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8c38ab0320
linux/fs/xfs
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David Chinner 8c38ab0320 [XFS] Prevent looping in xfs_sync_inodes_ag 
If the last block of the AG has inodes in it and the AG is an exactly
power-of-2 size then the last inode in the AG points to the last block in
the AG. If we try to find the next inode in the AG by adding one to the
inode number, we increment the inode number past the size of the AG. The
result is that the macro XFS_INO_TO_AGINO() will strip the AG portion of
the inode number and return an inode number of zero.

That is, instead of terminating the lookup loop because we hit the inode
number went outside the valid range for the AG, the search index returns
to zero and we start traversing the radix tree from the start again. This
results in an endless loop in xfs_sync_inodes_ag().

Fix it be detecting if the new search index decreases as a result of
incrementing the current inode number. That indicate an overflow and hence
that we have finished processing the AG so we can terminate the loop.

SGI-PV: 988142

SGI-Modid: xfs-linux-melb:xfs-kern:32335a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
2008-10-30 17:38:00 +11:00
..
linux-2.6 [XFS] Prevent looping in xfs_sync_inodes_ag 2008-10-30 17:38:00 +11:00
quota [XFS] Kill xfs_sync() 2008-10-30 17:16:11 +11:00
support [XFS] Show buffer address with debug hexdump on corruption 2008-10-30 17:05:58 +11:00
Kconfig
Makefile [XFS] move sync code to its own file 2008-10-30 17:06:08 +11:00
xfs_acl.c [XFS] kill bhv_vnode_t 2008-08-13 16:22:40 +10:00
xfs_acl.h [XFS] kill bhv_vnode_t 2008-08-13 16:22:40 +10:00
xfs_ag.h [XFS] mark inodes for reclaim via a tag in the inode radix tree 2008-10-30 17:37:26 +11:00
xfs_alloc_btree.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_alloc_btree.h [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_alloc.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_alloc.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_arch.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_attr_leaf.c [XFS] Move xfs_attr_rolltrans to xfs_trans_roll 2008-08-13 16:05:49 +10:00
xfs_attr_leaf.h [XFS] Move xfs_attr_rolltrans to xfs_trans_roll 2008-08-13 16:05:49 +10:00
xfs_attr_sf.h
xfs_attr.c [XFS] Move xfs_attr_rolltrans to xfs_trans_roll 2008-08-13 16:05:49 +10:00
xfs_attr.h [XFS] Move attr log alloc size calculator to another function. 2008-08-13 16:03:35 +10:00
xfs_bit.c [XFS] Use the generic bitops rather than implementing them ourselves. 2008-08-13 15:41:12 +10:00
xfs_bit.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_bmap_btree.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_bmap_btree.h [XFS] Move XFS_BMAP_SANITY_CHECK out of line. 2008-10-30 17:14:43 +11:00
xfs_bmap.c [XFS] Move XFS_BMAP_SANITY_CHECK out of line. 2008-10-30 17:14:43 +11:00
xfs_bmap.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_btree_trace.c [XFS] make btree tracing generic 2008-10-30 16:58:50 +11:00
xfs_btree_trace.h [XFS] make btree tracing generic 2008-10-30 16:58:50 +11:00
xfs_btree.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_btree.h [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_buf_item.c [XFS] Fix use-after-free with buffers 2008-09-17 16:52:13 +10:00
xfs_buf_item.h
xfs_clnt.h
xfs_da_btree.c [XFS] streamline init/exit path 2008-07-28 16:59:25 +10:00
xfs_da_btree.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_dfrag.c [XFS] Prevent lockdep false positives when locking two inodes. 2008-09-17 16:51:21 +10:00
xfs_dfrag.h
xfs_dinode.h [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_dir2_block.c
xfs_dir2_block.h
xfs_dir2_data.c
xfs_dir2_data.h
xfs_dir2_leaf.c [XFS] Fix CI lookup in leaf-form directories 2008-07-28 16:59:06 +10:00
xfs_dir2_leaf.h
xfs_dir2_node.c [XFS] Fix returning case-preserved name with CI node form directories 2008-07-28 16:59:01 +10:00
xfs_dir2_node.h
xfs_dir2_sf.c
xfs_dir2_sf.h [XFS] Pack some shortform dir2 structures for the ARM old ABI 2008-07-28 16:58:50 +10:00
xfs_dir2_trace.c
xfs_dir2_trace.h
xfs_dir2.c
xfs_dir2.h
xfs_dmapi.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
xfs_dmops.c
xfs_error.c [XFS] kill INDUCE_IO_ERROR 2008-08-13 16:17:37 +10:00
xfs_error.h [XFS] kill INDUCE_IO_ERROR 2008-08-13 16:17:37 +10:00
xfs_extfree_item.c
xfs_extfree_item.h
xfs_filestream.c [XFS] Use KM_NOFS for debug trace buffers 2008-08-13 16:51:57 +10:00
xfs_filestream.h
xfs_fs.h [XFS] attrmulti cleanup 2008-07-28 16:59:09 +10:00
xfs_fsops.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_fsops.h
xfs_ialloc_btree.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_ialloc_btree.h [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_ialloc.c [XFS] implement generic xfs_btree_get_rec 2008-10-30 16:58:11 +11:00
xfs_ialloc.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_iget.c [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_imap.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_inode_item.c [XFS] replace inode flush semaphore with a completion 2008-08-13 16:41:16 +10:00
xfs_inode_item.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_inode.c [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_inode.h [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_inum.h
xfs_iomap.c [XFS] use minleft when allocating in xfs_bmbt_split() 2008-07-28 16:59:10 +10:00
xfs_iomap.h
xfs_itable.c [XFS] implement generic xfs_btree_increment 2008-10-30 16:55:45 +11:00
xfs_itable.h
xfs_log_priv.h [XFS] Move memory allocations for log tracing out of the critical path 2008-09-17 16:45:37 +10:00
xfs_log_recover.c [XFS] Always use struct xfs_btree_block instead of short / longform 2008-10-30 17:14:34 +11:00
xfs_log_recover.h
xfs_log.c Fix barrier fail detection in XFS 2008-10-10 11:08:07 -07:00
xfs_log.h [XFS] cleanup xfs_mountfs 2008-08-13 16:49:32 +10:00
xfs_mount.c [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_mount.h [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_mru_cache.c [XFS] streamline init/exit path 2008-07-28 16:59:25 +10:00
xfs_mru_cache.h
xfs_qmops.c
xfs_quota.h
xfs_refcache.h
xfs_rename.c [XFS] Don't update mtime on rename source 2008-07-28 16:59:14 +10:00
xfs_rtalloc.c [XFS] Use the generic bitops rather than implementing them ourselves. 2008-08-13 15:41:12 +10:00
xfs_rtalloc.h
xfs_rw.c [XFS] replace the XFS buf iodone semaphore with a completion 2008-08-13 16:36:11 +10:00
xfs_rw.h
xfs_sb.h
xfs_trans_ail.c
xfs_trans_buf.c [XFS] remove shouting-indirection macros from xfs_trans.h 2008-08-13 16:10:52 +10:00
xfs_trans_extfree.c
xfs_trans_inode.c
xfs_trans_item.c [XFS] remove shouting-indirection macros from xfs_trans.h 2008-08-13 16:10:52 +10:00
xfs_trans_priv.h
xfs_trans_space.h
xfs_trans.c [XFS] remove shouting-indirection macros from xfs_trans.h 2008-08-13 16:10:52 +10:00
xfs_trans.h [XFS] Sync up kernel and user-space headers 2008-10-30 17:05:38 +11:00
xfs_types.h
xfs_utils.c [XFS] Avoid directly referencing the VFS inode. 2008-08-13 15:45:15 +10:00
xfs_utils.h [XFS] implement IHOLD/IRELE directly 2008-08-13 16:13:45 +10:00
xfs_vfsops.c [XFS] Move remaining quiesce code. 2008-10-30 17:16:21 +11:00
xfs_vfsops.h [XFS] Move remaining quiesce code. 2008-10-30 17:16:21 +11:00
xfs_vnodeops.c [XFS] kill deleted inodes list 2008-10-30 17:37:49 +11:00
xfs_vnodeops.h [XFS] Now that xfs_setattr is only used for attributes set from ->setattr 2008-07-28 16:59:37 +10:00
xfs.h [XFS] make btree tracing generic 2008-10-30 16:55:13 +11:00