From: "Darrick J. Wong" <darrick.wong@oracle.com> To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com, Dave Chinner <dchinner@redhat.com> Subject: [PATCH 19/58] xfs: add an extent to the rmap btree Date: Tue, 06 Oct 2015 21:57:10 -0700 [thread overview] Message-ID: <20151007045710.30457.6962.stgit@birch.djwong.org> (raw) In-Reply-To: <20151007045443.30457.47038.stgit@birch.djwong.org> >From : Dave Chinner <dchinner@redhat.com> Now all the btree, free space and transaction infrastructure is in place, we can finally add the code to insert reverse mappings to the rmap btree. Freeing will be done in a spearate patch, so just the addition operation can be focussed on here. Signed-off-by: Dave Chinner <dchinner@redhat.com> --- fs/xfs/libxfs/xfs_rmap.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+), 1 deletion(-) diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c index f6fe742..d1b6c82 100644 --- a/fs/xfs/libxfs/xfs_rmap.c +++ b/fs/xfs/libxfs/xfs_rmap.c @@ -144,6 +144,18 @@ out_error: return error; } +/* + * When we allocate a new block, the first thing we do is add a reference to the + * extent in the rmap btree. This takes the form of a [agbno, length, owner] + * record. Newly inserted extents should never overlap with an existing extent + * in the rmap btree. Hence the insertion is a relatively trivial exercise, + * involving checking for adjacent records and merging if the new extent is + * contiguous and has the same owner. + * + * Note that we have no MAXEXTLEN limits here when merging as the length in the + * record has the full 32 bits available and hence a single record can track the + * entire space in the AG. + */ int xfs_rmap_alloc( struct xfs_trans *tp, @@ -154,18 +166,143 @@ xfs_rmap_alloc( struct xfs_owner_info *oinfo) { struct xfs_mount *mp = tp->t_mountp; + struct xfs_btree_cur *cur; + struct xfs_rmap_irec ltrec; + struct xfs_rmap_irec gtrec; + int have_gt; int error = 0; + int i; if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) return 0; trace_xfs_rmap_alloc_extent(mp, agno, bno, len, oinfo); - if (1) + cur = xfs_rmapbt_init_cursor(mp, tp, agbp, agno); + + /* + * For the initial lookup, look for and exact match or the left-adjacent + * record for our insertion point. This will also give us the record for + * start block contiguity tests. + */ + error = xfs_rmap_lookup_le(cur, bno, len, owner, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + + error = xfs_rmap_get_rec(cur, <rec, &i); + if (error) goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + //printk("rmalloc ag %d bno 0x%x/0x%x/0x%llx, ltrec 0x%x/0x%x/0x%llx\n", + // agno, bno, len, owner, ltrec.rm_startblock, + // ltrec.rm_blockcount, ltrec.rm_owner); + + XFS_WANT_CORRUPTED_GOTO(mp, + ltrec.rm_startblock + ltrec.rm_blockcount <= bno, out_error); + + /* + * Increment the cursor to see if we have a right-adjacent record to our + * insertion point. This will give us the record for end block + * contiguity tests. + */ + error = xfs_btree_increment(cur, 0, &have_gt); + if (error) + goto out_error; + if (have_gt) { + error = xfs_rmap_get_rec(cur, >rec, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + //printk("rmalloc ag %d bno 0x%x/0x%x/0x%llx, gtrec 0x%x/0x%x/0x%llx\n", + // agno, bno, len, owner, gtrec.rm_startblock, + // gtrec.rm_blockcount, gtrec.rm_owner); + XFS_WANT_CORRUPTED_GOTO(mp, bno + len <= gtrec.rm_startblock, + out_error); + } else { + gtrec.rm_owner = XFS_RMAP_OWN_NULL; + } + + /* + * Note: cursor currently points one record to the right of ltrec, even + * if there is no record in the tree to the right. + */ + if (ltrec.rm_owner == owner && + ltrec.rm_startblock + ltrec.rm_blockcount == bno) { + /* + * left edge contiguous, merge into left record. + * + * ltbno ltlen + * orig: |ooooooooo| + * adding: |aaaaaaaaa| + * result: |rrrrrrrrrrrrrrrrrrr| + * bno len + */ + //printk("add left\n"); + ltrec.rm_blockcount += len; + if (gtrec.rm_owner == owner && + bno + len == gtrec.rm_startblock) { + //printk("add middle\n"); + /* + * right edge also contiguous, delete right record + * and merge into left record. + * + * ltbno ltlen gtbno gtlen + * orig: |ooooooooo| |ooooooooo| + * adding: |aaaaaaaaa| + * result: |rrrrrrrrrrrrrrrrrrrrrrrrrrrrr| + */ + ltrec.rm_blockcount += gtrec.rm_blockcount; + error = xfs_btree_delete(cur, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + } + + /* point the cursor back to the left record and update */ + error = xfs_btree_decrement(cur, 0, &have_gt); + if (error) + goto out_error; + error = xfs_rmap_update(cur, <rec); + if (error) + goto out_error; + } else if (gtrec.rm_owner == owner && + bno + len == gtrec.rm_startblock) { + /* + * right edge contiguous, merge into right record. + * + * gtbno gtlen + * Orig: |ooooooooo| + * adding: |aaaaaaaaa| + * Result: |rrrrrrrrrrrrrrrrrrr| + * bno len + */ + //printk("add right\n"); + gtrec.rm_startblock = bno; + gtrec.rm_blockcount += len; + error = xfs_rmap_update(cur, >rec); + if (error) + goto out_error; + } else { + //printk("add no match\n"); + /* + * no contiguous edge with identical owner, insert + * new record at current cursor position. + */ + cur->bc_rec.r.rm_startblock = bno; + cur->bc_rec.r.rm_blockcount = len; + cur->bc_rec.r.rm_owner = owner; + error = xfs_btree_insert(cur, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + } + trace_xfs_rmap_alloc_extent_done(mp, agno, bno, len, oinfo); + xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); return 0; out_error: trace_xfs_rmap_alloc_extent_error(mp, agno, bno, len, oinfo); + xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); return error; }
WARNING: multiple messages have this Message-ID (diff)
From: "Darrick J. Wong" <darrick.wong@oracle.com> To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-fsdevel@vger.kernel.org, Dave Chinner <dchinner@redhat.com>, xfs@oss.sgi.com Subject: [PATCH 19/58] xfs: add an extent to the rmap btree Date: Tue, 06 Oct 2015 21:57:10 -0700 [thread overview] Message-ID: <20151007045710.30457.6962.stgit@birch.djwong.org> (raw) In-Reply-To: <20151007045443.30457.47038.stgit@birch.djwong.org> >From : Dave Chinner <dchinner@redhat.com> Now all the btree, free space and transaction infrastructure is in place, we can finally add the code to insert reverse mappings to the rmap btree. Freeing will be done in a spearate patch, so just the addition operation can be focussed on here. Signed-off-by: Dave Chinner <dchinner@redhat.com> --- fs/xfs/libxfs/xfs_rmap.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+), 1 deletion(-) diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c index f6fe742..d1b6c82 100644 --- a/fs/xfs/libxfs/xfs_rmap.c +++ b/fs/xfs/libxfs/xfs_rmap.c @@ -144,6 +144,18 @@ out_error: return error; } +/* + * When we allocate a new block, the first thing we do is add a reference to the + * extent in the rmap btree. This takes the form of a [agbno, length, owner] + * record. Newly inserted extents should never overlap with an existing extent + * in the rmap btree. Hence the insertion is a relatively trivial exercise, + * involving checking for adjacent records and merging if the new extent is + * contiguous and has the same owner. + * + * Note that we have no MAXEXTLEN limits here when merging as the length in the + * record has the full 32 bits available and hence a single record can track the + * entire space in the AG. + */ int xfs_rmap_alloc( struct xfs_trans *tp, @@ -154,18 +166,143 @@ xfs_rmap_alloc( struct xfs_owner_info *oinfo) { struct xfs_mount *mp = tp->t_mountp; + struct xfs_btree_cur *cur; + struct xfs_rmap_irec ltrec; + struct xfs_rmap_irec gtrec; + int have_gt; int error = 0; + int i; if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) return 0; trace_xfs_rmap_alloc_extent(mp, agno, bno, len, oinfo); - if (1) + cur = xfs_rmapbt_init_cursor(mp, tp, agbp, agno); + + /* + * For the initial lookup, look for and exact match or the left-adjacent + * record for our insertion point. This will also give us the record for + * start block contiguity tests. + */ + error = xfs_rmap_lookup_le(cur, bno, len, owner, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + + error = xfs_rmap_get_rec(cur, <rec, &i); + if (error) goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + //printk("rmalloc ag %d bno 0x%x/0x%x/0x%llx, ltrec 0x%x/0x%x/0x%llx\n", + // agno, bno, len, owner, ltrec.rm_startblock, + // ltrec.rm_blockcount, ltrec.rm_owner); + + XFS_WANT_CORRUPTED_GOTO(mp, + ltrec.rm_startblock + ltrec.rm_blockcount <= bno, out_error); + + /* + * Increment the cursor to see if we have a right-adjacent record to our + * insertion point. This will give us the record for end block + * contiguity tests. + */ + error = xfs_btree_increment(cur, 0, &have_gt); + if (error) + goto out_error; + if (have_gt) { + error = xfs_rmap_get_rec(cur, >rec, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + //printk("rmalloc ag %d bno 0x%x/0x%x/0x%llx, gtrec 0x%x/0x%x/0x%llx\n", + // agno, bno, len, owner, gtrec.rm_startblock, + // gtrec.rm_blockcount, gtrec.rm_owner); + XFS_WANT_CORRUPTED_GOTO(mp, bno + len <= gtrec.rm_startblock, + out_error); + } else { + gtrec.rm_owner = XFS_RMAP_OWN_NULL; + } + + /* + * Note: cursor currently points one record to the right of ltrec, even + * if there is no record in the tree to the right. + */ + if (ltrec.rm_owner == owner && + ltrec.rm_startblock + ltrec.rm_blockcount == bno) { + /* + * left edge contiguous, merge into left record. + * + * ltbno ltlen + * orig: |ooooooooo| + * adding: |aaaaaaaaa| + * result: |rrrrrrrrrrrrrrrrrrr| + * bno len + */ + //printk("add left\n"); + ltrec.rm_blockcount += len; + if (gtrec.rm_owner == owner && + bno + len == gtrec.rm_startblock) { + //printk("add middle\n"); + /* + * right edge also contiguous, delete right record + * and merge into left record. + * + * ltbno ltlen gtbno gtlen + * orig: |ooooooooo| |ooooooooo| + * adding: |aaaaaaaaa| + * result: |rrrrrrrrrrrrrrrrrrrrrrrrrrrrr| + */ + ltrec.rm_blockcount += gtrec.rm_blockcount; + error = xfs_btree_delete(cur, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + } + + /* point the cursor back to the left record and update */ + error = xfs_btree_decrement(cur, 0, &have_gt); + if (error) + goto out_error; + error = xfs_rmap_update(cur, <rec); + if (error) + goto out_error; + } else if (gtrec.rm_owner == owner && + bno + len == gtrec.rm_startblock) { + /* + * right edge contiguous, merge into right record. + * + * gtbno gtlen + * Orig: |ooooooooo| + * adding: |aaaaaaaaa| + * Result: |rrrrrrrrrrrrrrrrrrr| + * bno len + */ + //printk("add right\n"); + gtrec.rm_startblock = bno; + gtrec.rm_blockcount += len; + error = xfs_rmap_update(cur, >rec); + if (error) + goto out_error; + } else { + //printk("add no match\n"); + /* + * no contiguous edge with identical owner, insert + * new record at current cursor position. + */ + cur->bc_rec.r.rm_startblock = bno; + cur->bc_rec.r.rm_blockcount = len; + cur->bc_rec.r.rm_owner = owner; + error = xfs_btree_insert(cur, &i); + if (error) + goto out_error; + XFS_WANT_CORRUPTED_GOTO(mp, i == 1, out_error); + } + trace_xfs_rmap_alloc_extent_done(mp, agno, bno, len, oinfo); + xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); return 0; out_error: trace_xfs_rmap_alloc_extent_error(mp, agno, bno, len, oinfo); + xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); return error; } _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2015-10-07 4:57 UTC|newest] Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-10-07 4:54 [RFCv3 00/58] xfs: add reverse-mapping, reflink, and dedupe support Darrick J. Wong 2015-10-07 4:54 ` Darrick J. Wong 2015-10-07 4:54 ` [PATCH 01/58] libxfs: make xfs_alloc_fix_freelist non-static Darrick J. Wong 2015-10-07 4:54 ` Darrick J. Wong 2015-10-07 4:54 ` [PATCH 02/58] xfs: fix log ticket type printing Darrick J. Wong 2015-10-07 4:54 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 03/58] xfs: introduce rmap btree definitions Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 04/58] xfs: add rmap btree stats infrastructure Darrick J. Wong 2015-10-07 4:55 ` [PATCH 05/58] xfs: rmap btree add more reserved blocks Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 06/58] xfs: add owner field to extent allocation and freeing Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 07/58] xfs: add extended " Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 08/58] xfs: introduce rmap extent operation stubs Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 09/58] xfs: extend rmap extent operation stubs to take full owner info Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 10/58] xfs: define the on-disk rmap btree format Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:55 ` [PATCH 11/58] xfs: enhance " Darrick J. Wong 2015-10-07 4:55 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 12/58] xfs: add rmap btree growfs support Darrick J. Wong 2015-10-07 4:56 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 13/58] xfs: enhance " Darrick J. Wong 2015-10-07 4:56 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 14/58] xfs: rmap btree transaction reservations Darrick J. Wong 2015-10-07 4:56 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 15/58] xfs: rmap btree requires more reserved free space Darrick J. Wong 2015-10-07 4:56 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 16/58] libxfs: fix min freelist length calculation Darrick J. Wong 2015-10-07 4:56 ` Darrick J. Wong 2015-10-07 4:56 ` [PATCH 17/58] xfs: add rmap btree operations Darrick J. Wong 2015-10-07 4:57 ` [PATCH 18/58] xfs: enhance " Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong [this message] 2015-10-07 4:57 ` [PATCH 19/58] xfs: add an extent to the rmap btree Darrick J. Wong 2015-10-07 4:57 ` [PATCH 20/58] xfs: add tracepoints for the rmap-mirrors-bmbt functions Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 21/58] xfs: teach rmap_alloc how to deal with our larger rmap btree Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 22/58] xfs: remove an extent from the " Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 23/58] xfs: enhanced " Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 24/58] xfs: add rmap btree insert and delete helpers Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 25/58] xfs: bmap btree changes should update rmap btree Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-21 21:39 ` Darrick J. Wong 2015-10-21 21:39 ` Darrick J. Wong 2015-10-07 4:57 ` [PATCH 26/58] xfs: add rmap btree geometry feature flag Darrick J. Wong 2015-10-07 4:57 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 27/58] xfs: add rmap btree block detection to log recovery Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 28/58] xfs: enable the rmap btree functionality Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 29/58] xfs: disable XFS_IOC_SWAPEXT when rmap btree is enabled Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 30/58] xfs: implement " Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 31/58] libxfs: refactor short btree block verification Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 32/58] xfs: don't update rmapbt when fixing agfl Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 33/58] xfs: introduce refcount btree definitions Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 34/58] xfs: add refcount btree stats infrastructure Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:58 ` [PATCH 35/58] xfs: refcount btree add more reserved blocks Darrick J. Wong 2015-10-07 4:58 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 36/58] xfs: define the on-disk refcount btree format Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 37/58] xfs: define tracepoints for refcount/reflink activities Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 38/58] xfs: add refcount btree support to growfs Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 39/58] xfs: add refcount btree operations Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 40/58] libxfs: adjust refcount of an extent of blocks in refcount btree Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-27 19:05 ` Darrick J. Wong 2015-10-27 19:05 ` Darrick J. Wong 2015-10-30 20:56 ` Darrick J. Wong 2015-10-30 20:56 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 41/58] libxfs: adjust refcount when unmapping file blocks Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 42/58] xfs: add refcount btree block detection to log recovery Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 43/58] xfs: map an inode's offset to an exact physical block Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 4:59 ` [PATCH 44/58] xfs: add reflink feature flag to geometry Darrick J. Wong 2015-10-07 4:59 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 45/58] xfs: create a separate workqueue for copy-on-write activities Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 46/58] xfs: implement copy-on-write for reflinked blocks Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 47/58] xfs: handle directio " Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 48/58] xfs: copy-on-write reflinked blocks when zeroing ranges of blocks Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-21 21:17 ` Darrick J. Wong 2015-10-21 21:17 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 49/58] xfs: clear inode reflink flag when freeing blocks Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 50/58] xfs: reflink extents from one file to another Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:12 ` kbuild test robot 2015-10-07 5:12 ` kbuild test robot 2015-10-07 5:00 ` [PATCH 51/58] xfs: add clone file and clone range ioctls Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:13 ` kbuild test robot 2015-10-07 5:13 ` kbuild test robot 2015-10-07 6:46 ` kbuild test robot 2015-10-07 6:46 ` kbuild test robot 2015-10-07 7:35 ` kbuild test robot 2015-10-07 7:35 ` kbuild test robot 2015-10-07 5:00 ` [PATCH 52/58] xfs: emulate the btrfs dedupe extent same ioctl Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:00 ` [PATCH 53/58] xfs: teach fiemap about reflink'd extents Darrick J. Wong 2015-10-07 5:00 ` Darrick J. Wong 2015-10-07 5:01 ` [PATCH 54/58] xfs: swap inode reflink flags when swapping inode extents Darrick J. Wong 2015-10-07 5:01 ` Darrick J. Wong 2015-10-07 5:01 ` [PATCH 55/58] vfs: add a FALLOC_FL_UNSHARE mode to fallocate to unshare a range of blocks Darrick J. Wong 2015-10-07 5:01 ` Darrick J. Wong 2015-10-07 5:01 ` [PATCH 56/58] xfs: unshare a range of blocks via fallocate Darrick J. Wong 2015-10-07 5:01 ` Darrick J. Wong 2015-10-07 5:01 ` [PATCH 57/58] xfs: support XFS_XFLAG_REFLINK (and FS_NOCOW_FL) on reflink filesystems Darrick J. Wong 2015-10-07 5:01 ` Darrick J. Wong 2015-10-07 5:01 ` [PATCH 58/58] xfs: recognize the reflink feature bit Darrick J. Wong 2015-10-07 5:01 ` Darrick J. Wong
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