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Date: Mon, 27 Apr 2009 17:53:39 -0400
From: Eric Paris <eparis@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: viro@...iv.linux.org.uk, hch@...radead.org,
alan@...rguk.ukuu.org.uk, sfr@...b.auug.org.au,
john@...nmccutchan.com, rlove@...ve.org, akpm@...ux-foundation.org
Subject: [PATCH 07/12] fsnotify: include pathnames with entries when possible
When inotify wants to send events to a directory about a child it includes
the name of the original file. This patch collects that filename and makes
it available for notification.
Signed-off-by: Eric Paris <eparis@...hat.com>
---
fs/notify/fsnotify.c | 7 ++++---
fs/notify/notification.c | 16 ++++++++++++++-
include/linux/fsnotify.h | 40 +++++++++++++++++++++++++-------------
include/linux/fsnotify_backend.h | 11 ++++++++--
4 files changed, 53 insertions(+), 21 deletions(-)
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 2dbab3c..d73f9de 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -114,7 +114,8 @@ void __fsnotify_parent(struct dentry *dentry, __u32 mask)
* specifies these are events which came from a child. */
mask |= FS_EVENT_ON_CHILD;
- fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
+ dentry->d_name.name);
dput(parent);
}
@@ -131,7 +132,7 @@ EXPORT_SYMBOL_GPL(__fsnotify_parent);
* out to all of the registered fsnotify_group. Those groups can then use the
* notification event in whatever means they feel necessary.
*/
-void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is)
+void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const char *file_name)
{
struct fsnotify_group *group;
struct fsnotify_event *event = NULL;
@@ -156,7 +157,7 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is)
if (!group->ops->should_send_event(group, to_tell, mask))
continue;
if (!event) {
- event = fsnotify_create_event(to_tell, mask, data, data_is);
+ event = fsnotify_create_event(to_tell, mask, data, data_is, file_name);
/* shit, we OOM'd and now we can't tell, maybe
* someday someone else will want to do something
* here */
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index dddecc7..c69b18b 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -78,6 +78,7 @@ void fsnotify_put_event(struct fsnotify_event *event)
if (event->data_type == FSNOTIFY_EVENT_PATH)
path_put(&event->path);
+ kfree(event->file_name);
kmem_cache_free(fsnotify_event_cachep, event);
}
}
@@ -262,6 +263,9 @@ static void initialize_event(struct fsnotify_event *event)
event->data_type = FSNOTIFY_EVENT_NONE;
event->to_tell = NULL;
+
+ event->file_name = NULL;
+ event->name_len = 0;
}
/*
@@ -274,9 +278,10 @@ static void initialize_event(struct fsnotify_event *event)
* @mask what actually happened.
* @data pointer to the object which was actually affected
* @data_type flag indication if the data is a file, path, inode, nothing...
+ * @name the filename, if available
*/
struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
- void *data, int data_type)
+ void *data, int data_type, const char *name)
{
struct fsnotify_event *event;
@@ -285,6 +290,15 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
return NULL;
initialize_event(event);
+
+ if (name) {
+ event->file_name = kstrdup(name, GFP_KERNEL);
+ if (!event->file_name) {
+ kmem_cache_free(fsnotify_event_cachep, event);
+ return NULL;
+ }
+ event->name_len = strlen(event->file_name);
+ }
event->to_tell = to_tell;
switch (data_type) {
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 3ecd033..883ead4 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -58,7 +58,19 @@ static inline void fsnotify_link_count(struct inode *inode)
{
inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL);
- fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL);
+}
+
+/*
+ * fsnotify_inode_remove - an inode is going away
+ */
+static inline void fsnotify_inode_remove(struct inode *inode)
+{
+ inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
+ inotify_inode_is_dead(inode);
+
+ fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL);
+ __fsnotify_inode_delete(inode);
}
/*
@@ -91,8 +103,8 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name,
source);
- fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE);
- fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE);
+ fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name);
+ fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name);
if (target) {
inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
@@ -104,7 +116,7 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
if (source) {
inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
- fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL);
}
audit_inode_child(new_name, moved, new_dir);
}
@@ -138,7 +150,7 @@ static inline void fsnotify_inoderemove(struct inode *inode)
inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
inotify_inode_is_dead(inode);
- fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL);
}
/*
@@ -150,7 +162,7 @@ static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
dentry->d_inode);
audit_inode_child(dentry->d_name.name, dentry, inode);
- fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name);
}
/*
@@ -165,7 +177,7 @@ static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct
fsnotify_link_count(inode);
audit_inode_child(new_dentry->d_name.name, new_dentry, dir);
- fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name);
}
/*
@@ -179,7 +191,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode);
audit_inode_child(dentry->d_name.name, dentry, inode);
- fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name);
}
/*
@@ -196,7 +208,7 @@ static inline void fsnotify_access(struct dentry *dentry)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL);
}
/*
@@ -213,7 +225,7 @@ static inline void fsnotify_modify(struct dentry *dentry)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL);
}
/*
@@ -230,7 +242,7 @@ static inline void fsnotify_open(struct dentry *dentry)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL);
}
/*
@@ -249,7 +261,7 @@ static inline void fsnotify_close(struct file *file)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE);
+ fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL);
}
/*
@@ -266,7 +278,7 @@ static inline void fsnotify_xattr(struct dentry *dentry)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL);
}
/*
@@ -302,7 +314,7 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
fsnotify_parent(dentry, mask);
- fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL);
}
}
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 15f8f82..52692f4 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -192,6 +192,9 @@ struct fsnotify_event {
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 */
+
+ char *file_name;
+ size_t name_len;
};
/*
@@ -224,7 +227,7 @@ struct fsnotify_mark_entry {
/* called from the vfs helpers */
/* main fsnotify call to send events */
-extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is);
+extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const char *name);
extern void __fsnotify_parent(struct dentry *dentry, __u32 mask);
extern void __fsnotify_inode_delete(struct inode *inode);
@@ -319,10 +322,12 @@ extern void fsnotify_put_mark(struct fsnotify_mark_entry *entry);
/* put here because inotify does some weird stuff when destroying watches */
extern struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
- void *data, int data_is);
+ void *data, int data_is, const char *name);
+
#else
-static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is)
+static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
+ const char *name);
{}
static inline void __fsnotify_parent(struct dentry *dentry, __u32 mask)
--
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