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 27/32] NFS: Refactor nfs_readpage() and nfs_readpage_async() to use nfs_readdesc
Date: Mon, 25 Jan 2021 21:36:13 +0000 [thread overview]
Message-ID: <161161057357.2537118.6542184374596533032.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <161161025063.2537118.2009249444682241405.stgit@warthog.procyon.org.uk>
From: Dave Wysochanski <dwysocha@redhat.com>
Both nfs_readpage() and nfs_readpages() use similar code.
This patch should be no functional change, and refactors
nfs_readpage_async() to use nfs_readdesc to enable future
merging of nfs_readpage_async() and nfs_readpage_async_filler().
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
---
fs/nfs/read.c | 62 +++++++++++++++++++++++-------------------------
include/linux/nfs_fs.h | 3 +-
2 files changed, 31 insertions(+), 34 deletions(-)
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 1153c4e0a155..5fda30742a32 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -114,18 +114,23 @@ static void nfs_readpage_release(struct nfs_page *req, int error)
nfs_release_request(req);
}
-int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
+struct nfs_readdesc {
+ struct nfs_pageio_descriptor pgio;
+ struct nfs_open_context *ctx;
+};
+
+int nfs_readpage_async(void *data, struct inode *inode,
struct page *page)
{
+ struct nfs_readdesc *desc = (struct nfs_readdesc *)data;
struct nfs_page *new;
unsigned int len;
- struct nfs_pageio_descriptor pgio;
struct nfs_pgio_mirror *pgm;
len = nfs_page_length(page);
if (len == 0)
return nfs_return_empty_page(page);
- new = nfs_create_request(ctx, page, 0, len);
+ new = nfs_create_request(desc->ctx, page, 0, len);
if (IS_ERR(new)) {
unlock_page(page);
return PTR_ERR(new);
@@ -133,21 +138,21 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
if (len < PAGE_SIZE)
zero_user_segment(page, len, PAGE_SIZE);
- nfs_pageio_init_read(&pgio, inode, false,
+ nfs_pageio_init_read(&desc->pgio, inode, false,
&nfs_async_read_completion_ops);
- if (!nfs_pageio_add_request(&pgio, new)) {
+ if (!nfs_pageio_add_request(&desc->pgio, new)) {
nfs_list_remove_request(new);
- nfs_readpage_release(new, pgio.pg_error);
+ nfs_readpage_release(new, desc->pgio.pg_error);
}
- nfs_pageio_complete(&pgio);
+ nfs_pageio_complete(&desc->pgio);
/* It doesn't make sense to do mirrored reads! */
- WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+ WARN_ON_ONCE(desc->pgio.pg_mirror_count != 1);
- pgm = &pgio.pg_mirrors[0];
+ pgm = &desc->pgio.pg_mirrors[0];
NFS_I(inode)->read_io += pgm->pg_bytes_written;
- return pgio.pg_error < 0 ? pgio.pg_error : 0;
+ return desc->pgio.pg_error < 0 ? desc->pgio.pg_error : 0;
}
static void nfs_page_group_set_uptodate(struct nfs_page *req)
@@ -312,7 +317,7 @@ static void nfs_readpage_result(struct rpc_task *task,
*/
int nfs_readpage(struct file *filp, struct page *page)
{
- struct nfs_open_context *ctx;
+ struct nfs_readdesc desc;
struct inode *inode = page_file_mapping(page)->host;
int ret;
@@ -339,39 +344,34 @@ int nfs_readpage(struct file *filp, struct page *page)
if (filp == NULL) {
ret = -EBADF;
- ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
- if (ctx == NULL)
+ desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
+ if (desc.ctx == NULL)
goto out_unlock;
} else
- ctx = get_nfs_open_context(nfs_file_open_context(filp));
+ desc.ctx = get_nfs_open_context(nfs_file_open_context(filp));
if (!IS_SYNC(inode)) {
- ret = nfs_readpage_from_fscache(ctx, inode, page);
+ ret = nfs_readpage_from_fscache(desc.ctx, inode, page);
if (ret == 0)
goto out;
}
- xchg(&ctx->error, 0);
- ret = nfs_readpage_async(ctx, inode, page);
+ xchg(&desc.ctx->error, 0);
+ ret = nfs_readpage_async(&desc, inode, page);
if (!ret) {
ret = wait_on_page_locked_killable(page);
if (!PageUptodate(page) && !ret)
- ret = xchg(&ctx->error, 0);
+ ret = xchg(&desc.ctx->error, 0);
}
nfs_add_stats(inode, NFSIOS_READPAGES, 1);
out:
- put_nfs_open_context(ctx);
+ put_nfs_open_context(desc.ctx);
return ret;
out_unlock:
unlock_page(page);
return ret;
}
-struct nfs_readdesc {
- struct nfs_pageio_descriptor *pgio;
- struct nfs_open_context *ctx;
-};
-
static int
readpage_async_filler(void *data, struct page *page)
{
@@ -390,9 +390,9 @@ readpage_async_filler(void *data, struct page *page)
if (len < PAGE_SIZE)
zero_user_segment(page, len, PAGE_SIZE);
- if (!nfs_pageio_add_request(desc->pgio, new)) {
+ if (!nfs_pageio_add_request(&desc->pgio, new)) {
nfs_list_remove_request(new);
- error = desc->pgio->pg_error;
+ error = desc->pgio.pg_error;
nfs_readpage_release(new, error);
goto out;
}
@@ -407,7 +407,6 @@ readpage_async_filler(void *data, struct page *page)
int nfs_readpages(struct file *filp, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
- struct nfs_pageio_descriptor pgio;
struct nfs_pgio_mirror *pgm;
struct nfs_readdesc desc;
struct inode *inode = mapping->host;
@@ -440,17 +439,16 @@ 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_pageio_init_read(&desc.pgio, inode, false,
&nfs_async_read_completion_ops);
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
- nfs_pageio_complete(&pgio);
+ nfs_pageio_complete(&desc.pgio);
/* It doesn't make sense to do mirrored reads! */
- WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+ WARN_ON_ONCE(desc.pgio.pg_mirror_count != 1);
- pgm = &pgio.pg_mirrors[0];
+ pgm = &desc.pgio.pg_mirrors[0];
NFS_I(inode)->read_io += pgm->pg_bytes_written;
npages = (pgm->pg_bytes_written + PAGE_SIZE - 1) >>
PAGE_SHIFT;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 681ed98e4ba8..cb0248a34518 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -570,8 +570,7 @@ nfs_have_writebacks(struct inode *inode)
extern int nfs_readpage(struct file *, struct page *);
extern int nfs_readpages(struct file *, struct address_space *,
struct list_head *, unsigned);
-extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
- struct page *);
+extern int nfs_readpage_async(void *, struct inode *, struct page *);
/*
* inline functions
next prev parent reply other threads:[~2021-01-25 21:40 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 ` [PATCH 25/32] NFS: Clean up nfs_readpage() and nfs_readpages() David Howells
2021-01-26 3:59 ` 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 ` David Howells [this message]
2021-01-26 4:05 ` [PATCH 27/32] NFS: Refactor nfs_readpage() and nfs_readpage_async() to use nfs_readdesc 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=161161057357.2537118.6542184374596533032.stgit@warthog.procyon.org.uk \
--to=dhowells@redhat.com \
--cc=anna.schumaker@netapp.com \
--cc=asmadeus@codewreck.org \
--cc=ceph-devel@vger.kernel.org \
--cc=dwysocha@redhat.com \
--cc=jlayton@redhat.com \
--cc=linux-afs@lists.infradead.org \
--cc=linux-cachefs@redhat.com \
--cc=linux-cifs@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=sfrench@samba.org \
--cc=trondmy@hammerspace.com \
--cc=v9fs-developer@lists.sourceforge.net \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).