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synced 2024-11-24 04:34:08 +08:00
NFSD: Replace boolean fields in struct nfsd4_copy
Clean up: saves 8 bytes, and we can replace check_and_set_stop_copy() with an atomic bitop. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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8ea6e2c90b
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1913cdf56c
@ -1293,23 +1293,9 @@ static void nfs4_put_copy(struct nfsd4_copy *copy)
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kfree(copy);
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}
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static bool
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check_and_set_stop_copy(struct nfsd4_copy *copy)
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{
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bool value;
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spin_lock(©->cp_clp->async_lock);
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value = copy->stopped;
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if (!copy->stopped)
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copy->stopped = true;
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spin_unlock(©->cp_clp->async_lock);
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return value;
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}
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static void nfsd4_stop_copy(struct nfsd4_copy *copy)
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{
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/* only 1 thread should stop the copy */
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if (!check_and_set_stop_copy(copy))
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if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags))
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kthread_stop(copy->copy_task);
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nfs4_put_copy(copy);
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}
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@ -1678,8 +1664,9 @@ static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
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static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
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{
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copy->cp_res.wr_stable_how =
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copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE;
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copy->cp_synchronous = sync;
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test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ?
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NFS_FILE_SYNC : NFS_UNSTABLE;
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nfsd4_copy_set_sync(copy, sync);
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gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
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}
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@ -1708,16 +1695,16 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
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copy->cp_res.wr_bytes_written += bytes_copied;
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src_pos += bytes_copied;
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dst_pos += bytes_copied;
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} while (bytes_total > 0 && !copy->cp_synchronous);
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} while (bytes_total > 0 && nfsd4_copy_is_async(copy));
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/* for a non-zero asynchronous copy do a commit of data */
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if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) {
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if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
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since = READ_ONCE(dst->f_wb_err);
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status = vfs_fsync_range(dst, copy->cp_dst_pos,
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copy->cp_res.wr_bytes_written, 0);
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if (!status)
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status = filemap_check_wb_err(dst->f_mapping, since);
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if (!status)
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copy->committed = true;
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set_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags);
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}
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return bytes_copied;
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}
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@ -1738,7 +1725,7 @@ static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
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status = nfs_ok;
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}
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if (!copy->cp_intra) /* Inter server SSC */
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if (nfsd4_ssc_is_inter(copy))
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nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
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copy->nf_dst);
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else
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@ -1752,13 +1739,13 @@ static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
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dst->cp_src_pos = src->cp_src_pos;
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dst->cp_dst_pos = src->cp_dst_pos;
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dst->cp_count = src->cp_count;
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dst->cp_synchronous = src->cp_synchronous;
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dst->cp_flags = src->cp_flags;
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memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
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memcpy(&dst->fh, &src->fh, sizeof(src->fh));
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dst->cp_clp = src->cp_clp;
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dst->nf_dst = nfsd_file_get(src->nf_dst);
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dst->cp_intra = src->cp_intra;
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if (src->cp_intra) /* for inter, file_src doesn't exist yet */
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/* for inter, nf_src doesn't exist yet */
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if (!nfsd4_ssc_is_inter(src))
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dst->nf_src = nfsd_file_get(src->nf_src);
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memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
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@ -1772,7 +1759,7 @@ static void cleanup_async_copy(struct nfsd4_copy *copy)
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{
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nfs4_free_copy_state(copy);
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nfsd_file_put(copy->nf_dst);
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if (copy->cp_intra)
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if (!nfsd4_ssc_is_inter(copy))
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nfsd_file_put(copy->nf_src);
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spin_lock(©->cp_clp->async_lock);
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list_del(©->copies);
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@ -1785,7 +1772,7 @@ static int nfsd4_do_async_copy(void *data)
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struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
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struct nfsd4_copy *cb_copy;
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if (!copy->cp_intra) { /* Inter server SSC */
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if (nfsd4_ssc_is_inter(copy)) {
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copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
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if (!copy->nf_src) {
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copy->nfserr = nfserr_serverfault;
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@ -1817,7 +1804,7 @@ do_callback:
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©->fh, copy->cp_count, copy->nfserr);
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nfsd4_run_cb(&cb_copy->cp_cb);
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out:
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if (!copy->cp_intra)
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if (nfsd4_ssc_is_inter(copy))
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kfree(copy->nf_src);
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cleanup_async_copy(copy);
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return 0;
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@ -1831,8 +1818,8 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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__be32 status;
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struct nfsd4_copy *async_copy = NULL;
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if (!copy->cp_intra) { /* Inter server SSC */
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if (!inter_copy_offload_enable || copy->cp_synchronous) {
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if (nfsd4_ssc_is_inter(copy)) {
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if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
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status = nfserr_notsupp;
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goto out;
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}
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@ -1849,7 +1836,7 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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copy->cp_clp = cstate->clp;
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memcpy(©->fh, &cstate->current_fh.fh_handle,
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sizeof(struct knfsd_fh));
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if (!copy->cp_synchronous) {
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if (nfsd4_copy_is_async(copy)) {
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struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
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status = nfserrno(-ENOMEM);
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@ -1884,7 +1871,7 @@ out_err:
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if (async_copy)
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cleanup_async_copy(async_copy);
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status = nfserrno(-ENOMEM);
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if (!copy->cp_intra)
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if (nfsd4_ssc_is_inter(copy))
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nfsd4_interssc_disconnect(copy->ss_mnt);
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goto out;
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}
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@ -2613,7 +2600,7 @@ check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
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return;
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}
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putfh = (struct nfsd4_putfh *)&saved_op->u;
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if (!copy->cp_intra)
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if (nfsd4_ssc_is_inter(copy))
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putfh->no_verify = true;
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}
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}
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@ -1896,8 +1896,8 @@ static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
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static __be32
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nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
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{
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u32 consecutive, i, count, sync;
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struct nl4_server *ns_dummy;
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u32 consecutive, i, count;
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__be32 status;
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status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
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@ -1915,17 +1915,17 @@ nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
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/* ca_consecutive: we always do consecutive copies */
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if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
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return nfserr_bad_xdr;
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if (xdr_stream_decode_u32(argp->xdr, ©->cp_synchronous) < 0)
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if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
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return nfserr_bad_xdr;
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nfsd4_copy_set_sync(copy, sync);
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if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
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return nfserr_bad_xdr;
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copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
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if (copy->cp_src == NULL)
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return nfserr_jukebox;
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copy->cp_intra = false;
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if (count == 0) { /* intra-server copy */
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copy->cp_intra = true;
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__set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
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return nfs_ok;
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}
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@ -4704,13 +4704,13 @@ nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
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__be32 *p;
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nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
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!!copy->cp_synchronous);
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nfsd4_copy_is_sync(copy));
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if (nfserr)
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return nfserr;
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p = xdr_reserve_space(resp->xdr, 4 + 4);
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*p++ = xdr_one; /* cr_consecutive */
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*p++ = cpu_to_be32(copy->cp_synchronous);
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*p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero;
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return 0;
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}
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@ -541,10 +541,12 @@ struct nfsd4_copy {
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u64 cp_dst_pos;
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u64 cp_count;
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struct nl4_server *cp_src;
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bool cp_intra;
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/* both */
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u32 cp_synchronous;
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unsigned long cp_flags;
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#define NFSD4_COPY_F_STOPPED (0)
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#define NFSD4_COPY_F_INTRA (1)
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#define NFSD4_COPY_F_SYNCHRONOUS (2)
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#define NFSD4_COPY_F_COMMITTED (3)
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/* response */
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struct nfsd42_write_res cp_res;
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@ -564,14 +566,35 @@ struct nfsd4_copy {
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struct list_head copies;
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struct task_struct *copy_task;
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refcount_t refcount;
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bool stopped;
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struct vfsmount *ss_mnt;
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struct nfs_fh c_fh;
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nfs4_stateid stateid;
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bool committed;
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};
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static inline void nfsd4_copy_set_sync(struct nfsd4_copy *copy, bool sync)
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{
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if (sync)
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set_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
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else
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clear_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
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}
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static inline bool nfsd4_copy_is_sync(const struct nfsd4_copy *copy)
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{
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return test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
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}
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static inline bool nfsd4_copy_is_async(const struct nfsd4_copy *copy)
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{
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return !test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
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}
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static inline bool nfsd4_ssc_is_inter(const struct nfsd4_copy *copy)
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{
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return !test_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
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}
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struct nfsd4_seek {
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/* request */
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stateid_t seek_stateid;
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