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2016-09-20selftests: move ptp tests from Documentation/ptpShuah Khan6-9/+9
Remove ptp from Makefile to move the test to selftests. Update ptp Makefile to work under selftests. ptp will not be run as part of selftests suite and will not be included in install targets. They can be built separately for now. Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-09-20selftests: move prctl tests from Documentation/prctlShuah Khan7-11/+16
Move prctl tests from Documentation/prctl to selftests/prctl. Remove prctl from Makefile to move the test. Update prctl Makefile to work under selftests. prctl will not be run as part of selftests suite and will not be included in install targets. They can be built separately for now. Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-09-20selftests: move dnotify_test from Documentation/filesystemsShuah Khan5-6/+8
Move dnotify_test.c, Makefile, and .gitignore from Documentation/filesystems to selftests/filesystems. Remove filesystems build target from Documentation/Makefile and update selftests/filesystems/Makefile to work under selftests. dnotify_test will not be run as part of selftests suite and will not be included in install targets. It can be built separately for now. Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-09-20selftests/timers: Add missing error code assignment before testChristophe JAILLET1-2/+2
In order to work, the 'err' return value has to be updated otherwise the test can never be true. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-09-20selftests/zram: replace ZRAM_LZ4_COMPRESSFabian Frederick1-1/+1
Since commit ce1ed9f98e88 ("zram: delete custom lzo/lz4") we need CONFIG_CRYPTO_LZ4=y instead of CONFIG_ZRAM_LZ4_COMPRESS Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-09-20kselftest: kselftest documentation improvementAleksander Alekseev1-2/+3
Suggested patch solves two issues: 1) Currently documentation is unclear whether `make kselftest` should be run before or after kernel was installed and booted. `make help` gives a clear answer on that: "kselftest - Build and run kernel selftest (run as root). Build, install, and boot kernel before running kselftest on it." 2) Documentation states that `make kselftest` executes "unit" tests. Technically it's not a _unit_ test if it requires to install an application first. It's either integration or system test. To not to confuse a user I suggest not to use a word "unit". Signed-off-by: Aleksander Alekseev <afiskon@devzen.ru> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2016-08-07Linux 4.8-rc1Linus Torvalds1-2/+2
2016-08-07block: rename bio bi_rw to bi_opfJens Axboe51-157/+158
Since commit 63a4cc24867d, bio->bi_rw contains flags in the lower portion and the op code in the higher portions. This means that old code that relies on manually setting bi_rw is most likely going to be broken. Instead of letting that brokeness linger, rename the member, to force old and out-of-tree code to break at compile time instead of at runtime. No intended functional changes in this commit. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07target: iblock_execute_sync_cache() should use bio_set_op_attrs()Jens Axboe1-1/+1
The original commit missed this function, it needs to mark it a write flush. Cc: Mike Christie <mchristi@redhat.com> Fixes: e742fc32fcb4 ("target: use bio op accessors") Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07mm: make __swap_writepage() use bio_set_op_attrs()Jens Axboe1-2/+3
Cleaner than manipulating bio->bi_rw flags directly. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07block/mm: make bdev_ops->rw_page() take a bool for read/writeJens Axboe11-53/+51
Commit abf545484d31 changed it from an 'rw' flags type to the newer ops based interface, but now we're effectively leaking some bdev internals to the rest of the kernel. Since we only care about whether it's a read or a write at that level, just pass in a bool 'is_write' parameter instead. Then we can also move op_is_write() and friends back under CONFIG_BLOCK protection. Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07fs: return EPERM on immutable inodeEryu Guan4-4/+5
In most cases, EPERM is returned on immutable inode, and there're only a few places returning EACCES. I noticed this when running LTP on overlayfs, setxattr03 failed due to unexpected EACCES on immutable inode. So converting all EACCES to EPERM on immutable inode. Acked-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-05ramoops: use persistent_ram_free() instead of kfree() for freeing przHiraku Toyooka1-3/+3
persistent_ram_zone(=prz) structures are allocated by persistent_ram_new(), which includes vmap() or ioremap(). But they are currently freed by kfree(). This uses persistent_ram_free() for correct this asymmetry usage. Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.kw@hitachi.com> Cc: Mark Salyzyn <salyzyn@android.com> Cc: Seiji Aguchi <seiji.aguchi.tr@hitachi.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2016-08-05ramoops: use DT reserved-memory bindingsKees Cook4-33/+56
Instead of a ramoops-specific node, use a child node of /reserved-memory. This requires that of_platform_device_create() be explicitly called for the node, though, since "/reserved-memory" does not have its own "compatible" property. Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Rob Herring <robh@kernel.org>
2016-08-05NTB: ntb_hw_intel: use local variable pdevAllen Hubbe1-5/+5
Clean up duplicated expression by replacing it with the equivalent local variable pdev. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05NTB: ntb_hw_intel: show BAR size in debugfs infoAllen Hubbe1-1/+38
It will be useful to know the hardware configured BAR size to diagnose issues with NTB memory windows. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_test: Add a selftest script for the NTB subsystemLogan Gunthorpe2-0/+423
This script automates testing doorbells, scratchpads and memory windows for an NTB device. It can be run locally, with the NTB looped back to the same host or use SSH to remotely control the second host. In the single host case, the script just needs to be passed two arguments: a PCI ID for each side of the link. In the two host case the -r option must be used to specify the remote hostname (which must be SSH accessible and should probably have ssh-keys exchanged). A sample run looks like this: $ sudo ./ntb_test.sh 0000:03:00.1 0000:83:00.1 -p 29 Starting ntb_tool tests... Running link tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running link tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running db tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running db tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running spad tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running spad tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running mw0 tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running mw0 tests on: 0000:83:00.1 / 0000:03:00.1 Passed Running mw1 tests on: 0000:03:00.1 / 0000:83:00.1 Passed Running mw1 tests on: 0000:83:00.1 / 0000:03:00.1 Passed Starting ntb_pingpong tests... Running ping pong tests on: 0000:03:00.1 / 0000:83:00.1 Passed Starting ntb_perf tests... Running local perf test without DMA 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s Passed Running remote perf test without DMA 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s Passed Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: clear link_is_up flag when the link goes down.Logan Gunthorpe1-19/+9
When the link goes down, the link_is_up flag did not return to false. This could have caused some subtle corner case bugs when the link goes up and down quickly. Once that was fixed, there was found to be a race if the link was brought down then immediately up. The link_cleanup work would occasionally be scheduled after the next link up event. This would cancel the link_work that was supposed to occur and leave ntb_perf in an unusable state. To fix this we get rid of the link_cleanup work and put the actions directly in the link_down event. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_pingpong: Add a debugfs file to get the ping countLogan Gunthorpe1-1/+61
This commit adds a debugfs 'count' file to ntb_pingpong. This is so testing with ntb_pingpong can be automated beyond just checking the logs for pong messages. The count file returns a number which increments every pong. The counter can be cleared by writing a zero. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Add link status and files to debugfsLogan Gunthorpe1-0/+92
In order to more successfully script with ntb_tool it's useful to have a link file to check the link status so that the script doesn't use the other files until the link is up. This commit adds a 'link' file to the debugfs directory which reads boolean (Y or N) depending on the link status. Writing to the file change the link state using ntb_link_enable or ntb_link_disable. A 'link_event' file is also provided so an application can block until the link changes to the desired state. If the user writes a 1, it will block until the link is up. If the user writes a 0, it will block until the link is down. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Postpone memory window initialization for the userLogan Gunthorpe1-138/+228
In order to make the interface closer to the raw NTB API, this commit changes memory windows so they are not initialized on link up. Instead, the 'peer_trans*' debugfs files are introduced. When read, they return information provided by ntb_mw_get_range. When written, they create a buffer and initialize the memory window. The value written is taken as the requested size of the buffer (which is then rounded for alignment). Writing a value of zero frees the buffer and tears down the memory window translation. The 'peer_mw*' file is only created once the memory window translation is setup by the user. Additionally, it was noticed that the read and write functions for the 'peer_mw*' files should have checked for a NULL pointer. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Wait for link before running testLogan Gunthorpe1-1/+4
Instead of returning immediately with an error when the link is down, wait for the link to come up (or the user sends a SIGINT). This is to make scripting ntb_perf easier. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Return results by reading the run fileLogan Gunthorpe1-12/+55
Instead of having to watch logs, allow the results to be retrieved by reading back the run file. This file will return "running" when the test is running and nothing if no tests have been run yet. It returns 1 line per thread, and will display an error message if the corresponding thread returns an error. With the above change, the pr_info calls that returned the results are then changed to pr_debug calls. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Improve thread handling to increase robustnessLogan Gunthorpe1-48/+76
This commit accomplishes a few things: 1) Properly prevent multiple sets of threads from running at once using a mutex. Lots of race issues existed with the thread_cleanup. 2) The mutex allows us to ensure that threads are finished before tearing down the device or module. 3) Don't use kthread_stop when the threads can exit by themselves, as this is counter-indicated by the kthread_create documentation. Threads now wait for kthread_stop to occur. 4) Writing to the run file now blocks until the threads are complete. The test can then be safely interrupted by a SIGINT. Also, while I was at it: 5) debugfs_run_write shouldn't return 0 in the early check cases as this could cause debugfs_run_write to loop undesirably. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Schedule based on time not on performanceLogan Gunthorpe1-2/+4
When debugging performance problems, if some issue causes the ntb hardware to be significantly slower than expected, ntb_perf will hang requiring a reboot because it only schedules once every 4GB. Instead, schedule based on jiffies so it will not hang the CPU if the transfer is slow. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_transport: Check the number of spads the hardware supportsLogan Gunthorpe2-4/+13
I'm working on hardware that currently has a limited number of scratchpad registers and ntb_ndev fails with no clue as to why. I feel it is better to fail early and provide a reasonable error message then to fail later on. The same is done to ntb_perf, but it doesn't currently require enough spads to actually fail. I've also removed the unused SPAD_MSG and SPAD_ACK enums so that MAX_SPAD accurately reflects the number of spads used. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Add memory window debug supportLogan Gunthorpe1-1/+257
We allocate some memory window buffers when the link comes up, then we provide debugfs files to read/write each side of the link. This is useful for debugging the mapping when writing new drivers. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_perf: Allow limiting the size of the memory windowsLogan Gunthorpe1-0/+8
On my system, dma_alloc_coherent won't produce memory anywhere near the size of the BAR. So I needed a way to limit this. It's pretty much copied straight from ntb_transport. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05NTB: allocate number transport entries depending on size of ring sizeDave Jiang1-2/+27
Currently we only allocate a fixed default number of descriptors for the tx and rx side. We should dynamically resize it to the number of descriptors resides in the transport rings. We should know the number of transmit descriptors at initializaiton. We will allocate the default number of descriptors for receive side and allocate additional ones when we know the actual max entries for receive. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Allen Hubbe <allen.hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: BUG: Ensure the buffer size is large enough to return all spadsLogan Gunthorpe1-2/+8
On hardware with 32 scratchpad registers the spad field in ntb tool could chop off the end. The maximum buffer size is increased from 256 to 15 times the number or scratchpads. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-08-05ntb_tool: Fix infinite loop bug when writing spad/peer_spad fileLogan Gunthorpe1-4/+5
If you tried to write two spads in one line, as per the example: root@peer# echo '0 0x01010101 1 0x7f7f7f7f' > $DBG_DIR/peer_spad then the CPU would freeze in an infinite loop. This wasn't immediately obvious but 'pos' was not incrementing the buffer, so after reading the second pair of values, 'pos' would once again be 3 and it would re-read the second pair of values ad infinitum. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>