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fs_parse: get rid of ->enums

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Don't do a single array; attach them to fsparam_enum() entry
instead.  And don't bother trying to embed the names into those -
it actually loses memory, with no real speedup worth mentioning.

Simplifies validation as well.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-09-06 22:12:08 -04:00
parent 0f89589a8c
commit 2710c957a8
9 changed files with 121 additions and 167 deletions
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72
fs/fs_parser.c
View file

@ -189,9 +189,8 @@ int fs_parse(struct fs_context *fc,
goto maybe_okay;
case fs_param_is_enum:
for (e = desc->enums; e->name[0]; e++) {
if (e->opt == p->opt &&
strcmp(e->name, param->string) == 0) {
for (e = p->data; e->name; e++) {
if (strcmp(e->name, param->string) == 0) {
result->uint_32 = e->value;
goto okay;
}
@ -359,10 +358,8 @@ bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
bool fs_validate_description(const struct fs_parameter_description *desc)
{
const struct fs_parameter_spec *param, *p2;
const struct fs_parameter_enum *e;
const char *name = desc->name;
unsigned int nr_params = 0;
bool good = true, enums = false;
bool good = true;
pr_notice("*** VALIDATE %s ***\n", name);
@ -383,7 +380,12 @@ bool fs_validate_description(const struct fs_parameter_description *desc)
name, param->name, t);
good = false;
} else if (t == fs_param_is_enum) {
enums = true;
const struct fs_parameter_enum *e = param->data;
if (!e || !e->name) {
pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
name, param->name);
good = false;
}
}
/* Check for duplicate parameter names */
@ -395,63 +397,7 @@ bool fs_validate_description(const struct fs_parameter_description *desc)
}
}
}
nr_params = param - desc->specs;
}
if (desc->enums) {
if (!nr_params) {
pr_err("VALIDATE %s: Enum table but no parameters\n",
name);
good = false;
goto no_enums;
}
if (!enums) {
pr_err("VALIDATE %s: Enum table but no enum-type values\n",
name);
good = false;
goto no_enums;
}
for (e = desc->enums; e->name[0]; e++) {
/* Check that all entries in the enum table have at
* least one parameter that uses them.
*/
for (param = desc->specs; param->name; param++) {
if (param->opt == e->opt &&
param->type != fs_param_is_enum) {
pr_err("VALIDATE %s: e[%tu] enum val for %s\n",
name, e - desc->enums, param->name);
good = false;
}
}
}
/* Check that all enum-type parameters have at least one enum
* value in the enum table.
*/
for (param = desc->specs; param->name; param++) {
if (param->type != fs_param_is_enum)
continue;
for (e = desc->enums; e->name[0]; e++)
if (e->opt == param->opt)
break;
if (!e->name[0]) {
pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
name, param->name);
good = false;
}
}
} else {
if (enums) {
pr_err("VALIDATE %s: enum-type values, but no enum table\n",
name);
good = false;
goto no_enums;
}
}
no_enums:
return good;
}
#endif /* CONFIG_VALIDATE_FS_PARSER */