[PATCH 6.8 019/172] btrfs: tests: allocate dummy fs_info and root in test_find_delalloc()

Greg Kroah-Hartman
2024-04-15T14:24:18Z

From: David Sterba <dsterba@suse.com>

commit b2136cc288fce2f24a92f3d656531b2d50ebec5a upstream.

Allocate fs_info and root to have a valid fs_info pointer in case it's
dereferenced by a helper outside of tests, like find_lock_delalloc_range().

Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/btrfs/tests/extent-io-tests.c | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)

--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -11,6 +11,7 @@
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../extent_io.h"
+#include "../disk-io.h"
#include "../btrfs_inode.h"

#define PROCESS_UNLOCK (1 << 0)
@@ -105,9 +106,11 @@ static void dump_extent_io_tree(const st
}
}

-static int test_find_delalloc(u32 sectorsize)
+static int test_find_delalloc(u32 sectorsize, u32 nodesize)
{
- struct inode *inode;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_root *root = NULL;
+ struct inode *inode = NULL;
struct extent_io_tree *tmp;
struct page *page;
struct page *locked_page = NULL;
@@ -121,12 +124,27 @@ static int test_find_delalloc(u32 sector

test_msg("running find delalloc tests");

+ fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
+ if (!fs_info) {
+ test_std_err(TEST_ALLOC_FS_INFO);
+ return -ENOMEM;
+ }
+
+ root = btrfs_alloc_dummy_root(fs_info);
+ if (IS_ERR(root)) {
+ test_std_err(TEST_ALLOC_ROOT);
+ ret = PTR_ERR(root);
+ goto out;
+ }
+
inode = btrfs_new_test_inode();
if (!inode) {
test_std_err(TEST_ALLOC_INODE);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
tmp = &BTRFS_I(inode)->io_tree;
+ BTRFS_I(inode)->root = root;

/*
* Passing NULL as we don't have fs_info but tracepoints are not used
@@ -316,6 +334,8 @@ out:
process_page_range(inode, 0, total_dirty - 1,
PROCESS_UNLOCK | PROCESS_RELEASE);
iput(inode);
+ btrfs_free_dummy_root(root);
+ btrfs_free_dummy_fs_info(fs_info);
return ret;
}

@@ -794,7 +814,7 @@ int btrfs_test_extent_io(u32 sectorsize,

test_msg("running extent I/O tests");

- ret = test_find_delalloc(sectorsize);
+ ret = test_find_delalloc(sectorsize, nodesize);
if (ret)
goto out;