Hello, f2fs developers! I saw commit 9af846486d781a63 "f2fs: add F2FS_IOC_SEC_TRIM_FILE ioctl" in Linux kernel https://github.com/torvalds/linux/commit/9af846486d781a63de025a5f502c515268e48790#
I saw usage of it in Android only https://android.googlesource.com/platform/system/vold/+/master/secdiscard.cpp Do I understand correctly that userspace code decides himself where the region to erase starts and when to call that ioctl? I am interested in it to implement realtime secure erase - overwriting files with zeros or random data (I am not interestied in sending a discard/trim command) - when files are deleted or are removed completely. This code seems to be a good solution of this problem, but the problem is that kernel cannot trigger it by itself. I think it should be possible to call this from another part of f2fs when a file is being edited or unlinked, but I am not sure from where exactly. F2FS has background housekeeping, it would be nice if it could issue secure trim in the background. Also, I am not sure that it will work with symlinks correctly, for example. Please give a direction. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
