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0f0709e6bf
linux/drivers
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Coly Li 0f0709e6bf bcache: stop bcache device when backing device is offline 
Currently bcache does not handle backing device failure, if backing
device is offline and disconnected from system, its bcache device can still
be accessible. If the bcache device is in writeback mode, I/O requests even
can success if the requests hit on cache device. That is to say, when and
how bcache handles offline backing device is undefined.

This patch tries to handle backing device offline in a rather simple way,
- Add cached_dev->status_update_thread kernel thread to update backing
  device status in every 1 second.
- Add cached_dev->offline_seconds to record how many seconds the backing
  device is observed to be offline. If the backing device is offline for
  BACKING_DEV_OFFLINE_TIMEOUT (30) seconds, set dc->io_disable to 1 and
  call bcache_device_stop() to stop the bache device which linked to the
  offline backing device.

Now if a backing device is offline for BACKING_DEV_OFFLINE_TIMEOUT seconds,
its bcache device will be removed, then user space application writing on
it will get error immediately, and handler the device failure in time.

This patch is quite simple, does not handle more complicated situations.
Once the bcache device is stopped, users need to recovery the backing
device, register and attach it manually.

Changelog:
v3: call wait_for_kthread_stop() before exits kernel thread.
v2: remove "bcache: " prefix when calling pr_warn().
v1: initial version.

Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Michael Lyle <mlyle@lyle.org>
Cc: Junhui Tang <tang.junhui@zte.com.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-28 14:53:16 -06:00
..
accessibility
acpi ACPI fixes for 4.17-rc3 2018-04-26 11:06:36 -07:00
amba ARM: amba: Fix race condition with driver_override 2018-04-26 10:35:04 +02:00
android ANDROID: binder: prevent transactions into own process. 2018-04-23 12:12:41 +02:00
ata Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2018-04-03 17:42:25 -07:00
atm atm: iphase: fix spelling mistake: "Tansmit" -> "Transmit" 2018-04-19 13:41:49 -04:00
auxdisplay
base Driver core fixes for 4.17-rc3 2018-04-27 10:12:20 -07:00
bcma
block block drivers/block: Use octal not symbolic permissions 2018-05-24 13:38:59 -06:00
bluetooth Bluetooth: Set HCI_QUIRK_SIMULTANEOUS_DISCOVERY for BTUSB_QCA_ROME 2018-04-01 21:43:02 +03:00
bus HISI LPC: Add Kconfig MFD_CORE dependency 2018-04-26 16:53:23 +02:00
cdrom block: sanitize blk_get_request calling conventions 2018-05-14 08:55:12 -06:00
char virtio: fixups 2018-04-26 16:36:11 -07:00
clk First round of fixes for meson clocks targeted for v4.17 2018-05-01 14:44:16 -07:00
clocksource clocksource/imx-tpm: Correct -ETIME return condition check 2018-04-19 13:21:35 +02:00
connector
cpufreq cpufreq / CPPC: Set platform specific transition_delay_us 2018-04-30 10:14:08 +02:00
cpuidle cpuidle: menu: Avoid selecting shallow states with stopped tick 2018-04-09 11:54:57 +02:00
crypto .gitignore: move *-asn1.[ch] patterns to the top-level .gitignore 2018-04-07 19:04:02 +09:00
dax device-dax: allow MAP_SYNC to succeed 2018-04-19 15:11:50 -07:00
dca
devfreq
dio
dma DMAengine updates for v4.17-rc1 2018-04-10 12:14:37 -07:00
dma-buf
edac * Add NVDIMM support to EDAC (Tony Luck) 2018-04-05 14:21:13 -07:00
eisa
extcon Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
firewire
firmware firmware: arm_scmi: remove redundant null check on array 2018-04-16 10:15:58 +01:00
fmc treewide: Fix typos in printk 2018-03-27 09:51:22 +02:00
fpga fpga-manager: altera-ps-spi: preserve nCONFIG state 2018-04-23 13:27:05 +02:00
fsi
gpio DeviceTree updates for 4.17: 2018-04-05 21:03:42 -07:00
gpu Merge branch 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux into drm-fixes 2018-05-04 10:03:27 +10:00
hid HID: i2c-hid: fix inverted return value from i2c_hid_command() 2018-04-19 09:25:15 +02:00
hsi
hv ARM: 2018-04-09 11:42:31 -07:00
hwmon hwmon: (k10temp) Add support for AMD Ryzen w/ Vega graphics 2018-04-25 05:31:06 -07:00
hwspinlock
hwtracing Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
i2c i2c: sprd: Fix the i2c count issue 2018-04-27 14:12:43 +02:00
ide block: consistently use GFP_NOIO instead of __GFP_NORECLAIM 2018-05-14 08:55:18 -06:00
idle
iio This is the bulk of GPIO changes for the v4.17 kernel cycle: 2018-04-05 09:51:41 -07:00
infiniband First pull request for 4.17-rc 2018-05-04 20:51:10 -10:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-05-02 17:34:42 -10:00
iommu iommu: rockchip: fix building without CONFIG_OF 2018-05-03 16:36:07 +02:00
ipack
irqchip irqchip/qcom: Fix check for spurious interrupts 2018-05-02 15:56:10 +02:00
isdn mISDN: Remove VLAs 2018-04-12 21:46:10 -04:00
leds
lightnvm lightnvm: pblk: remove some unnecessary NULL checks 2018-03-29 17:29:09 -06:00
macintosh powerpc updates for 4.17 2018-04-07 12:08:19 -07:00
mailbox
mcb
md bcache: stop bcache device when backing device is offline 2018-05-28 14:53:16 -06:00
media MAINTAINERS & files: Canonize the e-mails I use at files 2018-05-04 06:21:06 -04:00
memory ARM: OMAP2+: Fix build when using split object directories 2018-04-18 10:07:13 -07:00
memstick memstick: remove unused variables 2018-05-14 08:31:06 -06:00
message scsi: mptsas: Disable WRITE SAME 2018-04-18 23:37:25 -04:00
mfd platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle 2018-04-10 22:25:07 -07:00
misc * Fix 2032 time access issues and new compiler warnings 2018-04-12 10:21:19 -07:00
mmc block: sanitize blk_get_request calling conventions 2018-05-14 08:55:12 -06:00
mtd mtd_blkdevs: handle highmem pages 2018-05-11 15:07:58 -06:00
mux
net qed: fix spelling mistake: "offloded" -> "offloaded" 2018-05-03 14:45:51 -04:00
nfc
ntb
nubus
nvdimm Revert "libnvdimm, of_pmem: workaround OF_NUMA=n build error" 2018-04-19 15:10:56 -07:00
nvme nvme-pci: fix race between poll and IRQ completions 2018-05-21 08:41:52 -06:00
nvmem Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
of DeviceTree fixes for 4.17: 2018-05-07 05:33:29 -10:00
opp
oprofile oprofilefs: don't oops on allocation failure 2018-03-29 15:07:48 -04:00
parisc parisc: Fix section mismatches 2018-05-02 21:47:35 +02:00
parport Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
pci pci-v4.17-fixes-1 2018-04-26 16:28:24 -07:00
pcmcia Merge branch 'for-linus-sa1100' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-04-09 09:26:36 -07:00
perf ARM: SoC driver updates for 4.17 2018-04-05 21:29:35 -07:00
phy ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
pinctrl This is the bulk of GPIO changes for the v4.17 kernel cycle: 2018-04-05 09:51:41 -07:00
platform platform/x86: Kconfig: Fix dell-laptop dependency chain. 2018-05-04 22:20:14 +02:00
pnp
power ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v4.17-rc1 2018-04-13 15:46:21 -07:00
rapidio rapidio: fix rio_dma_transfer error handling 2018-04-20 17:18:35 -07:00
ras
regulator Merge remote-tracking branches 'regulator/topic/88pg86x', 'regulator/topic/dt', 'regulator/topic/formatting' and 'regulator/topic/gpio' into regulator-next 2018-03-28 10:33:53 +08:00
remoteproc remoteproc: qcom: Fix potential device node leaks 2018-04-25 16:46:55 -07:00
reset Merge branch 'reset/lookup' into reset/next 2018-03-27 11:03:43 +02:00
rpmsg rpmsg: added MODULE_ALIAS for rpmsg_char 2018-04-25 16:46:55 -07:00
rtc rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops 2018-04-25 13:24:13 +10:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-26 10:29:46 -07:00
sbus Remove jsflash driver 2018-05-15 13:56:16 -06:00
scsi block: consistently use GFP_NOIO instead of __GFP_NORECLAIM 2018-05-14 08:55:18 -06:00
sfi
sh
siox
slimbus slimbus: Fix out-of-bounds access in slim_slicesize() 2018-04-23 13:40:15 +02:00
sn
soc soc: bcm: raspberrypi-power: Fix use of __packed 2018-04-16 15:15:23 -07:00
soundwire
spi spi: SPI updates for v4.17 2018-04-03 12:06:21 -07:00
spmi
ssb
staging media: imx-media-csi: Fix inconsistent IS_ERR and PTR_ERR 2018-05-04 06:21:06 -04:00
target block: Use bioset_init() for fs_bio_set 2018-05-14 13:16:06 -06:00
tc
tee
thermal Merge branches 'thermal-core' and 'thermal-soc' into next 2018-04-13 14:11:53 +08:00
thunderbolt
tty tty: Use __GFP_NOFAIL for tty_ldisc_get() 2018-04-25 15:03:44 +02:00
uio uio_hv_generic: fix subchannel ring mmap 2018-04-23 12:43:48 +02:00
usb USB-serial fixes for v4.17-rc4 2018-05-04 14:38:32 -07:00
uwb
vfio VFIO updates for v4.17-rc1 2018-04-06 19:44:27 -07:00
vhost vhost: return bool from *_access_ok() functions 2018-04-11 10:54:06 -04:00
video fbdev changes for v4.17: 2018-04-10 10:20:00 -07:00
virt virt: vbox: Log an error when we fail to get the host version 2018-04-23 13:41:55 +02:00
virtio virtio: feature 2018-04-11 18:58:27 -07:00
visorbus
vlynq
vme
w1
watchdog aspeed: watchdog: Set bootstatus during probe 2018-04-16 10:22:40 +02:00
xen xen: fixes and one header update for 4.17-rc2 2018-04-20 08:36:04 -07:00
zorro
Kconfig hwtracing: Add HW tracing support menu 2018-03-29 13:38:10 +03:00
Makefile