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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: dhowells@redhat.com, Jeff Layton <jlayton@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: [RFC PATCH 34/76] netfs: Use the cache
Date: Fri, 20 Nov 2020 15:09:54 +0000
Message-ID: <160588499435.3465195.10676629484149032256.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk>

Add support to the netfs support read helpers for reading data from the
cache instead of downloading it from the server and support for writing
data just downloaded or cleared to the cache.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/fscache/io.c         |    1 
 fs/netfs/read_helper.c  |  197 +++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/fscache.h |   11 +++
 include/linux/netfs.h   |    5 +
 4 files changed, 213 insertions(+), 1 deletion(-)

diff --git a/fs/fscache/io.c b/fs/fscache/io.c
index de9ffc16eb4f..90c056e85cea 100644
--- a/fs/fscache/io.c
+++ b/fs/fscache/io.c
@@ -9,6 +9,7 @@
 #include <linux/module.h>
 #include <linux/fscache-cache.h>
 #include <linux/slab.h>
+#include <linux/netfs.h>
 #include "internal.h"
 
 /*
diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
index d0e3d5e0ced4..f5185402b504 100644
--- a/fs/netfs/read_helper.c
+++ b/fs/netfs/read_helper.c
@@ -79,6 +79,7 @@ static void netfs_put_read_request(struct netfs_read_request *rreq)
 		netfs_rreq_clear_subreqs(rreq);
 		if (rreq->netfs_priv)
 			rreq->netfs_ops->cleanup(rreq->mapping, rreq->netfs_priv);
+		fscache_end_operation(&rreq->cache_resources);
 		kfree(rreq);
 	}
 }
@@ -125,6 +126,31 @@ static void netfs_clear_unread(struct netfs_read_subrequest *subreq)
 	iov_iter_zero(iov_iter_count(&iter), &iter);
 }
 
+static void netfs_cache_read_terminated(void *priv, ssize_t transferred_or_error)
+{
+	struct netfs_read_subrequest *subreq = priv;
+
+	netfs_subreq_terminated(subreq, transferred_or_error);
+}
+
+/*
+ * Issue a read against the cache.
+ * - Eats the caller's ref on subreq.
+ */
+static void netfs_read_from_cache(struct netfs_read_request *rreq,
+				  struct netfs_read_subrequest *subreq,
+				  bool seek_data)
+{
+	struct iov_iter iter;
+
+	iov_iter_xarray(&iter, READ, &rreq->mapping->i_pages,
+			subreq->start + subreq->transferred,
+			subreq->len   - subreq->transferred);
+
+	fscache_read(&rreq->cache_resources, subreq->start, &iter, seek_data,
+		     netfs_cache_read_terminated, subreq);
+}
+
 /*
  * Fill a subrequest region with zeroes.
  */
@@ -166,6 +192,122 @@ static void netfs_rreq_completed(struct netfs_read_request *rreq)
 	netfs_put_read_request(rreq);
 }
 
+/*
+ * Deal with the completion of writing the data to the cache.  We have to clear
+ * the PG_fscache bits on the pages involved and release the caller's ref.
+ *
+ * May be called in softirq mode and we inherit a ref from the caller.
+ */
+static void netfs_rreq_unmark_after_write(struct netfs_read_request *rreq)
+{
+	struct netfs_read_subrequest *subreq;
+	struct page *page;
+	pgoff_t unlocked = 0;
+	bool have_unlocked = false;
+
+	rcu_read_lock();
+
+	list_for_each_entry(subreq, &rreq->subrequests, rreq_link) {
+		XA_STATE(xas, &rreq->mapping->i_pages, subreq->start / PAGE_SIZE);
+
+		xas_for_each(&xas, page, (subreq->start + subreq->len - 1) / PAGE_SIZE) {
+			/* We might have multiple writes from the same huge
+			 * page, but we mustn't unlock a page more than once.
+			 */
+			if (have_unlocked && page->index <= unlocked)
+				continue;
+			unlocked = page->index;
+			unlock_page_fscache(page);
+			have_unlocked = true;
+		}
+	}
+
+	rcu_read_unlock();
+	netfs_rreq_completed(rreq);
+}
+
+static void netfs_rreq_copy_terminated(void *priv, ssize_t transferred_or_error)
+{
+	struct netfs_read_subrequest *subreq = priv;
+	struct netfs_read_request *rreq = subreq->rreq;
+
+	if (IS_ERR_VALUE(transferred_or_error))
+		subreq->error = transferred_or_error;
+	else
+		subreq->error = 0;
+
+	/* If we decrement nr_wr_ops to 0, the ref belongs to us. */
+	if (atomic_dec_and_test(&rreq->nr_wr_ops))
+		netfs_rreq_unmark_after_write(rreq);
+
+	netfs_put_subrequest(subreq);
+}
+
+/*
+ * Perform any outstanding writes to the cache.  We inherit a ref from the
+ * caller.
+ */
+static void netfs_rreq_do_write_to_cache(struct netfs_read_request *rreq)
+{
+	struct netfs_read_subrequest *subreq, *next, *p;
+	struct iov_iter iter;
+
+	/* We don't want terminating writes trying to wake us up whilst we're
+	 * still going through the list.
+	 */
+	atomic_inc(&rreq->nr_wr_ops);
+
+	list_for_each_entry_safe(subreq, p, &rreq->subrequests, rreq_link) {
+		if (!test_bit(NETFS_SREQ_WRITE_TO_CACHE, &subreq->flags)) {
+			list_del_init(&subreq->rreq_link);
+			netfs_put_subrequest(subreq);
+		}
+	}
+
+	list_for_each_entry(subreq, &rreq->subrequests, rreq_link) {
+		/* Amalgamate adjacent writes */
+		while (!list_is_last(&subreq->rreq_link, &rreq->subrequests)) {
+			next = list_next_entry(subreq, rreq_link);
+			if (next->start > subreq->start + subreq->len)
+				break;
+			subreq->len += next->len;
+			list_del_init(&next->rreq_link);
+			netfs_put_subrequest(next);
+		}
+
+		iov_iter_xarray(&iter, WRITE, &rreq->mapping->i_pages,
+				subreq->start, subreq->len);
+
+		atomic_inc(&rreq->nr_wr_ops);
+		netfs_get_read_subrequest(subreq);
+		fscache_write(&rreq->cache_resources, subreq->start, &iter,
+			      netfs_rreq_copy_terminated, subreq);
+	}
+
+	/* If we decrement nr_wr_ops to 0, the usage ref belongs to us. */
+	if (atomic_dec_and_test(&rreq->nr_wr_ops))
+		netfs_rreq_unmark_after_write(rreq);
+}
+
+static void netfs_rreq_write_to_cache_work(struct work_struct *work)
+{
+	struct netfs_read_request *rreq =
+		container_of(work, struct netfs_read_request, work);
+
+	netfs_rreq_do_write_to_cache(rreq);
+}
+
+static void netfs_rreq_write_to_cache(struct netfs_read_request *rreq)
+{
+	if (in_softirq()) {
+		rreq->work.func = netfs_rreq_write_to_cache_work;
+		if (!queue_work(system_unbound_wq, &rreq->work))
+			BUG();
+	} else {
+		netfs_rreq_do_write_to_cache(rreq);
+	}
+}
+
 /*
  * Unlock the pages in a read operation.  We need to set PG_fscache on any
  * pages we're going to write back before we unlock them.
@@ -258,7 +400,10 @@ static void netfs_rreq_short_read(struct netfs_read_request *rreq,
 
 	netfs_get_read_subrequest(subreq);
 	atomic_inc(&rreq->nr_rd_ops);
-	netfs_read_from_server(rreq, subreq);
+	if (subreq->source == NETFS_READ_FROM_CACHE)
+		netfs_read_from_cache(rreq, subreq, true);
+	else
+		netfs_read_from_server(rreq, subreq);
 }
 
 /*
@@ -299,6 +444,25 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_read_request *rreq)
 	return false;
 }
 
+/*
+ * Check to see if the data read is still valid.
+ */
+static void netfs_rreq_is_still_valid(struct netfs_read_request *rreq)
+{
+	struct netfs_read_subrequest *subreq;
+
+	if (!rreq->netfs_ops->is_still_valid ||
+	    rreq->netfs_ops->is_still_valid(rreq))
+		return;
+
+	list_for_each_entry(subreq, &rreq->subrequests, rreq_link) {
+		if (subreq->source == NETFS_READ_FROM_CACHE) {
+			subreq->error = -ESTALE;
+			__set_bit(NETFS_RREQ_INCOMPLETE_IO, &rreq->flags);
+		}
+	}
+}
+
 /*
  * Assess the state of a read request and decide what to do next.
  *
@@ -308,6 +472,8 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_read_request *rreq)
 static void netfs_rreq_assess(struct netfs_read_request *rreq)
 {
 again:
+	netfs_rreq_is_still_valid(rreq);
+
 	if (!test_bit(NETFS_RREQ_FAILED, &rreq->flags) &&
 	    test_bit(NETFS_RREQ_INCOMPLETE_IO, &rreq->flags)) {
 		if (netfs_rreq_perform_resubmissions(rreq))
@@ -320,6 +486,9 @@ static void netfs_rreq_assess(struct netfs_read_request *rreq)
 	clear_bit_unlock(NETFS_RREQ_IN_PROGRESS, &rreq->flags);
 	wake_up_bit(&rreq->flags, NETFS_RREQ_IN_PROGRESS);
 
+	if (test_bit(NETFS_RREQ_WRITE_TO_CACHE, &rreq->flags))
+		return netfs_rreq_write_to_cache(rreq);
+
 	netfs_rreq_completed(rreq);
 }
 
@@ -434,7 +603,11 @@ static enum netfs_read_source netfs_cache_prepare_read(struct netfs_read_subrequ
 						       loff_t i_size)
 {
 	struct netfs_read_request *rreq = subreq->rreq;
+	struct fscache_op_resources *opr = &rreq->cache_resources;
+	const struct fscache_op_ops *ops = fscache_operation_valid(opr);
 
+	if (ops)
+		return ops->prepare_read(subreq, i_size);
 	if (subreq->start >= rreq->i_size)
 		return NETFS_FILL_WITH_ZEROES;
 	return NETFS_DOWNLOAD_FROM_SERVER;
@@ -524,6 +697,9 @@ static bool netfs_rreq_submit_slice(struct netfs_read_request *rreq,
 	case NETFS_DOWNLOAD_FROM_SERVER:
 		netfs_read_from_server(rreq, subreq);
 		break;
+	case NETFS_READ_FROM_CACHE:
+		netfs_read_from_cache(rreq, subreq, false);
+		break;
 	default:
 		BUG();
 	}
@@ -536,9 +712,24 @@ static bool netfs_rreq_submit_slice(struct netfs_read_request *rreq,
 	return false;
 }
 
+static void netfs_cache_expand_readahead(struct netfs_read_request *rreq,
+					 loff_t *_start, size_t *_len, loff_t i_size)
+{
+	struct fscache_op_resources *opr = &rreq->cache_resources;
+	const struct fscache_op_ops *ops = fscache_operation_valid(opr);
+
+	if (ops)
+		ops->expand_readahead(opr, _start, _len, i_size);
+}
+
 static void netfs_rreq_expand(struct netfs_read_request *rreq,
 			      struct readahead_control *ractl)
 {
+	/* Give the cache a chance to change the request parameters.  The
+	 * resultant request must contain the original region.
+	 */
+	netfs_cache_expand_readahead(rreq, &rreq->start, &rreq->len, rreq->i_size);
+
 	/* Give the netfs a chance to change the request parameters.  The
 	 * resultant request must contain the original region.
 	 */
@@ -600,6 +791,8 @@ void netfs_readahead(struct readahead_control *ractl,
 	rreq->start	= readahead_pos(ractl);
 	rreq->len	= readahead_length(ractl);
 
+	if (ops->begin_cache_operation)
+		ops->begin_cache_operation(rreq);
 	netfs_rreq_expand(rreq, ractl);
 
 	atomic_set(&rreq->nr_rd_ops, 1);
@@ -670,6 +863,8 @@ int netfs_readpage(struct file *file,
 	rreq->start		= page->index * PAGE_SIZE;
 	rreq->len		= thp_size(page);
 
+	if (ops->begin_cache_operation)
+		ops->begin_cache_operation(rreq);
 	netfs_get_read_request(rreq);
 
 	atomic_set(&rreq->nr_rd_ops, 1);
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 38a252b06b54..3c53386e4f6e 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -52,6 +52,7 @@ struct fscache_cookie;
 struct fscache_netfs;
 struct fscache_op_resources;
 struct fscache_op_ops;
+struct netfs_read_subrequest;
 
 typedef void (*fscache_io_terminated_t)(void *priv, ssize_t transferred_or_error);
 
@@ -174,6 +175,16 @@ struct fscache_op_ops {
 		     struct iov_iter *iter,
 		     fscache_io_terminated_t term_func,
 		     void *term_func_priv);
+
+	/* Expand readahead request */
+	void (*expand_readahead)(struct fscache_op_resources *opr,
+				 loff_t *_start, size_t *_len, loff_t i_size);
+
+	/* Prepare a read operation, shortening it to a cached/uncached
+	 * boundary as appropriate.
+	 */
+	enum netfs_read_source (*prepare_read)(struct netfs_read_subrequest *subreq,
+					       loff_t i_size);
 };
 
 /*
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 722b8131a1ea..f2ffea11ea9b 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -12,6 +12,8 @@
 #ifndef _LINUX_NETFS_H
 #define _LINUX_NETFS_H
 
+#include <linux/fscache.h>
+
 enum netfs_read_source {
 	NETFS_FILL_WITH_ZEROES,
 	NETFS_DOWNLOAD_FROM_SERVER,
@@ -47,10 +49,12 @@ struct netfs_read_subrequest {
 struct netfs_read_request {
 	struct inode		*inode;		/* The file being accessed */
 	struct address_space	*mapping;	/* The mapping being accessed */
+	struct fscache_op_resources cache_resources;
 	struct list_head	subrequests;	/* Requests to fetch I/O from disk or net */
 	struct work_struct	work;
 	void			*netfs_priv;	/* Private data for the netfs */
 	atomic_t		nr_rd_ops;	/* Number of read ops in progress */
+	atomic_t		nr_wr_ops;	/* Number of write ops in progress */
 	size_t			submitted;	/* Amount submitted for I/O so far */
 	size_t			len;		/* Length of the request */
 	short			error;		/* 0 or error that occurred */
@@ -73,6 +77,7 @@ struct netfs_read_request {
  */
 struct netfs_read_request_ops {
 	void (*init_rreq)(struct netfs_read_request *rreq, struct file *file);
+	int (*begin_cache_operation)(struct netfs_read_request *rreq);
 	void (*expand_readahead)(struct netfs_read_request *rreq);
 	bool (*clamp_length)(struct netfs_read_subrequest *subreq);
 	void (*issue_op)(struct netfs_read_subrequest *subreq);



  parent reply index

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-20 15:02 [RFC PATCH 00/76] fscache: Modernisation David Howells
2020-11-20 15:02 ` [RFC PATCH 01/76] nfs, cifs, ceph, 9p: Disable use of fscache prior to its rewrite David Howells
2020-11-20 15:02 ` [RFC PATCH 02/76] afs: Disable use of the fscache I/O routines David Howells
2020-11-20 15:03 ` [RFC PATCH 03/76] fscache: Add a cookie debug ID and use that in traces David Howells
2020-11-20 15:03 ` [RFC PATCH 04/76] fscache: Procfile to display cookies David Howells
2020-11-20 15:03 ` [RFC PATCH 05/76] fscache: Remove the old I/O API David Howells
2020-11-20 15:03 ` [RFC PATCH 06/76] fscache: Remove the netfs data from the cookie David Howells
2020-11-20 15:04 ` [RFC PATCH 07/76] fscache: Remove struct fscache_cookie_def David Howells
2020-11-20 15:04 ` [RFC PATCH 08/76] fscache: Remove store_limit* from struct fscache_object David Howells
2020-11-20 15:04 ` [RFC PATCH 09/76] fscache: Remove fscache_check_consistency() David Howells
2020-11-20 15:04 ` [RFC PATCH 10/76] fscache: Remove fscache_attr_changed() David Howells
2020-11-20 15:04 ` [RFC PATCH 11/76] fscache: Remove obsolete stats David Howells
2020-11-20 15:05 ` [RFC PATCH 12/76] fscache: Remove old I/O tracepoints David Howells
2020-11-20 15:05 ` [RFC PATCH 13/76] fscache: Temporarily disable fscache_invalidate() David Howells
2020-11-20 15:05 ` [RFC PATCH 14/76] fscache: Remove the I/O operation manager David Howells
2020-11-20 15:05 ` [RFC PATCH 15/76] fscache: Change %p in format strings to something else David Howells
2020-11-20 15:06 ` [RFC PATCH 16/76] cachefiles: " David Howells
2020-11-20 15:06 ` [RFC PATCH 17/76] iov_iter: Add ITER_XARRAY David Howells
2020-11-20 15:06 ` [RFC PATCH 18/76] vm: Add wait/unlock functions for PG_fscache David Howells
2020-11-20 15:06 ` [RFC PATCH 19/76] mm: Implement readahead_control pageset expansion David Howells
2020-11-20 15:06 ` [RFC PATCH 20/76] mm: Stop generic_file_buffered_read() from grabbing a superfluous page David Howells
2020-11-20 15:07 ` [RFC PATCH 21/76] vfs: Export rw_verify_area() for use by cachefiles David Howells
2020-11-20 15:07 ` [RFC PATCH 22/76] vfs: Provide S_CACHE_FILE inode flag David Howells
2020-11-20 15:07 ` [RFC PATCH 23/76] cachefiles: Remove tree of active files and use " David Howells
2020-11-20 15:07 ` [RFC PATCH 24/76] fscache: Provide a simple thread pool for running ops asynchronously David Howells
2020-11-20 15:08 ` [RFC PATCH 26/76] fscache: Rewrite the I/O API based on iov_iter David Howells
2020-11-20 15:08 ` [RFC PATCH 27/76] fscache: Keep track of size of a file last set independently on the server David Howells
2020-11-20 15:08 ` [RFC PATCH 28/76] fscache, cachefiles: Fix disabled histogram warnings David Howells
2020-11-20 15:08 ` [RFC PATCH 29/76] fscache: Recast assertion in terms of cookie not being an index David Howells
2020-11-20 15:08 ` [RFC PATCH 30/76] vfs, fscache: Force ->write_inode() to occur if cookie pinned for writeback David Howells
2020-11-20 15:09 ` [RFC PATCH 31/76] fscache: Allow ->put_super() to be used to wait for cache operations David Howells
2020-11-20 15:09 ` [RFC PATCH 32/76] netfs: Make a netfs helper module David Howells
2020-11-20 15:09 ` [RFC PATCH 33/76] netfs: Provide readahead and readpage netfs helpers David Howells
2020-11-20 15:09 ` David Howells [this message]
2020-11-20 15:10 ` [RFC PATCH 35/76] fscache: read-helper: Add tracepoints David Howells
2020-11-20 15:10 ` [RFC PATCH 36/76] cachefiles: Remove some redundant checks on unsigned values David Howells
2020-11-20 15:10 ` [RFC PATCH 37/76] cachefiles: trace: Log coherency checks David Howells
2020-11-20 15:10 ` [RFC PATCH 38/76] cachefiles: Split cachefiles_drop_object() up a bit David Howells
2020-11-20 15:11 ` [RFC PATCH 39/76] cachefiles: Implement new fscache I/O backend API David Howells
2020-11-20 15:11 ` [RFC PATCH 40/76] cachefiles: Merge object->backer into object->dentry David Howells
2020-11-20 15:11 ` [RFC PATCH 41/76] cachefiles: Implement a content-present indicator and bitmap David Howells
2020-11-20 15:11 ` [RFC PATCH 42/76] cachefiles: Shape requests from the fscache read helper David Howells
2020-11-20 15:11 ` [RFC PATCH 43/76] cachefiles: Round the cachefile size up to DIO block size David Howells
2020-11-20 15:12 ` [RFC PATCH 44/76] cachefiles: Implement read and write parts of new I/O API David Howells
2020-11-20 15:12 ` [RFC PATCH 45/76] cachefiles: Add I/O tracepoints David Howells
2020-11-20 15:12 ` [RFC PATCH 46/76] fscache: Display cache-specific data in /proc/fs/fscache/objects David Howells
2020-11-20 15:12 ` [RFC PATCH 47/76] fscache: Remove more obsolete stats David Howells
2020-11-20 15:12 ` [RFC PATCH 48/76] fscache: Always create /proc/fs/fscache/stats if configured David Howells
2020-11-20 15:13 ` [RFC PATCH 49/76] netfs: Stats David Howells
2020-11-20 15:13 ` [RFC PATCH 50/76] fscache: New stats David Howells
2020-11-20 15:13 ` [RFC PATCH 51/76] fscache, cachefiles: Rewrite invalidation David Howells
2020-11-20 15:13 ` [RFC PATCH 52/76] fscache: disable cookie when doing an invalidation for DIO write David Howells
2020-11-20 15:13 ` [RFC PATCH 53/76] fscache: Implement "will_modify" parameter on fscache_use_cookie() David Howells
2020-11-20 15:14 ` [RFC PATCH 54/76] fscache: Provide resize operation David Howells
2020-11-20 15:14 ` [RFC PATCH 55/76] fscache: Remove the update operation David Howells
2020-11-20 15:14 ` [RFC PATCH 56/76] afs: Pass page into dirty region helpers to provide THP size David Howells
2020-11-20 15:14 ` [RFC PATCH 57/76] afs: Print the operation debug_id when logging an unexpected data version David Howells
2020-11-20 15:14 ` [RFC PATCH 58/76] afs: Move key to afs_read struct David Howells
2020-11-20 15:15 ` [RFC PATCH 59/76] afs: Don't truncate iter during data fetch David Howells
2020-11-20 15:15 ` [RFC PATCH 60/76] afs: Log remote unmarshalling errors David Howells
2020-11-20 15:15 ` [RFC PATCH 61/76] afs: Set up the iov_iter before calling afs_extract_data() David Howells
2020-11-20 15:15 ` [RFC PATCH 62/76] afs: Use ITER_XARRAY for writing David Howells
2020-11-20 15:16 ` [RFC PATCH 63/76] afs: Wait on PG_fscache before modifying/releasing a page David Howells
2020-11-20 15:16 ` [RFC PATCH 64/76] afs: Extract writeback extension into its own function David Howells
2020-11-20 15:16 ` [RFC PATCH 65/76] afs: Prepare for use of THPs David Howells
2020-11-20 15:16 ` [RFC PATCH 66/76] afs: Use the fs operation ops to handle FetchData completion David Howells
2020-11-20 15:17 ` [RFC PATCH 67/76] afs: Use new fscache read helper API David Howells
2020-11-20 15:17 ` [RFC PATCH 68/76] netfs: Add write_begin helper David Howells
2020-11-20 15:17 ` [RFC PATCH 69/76] fscache: Add support for writing to the cache David Howells
2020-11-20 15:17 ` [RFC PATCH 70/76] afs: Use the fscache_write_begin() helper David Howells
2020-11-20 15:18 ` [RFC PATCH 71/76] afs: Copy local writes to the cache when writing to the server David Howells
2020-11-20 15:18 ` [RFC PATCH 72/76] afs: Invoke fscache_resize_cookie() when handling ATTR_SIZE for setattr David Howells
2020-11-20 15:18 ` [RFC PATCH 73/76] afs: Add O_DIRECT read support David Howells
2020-11-20 15:18 ` [RFC PATCH 74/76] afs: Skip truncation on the server of data we haven't written yet David Howells
2020-11-20 15:19 ` [RFC PATCH 75/76] afs: Make afs_write_begin() return the THP subpage David Howells
2020-11-20 15:19 ` [RFC PATCH 76/76] afs: Fix speculative status fetch going out of order wrt to modifications David Howells

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