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eventfs: Implement eventfs dir creation functions

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Add eventfs_file structure which will hold the properties of the eventfs
files and directories.

Add following functions to create the directories in eventfs:

eventfs_create_events_dir() will create the top level "events" directory
within the tracefs file system.

eventfs_add_subsystem_dir() creates an eventfs_file descriptor with the
given name of the subsystem.

eventfs_add_dir() creates an eventfs_file descriptor with the given name of
the directory and attached to a eventfs_file of a subsystem.

Add tracefs_inode structure to hold the inodes, flags and pointers to
private data used by eventfs.

Link: https://lkml.kernel.org/r/1690568452-46553-5-git-send-email-akaher@vmware.com

Signed-off-by: Ajay Kaher <akaher@vmware.com>
Co-developed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Tested-by: Ching-lin Yu <chinglinyu@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202305051619.9a469a9a-yujie.liu@intel.com
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Ajay Kaher
2023-07-28 23:50:46 +05:30
committed by Steven Rostedt (Google)
parent 2c6b6b1029
commit c1504e5102
4 changed files with 227 additions and 0 deletions
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11
include/linux/tracefs.h
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@@ -21,6 +21,17 @@ struct file_operations;
#ifdef CONFIG_TRACING
struct eventfs_file;
struct dentry *eventfs_create_events_dir(const char *name,
struct dentry *parent);
struct eventfs_file *eventfs_add_subsystem_dir(const char *name,
struct dentry *parent);
struct eventfs_file *eventfs_add_dir(const char *name,
struct eventfs_file *ef_parent);
struct dentry *tracefs_create_file(const char *name, umode_t mode,
struct dentry *parent, void *data,
const struct file_operations *fops);