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From: Eric Paris on 27 Oct 2009 15:20
Some fsnotify operations send a struct file. This is more information than
we technically need. We instead send a struct path in all cases instead of
sometimes a path and sometimes a file.

Sigend-off-by: Andreas Gruenbacher <agruen(a)suse.de>
Signed-off-by: Eric Paris <eparis(a)redhat.com>
---

fs/notify/fsnotify.c | 12 +++++-------
fs/notify/notification.c | 9 ---------
include/linux/fsnotify.h | 36 +++++++++++++++++++-----------------
include/linux/fsnotify_backend.h | 5 ++---
4 files changed, 26 insertions(+), 36 deletions(-)

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 5d1d2ed..b076b06 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -78,15 +78,15 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
}

/* Notify this dentry's parent about a child's events. */
-void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{
struct dentry *parent;
struct inode *p_inode;
bool send = false;
bool should_update_children = false;

- if (file)
- dentry = file->f_path.dentry;
+ if (!dentry)
+ dentry = path->dentry;

if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
return;
@@ -118,8 +118,8 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
* specifies these are events which came from a child. */
mask |= FS_EVENT_ON_CHILD;

- if (file)
- fsnotify(p_inode, mask, file, FSNOTIFY_EVENT_FILE,
+ if (path)
+ fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
dentry->d_name.name, 0);
else
fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
@@ -193,8 +193,6 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const

if (data_is == FSNOTIFY_EVENT_PATH)
mnt = ((struct path *)data)->mnt;
- else if (data_is == FSNOTIFY_EVENT_FILE)
- mnt = ((struct file *)data)->f_path.mnt;

/* if this inode's directed listeners don't care and nothing on the vfsmount
* listeners list cares, nothing to do */
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index dafd0b7..066f1f9 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -390,15 +390,6 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
event->data_type = data_type;

switch (data_type) {
- case FSNOTIFY_EVENT_FILE: {
- struct file *file = data;
- struct path *path = &file->f_path;
- event->path.dentry = path->dentry;
- event->path.mnt = path->mnt;
- path_get(&event->path);
- event->data_type = FSNOTIFY_EVENT_PATH;
- break;
- }
case FSNOTIFY_EVENT_PATH: {
struct path *path = data;
event->path.dentry = path->dentry;
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index c0de28b..2d032b9 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -29,14 +29,12 @@ static inline void fsnotify_d_instantiate(struct dentry *entry,
}

/* Notify this dentry's parent about a child's events. */
-static inline void fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{
- BUG_ON(file && dentry);
+ if (!dentry)
+ dentry = path->dentry;

- if (file)
- dentry = file->f_path.dentry;
-
- __fsnotify_parent(file, dentry, mask);
+ __fsnotify_parent(path, dentry, mask);

inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
}
@@ -190,7 +188,8 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
*/
static inline void fsnotify_access(struct file *file)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct path *path = &file->f_path;
+ struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_ACCESS;

if (S_ISDIR(inode->i_mode))
@@ -198,8 +197,8 @@ static inline void fsnotify_access(struct file *file)

inotify_inode_queue_event(inode, mask, 0, NULL, NULL);

- fsnotify_parent(file, NULL, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ fsnotify_parent(path, NULL, mask);
+ fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}

/*
@@ -207,7 +206,8 @@ static inline void fsnotify_access(struct file *file)
*/
static inline void fsnotify_modify(struct file *file)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct path *path = &file->f_path;
+ struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_MODIFY;

if (S_ISDIR(inode->i_mode))
@@ -215,8 +215,8 @@ static inline void fsnotify_modify(struct file *file)

inotify_inode_queue_event(inode, mask, 0, NULL, NULL);

- fsnotify_parent(file, NULL, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ fsnotify_parent(path, NULL, mask);
+ fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}

/*
@@ -224,7 +224,8 @@ static inline void fsnotify_modify(struct file *file)
*/
static inline void fsnotify_open(struct file *file)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct path *path = &file->f_path;
+ struct inode *inode = path->dentry->d_inode;
__u32 mask = FS_OPEN;

if (S_ISDIR(inode->i_mode))
@@ -232,8 +233,8 @@ static inline void fsnotify_open(struct file *file)

inotify_inode_queue_event(inode, mask, 0, NULL, NULL);

- fsnotify_parent(file, NULL, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ fsnotify_parent(path, NULL, mask);
+ fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}

/*
@@ -241,6 +242,7 @@ static inline void fsnotify_open(struct file *file)
*/
static inline void fsnotify_close(struct file *file)
{
+ struct path *path = &file->f_path;
struct inode *inode = file->f_path.dentry->d_inode;
fmode_t mode = file->f_mode;
__u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
@@ -250,8 +252,8 @@ static inline void fsnotify_close(struct file *file)

inotify_inode_queue_event(inode, mask, 0, NULL, NULL);

- fsnotify_parent(file, NULL, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+ fsnotify_parent(path, NULL, mask);
+ fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}

/*
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index cf16585..7a6ba75 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -214,7 +214,6 @@ struct fsnotify_event {
#define FSNOTIFY_EVENT_NONE 0
#define FSNOTIFY_EVENT_PATH 1
#define FSNOTIFY_EVENT_INODE 2
-#define FSNOTIFY_EVENT_FILE 3
int data_type; /* which of the above union we have */
atomic_t refcnt; /* how many groups still are using/need to send this event */
__u32 mask; /* the type of access, bitwise OR for FS_* event types */
@@ -280,7 +279,7 @@ struct fsnotify_mark_entry {
/* main fsnotify call to send events */
extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
const char *name, u32 cookie);
-extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
+extern void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
extern void __fsnotify_inode_delete(struct inode *inode);
extern u32 fsnotify_get_cookie(void);

@@ -393,7 +392,7 @@ static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int d
const char *name, u32 cookie)
{}

-static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{}

static inline void __fsnotify_inode_delete(struct inode *inode)

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Prev: ark3116: (3rd try) Setup some basic infrastructure for new ark3116 driver.
Next: x86, mce: disable MCE if cpu has no MCE banks