diff options
| -rw-r--r-- | sys/kern/vfs_syscalls.c | 10 | ||||
| -rw-r--r-- | sys/kern/vfs_vnops.c | 7 | ||||
| -rw-r--r-- | sys/kern/vnode_if.src | 2 | ||||
| -rw-r--r-- | sys/sys/mount.h | 3 |
4 files changed, 16 insertions, 6 deletions
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 72a53f8..1cc6d2d 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -3476,7 +3476,7 @@ fsync(td, uap) struct mount *mp; struct file *fp; int vfslocked; - int error; + int error, lock_flags; AUDIT_ARG(fd, uap->fd); if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0) @@ -3485,7 +3485,13 @@ fsync(td, uap) vfslocked = VFS_LOCK_GIANT(vp->v_mount); if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) goto drop; - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); + if (MNT_SHARED_WRITES(mp) || + ((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) { + lock_flags = LK_SHARED; + } else { + lock_flags = LK_EXCLUSIVE; + } + vn_lock(vp, lock_flags | LK_RETRY); AUDIT_ARG(vnode, vp, ARG_VNODE1); if (vp->v_object != NULL) { VM_OBJECT_LOCK(vp->v_object); diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index 702faae..9ffb6a6 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -376,8 +376,8 @@ vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, active_cred, file_cred, (error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) return (error); - if (mp != NULL && - (mp->mnt_kern_flag & MNTK_SHARED_WRITES)) { + if (MNT_SHARED_WRITES(mp) || + ((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) { lock_flags = LK_SHARED; } else { lock_flags = LK_EXCLUSIVE; @@ -592,7 +592,8 @@ vn_write(fp, uio, active_cred, flags, td) (error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) goto unlock; - if (mp != NULL && (mp->mnt_kern_flag & MNTK_SHARED_WRITES) && + if ((MNT_SHARED_WRITES(mp) || + ((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) && (flags & FOF_OFFSET) != 0) { lock_flags = LK_SHARED; } else { diff --git a/sys/kern/vnode_if.src b/sys/kern/vnode_if.src index 81c0dff..f54d046 100644 --- a/sys/kern/vnode_if.src +++ b/sys/kern/vnode_if.src @@ -197,7 +197,7 @@ vop_read { }; -%% write vp E E E +%% write vp L L L %! write pre VOP_WRITE_PRE %! write post VOP_WRITE_POST diff --git a/sys/sys/mount.h b/sys/sys/mount.h index a7915d6..781d2b7 100644 --- a/sys/sys/mount.h +++ b/sys/sys/mount.h @@ -336,6 +336,9 @@ void __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp); #define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */ #define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */ +#define MNT_SHARED_WRITES(mp) (((mp) != NULL) && \ + ((mp)->mnt_kern_flag & MNTK_SHARED_WRITES)) + /* * Sysctl CTL_VFS definitions. * |
