To prepare for supporting boot-time page size selection, refactor code to remove assumptions about PAGE_SIZE being compile-time constant. Code intended to be equivalent when compile-time page size is active. Updated array sizes in various structs to contain enough entries for the smallest supported page size. Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx> --- ***NOTE*** Any confused maintainers may want to read the cover note here for context: https://lore.kernel.org/all/20241014105514.3206191-1-ryan.roberts@xxxxxxx/ include/linux/sunrpc/svc.h | 8 +++++--- include/linux/sunrpc/svc_rdma.h | 4 ++-- include/linux/sunrpc/svcsock.h | 2 +- 3 files changed, 8 insertions(+), 6 deletions(-) diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index a7d0406b9ef59..dda44018b8f36 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -160,6 +160,8 @@ extern u32 svc_max_payload(const struct svc_rqst *rqstp); */ #define RPCSVC_MAXPAGES ((RPCSVC_MAXPAYLOAD+PAGE_SIZE-1)/PAGE_SIZE \ + 2 + 1) +#define RPCSVC_MAXPAGES_MAX ((RPCSVC_MAXPAYLOAD+PAGE_SIZE_MIN-1)/PAGE_SIZE_MIN \ + + 2 + 1) /* * The context of a single thread, including the request currently being @@ -190,14 +192,14 @@ struct svc_rqst { struct xdr_stream rq_res_stream; struct page *rq_scratch_page; struct xdr_buf rq_res; - struct page *rq_pages[RPCSVC_MAXPAGES + 1]; + struct page *rq_pages[RPCSVC_MAXPAGES_MAX + 1]; struct page * *rq_respages; /* points into rq_pages */ struct page * *rq_next_page; /* next reply page to use */ struct page * *rq_page_end; /* one past the last page */ struct folio_batch rq_fbatch; - struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */ - struct bio_vec rq_bvec[RPCSVC_MAXPAGES]; + struct kvec rq_vec[RPCSVC_MAXPAGES_MAX]; /* generally useful.. */ + struct bio_vec rq_bvec[RPCSVC_MAXPAGES_MAX]; __be32 rq_xid; /* transmission id */ u32 rq_prog; /* program number */ diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index d33bab33099ab..7c6441e8d6f7a 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -200,7 +200,7 @@ struct svc_rdma_recv_ctxt { struct svc_rdma_pcl rc_reply_pcl; unsigned int rc_page_count; - struct page *rc_pages[RPCSVC_MAXPAGES]; + struct page *rc_pages[RPCSVC_MAXPAGES_MAX]; }; /* @@ -242,7 +242,7 @@ struct svc_rdma_send_ctxt { void *sc_xprt_buf; int sc_page_count; int sc_cur_sge_no; - struct page *sc_pages[RPCSVC_MAXPAGES]; + struct page *sc_pages[RPCSVC_MAXPAGES_MAX]; struct ib_sge sc_sges[]; }; diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index 7c78ec6356b92..6c6bcc82685a3 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -40,7 +40,7 @@ struct svc_sock { struct completion sk_handshake_done; - struct page * sk_pages[RPCSVC_MAXPAGES]; /* received data */ + struct page * sk_pages[RPCSVC_MAXPAGES_MAX]; /* received data */ }; static inline u32 svc_sock_reclen(struct svc_sock *svsk) -- 2.43.0
