Commit 2422f676 authored by Jeff Layton's avatar Jeff Layton
Browse files

cifs: move cifs_new_fileinfo call out of cifs_posix_open 



Having cifs_posix_open call cifs_new_fileinfo is problematic and
inconsistent with how "regular" opens work. It's also buggy as
cifs_reopen_file calls this function on a reconnect, which creates a new
struct cifsFileInfo that just gets leaked.

Push it out into the callers. This also allows us to get rid of the
"mnt" arg to cifs_posix_open.

Finally, in the event that a cifsFileInfo isn't or can't be created, we
always want to close the filehandle out on the server as the client
won't have a record of the filehandle and can't actually use it. Make
sure that CIFSSMBClose is called in those cases.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Reviewed-and-Tested-by: default avatarSuresh Jayaraman <sjayaraman@suse.de>
parent 0933a95d

fs/cifs/cifsproto.h

+0 −1
Original line number Diff line number Diff line
@@ -106,7 +106,6 @@ extern struct cifsFileInfo *cifs_new_fileinfo(struct inode *newinode, 
				__u16 fileHandle, struct file *file,

				struct vfsmount *mnt, unsigned int oflags);

extern int cifs_posix_open(char *full_path, struct inode **pinode,

				struct vfsmount *mnt,

				struct super_block *sb,

				int mode, int oflags,

				__u32 *poplock, __u16 *pnetfid, int xid);

fs/cifs/dir.c

+18 −25
Original line number Diff line number Diff line
@@ -188,8 +188,7 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, 
}



int cifs_posix_open(char *full_path, struct inode **pinode,

			struct vfsmount *mnt, struct super_block *sb,

			int mode, int oflags,

			struct super_block *sb, int mode, int oflags,

			__u32 *poplock, __u16 *pnetfid, int xid)

{

	int rc;
@@ -258,19 +257,6 @@ int cifs_posix_open(char *full_path, struct inode **pinode, 
		cifs_fattr_to_inode(*pinode, &fattr);

	}



	/*

	 * cifs_fill_filedata() takes care of setting cifsFileInfo pointer to

	 * file->private_data.

	 */

	if (mnt) {

		struct cifsFileInfo *pfile_info;



		pfile_info = cifs_new_fileinfo(*pinode, *pnetfid, NULL, mnt,

					       oflags);

		if (pfile_info == NULL)

			rc = -ENOMEM;

	}



posix_open_ret:

	kfree(presp_data);

	return rc;
@@ -298,7 +284,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, 
	int create_options = CREATE_NOT_DIR;

	__u32 oplock = 0;

	int oflags;

	bool posix_create = false;

	/*

	 * BB below access is probably too much for mknod to request

	 *    but we have to do query and setpathinfo so requesting
@@ -339,7 +324,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, 
	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &

			le64_to_cpu(tcon->fsUnixInfo.Capability))) {

		rc = cifs_posix_open(full_path, &newinode,

			nd ? nd->path.mnt : NULL,

			inode->i_sb, mode, oflags, &oplock, &fileHandle, xid);

		/* EIO could indicate that (posix open) operation is not

		   supported, despite what server claimed in capability
@@ -347,7 +331,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, 
		   handled in posix open */



		if (rc == 0) {

			posix_create = true;

			if (newinode == NULL) /* query inode info */

				goto cifs_create_get_file_info;

			else /* success, no need to query */
@@ -478,11 +461,7 @@ cifs_create_set_dentry: 
	else

		cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);



	/* nfsd case - nfs srv does not set nd */

	if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) {

		/* mknod case - do not leave file open */

		CIFSSMBClose(xid, tcon, fileHandle);

	} else if (!(posix_create) && (newinode)) {

	if (newinode && nd && (nd->flags & LOOKUP_OPEN)) {

		struct cifsFileInfo *pfile_info;

		/*

		 * cifs_fill_filedata() takes care of setting cifsFileInfo
@@ -492,7 +471,10 @@ cifs_create_set_dentry: 
					       nd->path.mnt, oflags);

		if (pfile_info == NULL)

			rc = -ENOMEM;

	} else {

		CIFSSMBClose(xid, tcon, fileHandle);

	}



cifs_create_out:

	kfree(buf);

	kfree(full_path);
@@ -636,6 +618,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, 
	bool posix_open = false;

	struct cifs_sb_info *cifs_sb;

	struct cifsTconInfo *pTcon;

	struct cifsFileInfo *cfile;

	struct inode *newInode = NULL;

	char *full_path = NULL;

	struct file *filp;
@@ -703,7 +686,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, 
		if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&

		     (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&

		     (nd->intent.open.flags & O_CREAT)) {

			rc = cifs_posix_open(full_path, &newInode, nd->path.mnt,

			rc = cifs_posix_open(full_path, &newInode,

					parent_dir_inode->i_sb,

					nd->intent.open.create_mode,

					nd->intent.open.flags, &oplock,
@@ -733,8 +716,17 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, 
		else

			direntry->d_op = &cifs_dentry_ops;

		d_add(direntry, newInode);

		if (posix_open)

		if (posix_open) {

			cfile = cifs_new_fileinfo(newInode, fileHandle, NULL,

						  nd->path.mnt,

						  nd->intent.open.flags);

			if (cfile == NULL) {

				CIFSSMBClose(xid, pTcon, fileHandle);

				rc = -ENOMEM;

				goto lookup_out;

			}

			filp = lookup_instantiate_filp(nd, direntry, NULL);

		}

		/* since paths are not looked up by component - the parent

		   directories are presumed to be good here */

		renew_parental_timestamps(direntry);
@@ -755,6 +747,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, 
		is a common return code */

	}



lookup_out:

	kfree(full_path);

	FreeXid(xid);

	return ERR_PTR(rc);

fs/cifs/file.c

+12 −5
Original line number Diff line number Diff line
@@ -299,8 +299,7 @@ int cifs_open(struct inode *inode, struct file *file) 
		int oflags = (int) cifs_posix_convert_flags(file->f_flags);

		oflags |= SMB_O_CREAT;

		/* can not refresh inode info since size could be stale */

		rc = cifs_posix_open(full_path, &inode, file->f_path.mnt,

				inode->i_sb,

		rc = cifs_posix_open(full_path, &inode, inode->i_sb,

				cifs_sb->mnt_file_mode /* ignored */,

				oflags, &oplock, &netfid, xid);

		if (rc == 0) {
@@ -308,7 +307,16 @@ int cifs_open(struct inode *inode, struct file *file) 
			/* no need for special case handling of setting mode

			   on read only files needed here */



			pCifsFile = cifs_fill_filedata(file);

			pCifsFile = cifs_new_fileinfo(inode, netfid, file,

							file->f_path.mnt,

							oflags);

			if (pCifsFile == NULL) {

				CIFSSMBClose(xid, tcon, netfid);

				rc = -ENOMEM;

				goto out;

			}

			file->private_data = pCifsFile;



			cifs_posix_open_inode_helper(inode, file, pCifsInode,

						     oplock, netfid);

			goto out;
@@ -513,8 +521,7 @@ reopen_error_exit: 
			le64_to_cpu(tcon->fsUnixInfo.Capability))) {

		int oflags = (int) cifs_posix_convert_flags(file->f_flags);

		/* can not refresh inode info since size could be stale */

		rc = cifs_posix_open(full_path, NULL, file->f_path.mnt,

				inode->i_sb,

		rc = cifs_posix_open(full_path, NULL, inode->i_sb,

				cifs_sb->mnt_file_mode /* ignored */,

				oflags, &oplock, &netfid, xid);

		if (rc == 0) {

CRA Git | Maintained and supported by SUSTech CRA and CCSE