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* fatfs.h (struct disknode): New member DIRNODE.
* inode.c (read_node): Added assertion to be sure the directory
can always be found. Add directory dependancy to node by
initializing DIRNODE and holding a reference.
(diskfs_node_norefs): Release reference to DIRNODE.
(write_node): Don't use diskfs_cached_lookup to lookup the
directory, use DIRNODE instead and lock DP. Don't use diskfs_nput,
use mutex_unlock instead.
(diskfs_alloc_node): Add directory dependancy to node by
initializing DIRNODE and holding a reference.
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* inode.c (read_node): Fix typo.
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* fat.c (fat_read_sblock): Don't test if the root dir size is a
multiple of sectors_per_cluster. Reported by Barry deFreese
(bddebian@cox.net).
* fatfs.h (LOG2_BLOCKS_PER_CLUSTER): New macro.
(FAT_FIRST_CLUSTER_BLOCK): Likewise.
(fat_first_cluster_byte): Macro removed.
* inode.c (read_node): Correctly setup diskfs_root_node for FAT32
filesystems.
* pager.c (fat_getcluster): Check for reading beyond allocsize
correctly for file systems with a clustersize > vm_page_size.
(file_pager_read_small_page): Don't use byte offsets when
calculating the block.
(file_pager_read_huge_page): Likewise.
(pending_clusters_write): Likewise.
(file_pager_write_small_page): Likewise.
(STAT_INC): Cast to void to suppress warning.
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* dir.c (diskfs_get_directs): Consider ENTRY when adding
"." and ".." for the rootnode.
* inode.c (read_node): Use ifind instead of diskfs_cached_lookup
and do not use diskfs_nput anymore.
* main.c (diskfs_S_fsys_getfile): New function.
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