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Paul Clements 4d48a542b4 nbd: fix I/O hang on disconnected nbds ... Fix a problem that causes I/O to a disconnected (or partially initialized) nbd device to hang indefinitely. To reproduce: # ioctl NBD_SET_SIZE_BLOCKS /dev/nbd23 514048 # dd if=/dev/nbd23 of=/dev/null bs=4096 count=1 ...hangs... This can also occur when an nbd device loses its nbd-client/server connection. Although we clear the queue of any outstanding I/Os after the client/server connection fails, any additional I/Os that get queued later will hang. This bug may also be the problem reported in this bug report: http://bugzilla.kernel.org/show_bug.cgi?id=12277 Testing would need to be performed to determine if the two issues are the same. This problem was introduced by the new request handling thread code ("NBD: allow nbd to be used locally", 3/2008), which entered into mainline around 2.6.25. The fix, which is fairly simple, is to restore the check for lo->sock being NULL in do_nbd_request. This causes I/O to an uninitialized nbd to immediately fail with an I/O error, as it did prior to the introduction of this bug. Signed-off-by: Paul Clements <paul.clements@steeleye.com> Reported-by: Jon Nelson <jnelson-kernel-bugzilla@jamponi.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: <stable@kernel.org> [2.6.26.x, 2.6.27.x, 2.6.28.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		16 years ago
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aoe	aoe: remove private mac address format function	16 years ago
paride	…
DAC960.c	…
DAC960.h	…
Kconfig	Create/use more directory structure in the Documentation/ tree.	16 years ago
Makefile	…
amiflop.c	m68k: amiflop - Get rid of sleep_on calls	16 years ago
ataflop.c	…
brd.c	…
cciss.c	cciss: simplify parameters to deregister_disk function	16 years ago
cciss.h	cciss: switch to using hlist for command list management	16 years ago
cciss_cmd.h	cciss: switch to using hlist for command list management	16 years ago
cciss_scsi.c	…
cciss_scsi.h	…
cpqarray.c	cpqarry: fix return value of cpqarray_init()	16 years ago
cpqarray.h	…
cryptoloop.c	…
floppy.c	Create/use more directory structure in the Documentation/ tree.	16 years ago
hd.c	…
ida_cmd.h	…
ida_ioctl.h	…
loop.c	loop: Do not call loop_unplug for not configured loop device.	16 years ago
nbd.c	nbd: fix I/O hang on disconnected nbds	16 years ago
pktcdvd.c	pktcdvd: remove broken dev_t export of class devices	16 years ago
ps3disk.c	powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/block	16 years ago
smart1,2.h	…
sunvdc.c	sparc64: Fix unsigned long long warnings in drivers.	16 years ago
swim3.c	…
sx8.c	…
ub.c	USB: change interface to usb_lock_device_for_reset()	16 years ago
umem.c	…
umem.h	…
viodasd.c	…
virtio_blk.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus	16 years ago
xd.c	[PATCH] switch xd	17 years ago
xd.h	[PATCH] switch xd	17 years ago
xen-blkfront.c	xen-blkfront: set queue paravirt flag	16 years ago
xsysace.c	powerpc/xsysace: add compatible string for non-ipcore instance	16 years ago
z2ram.c	[PATCH] switch z2ram	17 years ago