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machined: when the pool limit is set to infinity don't resize backing loopback file

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An unlimited quota makes a lot of sense, but we really should try to propagate this onto the loopback file size, since
an infinitely sized file makes no sense.

Fixes: #2314 #2253
This commit is contained in:
Lennart Poettering 2016-01-26 19:00:56 +01:00
parent 1cdc944823
commit 05e8f270a9
1 changed files with 8 additions and 5 deletions
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13
src/machine/machined-dbus.c
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@ -833,11 +833,14 @@ static int method_set_pool_limit(sd_bus_message *message, void *userdata, sd_bus
if (r < 0)
return r;
r = btrfs_resize_loopback("/var/lib/machines", limit, false);
if (r == -ENOTTY)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs.");
if (r < 0 && r != -ENODEV) /* ignore ENODEV, as that's what is returned if the file system is not on loopback */
return sd_bus_error_set_errnof(error, r, "Failed to adjust loopback limit: %m");
/* Resize the backing loopback device, if there is one, except if we asked to drop any limit */
if (limit != (uint64_t) -1) {
r = btrfs_resize_loopback("/var/lib/machines", limit, false);
if (r == -ENOTTY)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs.");
if (r < 0 && r != -ENODEV) /* ignore ENODEV, as that's what is returned if the file system is not on loopback */
return sd_bus_error_set_errnof(error, r, "Failed to adjust loopback limit: %m");
}
(void) btrfs_qgroup_set_limit("/var/lib/machines", 0, limit);