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authorLennart Poettering <lennart@poettering.net>2015-01-08 19:15:49 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-08 23:13:45 +0100
commitf2068bcce01db31cdc9422f44185f3b49c04d2ce (patch)
treefd5f6ddf9b0c36e9deb24252267d5ecce0cb2fe3 /src/shared
parente45fc5e738b0b7700e8b4f3c4b25c58a49b44b27 (diff)
machined: when cloning a raw disk image, also set the NOCOW flag
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/copy.c9
-rw-r--r--src/shared/copy.h4
-rw-r--r--src/shared/machine-image.c9
3 files changed, 16 insertions, 6 deletions
diff --git a/src/shared/copy.c b/src/shared/copy.c
index 3df636704c..b681f6f109 100644
--- a/src/shared/copy.c
+++ b/src/shared/copy.c
@@ -359,7 +359,7 @@ int copy_file_fd(const char *from, int fdt, bool try_reflink) {
return r;
}
-int copy_file(const char *from, const char *to, int flags, mode_t mode) {
+int copy_file(const char *from, const char *to, int flags, mode_t mode, int chattr_flags) {
int fdt, r;
assert(from);
@@ -371,6 +371,9 @@ int copy_file(const char *from, const char *to, int flags, mode_t mode) {
return -errno;
}
+ if (chattr_flags != 0)
+ (void) chattr_fd(fdt, true, chattr_flags);
+
r = copy_file_fd(from, fdt, true);
if (r < 0) {
close(fdt);
@@ -386,7 +389,7 @@ int copy_file(const char *from, const char *to, int flags, mode_t mode) {
return 0;
}
-int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace) {
+int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, int chattr_flags) {
_cleanup_free_ char *t;
int r;
@@ -397,7 +400,7 @@ int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace
if (r < 0)
return r;
- r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode);
+ r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode, chattr_flags);
if (r < 0)
return r;
diff --git a/src/shared/copy.h b/src/shared/copy.h
index 58159a02cc..e4e3079120 100644
--- a/src/shared/copy.h
+++ b/src/shared/copy.h
@@ -25,8 +25,8 @@
#include <sys/types.h>
int copy_file_fd(const char *from, int to, bool try_reflink);
-int copy_file(const char *from, const char *to, int flags, mode_t mode);
-int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace);
+int copy_file(const char *from, const char *to, int flags, mode_t mode, int chattr_flags);
+int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, int chattr_flags);
int copy_tree(const char *from, const char *to, bool merge);
int copy_tree_at(int fdf, const char *from, int fdt, const char *to, bool merge);
int copy_directory_fd(int dirfd, const char *to, bool merge);
diff --git a/src/shared/machine-image.c b/src/shared/machine-image.c
index 36b64e1fab..25689ca93c 100644
--- a/src/shared/machine-image.c
+++ b/src/shared/machine-image.c
@@ -20,6 +20,7 @@
***/
#include <sys/statfs.h>
+#include <linux/fs.h>
#include <fcntl.h>
#include "strv.h"
@@ -440,7 +441,7 @@ int image_clone(Image *i, const char *new_name, bool read_only) {
case IMAGE_GPT:
new_path = strappenda("/var/lib/container/", new_name, ".gpt");
- r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, false);
+ r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, false, FS_NOCOW_FL);
break;
default:
@@ -477,6 +478,12 @@ int image_read_only(Image *i, bool b) {
if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0)
return -errno;
+
+ /* If the images is now read-only, it's a good time to
+ * defrag it, given that no write patterns will
+ * fragment it again. */
+ if (b)
+ (void) btrfs_defrag(i->path);
break;
}