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* hyper.c (get_hypermetadata): Avoid overflow in calculation of disk
size vs superblock-specified requirement.
Add a warning for wasted disk blocks after last filesystem block.
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* ext2fs.h (group_desc): Inline function replaced with macro.
(group_desc_image): New variable.
* hyper.c (get_hypermetadata): Initialize it.
* ext2fs.h (sblock_block): Declare new variable.
(SBLOCK_LBLOCK): Macro removed.
(SBLOCK_OFFS): Define in terms of sblock_block.
* ext2fs.c (options): Add --sblock/-S.
(parse_opt): Parse it to set sblock_block.
* hyper.c (sblock_block): New variable.
(get_hypermetadata): Use sblock_block instead of constant SBLOCK_BLOCK.
* hyper.c (get_hypermetadata): Use EXT2_MAX_BLOCK_SIZE instead of
hard-wired 8192. Don't use ffs to compute log2_block_size, and don't
check for the impossible case of non-power-of-two block size (the
block size specification we start with is given as a power of two!).
* ext2fs.h (block_size): Change type to unsigned int.
(BLOCKSIZE_SCALE): Just use SBLOCK->s_log_block_size directly.
* hyper.c (get_hypermetadata): Fix printf formats to silence warning.
* dir.c (dirscanblock): Likewise.
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* dir.c (diskfs_get_directs): Fix sloppy bugs in last change.
* hyper.c (allocate_mod_map): Likewise.
* pager.c (get_page_buf): Likewise.
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* dir.c (diskfs_get_directs): Use mmap instead of vm_allocate.
* hyper.c (allocate_mod_map): Likewise.
(get_hypermetadata): Likewise.
* pager.c (get_page_buf): Likewise.
* hyper.c (diskfs_readonly_changed): Use mprotect instead of
vm_protect.
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* dir.c (diskfs_lookup_hard): Use munmap instead of vm_deallocate.
(diskfs_direnter_hard): Likewise.
(diskfs_dirremove_hard): Likewise.
(diskfs_dirrewrite_hard): Likewise.
(diskfs_dirempty): Likewise.
(diskfs_drop_dirstat): Likewise.
(diskfs_get_directs): Likewise.
* hyper.c (allocate_mod_map): Likewise.
(get_hypermetadata): Likewise.
* pager.c (free_page_buf): Likewise.
* truncate.c (poke_pages): Likewise.
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* hyper.c (diskfs_readonly_changed): Adjust whether the store
should permit writes too.
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* ialloc.c (diskfs_alloc_node): Frob printf format to suppress warning.
* getblk.c (ext2_getblk): Likewise.
* balloc.c (ext2_free_blocks): Likewise.
* hyper.c (get_hypermetadata): Likewise.
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Use STORE->size.
(get_hypermetadata):
Use STORE->size & STORE->block_size.
<hurd/store.h>:
New include.
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Use EXT2_INODE_SIZE instead of sizeof (struct ext2_inode).
Deal with various version 2.x features.
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(diskfs_set_hypermetadata): Work correctly.
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Use ext2_warning to print warnings instead of error().
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(ext2fs_clean): New boolean variable.
(get_hypermetadata): Set it iff the clean bit is set on entry.
If not clean, complain and force read-only.
(diskfs_set_hypermetadata): Set clean bit only if ext2fs_clean is set.
(diskfs_readonly_changed): Complain if going writable and clean bit clear.
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* hyper.c (get_hypermetadata): Don't return any error value, just
panic if we can't read the superblock.
* ext2fs.c (main): Move warp_inode() inline. Make sure root inode
is really there. Don't check return value from get_hypermetadata.
(warp_inode): Function removed.
* ext2fs.h (get_hypermetadata): Returns void now.
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(zeroblock, modified_global_blocks): Define (were common).
(diskfs_readonly_changed): New function.
(get_hypermetadata):
Deallocate ZEROBLOCK if necessary. Use allocate_mod_map to allocate
MODIFIED_GLOBAL_BLOCKS.
Use diskfs device functions & variables instead of our own.
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initial function name argument (it's now supplied automagically).
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