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svcrdma: Adjust the number of entries in svc_rdma_send_ctxt::sc_pages

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Allow allocation of more entries in the sc_pages[] array when the
maximum size of an RPC message is increased.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2025-04-28 15:36:57 -04:00
parent 81381d1a90
commit 56ab43f50d
2 changed files with 15 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/sunrpc/svc_rdma.h
View File

@@ -245,7 +245,8 @@ struct svc_rdma_send_ctxt {
void *sc_xprt_buf;
int sc_page_count;
int sc_cur_sge_no;
struct page *sc_pages[RPCSVC_MAXPAGES];
unsigned long sc_maxpages;
struct page **sc_pages;
struct ib_sge sc_sges[];
};

16
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@@ -118,6 +118,7 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
{
int node = ibdev_to_node(rdma->sc_cm_id->device);
struct svc_rdma_send_ctxt *ctxt;
unsigned long pages;
dma_addr_t addr;
void *buffer;
int i;
@@ -126,13 +127,19 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
GFP_KERNEL, node);
if (!ctxt)
goto fail0;
pages = svc_serv_maxpages(rdma->sc_xprt.xpt_server);
ctxt->sc_pages = kcalloc_node(pages, sizeof(struct page *),
GFP_KERNEL, node);
if (!ctxt->sc_pages)
goto fail1;
ctxt->sc_maxpages = pages;
buffer = kmalloc_node(rdma->sc_max_req_size, GFP_KERNEL, node);
if (!buffer)
goto fail1;
goto fail2;
addr = ib_dma_map_single(rdma->sc_pd->device, buffer,
rdma->sc_max_req_size, DMA_TO_DEVICE);
if (ib_dma_mapping_error(rdma->sc_pd->device, addr))
goto fail2;
goto fail3;
svc_rdma_send_cid_init(rdma, &ctxt->sc_cid);
@@ -151,8 +158,10 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
ctxt->sc_sges[i].lkey = rdma->sc_pd->local_dma_lkey;
return ctxt;
fail2:
fail3:
kfree(buffer);
fail2:
kfree(ctxt->sc_pages);
fail1:
kfree(ctxt);
fail0:
@@ -176,6 +185,7 @@ void svc_rdma_send_ctxts_destroy(struct svcxprt_rdma *rdma)
rdma->sc_max_req_size,
DMA_TO_DEVICE);
kfree(ctxt->sc_xprt_buf);
kfree(ctxt->sc_pages);
kfree(ctxt);
}
}