The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/fs/smbfs/smbfs_io.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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: releng/5.0/sys/fs/smbfs/smbfs_io.c 105077 2002-10-14 03:20:36Z mckusick $
   33  *
   34  */
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/resourcevar.h>    /* defines plimit structure in proc struct */
   38 #include <sys/kernel.h>
   39 #include <sys/proc.h>
   40 #include <sys/fcntl.h>
   41 #include <sys/bio.h>
   42 #include <sys/buf.h>
   43 #include <sys/mount.h>
   44 #include <sys/namei.h>
   45 #include <sys/vnode.h>
   46 #include <sys/dirent.h>
   47 #include <sys/signalvar.h>
   48 #include <sys/sysctl.h>
   49 #include <sys/vmmeter.h>
   50 
   51 #include <vm/vm.h>
   52 #include <vm/vm_page.h>
   53 #include <vm/vm_extern.h>
   54 #include <vm/vm_object.h>
   55 #include <vm/vm_pager.h>
   56 #include <vm/vnode_pager.h>
   57 /*
   58 #include <sys/ioccom.h>
   59 */
   60 #include <netsmb/smb.h>
   61 #include <netsmb/smb_conn.h>
   62 #include <netsmb/smb_subr.h>
   63 
   64 #include <fs/smbfs/smbfs.h>
   65 #include <fs/smbfs/smbfs_node.h>
   66 #include <fs/smbfs/smbfs_subr.h>
   67 
   68 /*#define SMBFS_RWGENERIC*/
   69 
   70 extern int smbfs_pbuf_freecnt;
   71 
   72 static int smbfs_fastlookup = 1;
   73 
   74 SYSCTL_DECL(_vfs_smbfs);
   75 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
   76 
   77 
   78 #define DE_SIZE (sizeof(struct dirent))
   79 
   80 static int
   81 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
   82 {
   83         struct dirent de;
   84         struct componentname cn;
   85         struct smb_cred scred;
   86         struct smbfs_fctx *ctx;
   87         struct vnode *newvp;
   88         struct smbnode *np = VTOSMB(vp);
   89         int error/*, *eofflag = ap->a_eofflag*/;
   90         long offset, limit;
   91 
   92         np = VTOSMB(vp);
   93         SMBVDEBUG("dirname='%s'\n", np->n_name);
   94         smb_makescred(&scred, uio->uio_td, cred);
   95         offset = uio->uio_offset / DE_SIZE;     /* offset in the directory */
   96         limit = uio->uio_resid / DE_SIZE;
   97         if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
   98                 return EINVAL;
   99         while (limit && offset < 2) {
  100                 limit--;
  101                 bzero((caddr_t)&de, DE_SIZE);
  102                 de.d_reclen = DE_SIZE;
  103                 de.d_fileno = (offset == 0) ? np->n_ino :
  104                     (np->n_parent ? np->n_parent->n_ino : 2);
  105                 if (de.d_fileno == 0)
  106                         de.d_fileno = 0x7ffffffd + offset;
  107                 de.d_namlen = offset + 1;
  108                 de.d_name[0] = '.';
  109                 de.d_name[1] = '.';
  110                 de.d_name[offset + 1] = '\0';
  111                 de.d_type = DT_DIR;
  112                 error = uiomove((caddr_t)&de, DE_SIZE, uio);
  113                 if (error)
  114                         return error;
  115                 offset++;
  116                 uio->uio_offset += DE_SIZE;
  117         }
  118         if (limit == 0)
  119                 return 0;
  120         if (offset != np->n_dirofs || np->n_dirseq == NULL) {
  121                 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
  122                 if (np->n_dirseq) {
  123                         smbfs_findclose(np->n_dirseq, &scred);
  124                         np->n_dirseq = NULL;
  125                 }
  126                 np->n_dirofs = 2;
  127                 error = smbfs_findopen(np, "*", 1,
  128                     SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
  129                     &scred, &ctx);
  130                 if (error) {
  131                         SMBVDEBUG("can not open search, error = %d", error);
  132                         return error;
  133                 }
  134                 np->n_dirseq = ctx;
  135         } else
  136                 ctx = np->n_dirseq;
  137         while (np->n_dirofs < offset) {
  138                 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred);
  139                 if (error) {
  140                         smbfs_findclose(np->n_dirseq, &scred);
  141                         np->n_dirseq = NULL;
  142                         return error == ENOENT ? 0 : error;
  143                 }
  144         }
  145         error = 0;
  146         for (; limit; limit--, offset++) {
  147                 error = smbfs_findnext(ctx, limit, &scred);
  148                 if (error)
  149                         break;
  150                 np->n_dirofs++;
  151                 bzero((caddr_t)&de, DE_SIZE);
  152                 de.d_reclen = DE_SIZE;
  153                 de.d_fileno = ctx->f_attr.fa_ino;
  154                 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
  155                 de.d_namlen = ctx->f_nmlen;
  156                 bcopy(ctx->f_name, de.d_name, de.d_namlen);
  157                 de.d_name[de.d_namlen] = '\0';
  158                 if (smbfs_fastlookup) {
  159                         error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
  160                             ctx->f_nmlen, &ctx->f_attr, &newvp);
  161                         if (!error) {
  162                                 cn.cn_nameptr = de.d_name;
  163                                 cn.cn_namelen = de.d_namlen;
  164                                 cache_enter(vp, newvp, &cn);
  165                                 vput(newvp);
  166                         }
  167                 }
  168                 error = uiomove((caddr_t)&de, DE_SIZE, uio);
  169                 if (error)
  170                         break;
  171         }
  172         if (error == ENOENT)
  173                 error = 0;
  174         uio->uio_offset = offset * DE_SIZE;
  175         return error;
  176 }
  177 
  178 int
  179 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
  180 {
  181         struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
  182         struct smbnode *np = VTOSMB(vp);
  183         struct thread *td;
  184         struct vattr vattr;
  185         struct smb_cred scred;
  186         int error, lks;
  187 
  188         /*
  189          * Protect against method which is not supported for now
  190          */
  191         if (uiop->uio_segflg == UIO_NOCOPY)
  192                 return EOPNOTSUPP;
  193 
  194         if (vp->v_type != VREG && vp->v_type != VDIR) {
  195                 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
  196                 return EIO;
  197         }
  198         if (uiop->uio_resid == 0)
  199                 return 0;
  200         if (uiop->uio_offset < 0)
  201                 return EINVAL;
  202 /*      if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
  203                 return EFBIG;*/
  204         td = uiop->uio_td;
  205         if (vp->v_type == VDIR) {
  206                 lks = LK_EXCLUSIVE;/*lockstatus(vp->v_vnlock, td);*/
  207                 if (lks == LK_SHARED)
  208                         vn_lock(vp, LK_UPGRADE | LK_RETRY, td);
  209                 error = smbfs_readvdir(vp, uiop, cred);
  210                 if (lks == LK_SHARED)
  211                         vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td);
  212                 return error;
  213         }
  214 
  215 /*      biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
  216         if (np->n_flag & NMODIFIED) {
  217                 smbfs_attr_cacheremove(vp);
  218                 error = VOP_GETATTR(vp, &vattr, cred, td);
  219                 if (error)
  220                         return error;
  221                 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
  222         } else {
  223                 error = VOP_GETATTR(vp, &vattr, cred, td);
  224                 if (error)
  225                         return error;
  226                 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
  227                         error = smbfs_vinvalbuf(vp, V_SAVE, cred, td, 1);
  228                         if (error)
  229                                 return error;
  230                         np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
  231                 }
  232         }
  233         smb_makescred(&scred, td, cred);
  234         return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
  235 }
  236 
  237 int
  238 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
  239         struct ucred *cred, int ioflag)
  240 {
  241         struct smbmount *smp = VTOSMBFS(vp);
  242         struct smbnode *np = VTOSMB(vp);
  243         struct smb_cred scred;
  244         struct proc *p;
  245         struct thread *td;
  246         int error = 0;
  247 
  248         if (vp->v_type != VREG) {
  249                 SMBERROR("vn types other than VREG unsupported !\n");
  250                 return EIO;
  251         }
  252         SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
  253         if (uiop->uio_offset < 0)
  254                 return EINVAL;
  255 /*      if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
  256                 return (EFBIG);*/
  257         td = uiop->uio_td;
  258         p = td->td_proc;
  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, cred, 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, cred, 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 (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
  281                 PROC_LOCK(td->td_proc);
  282                 psignal(td->td_proc, SIGXFSZ);
  283                 PROC_UNLOCK(td->td_proc);
  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_iocmd == BIO_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_ioflags |= BIO_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_ioflags |= BIO_ERROR;
  388                                 bp->b_error = error;
  389                         }
  390                         bp->b_dirtyoff = bp->b_dirtyend = 0;
  391                 }
  392             } else {
  393                 bp->b_resid = 0;
  394                 bufdone(bp);
  395                 return 0;
  396             }
  397         }
  398         bp->b_resid = uiop->uio_resid;
  399         bufdone(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 vop_stdgetpages(ap);
  419 #else
  420         int i, error, nextoff, size, toff, npages, count, reqpage;
  421         struct uio uio;
  422         struct iovec iov;
  423         vm_offset_t kva;
  424         struct buf *bp;
  425         struct vnode *vp;
  426         struct thread *td;
  427         struct ucred *cred;
  428         struct smbmount *smp;
  429         struct smbnode *np;
  430         struct smb_cred scred;
  431         vm_page_t *pages, m;
  432 
  433         vp = ap->a_vp;
  434         if (vp->v_object == NULL) {
  435                 printf("smbfs_getpages: called with non-merged cache vnode??\n");
  436                 return VM_PAGER_ERROR;
  437         }
  438 
  439         td = curthread;                         /* XXX */
  440         cred = td->td_ucred;            /* XXX */
  441         np = VTOSMB(vp);
  442         smp = VFSTOSMBFS(vp->v_mount);
  443         pages = ap->a_m;
  444         count = ap->a_count;
  445         npages = btoc(count);
  446         reqpage = ap->a_reqpage;
  447 
  448         /*
  449          * If the requested page is partially valid, just return it and
  450          * allow the pager to zero-out the blanks.  Partially valid pages
  451          * can only occur at the file EOF.
  452          */
  453         m = pages[reqpage];
  454 
  455         if (m->valid != 0) {
  456                 /* handled by vm_fault now        */
  457                 /* vm_page_zero_invalid(m, TRUE); */
  458                 vm_page_lock_queues();
  459                 for (i = 0; i < npages; ++i) {
  460                         if (i != reqpage)
  461                                 vm_page_free(pages[i]);
  462                 }
  463                 vm_page_unlock_queues();
  464                 return 0;
  465         }
  466 
  467         smb_makescred(&scred, td, cred);
  468 
  469         bp = getpbuf(&smbfs_pbuf_freecnt);
  470 
  471         kva = (vm_offset_t) bp->b_data;
  472         pmap_qenter(kva, pages, npages);
  473         cnt.v_vnodein++;
  474         cnt.v_vnodepgsin += npages;
  475 
  476         iov.iov_base = (caddr_t) kva;
  477         iov.iov_len = count;
  478         uio.uio_iov = &iov;
  479         uio.uio_iovcnt = 1;
  480         uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
  481         uio.uio_resid = count;
  482         uio.uio_segflg = UIO_SYSSPACE;
  483         uio.uio_rw = UIO_READ;
  484         uio.uio_td = td;
  485 
  486         error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
  487         pmap_qremove(kva, npages);
  488 
  489         relpbuf(bp, &smbfs_pbuf_freecnt);
  490 
  491         if (error && (uio.uio_resid == count)) {
  492                 printf("smbfs_getpages: error %d\n",error);
  493                 vm_page_lock_queues();
  494                 for (i = 0; i < npages; i++) {
  495                         if (reqpage != i)
  496                                 vm_page_free(pages[i]);
  497                 }
  498                 vm_page_unlock_queues();
  499                 return VM_PAGER_ERROR;
  500         }
  501 
  502         size = count - uio.uio_resid;
  503 
  504         vm_page_lock_queues();
  505         for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
  506                 vm_page_t m;
  507                 nextoff = toff + PAGE_SIZE;
  508                 m = pages[i];
  509 
  510                 m->flags &= ~PG_ZERO;
  511 
  512                 if (nextoff <= size) {
  513                         /*
  514                          * Read operation filled an entire page
  515                          */
  516                         m->valid = VM_PAGE_BITS_ALL;
  517                         vm_page_undirty(m);
  518                 } else if (size > toff) {
  519                         /*
  520                          * Read operation filled a partial page.
  521                          */
  522                         m->valid = 0;
  523                         vm_page_set_validclean(m, 0, size - toff);
  524                         /* handled by vm_fault now        */
  525                         /* vm_page_zero_invalid(m, TRUE); */
  526                 } else {
  527                         /*
  528                          * Read operation was short.  If no error occured
  529                          * we may have hit a zero-fill section.   We simply
  530                          * leave valid set to 0.
  531                          */
  532                         ;
  533                 }
  534                 
  535                 if (i != reqpage) {
  536                         /*
  537                          * Whether or not to leave the page activated is up in
  538                          * the air, but we should put the page on a page queue
  539                          * somewhere (it already is in the object).  Result:
  540                          * It appears that emperical results show that
  541                          * deactivating pages is best.
  542                          */
  543 
  544                         /*
  545                          * Just in case someone was asking for this page we
  546                          * now tell them that it is ok to use.
  547                          */
  548                         if (!error) {
  549                                 if (m->flags & PG_WANTED)
  550                                         vm_page_activate(m);
  551                                 else
  552                                         vm_page_deactivate(m);
  553                                 vm_page_wakeup(m);
  554                         } else {
  555                                 vm_page_free(m);
  556                         }
  557                 }
  558         }
  559         vm_page_unlock_queues();
  560         return 0;
  561 #endif /* SMBFS_RWGENERIC */
  562 }
  563 
  564 /*
  565  * Vnode op for VM putpages.
  566  * possible bug: all IO done in sync mode
  567  * Note that vop_close always invalidate pages before close, so it's
  568  * not necessary to open vnode.
  569  */
  570 int
  571 smbfs_putpages(ap)
  572         struct vop_putpages_args /* {
  573                 struct vnode *a_vp;
  574                 vm_page_t *a_m;
  575                 int a_count;
  576                 int a_sync;
  577                 int *a_rtvals;
  578                 vm_ooffset_t a_offset;
  579         } */ *ap;
  580 {
  581         int error;
  582         struct vnode *vp = ap->a_vp;
  583         struct thread *td;
  584         struct ucred *cred;
  585 
  586 #ifdef SMBFS_RWGENERIC
  587         td = curthread;                 /* XXX */
  588         cred = td->td_ucred;            /* XXX */
  589         VOP_OPEN(vp, FWRITE, cred, td);
  590         error = vop_stdputpages(ap);
  591         VOP_CLOSE(vp, FWRITE, cred, td);
  592         return error;
  593 #else
  594         struct uio uio;
  595         struct iovec iov;
  596         vm_offset_t kva;
  597         struct buf *bp;
  598         int i, npages, count;
  599         int *rtvals;
  600         struct smbmount *smp;
  601         struct smbnode *np;
  602         struct smb_cred scred;
  603         vm_page_t *pages;
  604 
  605         td = curthread;                 /* XXX */
  606         cred = td->td_ucred;            /* XXX */
  607 /*      VOP_OPEN(vp, FWRITE, cred, td);*/
  608         np = VTOSMB(vp);
  609         smp = VFSTOSMBFS(vp->v_mount);
  610         pages = ap->a_m;
  611         count = ap->a_count;
  612         rtvals = ap->a_rtvals;
  613         npages = btoc(count);
  614 
  615         for (i = 0; i < npages; i++) {
  616                 rtvals[i] = VM_PAGER_AGAIN;
  617         }
  618 
  619         bp = getpbuf(&smbfs_pbuf_freecnt);
  620 
  621         kva = (vm_offset_t) bp->b_data;
  622         pmap_qenter(kva, pages, npages);
  623         cnt.v_vnodeout++;
  624         cnt.v_vnodepgsout += count;
  625 
  626         iov.iov_base = (caddr_t) kva;
  627         iov.iov_len = count;
  628         uio.uio_iov = &iov;
  629         uio.uio_iovcnt = 1;
  630         uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
  631         uio.uio_resid = count;
  632         uio.uio_segflg = UIO_SYSSPACE;
  633         uio.uio_rw = UIO_WRITE;
  634         uio.uio_td = td;
  635         SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
  636 
  637         smb_makescred(&scred, td, cred);
  638         error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
  639 /*      VOP_CLOSE(vp, FWRITE, cred, td);*/
  640         SMBVDEBUG("paged write done: %d\n", error);
  641 
  642         pmap_qremove(kva, npages);
  643 
  644         relpbuf(bp, &smbfs_pbuf_freecnt);
  645 
  646         if (!error) {
  647                 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
  648                 vm_page_lock_queues();
  649                 for (i = 0; i < nwritten; i++) {
  650                         rtvals[i] = VM_PAGER_OK;
  651                         vm_page_undirty(pages[i]);
  652                 }
  653                 vm_page_unlock_queues();
  654         }
  655         return rtvals[0];
  656 #endif /* SMBFS_RWGENERIC */
  657 }
  658 
  659 /*
  660  * Flush and invalidate all dirty buffers. If another process is already
  661  * doing the flush, just wait for completion.
  662  */
  663 int
  664 smbfs_vinvalbuf(vp, flags, cred, td, intrflg)
  665         struct vnode *vp;
  666         int flags;
  667         struct ucred *cred;
  668         struct thread *td;
  669         int intrflg;
  670 {
  671         struct smbnode *np = VTOSMB(vp);
  672         int error = 0, slpflag, slptimeo;
  673 
  674         VI_LOCK(vp);
  675         if (vp->v_iflag & VI_XLOCK) {
  676                 VI_UNLOCK(vp);
  677                 return 0;
  678         }
  679         VI_UNLOCK(vp);
  680 
  681         if (intrflg) {
  682                 slpflag = PCATCH;
  683                 slptimeo = 2 * hz;
  684         } else {
  685                 slpflag = 0;
  686                 slptimeo = 0;
  687         }
  688         while (np->n_flag & NFLUSHINPROG) {
  689                 np->n_flag |= NFLUSHWANT;
  690                 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo);
  691                 error = smb_proc_intr(td->td_proc);
  692                 if (error == EINTR && intrflg)
  693                         return EINTR;
  694         }
  695         np->n_flag |= NFLUSHINPROG;
  696         error = vinvalbuf(vp, flags, cred, td, slpflag, 0);
  697         while (error) {
  698                 if (intrflg && (error == ERESTART || error == EINTR)) {
  699                         np->n_flag &= ~NFLUSHINPROG;
  700                         if (np->n_flag & NFLUSHWANT) {
  701                                 np->n_flag &= ~NFLUSHWANT;
  702                                 wakeup((caddr_t)&np->n_flag);
  703                         }
  704                         return EINTR;
  705                 }
  706                 error = vinvalbuf(vp, flags, cred, td, slpflag, 0);
  707         }
  708         np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
  709         if (np->n_flag & NFLUSHWANT) {
  710                 np->n_flag &= ~NFLUSHWANT;
  711                 wakeup((caddr_t)&np->n_flag);
  712         }
  713         return (error);
  714 }

Cache object: 8ef2cb13268177f6b28d2df981f6f913


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.