Hi All, Please find attached V3 of the patches to enable SB_NOSEC for fuse. I posted V1 and V2 here. v2: https://lore.kernel.org/linux-fsdevel/20200916161737.38028-1-vgoyal@xxxxxxxxxx/ v1: https://lore.kernel.org/linux-fsdevel/20200724183812.19573-1-vgoyal@xxxxxxxxxx/ Changes since v2: - Based on Miklos's feedback, dropped a patch where we send ATTR_MODE as that's racy. To help the case of writeback_cache with killpriv_v2, I fallback to a synchronous WRITE if suid/sgid is set on file. I have generated these patches on top of. https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git/log/?h=for-nex +t I have taken care of feedback from last round. For the case of random write peformance has jumped from 50MB/s to 250MB/s. So I am really looking forward to these changes so that fuse/virtiofs performance can be improved for direct random writes. Thanks Vivek Vivek Goyal (6): fuse: Introduce the notion of FUSE_HANDLE_KILLPRIV_V2 fuse: Set FUSE_WRITE_KILL_PRIV in cached write path fuse: setattr should set FATTR_KILL_PRIV upon size change fuse: Don't send ATTR_MODE to kill suid/sgid for handle_killpriv_v2 fuse: Add a flag FUSE_OPEN_KILL_PRIV for open() request fuse: Support SB_NOSEC flag to improve direct write performance fs/fuse/dir.c | 4 +++- fs/fuse/file.c | 16 +++++++++++++++- fs/fuse/fuse_i.h | 6 ++++++ fs/fuse/inode.c | 17 ++++++++++++++++- include/uapi/linux/fuse.h | 18 +++++++++++++++++- 5 files changed, 57 insertions(+), 4 deletions(-) -- 2.25.4
