From 77d61fe45e720577a2cc0e9580fbc57d8faa7232 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 3 Oct 2016 09:11:26 -0700 Subject: xfs: log bmap intent items Provide a mechanism for higher levels to create BUI/BUD items, submit them to the log, and a stub function to deal with recovered BUI items. These parts will be connected to the rmapbt in a later patch. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_bmap_item.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) (limited to 'fs/xfs/xfs_bmap_item.c') diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c index ea736af649de..9b3a936fb384 100644 --- a/fs/xfs/xfs_bmap_item.c +++ b/fs/xfs/xfs_bmap_item.c @@ -22,12 +22,18 @@ #include "xfs_format.h" #include "xfs_log_format.h" #include "xfs_trans_resv.h" +#include "xfs_bit.h" #include "xfs_mount.h" +#include "xfs_defer.h" +#include "xfs_inode.h" #include "xfs_trans.h" #include "xfs_trans_priv.h" #include "xfs_buf_item.h" #include "xfs_bmap_item.h" #include "xfs_log.h" +#include "xfs_bmap.h" +#include "xfs_icache.h" +#include "xfs_trace.h" kmem_zone_t *xfs_bui_zone; @@ -372,3 +378,66 @@ xfs_bud_init( return budp; } + +/* + * Process a bmap update intent item that was recovered from the log. + * We need to update some inode's bmbt. + */ +int +xfs_bui_recover( + struct xfs_mount *mp, + struct xfs_bui_log_item *buip) +{ + int error = 0; + struct xfs_map_extent *bmap; + xfs_fsblock_t startblock_fsb; + xfs_fsblock_t inode_fsb; + bool op_ok; + + ASSERT(!test_bit(XFS_BUI_RECOVERED, &buip->bui_flags)); + + /* Only one mapping operation per BUI... */ + if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) { + set_bit(XFS_BUI_RECOVERED, &buip->bui_flags); + xfs_bui_release(buip); + return -EIO; + } + + /* + * First check the validity of the extent described by the + * BUI. If anything is bad, then toss the BUI. + */ + bmap = &buip->bui_format.bui_extents[0]; + startblock_fsb = XFS_BB_TO_FSB(mp, + XFS_FSB_TO_DADDR(mp, bmap->me_startblock)); + inode_fsb = XFS_BB_TO_FSB(mp, XFS_FSB_TO_DADDR(mp, + XFS_INO_TO_FSB(mp, bmap->me_owner))); + switch (bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) { + case XFS_BMAP_MAP: + case XFS_BMAP_UNMAP: + op_ok = true; + break; + default: + op_ok = false; + break; + } + if (!op_ok || startblock_fsb == 0 || + bmap->me_len == 0 || + inode_fsb == 0 || + startblock_fsb >= mp->m_sb.sb_dblocks || + bmap->me_len >= mp->m_sb.sb_agblocks || + inode_fsb >= mp->m_sb.sb_dblocks || + (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS)) { + /* + * This will pull the BUI from the AIL and + * free the memory associated with it. + */ + set_bit(XFS_BUI_RECOVERED, &buip->bui_flags); + xfs_bui_release(buip); + return -EIO; + } + + set_bit(XFS_BUI_RECOVERED, &buip->bui_flags); + xfs_bui_release(buip); + return error; +} -- cgit v1.2.3