Merge tag 'f2fs-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've added some knobs to enhance compression feature
  and harden testing environment. In addition, we've fixed several bugs
  reported from Android devices such as long discarding latency, device
  hanging during quota_sync, etc.

  Enhancements:
   - support lzo-rle algorithm
   - add two ioctls to release and reserve blocks for compression
   - support partial truncation/fiemap on compressed file
   - introduce sysfs entries to attach IO flags explicitly
   - add iostat trace point along with read io stat

  Bug fixes:
   - fix long discard latency
   - flush quota data by f2fs_quota_sync correctly
   - fix to recover parent inode number for power-cut recovery
   - fix lz4/zstd output buffer budget
   - parse checkpoint mount option correctly
   - avoid inifinite loop to wait for flushing node/meta pages
   - manage discard space correctly

  And some refactoring and clean up patches were added"

* tag 'f2fs-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (51 commits)
  f2fs: attach IO flags to the missing cases
  f2fs: add node_io_flag for bio flags likewise data_io_flag
  f2fs: remove unused parameter of f2fs_put_rpages_mapping()
  f2fs: handle readonly filesystem in f2fs_ioc_shutdown()
  f2fs: avoid utf8_strncasecmp() with unstable name
  f2fs: don't return vmalloc() memory from f2fs_kmalloc()
  f2fs: fix retry logic in f2fs_write_cache_pages()
  f2fs: fix wrong discard space
  f2fs: compress: don't compress any datas after cp stop
  f2fs: remove unneeded return value of __insert_discard_tree()
  f2fs: fix wrong value of tracepoint parameter
  f2fs: protect new segment allocation in expand_inode_data
  f2fs: code cleanup by removing ifdef macro surrounding
  f2fs: avoid inifinite loop to wait for flushing node pages at cp_error
  f2fs: flush dirty meta pages when flushing them
  f2fs: fix checkpoint=disable:%u%%
  f2fs: compress: fix zstd data corruption
  f2fs: add compressed/gc data read IO stat
  f2fs: fix potential use-after-free issue
  f2fs: compress: don't handle non-compressed data in workqueue
  ...

1 files changed, 41 insertions, 10 deletions

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index dd804c07eeb0..ae5310f02e7f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -107,13 +107,51 @@ static void del_fsync_inode(struct fsync_inode_entry *entry, int drop)
 	kmem_cache_free(fsync_entry_slab, entry);
 }
 
+static int init_recovered_filename(const struct inode *dir,
+				   struct f2fs_inode *raw_inode,
+				   struct f2fs_filename *fname,
+				   struct qstr *usr_fname)
+{
+	int err;
+
+	memset(fname, 0, sizeof(*fname));
+	fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen);
+	fname->disk_name.name = raw_inode->i_name;
+
+	if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN))
+		return -ENAMETOOLONG;
+
+	if (!IS_ENCRYPTED(dir)) {
+		usr_fname->name = fname->disk_name.name;
+		usr_fname->len = fname->disk_name.len;
+		fname->usr_fname = usr_fname;
+	}
+
+	/* Compute the hash of the filename */
+	if (IS_CASEFOLDED(dir)) {
+		err = f2fs_init_casefolded_name(dir, fname);
+		if (err)
+			return err;
+		f2fs_hash_filename(dir, fname);
+#ifdef CONFIG_UNICODE
+		/* Case-sensitive match is fine for recovery */
+		kfree(fname->cf_name.name);
+		fname->cf_name.name = NULL;
+#endif
+	} else {
+		f2fs_hash_filename(dir, fname);
+	}
+	return 0;
+}
+
 static int recover_dentry(struct inode *inode, struct page *ipage,
 						struct list_head *dir_list)
 {
 	struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
 	nid_t pino = le32_to_cpu(raw_inode->i_pino);
 	struct f2fs_dir_entry *de;
-	struct fscrypt_name fname;
+	struct f2fs_filename fname;
+	struct qstr usr_fname;
 	struct page *page;
 	struct inode *dir, *einode;
 	struct fsync_inode_entry *entry;
@@ -132,16 +170,9 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 	}
 
 	dir = entry->inode;
-
-	memset(&fname, 0, sizeof(struct fscrypt_name));
-	fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
-	fname.disk_name.name = raw_inode->i_name;
-
-	if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
-		WARN_ON(1);
-		err = -ENAMETOOLONG;
+	err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname);
+	if (err)
 		goto out;
-	}
 retry:
 	de = __f2fs_find_entry(dir, &fname, &page);
 	if (de && inode->i_ino == le32_to_cpu(de->ino))