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author | Jeff Layton <jlayton@redhat.com> | 2010-01-08 12:17:21 -0500 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-02-10 08:30:52 -0500 |
commit | 97cefcc6d0aa6b4fc9ba67eb1ef4cc9e25f826f2 (patch) | |
tree | 3807bb7ff0767bfd4ab0e3572456ab6ca28da239 /fs/nfs/proc.c | |
parent | b68d69b8c6d19f4c2174f26fe8b750a0e82eb732 (diff) | |
download | kernel_samsung_crespo-97cefcc6d0aa6b4fc9ba67eb1ef4cc9e25f826f2.zip kernel_samsung_crespo-97cefcc6d0aa6b4fc9ba67eb1ef4cc9e25f826f2.tar.gz kernel_samsung_crespo-97cefcc6d0aa6b4fc9ba67eb1ef4cc9e25f826f2.tar.bz2 |
nfs: handle NFSv2 -EKEYEXPIRED returns from RPC layer appropriately
Add a wrapper around rpc_call_sync that handles -EKEYEXPIRED errors from
the RPC layer as it would an -EJUKEBOX error if NFSv2 had such a thing.
Also, add a handler for that error for async calls that makes it
resubmit the RPC on -EKEYEXPIRED.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/proc.c')
-rw-r--r-- | fs/nfs/proc.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index ef58385..c752d94 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -47,6 +47,39 @@ #define NFSDBG_FACILITY NFSDBG_PROC /* + * wrapper to handle the -EKEYEXPIRED error message. This should generally + * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't + * support the NFSERR_JUKEBOX error code, but we handle this situation in the + * same way that we handle that error with NFSv3. + */ +static int +nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) +{ + int res; + do { + res = rpc_call_sync(clnt, msg, flags); + if (res != -EKEYEXPIRED) + break; + schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); + res = -ERESTARTSYS; + } while (!fatal_signal_pending(current)); + return res; +} + +#define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) + +static int +nfs_async_handle_expired_key(struct rpc_task *task) +{ + if (task->tk_status != -EKEYEXPIRED) + return 0; + task->tk_status = 0; + rpc_restart_call(task); + rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); + return 1; +} + +/* * Bare-bones access to getattr: this is for nfs_read_super. */ static int @@ -307,6 +340,8 @@ nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) { + if (nfs_async_handle_expired_key(task)) + return 0; nfs_mark_for_revalidate(dir); return 1; } @@ -560,6 +595,9 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) { + if (nfs_async_handle_expired_key(task)) + return -EAGAIN; + nfs_invalidate_atime(data->inode); if (task->tk_status >= 0) { nfs_refresh_inode(data->inode, data->res.fattr); @@ -579,6 +617,9 @@ static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message * static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) { + if (nfs_async_handle_expired_key(task)) + return -EAGAIN; + if (task->tk_status >= 0) nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); return 0; |