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linux/fs/hpfs
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Mikulas Patocka b6853f78e7 hpfs: don't truncate the file when delete fails 
The delete opration can allocate additional space on the HPFS filesystem
due to btree split. The HPFS driver checks in advance if there is
available space, so that it won't corrupt the btree if we run out of space
during splitting.

If there is not enough available space, the HPFS driver attempted to
truncate the file, but this results in a deadlock since the commit
7dd29d8d86 ("HPFS: Introduce a global mutex
and lock it on every callback from VFS").

This patch removes the code that tries to truncate the file and -ENOSPC is
returned instead. If the user hits -ENOSPC on delete, he should try to
delete other files (that are stored in a leaf btree node), so that the
delete operation will make some space for deleting the file stored in
non-leaf btree node.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: stable@vger.kernel.org	# 2.6.39+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 		2016-02-27 19:15:51 -05:00
..
Kconfig HPFS: Make HPFS compile on preempt and SMP 2011-05-09 09:04:23 -07:00
Makefile
…
alloc.c hpfs: add fstrim support 2015-07-09 13:35:30 -07:00
anode.c hpfs: convert to use leXX_add_cpu() 2012-10-06 03:05:08 +09:00
buffer.c hpfs: support hotfixes 2015-09-03 11:55:30 -07:00
dentry.c Don't pass inode to ->d_hash() and ->d_compare() 2013-06-29 12:57:36 +04:00
dir.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
dnode.c fs/hpfs/dnode.c: fix suspect code indent 2014-08-08 15:57:22 -07:00
ea.c fs/hpfs: increase pr_warn level 2014-06-06 16:08:10 -07:00
file.c hpfs: support hotfixes 2015-09-03 11:55:30 -07:00
hpfs.h hpfs: assorted endianness annotations 2012-05-29 23:28:39 -04:00
hpfs_fn.h hpfs: support hotfixes 2015-09-03 11:55:30 -07:00
inode.c don't put symlink bodies in pagecache into highmem 2015-12-08 22:41:36 -05:00
map.c hpfs: missing endianness annotation 2016-01-04 10:29:03 -05:00
name.c fs/hpfs: increase pr_warn level 2014-06-06 16:08:10 -07:00
namei.c hpfs: don't truncate the file when delete fails 2016-02-27 19:15:51 -05:00
super.c kmemcg: account certain kmem allocations to memcg 2016-01-14 16:00:49 -08:00