From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Steve French <sfrench@samba.org>,
Dominique Martinet <asmadeus@codewreck.org>
Cc: Dave Wysochanski <dwysocha@redhat.com>,
dhowells@redhat.com, Jeff Layton <jlayton@redhat.com>,
David Wysochanski <dwysocha@redhat.com>,
Matthew Wilcox <willy@infradead.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-cachefs@redhat.com, linux-afs@lists.infradead.org,
linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org,
ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 25/32] NFS: Clean up nfs_readpage() and nfs_readpages()
Date: Mon, 25 Jan 2021 21:35:49 +0000 [thread overview]
Message-ID: <161161054970.2537118.5401048451896267742.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <161161025063.2537118.2009249444682241405.stgit@warthog.procyon.org.uk>
From: Dave Wysochanski <dwysocha@redhat.com>
In prep for the new fscache netfs API, refactor nfs_readpage()
and nfs_readpages() for future patches. No functional change.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
---
fs/nfs/read.c | 45 +++++++++++++++++++++++----------------------
1 file changed, 23 insertions(+), 22 deletions(-)
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index eb854f1f86e2..a05fb3904ddf 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -310,11 +310,11 @@ static void nfs_readpage_result(struct rpc_task *task,
* - The error flag is set for this page. This happens only when a
* previous async read operation failed.
*/
-int nfs_readpage(struct file *file, struct page *page)
+int nfs_readpage(struct file *filp, struct page *page)
{
struct nfs_open_context *ctx;
struct inode *inode = page_file_mapping(page)->host;
- int error;
+ int ret;
dprintk("NFS: nfs_readpage (%p %ld@%lu)\n",
page, PAGE_SIZE, page_index(page));
@@ -328,43 +328,43 @@ int nfs_readpage(struct file *file, struct page *page)
* be any new pending writes generated at this point
* for this page (other pages can be written to).
*/
- error = nfs_wb_page(inode, page);
- if (error)
+ ret = nfs_wb_page(inode, page);
+ if (ret)
goto out_unlock;
if (PageUptodate(page))
goto out_unlock;
- error = -ESTALE;
+ ret = -ESTALE;
if (NFS_STALE(inode))
goto out_unlock;
- if (file == NULL) {
- error = -EBADF;
+ if (filp == NULL) {
+ ret = -EBADF;
ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (ctx == NULL)
goto out_unlock;
} else
- ctx = get_nfs_open_context(nfs_file_open_context(file));
+ ctx = get_nfs_open_context(nfs_file_open_context(filp));
if (!IS_SYNC(inode)) {
- error = nfs_readpage_from_fscache(ctx, inode, page);
- if (error == 0)
+ ret = nfs_readpage_from_fscache(ctx, inode, page);
+ if (ret == 0)
goto out;
}
xchg(&ctx->error, 0);
- error = nfs_readpage_async(ctx, inode, page);
- if (!error) {
- error = wait_on_page_locked_killable(page);
- if (!PageUptodate(page) && !error)
- error = xchg(&ctx->error, 0);
+ ret = nfs_readpage_async(ctx, inode, page);
+ if (!ret) {
+ ret = wait_on_page_locked_killable(page);
+ if (!PageUptodate(page) && !ret)
+ ret = xchg(&ctx->error, 0);
}
out:
put_nfs_open_context(ctx);
- return error;
+ return ret;
out_unlock:
unlock_page(page);
- return error;
+ return ret;
}
struct nfs_readdesc {
@@ -409,12 +409,10 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
{
struct nfs_pageio_descriptor pgio;
struct nfs_pgio_mirror *pgm;
- struct nfs_readdesc desc = {
- .pgio = &pgio,
- };
+ struct nfs_readdesc desc;
struct inode *inode = mapping->host;
unsigned long npages;
- int ret = -ESTALE;
+ int ret;
dprintk("NFS: nfs_readpages (%s/%Lu %d)\n",
inode->i_sb->s_id,
@@ -422,13 +420,15 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
nr_pages);
nfs_inc_stats(inode, NFSIOS_VFSREADPAGES);
+ ret = -ESTALE;
if (NFS_STALE(inode))
goto out;
if (filp == NULL) {
+ ret = -EBADF;
desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (desc.ctx == NULL)
- return -EBADF;
+ goto out;
} else
desc.ctx = get_nfs_open_context(nfs_file_open_context(filp));
@@ -440,6 +440,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
goto read_complete; /* all pages were read */
+ desc.pgio = &pgio;
nfs_pageio_init_read(&pgio, inode, false,
&nfs_async_read_completion_ops);
next prev parent reply other threads:[~2021-01-25 22:17 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 21:30 [PATCH 00/32] Network fs helper library & fscache kiocb API [ver #2] David Howells
2021-01-25 21:31 ` [PATCH 01/32] iov_iter: Add ITER_XARRAY David Howells
2021-01-25 21:31 ` [PATCH 02/32] vm: Add wait/unlock functions for PG_fscache David Howells
2021-01-25 21:31 ` [PATCH 03/32] mm: Implement readahead_control pageset expansion David Howells
2021-01-25 21:31 ` [PATCH 04/32] vfs: Export rw_verify_area() for use by cachefiles David Howells
2021-01-25 21:31 ` [PATCH 05/32] netfs: Make a netfs helper module David Howells
2021-01-25 21:32 ` [PATCH 06/32] netfs: Provide readahead and readpage netfs helpers David Howells
2021-01-25 21:32 ` [PATCH 07/32] netfs: Add tracepoints David Howells
2021-01-25 21:32 ` [PATCH 08/32] netfs: Gather stats David Howells
2021-01-25 21:32 ` [PATCH 09/32] netfs: Add write_begin helper David Howells
2021-01-25 21:32 ` [PATCH 10/32] netfs: Define an interface to talk to a cache David Howells
2021-01-25 21:32 ` [PATCH 11/32] fscache, cachefiles: Add alternate API to use kiocb for read/write to cache David Howells
2021-01-25 21:33 ` [PATCH 12/32] afs: Disable use of the fscache I/O routines David Howells
2021-01-25 21:33 ` [PATCH 13/32] afs: Pass page into dirty region helpers to provide THP size David Howells
2021-01-25 21:33 ` [PATCH 14/32] afs: Print the operation debug_id when logging an unexpected data version David Howells
2021-01-25 21:33 ` [PATCH 15/32] afs: Move key to afs_read struct David Howells
2021-01-25 21:34 ` [PATCH 16/32] afs: Don't truncate iter during data fetch David Howells
2021-01-25 21:34 ` [PATCH 17/32] afs: Log remote unmarshalling errors David Howells
2021-01-25 21:34 ` [PATCH 18/32] afs: Set up the iov_iter before calling afs_extract_data() David Howells
2021-01-25 21:34 ` [PATCH 19/32] afs: Use ITER_XARRAY for writing David Howells
2021-01-25 21:34 ` [PATCH 20/32] afs: Wait on PG_fscache before modifying/releasing a page David Howells
2021-01-25 21:35 ` [PATCH 21/32] afs: Extract writeback extension into its own function David Howells
2021-01-25 21:35 ` [PATCH 22/32] afs: Prepare for use of THPs David Howells
2021-01-25 21:35 ` [PATCH 23/32] afs: Use the fs operation ops to handle FetchData completion David Howells
2021-01-25 21:35 ` [PATCH 24/32] afs: Use new fscache read helper API David Howells
2021-01-25 21:35 ` David Howells [this message]
2021-01-26 3:59 ` [PATCH 25/32] NFS: Clean up nfs_readpage() and nfs_readpages() Matthew Wilcox
2021-01-26 15:33 ` David Wysochanski
2021-01-25 21:36 ` [PATCH 26/32] NFS: In nfs_readpage() only increment NFSIOS_READPAGES when read succeeds David Howells
2021-01-25 21:36 ` [PATCH 27/32] NFS: Refactor nfs_readpage() and nfs_readpage_async() to use nfs_readdesc David Howells
2021-01-26 4:05 ` Matthew Wilcox
2021-01-26 15:24 ` David Wysochanski
2021-01-25 21:36 ` [PATCH 28/32] NFS: Call readpage_async_filler() from nfs_readpage_async() David Howells
2021-01-25 21:36 ` [PATCH 29/32] NFS: Add nfs_pageio_complete_read() and remove nfs_readpage_async() David Howells
2021-01-25 21:37 ` [PATCH 30/32] NFS: Allow internal use of read structs and functions David Howells
2021-01-25 21:37 ` [PATCH 31/32] NFS: Convert to the netfs API and nfs_readpage to use netfs_readpage David Howells
2021-01-25 21:37 ` [PATCH 32/32] NFS: Convert readpage to readahead and use netfs_readahead for fscache David Howells
2021-01-26 1:36 ` Matthew Wilcox
2021-01-26 15:24 ` Chuck Lever
2021-01-26 19:10 ` David Wysochanski
2021-01-26 18:25 ` David Wysochanski
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