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authorLennart Poettering <lennart@poettering.net>2015-03-09 17:55:07 +0100
committerLennart Poettering <lennart@poettering.net>2015-03-09 18:02:23 +0100
commit587fec427c80b6c34dcf1d7570f891fcb652a7c5 (patch)
tree0b8f6e748ac8ecc34cbe6d03327532fb52a0e85b /src/shared
parentea79e73b8a8fa72fb959a0604f642f97e200a803 (diff)
importd: add API for exporting container/VM images
Also, expose it in machinectl.
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/btrfs-util.c53
-rw-r--r--src/shared/btrfs-util.h2
2 files changed, 32 insertions, 23 deletions
diff --git a/src/shared/btrfs-util.c b/src/shared/btrfs-util.c
index 256c5a6995..23a22db662 100644
--- a/src/shared/btrfs-util.c
+++ b/src/shared/btrfs-util.c
@@ -101,48 +101,42 @@ int btrfs_is_snapshot(int fd) {
return F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC);
}
-int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy) {
+int btrfs_subvol_snapshot_fd(int old_fd, const char *new_path, bool read_only, bool fallback_copy) {
struct btrfs_ioctl_vol_args_v2 args = {
.flags = read_only ? BTRFS_SUBVOL_RDONLY : 0,
};
- _cleanup_close_ int old_fd = -1, new_fd = -1;
+ _cleanup_close_ int new_fd = -1;
const char *subvolume;
int r;
- assert(old_path);
-
- old_fd = open(old_path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
- if (old_fd < 0)
- return -errno;
+ assert(new_path);
r = btrfs_is_snapshot(old_fd);
if (r < 0)
return r;
if (r == 0) {
+ if (!fallback_copy)
+ return -EISDIR;
- if (fallback_copy) {
- r = btrfs_subvol_make(new_path);
- if (r < 0)
- return r;
+ r = btrfs_subvol_make(new_path);
+ if (r < 0)
+ return r;
+
+ r = copy_directory_fd(old_fd, new_path, true);
+ if (r < 0) {
+ btrfs_subvol_remove(new_path);
+ return r;
+ }
- r = copy_directory_fd(old_fd, new_path, true);
+ if (read_only) {
+ r = btrfs_subvol_set_read_only(new_path, true);
if (r < 0) {
btrfs_subvol_remove(new_path);
return r;
}
-
- if (read_only) {
- r = btrfs_subvol_set_read_only(new_path, true);
- if (r < 0) {
- btrfs_subvol_remove(new_path);
- return r;
- }
- }
-
- return 0;
}
- return -EISDIR;
+ return 0;
}
r = extract_subvolume_name(new_path, &subvolume);
@@ -162,6 +156,19 @@ int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_
return 0;
}
+int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy) {
+ _cleanup_close_ int old_fd = -1;
+
+ assert(old_path);
+ assert(new_path);
+
+ old_fd = open(old_path, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+ if (old_fd < 0)
+ return -errno;
+
+ return btrfs_subvol_snapshot_fd(old_fd, new_path, read_only, fallback_copy);
+}
+
int btrfs_subvol_make(const char *path) {
struct btrfs_ioctl_vol_args args = {};
_cleanup_close_ int fd = -1;
diff --git a/src/shared/btrfs-util.h b/src/shared/btrfs-util.h
index a2c246b8d6..cb85b71d74 100644
--- a/src/shared/btrfs-util.h
+++ b/src/shared/btrfs-util.h
@@ -48,6 +48,8 @@ int btrfs_is_snapshot(int fd);
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_subvol_set_read_only_fd(int fd, bool b);