[PATCH 4/8] eventfs: adding eventfs file, directory remove function
From: Ajay Kaher <hidden>
Date: 2023-01-22 17:07:55
Also in:
lkml
Subsystem:
filesystems (vfs and infrastructure), the rest, tracing · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Adding eventfs_remove(), this function will recursively remove dir or file info from eventfs. Signed-off-by: Ajay Kaher <redacted> Co-developed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Tested-by: Ching-lin Yu <redacted> --- fs/tracefs/event_inode.c | 26 ++++++++++++++++++++++++++ include/linux/tracefs.h | 2 ++ 2 files changed, 28 insertions(+)
diff --git a/fs/tracefs/event_inode.c b/fs/tracefs/event_inode.c
index e479712..4d47da0 100644
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c@@ -279,3 +279,29 @@ int eventfs_add_file(const char *name, umode_t mode, list_add_tail(&ef->list, &ef_parent->ei->e_top_files); return 0; } + +/** + * eventfs_remove - remove eventfs dir or file from list + * @eventfs_file: a pointer to eventfs_file to be removed. + * + * This function recursively remove eventfs_file which + * contains info of file or dir. + */ +void eventfs_remove(struct eventfs_file *ef) +{ + struct eventfs_file *ef_child, *n; + + if (!ef) + return; + + if (ef->ei) { + /* search for nested folders or files */ + list_for_each_entry_safe(ef_child, n, &ef->ei->e_top_files, list) { + eventfs_remove(ef_child); + } + kfree(ef->ei); + } + list_del(&ef->list); + kfree(ef->name); + kfree(ef); +}
diff --git a/include/linux/tracefs.h b/include/linux/tracefs.h
index 7d390d2..b02cbba 100644
--- a/include/linux/tracefs.h
+++ b/include/linux/tracefs.h@@ -55,6 +55,8 @@ int eventfs_add_top_file(const char *name, umode_t mode, struct dentry *parent, void *data, const struct file_operations *fops); +void eventfs_remove(struct eventfs_file *ef); + struct dentry *tracefs_create_file(const char *name, umode_t mode, struct dentry *parent, void *data, const struct file_operations *fops);
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2.7.4