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-rw-r--r--exfat/libexfat/mount.c75
1 files changed, 23 insertions, 52 deletions
diff --git a/exfat/libexfat/mount.c b/exfat/libexfat/mount.c
index 027f8b0e0..928c561dc 100644
--- a/exfat/libexfat/mount.c
+++ b/exfat/libexfat/mount.c
@@ -3,7 +3,7 @@
exFAT file system implementation library.
Free exFAT implementation.
- Copyright (C) 2010-2014 Andrew Nayenko
+ Copyright (C) 2010-2013 Andrew Nayenko
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -24,7 +24,6 @@
#include <string.h>
#include <stdlib.h>
#include <errno.h>
-#include <inttypes.h>
#include <unistd.h>
#include <sys/types.h>
@@ -40,12 +39,6 @@ static uint64_t rootdir_size(const struct exfat* ef)
to indicate this */
rootdir_cluster = exfat_next_cluster(ef, ef->root, rootdir_cluster);
}
- if (rootdir_cluster != EXFAT_CLUSTER_END)
- {
- exfat_error("bad cluster %#x while reading root directory",
- rootdir_cluster);
- return 0;
- }
return clusters * CLUSTER_SIZE(*ef->sb);
}
@@ -98,7 +91,7 @@ static void parse_options(struct exfat* ef, const char* options)
ef->noatime = match_option(options, "noatime");
}
-static bool verify_vbr_checksum(struct exfat_dev* dev, void* sector,
+static int verify_vbr_checksum(struct exfat_dev* dev, void* sector,
off64_t sector_size)
{
uint32_t vbr_checksum;
@@ -107,7 +100,7 @@ static bool verify_vbr_checksum(struct exfat_dev* dev, void* sector,
if (exfat_pread(dev, sector, sector_size, 0) < 0)
{
exfat_error("failed to read boot sector");
- return false;
+ return 1;
}
vbr_checksum = exfat_vbr_start_checksum(sector, sector_size);
for (i = 1; i < 11; i++)
@@ -115,7 +108,7 @@ static bool verify_vbr_checksum(struct exfat_dev* dev, void* sector,
if (exfat_pread(dev, sector, sector_size, i * sector_size) < 0)
{
exfat_error("failed to read VBR sector");
- return false;
+ return 1;
}
vbr_checksum = exfat_vbr_add_checksum(sector, sector_size,
vbr_checksum);
@@ -123,16 +116,16 @@ static bool verify_vbr_checksum(struct exfat_dev* dev, void* sector,
if (exfat_pread(dev, sector, sector_size, i * sector_size) < 0)
{
exfat_error("failed to read VBR checksum sector");
- return false;
+ return 1;
}
for (i = 0; i < sector_size / sizeof(vbr_checksum); i++)
if (le32_to_cpu(((const le32_t*) sector)[i]) != vbr_checksum)
{
exfat_error("invalid VBR checksum 0x%x (expected 0x%x)",
le32_to_cpu(((const le32_t*) sector)[i]), vbr_checksum);
- return false;
+ return 1;
}
- return true;
+ return 0;
}
static int commit_super_block(const struct exfat* ef)
@@ -208,26 +201,8 @@ int exfat_mount(struct exfat* ef, const char* spec, const char* options)
exfat_error("exFAT file system is not found");
return -EIO;
}
- ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb));
- if (ef->zero_cluster == NULL)
- {
- exfat_close(ef->dev);
- free(ef->sb);
- exfat_error("failed to allocate zero sector");
- return -ENOMEM;
- }
- /* use zero_cluster as a temporary buffer for VBR checksum verification */
- if (!verify_vbr_checksum(ef->dev, ef->zero_cluster, SECTOR_SIZE(*ef->sb)))
- {
- free(ef->zero_cluster);
- exfat_close(ef->dev);
- free(ef->sb);
- return -EIO;
- }
- memset(ef->zero_cluster, 0, CLUSTER_SIZE(*ef->sb));
if (ef->sb->version.major != 1 || ef->sb->version.minor != 0)
{
- free(ef->zero_cluster);
exfat_close(ef->dev);
exfat_error("unsupported exFAT version: %hhu.%hhu",
ef->sb->version.major, ef->sb->version.minor);
@@ -236,34 +211,39 @@ int exfat_mount(struct exfat* ef, const char* spec, const char* options)
}
if (ef->sb->fat_count != 1)
{
- free(ef->zero_cluster);
exfat_close(ef->dev);
- exfat_error("unsupported FAT count: %hhu", ef->sb->fat_count);
free(ef->sb);
+ exfat_error("unsupported FAT count: %hhu", ef->sb->fat_count);
return -EIO;
}
/* officially exFAT supports cluster size up to 32 MB */
if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25)
{
- free(ef->zero_cluster);
exfat_close(ef->dev);
+ free(ef->sb);
exfat_error("too big cluster size: 2^%d",
(int) ef->sb->sector_bits + (int) ef->sb->spc_bits);
- free(ef->sb);
return -EIO;
}
- if (le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb) >
- exfat_get_size(ef->dev))
+
+ ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb));
+ if (ef->zero_cluster == NULL)
+ {
+ exfat_close(ef->dev);
+ free(ef->sb);
+ exfat_error("failed to allocate zero sector");
+ return -ENOMEM;
+ }
+ /* use zero_cluster as a temporary buffer for VBR checksum verification */
+ if (verify_vbr_checksum(ef->dev, ef->zero_cluster,
+ SECTOR_SIZE(*ef->sb)) != 0)
{
free(ef->zero_cluster);
- exfat_error("file system is larger than underlying device: "
- "%"PRIu64" > %"PRIu64,
- le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb),
- exfat_get_size(ef->dev));
exfat_close(ef->dev);
free(ef->sb);
return -EIO;
}
+ memset(ef->zero_cluster, 0, CLUSTER_SIZE(*ef->sb));
ef->root = malloc(sizeof(struct exfat_node));
if (ef->root == NULL)
@@ -280,14 +260,6 @@ int exfat_mount(struct exfat* ef, const char* spec, const char* options)
ef->root->fptr_cluster = ef->root->start_cluster;
ef->root->name[0] = cpu_to_le16('\0');
ef->root->size = rootdir_size(ef);
- if (ef->root->size == 0)
- {
- free(ef->root);
- free(ef->zero_cluster);
- exfat_close(ef->dev);
- free(ef->sb);
- return -EIO;
- }
/* exFAT does not have time attributes for the root directory */
ef->root->mtime = 0;
ef->root->atime = 0;
@@ -342,12 +314,11 @@ static void finalize_super_block(struct exfat* ef)
ef->sb->allocated_percent = ((total - free) * 100 + total / 2) / total;
}
- commit_super_block(ef); /* ignore return code */
+ commit_super_block(ef);
}
void exfat_unmount(struct exfat* ef)
{
- exfat_flush(ef); /* ignore return code */
exfat_put_node(ef, ef->root);
exfat_reset_cache(ef);
free(ef->root);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 15:32:36 +0100