On 09/03/2014 03:36 PM, Miao Xie wrote: > The original code need scan the devices and build the fs device list by the > user > tool by udev or users' selves. It is flexible. But if someone re-install the > filesystem module, and forget to scan the devices by himself, or we plug some > devices with btrfs, but udev thread is blocked and doesn't register the disk > into btrfs in time, the filesystem would report that "can not open some > device" > when mounting the filesystem, it was uncomfortable, this patch fixes this > problem > by scanning all the devices if we find the number of devices is not right when > we mount the filesystem. > > Signed-off-by: Miao Xie <[email protected]> [....] > + > +void btrfs_scan_all_devices(void *holder) > +{ > + struct class_dev_iter iter; > + struct device *dev; > + struct gendisk *disk; > + > + mutex_lock(&uuid_mutex); > + class_dev_iter_init(&iter, &block_class, NULL, &disk_type); > + while ((dev = class_dev_iter_next(&iter))) { > + disk = dev_to_disk(dev); > + > + if (!get_capacity(disk) || > + (!disk_max_parts(disk) && > + (disk->flags & GENHD_FL_REMOVABLE))) ^^^^^^^^^^^^^^^^^^ > + continue; > + > + if (disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO) > + continue;
Hi, could you elaborate why a removable disk should be not scan-ned ? How a removble usb disk is classified ? Thanks. G.Baroncelli [...] -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
