diff options
author | dfr <dfr@FreeBSD.org> | 1994-09-28 16:45:22 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 1994-09-28 16:45:22 +0000 |
commit | 57b6c0c34c7d3130b7c00e4293686bd588419fe6 (patch) | |
tree | 31a9fd0d25f683274b252c0f76348271e04406c4 /sys/nfs | |
parent | c49750310fc7779d5e19ee11d35ae43d4a9d4548 (diff) | |
download | FreeBSD-src-57b6c0c34c7d3130b7c00e4293686bd588419fe6.zip FreeBSD-src-57b6c0c34c7d3130b7c00e4293686bd588419fe6.tar.gz |
Make NFS ask the filesystems for directory cookies instead of making them
itself.
Diffstat (limited to 'sys/nfs')
-rw-r--r-- | sys/nfs/nfs_serv.c | 104 |
1 files changed, 65 insertions, 39 deletions
diff --git a/sys/nfs/nfs_serv.c b/sys/nfs/nfs_serv.c index 55897c4..d43a86e 100644 --- a/sys/nfs/nfs_serv.c +++ b/sys/nfs/nfs_serv.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * @(#)nfs_serv.c 8.3 (Berkeley) 1/12/94 - * $Id: nfs_serv.c,v 1.4 1994/08/29 06:09:06 davidg Exp $ + * $Id: nfs_serv.c,v 1.5 1994/09/22 19:38:25 wollman Exp $ */ /* @@ -1382,14 +1382,15 @@ nfsrv_readdir(nfsd, mrep, md, dpos, cred, nam, mrq) int len, nlen, rem, xfer, tsiz, i, error = 0; int siz, cnt, fullsiz, eofflag, rdonly, cache; u_quad_t frev; - u_long on, off, toff; + u_long off, toff; + int ncookies; + u_int *cookies; + u_int *cookiep; fhp = &nfh.fh_generic; nfsm_srvmtofh(fhp); nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); - toff = fxdr_unsigned(u_long, *tl++); - off = (toff & ~(NFS_DIRBLKSIZ-1)); - on = (toff & (NFS_DIRBLKSIZ-1)); + off = toff = fxdr_unsigned(u_long, *tl++); cnt = fxdr_unsigned(int, *tl); siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); if (cnt > NFS_MAXREADDIR) @@ -1414,17 +1415,27 @@ again: io.uio_segflg = UIO_SYSSPACE; io.uio_rw = UIO_READ; io.uio_procp = (struct proc *)0; - error = VOP_READDIR(vp, &io, cred); + cookies = NULL; + eofflag = 0; + error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); off = (off_t)io.uio_offset; if (error) { vrele(vp); free((caddr_t)rbuf, M_TEMP); nfsm_reply(0); } - if (io.uio_resid < fullsiz) - eofflag = 0; - else - eofflag = 1; + if (cookies == NULL) { + /* + * If the filesystem doen't support cookies, return eof. + */ + vrele(vp); + nfsm_reply(2*NFSX_UNSIGNED); + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + *tl++ = nfs_false; + *tl = nfs_true; + FREE((caddr_t)rbuf, M_TEMP); + return (0); + } if (io.uio_resid) { siz -= io.uio_resid; @@ -1439,6 +1450,7 @@ again: *tl++ = nfs_false; *tl = nfs_true; FREE((caddr_t)rbuf, M_TEMP); + FREE(cookies, M_TEMP); return (0); } } @@ -1447,23 +1459,24 @@ again: * Check for degenerate cases of nothing useful read. * If so go try again */ - cpos = rbuf + on; + cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; - while (cpos < cend && dp->d_fileno == 0) { + cookiep = cookies; + while (cpos < cend && ncookies > 0 + && (*cookiep <= toff || dp->d_fileno == 0)) { cpos += dp->d_reclen; dp = (struct dirent *)cpos; + cookiep++; + ncookies--; } if (cpos >= cend) { toff = off; siz = fullsiz; - on = 0; + FREE(cookies, M_TEMP); goto again; } - cpos = rbuf + on; - cend = rbuf + siz; - dp = (struct dirent *)cpos; len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ nfsm_reply(siz); mp = mp2 = mb; @@ -1515,13 +1528,12 @@ again: nfsm_clget; /* Finish off the record */ - toff += dp->d_reclen; - *tl = txdr_unsigned(toff); + *tl = txdr_unsigned(*cookiep); bp += NFSX_UNSIGNED; - } else - toff += dp->d_reclen; + } cpos += dp->d_reclen; dp = (struct dirent *)cpos; + cookiep++; } vrele(vp); nfsm_clget; @@ -1539,6 +1551,7 @@ again: } else mp->m_len += bp - bpos; FREE(rbuf, M_TEMP); + FREE(cookies, M_TEMP); nfsm_srvdone; } @@ -1570,14 +1583,15 @@ nqnfsrv_readdirlook(nfsd, mrep, md, dpos, cred, nam, mrq) int len, nlen, rem, xfer, tsiz, i, error = 0, duration2, cache2; int siz, cnt, fullsiz, eofflag, rdonly, cache; u_quad_t frev, frev2; - u_long on, off, toff; + u_long off, toff; + int ncookies; + u_int *cookies; + u_int *cookiep; fhp = &nfh.fh_generic; nfsm_srvmtofh(fhp); nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); - toff = fxdr_unsigned(u_long, *tl++); - off = (toff & ~(NFS_DIRBLKSIZ-1)); - on = (toff & (NFS_DIRBLKSIZ-1)); + toff = off = fxdr_unsigned(u_long, *tl++); cnt = fxdr_unsigned(int, *tl++); duration2 = fxdr_unsigned(int, *tl); siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); @@ -1603,17 +1617,27 @@ again: io.uio_segflg = UIO_SYSSPACE; io.uio_rw = UIO_READ; io.uio_procp = (struct proc *)0; - error = VOP_READDIR(vp, &io, cred); + cookies = NULL; + eofflag = 0; + error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); off = (u_long)io.uio_offset; if (error) { vrele(vp); free((caddr_t)rbuf, M_TEMP); nfsm_reply(0); } - if (io.uio_resid < fullsiz) - eofflag = 0; - else - eofflag = 1; + if (cookies == NULL) { + /* + * If the filesystem doen't support cookies, return eof. + */ + vrele(vp); + nfsm_reply(2*NFSX_UNSIGNED); + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + *tl++ = nfs_false; + *tl = nfs_true; + FREE((caddr_t)rbuf, M_TEMP); + return (0); + } if (io.uio_resid) { siz -= io.uio_resid; @@ -1628,6 +1652,7 @@ again: *tl++ = nfs_false; *tl = nfs_true; FREE((caddr_t)rbuf, M_TEMP); + FREE(cookies, M_TEMP); return (0); } } @@ -1636,23 +1661,24 @@ again: * Check for degenerate cases of nothing useful read. * If so go try again */ - cpos = rbuf + on; + cpos = rbuf; cend = rbuf + siz; dp = (struct dirent *)cpos; - while (cpos < cend && dp->d_fileno == 0) { + cookiep = cookies; + while (cpos < cend && ncookies > 0 + && (*cookiep <= toff || dp->d_fileno == 0)) { cpos += dp->d_reclen; dp = (struct dirent *)cpos; + cookiep++; + ncookies--; } if (cpos >= cend) { toff = off; siz = fullsiz; - on = 0; + FREE(cookies, M_TEMP); goto again; } - cpos = rbuf + on; - cend = rbuf + siz; - dp = (struct dirent *)cpos; len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ nfsm_reply(siz); mp = mp2 = mb; @@ -1752,14 +1778,13 @@ again: nfsm_clget; /* Finish off the record */ - toff += dp->d_reclen; - *tl = txdr_unsigned(toff); + *tl = txdr_unsigned(*cookiep); bp += NFSX_UNSIGNED; - } else + } invalid: - toff += dp->d_reclen; cpos += dp->d_reclen; dp = (struct dirent *)cpos; + cookiep++; } vrele(vp); nfsm_clget; @@ -1777,6 +1802,7 @@ invalid: } else mp->m_len += bp - bpos; FREE(rbuf, M_TEMP); + FREE(cookies, M_TEMP); nfsm_srvdone; } |