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authorDaniel Mack <github@zonque.org>2015-10-23 10:50:53 +0200
committerDaniel Mack <github@zonque.org>2015-10-23 10:50:53 +0200
commit952b4473bc392652b1d4c9dae5ec88fd003c4e1d (patch)
tree8d27afa9b27ceb997013868f2b80a4bb5a993911 /src/shared/machine-pool.c
parentc9fc270e462bf2f4eab963bf71234d64b0c4c30f (diff)
parentb0830e21f47109d8a6ba2fc0afbf9b2ca1ffc2a9 (diff)
Merge pull request #1641 from poettering/btrfs-quota
btrfs quota beef up and various other unrelated changes
Diffstat (limited to 'src/shared/machine-pool.c')
-rw-r--r--src/shared/machine-pool.c45
1 files changed, 36 insertions, 9 deletions
diff --git a/src/shared/machine-pool.c b/src/shared/machine-pool.c
index 8af78f47d5..1da7d0815f 100644
--- a/src/shared/machine-pool.c
+++ b/src/shared/machine-pool.c
@@ -170,7 +170,7 @@ int setup_machine_directory(uint64_t size, sd_bus_error *error) {
};
_cleanup_close_ int fd = -1, control = -1, loop = -1;
_cleanup_free_ char* loopdev = NULL;
- char tmpdir[] = "/tmp/import-mount.XXXXXX", *mntdir = NULL;
+ char tmpdir[] = "/tmp/machine-pool.XXXXXX", *mntdir = NULL;
bool tmpdir_made = false, mntdir_made = false, mntdir_mounted = false;
char buf[FORMAT_BYTES_MAX];
int r, nr = -1;
@@ -194,14 +194,35 @@ int setup_machine_directory(uint64_t size, sd_bus_error *error) {
r = btrfs_quota_enable("/var/lib/machines", true);
if (r < 0)
- log_warning_errno(r, "Failed to enable quota, ignoring: %m");
+ log_warning_errno(r, "Failed to enable quota for /var/lib/machines, ignoring: %m");
+ r = btrfs_subvol_auto_qgroup("/var/lib/machines", 0, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines, ignoring: %m");
+
+ return 1;
+ }
+
+ if (path_is_mount_point("/var/lib/machines", AT_SYMLINK_FOLLOW) > 0) {
+ log_debug("/var/lib/machines is already a mount point, not creating loopback file for it.");
return 0;
}
- if (path_is_mount_point("/var/lib/machines", AT_SYMLINK_FOLLOW) > 0 ||
- dir_is_empty("/var/lib/machines") == 0)
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "/var/lib/machines is not a btrfs file system. Operation is not supported on legacy file systems.");
+ r = dir_is_populated("/var/lib/machines");
+ if (r < 0 && r != -ENOENT)
+ return r;
+ if (r > 0) {
+ log_debug("/var/log/machines is already populated, not creating loopback file for it.");
+ return 0;
+ }
+
+ r = mkfs_exists("btrfs");
+ if (r == -ENOENT) {
+ log_debug("mkfs.btrfs is missing, cannot create loopback file for /var/lib/machines.");
+ return 0;
+ }
+ if (r < 0)
+ return r;
fd = setup_machine_raw(size, error);
if (fd < 0)
@@ -266,6 +287,10 @@ int setup_machine_directory(uint64_t size, sd_bus_error *error) {
if (r < 0)
log_warning_errno(r, "Failed to enable quota, ignoring: %m");
+ r = btrfs_subvol_auto_qgroup(mntdir, 0, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to set up default quota hierarchy, ignoring: %m");
+
if (chmod(mntdir, 0700) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to fix owner: %m");
goto fail;
@@ -286,7 +311,7 @@ int setup_machine_directory(uint64_t size, sd_bus_error *error) {
(void) rmdir(mntdir);
(void) rmdir(tmpdir);
- return 0;
+ return 1;
fail:
if (mntdir_mounted)
@@ -370,9 +395,11 @@ int grow_machine_directory(void) {
if (r <= 0)
return r;
- r = btrfs_quota_limit("/var/lib/machines", new_size);
- if (r < 0)
- return r;
+ /* Also bump the quota, of both the subvolume leaf qgroup, as
+ * well as of any subtree quota group by the same id but a
+ * higher level, if it exists. */
+ (void) btrfs_qgroup_set_limit("/var/lib/machines", 0, new_size);
+ (void) btrfs_subvol_set_subtree_quota_limit("/var/lib/machines", 0, new_size);
log_info("Grew /var/lib/machines btrfs loopback file system to %s.", format_bytes(buf, sizeof(buf), new_size));
return 1;