1 // SPDX-License-Identifier: GPL-2.0
13  * pcl_free - Release all memory associated with a parsed chunk list
19 	while (!list_empty(&pcl->cl_chunks)) {  in pcl_free()
23 		list_del(&chunk->ch_list);  in pcl_free()
36 	chunk->ch_position = position;  in pcl_alloc_chunk()
37 	chunk->ch_length = 0;  in pcl_alloc_chunk()
38 	chunk->ch_payload_length = 0;  in pcl_alloc_chunk()
39 	chunk->ch_segcount = 0;  in pcl_alloc_chunk()
49 		if (pos->ch_position == position)  in pcl_lookup_position()
61 		if (pos->ch_position > chunk->ch_position)  in pcl_insert_position()
64 	__list_add(&chunk->ch_list, pos->ch_list.prev, &pos->ch_list);  in pcl_insert_position()
65 	pcl->cl_count++;  in pcl_insert_position()
72 	struct svc_rdma_segment *segment;  in pcl_set_read_segment()  local
74 	segment = &chunk->ch_segments[chunk->ch_segcount];  in pcl_set_read_segment()
75 	segment->rs_handle = handle;  in pcl_set_read_segment()
76 	segment->rs_length = length;  in pcl_set_read_segment()
77 	segment->rs_offset = offset;  in pcl_set_read_segment()
79 	trace_svcrdma_decode_rseg(&rctxt->rc_cid, chunk, segment);  in pcl_set_read_segment()
81 	chunk->ch_length += length;  in pcl_set_read_segment()
82 	chunk->ch_segcount++;  in pcl_set_read_segment()
86  * pcl_alloc_call - Construct a parsed chunk list for the Call body
88  * @p: Start of an un-decoded Read list
91  * - The incoming Read list has already been sanity checked.
92  * - cl_count is already set to the number of segments in
93  *   the un-decoded list.
94  * - The list might not be in order by position.
104 	struct svc_rdma_pcl *pcl = &rctxt->rc_call_pcl;  in pcl_alloc_call()
105 	unsigned int i, segcount = pcl->cl_count;  in pcl_alloc_call()
107 	pcl->cl_count = 0;  in pcl_alloc_call()
108 	for (i = 0; i < segcount; i++) {  in pcl_alloc_call()
116 		if (position != 0)  in pcl_alloc_call()
125 			chunk = list_first_entry(&pcl->cl_chunks,  in pcl_alloc_call()
137  * pcl_alloc_read - Construct a parsed chunk list for normal Read chunks
139  * @p: Start of an un-decoded Read list
142  * - The incoming Read list has already been sanity checked.
143  * - cl_count is already set to the number of segments in
144  *   the un-decoded list.
145  * - The list might not be in order by position.
154  * - Check for chunk range overlaps
158 	struct svc_rdma_pcl *pcl = &rctxt->rc_read_pcl;  in pcl_alloc_read()
159 	unsigned int i, segcount = pcl->cl_count;  in pcl_alloc_read()
161 	pcl->cl_count = 0;  in pcl_alloc_read()
162 	for (i = 0; i < segcount; i++) {  in pcl_alloc_read()
170 		if (position == 0)  in pcl_alloc_read()
188  * pcl_alloc_write - Construct a parsed chunk list from a Write list
191  * @p: Start of an un-decoded Write list
194  * - The incoming Write list has already been sanity checked, and
195  * - cl_count is set to the number of chunks in the un-decoded list.
204 	struct svc_rdma_segment *segment;  in pcl_alloc_write()  local
209 	for (i = 0; i < pcl->cl_count; i++) {  in pcl_alloc_write()
213 		chunk = pcl_alloc_chunk(segcount, 0);  in pcl_alloc_write()
216 		list_add_tail(&chunk->ch_list, &pcl->cl_chunks);  in pcl_alloc_write()
218 		for (j = 0; j < segcount; j++) {  in pcl_alloc_write()
219 			segment = &chunk->ch_segments[j];  in pcl_alloc_write()
220 			p = xdr_decode_rdma_segment(p, &segment->rs_handle,  in pcl_alloc_write()
221 						    &segment->rs_length,  in pcl_alloc_write()
222 						    &segment->rs_offset);  in pcl_alloc_write()
223 			trace_svcrdma_decode_wseg(&rctxt->rc_cid, chunk, j);  in pcl_alloc_write()
225 			chunk->ch_length += segment->rs_length;  in pcl_alloc_write()
226 			chunk->ch_segcount++;  in pcl_alloc_write()
240 		return 0;  in pcl_process_region()
242 		return -EMSGSIZE;  in pcl_process_region()
247  * pcl_process_nonpayloads - Process non-payload regions inside @xdr
250  * @actor: Function to invoke on each non-payload region
258  *  The xdr->len and ch_position fields are aligned to 4-byte multiples.
262  *   %-EMSGSIZE on XDR buffer overflow, or
277 	if (!chunk || !chunk->ch_payload_length)  in pcl_process_nonpayloads()
281 	ret = pcl_process_region(xdr, 0, chunk->ch_position, actor, data);  in pcl_process_nonpayloads()
282 	if (ret < 0)  in pcl_process_nonpayloads()
287 		if (!next->ch_payload_length)  in pcl_process_nonpayloads()
291 		ret = pcl_process_region(xdr, start, next->ch_position - start,  in pcl_process_nonpayloads()
293 		if (ret < 0)  in pcl_process_nonpayloads()
301 	ret = pcl_process_region(xdr, start, xdr->len - start, actor, data);  in pcl_process_nonpayloads()
302 	if (ret < 0)  in pcl_process_nonpayloads()
305 	return 0;  in pcl_process_nonpayloads()