diff options
| author | Olga Kornievskaia <kolga@netapp.com> | 2021-05-19 21:48:27 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-26 00:06:51 +0300 |
| commit | eac0b17a77fbd763d305a5eaa4fd1119e5a0fe0d (patch) | |
| tree | 8d4564e8689e153884abd2a0afb3a08fc271659f | |
| parent | eeeadbb9bd5652c47bb9b31aa9ad8b4f1b4aa8b3 (diff) | |
| download | linux-eac0b17a77fbd763d305a5eaa4fd1119e5a0fe0d.tar.xz | |
NFSD add vfs_fsync after async copy is done
Currently, the server does all copies as NFS_UNSTABLE. For synchronous
copies linux client will append a COMMIT to the COPY compound but for
async copies it does not (because COMMIT needs to be done after all
bytes are copied and not as a reply to the COPY operation).
However, in order to save the client doing a COMMIT as a separate
rpc, the server can reply back with NFS_FILE_SYNC copy. This patch
proposed to add vfs_fsync() call at the end of the async copy.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 14 | ||||
| -rw-r--r-- | fs/nfsd/xdr4.h | 1 |
2 files changed, 14 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 426b232ca9fd..48c0992cb65c 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1375,7 +1375,8 @@ static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) { - copy->cp_res.wr_stable_how = NFS_UNSTABLE; + copy->cp_res.wr_stable_how = + copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE; copy->cp_synchronous = sync; gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); } @@ -1386,6 +1387,7 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) u64 bytes_total = copy->cp_count; u64 src_pos = copy->cp_src_pos; u64 dst_pos = copy->cp_dst_pos; + __be32 status; /* See RFC 7862 p.67: */ if (bytes_total == 0) @@ -1403,6 +1405,16 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) src_pos += bytes_copied; dst_pos += bytes_copied; } while (bytes_total > 0 && !copy->cp_synchronous); + /* for a non-zero asynchronous copy do a commit of data */ + if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) { + down_write(©->nf_dst->nf_rwsem); + status = vfs_fsync_range(copy->nf_dst->nf_file, + copy->cp_dst_pos, + copy->cp_res.wr_bytes_written, 0); + up_write(©->nf_dst->nf_rwsem); + if (!status) + copy->committed = true; + } return bytes_copied; } diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index a7c425254fee..3e4052e3bd50 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -567,6 +567,7 @@ struct nfsd4_copy { struct vfsmount *ss_mnt; struct nfs_fh c_fh; nfs4_stateid stateid; + bool committed; }; struct nfsd4_seek { |