Josh Durgin 27ff9f136a libceph: resend all writes after the osdmap loses the full flag ... commit 9a1ea2dbff11547a8e664f143c1ffefc586a577a upstream. With the current full handling, there is a race between osds and clients getting the first map marked full. If the osd wins, it will return -ENOSPC to any writes, but the client may already have writes in flight. This results in the client getting the error and propagating it up the stack. For rbd, the block layer turns this into EIO, which can cause corruption in filesystems above it. To avoid this race, osds are being changed to drop writes that came from clients with an osdmap older than the last osdmap marked full. In order for this to work, clients must resend all writes after they encounter a full -> not full transition in the osdmap. osds will wait for an updated map instead of processing a request from a client with a newer map, so resent writes will not be dropped by the osd unless there is another not full -> full transition. This approach requires both osds and clients to be fixed to avoid the race. Old clients talking to osds with this fix may hang instead of returning EIO and potentially corrupting an fs. New clients talking to old osds have the same behavior as before if they encounter this race. Fixes: http://tracker.ceph.com/issues/6938 Reviewed-by: Sage Weil <sage@inktank.com> Signed-off-by: Josh Durgin <josh.durgin@inktank.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-03-31 09:58:13 -07:00
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crush	crush: avoid recursion if we have already collided	2013-01-17 12:42:39 -06:00
armor.c
auth_none.c	libceph: Fix NULL pointer dereference in auth client code	2013-07-13 11:42:25 -07:00
auth_none.h
auth_x_protocol.h
auth_x.c	libceph: wrap auth ops in wrapper functions	2013-05-01 21:17:14 -07:00
auth_x.h	libceph: add update_authorizer auth method	2013-05-01 21:17:13 -07:00
auth.c	libceph: wrap auth methods in a mutex	2013-05-01 21:17:15 -07:00
buffer.c
ceph_common.c	libceph: use slab cache for osd client requests	2013-05-02 11:58:41 -05:00
ceph_fs.c
ceph_hash.c
ceph_strings.c	libceph: update ceph_osd_op_name()	2013-02-18 12:20:18 -06:00
crypto.c	libceph: eliminate sparse warnings	2013-02-25 15:37:18 -06:00
crypto.h	libceph: fix crypto key null deref, memory leak	2012-08-02 09:19:20 -07:00
debugfs.c	libceph: keep source rather than message osd op array	2013-05-01 21:18:12 -07:00
Kconfig	net/ceph: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:39:33 -08:00
Makefile	libceph: create source file "net/ceph/snapshot.c"	2013-05-01 21:20:08 -07:00
messenger.c	libceph: allocate ceph message data with a slab allocator	2013-05-02 11:58:36 -05:00
mon_client.c	libceph: wrap auth ops in wrapper functions	2013-05-01 21:17:14 -07:00
msgpool.c	libceph: initialize msgpool message types	2012-07-30 09:29:50 -07:00
osd_client.c	libceph: resend all writes after the osdmap loses the full flag	2014-03-31 09:58:13 -07:00
osdmap.c	libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc	2013-09-26 17:18:29 -07:00
pagelist.c	ceph: use list_move_tail instead of list_del/list_add_tail	2012-10-01 14:30:49 -05:00
pagevec.c	libceph: drop return value from page vector copy routines	2013-02-19 19:14:05 -06:00
snapshot.c	libceph: create source file "net/ceph/snapshot.c"	2013-05-01 21:20:08 -07:00