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// SPDX-License-Identifier: GPL-2.0-only
#define pr_fmt(fmt) "file_list: " fmt
#include <common.h>
#include <malloc.h>
#include <fs.h>
#include <file-list.h>
#include <stringlist.h>
#include <linux/err.h>
#define PARSE_DEVICE 0
#define PARSE_NAME 1
#define PARSE_FLAGS 2
struct file_list_entry *file_list_entry_by_name(struct file_list *files, const char *name)
{
struct file_list_entry *entry;
file_list_for_each_entry(files, entry) {
if (!strcmp(entry->name, name))
return entry;
}
return NULL;
}
int file_list_add_entry(struct file_list *files, const char *name, const char *filename,
unsigned long flags)
{
struct file_list_entry *entry;
entry = file_list_entry_by_name(files, name);
if (entry)
return -EEXIST;
entry = xzalloc(sizeof(*entry));
entry->name = xstrdup(name);
entry->filename = xstrdup(filename);
entry->flags = flags;
list_add_tail(&entry->list, &files->list);
return 0;
}
static int file_list_parse_one(struct file_list *files, const char *partstr, const char **endstr)
{
int i = 0, state = PARSE_DEVICE;
char filename[PATH_MAX];
char name[PATH_MAX];
unsigned long flags = 0;
memset(filename, 0, sizeof(filename));
memset(name, 0, sizeof(name));
while (*partstr && *partstr != ',') {
switch (state) {
case PARSE_DEVICE:
if (*partstr == '(') {
state = PARSE_NAME;
i = 0;
} else {
filename[i++] = *partstr;
}
break;
case PARSE_NAME:
if (*partstr == ')') {
state = PARSE_FLAGS;
i = 0;
} else {
name[i++] = *partstr;
}
break;
case PARSE_FLAGS:
switch (*partstr) {
case 's':
flags |= FILE_LIST_FLAG_SAFE;
break;
case 'r':
flags |= FILE_LIST_FLAG_READBACK;
break;
case 'c':
flags |= FILE_LIST_FLAG_CREATE;
break;
case 'u':
flags |= FILE_LIST_FLAG_UBI;
break;
default:
pr_err("Unknown flag '%c'\n", *partstr);
return -EINVAL;
}
break;
default:
return -EINVAL;
}
partstr++;
}
if (state != PARSE_FLAGS) {
pr_err("Missing ')'\n");
return -EINVAL;
}
if (*partstr == ',')
partstr++;
*endstr = partstr;
return file_list_add_entry(files, name, filename, flags);
}
static const char *flags_to_str(int flags)
{
static char str[sizeof "srcu"];
char *s = str;;
if (flags & FILE_LIST_FLAG_SAFE)
*s++ = 's';
if (flags & FILE_LIST_FLAG_READBACK)
*s++ = 'r';
if (flags & FILE_LIST_FLAG_CREATE)
*s++ = 'c';
if (flags & FILE_LIST_FLAG_UBI)
*s++ = 'u';
*s = '\0';
return str;
}
struct file_list *file_list_parse(const char *str)
{
struct file_list *files;
int ret;
const char *endptr;
files = xzalloc(sizeof(*files));
INIT_LIST_HEAD(&files->list);
while (*str) {
ret = file_list_parse_one(files, str, &endptr);
if (ret) {
pr_err("parse error\n");
goto out;
}
str = endptr;
files->num_entries++;
}
return files;
out:
file_list_free(files);
return ERR_PTR(ret);
}
void file_list_free(struct file_list *files)
{
struct file_list_entry *entry, *tmp;
list_for_each_entry_safe(entry, tmp, &files->list, list) {
free(entry->name);
free(entry->filename);
free(entry);
}
free(files);
}
char *file_list_to_str(const struct file_list *files)
{
struct file_list_entry *entry;
struct string_list sl;
char *str;
if (!files)
return strdup("");
string_list_init(&sl);
list_for_each_entry(entry, &files->list, list) {
int ret = string_list_add_asprintf(&sl, "%s(%s)%s", entry->filename, entry->name,
flags_to_str(entry->flags));
if (ret) {
str = ERR_PTR(ret);
goto out;
}
}
str = string_list_join(&sl, ",");
out:
string_list_free(&sl);
return str;
}
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