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Ext2FS: Don't allow creating new files in removed directories

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Also don't uncache inodes when they reach i_links_count==0 unless they
also have no ref counts other than the +1 from the inode cache.
This prevents the FS from deleting the on-disk inode too soon.
This commit is contained in:
Andreas Kling 2020-01-15 21:58:03 +01:00
parent 0fa38e4a4a
commit 9e54c7c17f
Notes: sideshowbarker 2024-07-19 10:02:36 +09:00
2 changed files with 29 additions and 1 deletions
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22
Userland/test_io.cpp
View file

@ -3,6 +3,7 @@
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#define EXPECT_ERROR_2(err, syscall, arg1, arg2) \
@ -208,6 +209,26 @@ void test_eoverflow()
close(fd);
}
void test_rmdir_while_inside_dir()
{
int rc = mkdir("/home/anon/testdir", 0700);
ASSERT(rc == 0);
rc = chdir("/home/anon/testdir");
ASSERT(rc == 0);
rc = rmdir("/home/anon/testdir");
ASSERT(rc == 0);
int fd = open("x", O_CREAT | O_RDWR, 0600);
if (fd >= 0 || errno != ENOENT) {
fprintf(stderr, "Expected ENOENT when trying to create a file inside a deleted directory. Got %d with errno=%d\n", fd, errno);
}
rc = chdir("/home/anon");
ASSERT(rc == 0);
}
int main(int, char**)
{
int rc;
@ -232,6 +253,7 @@ int main(int, char**)
test_open_create_device();
test_unlink_symlink();
test_eoverflow();
test_rmdir_while_inside_dir();
return 0;
}