linux-kernel - [PATCH] fs/9p: Add new options to Documentation

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Date:   Mon, 27 Mar 2023 03:05:52 +0000
From:   Eric Van Hensbergen <ericvh@...nel.org>
To:     v9fs-developer@...ts.sourceforge.net
Cc:     asmadeus@...ewreck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux_oss@...debyte.com
Subject: [PATCH] fs/9p: Add new options to Documentation

Need to update the documentation for new mount flags
and cache modes.

Signed-off-by: Eric Van Hensbergen <ericvh@...nel.org>
---
 Documentation/filesystems/9p.rst | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/Documentation/filesystems/9p.rst b/Documentation/filesystems/9p.rst
index 0e800b8f73cc..6d257854a02a 100644
--- a/Documentation/filesystems/9p.rst
+++ b/Documentation/filesystems/9p.rst
@@ -78,19 +78,18 @@ Options
   		offering several exported file systems.
 
   cache=mode	specifies a caching policy.  By default, no caches are used.
-
-                        none
-				default no cache policy, metadata and data
-                                alike are synchronous.
-			loose
-				no attempts are made at consistency,
-                                intended for exclusive, read-only mounts
-                        fscache
-				use FS-Cache for a persistent, read-only
-				cache backend.
-                        mmap
-				minimal cache that is only used for read-write
-                                mmap.  Northing else is cached, like cache=none
+		Modes are progressive and inclusive.  For example, specifying fscache
+		will use loose caches, writeback, and readahead.  Due to their
+		inclusive nature, only one cache mode can be specified per mount.
+
+			=========	=============================================
+			none		no cache of file or metadata
+			readahead	readahead caching of files
+			writeback	delayed writeback of files
+			mmap		support mmap operations read/write with cache
+			loose		meta-data and file cache with no coherency
+			fscache		use FS-Cache for a persistent cache backend
+			=========	=============================================
 
   debug=n	specifies debug level.  The debug level is a bitmask.
 
@@ -137,6 +136,10 @@ Options
   		This can be used to share devices/named pipes/sockets between
 		hosts.  This functionality will be expanded in later versions.
 
+  directio	bypass page cache on all read/write operations
+
+  ignoreqv	ignore qid.version==0 as a marker to ignore cache
+
   noxattr	do not offer xattr functions on this mount.
 
   access	there are four access modes.
-- 
2.39.2