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| author | NeilBrown <neilb@suse.de> | 2014-07-13 21:28:20 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-08-03 17:14:12 -0400 |
| commit | bd95608053b7f7813351b0defc0e3e7ef8cf2803 (patch) | |
| tree | fde08b1ecc2c4aedd30a68244ca502ce5f81f0fe /include/linux/uaccess.h | |
| parent | d51ac1a8e9b86b2d17d349bb256869cab6522787 (diff) | |
sunrpc/auth: allow lockless (rcu) lookup of credential cache.
The new flag RPCAUTH_LOOKUP_RCU to credential lookup avoids locking,
does not take a reference on the returned credential, and returns
-ECHILD if a simple lookup was not possible.
The returned value can only be used within an rcu_read_lock protected
region.
The main user of this is the new rpc_lookup_cred_nonblock() which
returns a pointer to the current credential which is only rcu-safe (no
ref-count held), and might return -ECHILD if allocation was required.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/uaccess.h')
0 files changed, 0 insertions, 0 deletions