Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Squashfs - a compressed read only filesystem for Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Phillip Lougher <phillip@squashfs.org.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * This file implements code to do filename lookup in directories.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * Like inodes, directories are packed into compressed metadata blocks, stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * in a directory table.  Directories are accessed using the start address of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * the metablock containing the directory and the offset into the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * decompressed block (<block, offset>).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * Directories are organised in a slightly complex way, and are not simply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * a list of file names.  The organisation takes advantage of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * fact that (in most cases) the inodes of the files will be in the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * compressed metadata block, and therefore, can share the start block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * Directories are therefore organised in a two level list, a directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * header containing the shared start block value, and a sequence of directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * entries, each of which share the shared start block.  A new directory header
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * is written once/if the inode start block changes.  The directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * header/directory entry list is repeated as many times as necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * Directories are sorted, and can contain a directory index to speed up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * file lookup.  Directory indexes store one entry per metablock, each entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * storing the index/filename mapping to the first directory header
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * in each metadata block.  Directories are sorted in alphabetical order,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  * and at lookup the index is scanned linearly looking for the first filename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * alphabetically larger than the filename being looked up.  At this point the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * location of the metadata block the filename is in has been found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * The general idea of the index is ensure only one metadata block needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  * decompressed to do a lookup irrespective of the length of the directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * This scheme has the advantage that it doesn't require extra memory overhead
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * and doesn't require much extra storage on disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #include <linux/dcache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #include "squashfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #include "squashfs_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #include "squashfs_fs_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #include "squashfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * Lookup name in the directory index, returning the location of the metadata
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * block containing it, and the directory index this represents.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * If we get an error reading the index then return the part of the index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  * (if any) we have managed to read - the index isn't essential, just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * quicker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static int get_dir_index_using_name(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			u64 *next_block, int *next_offset, u64 index_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 			int index_offset, int i_count, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct squashfs_sb_info *msblk = sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int i, length = 0, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct squashfs_dir_index *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	char *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	index = kmalloc(sizeof(*index) + SQUASHFS_NAME_LEN * 2 + 2, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (index == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		ERROR("Failed to allocate squashfs_dir_index\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	str = &index->name[SQUASHFS_NAME_LEN + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	strncpy(str, name, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	str[len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	for (i = 0; i < i_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		err = squashfs_read_metadata(sb, index, &index_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 					&index_offset, sizeof(*index));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		size = le32_to_cpu(index->size) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (size > SQUASHFS_NAME_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		err = squashfs_read_metadata(sb, index->name, &index_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 					&index_offset, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		index->name[size] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		if (strcmp(index->name, str) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		length = le32_to_cpu(index->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		*next_block = le32_to_cpu(index->start_block) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 					msblk->directory_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	*next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	kfree(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	 * Return index (f_pos) of the looked up metadata block.  Translate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	 * from internal f_pos to external f_pos which is offset by 3 because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	 * we invent "." and ".." entries which are not actually stored in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	 * directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	return length + 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 				 unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	const unsigned char *name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int len = dentry->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct inode *inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	struct squashfs_sb_info *msblk = dir->i_sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct squashfs_dir_header dirh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct squashfs_dir_entry *dire;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	u64 block = squashfs_i(dir)->start + msblk->directory_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	int offset = squashfs_i(dir)->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	int err, length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	unsigned int dir_count, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	TRACE("Entered squashfs_lookup [%llx:%x]\n", block, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	dire = kmalloc(sizeof(*dire) + SQUASHFS_NAME_LEN + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (dire == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		ERROR("Failed to allocate squashfs_dir_entry\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (len > SQUASHFS_NAME_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	length = get_dir_index_using_name(dir->i_sb, &block, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				squashfs_i(dir)->dir_idx_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				squashfs_i(dir)->dir_idx_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				squashfs_i(dir)->dir_idx_cnt, name, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	while (length < i_size_read(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		 * Read directory header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		err = squashfs_read_metadata(dir->i_sb, &dirh, &block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				&offset, sizeof(dirh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			goto read_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		length += sizeof(dirh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		dir_count = le32_to_cpu(dirh.count) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		if (dir_count > SQUASHFS_DIR_COUNT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			goto data_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		while (dir_count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			 * Read directory entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			err = squashfs_read_metadata(dir->i_sb, dire, &block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 					&offset, sizeof(*dire));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 				goto read_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			size = le16_to_cpu(dire->size) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			/* size should never be larger than SQUASHFS_NAME_LEN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			if (size > SQUASHFS_NAME_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 				goto data_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			err = squashfs_read_metadata(dir->i_sb, dire->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 					&block, &offset, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 				goto read_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			length += sizeof(*dire) + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			if (name[0] < dire->name[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 				goto exit_lookup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			if (len == size && !strncmp(name, dire->name, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				unsigned int blk, off, ino_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 				long long ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 				blk = le32_to_cpu(dirh.start_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 				off = le16_to_cpu(dire->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 				ino_num = le32_to_cpu(dirh.inode_number) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 					(short) le16_to_cpu(dire->inode_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				ino = SQUASHFS_MKINODE(blk, off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				TRACE("calling squashfs_iget for directory "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 					"entry %s, inode  %x:%x, %d\n", name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 					blk, off, ino_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				inode = squashfs_iget(dir->i_sb, ino, ino_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 				goto exit_lookup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) exit_lookup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	kfree(dire);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) data_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) read_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	ERROR("Unable to read directory block [%llx:%x]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		squashfs_i(dir)->start + msblk->directory_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		squashfs_i(dir)->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	kfree(dire);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) const struct inode_operations squashfs_dir_inode_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	.lookup = squashfs_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	.listxattr = squashfs_listxattr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) };