1 files changed, 0 insertions, 222 deletions
diff --git a/fs/xfs/linux-2.6/xfs_discard.c b/fs/xfs/linux-2.6/xfs_discard.c
deleted file mode 100644
index 244e797dae32..000000000000
--- a/fs/xfs/linux-2.6/xfs_discard.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * Copyright (C) 2010 Red Hat, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms 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.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#include "xfs.h"
-#include "xfs_sb.h"
-#include "xfs_inum.h"
-#include "xfs_log.h"
-#include "xfs_ag.h"
-#include "xfs_mount.h"
-#include "xfs_quota.h"
-#include "xfs_trans.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_btree.h"
-#include "xfs_inode.h"
-#include "xfs_alloc.h"
-#include "xfs_error.h"
-#include "xfs_discard.h"
-#include "xfs_trace.h"
-
-STATIC int
-xfs_trim_extents(
-	struct xfs_mount	*mp,
-	xfs_agnumber_t		agno,
-	xfs_fsblock_t		start,
-	xfs_fsblock_t		len,
-	xfs_fsblock_t		minlen,
-	__uint64_t		*blocks_trimmed)
-{
-	struct block_device	*bdev = mp->m_ddev_targp->bt_bdev;
-	struct xfs_btree_cur	*cur;
-	struct xfs_buf		*agbp;
-	struct xfs_perag	*pag;
-	int			error;
-	int			i;
-
-	pag = xfs_perag_get(mp, agno);
-
-	error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agbp);
-	if (error || !agbp)
-		goto out_put_perag;
-
-	cur = xfs_allocbt_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_CNT);
-
-	/*
-	 * Force out the log.  This means any transactions that might have freed
-	 * space before we took the AGF buffer lock are now on disk, and the
-	 * volatile disk cache is flushed.
-	 */
-	xfs_log_force(mp, XFS_LOG_SYNC);
-
-	/*
-	 * Look up the longest btree in the AGF and start with it.
-	 */
-	error = xfs_alloc_lookup_le(cur, 0,
-				    XFS_BUF_TO_AGF(agbp)->agf_longest, &i);
-	if (error)
-		goto out_del_cursor;
-
-	/*
-	 * Loop until we are done with all extents that are large
-	 * enough to be worth discarding.
-	 */
-	while (i) {
-		xfs_agblock_t fbno;
-		xfs_extlen_t flen;
-
-		error = xfs_alloc_get_rec(cur, &fbno, &flen, &i);
-		if (error)
-			goto out_del_cursor;
-		XFS_WANT_CORRUPTED_GOTO(i == 1, out_del_cursor);
-		ASSERT(flen <= XFS_BUF_TO_AGF(agbp)->agf_longest);
-
-		/*
-		 * Too small?  Give up.
-		 */
-		if (flen < minlen) {
-			trace_xfs_discard_toosmall(mp, agno, fbno, flen);
-			goto out_del_cursor;
-		}
-
-		/*
-		 * If the extent is entirely outside of the range we are
-		 * supposed to discard skip it.  Do not bother to trim
-		 * down partially overlapping ranges for now.
-		 */
-		if (XFS_AGB_TO_FSB(mp, agno, fbno) + flen < start ||
-		    XFS_AGB_TO_FSB(mp, agno, fbno) >= start + len) {
-			trace_xfs_discard_exclude(mp, agno, fbno, flen);
-			goto next_extent;
-		}
-
-		/*
-		 * If any blocks in the range are still busy, skip the
-		 * discard and try again the next time.
-		 */
-		if (xfs_alloc_busy_search(mp, agno, fbno, flen)) {
-			trace_xfs_discard_busy(mp, agno, fbno, flen);
-			goto next_extent;
-		}
-
-		trace_xfs_discard_extent(mp, agno, fbno, flen);
-		error = -blkdev_issue_discard(bdev,
-				XFS_AGB_TO_DADDR(mp, agno, fbno),
-				XFS_FSB_TO_BB(mp, flen),
-				GFP_NOFS, 0);
-		if (error)
-			goto out_del_cursor;
-		*blocks_trimmed += flen;
-
-next_extent:
-		error = xfs_btree_decrement(cur, 0, &i);
-		if (error)
-			goto out_del_cursor;
-	}
-
-out_del_cursor:
-	xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
-	xfs_buf_relse(agbp);
-out_put_perag:
-	xfs_perag_put(pag);
-	return error;
-}
-
-int
-xfs_ioc_trim(
-	struct xfs_mount		*mp,
-	struct fstrim_range __user	*urange)
-{
-	struct request_queue	*q = mp->m_ddev_targp->bt_bdev->bd_disk->queue;
-	unsigned int		granularity = q->limits.discard_granularity;
-	struct fstrim_range	range;
-	xfs_fsblock_t		start, len, minlen;
-	xfs_agnumber_t		start_agno, end_agno, agno;
-	__uint64_t		blocks_trimmed = 0;
-	int			error, last_error = 0;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
-	if (!blk_queue_discard(q))
-		return -XFS_ERROR(EOPNOTSUPP);
-	if (copy_from_user(&range, urange, sizeof(range)))
-		return -XFS_ERROR(EFAULT);
-
-	/*
-	 * Truncating down the len isn't actually quite correct, but using
-	 * XFS_B_TO_FSB would mean we trivially get overflows for values
-	 * of ULLONG_MAX or slightly lower.  And ULLONG_MAX is the default
-	 * used by the fstrim application.  In the end it really doesn't
-	 * matter as trimming blocks is an advisory interface.
-	 */
-	start = XFS_B_TO_FSBT(mp, range.start);
-	len = XFS_B_TO_FSBT(mp, range.len);
-	minlen = XFS_B_TO_FSB(mp, max_t(u64, granularity, range.minlen));
-
-	start_agno = XFS_FSB_TO_AGNO(mp, start);
-	if (start_agno >= mp->m_sb.sb_agcount)
-		return -XFS_ERROR(EINVAL);
-
-	end_agno = XFS_FSB_TO_AGNO(mp, start + len);
-	if (end_agno >= mp->m_sb.sb_agcount)
-		end_agno = mp->m_sb.sb_agcount - 1;
-
-	for (agno = start_agno; agno <= end_agno; agno++) {
-		error = -xfs_trim_extents(mp, agno, start, len, minlen,
-					  &blocks_trimmed);
-		if (error)
-			last_error = error;
-	}
-
-	if (last_error)
-		return last_error;
-
-	range.len = XFS_FSB_TO_B(mp, blocks_trimmed);
-	if (copy_to_user(urange, &range, sizeof(range)))
-		return -XFS_ERROR(EFAULT);
-	return 0;
-}
-
-int
-xfs_discard_extents(
-	struct xfs_mount	*mp,
-	struct list_head	*list)
-{
-	struct xfs_busy_extent	*busyp;
-	int			error = 0;
-
-	list_for_each_entry(busyp, list, list) {
-		trace_xfs_discard_extent(mp, busyp->agno, busyp->bno,
-					 busyp->length);
-
-		error = -blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
-				XFS_AGB_TO_DADDR(mp, busyp->agno, busyp->bno),
-				XFS_FSB_TO_BB(mp, busyp->length),
-				GFP_NOFS, 0);
-		if (error && error != EOPNOTSUPP) {
-			xfs_info(mp,
-	 "discard failed for extent [0x%llu,%u], error %d",
-				 (unsigned long long)busyp->bno,
-				 busyp->length,
-				 error);
-			return error;
-		}
-	}
-
-	return 0;
-}