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Diffstat (limited to 'include/linux/fs_parser.h')
-rw-r--r--include/linux/fs_parser.h101
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 */