Annotation of src/sys/ufs/ffs/ffs_vnops.c, Revision 1.16.2.3
1.16.2.3! chs 1: /* $NetBSD: ffs_vnops.c,v 1.16.2.2 1998/11/16 08:25:38 chs Exp $ */
1.3 cgd 2:
1.1 mycroft 3: /*
4: * Copyright (c) 1982, 1986, 1989, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
1.12 fvdl 35: * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
1.1 mycroft 36: */
1.11 mrg 37:
1.13 scottr 38: #if defined(_KERNEL) && !defined(_LKM)
1.11 mrg 39: #include "opt_uvm.h"
1.16.2.3! chs 40: #include "opt_uvmhist.h"
1.13 scottr 41: #endif
1.1 mycroft 42:
43: #include <sys/param.h>
44: #include <sys/systm.h>
45: #include <sys/resourcevar.h>
46: #include <sys/kernel.h>
47: #include <sys/file.h>
48: #include <sys/stat.h>
49: #include <sys/buf.h>
50: #include <sys/proc.h>
51: #include <sys/conf.h>
52: #include <sys/mount.h>
53: #include <sys/vnode.h>
54: #include <sys/malloc.h>
1.16 thorpej 55: #include <sys/pool.h>
1.6 christos 56: #include <sys/signalvar.h>
1.1 mycroft 57:
58: #include <vm/vm.h>
1.10 mrg 59:
60: #if defined(UVM)
61: #include <uvm/uvm_extern.h>
62: #endif
1.1 mycroft 63:
1.8 mycroft 64: #include <miscfs/fifofs/fifo.h>
65: #include <miscfs/genfs/genfs.h>
1.1 mycroft 66: #include <miscfs/specfs/specdev.h>
67:
68: #include <ufs/ufs/quota.h>
69: #include <ufs/ufs/inode.h>
70: #include <ufs/ufs/dir.h>
71: #include <ufs/ufs/ufs_extern.h>
1.2 mycroft 72: #include <ufs/ufs/ufsmount.h>
1.1 mycroft 73:
74: #include <ufs/ffs/fs.h>
75: #include <ufs/ffs/ffs_extern.h>
76:
77: /* Global vfs data structures for ufs. */
1.6 christos 78: int (**ffs_vnodeop_p) __P((void *));
1.1 mycroft 79: struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
80: { &vop_default_desc, vn_default_error },
81: { &vop_lookup_desc, ufs_lookup }, /* lookup */
82: { &vop_create_desc, ufs_create }, /* create */
1.5 mycroft 83: { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */
1.1 mycroft 84: { &vop_mknod_desc, ufs_mknod }, /* mknod */
85: { &vop_open_desc, ufs_open }, /* open */
86: { &vop_close_desc, ufs_close }, /* close */
87: { &vop_access_desc, ufs_access }, /* access */
88: { &vop_getattr_desc, ufs_getattr }, /* getattr */
89: { &vop_setattr_desc, ufs_setattr }, /* setattr */
90: { &vop_read_desc, ffs_read }, /* read */
91: { &vop_write_desc, ffs_write }, /* write */
1.4 mycroft 92: { &vop_lease_desc, ufs_lease_check }, /* lease */
1.1 mycroft 93: { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
1.9 mycroft 94: { &vop_poll_desc, ufs_poll }, /* poll */
1.12 fvdl 95: { &vop_revoke_desc, ufs_revoke }, /* revoke */
1.1 mycroft 96: { &vop_mmap_desc, ufs_mmap }, /* mmap */
97: { &vop_fsync_desc, ffs_fsync }, /* fsync */
98: { &vop_seek_desc, ufs_seek }, /* seek */
99: { &vop_remove_desc, ufs_remove }, /* remove */
100: { &vop_link_desc, ufs_link }, /* link */
101: { &vop_rename_desc, ufs_rename }, /* rename */
102: { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */
103: { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */
104: { &vop_symlink_desc, ufs_symlink }, /* symlink */
105: { &vop_readdir_desc, ufs_readdir }, /* readdir */
106: { &vop_readlink_desc, ufs_readlink }, /* readlink */
107: { &vop_abortop_desc, ufs_abortop }, /* abortop */
108: { &vop_inactive_desc, ufs_inactive }, /* inactive */
109: { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
110: { &vop_lock_desc, ufs_lock }, /* lock */
111: { &vop_unlock_desc, ufs_unlock }, /* unlock */
112: { &vop_bmap_desc, ufs_bmap }, /* bmap */
113: { &vop_strategy_desc, ufs_strategy }, /* strategy */
114: { &vop_print_desc, ufs_print }, /* print */
115: { &vop_islocked_desc, ufs_islocked }, /* islocked */
116: { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
117: { &vop_advlock_desc, ufs_advlock }, /* advlock */
118: { &vop_blkatoff_desc, ffs_blkatoff }, /* blkatoff */
119: { &vop_valloc_desc, ffs_valloc }, /* valloc */
120: { &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */
121: { &vop_vfree_desc, ffs_vfree }, /* vfree */
122: { &vop_truncate_desc, ffs_truncate }, /* truncate */
123: { &vop_update_desc, ffs_update }, /* update */
1.8 mycroft 124: { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
1.16.2.1 chs 125: #ifdef UBC
126: { &vop_getpages_desc, ffs_getpages }, /* getpages */
127: { &vop_putpages_desc, ffs_putpages }, /* putpages */
128: #endif
129: { NULL, NULL }
1.1 mycroft 130: };
131: struct vnodeopv_desc ffs_vnodeop_opv_desc =
132: { &ffs_vnodeop_p, ffs_vnodeop_entries };
133:
1.6 christos 134: int (**ffs_specop_p) __P((void *));
1.1 mycroft 135: struct vnodeopv_entry_desc ffs_specop_entries[] = {
136: { &vop_default_desc, vn_default_error },
137: { &vop_lookup_desc, spec_lookup }, /* lookup */
138: { &vop_create_desc, spec_create }, /* create */
139: { &vop_mknod_desc, spec_mknod }, /* mknod */
140: { &vop_open_desc, spec_open }, /* open */
141: { &vop_close_desc, ufsspec_close }, /* close */
142: { &vop_access_desc, ufs_access }, /* access */
143: { &vop_getattr_desc, ufs_getattr }, /* getattr */
144: { &vop_setattr_desc, ufs_setattr }, /* setattr */
145: { &vop_read_desc, ufsspec_read }, /* read */
146: { &vop_write_desc, ufsspec_write }, /* write */
1.4 mycroft 147: { &vop_lease_desc, spec_lease_check }, /* lease */
1.1 mycroft 148: { &vop_ioctl_desc, spec_ioctl }, /* ioctl */
1.9 mycroft 149: { &vop_poll_desc, spec_poll }, /* poll */
1.12 fvdl 150: { &vop_revoke_desc, spec_revoke }, /* revoke */
1.1 mycroft 151: { &vop_mmap_desc, spec_mmap }, /* mmap */
152: { &vop_fsync_desc, ffs_fsync }, /* fsync */
153: { &vop_seek_desc, spec_seek }, /* seek */
154: { &vop_remove_desc, spec_remove }, /* remove */
155: { &vop_link_desc, spec_link }, /* link */
156: { &vop_rename_desc, spec_rename }, /* rename */
157: { &vop_mkdir_desc, spec_mkdir }, /* mkdir */
158: { &vop_rmdir_desc, spec_rmdir }, /* rmdir */
159: { &vop_symlink_desc, spec_symlink }, /* symlink */
160: { &vop_readdir_desc, spec_readdir }, /* readdir */
161: { &vop_readlink_desc, spec_readlink }, /* readlink */
162: { &vop_abortop_desc, spec_abortop }, /* abortop */
163: { &vop_inactive_desc, ufs_inactive }, /* inactive */
164: { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
165: { &vop_lock_desc, ufs_lock }, /* lock */
166: { &vop_unlock_desc, ufs_unlock }, /* unlock */
167: { &vop_bmap_desc, spec_bmap }, /* bmap */
168: { &vop_strategy_desc, spec_strategy }, /* strategy */
169: { &vop_print_desc, ufs_print }, /* print */
170: { &vop_islocked_desc, ufs_islocked }, /* islocked */
171: { &vop_pathconf_desc, spec_pathconf }, /* pathconf */
172: { &vop_advlock_desc, spec_advlock }, /* advlock */
173: { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
174: { &vop_valloc_desc, spec_valloc }, /* valloc */
175: { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */
176: { &vop_vfree_desc, ffs_vfree }, /* vfree */
177: { &vop_truncate_desc, spec_truncate }, /* truncate */
178: { &vop_update_desc, ffs_update }, /* update */
1.8 mycroft 179: { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
1.6 christos 180: { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
1.1 mycroft 181: };
182: struct vnodeopv_desc ffs_specop_opv_desc =
183: { &ffs_specop_p, ffs_specop_entries };
184:
1.6 christos 185: int (**ffs_fifoop_p) __P((void *));
1.1 mycroft 186: struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
187: { &vop_default_desc, vn_default_error },
188: { &vop_lookup_desc, fifo_lookup }, /* lookup */
189: { &vop_create_desc, fifo_create }, /* create */
190: { &vop_mknod_desc, fifo_mknod }, /* mknod */
191: { &vop_open_desc, fifo_open }, /* open */
192: { &vop_close_desc, ufsfifo_close }, /* close */
193: { &vop_access_desc, ufs_access }, /* access */
194: { &vop_getattr_desc, ufs_getattr }, /* getattr */
195: { &vop_setattr_desc, ufs_setattr }, /* setattr */
196: { &vop_read_desc, ufsfifo_read }, /* read */
197: { &vop_write_desc, ufsfifo_write }, /* write */
1.4 mycroft 198: { &vop_lease_desc, fifo_lease_check }, /* lease */
1.1 mycroft 199: { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
1.9 mycroft 200: { &vop_poll_desc, fifo_poll }, /* poll */
1.12 fvdl 201: { &vop_revoke_desc, fifo_revoke }, /* revoke */
1.1 mycroft 202: { &vop_mmap_desc, fifo_mmap }, /* mmap */
203: { &vop_fsync_desc, ffs_fsync }, /* fsync */
204: { &vop_seek_desc, fifo_seek }, /* seek */
205: { &vop_remove_desc, fifo_remove }, /* remove */
206: { &vop_link_desc, fifo_link }, /* link */
207: { &vop_rename_desc, fifo_rename }, /* rename */
208: { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
209: { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
210: { &vop_symlink_desc, fifo_symlink }, /* symlink */
211: { &vop_readdir_desc, fifo_readdir }, /* readdir */
212: { &vop_readlink_desc, fifo_readlink }, /* readlink */
213: { &vop_abortop_desc, fifo_abortop }, /* abortop */
214: { &vop_inactive_desc, ufs_inactive }, /* inactive */
215: { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
216: { &vop_lock_desc, ufs_lock }, /* lock */
217: { &vop_unlock_desc, ufs_unlock }, /* unlock */
218: { &vop_bmap_desc, fifo_bmap }, /* bmap */
219: { &vop_strategy_desc, fifo_strategy }, /* strategy */
220: { &vop_print_desc, ufs_print }, /* print */
221: { &vop_islocked_desc, ufs_islocked }, /* islocked */
222: { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
223: { &vop_advlock_desc, fifo_advlock }, /* advlock */
224: { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
225: { &vop_valloc_desc, fifo_valloc }, /* valloc */
226: { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */
227: { &vop_vfree_desc, ffs_vfree }, /* vfree */
228: { &vop_truncate_desc, fifo_truncate }, /* truncate */
229: { &vop_update_desc, ffs_update }, /* update */
1.8 mycroft 230: { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
1.6 christos 231: { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
1.1 mycroft 232: };
233: struct vnodeopv_desc ffs_fifoop_opv_desc =
234: { &ffs_fifoop_p, ffs_fifoop_entries };
235:
236: int doclusterread = 1;
237: int doclusterwrite = 1;
238:
239: #include <ufs/ufs/ufs_readwrite.c>
240:
241: /*
242: * Reclaim an inode so that it can be used for other purposes.
243: */
244: int
1.6 christos 245: ffs_reclaim(v)
246: void *v;
247: {
1.1 mycroft 248: struct vop_reclaim_args /* {
249: struct vnode *a_vp;
1.12 fvdl 250: struct proc *a_p;
1.6 christos 251: } */ *ap = v;
1.1 mycroft 252: register struct vnode *vp = ap->a_vp;
253: int error;
254:
1.12 fvdl 255: if ((error = ufs_reclaim(vp, ap->a_p)) != 0)
1.1 mycroft 256: return (error);
1.16.2.1 chs 257:
1.16 thorpej 258: /*
259: * XXX MFS ends up here, too, to free an inode. Should we create
260: * XXX a separate pool for MFS inodes?
261: */
262: pool_put(&ffs_inode_pool, vp->v_data);
1.1 mycroft 263: vp->v_data = NULL;
264: return (0);
265: }
1.16.2.1 chs 266:
267: #ifdef UBC
268: #include <uvm/uvm.h>
269:
270: int
271: ffs_getpages(v)
272: void *v;
273: {
274: struct vop_getpages_args /* {
275: struct vnode *a_vp;
276: vaddr_t a_offset;
277: vm_page_t *a_m;
278: int *a_count;
279: int a_centeridx;
280: vm_prot_t a_access_type;
281: int a_advice;
282: int a_flags;
283: } */ *ap = v;
284:
1.16.2.3! chs 285: int i, error, npages;
1.16.2.1 chs 286: vm_page_t m;
287: vaddr_t kva;
288: struct buf tmpbuf, *bp;
289: struct vnode *vp = ap->a_vp;
290: struct uvm_object *uobj = &vp->v_uvm.u_obj;
291: struct inode *ip = VTOI(vp);
292: struct fs *fs = ip->i_fs;
293: UVMHIST_FUNC("ffs_getpages"); UVMHIST_CALLED(ubchist);
294:
1.16.2.3! chs 295: #ifdef DIAGNOSTIC
! 296: if (ap->a_centeridx < 0 || ap->a_centeridx > *ap->a_count) {
! 297: panic("ffs_getpages: centeridx %d out of range",
! 298: ap->a_centeridx);
! 299: }
! 300: #endif
! 301:
1.16.2.1 chs 302: if (ap->a_flags & PGO_LOCKED) {
1.16.2.3! chs 303: uvn_findpages(uobj, ap->a_offset, ap->a_count, ap->a_m,
! 304: UFP_NOWAIT|UFP_NOALLOC);
! 305:
! 306: /* XXX PGO_ALLPAGES? */
! 307: return ap->a_m[ap->a_centeridx] == NULL ?
! 308: VM_PAGER_UNLOCK : VM_PAGER_OK;
1.16.2.1 chs 309: }
310:
311: /* vnode is VOP_LOCKed, uobj is locked */
312:
1.16.2.3! chs 313: /*
! 314: * XXX
! 315: * first see if center page already exists.
! 316: * this is needed because ubc_fault() doesn't
! 317: * do a PGO_LOCKED call first.
! 318: * if the page exists, return it.
! 319: */
1.16.2.1 chs 320:
1.16.2.3! chs 321: npages = 1;
! 322: uvn_findpages(uobj, ap->a_offset + (ap->a_centeridx << PAGE_SHIFT),
! 323: &npages, &ap->a_m[ap->a_centeridx], UFP_NOALLOC);
! 324: if (npages == 1) {
! 325: simple_unlock(&uobj->vmobjlock);
! 326: return VM_PAGER_OK;
1.16.2.1 chs 327: }
328:
1.16.2.3! chs 329: npages = 1;
! 330: uvn_findpages(uobj, ap->a_offset, &npages, ap->a_m, 0);
1.16.2.1 chs 331: m = ap->a_m[ap->a_centeridx];
332:
333: simple_unlock(&uobj->vmobjlock);
334:
335: if ((m->flags & PG_FAKE) == 0) {
336: UVMHIST_LOG(ubchist, "page was valid",0,0,0,0);
1.16.2.3! chs 337: return VM_PAGER_OK;
1.16.2.1 chs 338: }
339:
340: bp = &tmpbuf;
341: bzero(bp, sizeof *bp);
342:
343: bp->b_lblkno = lblkno(fs, m->offset);
1.16.2.3! chs 344: if (m->blkno == 0) {
! 345: error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL);
! 346: if (error) {
1.16.2.1 chs 347: UVMHIST_LOG(ubchist, "VOP_BMAP error %d", error,0,0,0);
1.16.2.3! chs 348: return (error);
! 349: }
1.16.2.1 chs 350: UVMHIST_LOG(ubchist, "VOP_BMAP gave 0x%x", bp->b_blkno,0,0,0);
1.16.2.3! chs 351: if (bp->b_blkno == (daddr_t)-1) {
! 352:
! 353: /*
! 354: * XXX pre-allocate blocks here someday?
! 355: * ... only for write accesses.
! 356: * for read accesses we can skip the block allocation
! 357: * if we can arrange to be called again
! 358: * when a subsequent write access occurs.
! 359: * needs support in uvm_fault().
! 360: */
! 361: uvm_pagezero(m);
! 362: m->flags &= ~(PG_FAKE);
! 363: pmap_clear_modify(PMAP_PGARG(m));
! 364: pmap_clear_reference(PMAP_PGARG(m));
! 365: return VM_PAGER_OK;
! 366: }
1.16.2.1 chs 367: }
368:
369: /* adjust physical blkno for partial blocks */
370: bp->b_blkno += (m->offset - lblktosize(fs, bp->b_lblkno)) >> DEV_BSHIFT;
371: m->blkno = bp->b_blkno;
372:
1.16.2.3! chs 373: UVMHIST_LOG(ubchist, "vp %p lblkno 0x%x blkno 0x%x",
! 374: vp, bp->b_lblkno, bp->b_blkno, 0);
! 375:
! 376: /*
! 377: * don't bother reading the pages if we're just going to
! 378: * overwrite them.
! 379: */
! 380: if (ap->a_flags & PGO_OVERWRITE) {
! 381: for (i = 0; i < *ap->a_count; i++) {
! 382:
! 383: /* XXX for now, zero the pages */
! 384: if (ap->a_m[i]->flags & PG_FAKE) {
! 385: uvm_pagezero(ap->a_m[i]);
! 386: ap->a_m[i]->flags &= ~(PG_FAKE);
! 387: }
! 388: }
! 389: return VM_PAGER_OK;
! 390: }
! 391:
! 392: kva = uvm_pagermapin(ap->a_m, *ap->a_count, NULL, M_WAITOK);
! 393: if (kva == 0) {
! 394: /* XXX unbusy pages */
! 395: return VM_PAGER_AGAIN;
! 396: }
! 397:
! 398: bp->b_bufsize = PAGE_SIZE;
! 399: bp->b_data = (void *)kva;
! 400: bp->b_bcount = bp->b_lblkno < 0 ? bp->b_bufsize :
! 401: min(bp->b_bufsize,
! 402: fragroundup(fs, vp->v_uvm.u_size - m->offset));
! 403: bp->b_vp = vp;
! 404: bp->b_flags = B_BUSY|B_READ;
! 405:
! 406: UVMHIST_LOG(ubchist, "bp %p vp %p blkno 0x%x", bp, vp, bp->b_lblkno, 0);
1.16.2.1 chs 407:
408: VOP_STRATEGY(bp);
409: error = biowait(bp);
410:
411: UVMHIST_LOG(ubchist, "error %d", error,0,0,0);
412:
413: uvm_pagermapout(kva, *ap->a_count);
414:
415: if (error) {
416: simple_lock(&uobj->vmobjlock);
417: if (m->flags & PG_WANTED)
1.16.2.3! chs 418: wakeup(m);
1.16.2.1 chs 419: m->flags &= ~(PG_WANTED|PG_BUSY);
420: UVM_PAGE_OWN(m, NULL);
421: uvm_lock_pageq();
422: uvm_pagefree(m);
423: uvm_unlock_pageq();
424: simple_unlock(&uobj->vmobjlock);
425: } else {
1.16.2.3! chs 426: m->flags &= ~(PG_FAKE);
1.16.2.1 chs 427: pmap_clear_modify(PMAP_PGARG(m));
428: }
429:
1.16.2.3! chs 430: return error ? VM_PAGER_ERROR : VM_PAGER_OK;
1.16.2.1 chs 431: }
432:
433: /*
434: * Vnode op for VM putpages.
435: */
436: int
437: ffs_putpages(v)
438: void *v;
439: {
440: struct vop_putpages_args /* {
441: struct vnode *a_vp;
1.16.2.3! chs 442: struct vm_page **a_m;
1.16.2.1 chs 443: int a_count;
444: int a_sync;
445: int *a_rtvals;
446: } */ *ap = v;
447:
1.16.2.3! chs 448: int s, error;
! 449: vaddr_t kva, offset;
! 450: struct vm_page *pg;
1.16.2.1 chs 451: struct buf tmpbuf, *bp;
452: struct vnode *vp = ap->a_vp;
453: struct inode *ip = VTOI(vp);
454: struct fs *fs = ip->i_fs;
455: struct ucred *cred = curproc->p_ucred; /* XXX curproc */
456: UVMHIST_FUNC("ffs_putpages"); UVMHIST_CALLED(ubchist);
457:
1.16.2.3! chs 458: pg = ap->a_m[0];
! 459:
! 460: #ifdef DIAGNOSTIC
! 461: if (ap->a_count > 1) {
! 462: int i;
! 463:
! 464: for (i = 1; i < ap->a_count; i++) {
! 465: if (ap->a_m[i]->blkno !=
! 466: pg->blkno + i * (PAGE_SIZE >> DEV_BSHIFT)) {
! 467: panic("ffs_putpages: pg %p %p not clusterable",
! 468: pg, ap->a_m[i]);
! 469: }
! 470: }
1.16.2.2 chs 471: }
1.16.2.3! chs 472: #endif
1.16.2.1 chs 473:
474: kva = uvm_pagermapin(ap->a_m, ap->a_count, NULL, M_WAITOK);
1.16.2.2 chs 475: if (kva == 0) {
1.16.2.3! chs 476: return VM_PAGER_AGAIN;
1.16.2.1 chs 477: }
478:
1.16.2.3! chs 479: if (ap->a_sync) {
! 480: bp = &tmpbuf;
! 481: bzero(bp, sizeof *bp);
! 482: }
! 483: else {
! 484: struct uvm_aiobuf *abp = pool_get(uvm_aiobuf_pool, PR_WAITOK);
! 485: abp->aio.aiodone = uvm_aio_aiodone;
! 486: abp->aio.kva = kva;
! 487: abp->aio.npages = ap->a_count;
! 488: abp->aio.pd_ptr = abp;
! 489: bp = &abp->buf;
! 490: bzero(bp, sizeof *bp);
! 491: bp->b_flags = B_CALL|B_ASYNC;
! 492: bp->b_iodone = uvm_aio_biodone;
! 493: }
1.16.2.1 chs 494:
1.16.2.3! chs 495: offset = pg->offset;
! 496: bp->b_bufsize = ap->a_count << PAGE_SHIFT;
1.16.2.1 chs 497: bp->b_data = (void *)kva;
1.16.2.3! chs 498: bp->b_lblkno = lblkno(fs, offset);
! 499: bp->b_bcount = min(bp->b_bufsize,
! 500: fragroundup(fs, vp->v_uvm.u_size - offset));
! 501: bp->b_flags |= B_BUSY|B_WRITE;
1.16.2.1 chs 502: bp->b_vp = vp;
503:
504: /*
505: * if the blkno wasn't set in the page, do a bmap to find it.
1.16.2.3! chs 506: * this should only happen if the block is unallocated.
1.16.2.1 chs 507: * we'll always want to set the page's blkno if it's allocated
508: * to help prevent memory deadlocks. we probably even want to
1.16.2.3! chs 509: * allocate blocks in VOP_GETPAGES() for this same reason.
1.16.2.1 chs 510: *
511: * once we switch to doing that, the page should always have a blkno.
512: * but for now, we'll handle allocating blocks here too.
1.16.2.3! chs 513: *
! 514: * XXX this doesn't handle blocksizes smaller than PAGE_SIZE.
1.16.2.1 chs 515: */
516:
1.16.2.3! chs 517: bp->b_blkno = pg->blkno;
1.16.2.1 chs 518: if (bp->b_blkno == 0) {
1.16.2.3! chs 519: int bsize;
! 520:
! 521: #ifdef DEBUG
1.16.2.1 chs 522: error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL);
523: if (error) {
1.16.2.3! chs 524: goto out;
1.16.2.1 chs 525: }
1.16.2.3! chs 526: if (bp->b_blkno != (daddr_t)-1) {
! 527: panic("ffs_putpage: page %p has blkno 0, not %d\n",
! 528: pg, bp->b_blkno);
! 529: }
! 530: #endif
! 531: bsize = blksize(fs, ip, lblkno(fs, offset));
! 532: error = ffs_balloc(ip, bp->b_lblkno, bsize, cred, NULL,
! 533: &bp->b_blkno, 0, NULL);
1.16.2.1 chs 534: if (error) {
1.16.2.3! chs 535: UVMHIST_LOG(ubchist, "ffs_balloc -> %d", error, 0,0,0);
! 536: goto out;
1.16.2.1 chs 537: }
538:
539: /* adjust physical blkno for partial blocks */
1.16.2.3! chs 540: bp->b_blkno += ((offset - lblktosize(fs, bp->b_lblkno))
1.16.2.1 chs 541: >> DEV_BSHIFT);
1.16.2.3! chs 542: pg->blkno = bp->b_blkno;
1.16.2.1 chs 543: }
544:
1.16.2.3! chs 545: UVMHIST_LOG(ubchist, "pg %p vp %p lblkno 0x%x blkno 0x%x",
! 546: pg, vp, bp->b_lblkno, bp->b_blkno);
1.16.2.1 chs 547:
1.16.2.3! chs 548: s = splbio();
1.16.2.1 chs 549: vp->v_numoutput++;
1.16.2.3! chs 550: splx(s);
1.16.2.1 chs 551:
552: VOP_STRATEGY(bp);
1.16.2.3! chs 553: if (!ap->a_sync) {
! 554: return VM_PAGER_PEND;
! 555: }
1.16.2.1 chs 556:
557: error = biowait(bp);
558:
1.16.2.3! chs 559: out:
1.16.2.1 chs 560: UVMHIST_LOG(ubchist, "error %d", error,0,0,0);
561: uvm_pagermapout(kva, ap->a_count);
562:
1.16.2.3! chs 563: return error ? VM_PAGER_ERROR : VM_PAGER_OK;
1.16.2.1 chs 564: }
565: #endif
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