static int
fs_sis_init(struct fs *_fs, const char *args, const struct fs_settings *set)
{
enum fs_properties props;
const char *parent_name, *parent_args, *error;
if (*args == '\0') {
fs_set_error(_fs, "Parent filesystem not given as parameter");
return -1;
}
parent_args = strchr(args, ':');
if (parent_args == NULL) {
parent_name = args;
parent_args = "";
} else {
parent_name = t_strdup_until(args, parent_args);
parent_args++;
}
if (fs_init(parent_name, parent_args, set, &_fs->parent, &error) < 0) {
fs_set_error(_fs, "%s", error);
return -1;
}
props = fs_get_properties(_fs->parent);
if ((props & FS_SIS_REQUIRED_PROPS) != FS_SIS_REQUIRED_PROPS) {
fs_set_error(_fs, "%s backend can't be used with SIS",
parent_name);
return -1;
}
return 0;
}
static int
fs_sis_queue_init(struct fs *_fs, const char *args,
const struct fs_settings *set)
{
struct sis_queue_fs *fs = (struct sis_queue_fs *)_fs;
const char *p, *parent_name, *parent_args, *error;
/* <queue_dir>:<parent fs>[:<args>] */
p = strchr(args, ':');
if (p == NULL || p[1] == '\0') {
fs_set_error(_fs, "Parent filesystem not given as parameter");
return -1;
}
fs->queue_dir = i_strdup_until(args, p);
parent_name = p + 1;
parent_args = strchr(parent_name, ':');
if (parent_args == NULL)
parent_args = "";
else
parent_name = t_strdup_until(parent_name, parent_args++);
if (fs_init(parent_name, parent_args, set, &fs->super, &error) < 0) {
fs_set_error(_fs, "%s: %s", parent_name, error);
return -1;
}
return 0;
}
static int
fs_compress_init(struct fs *_fs, const char *args, const
struct fs_settings *set)
{
struct compress_fs *fs = (struct compress_fs *)_fs;
const char *p, *compression_name, *level_str, *error;
const char *parent_name, *parent_args;
/* get compression handler name */
p = strchr(args, ':');
if (p == NULL) {
fs_set_error(_fs, "Compression method not given as parameter");
return -1;
}
compression_name = t_strdup_until(args, p++);
args = p;
/* get compression level */
p = strchr(args, ':');
if (p == NULL || p[1] == '\0') {
fs_set_error(_fs, "Parent filesystem not given as parameter");
return -1;
}
level_str = t_strdup_until(args, p++);
if (str_to_uint(level_str, &fs->compress_level) < 0 ||
fs->compress_level < 1 || fs->compress_level > 9) {
fs_set_error(_fs, "Invalid compression level parameter '%s'", level_str);
return -1;
}
args = p;
fs->handler = compression_lookup_handler(compression_name);
if (fs->handler == NULL) {
fs_set_error(_fs, "Compression method '%s' not support", compression_name);
return -1;
}
parent_args = strchr(args, ':');
if (parent_args == NULL) {
parent_name = args;
parent_args = "";
} else {
parent_name = t_strdup_until(args, parent_args);
parent_args++;
}
if (fs_init(parent_name, parent_args, set, &_fs->parent, &error) < 0) {
fs_set_error(_fs, "%s: %s", parent_name, error);
return -1;
}
return 0;
}
static int
fs_sis_open(struct fs *_fs, const char *path, enum fs_open_mode mode,
enum fs_open_flags flags, struct fs_file **file_r)
{
struct sis_fs *fs = (struct sis_fs *)_fs;
struct sis_fs_file *file;
struct fs_file *super;
const char *dir, *hash;
if (mode == FS_OPEN_MODE_APPEND) {
fs_set_error(_fs, "APPEND mode not supported");
return -1;
}
if (fs_open(fs->super, path, mode | flags, &super) < 0) {
fs_sis_copy_error(fs);
return -1;
}
switch (mode) {
case FS_OPEN_MODE_RDONLY:
*file_r = super;
return 0;
case FS_OPEN_MODE_CREATE:
case FS_OPEN_MODE_REPLACE:
break;
case FS_OPEN_MODE_APPEND:
i_unreached();
}
if (fs_sis_path_parse(_fs, path, &dir, &hash) < 0)
return -1;
file = i_new(struct sis_fs_file, 1);
file->file.fs = _fs;
file->file.path = i_strdup(fs_file_path(super));
file->super = super;
file->open_mode = mode;
file->hash = i_strdup(hash);
/* if hashes/<hash> already exists, open it */
file->hash_path = i_strdup_printf("%s/"HASH_DIR_NAME"/%s", dir, hash);
if (fs_open(fs->super, file->hash_path, FS_OPEN_MODE_RDONLY,
&file->hash_file) < 0 && errno != ENOENT) {
i_error("fs-sis: Couldn't open hash file: %s",
fs_last_error(fs->super));
}
if (file->hash_file != NULL) {
file->hash_input =
fs_read_stream(file->hash_file, IO_BLOCK_SIZE);
}
*file_r = &file->file;
return 0;
}
static struct fs_file *
fs_sis_file_init(struct fs *_fs, const char *path,
enum fs_open_mode mode, enum fs_open_flags flags)
{
struct sis_fs *fs = (struct sis_fs *)_fs;
struct sis_fs_file *file;
const char *dir, *hash;
file = i_new(struct sis_fs_file, 1);
file->file.fs = _fs;
file->file.path = i_strdup(path);
file->fs = fs;
file->open_mode = mode;
if (mode == FS_OPEN_MODE_APPEND) {
fs_set_error(_fs, "APPEND mode not supported");
return &file->file;
}
if (fs_sis_path_parse(_fs, path, &dir, &hash) < 0) {
fs_set_error(_fs, "Invalid path");
return &file->file;
}
/* if hashes/<hash> already exists, open it */
file->hash_path = i_strdup_printf("%s/"HASH_DIR_NAME"/%s", dir, hash);
file->hash_file = fs_file_init(_fs->parent, file->hash_path,
FS_OPEN_MODE_READONLY);
file->hash_input = fs_read_stream(file->hash_file, IO_BLOCK_SIZE);
if (i_stream_read(file->hash_input) == -1) {
/* doesn't exist */
if (errno != ENOENT) {
i_error("fs-sis: Couldn't read hash file %s: %m",
file->hash_path);
}
i_stream_destroy(&file->hash_input);
}
file->super = fs_file_init(_fs->parent, path, mode | flags);
return &file->file;
}
static struct fs_file *
fs_sis_queue_file_init(struct fs *_fs, const char *path,
enum fs_open_mode mode, enum fs_open_flags flags)
{
struct sis_queue_fs *fs = (struct sis_queue_fs *)_fs;
struct sis_queue_fs_file *file;
file = i_new(struct sis_queue_fs_file, 1);
file->file.fs = _fs;
file->file.path = i_strdup(path);
file->fs = fs;
if (mode == FS_OPEN_MODE_APPEND)
fs_set_error(_fs, "APPEND mode not supported");
else
file->super = fs_file_init(fs->super, path, mode | flags);
return &file->file;
}
int fs_sis_path_parse(struct fs *fs, const char *path,
const char **dir_r, const char **hash_r)
{
const char *fname, *p;
fname = strrchr(path, '/');
if (fname == NULL) {
*dir_r = ".";
fname = path;
} else {
*dir_r = t_strdup_until(path, fname);
fname++;
}
/* assume filename begins with "<hash>-" */
p = strchr(fname, '-');
if (p == NULL) {
fs_set_error(fs, "open(%s) failed: "
"Filenames must begin with '<hash>-'", path);
return -1;
}
*hash_r = t_strdup_until(fname, p);
return 0;
}
static void fs_sis_queue_copy_error(struct sis_queue_fs *fs)
{
fs_set_error(&fs->fs, "%s", fs_last_error(fs->super));
}
static void fs_sis_copy_error(struct sis_fs *fs)
{
fs_set_error(&fs->fs, "%s", fs_last_error(fs->fs.parent));
}
static int
fs_crypt_init(struct fs *_fs, const char *args, const
struct fs_settings *set)
{
struct crypt_fs *fs = (struct crypt_fs *)_fs;
const char *enc_algo, *set_prefix;
const char *p, *arg, *value, *error, *parent_name, *parent_args;
const char *public_key_path = "", *private_key_path = "", *password = "";
random_init();
if (!dcrypt_initialize("openssl", NULL, &error))
i_fatal("dcrypt_initialize(): %s", error);
/* [algo=<s>:][set_prefix=<n>:][public_key_path=<s>:]
[private_key_path=<s>:[password=<s>:]]<parent fs> */
set_prefix = "mail_crypt_global";
enc_algo = "aes-256-gcm-sha256";
for (;;) {
p = strchr(args, ':');
if (p == NULL) {
fs_set_error(_fs, "Missing parameters");
return -1;
}
arg = t_strdup_until(args, p);
if ((value = strchr(arg, '=')) == NULL)
break;
arg = t_strdup_until(arg, value++);
args = p+1;
if (strcmp(arg, "algo") == 0)
enc_algo = value;
else if (strcmp(arg, "set_prefix") == 0)
set_prefix = value;
else if (strcmp(arg, "public_key_path") == 0)
public_key_path = value;
else if (strcmp(arg, "private_key_path") == 0)
private_key_path = value;
else if (strcmp(arg, "password") == 0)
password = value;
else {
fs_set_error(_fs, "Invalid parameter '%s'", arg);
return -1;
}
}
parent_args = strchr(args, ':');
if (parent_args == NULL) {
parent_name = args;
parent_args = "";
} else {
parent_name = t_strdup_until(args, parent_args);
parent_args++;
}
if (fs_init(parent_name, parent_args, set, &_fs->parent, &error) < 0) {
fs_set_error(_fs, "%s: %s", parent_name, error);
return -1;
}
fs->enc_algo = i_strdup(enc_algo);
fs->set_prefix = i_strdup(set_prefix);
fs->public_key_path = i_strdup_empty(public_key_path);
fs->private_key_path = i_strdup_empty(private_key_path);
fs->password = i_strdup_empty(password);
return 0;
}