fuse: fix hang of single threaded fuseblk filesystem

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Single threaded NTFS-3G could get stuck if a delayed RELEASE reply
triggered a DESTROY request via path_put().

Fix this by

 a) making RELEASE requests synchronous, whenever possible, on fuseblk
 filesystems

 b) if not possible (triggered by an asynchronous read/write) then do
 the path_put() in a separate thread with schedule_work().

Reported-by: Oliver Neukum <oneukum@suse.de>
Cc: stable@kernel.org
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

...

This commit is contained in:

Miklos Szeredi 2011-02-25 14:44:58 +01:00

parent 4662db4461

commit 5a18ec176c

2 changed files with 50 additions and 8 deletions

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54

fs/fuse/file.c

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6

fs/fuse/fuse_i.h

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