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Subject[PATCH] Updating the documentation of struct file_system_type
Date
From: Joris Gutjahr <joris.gutjahr@protonmail.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@protonmail.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
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