fs/jfs: Remove dead code

Since the JFS code was first added to Linux, there has been code hidden
in ifdefs  for some potential future features such as defragmentation
and supporting block sizes other than 4KB. There has been no ongoing
development on JFS for many years, so it's past time to remove this dead
code from the source.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>

1 files changed, 0 insertions, 255 deletions

diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index bb4a342a193d..ae99a7e232ee 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -16,9 +16,6 @@
  * forward references
  */
 static int extBalloc(struct inode *, s64, s64 *, s64 *);
-#ifdef _NOTYET
-static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
-#endif
 static s64 extRoundDown(s64 nb);
 
 #define DPD(a)		(printk("(a): %d\n",(a)))
@@ -177,162 +174,6 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
 	return (0);
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extRealloc()
- *
- * FUNCTION:	extend the allocation of a file extent containing a
- *		partial back last page.
- *
- * PARAMETERS:
- *	ip	- the inode of the file.
- *	cp	- cbuf for the partial backed last page.
- *	xlen	- request size of the resulting extent.
- *	xp	- pointer to an xad. on successful exit, the xad
- *		  describes the newly allocated extent.
- *	abnr	- bool indicating whether the newly allocated extent
- *		  should be marked as allocated but not recorded.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
-{
-	struct super_block *sb = ip->i_sb;
-	s64 xaddr, xlen, nxaddr, delta, xoff;
-	s64 ntail, nextend, ninsert;
-	int rc, nbperpage = JFS_SBI(sb)->nbperpage;
-	int xflag;
-
-	/* This blocks if we are low on resources */
-	txBeginAnon(ip->i_sb);
-
-	mutex_lock(&JFS_IP(ip)->commit_mutex);
-	/* validate extent length */
-	if (nxlen > MAXXLEN)
-		nxlen = MAXXLEN;
-
-	/* get the extend (partial) page's disk block address and
-	 * number of blocks.
-	 */
-	xaddr = addressXAD(xp);
-	xlen = lengthXAD(xp);
-	xoff = offsetXAD(xp);
-
-	/* if the extend page is abnr and if the request is for
-	 * the extent to be allocated and recorded,
-	 * make the page allocated and recorded.
-	 */
-	if ((xp->flag & XAD_NOTRECORDED) && !abnr) {
-		xp->flag = 0;
-		if ((rc = xtUpdate(0, ip, xp)))
-			goto exit;
-	}
-
-	/* try to allocated the request number of blocks for the
-	 * extent.  dbRealloc() first tries to satisfy the request
-	 * by extending the allocation in place. otherwise, it will
-	 * try to allocate a new set of blocks large enough for the
-	 * request.  in satisfying a request, dbReAlloc() may allocate
-	 * less than what was request but will always allocate enough
-	 * space as to satisfy the extend page.
-	 */
-	if ((rc = extBrealloc(ip, xaddr, xlen, &nxlen, &nxaddr)))
-		goto exit;
-
-	/* Allocat blocks to quota. */
-	rc = dquot_alloc_block(ip, nxlen);
-	if (rc) {
-		dbFree(ip, nxaddr, (s64) nxlen);
-		mutex_unlock(&JFS_IP(ip)->commit_mutex);
-		return rc;
-	}
-
-	delta = nxlen - xlen;
-
-	/* check if the extend page is not abnr but the request is abnr
-	 * and the allocated disk space is for more than one page.  if this
-	 * is the case, there is a miss match of abnr between the extend page
-	 * and the one or more pages following the extend page.  as a result,
-	 * two extents will have to be manipulated. the first will be that
-	 * of the extent of the extend page and will be manipulated thru
-	 * an xtExtend() or an xtTailgate(), depending upon whether the
-	 * disk allocation occurred as an inplace extension.  the second
-	 * extent will be manipulated (created) through an xtInsert() and
-	 * will be for the pages following the extend page.
-	 */
-	if (abnr && (!(xp->flag & XAD_NOTRECORDED)) && (nxlen > nbperpage)) {
-		ntail = nbperpage;
-		nextend = ntail - xlen;
-		ninsert = nxlen - nbperpage;
-
-		xflag = XAD_NOTRECORDED;
-	} else {
-		ntail = nxlen;
-		nextend = delta;
-		ninsert = 0;
-
-		xflag = xp->flag;
-	}
-
-	/* if we were able to extend the disk allocation in place,
-	 * extend the extent.  otherwise, move the extent to a
-	 * new disk location.
-	 */
-	if (xaddr == nxaddr) {
-		/* extend the extent */
-		if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
-			dbFree(ip, xaddr + xlen, delta);
-			dquot_free_block(ip, nxlen);
-			goto exit;
-		}
-	} else {
-		/*
-		 * move the extent to a new location:
-		 *
-		 * xtTailgate() accounts for relocated tail extent;
-		 */
-		if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
-			dbFree(ip, nxaddr, nxlen);
-			dquot_free_block(ip, nxlen);
-			goto exit;
-		}
-	}
-
-
-	/* check if we need to also insert a new extent */
-	if (ninsert) {
-		/* perform the insert.  if it fails, free the blocks
-		 * to be inserted and make it appear that we only did
-		 * the xtExtend() or xtTailgate() above.
-		 */
-		xaddr = nxaddr + ntail;
-		if (xtInsert (0, ip, xflag, xoff + ntail, (int) ninsert,
-			      &xaddr, 0)) {
-			dbFree(ip, xaddr, (s64) ninsert);
-			delta = nextend;
-			nxlen = ntail;
-			xflag = 0;
-		}
-	}
-
-	/* set the return results */
-	XADaddress(xp, nxaddr);
-	XADlength(xp, nxlen);
-	XADoffset(xp, xoff);
-	xp->flag = xflag;
-
-	mark_inode_dirty(ip);
-exit:
-	mutex_unlock(&JFS_IP(ip)->commit_mutex);
-	return (rc);
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extHint()
  *
@@ -423,44 +264,6 @@ int extRecord(struct inode *ip, xad_t * xp)
 	return rc;
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extFill()
- *
- * FUNCTION:	allocate disk space for a file page that represents
- *		a file hole.
- *
- * PARAMETERS:
- *	ip	- the inode of the file.
- *	cp	- cbuf of the file page represent the hole.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-int extFill(struct inode *ip, xad_t * xp)
-{
-	int rc, nbperpage = JFS_SBI(ip->i_sb)->nbperpage;
-	s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
-
-//	assert(ISSPARSE(ip));
-
-	/* initialize the extent allocation hint */
-	XADaddress(xp, 0);
-
-	/* allocate an extent to fill the hole */
-	if ((rc = extAlloc(ip, nbperpage, blkno, xp, false)))
-		return (rc);
-
-	assert(lengthPXD(xp) == nbperpage);
-
-	return (0);
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extBalloc()
  *
@@ -550,64 +353,6 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 	return (0);
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extBrealloc()
- *
- * FUNCTION:	attempt to extend an extent's allocation.
- *
- *		Initially, we will try to extend the extent's allocation
- *		in place.  If this fails, we'll try to move the extent
- *		to a new set of blocks.  If moving the extent, we initially
- *		will try to allocate disk blocks for the requested size
- *		(newnblks).  if this fails (new contiguous free blocks not
- *		available), we'll try to allocate a smaller number of
- *		blocks (producing a smaller extent), with this smaller
- *		number of blocks consisting of the requested number of
- *		blocks rounded down to the next smaller power of 2
- *		number (i.e. 16 -> 8).  We'll continue to round down and
- *		retry the allocation until the number of blocks to allocate
- *		is smaller than the number of blocks per page.
- *
- * PARAMETERS:
- *	ip	 - the inode of the file.
- *	blkno	 - starting block number of the extents current allocation.
- *	nblks	 - number of blocks within the extents current allocation.
- *	newnblks - pointer to a s64 value.  on entry, this value is the
- *		   new desired extent size (number of blocks).  on
- *		   successful exit, this value is set to the extent's actual
- *		   new size (new number of blocks).
- *	newblkno - the starting block number of the extents new allocation.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-static int
-extBrealloc(struct inode *ip,
-	    s64 blkno, s64 nblks, s64 * newnblks, s64 * newblkno)
-{
-	int rc;
-
-	/* try to extend in place */
-	if ((rc = dbExtend(ip, blkno, nblks, *newnblks - nblks)) == 0) {
-		*newblkno = blkno;
-		return (0);
-	} else {
-		if (rc != -ENOSPC)
-			return (rc);
-	}
-
-	/* in place extension not possible.
-	 * try to move the extent to a new set of blocks.
-	 */
-	return (extBalloc(ip, blkno, newnblks, newblkno));
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extRoundDown()
  *