Date: Fri, 29 Mar 2013 13:17:34 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r248879 - in stable/9/sys: kern sys Message-ID: <201303291317.r2TDHYCY094897@svn.freebsd.org>
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Author: kib Date: Fri Mar 29 13:17:34 2013 New Revision: 248879 URL: http://svnweb.freebsd.org/changeset/base/248879 Log: MFC r248319: Merge vn_io_fault_pgmove(). Modified: stable/9/sys/kern/vfs_vnops.c stable/9/sys/sys/vnode.h Directory Properties: stable/9/sys/ (props changed) stable/9/sys/sys/ (props changed) Modified: stable/9/sys/kern/vfs_vnops.c ============================================================================== --- stable/9/sys/kern/vfs_vnops.c Fri Mar 29 12:47:45 2013 (r248878) +++ stable/9/sys/kern/vfs_vnops.c Fri Mar 29 13:17:34 2013 (r248879) @@ -1083,6 +1083,45 @@ vn_io_fault_uiomove(char *data, int xfer return (error); } +int +vn_io_fault_pgmove(vm_page_t ma[], vm_offset_t offset, int xfersize, + struct uio *uio) +{ + struct thread *td; + vm_offset_t iov_base; + int cnt, pgadv; + + td = curthread; + if ((td->td_pflags & TDP_UIOHELD) == 0 || + uio->uio_segflg != UIO_USERSPACE) + return (uiomove_fromphys(ma, offset, xfersize, uio)); + + KASSERT(uio->uio_iovcnt == 1, ("uio_iovcnt %d", uio->uio_iovcnt)); + cnt = xfersize > uio->uio_resid ? uio->uio_resid : xfersize; + iov_base = (vm_offset_t)uio->uio_iov->iov_base; + switch (uio->uio_rw) { + case UIO_WRITE: + pmap_copy_pages(td->td_ma, iov_base & PAGE_MASK, ma, + offset, cnt); + break; + case UIO_READ: + pmap_copy_pages(ma, offset, td->td_ma, iov_base & PAGE_MASK, + cnt); + break; + } + pgadv = ((iov_base + cnt) >> PAGE_SHIFT) - (iov_base >> PAGE_SHIFT); + td->td_ma += pgadv; + KASSERT(td->td_ma_cnt >= pgadv, ("consumed pages %d %d", td->td_ma_cnt, + pgadv)); + td->td_ma_cnt -= pgadv; + uio->uio_iov->iov_base = (char *)(iov_base + cnt); + uio->uio_iov->iov_len -= cnt; + uio->uio_resid -= cnt; + uio->uio_offset += cnt; + return (0); +} + + /* * File table truncate routine. */ Modified: stable/9/sys/sys/vnode.h ============================================================================== --- stable/9/sys/sys/vnode.h Fri Mar 29 12:47:45 2013 (r248878) +++ stable/9/sys/sys/vnode.h Fri Mar 29 13:17:34 2013 (r248879) @@ -690,6 +690,8 @@ int vn_vget_ino(struct vnode *vp, ino_t struct vnode **rvp); int vn_io_fault_uiomove(char *data, int xfersize, struct uio *uio); +int vn_io_fault_pgmove(vm_page_t ma[], vm_offset_t offset, int xfersize, + struct uio *uio); #define vn_rangelock_unlock(vp, cookie) \ rangelock_unlock(&(vp)->v_rl, (cookie), VI_MTX(vp))
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