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linux-hardened/fs/ceph
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Sage Weil 80e755fede ceph: allow writeback of snapped pages older than 'oldest' snapc 
On snap deletion, we don't regenerate ceph_cap_snaps for inodes with dirty
pages because deletion does not affect metadata writeback.  However, we
did run into problems when we went to write back the pages because the
'oldest' snapc is determined by the oldest cap_snap, and that may be the
newer snapc that reflects the deletion.  This caused confusion and an
infinite loop in ceph_update_writeable_page().

Change the snapc checks to allow writeback of any snapc that is equal to
OR older than the 'oldest' snapc.

When there are no cap_snaps, we were also using the realm's latest snapc
for writeback, which complicates ceph_put_wrbufffer_cap_refs().  Instead,
use i_head_snapc, the most snapc used for the most recent ('head') data.
This makes the writeback snapc (ceph_osd_request.r_snapc) _always_ match a
capsnap or i_head_snapc.

Also, in writepags_finish(), drop the snapc referenced by the _page_
and do not assume it matches the request snapc (it may not anymore).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-01 09:34:36 -07:00
..
crush ceph: whitespace cleanup 2009-12-03 14:59:44 -08:00
addr.c ceph: allow writeback of snapped pages older than 'oldest' snapc 2010-04-01 09:34:36 -07:00
armor.c ceph: aes crypto and base64 encode/decode helpers 2010-02-10 15:04:46 -08:00
auth.c ceph: add support for auth_x authentication protocol 2010-02-11 11:48:45 -08:00
auth.h ceph: allow renewal of auth credentials 2010-02-10 15:04:47 -08:00
auth_none.c ceph: add struct version to auth encoding 2010-02-10 15:04:48 -08:00
auth_none.h ceph: negotiate authentication protocol; implement AUTH_NONE protocol 2009-11-18 16:19:57 -08:00
auth_x.c ceph: clean up service ticket decoding 2010-03-23 07:46:47 -07:00
auth_x.h ceph: add support for auth_x authentication protocol 2010-02-11 11:48:45 -08:00
auth_x_protocol.h ceph: add support for auth_x authentication protocol 2010-02-11 11:48:45 -08:00
buffer.c ceph: buffer decoding helpers 2010-02-10 15:04:39 -08:00
buffer.h ceph: buffer decoding helpers 2010-02-10 15:04:39 -08:00
caps.c ceph: only release unused caps with mds requests 2010-03-23 07:46:55 -07:00
ceph_debug.h ceph: client types 2009-10-06 11:31:07 -07:00
ceph_frag.c ceph: client types 2009-10-06 11:31:07 -07:00
ceph_frag.h ceph: client types 2009-10-06 11:31:07 -07:00
ceph_fs.c ceph: make object hash a pg_pool property 2009-11-06 21:55:25 -08:00
ceph_fs.h ceph: v0.19 release 2010-02-17 13:56:07 -08:00
ceph_hash.c ceph: whitespace cleanup 2009-12-03 14:59:44 -08:00
ceph_hash.h ceph: make object hash a pg_pool property 2009-11-06 21:55:25 -08:00
ceph_strings.c ceph: negotiate authentication protocol; implement AUTH_NONE protocol 2009-11-18 16:19:57 -08:00
crypto.c ceph: aes crypto and base64 encode/decode helpers 2010-02-10 15:04:46 -08:00
crypto.h ceph: aes crypto and base64 encode/decode helpers 2010-02-10 15:04:46 -08:00
debugfs.c ceph: use rbtree for pg pools; decode new osdmap format 2010-02-17 10:02:49 -08:00
decode.h ceph: buffer decoding helpers 2010-02-10 15:04:39 -08:00
dir.c ceph: fix dentry rehashing on virtual .snap dir 2010-03-30 13:55:22 -07:00
export.c ceph: nfs re-export support 2009-10-06 11:31:13 -07:00
file.c ceph: return EBADF if waiting for caps on closed file 2010-03-01 15:28:00 -08:00
inode.c ceph: fix dentry rehashing on virtual .snap dir 2010-03-30 13:55:22 -07:00
ioctl.c ceph: allow preferred osd to be get/set via layout ioctl 2009-12-03 14:59:48 -08:00
ioctl.h ceph: allow preferred osd to be get/set via layout ioctl 2009-12-03 14:59:48 -08:00
Kconfig ceph: aes crypto and base64 encode/decode helpers 2010-02-10 15:04:46 -08:00
Makefile ceph: add support for auth_x authentication protocol 2010-02-11 11:48:45 -08:00
mds_client.c ceph: fix use after free on mds __unregister_request 2010-03-28 21:23:56 -07:00
mds_client.h ceph: fix iterate_caps removal race 2010-02-17 10:02:47 -08:00
mdsmap.c ceph: hex dump corrupt server data to KERN_DEBUG 2009-12-21 16:39:52 -08:00
mdsmap.h ceph: decode updated mdsmap format 2009-11-20 14:24:33 -08:00
messenger.c ceph: avoid reopening osd connections when address hasn't changed 2010-03-23 07:47:01 -07:00
messenger.h ceph: avoid reopening osd connections when address hasn't changed 2010-03-23 07:47:01 -07:00
mon_client.c ceph: fix up unexpected message handling 2010-02-23 14:26:29 -08:00
mon_client.h ceph: use rbtree for mon statfs requests 2010-02-16 22:01:10 -08:00
msgpool.c ceph: reset front len on return to msgpool; BUG on mismatched front iov 2010-03-01 15:25:00 -08:00
msgpool.h ceph: warn on allocation from msgpool with larger front_len 2009-10-15 18:14:43 -07:00
msgr.h ceph: include type in ceph_entity_addr, filepath 2010-01-29 12:41:09 -08:00
osd_client.c ceph: avoid reopening osd connections when address hasn't changed 2010-03-23 07:47:01 -07:00
osd_client.h ceph: rename r_sent_stamp r_stamp 2010-03-23 07:47:00 -07:00
osdmap.c ceph: fix pg pool decoding from incremental osdmap update 2010-03-23 07:46:57 -07:00
osdmap.h ceph: use rbtree for pg pools; decode new osdmap format 2010-02-17 10:02:49 -08:00
pagelist.c ceph: support ceph_pagelist for message payload 2009-12-23 12:12:31 -08:00
pagelist.h ceph: support ceph_pagelist for message payload 2009-12-23 12:12:31 -08:00
rados.h ceph: use rbtree for pg pools; decode new osdmap format 2010-02-17 10:02:49 -08:00
README ceph: make object hash a pg_pool property 2009-11-06 21:55:25 -08:00
snap.c ceph: fix snap rebuild condition 2010-03-23 07:47:02 -07:00
super.c ceph: reset osd after relevant messages timed out 2010-03-04 11:26:35 -08:00
super.h ceph: update for write_inode API change 2010-03-05 14:49:41 -08:00
types.h ceph: make object hash a pg_pool property 2009-11-06 21:55:25 -08:00
xattr.c ceph: simplify ceph_buffer interface 2009-12-07 12:17:17 -08:00

README 

#
# The following files are shared by (and manually synchronized
# between) the Ceph userland and kernel client.
#
# userland                  kernel
src/include/ceph_fs.h	    fs/ceph/ceph_fs.h
src/include/ceph_fs.cc	    fs/ceph/ceph_fs.c
src/include/msgr.h	    fs/ceph/msgr.h
src/include/rados.h	    fs/ceph/rados.h
src/include/ceph_strings.cc fs/ceph/ceph_strings.c
src/include/ceph_frag.h	    fs/ceph/ceph_frag.h
src/include/ceph_frag.cc    fs/ceph/ceph_frag.c
src/include/ceph_hash.h	    fs/ceph/ceph_hash.h
src/include/ceph_hash.cc    fs/ceph/ceph_hash.c
src/crush/crush.c	    fs/ceph/crush/crush.c
src/crush/crush.h	    fs/ceph/crush/crush.h
src/crush/mapper.c	    fs/ceph/crush/mapper.c
src/crush/mapper.h	    fs/ceph/crush/mapper.h
src/crush/hash.h	    fs/ceph/crush/hash.h
src/crush/hash.c	    fs/ceph/crush/hash.c