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-rw-r--r--fs/fs_parser.c142
1 files changed, 58 insertions, 84 deletions
diff --git a/fs/fs_parser.c b/fs/fs_parser.c
index 5f8c06a1fb93..db940fac84c3 100644
--- a/fs/fs_parser.c
+++ b/fs/fs_parser.c
@@ -46,19 +46,40 @@ int lookup_constant(const struct constant_table *tbl, const char *name, int not_
}
EXPORT_SYMBOL(lookup_constant);
+static inline bool is_flag(const struct fs_parameter_spec *p)
+{
+ return p->type == fs_param_is_flag;
+}
+
static const struct fs_parameter_spec *fs_lookup_key(
const struct fs_parameter_spec *desc,
- const char *name)
+ struct fs_parameter *param, bool *negated)
{
- const struct fs_parameter_spec *p;
- if (!desc)
- return NULL;
-
- for (p = desc; p->name; p++)
- if (strcmp(p->name, name) == 0)
+ const struct fs_parameter_spec *p, *other = NULL;
+ const char *name = param->key;
+ bool want_flag = param->type == fs_value_is_flag;
+
+ *negated = false;
+ for (p = desc; p->name; p++) {
+ if (strcmp(p->name, name) != 0)
+ continue;
+ if (likely(is_flag(p) == want_flag))
return p;
-
- return NULL;
+ other = p;
+ }
+ if (want_flag) {
+ if (name[0] == 'n' && name[1] == 'o' && name[2]) {
+ for (p = desc; p->name; p++) {
+ if (strcmp(p->name, name + 2) != 0)
+ continue;
+ if (!(p->flags & fs_param_neg_with_no))
+ continue;
+ *negated = true;
+ return p;
+ }
+ }
+ }
+ return other;
}
/*
@@ -88,123 +109,77 @@ int __fs_parse(struct p_log *log,
const struct constant_table *e;
int ret = -ENOPARAM, b;
- result->negated = false;
result->uint_64 = 0;
- p = fs_lookup_key(desc, param->key);
- if (!p) {
- /* If we didn't find something that looks like "noxxx", see if
- * "xxx" takes the "no"-form negative - but only if there
- * wasn't an value.
- */
- if (param->type != fs_value_is_flag)
- goto unknown_parameter;
- if (param->key[0] != 'n' || param->key[1] != 'o' || !param->key[2])
- goto unknown_parameter;
-
- p = fs_lookup_key(desc, param->key + 2);
- if (!p)
- goto unknown_parameter;
- if (!(p->flags & fs_param_neg_with_no))
- goto unknown_parameter;
- result->boolean = false;
- result->negated = true;
- }
+ p = fs_lookup_key(desc, param, &result->negated);
+ if (!p)
+ return -ENOPARAM;
if (p->flags & fs_param_deprecated)
warn_plog(log, "Deprecated parameter '%s'", param->key);
- if (result->negated)
- goto okay;
-
- /* Certain parameter types only take a string and convert it. */
- switch (p->type) {
- case __fs_param_wasnt_defined:
- return -EINVAL;
- case fs_param_is_u32:
- case fs_param_is_u32_octal:
- case fs_param_is_u32_hex:
- case fs_param_is_s32:
- case fs_param_is_u64:
- case fs_param_is_enum:
- case fs_param_is_string:
- if (param->type == fs_value_is_string) {
- if (p->flags & fs_param_v_optional)
- break;
- if (!*param->string)
- goto bad_value;
- break;
- }
- if (param->type == fs_value_is_flag) {
- if (p->flags & fs_param_v_optional)
- goto okay;
- }
- goto bad_value;
- default:
- break;
- }
-
/* Try to turn the type we were given into the type desired by the
* parameter and give an error if we can't.
*/
switch (p->type) {
+ case __fs_param_wasnt_defined:
+ return -EINVAL;
case fs_param_is_flag:
if (param->type != fs_value_is_flag)
return inval_plog(log, "Unexpected value for '%s'",
param->key);
- result->boolean = true;
+ result->boolean = !result->negated;
goto okay;
-
case fs_param_is_bool:
- switch (param->type) {
- case fs_value_is_flag:
- result->boolean = true;
- goto okay;
- case fs_value_is_string:
- if (param->size == 0) {
- result->boolean = true;
- goto okay;
- }
- b = lookup_constant(bool_names, param->string, -1);
- if (b == -1)
- goto bad_value;
- result->boolean = b;
- goto okay;
- default:
+ if (param->type != fs_value_is_string)
goto bad_value;
- }
-
+ b = lookup_constant(bool_names, param->string, -1);
+ if (b == -1)
+ goto bad_value;
+ result->boolean = b;
+ goto okay;
case fs_param_is_u32:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
ret = kstrtouint(param->string, 0, &result->uint_32);
goto maybe_okay;
case fs_param_is_u32_octal:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
ret = kstrtouint(param->string, 8, &result->uint_32);
goto maybe_okay;
case fs_param_is_u32_hex:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
ret = kstrtouint(param->string, 16, &result->uint_32);
goto maybe_okay;
case fs_param_is_s32:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
ret = kstrtoint(param->string, 0, &result->int_32);
goto maybe_okay;
case fs_param_is_u64:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
ret = kstrtoull(param->string, 0, &result->uint_64);
goto maybe_okay;
-
case fs_param_is_enum:
+ if (param->type != fs_value_is_string)
+ goto bad_value;
e = __lookup_constant(p->data, param->string);
if (e) {
result->uint_32 = e->value;
goto okay;
}
goto bad_value;
-
case fs_param_is_string:
+ if (param->type != fs_value_is_string || !*param->string)
+ goto bad_value;
goto okay;
case fs_param_is_blob:
if (param->type != fs_value_is_blob)
goto bad_value;
goto okay;
-
case fs_param_is_fd: {
switch (param->type) {
case fs_value_is_string:
@@ -221,7 +196,6 @@ int __fs_parse(struct p_log *log,
goto bad_value;
goto maybe_okay;
}
-
case fs_param_is_blockdev:
case fs_param_is_path:
goto okay;
@@ -237,8 +211,6 @@ okay:
bad_value:
return inval_plog(log, "Bad value for '%s'", param->key);
-unknown_parameter:
- return -ENOPARAM;
}
EXPORT_SYMBOL(__fs_parse);
@@ -382,6 +354,8 @@ bool fs_validate_description(const char *name,
/* Check for duplicate parameter names */
for (p2 = desc; p2 < param; p2++) {
if (strcmp(param->name, p2->name) == 0) {
+ if (is_flag(param) != is_flag(p2))
+ continue;
pr_err("VALIDATE %s: PARAM[%s]: Duplicate\n",
name, param->name);
good = false;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 09:49:49 +0100