| @@ -1,14 +1,14 @@ | | | @@ -1,14 +1,14 @@ |
| 1 | /* $NetBSD: ffs_alloc.c,v 1.167 2020/04/18 19:18:34 christos Exp $ */ | | 1 | /* $NetBSD: ffs_alloc.c,v 1.168 2020/07/26 00:20:13 chs Exp $ */ |
| 2 | | | 2 | |
| 3 | /*- | | 3 | /*- |
| 4 | * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. | | 4 | * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. | | 5 | * All rights reserved. |
| 6 | * | | 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation | | 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Wasabi Systems, Inc. | | 8 | * by Wasabi Systems, Inc. |
| 9 | * | | 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without | | 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions | | 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: | | 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright | | 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. | | 14 | * notice, this list of conditions and the following disclaimer. |
| @@ -60,27 +60,27 @@ | | | @@ -60,27 +60,27 @@ |
| 60 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | | 60 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 61 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | | 61 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 62 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | | 62 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 63 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | | 63 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 64 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | 64 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 65 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | | 65 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 66 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | | 66 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 67 | * SUCH DAMAGE. | | 67 | * SUCH DAMAGE. |
| 68 | * | | 68 | * |
| 69 | * @(#)ffs_alloc.c 8.19 (Berkeley) 7/13/95 | | 69 | * @(#)ffs_alloc.c 8.19 (Berkeley) 7/13/95 |
| 70 | */ | | 70 | */ |
| 71 | | | 71 | |
| 72 | #include <sys/cdefs.h> | | 72 | #include <sys/cdefs.h> |
| 73 | __KERNEL_RCSID(0, "$NetBSD: ffs_alloc.c,v 1.167 2020/04/18 19:18:34 christos Exp $"); | | 73 | __KERNEL_RCSID(0, "$NetBSD: ffs_alloc.c,v 1.168 2020/07/26 00:20:13 chs Exp $"); |
| 74 | | | 74 | |
| 75 | #if defined(_KERNEL_OPT) | | 75 | #if defined(_KERNEL_OPT) |
| 76 | #include "opt_ffs.h" | | 76 | #include "opt_ffs.h" |
| 77 | #include "opt_quota.h" | | 77 | #include "opt_quota.h" |
| 78 | #include "opt_uvm_page_trkown.h" | | 78 | #include "opt_uvm_page_trkown.h" |
| 79 | #endif | | 79 | #endif |
| 80 | | | 80 | |
| 81 | #include <sys/param.h> | | 81 | #include <sys/param.h> |
| 82 | #include <sys/systm.h> | | 82 | #include <sys/systm.h> |
| 83 | #include <sys/buf.h> | | 83 | #include <sys/buf.h> |
| 84 | #include <sys/cprng.h> | | 84 | #include <sys/cprng.h> |
| 85 | #include <sys/kauth.h> | | 85 | #include <sys/kauth.h> |
| 86 | #include <sys/kernel.h> | | 86 | #include <sys/kernel.h> |
| @@ -194,27 +194,27 @@ ffs_alloc(struct inode *ip, daddr_t lbn, | | | @@ -194,27 +194,27 @@ ffs_alloc(struct inode *ip, daddr_t lbn, |
| 194 | * Sanity-check that allocations within the file size | | 194 | * Sanity-check that allocations within the file size |
| 195 | * do not allow other threads to read the stale contents | | 195 | * do not allow other threads to read the stale contents |
| 196 | * of newly allocated blocks. | | 196 | * of newly allocated blocks. |
| 197 | * Usually pages will exist to cover the new allocation. | | 197 | * Usually pages will exist to cover the new allocation. |
| 198 | * There is an optimization in ffs_write() where we skip | | 198 | * There is an optimization in ffs_write() where we skip |
| 199 | * creating pages if several conditions are met: | | 199 | * creating pages if several conditions are met: |
| 200 | * - the file must not be mapped (in any user address space). | | 200 | * - the file must not be mapped (in any user address space). |
| 201 | * - the write must cover whole pages and whole blocks. | | 201 | * - the write must cover whole pages and whole blocks. |
| 202 | * If those conditions are not met then pages must exist and | | 202 | * If those conditions are not met then pages must exist and |
| 203 | * be locked by the current thread. | | 203 | * be locked by the current thread. |
| 204 | */ | | 204 | */ |
| 205 | | | 205 | |
| 206 | struct vnode *vp = ITOV(ip); | | 206 | struct vnode *vp = ITOV(ip); |
| 207 | if (vp->v_type == VREG && | | 207 | if (vp->v_type == VREG && (flags & IO_EXT) == 0 && |
| 208 | ffs_lblktosize(fs, (voff_t)lbn) < round_page(vp->v_size) && | | 208 | ffs_lblktosize(fs, (voff_t)lbn) < round_page(vp->v_size) && |
| 209 | ((vp->v_vflag & VV_MAPPED) != 0 || (size & PAGE_MASK) != 0 || | | 209 | ((vp->v_vflag & VV_MAPPED) != 0 || (size & PAGE_MASK) != 0 || |
| 210 | ffs_blkoff(fs, size) != 0)) { | | 210 | ffs_blkoff(fs, size) != 0)) { |
| 211 | struct vm_page *pg __diagused; | | 211 | struct vm_page *pg __diagused; |
| 212 | struct uvm_object *uobj = &vp->v_uobj; | | 212 | struct uvm_object *uobj = &vp->v_uobj; |
| 213 | voff_t off = trunc_page(ffs_lblktosize(fs, lbn)); | | 213 | voff_t off = trunc_page(ffs_lblktosize(fs, lbn)); |
| 214 | voff_t endoff = round_page(ffs_lblktosize(fs, lbn) + size); | | 214 | voff_t endoff = round_page(ffs_lblktosize(fs, lbn) + size); |
| 215 | | | 215 | |
| 216 | rw_enter(uobj->vmobjlock, RW_WRITER); | | 216 | rw_enter(uobj->vmobjlock, RW_WRITER); |
| 217 | while (off < endoff) { | | 217 | while (off < endoff) { |
| 218 | pg = uvm_pagelookup(uobj, off); | | 218 | pg = uvm_pagelookup(uobj, off); |
| 219 | KASSERT((pg != NULL && pg->owner_tag != NULL && | | 219 | KASSERT((pg != NULL && pg->owner_tag != NULL && |
| 220 | pg->owner == curproc->p_pid && | | 220 | pg->owner == curproc->p_pid && |