fuse2fs: report nanoseconds resolution through getattr

Report the nanonseconds component of timestamps via getattr, and tell
fuse that we actually support nanosecond granularity.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/174553065051.1160461.5080284869849276746.stgit@frogsfrogsfrogs
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index bacbec2eb897dad720329a41bee32725f0b163f5..a35986fb60a6012cdb28eef74633ef86f8ad8ba8 100644 (file)
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -586,6 +586,9 @@ static void *op_init(struct fuse_conn_info *conn
        dbg_printf(ff, "%s: dev=%s\n", __func__, fs->device_name);
 #ifdef FUSE_CAP_IOCTL_DIR
        conn->want |= FUSE_CAP_IOCTL_DIR;
+#endif
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+       conn->time_gran = 1;
 #endif
        if (fs->flags & EXT2_FLAG_RW) {
                fs->super->s_mnt_count++;
@@ -635,10 +638,13 @@ static int stat_inode(ext2_filsys fs, ext2_ino_t ino, struct stat *statbuf)
                                                (struct ext2_inode *)&inode);
        EXT4_INODE_GET_XTIME(i_atime, &tv, &inode);
        statbuf->st_atime = tv.tv_sec;
+       statbuf->st_atim.tv_nsec = tv.tv_nsec;
        EXT4_INODE_GET_XTIME(i_mtime, &tv, &inode);
        statbuf->st_mtime = tv.tv_sec;
+       statbuf->st_mtim.tv_nsec = tv.tv_nsec;
        EXT4_INODE_GET_XTIME(i_ctime, &tv, &inode);
        statbuf->st_ctime = tv.tv_sec;
+       statbuf->st_ctim.tv_nsec = tv.tv_nsec;
        if (LINUX_S_ISCHR(inode.i_mode) ||
            LINUX_S_ISBLK(inode.i_mode)) {
                if (inode.i_block[0])