mirror of https://github.com/vitalif/e2fsprogs
acbca26e25
In ext2fs_extent_set_bmap() and ext2fs_punch_extent(), fix the parents when altering either end of an extent so that the parent nodes reflect the added mapping. There's a slight complication to using fix_parents: if there are two mappings to an lblk in the tree, the value of handle->path->curr can point to either extent afterwards), which is documented in a comment. Some additional color commentary from Darrick: In the _set_bmap() case, I noticed that the "remapping last block in extent" case would produce symptoms if we are trying to remap a block from "extent" to "next_extent", and the two extents are pointed to by different index nodes. _extent_replace(..., next_extent) updates e_lblk in the leaf extent, but because there's no _extent_fix_parents() call, the index nodes never get updated. In the _punch_extent() case, we conclude that we need to split an extent into two pieces since we're punching out the middle. If the extent is the last extent in the block, the second extent will be inserted into a new leaf node block. Without _fix_parents(), the index node doesn't seem to get updated. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> |
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| .. | ||
| blkid | ||
| e2p | ||
| et | ||
| ext2fs | ||
| quota | ||
| ss | ||
| uuid | ||
| Makefile.bsd-lib | ||
| Makefile.checker | ||
| Makefile.darwin-lib | ||
| Makefile.elf-lib | ||
| Makefile.library | ||
| Makefile.profile | ||
| Makefile.solaris-lib | ||
| config.h.in | ||
| dirpaths.h.in | ||
| fpopen.c | ||