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| author | Yehuda Sadeh <yehuda@hq.newdream.net> | 2010-06-17 16:16:12 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-08-01 20:11:40 -0700 |
| commit | 37151668bad3fd058368752bee476f2ba3645596 (patch) | |
| tree | 6eeae77dfa1c758ff03659b5677f474a72fbe7c0 /fs/ceph/mds_client.h | |
| parent | 0deb01c9998f8112c5e478e3fe3a930131abbc0a (diff) | |
| download | linux-37151668bad3fd058368752bee476f2ba3645596.tar.gz linux-37151668bad3fd058368752bee476f2ba3645596.tar.bz2 linux-37151668bad3fd058368752bee476f2ba3645596.zip | |
ceph: do caps accounting per mds_client
Caps related accounting is now being done per mds client instead
of just being global. This prepares ground work for a later revision
of the caps preallocated reservation list.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/mds_client.h')
| -rw-r--r-- | fs/ceph/mds_client.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index e389902db131..8f2126321f2d 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -151,6 +151,7 @@ typedef void (*ceph_mds_request_callback_t) (struct ceph_mds_client *mdsc, struct ceph_mds_request { u64 r_tid; /* transaction id */ struct rb_node r_node; + struct ceph_mds_client *r_mdsc; int r_op; /* mds op code */ int r_mds; @@ -267,6 +268,27 @@ struct ceph_mds_client { spinlock_t cap_dirty_lock; /* protects above items */ wait_queue_head_t cap_flushing_wq; + /* + * Cap reservations + * + * Maintain a global pool of preallocated struct ceph_caps, referenced + * by struct ceph_caps_reservations. This ensures that we preallocate + * memory needed to successfully process an MDS response. (If an MDS + * sends us cap information and we fail to process it, we will have + * problems due to the client and MDS being out of sync.) + * + * Reservations are 'owned' by a ceph_cap_reservation context. + */ + spinlock_t caps_list_lock; + struct list_head caps_list; /* unused (reserved or + unreserved) */ + int caps_total_count; /* total caps allocated */ + int caps_use_count; /* in use */ + int caps_reserve_count; /* unused, reserved */ + int caps_avail_count; /* unused, unreserved */ + int caps_min_count; /* keep at least this many + (unreserved) */ + #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_file; #endif |