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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 10:21:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 10:21:13 -0700
commitf41def397161053eb0d3ed6861ef65985efbf293 (patch)
tree28c03e8f26fc975ab059ff407b0c3d9165bc489f /Documentation
parent7b1373dd6e86f3a222590ae404a400e699b32884 (diff)
parent3ee5a7015c8b7cb4de21f7345f8381946f2fce55 (diff)
Merge tag 'ceph-for-5.4-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov: "The highlights are: - automatic recovery of a blacklisted filesystem session (Zheng Yan). This is disabled by default and can be enabled by mounting with the new "recover_session=clean" option. - serialize buffered reads and O_DIRECT writes (Jeff Layton). Care is taken to avoid serializing O_DIRECT reads and writes with each other, this is based on the exclusion scheme from NFS. - handle large osdmaps better in the face of fragmented memory (myself) - don't limit what security.* xattrs can be get or set (Jeff Layton). We were overly restrictive here, unnecessarily preventing things like file capability sets stored in security.capability from working. - allow copy_file_range() within the same inode and across different filesystems within the same cluster (Luis Henriques)" * tag 'ceph-for-5.4-rc1' of git://github.com/ceph/ceph-client: (41 commits) ceph: call ceph_mdsc_destroy from destroy_fs_client libceph: use ceph_kvmalloc() for osdmap arrays libceph: avoid a __vmalloc() deadlock in ceph_kvmalloc() ceph: allow object copies across different filesystems in the same cluster ceph: include ceph_debug.h in cache.c ceph: move static keyword to the front of declarations rbd: pull rbd_img_request_create() dout out into the callers ceph: reconnect connection if session hang in opening state libceph: drop unused con parameter of calc_target() ceph: use release_pages() directly rbd: fix response length parameter for encoded strings ceph: allow arbitrary security.* xattrs ceph: only set CEPH_I_SEC_INITED if we got a MAC label ceph: turn ceph_security_invalidate_secctx into static inline ceph: add buffered/direct exclusionary locking for reads and writes libceph: handle OSD op ceph_pagelist_append() errors ceph: don't return a value from void function ceph: don't freeze during write page faults ceph: update the mtime when truncating up ceph: fix indentation in __get_snap_name() ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/ceph.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt
index d2c6a5ccf0f5..b19b6a03f91c 100644
--- a/Documentation/filesystems/ceph.txt
+++ b/Documentation/filesystems/ceph.txt
@@ -158,6 +158,20 @@ Mount Options
copies. Currently, it's only used in copy_file_range, which will revert
to the default VFS implementation if this option is used.
+ recover_session=<no|clean>
+ Set auto reconnect mode in the case where the client is blacklisted. The
+ available modes are "no" and "clean". The default is "no".
+
+ * no: never attempt to reconnect when client detects that it has been
+ blacklisted. Operations will generally fail after being blacklisted.
+
+ * clean: client reconnects to the ceph cluster automatically when it
+ detects that it has been blacklisted. During reconnect, client drops
+ dirty data/metadata, invalidates page caches and writable file handles.
+ After reconnect, file locks become stale because the MDS loses track
+ of them. If an inode contains any stale file locks, read/write on the
+ inode is not allowed until applications release all stale file locks.
+
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