allocates memory and scatter/gather lists to hold the user's data, and copies in any data that needs to be written. For virtual pointers (CAM_DATA_VADDR), the kernel buffer is malloced from the new pass(4) driver malloc bucket. For virtual scatter/gather lists (CAM_DATA_SG), buffers are allocated from a new per-pass(9) UMA zone in MAXPHYS-sized chunks. Physical pointers are passed in unchanged. We have support for up to 16 scatter/gather segments (for the user and kernel S/G lists) in the default struct pass_io_req, so requests with longer S/G lists require an extra kernel malloc. The new passcopysglist() function copies a user scatter/gather list to a kernel scatter/gather list. The number of elements in each list may be different, but (obviously) the amount of data stored has to be identical. The new passmemdone() function copies data out for the CAM_DATA_VADDR and CAM_DATA_SG cases. The new passiocleanup() function restores data pointers in user CCBs and frees memory. Add new functions to support kqueue(2)/kevent(2): passreadfilt() tells kevent whether or not the done queue is empty. passkqfilter() adds a knote to our list. passreadfiltdetach() removes a knote from our list. Add a new function, passpoll(), for poll(2)/select(2) to use. Add devstat(9) support for the queued CCB path. sys/cam/ata/ata_da.c: Add support for the BIO_VLIST bio type. sys/cam/cam_ccb.h: Add a new enumeration for the xflags field in the CCB header. (This doesn't change the CCB header, just adds an enumeration to use.) sys/cam/cam_xpt.c: Add a new function, xpt_setup_ccb_flags(), that allows specifying CCB flags. sys/cam/cam_xpt.h: Add a prototype for xpt_setup_ccb_flags(). sys/cam/scsi/scsi_da.c: Add support for BIO_VLIST. sys/dev/md/md.c: Add BIO_VLIST support to md(4). sys/geom/geom_disk.c: Add BIO_VLIST support to the GEOM disk class. Re-factor the I/O size limiting code in g_disk_start() a bit. sys/kern/subr_bus_dma.c: Change _bus_dmamap_load_vlist() to take a starting offset and length. Add a new function, _bus_dmamap_load_pages(), that will load a list of physical pages starting at an offset. Update _bus_dmamap_load_bio() to allow loading BIO_VLIST bios. Allow unmapped I/O to start at an offset. sys/kern/subr_uio.c: Add two new functions, physcopyin_vlist() and physcopyout_vlist(). sys/pc98/include/bus.h: Guard kernel-only parts of the pc98 machine/bus.h header with #ifdef _KERNEL. This allows userland programs to include <machine/bus.h> to get the definition of bus_addr_t and bus_size_t. sys/sys/bio.h: Add a new bio flag, BIO_VLIST. sys/sys/uio.h: Add prototypes for physcopyin_vlist() and physcopyout_vlist(). share/man/man4/pass.4: Document the CAMIOQUEUE and CAMIOGET ioctls. usr.sbin/Makefile: Add camdd. usr.sbin/camdd/Makefile: Add a makefile for camdd(8). usr.sbin/camdd/camdd.8: Man page for camdd(8). usr.sbin/camdd/camdd.c: The new camdd(8) utility. Sponsored by: Spectra Logic ------------------------------------------------------------------------ r291724 | ken | 2015-12-03 17:07:01 -0500 (Thu, 03 Dec 2015) | 6 lines Fix typos in the camdd(8) usage() function output caused by an error in my diff filter script. Sponsored by: Spectra Logic ------------------------------------------------------------------------ r291741 | ken | 2015-12-03 22:38:35 -0500 (Thu, 03 Dec 2015) | 10 lines Fix g_disk_vlist_limit() to work properly with deletes. Add a new bp argument to g_disk_maxsegs(), and add a new function, g_disk_maxsize() tha will properly determine the maximum I/O size for a delete or non-delete bio. Submitted by: will Sponsored by: Spectra Logic ------------------------------------------------------------------------ ------------------------------------------------------------------------ r291742 | ken | 2015-12-03 22:44:12 -0500 (Thu, 03 Dec 2015) | 5 lines Fix a style issue in g_disk_limit(). Noticed by: bdrewery ------------------------------------------------------------------------ Sponsored by: Spectra Logic
* MFC r289138: Remove legacy CHS geometry from dmesg and unify capacity outputs.mav2015-11-303-17/+11
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* MFC r291383: Fix panic when trying to sort unsupported command in OOA queue.mav2015-11-301-0/+2
| | | | Handle unsupported commands as not conflicting/blocking.
* MFC r291126:mav2015-11-283-3/+58
| | | | | | | | | | Add API to obtain primary enclosure name and ID for /dev/sesX devices. sesX device number may change between reboots, so to properly identify the instance we need more data. Name and ID reported here may mach ones reported by SCSI device, but that is not really required by specs. Sponsored by: iXsystems, Inc.
* MFC r290820: Add NULL check to make Coverity happy.mav2015-11-271-1/+2
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* MFC r290670: Modify target port groups logic in CTL.mav2015-11-274-33/+82
| | | | | | | | | | | | | | | | | - Introduce "ha_shared" port option, which being set to "on" moves the port into separate port group, shared between HA nodes. This allows to better handle cases when iSCSI portals are bound to CARP address that can dynamically move between nodes. Some initiators (at least VMware) don't detect that after iSCSI reconnect they've attached to different SCSI port from different port group, that totally breakes ALUA status parsing. In theory, I believe, it should be enough to have different iSCSI portal group tags on different nodes to make initiators detect this condition, but it seems like VMware ignores those values, and even full LUN retaste forced by UA does not help. - Make CTL report up to three port groups: 1 -- non-HA mode or ports with "ha_shared" option set, 2 -- HA node 1, 3 -- HA node 2. - Report Transitioning state for all port groups when HA interlink is connected, but neither of nodes is primary for the LUN.
* MFC r290458: Add two more KASSERTs.mav2015-11-131-0/+8
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* MFC r290387: Extend mask of VMware virtual disks.mav2015-11-131-1/+1
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* MFC r289881: Give CTL support for PIM_EXTLUNS when talking to CAM.mav2015-11-135-101/+103
| | | | | CTL itself still lives in flat LUN space, but it can generate extended numbers if CAM SIM reports such capability.
* MFC r289843: Add partial support for QUERY TMF to CAM and isp(4).mav2015-11-132-8/+21
| | | | | | | | This change allows to decode respective functions in isp(4) in target mode and pass them through CAM to CTL. Unfortunately neither CAM nor isp(4) support returning response info for those task management functions now. On the other side I just have no initiator to test this functionality.
* MFC r289702: Make some panic strings mode informative.mav2015-11-132-47/+48
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* MFC r290462: Removed unused malloc types.mav2015-11-132-4/+0
| | | | Submitted by: Dmitry Luhtionov <dmitryluhtionov@gmail.com>
* MFC r289819: Fix LUN disable in CAM broken at r285155.mav2015-10-301-1/+1
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* MFC r290004: Don't try to replicate mode pages not present on this device.mav2015-10-291-0/+5
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* MFC r289146:mav2015-10-251-37/+35
| | | | | | | | | Make delete method set via kern.cam.da.X.delete_method persistent. This allows to set delete method via tunable, before device capabilities are known. Also allow ZERO method for devices not reporting LBP, if user explicitly requests it -- it may be useful if storage supports compression and WRITE SAME, but does not support UNMAP.
* MFC r289136: Remove lock upgrade attempt from ctl_be_block_open_file().mav2015-10-181-15/+0
| | | | | | I am not sure what for it was done. Now open routine should automatically fall back to read-only if open for writing is impossible. In such case attempt to upgrade to write sounds strange.
* MFC r289017: Add missing vnode lock in case of file modify request.mav2015-10-151-2/+4
| | | | Submitted by: Richard Kojedzinszky
* MFC r288458: More aggressively fill WUT read pipeline.mav2015-10-051-5/+4
| | | | On some tests I've measured 5% copy speedup from this.
* MFC r288450: Make zero WUT use WRITE SAME with recently allowed NDOB flag.mav2015-10-051-5/+3
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* MFC r288449:mav2015-10-051-1/+9
| | | | Implement SPC-3 exceptions to SPC-2 RESERVE and RELEASE behavior.
* MFC r288448: Unify PR variable names to reduce confusion.mav2015-10-052-66/+66
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* MFC r288427: Use proper STAILQ_* macros where possible.mav2015-10-052-20/+7
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* MFC r288420: Make pass, sg and targ drivers respect HBA's maxio.mav2015-10-056-8/+35
| | | | Previous limitation of 64K (DFLTPHYS) is quite annoying.
* MFC r288369: Really implement PREVENT ALLOW MEDIUM REMOVAL command.mav2015-10-055-21/+66
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* MFC r288368: Don't report SYNC_NV bit set in SYNCHRONIZE CACHE as error.mav2015-10-051-2/+2
| | | | | While this bit is obsolete in SBC-3, behavior controlled by it is allowed on device discretion.
* MFC r288367: Fix arguments order.mav2015-10-051-8/+8
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* MFC r288359: Report that we can read all flavours of DVD. Why not?mav2015-10-051-1/+55
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* MFC r288358: Add CD/DVD Capabilities and Mechanical Status Page.mav2015-10-053-0/+102
| | | | | | This page is obsolete since MMC-4, but still used by some software. approved by:
* MFC r288348: Umplement media load/eject support for removable devices.mav2015-10-0510-338/+228
| | | | | In case of block backend eject really closes the backing store, while load tries to open it back. Failed store open is reported as no media.
* MFC r288310: Add to CTL initial support for CDROMs and removable devices.mav2015-10-057-131/+699
| | | | Relnotes: yes
* MFC r288264: Allow LOG SENSE command on non-disk devices.mav2015-10-052-2/+5
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* MFC r288262: Remove concept of control device.mav2015-10-051-62/+24
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* MFC r288261: Move ioctl frontend defines where they belong.mav2015-10-052-12/+12
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* MFC r288260: Remove few more unused variables.mav2015-10-052-4/+0
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* MFC r288259: Remove some duplicate, legacy, dead and questionable code.mav2015-10-058-406/+23
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* MFC r288247: Pass to sobind() copy of the address, not the original.mav2015-10-051-2/+6
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* MFC r288239: Properly lock LUN in ctl_failover_lun().mav2015-10-051-7/+25
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* MFC r288224: Constify ctl_serialize_table.mav2015-10-052-2/+2
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* MFC r288229: Fix bit masks changed for the wrong commands in r288221.mav2015-10-051-4/+4
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* MFC r288221: Remove some dead code found by Clang analyzer.mav2015-10-0510-220/+17
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* MFC r288220: Remove stale comments and some excessive empty lines.mav2015-10-052-84/+10
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* MFC r288215: Switch I/O time accounting from system time to uptime.mav2015-10-054-24/+24
| | | | While there, make num_dmas accounted independently of CTL_TIME_IO.
* MFC r288214: Collect DMA statistics on secondary HA node.mav2015-10-051-3/+13
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* MFC r288213:mav2015-10-051-236/+171
| | | | | | | Make HA handle datamove and done in a universal way, using port methods. Now from primary node point of view requests transferred from secondary node should look almost normal and always have valid port.
* MFC r288211: Remove some control_softc references.mav2015-10-056-52/+25
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* MFC r288175: Allow WRITE SAME with NDOB bit set but without UNMAP.mav2015-10-052-4/+8
| | | | This combination was originally forbidden, but allowed at spc4r3.
* MFC r288170: Add new report types to REPORT LUNS command.mav2015-10-052-4/+7
| | | | This is only for completeness, since we have nothing new to report there.
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