From 6be27132406b3f42ed23c97c6bfb63b7b5f2b4a3 Mon Sep 17 00:00:00 2001 From: kib Date: Sat, 4 Oct 2014 18:28:27 +0000 Subject: Add IO_RANGELOCKED flag for vn_rdwr(9), which specifies that vnode is not locked, but range is. Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 2 weeks --- sys/kern/vfs_vnops.c | 17 ++++++++++------- sys/sys/vnode.h | 1 + 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index 617bda0..65b5371 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -504,13 +504,16 @@ vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, int len, off_t offset, error = 0; if ((ioflg & IO_NODELOCKED) == 0) { - if (rw == UIO_READ) { - rl_cookie = vn_rangelock_rlock(vp, offset, - offset + len); - } else { - rl_cookie = vn_rangelock_wlock(vp, offset, - offset + len); - } + if ((ioflg & IO_RANGELOCKED) == 0) { + if (rw == UIO_READ) { + rl_cookie = vn_rangelock_rlock(vp, offset, + offset + len); + } else { + rl_cookie = vn_rangelock_wlock(vp, offset, + offset + len); + } + } else + rl_cookie = NULL; mp = NULL; if (rw == UIO_WRITE) { if (vp->v_type != VCHR && diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h index 6b07295..8610aca 100644 --- a/sys/sys/vnode.h +++ b/sys/sys/vnode.h @@ -305,6 +305,7 @@ struct vattr { #define IO_NORMAL 0x0800 /* operate on regular data */ #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ #define IO_BUFLOCKED 0x2000 /* ffs flag; indir buf is locked */ +#define IO_RANGELOCKED 0x4000 /* range locked */ #define IO_SEQMAX 0x7F /* seq heuristic max value */ #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ -- cgit v1.1