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ext2: Do not panic on feature checks when testing signature

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This commit is contained in:
mintsuki 2022-01-09 21:04:46 +01:00
parent 19bd781661
commit ff63edc71d
1 changed files with 13 additions and 14 deletions
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27
stage23/fs/ext2.s2.c
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@ -318,8 +318,19 @@ bool ext2_open(struct ext2_file_handle *ret, struct volume *part, const char *pa
struct ext2_superblock *sb = &ret->sb;
if (sb->s_state == EXT2_FS_UNRECOVERABLE_ERRORS)
panic(false, "ext2: unrecoverable errors found");
if (sb->s_rev_level != 0 &&
(sb->s_feature_incompat & EXT2_IF_COMPRESSION ||
sb->s_feature_incompat & EXT2_IF_INLINE_DATA ||
sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG ||
sb->s_feature_incompat & EXT2_IF_ENCRYPT)) {
print("ext2: filesystem has unsupported features %x\n", sb->s_feature_incompat);
return false;
}
if (sb->s_state == EXT2_FS_UNRECOVERABLE_ERRORS) {
print("ext2: unrecoverable errors found\n");
return false;
}
ret->block_size = ((uint64_t)1024 << ret->sb.s_log_block_size);
@ -449,8 +460,6 @@ static int inode_read(void *buf, uint64_t loc, uint64_t count,
return 0;
}
// attempts to initialize the ext2 filesystem
// and checks if all features are supported
int ext2_check_signature(struct volume *part) {
struct ext2_superblock sb;
volume_read(part, &sb, 1024, sizeof(struct ext2_superblock));
@ -458,16 +467,6 @@ int ext2_check_signature(struct volume *part) {
if (sb.s_magic != EXT2_S_MAGIC)
return 0;
// If the revision level is 0, we can't test for features.
if (sb.s_rev_level == 0)
return 1;
if (sb.s_feature_incompat & EXT2_IF_COMPRESSION ||
sb.s_feature_incompat & EXT2_IF_INLINE_DATA ||
sb.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG ||
sb.s_feature_incompat & EXT2_IF_ENCRYPT)
panic(false, "EXT2: filesystem has unsupported features %x", sb.s_feature_incompat);
return 1;
}