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authorChristoph Hellwig <hch@lst.de>2015-12-03 12:59:52 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2015-12-08 05:12:00 +0100
commitffa0160a103917defd5d9c097ae0455a59166e03 (patch)
treefd4eeefca064c0a072e214fde0262fe8dbbff8a4 /fs/nfsd/nfs4xdr.c
parentnfsd: Pass filehandle to nfs4_preprocess_stateid_op() (diff)
downloadlinux-ffa0160a103917defd5d9c097ae0455a59166e03.tar.xz
linux-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.c21
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,
};
/*