Merge tag 'xfs-6.6-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Chandan Babu:

 - Fix an integer overflow bug when processing an fsmap call

 - Fix crash due to CPU hot remove event racing with filesystem mount
   operation

 - During read-only mount, XFS does not allow the contents of the log to
   be recovered when there are one or more unrecognized rcompat features
   in the primary superblock, since the log might have intent items
   which the kernel does not know how to process

 - During recovery of log intent items, XFS now reserves log space
   sufficient for one cycle of a permanent transaction to execute.
   Otherwise, this could lead to livelocks due to non-availability of
   log space

 - On an fs which has an ondisk unlinked inode list, trying to delete a
   file or allocating an O_TMPFILE file can cause the fs to the shutdown
   if the first inode in the ondisk inode list is not present in the
   inode cache. The bug is solved by explicitly loading the first inode
   in the ondisk unlinked inode list into the inode cache if it is not
   already cached

   A similar problem arises when the uncached inode is present in the
   middle of the ondisk unlinked inode list. This second bug is
   triggered when executing operations like quotacheck and bulkstat. In
   this case, XFS now reads in the entire ondisk unlinked inode list

 - Enable LARP mode only on recent v5 filesystems

 - Fix a out of bounds memory access in scrub

 - Fix a performance bug when locating the tail of the log during
   mounting a filesystem

* tag 'xfs-6.6-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: use roundup_pow_of_two instead of ffs during xlog_find_tail
  xfs: only call xchk_stats_merge after validating scrub inputs
  xfs: require a relatively recent V5 filesystem for LARP mode
  xfs: make inode unlinked bucket recovery work with quotacheck
  xfs: load uncached unlinked inodes into memory on demand
  xfs: reserve less log space when recovering log intent items
  xfs: fix log recovery when unknown rocompat bits are set
  xfs: reload entire unlinked bucket lists
  xfs: allow inode inactivation during a ro mount log recovery
  xfs: use i_prev_unlinked to distinguish inodes that are not on the unlinked list
  xfs: remove CPU hotplug infrastructure
  xfs: remove the all-mounts list
  xfs: use per-mount cpumask to track nonempty percpu inodegc lists
  xfs: fix an agbno overflow in __xfs_getfsmap_datadev
  xfs: fix per-cpu CIL structure aggregation racing with dying cpus
  xfs: fix select in config XFS_ONLINE_SCRUB_STATS

1 files changed, 32 insertions, 2 deletions

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 7547caf2f2ab..0c5bdb91152e 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -68,8 +68,21 @@ typedef struct xfs_inode {
 	uint64_t		i_diflags2;	/* XFS_DIFLAG2_... */
 	struct timespec64	i_crtime;	/* time created */
 
-	/* unlinked list pointers */
+	/*
+	 * Unlinked list pointers.  These point to the next and previous inodes
+	 * in the AGI unlinked bucket list, respectively.  These fields can
+	 * only be updated with the AGI locked.
+	 *
+	 * i_next_unlinked caches di_next_unlinked.
+	 */
 	xfs_agino_t		i_next_unlinked;
+
+	/*
+	 * If the inode is not on an unlinked list, this field is zero.  If the
+	 * inode is the first element in an unlinked list, this field is
+	 * NULLAGINO.  Otherwise, i_prev_unlinked points to the previous inode
+	 * in the unlinked list.
+	 */
 	xfs_agino_t		i_prev_unlinked;
 
 	/* VFS inode */
@@ -81,6 +94,11 @@ typedef struct xfs_inode {
 	struct list_head	i_ioend_list;
 } xfs_inode_t;
 
+static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
+{
+	return ip->i_prev_unlinked != 0;
+}
+
 static inline bool xfs_inode_has_attr_fork(struct xfs_inode *ip)
 {
 	return ip->i_forkoff > 0;
@@ -326,6 +344,9 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
  */
 #define XFS_INACTIVATING	(1 << 13)
 
+/* Quotacheck is running but inode has not been added to quota counts. */
+#define XFS_IQUOTAUNCHECKED	(1 << 14)
+
 /* All inode state flags related to inode reclaim. */
 #define XFS_ALL_IRECLAIM_FLAGS	(XFS_IRECLAIMABLE | \
 				 XFS_IRECLAIM | \
@@ -340,7 +361,7 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
 #define XFS_IRECLAIM_RESET_FLAGS	\
 	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
 	 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
-	 XFS_INACTIVATING)
+	 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
 
 /*
  * Flags for inode locking.
@@ -575,4 +596,13 @@ void xfs_end_io(struct work_struct *work);
 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
 
+static inline bool
+xfs_inode_unlinked_incomplete(
+	struct xfs_inode	*ip)
+{
+	return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
+}
+int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
+int xfs_inode_reload_unlinked(struct xfs_inode *ip);
+
 #endif	/* __XFS_INODE_H__ */