https://bugzilla.kernel.org/show_bug.cgi?id=92271 --- Comment #20 from Alexander Holler <holler@xxxxxxxxxxxxx> --- My proof of concepts now works for fat and ext4 (just by overwriting blocks w/o secure_trim, but that's not necessary for the proof): ===== laptopahbt ~ # dd if=/dev/zero of=/tmp/test.img bs=1M count=50 50+0 Datensätze ein 50+0 Datensätze aus 52428800 Bytes (52 MB) kopiert, 0,0372579 s, 1,4 GB/s laptopahbt ~ # mkfs.ext4 /tmp/test.img mke2fs 1.42.10 (18-May-2014) Blöcke des Gerätes werden verworfen: erledigt Creating filesystem with 51200 1k blocks and 12824 inodes Filesystem UUID: fece1e42-07d5-449f-be29-650a8514648b Superblock-Sicherungskopien gespeichert in den Blöcken: 8193, 24577, 40961 Platz für Gruppentabellen wird angefordert: erledigt Inode-Tabellen werden geschrieben: erledigt Erstelle Journal (4096 Blöcke): erledigt Schreibe Superblöcke und Dateisystem-Accountinginformationen: erledigt laptopahbt ~ # grep -a akrakadabra /tmp/test.img laptopahbt ~ # mount -o loop /tmp/test.img /mnt/ laptopahbt ~ # echo akrakadabra >/mnt/foo.txt laptopahbt ~ # umount /mnt/ laptopahbt ~ # grep -a akrakadabra /tmp/test.img �@@#����▒�����7((�▒���((����7((+Q��~ ((s��c7((i���H�((�1akrakadabra laptopahbt ~ # mount -o loop /tmp/test.img /mnt/ laptopahbt ~ # rm -s /mnt/foo.txt laptopahbt ~ # umount /mnt/ laptopahbt ~ # grep -a akrakadabra /tmp/test.img laptopahbt ~ # mount -o loop /tmp/test.img /mnt/ laptopahbt ~ # echo akrakadabra >/mnt/foo.txt laptopahbt ~ # umount /mnt/ laptopahbt ~ # mount -o loop /tmp/test.img /mnt/ laptopahbt ~ # rm /mnt/foo.txt laptopahbt ~ # umount /mnt/ laptopahbt ~ # grep -a akrakadabra /tmp/test.img �@@#����▒�����7((�▒���((����7((+Q��~ ((s��c7((i���H�((�1akrakadabra laptopahbt ~ # cd /usr/src/linux laptopahbt linux # PAGER= git diff --stat HEAD~5 arch/x86/syscalls/syscall_32.tbl | 1 + arch/x86/syscalls/syscall_64.tbl | 1 + fs/ext4/ext4.h | 2 ++ fs/ext4/mballoc.c | 21 ++++++++++++++++++++- fs/ext4/super.c | 10 ++++++++++ fs/fat/fat.h | 1 + fs/fat/fatent.c | 17 +++++++++++++++++ fs/fat/inode.c | 14 ++++++++++++++ fs/namei.c | 35 ++++++++++++++++++++++++++++++----- include/asm-generic/audit_dir_write.h | 1 + include/linux/fs.h | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 4 +++- tools/perf/builtin-trace.c | 2 ++ 14 files changed, 104 insertions(+), 7 deletions(-) ===== Most changes are to add the new syscall unlinkat_s(), the changes for fat and ext4 itself are pretty small. Will post patches when I've found the time to make them such, that I don't end up again in silly discussions. -- You are receiving this mail because: You are watching the assignee of the bug.-- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
