linux-kernel - [PATCH] Updating the documentation of struct file_system

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Date:   Tue,  1 Dec 2020 22:05:51 +0100
From:   info@...ocraticnet.de
To:     corbet@....net
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Joris Gutjahr <joris.gutjahr@...tonmail.com>
Subject: [PATCH] Updating the documentation of struct file_system_type

From: Joris Gutjahr <joris.gutjahr@...tonmail.com>

In the documentation of struct file_system_type,
using the definition of the struct of the kernel v5.10-rc6.

Signed-off-by: Joris Gutjahr <joris.gutjahr@...tonmail.com>
---
 Documentation/filesystems/vfs.rst | 28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index ca52c82e5bb5..364ef3dcb649 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -107,22 +107,30 @@ file /proc/filesystems.
 struct file_system_type
 -----------------------
 
-This describes the filesystem.  As of kernel 2.6.39, the following
-members are defined:
+This describes the filesystem.  As of kernel v5.10, the following
+members are defined: (compare: include/linux/fs.h)
 
 .. code-block:: c
 
-	struct file_system_operations {
+	struct file_system_type {
 		const char *name;
 		int fs_flags;
+        int (*init_fs_context)(struct fs_context*);
+        const struct fs_parameter_spec *parameters;
 		struct dentry *(*mount) (struct file_system_type *, int,
 					 const char *, void *);
 		void (*kill_sb) (struct super_block *);
 		struct module *owner;
 		struct file_system_type * next;
-		struct list_head fs_supers;
+		struct hlist_head fs_supers;
 		struct lock_class_key s_lock_key;
 		struct lock_class_key s_umount_key;
+        struct lock_class_key s_vfs_rename_key;
+        struct lock_class_key s_writers_key[SB_FREEZE_LEVELS];
+
+        struct lock_class_key i_lock_key;
+        struct lock_class_key i_mutex_key;
+        struct lock_class_key i_mutex_dir_key;
 	};
 
 ``name``
@@ -132,6 +140,12 @@ members are defined:
 ``fs_flags``
 	various flags (i.e. FS_REQUIRES_DEV, FS_NO_DCACHE, etc.)
 
+``init_fs_context``
+    TODO
+
+``fs_parameter_spec``
+    TODO
+
 ``mount``
 	the method to call when a new instance of this filesystem should
 	be mounted
@@ -148,7 +162,11 @@ members are defined:
 ``next``
 	for internal VFS use: you should initialize this to NULL
 
-  s_lock_key, s_umount_key: lockdep-specific
+``fs_supers``
+    TODO
+
+
+  s_lock_key, s_umount_key, s_vfs_rename_key, s_writers_key, i_lock_key, i_mutex_key, i_mutex_dir_key: lockdep-specific
 
 The mount() method has the following arguments:
 
-- 
2.17.1