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12102436ac
linux-next/drivers
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Jacob Keller 12102436ac devlink: track snapshot id usage count using an xarray 
Each snapshot created for a devlink region must have an id. These ids
are supposed to be unique per "event" that caused the snapshot to be
created. Drivers call devlink_region_snapshot_id_get to obtain a new id
to use for a new event trigger. The id values are tracked per devlink,
so that the same id number can be used if a triggering event creates
multiple snapshots on different regions.

There is no mechanism for snapshot ids to ever be reused. Introduce an
xarray to store the count of how many snapshots are using a given id,
replacing the snapshot_id field previously used for picking the next id.

The devlink_region_snapshot_id_get() function will use xa_alloc to
insert an initial value of 1 value at an available slot between 0 and
U32_MAX.

The new __devlink_snapshot_id_increment() and
__devlink_snapshot_id_decrement() functions will be used to track how
many snapshots currently use an id.

Drivers must now call devlink_snapshot_id_put() in order to release
their reference of the snapshot id after adding region snapshots.

By tracking the total number of snapshots using a given id, it is
possible for the decrement() function to erase the id from the xarray
when it is not in use.

With this method, a snapshot id can become reused again once all
snapshots that referred to it have been deleted via
DEVLINK_CMD_REGION_DEL, and the driver has finished adding snapshots.

This work also paves the way to introduce a mechanism for userspace to
request a snapshot.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-26 19:39:26 -07:00
..
accessibility
acpi x86/mm: split vmalloc_sync_all() 2020-03-21 18:56:06 -07:00
amba
android binderfs: use refcount for binder control devices too 2020-03-11 19:33:52 +01:00
ata libata-5.6-2020-02-05 2020-02-06 06:11:50 +00:00
atm atm: nicstar: fix if-statement empty body warning 2020-02-29 21:28:30 -08:00
auxdisplay auxdisplay: charlcd: replace zero-length array with flexible-array member 2020-03-06 22:18:07 +01:00
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-12 22:34:48 -07:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-01-28 16:02:33 -08:00
block virtio: fixes 2020-03-09 16:02:32 -07:00
bluetooth Bluetooth: btusb: print Intel fw build version in power-on boot 2020-03-16 08:57:40 +01:00
bus Few fixes for omaps for v5.6-rc cycle 2020-02-29 11:47:44 -08:00
cdrom scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places 2020-02-24 15:06:07 -05:00
char ipmi_si: Avoid spurious errors for optional IRQs 2020-03-11 21:15:19 -05:00
clk clk: qcom: dispcc: Remove support of disp_cc_mdss_rscc_ahb_clk 2020-02-12 15:03:08 -08:00
clocksource ARM: SoC: late updates 2020-02-08 14:17:27 -08:00
connector
counter
cpufreq cpufreq: Fix policy initialization for internal governor drivers 2020-02-27 08:57:48 +01:00
cpuidle ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
crypto Crypto/chtls: add/delete TLS header in driver 2020-03-23 13:04:48 -07:00
dax dax: Get rid of fs_dax_get_by_host() helper 2020-01-16 09:52:27 -08:00
dca
devfreq Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs" 2020-02-24 11:14:29 +09:00
dio
dma dmaengine: ti: k3-udma-glue: Fix an error handling path in 'k3_udma_glue_cfg_rx_flow()' 2020-03-23 11:48:34 +05:30
dma-buf dma-buf: free dmabuf->name in dma_buf_release() 2020-02-27 18:01:58 +05:30
edac EDAC/synopsys: Do not print an error with back-to-back snprintf() calls 2020-02-27 16:44:25 +01:00
eisa
extcon
firewire remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
firmware Two EFI fixes: 2020-03-15 12:42:03 -07:00
fpga fpga: xilinx-pr-decoupler: Remove clk_get error message for probe defer 2020-01-10 12:51:56 -08:00
fsi fsi: aspeed: add unspecified HAS_IOMEM dependency 2020-02-10 13:45:49 -08:00
gnss
gpio gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model 2020-03-24 10:06:54 +01:00
gpu drm/i915 fixes for v5.6-rc7: 2020-03-20 12:52:35 +10:00
greybus
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2020-03-17 09:38:03 -07:00
hsi
hv - Most of the commits here are work to enable host-initiated hibernation 2020-02-03 14:42:03 +00:00
hwmon hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT() 2020-03-03 12:42:55 -08:00
hwspinlock hwspinlock: sirf: Use devm_hwspin_lock_register() to register hwlock controller 2020-01-21 16:16:36 -08:00
hwtracing intel_th: pci: Add Elkhart Lake CPU support 2020-03-18 11:32:56 +01:00
i2c i2c: acpi: put device when verifying client fails 2020-03-13 15:15:30 +01:00
i3c i3c: master: dw: reattach device on first available location of address table 2020-01-13 10:00:05 +01:00
ide scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places 2020-02-24 15:06:07 -05:00
idle intel_idle: Introduce 'states_off' module parameter 2020-02-03 11:57:18 +01:00
iio First set of IIO fixes in the 5.6 cycle. 2020-03-18 11:20:42 +01:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-12 22:34:48 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2020-02-15 16:49:25 -08:00
interconnect interconnect: Handle memory allocation errors 2020-03-03 08:02:57 +01:00
iommu iommu/vt-d: Populate debugfs if IOMMUs are detected 2020-03-14 20:02:43 +01:00
ipack remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
irqchip irqchip fixes for 5.6, take #2 2020-03-15 10:53:11 +01:00
isdn proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
leds leds: lm3532: add pointer to documentation and fix typo 2020-01-22 21:08:24 +01:00
lightnvm
macintosh macintosh: windfarm: fix MODINFO regression 2020-03-10 12:30:59 +01:00
mailbox mailbox: armada-37xx-rwtm: convert to devm_platform_ioremap_resource 2020-01-08 10:41:52 +01:00
mcb
md block-5.6-2020-03-07 2020-03-07 14:14:38 -06:00
media media: mc-entity.c: use & to check pad flags, not == 2020-02-24 15:10:04 +01:00
memory mvebu drivers for 5.6 (part 1) 2020-01-16 10:45:44 -08:00
memstick
message Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2020-01-19 22:10:04 +01:00
mfd chrome platform changes for 5.6 2020-02-04 07:17:41 +00:00
misc mmc: rtsx_pci: Fix support for speed-modes that relies on tuning 2020-03-18 11:55:02 +01:00
mmc mmc: rtsx_pci: Fix support for speed-modes that relies on tuning 2020-03-18 11:55:02 +01:00
mtd treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
mux
net devlink: track snapshot id usage count using an xarray 2020-03-26 19:39:26 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-25 18:58:11 -07:00
ntb
nubus
nvdimm mm: Cleanup __put_devmap_managed_page() vs ->page_free() 2020-01-31 10:30:37 -08:00
nvme nvmet-tcp: set MSG_MORE only if we actually have more to send 2020-03-21 04:37:53 +09:00
nvmem Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2020-02-07 12:54:13 -08:00
of drivers/of/of_mdio.c:fix of_mdiobus_register() 2020-03-03 19:01:51 -08:00
opp ioremap changes for 5.6 2020-01-27 13:03:00 -08:00
oprofile tracing: Make struct ring_buffer less ambiguous 2020-01-13 13:19:38 -05:00
parisc proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
parport
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-12 22:34:48 -07:00
pcmcia
perf drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer 2020-03-02 12:07:35 +00:00
phy phy: for 5.6-rc 2020-03-04 13:28:52 +01:00
pinctrl pinctrl: qcom: Assign irq_eoi conditionally 2020-03-09 16:31:34 +01:00
platform platform/chrome: wilco_ec: Include asm/unaligned instead of linux/ path 2020-02-11 09:10:36 +01:00
pnp proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
power ARM: SoC platform updates 2020-02-08 13:55:25 -08:00
powercap Merge back power capping changes for v5.6. 2020-01-13 10:32:19 +01:00
pps
ps3
ptp ptp: add VMware virtual PTP clock driver 2020-03-05 17:25:07 -08:00
pwm pwm: Remove set but not set variable 'pwm' 2020-01-20 15:40:49 +01:00
rapidio
ras
regulator regulator: Fixes for v5.6 2020-03-06 14:48:30 -06:00
remoteproc remoteproc: clean up notification config 2020-03-16 17:31:51 -07:00
reset reset: intel: add unspecified HAS_IOMEM dependency 2020-02-10 11:11:55 +01:00
rpmsg rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
rtc rtc: max8907: add missing select REGMAP_IRQ 2020-03-19 09:55:25 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-25 18:58:11 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-25 18:58:11 -07:00
sfi
sh remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
siox siox: Use the correct style for SPDX License Identifier 2020-01-14 21:46:53 +01:00
slimbus slimbus: ngd: add v2.1.0 compatible 2020-03-12 16:51:15 +01:00
soc i.MX fixes for 5.6: 2020-02-24 09:57:05 -08:00
soundwire soundwire: cadence: fix kernel-doc parameter descriptions 2020-01-16 17:34:38 +05:30
spi spi: Fixes for v5.6 2020-03-06 14:50:16 -06:00
spmi spmi: pmic-arb: Set lockdep class for hierarchical irq domains 2020-02-10 13:16:04 +01:00
ssb ssb: Use scnprintf() for avoiding potential buffer overflow 2020-03-12 15:44:12 +02:00
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-03-25 18:58:11 -07:00
target scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session" 2020-02-14 17:13:54 -05:00
tc The main MIPS changes for 5.6: 2020-01-31 11:28:31 -08:00
tee arm64: dts: agilex: fix gmac compatible 2020-03-03 16:40:56 -08:00
thermal - Fix a SEVERE docs build failure for cpu idle cooling device (Randy Dunlap) 2020-01-31 14:39:21 -08:00
thunderbolt thunderbolt: Fix error code in tb_port_is_width_supported() 2020-03-04 12:34:17 +03:00
tty tty: fix compat TIOCGSERIAL checking wrong function ptr 2020-03-18 13:15:13 +01:00
uio uio: uio_pdrv_genirq: Do not log an error when deferring probe routine. 2020-01-14 15:27:51 +01:00
usb USB-serial fixes for 5.6-rc7 2020-03-18 10:42:57 +01:00
vfio VFIO updates for v5.6-rc1 2020-02-03 22:22:05 +00:00
vhost vhost: Check docket sk_family instead of call getname 2020-02-22 21:41:42 -08:00
video ARM: SoC fixes 2020-03-08 17:36:22 -07:00
virt
virtio virtio_balloon: Adjust label in virtballoon_probe 2020-03-08 05:35:24 -04:00
visorbus visorbus: fix uninitialized variable access 2020-01-14 15:30:35 +01:00
vlynq
vme Char/Misc driver changes for 5.6-rc1 2020-01-29 10:35:54 -08:00
w1 Char/Misc driver changes for 5.6-rc1 2020-01-29 10:35:54 -08:00
watchdog watchdog: iTCO_wdt: Make ICH_RES_IO_SMI optional 2020-03-10 10:20:37 +01:00
xen xen/xenbus: fix locking 2020-03-05 09:42:23 -06:00
zorro Kbuild updates for v5.6 (2nd) 2020-02-09 16:05:50 -08:00
Kconfig
Makefile thunderbolt: Update Kconfig entries to USB4 2019-12-18 15:39:18 +01:00