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In ext2 data are stored in little endian to ensure portability. So
enforce little endian when manipulating these bytes.
Message-Id: <20220123041715.19402-8-etienne.brateau@gmail.com>
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Our variants print stack traces on failures. This will make locating
errors much easier.
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Use `diskfs_make_node_alloc' to allocate both the node and the
disknode in a continuous chunk of memory. This increases locality and
reduces the pressure on the memory allocator.
* ext2fs/inode.c: Use `diskfs_node_disknode' to access the disknode.
(diskfs_cached_lookup): Use `diskfs_make_node_alloc' to allocate the
node.
(diskfs_node_norefs): Only free `np'.
* ext2fs/dir.c: Use `diskfs_node_disknode' to access the disknode.
* ext2fs/ext2fs.h: Likewise.
* ext2fs/getblk.c: Likewise.
* ext2fs/ialloc.c: Likewise.
* ext2fs/pager.c: Likewise.
* ext2fs/truncate.c: Likewise.
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For reference, this patch was created using the following semantic
patch, and then manually applying the change in all functions
containing nested functions, as those are not supported by Coccinelle.
@@
expression A, B;
@@
- bzero (A, B)
+ memset (A, 0, B)
* auth/auth.c: Replace `bzero' with `memset'.
* boot/boot.c: Likewise.
* defpager/defpager.c: Likewise.
* exec/exec.c: Likewise. Also, drop `safe_bzero' and just use
`hurd_safe_memset' directly.
* ext2fs/ext2fs.c: Likewise.
* ext2fs/getblk.c: Likewise.
* ext2fs/pager.c: Likewise.
* fatfs/pager.c: Likewise.
* ftpfs/dir.c: Likewise.
* ftpfs/netfs.c: Likewise.
* isofs/inode.c: Likewise.
* isofs/pager.c: Likewise.
* libdiskfs/file-getfh.c: Likewise.
* libdiskfs/file-statfs.c: Likewise.
* libfshelp/fetch-root.c: Likewise.
* libfshelp/start-translator.c: Likewise.
* libftpconn/create.c: Likewise.
* libftpconn/open.c: Likewise.
* libftpconn/unix.c: Likewise.
* libpipe/pipe.c: Likewise.
* libps/procstat.c: Likewise.
* libps/spec.c: Likewise.
* libshouldbeinlibc/cacheq.c: Likewise.
* libshouldbeinlibc/idvec.c: Likewise.
* libshouldbeinlibc/ugids.c: Likewise.
* libstore/argp.c: Likewise.
* libstore/enc.c: Likewise.
* libstore/kids.c: Likewise.
* libthreads/alpha/thread.c: Likewise.
* libtreefs/fsys.c: Likewise.
* libtrivfs/file-statfs.c: Likewise.
* mach-defpager/default_pager.c: Likewise.
* pfinet/glue-include/asm/uaccess.h: Likewise.
* pfinet/io-ops.c: Likewise.
* pfinet/options.c: Likewise.
* pfinet/socket.c: Likewise.
* pfinet/timer-emul.c: Likewise.
* pflocal/io.c: Likewise.
* startup/startup.c: Likewise.
* storeio/storeio.c: Likewise.
* sutils/fstab.c: Likewise.
* usermux/usermux.c: Likewise.
* utils/fakeauth.c: Likewise.
* utils/frobauth.c: Likewise.
* utils/login.c: Likewise.
* utils/x.c: Likewise.
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This is a revised version of the large store patch for ext2fs, written
by Ognyan Kulev. It provides support for stores larger than 2 GiB.
* ext2fs/balloc.c: Use the new disk_cache_block_ref and disk_cache_block_deref
functions to access blocks from the disk cache.
* ext2fs/ext2fs.c (main): Update initialization call to pokel_init, and
call map_hypermetadata instead of get_hypermetadata.
* ext2fs/ext2fs.h: Include <hurd/store.h> and <hurd/ihash.h>.
(DISK_CACHE_BLOCKS): New macro.
(DC_INCORE): Likewise.
(DC_UNTOUCHED): Likewise.
(DC_FIXED): Likewise.
(DC_DONT_REUSE): Likewise.
(DC_NO_BLOCK): Likewise.
(DISK_CACHE_LAST_READ_XOR) [!NDEBUG]: Likewise.
(struct disk_cache_info): New structure.
(disk_cache): New external variable.
(disk_cache_size): Likewise.
(disk_cache_blocks): Likewise.
(disk_cache_bptr): Likewise.
(disk_cache_info): Likewise.
(disk_cache_lock): Likewise.
(disk_cache_reassociation): Likewise.
(disk_cache_block_ref): New declaration.
(disk_cache_block_ref_ptr): Likewise.
(disk_cache_block_deref): Likewise.
(disk_cache_block_is_ref): Likewise.
(map_hypermetadata): Likewise.
(trunc_block): Cast to off_t.
(round_block): Likewise.
(boffs): Likewise.
(bptr_index): New macro.
(boffs_ptr): Rewrite as an inline function to make it look up a block from
the disk cache.
(bptr_offs): Likewise.
(dino): Remove function, replaced with ...
(dino_ref): ... this one, which adds a reference to the inode block.
(dino_deref): New inline function.
(record_global_poke): Make sure block is referenced.
(record_indir_poke): Likewise.
(sync_global_ptr): Remove block reference, and adjust call to
pager_sync_some.
(sync_global): Add debug call to print wait parameter.
* ext2fs/getblk.c: Use the new disk_cache_block_ref and disk_cache_block_deref
functions to access blocks from the disk cache.
* ext2fs/hyper.c (get_hypermetadata): Read the superblock from the store
now that it's not directly mapped in memory. Move the initialization of
zeroblock here from ...
(map_hypermetadata): ... here. Also, set the superblock pointer.
(diskfs_set_hypermetadata): Add a reference to the superblock.
(diskfs_readonly_changed): Update call to mprotect.
* ext2fs/ialloc.c: Use the new disk_cache_block_ref, disk_cache_block_ref_ptr
and disk_cache_block_deref functions to access blocks from the disk cache.
* ext2fs/inode.c: Update calls that used the disk image to use the disk cache,
and use the new reference handling functions where appropriate.
* ext2fs/pager.c: Include <unistd.h> and "../libpager/priv.h".
(disk_image): Remove global variable.
(disk_pager_read_page): Update cache information.
(disk_pager_write_page): Likewise.
(disk_pager_notify_evict): New function.
(pager_notify_evict): Call disk_pager_notify_evict appropriately.
(disk_cache): New global variable.
(disk_cache_size): Likewise.
(disk_cache_blocks): Likewise.
(disk_cache_bptr): Likewise.
(disk_cache_info): Likewise.
(disk_cache_hint): Likewise.
(disk_cache_lock): Likewise.
(disk_cache_reassociation): Likewise.
(disk_cache_init): New function.
(disk_cache_return_unused): Likewise.
(disk_cache_block_ref): Likewise.
(disk_cache_block_ref_ptr): Likewise.
(disk_cache_block_deref): Likewise.
(disk_cache_block_is_ref): Likewise.
(create_disk_pager): Update initialization of the disk pager.
* ext2fs/pokel.c (pokel_add): Drop block references with disk_cache_block_deref.
(_pokel_exec): Likewise.
* ext2fs/truncate.c (trunc_indirect): Use the new disk_cache_block_ref and
disk_cache_block_deref functions to access blocks from the disk cache.
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* ext2fs.h (ext2_getblk): Fix typo in comment.
* getblk.c (ext2_getblk): Likewise.
* dir.c (diskfs_get_directs): Likewise.
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* balloc.c (ext2_free_blocks, ext2_new_block): Fix formats to avoid
-Wformat warnings.
* getblk.c (ext2_alloc_block, inode_getblk, ext2_getblk): Likewise.
* ialloc.c (ext2_count_free_inodes): Likewise.
* truncate.c (trunc_direct): Likewise.
* pager.c (pending_blocks_write, diskfs_grow): Likewise.
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* balloc.c (ext2_new_block): Take new arg PREALLOC_GOAL.
Use that instead of hard-coded 8 as maximum of blocks to preallocate.
Also test that instead of PREALLOC_COUNT to decide whether to
try any preallocation at all.
* getblk.c (ext2_alloc_block): Pass new arg to ext2_new_block.
Use EXT2_DEFAULT_PREALLOC_BLOCKS as default (replaces hard-coded 8);
For a regular file, use SBLOCK->s_prealloc_blocks before default.
For a directory, use SBLOCK->s_dir_prealloc_blocks if the
EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is set, otherwise zero.
* inode.c (diskfs_set_translator): Pass new arg (zero).
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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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references to the CACHE_ID field in the node.
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initial function name argument (it's now supplied automagically).
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allocate a new block.
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