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-rw-r--r--sys/fs/smbfs/smbfs_io.c672
1 files changed, 672 insertions, 0 deletions
diff --git a/sys/fs/smbfs/smbfs_io.c b/sys/fs/smbfs/smbfs_io.c
new file mode 100644
index 0000000..b275d74
--- /dev/null
+++ b/sys/fs/smbfs/smbfs_io.c
@@ -0,0 +1,672 @@
+/*
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Boris Popov.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ *
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
+#include <sys/kernel.h>
+#include <sys/proc.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 <vm/vm.h>
+#if __FreeBSD_version < 400000
+#include <vm/vm_prot.h>
+#endif
+#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;
+
+extern struct linker_set sysctl_vfs_smbfs;
+
+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_procp, 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 ? 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((caddr_t)&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((caddr_t)&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 proc *p;
+ struct vattr vattr;
+ struct smb_cred scred;
+ int error, lks;
+
+ 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;*/
+ p = uiop->uio_procp;
+ if (vp->v_type == VDIR) {
+ lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, p);*/
+ if (lks == LK_SHARED)
+ vn_lock(vp, LK_UPGRADE | LK_RETRY, p);
+ error = smbfs_readvdir(vp, uiop, cred);
+ if (lks == LK_SHARED)
+ vn_lock(vp, LK_DOWNGRADE | LK_RETRY, p);
+ return error;
+ }
+
+/* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
+ if (np->n_flag & NMODIFIED) {
+ smbfs_attr_cacheremove(vp);
+ error = VOP_GETATTR(vp, &vattr, cred, p);
+ if (error)
+ return error;
+ np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
+ } else {
+ error = VOP_GETATTR(vp, &vattr, cred, p);
+ if (error)
+ return error;
+ if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
+ error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
+ if (error)
+ return error;
+ np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
+ }
+ }
+ smb_makescred(&scred, p, 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 proc *p;
+ 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);*/
+ p = uiop->uio_procp;
+ if (ioflag & (IO_APPEND | IO_SYNC)) {
+ if (np->n_flag & NMODIFIED) {
+ smbfs_attr_cacheremove(vp);
+ error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
+ if (error)
+ return error;
+ }
+ if (ioflag & IO_APPEND) {
+#if notyet
+ /*
+ * File size can be changed by another client
+ */
+ smbfs_attr_cacheremove(vp);
+ error = VOP_GETATTR(vp, &vattr, cred, p);
+ if (error) return (error);
+#endif
+ uiop->uio_offset = np->n_size;
+ }
+ }
+ if (uiop->uio_resid == 0)
+ return 0;
+ if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
+ psignal(p, SIGXFSZ);
+ return EFBIG;
+ }
+ smb_makescred(&scred, p, 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 buf *bp, struct ucred *cr, struct proc *p)
+{
+ struct vnode *vp = bp->b_vp;
+ 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_procp = p;
+
+ smb_makescred(&scred, p, 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;
+ bp->b_flags |= B_WRITEINPROG;
+ error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
+ bp->b_flags &= ~B_WRITEINPROG;
+
+ /*
+ * 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 vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
+ ap->a_reqpage);
+#else
+ int i, error, nextoff, size, toff, npages, count;
+ struct uio uio;
+ struct iovec iov;
+ vm_offset_t kva;
+ struct buf *bp;
+ struct vnode *vp;
+ struct proc *p;
+ struct ucred *cred;
+ struct smbmount *smp;
+ struct smbnode *np;
+ struct smb_cred scred;
+ vm_page_t *pages;
+
+ vp = ap->a_vp;
+ p = curproc; /* XXX */
+ cred = curproc->p_ucred; /* XXX */
+ np = VTOSMB(vp);
+ smp = VFSTOSMBFS(vp->v_mount);
+ pages = ap->a_m;
+ count = ap->a_count;
+
+ if (vp->v_object == NULL) {
+ printf("smbfs_getpages: called with non-merged cache vnode??\n");
+ return VM_PAGER_ERROR;
+ }
+ smb_makescred(&scred, p, cred);
+
+#if __FreeBSD_version >= 400000
+ bp = getpbuf(&smbfs_pbuf_freecnt);
+#else
+ bp = getpbuf();
+#endif
+ npages = btoc(count);
+ kva = (vm_offset_t) bp->b_data;
+ pmap_qenter(kva, pages, 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_procp = p;
+
+ error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
+ pmap_qremove(kva, npages);
+
+#if __FreeBSD_version >= 400000
+ relpbuf(bp, &smbfs_pbuf_freecnt);
+#else
+ relpbuf(bp);
+#endif
+
+ if (error && (uio.uio_resid == count)) {
+ printf("smbfs_getpages: error %d\n",error);
+ for (i = 0; i < npages; i++) {
+ if (ap->a_reqpage != i)
+ vnode_pager_freepage(pages[i]);
+ }
+ 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];
+
+ m->flags &= ~PG_ZERO;
+
+ if (nextoff <= size) {
+ m->valid = VM_PAGE_BITS_ALL;
+ m->dirty = 0;
+ } else {
+ int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
+ vm_page_set_validclean(m, 0, nvalid);
+ }
+
+ if (i != ap->a_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->flags & PG_WANTED)
+ vm_page_activate(m);
+ else
+ vm_page_deactivate(m);
+ vm_page_wakeup(m);
+ } else {
+ vnode_pager_freepage(m);
+ }
+ }
+ }
+ 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 proc *p;
+ struct ucred *cred;
+
+#ifdef SMBFS_RWGENERIC
+ p = curproc; /* XXX */
+ cred = p->p_ucred; /* XXX */
+ VOP_OPEN(vp, FWRITE, cred, p);
+ error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
+ ap->a_sync, ap->a_rtvals);
+ VOP_CLOSE(vp, FWRITE, cred, p);
+ 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;
+
+ p = curproc; /* XXX */
+ cred = p->p_ucred; /* XXX */
+/* VOP_OPEN(vp, FWRITE, cred, p);*/
+ 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_AGAIN;
+ }
+
+#if __FreeBSD_version >= 400000
+ bp = getpbuf(&smbfs_pbuf_freecnt);
+#else
+ bp = getpbuf();
+#endif
+ kva = (vm_offset_t) bp->b_data;
+ pmap_qenter(kva, pages, 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_WRITE;
+ uio.uio_procp = p;
+ SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
+
+ smb_makescred(&scred, p, cred);
+ error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
+/* VOP_CLOSE(vp, FWRITE, cred, p);*/
+ SMBVDEBUG("paged write done: %d\n", error);
+
+ pmap_qremove(kva, npages);
+#if __FreeBSD_version >= 400000
+ relpbuf(bp, &smbfs_pbuf_freecnt);
+#else
+ relpbuf(bp);
+#endif
+
+ if (!error) {
+ int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
+ for (i = 0; i < nwritten; i++) {
+ rtvals[i] = VM_PAGER_OK;
+ pages[i]->dirty = 0;
+ }
+ }
+ 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(vp, flags, cred, p, intrflg)
+ struct vnode *vp;
+ int flags;
+ struct ucred *cred;
+ struct proc *p;
+ int intrflg;
+{
+ struct smbnode *np = VTOSMB(vp);
+ int error = 0, slpflag, slptimeo;
+
+ if (vp->v_flag & VXLOCK)
+ return 0;
+ if (intrflg) {
+ slpflag = PCATCH;
+ slptimeo = 2 * hz;
+ } else {
+ slpflag = 0;
+ slptimeo = 0;
+ }
+ while (np->n_flag & NFLUSHINPROG) {
+ np->n_flag |= NFLUSHWANT;
+ error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo);
+ error = smb_proc_intr(p);
+ if (error == EINTR && intrflg)
+ return EINTR;
+ }
+ np->n_flag |= NFLUSHINPROG;
+ error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
+ while (error) {
+ if (intrflg && (error == ERESTART || error == EINTR)) {
+ np->n_flag &= ~NFLUSHINPROG;
+ if (np->n_flag & NFLUSHWANT) {
+ np->n_flag &= ~NFLUSHWANT;
+ wakeup((caddr_t)&np->n_flag);
+ }
+ return EINTR;
+ }
+ error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
+ }
+ np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
+ if (np->n_flag & NFLUSHWANT) {
+ np->n_flag &= ~NFLUSHWANT;
+ wakeup((caddr_t)&np->n_flag);
+ }
+ return (error);
+}
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