diff options
| author | Xavi Hernandez <xhernandez@redhat.com> | 2020-05-12 23:54:54 +0200 |
|---|---|---|
| committer | Amar Tumballi <amar@kadalu.io> | 2020-06-04 07:34:39 +0000 |
| commit | d405498e377754e5465c5c8e849b9df4deb65c49 (patch) | |
| tree | 4c6223b31e20b4c7b1047abbd96cf06c772d548e /libglusterfs/src/libglusterfs.sym | |
| parent | cab995fd9a66083a7b8f591105f3a6d550571496 (diff) | |
open-behind: rewrite of internal logic
There was a critical flaw in the previous implementation of open-behind.
When an open is done in the background, it's necessary to take a
reference on the fd_t object because once we "fake" the open answer,
the fd could be destroyed. However as long as there's a reference,
the release function won't be called. So, if the application closes
the file descriptor without having actually opened it, there will
always remain at least 1 reference, causing a leak.
To avoid this problem, the previous implementation didn't take a
reference on the fd_t, so there were races where the fd could be
destroyed while it was still in use.
To fix this, I've implemented a new xlator cbk that gets called from
fuse when the application closes a file descriptor.
The whole logic of handling background opens have been simplified and
it's more efficient now. Only if the fop needs to be delayed until an
open completes, a stub is created. Otherwise no memory allocations are
needed.
Correctly handling the close request while the open is still pending
has added a bit of complexity, but overall normal operation is simpler.
Change-Id: I6376a5491368e0e1c283cc452849032636261592
Fixes: #1225
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
Diffstat (limited to 'libglusterfs/src/libglusterfs.sym')
| -rw-r--r-- | libglusterfs/src/libglusterfs.sym | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libglusterfs/src/libglusterfs.sym b/libglusterfs/src/libglusterfs.sym index f5e273e4ca0..c80b892df25 100644 --- a/libglusterfs/src/libglusterfs.sym +++ b/libglusterfs/src/libglusterfs.sym @@ -451,6 +451,7 @@ gf_event_unregister_close fd_anonymous fd_anonymous_with_flags fd_bind +fd_close fd_create fd_create_uint64 __fd_ctx_del |