mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 09:10:28 +00:00
Various NFS fixes:
Make vfs_bio buffer mgmt work better. Buffers were being used after brelse. Make nfs_getpages work independently of other NFS interfaces. This eliminates some difficult recursion problems and decreases pagefault overhead. Remove an erroneous vfs_unbusy_pages. Fix a reentrancy problem, with nfs_vinvalbuf when vnode is already being rundown. Reassignbuf wasn't being called when needed under certain circumstances. (Thanks to Bill Paul for help.)
This commit is contained in:
parent
8447a0aed7
commit
33b90a70cd
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=32755
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@ -11,7 +11,7 @@
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* 2. Absolutely no warranty of function or purpose is made by the author
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* John S. Dyson.
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*
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* $Id: vfs_bio.c,v 1.144 1998/01/22 17:29:51 dyson Exp $
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* $Id: vfs_bio.c,v 1.145 1998/01/24 02:01:20 dyson Exp $
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*/
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/*
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@ -639,7 +639,11 @@ brelse(struct buf * bp)
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}
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if (bp->b_flags & (B_INVAL | B_RELBUF))
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vfs_vmio_release(bp);
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} else if (bp->b_flags & B_VMIO) {
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if (bp->b_flags && (B_INVAL | B_RELBUF))
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vfs_vmio_release(bp);
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}
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#if !defined(MAX_PERF)
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if (bp->b_qindex != QUEUE_NONE)
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panic("brelse: free buffer onto another queue???");
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)nfs_bio.c 8.9 (Berkeley) 3/30/95
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* $Id: nfs_bio.c,v 1.45 1997/12/08 00:59:08 dyson Exp $
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* $Id: nfs_bio.c,v 1.46 1998/01/06 05:21:38 dyson Exp $
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*/
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@ -76,49 +76,41 @@ int
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nfs_getpages(ap)
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struct vop_getpages_args *ap;
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{
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int i, bsize;
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vm_object_t obj;
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int pcount;
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struct uio auio;
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struct iovec aiov;
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int error;
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int i, pcount, error;
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struct uio uio;
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struct iovec iov;
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vm_page_t m;
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vm_offset_t kva;
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if ((ap->a_vp->v_object) == NULL) {
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printf("nfs_getpages: called with non-merged cache vnode??\n");
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return EOPNOTSUPP;
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}
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m = ap->a_m[ap->a_reqpage];
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kva = vm_pager_map_page(m);
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iov.iov_base = (caddr_t) kva;
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iov.iov_len = PAGE_SIZE;
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uio.uio_iov = &iov;
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uio.uio_iovcnt = 1;
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uio.uio_offset = IDX_TO_OFF(m->pindex);
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uio.uio_resid = PAGE_SIZE;
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uio.uio_segflg = UIO_SYSSPACE;
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uio.uio_rw = UIO_READ;
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uio.uio_procp = curproc;
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error = nfs_readrpc(ap->a_vp, &uio, curproc->p_ucred);
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vm_pager_unmap_page(kva);
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pcount = round_page(ap->a_count) / PAGE_SIZE;
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obj = ap->a_m[ap->a_reqpage]->object;
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bsize = ap->a_vp->v_mount->mnt_stat.f_iosize;
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for (i = 0; i < pcount; i++) {
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if (i != ap->a_reqpage) {
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vnode_pager_freepage(ap->a_m[i]);
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}
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}
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m = ap->a_m[ap->a_reqpage];
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m->busy++;
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m->flags &= ~PG_BUSY;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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aiov.iov_base = 0;
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aiov.iov_len = PAGE_SIZE;
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auio.uio_resid = PAGE_SIZE;
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auio.uio_offset = IDX_TO_OFF(m->pindex);
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auio.uio_segflg = UIO_NOCOPY;
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auio.uio_rw = UIO_READ;
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auio.uio_procp = curproc;
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error = nfs_bioread(ap->a_vp, &auio, IO_NODELOCKED, curproc->p_ucred, 1);
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m->flags |= PG_BUSY;
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m->busy--;
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if (error && (auio.uio_resid == PAGE_SIZE))
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if (error && (uio.uio_resid == PAGE_SIZE))
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return VM_PAGER_ERROR;
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return 0;
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}
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@ -315,15 +307,15 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
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goto again;
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}
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if ((bp->b_flags & B_CACHE) == 0) {
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bp->b_flags |= B_READ;
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bp->b_flags &= ~(B_DONE | B_ERROR | B_INVAL);
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not_readin = 0;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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brelse(bp);
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return (error);
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}
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bp->b_flags |= B_READ;
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bp->b_flags &= ~(B_DONE | B_ERROR | B_INVAL);
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not_readin = 0;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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brelse(bp);
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return (error);
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}
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}
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if (bufsize > on) {
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n = min((unsigned)(bufsize - on), uio->uio_resid);
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@ -358,14 +350,14 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
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if (!bp)
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return (EINTR);
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if ((bp->b_flags & B_CACHE) == 0) {
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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bp->b_flags |= B_ERROR;
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brelse(bp);
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return (error);
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}
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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bp->b_flags |= B_ERROR;
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brelse(bp);
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return (error);
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}
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}
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n = min(uio->uio_resid, NFS_MAXPATHLEN - bp->b_resid);
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on = 0;
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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vfs_unbusy_pages(bp);
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brelse(bp);
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while (error == NFSERR_BAD_COOKIE) {
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nfs_invaldir(vp);
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error = nfs_vinvalbuf(vp, 0, cred, p, 1);
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/*
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* Yuck! The directory has been modified on the
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* server. The only way to get the block is by
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* reading from the beginning to get all the
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* offset cookies.
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*/
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for (i = 0; i <= lbn && !error; i++) {
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if (np->n_direofoffset
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&& (i * NFS_DIRBLKSIZ) >= np->n_direofoffset)
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while (error == NFSERR_BAD_COOKIE) {
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nfs_invaldir(vp);
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error = nfs_vinvalbuf(vp, 0, cred, p, 1);
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/*
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* Yuck! The directory has been modified on the
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* server. The only way to get the block is by
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* reading from the beginning to get all the
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* offset cookies.
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*/
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for (i = 0; i <= lbn && !error; i++) {
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if (np->n_direofoffset
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&& (i * NFS_DIRBLKSIZ) >= np->n_direofoffset)
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return (0);
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bp = nfs_getcacheblk(vp, i, NFS_DIRBLKSIZ, p);
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if (!bp)
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return (EINTR);
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if ((bp->b_flags & B_DONE) == 0) {
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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vfs_unbusy_pages(bp);
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brelse(bp);
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} else if (i < lbn)
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brelse(bp);
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bp = nfs_getcacheblk(vp, i, NFS_DIRBLKSIZ, p);
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if (!bp)
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return (EINTR);
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if ((bp->b_flags & B_DONE) == 0) {
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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brelse(bp);
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} else if (i < lbn) {
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brelse(bp);
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}
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}
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}
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default:
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printf(" nfs_bioread: type %x unexpected\n",vp->v_type);
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}
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brelse(bp);
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brelse(bp);
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} while (error == 0 && uio->uio_resid > 0 && n > 0);
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return (error);
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}
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@ -709,8 +697,11 @@ nfs_getcacheblk(vp, bn, size, p)
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struct proc *p;
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{
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register struct buf *bp;
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struct nfsmount *nmp = VFSTONFS(vp->v_mount);
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int biosize = vp->v_mount->mnt_stat.f_iosize;
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struct mount *mp;
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struct nfsmount *nmp;
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mp = vp->v_mount;
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nmp = VFSTONFS(mp);
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if (nmp->nm_flag & NFSMNT_INT) {
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bp = getblk(vp, bn, size, PCATCH, 0);
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} else
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bp = getblk(vp, bn, size, 0, 0);
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if( vp->v_type == VREG)
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if( vp->v_type == VREG) {
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int biosize;
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biosize = mp->mnt_stat.f_iosize;
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bp->b_blkno = (bn * biosize) / DEV_BSIZE;
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}
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return (bp);
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}
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struct nfsmount *nmp = VFSTONFS(vp->v_mount);
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int error = 0, slpflag, slptimeo;
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if (vp->v_flag & VXLOCK) {
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return (0);
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}
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if ((nmp->nm_flag & NFSMNT_INT) == 0)
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intrflg = 0;
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if (intrflg) {
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bp->b_flags &= ~(B_INVAL|B_NOCACHE);
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++numdirtybuffers;
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bp->b_flags |= B_DELWRI;
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/*
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* Since for the B_ASYNC case, nfs_bwrite() has reassigned the
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* buffer to the clean list, we have to reassign it back to the
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* dirty one. Ugh.
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*/
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if (bp->b_flags & B_ASYNC)
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reassignbuf(bp, vp);
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else
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bp->b_flags |= B_EINTR;
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reassignbuf(bp, vp);
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if ((bp->b_flags & B_ASYNC) == 0)
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bp->b_flags |= B_EINTR;
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} else {
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if (error) {
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bp->b_flags |= B_ERROR;
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)nfs_bio.c 8.9 (Berkeley) 3/30/95
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* $Id: nfs_bio.c,v 1.45 1997/12/08 00:59:08 dyson Exp $
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* $Id: nfs_bio.c,v 1.46 1998/01/06 05:21:38 dyson Exp $
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*/
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nfs_getpages(ap)
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struct vop_getpages_args *ap;
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{
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int i, bsize;
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vm_object_t obj;
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int pcount;
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struct uio auio;
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struct iovec aiov;
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int error;
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int i, pcount, error;
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struct uio uio;
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struct iovec iov;
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vm_page_t m;
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vm_offset_t kva;
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if ((ap->a_vp->v_object) == NULL) {
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printf("nfs_getpages: called with non-merged cache vnode??\n");
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return EOPNOTSUPP;
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}
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m = ap->a_m[ap->a_reqpage];
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kva = vm_pager_map_page(m);
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iov.iov_base = (caddr_t) kva;
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iov.iov_len = PAGE_SIZE;
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uio.uio_iov = &iov;
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uio.uio_iovcnt = 1;
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uio.uio_offset = IDX_TO_OFF(m->pindex);
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uio.uio_resid = PAGE_SIZE;
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uio.uio_segflg = UIO_SYSSPACE;
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uio.uio_rw = UIO_READ;
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uio.uio_procp = curproc;
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error = nfs_readrpc(ap->a_vp, &uio, curproc->p_ucred);
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vm_pager_unmap_page(kva);
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pcount = round_page(ap->a_count) / PAGE_SIZE;
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obj = ap->a_m[ap->a_reqpage]->object;
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bsize = ap->a_vp->v_mount->mnt_stat.f_iosize;
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for (i = 0; i < pcount; i++) {
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if (i != ap->a_reqpage) {
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vnode_pager_freepage(ap->a_m[i]);
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}
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}
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m = ap->a_m[ap->a_reqpage];
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m->busy++;
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m->flags &= ~PG_BUSY;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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aiov.iov_base = 0;
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aiov.iov_len = PAGE_SIZE;
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auio.uio_resid = PAGE_SIZE;
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auio.uio_offset = IDX_TO_OFF(m->pindex);
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auio.uio_segflg = UIO_NOCOPY;
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auio.uio_rw = UIO_READ;
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auio.uio_procp = curproc;
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error = nfs_bioread(ap->a_vp, &auio, IO_NODELOCKED, curproc->p_ucred, 1);
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m->flags |= PG_BUSY;
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m->busy--;
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if (error && (auio.uio_resid == PAGE_SIZE))
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if (error && (uio.uio_resid == PAGE_SIZE))
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return VM_PAGER_ERROR;
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return 0;
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}
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@ -315,15 +307,15 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
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goto again;
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}
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if ((bp->b_flags & B_CACHE) == 0) {
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bp->b_flags |= B_READ;
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bp->b_flags &= ~(B_DONE | B_ERROR | B_INVAL);
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not_readin = 0;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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brelse(bp);
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return (error);
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}
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bp->b_flags |= B_READ;
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bp->b_flags &= ~(B_DONE | B_ERROR | B_INVAL);
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not_readin = 0;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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brelse(bp);
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return (error);
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}
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}
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if (bufsize > on) {
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n = min((unsigned)(bufsize - on), uio->uio_resid);
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@ -358,14 +350,14 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
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if (!bp)
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return (EINTR);
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if ((bp->b_flags & B_CACHE) == 0) {
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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bp->b_flags |= B_ERROR;
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brelse(bp);
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return (error);
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}
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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bp->b_flags |= B_ERROR;
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brelse(bp);
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return (error);
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}
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}
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n = min(uio->uio_resid, NFS_MAXPATHLEN - bp->b_resid);
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on = 0;
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@ -385,34 +377,30 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
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bp->b_flags |= B_READ;
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vfs_busy_pages(bp, 0);
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error = nfs_doio(bp, cred, p);
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if (error) {
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vfs_unbusy_pages(bp);
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brelse(bp);
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while (error == NFSERR_BAD_COOKIE) {
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nfs_invaldir(vp);
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error = nfs_vinvalbuf(vp, 0, cred, p, 1);
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/*
|
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* Yuck! The directory has been modified on the
|
||||
* server. The only way to get the block is by
|
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* reading from the beginning to get all the
|
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* offset cookies.
|
||||
*/
|
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for (i = 0; i <= lbn && !error; i++) {
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if (np->n_direofoffset
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&& (i * NFS_DIRBLKSIZ) >= np->n_direofoffset)
|
||||
while (error == NFSERR_BAD_COOKIE) {
|
||||
nfs_invaldir(vp);
|
||||
error = nfs_vinvalbuf(vp, 0, cred, p, 1);
|
||||
/*
|
||||
* Yuck! The directory has been modified on the
|
||||
* server. The only way to get the block is by
|
||||
* reading from the beginning to get all the
|
||||
* offset cookies.
|
||||
*/
|
||||
for (i = 0; i <= lbn && !error; i++) {
|
||||
if (np->n_direofoffset
|
||||
&& (i * NFS_DIRBLKSIZ) >= np->n_direofoffset)
|
||||
return (0);
|
||||
bp = nfs_getcacheblk(vp, i, NFS_DIRBLKSIZ, p);
|
||||
if (!bp)
|
||||
return (EINTR);
|
||||
if ((bp->b_flags & B_DONE) == 0) {
|
||||
bp->b_flags |= B_READ;
|
||||
vfs_busy_pages(bp, 0);
|
||||
error = nfs_doio(bp, cred, p);
|
||||
if (error) {
|
||||
vfs_unbusy_pages(bp);
|
||||
brelse(bp);
|
||||
} else if (i < lbn)
|
||||
brelse(bp);
|
||||
bp = nfs_getcacheblk(vp, i, NFS_DIRBLKSIZ, p);
|
||||
if (!bp)
|
||||
return (EINTR);
|
||||
if ((bp->b_flags & B_DONE) == 0) {
|
||||
bp->b_flags |= B_READ;
|
||||
vfs_busy_pages(bp, 0);
|
||||
error = nfs_doio(bp, cred, p);
|
||||
if (error) {
|
||||
brelse(bp);
|
||||
} else if (i < lbn) {
|
||||
brelse(bp);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -473,7 +461,7 @@ nfs_bioread(vp, uio, ioflag, cred, getpages)
|
|||
default:
|
||||
printf(" nfs_bioread: type %x unexpected\n",vp->v_type);
|
||||
}
|
||||
brelse(bp);
|
||||
brelse(bp);
|
||||
} while (error == 0 && uio->uio_resid > 0 && n > 0);
|
||||
return (error);
|
||||
}
|
||||
|
@ -709,8 +697,11 @@ nfs_getcacheblk(vp, bn, size, p)
|
|||
struct proc *p;
|
||||
{
|
||||
register struct buf *bp;
|
||||
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
||||
int biosize = vp->v_mount->mnt_stat.f_iosize;
|
||||
struct mount *mp;
|
||||
struct nfsmount *nmp;
|
||||
|
||||
mp = vp->v_mount;
|
||||
nmp = VFSTONFS(mp);
|
||||
|
||||
if (nmp->nm_flag & NFSMNT_INT) {
|
||||
bp = getblk(vp, bn, size, PCATCH, 0);
|
||||
|
@ -722,8 +713,11 @@ nfs_getcacheblk(vp, bn, size, p)
|
|||
} else
|
||||
bp = getblk(vp, bn, size, 0, 0);
|
||||
|
||||
if( vp->v_type == VREG)
|
||||
if( vp->v_type == VREG) {
|
||||
int biosize;
|
||||
biosize = mp->mnt_stat.f_iosize;
|
||||
bp->b_blkno = (bn * biosize) / DEV_BSIZE;
|
||||
}
|
||||
|
||||
return (bp);
|
||||
}
|
||||
|
@ -744,6 +738,10 @@ nfs_vinvalbuf(vp, flags, cred, p, intrflg)
|
|||
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
||||
int error = 0, slpflag, slptimeo;
|
||||
|
||||
if (vp->v_flag & VXLOCK) {
|
||||
return (0);
|
||||
}
|
||||
|
||||
if ((nmp->nm_flag & NFSMNT_INT) == 0)
|
||||
intrflg = 0;
|
||||
if (intrflg) {
|
||||
|
@ -1070,16 +1068,9 @@ nfs_doio(bp, cr, p)
|
|||
bp->b_flags &= ~(B_INVAL|B_NOCACHE);
|
||||
++numdirtybuffers;
|
||||
bp->b_flags |= B_DELWRI;
|
||||
|
||||
/*
|
||||
* Since for the B_ASYNC case, nfs_bwrite() has reassigned the
|
||||
* buffer to the clean list, we have to reassign it back to the
|
||||
* dirty one. Ugh.
|
||||
*/
|
||||
if (bp->b_flags & B_ASYNC)
|
||||
reassignbuf(bp, vp);
|
||||
else
|
||||
bp->b_flags |= B_EINTR;
|
||||
reassignbuf(bp, vp);
|
||||
if ((bp->b_flags & B_ASYNC) == 0)
|
||||
bp->b_flags |= B_EINTR;
|
||||
} else {
|
||||
if (error) {
|
||||
bp->b_flags |= B_ERROR;
|
||||
|
|
Loading…
Reference in a new issue