diff options
Diffstat (limited to 'include/linux/fs_parser.h')
| -rw-r--r-- | include/linux/fs_parser.h | 101 |
1 files changed, 44 insertions, 57 deletions
diff --git a/include/linux/fs_parser.h b/include/linux/fs_parser.h index dee140db6240..2eab6d5f6736 100644 --- a/include/linux/fs_parser.h +++ b/include/linux/fs_parser.h @@ -17,26 +17,18 @@ struct constant_table { int value; }; +struct fs_parameter_spec; +struct fs_parse_result; +typedef int fs_param_type(struct p_log *, + const struct fs_parameter_spec *, + struct fs_parameter *, + struct fs_parse_result *); /* * The type of parameter expected. */ -enum fs_parameter_type { - __fs_param_wasnt_defined, - fs_param_is_flag, - fs_param_is_bool, - fs_param_is_u32, - fs_param_is_u32_octal, - fs_param_is_u32_hex, - 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, - nr__fs_parameter_type, -}; +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; /* * Specification of the type of value a parameter wants. @@ -46,25 +38,13 @@ enum fs_parameter_type { */ struct fs_parameter_spec { const char *name; + fs_param_type *type; /* The desired parameter type */ u8 opt; /* Option number (returned by fs_parse()) */ - enum fs_parameter_type type:8; /* The desired parameter type */ unsigned short flags; -#define fs_param_v_optional 0x0001 /* The value is optional */ #define fs_param_neg_with_no 0x0002 /* "noxxx" is negative param */ #define fs_param_neg_with_empty 0x0004 /* "xxx=" is negative param */ #define fs_param_deprecated 0x0008 /* The param is deprecated */ -}; - -struct fs_parameter_enum { - u8 opt; /* Option number (as fs_parameter_spec::opt) */ - char name[14]; - u8 value; -}; - -struct fs_parameter_description { - const char name[16]; /* Name for logging purposes */ - const struct fs_parameter_spec *specs; /* List of param specifications */ - const struct fs_parameter_enum *enums; /* Enum values */ + const void *data; }; /* @@ -72,7 +52,6 @@ struct fs_parameter_description { */ struct fs_parse_result { bool negated; /* T if param was "noxxx" */ - bool has_value; /* T if value supplied to param */ union { bool boolean; /* For spec_bool */ int int_32; /* For spec_s32/spec_enum */ @@ -81,28 +60,37 @@ struct fs_parse_result { }; }; -extern int fs_parse(struct fs_context *fc, - const struct fs_parameter_description *desc, +extern int __fs_parse(struct p_log *log, + const struct fs_parameter_spec *desc, struct fs_parameter *value, struct fs_parse_result *result); + +static inline int fs_parse(struct fs_context *fc, + const struct fs_parameter_spec *desc, + struct fs_parameter *param, + struct fs_parse_result *result) +{ + return __fs_parse(&fc->log, desc, param, result); +} + extern int fs_lookup_param(struct fs_context *fc, struct fs_parameter *param, bool want_bdev, struct path *_path); -extern int __lookup_constant(const struct constant_table tbl[], size_t tbl_size, - const char *name, int not_found); -#define lookup_constant(t, n, nf) __lookup_constant(t, ARRAY_SIZE(t), (n), (nf)) +extern int lookup_constant(const struct constant_table tbl[], const char *name, int not_found); #ifdef CONFIG_VALIDATE_FS_PARSER extern bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size, int low, int high, int special); -extern bool fs_validate_description(const struct fs_parameter_description *desc); +extern bool fs_validate_description(const char *name, + const struct fs_parameter_spec *desc); #else static inline bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size, int low, int high, int special) { return true; } -static inline bool fs_validate_description(const struct fs_parameter_description *desc) +static inline bool fs_validate_description(const char *name, + const struct fs_parameter_spec *desc) { return true; } #endif @@ -115,33 +103,32 @@ static inline bool fs_validate_description(const struct fs_parameter_description * work, but any such case is probably a sign that new helper is needed. * Helpers will remain stable; low-level implementation may change. */ -#define __fsparam(TYPE, NAME, OPT, FLAGS) \ +#define __fsparam(TYPE, NAME, OPT, FLAGS, DATA) \ { \ .name = NAME, \ .opt = OPT, \ .type = TYPE, \ - .flags = FLAGS \ + .flags = FLAGS, \ + .data = DATA \ } -#define fsparam_flag(NAME, OPT) __fsparam(fs_param_is_flag, NAME, OPT, 0) +#define fsparam_flag(NAME, OPT) __fsparam(NULL, NAME, OPT, 0, NULL) #define fsparam_flag_no(NAME, OPT) \ - __fsparam(fs_param_is_flag, NAME, OPT, \ - fs_param_neg_with_no) -#define fsparam_bool(NAME, OPT) __fsparam(fs_param_is_bool, NAME, OPT, 0) -#define fsparam_u32(NAME, OPT) __fsparam(fs_param_is_u32, NAME, OPT, 0) + __fsparam(NULL, NAME, OPT, fs_param_neg_with_no, NULL) +#define fsparam_bool(NAME, OPT) __fsparam(fs_param_is_bool, NAME, OPT, 0, NULL) +#define fsparam_u32(NAME, OPT) __fsparam(fs_param_is_u32, NAME, OPT, 0, NULL) #define fsparam_u32oct(NAME, OPT) \ - __fsparam(fs_param_is_u32_octal, NAME, OPT, 0) + __fsparam(fs_param_is_u32, NAME, OPT, 0, (void *)8) #define fsparam_u32hex(NAME, OPT) \ - __fsparam(fs_param_is_u32_hex, NAME, OPT, 0) -#define fsparam_s32(NAME, OPT) __fsparam(fs_param_is_s32, NAME, OPT, 0) -#define fsparam_u64(NAME, OPT) __fsparam(fs_param_is_u64, NAME, OPT, 0) -#define fsparam_enum(NAME, OPT) __fsparam(fs_param_is_enum, NAME, OPT, 0) + __fsparam(fs_param_is_u32_hex, NAME, OPT, 0, (void *16)) +#define fsparam_s32(NAME, OPT) __fsparam(fs_param_is_s32, NAME, OPT, 0, NULL) +#define fsparam_u64(NAME, OPT) __fsparam(fs_param_is_u64, NAME, OPT, 0, NULL) +#define fsparam_enum(NAME, OPT, array) __fsparam(fs_param_is_enum, NAME, OPT, 0, array) #define fsparam_string(NAME, OPT) \ - __fsparam(fs_param_is_string, NAME, OPT, 0) -#define fsparam_blob(NAME, OPT) __fsparam(fs_param_is_blob, NAME, OPT, 0) -#define fsparam_bdev(NAME, OPT) __fsparam(fs_param_is_blockdev, NAME, OPT, 0) -#define fsparam_path(NAME, OPT) __fsparam(fs_param_is_path, NAME, OPT, 0) -#define fsparam_fd(NAME, OPT) __fsparam(fs_param_is_fd, NAME, OPT, 0) - + __fsparam(fs_param_is_string, NAME, OPT, 0, NULL) +#define fsparam_blob(NAME, OPT) __fsparam(fs_param_is_blob, NAME, OPT, 0, NULL) +#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) #endif /* _LINUX_FS_PARSER_H */ |