linux-toradex.git/fs/ceph/super.h, branch v4.8-rc1

ceph: optimize cap flush waiting

2016-07-28T01:00:45+00:00

Add a 'wake' flag to ceph_cap_flush struct, which indicates if there
is someone waiting for it to finish. When getting flush ack message,
we check the 'wake' flag in corresponding ceph_cap_flush struct to
decide if we should wake up waiters. One corner case is that the
acked cap flush has 'wake' flags is set, but it is not the first one
on the flushing list. We do not wake up waiters in this case, set
'wake' flags of preceding ceph_cap_flush struct instead

Signed-off-by: Yan, Zheng

ceph: cleanup ceph_flush_snaps()

2016-07-28T01:00:44+00:00

This patch devide __ceph_flush_snaps() into two stags. In the first
stage, __ceph_flush_snaps() assign snapcaps flush TIDs and add them
to cap flush lists. __ceph_flush_snaps() keeps holding the
i_ceph_lock in this stagge. So inode's auth cap can not change. In
the second stage, __ceph_flush_snaps() send flushsnap cap messages.
i_ceph_lock is unlocked before sending each cap message. If auth cap
changes in the middle, __ceph_flush_snaps() just stops. This is OK
because kick_flushing_inode_caps() will re-send flushsnap cap messages
to inode's new auth MDS.

Signed-off-by: Yan, Zheng

ceph: introduce an inode flag to indicates if snapflush is needed

2016-07-28T01:00:43+00:00

Signed-off-by: Yan, Zheng

ceph: avoid sending duplicated cap flush message

2016-07-28T01:00:43+00:00

make ceph_kick_flushing_caps() ignore inodes whose cap flushes
have already been re-sent by ceph_early_kick_flushing_caps()

Signed-off-by: Yan, Zheng

ceph: unify cap flush and snapcap flush

2016-07-28T01:00:42+00:00

This patch includes following changes
- Assign flush tid to snapcap flush
- Remove session's s_cap_snaps_flushing list. Add inode to session's
  s_cap_flushing list instead. Inode is removed from the list when
  there is no pending snapcap flush or cap flush.
- make __kick_flushing_caps() re-send both snapcap flushes and cap
  flushes.

Signed-off-by: Yan, Zheng

ceph: use list instead of rbtree to track cap flushes

2016-07-28T01:00:42+00:00

We don't have requirement of searching cap flush by TID. In most cases,
we just need to know TID of the oldest cap flush. List is ideal for this
usage.

Signed-off-by: Yan, Zheng

ceph: mount non-default filesystem by name

2016-07-28T01:00:40+00:00

To mount non-default filesytem, user currently needs to provide mds
namespace ID. This is inconvenience.

This patch makes user be able to mount filesystem by name. If user
wants to mount non-default filesystem. Client first subscribes to
fsmap.user. Subscribe to mdsmap. after getting ID of filesystem.

Signed-off-by: Yan, Zheng

ceph: don't use ->d_time

2016-07-28T01:00:35+00:00

Pretty simple: just use ceph_dentry_info.time instead (which was already
there, unused).

Signed-off-by: Miklos Szeredi

ceph: wait unsafe sync writes for evicting inode

2016-07-28T00:55:40+00:00

Otherwise ceph_sync_write_unsafe() may access/modify freed inode.

Signed-off-by: Yan, Zheng

ceph: reduce i_nr_by_mode array size

2016-07-28T00:55:39+00:00

Track usage count for individual fmode bit. This can reduce the
array size by half.

Signed-off-by: Yan, Zheng