#include "strv.h"
#include "utf8.h"
#include "btrfs-util.h"
+#include "path-util.h"
#include "image.h"
-#include "bus-label.h"
+
+static const char image_search_path[] =
+ "/var/lib/machines\0"
+ "/var/lib/container\0"
+ "/usr/local/lib/machines\0"
+ "/usr/lib/machines\0";
Image *image_unref(Image *i) {
if (!i)
return NULL;
}
-static int add_image(
- Hashmap *h,
+static int image_new(
ImageType t,
- const char *name,
+ const char *pretty,
const char *path,
+ const char *filename,
bool read_only,
+ usec_t crtime,
usec_t mtime,
- usec_t btime) {
+ Image **ret) {
_cleanup_(image_unrefp) Image *i = NULL;
- int r;
- assert(h);
assert(t >= 0);
assert(t < _IMAGE_TYPE_MAX);
- assert(name);
+ assert(pretty);
+ assert(filename);
+ assert(ret);
- i = new(Image, 1);
+ i = new0(Image, 1);
if (!i)
return -ENOMEM;
i->type = t;
i->read_only = read_only;
+ i->crtime = crtime;
i->mtime = mtime;
- i->btime = btime;
- i->name = strdup(name);
+ i->name = strdup(pretty);
if (!i->name)
return -ENOMEM;
- if (path) {
- i->path = strdup(path);
- if (!i->path)
- return -ENOMEM;
- }
+ if (path)
+ i->path = strjoin(path, "/", filename, NULL);
+ else
+ i->path = strdup(filename);
+
+ if (!i->path)
+ return -ENOMEM;
- r = hashmap_put(h, i->name, i);
- if (r < 0)
- return r;
+ path_kill_slashes(i->path);
+ *ret = i;
i = NULL;
+
return 0;
}
-int image_discover(Hashmap *h) {
+static int image_make(
+ const char *pretty,
+ int dfd,
+ const char *path,
+ const char *filename,
+ Image **ret) {
+
+ struct stat st;
+ bool read_only;
+ int r;
+
+ assert(filename);
+
+ /* We explicitly *do* follow symlinks here, since we want to
+ * allow symlinking trees into /var/lib/container/, and treat
+ * them normally. */
+
+ if (fstatat(dfd, filename, &st, 0) < 0)
+ return -errno;
+
+ read_only =
+ (path && path_startswith(path, "/usr")) ||
+ (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS);
+
+ if (S_ISDIR(st.st_mode)) {
+
+ if (!ret)
+ return 1;
+
+ if (!pretty)
+ pretty = filename;
+
+ /* btrfs subvolumes have inode 256 */
+ if (st.st_ino == 256) {
+ _cleanup_close_ int fd = -1;
+ struct statfs sfs;
+
+ fd = openat(dfd, filename, O_CLOEXEC|O_NOCTTY|O_DIRECTORY);
+ if (fd < 0)
+ return -errno;
+
+ if (fstatfs(fd, &sfs) < 0)
+ return -errno;
+
+ if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC)) {
+ BtrfsSubvolInfo info;
+
+ /* It's a btrfs subvolume */
+
+ r = btrfs_subvol_get_info_fd(fd, &info);
+ if (r < 0)
+ return r;
+
+ r = image_new(IMAGE_SUBVOLUME,
+ pretty,
+ path,
+ filename,
+ info.read_only || read_only,
+ info.otime,
+ 0,
+ ret);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+ }
+
+ /* It's just a normal directory. */
+
+ r = image_new(IMAGE_DIRECTORY,
+ pretty,
+ path,
+ filename,
+ read_only,
+ 0,
+ 0,
+ ret);
+ if (r < 0)
+ return r;
+
+ return 1;
+
+ } else if (S_ISREG(st.st_mode) && endswith(filename, ".gpt")) {
+ usec_t crtime = 0;
+
+ /* It's a GPT block device */
+
+ if (!ret)
+ return 1;
+
+ fd_getcrtime_at(dfd, filename, &crtime, 0);
+
+ if (!pretty)
+ pretty = strndupa(filename, strlen(filename) - 4);
+
+ r = image_new(IMAGE_GPT,
+ pretty,
+ path,
+ filename,
+ !(st.st_mode & 0222) || read_only,
+ crtime,
+ timespec_load(&st.st_mtim),
+ ret);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ return 0;
+}
+
+int image_find(const char *name, Image **ret) {
const char *path;
int r;
- assert(h);
+ assert(name);
- FOREACH_STRING(path, "/var/lib/container", "/var/lib/machine") {
+ /* There are no images with invalid names */
+ if (!image_name_is_valid(name))
+ return 0;
+
+ NULSTR_FOREACH(path, image_search_path) {
_cleanup_closedir_ DIR *d = NULL;
- struct dirent *de;
d = opendir(path);
if (!d) {
if (errno == ENOENT)
- return 0;
+ continue;
return -errno;
}
- FOREACH_DIRENT_ALL(de, d, return -errno) {
- struct stat st;
-
- if (STR_IN_SET(de->d_name, ".", ".."))
- continue;
-
- /* Temporary files for atomically creating new files */
- if (startswith(de->d_name, ".#"))
- continue;
+ r = image_make(NULL, dirfd(d), path, name, ret);
+ if (r == 0 || r == -ENOENT) {
+ _cleanup_free_ char *gpt = NULL;
- if (string_has_cc(de->d_name, NULL))
- continue;
+ gpt = strappend(name, ".gpt");
+ if (!gpt)
+ return -ENOMEM;
- if (!utf8_is_valid(de->d_name))
+ r = image_make(NULL, dirfd(d), path, gpt, ret);
+ if (r == 0 || r == -ENOENT)
continue;
+ }
+ if (r < 0)
+ return r;
- if (hashmap_contains(h, de->d_name))
- continue;
+ return 1;
+ }
- /* We explicitly *do* follow symlinks here,
- * since we want to allow symlinking trees
- * into /var/lib/container/, and treat them
- * normally. */
- if (fstatat(dirfd(d), de->d_name, &st, 0) < 0) {
- if (errno == ENOENT)
- continue;
+ if (streq(name, ".host"))
+ return image_make(".host", AT_FDCWD, NULL, "/", ret);
- return -errno;
- }
-
- if (S_ISDIR(st.st_mode)) {
+ return 0;
+};
- /* btrfs subvolumes have inode 256 */
- if (st.st_ino == 256) {
- _cleanup_close_ int fd = -1;
- struct statfs sfs;
+int image_discover(Hashmap *h) {
+ const char *path;
+ int r;
- fd = openat(dirfd(d), de->d_name, O_CLOEXEC|O_NOCTTY|O_DIRECTORY);
- if (fd < 0) {
- if (errno == ENOENT)
- continue;
+ assert(h);
- return -errno;
- }
+ NULSTR_FOREACH(path, image_search_path) {
+ _cleanup_closedir_ DIR *d = NULL;
+ struct dirent *de;
- if (fstatfs(fd, &sfs) < 0)
- return -errno;
+ d = opendir(path);
+ if (!d) {
+ if (errno == ENOENT)
+ continue;
- if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC)) {
- usec_t btime = 0;
- int ro;
+ return -errno;
+ }
- /* It's a btrfs subvolume */
+ FOREACH_DIRENT_ALL(de, d, return -errno) {
+ _cleanup_(image_unrefp) Image *image = NULL;
- ro = btrfs_subvol_is_read_only_fd(fd);
- if (ro < 0)
- return ro;
+ if (!image_name_is_valid(de->d_name))
+ continue;
- /* r = btrfs_subvol_get_btime(fd, &btime); */
- /* if (r < 0) */
- /* return r; */
+ if (hashmap_contains(h, de->d_name))
+ continue;
- r = add_image(h,
- IMAGE_SUBVOLUME,
- de->d_name,
- path,
- ro,
- 0,
- btime);
+ r = image_make(NULL, dirfd(d), path, de->d_name, &image);
+ if (r == 0 || r == -ENOENT)
+ continue;
+ if (r < 0)
+ return r;
- if (r < 0)
- return r;
+ r = hashmap_put(h, image->name, image);
+ if (r < 0)
+ return r;
- continue;
- }
- }
+ image = NULL;
+ }
+ }
- /* It's just a normal directory. */
+ if (!hashmap_contains(h, ".host")) {
+ _cleanup_(image_unrefp) Image *image = NULL;
- r = add_image(h,
- IMAGE_DIRECTORY,
- de->d_name,
- path,
- false,
- 0,
- 0);
- if (r < 0)
- return r;
+ r = image_make(".host", AT_FDCWD, NULL, "/", &image);
+ if (r < 0)
+ return r;
- } else if (S_ISREG(st.st_mode) &&
- endswith(de->d_name, ".gpt")) {
+ r = hashmap_put(h, image->name, image);
+ if (r < 0)
+ return r;
- /* It's a GPT block device */
+ image = NULL;
- r = add_image(h,
- IMAGE_GPT,
- de->d_name,
- path,
- !!(st.st_mode & 0111),
- timespec_load(&st.st_mtim),
- 0);
- if (r < 0)
- return r;
- }
- }
}
return 0;
hashmap_free(map);
}
-char *image_bus_path(const char *name) {
- _cleanup_free_ char *e = NULL;
-
- assert(name);
-
- e = bus_label_escape(name);
- if (!e)
- return NULL;
-
- return strappend("/org/freedesktop/machine1/image/", e);
-}
-
static const char* const image_type_table[_IMAGE_TYPE_MAX] = {
[IMAGE_DIRECTORY] = "directory",
[IMAGE_SUBVOLUME] = "subvolume",
~ianmdlvl / elogind.git / blobdiff