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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-05-02 13:56:07 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-05-02 13:56:07 -0400
commit8ad54a01825f962458cfac9e5a62e7268ac2fa05 (patch)
treed291750e20dc93c40871f24815104f455dd71711 /src/machine/image-dbus.c
parent33e40442c6c5d296dfaa733b8429bff1a24869cc (diff)
parentd13febb1e0d17ce11cfa904085c91e98d336f476 (diff)
Merge pull request #3153 from poettering/async-clone
machined: make "clone" asynchronous, and support copy-based fall-back
Diffstat (limited to 'src/machine/image-dbus.c')
-rw-r--r--src/machine/image-dbus.c75
1 files changed, 67 insertions, 8 deletions
diff --git a/src/machine/image-dbus.c b/src/machine/image-dbus.c
index b764bc43a0..0eed9b81bb 100644
--- a/src/machine/image-dbus.c
+++ b/src/machine/image-dbus.c
@@ -20,9 +20,11 @@
#include "alloc-util.h"
#include "bus-label.h"
#include "bus-util.h"
+#include "fd-util.h"
#include "image-dbus.h"
#include "io-util.h"
#include "machine-image.h"
+#include "process-util.h"
#include "strv.h"
#include "user-util.h"
@@ -33,13 +35,18 @@ int bus_image_method_remove(
void *userdata,
sd_bus_error *error) {
+ _cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
Image *image = userdata;
Manager *m = image->userdata;
+ pid_t child;
int r;
assert(message);
assert(image);
+ if (m->n_operations >= OPERATIONS_MAX)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
+
r = bus_verify_polkit_async(
message,
CAP_SYS_ADMIN,
@@ -54,11 +61,35 @@ int bus_image_method_remove(
if (r == 0)
return 1; /* Will call us back */
- r = image_remove(image);
- if (r < 0)
+ if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
+ return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
+
+ child = fork();
+ if (child < 0)
+ return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
+ if (child == 0) {
+ errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
+
+ r = image_remove(image);
+ if (r < 0) {
+ (void) write(errno_pipe_fd[1], &r, sizeof(r));
+ _exit(EXIT_FAILURE);
+ }
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
+
+ r = operation_new(m, NULL, child, message, errno_pipe_fd[0]);
+ if (r < 0) {
+ (void) sigkill_wait(child);
return r;
+ }
- return sd_bus_reply_method_return(message, NULL);
+ errno_pipe_fd[0] = -1;
+
+ return 1;
}
int bus_image_method_rename(
@@ -107,13 +138,19 @@ int bus_image_method_clone(
void *userdata,
sd_bus_error *error) {
+ _cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
Image *image = userdata;
Manager *m = image->userdata;
const char *new_name;
int r, read_only;
+ pid_t child;
assert(message);
assert(image);
+ assert(m);
+
+ if (m->n_operations >= OPERATIONS_MAX)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
r = sd_bus_message_read(message, "sb", &new_name, &read_only);
if (r < 0)
@@ -136,13 +173,35 @@ int bus_image_method_clone(
if (r == 0)
return 1; /* Will call us back */
- r = image_clone(image, new_name, read_only);
- if (r == -EOPNOTSUPP)
- return sd_bus_reply_method_errnof(message, r, "Image cloning is currently only supported on btrfs file systems.");
- if (r < 0)
+ if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
+ return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
+
+ child = fork();
+ if (child < 0)
+ return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
+ if (child == 0) {
+ errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
+
+ r = image_clone(image, new_name, read_only);
+ if (r < 0) {
+ (void) write(errno_pipe_fd[1], &r, sizeof(r));
+ _exit(EXIT_FAILURE);
+ }
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
+
+ r = operation_new(m, NULL, child, message, errno_pipe_fd[0]);
+ if (r < 0) {
+ (void) sigkill_wait(child);
return r;
+ }
- return sd_bus_reply_method_return(message, NULL);
+ errno_pipe_fd[0] = -1;
+
+ return 1;
}
int bus_image_method_mark_read_only(