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| author | Sage Weil <sage@newdream.net> | 2010-11-16 11:14:34 -0800 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-01-12 15:15:12 -0800 |
| commit | 6c0f3af72cb1622a66962a1180c36ef8c41be8e2 (patch) | |
| tree | 66e415bf31ea31a3e9360c0ce624fd20b6050c89 /net/ceph | |
| parent | 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 (diff) | |
| download | lwn-6c0f3af72cb1622a66962a1180c36ef8c41be8e2.tar.gz lwn-6c0f3af72cb1622a66962a1180c36ef8c41be8e2.zip | |
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 'net/ceph')
| -rw-r--r-- | net/ceph/ceph_hash.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c index 815ef8826796..0a1b53bce76d 100644 --- a/net/ceph/ceph_hash.c +++ b/net/ceph/ceph_hash.c @@ -1,5 +1,6 @@ #include <linux/ceph/types.h> +#include <linux/module.h> /* * Robert Jenkin's hash function. @@ -104,6 +105,7 @@ unsigned ceph_str_hash(int type, const char *s, unsigned len) return -1; } } +EXPORT_SYMBOL(ceph_str_hash); const char *ceph_str_hash_name(int type) { @@ -116,3 +118,4 @@ const char *ceph_str_hash_name(int type) return "unknown"; } } +EXPORT_SYMBOL(ceph_str_hash_name); |