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Merge pull request #17118 from poettering/sync-shutdown-loop
fsync() block devices before detaching them during shutdown
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commit
c7828862b3
@ -23,6 +23,7 @@
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#include "device-util.h"
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#include "escape.h"
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#include "fd-util.h"
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#include "fs-util.h"
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#include "fstab-util.h"
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#include "libmount-util.h"
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#include "mount-setup.h"
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@ -387,8 +388,15 @@ static int delete_loopback(const char *device) {
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assert(device);
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fd = open(device, O_RDONLY|O_CLOEXEC);
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if (fd < 0)
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if (fd < 0) {
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log_debug_errno(errno, "Failed to open loopback device %s: %m", device);
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return errno == ENOENT ? 0 : -errno;
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}
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/* Loopback block devices don't sync in-flight blocks when we clear the fd, hence sync explicitly
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* first */
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if (fsync(fd) < 0)
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log_debug_errno(errno, "Failed to sync loop block device %s, ignoring: %m", device);
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if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
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if (errno == ENXIO) /* Nothing bound, didn't do anything */
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@ -440,43 +448,50 @@ static int delete_loopback(const char *device) {
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return -EBUSY; /* Nothing changed, the device is still attached, hence it apparently is still busy */
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}
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static int delete_dm(dev_t devnum) {
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struct dm_ioctl dm = {
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.version = {
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DM_VERSION_MAJOR,
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DM_VERSION_MINOR,
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DM_VERSION_PATCHLEVEL
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},
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.data_size = sizeof(dm),
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.dev = devnum,
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};
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static int delete_dm(MountPoint *m) {
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_cleanup_close_ int fd = -1;
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int r;
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assert(major(devnum) != 0);
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assert(m);
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assert(major(m->devnum) != 0);
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assert(m->path);
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fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC);
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if (fd < 0)
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return -errno;
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if (ioctl(fd, DM_DEV_REMOVE, &dm) < 0)
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r = fsync_path_at(AT_FDCWD, m->path);
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if (r < 0)
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log_debug_errno(r, "Failed to sync DM block device %s, ignoring: %m", m->path);
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if (ioctl(fd, DM_DEV_REMOVE, &(struct dm_ioctl) {
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.version = {
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DM_VERSION_MAJOR,
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DM_VERSION_MINOR,
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DM_VERSION_PATCHLEVEL
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},
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.data_size = sizeof(struct dm_ioctl),
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.dev = m->devnum,
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}) < 0)
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return -errno;
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return 0;
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}
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static int delete_md(MountPoint *m) {
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_cleanup_close_ int fd = -1;
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assert(m);
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assert(major(m->devnum) != 0);
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assert(m->path != 0);
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assert(m->path);
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fd = open(m->path, O_RDONLY|O_CLOEXEC|O_EXCL);
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if (fd < 0)
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return -errno;
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if (fsync(fd) < 0)
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log_debug_errno(errno, "Failed to sync MD block device %s, ignoring: %m", m->path);
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if (ioctl(fd, STOP_ARRAY, NULL) < 0)
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return -errno;
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@ -692,7 +707,7 @@ static int dm_points_list_detach(MountPoint **head, bool *changed, int umount_lo
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}
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log_info("Detaching DM %s (%u:%u).", m->path, major(m->devnum), minor(m->devnum));
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r = delete_dm(m->devnum);
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r = delete_dm(m);
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if (r < 0) {
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log_full_errno(umount_log_level, r, "Could not detach DM %s: %m", m->path);
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n_failed++;
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