From 24bab491220faa446d945624086d838af41d616c Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Fri, 26 Sep 2014 13:58:27 -0400 Subject: NFSD: Implement SEEK This patch adds server support for the NFS v4.2 operation SEEK, which returns the position of the next hole or data segment in a file. Signed-off-by: Anna Schumaker Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4xdr.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) (limited to 'fs/nfsd/nfs4xdr.c') diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 0311baebd7d3..7ec646380005 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1513,6 +1513,22 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str DECODE_TAIL; } +static __be32 +nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) +{ + DECODE_HEAD; + + status = nfsd4_decode_stateid(argp, &seek->seek_stateid); + if (status) + return status; + + READ_BUF(8 + 4); + p = xdr_decode_hyper(p, &seek->seek_offset); + seek->seek_whence = be32_to_cpup(p); + + DECODE_TAIL; +} + static __be32 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) { @@ -1598,7 +1614,7 @@ static nfsd4_dec nfsd4_dec_ops[] = { [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, - [OP_SEEK] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, }; @@ -3765,6 +3781,22 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, return nfserr; } +static __be32 +nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, + struct nfsd4_seek *seek) +{ + __be32 *p; + + if (nfserr) + return nfserr; + + p = xdr_reserve_space(&resp->xdr, 4 + 8); + *p++ = cpu_to_be32(seek->seek_eof); + p = xdr_encode_hyper(p, seek->seek_pos); + + return nfserr; +} + static __be32 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) { @@ -3849,7 +3881,7 @@ static nfsd4_enc nfsd4_enc_ops[] = { [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, - [OP_SEEK] = (nfsd4_enc)nfsd4_encode_noop, + [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, }; -- cgit v1.2.3