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7fdfd4065c
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Paul Clements 7fdfd4065c NBD: allow hung network I/O to be cancelled 
Allow NBD I/O to be cancelled when a network outage occurs.  Previously, I/O
would just hang, and if enough I/O was hung in nbd, the system (at least
user-level) would completely hang until a TCP timeout (default, 15 minutes)
occurred.

The patch introduces a new ioctl NBD_SET_TIMEOUT that allows a transmit
timeout value (in seconds) to be specified.  Any network send that exceeds the
timeout will be cancelled and the nbd connection will be shut down.  I've
tested with various timeout values and 6 seconds seems to be a good choice for
the timeout.  If the NBD_SET_TIMEOUT ioctl is not called, you get the old (I/O
hang) behavior.

Signed-off-by: Paul Clements <paul.clements@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:55 -07:00
..
acorn/char unicode diacritics support 2007-10-17 08:42:52 -07:00
acpi more trivial signedness fixes in drivers 2007-10-14 12:41:52 -07:00
amba Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ata Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block 2007-10-16 10:09:16 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-10-16 11:23:06 -07:00
auxdisplay
base mm: add node states sysfs class attributeS 2007-10-16 09:43:03 -07:00
block NBD: allow hung network I/O to be cancelled 2007-10-17 08:42:55 -07:00
bluetooth
cdrom [POWERPC] iSeries: Move detection of virtual cdroms 2007-10-11 20:40:47 +10:00
char mxser: Remove use of dead TTY_FLIPBUF_SIZE definition 2007-10-17 08:42:52 -07:00
clocksource
connector [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
cpufreq Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
crypto [CRYPTO] sha: Add header file for SHA definitions 2007-10-10 16:55:50 -07:00
dca I/OAT: Add DCA services 2007-10-16 09:43:09 -07:00
dio
dma Remove "unsafe" from module struct 2007-10-17 08:42:49 -07:00
edac Drivers: clean up direct setting of the name of a kset 2007-10-12 14:51:02 -07:00
eisa signedness: module_param_array nump argument 2007-10-14 12:41:52 -07:00
fc4 Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-10-15 08:19:33 -07:00
firewire firewire: fw-cdev: reorder wakeup vs. spinlock 2007-10-17 00:00:10 +02:00
firmware Driver core: rename ktype_edd and ktype_efivar 2007-10-12 14:51:12 -07:00
hid HID: fix HIDIOCGRDESC memory access in hidraw 2007-10-15 08:12:00 -07:00
hwmon Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2007-10-15 13:41:39 -07:00
i2c Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-10-15 16:08:50 -07:00
ide amd74xx: remove /proc/ide/amd74xx 2007-10-16 22:29:58 +02:00
ieee1394 ieee1394: ieee1394_core.c: use DEFINE_SPINLOCK for spinlock definition 2007-10-16 23:59:59 +02:00
infiniband infiniband: sg chaining support 2007-10-16 11:20:59 +02:00
input Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-10-16 11:23:06 -07:00
isdn isdn: guard against a potential NULL pointer dereference in old_capi_manufacturer() 2007-10-16 09:43:10 -07:00
kvm sched: guest CPU accounting: maintain guest state in KVM 2007-10-15 17:00:19 +02:00
leds Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2007-10-16 11:23:06 -07:00
lguest
macintosh fix adbhid mismerge 2007-10-16 19:04:49 -07:00
mca
md Fix memory leak in dm-crypt 2007-10-16 13:48:46 +02:00
media [ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz 2007-10-16 16:51:18 +02:00
message Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block 2007-10-16 10:09:16 -07:00
mfd
misc Driver for the Atmel on-chip SSC on AT32AP and AT91 2007-10-17 08:42:47 -07:00
mmc missing include in mmc 2007-10-16 19:05:30 -07:00
mtd Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
net WOL bugfix for 3c59x.c 2007-10-16 21:10:29 -04:00
nubus
of
oprofile
parisc [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
parport
pci Get rid of unused variable warning in drivers/pci/hotplug/pci_hotplug_core.c 2007-10-15 09:07:58 -07:00
pcmcia pcmcia: CompactFlash driver for PA Semi Electra boards 2007-10-17 08:42:48 -07:00
pnp pnp: avoid a small unlikely memory leak in proc_read_escd() 2007-10-17 08:42:51 -07:00
power Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ps3 ps3fb: default to 480p on DVI-D/HDMI if video=safe 2007-10-16 09:43:22 -07:00
rapidio
rtc rtc: allow validated RTC_PIE_ON for non-root 2007-10-16 09:43:13 -07:00
s390 unicode diacritics support 2007-10-17 08:42:52 -07:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block 2007-10-16 10:09:16 -07:00
serial jsm: Remove further unneeded crud 2007-10-17 08:42:52 -07:00
sh
sn
spi spi doesn't need class_device 2007-10-16 09:43:10 -07:00
ssb missing include in ssb 2007-10-14 08:53:33 -07:00
tc unicode diacritics support 2007-10-17 08:42:52 -07:00
telephony kconfig: syntax cleanup - drop support for "depends/requires/def_boolean" 2007-10-12 21:20:32 +02:00
uio
usb kill DECLARE_MUTEX_LOCKED 2007-10-17 08:42:47 -07:00
video fix cirrusfb breakage 2007-10-16 16:55:21 -07:00
w1 Clean up duplicate includes in drivers/w1/ 2007-10-17 08:42:48 -07:00
xen
zorro
Kconfig DCA: Add Direct Cache Access driver 2007-10-16 09:43:09 -07:00
Makefile DCA: Add Direct Cache Access driver 2007-10-16 09:43:09 -07:00