vfs_rename(9) [centos man page]

VFS_RENAME(9)							   The Linux VFS						     VFS_RENAME(9)

NAME

       vfs_rename - rename a filesystem object

SYNOPSIS

       int vfs_rename(struct inode * old_dir, struct dentry * old_dentry, struct inode * new_dir, struct dentry * new_dentry,
		      struct inode ** delegated_inode);

ARGUMENTS

       old_dir
	   parent of source

       old_dentry
	   source

       new_dir
	   parent of destination

       new_dentry
	   destination

       delegated_inode
	   returns an inode needing a delegation break

DESCRIPTION

       The caller must hold multiple mutexes--see lock_rename).

       If vfs_rename discovers a delegation in need of breaking at either the source or destination, it will return -EWOULDBLOCK and return a
       reference to the inode in delegated_inode. The caller should then break the delegation and retry. Because breaking a delegation may take a
       long time, the caller should drop all locks before doing so.

       Alternatively, a caller may pass NULL for delegated_inode. This may be appropriate for callers that expect the underlying filesystem not to
       be NFS exported.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							     VFS_RENAME(9)

DEBUGFS_CREATE_BLOB(9)					      The debugfs filesystem					    DEBUGFS_CREATE_BLOB(9)

NAME

       debugfs_create_blob - create a debugfs file that is used to read a binary blob

SYNOPSIS

       struct dentry * debugfs_create_blob(const char * name, umode_t mode, struct dentry * parent, struct debugfs_blob_wrapper * blob);

ARGUMENTS

       name
	   a pointer to a string containing the name of the file to create.

       mode
	   the permission that the file should have

       parent
	   a pointer to the parent dentry for this file. This should be a directory dentry if set. If this parameter is NULL, then the file will
	   be created in the root of the debugfs filesystem.

       blob
	   a pointer to a struct debugfs_blob_wrapper which contains a pointer to the blob data and the size of the data.

DESCRIPTION

       This function creates a file in debugfs with the given name that exports blob->data as a binary blob. If the mode variable is so set it can
       be read from. Writing is not supported.

       This function will return a pointer to a dentry if it succeeds. This pointer must be passed to the debugfs_remove function when the file is
       to be removed (no automatic cleanup happens if your module is unloaded, you are responsible here.) If an error occurs, NULL will be
       returned.

       If debugfs is not enabled in the kernel, the value -ENODEV will be returned. It is not wise to check for this value, but rather, check for
       NULL or !NULL instead as to eliminate the need for #ifdef in the calling code.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    DEBUGFS_CREATE_BLOB(9)