On Mon, 2022-10-17 at 06:52 -0400, Dave Wysochanski wrote:
> Rename readpage_async_filler to nfs_pageio_add_page to
> better reflect what this function does (add a page to
> the nfs_pageio_descriptor), and simplify arguments to
> this function by removing struct nfs_readdesc.
>
> Signed-off-by: Dave Wysochanski <dwysocha@xxxxxxxxxx>
> Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> fs/nfs/read.c | 60 +++++++++++++++++++++++++------------------------
> --
> 1 file changed, 30 insertions(+), 30 deletions(-)
>
> diff --git a/fs/nfs/read.c b/fs/nfs/read.c
> index 8ae2c8d1219d..525e82ea9a9e 100644
> --- a/fs/nfs/read.c
> +++ b/fs/nfs/read.c
> @@ -127,11 +127,6 @@ static void nfs_readpage_release(struct nfs_page
> *req, int error)
> nfs_release_request(req);
> }
>
> -struct nfs_readdesc {
> - struct nfs_pageio_descriptor pgio;
> - struct nfs_open_context *ctx;
> -};
> -
> static void nfs_page_group_set_uptodate(struct nfs_page *req)
> {
> if (nfs_page_group_sync_on_bit(req, PG_UPTODATE))
> @@ -153,7 +148,8 @@ static void nfs_read_completion(struct
> nfs_pgio_header *hdr)
>
> if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
> /* note: regions of the page not covered by a
> - * request are zeroed in
> readpage_async_filler */
> + * request are zeroed in nfs_pageio_add_page
> + */
> if (bytes > hdr->good_bytes) {
> /* nothing in this request was good,
> so zero
> * the full extent of the request */
> @@ -281,8 +277,10 @@ static void nfs_readpage_result(struct rpc_task
> *task,
> nfs_readpage_retry(task, hdr);
> }
>
> -static int
> -readpage_async_filler(struct nfs_readdesc *desc, struct page *page)
> +int
> +nfs_pageio_add_page(struct nfs_pageio_descriptor *pgio,
> + struct nfs_open_context *ctx,
> + struct page *page)
If we're going to rename this function, then let's not give it a name
that suggests it belongs in pagelist.c. It's not a generic helper
function, but is still very much specific to the pagecache read
functionality.
> {
> struct inode *inode = page_file_mapping(page)->host;
> unsigned int rsize = NFS_SERVER(inode)->rsize;
> @@ -302,15 +300,15 @@ readpage_async_filler(struct nfs_readdesc
> *desc, struct page *page)
> goto out_unlock;
> }
>
> - new = nfs_create_request(desc->ctx, page, 0, aligned_len);
> + new = nfs_create_request(ctx, page, 0, aligned_len);
> if (IS_ERR(new))
> goto out_error;
>
> if (len < PAGE_SIZE)
> zero_user_segment(page, len, PAGE_SIZE);
> - if (!nfs_pageio_add_request(&desc->pgio, new)) {
> + if (!nfs_pageio_add_request(pgio, new)) {
> nfs_list_remove_request(new);
> - error = desc->pgio.pg_error;
> + error = pgio->pg_error;
> nfs_readpage_release(new, error);
> goto out;
> }
> @@ -332,7 +330,8 @@ readpage_async_filler(struct nfs_readdesc *desc,
> struct page *page)
> int nfs_read_folio(struct file *file, struct folio *folio)
> {
> struct page *page = &folio->page;
> - struct nfs_readdesc desc;
> + struct nfs_pageio_descriptor pgio;
> + struct nfs_open_context *ctx;
> struct inode *inode = page_file_mapping(page)->host;
> int ret;
>
> @@ -358,29 +357,29 @@ int nfs_read_folio(struct file *file, struct
> folio *folio)
>
> if (file == NULL) {
> ret = -EBADF;
> - desc.ctx = nfs_find_open_context(inode, NULL,
> FMODE_READ);
> - if (desc.ctx == NULL)
> + ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
> + if (ctx == NULL)
> goto out_unlock;
> } else
> - desc.ctx =
> get_nfs_open_context(nfs_file_open_context(file));
> + ctx =
> get_nfs_open_context(nfs_file_open_context(file));
>
> - xchg(&desc.ctx->error, 0);
> - nfs_pageio_init_read(&desc.pgio, inode, false,
> + xchg(&ctx->error, 0);
> + nfs_pageio_init_read(&pgio, inode, false,
> &nfs_async_read_completion_ops);
>
> - ret = readpage_async_filler(&desc, page);
> + ret = nfs_pageio_add_page(&pgio, ctx, page);
> if (ret)
> goto out;
>
> - nfs_pageio_complete_read(&desc.pgio);
> - ret = desc.pgio.pg_error < 0 ? desc.pgio.pg_error : 0;
> + nfs_pageio_complete_read(&pgio);
> + ret = pgio.pg_error < 0 ? pgio.pg_error : 0;
> if (!ret) {
> ret = wait_on_page_locked_killable(page);
> if (!PageUptodate(page) && !ret)
> - ret = xchg(&desc.ctx->error, 0);
> + ret = xchg(&ctx->error, 0);
> }
> out:
> - put_nfs_open_context(desc.ctx);
> + put_nfs_open_context(ctx);
> trace_nfs_aop_readpage_done(inode, page, ret);
> return ret;
> out_unlock:
> @@ -391,9 +390,10 @@ int nfs_read_folio(struct file *file, struct
> folio *folio)
>
> void nfs_readahead(struct readahead_control *ractl)
> {
> + struct nfs_pageio_descriptor pgio;
> + struct nfs_open_context *ctx;
> unsigned int nr_pages = readahead_count(ractl);
> struct file *file = ractl->file;
> - struct nfs_readdesc desc;
> struct inode *inode = ractl->mapping->host;
> struct page *page;
> int ret;
> @@ -407,25 +407,25 @@ void nfs_readahead(struct readahead_control
> *ractl)
>
> if (file == NULL) {
> ret = -EBADF;
> - desc.ctx = nfs_find_open_context(inode, NULL,
> FMODE_READ);
> - if (desc.ctx == NULL)
> + ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
> + if (ctx == NULL)
> goto out;
> } else
> - desc.ctx =
> get_nfs_open_context(nfs_file_open_context(file));
> + ctx =
> get_nfs_open_context(nfs_file_open_context(file));
>
> - nfs_pageio_init_read(&desc.pgio, inode, false,
> + nfs_pageio_init_read(&pgio, inode, false,
> &nfs_async_read_completion_ops);
>
> while ((page = readahead_page(ractl)) != NULL) {
> - ret = readpage_async_filler(&desc, page);
> + ret = nfs_pageio_add_page(&pgio, ctx, page);
> put_page(page);
> if (ret)
> break;
> }
>
> - nfs_pageio_complete_read(&desc.pgio);
> + nfs_pageio_complete_read(&pgio);
>
> - put_nfs_open_context(desc.ctx);
> + put_nfs_open_context(ctx);
> out:
> trace_nfs_aop_readahead_done(inode, nr_pages, ret);
> }
--
Trond Myklebust
Linux NFS client maintainer, Hammerspace
trond.myklebust@xxxxxxxxxxxxxxx
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