linux/fs/dlm
Miklos Szeredi bde74e4bc6 locks: add special return value for asynchronous locks
Use a special error value FILE_LOCK_DEFERRED to mean that a locking
operation returned asynchronously.  This is returned by

  posix_lock_file() for sleeping locks to mean that the lock has been
  queued on the block list, and will be woken up when it might become
  available and needs to be retried (either fl_lmops->fl_notify() is
  called or fl_wait is woken up).

  f_op->lock() to mean either the above, or that the filesystem will
  call back with fl_lmops->fl_grant() when the result of the locking
  operation is known.  The filesystem can do this for sleeping as well
  as non-sleeping locks.

This is to make sure, that return values of -EAGAIN and -EINPROGRESS by
filesystems are not mistaken to mean an asynchronous locking.

This also makes error handling in fs/locks.c and lockd/svclock.c slightly
cleaner.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: David Teigland <teigland@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25 10:53:47 -07:00
..
ast.c dlm: proper types for asts and basts 2008-02-06 00:35:45 -06:00
ast.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
config.c configfs: Allow ->make_item() and ->make_group() to return detailed errors. 2008-07-17 15:21:29 -07:00
config.h dlm: recover nodes that are removed and re-added 2008-04-21 11:18:01 -05:00
debug_fs.c dlm: add __init and __exit marks to init and exit functions 2008-02-06 23:41:22 -06:00
dir.c dlm: fix dlm_dir_lookup() handling of too long names 2008-02-04 01:30:19 -06:00
dir.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
dlm_internal.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm 2008-04-22 13:44:23 -07:00
Kconfig menuconfig: transform NLS and DLM menus 2007-10-17 08:43:00 -07:00
lock.c dlm: save master info after failed no-queue request 2008-04-21 11:18:01 -05:00
lock.h dlm: make dlm_print_rsb() static 2008-04-21 11:18:01 -05:00
lockspace.c fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
lockspace.h [DLM] dlm: user locks 2006-07-13 09:25:34 -04:00
lowcomms.c dlm: tcp_connect_to_sock should check for -EINVAL, not EINVAL 2008-05-19 15:37:27 -05:00
lowcomms.h [DLM] Clean up lowcomms 2006-12-07 09:25:13 -05:00
lvb_table.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
main.c dlm: move plock code from gfs2 2008-04-21 11:22:28 -05:00
Makefile dlm: move plock code from gfs2 2008-04-21 11:22:28 -05:00
member.c dlm: recover nodes that are removed and re-added 2008-04-21 11:18:01 -05:00
member.h dlm: reject messages from non-members 2008-01-30 11:04:42 -06:00
memory.c dlm: add __init and __exit marks to init and exit functions 2008-02-06 23:41:22 -06:00
memory.h dlm: use dlm prefix on alloc and free functions 2008-01-29 17:17:19 -06:00
midcomms.c dlm: dlm_process_incoming_buffer() fixes 2008-02-04 01:22:42 -06:00
midcomms.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
netlink.c dlm: section mismatch warning fix 2008-05-19 15:37:27 -05:00
plock.c locks: add special return value for asynchronous locks 2008-07-25 10:53:47 -07:00
rcom.c dlm: fix rcom_names message to self 2008-02-21 15:19:54 -06:00
rcom.h [DLM] block dlm_recv in recovery transition 2007-10-10 08:56:38 +01:00
recover.c dlm: use proper type for ->ls_recover_buf 2008-02-04 01:24:07 -06:00
recover.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
recoverd.c dlm: recover nodes that are removed and re-added 2008-04-21 11:18:01 -05:00
recoverd.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00
requestqueue.c dlm: use proper C for dlm/requestqueue stuff (and fix alignment bug) 2008-02-04 01:21:32 -06:00
requestqueue.h dlm: use proper C for dlm/requestqueue stuff (and fix alignment bug) 2008-02-04 01:21:32 -06:00
user.c dlm-user: BKL pushdown 2008-06-20 14:05:56 -06:00
user.h [DLM] dlm: user locks 2006-07-13 09:25:34 -04:00
util.c dlm: do not byteswap rcom_config 2008-02-04 01:23:43 -06:00
util.h [DLM] The core of the DLM for GFS2/CLVM 2006-01-18 09:30:29 +00:00