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author | Jeff Layton <jlayton@redhat.com> | 2016-09-16 16:28:23 -0400 |
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committer | J. Bruce Fields <bfields@redhat.com> | 2016-09-26 15:20:35 -0400 |
commit | a188620ebd294b18d8da93f4b2a307d484e7bd27 (patch) | |
tree | 9c59983232415a6c55452569422d64402f22d687 | |
parent | 1eca45f8a840987d0df355e0176921653e4f7ec2 (diff) | |
download | linux-stable-a188620ebd294b18d8da93f4b2a307d484e7bd27.tar.gz linux-stable-a188620ebd294b18d8da93f4b2a307d484e7bd27.tar.bz2 linux-stable-a188620ebd294b18d8da93f4b2a307d484e7bd27.zip |
nfsd: plumb in a CB_NOTIFY_LOCK operation
Add the encoding/decoding for CB_NOTIFY_LOCK operations.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
-rw-r--r-- | fs/nfsd/nfs4callback.c | 57 | ||||
-rw-r--r-- | fs/nfsd/state.h | 7 | ||||
-rw-r--r-- | fs/nfsd/xdr4cb.h | 9 |
3 files changed, 73 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index dbef646c6a2d..211dc2aed8e1 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -623,6 +623,62 @@ static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp, } #endif /* CONFIG_NFSD_PNFS */ +static void encode_stateowner(struct xdr_stream *xdr, struct nfs4_stateowner *so) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 8 + 4 + so->so_owner.len); + p = xdr_encode_opaque_fixed(p, &so->so_client->cl_clientid, 8); + xdr_encode_opaque(p, so->so_owner.data, so->so_owner.len); +} + +static void nfs4_xdr_enc_cb_notify_lock(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfsd4_callback *cb) +{ + const struct nfsd4_blocked_lock *nbl = + container_of(cb, struct nfsd4_blocked_lock, nbl_cb); + struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.fl_owner; + struct nfs4_cb_compound_hdr hdr = { + .ident = 0, + .minorversion = cb->cb_clp->cl_minorversion, + }; + + __be32 *p; + + BUG_ON(hdr.minorversion == 0); + + encode_cb_compound4args(xdr, &hdr); + encode_cb_sequence4args(xdr, cb, &hdr); + + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(OP_CB_NOTIFY_LOCK); + encode_nfs_fh4(xdr, &nbl->nbl_fh); + encode_stateowner(xdr, &lo->lo_owner); + hdr.nops++; + + encode_cb_nops(&hdr); +} + +static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfsd4_callback *cb) +{ + struct nfs4_cb_compound_hdr hdr; + int status; + + status = decode_cb_compound4res(xdr, &hdr); + if (unlikely(status)) + return status; + + if (cb) { + status = decode_cb_sequence4res(xdr, cb); + if (unlikely(status || cb->cb_seq_status)) + return status; + } + return decode_cb_op_status(xdr, OP_CB_NOTIFY_LOCK, &cb->cb_status); +} + /* * RPC procedure tables */ @@ -643,6 +699,7 @@ static struct rpc_procinfo nfs4_cb_procedures[] = { #ifdef CONFIG_NFSD_PNFS PROC(CB_LAYOUT, COMPOUND, cb_layout, cb_layout), #endif + PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock), }; static struct rpc_version nfs_cb_version4 = { diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 0bdc79cb359c..88d029dd13aa 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -571,6 +571,7 @@ enum nfsd4_cb_op { NFSPROC4_CLNT_CB_RECALL, NFSPROC4_CLNT_CB_LAYOUT, NFSPROC4_CLNT_CB_SEQUENCE, + NFSPROC4_CLNT_CB_NOTIFY_LOCK, }; /* Returns true iff a is later than b: */ @@ -579,6 +580,12 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b) return (s32)(a->si_generation - b->si_generation) > 0; } +struct nfsd4_blocked_lock { + struct file_lock nbl_lock; + struct knfsd_fh nbl_fh; + struct nfsd4_callback nbl_cb; +}; + struct nfsd4_compound_state; struct nfsd_net; diff --git a/fs/nfsd/xdr4cb.h b/fs/nfsd/xdr4cb.h index c47f6fdb111a..49b719dfef95 100644 --- a/fs/nfsd/xdr4cb.h +++ b/fs/nfsd/xdr4cb.h @@ -28,3 +28,12 @@ #define NFS4_dec_cb_layout_sz (cb_compound_dec_hdr_sz + \ cb_sequence_dec_sz + \ op_dec_sz) + +#define NFS4_enc_cb_notify_lock_sz (cb_compound_enc_hdr_sz + \ + cb_sequence_enc_sz + \ + 2 + 1 + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + enc_nfs4_fh_sz) +#define NFS4_dec_cb_notify_lock_sz (cb_compound_dec_hdr_sz + \ + cb_sequence_dec_sz + \ + op_dec_sz) |