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authorDenys Vlasenko <vda.linux@googlemail.com>2017-03-16 16:49:37 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2017-03-16 16:55:47 +0100
commitab518eea9c41235a3fcde80f3ea99669eaade621 (patch)
tree4bd1783e343316fa11c2ade135dbe0b0561689a9 /AUTHORS
parent018804204f41e6e60cec536843275f8fdd4d3620 (diff)
downloadbusybox-ab518eea9c41235a3fcde80f3ea99669eaade621.tar.gz
mount: create loop devices with LO_FLAGS_AUTOCLEAR flag
The "autolooped" mount (mount [-oloop] IMAGE /DIR/DIR) always creates AUTOCLEARed loopdevs, so that umounting drops them (and this does not require any code in the umount userspace). This happens since circa linux-2.6.25: commit 96c5865559cee0f9cbc5173f3c949f6ce3525581 Date: Wed Feb 6 01:36:27 2008 -0800 Subject: Allow auto-destruction of loop devices IOW: in this case, umount does not have to use -d to drop the loopdev. The explicit loop mount (mount /dev/loopN /DIR/DIR) does not do this. In this case, umount without -d should not drop loopdev. Unfortunately, bbox umount currently always implies -d, this probably needs fixing. function old new delta set_loop 537 597 +60 singlemount 1101 1138 +37 losetup_main 419 432 +13 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 110/0) Total: 110 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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