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Signed-off-by: John Garry --- include/linux/fs.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 069cbab62700..e13d34f8c24e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3645,4 +3645,16 @@ bool generic_atomic_write_valid(loff_t pos, struct iov_iter *iter) return true; } +static inline +bool generic_atomic_write_valid_size(loff_t pos, struct iov_iter *iter, + unsigned int unit_min, unsigned int unit_max) +{ + size_t len = iov_iter_count(iter); + + if (len < unit_min || len > unit_max) + return false; + + return generic_atomic_write_valid(pos, iter); +} + #endif /* _LINUX_FS_H */ From patchwork Fri Jun 7 14:38:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690193 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 00721C27C53 for ; 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The value in io_block_size does not have to be a power-of-2, so fix up zeroing code to handle that. Signed-off-by: John Garry --- block/fops.c | 1 + fs/btrfs/inode.c | 1 + fs/erofs/data.c | 1 + fs/erofs/zmap.c | 1 + fs/ext2/inode.c | 1 + fs/ext4/extents.c | 1 + fs/ext4/inode.c | 1 + fs/f2fs/data.c | 1 + fs/fuse/dax.c | 1 + fs/gfs2/bmap.c | 1 + fs/hpfs/file.c | 1 + fs/iomap/direct-io.c | 23 +++++++++++++++++++---- fs/xfs/xfs_iomap.c | 1 + fs/zonefs/file.c | 2 ++ include/linux/iomap.h | 2 ++ 15 files changed, 35 insertions(+), 4 deletions(-) diff --git a/block/fops.c b/block/fops.c index 9d6d86ebefb9..020443078630 100644 --- a/block/fops.c +++ b/block/fops.c @@ -402,6 +402,7 @@ static int blkdev_iomap_begin(struct inode *inode, loff_t offset, loff_t length, iomap->addr = iomap->offset; iomap->length = isize - iomap->offset; iomap->flags |= IOMAP_F_BUFFER_HEAD; /* noop for !CONFIG_BUFFER_HEAD */ + iomap->io_block_size = i_blocksize(inode); return 0; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 753db965f7c0..665811b1578b 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7740,6 +7740,7 @@ static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start, iomap->offset = start; iomap->bdev = fs_info->fs_devices->latest_dev->bdev; iomap->length = len; + iomap->io_block_size = i_blocksize(inode); free_extent_map(em); return 0; diff --git a/fs/erofs/data.c b/fs/erofs/data.c index 8be60797ea2f..ea9d2f3eadb3 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -305,6 +305,7 @@ static int erofs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, if (flags & IOMAP_DAX) iomap->addr += mdev.m_dax_part_off; } + iomap->io_block_size = i_blocksize(inode); return 0; } diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c index 9b248ee5fef2..6ee89f6a078c 100644 --- a/fs/erofs/zmap.c +++ b/fs/erofs/zmap.c @@ -749,6 +749,7 @@ static int z_erofs_iomap_begin_report(struct inode *inode, loff_t offset, if (iomap->offset >= inode->i_size) iomap->length = length + offset - map.m_la; } + iomap->io_block_size = i_blocksize(inode); iomap->flags = 0; return 0; } diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 0caa1650cee8..7a5539a52844 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -862,6 +862,7 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length, iomap->length = (u64)ret << blkbits; iomap->flags |= IOMAP_F_MERGED; } + iomap->io_block_size = i_blocksize(inode); if (new) iomap->flags |= IOMAP_F_NEW; diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e067f2dd0335..ce3269874fde 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4933,6 +4933,7 @@ static int ext4_iomap_xattr_fiemap(struct inode *inode, struct iomap *iomap) iomap->length = length; iomap->type = iomap_type; iomap->flags = 0; + iomap->io_block_size = i_blocksize(inode); out: return error; } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 4bae9ccf5fe0..3ec82e4d71c4 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3235,6 +3235,7 @@ static void ext4_set_iomap(struct inode *inode, struct iomap *iomap, iomap->bdev = inode->i_sb->s_bdev; iomap->offset = (u64) map->m_lblk << blkbits; iomap->length = (u64) map->m_len << blkbits; + iomap->io_block_size = i_blocksize(inode); if ((map->m_flags & EXT4_MAP_MAPPED) && !ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b9b0debc6b3d..6c12641b9a7b 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -4233,6 +4233,7 @@ static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, } iomap->addr = IOMAP_NULL_ADDR; } + iomap->io_block_size = i_blocksize(inode); if (map.m_flags & F2FS_MAP_NEW) iomap->flags |= IOMAP_F_NEW; diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index 12ef91d170bb..68ddc74cb31e 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -577,6 +577,7 @@ static int fuse_iomap_begin(struct inode *inode, loff_t pos, loff_t length, iomap->flags = 0; iomap->bdev = NULL; iomap->dax_dev = fc->dax->dev; + iomap->io_block_size = i_blocksize(inode); /* * Both read/write and mmap path can race here. So we need something diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 1795c4e8dbf6..8d2de42b1da9 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -927,6 +927,7 @@ static int __gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length, out: iomap->bdev = inode->i_sb->s_bdev; + iomap->io_block_size = i_blocksize(inode); unlock: up_read(&ip->i_rw_mutex); return ret; diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c index 1bb8d97cd9ae..5d2718faf520 100644 --- a/fs/hpfs/file.c +++ b/fs/hpfs/file.c @@ -149,6 +149,7 @@ static int hpfs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, iomap->addr = IOMAP_NULL_ADDR; iomap->length = 1 << blkbits; } + iomap->io_block_size = i_blocksize(inode); hpfs_unlock(sb); return 0; diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index f3b43d223a46..5be8d886ab4a 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -277,7 +277,7 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, { const struct iomap *iomap = &iter->iomap; struct inode *inode = iter->inode; - unsigned int fs_block_size = i_blocksize(inode), pad; + u64 io_block_size = iomap->io_block_size; loff_t length = iomap_length(iter); loff_t pos = iter->pos; blk_opf_t bio_opf; @@ -287,6 +287,7 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, int nr_pages, ret = 0; size_t copied = 0; size_t orig_count; + unsigned int pad; if ((pos | length) & (bdev_logical_block_size(iomap->bdev) - 1) || !bdev_iter_is_aligned(iomap->bdev, dio->submit.iter)) @@ -355,7 +356,14 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, if (need_zeroout) { /* zero out from the start of the block to the write offset */ - pad = pos & (fs_block_size - 1); + if (is_power_of_2(io_block_size)) { + pad = pos & (io_block_size - 1); + } else { + loff_t _pos = pos; + + pad = do_div(_pos, io_block_size); + } + if (pad) iomap_dio_zero(iter, dio, pos - pad, pad); } @@ -429,9 +437,16 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, if (need_zeroout || ((dio->flags & IOMAP_DIO_WRITE) && pos >= i_size_read(inode))) { /* zero out from the end of the write to the end of the block */ - pad = pos & (fs_block_size - 1); + if (is_power_of_2(io_block_size)) { + pad = pos & (io_block_size - 1); + } else { + loff_t _pos = pos; + + pad = do_div(_pos, io_block_size); + } + if (pad) - iomap_dio_zero(iter, dio, pos, fs_block_size - pad); + iomap_dio_zero(iter, dio, pos, io_block_size - pad); } out: /* Undo iter limitation to current extent */ diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 378342673925..ecb4cae88248 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -127,6 +127,7 @@ xfs_bmbt_to_iomap( } iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff); iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount); + iomap->io_block_size = i_blocksize(VFS_I(ip)); if (mapping_flags & IOMAP_DAX) iomap->dax_dev = target->bt_daxdev; else diff --git a/fs/zonefs/file.c b/fs/zonefs/file.c index 3b103715acc9..bf2cc4bee309 100644 --- a/fs/zonefs/file.c +++ b/fs/zonefs/file.c @@ -50,6 +50,7 @@ static int zonefs_read_iomap_begin(struct inode *inode, loff_t offset, iomap->addr = (z->z_sector << SECTOR_SHIFT) + iomap->offset; iomap->length = isize - iomap->offset; } + iomap->io_block_size = i_blocksize(inode); mutex_unlock(&zi->i_truncate_mutex); trace_zonefs_iomap_begin(inode, iomap); @@ -99,6 +100,7 @@ static int zonefs_write_iomap_begin(struct inode *inode, loff_t offset, iomap->type = IOMAP_MAPPED; iomap->length = isize - iomap->offset; } + iomap->io_block_size = i_blocksize(inode); mutex_unlock(&zi->i_truncate_mutex); trace_zonefs_iomap_begin(inode, iomap); diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 6fc1c858013d..d63a35b77907 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -103,6 +103,8 @@ struct iomap { void *private; /* filesystem private */ const struct iomap_folio_ops *folio_ops; u64 validity_cookie; /* used with .iomap_valid() */ + /* io block zeroing size, not necessarily a power-of-2 */ + u64 io_block_size; }; static inline sector_t iomap_sector(const struct iomap *iomap, loff_t pos) From patchwork Fri Jun 7 14:39:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690195 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0D05EC27C6E for ; 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Expand the sub-fs block size zeroing to now cover RT extents, by calling setting iomap->io_block_size as xfs_inode_alloc_unitsize(). In xfs_iomap_write_unwritten(), update the unwritten range fsb to cover this extent granularity. In xfs_file_dio_write(), handle a write which is not aligned to extent size granularity as unaligned. Since the extent size granularity need not be a power-of-2, handle this also. Signed-off-by: John Garry --- fs/xfs/xfs_file.c | 24 +++++++++++++++++++----- fs/xfs/xfs_inode.c | 17 +++++++++++------ fs/xfs/xfs_inode.h | 1 + fs/xfs/xfs_iomap.c | 8 +++++++- 4 files changed, 38 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index b240ea5241dc..24fe3c2e03da 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -601,7 +601,7 @@ xfs_file_dio_write_aligned( } /* - * Handle block unaligned direct I/O writes + * Handle unaligned direct IO writes. * * In most cases direct I/O writes will be done holding IOLOCK_SHARED, allowing * them to be done in parallel with reads and other direct I/O writes. However, @@ -630,9 +630,9 @@ xfs_file_dio_write_unaligned( ssize_t ret; /* - * Extending writes need exclusivity because of the sub-block zeroing - * that the DIO code always does for partial tail blocks beyond EOF, so - * don't even bother trying the fast path in this case. + * Extending writes need exclusivity because of the sub-block/extent + * zeroing that the DIO code always does for partial tail blocks + * beyond EOF, so don't even bother trying the fast path in this case. */ if (iocb->ki_pos > isize || iocb->ki_pos + count >= isize) { if (iocb->ki_flags & IOCB_NOWAIT) @@ -698,11 +698,25 @@ xfs_file_dio_write( struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); struct xfs_buftarg *target = xfs_inode_buftarg(ip); size_t count = iov_iter_count(from); + bool unaligned; + u64 unitsize; /* direct I/O must be aligned to device logical sector size */ if ((iocb->ki_pos | count) & target->bt_logical_sectormask) return -EINVAL; - if ((iocb->ki_pos | count) & ip->i_mount->m_blockmask) + + unitsize = xfs_inode_alloc_unitsize(ip); + if (!is_power_of_2(unitsize)) { + if (isaligned_64(iocb->ki_pos, unitsize) && + isaligned_64(count, unitsize)) + unaligned = false; + else + unaligned = true; + } else { + unaligned = (iocb->ki_pos | count) & (unitsize - 1); + } + + if (unaligned) return xfs_file_dio_write_unaligned(ip, iocb, from); return xfs_file_dio_write_aligned(ip, iocb, from); } diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 58fb7a5062e1..93ad442f399b 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -4264,15 +4264,20 @@ xfs_break_layouts( return error; } -/* Returns the size of fundamental allocation unit for a file, in bytes. */ unsigned int -xfs_inode_alloc_unitsize( +xfs_inode_alloc_unitsize_fsb( struct xfs_inode *ip) { - unsigned int blocks = 1; - if (XFS_IS_REALTIME_INODE(ip)) - blocks = ip->i_mount->m_sb.sb_rextsize; + return ip->i_mount->m_sb.sb_rextsize; + + return 1; +} - return XFS_FSB_TO_B(ip->i_mount, blocks); +/* Returns the size of fundamental allocation unit for a file, in bytes. */ +unsigned int +xfs_inode_alloc_unitsize( + struct xfs_inode *ip) +{ + return XFS_FSB_TO_B(ip->i_mount, xfs_inode_alloc_unitsize_fsb(ip)); } diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 292b90b5f2ac..90d2fa837117 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -643,6 +643,7 @@ int xfs_inode_reload_unlinked(struct xfs_inode *ip); bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork); void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, xfs_filblks_t *dblocks, xfs_filblks_t *rblocks); +unsigned int xfs_inode_alloc_unitsize_fsb(struct xfs_inode *ip); unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip); struct xfs_dir_update_params { diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index ecb4cae88248..fbe69f747e30 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -127,7 +127,7 @@ xfs_bmbt_to_iomap( } iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff); iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount); - iomap->io_block_size = i_blocksize(VFS_I(ip)); + iomap->io_block_size = xfs_inode_alloc_unitsize(ip); if (mapping_flags & IOMAP_DAX) iomap->dax_dev = target->bt_daxdev; else @@ -577,11 +577,17 @@ xfs_iomap_write_unwritten( xfs_fsize_t i_size; uint resblks; int error; + unsigned int rounding; trace_xfs_unwritten_convert(ip, offset, count); offset_fsb = XFS_B_TO_FSBT(mp, offset); count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); + rounding = xfs_inode_alloc_unitsize_fsb(ip); + if (rounding > 1) { + offset_fsb = rounddown_64(offset_fsb, rounding); + count_fsb = roundup_64(count_fsb, rounding); + } count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); /* From patchwork Fri Jun 7 14:39:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690188 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 81A65C27C53 for ; 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However, this function has only checked that there is enough contiguous free space for an aligned args->minlen allocation to succeed. Hence there is no guarantee that an args->maxlen allocation will succeed, nor that the available space will allow for correct alignment of an args->maxlen allocation. Further, by trimming args->maxlen arbitrarily, it breaks an assumption made in xfs_alloc_fix_len() that if the caller wants aligned allocation, then args->maxlen will be set to an aligned value. It then skips the tail alignment and so we end up with extents that aren't aligned to extent size hint boundaries as we approach ENOSPC. To avoid this problem, don't reduce args->maxlen by some random, arbitrary amount. If args->maxlen is too large for the available space, reduce the allocation to a minlen allocation as we know we have contiguous free space available for this to succeed and always be correctly aligned. Signed-off-by: Dave Chinner Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_alloc.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 6c55a6e88eba..5855a21d4864 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2409,14 +2409,23 @@ xfs_alloc_space_available( if (available < (int)max(args->total, alloc_len)) return false; + if (flags & XFS_ALLOC_FLAG_CHECK) + return true; + /* - * Clamp maxlen to the amount of free space available for the actual - * extent allocation. + * If we can't do a maxlen allocation, then we must reduce the size of + * the allocation to match the available free space. We know how big + * the largest contiguous free space we can allocate is, so that's our + * upper bound. However, we don't exaclty know what alignment/size + * constraints have been placed on the allocation, so we can't + * arbitrarily select some new max size. Hence make this a minlen + * allocation as we know that will definitely succeed and match the + * callers alignment constraints. */ - if (available < (int)args->maxlen && !(flags & XFS_ALLOC_FLAG_CHECK)) { - args->maxlen = available; + alloc_len = args->maxlen + (args->alignment - 1) + args->minalignslop; + if (longest < alloc_len) { + args->maxlen = args->minlen; ASSERT(args->maxlen > 0); - ASSERT(args->maxlen >= args->minlen); } return true; From patchwork Fri Jun 7 14:39:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690192 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6F5B0C27C5F for ; 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However, this assumes that nothing modifies args->maxlen between the original allocation context setup and trimming the selected free space extent to size. This assumption has recently been found to be invalid - xfs_alloc_space_available() modifies args->maxlen in low space situations - and there may be more situations we haven't yet found like this. Force aligned allocation introduces the requirement that extents are correctly tail aligned, resulting in this occasional latent alignment failure to e reclassified from an unimportant curiousity to a must-fix bug. Removing the assumption about args->maxlen allocations always being tail aligned is trivial, and should not impact anything because args->maxlen for inodes with extent size hints configured are already aligned. Hence all this change does it avoid weird corner cases that would have resulted in unaligned extent sizes by always trimming the extent down to an aligned size. Signed-off-by: Dave Chinner Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_alloc.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 5855a21d4864..32f72217c126 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -432,20 +432,18 @@ xfs_alloc_compute_diff( * Fix up the length, based on mod and prod. * len should be k * prod + mod for some k. * If len is too small it is returned unchanged. - * If len hits maxlen it is left alone. */ -STATIC void +static void xfs_alloc_fix_len( - xfs_alloc_arg_t *args) /* allocation argument structure */ + struct xfs_alloc_arg *args) { - xfs_extlen_t k; - xfs_extlen_t rlen; + xfs_extlen_t k; + xfs_extlen_t rlen = args->len; ASSERT(args->mod < args->prod); - rlen = args->len; ASSERT(rlen >= args->minlen); ASSERT(rlen <= args->maxlen); - if (args->prod <= 1 || rlen < args->mod || rlen == args->maxlen || + if (args->prod <= 1 || rlen < args->mod || (args->mod == 0 && rlen < args->prod)) return; 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That is specified by an external parameter to the allocation code, which then manipulates the xfs_alloc_args alignment configuration in interesting ways. The args->alignment field specifies extent start alignment, but because we may be attempting non-aligned allocation first there are also slop variables that allow for those allocation attempts to account for aligned allocation if they fail. This gets much more complex as we introduce forced allocation alignment, where extent size hints are used to generate the extent start alignment. extent size hints currently only affect extent lengths (via args->prod and args->mod) and so with this change we will have two different start alignment conditions. Avoid this complexity by always using args->alignment to indicate extent start alignment, and always using args->prod/mod to indicate extent length adjustment. Signed-off-by: Dave Chinner jpg: fixup alignslop references in xfs_trace.h and xfs_ialloc.c Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_alloc.c | 4 +- fs/xfs/libxfs/xfs_alloc.h | 2 +- fs/xfs/libxfs/xfs_bmap.c | 96 +++++++++++++++++--------------------- fs/xfs/libxfs/xfs_ialloc.c | 10 ++-- fs/xfs/xfs_trace.h | 8 ++-- 5 files changed, 54 insertions(+), 66 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 32f72217c126..35fbd6b19682 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2391,7 +2391,7 @@ xfs_alloc_space_available( reservation = xfs_ag_resv_needed(pag, args->resv); /* do we have enough contiguous free space for the allocation? */ - alloc_len = args->minlen + (args->alignment - 1) + args->minalignslop; + alloc_len = args->minlen + (args->alignment - 1) + args->alignslop; longest = xfs_alloc_longest_free_extent(pag, min_free, reservation); if (longest < alloc_len) return false; @@ -2420,7 +2420,7 @@ xfs_alloc_space_available( * allocation as we know that will definitely succeed and match the * callers alignment constraints. */ - alloc_len = args->maxlen + (args->alignment - 1) + args->minalignslop; + alloc_len = args->maxlen + (args->alignment - 1) + args->alignslop; if (longest < alloc_len) { args->maxlen = args->minlen; ASSERT(args->maxlen > 0); diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h index 0b956f8b9d5a..aa2c103d98f0 100644 --- a/fs/xfs/libxfs/xfs_alloc.h +++ b/fs/xfs/libxfs/xfs_alloc.h @@ -46,7 +46,7 @@ typedef struct xfs_alloc_arg { xfs_extlen_t minleft; /* min blocks must be left after us */ xfs_extlen_t total; /* total blocks needed in xaction */ xfs_extlen_t alignment; /* align answer to multiple of this */ - xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */ + xfs_extlen_t alignslop; /* slop for alignment calcs */ xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */ xfs_agblock_t max_agbno; /* ... */ xfs_extlen_t len; /* output: actual size of extent */ diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index c101cf266bc4..7f8c8e4dd244 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3285,6 +3285,10 @@ xfs_bmap_select_minlen( xfs_extlen_t blen) { + /* Adjust best length for extent start alignment. */ + if (blen > args->alignment) + blen -= args->alignment; + /* * Since we used XFS_ALLOC_FLAG_TRYLOCK in _longest_free_extent(), it is * possible that there is enough contiguous free space for this request. @@ -3300,6 +3304,7 @@ xfs_bmap_select_minlen( if (blen < args->maxlen) return blen; return args->maxlen; + } static int @@ -3393,35 +3398,43 @@ xfs_bmap_alloc_account( xfs_trans_mod_dquot_byino(ap->tp, ap->ip, fld, ap->length); } -static int +/* + * Calculate the extent start alignment and the extent length adjustments that + * constrain this allocation. + * + * Extent start alignment is currently determined by stripe configuration and is + * carried in args->alignment, whilst extent length adjustment is determined by + * extent size hints and is carried by args->prod and args->mod. + * + * Low level allocation code is free to either ignore or override these values + * as required. + */ +static void xfs_bmap_compute_alignments( struct xfs_bmalloca *ap, struct xfs_alloc_arg *args) { struct xfs_mount *mp = args->mp; xfs_extlen_t align = 0; /* minimum allocation alignment */ - int stripe_align = 0; /* stripe alignment for allocation is determined by mount parameters */ if (mp->m_swidth && xfs_has_swalloc(mp)) - stripe_align = mp->m_swidth; + args->alignment = mp->m_swidth; else if (mp->m_dalign) - stripe_align = mp->m_dalign; + args->alignment = mp->m_dalign; if (ap->flags & XFS_BMAPI_COWFORK) align = xfs_get_cowextsz_hint(ap->ip); else if (ap->datatype & XFS_ALLOC_USERDATA) align = xfs_get_extsz_hint(ap->ip); + if (align) { if (xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, align, 0, ap->eof, 0, ap->conv, &ap->offset, &ap->length)) ASSERT(0); ASSERT(ap->length); - } - /* apply extent size hints if obtained earlier */ - if (align) { args->prod = align; div_u64_rem(ap->offset, args->prod, &args->mod); if (args->mod) @@ -3436,7 +3449,6 @@ xfs_bmap_compute_alignments( args->mod = args->prod - args->mod; } - return stripe_align; } static void @@ -3508,7 +3520,7 @@ xfs_bmap_exact_minlen_extent_alloc( args.total = ap->total; args.alignment = 1; - args.minalignslop = 0; + args.alignslop = 0; args.minleft = ap->minleft; args.wasdel = ap->wasdel; @@ -3548,7 +3560,6 @@ xfs_bmap_btalloc_at_eof( struct xfs_bmalloca *ap, struct xfs_alloc_arg *args, xfs_extlen_t blen, - int stripe_align, bool ag_only) { struct xfs_mount *mp = args->mp; @@ -3562,23 +3573,15 @@ xfs_bmap_btalloc_at_eof( * allocation. */ if (ap->offset) { - xfs_extlen_t nextminlen = 0; + xfs_extlen_t alignment = args->alignment; /* - * Compute the minlen+alignment for the next case. Set slop so - * that the value of minlen+alignment+slop doesn't go up between - * the calls. + * Compute the alignment slop for the fallback path so we ensure + * we account for the potential alignemnt space required by the + * fallback paths before we modify the AGF and AGFL here. */ args->alignment = 1; - if (blen > stripe_align && blen <= args->maxlen) - nextminlen = blen - stripe_align; - else - nextminlen = args->minlen; - if (nextminlen + stripe_align > args->minlen + 1) - args->minalignslop = nextminlen + stripe_align - - args->minlen - 1; - else - args->minalignslop = 0; + args->alignslop = alignment - args->alignment; if (!caller_pag) args->pag = xfs_perag_get(mp, XFS_FSB_TO_AGNO(mp, ap->blkno)); @@ -3596,19 +3599,8 @@ xfs_bmap_btalloc_at_eof( * Exact allocation failed. Reset to try an aligned allocation * according to the original allocation specification. */ - args->alignment = stripe_align; - args->minlen = nextminlen; - args->minalignslop = 0; - } else { - /* - * Adjust minlen to try and preserve alignment if we - * can't guarantee an aligned maxlen extent. - */ - args->alignment = stripe_align; - if (blen > args->alignment && - blen <= args->maxlen + args->alignment) - args->minlen = blen - args->alignment; - args->minalignslop = 0; + args->alignment = alignment; + args->alignslop = 0; } if (ag_only) { @@ -3626,9 +3618,8 @@ xfs_bmap_btalloc_at_eof( return 0; /* - * Allocation failed, so turn return the allocation args to their - * original non-aligned state so the caller can proceed on allocation - * failure as if this function was never called. + * Aligned allocation failed, so all fallback paths from here drop the + * start alignment requirement as we know it will not succeed. */ args->alignment = 1; return 0; @@ -3636,7 +3627,9 @@ xfs_bmap_btalloc_at_eof( /* * We have failed multiple allocation attempts so now are in a low space - * allocation situation. Try a locality first full filesystem minimum length + * allocation situation. We give up on any attempt at aligned allocation here. + * + * Try a locality first full filesystem minimum length * allocation whilst still maintaining necessary total block reservation * requirements. * @@ -3653,6 +3646,7 @@ xfs_bmap_btalloc_low_space( { int error; + args->alignment = 1; if (args->minlen > ap->minlen) { args->minlen = ap->minlen; error = xfs_alloc_vextent_start_ag(args, ap->blkno); @@ -3672,13 +3666,11 @@ xfs_bmap_btalloc_low_space( static int xfs_bmap_btalloc_filestreams( struct xfs_bmalloca *ap, - struct xfs_alloc_arg *args, - int stripe_align) + struct xfs_alloc_arg *args) { xfs_extlen_t blen = 0; int error = 0; - error = xfs_filestream_select_ag(ap, args, &blen); if (error) return error; @@ -3697,8 +3689,7 @@ xfs_bmap_btalloc_filestreams( args->minlen = xfs_bmap_select_minlen(ap, args, blen); if (ap->aeof) - error = xfs_bmap_btalloc_at_eof(ap, args, blen, stripe_align, - true); + error = xfs_bmap_btalloc_at_eof(ap, args, blen, true); if (!error && args->fsbno == NULLFSBLOCK) error = xfs_alloc_vextent_near_bno(args, ap->blkno); @@ -3722,8 +3713,7 @@ xfs_bmap_btalloc_filestreams( static int xfs_bmap_btalloc_best_length( struct xfs_bmalloca *ap, - struct xfs_alloc_arg *args, - int stripe_align) + struct xfs_alloc_arg *args) { xfs_extlen_t blen = 0; int error; @@ -3747,8 +3737,7 @@ xfs_bmap_btalloc_best_length( * trying. */ if (ap->aeof && !(ap->tp->t_flags & XFS_TRANS_LOWMODE)) { - error = xfs_bmap_btalloc_at_eof(ap, args, blen, stripe_align, - false); + error = xfs_bmap_btalloc_at_eof(ap, args, blen, false); if (error || args->fsbno != NULLFSBLOCK) return error; } @@ -3775,27 +3764,26 @@ xfs_bmap_btalloc( .resv = XFS_AG_RESV_NONE, .datatype = ap->datatype, .alignment = 1, - .minalignslop = 0, + .alignslop = 0, }; xfs_fileoff_t orig_offset; xfs_extlen_t orig_length; int error; - int stripe_align; ASSERT(ap->length); orig_offset = ap->offset; orig_length = ap->length; - stripe_align = xfs_bmap_compute_alignments(ap, &args); + xfs_bmap_compute_alignments(ap, &args); /* Trim the allocation back to the maximum an AG can fit. */ args.maxlen = min(ap->length, mp->m_ag_max_usable); if ((ap->datatype & XFS_ALLOC_USERDATA) && xfs_inode_is_filestream(ap->ip)) - error = xfs_bmap_btalloc_filestreams(ap, &args, stripe_align); + error = xfs_bmap_btalloc_filestreams(ap, &args); else - error = xfs_bmap_btalloc_best_length(ap, &args, stripe_align); + error = xfs_bmap_btalloc_best_length(ap, &args); if (error) return error; diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c index 14c81f227c5b..9f71a9a3a65e 100644 --- a/fs/xfs/libxfs/xfs_ialloc.c +++ b/fs/xfs/libxfs/xfs_ialloc.c @@ -758,12 +758,12 @@ xfs_ialloc_ag_alloc( * * For an exact allocation, alignment must be 1, * however we need to take cluster alignment into account when - * fixing up the freelist. Use the minalignslop field to - * indicate that extra blocks might be required for alignment, - * but not to use them in the actual exact allocation. + * fixing up the freelist. Use the alignslop field to indicate + * that extra blocks might be required for alignment, but not + * to use them in the actual exact allocation. */ args.alignment = 1; - args.minalignslop = igeo->cluster_align - 1; + args.alignslop = igeo->cluster_align - 1; /* Allow space for the inode btree to split. */ args.minleft = igeo->inobt_maxlevels; @@ -783,7 +783,7 @@ xfs_ialloc_ag_alloc( * on, so reset minalignslop to ensure it is not included in * subsequent requests. */ - args.minalignslop = 0; + args.alignslop = 0; } if (unlikely(args.fsbno == NULLFSBLOCK)) { diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 25ff6fe1eb6c..0b2a2a1379bd 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -1808,7 +1808,7 @@ DECLARE_EVENT_CLASS(xfs_alloc_class, __field(xfs_extlen_t, minleft) __field(xfs_extlen_t, total) __field(xfs_extlen_t, alignment) - __field(xfs_extlen_t, minalignslop) + __field(xfs_extlen_t, alignslop) __field(xfs_extlen_t, len) __field(char, wasdel) __field(char, wasfromfl) @@ -1827,7 +1827,7 @@ DECLARE_EVENT_CLASS(xfs_alloc_class, __entry->minleft = args->minleft; __entry->total = args->total; __entry->alignment = args->alignment; - __entry->minalignslop = args->minalignslop; + __entry->alignslop = args->alignslop; __entry->len = args->len; __entry->wasdel = args->wasdel; __entry->wasfromfl = args->wasfromfl; @@ -1836,7 +1836,7 @@ DECLARE_EVENT_CLASS(xfs_alloc_class, __entry->highest_agno = args->tp->t_highest_agno; ), TP_printk("dev %d:%d agno 0x%x agbno 0x%x minlen %u maxlen %u mod %u " - "prod %u minleft %u total %u alignment %u minalignslop %u " + "prod %u minleft %u total %u alignment %u alignslop %u " "len %u wasdel %d wasfromfl %d resv %d " "datatype 0x%x highest_agno 0x%x", MAJOR(__entry->dev), MINOR(__entry->dev), @@ -1849,7 +1849,7 @@ DECLARE_EVENT_CLASS(xfs_alloc_class, __entry->minleft, __entry->total, __entry->alignment, - __entry->minalignslop, + __entry->alignslop, __entry->len, __entry->wasdel, __entry->wasfromfl, From patchwork Fri Jun 7 14:39:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690189 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EDCA4C27C6E for ; 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When the offset is non-zero, we try to do exact block allocation for contiguous extent allocation. When the offset is zero, the allocation is simply an aligned allocation. We want aligned allocation as the fallback when exact block allocation fails, but that complicates the EOF allocation in that it now has to handle two different allocation cases. The caller also has to handle allocation when not at EOF, and for the upcoming forced alignment changes we need that to also be aligned allocation. To simplify all this, pull the aligned allocation cases back into the callers and leave the EOF allocation path for exact block allocation only. This means that the EOF exact block allocation fallback path is the normal aligned allocation path and that ends up making things a lot simpler when forced alignment is introduced. Signed-off-by: Dave Chinner Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_bmap.c | 129 +++++++++++++++---------------------- fs/xfs/libxfs/xfs_ialloc.c | 2 +- 2 files changed, 54 insertions(+), 77 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 7f8c8e4dd244..528e3cd81ee6 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3310,12 +3310,12 @@ xfs_bmap_select_minlen( static int xfs_bmap_btalloc_select_lengths( struct xfs_bmalloca *ap, - struct xfs_alloc_arg *args, - xfs_extlen_t *blen) + struct xfs_alloc_arg *args) { struct xfs_mount *mp = args->mp; struct xfs_perag *pag; xfs_agnumber_t agno, startag; + xfs_extlen_t blen = 0; int error = 0; if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { @@ -3329,19 +3329,18 @@ xfs_bmap_btalloc_select_lengths( if (startag == NULLAGNUMBER) startag = 0; - *blen = 0; for_each_perag_wrap(mp, startag, agno, pag) { - error = xfs_bmap_longest_free_extent(pag, args->tp, blen); + error = xfs_bmap_longest_free_extent(pag, args->tp, &blen); if (error && error != -EAGAIN) break; error = 0; - if (*blen >= args->maxlen) + if (blen >= args->maxlen) break; } if (pag) xfs_perag_rele(pag); - args->minlen = xfs_bmap_select_minlen(ap, args, *blen); + args->minlen = xfs_bmap_select_minlen(ap, args, blen); return error; } @@ -3551,78 +3550,40 @@ xfs_bmap_exact_minlen_extent_alloc( * If we are not low on available data blocks and we are allocating at * EOF, optimise allocation for contiguous file extension and/or stripe * alignment of the new extent. - * - * NOTE: ap->aeof is only set if the allocation length is >= the - * stripe unit and the allocation offset is at the end of file. */ static int xfs_bmap_btalloc_at_eof( struct xfs_bmalloca *ap, - struct xfs_alloc_arg *args, - xfs_extlen_t blen, - bool ag_only) + struct xfs_alloc_arg *args) { struct xfs_mount *mp = args->mp; struct xfs_perag *caller_pag = args->pag; + xfs_extlen_t alignment = args->alignment; int error; + ASSERT(ap->aeof && ap->offset); + ASSERT(args->alignment >= 1); + /* - * If there are already extents in the file, try an exact EOF block - * allocation to extend the file as a contiguous extent. If that fails, - * or it's the first allocation in a file, just try for a stripe aligned - * allocation. + * Compute the alignment slop for the fallback path so we ensure + * we account for the potential alignemnt space required by the + * fallback paths before we modify the AGF and AGFL here. */ - if (ap->offset) { - xfs_extlen_t alignment = args->alignment; - - /* - * Compute the alignment slop for the fallback path so we ensure - * we account for the potential alignemnt space required by the - * fallback paths before we modify the AGF and AGFL here. - */ - args->alignment = 1; - args->alignslop = alignment - args->alignment; - - if (!caller_pag) - args->pag = xfs_perag_get(mp, XFS_FSB_TO_AGNO(mp, ap->blkno)); - error = xfs_alloc_vextent_exact_bno(args, ap->blkno); - if (!caller_pag) { - xfs_perag_put(args->pag); - args->pag = NULL; - } - if (error) - return error; - - if (args->fsbno != NULLFSBLOCK) - return 0; - /* - * Exact allocation failed. Reset to try an aligned allocation - * according to the original allocation specification. - */ - args->alignment = alignment; - args->alignslop = 0; - } + args->alignment = 1; + args->alignslop = alignment - args->alignment; - if (ag_only) { - error = xfs_alloc_vextent_near_bno(args, ap->blkno); - } else { + if (!caller_pag) + args->pag = xfs_perag_get(mp, XFS_FSB_TO_AGNO(mp, ap->blkno)); + error = xfs_alloc_vextent_exact_bno(args, ap->blkno); + if (!caller_pag) { + xfs_perag_put(args->pag); args->pag = NULL; - error = xfs_alloc_vextent_start_ag(args, ap->blkno); - ASSERT(args->pag == NULL); - args->pag = caller_pag; } - if (error) - return error; - if (args->fsbno != NULLFSBLOCK) - return 0; - - /* - * Aligned allocation failed, so all fallback paths from here drop the - * start alignment requirement as we know it will not succeed. - */ - args->alignment = 1; - return 0; + /* Reset alignment to original specifications. */ + args->alignment = alignment; + args->alignslop = 0; + return error; } /* @@ -3688,12 +3649,19 @@ xfs_bmap_btalloc_filestreams( } args->minlen = xfs_bmap_select_minlen(ap, args, blen); - if (ap->aeof) - error = xfs_bmap_btalloc_at_eof(ap, args, blen, true); + if (ap->aeof && ap->offset) + error = xfs_bmap_btalloc_at_eof(ap, args); + /* This may be an aligned allocation attempt. */ if (!error && args->fsbno == NULLFSBLOCK) error = xfs_alloc_vextent_near_bno(args, ap->blkno); + /* Attempt non-aligned allocation if we haven't already. */ + if (!error && args->fsbno == NULLFSBLOCK && args->alignment > 1) { + args->alignment = 1; + error = xfs_alloc_vextent_near_bno(args, ap->blkno); + } + out_low_space: /* * We are now done with the perag reference for the filestreams @@ -3715,7 +3683,6 @@ xfs_bmap_btalloc_best_length( struct xfs_bmalloca *ap, struct xfs_alloc_arg *args) { - xfs_extlen_t blen = 0; int error; ap->blkno = XFS_INO_TO_FSB(args->mp, ap->ip->i_ino); @@ -3726,23 +3693,33 @@ xfs_bmap_btalloc_best_length( * the request. If one isn't found, then adjust the minimum allocation * size to the largest space found. */ - error = xfs_bmap_btalloc_select_lengths(ap, args, &blen); + error = xfs_bmap_btalloc_select_lengths(ap, args); if (error) return error; /* - * Don't attempt optimal EOF allocation if previous allocations barely - * succeeded due to being near ENOSPC. It is highly unlikely we'll get - * optimal or even aligned allocations in this case, so don't waste time - * trying. + * If we are in low space mode, then optimal allocation will fail so + * prepare for minimal allocation and run the low space algorithm + * immediately. */ - if (ap->aeof && !(ap->tp->t_flags & XFS_TRANS_LOWMODE)) { - error = xfs_bmap_btalloc_at_eof(ap, args, blen, false); - if (error || args->fsbno != NULLFSBLOCK) - return error; + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { + ASSERT(args->fsbno == NULLFSBLOCK); + return xfs_bmap_btalloc_low_space(ap, args); + } + + if (ap->aeof && ap->offset) + error = xfs_bmap_btalloc_at_eof(ap, args); + + /* This may be an aligned allocation attempt. */ + if (!error && args->fsbno == NULLFSBLOCK) + error = xfs_alloc_vextent_start_ag(args, ap->blkno); + + /* Attempt non-aligned allocation if we haven't already. */ + if (!error && args->fsbno == NULLFSBLOCK && args->alignment > 1) { + args->alignment = 1; + error = xfs_alloc_vextent_start_ag(args, ap->blkno); } - error = xfs_alloc_vextent_start_ag(args, ap->blkno); if (error || args->fsbno != NULLFSBLOCK) return error; diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c index 9f71a9a3a65e..40a2daeea712 100644 --- a/fs/xfs/libxfs/xfs_ialloc.c +++ b/fs/xfs/libxfs/xfs_ialloc.c @@ -780,7 +780,7 @@ xfs_ialloc_ag_alloc( * the exact agbno requirement and increase the alignment * instead. It is critical that the total size of the request * (len + alignment + slop) does not increase from this point - * on, so reset minalignslop to ensure it is not included in + * on, so reset alignslop to ensure it is not included in * subsequent requests. */ args.alignslop = 0; From patchwork Fri Jun 7 14:39:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690191 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36D71C27C6F for ; Fri, 7 Jun 2024 14:40:35 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-1.v29.lw.sourceforge.com) by sfs-ml-1.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1sFald-0000sK-MV; 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If aligned allocation cannot be done, then the allocation is failed rather than attempting non-aligned fallbacks. Note: none of the per-inode force align configuration is present yet, so this just triggers off an "always false" wrapper function for the moment. Signed-off-by: Dave Chinner Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_alloc.h | 1 + fs/xfs/libxfs/xfs_bmap.c | 29 +++++++++++++++++++++++------ fs/xfs/xfs_inode.h | 5 +++++ 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h index aa2c103d98f0..7de2e6f64882 100644 --- a/fs/xfs/libxfs/xfs_alloc.h +++ b/fs/xfs/libxfs/xfs_alloc.h @@ -66,6 +66,7 @@ typedef struct xfs_alloc_arg { #define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/ #define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */ #define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */ +#define XFS_ALLOC_FORCEALIGN (1 << 3)/* forced extent alignment */ /* freespace limit calculations */ unsigned int xfs_alloc_set_aside(struct xfs_mount *mp); diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 528e3cd81ee6..9131ba8113a6 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3401,9 +3401,10 @@ xfs_bmap_alloc_account( * Calculate the extent start alignment and the extent length adjustments that * constrain this allocation. * - * Extent start alignment is currently determined by stripe configuration and is - * carried in args->alignment, whilst extent length adjustment is determined by - * extent size hints and is carried by args->prod and args->mod. + * Extent start alignment is currently determined by forced inode alignment or + * stripe configuration and is carried in args->alignment, whilst extent length + * adjustment is determined by extent size hints and is carried by args->prod + * and args->mod. * * Low level allocation code is free to either ignore or override these values * as required. @@ -3416,11 +3417,18 @@ xfs_bmap_compute_alignments( struct xfs_mount *mp = args->mp; xfs_extlen_t align = 0; /* minimum allocation alignment */ - /* stripe alignment for allocation is determined by mount parameters */ - if (mp->m_swidth && xfs_has_swalloc(mp)) + /* + * Forced inode alignment takes preference over stripe alignment. + * Stripe alignment for allocation is determined by mount parameters. + */ + if (xfs_inode_has_forcealign(ap->ip)) { + args->alignment = xfs_get_extsz_hint(ap->ip); + args->datatype |= XFS_ALLOC_FORCEALIGN; + } else if (mp->m_swidth && xfs_has_swalloc(mp)) { args->alignment = mp->m_swidth; - else if (mp->m_dalign) + } else if (mp->m_dalign) { args->alignment = mp->m_dalign; + } if (ap->flags & XFS_BMAPI_COWFORK) align = xfs_get_cowextsz_hint(ap->ip); @@ -3607,6 +3615,11 @@ xfs_bmap_btalloc_low_space( { int error; + if (args->alignment > 1 && (args->datatype & XFS_ALLOC_FORCEALIGN)) { + args->fsbno = NULLFSBLOCK; + return 0; + } + args->alignment = 1; if (args->minlen > ap->minlen) { args->minlen = ap->minlen; @@ -3658,6 +3671,8 @@ xfs_bmap_btalloc_filestreams( /* Attempt non-aligned allocation if we haven't already. */ if (!error && args->fsbno == NULLFSBLOCK && args->alignment > 1) { + if (args->datatype & XFS_ALLOC_FORCEALIGN) + return error; args->alignment = 1; error = xfs_alloc_vextent_near_bno(args, ap->blkno); } @@ -3716,6 +3731,8 @@ xfs_bmap_btalloc_best_length( /* Attempt non-aligned allocation if we haven't already. */ if (!error && args->fsbno == NULLFSBLOCK && args->alignment > 1) { + if (args->datatype & XFS_ALLOC_FORCEALIGN) + return error; args->alignment = 1; error = xfs_alloc_vextent_start_ag(args, ap->blkno); } diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 90d2fa837117..805a8cf522c6 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -311,6 +311,11 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip) return ip->i_diflags2 & XFS_DIFLAG2_NREXT64; } +static inline bool xfs_inode_has_forcealign(struct xfs_inode *ip) +{ + return false; +} + /* * Decide if this file is a realtime file whose data allocation unit is larger * than a single filesystem block. 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Avoid this by always aligning args->minlen appropriately. If alignment of minlen results in a value smaller than the alignment constraint, fail the allocation immediately. Signed-off-by: Dave Chinner Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_bmap.c | 45 +++++++++++++++++++++++++++------------- 1 file changed, 31 insertions(+), 14 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 9131ba8113a6..c9cf138e13c4 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3278,33 +3278,48 @@ xfs_bmap_longest_free_extent( return 0; } -static xfs_extlen_t +static int xfs_bmap_select_minlen( struct xfs_bmalloca *ap, struct xfs_alloc_arg *args, xfs_extlen_t blen) { - /* Adjust best length for extent start alignment. */ if (blen > args->alignment) blen -= args->alignment; /* * Since we used XFS_ALLOC_FLAG_TRYLOCK in _longest_free_extent(), it is - * possible that there is enough contiguous free space for this request. + * possible that there is enough contiguous free space for this request + * even if best length is less that the minimum length we need. + * + * If the best length won't satisfy the maximum length we requested, + * then use it as the minimum length so we get as large an allocation + * as possible. */ if (blen < ap->minlen) - return ap->minlen; + blen = ap->minlen; + else if (blen > args->maxlen) + blen = args->maxlen; /* - * If the best seen length is less than the request length, - * use the best as the minimum, otherwise we've got the maxlen we - * were asked for. + * If we have alignment constraints, round the minlen down to match the + * constraint so that alignment will be attempted. This may reduce the + * allocation to smaller than was requested, so clamp the minimum to + * ap->minlen to allow unaligned allocation to succeed. If we are forced + * to align the allocation, return ENOSPC at this point because we don't + * have enough contiguous free space to guarantee aligned allocation. */ - if (blen < args->maxlen) - return blen; - return args->maxlen; - + if (args->alignment > 1) { + blen = rounddown(blen, args->alignment); + if (blen < ap->minlen) { + if (args->datatype & XFS_ALLOC_FORCEALIGN) + return -ENOSPC; + blen = ap->minlen; + } + } + args->minlen = blen; + return 0; } static int @@ -3340,8 +3355,7 @@ xfs_bmap_btalloc_select_lengths( if (pag) xfs_perag_rele(pag); - args->minlen = xfs_bmap_select_minlen(ap, args, blen); - return error; + return xfs_bmap_select_minlen(ap, args, blen); } /* Update all inode and quota accounting for the allocation we just did. */ @@ -3661,7 +3675,10 @@ xfs_bmap_btalloc_filestreams( goto out_low_space; } - args->minlen = xfs_bmap_select_minlen(ap, args, blen); + error = xfs_bmap_select_minlen(ap, args, blen); + if (error) + goto out_low_space; + if (ap->aeof && ap->offset) error = xfs_bmap_btalloc_at_eof(ap, args); 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Wong" Add a new inode flag to require that all file data extent mappings must be aligned (both the file offset range and the allocated space itself) to the extent size hint. Having a separate COW extent size hint is no longer allowed. The goal here is to enable sysadmins and users to mandate that all space mappings in a file must have a startoff/blockcount that are aligned to (say) a 2MB alignment and that the startblock/blockcount will follow the same alignment. Signed-off-by: "Darrick J. Wong" Co-developed-by: John Garry Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_format.h | 6 +++- fs/xfs/libxfs/xfs_inode_buf.c | 53 +++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_inode_buf.h | 3 ++ fs/xfs/libxfs/xfs_sb.c | 2 ++ fs/xfs/xfs_inode.c | 13 +++++++++ fs/xfs/xfs_inode.h | 20 ++++++++++++- fs/xfs/xfs_ioctl.c | 47 +++++++++++++++++++++++++++++-- fs/xfs/xfs_mount.h | 2 ++ fs/xfs/xfs_reflink.h | 10 ------- fs/xfs/xfs_super.c | 4 +++ include/uapi/linux/fs.h | 2 ++ 11 files changed, 148 insertions(+), 14 deletions(-) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 61f51becff4f..b48cd75d34a6 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -353,6 +353,7 @@ xfs_sb_has_compat_feature( #define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1) /* reverse map btree */ #define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */ #define XFS_SB_FEAT_RO_COMPAT_INOBTCNT (1 << 3) /* inobt block counts */ +#define XFS_SB_FEAT_RO_COMPAT_FORCEALIGN (1 << 30) /* aligned file data extents */ #define XFS_SB_FEAT_RO_COMPAT_ALL \ (XFS_SB_FEAT_RO_COMPAT_FINOBT | \ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \ @@ -1094,16 +1095,19 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */ #define XFS_DIFLAG2_BIGTIME_BIT 3 /* big timestamps */ #define XFS_DIFLAG2_NREXT64_BIT 4 /* large extent counters */ +/* data extent mappings for regular files must be aligned to extent size hint */ +#define XFS_DIFLAG2_FORCEALIGN_BIT 5 #define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT) #define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT) #define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT) #define XFS_DIFLAG2_BIGTIME (1 << XFS_DIFLAG2_BIGTIME_BIT) #define XFS_DIFLAG2_NREXT64 (1 << XFS_DIFLAG2_NREXT64_BIT) +#define XFS_DIFLAG2_FORCEALIGN (1 << XFS_DIFLAG2_FORCEALIGN_BIT) #define XFS_DIFLAG2_ANY \ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ - XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64) + XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_FORCEALIGN) static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip) { diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index e7a7bfbe75b4..b2c5f466c1a9 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -644,6 +644,15 @@ xfs_dinode_verify( !xfs_has_bigtime(mp)) return __this_address; + if (flags2 & XFS_DIFLAG2_FORCEALIGN) { + fa = xfs_inode_validate_forcealign(mp, + be32_to_cpu(dip->di_extsize), + be32_to_cpu(dip->di_cowextsize), + mode, flags, flags2); + if (fa) + return fa; + } + return NULL; } @@ -811,3 +820,47 @@ xfs_inode_validate_cowextsize( return NULL; } + +/* Validate the forcealign inode flag */ +xfs_failaddr_t +xfs_inode_validate_forcealign( + struct xfs_mount *mp, + uint32_t extsize, + uint32_t cowextsize, + uint16_t mode, + uint16_t flags, + uint64_t flags2) +{ + /* superblock rocompat feature flag */ + if (!xfs_has_forcealign(mp)) + return __this_address; + + /* Only regular files and directories */ + if (!S_ISDIR(mode) && !S_ISREG(mode)) + return __this_address; + + /* We require EXTSIZE or EXTSZINHERIT */ + if (!(flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))) + return __this_address; + + /* We require a non-zero extsize */ + if (!extsize) + return __this_address; + + /* Reflink'ed disallowed */ + if (flags2 & XFS_DIFLAG2_REFLINK) + return __this_address; + + /* COW extsize disallowed */ + if (flags2 & XFS_DIFLAG2_COWEXTSIZE) + return __this_address; + + if (cowextsize) + return __this_address; + + /* A RT device with sb_rextsize=1 could make use of forcealign */ + if (flags & XFS_DIFLAG_REALTIME && mp->m_sb.sb_rextsize != 1) + return __this_address; + + return NULL; +} diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h index 585ed5a110af..b8b65287b037 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.h +++ b/fs/xfs/libxfs/xfs_inode_buf.h @@ -33,6 +33,9 @@ xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp, xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp, uint32_t cowextsize, uint16_t mode, uint16_t flags, uint64_t flags2); +xfs_failaddr_t xfs_inode_validate_forcealign(struct xfs_mount *mp, + uint32_t extsize, uint32_t cowextsize, uint16_t mode, + uint16_t flags, uint64_t flags2); static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv) { diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 09e4bf949bf8..515f5dd23b6d 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -164,6 +164,8 @@ xfs_sb_version_to_features( features |= XFS_FEAT_REFLINK; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) features |= XFS_FEAT_INOBTCNT; + if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FORCEALIGN) + features |= XFS_FEAT_FORCEALIGN; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) features |= XFS_FEAT_FTYPE; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 93ad442f399b..a6cd5f1f2680 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -608,6 +608,8 @@ xfs_ip2xflags( flags |= FS_XFLAG_DAX; if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) flags |= FS_XFLAG_COWEXTSIZE; + if (ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) + flags |= FS_XFLAG_FORCEALIGN; } if (xfs_inode_has_attr_fork(ip)) @@ -737,6 +739,8 @@ xfs_inode_inherit_flags2( } if (pip->i_diflags2 & XFS_DIFLAG2_DAX) ip->i_diflags2 |= XFS_DIFLAG2_DAX; + if (pip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) + ip->i_diflags2 |= XFS_DIFLAG2_FORCEALIGN; /* Don't let invalid cowextsize hints propagate. */ failaddr = xfs_inode_validate_cowextsize(ip->i_mount, ip->i_cowextsize, @@ -745,6 +749,15 @@ xfs_inode_inherit_flags2( ip->i_diflags2 &= ~XFS_DIFLAG2_COWEXTSIZE; ip->i_cowextsize = 0; } + + if (ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) { + failaddr = xfs_inode_validate_forcealign(ip->i_mount, + ip->i_extsize, ip->i_cowextsize, + VFS_I(ip)->i_mode, ip->i_diflags, + ip->i_diflags2); + if (failaddr) + ip->i_diflags2 &= ~XFS_DIFLAG2_FORCEALIGN; + } } /* diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 805a8cf522c6..7005ea29bf11 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -301,6 +301,16 @@ static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip) return ip->i_cowfp && ip->i_cowfp->if_bytes; } +static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip) +{ + return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount); +} + +static inline bool xfs_is_cow_inode(struct xfs_inode *ip) +{ + return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); +} + static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip) { return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME; @@ -313,7 +323,15 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip) static inline bool xfs_inode_has_forcealign(struct xfs_inode *ip) { - return false; + if (!(ip->i_diflags & XFS_DIFLAG_EXTSIZE)) + return false; + if (ip->i_extsize <= 1) + return false; + if (xfs_is_cow_inode(ip)) + return false; + if (ip->i_diflags & XFS_DIFLAG_REALTIME) + return false; + return ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN; } /* diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index f0117188f302..5eff8fd9fa3e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -525,10 +525,48 @@ xfs_flags2diflags2( di_flags2 |= XFS_DIFLAG2_DAX; if (xflags & FS_XFLAG_COWEXTSIZE) di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; + if (xflags & FS_XFLAG_FORCEALIGN) + di_flags2 |= XFS_DIFLAG2_FORCEALIGN; return di_flags2; } +/* + * Forcealign requires a non-zero extent size hint and a zero cow + * extent size hint. Don't allow set for RT files yet. + */ +static int +xfs_ioctl_setattr_forcealign( + struct xfs_inode *ip, + struct fileattr *fa) +{ + struct xfs_mount *mp = ip->i_mount; + + if (!xfs_has_forcealign(mp)) + return -EINVAL; + + if (xfs_is_reflink_inode(ip)) + return -EINVAL; + + if (!(fa->fsx_xflags & (FS_XFLAG_EXTSIZE | + FS_XFLAG_EXTSZINHERIT))) + return -EINVAL; + + if (fa->fsx_xflags & FS_XFLAG_COWEXTSIZE) + return -EINVAL; + + if (!fa->fsx_extsize) + return -EINVAL; + + if (fa->fsx_cowextsize) + return -EINVAL; + + if (fa->fsx_xflags & FS_XFLAG_REALTIME) + return -EINVAL; + + return 0; +} + static int xfs_ioctl_setattr_xflags( struct xfs_trans *tp, @@ -537,10 +575,12 @@ xfs_ioctl_setattr_xflags( { struct xfs_mount *mp = ip->i_mount; bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME); + bool forcealign = fa->fsx_xflags & FS_XFLAG_FORCEALIGN; uint64_t i_flags2; - if (rtflag != XFS_IS_REALTIME_INODE(ip)) { - /* Can't change realtime flag if any extents are allocated. */ + /* Can't change RT or forcealign flags if any extents are allocated. */ + if (rtflag != XFS_IS_REALTIME_INODE(ip) || + forcealign != xfs_inode_has_forcealign(ip)) { if (ip->i_df.if_nextents || ip->i_delayed_blks) return -EINVAL; } @@ -561,6 +601,9 @@ xfs_ioctl_setattr_xflags( if (i_flags2 && !xfs_has_v3inodes(mp)) return -EINVAL; + if (forcealign && (xfs_ioctl_setattr_forcealign(ip, fa) < 0)) + return -EINVAL; + ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); ip->i_diflags2 = i_flags2; diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index d0567dfbc036..30228fea908d 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -299,6 +299,7 @@ typedef struct xfs_mount { #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ #define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */ +#define XFS_FEAT_FORCEALIGN (1ULL << 28) /* aligned file data extents */ /* Mount features */ #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ @@ -385,6 +386,7 @@ __XFS_ADD_V4_FEAT(projid32, PROJID32) __XFS_HAS_V4_FEAT(v3inodes, V3INODES) __XFS_HAS_V4_FEAT(crc, CRC) __XFS_HAS_V4_FEAT(pquotino, PQUOTINO) +__XFS_HAS_FEAT(forcealign, FORCEALIGN) /* * Mount features diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index 65c5dfe17ecf..fb55e4ce49fa 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -6,16 +6,6 @@ #ifndef __XFS_REFLINK_H #define __XFS_REFLINK_H 1 -static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip) -{ - return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount); -} - -static inline bool xfs_is_cow_inode(struct xfs_inode *ip) -{ - return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); -} - extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip, struct xfs_bmbt_irec *irec, bool *shared); int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap, diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 27e9f749c4c7..852bbfb21506 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1721,6 +1721,10 @@ xfs_fs_fill_super( mp->m_features &= ~XFS_FEAT_DISCARD; } + if (xfs_has_forcealign(mp)) + xfs_warn(mp, +"EXPERIMENTAL forced data extent alignment feature in use. Use at your own risk!"); + if (xfs_has_reflink(mp)) { if (mp->m_sb.sb_rblocks) { xfs_alert(mp, diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 191a7e88a8ab..6a6bcb53594a 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -158,6 +158,8 @@ struct fsxattr { #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ +/* data extent mappings for regular files must be aligned to extent size hint */ +#define FS_XFLAG_FORCEALIGN 0x00020000 #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is From patchwork Fri Jun 7 14:39:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690198 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DB709C27C6E for ; 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Signed-off-by: John Garry --- fs/xfs/xfs_bmap_util.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index e5d893f93522..56b80a7c0992 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -539,8 +539,13 @@ xfs_can_free_eofblocks( * forever. */ end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)); - if (xfs_inode_has_bigrtalloc(ip)) + + /* Do not free blocks when forcing extent sizes */ + if (xfs_inode_has_forcealign(ip)) + end_fsb = roundup_64(end_fsb, ip->i_extsize); + else if (xfs_inode_has_bigrtalloc(ip)) end_fsb = xfs_rtb_roundup_rtx(mp, end_fsb); + last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); if (last_fsb <= end_fsb) return false; From patchwork Fri Jun 7 14:39:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690199 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 14CD7C27C53 for ; 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Signed-off-by: John Garry --- fs/xfs/xfs_inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index a6cd5f1f2680..9c0ae5c3682e 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -4281,6 +4281,8 @@ unsigned int xfs_inode_alloc_unitsize_fsb( struct xfs_inode *ip) { + if (xfs_inode_has_forcealign(ip)) + return ip->i_extsize; if (XFS_IS_REALTIME_INODE(ip)) return ip->i_mount->m_sb.sb_rextsize; From patchwork Fri Jun 7 14:39:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690200 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C23B6C27C5F for ; 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Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_bmap.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index c9cf138e13c4..2b6d5ebd8b4f 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -5380,6 +5380,20 @@ xfs_bmap_del_extent_real( return 0; } +static xfs_extlen_t +xfs_bunmapi_align( + struct xfs_inode *ip, + xfs_fsblock_t bno) +{ + if (xfs_inode_has_forcealign(ip)) { + if (is_power_of_2(ip->i_extsize)) + return bno & (ip->i_extsize - 1); + return do_div(bno, ip->i_extsize); + } + ASSERT(XFS_IS_REALTIME_INODE(ip)); + return xfs_rtb_to_rtxoff(ip->i_mount, bno); +} + /* * Unmap (remove) blocks from a file. * If nexts is nonzero then the number of extents to remove is limited to @@ -5402,6 +5416,7 @@ __xfs_bunmapi( struct xfs_bmbt_irec got; /* current extent record */ struct xfs_ifork *ifp; /* inode fork pointer */ int isrt; /* freeing in rt area */ + int isforcealign; /* freeing for inode with forcealign */ int logflags; /* transaction logging flags */ xfs_extlen_t mod; /* rt extent offset */ struct xfs_mount *mp = ip->i_mount; @@ -5439,6 +5454,8 @@ __xfs_bunmapi( } XFS_STATS_INC(mp, xs_blk_unmap); isrt = xfs_ifork_is_realtime(ip, whichfork); + isforcealign = (whichfork != XFS_ATTR_FORK) && + xfs_inode_has_forcealign(ip); end = start + len; if (!xfs_iext_lookup_extent_before(ip, ifp, &end, &icur, &got)) { @@ -5490,11 +5507,10 @@ __xfs_bunmapi( if (del.br_startoff + del.br_blockcount > end + 1) del.br_blockcount = end + 1 - del.br_startoff; - if (!isrt || (flags & XFS_BMAPI_REMAP)) + if ((!isrt && !isforcealign) || (flags & XFS_BMAPI_REMAP)) goto delete; - mod = xfs_rtb_to_rtxoff(mp, - del.br_startblock + del.br_blockcount); + mod = xfs_bunmapi_align(ip, del.br_startblock + del.br_blockcount); if (mod) { /* * Realtime extent not lined up at the end. @@ -5542,9 +5558,16 @@ __xfs_bunmapi( goto nodelete; } - mod = xfs_rtb_to_rtxoff(mp, del.br_startblock); + mod = xfs_bunmapi_align(ip, del.br_startblock); if (mod) { - xfs_extlen_t off = mp->m_sb.sb_rextsize - mod; + xfs_extlen_t off; + + if (isforcealign) { + off = ip->i_extsize - mod; + } else { + ASSERT(isrt); + off = mp->m_sb.sb_rextsize - mod; + } /* * Realtime extent is lined up at the end but not From patchwork Fri Jun 7 14:39:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690201 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 97149C27C5F for ; Fri, 7 Jun 2024 14:40:54 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1sFalx-0003Ak-S1; 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Signed-off-by: John Garry --- fs/xfs/xfs_bmap_util.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 56b80a7c0992..ee767a4fd63a 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -842,8 +842,11 @@ xfs_free_file_space( startoffset_fsb = XFS_B_TO_FSB(mp, offset); endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); - /* We can only free complete realtime extents. */ - if (xfs_inode_has_bigrtalloc(ip)) { + /* Free only complete extents. */ + if (xfs_inode_has_forcealign(ip)) { + startoffset_fsb = roundup_64(startoffset_fsb, ip->i_extsize); + endoffset_fsb = rounddown_64(endoffset_fsb, ip->i_extsize); + } else if (xfs_inode_has_bigrtalloc(ip)) { startoffset_fsb = xfs_rtb_roundup_rtx(mp, startoffset_fsb); endoffset_fsb = xfs_rtb_rounddown_rtx(mp, endoffset_fsb); } From patchwork Fri Jun 7 14:39:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690202 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3DD24C27C53 for ; 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For forcealign, this would mean ignoring alignment guaranteed, so don't do this. Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_bmap.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 2b6d5ebd8b4f..b3552cb5fc8f 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3492,11 +3492,15 @@ xfs_bmap_process_allocated_extent( * original request as possible. Free space is apparently * very fragmented so we're unlikely to be able to satisfy the * hints anyway. + * However, for an inode with forcealign, continue with the + * found offset as we need to honour the alignment hint. */ - if (ap->length <= orig_length) - ap->offset = orig_offset; - else if (ap->offset + ap->length < orig_offset + orig_length) - ap->offset = orig_offset + orig_length - ap->length; + if (!xfs_inode_has_forcealign(ap->ip)) { + if (ap->length <= orig_length) + ap->offset = orig_offset; + else if (ap->offset + ap->length < orig_offset + orig_length) + ap->offset = orig_offset + orig_length - ap->length; + } xfs_bmap_alloc_account(ap); } From patchwork Fri Jun 7 14:39:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690203 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9C0AAC27C5F for ; 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Wong" Enable this feature. Signed-off-by: "Darrick J. Wong" Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_format.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index b48cd75d34a6..42e1f80206ab 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -358,7 +358,8 @@ xfs_sb_has_compat_feature( (XFS_SB_FEAT_RO_COMPAT_FINOBT | \ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \ XFS_SB_FEAT_RO_COMPAT_REFLINK| \ - XFS_SB_FEAT_RO_COMPAT_INOBTCNT) + XFS_SB_FEAT_RO_COMPAT_INOBTCNT | \ + XFS_SB_FEAT_RO_COMPAT_FORCEALIGN) #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL static inline bool xfs_sb_has_ro_compat_feature( From patchwork Fri Jun 7 14:39:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690204 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 90839C27C53 for ; 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This is a file attribute that mirrors an ondisk inode flag. Actual support for untorn file writes (for now) depends on both the iflag and the underlying storage devices, which we can only really check at statx and pwritev2() time. This is the same story as FS_XFLAG_DAX, which signals to the fs that we should try to enable the fsdax IO path on the file (instead of the regular page cache), but applications have to query STAT_ATTR_DAX to find out if they really got that IO path. Signed-off-by: John Garry --- include/uapi/linux/fs.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 6a6bcb53594a..0eae5383a0b4 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -160,6 +160,7 @@ struct fsxattr { #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ /* data extent mappings for regular files must be aligned to extent size hint */ #define FS_XFLAG_FORCEALIGN 0x00020000 +#define FS_XFLAG_ATOMICWRITES 0x00040000 /* atomic writes enabled */ #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is From patchwork Fri Jun 7 14:39:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690205 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B5589C27C53 for ; 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We rely on the FS to guarantee extent alignment, such that an atomic write should never straddle two or more extents. The FS should also check for validity of an atomic write length/alignment. Signed-off-by: John Garry --- fs/iomap/direct-io.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index 5be8d886ab4a..4f2a4569aaa7 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -256,7 +256,7 @@ static void iomap_dio_zero(const struct iomap_iter *iter, struct iomap_dio *dio, * clearing the WRITE_THROUGH flag in the dio request. */ static inline blk_opf_t iomap_dio_bio_opflags(struct iomap_dio *dio, - const struct iomap *iomap, bool use_fua) + const struct iomap *iomap, bool use_fua, bool is_atomic) { blk_opf_t opflags = REQ_SYNC | REQ_IDLE; @@ -268,6 +268,8 @@ static inline blk_opf_t iomap_dio_bio_opflags(struct iomap_dio *dio, opflags |= REQ_FUA; else dio->flags &= ~IOMAP_DIO_WRITE_THROUGH; + if (is_atomic) + opflags |= REQ_ATOMIC; return opflags; } @@ -275,6 +277,7 @@ static inline blk_opf_t iomap_dio_bio_opflags(struct iomap_dio *dio, static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, struct iomap_dio *dio) { + bool is_atomic = dio->iocb->ki_flags & IOCB_ATOMIC; const struct iomap *iomap = &iter->iomap; struct inode *inode = iter->inode; u64 io_block_size = iomap->io_block_size; @@ -373,7 +376,7 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, * can set up the page vector appropriately for a ZONE_APPEND * operation. */ - bio_opf = iomap_dio_bio_opflags(dio, iomap, use_fua); + bio_opf = iomap_dio_bio_opflags(dio, iomap, use_fua, is_atomic); nr_pages = bio_iov_vecs_to_alloc(dio->submit.iter, BIO_MAX_VECS); do { @@ -406,6 +409,17 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter, } n = bio->bi_iter.bi_size; + if (is_atomic && (n != orig_count)) { + /* + * This bio should have covered the complete length, + * which it doesn't, so error. 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Current kernel support for atomic writes is based on HW support (for atomic writes). As such, it is required to ensure extent alignment with atomic_write_unit_max so that an atomic write can result in a single HW-compliant IO operation. rtvol also guarantees extent alignment, but we are basing support initially on forcealign, which is not supported for rtvol yet. Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_format.h | 11 ++++++-- fs/xfs/libxfs/xfs_inode_buf.c | 52 +++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_inode_buf.h | 2 ++ fs/xfs/libxfs/xfs_sb.c | 2 ++ fs/xfs/xfs_buf.c | 15 +++++++++- fs/xfs/xfs_buf.h | 4 ++- fs/xfs/xfs_buf_mem.c | 2 +- fs/xfs/xfs_inode.c | 9 ++++++ fs/xfs/xfs_inode.h | 5 ++++ fs/xfs/xfs_ioctl.c | 36 ++++++++++++++++++++++++ fs/xfs/xfs_mount.h | 2 ++ fs/xfs/xfs_super.c | 4 +++ 12 files changed, 139 insertions(+), 5 deletions(-) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 42e1f80206ab..e20880b6aff7 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -354,12 +354,16 @@ xfs_sb_has_compat_feature( #define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */ #define XFS_SB_FEAT_RO_COMPAT_INOBTCNT (1 << 3) /* inobt block counts */ #define XFS_SB_FEAT_RO_COMPAT_FORCEALIGN (1 << 30) /* aligned file data extents */ +#define XFS_SB_FEAT_RO_COMPAT_ATOMICWRITES (1 << 31) /* atomicwrites enabled */ + #define XFS_SB_FEAT_RO_COMPAT_ALL \ (XFS_SB_FEAT_RO_COMPAT_FINOBT | \ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \ XFS_SB_FEAT_RO_COMPAT_REFLINK| \ XFS_SB_FEAT_RO_COMPAT_INOBTCNT | \ - XFS_SB_FEAT_RO_COMPAT_FORCEALIGN) + XFS_SB_FEAT_RO_COMPAT_FORCEALIGN | \ + XFS_SB_FEAT_RO_COMPAT_ATOMICWRITES) + #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL static inline bool xfs_sb_has_ro_compat_feature( @@ -1098,6 +1102,7 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_NREXT64_BIT 4 /* large extent counters */ /* data extent mappings for regular files must be aligned to extent size hint */ #define XFS_DIFLAG2_FORCEALIGN_BIT 5 +#define XFS_DIFLAG2_ATOMICWRITES_BIT 6 #define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT) #define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT) @@ -1105,10 +1110,12 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_BIGTIME (1 << XFS_DIFLAG2_BIGTIME_BIT) #define XFS_DIFLAG2_NREXT64 (1 << XFS_DIFLAG2_NREXT64_BIT) #define XFS_DIFLAG2_FORCEALIGN (1 << XFS_DIFLAG2_FORCEALIGN_BIT) +#define XFS_DIFLAG2_ATOMICWRITES (1 << XFS_DIFLAG2_ATOMICWRITES_BIT) #define XFS_DIFLAG2_ANY \ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ - XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_FORCEALIGN) + XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_FORCEALIGN | \ + XFS_DIFLAG2_ATOMICWRITES) static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip) { diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index b2c5f466c1a9..046e72481b60 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -178,7 +178,10 @@ xfs_inode_from_disk( struct xfs_inode *ip, struct xfs_dinode *from) { + struct xfs_buftarg *target = xfs_inode_buftarg(ip); struct inode *inode = VFS_I(ip); + struct xfs_mount *mp = ip->i_mount; + struct xfs_sb *sbp = &mp->m_sb; int error; xfs_failaddr_t fa; @@ -261,6 +264,13 @@ xfs_inode_from_disk( } if (xfs_is_reflink_inode(ip)) xfs_ifork_init_cow(ip); + + if (xfs_inode_has_atomicwrites(ip)) { + if (sbp->sb_blocksize < target->bt_bdev_awu_min || + sbp->sb_blocksize * ip->i_extsize > target->bt_bdev_awu_max) + ip->i_diflags2 &= ~XFS_DIFLAG2_ATOMICWRITES; + } + return 0; out_destroy_data_fork: @@ -653,6 +663,13 @@ xfs_dinode_verify( return fa; } + if (flags2 & XFS_DIFLAG2_ATOMICWRITES) { + fa = xfs_inode_validate_atomicwrites(mp, + be32_to_cpu(dip->di_extsize), flags2); + if (fa) + return fa; + } + return NULL; } @@ -864,3 +881,38 @@ xfs_inode_validate_forcealign( return NULL; } + +xfs_failaddr_t +xfs_inode_validate_atomicwrites( + struct xfs_mount *mp, + uint32_t extsize, + uint64_t flags2) +{ + /* superblock rocompat feature flag */ + if (!xfs_has_atomicwrites(mp)) + return __this_address; + + /* + * forcealign is required, so rely on sanity checks in + * xfs_inode_validate_forcealign() + */ + if (!(flags2 & XFS_DIFLAG2_FORCEALIGN)) + return __this_address; + + /* extsize must be a power-of-2 */ + if (!is_power_of_2(extsize)) + return __this_address; + + /* Required to guarnatee data block alignment */ + if (mp->m_sb.sb_agblocks % extsize) + return __this_address; + + /* Requires stripe unit+width be a multiple of extsize */ + if (mp->m_dalign && (mp->m_dalign % extsize)) + return __this_address; + + if (mp->m_swidth && (mp->m_swidth % extsize)) + return __this_address; + + return NULL; +} diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h index b8b65287b037..c7613b1a05f2 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.h +++ b/fs/xfs/libxfs/xfs_inode_buf.h @@ -36,6 +36,8 @@ xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp, xfs_failaddr_t xfs_inode_validate_forcealign(struct xfs_mount *mp, uint32_t extsize, uint32_t cowextsize, uint16_t mode, uint16_t flags, uint64_t flags2); +xfs_failaddr_t xfs_inode_validate_atomicwrites(struct xfs_mount *mp, + uint32_t extsize, uint64_t flags2); static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv) { diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 515f5dd23b6d..aee285899ffc 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -166,6 +166,8 @@ xfs_sb_version_to_features( features |= XFS_FEAT_INOBTCNT; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FORCEALIGN) features |= XFS_FEAT_FORCEALIGN; + if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_ATOMICWRITES) + features |= XFS_FEAT_ATOMICWRITES; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) features |= XFS_FEAT_FTYPE; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index aa4dbda7b536..44bee3e2b2bb 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -2060,6 +2060,8 @@ int xfs_init_buftarg( struct xfs_buftarg *btp, size_t logical_sectorsize, + unsigned int awu_min, + unsigned int awu_max, const char *descr) { /* Set up device logical sector size mask */ @@ -2086,6 +2088,9 @@ xfs_init_buftarg( btp->bt_shrinker->scan_objects = xfs_buftarg_shrink_scan; btp->bt_shrinker->private_data = btp; shrinker_register(btp->bt_shrinker); + + btp->bt_bdev_awu_min = awu_min; + btp->bt_bdev_awu_max = awu_max; return 0; out_destroy_io_count: @@ -2102,6 +2107,7 @@ xfs_alloc_buftarg( { struct xfs_buftarg *btp; const struct dax_holder_operations *ops = NULL; + unsigned int awu_min = 0, awu_max = 0; #if defined(CONFIG_FS_DAX) && defined(CONFIG_MEMORY_FAILURE) ops = &xfs_dax_holder_operations; @@ -2115,6 +2121,13 @@ xfs_alloc_buftarg( btp->bt_daxdev = fs_dax_get_by_bdev(btp->bt_bdev, &btp->bt_dax_part_off, mp, ops); + if (bdev_can_atomic_write(btp->bt_bdev)) { + struct request_queue *q = bdev_get_queue(btp->bt_bdev); + + awu_min = queue_atomic_write_unit_min_bytes(q); + awu_max = queue_atomic_write_unit_max_bytes(q); + } + /* * When allocating the buftargs we have not yet read the super block and * thus don't know the file system sector size yet. @@ -2122,7 +2135,7 @@ xfs_alloc_buftarg( if (xfs_setsize_buftarg(btp, bdev_logical_block_size(btp->bt_bdev))) goto error_free; if (xfs_init_buftarg(btp, bdev_logical_block_size(btp->bt_bdev), - mp->m_super->s_id)) + awu_min, awu_max, mp->m_super->s_id)) goto error_free; return btp; diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index b1580644501f..3bcd8137d739 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -124,6 +124,8 @@ struct xfs_buftarg { struct percpu_counter bt_io_count; struct ratelimit_state bt_ioerror_rl; + unsigned int bt_bdev_awu_min, bt_bdev_awu_max; + /* built-in cache, if we're not using the perag one */ struct xfs_buf_cache bt_cache[]; }; @@ -393,7 +395,7 @@ bool xfs_verify_magic16(struct xfs_buf *bp, __be16 dmagic); /* for xfs_buf_mem.c only: */ int xfs_init_buftarg(struct xfs_buftarg *btp, size_t logical_sectorsize, - const char *descr); + unsigned int awu_min, unsigned int awu_max, const char *descr); void xfs_destroy_buftarg(struct xfs_buftarg *btp); #endif /* __XFS_BUF_H__ */ diff --git a/fs/xfs/xfs_buf_mem.c b/fs/xfs/xfs_buf_mem.c index 9bb2d24de709..af48a8da2f0f 100644 --- a/fs/xfs/xfs_buf_mem.c +++ b/fs/xfs/xfs_buf_mem.c @@ -93,7 +93,7 @@ xmbuf_alloc( btp->bt_meta_sectorsize = XMBUF_BLOCKSIZE; btp->bt_meta_sectormask = XMBUF_BLOCKSIZE - 1; - error = xfs_init_buftarg(btp, XMBUF_BLOCKSIZE, descr); + error = xfs_init_buftarg(btp, XMBUF_BLOCKSIZE, 0, 0, descr); if (error) goto out_bcache; diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 9c0ae5c3682e..e8d7ad4e6d38 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -610,6 +610,8 @@ xfs_ip2xflags( flags |= FS_XFLAG_COWEXTSIZE; if (ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) flags |= FS_XFLAG_FORCEALIGN; + if (ip->i_diflags2 & XFS_DIFLAG2_ATOMICWRITES) + flags |= FS_XFLAG_ATOMICWRITES; } if (xfs_inode_has_attr_fork(ip)) @@ -758,6 +760,13 @@ xfs_inode_inherit_flags2( if (failaddr) ip->i_diflags2 &= ~XFS_DIFLAG2_FORCEALIGN; } + + if (ip->i_diflags2 & XFS_DIFLAG2_ATOMICWRITES) { + failaddr = xfs_inode_validate_atomicwrites(ip->i_mount, + ip->i_extsize, ip->i_diflags2); + if (failaddr) + ip->i_diflags2 &= ~XFS_DIFLAG2_ATOMICWRITES; + } } /* diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 7005ea29bf11..1e8a8778ce0b 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -334,6 +334,11 @@ static inline bool xfs_inode_has_forcealign(struct xfs_inode *ip) return ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN; } +static inline bool xfs_inode_has_atomicwrites(struct xfs_inode *ip) +{ + return ip->i_diflags2 & XFS_DIFLAG2_ATOMICWRITES; +} + /* * Decide if this file is a realtime file whose data allocation unit is larger * than a single filesystem block. diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 5eff8fd9fa3e..2877553b6151 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -527,6 +527,8 @@ xfs_flags2diflags2( di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; if (xflags & FS_XFLAG_FORCEALIGN) di_flags2 |= XFS_DIFLAG2_FORCEALIGN; + if (xflags & FS_XFLAG_ATOMICWRITES) + di_flags2 |= XFS_DIFLAG2_ATOMICWRITES; return di_flags2; } @@ -567,15 +569,45 @@ xfs_ioctl_setattr_forcealign( return 0; } +static int +xfs_ioctl_setattr_atomicwrites( + struct xfs_inode *ip, + struct fileattr *fa, + struct xfs_buftarg *target) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_sb *sbp = &mp->m_sb; + + if (!xfs_has_atomicwrites(mp)) + return -EINVAL; + + if (!(fa->fsx_xflags & FS_XFLAG_FORCEALIGN)) + return -EINVAL; + + if (!is_power_of_2(fa->fsx_extsize)) + return -EINVAL; + + /* bdev can actually support atomic writes range required */ + if (target->bt_bdev_awu_min > sbp->sb_blocksize) + return -EINVAL; + + if (target->bt_bdev_awu_max < fa->fsx_extsize) + return -EINVAL; + + return 0; +} + static int xfs_ioctl_setattr_xflags( struct xfs_trans *tp, struct xfs_inode *ip, struct fileattr *fa) { + struct xfs_buftarg *target = xfs_inode_buftarg(ip); struct xfs_mount *mp = ip->i_mount; bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME); bool forcealign = fa->fsx_xflags & FS_XFLAG_FORCEALIGN; + bool atomicwrites = fa->fsx_xflags & FS_XFLAG_ATOMICWRITES; uint64_t i_flags2; /* Can't change RT or forcealign flags if any extents are allocated. */ @@ -604,6 +636,10 @@ xfs_ioctl_setattr_xflags( if (forcealign && (xfs_ioctl_setattr_forcealign(ip, fa) < 0)) return -EINVAL; + if (atomicwrites && + (xfs_ioctl_setattr_atomicwrites(ip, fa, target) < 0)) + return -EINVAL; + ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); ip->i_diflags2 = i_flags2; diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 30228fea908d..0c5a3ae3cdaf 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -300,6 +300,7 @@ typedef struct xfs_mount { #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ #define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */ #define XFS_FEAT_FORCEALIGN (1ULL << 28) /* aligned file data extents */ +#define XFS_FEAT_ATOMICWRITES (1ULL << 29) /* atomic writes support */ /* Mount features */ #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ @@ -387,6 +388,7 @@ __XFS_HAS_V4_FEAT(v3inodes, V3INODES) __XFS_HAS_V4_FEAT(crc, CRC) __XFS_HAS_V4_FEAT(pquotino, PQUOTINO) __XFS_HAS_FEAT(forcealign, FORCEALIGN) +__XFS_HAS_FEAT(atomicwrites, ATOMICWRITES) /* * Mount features diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 852bbfb21506..85799bd12e92 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1725,6 +1725,10 @@ xfs_fs_fill_super( xfs_warn(mp, "EXPERIMENTAL forced data extent alignment feature in use. Use at your own risk!"); + if (xfs_has_atomicwrites(mp)) + xfs_warn(mp, +"EXPERIMENTAL atomicwrites feature in use. Use at your own risk!"); + if (xfs_has_reflink(mp)) { if (mp->m_sb.sb_rblocks) { xfs_alert(mp, From patchwork Fri Jun 7 14:39:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13690206 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F1B95C27C5F for ; Fri, 7 Jun 2024 14:41:19 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1sFamN-0003QR-1o; Fri, 07 Jun 2024 14:41:19 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1sFamL-0003Q2-DH for linux-f2fs-devel@lists.sourceforge.net; 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For simplicity, currently we limit the min at the FS block size, but a lower limit could be supported in future. This is required by iomap DIO. The atomic write unit min and max is limited by the guaranteed extent alignment for the inode. Signed-off-by: John Garry --- fs/xfs/xfs_iops.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index ff222827e550..d4c957793e07 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -563,6 +563,27 @@ xfs_stat_blksize( return PAGE_SIZE; } +static void +xfs_get_atomic_write_attr( + struct xfs_inode *ip, + unsigned int *unit_min, + unsigned int *unit_max) +{ + struct xfs_buftarg *target = xfs_inode_buftarg(ip); + struct xfs_mount *mp = ip->i_mount; + struct xfs_sb *sbp = &mp->m_sb; + unsigned int extsz_bytes = XFS_FSB_TO_B(mp, ip->i_extsize); + + if (!xfs_inode_has_atomicwrites(ip)) { + *unit_min = 0; + *unit_max = 0; + return; + } + + *unit_min = sbp->sb_blocksize; + *unit_max = min(target->bt_bdev_awu_max, extsz_bytes); +} + STATIC int xfs_vn_getattr( struct mnt_idmap *idmap, @@ -636,6 +657,13 @@ xfs_vn_getattr( stat->dio_mem_align = bdev_dma_alignment(bdev) + 1; stat->dio_offset_align = bdev_logical_block_size(bdev); 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Since we require extent alignment for atomic writes, this effectively also enforces that the BIO which iomap produces is aligned. For an IOCB with IOCB_ATOMIC set to get as far as xfs_file_dio_write(), FMODE_CAN_ATOMIC_WRITE will need to be set for the file; for this, FORCEALIGN and also ATOMICWRITES flags would also need to be set for the inode. Signed-off-by: John Garry --- fs/xfs/xfs_file.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 24fe3c2e03da..eeb267ae2bf2 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -695,12 +695,21 @@ xfs_file_dio_write( struct kiocb *iocb, struct iov_iter *from) { - struct xfs_inode *ip = XFS_I(file_inode(iocb->ki_filp)); + struct inode *inode = file_inode(iocb->ki_filp); + struct xfs_inode *ip = XFS_I(inode); struct xfs_buftarg *target = xfs_inode_buftarg(ip); size_t count = iov_iter_count(from); + struct xfs_mount *mp = ip->i_mount; bool unaligned; u64 unitsize; + if (iocb->ki_flags & IOCB_ATOMIC) { + if (!generic_atomic_write_valid_size(iocb->ki_pos, from, + i_blocksize(inode), XFS_FSB_TO_B(mp, ip->i_extsize))) { + return -EINVAL; + } + } + /* direct I/O must be aligned to device logical sector size */ if ((iocb->ki_pos | count) & target->bt_logical_sectormask) return -EINVAL; From patchwork Fri Jun 7 14:39:19 2024 Content-Type: text/plain; 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Only direct IO is currently supported, so check for that also. We rely on the block layer to reject atomic writes which exceed the bdev request_queue limits, so don't bother checking any such thing here. Signed-off-by: John Garry --- fs/xfs/xfs_file.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index eeb267ae2bf2..88ab743929fb 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1172,6 +1172,18 @@ xfs_file_remap_range( return remapped > 0 ? remapped : ret; } +static bool xfs_file_open_can_atomicwrite( + struct inode *inode, + struct file *file) +{ + struct xfs_inode *ip = XFS_I(inode); + + if (!(file->f_flags & O_DIRECT)) + return false; + + return xfs_inode_has_atomicwrites(ip); +} + STATIC int xfs_file_open( struct inode *inode, @@ -1180,6 +1192,8 @@ xfs_file_open( if (xfs_is_shutdown(XFS_M(inode->i_sb))) return -EIO; file->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT; + if (xfs_file_open_can_atomicwrite(inode, file)) + file->f_mode |= FMODE_CAN_ATOMIC_WRITE; return generic_file_open(inode, file); }