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Differential D31405 Diff 93229 sys/kern/vfs_syscalls.c

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sys/kern/vfs_syscalls.c

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#endif #endif
int int
kern_fsync(struct thread *td, int fd, bool fullsync) kern_fsync(struct thread *td, int fd, bool fullsync)
{ {
struct vnode *vp; struct vnode *vp;
struct mount *mp; struct mount *mp;
struct file *fp; struct file *fp;
int error, lock_flags; int error;
AUDIT_ARG_FD(fd); AUDIT_ARG_FD(fd);
error = getvnode(td, fd, &cap_fsync_rights, &fp); error = getvnode(td, fd, &cap_fsync_rights, &fp);
if (error != 0) if (error != 0)
return (error); return (error);
vp = fp->f_vnode; vp = fp->f_vnode;
#if 0 #if 0
if (!fullsync) if (!fullsync)
/* XXXKIB: compete outstanding aio writes */; /* XXXKIB: compete outstanding aio writes */;
#endif #endif
retry: retry:
error = vn_start_write(vp, &mp, V_WAIT | PCATCH); error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
if (error != 0) if (error != 0)
goto drop; goto drop;
if (MNT_SHARED_WRITES(mp) || vn_lock(vp, vn_lktype_write(mp, vp) | LK_RETRY);
((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_VNODE1(vp); AUDIT_ARG_VNODE1(vp);
if (vp->v_object != NULL) { if (vp->v_object != NULL) {
VM_OBJECT_WLOCK(vp->v_object); VM_OBJECT_WLOCK(vp->v_object);
vm_object_page_clean(vp->v_object, 0, 0, 0); vm_object_page_clean(vp->v_object, 0, 0, 0);
VM_OBJECT_WUNLOCK(vp->v_object); VM_OBJECT_WUNLOCK(vp->v_object);
} }
error = fullsync ? VOP_FSYNC(vp, MNT_WAIT, td) : VOP_FDATASYNC(vp, td); error = fullsync ? VOP_FSYNC(vp, MNT_WAIT, td) : VOP_FDATASYNC(vp, td);
VOP_UNLOCK(vp); VOP_UNLOCK(vp);
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