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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 10:25:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 10:25:24 -0800
commita1703154200c390ab03c10224c586e815d3e31e8 (patch)
treedf90865eed3cfdf7af8664b5453a90e09d17480a /fs/ceph/dir.c
parent67b5ad9a63caa2ce56ddd2b22b802dae00d72c13 (diff)
parent766fc43973b16f9becb6b7402b3e052dbb84adee (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: rbd: fix cleanup when trying to mount inexistent image net/ceph: make ceph_msgr_wq non-reentrant ceph: fsc->*_wq's aren't used in memory reclaim path ceph: Always free allocated memory in osdmap_decode() ceph: Makefile: Remove unnessary code ceph: associate requests with opening sessions ceph: drop redundant r_mds field ceph: implement DIRLAYOUTHASH feature to get dir layout from MDS ceph: add dir_layout to inode
Diffstat (limited to 'fs/ceph/dir.c')
-rw-r--r--fs/ceph/dir.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index fa7ca04ee816..0bc68de8edd7 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1224,6 +1224,26 @@ void ceph_dentry_lru_del(struct dentry *dn)
}
}
+/*
+ * Return name hash for a given dentry. This is dependent on
+ * the parent directory's hash function.
+ */
+unsigned ceph_dentry_hash(struct dentry *dn)
+{
+ struct inode *dir = dn->d_parent->d_inode;
+ struct ceph_inode_info *dci = ceph_inode(dir);
+
+ switch (dci->i_dir_layout.dl_dir_hash) {
+ case 0: /* for backward compat */
+ case CEPH_STR_HASH_LINUX:
+ return dn->d_name.hash;
+
+ default:
+ return ceph_str_hash(dci->i_dir_layout.dl_dir_hash,
+ dn->d_name.name, dn->d_name.len);
+ }
+}
+
const struct file_operations ceph_dir_fops = {
.read = ceph_read_dir,
.readdir = ceph_readdir,