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File: [cvs.NetBSD.org] / src / lib / libquota / quota_open.c (download)

Revision 1.7, Wed Feb 1 05:34:40 2012 UTC (8 years, 2 months ago) by dholland
Branch: MAIN
CVS Tags: yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb8-mediatek-base, matt-nb8-mediatek, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, localcount-20160914, is-mlppp-base, is-mlppp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, agc-symver-base, agc-symver, HEAD
Branch point for: yamt-pagecache
Changes since 1.6: +7 -7 lines

Change the syscall API for quotas over to the new non-proplib one.

   - struct vfs_quotactl_args -> struct quotactl_args
   - add sys/stdint.h to sys/quotactl.h for clean userland build
   - install sys/quotactl.h in /usr/include
   - update set lists for same
   - add new marshalling code in libquota
   - add new unmarshalling code in vfs_syscalls.c
   - discard proplib interpreter code in vfs_quotactl.c
   - add dispatching code for the 14 quotactl ops in vfs_quotactl.c
   - mark the proplib quotactl syscall obsolete
   - add a new syscall number for the new quotactl syscall
   - change the name of the syscall to __quotactl()
   - remove the decl of the old quotactl from quota/quotaprop.h
   - add a decl of the new quotactl to sys/quotactl.h
   - update the libc build
   - update ktruss
   - remove proplib marshalling code from libquota
   - update copy of syscall table in gdb ppc sources
   - hack rumphijack to accomodate new quotactl name (as I recall,
     pooka wanted such a name change to simplify something, but I
     don't really see what/how)

This change appears to require a kernel version bump for rumpish
reasons.

/*	$NetBSD: quota_open.c,v 1.7 2012/02/01 05:34:40 dholland Exp $	*/
/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by David A. Holland.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__RCSID("$NetBSD: quota_open.c,v 1.7 2012/02/01 05:34:40 dholland Exp $");

#include <sys/types.h>
#include <sys/statvfs.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

#include <quota.h>
#include "quotapvt.h"

struct quotahandle *
quota_open(const char *path)
{

	struct statvfs stv;
	struct quotahandle *qh;
	int mode;
	int serrno;

	/*
	 * Probe order:
	 *
	 *    1. Check for NFS. NFS quota ops don't go to the kernel
	 *    at all but instead do RPCs to the NFS server's
	 *    rpc.rquotad, so it doesn't matter what the kernel
	 *    thinks.
	 *
	 *    2. Check if quotas are enabled in the mount flags. If
	 *    so, we can do quotactl calls.
	 *
	 *    3. Check if the volume is listed in fstab as one of
	 *    the filesystem types supported by quota_oldfiles.c,
	 *    and with the proper mount options to enable quotas.
	 *
	 * Note that (as of this writing) the mount options for
	 * enabling quotas are accepted by mount for *all* filesystem
	 * types and then ignored -- the kernel mount flag (ST_QUOTA /
	 * MNT_QUOTA) gets set either by the filesystem based on its
	 * own criteria, or for old-style quotas, during quotaon. The
	 * quota filenames specified in fstab are not passed to or
	 * known by the kernel except via quota_oldfiles.c! This is
	 * generally gross but not easily fixed.
	 */

	if (statvfs(path, &stv) < 0) {
		return NULL;
	}

	__quota_oldfiles_load_fstab();

	if (!strcmp(stv.f_fstypename, "nfs")) {
		mode = QUOTA_MODE_NFS;
	} else if ((stv.f_flag & ST_QUOTA) != 0) {
		mode = QUOTA_MODE_KERNEL;
	} else if (__quota_oldfiles_infstab(stv.f_mntonname)) {
		mode = QUOTA_MODE_OLDFILES;
	} else {
		errno = EOPNOTSUPP;
		return NULL;
	}

	qh = malloc(sizeof(*qh));
	if (qh == NULL) {
		return NULL;
	}

	/*
	 * Get the mount point from statvfs; this way the passed-in
	 * path can be any path on the volume.
	 */

	qh->qh_mountpoint = strdup(stv.f_mntonname);
	if (qh->qh_mountpoint == NULL) {
		serrno = errno;
		free(qh);
		errno = serrno;
		return NULL;
	}

	qh->qh_mountdevice = strdup(stv.f_mntfromname);
	if (qh->qh_mountdevice == NULL) {
		serrno = errno;
		free(qh->qh_mountpoint);
		free(qh);
		errno = serrno;
		return NULL;
	}

	qh->qh_mode = mode;

	qh->qh_oldfilesopen = 0;
	qh->qh_userfile = -1;
	qh->qh_groupfile = -1;

	return qh;
}

const char *
quota_getmountpoint(struct quotahandle *qh)
{
	return qh->qh_mountpoint;
}

const char *
quota_getmountdevice(struct quotahandle *qh)
{
	return qh->qh_mountdevice;
}

void
quota_close(struct quotahandle *qh)
{
	if (qh->qh_userfile >= 0) {
		close(qh->qh_userfile);
	}
	if (qh->qh_groupfile >= 0) {
		close(qh->qh_groupfile);
	}
	free(qh->qh_mountdevice);
	free(qh->qh_mountpoint);
	free(qh);
}

int
quota_quotaon(struct quotahandle *qh, int idtype)
{
	switch (qh->qh_mode) {
	    case QUOTA_MODE_NFS:
		errno = EOPNOTSUPP;
		break;
	    case QUOTA_MODE_OLDFILES:
		return __quota_oldfiles_quotaon(qh, idtype);
	    case QUOTA_MODE_KERNEL:
		return __quota_kernel_quotaon(qh, idtype);
	    default:
		errno = EINVAL;
		break;
	}
	return -1;
}

int
quota_quotaoff(struct quotahandle *qh, int idtype)
{
	switch (qh->qh_mode) {
	    case QUOTA_MODE_NFS:
		errno = EOPNOTSUPP;
		break;
	    case QUOTA_MODE_OLDFILES:
		/* can't quotaoff if we haven't quotaon'd */
		errno = ENOTCONN;
		break;
	    case QUOTA_MODE_KERNEL:
		return __quota_kernel_quotaoff(qh, idtype);
	    default:
		errno = EINVAL;
		break;
	}
	return -1;
}