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fs: add helper to use mount option as path or fd

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Allow filesystems to use a mount option either as a
file or path.

Link: https://lore.kernel.org/r/20241014-work-overlayfs-v3-1-32b3fed1286e@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2024-10-14 11:40:56 +02:00
parent 8cf0b93919
commit c2f8fde868
2 changed files with 24 additions and 1 deletions
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5
include/linux/fs_parser.h
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@@ -28,7 +28,8 @@ typedef int fs_param_type(struct p_log *,
*/
fs_param_type fs_param_is_bool, fs_param_is_u32, fs_param_is_s32, fs_param_is_u64,
fs_param_is_enum, fs_param_is_string, fs_param_is_blob, fs_param_is_blockdev,
fs_param_is_path, fs_param_is_fd, fs_param_is_uid, fs_param_is_gid;
fs_param_is_path, fs_param_is_fd, fs_param_is_uid, fs_param_is_gid,
fs_param_is_file_or_string;
/*
* Specification of the type of value a parameter wants.
@@ -133,6 +134,8 @@ static inline bool fs_validate_description(const char *name,
#define fsparam_bdev(NAME, OPT) __fsparam(fs_param_is_blockdev, NAME, OPT, 0, NULL)
#define fsparam_path(NAME, OPT) __fsparam(fs_param_is_path, NAME, OPT, 0, NULL)
#define fsparam_fd(NAME, OPT) __fsparam(fs_param_is_fd, NAME, OPT, 0, NULL)
#define fsparam_file_or_string(NAME, OPT) \
__fsparam(fs_param_is_file_or_string, NAME, OPT, 0, NULL)
#define fsparam_uid(NAME, OPT) __fsparam(fs_param_is_uid, NAME, OPT, 0, NULL)
#define fsparam_gid(NAME, OPT) __fsparam(fs_param_is_gid, NAME, OPT, 0, NULL)