May 2016 - Linux-nvdimm

[PATCH v3 0/2] Support ACPI 6.1 update in NFIT Control Region Structure

by Toshi Kani

ACPI 6.1, Table 5-133, updates NVDIMM Control Region Structure as follows. - Valid Fields, Manufacturing Location, and Manufacturing Date are added from reserved range. No change in the structure size. - IDs (SPD values) are stored as arrays of bytes (i.e. big-endian format). The spec clarifies that they need to be represented as arrays of bytes as well. Patch 1 changes the NFIT driver to comply with ACPI 6.1. Patch 2 adds a new sysfs file "id" to show NVDIMM ID defined in ACPI 6.1. The patch-set applies on linux-pm.git acpica. link: http://www.uefi.org/sites/default/files/resources/ACPI_6_1.pdf --- v3: - Need to coordinate with ACPICA update (Bob Moore, Dan Williams) - Integrate with ACPICA changes in struct acpi_nfit_control_region. (commit 138a95547ab0) v2: - Remove 'mfg_location' and 'mfg_date'. (Dan Williams) - Rename 'unique_id' to 'id' and make this change as a separate patch. (Dan Williams) --- Toshi Kani (3): 1/2 acpi/nfit: Update nfit driver to comply with ACPI 6.1 2/3 acpi/nfit: Add sysfs "id" for NVDIMM ID --- drivers/acpi/nfit.c | 29 ++++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-)

2 years, 8 months

4
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[PATCH] nfit: add Microsoft NVDIMM DSM command set to white list

by Stuart Hayes

Add the Microsoft _DSM command set to the white list of NVDIMM command sets. This command set is documented at https://msdn.microsoft.com/library/windows/hardware/mt604741. Signed-off-by: Stuart Hayes <stuart.w.hayes(a)gmail.com> --- drivers/acpi/nfit.c | 9 ++++++--- drivers/acpi/nfit.h | 4 ++++ include/uapi/linux/ndctl.h | 1 + 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index 2215fc8..48fc575 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -1130,11 +1130,11 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, } /* - * Until standardization materializes we need to consider up to 3 + * Until standardization materializes we need to consider several * different command sets. Note, that checking for function0 (bit0) * tells us if any commands are reachable through this uuid. */ - for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_HPE2; i++) + for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_MSFT; i++) if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1)) break; @@ -1150,7 +1150,9 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, dsm_mask = 0x1fe; if (disable_vendor_specific) dsm_mask &= ~(1 << 8); - } else { + } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) + dsm_mask = 0xffffffff; + else { dev_err(dev, "unknown dimm command family\n"); nfit_mem->family = -1; return force_enable_dimms ? 0 : -ENODEV; @@ -2692,6 +2694,7 @@ static __init int nfit_init(void) acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]); acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]); acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]); + acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT, nfit_uuid[NFIT_DEV_DIMM_N_MSFT]); nfit_wq = create_singlethread_workqueue("nfit"); if (!nfit_wq) diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h index 11cb383..f06fa91 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit.h @@ -31,6 +31,9 @@ #define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6" #define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e" +/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */ +#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05" + #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \ | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \ | ACPI_NFIT_MEM_NOT_ARMED) @@ -40,6 +43,7 @@ enum nfit_uuids { NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL, NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1, NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2, + NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT, NFIT_SPA_VOLATILE, NFIT_SPA_PM, NFIT_SPA_DCR, diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index 309915f..ba5a8c7 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -298,6 +298,7 @@ struct nd_cmd_pkg { #define NVDIMM_FAMILY_INTEL 0 #define NVDIMM_FAMILY_HPE1 1 #define NVDIMM_FAMILY_HPE2 2 +#define NVDIMM_FAMILY_MSFT 3 #define ND_IOCTL_CALL _IOWR(ND_IOCTL, ND_CMD_CALL,\ struct nd_cmd_pkg) -- 1.8.3.1

4 years, 8 months

3
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linux-next memleak after IO on dax mountpoint

by Xiong Zhou

Hi, Reporting an oom/memleak issue in linux-next tree: #Description: dbench invokes oom-killer, make host unavaiable. dbench was doing IO on nvdimm device mounted fs with dax mount option. It happens on both xfs and ext4 filesystems. It does not happen testing without dax mountoption. Seems like memleak keep happening untill system run out of memory. On good kernels, memory get freed after every dbench run. #Hardware lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 48 On-line CPU(s) list: 0-47 Thread(s) per core: 2 Core(s) per socket: 12 Socket(s): 2 NUMA node(s): 2 Vendor ID: GenuineIntel CPU family: 6 Model: 63 Model name: Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz Stepping: 2 CPU MHz: 2596.781 BogoMIPS: 5200.05 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 30720K NUMA node0 CPU(s): 0-11,24-35 NUMA node1 CPU(s): 12-23,36-47 free -g total used free shared buff/cache available Mem: 31 0 30 0 0 30 Swap: 9 0 9 #Version: Since next-20150517 tree, till latest 0526 tree. 0516 tree survives testing. dbench version 4.00 - Copyright Andrew Tridgell 1999-2004 #How reproducible: always #Reproduce steps: Repeating fstests[1] generic/241, 30 times, which maybe is relative to system total ram. #bisect info Bisect point to this commit: commit d6cab70166b5bf2cbeec0c566e51725c793e3aed Merge: cb9553d 661806a Author: Stephen Rothwell <sfr(a)canb.auug.org.au> Date: Tue May 17 11:18:34 2016 +1000 Merge remote-tracking branch 'block/for-next' which is forwarding to this: commit 661806a319890962aaa839dc1dbf7ea356aa6b92 Merge: 1335822 b3a834b Author: Jens Axboe <axboe(a)fb.com> Date: Mon May 16 09:55:01 2016 -0600 Merge branch 'for-4.7/core' into for-next On top of 0517 tree, reset --hard to commit cb9553d passed testing, while reset --hard to commit d6cab70 reproduced issue. Still working on to id which commit in this merge causes this issuer, i noticed that lots of merge were going on there.... Meminfo, config, oom msg, bisect log are attached. Thanks, Xiong [1] http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/cmds/xfstests.git # Additional info meminfo after running generic/241 7~8 rounds: ------ bad -------------- [root@host linux]# free total used free shared buff/cache available Mem: 32807280 422756 25782116 9456 6602408 26044756 Swap: 10485756 0 10485756 [root@host linux]# free -g total used free shared buff/cache available Mem: 31 0 24 0 6 24 Swap: 9 0 9 [root@host linux]# git log --oneline -1 d6cab70 Merge remote-tracking branch 'block/for-next' [root@host linux]# echo 1 > /proc/sys/vm/drop_caches [root@host linux]# echo 2 > /proc/sys/vm/drop_caches [root@host linux]# echo 3 > /proc/sys/vm/drop_caches [root@host linux]# free -g total used free shared buff/cache available Mem: 31 0 23 0 6 23 Swap: 9 0 9 [root@host linux]# free total used free shared buff/cache available Mem: 32807280 419576 25050868 9456 7336836 24938336 Swap: 10485756 0 10485756 -------- good ------------ [root@host linux]# free total used free shared buff/cache available Mem: 32807280 421316 30425892 9464 1960072 31884116 Swap: 10485756 0 10485756 [root@host linux]# free -g total used free shared buff/cache available Mem: 31 0 29 0 1 30 Swap: 9 0 9 [root@host linux]# echo 1 > /proc/sys/vm/drop_caches [root@host linux]# echo 2 > /proc/sys/vm/drop_caches [root@host linux]# echo 3 > /proc/sys/vm/drop_caches [root@host linux]# free -g total used free shared buff/cache available Mem: 31 0 30 0 0 30 Swap: 9 0 9 [root@host linux]# free total used free shared buff/cache available Mem: 32807280 410820 32070196 9464 326264 31946400 Swap: 10485756 0 10485756 [root@host linux]# git log --oneline -1 cb9553d Merge remote-tracking branch 'input/next'

4 years, 8 months

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IS_ERR_VALUE misuses

by Linus Torvalds

This is just a heads-up: for some reason the acpi layer and nvdimm use the IS_ERR_VALUE() macro, and they use it incorrectly. To see warnings about it, change the macro from #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) to do a cast to a pointer and back (ie make the "(x)" part be "(unsigned long)(void *)(x)" instead, which then will cause warnings like warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] when passed an "int" argument. The reason "int" arguments are wrong is that the macro really is designed to test the upper range of a pointer value. It happens to work for signed integers too, but looking at the users, pretty much none of them are right. The ACPI and nvdimm users are all about the perfectly standard "zero for success, negative error code for failure", and so using if (IS_ERROR_VALUE(rc)) return rc; is just plain garbage. The code generally should just do if (rc) return rc; which is simpler, smaller, and generates better code. This bug seems to have been so common in the power management code that we even have a coccinelle script for it. But for some reason several uses remain in acpi_debug.c and now there are cases in drivers/nvdimm/ too. There are random various crap cases like that elsewhere too, but acpi and nvdimm were just more dense with this bug than most other places. The bug isn't fatal - as mentioned, IS_ERROR_VALUE() _does_ actually work on the range of integers that are normal errors, but it's pointless and actively misleading, and it's not meant for that use. So it just adds complexity and worse code generation for no actual gain. I noticed this when I was looking at similar idiocy in fs/gfs2, where the code in question caused warnings (for other reasons, but the main reason was "code too complex for gcc to understand it") Linus

4 years, 9 months

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[ndctl PATCH] ndctl: fix rpm source url, switch back to v$VERSION tag scheme

by Dan Williams

The way to have github generate tarballs in ndctl-$VERSION format while maintaining a v$VERSION tag scheme is to use a source url in the following format: https://github.com/pmem/%{name}/archive/v%{version}.tar.gz#/%{name}-%{ver... Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> --- git-version | 10 +++++----- ndctl.spec.in | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/git-version b/git-version index 03b44a613a57..3823ee29afaf 100755 --- a/git-version +++ b/git-version @@ -2,9 +2,9 @@ to_ver() { VN=$1 - #drop leading 'ndctl-' out of the version so its a pure number - if [ ${VN:0:6} = "ndctl-" ]; then - VN=${VN:6} + #drop leading 'v' out of the version so its a pure number + if [ ${VN:0:1} = "v" ]; then + VN=${VN:1} fi echo $VN } @@ -29,10 +29,10 @@ LF=' if test -f version; then VN=$(cat version) || VN="$DEF_VER" elif test -d ${GIT_DIR:-.git} -o -f .git && - VN=$(git describe --match "ndctl-[0-9]*" --abbrev=7 HEAD 2>/dev/null) && + VN=$(git describe --match "v[0-9]*" --abbrev=7 HEAD 2>/dev/null) && case "$VN" in *$LF*) (exit 1) ;; - ndctl-[0-9]*) + v[0-9]*) VN="$(dirty $VN)" esac; then VN=$(echo "$VN" | sed -e 's/-/./g'); diff --git a/ndctl.spec.in b/ndctl.spec.in index 221cd755e2a6..0aaef03b2e5b 100644 --- a/ndctl.spec.in +++ b/ndctl.spec.in @@ -5,7 +5,7 @@ Summary: Manage "libnvdimm" subsystem devices (Non-volatile Memory) License: GPLv2 Group: System Environment/Base Url: https://github.com/pmem/ndctl -Source0: https://github.com/pmem/ndctl/archive/ndctl-%{version}.tar.gz +Source0: https://github.com/pmem/%{name}/archive/v%{version}.tar.gz#/%{name}-%{ver... BuildRequires: autoconf BuildRequires: asciidoc

4 years, 9 months

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[ndctl PATCH] ndctl: release v53

by Dan Williams

This release incorporates the capabilities of the 4.7-rc1 kernel (most prominently in that kernel 'Device DAX', DAX error handling, and third-party DSM support). The ndctl updates include: New commands / options: bash completion for ndctl commands DIMM SMART data retrieval (ndctl list --dimms --health) ndctl destroy-namespace ndctl read-labels New tests: DAX error handling unit test (dax-errors.sh) Command fixes: ndctl list ndctl create-namespace New apis: ndctl_cmd_smart_get_alarm_flags ndctl_cmd_smart_get_flags ndctl_cmd_smart_get_health ndctl_cmd_smart_get_life_used ndctl_cmd_smart_get_shutdown_state ndctl_cmd_smart_get_spares ndctl_cmd_smart_get_temperature ndctl_cmd_smart_get_vendor_data ndctl_cmd_smart_get_vendor_size ndctl_cmd_smart_threshold_get_alarm_control ndctl_cmd_smart_threshold_get_spares ndctl_cmd_smart_threshold_get_temperature ndctl_dax_delete ndctl_dax_enable ndctl_dax_get_align ndctl_dax_get_bus ndctl_dax_get_ctx ndctl_dax_get_daxctl_region ndctl_dax_get_devname ndctl_dax_get_first ndctl_dax_get_id ndctl_dax_get_location ndctl_dax_get_namespace ndctl_dax_get_next ndctl_dax_get_region ndctl_dax_get_resource ndctl_dax_get_size ndctl_dax_get_uuid ndctl_dax_is_configured ndctl_dax_is_enabled ndctl_dax_is_valid ndctl_dax_set_align ndctl_dax_set_location ndctl_dax_set_namespace ndctl_dax_set_uuid ndctl_dimm_cmd_new_smart ndctl_dimm_cmd_new_smart_threshold ndctl_dimm_get_formatN ndctl_dimm_get_formats ndctl_dimm_get_subsystem_device ndctl_dimm_get_subsystem_revision ndctl_dimm_get_subsystem_vendor ndctl_dimm_get_unique_id ndctl_get_daxctl_ctx ndctl_namespace_get_dax ndctl_namespace_get_dax ndctl_region_get_dax_seed daxctl_dev_get_devname daxctl_dev_get_first daxctl_dev_get_id daxctl_dev_get_major daxctl_dev_get_minor daxctl_dev_get_next daxctl_dev_get_region daxctl_dev_get_size daxctl_get_log_priority daxctl_get_userdata daxctl_new daxctl_new_region daxctl_ref daxctl_region_get_ctx daxctl_region_get_id daxctl_region_get_uuid daxctl_region_ref daxctl_region_unref daxctl_region_unref daxctl_set_log_fn daxctl_set_log_priority daxctl_set_userdata daxctl_unref Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> --- Makefile.am.in | 4 ++-- git-version | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/Makefile.am.in b/Makefile.am.in index f3dc8b48c890..7f3a5b283a75 100644 --- a/Makefile.am.in +++ b/Makefile.am.in @@ -35,9 +35,9 @@ SED_PROCESS = \ -e 's,@includedir\@,$(includedir),g' \ < $< > $@ || rm $@ -LIBNDCTL_CURRENT=7 +LIBNDCTL_CURRENT=8 LIBNDCTL_REVISION=0 -LIBNDCTL_AGE=1 +LIBNDCTL_AGE=2 LIBDAXCTL_CURRENT=1 LIBDAXCTL_REVISION=0 diff --git a/git-version b/git-version index ea6e26880aea..03b44a613a57 100755 --- a/git-version +++ b/git-version @@ -19,7 +19,7 @@ dirty() { fi } -DEF_VER=52 +DEF_VER=53 LF=' '

4 years, 9 months

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[PATCH v2] libnvdimm, btt: update the usage section in Documentation

by Vishal Verma

Section 5 about BTT's in kernel usage was quite obsolete, replace it with a simple 'Usage' section that describes how to set up a BTT namespace using the 'ndctl' utility. Signed-off-by: Vishal Verma <vishal.l.verma(a)intel.com> --- Documentation/nvdimm/btt.txt | 28 +++++++++------------------- 1 file changed, 9 insertions(+), 19 deletions(-) diff --git a/Documentation/nvdimm/btt.txt b/Documentation/nvdimm/btt.txt index b91443f..e293fb6 100644 --- a/Documentation/nvdimm/btt.txt +++ b/Documentation/nvdimm/btt.txt @@ -256,28 +256,18 @@ If any of these error conditions are encountered, the arena is put into a read only state using a flag in the info block. -5. In-kernel usage -================== +5. Usage +======== -Any block driver that supports byte granularity IO to the storage may register -with the BTT. It will have to provide the rw_bytes interface in its -block_device_operations struct: +The BTT can be set up on any disk (namespace) exposed by the libnvdimm subsystem +(pmem, or blk mode). The easiest way to set up such a namespace is using the +'ndctl' utility [1]: - int (*rw_bytes)(struct gendisk *, void *, size_t, off_t, int rw); +For example, the ndctl command line to setup a btt with a 4k sector size is: -It may register with the BTT after it adds its own gendisk, using btt_init: + ndctl create-namespace -f -e namespace0.0 -m sector -l 4k - struct btt *btt_init(struct gendisk *disk, unsigned long long rawsize, - u32 lbasize, u8 uuid[], int maxlane); +See ndctl create-namespace --help for more options. -note that maxlane is the maximum amount of concurrency the driver wishes to -allow the BTT to use. - -The BTT 'disk' appears as a stacked block device that grabs the underlying block -device in the O_EXCL mode. - -When the driver wishes to remove the backing disk, it should similarly call -btt_fini using the same struct btt* handle that was provided to it by btt_init. - - void btt_fini(struct btt *btt); +[1]: https://github.com/pmem/ndctl -- 2.5.5

4 years, 9 months

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[PATCH] libnvdimm, btt: update the usage section in Documentation

by Vishal Verma

Section 5 about BTT's in kernel usage was quite obsolete, replace it with a simple 'Usage' section that describes how to set up a BTT namespace using the 'ndctl' utility. Signed-off-by: Vishal Verma <vishal.l.verma(a)intel.com> --- Documentation/nvdimm/btt.txt | 28 +++++++++------------------- 1 file changed, 9 insertions(+), 19 deletions(-) diff --git a/Documentation/nvdimm/btt.txt b/Documentation/nvdimm/btt.txt index b91443f..e9d4881 100644 --- a/Documentation/nvdimm/btt.txt +++ b/Documentation/nvdimm/btt.txt @@ -256,28 +256,18 @@ If any of these error conditions are encountered, the arena is put into a read only state using a flag in the info block. -5. In-kernel usage -================== +5. Usage +======== -Any block driver that supports byte granularity IO to the storage may register -with the BTT. It will have to provide the rw_bytes interface in its -block_device_operations struct: +The BTT can be set up on any disk (namespace) exposed by the libnvdimm subsystem +(pmem, or blk mode). The easiest way to set up such a namespace is using the +'ndctl' utility [1]: - int (*rw_bytes)(struct gendisk *, void *, size_t, off_t, int rw); +Then the ndctl command line to setup a btt with a 4k sector size is: -It may register with the BTT after it adds its own gendisk, using btt_init: + ndctl create-namespace -f -e namespace0.0 -m sector -l 4k - struct btt *btt_init(struct gendisk *disk, unsigned long long rawsize, - u32 lbasize, u8 uuid[], int maxlane); +See ndctl create-namespace --help for more options. -note that maxlane is the maximum amount of concurrency the driver wishes to -allow the BTT to use. - -The BTT 'disk' appears as a stacked block device that grabs the underlying block -device in the O_EXCL mode. - -When the driver wishes to remove the backing disk, it should similarly call -btt_fini using the same struct btt* handle that was provided to it by btt_init. - - void btt_fini(struct btt *btt); +[1]: https://github.com/pmem/ndctl -- 2.5.5

4 years, 9 months

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[GIT PULL] dax-locking for 4.7

by Ross Zwisler

Hi Linus, please pull from git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/dax-locking-for-4.7 ... to receive filesystem DAX locking changes for v4.7. These current version of these changes have been under review and test for a few weeks, and have appeared in the two most recent linux-next releases (next-20160520 and next-20160524). I've reviewed all of the DAX changes in these patches, and Neil Brown has reviewed the patch that introduced the actual locking and wait queues. This pull request is dependent on Vishal Verma's "dax-misc for 4.7" pull request. The following changes since commit 40543f62cbdce42633e3fe10923099feee272e1f: dax: fix a comment in dax_zero_page_range and dax_truncate_page (2016-05-18 12:16:58 -0600) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/dax-locking-for-4.7 for you to fetch changes up to 4d9a2c8746671efbb0c27d3ae28c7474597a7aad: dax: Remove i_mmap_lock protection (2016-05-19 15:28:40 -0600) ---------------------------------------------------------------- Filesystem DAX locking for 4.7 - We use a bit in an exceptional radix tree entry as a lock bit and use it similarly to how page lock is used for normal faults. This fixes races between hole instantiation and read faults of the same index. - Filesystem DAX PMD faults are disabled, and will be re-enabled when PMD locking is implemented. ---------------------------------------------------------------- Jan Kara (7): dax: Fix condition for filling of PMD holes dax: Make huge page handling depend of CONFIG_BROKEN dax: Define DAX lock bit for radix tree exceptional entry dax: Allow DAX code to replace exceptional entries dax: New fault locking dax: Use radix tree entry lock to protect cow faults dax: Remove i_mmap_lock protection fs/Kconfig | 1 + fs/dax.c | 592 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------- include/linux/dax.h | 16 ++- include/linux/mm.h | 7 ++ mm/filemap.c | 30 +++-- mm/memory.c | 40 +++---- mm/truncate.c | 62 +++++----- 7 files changed, 513 insertions(+), 235 deletions(-)

4 years, 9 months

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[ndctl PATCH] ndctl, list: display named devices by default

by Dan Williams

Instead of being silent when no list options are specified, default to list the device if it is the only parameter specified. For example, before: # ndctl list -d nmem0 # ...after: # ndctl list -d nmem0 { "dev":"nmem0", "id":"cdab-ffffffff" } # ...in other words omit the need for --dimms to be specified for this case. Reported-by: Vishal Verma <vishal.l.verma(a)intel.com> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> --- ndctl/builtin-list.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/ndctl/builtin-list.c b/ndctl/builtin-list.c index 2080337252c8..5c5dc5a5db5b 100644 --- a/ndctl/builtin-list.c +++ b/ndctl/builtin-list.c @@ -179,6 +179,11 @@ static struct json_object *region_to_json(struct ndctl_region *region) return NULL; } +static int num_list_flags(void) +{ + return list.buses + list.dimms + list.regions + list.namespaces; +} + int cmd_list(int argc, const char **argv) { const struct option options[] = { @@ -212,9 +217,6 @@ int cmd_list(int argc, const char **argv) unsigned int type = 0; int i, rc; - if (argc == 1) - list.namespaces = true; - argc = parse_options(argc, argv, options, u, 0); for (i = 0; i < argc; i++) error("unknown parameter \"%s\"\n", argv[i]); @@ -228,6 +230,15 @@ int cmd_list(int argc, const char **argv) if (argc) usage_with_options(u, options); + if (num_list_flags() == 0) { + list.buses = !!param.bus; + list.regions = !!param.region; + list.dimms = !!param.dimm; + } + + if (num_list_flags() == 0) + list.namespaces = true; + if (param.type) { if (strcmp(param.type, "pmem") == 0) type = ND_DEVICE_REGION_PMEM;

4 years, 9 months

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Linux-nvdimm May 2016