diff options
| author | Josef Bacik <josef@toxicpanda.com> | 2024-06-24 15:40:52 -0400 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-06-28 14:36:43 +0200 |
| commit | f9af549d1fd31487bbbc666b5b158cfc940ccc17 (patch) | |
| tree | 11c62f7a1e9239c58bd0ae67737d5d79280b479e /include/uapi/linux/mount.h | |
| parent | c72b6b72240508f2ed9308f0d845e3cd35a92759 (diff) | |
fs: export mount options via statmount()
statmount() can export arbitrary strings, so utilize the __spare1 slot
for a mnt_opts string pointer, and then support asking for and setting
the mount options during statmount(). This calls into the helper for
showing mount options, which already uses a seq_file, so fits in nicely
with our existing mechanism for exporting strings via statmount().
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/3aa6bf8bd5d0a21df9ebd63813af8ab532c18276.1719257716.git.josef@toxicpanda.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
[brauner: only call sb->s_op->show_options()]
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/uapi/linux/mount.h')
| -rw-r--r-- | include/uapi/linux/mount.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/mount.h b/include/uapi/linux/mount.h index ee1559cd6764..225bc366ffcb 100644 --- a/include/uapi/linux/mount.h +++ b/include/uapi/linux/mount.h @@ -154,7 +154,7 @@ struct mount_attr { */ struct statmount { __u32 size; /* Total size, including strings */ - __u32 __spare1; + __u32 mnt_opts; /* [str] Mount options of the mount */ __u64 mask; /* What results were written */ __u32 sb_dev_major; /* Device ID */ __u32 sb_dev_minor; @@ -206,6 +206,7 @@ struct mnt_id_req { #define STATMOUNT_MNT_POINT 0x00000010U /* Want/got mnt_point */ #define STATMOUNT_FS_TYPE 0x00000020U /* Want/got fs_type */ #define STATMOUNT_MNT_NS_ID 0x00000040U /* Want/got mnt_ns_id */ +#define STATMOUNT_MNT_OPTS 0x00000080U /* Want/got mnt_opts */ /* * Special @mnt_id values that can be passed to listmount |