diff options
| author |   Christoph Hellwig <hch@lst.de> | 2015-12-03 12:59:52 +0100 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2015-12-07 23:12:00 -0500 |
| commit | ffa0160a103917defd5d9c097ae0455a59166e03 (patch) | |
| tree | fd4eeefca064c0a072e214fde0262fe8dbbff8a4 /fs/nfsd/nfs4xdr.c | |
| parent | nfsd: Pass filehandle to nfs4_preprocess_stateid_op() (diff) | |
| download | linux-dev-ffa0160a103917defd5d9c097ae0455a59166e03.tar.xz linux-dev-ffa0160a103917defd5d9c097ae0455a59166e03.zip | |
nfsd: implement the NFSv4.2 CLONE operation
This is basically a remote version of the btrfs CLONE operation,
so the implementation is fairly trivial. Made even more trivial
by stealing the XDR code and general framework Anna Schumaker's
COPY prototype.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 51c9e9ca39a4..924416f91fdd 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1675,6 +1675,25 @@ nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, } static __be32 +nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) +{ + DECODE_HEAD; + + status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); + if (status) + return status; + status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); + if (status) + return status; + + READ_BUF(8 + 8 + 8); + p = xdr_decode_hyper(p, &clone->cl_src_pos); + p = xdr_decode_hyper(p, &clone->cl_dst_pos); + p = xdr_decode_hyper(p, &clone->cl_count); + DECODE_TAIL; +} + +static __be32 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) { DECODE_HEAD; @@ -1785,6 +1804,7 @@ static nfsd4_dec nfsd4_dec_ops[] = { [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, }; static inline bool @@ -4292,6 +4312,7 @@ static nfsd4_enc nfsd4_enc_ops[] = { [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, + [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, }; /* |