patch-2.4.25 linux-2.4.25/fs/xfs/xfs_itable.c

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diff -urN linux-2.4.24/fs/xfs/xfs_itable.c linux-2.4.25/fs/xfs/xfs_itable.c
@@ -0,0 +1,825 @@
+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_ag.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_ialloc.h"
+#include "xfs_itable.h"
+#include "xfs_error.h"
+
+/*
+ * Return stat information for one inode.
+ * Return 0 if ok, else errno.
+ */
+int					/* error status */
+xfs_bulkstat_one(
+	xfs_mount_t	*mp,		/* mount point for filesystem */
+	xfs_trans_t	*tp,		/* transaction pointer */
+	xfs_ino_t	ino,		/* inode number to get data for */
+	void		*buffer,	/* buffer to place output in */
+	int		ubsize,		/* size of buffer */
+	void		*private_data,	/* my private data */
+	xfs_daddr_t	bno,		/* starting bno of inode cluster */
+	int		*ubused,	/* bytes used by me */
+	void		*dibuff,	/* on-disk inode buffer */
+	int		*stat)		/* BULKSTAT_RV_... */
+{
+	xfs_bstat_t	*buf;		/* return buffer */
+	int		error;		/* error value */
+	xfs_dinode_t	*dip;		/* dinode inode pointer */
+	xfs_dinode_core_t *dic;		/* dinode core info pointer */
+	xfs_inode_t	*ip = NULL;	/* incore inode pointer */
+	xfs_arch_t      arch;           /* these are set according to      */
+	__uint16_t      di_flags;       /* temp */
+
+	buf = (xfs_bstat_t *)buffer;
+	dip = (xfs_dinode_t *)dibuff;
+
+	if (! buf || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
+	    (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
+	     (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) {
+		*stat = BULKSTAT_RV_NOTHING;
+		return XFS_ERROR(EINVAL);
+	}
+	if (ubsize < sizeof(*buf)) {
+		*stat = BULKSTAT_RV_NOTHING;
+		return XFS_ERROR(ENOMEM);
+	}
+
+	if (dip == NULL) {
+		/* We're not being passed a pointer to a dinode.  This happens
+		 * if BULKSTAT_FG_IGET is selected.  Do the iget.
+		 */
+		error = xfs_iget(mp, tp, ino, XFS_ILOCK_SHARED, &ip, bno);
+		if (error) {
+			*stat = BULKSTAT_RV_NOTHING;
+			return error;
+		}
+		ASSERT(ip != NULL);
+		ASSERT(ip->i_blkno != (xfs_daddr_t)0);
+		if (ip->i_d.di_mode == 0) {
+			xfs_iput_new(ip, XFS_ILOCK_SHARED);
+			*stat = BULKSTAT_RV_NOTHING;
+			return XFS_ERROR(ENOENT);
+		}
+		dic = &ip->i_d;
+		arch = ARCH_NOCONVERT;		/* in-core! */
+		ASSERT(dic != NULL);
+
+		/* xfs_iget returns the following without needing
+		 * further change.
+		 */
+		buf->bs_nlink = dic->di_nlink;
+		buf->bs_projid = dic->di_projid;
+
+	} else {
+		dic = &dip->di_core;
+		ASSERT(dic != NULL);
+
+		/* buffer dinode_core is in on-disk arch */
+		arch = ARCH_CONVERT;
+
+		/*
+		 * The inode format changed when we moved the link count and
+		 * made it 32 bits long.  If this is an old format inode,
+		 * convert it in memory to look like a new one.  If it gets
+		 * flushed to disk we will convert back before flushing or
+		 * logging it.  We zero out the new projid field and the old link
+		 * count field.  We'll handle clearing the pad field (the remains
+		 * of the old uuid field) when we actually convert the inode to
+		 * the new format. We don't change the version number so that we
+		 * can distinguish this from a real new format inode.
+		 */
+		if (INT_GET(dic->di_version, arch) == XFS_DINODE_VERSION_1) {
+			buf->bs_nlink = INT_GET(dic->di_onlink, arch);
+			buf->bs_projid = 0;
+		}
+		else {
+			buf->bs_nlink = INT_GET(dic->di_nlink, arch);
+			buf->bs_projid = INT_GET(dic->di_projid, arch);
+		}
+
+	}
+
+	buf->bs_ino = ino;
+	buf->bs_mode = INT_GET(dic->di_mode, arch);
+	buf->bs_uid = INT_GET(dic->di_uid, arch);
+	buf->bs_gid = INT_GET(dic->di_gid, arch);
+	buf->bs_size = INT_GET(dic->di_size, arch);
+	buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, arch);
+	buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, arch);
+	buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, arch);
+	buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, arch);
+	buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, arch);
+	buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, arch);
+	/*
+	 * convert di_flags to bs_xflags.
+	 */
+	di_flags = INT_GET(dic->di_flags, arch);
+
+	buf->bs_xflags =
+		((di_flags & XFS_DIFLAG_REALTIME) ?
+			XFS_XFLAG_REALTIME : 0) |
+		((di_flags & XFS_DIFLAG_PREALLOC) ?
+			XFS_XFLAG_PREALLOC : 0) |
+	        ((di_flags & XFS_DIFLAG_IMMUTABLE) ?
+		        XFS_XFLAG_IMMUTABLE : 0) |
+		((di_flags & XFS_DIFLAG_APPEND) ?
+		        XFS_XFLAG_APPEND : 0) |
+		((di_flags & XFS_DIFLAG_SYNC) ?
+		        XFS_XFLAG_SYNC : 0) |
+		((di_flags & XFS_DIFLAG_NOATIME) ?
+		        XFS_XFLAG_NOATIME : 0) |
+		((di_flags & XFS_DIFLAG_NODUMP) ?
+		        XFS_XFLAG_NODUMP : 0) |
+		(XFS_CFORK_Q_ARCH(dic, arch) ?
+			XFS_XFLAG_HASATTR : 0);
+
+	buf->bs_extsize = INT_GET(dic->di_extsize, arch) << mp->m_sb.sb_blocklog;
+	buf->bs_extents = INT_GET(dic->di_nextents, arch);
+	buf->bs_gen = INT_GET(dic->di_gen, arch);
+	memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
+	buf->bs_dmevmask = INT_GET(dic->di_dmevmask, arch);
+	buf->bs_dmstate = INT_GET(dic->di_dmstate, arch);
+	buf->bs_aextents = INT_GET(dic->di_anextents, arch);
+
+	switch (INT_GET(dic->di_format, arch)) {
+	case XFS_DINODE_FMT_DEV:
+		if ( ip ) {
+			buf->bs_rdev = ip->i_df.if_u2.if_rdev;
+		} else {
+			buf->bs_rdev = INT_GET(dip->di_u.di_dev, arch);
+		}
+
+		buf->bs_blksize = BLKDEV_IOSIZE;
+		buf->bs_blocks = 0;
+		break;
+	case XFS_DINODE_FMT_LOCAL:
+	case XFS_DINODE_FMT_UUID:
+		buf->bs_rdev = 0;
+		buf->bs_blksize = mp->m_sb.sb_blocksize;
+		buf->bs_blocks = 0;
+		break;
+	case XFS_DINODE_FMT_EXTENTS:
+	case XFS_DINODE_FMT_BTREE:
+		buf->bs_rdev = 0;
+		buf->bs_blksize = mp->m_sb.sb_blocksize;
+		if ( ip ) {
+			buf->bs_blocks = INT_GET(dic->di_nblocks, arch) + ip->i_delayed_blks;
+		} else {
+			buf->bs_blocks = INT_GET(dic->di_nblocks, arch);
+		}
+		break;
+	}
+
+	if (ip) {
+		xfs_iput(ip, XFS_ILOCK_SHARED);
+	}
+
+	*stat = BULKSTAT_RV_DIDONE;
+	if (ubused)
+		*ubused = sizeof(*buf);
+	return 0;
+}
+
+/*
+ * Return stat information in bulk (by-inode) for the filesystem.
+ */
+int					/* error status */
+xfs_bulkstat(
+	xfs_mount_t		*mp,	/* mount point for filesystem */
+	xfs_trans_t		*tp,	/* transaction pointer */
+	xfs_ino_t		*lastinop, /* last inode returned */
+	int			*ubcountp, /* size of buffer/count returned */
+	bulkstat_one_pf		formatter, /* func that'd fill a single buf */
+	void			*private_data,/* private data for formatter */
+	size_t			statstruct_size, /* sizeof struct filling */
+	xfs_caddr_t		ubuffer, /* buffer with inode stats */
+	int			flags,	/* defined in xfs_itable.h */
+	int			*done)	/* 1 if there're more stats to get */
+{
+	xfs_agblock_t		agbno=0;/* allocation group block number */
+	xfs_buf_t		*agbp;	/* agi header buffer */
+	xfs_agi_t		*agi;	/* agi header data */
+	xfs_agino_t		agino;	/* inode # in allocation group */
+	xfs_agnumber_t		agno;	/* allocation group number */
+	xfs_daddr_t		bno;	/* inode cluster start daddr */
+	int			chunkidx; /* current index into inode chunk */
+	int			clustidx; /* current index into inode cluster */
+	xfs_btree_cur_t		*cur;	/* btree cursor for ialloc btree */
+	int			end_of_ag; /* set if we've seen the ag end */
+	int			error;	/* error code */
+	int                     fmterror;/* bulkstat formatter result */
+	__int32_t		gcnt;	/* current btree rec's count */
+	xfs_inofree_t		gfree;	/* current btree rec's free mask */
+	xfs_agino_t		gino;	/* current btree rec's start inode */
+	int			i;	/* loop index */
+	int			icount;	/* count of inodes good in irbuf */
+	xfs_ino_t		ino;	/* inode number (filesystem) */
+	xfs_inobt_rec_t		*irbp;	/* current irec buffer pointer */
+	xfs_inobt_rec_t		*irbuf;	/* start of irec buffer */
+	xfs_inobt_rec_t		*irbufend; /* end of good irec buffer entries */
+	xfs_ino_t		lastino=0; /* last inode number returned */
+	int			nbcluster; /* # of blocks in a cluster */
+	int			nicluster; /* # of inodes in a cluster */
+	int			nimask;	/* mask for inode clusters */
+	int			nirbuf;	/* size of irbuf */
+	int			rval;	/* return value error code */
+	int			tmp;	/* result value from btree calls */
+	int			ubcount; /* size of user's buffer */
+	int			ubleft;	/* bytes left in user's buffer */
+	xfs_caddr_t		ubufp;	/* current pointer into user's buffer */
+	int			ubelem;	/* spaces used in user's buffer */
+	int			ubused;	/* bytes used by formatter */
+	xfs_buf_t		*bp;	/* ptr to on-disk inode cluster buf */
+	xfs_dinode_t		*dip;	/* ptr into bp for specific inode */
+	xfs_inode_t		*ip;	/* ptr to in-core inode struct */
+
+	/*
+	 * Get the last inode value, see if there's nothing to do.
+	 */
+	ino = (xfs_ino_t)*lastinop;
+	dip = NULL;
+	agno = XFS_INO_TO_AGNO(mp, ino);
+	agino = XFS_INO_TO_AGINO(mp, ino);
+	if (agno >= mp->m_sb.sb_agcount ||
+	    ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
+		*done = 1;
+		*ubcountp = 0;
+		return 0;
+	}
+	ubcount = *ubcountp; /* statstruct's */
+	ubleft = ubcount * statstruct_size; /* bytes */
+	*ubcountp = ubelem = 0;
+	*done = 0;
+	fmterror = 0;
+	ubufp = ubuffer;
+	nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
+		mp->m_sb.sb_inopblock :
+		(XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
+	nimask = ~(nicluster - 1);
+	nbcluster = nicluster >> mp->m_sb.sb_inopblog;
+	/*
+	 * Lock down the user's buffer. If a buffer was not sent, as in the case
+	 * disk quota code calls here, we skip this.
+	 */
+#if defined(HAVE_USERACC)
+	if (ubuffer &&
+	    (error = useracc(ubuffer, ubcount * statstruct_size,
+			(B_READ|B_PHYS), NULL))) {
+		return error;
+	}
+#endif
+	/*
+	 * Allocate a page-sized buffer for inode btree records.
+	 * We could try allocating something smaller, but for normal
+	 * calls we'll always (potentially) need the whole page.
+	 */
+	irbuf = kmem_alloc(NBPC, KM_SLEEP);
+	nirbuf = NBPC / sizeof(*irbuf);
+	/*
+	 * Loop over the allocation groups, starting from the last
+	 * inode returned; 0 means start of the allocation group.
+	 */
+	rval = 0;
+	while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) {
+		bp = NULL;
+		down_read(&mp->m_peraglock);
+		error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
+		up_read(&mp->m_peraglock);
+		if (error) {
+			/*
+			 * Skip this allocation group and go to the next one.
+			 */
+			agno++;
+			agino = 0;
+			continue;
+		}
+		agi = XFS_BUF_TO_AGI(agbp);
+		/*
+		 * Allocate and initialize a btree cursor for ialloc btree.
+		 */
+		cur = xfs_btree_init_cursor(mp, tp, agbp, agno, XFS_BTNUM_INO,
+			(xfs_inode_t *)0, 0);
+		irbp = irbuf;
+		irbufend = irbuf + nirbuf;
+		end_of_ag = 0;
+		/*
+		 * If we're returning in the middle of an allocation group,
+		 * we need to get the remainder of the chunk we're in.
+		 */
+		if (agino > 0) {
+			/*
+			 * Lookup the inode chunk that this inode lives in.
+			 */
+			error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
+			if (!error &&	/* no I/O error */
+			    tmp &&	/* lookup succeeded */
+					/* got the record, should always work */
+			    !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
+				    &gfree, &i, ARCH_NOCONVERT)) &&
+			    i == 1 &&
+					/* this is the right chunk */
+			    agino < gino + XFS_INODES_PER_CHUNK &&
+					/* lastino was not last in chunk */
+			    (chunkidx = agino - gino + 1) <
+				    XFS_INODES_PER_CHUNK &&
+					/* there are some left allocated */
+			    XFS_INOBT_MASKN(chunkidx,
+				    XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
+				/*
+				 * Grab the chunk record.  Mark all the
+				 * uninteresting inodes (because they're
+				 * before our start point) free.
+				 */
+				for (i = 0; i < chunkidx; i++) {
+					if (XFS_INOBT_MASK(i) & ~gfree)
+						gcnt++;
+				}
+				gfree |= XFS_INOBT_MASKN(0, chunkidx);
+				INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
+				INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
+				INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
+				irbp++;
+				agino = gino + XFS_INODES_PER_CHUNK;
+				icount = XFS_INODES_PER_CHUNK - gcnt;
+			} else {
+				/*
+				 * If any of those tests failed, bump the
+				 * inode number (just in case).
+				 */
+				agino++;
+				icount = 0;
+			}
+			/*
+			 * In any case, increment to the next record.
+			 */
+			if (!error)
+				error = xfs_inobt_increment(cur, 0, &tmp);
+		} else {
+			/*
+			 * Start of ag.  Lookup the first inode chunk.
+			 */
+			error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
+			icount = 0;
+		}
+		/*
+		 * Loop through inode btree records in this ag,
+		 * until we run out of inodes or space in the buffer.
+		 */
+		while (irbp < irbufend && icount < ubcount) {
+			/*
+			 * Loop as long as we're unable to read the
+			 * inode btree.
+			 */
+			while (error) {
+				agino += XFS_INODES_PER_CHUNK;
+				if (XFS_AGINO_TO_AGBNO(mp, agino) >=
+						INT_GET(agi->agi_length, ARCH_CONVERT))
+					break;
+				error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
+							    &tmp);
+			}
+			/*
+			 * If ran off the end of the ag either with an error,
+			 * or the normal way, set end and stop collecting.
+			 */
+			if (error ||
+			    (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
+				    &gfree, &i, ARCH_NOCONVERT)) ||
+			    i == 0) {
+				end_of_ag = 1;
+				break;
+			}
+			/*
+			 * If this chunk has any allocated inodes, save it.
+			 */
+			if (gcnt < XFS_INODES_PER_CHUNK) {
+				INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
+				INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
+				INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
+				irbp++;
+				icount += XFS_INODES_PER_CHUNK - gcnt;
+			}
+			/*
+			 * Set agino to after this chunk and bump the cursor.
+			 */
+			agino = gino + XFS_INODES_PER_CHUNK;
+			error = xfs_inobt_increment(cur, 0, &tmp);
+		}
+		/*
+		 * Drop the btree buffers and the agi buffer.
+		 * We can't hold any of the locks these represent
+		 * when calling iget.
+		 */
+		xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
+		xfs_trans_brelse(tp, agbp);
+		/*
+		 * Now format all the good inodes into the user's buffer.
+		 */
+		irbufend = irbp;
+		for (irbp = irbuf;
+		     irbp < irbufend && ubleft >= statstruct_size; irbp++) {
+			/*
+			 * Read-ahead the next chunk's worth of inodes.
+			 */
+			if (&irbp[1] < irbufend) {
+				/*
+				 * Loop over all clusters in the next chunk.
+				 * Do a readahead if there are any allocated
+				 * inodes in that cluster.
+				 */
+				for (agbno = XFS_AGINO_TO_AGBNO(mp,
+							INT_GET(irbp[1].ir_startino, ARCH_CONVERT)),
+				     chunkidx = 0;
+				     chunkidx < XFS_INODES_PER_CHUNK;
+				     chunkidx += nicluster,
+				     agbno += nbcluster) {
+					if (XFS_INOBT_MASKN(chunkidx,
+							    nicluster) &
+					    ~(INT_GET(irbp[1].ir_free, ARCH_CONVERT)))
+						xfs_btree_reada_bufs(mp, agno,
+							agbno, nbcluster);
+				}
+			}
+			/*
+			 * Now process this chunk of inodes.
+			 */
+			for (agino = INT_GET(irbp->ir_startino, ARCH_CONVERT), chunkidx = 0, clustidx = 0;
+			     ubleft > 0 &&
+				INT_GET(irbp->ir_freecount, ARCH_CONVERT) < XFS_INODES_PER_CHUNK;
+			     chunkidx++, clustidx++, agino++) {
+				ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
+				/*
+				 * Recompute agbno if this is the
+				 * first inode of the cluster.
+				 *
+				 * Careful with clustidx.   There can be
+				 * multple clusters per chunk, a single
+				 * cluster per chunk or a cluster that has
+				 * inodes represented from several different
+				 * chunks (if blocksize is large).
+				 *
+				 * Because of this, the starting clustidx is
+				 * initialized to zero in this loop but must
+				 * later be reset after reading in the cluster
+				 * buffer.
+				 */
+				if ((chunkidx & (nicluster - 1)) == 0) {
+					agbno = XFS_AGINO_TO_AGBNO(mp,
+							INT_GET(irbp->ir_startino, ARCH_CONVERT)) +
+						((chunkidx & nimask) >>
+						 mp->m_sb.sb_inopblog);
+
+					if (flags & BULKSTAT_FG_QUICK) {
+						ino = XFS_AGINO_TO_INO(mp, agno,
+								       agino);
+						bno = XFS_AGB_TO_DADDR(mp, agno,
+								       agbno);
+
+						/*
+						 * Get the inode cluster buffer
+						 */
+						ASSERT(xfs_inode_zone != NULL);
+						ip = kmem_zone_zalloc(xfs_inode_zone,
+								      KM_SLEEP);
+						ip->i_ino = ino;
+						ip->i_mount = mp;
+						if (bp)
+							xfs_trans_brelse(tp, bp);
+						error = xfs_itobp(mp, tp, ip,
+								  &dip, &bp, bno);
+						if (!error)
+							clustidx = ip->i_boffset / mp->m_sb.sb_inodesize;
+						kmem_zone_free(xfs_inode_zone, ip);
+						if (XFS_TEST_ERROR(error != 0,
+								   mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
+								   XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
+							bp = NULL;
+							break;
+						}
+					}
+				}
+				/*
+				 * Skip if this inode is free.
+				 */
+				if (XFS_INOBT_MASK(chunkidx) & INT_GET(irbp->ir_free, ARCH_CONVERT))
+					continue;
+				/*
+				 * Count used inodes as free so we can tell
+				 * when the chunk is used up.
+				 */
+				INT_MOD(irbp->ir_freecount, ARCH_CONVERT, +1);
+				ino = XFS_AGINO_TO_INO(mp, agno, agino);
+				bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
+				if (flags & BULKSTAT_FG_QUICK) {
+					dip = (xfs_dinode_t *)xfs_buf_offset(bp,
+					      (clustidx << mp->m_sb.sb_inodelog));
+
+					if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT)
+						    != XFS_DINODE_MAGIC
+					    || !XFS_DINODE_GOOD_VERSION(
+						    INT_GET(dip->di_core.di_version, ARCH_CONVERT)))
+						continue;
+				}
+
+				/*
+				 * Get the inode and fill in a single buffer.
+				 * BULKSTAT_FG_QUICK uses dip to fill it in.
+				 * BULKSTAT_FG_IGET uses igets.
+				 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
+				 * This is also used to count inodes/blks, etc
+				 * in xfs_qm_quotacheck.
+				 */
+				ubused = statstruct_size;
+				error = formatter(mp, tp, ino, ubufp,
+						ubleft, private_data,
+						bno, &ubused, dip, &fmterror);
+				if (fmterror == BULKSTAT_RV_NOTHING) {
+					if (error == ENOMEM)
+						ubleft = 0;
+					continue;
+				}
+				if (fmterror == BULKSTAT_RV_GIVEUP) {
+					ubleft = 0;
+					ASSERT(error);
+					rval = error;
+					break;
+				}
+				if (ubufp)
+					ubufp += ubused;
+				ubleft -= ubused;
+				ubelem++;
+				lastino = ino;
+			}
+		}
+
+		if (bp)
+			xfs_trans_brelse(tp, bp);
+
+		/*
+		 * Set up for the next loop iteration.
+		 */
+		if (ubleft > 0) {
+			if (end_of_ag) {
+				agno++;
+				agino = 0;
+			} else
+				agino = XFS_INO_TO_AGINO(mp, lastino);
+		} else
+			break;
+	}
+	/*
+	 * Done, we're either out of filesystem or space to put the data.
+	 */
+	kmem_free(irbuf, NBPC);
+#if defined(HAVE_USERACC)
+	if (ubuffer)
+		unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS));
+#endif
+	*ubcountp = ubelem;
+	if (agno >= mp->m_sb.sb_agcount) {
+		/*
+		 * If we ran out of filesystem, mark lastino as off
+		 * the end of the filesystem, so the next call
+		 * will return immediately.
+		 */
+		*lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
+		*done = 1;
+	} else
+		*lastinop = (xfs_ino_t)lastino;
+
+	return rval;
+}
+
+/*
+ * Return stat information in bulk (by-inode) for the filesystem.
+ * Special case for non-sequential one inode bulkstat.
+ */
+int					/* error status */
+xfs_bulkstat_single(
+	xfs_mount_t		*mp,	/* mount point for filesystem */
+	xfs_ino_t		*lastinop, /* inode to return */
+	xfs_caddr_t		buffer,	/* buffer with inode stats */
+	int			*done)	/* 1 if there're more stats to get */
+{
+	xfs_bstat_t		bstat;	/* one bulkstat result structure */
+	int			count;	/* count value for bulkstat call */
+	int			error;	/* return value */
+	xfs_ino_t		ino;	/* filesystem inode number */
+	int			res;	/* result from bs1 */
+
+	/*
+	 * note that requesting valid inode numbers which are not allocated
+	 * to inodes will most likely cause xfs_itobp to generate warning
+	 * messages about bad magic numbers. This is ok. The fact that
+	 * the inode isn't actually an inode is handled by the
+	 * error check below. Done this way to make the usual case faster
+	 * at the expense of the error case.
+	 */
+
+	ino = (xfs_ino_t)*lastinop;
+	error = xfs_bulkstat_one(mp, NULL, ino, &bstat, sizeof(bstat),
+				 NULL, 0, NULL, NULL, &res);
+	if (error) {
+		/*
+		 * Special case way failed, do it the "long" way
+		 * to see if that works.
+		 */
+		(*lastinop)--;
+		count = 1;
+		if (xfs_bulkstat(mp, NULL, lastinop, &count, xfs_bulkstat_one,
+				NULL,
+				sizeof(bstat), buffer, BULKSTAT_FG_IGET, done))
+			return error;
+		if (count == 0 || (xfs_ino_t)*lastinop != ino)
+			return error == EFSCORRUPTED ?
+				XFS_ERROR(EINVAL) : error;
+		else
+			return 0;
+	}
+	*done = 0;
+	if (copy_to_user(buffer, &bstat, sizeof(bstat)))
+		return XFS_ERROR(EFAULT);
+	return 0;
+}
+
+/*
+ * Return inode number table for the filesystem.
+ */
+int					/* error status */
+xfs_inumbers(
+	xfs_mount_t	*mp,		/* mount point for filesystem */
+	xfs_trans_t	*tp,		/* transaction pointer */
+	xfs_ino_t	*lastino,	/* last inode returned */
+	int		*count,		/* size of buffer/count returned */
+	xfs_caddr_t	ubuffer)	/* buffer with inode descriptions */
+{
+	xfs_buf_t	*agbp;
+	xfs_agino_t	agino;
+	xfs_agnumber_t	agno;
+	int		bcount;
+	xfs_inogrp_t	*buffer;
+	int		bufidx;
+	xfs_btree_cur_t	*cur;
+	int		error;
+	__int32_t	gcnt;
+	xfs_inofree_t	gfree;
+	xfs_agino_t	gino;
+	int		i;
+	xfs_ino_t	ino;
+	int		left;
+	int		tmp;
+
+	ino = (xfs_ino_t)*lastino;
+	agno = XFS_INO_TO_AGNO(mp, ino);
+	agino = XFS_INO_TO_AGINO(mp, ino);
+	left = *count;
+	*count = 0;
+	bcount = MIN(left, (int)(NBPP / sizeof(*buffer)));
+	buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
+	error = bufidx = 0;
+	cur = NULL;
+	agbp = NULL;
+	while (left > 0 && agno < mp->m_sb.sb_agcount) {
+		if (agbp == NULL) {
+			down_read(&mp->m_peraglock);
+			error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
+			up_read(&mp->m_peraglock);
+			if (error) {
+				/*
+				 * If we can't read the AGI of this ag,
+				 * then just skip to the next one.
+				 */
+				ASSERT(cur == NULL);
+				agbp = NULL;
+				agno++;
+				agino = 0;
+				continue;
+			}
+			cur = xfs_btree_init_cursor(mp, tp, agbp, agno,
+				XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
+			error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
+			if (error) {
+				xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+				cur = NULL;
+				xfs_trans_brelse(tp, agbp);
+				agbp = NULL;
+				/*
+				 * Move up the the last inode in the current
+				 * chunk.  The lookup_ge will always get
+				 * us the first inode in the next chunk.
+				 */
+				agino += XFS_INODES_PER_CHUNK - 1;
+				continue;
+			}
+		}
+		if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
+			&i, ARCH_NOCONVERT)) ||
+		    i == 0) {
+			xfs_trans_brelse(tp, agbp);
+			agbp = NULL;
+			xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
+			cur = NULL;
+			agno++;
+			agino = 0;
+			continue;
+		}
+		agino = gino + XFS_INODES_PER_CHUNK - 1;
+		buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
+		buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
+		buffer[bufidx].xi_allocmask = ~gfree;
+		bufidx++;
+		left--;
+		if (bufidx == bcount) {
+			if (copy_to_user(ubuffer, buffer,
+					bufidx * sizeof(*buffer))) {
+				error = XFS_ERROR(EFAULT);
+				break;
+			}
+			ubuffer += bufidx * sizeof(*buffer);
+			*count += bufidx;
+			bufidx = 0;
+		}
+		if (left) {
+			error = xfs_inobt_increment(cur, 0, &tmp);
+			if (error) {
+				xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+				cur = NULL;
+				xfs_trans_brelse(tp, agbp);
+				agbp = NULL;
+				/*
+				 * The agino value has already been bumped.
+				 * Just try to skip up to it.
+				 */
+				agino += XFS_INODES_PER_CHUNK;
+				continue;
+			}
+		}
+	}
+	if (!error) {
+		if (bufidx) {
+			if (copy_to_user(ubuffer, buffer,
+					bufidx * sizeof(*buffer)))
+				error = XFS_ERROR(EFAULT);
+			else
+				*count += bufidx;
+		}
+		*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
+	}
+	kmem_free(buffer, bcount * sizeof(*buffer));
+	if (cur)
+		xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
+					   XFS_BTREE_NOERROR));
+	if (agbp)
+		xfs_trans_brelse(tp, agbp);
+	return error;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)