David Howells b08968f196 cachefiles: Fix incorrect length to fallocate() ... When cachefiles_shorten_object() calls fallocate() to shape the cache file to match the DIO size, it passes the total file size it wants to achieve, not the amount of zeros that should be inserted. Since this is meant to preallocate that amount of storage for the file, it can cause the cache to fill up the disk and hit ENOSPC. Fix this by passing the length actually required to go from the current EOF to the desired EOF. Fixes: 7623ed6772 ("cachefiles: Implement cookie resize for truncate") Reported-by: Jeffle Xu <jefflexu@linux.alibaba.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/164630854858.3665356.17419701804248490708.stgit@warthog.procyon.org.uk # v1 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2022-03-03 11:35:21 -08:00
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cache.c	cachefiles: Check that the backing filesystem supports tmpfiles	2022-01-21 21:36:28 +00:00
daemon.c	cachefiles: set default tag name if it's unspecified	2022-01-21 21:36:28 +00:00
error_inject.c	cachefiles: Add some error injection support	2022-01-07 13:40:56 +00:00
interface.c	cachefiles: Fix incorrect length to fallocate()	2022-03-03 11:35:21 -08:00
internal.h	cachefiles: Calculate the blockshift in terms of bytes, not pages	2022-01-21 21:36:28 +00:00
io.c	netfs, cachefiles: Add a method to query presence of data in the cache	2022-02-01 10:29:18 -06:00
Kconfig	cachefiles: Add some error injection support	2022-01-07 13:40:56 +00:00
key.c	cachefiles: Implement key to filename encoding	2022-01-07 13:42:16 +00:00
main.c	cachefiles: Implement object lifecycle funcs	2022-01-07 13:42:08 +00:00
Makefile	cachefiles: Implement begin and end I/O operation	2022-01-07 13:42:44 +00:00
namei.c	cachefiles: Trace active-mark failure	2022-01-21 21:36:28 +00:00
security.c	cachefiles: Add security derivation	2022-01-07 13:41:14 +00:00
volume.c	fscache, cachefiles: Store the volume coherency data	2022-01-07 13:43:03 +00:00
xattr.c	fscache, cachefiles: Store the volume coherency data	2022-01-07 13:43:03 +00:00