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Commit f16d59b4 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Steve French
Browse files

cifs: use cifs_dirent to replace cifs_get_name_from_search_buf 



This allows us to parse the on the wire structures only once in
cifs_filldir.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent cda0ec6a

fs/cifs/readdir.c

+23 −86
Original line number Diff line number Diff line
@@ -656,82 +656,6 @@ static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon, 
	return rc;

}



/* inode num, inode type and filename returned */

static int cifs_get_name_from_search_buf(struct qstr *pqst,

	char *current_entry, __u16 level, unsigned int unicode,

	struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)

{

	int rc = 0;

	unsigned int len = 0;

	char *filename;

	struct nls_table *nlt = cifs_sb->local_nls;



	*pinum = 0;



	if (level == SMB_FIND_FILE_UNIX) {

		FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;



		filename = &pFindData->FileName[0];

		if (unicode) {

			len = cifs_unicode_bytelen(filename);

		} else {

			/* BB should we make this strnlen of PATH_MAX? */

			len = strnlen(filename, PATH_MAX);

		}



		*pinum = le64_to_cpu(pFindData->basic.UniqueId);

	} else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {

		FILE_DIRECTORY_INFO *pFindData =

			(FILE_DIRECTORY_INFO *)current_entry;

		filename = &pFindData->FileName[0];

		len = le32_to_cpu(pFindData->FileNameLength);

	} else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {

		FILE_FULL_DIRECTORY_INFO *pFindData =

			(FILE_FULL_DIRECTORY_INFO *)current_entry;

		filename = &pFindData->FileName[0];

		len = le32_to_cpu(pFindData->FileNameLength);

	} else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {

		SEARCH_ID_FULL_DIR_INFO *pFindData =

			(SEARCH_ID_FULL_DIR_INFO *)current_entry;

		filename = &pFindData->FileName[0];

		len = le32_to_cpu(pFindData->FileNameLength);

		*pinum = le64_to_cpu(pFindData->UniqueId);

	} else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {

		FILE_BOTH_DIRECTORY_INFO *pFindData =

			(FILE_BOTH_DIRECTORY_INFO *)current_entry;

		filename = &pFindData->FileName[0];

		len = le32_to_cpu(pFindData->FileNameLength);

	} else if (level == SMB_FIND_FILE_INFO_STANDARD) {

		FIND_FILE_STANDARD_INFO *pFindData =

			(FIND_FILE_STANDARD_INFO *)current_entry;

		filename = &pFindData->FileName[0];

		/* one byte length, no name conversion */

		len = (unsigned int)pFindData->FileNameLength;

	} else {

		cFYI(1, "Unknown findfirst level %d", level);

		return -EINVAL;

	}



	if (len > max_len) {

		cERROR(1, "bad search response length %d past smb end", len);

		return -EINVAL;

	}



	if (unicode) {

		pqst->len = cifs_from_ucs2((char *) pqst->name,

					   (__le16 *) filename,

					   UNICODE_NAME_MAX,

					   min(len, max_len), nlt,

					   cifs_sb->mnt_cifs_flags &

						CIFS_MOUNT_MAP_SPECIAL_CHR);

		pqst->len -= nls_nullsize(nlt);

	} else {

		pqst->name = filename;

		pqst->len = len;

	}

	return rc;

}



static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,

		void *dirent, char *scratch_buf, unsigned int max_len)

{
@@ -743,7 +667,6 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, 
	struct dentry *dentry;

	struct qstr name;

	int rc = 0;

	u64 inum;

	ino_t ino;



	rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
@@ -751,17 +674,31 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, 
	if (rc)

		return rc;



	if (de.namelen > max_len) {

		cERROR(1, "bad search response length %zd past smb end",

			  de.namelen);

		return -EINVAL;

	}



	/* skip . and .. since we added them first */

	if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))

		return 0;



	if (file_info->srch_inf.unicode) {

		struct nls_table *nlt = cifs_sb->local_nls;



		name.name = scratch_buf;

	rc = cifs_get_name_from_search_buf(&name, find_entry,

					   file_info->srch_inf.info_level,

					   file_info->srch_inf.unicode,

					   cifs_sb, max_len, &inum);

	if (rc)

		return rc;

		name.len =

			cifs_from_ucs2((char *)name.name, (__le16 *)de.name,

				       UNICODE_NAME_MAX,

				       min(de.namelen, (size_t)max_len), nlt,

				       cifs_sb->mnt_cifs_flags &

						CIFS_MOUNT_MAP_SPECIAL_CHR);

		name.len -= nls_nullsize(nlt);

	} else {

		name.name = de.name;

		name.len = de.namelen;

	}



	switch (file_info->srch_inf.info_level) {

	case SMB_FIND_FILE_UNIX:
@@ -781,8 +718,8 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, 
		break;

	}



	if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {

		fattr.cf_uniqueid = inum;

	if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {

		fattr.cf_uniqueid = de.ino;

	} else {

		fattr.cf_uniqueid = iunique(sb, ROOT_I);

		cifs_autodisable_serverino(cifs_sb);