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ext2_acl.c
(12.67 KB)
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ext2_acl.h
(1.92 KB)
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ext2_alloc.c
(40.54 KB)
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ext2_balloc.c
(8.32 KB)
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ext2_bmap.c
(13.4 KB)
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ext2_csum.c
(21.91 KB)
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ext2_dinode.h
(6.04 KB)
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ext2_dir.h
(3.78 KB)
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ext2_extattr.c
(30.38 KB)
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ext2_extattr.h
(4.76 KB)
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ext2_extents.c
(35.13 KB)
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ext2_extents.h
(4.67 KB)
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ext2_extern.h
(7.18 KB)
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ext2_hash.c
(8.4 KB)
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ext2_htree.c
(26.01 KB)
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ext2_inode.c
(17.06 KB)
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ext2_inode_cnv.c
(8.96 KB)
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ext2_lookup.c
(37.44 KB)
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ext2_mount.h
(2.92 KB)
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ext2_subr.c
(5.11 KB)
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ext2_vfsops.c
(39.42 KB)
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ext2_vnops.c
(57.33 KB)
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ext2fs.h
(17.5 KB)
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fs.h
(5.97 KB)
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htree.h
(3.14 KB)
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inode.h
(7.25 KB)
Editing: ext2_extents.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2012, 2010 Zheng Liu <lz@freebsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _FS_EXT2FS_EXT2_EXTENTS_H_ #define _FS_EXT2FS_EXT2_EXTENTS_H_ #include <sys/types.h> #define EXT4_EXT_MAGIC 0xf30a #define EXT4_MAX_BLOCKS 0xffffffff #define EXT_INIT_MAX_LEN (1UL << 15) #define EXT4_MAX_LEN (EXT_INIT_MAX_LEN - 1) #define EXT4_EXT_DEPTH_MAX 5 #define EXT4_EXT_CACHE_NO 0 #define EXT4_EXT_CACHE_GAP 1 #define EXT4_EXT_CACHE_IN 2 /* * Ext4 extent tail with csum */ struct ext4_extent_tail { uint32_t et_checksum; /* crc32c(uuid+inum+extent_block) */ }; /* * Ext4 file system extent on disk. */ struct ext4_extent { uint32_t e_blk; /* first logical block */ uint16_t e_len; /* number of blocks */ uint16_t e_start_hi; /* high 16 bits of physical block */ uint32_t e_start_lo; /* low 32 bits of physical block */ }; /* * Extent index on disk. */ struct ext4_extent_index { uint32_t ei_blk; /* indexes logical blocks */ uint32_t ei_leaf_lo; /* points to physical block of the * next level */ uint16_t ei_leaf_hi; /* high 16 bits of physical block */ uint16_t ei_unused; }; /* * Extent tree header. */ struct ext4_extent_header { uint16_t eh_magic; /* magic number: 0xf30a */ uint16_t eh_ecount; /* number of valid entries */ uint16_t eh_max; /* capacity of store in entries */ uint16_t eh_depth; /* the depth of extent tree */ uint32_t eh_gen; /* generation of extent tree */ }; /* * Save cached extent. */ struct ext4_extent_cache { daddr_t ec_start; /* extent start */ uint32_t ec_blk; /* logical block */ uint32_t ec_len; uint32_t ec_type; }; /* * Save path to some extent. */ struct ext4_extent_path { int index_count; uint16_t ep_depth; uint64_t ep_blk; char *ep_data; struct ext4_extent *ep_ext; struct ext4_extent_index *ep_index; struct ext4_extent_header *ep_header; }; #define EXT_FIRST_EXTENT(hdr) ((struct ext4_extent *)(((char *)(hdr)) + \ sizeof(struct ext4_extent_header))) #define EXT_FIRST_INDEX(hdr) ((struct ext4_extent_index *)(((char *)(hdr)) + \ sizeof(struct ext4_extent_header))) #define EXT_LAST_EXTENT(hdr) (EXT_FIRST_EXTENT((hdr)) + le16toh((hdr)->eh_ecount) - 1) #define EXT_LAST_INDEX(hdr) (EXT_FIRST_INDEX((hdr)) + le16toh((hdr)->eh_ecount) - 1) #define EXT4_EXTENT_TAIL_OFFSET(hdr) (sizeof(struct ext4_extent_header) + \ (sizeof(struct ext4_extent) * le16toh((hdr)->eh_max))) #define EXT_HAS_FREE_INDEX(path) \ (le16toh((path)->ep_header->eh_ecount) < le16toh((path)->ep_header->eh_max)) #define EXT_MAX_EXTENT(hdr) (EXT_FIRST_EXTENT(hdr) + le16toh((hdr)->eh_max) - 1) #define EXT_MAX_INDEX(hdr) (EXT_FIRST_INDEX((hdr)) + le16toh((hdr)->eh_max) - 1) struct inode; struct m_ext2fs; void ext4_ext_tree_init(struct inode *ip); int ext4_ext_in_cache(struct inode *, daddr_t, struct ext4_extent *); void ext4_ext_put_cache(struct inode *, struct ext4_extent *, int); int ext4_ext_find_extent(struct inode *, daddr_t, struct ext4_extent_path **); void ext4_ext_path_free(struct ext4_extent_path *path); int ext4_ext_remove_space(struct inode *ip, off_t length, int flags, struct ucred *cred, struct thread *td); int ext4_ext_get_blocks(struct inode *ip, int64_t iblock, unsigned long max_blocks, struct ucred *cred, struct buf **bpp, int *allocate, daddr_t *); #ifdef EXT2FS_PRINT_EXTENTS void ext4_ext_print_extent_tree_status(struct inode *ip); #endif #endif /* !_FS_EXT2FS_EXT2_EXTENTS_H_ */
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