diff options
Diffstat (limited to 'sys/kern/vfs_vnops.c')
| -rw-r--r-- | sys/kern/vfs_vnops.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index e1459d1..c64a77e 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -429,21 +429,31 @@ vn_stat(vp, sb, p) sb->st_atimespec = vap->va_atime; sb->st_mtimespec = vap->va_mtime; sb->st_ctimespec = vap->va_ctime; + /* - * For block and char device nodes we don't really care - * about what the filesystem told us, we want to know - * what the device told us + * According to www.opengroup.org, the meaning of st_blksize is + * "a filesystem-specific preferred I/O block size for this + * object. In some filesystem types, this may vary from file + * to file" + * Default to zero to catch bogus uses of this field. */ - switch (vap->va_type) { - case VBLK: - case VCHR: - sb->st_blksize = vp->v_rdev->si_bsize_max; - break; - default: + sb->st_blksize = 0; + + if (vp->v_type == VREG) sb->st_blksize = vap->va_blocksize; - break; - } + + /* + * For disks we can say something sensible. We report the max + * size because we prefer few big transfers than many small. + * XXX: Only reliable if the disk is opened. + * XXX: Use vn_isdisk when it allows VCHR too + */ + if ((vp->v_type == VBLK || vp->v_type == VCHR) && + devsw(vp->v_rdev) && (devsw(vp->v_rdev)->d_flags & D_DISK)) + sb->st_blksize = vp->v_rdev->si_bsize_max; + sb->st_flags = vap->va_flags; + if (suser_xxx(p->p_ucred, 0, 0)) sb->st_gen = 0; else |
