| 1 | /* |
| 2 | * Copyright (c) 2000-2001, Boris Popov |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by Boris Popov. |
| 16 | * 4. Neither the name of the author nor the names of any co-contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | * |
| 32 | * $FreeBSD: src/sys/fs/smbfs/smbfs_io.c,v 1.3.2.3 2003/01/17 08:20:26 tjr Exp $ |
| 33 | * $DragonFly: src/sys/vfs/smbfs/smbfs_io.c,v 1.4 2003/06/26 05:55:12 dillon Exp $ |
| 34 | * |
| 35 | */ |
| 36 | #include <sys/param.h> |
| 37 | #include <sys/systm.h> |
| 38 | #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ |
| 39 | #include <sys/kernel.h> |
| 40 | #include <sys/proc.h> |
| 41 | #include <sys/fcntl.h> |
| 42 | #include <sys/mount.h> |
| 43 | #include <sys/namei.h> |
| 44 | #include <sys/vnode.h> |
| 45 | #include <sys/dirent.h> |
| 46 | #include <sys/signalvar.h> |
| 47 | #include <sys/sysctl.h> |
| 48 | |
| 49 | #include <vm/vm.h> |
| 50 | #include <vm/vm_page.h> |
| 51 | #include <vm/vm_extern.h> |
| 52 | #include <vm/vm_object.h> |
| 53 | #include <vm/vm_pager.h> |
| 54 | #include <vm/vnode_pager.h> |
| 55 | /* |
| 56 | #include <sys/ioccom.h> |
| 57 | */ |
| 58 | #include <netsmb/smb.h> |
| 59 | #include <netsmb/smb_conn.h> |
| 60 | #include <netsmb/smb_subr.h> |
| 61 | |
| 62 | #include <fs/smbfs/smbfs.h> |
| 63 | #include <fs/smbfs/smbfs_node.h> |
| 64 | #include <fs/smbfs/smbfs_subr.h> |
| 65 | |
| 66 | #include <sys/buf.h> |
| 67 | |
| 68 | /*#define SMBFS_RWGENERIC*/ |
| 69 | |
| 70 | extern int smbfs_pbuf_freecnt; |
| 71 | |
| 72 | static int smbfs_fastlookup = 1; |
| 73 | |
| 74 | extern struct linker_set sysctl_vfs_smbfs; |
| 75 | |
| 76 | SYSCTL_DECL(_vfs_smbfs); |
| 77 | SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); |
| 78 | |
| 79 | |
| 80 | #define DE_SIZE (sizeof(struct dirent)) |
| 81 | |
| 82 | static int |
| 83 | smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) |
| 84 | { |
| 85 | struct dirent de; |
| 86 | struct componentname cn; |
| 87 | struct smb_cred scred; |
| 88 | struct smbfs_fctx *ctx; |
| 89 | struct vnode *newvp; |
| 90 | struct smbnode *np = VTOSMB(vp); |
| 91 | int error/*, *eofflag = ap->a_eofflag*/; |
| 92 | long offset, limit; |
| 93 | |
| 94 | np = VTOSMB(vp); |
| 95 | SMBVDEBUG("dirname='%s'\n", np->n_name); |
| 96 | smb_makescred(&scred, uio->uio_td, cred); |
| 97 | offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ |
| 98 | limit = uio->uio_resid / DE_SIZE; |
| 99 | if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) |
| 100 | return EINVAL; |
| 101 | while (limit && offset < 2) { |
| 102 | limit--; |
| 103 | bzero((caddr_t)&de, DE_SIZE); |
| 104 | de.d_reclen = DE_SIZE; |
| 105 | de.d_fileno = (offset == 0) ? np->n_ino : |
| 106 | (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); |
| 107 | if (de.d_fileno == 0) |
| 108 | de.d_fileno = 0x7ffffffd + offset; |
| 109 | de.d_namlen = offset + 1; |
| 110 | de.d_name[0] = '.'; |
| 111 | de.d_name[1] = '.'; |
| 112 | de.d_name[offset + 1] = '\0'; |
| 113 | de.d_type = DT_DIR; |
| 114 | error = uiomove((caddr_t)&de, DE_SIZE, uio); |
| 115 | if (error) |
| 116 | return error; |
| 117 | offset++; |
| 118 | uio->uio_offset += DE_SIZE; |
| 119 | } |
| 120 | if (limit == 0) |
| 121 | return 0; |
| 122 | if (offset != np->n_dirofs || np->n_dirseq == NULL) { |
| 123 | SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); |
| 124 | if (np->n_dirseq) { |
| 125 | smbfs_findclose(np->n_dirseq, &scred); |
| 126 | np->n_dirseq = NULL; |
| 127 | } |
| 128 | np->n_dirofs = 2; |
| 129 | error = smbfs_findopen(np, "*", 1, |
| 130 | SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, |
| 131 | &scred, &ctx); |
| 132 | if (error) { |
| 133 | SMBVDEBUG("can not open search, error = %d", error); |
| 134 | return error; |
| 135 | } |
| 136 | np->n_dirseq = ctx; |
| 137 | } else |
| 138 | ctx = np->n_dirseq; |
| 139 | while (np->n_dirofs < offset) { |
| 140 | error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); |
| 141 | if (error) { |
| 142 | smbfs_findclose(np->n_dirseq, &scred); |
| 143 | np->n_dirseq = NULL; |
| 144 | return error == ENOENT ? 0 : error; |
| 145 | } |
| 146 | } |
| 147 | error = 0; |
| 148 | for (; limit; limit--, offset++) { |
| 149 | error = smbfs_findnext(ctx, limit, &scred); |
| 150 | if (error) |
| 151 | break; |
| 152 | np->n_dirofs++; |
| 153 | bzero((caddr_t)&de, DE_SIZE); |
| 154 | de.d_reclen = DE_SIZE; |
| 155 | de.d_fileno = ctx->f_attr.fa_ino; |
| 156 | de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; |
| 157 | de.d_namlen = ctx->f_nmlen; |
| 158 | bcopy(ctx->f_name, de.d_name, de.d_namlen); |
| 159 | de.d_name[de.d_namlen] = '\0'; |
| 160 | if (smbfs_fastlookup) { |
| 161 | error = smbfs_nget(vp->v_mount, vp, ctx->f_name, |
| 162 | ctx->f_nmlen, &ctx->f_attr, &newvp); |
| 163 | if (!error) { |
| 164 | cn.cn_nameptr = de.d_name; |
| 165 | cn.cn_namelen = de.d_namlen; |
| 166 | cache_enter(vp, newvp, &cn); |
| 167 | vput(newvp); |
| 168 | } |
| 169 | } |
| 170 | error = uiomove((caddr_t)&de, DE_SIZE, uio); |
| 171 | if (error) |
| 172 | break; |
| 173 | } |
| 174 | if (error == ENOENT) |
| 175 | error = 0; |
| 176 | uio->uio_offset = offset * DE_SIZE; |
| 177 | return error; |
| 178 | } |
| 179 | |
| 180 | int |
| 181 | smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) |
| 182 | { |
| 183 | struct thread *td; |
| 184 | struct smbmount *smp = VFSTOSMBFS(vp->v_mount); |
| 185 | struct smbnode *np = VTOSMB(vp); |
| 186 | struct vattr vattr; |
| 187 | struct smb_cred scred; |
| 188 | int error, lks; |
| 189 | |
| 190 | /* |
| 191 | * Protect against method which is not supported for now |
| 192 | */ |
| 193 | if (uiop->uio_segflg == UIO_NOCOPY) |
| 194 | return EOPNOTSUPP; |
| 195 | |
| 196 | if (vp->v_type != VREG && vp->v_type != VDIR) { |
| 197 | SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); |
| 198 | return EIO; |
| 199 | } |
| 200 | if (uiop->uio_resid == 0) |
| 201 | return 0; |
| 202 | if (uiop->uio_offset < 0) |
| 203 | return EINVAL; |
| 204 | /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) |
| 205 | return EFBIG;*/ |
| 206 | td = uiop->uio_td; |
| 207 | if (vp->v_type == VDIR) { |
| 208 | lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, td);*/ |
| 209 | if (lks == LK_SHARED) |
| 210 | vn_lock(vp, LK_UPGRADE | LK_RETRY, td); |
| 211 | error = smbfs_readvdir(vp, uiop, cred); |
| 212 | if (lks == LK_SHARED) |
| 213 | vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td); |
| 214 | return error; |
| 215 | } |
| 216 | |
| 217 | /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ |
| 218 | if (np->n_flag & NMODIFIED) { |
| 219 | smbfs_attr_cacheremove(vp); |
| 220 | error = VOP_GETATTR(vp, &vattr, td); |
| 221 | if (error) |
| 222 | return error; |
| 223 | np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; |
| 224 | } else { |
| 225 | error = VOP_GETATTR(vp, &vattr, td); |
| 226 | if (error) |
| 227 | return error; |
| 228 | if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { |
| 229 | error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); |
| 230 | if (error) |
| 231 | return error; |
| 232 | np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; |
| 233 | } |
| 234 | } |
| 235 | smb_makescred(&scred, td, cred); |
| 236 | return smb_read(smp->sm_share, np->n_fid, uiop, &scred); |
| 237 | } |
| 238 | |
| 239 | int |
| 240 | smbfs_writevnode(struct vnode *vp, struct uio *uiop, |
| 241 | struct ucred *cred, int ioflag) |
| 242 | { |
| 243 | struct thread *td; |
| 244 | struct smbmount *smp = VTOSMBFS(vp); |
| 245 | struct smbnode *np = VTOSMB(vp); |
| 246 | struct smb_cred scred; |
| 247 | int error = 0; |
| 248 | |
| 249 | if (vp->v_type != VREG) { |
| 250 | SMBERROR("vn types other than VREG unsupported !\n"); |
| 251 | return EIO; |
| 252 | } |
| 253 | SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); |
| 254 | if (uiop->uio_offset < 0) |
| 255 | return EINVAL; |
| 256 | /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) |
| 257 | return (EFBIG);*/ |
| 258 | td = uiop->uio_td; |
| 259 | if (ioflag & (IO_APPEND | IO_SYNC)) { |
| 260 | if (np->n_flag & NMODIFIED) { |
| 261 | smbfs_attr_cacheremove(vp); |
| 262 | error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); |
| 263 | if (error) |
| 264 | return error; |
| 265 | } |
| 266 | if (ioflag & IO_APPEND) { |
| 267 | #if notyet |
| 268 | /* |
| 269 | * File size can be changed by another client |
| 270 | */ |
| 271 | smbfs_attr_cacheremove(vp); |
| 272 | error = VOP_GETATTR(vp, &vattr, td); |
| 273 | if (error) return (error); |
| 274 | #endif |
| 275 | uiop->uio_offset = np->n_size; |
| 276 | } |
| 277 | } |
| 278 | if (uiop->uio_resid == 0) |
| 279 | return 0; |
| 280 | if (td->td_proc && |
| 281 | uiop->uio_offset + uiop->uio_resid > |
| 282 | td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { |
| 283 | psignal(td->td_proc, SIGXFSZ); |
| 284 | return EFBIG; |
| 285 | } |
| 286 | smb_makescred(&scred, td, cred); |
| 287 | error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); |
| 288 | SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); |
| 289 | if (!error) { |
| 290 | if (uiop->uio_offset > np->n_size) { |
| 291 | np->n_size = uiop->uio_offset; |
| 292 | vnode_pager_setsize(vp, np->n_size); |
| 293 | } |
| 294 | } |
| 295 | return error; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Do an I/O operation to/from a cache block. |
| 300 | */ |
| 301 | int |
| 302 | smbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td) |
| 303 | { |
| 304 | struct vnode *vp = bp->b_vp; |
| 305 | struct smbmount *smp = VFSTOSMBFS(vp->v_mount); |
| 306 | struct smbnode *np = VTOSMB(vp); |
| 307 | struct uio uio, *uiop = &uio; |
| 308 | struct iovec io; |
| 309 | struct smb_cred scred; |
| 310 | int error = 0; |
| 311 | |
| 312 | uiop->uio_iov = &io; |
| 313 | uiop->uio_iovcnt = 1; |
| 314 | uiop->uio_segflg = UIO_SYSSPACE; |
| 315 | uiop->uio_td = td; |
| 316 | |
| 317 | smb_makescred(&scred, td, cr); |
| 318 | |
| 319 | if (bp->b_flags & B_READ) { |
| 320 | io.iov_len = uiop->uio_resid = bp->b_bcount; |
| 321 | io.iov_base = bp->b_data; |
| 322 | uiop->uio_rw = UIO_READ; |
| 323 | switch (vp->v_type) { |
| 324 | case VREG: |
| 325 | uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; |
| 326 | error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); |
| 327 | if (error) |
| 328 | break; |
| 329 | if (uiop->uio_resid) { |
| 330 | int left = uiop->uio_resid; |
| 331 | int nread = bp->b_bcount - left; |
| 332 | if (left > 0) |
| 333 | bzero((char *)bp->b_data + nread, left); |
| 334 | } |
| 335 | break; |
| 336 | default: |
| 337 | printf("smbfs_doio: type %x unexpected\n",vp->v_type); |
| 338 | break; |
| 339 | }; |
| 340 | if (error) { |
| 341 | bp->b_error = error; |
| 342 | bp->b_flags |= B_ERROR; |
| 343 | } |
| 344 | } else { /* write */ |
| 345 | if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) |
| 346 | bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); |
| 347 | |
| 348 | if (bp->b_dirtyend > bp->b_dirtyoff) { |
| 349 | io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; |
| 350 | uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; |
| 351 | io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; |
| 352 | uiop->uio_rw = UIO_WRITE; |
| 353 | bp->b_flags |= B_WRITEINPROG; |
| 354 | error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); |
| 355 | bp->b_flags &= ~B_WRITEINPROG; |
| 356 | |
| 357 | /* |
| 358 | * For an interrupted write, the buffer is still valid |
| 359 | * and the write hasn't been pushed to the server yet, |
| 360 | * so we can't set BIO_ERROR and report the interruption |
| 361 | * by setting B_EINTR. For the B_ASYNC case, B_EINTR |
| 362 | * is not relevant, so the rpc attempt is essentially |
| 363 | * a noop. For the case of a V3 write rpc not being |
| 364 | * committed to stable storage, the block is still |
| 365 | * dirty and requires either a commit rpc or another |
| 366 | * write rpc with iomode == NFSV3WRITE_FILESYNC before |
| 367 | * the block is reused. This is indicated by setting |
| 368 | * the B_DELWRI and B_NEEDCOMMIT flags. |
| 369 | */ |
| 370 | if (error == EINTR |
| 371 | || (!error && (bp->b_flags & B_NEEDCOMMIT))) { |
| 372 | int s; |
| 373 | |
| 374 | s = splbio(); |
| 375 | bp->b_flags &= ~(B_INVAL|B_NOCACHE); |
| 376 | if ((bp->b_flags & B_ASYNC) == 0) |
| 377 | bp->b_flags |= B_EINTR; |
| 378 | if ((bp->b_flags & B_PAGING) == 0) { |
| 379 | bdirty(bp); |
| 380 | bp->b_flags &= ~B_DONE; |
| 381 | } |
| 382 | if ((bp->b_flags & B_ASYNC) == 0) |
| 383 | bp->b_flags |= B_EINTR; |
| 384 | splx(s); |
| 385 | } else { |
| 386 | if (error) { |
| 387 | bp->b_flags |= B_ERROR; |
| 388 | bp->b_error = error; |
| 389 | } |
| 390 | bp->b_dirtyoff = bp->b_dirtyend = 0; |
| 391 | } |
| 392 | } else { |
| 393 | bp->b_resid = 0; |
| 394 | biodone(bp); |
| 395 | return 0; |
| 396 | } |
| 397 | } |
| 398 | bp->b_resid = uiop->uio_resid; |
| 399 | biodone(bp); |
| 400 | return error; |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Vnode op for VM getpages. |
| 405 | * Wish wish .... get rid from multiple IO routines |
| 406 | */ |
| 407 | int |
| 408 | smbfs_getpages(ap) |
| 409 | struct vop_getpages_args /* { |
| 410 | struct vnode *a_vp; |
| 411 | vm_page_t *a_m; |
| 412 | int a_count; |
| 413 | int a_reqpage; |
| 414 | vm_ooffset_t a_offset; |
| 415 | } */ *ap; |
| 416 | { |
| 417 | #ifdef SMBFS_RWGENERIC |
| 418 | return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, |
| 419 | ap->a_reqpage); |
| 420 | #else |
| 421 | int i, error, nextoff, size, toff, npages, count; |
| 422 | struct uio uio; |
| 423 | struct iovec iov; |
| 424 | vm_offset_t kva; |
| 425 | struct buf *bp; |
| 426 | struct vnode *vp; |
| 427 | struct thread *td = curthread; /* XXX */ |
| 428 | struct ucred *cred; |
| 429 | struct smbmount *smp; |
| 430 | struct smbnode *np; |
| 431 | struct smb_cred scred; |
| 432 | vm_page_t *pages; |
| 433 | |
| 434 | KKASSERT(td->td_proc); |
| 435 | |
| 436 | vp = ap->a_vp; |
| 437 | cred = td->td_proc->p_ucred; |
| 438 | np = VTOSMB(vp); |
| 439 | smp = VFSTOSMBFS(vp->v_mount); |
| 440 | pages = ap->a_m; |
| 441 | count = ap->a_count; |
| 442 | |
| 443 | if (vp->v_object == NULL) { |
| 444 | printf("smbfs_getpages: called with non-merged cache vnode??\n"); |
| 445 | return VM_PAGER_ERROR; |
| 446 | } |
| 447 | smb_makescred(&scred, td, cred); |
| 448 | |
| 449 | bp = getpbuf(&smbfs_pbuf_freecnt); |
| 450 | npages = btoc(count); |
| 451 | kva = (vm_offset_t) bp->b_data; |
| 452 | pmap_qenter(kva, pages, npages); |
| 453 | |
| 454 | iov.iov_base = (caddr_t) kva; |
| 455 | iov.iov_len = count; |
| 456 | uio.uio_iov = &iov; |
| 457 | uio.uio_iovcnt = 1; |
| 458 | uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); |
| 459 | uio.uio_resid = count; |
| 460 | uio.uio_segflg = UIO_SYSSPACE; |
| 461 | uio.uio_rw = UIO_READ; |
| 462 | uio.uio_td = td; |
| 463 | |
| 464 | error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); |
| 465 | pmap_qremove(kva, npages); |
| 466 | |
| 467 | relpbuf(bp, &smbfs_pbuf_freecnt); |
| 468 | |
| 469 | if (error && (uio.uio_resid == count)) { |
| 470 | printf("smbfs_getpages: error %d\n",error); |
| 471 | for (i = 0; i < npages; i++) { |
| 472 | if (ap->a_reqpage != i) |
| 473 | vnode_pager_freepage(pages[i]); |
| 474 | } |
| 475 | return VM_PAGER_ERROR; |
| 476 | } |
| 477 | |
| 478 | size = count - uio.uio_resid; |
| 479 | |
| 480 | for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { |
| 481 | vm_page_t m; |
| 482 | nextoff = toff + PAGE_SIZE; |
| 483 | m = pages[i]; |
| 484 | |
| 485 | m->flags &= ~PG_ZERO; |
| 486 | |
| 487 | if (nextoff <= size) { |
| 488 | m->valid = VM_PAGE_BITS_ALL; |
| 489 | m->dirty = 0; |
| 490 | } else { |
| 491 | int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1); |
| 492 | vm_page_set_validclean(m, 0, nvalid); |
| 493 | } |
| 494 | |
| 495 | if (i != ap->a_reqpage) { |
| 496 | /* |
| 497 | * Whether or not to leave the page activated is up in |
| 498 | * the air, but we should put the page on a page queue |
| 499 | * somewhere (it already is in the object). Result: |
| 500 | * It appears that emperical results show that |
| 501 | * deactivating pages is best. |
| 502 | */ |
| 503 | |
| 504 | /* |
| 505 | * Just in case someone was asking for this page we |
| 506 | * now tell them that it is ok to use. |
| 507 | */ |
| 508 | if (!error) { |
| 509 | if (m->flags & PG_WANTED) |
| 510 | vm_page_activate(m); |
| 511 | else |
| 512 | vm_page_deactivate(m); |
| 513 | vm_page_wakeup(m); |
| 514 | } else { |
| 515 | vnode_pager_freepage(m); |
| 516 | } |
| 517 | } |
| 518 | } |
| 519 | return 0; |
| 520 | #endif /* SMBFS_RWGENERIC */ |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * Vnode op for VM putpages. |
| 525 | * possible bug: all IO done in sync mode |
| 526 | * Note that vop_close always invalidate pages before close, so it's |
| 527 | * not necessary to open vnode. |
| 528 | */ |
| 529 | int |
| 530 | smbfs_putpages(ap) |
| 531 | struct vop_putpages_args /* { |
| 532 | struct vnode *a_vp; |
| 533 | vm_page_t *a_m; |
| 534 | int a_count; |
| 535 | int a_sync; |
| 536 | int *a_rtvals; |
| 537 | vm_ooffset_t a_offset; |
| 538 | } */ *ap; |
| 539 | { |
| 540 | int error; |
| 541 | struct vnode *vp = ap->a_vp; |
| 542 | struct thread *td = curthread; /* XXX */ |
| 543 | struct ucred *cred; |
| 544 | |
| 545 | #ifdef SMBFS_RWGENERIC |
| 546 | KKASSERT(td->td_proc); |
| 547 | cred = td->td_proc->p_ucred; |
| 548 | VOP_OPEN(vp, FWRITE, cred, td); |
| 549 | error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, |
| 550 | ap->a_sync, ap->a_rtvals); |
| 551 | VOP_CLOSE(vp, FWRITE, cred, td); |
| 552 | return error; |
| 553 | #else |
| 554 | struct uio uio; |
| 555 | struct iovec iov; |
| 556 | vm_offset_t kva; |
| 557 | struct buf *bp; |
| 558 | int i, npages, count; |
| 559 | int *rtvals; |
| 560 | struct smbmount *smp; |
| 561 | struct smbnode *np; |
| 562 | struct smb_cred scred; |
| 563 | vm_page_t *pages; |
| 564 | |
| 565 | KKASSERT(td->td_proc); |
| 566 | cred = td->td_proc->p_ucred; |
| 567 | /* VOP_OPEN(vp, FWRITE, cred, td);*/ |
| 568 | np = VTOSMB(vp); |
| 569 | smp = VFSTOSMBFS(vp->v_mount); |
| 570 | pages = ap->a_m; |
| 571 | count = ap->a_count; |
| 572 | rtvals = ap->a_rtvals; |
| 573 | npages = btoc(count); |
| 574 | |
| 575 | for (i = 0; i < npages; i++) { |
| 576 | rtvals[i] = VM_PAGER_AGAIN; |
| 577 | } |
| 578 | |
| 579 | bp = getpbuf(&smbfs_pbuf_freecnt); |
| 580 | kva = (vm_offset_t) bp->b_data; |
| 581 | pmap_qenter(kva, pages, npages); |
| 582 | |
| 583 | iov.iov_base = (caddr_t) kva; |
| 584 | iov.iov_len = count; |
| 585 | uio.uio_iov = &iov; |
| 586 | uio.uio_iovcnt = 1; |
| 587 | uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); |
| 588 | uio.uio_resid = count; |
| 589 | uio.uio_segflg = UIO_SYSSPACE; |
| 590 | uio.uio_rw = UIO_WRITE; |
| 591 | uio.uio_td = td; |
| 592 | SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); |
| 593 | |
| 594 | smb_makescred(&scred, td, cred); |
| 595 | error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); |
| 596 | /* VOP_CLOSE(vp, FWRITE, cred, td);*/ |
| 597 | SMBVDEBUG("paged write done: %d\n", error); |
| 598 | |
| 599 | pmap_qremove(kva, npages); |
| 600 | relpbuf(bp, &smbfs_pbuf_freecnt); |
| 601 | |
| 602 | if (!error) { |
| 603 | int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE; |
| 604 | for (i = 0; i < nwritten; i++) { |
| 605 | rtvals[i] = VM_PAGER_OK; |
| 606 | pages[i]->dirty = 0; |
| 607 | } |
| 608 | } |
| 609 | return rtvals[0]; |
| 610 | #endif /* SMBFS_RWGENERIC */ |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * Flush and invalidate all dirty buffers. If another process is already |
| 615 | * doing the flush, just wait for completion. |
| 616 | */ |
| 617 | int |
| 618 | smbfs_vinvalbuf(vp, flags, td, intrflg) |
| 619 | struct vnode *vp; |
| 620 | int flags; |
| 621 | struct thread *td; |
| 622 | int intrflg; |
| 623 | { |
| 624 | struct smbnode *np = VTOSMB(vp); |
| 625 | int error = 0, slpflag, slptimeo; |
| 626 | |
| 627 | if (vp->v_flag & VXLOCK) |
| 628 | return 0; |
| 629 | if (intrflg) { |
| 630 | slpflag = PCATCH; |
| 631 | slptimeo = 2 * hz; |
| 632 | } else { |
| 633 | slpflag = 0; |
| 634 | slptimeo = 0; |
| 635 | } |
| 636 | while (np->n_flag & NFLUSHINPROG) { |
| 637 | np->n_flag |= NFLUSHWANT; |
| 638 | error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo); |
| 639 | error = smb_proc_intr(td); |
| 640 | if (error == EINTR && intrflg) |
| 641 | return EINTR; |
| 642 | } |
| 643 | np->n_flag |= NFLUSHINPROG; |
| 644 | error = vinvalbuf(vp, flags, td, slpflag, 0); |
| 645 | while (error) { |
| 646 | if (intrflg && (error == ERESTART || error == EINTR)) { |
| 647 | np->n_flag &= ~NFLUSHINPROG; |
| 648 | if (np->n_flag & NFLUSHWANT) { |
| 649 | np->n_flag &= ~NFLUSHWANT; |
| 650 | wakeup((caddr_t)&np->n_flag); |
| 651 | } |
| 652 | return EINTR; |
| 653 | } |
| 654 | error = vinvalbuf(vp, flags, td, slpflag, 0); |
| 655 | } |
| 656 | np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); |
| 657 | if (np->n_flag & NFLUSHWANT) { |
| 658 | np->n_flag &= ~NFLUSHWANT; |
| 659 | wakeup((caddr_t)&np->n_flag); |
| 660 | } |
| 661 | return (error); |
| 662 | } |