diff options
| -rw-r--r-- | sys/fs/ext2fs/ext2_alloc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/fs/ext2fs/ext2_alloc.c b/sys/fs/ext2fs/ext2_alloc.c index 7867a87..a701087 100644 --- a/sys/fs/ext2fs/ext2_alloc.c +++ b/sys/fs/ext2fs/ext2_alloc.c @@ -197,6 +197,18 @@ ext2_reallocblks(ap) panic("ext2_reallocblks: non-cluster"); #endif /* + * If the cluster crosses the boundary for the first indirect + * block, leave space for the indirect block. Indirect blocks + * are initially laid out in a position after the last direct + * block. Block reallocation would usually destroy locality by + * moving the indirect block out of the way to make room for + * data blocks if we didn't compensate here. We should also do + * this for other indirect block boundaries, but it is only + * important for the first one. + */ + if (start_lbn < NDADDR && end_lbn >= NDADDR) + return (ENOSPC); + /* * If the latest allocation is in a new cylinder group, assume that * the filesystem has decided to move and do not force it back to * the previous cylinder group. |
