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Subject[PATCH 1/8] eventfs: introducing struct tracefs_inode
Date
Introducing tracefs_inode structure, this will help eventfs
to keep track of inode, flags and pointer to private date.

Renaming, removing static property from some function name.

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>
---
fs/tracefs/inode.c | 20 ++++++++++----------
fs/tracefs/internal.h | 25 +++++++++++++++++++++++++
2 files changed, 35 insertions(+), 10 deletions(-)
create mode 100644 fs/tracefs/internal.h

diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index da85b39..015b7b8 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -127,7 +127,7 @@ static const struct inode_operations tracefs_dir_inode_operations = {
.rmdir = tracefs_syscall_rmdir,
};

-static struct inode *tracefs_get_inode(struct super_block *sb)
+struct inode *tracefs_get_inode(struct super_block *sb)
{
struct inode *inode = new_inode(sb);
if (inode) {
@@ -399,7 +399,7 @@ static struct file_system_type trace_fs_type = {
};
MODULE_ALIAS_FS("tracefs");

-static struct dentry *start_creating(const char *name, struct dentry *parent)
+struct dentry *tracefs_start_creating(const char *name, struct dentry *parent)
{
struct dentry *dentry;
int error;
@@ -437,7 +437,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
return dentry;
}

-static struct dentry *failed_creating(struct dentry *dentry)
+struct dentry *tracefs_failed_creating(struct dentry *dentry)
{
inode_unlock(d_inode(dentry->d_parent));
dput(dentry);
@@ -445,7 +445,7 @@ static struct dentry *failed_creating(struct dentry *dentry)
return NULL;
}

-static struct dentry *end_creating(struct dentry *dentry)
+struct dentry *tracefs_end_creating(struct dentry *dentry)
{
inode_unlock(d_inode(dentry->d_parent));
return dentry;
@@ -490,14 +490,14 @@ struct dentry *tracefs_create_file(const char *name, umode_t mode,
if (!(mode & S_IFMT))
mode |= S_IFREG;
BUG_ON(!S_ISREG(mode));
- dentry = start_creating(name, parent);
+ dentry = tracefs_start_creating(name, parent);

if (IS_ERR(dentry))
return NULL;

inode = tracefs_get_inode(dentry->d_sb);
if (unlikely(!inode))
- return failed_creating(dentry);
+ return tracefs_failed_creating(dentry);

inode->i_mode = mode;
inode->i_fop = fops ? fops : &tracefs_file_operations;
@@ -506,13 +506,13 @@ struct dentry *tracefs_create_file(const char *name, umode_t mode,
inode->i_gid = d_inode(dentry->d_parent)->i_gid;
d_instantiate(dentry, inode);
fsnotify_create(d_inode(dentry->d_parent), dentry);
- return end_creating(dentry);
+ return tracefs_end_creating(dentry);
}

static struct dentry *__create_dir(const char *name, struct dentry *parent,
const struct inode_operations *ops)
{
- struct dentry *dentry = start_creating(name, parent);
+ struct dentry *dentry = tracefs_start_creating(name, parent);
struct inode *inode;

if (IS_ERR(dentry))
@@ -520,7 +520,7 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent,

inode = tracefs_get_inode(dentry->d_sb);
if (unlikely(!inode))
- return failed_creating(dentry);
+ return tracefs_failed_creating(dentry);

/* Do not set bits for OTH */
inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP;
@@ -534,7 +534,7 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent,
d_instantiate(dentry, inode);
inc_nlink(d_inode(dentry->d_parent));
fsnotify_mkdir(d_inode(dentry->d_parent), dentry);
- return end_creating(dentry);
+ return tracefs_end_creating(dentry);
}

/**
diff --git a/fs/tracefs/internal.h b/fs/tracefs/internal.h
new file mode 100644
index 0000000..27869ea
--- /dev/null
+++ b/fs/tracefs/internal.h
@@ -0,0 +1,25 @@
+#ifndef _TRACEFS_INTERNAL_H
+#define _TRACEFS_INTERNAL_H
+
+enum {
+ TRACEFS_EVENT_INODE = BIT(1),
+};
+
+struct tracefs_inode {
+ unsigned long flags;
+ void *private;
+ struct inode vfs_inode;
+};
+
+static inline struct tracefs_inode *get_tracefs(const struct inode *inode)
+{
+ return container_of(inode, struct tracefs_inode, vfs_inode);
+}
+
+struct dentry *tracefs_start_creating(const char *name, struct dentry *parent);
+struct dentry *tracefs_end_creating(struct dentry *dentry);
+struct dentry *tracefs_failed_creating(struct dentry *dentry);
+struct inode *tracefs_get_inode(struct super_block *sb);
+
+#endif
+
--
2.7.4
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