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Pavel Machek c91192d66d nbd: do not allow two clients at the same time 
Two nbd-clients at same time are bad idea, and cause WARN_ON from nbd in
2.6.28-rc7 from sysfs_add_one.  This simply prevents that from happening.

To reproduce:

 cat /dev/zero | head -c 10000000 > /tmp/delme.fstest.fs
 nbd-server 9100 -l /anyone.can.connect > /tmp/delme.fstest.fs &
 sleep 1
 nbd-client localhost 9100 /dev/nd0 &
 nbd-client localhost 9100 /dev/nd0 &

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-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>
2009-01-15 16:39:38 -08:00
..
accessibility
acpi Merge branch 'drivers-platform' into release 2009-01-09 04:56:56 -05:00
amba [ARM] Fix realview build 2009-01-08 16:29:41 +00:00
ata pata_it821x: Update RDC UDMA handling 2009-01-13 10:35:01 -05:00
atm generic swap(): iphase: rename swap() to swap_byte_order() 2009-01-08 08:31:14 -08:00
auxdisplay
base Revert "driver core: create a private portion of struct device" 2009-01-09 15:06:12 -08:00
block nbd: do not allow two clients at the same time 2009-01-15 16:39:38 -08:00
bluetooth
cdrom
char synclink_gt: enable RI interrupt 2009-01-15 16:39:37 -08:00
clocksource
connector
cpufreq Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-10 06:12:18 -08:00
cpuidle
crypto
dca
dio m68k: dio - Kill resource_size_t format warnings 2009-01-12 20:56:42 +01:00
dma
edac
eisa
firewire firewire: core: fix sleep in atomic context due to driver core change 2009-01-09 23:22:32 +01:00
firmware Make various things static 2009-01-08 08:31:15 -08:00
gpio gpio: fix probe() error return in gpio driver probes 2009-01-15 16:39:35 -08:00
gpu trivial: replace last usages of __FUNCTION__ in kernel 2009-01-07 15:48:54 -08:00
hid Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2009-01-07 15:37:24 -08:00
hwmon LIS3LV02D: separate the core from HP ACPI API 2009-01-09 16:54:42 -08:00
i2c powerpc/83xx: Move mcu_mpc8349emitx driver out of drivers/i2c/chips/ 2009-01-13 17:46:31 -06:00
ide ide: fix suspend regression 2009-01-14 19:19:04 +01:00
idle
ieee1394 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-01-08 11:05:59 -08:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2009-01-13 08:19:42 -08:00
input input: PCF50633 input driver 2009-01-11 01:34:25 +01:00
isdn Fix small typo 2009-01-11 18:36:30 +01:00
leds leds: ledtrig-timer - on deactivation hardware blinking should be disabled 2009-01-08 20:58:01 +00:00
lguest
macintosh Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-01-07 11:31:52 -08:00
mca
md md: don't retry recovery of raid1 that fails due to error on source drive. 2009-01-09 08:31:11 +11:00
media Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-01-08 11:05:59 -08:00
memstick memstick: annotate endianness of attribute structs 2009-01-09 16:54:41 -08:00
message Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-01-08 16:27:31 -08:00
mfd Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-01-13 14:52:35 -08:00
misc sgi-xp: eliminate false detection of no heartbeat 2009-01-15 16:39:37 -08:00
mmc Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2009-01-09 11:52:14 -08:00
mtd Merge git://git.infradead.org/mtd-2.6 2009-01-09 12:37:15 -08:00
net hso serial throttled tty kref fix. 2009-01-15 12:48:36 -08:00
nubus
of drivers/of: Add the of_find_i2c_device_by_node function. 2009-01-09 15:49:06 -07:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile 2009-01-09 12:43:06 -08:00
parisc fix early_serial_setup() regression 2009-01-13 14:03:43 -08:00
parport
pci [CVE-2009-0029] System call wrappers part 26 2009-01-14 14:15:29 +01:00
pcmcia powerpc: Change u64/s64 to a long long integer type 2009-01-13 14:47:59 +11:00
platform hp-wmi: handle rfkill_register() failure 2009-01-09 16:54:41 -08:00
pnp Merge branch 'linus' into release 2009-01-09 03:39:43 -05:00
power power_supply: PCF50633 battery charger driver 2009-01-11 01:34:24 +01:00
ps3
rapidio
regulator regulator: PCF50633 pmic driver 2009-01-11 01:34:25 +01:00
rtc rtc: rtc-twl4030 don't mask alarm interrupts on shutdown 2009-01-15 16:39:36 -08:00
s390 qeth: fix usage of netdev_ops 2009-01-11 00:05:16 -08:00
sbus
scsi powerpc: Change u64/s64 to a long long integer type 2009-01-13 14:47:59 +11:00
serial atmel_serial: fix flow control bug 2009-01-15 16:39:35 -08:00
sh
sn
spi atmel_spi: allow transfer when max_speed_hz = 0 2009-01-15 16:39:35 -08:00
ssb
staging Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2009-01-07 17:22:04 -08:00
tc
telephony
thermal
uio
usb ftdi_sio: fix kref leak 2009-01-15 12:48:36 -08:00
uwb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-01-08 11:05:59 -08:00
video video/framebuffer: fix bug: jpegview cannot work on framebuffer device other than 16BPP 2009-01-15 16:39:35 -08:00
virtio
w1 w1: send status messages after command processing 2009-01-08 08:31:14 -08:00
watchdog [WATCHDOG] Pika Warp appliance watchdog timer 2009-01-12 20:08:56 +00:00
xen xen: add xenfs to allow usermode <-> Xen interaction 2009-01-08 08:30:59 -08:00
zorro m68k: zorro - Use %pR to print resources 2009-01-12 20:56:43 +01:00
Kconfig
Makefile Merge branch 'drivers-platform' into release 2009-01-09 04:56:56 -05:00