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authorSage Weil <sage@newdream.net>2010-11-16 11:14:34 -0800
committerSage Weil <sage@newdream.net>2011-01-12 15:15:12 -0800
commit6c0f3af72cb1622a66962a1180c36ef8c41be8e2 (patch)
tree66e415bf31ea31a3e9360c0ce624fd20b6050c89 /fs/ceph/super.h
parent3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 (diff)
ceph: add dir_layout to inode
Add a ceph_dir_layout to the inode, and calculate dentry hash values based on the parent directory's specified dir_hash function. This is needed because the old default Linux dcache hash function is extremely week and leads to a poor distribution of files among dir fragments. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/super.h')
-rw-r--r--fs/ceph/super.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 7f01728a4657..6e0826695112 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -239,6 +239,7 @@ struct ceph_inode_info {
unsigned i_ceph_flags;
unsigned long i_release_count;
+ struct ceph_dir_layout i_dir_layout;
struct ceph_file_layout i_layout;
char *i_symlink;
@@ -768,6 +769,7 @@ extern void ceph_dentry_lru_add(struct dentry *dn);
extern void ceph_dentry_lru_touch(struct dentry *dn);
extern void ceph_dentry_lru_del(struct dentry *dn);
extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
+extern unsigned ceph_dentry_hash(struct dentry *dn);
/*
* our d_ops vary depending on whether the inode is live,