src/shared/device-nodes.h \
src/shared/util.c \
src/shared/util.h \
- src/shared/rm-rf.c \
- src/shared/rm-rf.h \
src/shared/virt.c \
src/shared/virt.h \
src/shared/architecture.c \
src/shared/btrfs-util.c \
src/shared/btrfs-util.h \
src/shared/btrfs-ctree.h \
+ src/shared/rm-rf.c \
+ src/shared/rm-rf.h \
src/shared/machine-image.c \
src/shared/machine-image.h \
src/shared/machine-pool.c \
src/test/test-util.c
test_util_LDADD = \
+ libsystemd-label.la \
libsystemd-shared.la
test_path_lookup_SOURCES = \
test_path_lookup_LDADD = \
-lm \
libsystemd-units.la \
+ libsystemd-label.la \
libsystemd-shared.la
test_uid_range_SOURCES = \
src/test/test-path-util.c
test_path_util_LDADD = \
+ libsystemd-label.la \
libsystemd-shared.la
test_path_SOURCES = \
src/test/test-conf-files.c
test_conf_files_LDADD = \
+ libsystemd-label.la \
libsystemd-shared.la
test_bus_policy_SOURCES = \
$(BLKID_CFLAGS)
bootctl_LDADD = \
+ libsystemd-label.la \
libsystemd-shared.la \
libsystemd-internal.la \
$(BLKID_LIBS)
}
if (e->temp_path) {
- (void) btrfs_subvol_remove(e->temp_path);
+ (void) btrfs_subvol_remove(e->temp_path, false);
free(e->temp_path);
}
return r;
}
- if (i->force_local) {
- (void) btrfs_subvol_remove(i->final_path);
- (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL);
- }
+ if (i->force_local)
+ (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path);
if (r < 0)
}
if (i->temp_path) {
- (void) btrfs_subvol_remove(i->temp_path);
- (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
free(i->temp_path);
}
return r;
}
- if (i->force_local) {
- (void) btrfs_subvol_remove(i->final_path);
- (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL);
- }
+ if (i->force_local)
+ (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path);
if (r < 0)
p = strjoina(image_root, "/", local);
- if (force_local) {
- (void) btrfs_subvol_remove(p);
- (void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL);
- }
+ if (force_local)
+ (void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
r = btrfs_subvol_snapshot(final, p, false, false);
if (r == -ENOTTY) {
sd_event_unref(i->event);
if (i->temp_path) {
- (void) btrfs_subvol_remove(i->temp_path);
- (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
free(i->temp_path);
}
p = strjoina(i->image_root, "/", i->local, ".raw");
- if (i->force_local) {
- (void) btrfs_subvol_remove(p);
- (void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL);
- }
+ if (i->force_local)
+ (void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
r = tempfn_random(p, &tp);
if (r < 0)
sd_event_unref(i->event);
if (i->temp_path) {
- (void) btrfs_subvol_remove(i->temp_path);
- (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
free(i->temp_path);
}
if (remove_subvol && arg_directory) {
int k;
- k = btrfs_subvol_remove(arg_directory);
+ k = btrfs_subvol_remove(arg_directory, true);
if (k < 0)
log_warning_errno(k, "Cannot remove subvolume '%s', ignoring: %m", arg_directory);
}
le64_t rsv_rfer;
le64_t rsv_excl;
} _packed_;
+
+struct btrfs_root_ref {
+ le64_t dirid;
+ le64_t sequence;
+ le16_t name_len;
+} _packed_;
r = copy_directory_fd(old_fd, new_path, true);
if (r < 0) {
- btrfs_subvol_remove(new_path);
+ btrfs_subvol_remove(new_path, false);
return r;
}
if (read_only) {
r = btrfs_subvol_set_read_only(new_path, true);
if (r < 0) {
- btrfs_subvol_remove(new_path);
+ btrfs_subvol_remove(new_path, false);
return r;
}
}
return mac_smack_fix(path, false, false);
}
-int btrfs_subvol_remove(const char *path) {
- struct btrfs_ioctl_vol_args args = {};
- _cleanup_close_ int fd = -1;
- const char *subvolume;
- int r;
-
- assert(path);
-
- r = extract_subvolume_name(path, &subvolume);
- if (r < 0)
- return r;
-
- fd = open_parent(path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
- if (fd < 0)
- return fd;
-
- strncpy(args.name, subvolume, sizeof(args.name)-1);
-
- if (ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args) < 0)
- return -errno;
-
- return 0;
-}
-
int btrfs_subvol_set_read_only_fd(int fd, bool b) {
uint64_t flags, nflags;
struct stat st;
return btrfs_resize_loopback_fd(fd, new_size, grow_only);
}
+
+static int subvol_remove_children(int fd, const char *subvolume, uint64_t subvol_id, bool recursive) {
+ struct btrfs_ioctl_search_args args = {
+ .key.tree_id = BTRFS_ROOT_TREE_OBJECTID,
+
+ .key.min_objectid = BTRFS_FIRST_FREE_OBJECTID,
+ .key.max_objectid = BTRFS_LAST_FREE_OBJECTID,
+
+ .key.min_type = BTRFS_ROOT_BACKREF_KEY,
+ .key.max_type = BTRFS_ROOT_BACKREF_KEY,
+
+ .key.min_transid = 0,
+ .key.max_transid = (uint64_t) -1,
+ };
+
+ struct btrfs_ioctl_vol_args vol_args = {};
+ _cleanup_close_ int subvol_fd = -1;
+ int r;
+
+ assert(fd >= 0);
+ assert(subvolume);
+
+ /* First, try to remove the subvolume. If it happens to be
+ * already empty, this will just work. */
+ strncpy(vol_args.name, subvolume, sizeof(vol_args.name)-1);
+ if (ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &vol_args) >= 0)
+ return 0;
+ if (!recursive || errno != ENOTEMPTY)
+ return -errno;
+
+ /* OK, the subvolume is not empty, let's look for child
+ * subvolumes, and remove them, first */
+ subvol_fd = openat(fd, subvolume, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (subvol_fd < 0)
+ return -errno;
+
+ if (subvol_id == 0) {
+ r = btrfs_subvol_get_id_fd(subvol_fd, &subvol_id);
+ if (r < 0)
+ return r;
+ }
+
+ args.key.min_offset = args.key.max_offset = subvol_id;
+
+ while (btrfs_ioctl_search_args_compare(&args) <= 0) {
+ const struct btrfs_ioctl_search_header *sh;
+ unsigned i;
+
+ args.key.nr_items = 256;
+ if (ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args) < 0)
+ return -errno;
+
+ if (args.key.nr_items <= 0)
+ break;
+
+ FOREACH_BTRFS_IOCTL_SEARCH_HEADER(i, sh, args) {
+ _cleanup_free_ char *p = NULL;
+ const struct btrfs_root_ref *ref;
+ struct btrfs_ioctl_ino_lookup_args ino_args;
+
+ btrfs_ioctl_search_args_set(&args, sh);
+
+ if (sh->type != BTRFS_ROOT_BACKREF_KEY)
+ continue;
+ if (sh->offset != subvol_id)
+ continue;
+
+ ref = BTRFS_IOCTL_SEARCH_HEADER_BODY(sh);
+
+ p = strndup((char*) ref + sizeof(struct btrfs_root_ref), le64toh(ref->name_len));
+ if (!p)
+ return -ENOMEM;
+
+ zero(ino_args);
+ ino_args.treeid = subvol_id;
+ ino_args.objectid = ref->dirid;
+
+ if (ioctl(fd, BTRFS_IOC_INO_LOOKUP, &ino_args) < 0)
+ return -errno;
+
+ if (isempty(ino_args.name))
+ /* Subvolume is in the top-level
+ * directory of the subvolume. */
+ r = subvol_remove_children(subvol_fd, p, sh->objectid, recursive);
+ else {
+ _cleanup_close_ int child_fd = -1;
+
+ /* Subvolume is somewhere further down,
+ * hence we need to open the
+ * containing directory first */
+
+ child_fd = openat(subvol_fd, ino_args.name, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (child_fd < 0)
+ return -errno;
+
+ r = subvol_remove_children(child_fd, p, sh->objectid, recursive);
+ }
+ if (r < 0)
+ return r;
+ }
+
+ /* Increase search key by one, to read the next item, if we can. */
+ if (!btrfs_ioctl_search_args_inc(&args))
+ break;
+ }
+
+ /* OK, the child subvolumes should all be gone now, let's try
+ * again to remove the subvolume */
+ if (ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &vol_args) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int btrfs_subvol_remove(const char *path, bool recursive) {
+ _cleanup_close_ int fd = -1;
+ const char *subvolume;
+ int r;
+
+ assert(path);
+
+ r = extract_subvolume_name(path, &subvolume);
+ if (r < 0)
+ return r;
+
+ fd = open_parent(path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (fd < 0)
+ return fd;
+
+ return subvol_remove_children(fd, subvolume, 0, recursive);
+}
+
+int btrfs_subvol_remove_fd(int fd, const char *subvolume, bool recursive) {
+ return subvol_remove_children(fd, subvolume, 0, recursive);
+}
int btrfs_subvol_make(const char *path);
int btrfs_subvol_make_label(const char *path);
-int btrfs_subvol_remove(const char *path);
int btrfs_subvol_snapshot_fd(int old_fd, const char *new_path, bool read_only, bool fallback_copy);
int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy);
int btrfs_resize_loopback_fd(int fd, uint64_t size, bool grow_only);
int btrfs_resize_loopback(const char *path, uint64_t size, bool grow_only);
+
+int btrfs_subvol_remove(const char *path, bool recursive);
+int btrfs_subvol_remove_fd(int fd, const char *subvolume, bool recursive);
switch (i->type) {
case IMAGE_SUBVOLUME:
- return btrfs_subvol_remove(i->path);
+ return btrfs_subvol_remove(i->path, true);
case IMAGE_DIRECTORY:
/* Allow deletion of read-only directories */
#define BTRFS_FIRST_FREE_OBJECTID 256
#endif
+#ifndef BTRFS_LAST_FREE_OBJECTID
+#define BTRFS_LAST_FREE_OBJECTID -256ULL
+#endif
+
#ifndef BTRFS_ROOT_TREE_OBJECTID
#define BTRFS_ROOT_TREE_OBJECTID 1
#endif
#define BTRFS_QGROUP_LIMIT_KEY 244
#endif
+#ifndef BTRFS_ROOT_BACKREF_KEY
+#define BTRFS_ROOT_BACKREF_KEY 144
+#endif
+
#ifndef BTRFS_SUPER_MAGIC
#define BTRFS_SUPER_MAGIC 0x9123683E
#endif
#include "util.h"
#include "path-util.h"
+#include "btrfs-util.h"
#include "rm-rf.h"
int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
}
if ((flags & REMOVE_SUBVOLUME) && st.st_ino == 256) {
- struct btrfs_ioctl_vol_args args = {};
/* This could be a subvolume, try to remove it */
- strncpy(args.name, de->d_name, sizeof(args.name)-1);
- if (ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args) < 0) {
-
- if (errno != ENOTTY && errno != EINVAL) {
+ r = btrfs_subvol_remove_fd(fd, de->d_name, true);
+ if (r < 0) {
+ if (r != -ENOTTY && r != -EINVAL) {
if (ret == 0)
- ret = -errno;
+ ret = r;
safe_close(subdir_fd);
continue;
}
- /* ENOTTY, then it wasn't a btrfs subvolume */
+ /* ENOTTY, then it wasn't a
+ * btrfs subvolume, continue
+ * below. */
} else {
/* It was a subvolume, continue. */
safe_close(subdir_fd);
return -EPERM;
}
+ if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
+ /* Try to remove as subvolume first */
+ r = btrfs_subvol_remove(path, true);
+ if (r >= 0)
+ return r;
+
+ if (r != -ENOTTY && r != -EINVAL)
+ return r;
+
+ /* Not btrfs or not a subvolume */
+ }
+
fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
if (fd < 0) {
r = rm_rf_children(fd, flags, NULL);
if (flags & REMOVE_ROOT) {
- if (rmdir(path) < 0 && errno != ENOENT) {
- if (r == 0)
+ if (rmdir(path) < 0) {
+ if (r == 0 && errno != ENOENT)
r = -errno;
}
}
#include "btrfs-util.h"
int main(int argc, char *argv[]) {
- int r;
- int fd;
+ int r, fd;
fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
if (fd < 0)
if (r < 0)
log_error_errno(r, "Failed to make snapshot: %m");
- r = btrfs_subvol_remove("/xxxtest");
+ r = btrfs_subvol_remove("/xxxtest", false);
if (r < 0)
log_error_errno(r, "Failed to remove subvolume: %m");
- r = btrfs_subvol_remove("/xxxtest2");
+ r = btrfs_subvol_remove("/xxxtest2", false);
if (r < 0)
log_error_errno(r, "Failed to remove subvolume: %m");
- r = btrfs_subvol_remove("/xxxtest3");
+ r = btrfs_subvol_remove("/xxxtest3", false);
if (r < 0)
log_error_errno(r, "Failed to remove subvolume: %m");
if (r < 0)
log_error_errno(r, "Failed to make snapshot: %m");
- r = btrfs_subvol_remove("/etc2");
+ r = btrfs_subvol_remove("/etc2", false);
if (r < 0)
log_error_errno(r, "Failed to remove subvolume: %m");
+ r = btrfs_subvol_make("/xxxrectest");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ if (mkdir("/xxxrectest/dir", 0755) < 0)
+ log_error_errno(errno, "Failed to make directory: %m");
+
+ r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
+ log_error_errno(errno, "Failed to make directory: %m");
+
+ r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
+ if (r < 0)
+ log_error_errno(r, "Failed to make subvolume: %m");
+
+ if (mkdir("/xxxrectest/mnt", 0755) < 0)
+ log_error_errno(errno, "Failed to make directory: %m");
+
+ r = btrfs_subvol_remove("/xxxrectest", true);
+ if (r < 0)
+ log_error_errno(r, "Failed to recursively remove subvolume: %m");
+
return 0;
}
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-
#include "hostname-setup.h"
#include "util.h"
projects / platform / upstream / systemd.git / commitdiff