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| author | Marc Eshel <eshel@almaden.ibm.com> | 2009-04-03 08:27:52 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-04-03 17:41:14 -0700 |
| commit | 5282fd724b667b7d65f2e41e405a825e58a78813 (patch) | |
| tree | 6603d2895c789db0e2244e9966f3a2246a6addb9 /include/linux | |
| parent | c4bf7868064ce8b9c75d8049d077e593c20602b3 (diff) | |
| download | blackbird-op-linux-5282fd724b667b7d65f2e41e405a825e58a78813.tar.gz blackbird-op-linux-5282fd724b667b7d65f2e41e405a825e58a78813.zip | |
nfsd41: sessionid hashing
Simple sessionid hashing using its monotonically increasing sequence number.
Locking considerations:
sessionid_hashtbl access is controlled by the sessionid_lock spin lock.
It must be taken for insert, delete, and lookup.
nfsd4_sequence looks up the session id and if the session is found,
it calls nfsd4_get_session (still under the sessionid_lock).
nfsd4_destroy_session calls nfsd4_put_session after unhashing
it, so when the session's kref reaches zero it's going to get freed.
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[we don't use a prime for sessionid hash table size]
[use sessionid_lock spin lock]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/nfsd/state.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h index 7faefc7c9d9a..5b3a6660f3af 100644 --- a/include/linux/nfsd/state.h +++ b/include/linux/nfsd/state.h @@ -132,6 +132,13 @@ nfsd4_get_session(struct nfsd4_session *ses) kref_get(&ses->se_ref); } +/* formatted contents of nfs4_sessionid */ +struct nfsd4_sessionid { + clientid_t clientid; + u32 sequence; + u32 reserved; +}; + #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ /* |
