/*
 * This gets called when the inode's version needs to be changed from 1 to 2.
 * Currently this happens when the nlink field overflows the old 16-bit value
 * or when chproj is called to change the project for the first time.
 * As a side effect the superblock version will also get rev'd
 * to contain the NLINK bit.
 */
void
xfs_bump_ino_vers2(
	xfs_trans_t	*tp,
	xfs_inode_t	*ip)
{
	xfs_mount_t	*mp;
	unsigned long		s;

	ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE));
	ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1);

	ip->i_d.di_version = XFS_DINODE_VERSION_2;
	ip->i_d.di_onlink = 0;
	memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
	mp = tp->t_mountp;
	if (!XFS_SB_VERSION_HASNLINK(&mp->m_sb)) {
		s = XFS_SB_LOCK(mp);
		if (!XFS_SB_VERSION_HASNLINK(&mp->m_sb)) {
			XFS_SB_VERSION_ADDNLINK(&mp->m_sb);
			XFS_SB_UNLOCK(mp, s);
			xfs_mod_sb(tp, XFS_SB_VERSIONNUM);
		} else {
			XFS_SB_UNLOCK(mp, s);
		}
	}
	/* Caller must log the inode */
}
コード例 #2
0
STATIC int
xfs_qm_log_quotaoff(
	xfs_mount_t	       *mp,
	xfs_qoff_logitem_t     **qoffstartp,
	uint		       flags)
{
	xfs_trans_t	       *tp;
	int			error;
	unsigned long	s;
	xfs_qoff_logitem_t     *qoffi=NULL;
	uint			oldsbqflag=0;

	tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
	if ((error = xfs_trans_reserve(tp, 0,
				      sizeof(xfs_qoff_logitem_t) * 2 +
				      mp->m_sb.sb_sectsize + 128,
				      0,
				      0,
				      XFS_DEFAULT_LOG_COUNT))) {
		goto error0;
	}

	qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
	xfs_trans_log_quotaoff_item(tp, qoffi);

	s = XFS_SB_LOCK(mp);
	oldsbqflag = mp->m_sb.sb_qflags;
	mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
	XFS_SB_UNLOCK(mp, s);

	xfs_mod_sb(tp, XFS_SB_QFLAGS);

	/*
	 * We have to make sure that the transaction is secure on disk before we
	 * return and actually stop quota accounting. So, make it synchronous.
	 * We don't care about quotoff's performance.
	 */
	xfs_trans_set_sync(tp);
	error = xfs_trans_commit(tp, 0, NULL);

error0:
	if (error) {
		xfs_trans_cancel(tp, 0);
		/*
		 * No one else is modifying sb_qflags, so this is OK.
		 * We still hold the quotaofflock.
		 */
		s = XFS_SB_LOCK(mp);
		mp->m_sb.sb_qflags = oldsbqflag;
		XFS_SB_UNLOCK(mp, s);
	}
	*qoffstartp = qoffi;
	return (error);
}
コード例 #3
0
/*
 * xfs_statvfs
 *
 * Fill in the statvfs structure for the given file system.  We use
 * the superblock lock in the mount structure to ensure a consistent
 * snapshot of the counters returned.
 */
STATIC int
xfs_statvfs(
	bhv_desc_t	*bdp,
	xfs_statfs_t	*statp,
	vnode_t		*vp)
{
	__uint64_t	fakeinos;
	xfs_extlen_t	lsize;
	xfs_mount_t	*mp;
	xfs_sb_t	*sbp;
	unsigned long	s;
	u64 id;

	mp = XFS_BHVTOM(bdp);
	sbp = &(mp->m_sb);

	statp->f_type = XFS_SB_MAGIC;

	s = XFS_SB_LOCK(mp);
	statp->f_bsize = sbp->sb_blocksize;
	lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
	statp->f_blocks = sbp->sb_dblocks - lsize;
	statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
	fakeinos = statp->f_bfree << sbp->sb_inopblog;
#if XFS_BIG_INUMS
	fakeinos += mp->m_inoadd;
#endif
	statp->f_files =
	    MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
	if (mp->m_maxicount)
#if XFS_BIG_INUMS
		if (!mp->m_inoadd)
#endif
			statp->f_files = min_t(typeof(statp->f_files),
						statp->f_files,
						mp->m_maxicount);
	statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
	XFS_SB_UNLOCK(mp, s);

	id = huge_encode_dev(mp->m_dev);
	statp->f_fsid.val[0] = (u32)id;
	statp->f_fsid.val[1] = (u32)(id >> 32);
	statp->f_namelen = MAXNAMELEN - 1;

	return 0;
}
コード例 #4
0
/*
 * Clear the quotaflags in memory and in the superblock.
 */
int
xfs_mount_reset_sbqflags(xfs_mount_t *mp)
{
    int			error;
    xfs_trans_t		*tp;
    unsigned long		s;

    mp->m_qflags = 0;
    /*
     * It is OK to look at sb_qflags here in mount path,
     * without SB_LOCK.
     */
    if (mp->m_sb.sb_qflags == 0)
        return 0;
    s = XFS_SB_LOCK(mp);
    mp->m_sb.sb_qflags = 0;
    XFS_SB_UNLOCK(mp, s);

    /*
     * if the fs is readonly, let the incore superblock run
     * with quotas off but don't flush the update out to disk
     */
    if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
        return 0;
#ifdef QUOTADEBUG
    xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
#endif
    tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
    if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
                                   XFS_DEFAULT_LOG_COUNT))) {
        xfs_trans_cancel(tp, 0);
        xfs_fs_cmn_err(CE_ALERT, mp,
                       "xfs_mount_reset_sbqflags: Superblock update failed!");
        return error;
    }
    xfs_mod_sb(tp, XFS_SB_QFLAGS);
    error = xfs_trans_commit(tp, 0, NULL);
    return error;
}
コード例 #5
0
/*
 * Switch on (a given) quota enforcement for a filesystem.  This takes
 * effect immediately.
 * (Switching on quota accounting must be done at mount time.)
 */
STATIC int
xfs_qm_scall_quotaon(
	xfs_mount_t	*mp,
	uint		flags)
{
	int		error;
	unsigned long	s;
	uint		qf;
	uint		accflags;
	__int64_t	sbflags;

	if (!capable(CAP_SYS_ADMIN))
		return XFS_ERROR(EPERM);

	flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
	/*
	 * Switching on quota accounting must be done at mount time.
	 */
	accflags = flags & XFS_ALL_QUOTA_ACCT;
	flags &= ~(XFS_ALL_QUOTA_ACCT);

	sbflags = 0;

	if (flags == 0) {
		qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
		return XFS_ERROR(EINVAL);
	}

	/* No fs can turn on quotas with a delayed effect */
	ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);

	/*
	 * Can't enforce without accounting. We check the superblock
	 * qflags here instead of m_qflags because rootfs can have
	 * quota acct on ondisk without m_qflags' knowing.
	 */
	if (((flags & XFS_UQUOTA_ACCT) == 0 &&
	    (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
	    (flags & XFS_UQUOTA_ENFD))
	    ||
	    ((flags & XFS_PQUOTA_ACCT) == 0 &&
	    (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
	    (flags & XFS_OQUOTA_ENFD))
	    ||
	    ((flags & XFS_GQUOTA_ACCT) == 0 &&
	    (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
	    (flags & XFS_OQUOTA_ENFD))) {
		qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
			flags, mp->m_sb.sb_qflags);
		return XFS_ERROR(EINVAL);
	}
	/*
	 * If everything's upto-date incore, then don't waste time.
	 */
	if ((mp->m_qflags & flags) == flags)
		return XFS_ERROR(EEXIST);

	/*
	 * Change sb_qflags on disk but not incore mp->qflags
	 * if this is the root filesystem.
	 */
	s = XFS_SB_LOCK(mp);
	qf = mp->m_sb.sb_qflags;
	mp->m_sb.sb_qflags = qf | flags;
	XFS_SB_UNLOCK(mp, s);

	/*
	 * There's nothing to change if it's the same.
	 */
	if ((qf & flags) == flags && sbflags == 0)
		return XFS_ERROR(EEXIST);
	sbflags |= XFS_SB_QFLAGS;

	if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
		return (error);
	/*
	 * If we aren't trying to switch on quota enforcement, we are done.
	 */
	if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
	     (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
	     ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
	     (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
	     ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
	     (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
	    (flags & XFS_ALL_QUOTA_ENFD) == 0)
		return (0);

	if (! XFS_IS_QUOTA_RUNNING(mp))
		return XFS_ERROR(ESRCH);

	/*
	 * Switch on quota enforcement in core.
	 */
	mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
	mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
	mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));

	return (0);
}
コード例 #6
0
/*
 * Turn off quota accounting and/or enforcement for all udquots and/or
 * gdquots. Called only at unmount time.
 *
 * This assumes that there are no dquots of this file system cached
 * incore, and modifies the ondisk dquot directly. Therefore, for example,
 * it is an error to call this twice, without purging the cache.
 */
STATIC int
xfs_qm_scall_quotaoff(
	xfs_mount_t		*mp,
	uint			flags,
	boolean_t		force)
{
	uint			dqtype;
	unsigned long	s;
	int			error;
	uint			inactivate_flags;
	xfs_qoff_logitem_t	*qoffstart;
	int			nculprits;

	if (!force && !capable(CAP_SYS_ADMIN))
		return XFS_ERROR(EPERM);
	/*
	 * No file system can have quotas enabled on disk but not in core.
	 * Note that quota utilities (like quotaoff) _expect_
	 * errno == EEXIST here.
	 */
	if ((mp->m_qflags & flags) == 0)
		return XFS_ERROR(EEXIST);
	error = 0;

	flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);

	/*
	 * We don't want to deal with two quotaoffs messing up each other,
	 * so we're going to serialize it. quotaoff isn't exactly a performance
	 * critical thing.
	 * If quotaoff, then we must be dealing with the root filesystem.
	 */
	ASSERT(mp->m_quotainfo);
	if (mp->m_quotainfo)
		mutex_lock(&(XFS_QI_QOFFLOCK(mp)));

	ASSERT(mp->m_quotainfo);

	/*
	 * If we're just turning off quota enforcement, change mp and go.
	 */
	if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
		mp->m_qflags &= ~(flags);

		s = XFS_SB_LOCK(mp);
		mp->m_sb.sb_qflags = mp->m_qflags;
		XFS_SB_UNLOCK(mp, s);
		mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));

		/* XXX what to do if error ? Revert back to old vals incore ? */
		error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
		return (error);
	}

	dqtype = 0;
	inactivate_flags = 0;
	/*
	 * If accounting is off, we must turn enforcement off, clear the
	 * quota 'CHKD' certificate to make it known that we have to
	 * do a quotacheck the next time this quota is turned on.
	 */
	if (flags & XFS_UQUOTA_ACCT) {
		dqtype |= XFS_QMOPT_UQUOTA;
		flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
		inactivate_flags |= XFS_UQUOTA_ACTIVE;
	}
	if (flags & XFS_GQUOTA_ACCT) {
		dqtype |= XFS_QMOPT_GQUOTA;
		flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
		inactivate_flags |= XFS_GQUOTA_ACTIVE;
	} else if (flags & XFS_PQUOTA_ACCT) {
		dqtype |= XFS_QMOPT_PQUOTA;
		flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
		inactivate_flags |= XFS_PQUOTA_ACTIVE;
	}

	/*
	 * Nothing to do?  Don't complain. This happens when we're just
	 * turning off quota enforcement.
	 */
	if ((mp->m_qflags & flags) == 0) {
		mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
		return (0);
	}

	/*
	 * Write the LI_QUOTAOFF log record, and do SB changes atomically,
	 * and synchronously.
	 */
	xfs_qm_log_quotaoff(mp, &qoffstart, flags);

	/*
	 * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
	 * to take care of the race between dqget and quotaoff. We don't take
	 * any special locks to reset these bits. All processes need to check
	 * these bits *after* taking inode lock(s) to see if the particular
	 * quota type is in the process of being turned off. If *ACTIVE, it is
	 * guaranteed that all dquot structures and all quotainode ptrs will all
	 * stay valid as long as that inode is kept locked.
	 *
	 * There is no turning back after this.
	 */
	mp->m_qflags &= ~inactivate_flags;

	/*
	 * Give back all the dquot reference(s) held by inodes.
	 * Here we go thru every single incore inode in this file system, and
	 * do a dqrele on the i_udquot/i_gdquot that it may have.
	 * Essentially, as long as somebody has an inode locked, this guarantees
	 * that quotas will not be turned off. This is handy because in a
	 * transaction once we lock the inode(s) and check for quotaon, we can
	 * depend on the quota inodes (and other things) being valid as long as
	 * we keep the lock(s).
	 */
	xfs_qm_dqrele_all_inodes(mp, flags);

	/*
	 * Next we make the changes in the quota flag in the mount struct.
	 * This isn't protected by a particular lock directly, because we
	 * don't want to take a mrlock everytime we depend on quotas being on.
	 */
	mp->m_qflags &= ~(flags);

	/*
	 * Go through all the dquots of this file system and purge them,
	 * according to what was turned off. We may not be able to get rid
	 * of all dquots, because dquots can have temporary references that
	 * are not attached to inodes. eg. xfs_setattr, xfs_create.
	 * So, if we couldn't purge all the dquots from the filesystem,
	 * we can't get rid of the incore data structures.
	 */
	while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
		delay(10 * nculprits);

	/*
	 * Transactions that had started before ACTIVE state bit was cleared
	 * could have logged many dquots, so they'd have higher LSNs than
	 * the first QUOTAOFF log record does. If we happen to crash when
	 * the tail of the log has gone past the QUOTAOFF record, but
	 * before the last dquot modification, those dquots __will__
	 * recover, and that's not good.
	 *
	 * So, we have QUOTAOFF start and end logitems; the start
	 * logitem won't get overwritten until the end logitem appears...
	 */
	xfs_qm_log_quotaoff_end(mp, qoffstart, flags);

	/*
	 * If quotas is completely disabled, close shop.
	 */
	if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
	    ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
		mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
		xfs_qm_destroy_quotainfo(mp);
		return (0);
	}

	/*
	 * Release our quotainode references, and vn_purge them,
	 * if we don't need them anymore.
	 */
	if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
		XFS_PURGE_INODE(XFS_QI_UQIP(mp));
		XFS_QI_UQIP(mp) = NULL;
	}
	if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
		XFS_PURGE_INODE(XFS_QI_GQIP(mp));
		XFS_QI_GQIP(mp) = NULL;
	}
	mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));

	return (error);
}