fs/smb/client/readdir.c

Source file repositories/reference/linux-study-clean/fs/smb/client/readdir.c

File Facts

System
Linux kernel
Corpus path
fs/smb/client/readdir.c
Extension
.c
Size
34172 bytes
Lines
1229
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cifs_dirent {
	const char	*name;
	size_t		namelen;
	u32		resume_key;
	u64		ino;
};

static void cifs_fill_dirent_posix(struct cifs_dirent *de,
				   const struct smb2_posix_info *info)
{
	struct smb2_posix_info_parsed parsed;

	/* payload should have already been checked at this point */
	if (posix_info_parse(info, NULL, &parsed) < 0) {
		cifs_dbg(VFS, "Invalid POSIX info payload\n");
		return;
	}

	de->name = parsed.name;
	de->namelen = parsed.name_len;
	de->resume_key = info->Ignored;
	de->ino = le64_to_cpu(info->Inode);
}

static void cifs_fill_dirent_unix(struct cifs_dirent *de,
		const FILE_UNIX_INFO *info, bool is_unicode)
{
	de->name = &info->FileName[0];
	if (is_unicode)
		de->namelen = cifs_unicode_bytelen(de->name);
	else
		de->namelen = strnlen(de->name, PATH_MAX);
	de->resume_key = info->ResumeKey;
	de->ino = le64_to_cpu(info->basic.UniqueId);
}

static void cifs_fill_dirent_dir(struct cifs_dirent *de,
		const FILE_DIRECTORY_INFO *info)
{
	de->name = &info->FileName[0];
	de->namelen = le32_to_cpu(info->FileNameLength);
	de->resume_key = info->FileIndex;
}

static void cifs_fill_dirent_full(struct cifs_dirent *de,
		const FILE_FULL_DIRECTORY_INFO *info)
{
	de->name = &info->FileName[0];
	de->namelen = le32_to_cpu(info->FileNameLength);
	de->resume_key = info->FileIndex;
}

static void cifs_fill_dirent_search(struct cifs_dirent *de,
		const FILE_ID_FULL_DIR_INFO *info)
{
	de->name = &info->FileName[0];
	de->namelen = le32_to_cpu(info->FileNameLength);
	de->resume_key = info->FileIndex;
	de->ino = le64_to_cpu(info->UniqueId);
}

static void cifs_fill_dirent_both(struct cifs_dirent *de,
		const FILE_BOTH_DIRECTORY_INFO *info)
{
	de->name = &info->FileName[0];
	de->namelen = le32_to_cpu(info->FileNameLength);
	de->resume_key = info->FileIndex;
}

static void cifs_fill_dirent_std(struct cifs_dirent *de,
		const FIND_FILE_STANDARD_INFO *info)
{
	de->name = &info->FileName[0];
	/* one byte length, no endianness conversion */
	de->namelen = info->FileNameLength;
	de->resume_key = info->ResumeKey;
}

static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
		u16 level, bool is_unicode)
{
	memset(de, 0, sizeof(*de));

	switch (level) {
	case SMB_FIND_FILE_POSIX_INFO:
		cifs_fill_dirent_posix(de, info);
		break;
	case SMB_FIND_FILE_UNIX:
		cifs_fill_dirent_unix(de, info, is_unicode);
		break;

Annotation

Implementation Notes