bsd/kern/kern_symfile.c

100 kern_ioctl_file_extents(struct kern_direct_file_io_ref_t * ref, u_long theIoctl, off_t offset, off_t end)
115     if (ref->vp->v_type == VREG)
117 	 p1 = &ref->device;
124 	p1 = ref->vp;
125 	p2 = ref->ctx;
130         if (ref->vp->v_type == VREG)
136             error = VNOP_BLOCKMAP(ref->vp, offset, filechunk, &blkno, &filechunk, NULL, 0, NULL);
138             fileblk = blkno * ref->blksize;
140         else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
143             filechunk = ref->filelength;
176 kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_size_t len);
192     struct kern_direct_file_io_ref_t * ref;
215     ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
216     if (!ref)
222     bzero(ref, sizeof(*ref));
224     ref->ctx = vfs_context_create(vfs_context_current());
226     if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, ref->ctx)))
231 	if ((error = kern_write_file(ref, write_file_offset, write_file_addr, write_file_len)))
241     if (vnode_getattr(ref->vp, &va, ref->ctx))
248     if (ref->vp->v_type == VREG)
255         ref->filelength = va.va_data_size;
265 	    error = VNOP_ALLOCATE(ref->vp, set_file_size, alloc_flags,
267 				  ref->ctx);
269 	    if (!error) error = vnode_setsize(ref->vp, set_file_size, IO_NOZEROFILL, ref->ctx);
271 	    ref->filelength = bytesallocated;
274     else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
279         p1 = ref->vp;
280         p2 = ref->ctx;
289     ref->device = device;
293     error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
297     if (ref->vp->v_type != VREG)
302 	ref->filelength = fileblk * ref->blksize;
307     error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
309     ref->pinned = (error == 0);
319     while (f_offset < ref->filelength)
321         if (ref->vp->v_type == VREG)
326             error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno, &filechunk, NULL, 0, NULL);
330             fileblk = blkno * ref->blksize;
332         else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
335             filechunk = f_offset ? 0 : ref->filelength;
365     if (ref->vp->v_type == VREG)
444     if (error && ref)
446 	if (ref->vp)
448 	    vnode_close(ref->vp, FWRITE, ref->ctx);
449 	    ref->vp = NULLVP;
451 	vfs_context_rele(ref->ctx);
452 	kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
453 	ref = NULL;
456     return(ref);
460 kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_size_t len)
462     return (vn_rdwr(UIO_WRITE, ref->vp,
465                         vfs_context_ucred(ref->ctx), (int *) 0,
466 			vfs_context_proc(ref->ctx)));
471 kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref,
478     if (!ref) return;
480     if (ref->vp)
486         if (ref->vp->v_type == VREG)
488             p1 = &ref->device;
495             p1 = ref->vp;
496             p2 = ref->ctx;
503             (void) kern_write_file(ref, write_offset, addr, write_length);
505         if (discard_offset && discard_end && !ref->pinned)
507             (void) kern_ioctl_file_extents(ref, DKIOCUNMAP, discard_offset, discard_end);
510         error = vnode_close(ref->vp, FWRITE, ref->ctx);
512         ref->vp = NULLVP;
515     vfs_context_rele(ref->ctx);
516     ref->ctx = NULL;
517     kfree(ref, sizeof(struct kern_direct_file_io_ref_t));