[PATCH] docs: vfs: Update struct file_system_type

From: I Hsin Cheng
Date: Sat Mar 22 2025 - 23:47:40 EST


The structure definition now in the kernel adds macros defining the
value of "fs_flags", and the value "FS_NO_DCACHE" no longer exists,
update it to an existing flag value.

Signed-off-by: I Hsin Cheng <richard120310@xxxxxxxxx>
---
Documentation/filesystems/vfs.rst | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index 31eea688609a..4e7fa09ffb6d 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -115,6 +115,14 @@ members are defined:
struct file_system_type {
const char *name;
int fs_flags;
+ #define FS_REQUIRES_DEV 1
+ #define FS_BINARY_MOUNTDATA 2
+ #define FS_HAS_SUBTYPE 4
+ #define FS_USERNS_MOUNT 8 /* Can be mounted by userns root */
+ #define FS_DISALLOW_NOTIFY_PERM 16 /* Disable fanotify permission events */
+ #define FS_ALLOW_IDMAP 32 /* FS has been updated to handle vfs idmappings. */
+ #define FS_MGTIME 64 /* FS uses multigrain timestamps */
+ #define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */
int (*init_fs_context)(struct fs_context *);
const struct fs_parameter_spec *parameters;
struct dentry *(*mount) (struct file_system_type *, int,
@@ -140,7 +148,7 @@ members are defined:
"msdos" and so on

``fs_flags``
- various flags (i.e. FS_REQUIRES_DEV, FS_NO_DCACHE, etc.)
+ various flags (i.e. FS_REQUIRES_DEV, FS_BINARY_MOUNTDATA, etc.)

``init_fs_context``
Initializes 'struct fs_context' ->ops and ->fs_private fields with
--
2.43.0