Current Path : /sys/fs/smbfs/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/fs/smbfs/smbfs_io.c |
/*- * Copyright (c) 2000-2001 Boris Popov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: release/9.1.0/sys/fs/smbfs/smbfs_io.c 222586 2011-06-01 21:00:28Z kib $ * */ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/fcntl.h> #include <sys/bio.h> #include <sys/buf.h> #include <sys/mount.h> #include <sys/namei.h> #include <sys/vnode.h> #include <sys/dirent.h> #include <sys/signalvar.h> #include <sys/sysctl.h> #include <sys/vmmeter.h> #include <vm/vm.h> #include <vm/vm_page.h> #include <vm/vm_extern.h> #include <vm/vm_object.h> #include <vm/vm_pager.h> #include <vm/vnode_pager.h> /* #include <sys/ioccom.h> */ #include <netsmb/smb.h> #include <netsmb/smb_conn.h> #include <netsmb/smb_subr.h> #include <fs/smbfs/smbfs.h> #include <fs/smbfs/smbfs_node.h> #include <fs/smbfs/smbfs_subr.h> /*#define SMBFS_RWGENERIC*/ extern int smbfs_pbuf_freecnt; static int smbfs_fastlookup = 1; SYSCTL_DECL(_vfs_smbfs); SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, ""); #define DE_SIZE (sizeof(struct dirent)) static int smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) { struct dirent de; struct componentname cn; struct smb_cred scred; struct smbfs_fctx *ctx; struct vnode *newvp; struct smbnode *np = VTOSMB(vp); int error/*, *eofflag = ap->a_eofflag*/; long offset, limit; np = VTOSMB(vp); SMBVDEBUG("dirname='%s'\n", np->n_name); smb_makescred(&scred, uio->uio_td, cred); offset = uio->uio_offset / DE_SIZE; /* offset in the directory */ limit = uio->uio_resid / DE_SIZE; if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) return EINVAL; while (limit && offset < 2) { limit--; bzero((caddr_t)&de, DE_SIZE); de.d_reclen = DE_SIZE; de.d_fileno = (offset == 0) ? np->n_ino : (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2); if (de.d_fileno == 0) de.d_fileno = 0x7ffffffd + offset; de.d_namlen = offset + 1; de.d_name[0] = '.'; de.d_name[1] = '.'; de.d_name[offset + 1] = '\0'; de.d_type = DT_DIR; error = uiomove(&de, DE_SIZE, uio); if (error) return error; offset++; uio->uio_offset += DE_SIZE; } if (limit == 0) return 0; if (offset != np->n_dirofs || np->n_dirseq == NULL) { SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); if (np->n_dirseq) { smbfs_findclose(np->n_dirseq, &scred); np->n_dirseq = NULL; } np->n_dirofs = 2; error = smbfs_findopen(np, "*", 1, SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, &scred, &ctx); if (error) { SMBVDEBUG("can not open search, error = %d", error); return error; } np->n_dirseq = ctx; } else ctx = np->n_dirseq; while (np->n_dirofs < offset) { error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred); if (error) { smbfs_findclose(np->n_dirseq, &scred); np->n_dirseq = NULL; return error == ENOENT ? 0 : error; } } error = 0; for (; limit; limit--, offset++) { error = smbfs_findnext(ctx, limit, &scred); if (error) break; np->n_dirofs++; bzero((caddr_t)&de, DE_SIZE); de.d_reclen = DE_SIZE; de.d_fileno = ctx->f_attr.fa_ino; de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG; de.d_namlen = ctx->f_nmlen; bcopy(ctx->f_name, de.d_name, de.d_namlen); de.d_name[de.d_namlen] = '\0'; if (smbfs_fastlookup) { error = smbfs_nget(vp->v_mount, vp, ctx->f_name, ctx->f_nmlen, &ctx->f_attr, &newvp); if (!error) { cn.cn_nameptr = de.d_name; cn.cn_namelen = de.d_namlen; cache_enter(vp, newvp, &cn); vput(newvp); } } error = uiomove(&de, DE_SIZE, uio); if (error) break; } if (error == ENOENT) error = 0; uio->uio_offset = offset * DE_SIZE; return error; } int smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) { struct smbmount *smp = VFSTOSMBFS(vp->v_mount); struct smbnode *np = VTOSMB(vp); struct thread *td; struct vattr vattr; struct smb_cred scred; int error, lks; /* * Protect against method which is not supported for now */ if (uiop->uio_segflg == UIO_NOCOPY) return EOPNOTSUPP; if (vp->v_type != VREG && vp->v_type != VDIR) { SMBFSERR("vn types other than VREG or VDIR are unsupported !\n"); return EIO; } if (uiop->uio_resid == 0) return 0; if (uiop->uio_offset < 0) return EINVAL; /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) return EFBIG;*/ td = uiop->uio_td; if (vp->v_type == VDIR) { lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */ if (lks == LK_SHARED) vn_lock(vp, LK_UPGRADE | LK_RETRY); error = smbfs_readvdir(vp, uiop, cred); if (lks == LK_SHARED) vn_lock(vp, LK_DOWNGRADE | LK_RETRY); return error; } /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/ if (np->n_flag & NMODIFIED) { smbfs_attr_cacheremove(vp); error = VOP_GETATTR(vp, &vattr, cred); if (error) return error; np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; } else { error = VOP_GETATTR(vp, &vattr, cred); if (error) return error; if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) { error = smbfs_vinvalbuf(vp, td); if (error) return error; np->n_mtime.tv_sec = vattr.va_mtime.tv_sec; } } smb_makescred(&scred, td, cred); return smb_read(smp->sm_share, np->n_fid, uiop, &scred); } int smbfs_writevnode(struct vnode *vp, struct uio *uiop, struct ucred *cred, int ioflag) { struct smbmount *smp = VTOSMBFS(vp); struct smbnode *np = VTOSMB(vp); struct smb_cred scred; struct thread *td; int error = 0; if (vp->v_type != VREG) { SMBERROR("vn types other than VREG unsupported !\n"); return EIO; } SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); if (uiop->uio_offset < 0) return EINVAL; /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize) return (EFBIG);*/ td = uiop->uio_td; if (ioflag & (IO_APPEND | IO_SYNC)) { if (np->n_flag & NMODIFIED) { smbfs_attr_cacheremove(vp); error = smbfs_vinvalbuf(vp, td); if (error) return error; } if (ioflag & IO_APPEND) { #ifdef notyet /* * File size can be changed by another client */ smbfs_attr_cacheremove(vp); error = VOP_GETATTR(vp, &vattr, cred); if (error) return (error); #endif uiop->uio_offset = np->n_size; } } if (uiop->uio_resid == 0) return 0; if (vn_rlimit_fsize(vp, uiop, td)) return (EFBIG); smb_makescred(&scred, td, cred); error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid); if (!error) { if (uiop->uio_offset > np->n_size) { np->n_size = uiop->uio_offset; vnode_pager_setsize(vp, np->n_size); } } return error; } /* * Do an I/O operation to/from a cache block. */ int smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td) { struct smbmount *smp = VFSTOSMBFS(vp->v_mount); struct smbnode *np = VTOSMB(vp); struct uio uio, *uiop = &uio; struct iovec io; struct smb_cred scred; int error = 0; uiop->uio_iov = &io; uiop->uio_iovcnt = 1; uiop->uio_segflg = UIO_SYSSPACE; uiop->uio_td = td; smb_makescred(&scred, td, cr); if (bp->b_iocmd == BIO_READ) { io.iov_len = uiop->uio_resid = bp->b_bcount; io.iov_base = bp->b_data; uiop->uio_rw = UIO_READ; switch (vp->v_type) { case VREG: uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE; error = smb_read(smp->sm_share, np->n_fid, uiop, &scred); if (error) break; if (uiop->uio_resid) { int left = uiop->uio_resid; int nread = bp->b_bcount - left; if (left > 0) bzero((char *)bp->b_data + nread, left); } break; default: printf("smbfs_doio: type %x unexpected\n",vp->v_type); break; }; if (error) { bp->b_error = error; bp->b_ioflags |= BIO_ERROR; } } else { /* write */ if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size) bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE); if (bp->b_dirtyend > bp->b_dirtyoff) { io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff; uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; io.iov_base = (char *)bp->b_data + bp->b_dirtyoff; uiop->uio_rw = UIO_WRITE; error = smb_write(smp->sm_share, np->n_fid, uiop, &scred); /* * For an interrupted write, the buffer is still valid * and the write hasn't been pushed to the server yet, * so we can't set BIO_ERROR and report the interruption * by setting B_EINTR. For the B_ASYNC case, B_EINTR * is not relevant, so the rpc attempt is essentially * a noop. For the case of a V3 write rpc not being * committed to stable storage, the block is still * dirty and requires either a commit rpc or another * write rpc with iomode == NFSV3WRITE_FILESYNC before * the block is reused. This is indicated by setting * the B_DELWRI and B_NEEDCOMMIT flags. */ if (error == EINTR || (!error && (bp->b_flags & B_NEEDCOMMIT))) { int s; s = splbio(); bp->b_flags &= ~(B_INVAL|B_NOCACHE); if ((bp->b_flags & B_ASYNC) == 0) bp->b_flags |= B_EINTR; if ((bp->b_flags & B_PAGING) == 0) { bdirty(bp); bp->b_flags &= ~B_DONE; } if ((bp->b_flags & B_ASYNC) == 0) bp->b_flags |= B_EINTR; splx(s); } else { if (error) { bp->b_ioflags |= BIO_ERROR; bp->b_error = error; } bp->b_dirtyoff = bp->b_dirtyend = 0; } } else { bp->b_resid = 0; bufdone(bp); return 0; } } bp->b_resid = uiop->uio_resid; bufdone(bp); return error; } /* * Vnode op for VM getpages. * Wish wish .... get rid from multiple IO routines */ int smbfs_getpages(ap) struct vop_getpages_args /* { struct vnode *a_vp; vm_page_t *a_m; int a_count; int a_reqpage; vm_ooffset_t a_offset; } */ *ap; { #ifdef SMBFS_RWGENERIC return vop_stdgetpages(ap); #else int i, error, nextoff, size, toff, npages, count, reqpage; struct uio uio; struct iovec iov; vm_offset_t kva; struct buf *bp; struct vnode *vp; struct thread *td; struct ucred *cred; struct smbmount *smp; struct smbnode *np; struct smb_cred scred; vm_object_t object; vm_page_t *pages, m; vp = ap->a_vp; if ((object = vp->v_object) == NULL) { printf("smbfs_getpages: called with non-merged cache vnode??\n"); return VM_PAGER_ERROR; } td = curthread; /* XXX */ cred = td->td_ucred; /* XXX */ np = VTOSMB(vp); smp = VFSTOSMBFS(vp->v_mount); pages = ap->a_m; count = ap->a_count; npages = btoc(count); reqpage = ap->a_reqpage; /* * If the requested page is partially valid, just return it and * allow the pager to zero-out the blanks. Partially valid pages * can only occur at the file EOF. */ m = pages[reqpage]; VM_OBJECT_LOCK(object); if (m->valid != 0) { for (i = 0; i < npages; ++i) { if (i != reqpage) { vm_page_lock(pages[i]); vm_page_free(pages[i]); vm_page_unlock(pages[i]); } } VM_OBJECT_UNLOCK(object); return 0; } VM_OBJECT_UNLOCK(object); smb_makescred(&scred, td, cred); bp = getpbuf(&smbfs_pbuf_freecnt); kva = (vm_offset_t) bp->b_data; pmap_qenter(kva, pages, npages); PCPU_INC(cnt.v_vnodein); PCPU_ADD(cnt.v_vnodepgsin, npages); iov.iov_base = (caddr_t) kva; iov.iov_len = count; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); uio.uio_resid = count; uio.uio_segflg = UIO_SYSSPACE; uio.uio_rw = UIO_READ; uio.uio_td = td; error = smb_read(smp->sm_share, np->n_fid, &uio, &scred); pmap_qremove(kva, npages); relpbuf(bp, &smbfs_pbuf_freecnt); VM_OBJECT_LOCK(object); if (error && (uio.uio_resid == count)) { printf("smbfs_getpages: error %d\n",error); for (i = 0; i < npages; i++) { if (reqpage != i) { vm_page_lock(pages[i]); vm_page_free(pages[i]); vm_page_unlock(pages[i]); } } VM_OBJECT_UNLOCK(object); return VM_PAGER_ERROR; } size = count - uio.uio_resid; for (i = 0, toff = 0; i < npages; i++, toff = nextoff) { vm_page_t m; nextoff = toff + PAGE_SIZE; m = pages[i]; if (nextoff <= size) { /* * Read operation filled an entire page */ m->valid = VM_PAGE_BITS_ALL; KASSERT(m->dirty == 0, ("smbfs_getpages: page %p is dirty", m)); } else if (size > toff) { /* * Read operation filled a partial page. */ m->valid = 0; vm_page_set_valid(m, 0, size - toff); KASSERT(m->dirty == 0, ("smbfs_getpages: page %p is dirty", m)); } else { /* * Read operation was short. If no error occured * we may have hit a zero-fill section. We simply * leave valid set to 0. */ ; } if (i != reqpage) { /* * Whether or not to leave the page activated is up in * the air, but we should put the page on a page queue * somewhere (it already is in the object). Result: * It appears that emperical results show that * deactivating pages is best. */ /* * Just in case someone was asking for this page we * now tell them that it is ok to use. */ if (!error) { if (m->oflags & VPO_WANTED) { vm_page_lock(m); vm_page_activate(m); vm_page_unlock(m); } else { vm_page_lock(m); vm_page_deactivate(m); vm_page_unlock(m); } vm_page_wakeup(m); } else { vm_page_lock(m); vm_page_free(m); vm_page_unlock(m); } } } VM_OBJECT_UNLOCK(object); return 0; #endif /* SMBFS_RWGENERIC */ } /* * Vnode op for VM putpages. * possible bug: all IO done in sync mode * Note that vop_close always invalidate pages before close, so it's * not necessary to open vnode. */ int smbfs_putpages(ap) struct vop_putpages_args /* { struct vnode *a_vp; vm_page_t *a_m; int a_count; int a_sync; int *a_rtvals; vm_ooffset_t a_offset; } */ *ap; { int error; struct vnode *vp = ap->a_vp; struct thread *td; struct ucred *cred; #ifdef SMBFS_RWGENERIC td = curthread; /* XXX */ cred = td->td_ucred; /* XXX */ VOP_OPEN(vp, FWRITE, cred, td, NULL); error = vop_stdputpages(ap); VOP_CLOSE(vp, FWRITE, cred, td); return error; #else struct uio uio; struct iovec iov; vm_offset_t kva; struct buf *bp; int i, npages, count; int *rtvals; struct smbmount *smp; struct smbnode *np; struct smb_cred scred; vm_page_t *pages; td = curthread; /* XXX */ cred = td->td_ucred; /* XXX */ /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/ np = VTOSMB(vp); smp = VFSTOSMBFS(vp->v_mount); pages = ap->a_m; count = ap->a_count; rtvals = ap->a_rtvals; npages = btoc(count); for (i = 0; i < npages; i++) { rtvals[i] = VM_PAGER_ERROR; } bp = getpbuf(&smbfs_pbuf_freecnt); kva = (vm_offset_t) bp->b_data; pmap_qenter(kva, pages, npages); PCPU_INC(cnt.v_vnodeout); PCPU_ADD(cnt.v_vnodepgsout, count); iov.iov_base = (caddr_t) kva; iov.iov_len = count; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_offset = IDX_TO_OFF(pages[0]->pindex); uio.uio_resid = count; uio.uio_segflg = UIO_SYSSPACE; uio.uio_rw = UIO_WRITE; uio.uio_td = td; SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid); smb_makescred(&scred, td, cred); error = smb_write(smp->sm_share, np->n_fid, &uio, &scred); /* VOP_CLOSE(vp, FWRITE, cred, td);*/ SMBVDEBUG("paged write done: %d\n", error); pmap_qremove(kva, npages); relpbuf(bp, &smbfs_pbuf_freecnt); if (!error) vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid); return rtvals[0]; #endif /* SMBFS_RWGENERIC */ } /* * Flush and invalidate all dirty buffers. If another process is already * doing the flush, just wait for completion. */ int smbfs_vinvalbuf(struct vnode *vp, struct thread *td) { struct smbnode *np = VTOSMB(vp); int error = 0; if (vp->v_iflag & VI_DOOMED) return 0; while (np->n_flag & NFLUSHINPROG) { np->n_flag |= NFLUSHWANT; error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz); error = smb_td_intr(td); if (error == EINTR) return EINTR; } np->n_flag |= NFLUSHINPROG; if (vp->v_bufobj.bo_object != NULL) { VM_OBJECT_LOCK(vp->v_bufobj.bo_object); vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC); VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object); } error = vinvalbuf(vp, V_SAVE, PCATCH, 0); while (error) { if (error == ERESTART || error == EINTR) { np->n_flag &= ~NFLUSHINPROG; if (np->n_flag & NFLUSHWANT) { np->n_flag &= ~NFLUSHWANT; wakeup(&np->n_flag); } return EINTR; } error = vinvalbuf(vp, V_SAVE, PCATCH, 0); } np->n_flag &= ~(NMODIFIED | NFLUSHINPROG); if (np->n_flag & NFLUSHWANT) { np->n_flag &= ~NFLUSHWANT; wakeup(&np->n_flag); } return (error); }