diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c index 6e2fe2d6250b..d32716fb2fec 100644 --- a/fs/xfs/scrub/inode.c +++ b/fs/xfs/scrub/inode.c @@ -739,6 +739,23 @@ xchk_inode_check_reflink_iflag( xchk_ino_set_corrupt(sc, ino); } +/* + * If this inode has zero link count, it must be on the unlinked list. If + * it has nonzero link count, it must not be on the unlinked list. + */ +STATIC void +xchk_inode_check_unlinked( + struct xfs_scrub *sc) +{ + if (VFS_I(sc->ip)->i_nlink == 0) { + if (!xfs_inode_on_unlinked_list(sc->ip)) + xchk_ino_set_corrupt(sc, sc->ip->i_ino); + } else { + if (xfs_inode_on_unlinked_list(sc->ip)) + xchk_ino_set_corrupt(sc, sc->ip->i_ino); + } +} + /* Scrub an inode. */ int xchk_inode( @@ -771,6 +788,8 @@ xchk_inode( if (S_ISREG(VFS_I(sc->ip)->i_mode)) xchk_inode_check_reflink_iflag(sc, sc->ip->i_ino); + xchk_inode_check_unlinked(sc); + xchk_inode_xref(sc, sc->ip->i_ino, &di); out: return error; diff --git a/fs/xfs/scrub/inode_repair.c b/fs/xfs/scrub/inode_repair.c index 097afba3043f..c743772a523e 100644 --- a/fs/xfs/scrub/inode_repair.c +++ b/fs/xfs/scrub/inode_repair.c @@ -1745,6 +1745,46 @@ xrep_inode_problems( return xrep_roll_trans(sc); } +/* + * Make sure this inode's unlinked list pointers are consistent with its + * link count. + */ +STATIC int +xrep_inode_unlinked( + struct xfs_scrub *sc) +{ + unsigned int nlink = VFS_I(sc->ip)->i_nlink; + int error; + + /* + * If this inode is linked from the directory tree and on the unlinked + * list, remove it from the unlinked list. + */ + if (nlink > 0 && xfs_inode_on_unlinked_list(sc->ip)) { + struct xfs_perag *pag; + int error; + + pag = xfs_perag_get(sc->mp, + XFS_INO_TO_AGNO(sc->mp, sc->ip->i_ino)); + error = xfs_iunlink_remove(sc->tp, pag, sc->ip); + xfs_perag_put(pag); + if (error) + return error; + } + + /* + * If this inode is not linked from the directory tree yet not on the + * unlinked list, put it on the unlinked list. + */ + if (nlink == 0 && !xfs_inode_on_unlinked_list(sc->ip)) { + error = xfs_iunlink(sc->tp, sc->ip); + if (error) + return error; + } + + return 0; +} + /* Repair an inode's fields. */ int xrep_inode( @@ -1794,5 +1834,10 @@ xrep_inode( return error; } + /* Reconnect incore unlinked list */ + error = xrep_inode_unlinked(sc); + if (error) + return error; + return xrep_defer_finish(sc); } diff --git a/fs/xfs/scrub/nlinks_repair.c b/fs/xfs/scrub/nlinks_repair.c index b87618322f55..58cacb8e94c1 100644 --- a/fs/xfs/scrub/nlinks_repair.c +++ b/fs/xfs/scrub/nlinks_repair.c @@ -17,6 +17,7 @@ #include "xfs_iwalk.h" #include "xfs_ialloc.h" #include "xfs_sb.h" +#include "xfs_ag.h" #include "scrub/scrub.h" #include "scrub/common.h" #include "scrub/repair.h" @@ -36,6 +37,20 @@ * inode is locked. */ +/* Remove an inode from the unlinked list. */ +STATIC int +xrep_nlinks_iunlink_remove( + struct xfs_scrub *sc) +{ + struct xfs_perag *pag; + int error; + + pag = xfs_perag_get(sc->mp, XFS_INO_TO_AGNO(sc->mp, sc->ip->i_ino)); + error = xfs_iunlink_remove(sc->tp, pag, sc->ip); + xfs_perag_put(pag); + return error; +} + /* * Correct the link count of the given inode. Because we have to grab locks * and resources in a certain order, it's possible that this will be a no-op. @@ -99,16 +114,25 @@ xrep_nlinks_repair_inode( } /* - * We did not find any links to this inode. If the inode agrees, we - * have nothing further to do. If not, the inode has a nonzero link - * count and we don't have anywhere to graft the child onto. Dropping - * a live inode's link count to zero can cause unexpected shutdowns in - * inactivation, so leave it alone. + * If this inode is linked from the directory tree and on the unlinked + * list, remove it from the unlinked list. */ - if (total_links == 0) { - if (actual_nlink != 0) - trace_xrep_nlinks_unfixable_inode(mp, ip, &obs); - goto out_trans; + if (total_links > 0 && xfs_inode_on_unlinked_list(ip)) { + error = xrep_nlinks_iunlink_remove(sc); + if (error) + goto out_trans; + dirty = true; + } + + /* + * If this inode is not linked from the directory tree yet not on the + * unlinked list, put it on the unlinked list. + */ + if (total_links == 0 && !xfs_inode_on_unlinked_list(ip)) { + error = xfs_iunlink(sc->tp, ip); + if (error) + goto out_trans; + dirty = true; } /* Commit the new link count if it changed. */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index ac92c0525d9b..b24c0e23d37d 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -42,9 +42,6 @@ struct kmem_cache *xfs_inode_cache; -STATIC int xfs_iunlink_remove(struct xfs_trans *tp, struct xfs_perag *pag, - struct xfs_inode *); - /* * helper function to extract extent size hint from inode */ @@ -2252,7 +2249,7 @@ xfs_iunlink_remove_inode( /* * Pull the on-disk inode from the AGI unlinked list. */ -STATIC int +int xfs_iunlink_remove( struct xfs_trans *tp, struct xfs_perag *pag, diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 596eec715675..8157ae7f8e59 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -617,6 +617,8 @@ extern struct kmem_cache *xfs_inode_cache; bool xfs_inode_needs_inactive(struct xfs_inode *ip); int xfs_iunlink(struct xfs_trans *tp, struct xfs_inode *ip); +int xfs_iunlink_remove(struct xfs_trans *tp, struct xfs_perag *pag, + struct xfs_inode *ip); void xfs_end_io(struct work_struct *work);