From f40c3a9dc50f808e512fcc9f9f738717013b483b Mon Sep 17 00:00:00 2001 From: mckusick Date: Sun, 25 Apr 2010 00:05:51 +0000 Subject: The NFS quota-reporting RPC uses 32-bit sized fields. We approximate 64-bit quota sizes by scaling down the sizes by the minimum amount necessary to fit in a 32-bit field and then upscale the filesystem block size to compensate. For example, if the hard block limit is 0x300000008 then we set the hard block limit to 0xA0000002 and claim that the blocksize is 4 * DEV_BSIZE. This will lose the minimal amount of information thus delivering nearly correct answers. --- libexec/rpc.rquotad/rquotad.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'libexec') diff --git a/libexec/rpc.rquotad/rquotad.c b/libexec/rpc.rquotad/rquotad.c index 3cd1292..d9ce06a 100644 --- a/libexec/rpc.rquotad/rquotad.c +++ b/libexec/rpc.rquotad/rquotad.c @@ -126,6 +126,7 @@ sendquota(struct svc_req *request, SVCXPRT *transp) struct getquota_rslt getq_rslt; struct dqblk dqblk; struct timeval timev; + int scale; bzero(&getq_args, sizeof(getq_args)); if (!svc_getargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) { @@ -142,13 +143,15 @@ sendquota(struct svc_req *request, SVCXPRT *transp) gettimeofday(&timev, NULL); getq_rslt.status = Q_OK; getq_rslt.getquota_rslt_u.gqr_rquota.rq_active = TRUE; - getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize = DEV_BSIZE; + scale = 1 << flsll(dqblk.dqb_bhardlimit >> 32); + getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize = + DEV_BSIZE * scale; getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit = - dqblk.dqb_bhardlimit; + dqblk.dqb_bhardlimit / scale; getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit = - dqblk.dqb_bsoftlimit; + dqblk.dqb_bsoftlimit / scale; getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks = - dqblk.dqb_curblocks; + dqblk.dqb_curblocks / scale; getq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit = dqblk.dqb_ihardlimit; getq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit = -- cgit v1.1