diff options
| -rw-r--r-- | fs/xfs/xfs_alloc.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_alloc.h | 7 | ||||
| -rw-r--r-- | fs/xfs/xfs_discard.c | 61 |
3 files changed, 46 insertions, 24 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 31e90335b83d..0f0df2759b09 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -69,7 +69,7 @@ xfs_alloc_lookup_eq( * Lookup the first record greater than or equal to [bno, len] * in the btree given by cur. */ -STATIC int /* error */ +int /* error */ xfs_alloc_lookup_ge( struct xfs_btree_cur *cur, /* btree cursor */ xfs_agblock_t bno, /* starting block of extent */ diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h index ab5d0fd2f535..3a7e7d8f8ded 100644 --- a/fs/xfs/xfs_alloc.h +++ b/fs/xfs/xfs_alloc.h @@ -248,6 +248,13 @@ xfs_alloc_lookup_le( xfs_extlen_t len, /* length of extent */ int *stat); /* success/failure */ +int /* error */ +xfs_alloc_lookup_ge( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat); /* success/failure */ + int /* error */ xfs_alloc_get_rec( struct xfs_btree_cur *cur, /* btree cursor */ diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c index 286a051f12cf..1ad3a4b8ca40 100644 --- a/fs/xfs/xfs_discard.c +++ b/fs/xfs/xfs_discard.c @@ -37,9 +37,9 @@ STATIC int xfs_trim_extents( struct xfs_mount *mp, xfs_agnumber_t agno, - xfs_fsblock_t start, - xfs_fsblock_t end, - xfs_fsblock_t minlen, + xfs_daddr_t start, + xfs_daddr_t end, + xfs_daddr_t minlen, __uint64_t *blocks_trimmed) { struct block_device *bdev = mp->m_ddev_targp->bt_bdev; @@ -67,7 +67,7 @@ xfs_trim_extents( /* * Look up the longest btree in the AGF and start with it. */ - error = xfs_alloc_lookup_le(cur, 0, + error = xfs_alloc_lookup_ge(cur, 0, be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest), &i); if (error) goto out_del_cursor; @@ -77,8 +77,10 @@ xfs_trim_extents( * enough to be worth discarding. */ while (i) { - xfs_agblock_t fbno; - xfs_extlen_t flen; + xfs_agblock_t fbno; + xfs_extlen_t flen; + xfs_daddr_t dbno; + xfs_extlen_t dlen; error = xfs_alloc_get_rec(cur, &fbno, &flen, &i); if (error) @@ -87,9 +89,17 @@ xfs_trim_extents( ASSERT(flen <= be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_longest)); /* + * use daddr format for all range/len calculations as that is + * the format the range/len variables are supplied in by + * userspace. + */ + dbno = XFS_AGB_TO_DADDR(mp, agno, fbno); + dlen = XFS_FSB_TO_BB(mp, flen); + + /* * Too small? Give up. */ - if (flen < minlen) { + if (dlen < minlen) { trace_xfs_discard_toosmall(mp, agno, fbno, flen); goto out_del_cursor; } @@ -99,8 +109,7 @@ xfs_trim_extents( * 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) > end) { + if (dbno + dlen < start || dbno > end) { trace_xfs_discard_exclude(mp, agno, fbno, flen); goto next_extent; } @@ -115,10 +124,7 @@ xfs_trim_extents( } 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); + error = -blkdev_issue_discard(bdev, dbno, dlen, GFP_NOFS, 0); if (error) goto out_del_cursor; *blocks_trimmed += flen; @@ -137,6 +143,15 @@ out_put_perag: return error; } +/* + * trim a range of the filesystem. + * + * Note: the parameters passed from userspace are byte ranges into the + * filesystem which does not match to the format we use for filesystem block + * addressing. FSB addressing is sparse (AGNO|AGBNO), while the incoming format + * is a linear address range. Hence we need to use DADDR based conversions and + * comparisons for determining the correct offset and regions to trim. + */ int xfs_ioc_trim( struct xfs_mount *mp, @@ -145,7 +160,7 @@ xfs_ioc_trim( 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, end, minlen; + xfs_daddr_t start, end, minlen; xfs_agnumber_t start_agno, end_agno, agno; __uint64_t blocks_trimmed = 0; int error, last_error = 0; @@ -159,22 +174,22 @@ xfs_ioc_trim( /* * Truncating down the len isn't actually quite correct, but using - * XFS_B_TO_FSB would mean we trivially get overflows for values + * BBTOB 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); - end = start + XFS_B_TO_FSBT(mp, range.len) - 1; - minlen = XFS_B_TO_FSB(mp, max_t(u64, granularity, range.minlen)); + start = BTOBB(range.start); + end = start + BTOBBT(range.len) - 1; + minlen = BTOBB(max_t(u64, granularity, range.minlen)); - if (start >= mp->m_sb.sb_dblocks) + if (XFS_BB_TO_FSB(mp, start) >= mp->m_sb.sb_dblocks) return -XFS_ERROR(EINVAL); - if (end > mp->m_sb.sb_dblocks - 1) - end = mp->m_sb.sb_dblocks - 1; + if (end > XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) - 1) + end = XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)- 1; - start_agno = XFS_FSB_TO_AGNO(mp, start); - end_agno = XFS_FSB_TO_AGNO(mp, end); + start_agno = xfs_daddr_to_agno(mp, start); + end_agno = xfs_daddr_to_agno(mp, end); for (agno = start_agno; agno <= end_agno; agno++) { error = -xfs_trim_extents(mp, agno, start, end, minlen, |