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| 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/nfs4proc.c | |
| parent | aa0d6aed45ff48bd41439211f2bda1d54585aba3 (diff) | |
| download | linux-ffa0160a103917defd5d9c097ae0455a59166e03.tar.gz linux-ffa0160a103917defd5d9c097ae0455a59166e03.tar.bz2 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/nfs4proc.c')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 3ba10a3534f1..819ad812c71b 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1012,6 +1012,47 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } static __be32 +nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_clone *clone) +{ + struct file *src, *dst; + __be32 status; + + status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, + &clone->cl_src_stateid, RD_STATE, + &src, NULL); + if (status) { + dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); + goto out; + } + + status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, + &clone->cl_dst_stateid, WR_STATE, + &dst, NULL); + if (status) { + dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); + goto out_put_src; + } + + /* fix up for NFS-specific error code */ + if (!S_ISREG(file_inode(src)->i_mode) || + !S_ISREG(file_inode(dst)->i_mode)) { + status = nfserr_wrong_type; + goto out_put_dst; + } + + status = nfsd4_clone_file_range(src, clone->cl_src_pos, + dst, clone->cl_dst_pos, clone->cl_count); + +out_put_dst: + fput(dst); +out_put_src: + fput(src); +out: + return status; +} + +static __be32 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_fallocate *fallocate, int flags) { @@ -2281,6 +2322,12 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_name = "OP_DEALLOCATE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, + [OP_CLONE] = { + .op_func = (nfsd4op_func)nfsd4_clone, + .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, + .op_name = "OP_CLONE", + .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, + }, [OP_SEEK] = { .op_func = (nfsd4op_func)nfsd4_seek, .op_name = "OP_SEEK", |