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author | Peng Tao <tao.peng@primarydata.com> | 2015-09-26 02:24:35 +0800 |
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committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-10-15 16:07:36 -0400 |
commit | e5341f3a5762d17be9cdd06257c02c0098bdcab8 (patch) | |
tree | f915d5fdbad1a5a0d0840f0847610f410887ba9b /fs/nfs | |
parent | 36022770de6cf9a403c40a68712ed2d2ea2746be (diff) | |
download | linux-e5341f3a5762d17be9cdd06257c02c0098bdcab8.tar.gz linux-e5341f3a5762d17be9cdd06257c02c0098bdcab8.tar.bz2 linux-e5341f3a5762d17be9cdd06257c02c0098bdcab8.zip |
nfs42: add CLONE proc functions
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r-- | fs/nfs/nfs42.h | 1 | ||||
-rw-r--r-- | fs/nfs/nfs42proc.c | 71 | ||||
-rw-r--r-- | fs/nfs/nfs4proc.c | 3 |
3 files changed, 74 insertions, 1 deletions
diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h index 814c1255f1d2..b587ccd31083 100644 --- a/fs/nfs/nfs42.h +++ b/fs/nfs/nfs42.h @@ -17,5 +17,6 @@ int nfs42_proc_deallocate(struct file *, loff_t, loff_t); loff_t nfs42_proc_llseek(struct file *, loff_t, int); int nfs42_proc_layoutstats_generic(struct nfs_server *, struct nfs42_layoutstat_data *); +int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t); #endif /* __LINUX_FS_NFS_NFS4_2_H */ diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 0f020e4d8421..3e92a3cde15d 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -271,3 +271,74 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server, return PTR_ERR(task); return 0; } + +static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, + struct file *dst_f, loff_t src_offset, + loff_t dst_offset, loff_t count) +{ + struct inode *src_inode = file_inode(src_f); + struct inode *dst_inode = file_inode(dst_f); + struct nfs_server *server = NFS_SERVER(dst_inode); + struct nfs42_clone_args args = { + .src_fh = NFS_FH(src_inode), + .dst_fh = NFS_FH(dst_inode), + .src_offset = src_offset, + .dst_offset = dst_offset, + .dst_bitmask = server->cache_consistency_bitmask, + }; + struct nfs42_clone_res res = { + .server = server, + }; + int status; + + msg->rpc_argp = &args; + msg->rpc_resp = &res; + + status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ); + if (status) + return status; + + status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE); + if (status) + return status; + + res.dst_fattr = nfs_alloc_fattr(); + if (!res.dst_fattr) + return -ENOMEM; + + status = nfs4_call_sync(server->client, server, msg, + &args.seq_args, &res.seq_res, 0); + if (status == 0) + status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); + + kfree(res.dst_fattr); + return status; +} + +int nfs42_proc_clone(struct file *src_f, struct file *dst_f, + loff_t src_offset, loff_t dst_offset, loff_t count) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], + }; + struct inode *inode = file_inode(src_f); + struct nfs_server *server = NFS_SERVER(file_inode(src_f)); + struct nfs4_exception exception = { }; + int err; + + if (!nfs_server_capable(inode, NFS_CAP_CLONE)) + return -EOPNOTSUPP; + + do { + err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset, + dst_offset, count); + if (err == -ENOTSUPP || err == -EOPNOTSUPP) { + NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; + return -EOPNOTSUPP; + } + err = nfs4_handle_exception(server, err, &exception); + } while (exception.retry); + + return err; + +} diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 5133bb18830e..9688b1a9787f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8729,7 +8729,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { | NFS_CAP_ALLOCATE | NFS_CAP_DEALLOCATE | NFS_CAP_SEEK - | NFS_CAP_LAYOUTSTATS, + | NFS_CAP_LAYOUTSTATS + | NFS_CAP_CLONE, .init_client = nfs41_init_client, .shutdown_client = nfs41_shutdown_client, .match_stateid = nfs41_match_stateid, |