fs/xfs/scrub/orphanage.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2021-2024 Oracle.  All Rights Reserved.
   4  * Author: Darrick J. Wong <djwong@kernel.org>
   5  */
   6 #ifndef __XFS_SCRUB_ORPHANAGE_H__
   7 #define __XFS_SCRUB_ORPHANAGE_H__
   8
   9 #ifdef CONFIG_XFS_ONLINE_REPAIR
  10 int xrep_orphanage_create(struct xfs_scrub *sc);
  11
  12 /*
  13  * If we're doing a repair, ensure that the orphanage exists and attach it to
  14  * the scrub context.
  15  */
  16 static inline int
  17 xrep_orphanage_try_create(
  18         struct xfs_scrub        *sc)
  19 {
  20         int                     error;
  21
  22         ASSERT(sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR);
  23
  24         error = xrep_orphanage_create(sc);
  25         switch (error) {
  26         case 0:
  27         case -ENOENT:
  28         case -ENOTDIR:
  29         case -ENOSPC:
  30                 /*
  31                  * If the orphanage can't be found or isn't a directory, we'll
  32                  * keep going, but we won't be able to attach the file to the
  33                  * orphanage if we can't find the parent.
  34                  */
  35                 return 0;
  36         }
  37
  38         return error;
  39 }
  40
  41 int xrep_orphanage_iolock_two(struct xfs_scrub *sc);
  42
  43 void xrep_orphanage_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
  44 bool xrep_orphanage_ilock_nowait(struct xfs_scrub *sc,
  45                 unsigned int ilock_flags);
  46 void xrep_orphanage_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);
  47
  48 void xrep_orphanage_rele(struct xfs_scrub *sc);
  49
  50 /* Information about a request to add a file to the orphanage. */
  51 struct xrep_adoption {
  52         struct xfs_scrub        *sc;
  53
  54         /* Name used for the adoption. */
  55         struct xfs_name         *xname;
  56
  57         /* Parent pointer context tracking */
  58         struct xfs_parent_args  ppargs;
  59
  60         /* Block reservations for orphanage and child (if directory). */
  61         unsigned int            orphanage_blkres;
  62         unsigned int            child_blkres;
  63
  64         /*
  65          * Does the caller want us to bump the child link count?  This is not
  66          * needed when reattaching files that have become disconnected but have
  67          * nlink > 1.  It is necessary when changing the directory tree
  68          * structure.
  69          */
  70         bool                    bump_child_nlink:1;
  71 };
  72
  73 bool xrep_orphanage_can_adopt(struct xfs_scrub *sc);
  74
  75 int xrep_adoption_trans_alloc(struct xfs_scrub *sc,
  76                 struct xrep_adoption *adopt);
  77 int xrep_adoption_compute_name(struct xrep_adoption *adopt,
  78                 struct xfs_name *xname);
  79 int xrep_adoption_move(struct xrep_adoption *adopt);
  80 int xrep_adoption_trans_roll(struct xrep_adoption *adopt);
  81 #else
  82 struct xrep_adoption { /* empty */ };
  83 # define xrep_orphanage_rele(sc)        ((void)0)
  84 #endif /* CONFIG_XFS_ONLINE_REPAIR */
  85
  86 #endif /* __XFS_SCRUB_ORPHANAGE_H__ */