* [PATCH 0/3 v2] xfs: clean up buffer cache disk addressing @ 2021-08-19 0:00 Dave Chinner 2021-08-19 0:00 ` [PATCH 1/3] xfs: introduce xfs_buf_daddr() Dave Chinner ` (2 more replies) 0 siblings, 3 replies; 12+ messages in thread From: Dave Chinner @ 2021-08-19 0:00 UTC (permalink / raw) To: linux-xfs Over time, we've moved from using bp->b_bn as the physical disk address for a buffer to using the address of the first buffer map attached to the buffer. This can be seen by the implementation of XFS_BUF_ADDR() macro: #define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) The bp->b_bn value is now used as the buffer cache index for the buffer, and it is always set to XFS_BUF_DADDR_NULL for uncached buffers. Hence code that uses bp->b_bn for the physical address of the buffer will not do the right thing when passed an uncached buffer. THis series of patches addresses this problem. It adds a helper function xfs_buf_daddr() to extract the physical address of the buffer from it, and replaces all the open coded bp->b_bn accesses and the XFS_BUF_ADDR() users to use it. It then renames b_bn to b_index and converts all the internal cache lookup code to use b_index rather than b_bn. The result is that all code now uses xfs_buf_daddr() where physical addresses are required, and the cache index variable isn't named in a manner that engenders external use of access. The changes end up being relatively small, and the impact on userspace outside libxfs is even smaller (only a couple of dozen references to b_bn or XFS_BUF_ADDR). Version 2 - rebase on 5.14-rc4 + for-next + "xfs: rework feature flags v3" - use __be64 type for comparison in xfs_btree_new_iroot() - rename b_index to b_rhash_key - fix typos and wording in commit messages Version 1 - based on 5.14-rc4 + for-next - https://lore.kernel.org/linux-xfs/20210810052851.42312-1-david@fromorbit.com/ ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 1/3] xfs: introduce xfs_buf_daddr() 2021-08-19 0:00 [PATCH 0/3 v2] xfs: clean up buffer cache disk addressing Dave Chinner @ 2021-08-19 0:00 ` Dave Chinner 2021-08-19 0:00 ` [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() Dave Chinner 2021-08-19 0:00 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 2 siblings, 0 replies; 12+ messages in thread From: Dave Chinner @ 2021-08-19 0:00 UTC (permalink / raw) To: linux-xfs From: Dave Chinner <dchinner@redhat.com> Introduce a helper function xfs_buf_daddr() to extract the disk address of the buffer from the struct xfs_buf. This will replace direct accesses to bp->b_bn and bp->b_maps[0].bm_bn, as well as the XFS_BUF_ADDR() macro. This patch introduces the helper function and replaces all uses of XFS_BUF_ADDR() as this is just a simple sed replacement. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> --- fs/xfs/libxfs/xfs_alloc_btree.c | 2 +- fs/xfs/libxfs/xfs_attr.c | 4 ++-- fs/xfs/libxfs/xfs_bmap.c | 4 ++-- fs/xfs/libxfs/xfs_bmap_btree.c | 2 +- fs/xfs/libxfs/xfs_btree.c | 10 +++++----- fs/xfs/libxfs/xfs_ialloc_btree.c | 2 +- fs/xfs/libxfs/xfs_inode_buf.c | 2 +- fs/xfs/libxfs/xfs_refcount_btree.c | 2 +- fs/xfs/libxfs/xfs_rmap_btree.c | 2 +- fs/xfs/libxfs/xfs_sb.c | 2 +- fs/xfs/scrub/btree.c | 4 ++-- fs/xfs/xfs_attr_inactive.c | 2 +- fs/xfs/xfs_buf.c | 2 +- fs/xfs/xfs_buf.h | 6 +++++- fs/xfs/xfs_trans_buf.c | 2 +- 15 files changed, 26 insertions(+), 22 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c index 81a8e1d0cd90..7f69387609d3 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.c +++ b/fs/xfs/libxfs/xfs_alloc_btree.c @@ -87,7 +87,7 @@ xfs_allocbt_free_block( xfs_agblock_t bno; int error; - bno = xfs_daddr_to_agbno(cur->bc_mp, XFS_BUF_ADDR(bp)); + bno = xfs_daddr_to_agbno(cur->bc_mp, xfs_buf_daddr(bp)); error = xfs_alloc_put_freelist(cur->bc_tp, agbp, NULL, bno, 1); if (error) return error; diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index 23b50bcb5e7f..fbc9d816882c 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -1540,7 +1540,7 @@ xfs_attr_fillstate(xfs_da_state_t *state) ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->bp) { - blk->disk_blkno = XFS_BUF_ADDR(blk->bp); + blk->disk_blkno = xfs_buf_daddr(blk->bp); blk->bp = NULL; } else { blk->disk_blkno = 0; @@ -1555,7 +1555,7 @@ xfs_attr_fillstate(xfs_da_state_t *state) ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->bp) { - blk->disk_blkno = XFS_BUF_ADDR(blk->bp); + blk->disk_blkno = xfs_buf_daddr(blk->bp); blk->bp = NULL; } else { blk->disk_blkno = 0; diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 75354023cea7..d0bfa9a1f549 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -242,7 +242,7 @@ xfs_bmap_get_bp( for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { if (!cur->bc_bufs[i]) break; - if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) + if (xfs_buf_daddr(cur->bc_bufs[i]) == bno) return cur->bc_bufs[i]; } @@ -251,7 +251,7 @@ xfs_bmap_get_bp( struct xfs_buf_log_item *bip = (struct xfs_buf_log_item *)lip; if (bip->bli_item.li_type == XFS_LI_BUF && - XFS_BUF_ADDR(bip->bli_buf) == bno) + xfs_buf_daddr(bip->bli_buf) == bno) return bip->bli_buf; } diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c index c04b2a697b29..e0ae95c7b379 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.c +++ b/fs/xfs/libxfs/xfs_bmap_btree.c @@ -282,7 +282,7 @@ xfs_bmbt_free_block( struct xfs_mount *mp = cur->bc_mp; struct xfs_inode *ip = cur->bc_ino.ip; struct xfs_trans *tp = cur->bc_tp; - xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); + xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, xfs_buf_daddr(bp)); struct xfs_owner_info oinfo; xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, cur->bc_ino.whichfork); diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 393c9438d5a7..dc704c2b22cb 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -420,7 +420,7 @@ xfs_btree_dup_cursor( bp = cur->bc_bufs[i]; if (bp) { error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, - XFS_BUF_ADDR(bp), mp->m_bsize, + xfs_buf_daddr(bp), mp->m_bsize, 0, &bp, cur->bc_ops->buf_ops); if (error) { @@ -1192,10 +1192,10 @@ xfs_btree_buf_to_ptr( { if (cur->bc_flags & XFS_BTREE_LONG_PTRS) ptr->l = cpu_to_be64(XFS_DADDR_TO_FSB(cur->bc_mp, - XFS_BUF_ADDR(bp))); + xfs_buf_daddr(bp))); else { ptr->s = cpu_to_be32(xfs_daddr_to_agbno(cur->bc_mp, - XFS_BUF_ADDR(bp))); + xfs_buf_daddr(bp))); } } @@ -1739,7 +1739,7 @@ xfs_btree_lookup_get_block( error = xfs_btree_ptr_to_daddr(cur, pp, &daddr); if (error) return error; - if (bp && XFS_BUF_ADDR(bp) == daddr) { + if (bp && xfs_buf_daddr(bp) == daddr) { *blkp = XFS_BUF_TO_BLOCK(bp); return 0; } @@ -4499,7 +4499,7 @@ xfs_btree_sblock_verify( return __this_address; /* sibling pointer verification */ - agno = xfs_daddr_to_agno(mp, XFS_BUF_ADDR(bp)); + agno = xfs_daddr_to_agno(mp, xfs_buf_daddr(bp)); if (block->bb_u.s.bb_leftsib != cpu_to_be32(NULLAGBLOCK) && !xfs_verify_agbno(mp, agno, be32_to_cpu(block->bb_u.s.bb_leftsib))) return __this_address; diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c index f1384c280059..65a94741ce16 100644 --- a/fs/xfs/libxfs/xfs_ialloc_btree.c +++ b/fs/xfs/libxfs/xfs_ialloc_btree.c @@ -156,7 +156,7 @@ __xfs_inobt_free_block( { xfs_inobt_mod_blockcount(cur, -1); return xfs_free_extent(cur->bc_tp, - XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp)), 1, + XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp)), 1, &XFS_RMAP_OINFO_INOBT, resv); } diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index 036f909ff7a6..83ba63b4ace4 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -48,7 +48,7 @@ xfs_inode_buf_verify( /* * Validate the magic number and version of every inode in the buffer */ - agno = xfs_daddr_to_agno(mp, XFS_BUF_ADDR(bp)); + agno = xfs_daddr_to_agno(mp, xfs_buf_daddr(bp)); ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock; for (i = 0; i < ni; i++) { int di_ok; diff --git a/fs/xfs/libxfs/xfs_refcount_btree.c b/fs/xfs/libxfs/xfs_refcount_btree.c index 31ce9d2d45e1..fd47dc934dae 100644 --- a/fs/xfs/libxfs/xfs_refcount_btree.c +++ b/fs/xfs/libxfs/xfs_refcount_btree.c @@ -102,7 +102,7 @@ xfs_refcountbt_free_block( struct xfs_mount *mp = cur->bc_mp; struct xfs_buf *agbp = cur->bc_ag.agbp; struct xfs_agf *agf = agbp->b_addr; - xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); + xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, xfs_buf_daddr(bp)); int error; trace_xfs_refcountbt_free_block(cur->bc_mp, cur->bc_ag.pag->pag_agno, diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c index 921651fb4b1b..f0fe7aa09a43 100644 --- a/fs/xfs/libxfs/xfs_rmap_btree.c +++ b/fs/xfs/libxfs/xfs_rmap_btree.c @@ -122,7 +122,7 @@ xfs_rmapbt_free_block( xfs_agblock_t bno; int error; - bno = xfs_daddr_to_agbno(cur->bc_mp, XFS_BUF_ADDR(bp)); + bno = xfs_daddr_to_agbno(cur->bc_mp, xfs_buf_daddr(bp)); trace_xfs_rmapbt_free_block(cur->bc_mp, pag->pag_agno, bno, 1); be32_add_cpu(&agf->agf_rmap_blocks, -1); diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 197093acb828..b1c5ec1bd200 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -192,7 +192,7 @@ xfs_validate_sb_write( * secondary superblocks, so allow this usage to continue because * we never read counters from such superblocks. */ - if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && + if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && (sbp->sb_fdblocks > sbp->sb_dblocks || !xfs_verify_icount(mp, sbp->sb_icount) || sbp->sb_ifree > sbp->sb_icount)) { diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c index c044e0a8da7f..fd832f103fa4 100644 --- a/fs/xfs/scrub/btree.c +++ b/fs/xfs/scrub/btree.c @@ -435,12 +435,12 @@ xchk_btree_check_owner( if (!co) return -ENOMEM; co->level = level; - co->daddr = XFS_BUF_ADDR(bp); + co->daddr = xfs_buf_daddr(bp); list_add_tail(&co->list, &bs->to_check); return 0; } - return xchk_btree_check_block_owner(bs, level, XFS_BUF_ADDR(bp)); + return xchk_btree_check_block_owner(bs, level, xfs_buf_daddr(bp)); } /* Decide if we want to check minrecs of a btree block in the inode root. */ diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c index aaa7e66c42d7..d8fdde206867 100644 --- a/fs/xfs/xfs_attr_inactive.c +++ b/fs/xfs/xfs_attr_inactive.c @@ -177,7 +177,7 @@ xfs_attr3_node_inactive( return error; /* save for re-read later */ - child_blkno = XFS_BUF_ADDR(child_bp); + child_blkno = xfs_buf_daddr(child_bp); /* * Invalidate the subtree, however we have to. diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 82dd9bfa4265..c1bb6e41595b 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1335,7 +1335,7 @@ xfs_buf_ioerror_alert( { xfs_buf_alert_ratelimited(bp, "XFS: metadata IO error", "metadata I/O error in \"%pS\" at daddr 0x%llx len %d error %d", - func, (uint64_t)XFS_BUF_ADDR(bp), + func, (uint64_t)xfs_buf_daddr(bp), bp->b_length, -bp->b_error); } diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 37c9004f11de..6db2fba44b46 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -311,9 +311,13 @@ extern void xfs_buf_terminate(void); * In future, uncached buffers will pass the block number directly to the io * request function and hence these macros will go away at that point. */ -#define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) #define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) +static inline xfs_daddr_t xfs_buf_daddr(struct xfs_buf *bp) +{ + return bp->b_maps[0].bm_bn; +} + void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref); /* diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index 4ff274ce31c4..6549e50d852c 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -38,7 +38,7 @@ xfs_trans_buf_item_match( blip = (struct xfs_buf_log_item *)lip; if (blip->bli_item.li_type == XFS_LI_BUF && blip->bli_buf->b_target == target && - XFS_BUF_ADDR(blip->bli_buf) == map[0].bm_bn && + xfs_buf_daddr(blip->bli_buf) == map[0].bm_bn && blip->bli_buf->b_length == len) { ASSERT(blip->bli_buf->b_map_count == nmaps); return blip->bli_buf; -- 2.31.1 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() 2021-08-19 0:00 [PATCH 0/3 v2] xfs: clean up buffer cache disk addressing Dave Chinner 2021-08-19 0:00 ` [PATCH 1/3] xfs: introduce xfs_buf_daddr() Dave Chinner @ 2021-08-19 0:00 ` Dave Chinner 2021-08-19 2:03 ` Darrick J. Wong 2021-08-19 0:00 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 2 siblings, 1 reply; 12+ messages in thread From: Dave Chinner @ 2021-08-19 0:00 UTC (permalink / raw) To: linux-xfs From: Dave Chinner <dchinner@redhat.com> Stop directly referencing b_bn in code outside the buffer cache, as b_bn is supposed to be used only as an internal cache index. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- fs/xfs/libxfs/xfs_ag.c | 1 - fs/xfs/libxfs/xfs_attr_leaf.c | 4 ++-- fs/xfs/libxfs/xfs_attr_remote.c | 8 ++++---- fs/xfs/libxfs/xfs_bmap.c | 2 +- fs/xfs/libxfs/xfs_btree.c | 25 +++++++++++++------------ fs/xfs/libxfs/xfs_da_btree.c | 8 ++++---- fs/xfs/libxfs/xfs_dir2_block.c | 4 ++-- fs/xfs/libxfs/xfs_dir2_data.c | 4 ++-- fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++-- fs/xfs/libxfs/xfs_dir2_node.c | 6 +++--- fs/xfs/libxfs/xfs_inode_buf.c | 2 +- fs/xfs/libxfs/xfs_sb.c | 2 +- fs/xfs/libxfs/xfs_symlink_remote.c | 4 ++-- fs/xfs/scrub/bitmap.c | 4 ++-- fs/xfs/scrub/common.c | 8 ++++---- fs/xfs/scrub/trace.c | 8 ++++---- fs/xfs/xfs_attr_inactive.c | 4 ++-- fs/xfs/xfs_buf_item.c | 2 +- fs/xfs/xfs_buf_item_recover.c | 2 +- fs/xfs/xfs_error.c | 4 ++-- fs/xfs/xfs_trace.h | 13 +++++-------- 21 files changed, 58 insertions(+), 61 deletions(-) diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c index 92033c4672a4..005abfd9fd34 100644 --- a/fs/xfs/libxfs/xfs_ag.c +++ b/fs/xfs/libxfs/xfs_ag.c @@ -313,7 +313,6 @@ xfs_get_aghdr_buf( if (error) return error; - bp->b_bn = blkno; bp->b_maps[0].bm_bn = blkno; bp->b_ops = ops; diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c index 7975b36fe6a3..e1d11e314228 100644 --- a/fs/xfs/libxfs/xfs_attr_leaf.c +++ b/fs/xfs/libxfs/xfs_attr_leaf.c @@ -1206,7 +1206,7 @@ xfs_attr3_leaf_to_node( memcpy(bp2->b_addr, bp1->b_addr, args->geo->blksize); if (xfs_has_crc(mp)) { struct xfs_da3_blkinfo *hdr3 = bp2->b_addr; - hdr3->blkno = cpu_to_be64(bp2->b_bn); + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp2)); } xfs_trans_log_buf(args->trans, bp2, 0, args->geo->blksize - 1); @@ -1274,7 +1274,7 @@ xfs_attr3_leaf_create( ichdr.magic = XFS_ATTR3_LEAF_MAGIC; - hdr3->blkno = cpu_to_be64(bp->b_bn); + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); hdr3->owner = cpu_to_be64(dp->i_ino); uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c index 8429395ad5f1..83b95be9ded8 100644 --- a/fs/xfs/libxfs/xfs_attr_remote.c +++ b/fs/xfs/libxfs/xfs_attr_remote.c @@ -130,7 +130,7 @@ __xfs_attr3_rmt_read_verify( return 0; ptr = bp->b_addr; - bno = bp->b_bn; + bno = xfs_buf_daddr(bp); len = BBTOB(bp->b_length); ASSERT(len >= blksize); @@ -195,7 +195,7 @@ xfs_attr3_rmt_write_verify( return; ptr = bp->b_addr; - bno = bp->b_bn; + bno = xfs_buf_daddr(bp); len = BBTOB(bp->b_length); ASSERT(len >= blksize); @@ -284,7 +284,7 @@ xfs_attr_rmtval_copyout( uint8_t **dst) { char *src = bp->b_addr; - xfs_daddr_t bno = bp->b_bn; + xfs_daddr_t bno = xfs_buf_daddr(bp); int len = BBTOB(bp->b_length); int blksize = mp->m_attr_geo->blksize; @@ -332,7 +332,7 @@ xfs_attr_rmtval_copyin( uint8_t **src) { char *dst = bp->b_addr; - xfs_daddr_t bno = bp->b_bn; + xfs_daddr_t bno = xfs_buf_daddr(bp); int len = BBTOB(bp->b_length); int blksize = mp->m_attr_geo->blksize; diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index d0bfa9a1f549..b48230f1a361 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -739,7 +739,7 @@ xfs_bmap_extents_to_btree( */ abp->b_ops = &xfs_bmbt_buf_ops; ablock = XFS_BUF_TO_BLOCK(abp); - xfs_btree_init_block_int(mp, ablock, abp->b_bn, + xfs_btree_init_block_int(mp, ablock, xfs_buf_daddr(abp), XFS_BTNUM_BMAP, 0, 0, ip->i_ino, XFS_BTREE_LONG_PTRS); diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index dc704c2b22cb..c95b86d89c04 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -70,7 +70,7 @@ __xfs_btree_check_lblock( if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; if (block->bb_u.l.bb_blkno != - cpu_to_be64(bp ? bp->b_bn : XFS_BUF_DADDR_NULL)) + cpu_to_be64(bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL)) return __this_address; if (block->bb_u.l.bb_pad != cpu_to_be32(0)) return __this_address; @@ -135,7 +135,7 @@ __xfs_btree_check_sblock( if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; if (block->bb_u.s.bb_blkno != - cpu_to_be64(bp ? bp->b_bn : XFS_BUF_DADDR_NULL)) + cpu_to_be64(bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL)) return __this_address; } @@ -1131,7 +1131,7 @@ xfs_btree_init_block( __u16 numrecs, __u64 owner) { - xfs_btree_init_block_int(mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn, + xfs_btree_init_block_int(mp, XFS_BUF_TO_BLOCK(bp), xfs_buf_daddr(bp), btnum, level, numrecs, owner, 0); } @@ -1155,9 +1155,9 @@ xfs_btree_init_block_cur( else owner = cur->bc_ag.pag->pag_agno; - xfs_btree_init_block_int(cur->bc_mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn, - cur->bc_btnum, level, numrecs, - owner, cur->bc_flags); + xfs_btree_init_block_int(cur->bc_mp, XFS_BUF_TO_BLOCK(bp), + xfs_buf_daddr(bp), cur->bc_btnum, level, + numrecs, owner, cur->bc_flags); } /* @@ -2923,10 +2923,11 @@ xfs_btree_new_iroot( */ memcpy(cblock, block, xfs_btree_block_len(cur)); if (cur->bc_flags & XFS_BTREE_CRC_BLOCKS) { + __be64 bno = cpu_to_be64(xfs_buf_daddr(cbp)); if (cur->bc_flags & XFS_BTREE_LONG_PTRS) - cblock->bb_u.l.bb_blkno = cpu_to_be64(cbp->b_bn); + cblock->bb_u.l.bb_blkno = bno; else - cblock->bb_u.s.bb_blkno = cpu_to_be64(cbp->b_bn); + cblock->bb_u.s.bb_blkno = bno; } be16_add_cpu(&block->bb_level, 1); @@ -3225,7 +3226,7 @@ xfs_btree_insrec( /* Get pointers to the btree buffer and block. */ block = xfs_btree_get_block(cur, level, &bp); - old_bn = bp ? bp->b_bn : XFS_BUF_DADDR_NULL; + old_bn = bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL; numrecs = xfs_btree_get_numrecs(block); #ifdef DEBUG @@ -3341,7 +3342,7 @@ xfs_btree_insrec( * some records into the new tree block), so use the regular key * update mechanism. */ - if (bp && bp->b_bn != old_bn) { + if (bp && xfs_buf_daddr(bp) != old_bn) { xfs_btree_get_keys(cur, block, lkey); } else if (xfs_btree_needs_key_update(cur, optr)) { error = xfs_btree_update_keys(cur, level); @@ -4422,7 +4423,7 @@ xfs_btree_lblock_v5hdr_verify( return __this_address; if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (block->bb_u.l.bb_blkno != cpu_to_be64(bp->b_bn)) + if (block->bb_u.l.bb_blkno != cpu_to_be64(xfs_buf_daddr(bp))) return __this_address; if (owner != XFS_RMAP_OWN_UNKNOWN && be64_to_cpu(block->bb_u.l.bb_owner) != owner) @@ -4472,7 +4473,7 @@ xfs_btree_sblock_v5hdr_verify( return __this_address; if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn)) + if (block->bb_u.s.bb_blkno != cpu_to_be64(xfs_buf_daddr(bp))) return __this_address; if (pag && be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno) return __this_address; diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index 99f81f6bb306..c062e2c85178 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -194,7 +194,7 @@ xfs_da3_blkinfo_verify( if (xfs_has_crc(mp)) { if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) return __this_address; @@ -447,7 +447,7 @@ xfs_da3_node_create( memset(hdr3, 0, sizeof(struct xfs_da3_node_hdr)); ichdr.magic = XFS_DA3_NODE_MAGIC; - hdr3->info.blkno = cpu_to_be64(bp->b_bn); + hdr3->info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); hdr3->info.owner = cpu_to_be64(args->dp->i_ino); uuid_copy(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid); } else { @@ -711,7 +711,7 @@ xfs_da3_root_split( oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { struct xfs_da3_intnode *node3 = (struct xfs_da3_intnode *)node; - node3->hdr.info.blkno = cpu_to_be64(bp->b_bn); + node3->hdr.info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); } xfs_trans_log_buf(tp, bp, 0, size - 1); @@ -1219,7 +1219,7 @@ xfs_da3_root_join( xfs_trans_buf_copy_type(root_blk->bp, bp); if (oldroothdr.magic == XFS_DA3_NODE_MAGIC) { struct xfs_da3_blkinfo *da3 = root_blk->bp->b_addr; - da3->blkno = cpu_to_be64(root_blk->bp->b_bn); + da3->blkno = cpu_to_be64(xfs_buf_daddr(root_blk->bp)); } xfs_trans_log_buf(args->trans, root_blk->bp, 0, args->geo->blksize - 1); diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c index 41e406067f91..df0869bba275 100644 --- a/fs/xfs/libxfs/xfs_dir2_block.c +++ b/fs/xfs/libxfs/xfs_dir2_block.c @@ -56,7 +56,7 @@ xfs_dir3_block_verify( if (xfs_has_crc(mp)) { if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) return __this_address; @@ -174,7 +174,7 @@ xfs_dir3_block_init( if (xfs_has_crc(mp)) { memset(hdr3, 0, sizeof(*hdr3)); hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); - hdr3->blkno = cpu_to_be64(bp->b_bn); + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); hdr3->owner = cpu_to_be64(dp->i_ino); uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); return; diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c index c90180f2ba5c..dbcf58979a59 100644 --- a/fs/xfs/libxfs/xfs_dir2_data.c +++ b/fs/xfs/libxfs/xfs_dir2_data.c @@ -300,7 +300,7 @@ xfs_dir3_data_verify( if (xfs_has_crc(mp)) { if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) return __this_address; @@ -722,7 +722,7 @@ xfs_dir3_data_init( memset(hdr3, 0, sizeof(*hdr3)); hdr3->magic = cpu_to_be32(XFS_DIR3_DATA_MAGIC); - hdr3->blkno = cpu_to_be64(bp->b_bn); + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); hdr3->owner = cpu_to_be64(dp->i_ino); uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c index d03db9cde271..d9b66306a9a7 100644 --- a/fs/xfs/libxfs/xfs_dir2_leaf.c +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c @@ -108,7 +108,7 @@ xfs_dir3_leaf1_check( if (leafhdr.magic == XFS_DIR3_LEAF1_MAGIC) { struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; - if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) + if (be64_to_cpu(leaf3->info.blkno) != xfs_buf_daddr(bp)) return __this_address; } else if (leafhdr.magic != XFS_DIR2_LEAF1_MAGIC) return __this_address; @@ -316,7 +316,7 @@ xfs_dir3_leaf_init( leaf3->info.hdr.magic = (type == XFS_DIR2_LEAF1_MAGIC) ? cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) : cpu_to_be16(XFS_DIR3_LEAFN_MAGIC); - leaf3->info.blkno = cpu_to_be64(bp->b_bn); + leaf3->info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); leaf3->info.owner = cpu_to_be64(owner); uuid_copy(&leaf3->info.uuid, &mp->m_sb.sb_meta_uuid); } else { diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c index fbd2de8b3cf2..7a03aeb9f4c9 100644 --- a/fs/xfs/libxfs/xfs_dir2_node.c +++ b/fs/xfs/libxfs/xfs_dir2_node.c @@ -68,7 +68,7 @@ xfs_dir3_leafn_check( if (leafhdr.magic == XFS_DIR3_LEAFN_MAGIC) { struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; - if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) + if (be64_to_cpu(leaf3->info.blkno) != xfs_buf_daddr(bp)) return __this_address; } else if (leafhdr.magic != XFS_DIR2_LEAFN_MAGIC) return __this_address; @@ -110,7 +110,7 @@ xfs_dir3_free_verify( if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) return __this_address; @@ -346,7 +346,7 @@ xfs_dir3_free_get_buf( hdr.magic = XFS_DIR3_FREE_MAGIC; - hdr3->hdr.blkno = cpu_to_be64(bp->b_bn); + hdr3->hdr.blkno = cpu_to_be64(xfs_buf_daddr(bp)); hdr3->hdr.owner = cpu_to_be64(dp->i_ino); uuid_copy(&hdr3->hdr.uuid, &mp->m_sb.sb_meta_uuid); } else diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index 83ba63b4ace4..3932b4ebf903 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -71,7 +71,7 @@ xfs_inode_buf_verify( #ifdef DEBUG xfs_alert(mp, "bad inode magic/vsn daddr %lld #%d (magic=%x)", - (unsigned long long)bp->b_bn, i, + (unsigned long long)xfs_buf_daddr(bp), i, be16_to_cpu(dip->di_magic)); #endif xfs_buf_verifier_error(bp, -EFSCORRUPTED, diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index b1c5ec1bd200..e58349be78bd 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -747,7 +747,7 @@ xfs_sb_read_verify( if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { /* Only fail bad secondaries on a known V5 filesystem */ - if (bp->b_maps[0].bm_bn == XFS_SB_DADDR || + if (xfs_buf_daddr(bp) == XFS_SB_DADDR || xfs_has_crc(mp)) { error = -EFSBADCRC; goto out_error; diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c index 98b2b6804657..f0b38f4aba80 100644 --- a/fs/xfs/libxfs/xfs_symlink_remote.c +++ b/fs/xfs/libxfs/xfs_symlink_remote.c @@ -51,7 +51,7 @@ xfs_symlink_hdr_set( dsl->sl_bytes = cpu_to_be32(size); uuid_copy(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid); dsl->sl_owner = cpu_to_be64(ino); - dsl->sl_blkno = cpu_to_be64(bp->b_bn); + dsl->sl_blkno = cpu_to_be64(xfs_buf_daddr(bp)); bp->b_ops = &xfs_symlink_buf_ops; return sizeof(struct xfs_dsymlink_hdr); @@ -95,7 +95,7 @@ xfs_symlink_verify( return __this_address; if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid)) return __this_address; - if (bp->b_bn != be64_to_cpu(dsl->sl_blkno)) + if (xfs_buf_daddr(bp) != be64_to_cpu(dsl->sl_blkno)) return __this_address; if (be32_to_cpu(dsl->sl_offset) + be32_to_cpu(dsl->sl_bytes) >= XFS_SYMLINK_MAXLEN) diff --git a/fs/xfs/scrub/bitmap.c b/fs/xfs/scrub/bitmap.c index 813b5f219113..d6d24c866bc4 100644 --- a/fs/xfs/scrub/bitmap.c +++ b/fs/xfs/scrub/bitmap.c @@ -260,7 +260,7 @@ xbitmap_set_btcur_path( xfs_btree_get_block(cur, i, &bp); if (!bp) continue; - fsb = XFS_DADDR_TO_FSB(cur->bc_mp, bp->b_bn); + fsb = XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp)); error = xbitmap_set(bitmap, fsb, 1); if (error) return error; @@ -284,7 +284,7 @@ xbitmap_collect_btblock( if (!bp) return 0; - fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, bp->b_bn); + fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp)); return xbitmap_set(bitmap, fsbno, 1); } diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index 74a442bc7e14..38f8852d9837 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -186,7 +186,7 @@ xchk_block_set_preen( struct xfs_buf *bp) { sc->sm->sm_flags |= XFS_SCRUB_OFLAG_PREEN; - trace_xchk_block_preen(sc, bp->b_bn, __return_address); + trace_xchk_block_preen(sc, xfs_buf_daddr(bp), __return_address); } /* @@ -219,7 +219,7 @@ xchk_block_set_corrupt( struct xfs_buf *bp) { sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; - trace_xchk_block_error(sc, bp->b_bn, __return_address); + trace_xchk_block_error(sc, xfs_buf_daddr(bp), __return_address); } /* Record a corruption while cross-referencing. */ @@ -229,7 +229,7 @@ xchk_block_xref_set_corrupt( struct xfs_buf *bp) { sc->sm->sm_flags |= XFS_SCRUB_OFLAG_XCORRUPT; - trace_xchk_block_error(sc, bp->b_bn, __return_address); + trace_xchk_block_error(sc, xfs_buf_daddr(bp), __return_address); } /* @@ -787,7 +787,7 @@ xchk_buffer_recheck( if (!fa) return; sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; - trace_xchk_block_error(sc, bp->b_bn, fa); + trace_xchk_block_error(sc, xfs_buf_daddr(bp), fa); } /* diff --git a/fs/xfs/scrub/trace.c b/fs/xfs/scrub/trace.c index 03882a605a3c..c0ef53fe6611 100644 --- a/fs/xfs/scrub/trace.c +++ b/fs/xfs/scrub/trace.c @@ -22,11 +22,11 @@ xchk_btree_cur_fsbno( int level) { if (level < cur->bc_nlevels && cur->bc_bufs[level]) - return XFS_DADDR_TO_FSB(cur->bc_mp, cur->bc_bufs[level]->b_bn); - else if (level == cur->bc_nlevels - 1 && - cur->bc_flags & XFS_BTREE_LONG_PTRS) + return XFS_DADDR_TO_FSB(cur->bc_mp, + xfs_buf_daddr(cur->bc_bufs[level])); + if (level == cur->bc_nlevels - 1 && cur->bc_flags & XFS_BTREE_LONG_PTRS) return XFS_INO_TO_FSB(cur->bc_mp, cur->bc_ino.ip->i_ino); - else if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS)) + if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS)) return XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_ag.pag->pag_agno, 0); return NULLFSBLOCK; } diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c index d8fdde206867..2b5da6218977 100644 --- a/fs/xfs/xfs_attr_inactive.c +++ b/fs/xfs/xfs_attr_inactive.c @@ -151,7 +151,7 @@ xfs_attr3_node_inactive( } xfs_da3_node_hdr_from_disk(dp->i_mount, &ichdr, bp->b_addr); - parent_blkno = bp->b_bn; + parent_blkno = xfs_buf_daddr(bp); if (!ichdr.count) { xfs_trans_brelse(*trans, bp); return 0; @@ -271,7 +271,7 @@ xfs_attr3_root_inactive( error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK); if (error) return error; - blkno = bp->b_bn; + blkno = xfs_buf_daddr(bp); /* * Invalidate the tree, even if the "tree" is only a single leaf block. diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index d81b0c5e6e9c..b1ab100c09e1 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -581,7 +581,7 @@ xfs_buf_item_push( if (bp->b_flags & XBF_WRITE_FAIL) { xfs_buf_alert_ratelimited(bp, "XFS: Failing async write", "Failing async write on buffer block 0x%llx. Retrying async write.", - (long long)bp->b_bn); + (long long)xfs_buf_daddr(bp)); } if (!xfs_buf_delwri_queue(bp, buffer_list)) diff --git a/fs/xfs/xfs_buf_item_recover.c b/fs/xfs/xfs_buf_item_recover.c index a14f7039d346..a476c7ef5d53 100644 --- a/fs/xfs/xfs_buf_item_recover.c +++ b/fs/xfs/xfs_buf_item_recover.c @@ -497,7 +497,7 @@ xlog_recover_do_reg_buffer( if (fa) { xfs_alert(mp, "dquot corrupt at %pS trying to replay into block 0x%llx", - fa, bp->b_bn); + fa, xfs_buf_daddr(bp)); goto next; } } diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c index ce3bc1b291a1..81c445e9489b 100644 --- a/fs/xfs/xfs_error.c +++ b/fs/xfs/xfs_error.c @@ -371,7 +371,7 @@ xfs_buf_corruption_error( xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, "Metadata corruption detected at %pS, %s block 0x%llx", - fa, bp->b_ops->name, bp->b_bn); + fa, bp->b_ops->name, xfs_buf_daddr(bp)); xfs_alert(mp, "Unmount and run xfs_repair"); @@ -402,7 +402,7 @@ xfs_buf_verifier_error( xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, "Metadata %s detected at %pS, %s block 0x%llx %s", bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", - fa, bp->b_ops->name, bp->b_bn, name); + fa, bp->b_ops->name, xfs_buf_daddr(bp), name); xfs_alert(mp, "Unmount and run xfs_repair"); diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 5bb974c468e8..2fc51985a59e 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -386,10 +386,7 @@ DECLARE_EVENT_CLASS(xfs_buf_class, ), TP_fast_assign( __entry->dev = bp->b_target->bt_dev; - if (bp->b_bn == XFS_BUF_DADDR_NULL) - __entry->bno = bp->b_maps[0].bm_bn; - else - __entry->bno = bp->b_bn; + __entry->bno = xfs_buf_daddr(bp); __entry->nblks = bp->b_length; __entry->hold = atomic_read(&bp->b_hold); __entry->pincount = atomic_read(&bp->b_pin_count); @@ -457,7 +454,7 @@ DECLARE_EVENT_CLASS(xfs_buf_flags_class, ), TP_fast_assign( __entry->dev = bp->b_target->bt_dev; - __entry->bno = bp->b_bn; + __entry->bno = xfs_buf_daddr(bp); __entry->buffer_length = BBTOB(bp->b_length); __entry->flags = flags; __entry->hold = atomic_read(&bp->b_hold); @@ -501,7 +498,7 @@ TRACE_EVENT(xfs_buf_ioerror, ), TP_fast_assign( __entry->dev = bp->b_target->bt_dev; - __entry->bno = bp->b_bn; + __entry->bno = xfs_buf_daddr(bp); __entry->buffer_length = BBTOB(bp->b_length); __entry->hold = atomic_read(&bp->b_hold); __entry->pincount = atomic_read(&bp->b_pin_count); @@ -544,7 +541,7 @@ DECLARE_EVENT_CLASS(xfs_buf_item_class, __entry->bli_flags = bip->bli_flags; __entry->bli_recur = bip->bli_recur; __entry->bli_refcount = atomic_read(&bip->bli_refcount); - __entry->buf_bno = bip->bli_buf->b_bn; + __entry->buf_bno = xfs_buf_daddr(bip->bli_buf); __entry->buf_len = BBTOB(bip->bli_buf->b_length); __entry->buf_flags = bip->bli_buf->b_flags; __entry->buf_hold = atomic_read(&bip->bli_buf->b_hold); @@ -2435,7 +2432,7 @@ DECLARE_EVENT_CLASS(xfs_btree_cur_class, __entry->level = level; __entry->nlevels = cur->bc_nlevels; __entry->ptr = cur->bc_ptrs[level]; - __entry->daddr = bp ? bp->b_bn : -1; + __entry->daddr = bp ? xfs_buf_daddr(bp) : -1; ), TP_printk("dev %d:%d btree %s level %d/%d ptr %d daddr 0x%llx", MAJOR(__entry->dev), MINOR(__entry->dev), -- 2.31.1 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() 2021-08-19 0:00 ` [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() Dave Chinner @ 2021-08-19 2:03 ` Darrick J. Wong 0 siblings, 0 replies; 12+ messages in thread From: Darrick J. Wong @ 2021-08-19 2:03 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Thu, Aug 19, 2021 at 10:00:54AM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@redhat.com> > > Stop directly referencing b_bn in code outside the buffer cache, as > b_bn is supposed to be used only as an internal cache index. > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > Reviewed-by: Christoph Hellwig <hch@lst.de> Pretty straightforward conversion. Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D > --- > fs/xfs/libxfs/xfs_ag.c | 1 - > fs/xfs/libxfs/xfs_attr_leaf.c | 4 ++-- > fs/xfs/libxfs/xfs_attr_remote.c | 8 ++++---- > fs/xfs/libxfs/xfs_bmap.c | 2 +- > fs/xfs/libxfs/xfs_btree.c | 25 +++++++++++++------------ > fs/xfs/libxfs/xfs_da_btree.c | 8 ++++---- > fs/xfs/libxfs/xfs_dir2_block.c | 4 ++-- > fs/xfs/libxfs/xfs_dir2_data.c | 4 ++-- > fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++-- > fs/xfs/libxfs/xfs_dir2_node.c | 6 +++--- > fs/xfs/libxfs/xfs_inode_buf.c | 2 +- > fs/xfs/libxfs/xfs_sb.c | 2 +- > fs/xfs/libxfs/xfs_symlink_remote.c | 4 ++-- > fs/xfs/scrub/bitmap.c | 4 ++-- > fs/xfs/scrub/common.c | 8 ++++---- > fs/xfs/scrub/trace.c | 8 ++++---- > fs/xfs/xfs_attr_inactive.c | 4 ++-- > fs/xfs/xfs_buf_item.c | 2 +- > fs/xfs/xfs_buf_item_recover.c | 2 +- > fs/xfs/xfs_error.c | 4 ++-- > fs/xfs/xfs_trace.h | 13 +++++-------- > 21 files changed, 58 insertions(+), 61 deletions(-) > > diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c > index 92033c4672a4..005abfd9fd34 100644 > --- a/fs/xfs/libxfs/xfs_ag.c > +++ b/fs/xfs/libxfs/xfs_ag.c > @@ -313,7 +313,6 @@ xfs_get_aghdr_buf( > if (error) > return error; > > - bp->b_bn = blkno; > bp->b_maps[0].bm_bn = blkno; > bp->b_ops = ops; > > diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c > index 7975b36fe6a3..e1d11e314228 100644 > --- a/fs/xfs/libxfs/xfs_attr_leaf.c > +++ b/fs/xfs/libxfs/xfs_attr_leaf.c > @@ -1206,7 +1206,7 @@ xfs_attr3_leaf_to_node( > memcpy(bp2->b_addr, bp1->b_addr, args->geo->blksize); > if (xfs_has_crc(mp)) { > struct xfs_da3_blkinfo *hdr3 = bp2->b_addr; > - hdr3->blkno = cpu_to_be64(bp2->b_bn); > + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp2)); > } > xfs_trans_log_buf(args->trans, bp2, 0, args->geo->blksize - 1); > > @@ -1274,7 +1274,7 @@ xfs_attr3_leaf_create( > > ichdr.magic = XFS_ATTR3_LEAF_MAGIC; > > - hdr3->blkno = cpu_to_be64(bp->b_bn); > + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); > hdr3->owner = cpu_to_be64(dp->i_ino); > uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); > > diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c > index 8429395ad5f1..83b95be9ded8 100644 > --- a/fs/xfs/libxfs/xfs_attr_remote.c > +++ b/fs/xfs/libxfs/xfs_attr_remote.c > @@ -130,7 +130,7 @@ __xfs_attr3_rmt_read_verify( > return 0; > > ptr = bp->b_addr; > - bno = bp->b_bn; > + bno = xfs_buf_daddr(bp); > len = BBTOB(bp->b_length); > ASSERT(len >= blksize); > > @@ -195,7 +195,7 @@ xfs_attr3_rmt_write_verify( > return; > > ptr = bp->b_addr; > - bno = bp->b_bn; > + bno = xfs_buf_daddr(bp); > len = BBTOB(bp->b_length); > ASSERT(len >= blksize); > > @@ -284,7 +284,7 @@ xfs_attr_rmtval_copyout( > uint8_t **dst) > { > char *src = bp->b_addr; > - xfs_daddr_t bno = bp->b_bn; > + xfs_daddr_t bno = xfs_buf_daddr(bp); > int len = BBTOB(bp->b_length); > int blksize = mp->m_attr_geo->blksize; > > @@ -332,7 +332,7 @@ xfs_attr_rmtval_copyin( > uint8_t **src) > { > char *dst = bp->b_addr; > - xfs_daddr_t bno = bp->b_bn; > + xfs_daddr_t bno = xfs_buf_daddr(bp); > int len = BBTOB(bp->b_length); > int blksize = mp->m_attr_geo->blksize; > > diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c > index d0bfa9a1f549..b48230f1a361 100644 > --- a/fs/xfs/libxfs/xfs_bmap.c > +++ b/fs/xfs/libxfs/xfs_bmap.c > @@ -739,7 +739,7 @@ xfs_bmap_extents_to_btree( > */ > abp->b_ops = &xfs_bmbt_buf_ops; > ablock = XFS_BUF_TO_BLOCK(abp); > - xfs_btree_init_block_int(mp, ablock, abp->b_bn, > + xfs_btree_init_block_int(mp, ablock, xfs_buf_daddr(abp), > XFS_BTNUM_BMAP, 0, 0, ip->i_ino, > XFS_BTREE_LONG_PTRS); > > diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c > index dc704c2b22cb..c95b86d89c04 100644 > --- a/fs/xfs/libxfs/xfs_btree.c > +++ b/fs/xfs/libxfs/xfs_btree.c > @@ -70,7 +70,7 @@ __xfs_btree_check_lblock( > if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > if (block->bb_u.l.bb_blkno != > - cpu_to_be64(bp ? bp->b_bn : XFS_BUF_DADDR_NULL)) > + cpu_to_be64(bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL)) > return __this_address; > if (block->bb_u.l.bb_pad != cpu_to_be32(0)) > return __this_address; > @@ -135,7 +135,7 @@ __xfs_btree_check_sblock( > if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > if (block->bb_u.s.bb_blkno != > - cpu_to_be64(bp ? bp->b_bn : XFS_BUF_DADDR_NULL)) > + cpu_to_be64(bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL)) > return __this_address; > } > > @@ -1131,7 +1131,7 @@ xfs_btree_init_block( > __u16 numrecs, > __u64 owner) > { > - xfs_btree_init_block_int(mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn, > + xfs_btree_init_block_int(mp, XFS_BUF_TO_BLOCK(bp), xfs_buf_daddr(bp), > btnum, level, numrecs, owner, 0); > } > > @@ -1155,9 +1155,9 @@ xfs_btree_init_block_cur( > else > owner = cur->bc_ag.pag->pag_agno; > > - xfs_btree_init_block_int(cur->bc_mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn, > - cur->bc_btnum, level, numrecs, > - owner, cur->bc_flags); > + xfs_btree_init_block_int(cur->bc_mp, XFS_BUF_TO_BLOCK(bp), > + xfs_buf_daddr(bp), cur->bc_btnum, level, > + numrecs, owner, cur->bc_flags); > } > > /* > @@ -2923,10 +2923,11 @@ xfs_btree_new_iroot( > */ > memcpy(cblock, block, xfs_btree_block_len(cur)); > if (cur->bc_flags & XFS_BTREE_CRC_BLOCKS) { > + __be64 bno = cpu_to_be64(xfs_buf_daddr(cbp)); > if (cur->bc_flags & XFS_BTREE_LONG_PTRS) > - cblock->bb_u.l.bb_blkno = cpu_to_be64(cbp->b_bn); > + cblock->bb_u.l.bb_blkno = bno; > else > - cblock->bb_u.s.bb_blkno = cpu_to_be64(cbp->b_bn); > + cblock->bb_u.s.bb_blkno = bno; > } > > be16_add_cpu(&block->bb_level, 1); > @@ -3225,7 +3226,7 @@ xfs_btree_insrec( > > /* Get pointers to the btree buffer and block. */ > block = xfs_btree_get_block(cur, level, &bp); > - old_bn = bp ? bp->b_bn : XFS_BUF_DADDR_NULL; > + old_bn = bp ? xfs_buf_daddr(bp) : XFS_BUF_DADDR_NULL; > numrecs = xfs_btree_get_numrecs(block); > > #ifdef DEBUG > @@ -3341,7 +3342,7 @@ xfs_btree_insrec( > * some records into the new tree block), so use the regular key > * update mechanism. > */ > - if (bp && bp->b_bn != old_bn) { > + if (bp && xfs_buf_daddr(bp) != old_bn) { > xfs_btree_get_keys(cur, block, lkey); > } else if (xfs_btree_needs_key_update(cur, optr)) { > error = xfs_btree_update_keys(cur, level); > @@ -4422,7 +4423,7 @@ xfs_btree_lblock_v5hdr_verify( > return __this_address; > if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (block->bb_u.l.bb_blkno != cpu_to_be64(bp->b_bn)) > + if (block->bb_u.l.bb_blkno != cpu_to_be64(xfs_buf_daddr(bp))) > return __this_address; > if (owner != XFS_RMAP_OWN_UNKNOWN && > be64_to_cpu(block->bb_u.l.bb_owner) != owner) > @@ -4472,7 +4473,7 @@ xfs_btree_sblock_v5hdr_verify( > return __this_address; > if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn)) > + if (block->bb_u.s.bb_blkno != cpu_to_be64(xfs_buf_daddr(bp))) > return __this_address; > if (pag && be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno) > return __this_address; > diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c > index 99f81f6bb306..c062e2c85178 100644 > --- a/fs/xfs/libxfs/xfs_da_btree.c > +++ b/fs/xfs/libxfs/xfs_da_btree.c > @@ -194,7 +194,7 @@ xfs_da3_blkinfo_verify( > if (xfs_has_crc(mp)) { > if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) > + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) > return __this_address; > if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) > return __this_address; > @@ -447,7 +447,7 @@ xfs_da3_node_create( > > memset(hdr3, 0, sizeof(struct xfs_da3_node_hdr)); > ichdr.magic = XFS_DA3_NODE_MAGIC; > - hdr3->info.blkno = cpu_to_be64(bp->b_bn); > + hdr3->info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); > hdr3->info.owner = cpu_to_be64(args->dp->i_ino); > uuid_copy(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid); > } else { > @@ -711,7 +711,7 @@ xfs_da3_root_split( > oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { > struct xfs_da3_intnode *node3 = (struct xfs_da3_intnode *)node; > > - node3->hdr.info.blkno = cpu_to_be64(bp->b_bn); > + node3->hdr.info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); > } > xfs_trans_log_buf(tp, bp, 0, size - 1); > > @@ -1219,7 +1219,7 @@ xfs_da3_root_join( > xfs_trans_buf_copy_type(root_blk->bp, bp); > if (oldroothdr.magic == XFS_DA3_NODE_MAGIC) { > struct xfs_da3_blkinfo *da3 = root_blk->bp->b_addr; > - da3->blkno = cpu_to_be64(root_blk->bp->b_bn); > + da3->blkno = cpu_to_be64(xfs_buf_daddr(root_blk->bp)); > } > xfs_trans_log_buf(args->trans, root_blk->bp, 0, > args->geo->blksize - 1); > diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c > index 41e406067f91..df0869bba275 100644 > --- a/fs/xfs/libxfs/xfs_dir2_block.c > +++ b/fs/xfs/libxfs/xfs_dir2_block.c > @@ -56,7 +56,7 @@ xfs_dir3_block_verify( > if (xfs_has_crc(mp)) { > if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) > + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) > return __this_address; > if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) > return __this_address; > @@ -174,7 +174,7 @@ xfs_dir3_block_init( > if (xfs_has_crc(mp)) { > memset(hdr3, 0, sizeof(*hdr3)); > hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); > - hdr3->blkno = cpu_to_be64(bp->b_bn); > + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); > hdr3->owner = cpu_to_be64(dp->i_ino); > uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); > return; > diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c > index c90180f2ba5c..dbcf58979a59 100644 > --- a/fs/xfs/libxfs/xfs_dir2_data.c > +++ b/fs/xfs/libxfs/xfs_dir2_data.c > @@ -300,7 +300,7 @@ xfs_dir3_data_verify( > if (xfs_has_crc(mp)) { > if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) > + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) > return __this_address; > if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) > return __this_address; > @@ -722,7 +722,7 @@ xfs_dir3_data_init( > > memset(hdr3, 0, sizeof(*hdr3)); > hdr3->magic = cpu_to_be32(XFS_DIR3_DATA_MAGIC); > - hdr3->blkno = cpu_to_be64(bp->b_bn); > + hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp)); > hdr3->owner = cpu_to_be64(dp->i_ino); > uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); > > diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c > index d03db9cde271..d9b66306a9a7 100644 > --- a/fs/xfs/libxfs/xfs_dir2_leaf.c > +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c > @@ -108,7 +108,7 @@ xfs_dir3_leaf1_check( > > if (leafhdr.magic == XFS_DIR3_LEAF1_MAGIC) { > struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; > - if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) > + if (be64_to_cpu(leaf3->info.blkno) != xfs_buf_daddr(bp)) > return __this_address; > } else if (leafhdr.magic != XFS_DIR2_LEAF1_MAGIC) > return __this_address; > @@ -316,7 +316,7 @@ xfs_dir3_leaf_init( > leaf3->info.hdr.magic = (type == XFS_DIR2_LEAF1_MAGIC) > ? cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) > : cpu_to_be16(XFS_DIR3_LEAFN_MAGIC); > - leaf3->info.blkno = cpu_to_be64(bp->b_bn); > + leaf3->info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); > leaf3->info.owner = cpu_to_be64(owner); > uuid_copy(&leaf3->info.uuid, &mp->m_sb.sb_meta_uuid); > } else { > diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c > index fbd2de8b3cf2..7a03aeb9f4c9 100644 > --- a/fs/xfs/libxfs/xfs_dir2_node.c > +++ b/fs/xfs/libxfs/xfs_dir2_node.c > @@ -68,7 +68,7 @@ xfs_dir3_leafn_check( > > if (leafhdr.magic == XFS_DIR3_LEAFN_MAGIC) { > struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; > - if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) > + if (be64_to_cpu(leaf3->info.blkno) != xfs_buf_daddr(bp)) > return __this_address; > } else if (leafhdr.magic != XFS_DIR2_LEAFN_MAGIC) > return __this_address; > @@ -110,7 +110,7 @@ xfs_dir3_free_verify( > > if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (be64_to_cpu(hdr3->blkno) != bp->b_bn) > + if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp)) > return __this_address; > if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) > return __this_address; > @@ -346,7 +346,7 @@ xfs_dir3_free_get_buf( > > hdr.magic = XFS_DIR3_FREE_MAGIC; > > - hdr3->hdr.blkno = cpu_to_be64(bp->b_bn); > + hdr3->hdr.blkno = cpu_to_be64(xfs_buf_daddr(bp)); > hdr3->hdr.owner = cpu_to_be64(dp->i_ino); > uuid_copy(&hdr3->hdr.uuid, &mp->m_sb.sb_meta_uuid); > } else > diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c > index 83ba63b4ace4..3932b4ebf903 100644 > --- a/fs/xfs/libxfs/xfs_inode_buf.c > +++ b/fs/xfs/libxfs/xfs_inode_buf.c > @@ -71,7 +71,7 @@ xfs_inode_buf_verify( > #ifdef DEBUG > xfs_alert(mp, > "bad inode magic/vsn daddr %lld #%d (magic=%x)", > - (unsigned long long)bp->b_bn, i, > + (unsigned long long)xfs_buf_daddr(bp), i, > be16_to_cpu(dip->di_magic)); > #endif > xfs_buf_verifier_error(bp, -EFSCORRUPTED, > diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c > index b1c5ec1bd200..e58349be78bd 100644 > --- a/fs/xfs/libxfs/xfs_sb.c > +++ b/fs/xfs/libxfs/xfs_sb.c > @@ -747,7 +747,7 @@ xfs_sb_read_verify( > > if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { > /* Only fail bad secondaries on a known V5 filesystem */ > - if (bp->b_maps[0].bm_bn == XFS_SB_DADDR || > + if (xfs_buf_daddr(bp) == XFS_SB_DADDR || > xfs_has_crc(mp)) { > error = -EFSBADCRC; > goto out_error; > diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c > index 98b2b6804657..f0b38f4aba80 100644 > --- a/fs/xfs/libxfs/xfs_symlink_remote.c > +++ b/fs/xfs/libxfs/xfs_symlink_remote.c > @@ -51,7 +51,7 @@ xfs_symlink_hdr_set( > dsl->sl_bytes = cpu_to_be32(size); > uuid_copy(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid); > dsl->sl_owner = cpu_to_be64(ino); > - dsl->sl_blkno = cpu_to_be64(bp->b_bn); > + dsl->sl_blkno = cpu_to_be64(xfs_buf_daddr(bp)); > bp->b_ops = &xfs_symlink_buf_ops; > > return sizeof(struct xfs_dsymlink_hdr); > @@ -95,7 +95,7 @@ xfs_symlink_verify( > return __this_address; > if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid)) > return __this_address; > - if (bp->b_bn != be64_to_cpu(dsl->sl_blkno)) > + if (xfs_buf_daddr(bp) != be64_to_cpu(dsl->sl_blkno)) > return __this_address; > if (be32_to_cpu(dsl->sl_offset) + > be32_to_cpu(dsl->sl_bytes) >= XFS_SYMLINK_MAXLEN) > diff --git a/fs/xfs/scrub/bitmap.c b/fs/xfs/scrub/bitmap.c > index 813b5f219113..d6d24c866bc4 100644 > --- a/fs/xfs/scrub/bitmap.c > +++ b/fs/xfs/scrub/bitmap.c > @@ -260,7 +260,7 @@ xbitmap_set_btcur_path( > xfs_btree_get_block(cur, i, &bp); > if (!bp) > continue; > - fsb = XFS_DADDR_TO_FSB(cur->bc_mp, bp->b_bn); > + fsb = XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp)); > error = xbitmap_set(bitmap, fsb, 1); > if (error) > return error; > @@ -284,7 +284,7 @@ xbitmap_collect_btblock( > if (!bp) > return 0; > > - fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, bp->b_bn); > + fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp)); > return xbitmap_set(bitmap, fsbno, 1); > } > > diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c > index 74a442bc7e14..38f8852d9837 100644 > --- a/fs/xfs/scrub/common.c > +++ b/fs/xfs/scrub/common.c > @@ -186,7 +186,7 @@ xchk_block_set_preen( > struct xfs_buf *bp) > { > sc->sm->sm_flags |= XFS_SCRUB_OFLAG_PREEN; > - trace_xchk_block_preen(sc, bp->b_bn, __return_address); > + trace_xchk_block_preen(sc, xfs_buf_daddr(bp), __return_address); > } > > /* > @@ -219,7 +219,7 @@ xchk_block_set_corrupt( > struct xfs_buf *bp) > { > sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; > - trace_xchk_block_error(sc, bp->b_bn, __return_address); > + trace_xchk_block_error(sc, xfs_buf_daddr(bp), __return_address); > } > > /* Record a corruption while cross-referencing. */ > @@ -229,7 +229,7 @@ xchk_block_xref_set_corrupt( > struct xfs_buf *bp) > { > sc->sm->sm_flags |= XFS_SCRUB_OFLAG_XCORRUPT; > - trace_xchk_block_error(sc, bp->b_bn, __return_address); > + trace_xchk_block_error(sc, xfs_buf_daddr(bp), __return_address); > } > > /* > @@ -787,7 +787,7 @@ xchk_buffer_recheck( > if (!fa) > return; > sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; > - trace_xchk_block_error(sc, bp->b_bn, fa); > + trace_xchk_block_error(sc, xfs_buf_daddr(bp), fa); > } > > /* > diff --git a/fs/xfs/scrub/trace.c b/fs/xfs/scrub/trace.c > index 03882a605a3c..c0ef53fe6611 100644 > --- a/fs/xfs/scrub/trace.c > +++ b/fs/xfs/scrub/trace.c > @@ -22,11 +22,11 @@ xchk_btree_cur_fsbno( > int level) > { > if (level < cur->bc_nlevels && cur->bc_bufs[level]) > - return XFS_DADDR_TO_FSB(cur->bc_mp, cur->bc_bufs[level]->b_bn); > - else if (level == cur->bc_nlevels - 1 && > - cur->bc_flags & XFS_BTREE_LONG_PTRS) > + return XFS_DADDR_TO_FSB(cur->bc_mp, > + xfs_buf_daddr(cur->bc_bufs[level])); > + if (level == cur->bc_nlevels - 1 && cur->bc_flags & XFS_BTREE_LONG_PTRS) > return XFS_INO_TO_FSB(cur->bc_mp, cur->bc_ino.ip->i_ino); > - else if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS)) > + if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS)) > return XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_ag.pag->pag_agno, 0); > return NULLFSBLOCK; > } > diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c > index d8fdde206867..2b5da6218977 100644 > --- a/fs/xfs/xfs_attr_inactive.c > +++ b/fs/xfs/xfs_attr_inactive.c > @@ -151,7 +151,7 @@ xfs_attr3_node_inactive( > } > > xfs_da3_node_hdr_from_disk(dp->i_mount, &ichdr, bp->b_addr); > - parent_blkno = bp->b_bn; > + parent_blkno = xfs_buf_daddr(bp); > if (!ichdr.count) { > xfs_trans_brelse(*trans, bp); > return 0; > @@ -271,7 +271,7 @@ xfs_attr3_root_inactive( > error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK); > if (error) > return error; > - blkno = bp->b_bn; > + blkno = xfs_buf_daddr(bp); > > /* > * Invalidate the tree, even if the "tree" is only a single leaf block. > diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c > index d81b0c5e6e9c..b1ab100c09e1 100644 > --- a/fs/xfs/xfs_buf_item.c > +++ b/fs/xfs/xfs_buf_item.c > @@ -581,7 +581,7 @@ xfs_buf_item_push( > if (bp->b_flags & XBF_WRITE_FAIL) { > xfs_buf_alert_ratelimited(bp, "XFS: Failing async write", > "Failing async write on buffer block 0x%llx. Retrying async write.", > - (long long)bp->b_bn); > + (long long)xfs_buf_daddr(bp)); > } > > if (!xfs_buf_delwri_queue(bp, buffer_list)) > diff --git a/fs/xfs/xfs_buf_item_recover.c b/fs/xfs/xfs_buf_item_recover.c > index a14f7039d346..a476c7ef5d53 100644 > --- a/fs/xfs/xfs_buf_item_recover.c > +++ b/fs/xfs/xfs_buf_item_recover.c > @@ -497,7 +497,7 @@ xlog_recover_do_reg_buffer( > if (fa) { > xfs_alert(mp, > "dquot corrupt at %pS trying to replay into block 0x%llx", > - fa, bp->b_bn); > + fa, xfs_buf_daddr(bp)); > goto next; > } > } > diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c > index ce3bc1b291a1..81c445e9489b 100644 > --- a/fs/xfs/xfs_error.c > +++ b/fs/xfs/xfs_error.c > @@ -371,7 +371,7 @@ xfs_buf_corruption_error( > > xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, > "Metadata corruption detected at %pS, %s block 0x%llx", > - fa, bp->b_ops->name, bp->b_bn); > + fa, bp->b_ops->name, xfs_buf_daddr(bp)); > > xfs_alert(mp, "Unmount and run xfs_repair"); > > @@ -402,7 +402,7 @@ xfs_buf_verifier_error( > xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR, > "Metadata %s detected at %pS, %s block 0x%llx %s", > bp->b_error == -EFSBADCRC ? "CRC error" : "corruption", > - fa, bp->b_ops->name, bp->b_bn, name); > + fa, bp->b_ops->name, xfs_buf_daddr(bp), name); > > xfs_alert(mp, "Unmount and run xfs_repair"); > > diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h > index 5bb974c468e8..2fc51985a59e 100644 > --- a/fs/xfs/xfs_trace.h > +++ b/fs/xfs/xfs_trace.h > @@ -386,10 +386,7 @@ DECLARE_EVENT_CLASS(xfs_buf_class, > ), > TP_fast_assign( > __entry->dev = bp->b_target->bt_dev; > - if (bp->b_bn == XFS_BUF_DADDR_NULL) > - __entry->bno = bp->b_maps[0].bm_bn; > - else > - __entry->bno = bp->b_bn; > + __entry->bno = xfs_buf_daddr(bp); > __entry->nblks = bp->b_length; > __entry->hold = atomic_read(&bp->b_hold); > __entry->pincount = atomic_read(&bp->b_pin_count); > @@ -457,7 +454,7 @@ DECLARE_EVENT_CLASS(xfs_buf_flags_class, > ), > TP_fast_assign( > __entry->dev = bp->b_target->bt_dev; > - __entry->bno = bp->b_bn; > + __entry->bno = xfs_buf_daddr(bp); > __entry->buffer_length = BBTOB(bp->b_length); > __entry->flags = flags; > __entry->hold = atomic_read(&bp->b_hold); > @@ -501,7 +498,7 @@ TRACE_EVENT(xfs_buf_ioerror, > ), > TP_fast_assign( > __entry->dev = bp->b_target->bt_dev; > - __entry->bno = bp->b_bn; > + __entry->bno = xfs_buf_daddr(bp); > __entry->buffer_length = BBTOB(bp->b_length); > __entry->hold = atomic_read(&bp->b_hold); > __entry->pincount = atomic_read(&bp->b_pin_count); > @@ -544,7 +541,7 @@ DECLARE_EVENT_CLASS(xfs_buf_item_class, > __entry->bli_flags = bip->bli_flags; > __entry->bli_recur = bip->bli_recur; > __entry->bli_refcount = atomic_read(&bip->bli_refcount); > - __entry->buf_bno = bip->bli_buf->b_bn; > + __entry->buf_bno = xfs_buf_daddr(bip->bli_buf); > __entry->buf_len = BBTOB(bip->bli_buf->b_length); > __entry->buf_flags = bip->bli_buf->b_flags; > __entry->buf_hold = atomic_read(&bip->bli_buf->b_hold); > @@ -2435,7 +2432,7 @@ DECLARE_EVENT_CLASS(xfs_btree_cur_class, > __entry->level = level; > __entry->nlevels = cur->bc_nlevels; > __entry->ptr = cur->bc_ptrs[level]; > - __entry->daddr = bp ? bp->b_bn : -1; > + __entry->daddr = bp ? xfs_buf_daddr(bp) : -1; > ), > TP_printk("dev %d:%d btree %s level %d/%d ptr %d daddr 0x%llx", > MAJOR(__entry->dev), MINOR(__entry->dev), > -- > 2.31.1 > ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-19 0:00 [PATCH 0/3 v2] xfs: clean up buffer cache disk addressing Dave Chinner 2021-08-19 0:00 ` [PATCH 1/3] xfs: introduce xfs_buf_daddr() Dave Chinner 2021-08-19 0:00 ` [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() Dave Chinner @ 2021-08-19 0:00 ` Dave Chinner 2021-08-19 1:59 ` Darrick J. Wong 2 siblings, 1 reply; 12+ messages in thread From: Dave Chinner @ 2021-08-19 0:00 UTC (permalink / raw) To: linux-xfs From: Dave Chinner <dchinner@redhat.com> To stop external users from using b_bn as the disk address of the buffer, rename it to b_rhash_key to indicate that it is the buffer cache index, not the block number of the buffer. Code that needs the disk address should use xfs_buf_daddr() to obtain it. Do the rename and clean up any of the remaining internal b_bn users. Also clean up any remaining b_bn cruft that is now unused. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- fs/xfs/xfs_buf.c | 19 +++++++++++-------- fs/xfs/xfs_buf.h | 18 +----------------- 2 files changed, 12 insertions(+), 25 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index c1bb6e41595b..047bd6e3f389 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -251,7 +251,7 @@ _xfs_buf_alloc( return error; } - bp->b_bn = map[0].bm_bn; + bp->b_rhash_key = map[0].bm_bn; bp->b_length = 0; for (i = 0; i < nmaps; i++) { bp->b_maps[i].bm_bn = map[i].bm_bn; @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( */ BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); - if (bp->b_bn != map->bm_bn) + if (bp->b_rhash_key != map->bm_bn) return 1; if (unlikely(bp->b_length != map->bm_len)) { @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { .min_size = 32, /* empty AGs have minimal footprint */ .nelem_hint = 16, .key_len = sizeof(xfs_daddr_t), - .key_offset = offsetof(struct xfs_buf, b_bn), + .key_offset = offsetof(struct xfs_buf, b_rhash_key), .head_offset = offsetof(struct xfs_buf, b_rhash_head), .automatic_shrinking = true, .obj_cmpfn = _xfs_buf_obj_cmp, @@ -853,7 +853,9 @@ xfs_buf_readahead_map( /* * Read an uncached buffer from disk. Allocates and returns a locked - * buffer containing the disk contents or nothing. + * buffer containing the disk contents or nothing. Uncached buffers always have + * a cache index of XFS_BUF_DADDR_NULL so we can easily determine if the buffer + * is cached or uncached during fault diagnosis. */ int xfs_buf_read_uncached( @@ -875,7 +877,7 @@ xfs_buf_read_uncached( /* set up the buffer for a read IO */ ASSERT(bp->b_map_count == 1); - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ + bp->b_rhash_key = XFS_BUF_DADDR_NULL; bp->b_maps[0].bm_bn = daddr; bp->b_flags |= XBF_READ; bp->b_ops = ops; @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( SHUTDOWN_CORRUPT_INCORE); return; } - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { + } else if (bp->b_rhash_key != XFS_BUF_DADDR_NULL) { struct xfs_mount *mp = bp->b_mount; /* @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( if (xfs_has_crc(mp)) { xfs_warn(mp, "%s: no buf ops on daddr 0x%llx len %d", - __func__, bp->b_bn, bp->b_length); + __func__, xfs_buf_daddr(bp), + bp->b_length); xfs_hex_dump(bp->b_addr, XFS_CORRUPTION_DUMP_LEN); dump_stack(); @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( xfs_buf_alert_ratelimited(bp, "XFS: Corruption Alert", "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", - (long long)bp->b_bn); + (long long)xfs_buf_daddr(bp)); } xfs_buf_rele(bp); } diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 6db2fba44b46..6b0200b8007d 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -134,11 +134,7 @@ struct xfs_buf { */ struct rhash_head b_rhash_head; /* pag buffer hash node */ - /* - * b_bn is the cache index. Do not use directly, use b_maps[0].bm_bn - * for the buffer disk address instead. - */ - xfs_daddr_t b_bn; + xfs_daddr_t b_rhash_key; /* buffer cache index */ int b_length; /* size of buffer in BBs */ atomic_t b_hold; /* reference count */ atomic_t b_lru_ref; /* lru reclaim ref count */ @@ -301,18 +297,6 @@ extern int xfs_buf_delwri_pushbuf(struct xfs_buf *, struct list_head *); extern int xfs_buf_init(void); extern void xfs_buf_terminate(void); -/* - * These macros use the IO block map rather than b_bn. b_bn is now really - * just for the buffer cache index for cached buffers. As IO does not use b_bn - * anymore, uncached buffers do not use b_bn at all and hence must modify the IO - * map directly. Uncached buffers are not allowed to be discontiguous, so this - * is safe to do. - * - * In future, uncached buffers will pass the block number directly to the io - * request function and hence these macros will go away at that point. - */ -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) - static inline xfs_daddr_t xfs_buf_daddr(struct xfs_buf *bp) { return bp->b_maps[0].bm_bn; -- 2.31.1 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-19 0:00 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner @ 2021-08-19 1:59 ` Darrick J. Wong 0 siblings, 0 replies; 12+ messages in thread From: Darrick J. Wong @ 2021-08-19 1:59 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Thu, Aug 19, 2021 at 10:00:55AM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@redhat.com> > > To stop external users from using b_bn as the disk address of the > buffer, rename it to b_rhash_key to indicate that it is the buffer > cache index, not the block number of the buffer. Code that needs the > disk address should use xfs_buf_daddr() to obtain it. > > Do the rename and clean up any of the remaining internal b_bn users. > Also clean up any remaining b_bn cruft that is now unused. > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > Reviewed-by: Christoph Hellwig <hch@lst.de> Haaaa my brain didn't fall out! Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D > --- > fs/xfs/xfs_buf.c | 19 +++++++++++-------- > fs/xfs/xfs_buf.h | 18 +----------------- > 2 files changed, 12 insertions(+), 25 deletions(-) > > diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c > index c1bb6e41595b..047bd6e3f389 100644 > --- a/fs/xfs/xfs_buf.c > +++ b/fs/xfs/xfs_buf.c > @@ -251,7 +251,7 @@ _xfs_buf_alloc( > return error; > } > > - bp->b_bn = map[0].bm_bn; > + bp->b_rhash_key = map[0].bm_bn; > bp->b_length = 0; > for (i = 0; i < nmaps; i++) { > bp->b_maps[i].bm_bn = map[i].bm_bn; > @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( > */ > BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); > > - if (bp->b_bn != map->bm_bn) > + if (bp->b_rhash_key != map->bm_bn) > return 1; > > if (unlikely(bp->b_length != map->bm_len)) { > @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { > .min_size = 32, /* empty AGs have minimal footprint */ > .nelem_hint = 16, > .key_len = sizeof(xfs_daddr_t), > - .key_offset = offsetof(struct xfs_buf, b_bn), > + .key_offset = offsetof(struct xfs_buf, b_rhash_key), > .head_offset = offsetof(struct xfs_buf, b_rhash_head), > .automatic_shrinking = true, > .obj_cmpfn = _xfs_buf_obj_cmp, > @@ -853,7 +853,9 @@ xfs_buf_readahead_map( > > /* > * Read an uncached buffer from disk. Allocates and returns a locked > - * buffer containing the disk contents or nothing. > + * buffer containing the disk contents or nothing. Uncached buffers always have > + * a cache index of XFS_BUF_DADDR_NULL so we can easily determine if the buffer > + * is cached or uncached during fault diagnosis. > */ > int > xfs_buf_read_uncached( > @@ -875,7 +877,7 @@ xfs_buf_read_uncached( > > /* set up the buffer for a read IO */ > ASSERT(bp->b_map_count == 1); > - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ > + bp->b_rhash_key = XFS_BUF_DADDR_NULL; > bp->b_maps[0].bm_bn = daddr; > bp->b_flags |= XBF_READ; > bp->b_ops = ops; > @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( > SHUTDOWN_CORRUPT_INCORE); > return; > } > - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { > + } else if (bp->b_rhash_key != XFS_BUF_DADDR_NULL) { > struct xfs_mount *mp = bp->b_mount; > > /* > @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( > if (xfs_has_crc(mp)) { > xfs_warn(mp, > "%s: no buf ops on daddr 0x%llx len %d", > - __func__, bp->b_bn, bp->b_length); > + __func__, xfs_buf_daddr(bp), > + bp->b_length); > xfs_hex_dump(bp->b_addr, > XFS_CORRUPTION_DUMP_LEN); > dump_stack(); > @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( > xfs_buf_alert_ratelimited(bp, > "XFS: Corruption Alert", > "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", > - (long long)bp->b_bn); > + (long long)xfs_buf_daddr(bp)); > } > xfs_buf_rele(bp); > } > diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h > index 6db2fba44b46..6b0200b8007d 100644 > --- a/fs/xfs/xfs_buf.h > +++ b/fs/xfs/xfs_buf.h > @@ -134,11 +134,7 @@ struct xfs_buf { > */ > struct rhash_head b_rhash_head; /* pag buffer hash node */ > > - /* > - * b_bn is the cache index. Do not use directly, use b_maps[0].bm_bn > - * for the buffer disk address instead. > - */ > - xfs_daddr_t b_bn; > + xfs_daddr_t b_rhash_key; /* buffer cache index */ > int b_length; /* size of buffer in BBs */ > atomic_t b_hold; /* reference count */ > atomic_t b_lru_ref; /* lru reclaim ref count */ > @@ -301,18 +297,6 @@ extern int xfs_buf_delwri_pushbuf(struct xfs_buf *, struct list_head *); > extern int xfs_buf_init(void); > extern void xfs_buf_terminate(void); > > -/* > - * These macros use the IO block map rather than b_bn. b_bn is now really > - * just for the buffer cache index for cached buffers. As IO does not use b_bn > - * anymore, uncached buffers do not use b_bn at all and hence must modify the IO > - * map directly. Uncached buffers are not allowed to be discontiguous, so this > - * is safe to do. > - * > - * In future, uncached buffers will pass the block number directly to the io > - * request function and hence these macros will go away at that point. > - */ > -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) > - > static inline xfs_daddr_t xfs_buf_daddr(struct xfs_buf *bp) > { > return bp->b_maps[0].bm_bn; > -- > 2.31.1 > ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 0/3] xfs: clean up buffer cache disk addressing @ 2021-08-10 5:28 Dave Chinner 2021-08-10 5:28 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 0 siblings, 1 reply; 12+ messages in thread From: Dave Chinner @ 2021-08-10 5:28 UTC (permalink / raw) To: linux-xfs Over time, we've moved from using bp->b_bn as the physical disk address for a buffer to using the address of the first buffer map attached to the buffer. This can be seen by the implementation of XFS_BUF_ADDR() macro: #define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) The bp->b_bn value is now used as the buffer cache index for the buffer, and it is always set to XFS_BUF_DADDR_NULL for uncached buffers. Hence code that uses bp->b_bn for the physical address of the buffer will not do the right thing when passed an uncached buffer. This series of patches addresses this problem. It adds a helper function xfs_buf_daddr() to extract the physical address of the buffer from it, and replaces all the open coded bp->b_bn accesses and the XFS_BUF_ADDR() users to use it. It then renames b_bn to b_index and converts all the internal cache lookup code to use b_index rather than b_bn. The result is that all code now uses xfs_buf_daddr() where physical addresses are required, and the cache index variable isn't named in a manner that engenders external use of access. The changes end up being relatively small, and the impact on userspace outside libxfs is even smaller (only a couple of dozen references to b_bn or XFS_BUF_ADDR). Version 1 - based on 5.14-rc4 + for-next + "xfs: rework feature flags" ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-10 5:28 [PATCH 0/3] xfs: clean up buffer cache disk addressing Dave Chinner @ 2021-08-10 5:28 ` Dave Chinner 2021-08-11 0:46 ` Darrick J. Wong 2021-08-12 8:23 ` Christoph Hellwig 0 siblings, 2 replies; 12+ messages in thread From: Dave Chinner @ 2021-08-10 5:28 UTC (permalink / raw) To: linux-xfs From: Dave Chinner <dchinner@redhat.com> TO stop external users from using b_bn as the disk address of the buffer, rename it to b_index to indicate that it is the buffer cache index, not the block number of the buffer. Code that needs the disk address should use xfs_buf_daddr() to obtain it. Do the rename and clean up any of the remaining b_bn cruft that is left over and is now unused. Signed-off-by: Dave Chinner <dchinner@redhat.com> --- fs/xfs/xfs_buf.c | 19 +++++++++++-------- fs/xfs/xfs_buf.h | 18 +----------------- 2 files changed, 12 insertions(+), 25 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index c1bb6e41595b..6f6c6937baaa 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -251,7 +251,7 @@ _xfs_buf_alloc( return error; } - bp->b_bn = map[0].bm_bn; + bp->b_index = map[0].bm_bn; bp->b_length = 0; for (i = 0; i < nmaps; i++) { bp->b_maps[i].bm_bn = map[i].bm_bn; @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( */ BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); - if (bp->b_bn != map->bm_bn) + if (bp->b_index != map->bm_bn) return 1; if (unlikely(bp->b_length != map->bm_len)) { @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { .min_size = 32, /* empty AGs have minimal footprint */ .nelem_hint = 16, .key_len = sizeof(xfs_daddr_t), - .key_offset = offsetof(struct xfs_buf, b_bn), + .key_offset = offsetof(struct xfs_buf, b_index), .head_offset = offsetof(struct xfs_buf, b_rhash_head), .automatic_shrinking = true, .obj_cmpfn = _xfs_buf_obj_cmp, @@ -853,7 +853,9 @@ xfs_buf_readahead_map( /* * Read an uncached buffer from disk. Allocates and returns a locked - * buffer containing the disk contents or nothing. + * buffer containing the disk contents or nothing. Uncached buffers always have + * a cache index of XFS_BUF_DADDR_NULL so we can easily determine if the buffer + * is cached or uncached during fault diagnosis. */ int xfs_buf_read_uncached( @@ -875,7 +877,7 @@ xfs_buf_read_uncached( /* set up the buffer for a read IO */ ASSERT(bp->b_map_count == 1); - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ + bp->b_index = XFS_BUF_DADDR_NULL; bp->b_maps[0].bm_bn = daddr; bp->b_flags |= XBF_READ; bp->b_ops = ops; @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( SHUTDOWN_CORRUPT_INCORE); return; } - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { + } else if (bp->b_index != XFS_BUF_DADDR_NULL) { struct xfs_mount *mp = bp->b_mount; /* @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( if (xfs_has_crc(mp)) { xfs_warn(mp, "%s: no buf ops on daddr 0x%llx len %d", - __func__, bp->b_bn, bp->b_length); + __func__, xfs_buf_daddr(bp), + bp->b_length); xfs_hex_dump(bp->b_addr, XFS_CORRUPTION_DUMP_LEN); dump_stack(); @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( xfs_buf_alert_ratelimited(bp, "XFS: Corruption Alert", "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", - (long long)bp->b_bn); + (long long)xfs_buf_daddr(bp)); } xfs_buf_rele(bp); } diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 6db2fba44b46..7e408c416607 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -134,11 +134,7 @@ struct xfs_buf { */ struct rhash_head b_rhash_head; /* pag buffer hash node */ - /* - * b_bn is the cache index. Do not use directly, use b_maps[0].bm_bn - * for the buffer disk address instead. - */ - xfs_daddr_t b_bn; + xfs_daddr_t b_index; /* buffer cache index */ int b_length; /* size of buffer in BBs */ atomic_t b_hold; /* reference count */ atomic_t b_lru_ref; /* lru reclaim ref count */ @@ -301,18 +297,6 @@ extern int xfs_buf_delwri_pushbuf(struct xfs_buf *, struct list_head *); extern int xfs_buf_init(void); extern void xfs_buf_terminate(void); -/* - * These macros use the IO block map rather than b_bn. b_bn is now really - * just for the buffer cache index for cached buffers. As IO does not use b_bn - * anymore, uncached buffers do not use b_bn at all and hence must modify the IO - * map directly. Uncached buffers are not allowed to be discontiguous, so this - * is safe to do. - * - * In future, uncached buffers will pass the block number directly to the io - * request function and hence these macros will go away at that point. - */ -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) - static inline xfs_daddr_t xfs_buf_daddr(struct xfs_buf *bp) { return bp->b_maps[0].bm_bn; -- 2.31.1 ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-10 5:28 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner @ 2021-08-11 0:46 ` Darrick J. Wong 2021-08-17 23:48 ` Dave Chinner 2021-08-12 8:23 ` Christoph Hellwig 1 sibling, 1 reply; 12+ messages in thread From: Darrick J. Wong @ 2021-08-11 0:46 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@redhat.com> > > TO stop external users from using b_bn as the disk address of the > buffer, rename it to b_index to indicate that it is the buffer cache > index, not the block number of the buffer. Code that needs the disk > address should use xfs_buf_daddr() to obtain it. > > Do the rename and clean up any of the remaining b_bn cruft that is > left over and is now unused. > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > --- > fs/xfs/xfs_buf.c | 19 +++++++++++-------- > fs/xfs/xfs_buf.h | 18 +----------------- > 2 files changed, 12 insertions(+), 25 deletions(-) > > diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c > index c1bb6e41595b..6f6c6937baaa 100644 > --- a/fs/xfs/xfs_buf.c > +++ b/fs/xfs/xfs_buf.c > @@ -251,7 +251,7 @@ _xfs_buf_alloc( > return error; > } > > - bp->b_bn = map[0].bm_bn; > + bp->b_index = map[0].bm_bn; > bp->b_length = 0; > for (i = 0; i < nmaps; i++) { > bp->b_maps[i].bm_bn = map[i].bm_bn; > @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( > */ > BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); > > - if (bp->b_bn != map->bm_bn) > + if (bp->b_index != map->bm_bn) > return 1; > > if (unlikely(bp->b_length != map->bm_len)) { > @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { > .min_size = 32, /* empty AGs have minimal footprint */ > .nelem_hint = 16, > .key_len = sizeof(xfs_daddr_t), > - .key_offset = offsetof(struct xfs_buf, b_bn), > + .key_offset = offsetof(struct xfs_buf, b_index), I would've called this field b_rhash_key, since "index" is a kind of vague. > .head_offset = offsetof(struct xfs_buf, b_rhash_head), > .automatic_shrinking = true, > .obj_cmpfn = _xfs_buf_obj_cmp, > @@ -853,7 +853,9 @@ xfs_buf_readahead_map( > > /* > * Read an uncached buffer from disk. Allocates and returns a locked > - * buffer containing the disk contents or nothing. > + * buffer containing the disk contents or nothing. Uncached buffers always have > + * a cache index of XFS_BUF_DADDR_NULL so we can easily determine if the buffer > + * is cached or uncached during fault diagnosis. > */ > int > xfs_buf_read_uncached( > @@ -875,7 +877,7 @@ xfs_buf_read_uncached( > > /* set up the buffer for a read IO */ > ASSERT(bp->b_map_count == 1); > - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ > + bp->b_index = XFS_BUF_DADDR_NULL; > bp->b_maps[0].bm_bn = daddr; > bp->b_flags |= XBF_READ; > bp->b_ops = ops; > @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( > SHUTDOWN_CORRUPT_INCORE); > return; > } > - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { > + } else if (bp->b_index != XFS_BUF_DADDR_NULL) { > struct xfs_mount *mp = bp->b_mount; > > /* > @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( > if (xfs_has_crc(mp)) { > xfs_warn(mp, > "%s: no buf ops on daddr 0x%llx len %d", > - __func__, bp->b_bn, bp->b_length); > + __func__, xfs_buf_daddr(bp), > + bp->b_length); > xfs_hex_dump(bp->b_addr, > XFS_CORRUPTION_DUMP_LEN); > dump_stack(); > @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( > xfs_buf_alert_ratelimited(bp, > "XFS: Corruption Alert", > "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", > - (long long)bp->b_bn); > + (long long)xfs_buf_daddr(bp)); These belong in the previous patch, right? Aside from those two things, the rest of the patch looks ready to go. --D > } > xfs_buf_rele(bp); > } > diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h > index 6db2fba44b46..7e408c416607 100644 > --- a/fs/xfs/xfs_buf.h > +++ b/fs/xfs/xfs_buf.h > @@ -134,11 +134,7 @@ struct xfs_buf { > */ > struct rhash_head b_rhash_head; /* pag buffer hash node */ > > - /* > - * b_bn is the cache index. Do not use directly, use b_maps[0].bm_bn > - * for the buffer disk address instead. > - */ > - xfs_daddr_t b_bn; > + xfs_daddr_t b_index; /* buffer cache index */ > int b_length; /* size of buffer in BBs */ > atomic_t b_hold; /* reference count */ > atomic_t b_lru_ref; /* lru reclaim ref count */ > @@ -301,18 +297,6 @@ extern int xfs_buf_delwri_pushbuf(struct xfs_buf *, struct list_head *); > extern int xfs_buf_init(void); > extern void xfs_buf_terminate(void); > > -/* > - * These macros use the IO block map rather than b_bn. b_bn is now really > - * just for the buffer cache index for cached buffers. As IO does not use b_bn > - * anymore, uncached buffers do not use b_bn at all and hence must modify the IO > - * map directly. Uncached buffers are not allowed to be discontiguous, so this > - * is safe to do. > - * > - * In future, uncached buffers will pass the block number directly to the io > - * request function and hence these macros will go away at that point. > - */ > -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) > - > static inline xfs_daddr_t xfs_buf_daddr(struct xfs_buf *bp) > { > return bp->b_maps[0].bm_bn; > -- > 2.31.1 > ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-11 0:46 ` Darrick J. Wong @ 2021-08-17 23:48 ` Dave Chinner 2021-08-17 23:56 ` Darrick J. Wong 0 siblings, 1 reply; 12+ messages in thread From: Dave Chinner @ 2021-08-17 23:48 UTC (permalink / raw) To: Darrick J. Wong; +Cc: linux-xfs On Tue, Aug 10, 2021 at 05:46:32PM -0700, Darrick J. Wong wrote: > On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote: > > From: Dave Chinner <dchinner@redhat.com> > > > > TO stop external users from using b_bn as the disk address of the > > buffer, rename it to b_index to indicate that it is the buffer cache > > index, not the block number of the buffer. Code that needs the disk > > address should use xfs_buf_daddr() to obtain it. > > > > Do the rename and clean up any of the remaining b_bn cruft that is > > left over and is now unused. > > > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > > --- > > fs/xfs/xfs_buf.c | 19 +++++++++++-------- > > fs/xfs/xfs_buf.h | 18 +----------------- > > 2 files changed, 12 insertions(+), 25 deletions(-) > > > > diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c > > index c1bb6e41595b..6f6c6937baaa 100644 > > --- a/fs/xfs/xfs_buf.c > > +++ b/fs/xfs/xfs_buf.c > > @@ -251,7 +251,7 @@ _xfs_buf_alloc( > > return error; > > } > > > > - bp->b_bn = map[0].bm_bn; > > + bp->b_index = map[0].bm_bn; > > bp->b_length = 0; > > for (i = 0; i < nmaps; i++) { > > bp->b_maps[i].bm_bn = map[i].bm_bn; > > @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( > > */ > > BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); > > > > - if (bp->b_bn != map->bm_bn) > > + if (bp->b_index != map->bm_bn) > > return 1; > > > > if (unlikely(bp->b_length != map->bm_len)) { > > @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { > > .min_size = 32, /* empty AGs have minimal footprint */ > > .nelem_hint = 16, > > .key_len = sizeof(xfs_daddr_t), > > - .key_offset = offsetof(struct xfs_buf, b_bn), > > + .key_offset = offsetof(struct xfs_buf, b_index), > > I would've called this field b_rhash_key, since "index" is a kind of > vague. Ok. > > @@ -875,7 +877,7 @@ xfs_buf_read_uncached( > > > > /* set up the buffer for a read IO */ > > ASSERT(bp->b_map_count == 1); > > - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ > > + bp->b_index = XFS_BUF_DADDR_NULL; > > bp->b_maps[0].bm_bn = daddr; > > bp->b_flags |= XBF_READ; > > bp->b_ops = ops; > > @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( > > SHUTDOWN_CORRUPT_INCORE); > > return; > > } > > - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { > > + } else if (bp->b_index != XFS_BUF_DADDR_NULL) { > > struct xfs_mount *mp = bp->b_mount; > > > > /* > > @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( > > if (xfs_has_crc(mp)) { > > xfs_warn(mp, > > "%s: no buf ops on daddr 0x%llx len %d", > > - __func__, bp->b_bn, bp->b_length); > > + __func__, xfs_buf_daddr(bp), > > + bp->b_length); > > xfs_hex_dump(bp->b_addr, > > XFS_CORRUPTION_DUMP_LEN); > > dump_stack(); > > @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( > > xfs_buf_alert_ratelimited(bp, > > "XFS: Corruption Alert", > > "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", > > - (long long)bp->b_bn); > > + (long long)xfs_buf_daddr(bp)); > > These belong in the previous patch, right? Depends on your POV. This patch cleans up all the internal (mis)uses of b_bn, while the previous patches addressed all the external uses. The mods could be in either, I just chose to split internal/external modification based on the file rather than on the specific (ab)use being corrected.... Cheers, Dave. -- Dave Chinner david@fromorbit.com ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-17 23:48 ` Dave Chinner @ 2021-08-17 23:56 ` Darrick J. Wong 2021-08-18 0:07 ` Dave Chinner 0 siblings, 1 reply; 12+ messages in thread From: Darrick J. Wong @ 2021-08-17 23:56 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Wed, Aug 18, 2021 at 09:48:27AM +1000, Dave Chinner wrote: > On Tue, Aug 10, 2021 at 05:46:32PM -0700, Darrick J. Wong wrote: > > On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote: > > > From: Dave Chinner <dchinner@redhat.com> > > > > > > TO stop external users from using b_bn as the disk address of the > > > buffer, rename it to b_index to indicate that it is the buffer cache > > > index, not the block number of the buffer. Code that needs the disk > > > address should use xfs_buf_daddr() to obtain it. > > > > > > Do the rename and clean up any of the remaining b_bn cruft that is > > > left over and is now unused. > > > > > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > > > --- > > > fs/xfs/xfs_buf.c | 19 +++++++++++-------- > > > fs/xfs/xfs_buf.h | 18 +----------------- > > > 2 files changed, 12 insertions(+), 25 deletions(-) > > > > > > diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c > > > index c1bb6e41595b..6f6c6937baaa 100644 > > > --- a/fs/xfs/xfs_buf.c > > > +++ b/fs/xfs/xfs_buf.c > > > @@ -251,7 +251,7 @@ _xfs_buf_alloc( > > > return error; > > > } > > > > > > - bp->b_bn = map[0].bm_bn; > > > + bp->b_index = map[0].bm_bn; > > > bp->b_length = 0; > > > for (i = 0; i < nmaps; i++) { > > > bp->b_maps[i].bm_bn = map[i].bm_bn; > > > @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( > > > */ > > > BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); > > > > > > - if (bp->b_bn != map->bm_bn) > > > + if (bp->b_index != map->bm_bn) > > > return 1; > > > > > > if (unlikely(bp->b_length != map->bm_len)) { > > > @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { > > > .min_size = 32, /* empty AGs have minimal footprint */ > > > .nelem_hint = 16, > > > .key_len = sizeof(xfs_daddr_t), > > > - .key_offset = offsetof(struct xfs_buf, b_bn), > > > + .key_offset = offsetof(struct xfs_buf, b_index), > > > > I would've called this field b_rhash_key, since "index" is a kind of > > vague. > > Ok. > > > > @@ -875,7 +877,7 @@ xfs_buf_read_uncached( > > > > > > /* set up the buffer for a read IO */ > > > ASSERT(bp->b_map_count == 1); > > > - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ > > > + bp->b_index = XFS_BUF_DADDR_NULL; > > > bp->b_maps[0].bm_bn = daddr; > > > bp->b_flags |= XBF_READ; > > > bp->b_ops = ops; > > > @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( > > > SHUTDOWN_CORRUPT_INCORE); > > > return; > > > } > > > - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { > > > + } else if (bp->b_index != XFS_BUF_DADDR_NULL) { > > > struct xfs_mount *mp = bp->b_mount; > > > > > > /* > > > @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( > > > if (xfs_has_crc(mp)) { > > > xfs_warn(mp, > > > "%s: no buf ops on daddr 0x%llx len %d", > > > - __func__, bp->b_bn, bp->b_length); > > > + __func__, xfs_buf_daddr(bp), > > > + bp->b_length); > > > xfs_hex_dump(bp->b_addr, > > > XFS_CORRUPTION_DUMP_LEN); > > > dump_stack(); > > > @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( > > > xfs_buf_alert_ratelimited(bp, > > > "XFS: Corruption Alert", > > > "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", > > > - (long long)bp->b_bn); > > > + (long long)xfs_buf_daddr(bp)); > > > > These belong in the previous patch, right? > > Depends on your POV. This patch cleans up all the internal (mis)uses of > b_bn, while the previous patches addressed all the external uses. > The mods could be in either, I just chose to split internal/external > modification based on the file rather than on the specific (ab)use > being corrected.... <nod> Ok then. Would you mind noting that in the commit message with something along the lines of "...and convert internal users."? My brain is likely to fall out before you repost this patch. :/ --D > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-17 23:56 ` Darrick J. Wong @ 2021-08-18 0:07 ` Dave Chinner 0 siblings, 0 replies; 12+ messages in thread From: Dave Chinner @ 2021-08-18 0:07 UTC (permalink / raw) To: Darrick J. Wong; +Cc: linux-xfs On Tue, Aug 17, 2021 at 04:56:09PM -0700, Darrick J. Wong wrote: > On Wed, Aug 18, 2021 at 09:48:27AM +1000, Dave Chinner wrote: > > On Tue, Aug 10, 2021 at 05:46:32PM -0700, Darrick J. Wong wrote: > > > On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote: > > > > From: Dave Chinner <dchinner@redhat.com> > > > > > > > > TO stop external users from using b_bn as the disk address of the > > > > buffer, rename it to b_index to indicate that it is the buffer cache > > > > index, not the block number of the buffer. Code that needs the disk > > > > address should use xfs_buf_daddr() to obtain it. > > > > > > > > Do the rename and clean up any of the remaining b_bn cruft that is > > > > left over and is now unused. > > > > > > > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > > > > --- > > > > fs/xfs/xfs_buf.c | 19 +++++++++++-------- > > > > fs/xfs/xfs_buf.h | 18 +----------------- > > > > 2 files changed, 12 insertions(+), 25 deletions(-) > > > > > > > > diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c > > > > index c1bb6e41595b..6f6c6937baaa 100644 > > > > --- a/fs/xfs/xfs_buf.c > > > > +++ b/fs/xfs/xfs_buf.c > > > > @@ -251,7 +251,7 @@ _xfs_buf_alloc( > > > > return error; > > > > } > > > > > > > > - bp->b_bn = map[0].bm_bn; > > > > + bp->b_index = map[0].bm_bn; > > > > bp->b_length = 0; > > > > for (i = 0; i < nmaps; i++) { > > > > bp->b_maps[i].bm_bn = map[i].bm_bn; > > > > @@ -459,7 +459,7 @@ _xfs_buf_obj_cmp( > > > > */ > > > > BUILD_BUG_ON(offsetof(struct xfs_buf_map, bm_bn) != 0); > > > > > > > > - if (bp->b_bn != map->bm_bn) > > > > + if (bp->b_index != map->bm_bn) > > > > return 1; > > > > > > > > if (unlikely(bp->b_length != map->bm_len)) { > > > > @@ -481,7 +481,7 @@ static const struct rhashtable_params xfs_buf_hash_params = { > > > > .min_size = 32, /* empty AGs have minimal footprint */ > > > > .nelem_hint = 16, > > > > .key_len = sizeof(xfs_daddr_t), > > > > - .key_offset = offsetof(struct xfs_buf, b_bn), > > > > + .key_offset = offsetof(struct xfs_buf, b_index), > > > > > > I would've called this field b_rhash_key, since "index" is a kind of > > > vague. > > > > Ok. > > > > > > @@ -875,7 +877,7 @@ xfs_buf_read_uncached( > > > > > > > > /* set up the buffer for a read IO */ > > > > ASSERT(bp->b_map_count == 1); > > > > - bp->b_bn = XFS_BUF_DADDR_NULL; /* always null for uncached buffers */ > > > > + bp->b_index = XFS_BUF_DADDR_NULL; > > > > bp->b_maps[0].bm_bn = daddr; > > > > bp->b_flags |= XBF_READ; > > > > bp->b_ops = ops; > > > > @@ -1513,7 +1515,7 @@ _xfs_buf_ioapply( > > > > SHUTDOWN_CORRUPT_INCORE); > > > > return; > > > > } > > > > - } else if (bp->b_bn != XFS_BUF_DADDR_NULL) { > > > > + } else if (bp->b_index != XFS_BUF_DADDR_NULL) { > > > > struct xfs_mount *mp = bp->b_mount; > > > > > > > > /* > > > > @@ -1523,7 +1525,8 @@ _xfs_buf_ioapply( > > > > if (xfs_has_crc(mp)) { > > > > xfs_warn(mp, > > > > "%s: no buf ops on daddr 0x%llx len %d", > > > > - __func__, bp->b_bn, bp->b_length); > > > > + __func__, xfs_buf_daddr(bp), > > > > + bp->b_length); > > > > xfs_hex_dump(bp->b_addr, > > > > XFS_CORRUPTION_DUMP_LEN); > > > > dump_stack(); > > > > @@ -1793,7 +1796,7 @@ xfs_buftarg_drain( > > > > xfs_buf_alert_ratelimited(bp, > > > > "XFS: Corruption Alert", > > > > "Corruption Alert: Buffer at daddr 0x%llx had permanent write failures!", > > > > - (long long)bp->b_bn); > > > > + (long long)xfs_buf_daddr(bp)); > > > > > > These belong in the previous patch, right? > > > > Depends on your POV. This patch cleans up all the internal (mis)uses of > > b_bn, while the previous patches addressed all the external uses. > > The mods could be in either, I just chose to split internal/external > > modification based on the file rather than on the specific (ab)use > > being corrected.... > > <nod> Ok then. Would you mind noting that in the commit message with > something along the lines of "...and convert internal users."? My brain > is likely to fall out before you repost this patch. :/ Already done. The previous patch already said "Stop directly referencing b_bn in code outside the buffer cache, [...]", this one now says "Do the rename and clean up any of the remaining internal b_bn users. [...]". Cheers, Dave. -- Dave Chinner david@fromorbit.com ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 3/3] xfs: rename buffer cache index variable b_bn 2021-08-10 5:28 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 2021-08-11 0:46 ` Darrick J. Wong @ 2021-08-12 8:23 ` Christoph Hellwig 1 sibling, 0 replies; 12+ messages in thread From: Christoph Hellwig @ 2021-08-12 8:23 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@redhat.com> > > TO stop external users from using b_bn as the disk address of the > buffer, rename it to b_index to indicate that it is the buffer cache > index, not the block number of the buffer. Code that needs the disk > address should use xfs_buf_daddr() to obtain it. > > Do the rename and clean up any of the remaining b_bn cruft that is > left over and is now unused. Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de> Although the XFS_BUF_SET_ADDR really is a separate thing and should probably have been a separate patch. ^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2021-08-19 2:03 UTC | newest] Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-08-19 0:00 [PATCH 0/3 v2] xfs: clean up buffer cache disk addressing Dave Chinner 2021-08-19 0:00 ` [PATCH 1/3] xfs: introduce xfs_buf_daddr() Dave Chinner 2021-08-19 0:00 ` [PATCH 2/3] xfs: convert bp->b_bn references to xfs_buf_daddr() Dave Chinner 2021-08-19 2:03 ` Darrick J. Wong 2021-08-19 0:00 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 2021-08-19 1:59 ` Darrick J. Wong -- strict thread matches above, loose matches on Subject: below -- 2021-08-10 5:28 [PATCH 0/3] xfs: clean up buffer cache disk addressing Dave Chinner 2021-08-10 5:28 ` [PATCH 3/3] xfs: rename buffer cache index variable b_bn Dave Chinner 2021-08-11 0:46 ` Darrick J. Wong 2021-08-17 23:48 ` Dave Chinner 2021-08-17 23:56 ` Darrick J. Wong 2021-08-18 0:07 ` Dave Chinner 2021-08-12 8:23 ` Christoph Hellwig
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