[RFC PATCH -v4 11/14] fsnotify: include pathnames with entries whenpossible
From: Eric Paris
Date: Fri Dec 12 2008 - 16:55:51 EST
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@xxxxxxxxxx>
---
fs/notify/fsnotify.c | 4 ++--
fs/notify/fsnotify.h | 9 ++++++---
fs/notify/notification.c | 19 ++++++++++++++++++-
include/linux/fsnotify.h | 34 +++++++++++++++++-----------------
include/linux/fsnotify_backend.h | 4 ++--
5 files changed, 45 insertions(+), 25 deletions(-)
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 61157f2..c48dcf6 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -34,7 +34,7 @@ void __fsnotify_inode_delete(struct inode *inode, int flag)
}
EXPORT_SYMBOL_GPL(__fsnotify_inode_delete);
-void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is)
+void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is, const char *file_name)
{
struct fsnotify_group *group;
struct fsnotify_event *event = NULL;
@@ -66,7 +66,7 @@ void fsnotify(struct inode *to_tell, __u64 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, lets hope something else blows up */
if (!event)
break;
diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h
index 6b2dc15..89677ee 100644
--- a/fs/notify/fsnotify.h
+++ b/fs/notify/fsnotify.h
@@ -57,6 +57,9 @@ struct fsnotify_event {
__u64 mask; /* the type of access */
atomic_t refcnt; /* how many groups still are using/need to send this event */
+ char *file_name;
+ size_t name_len;
+
struct list_head private_data_list;
};
@@ -99,13 +102,13 @@ extern int fsnotify_check_notif_queue(struct fsnotify_group *group);
extern struct fsnotify_event *fsnotify_peek_notif_event(struct fsnotify_group *group);
extern struct fsnotify_event *fsnotify_remove_notif_event(struct fsnotify_group *group);
-extern struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask, void *data, int data_is);
+extern struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask, void *data, int data_is, const char *name);
extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group);
extern void fsnotify_clear_marks_by_inode(struct inode *inode, unsigned int flags);
extern void fsnotify_destroy_mark_by_entry(struct fsnotify_mark_entry *entry);
extern void fsnotify_get_mark(struct fsnotify_mark_entry *entry);
extern void fsnotify_put_mark(struct fsnotify_mark_entry *entry);
- extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
- extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
+extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
+extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
#endif /* _LINUX_FSNOTIFY_PRIVATE_H */
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index e039a47..8ed9d32 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -62,6 +62,7 @@ void fsnotify_put_event(struct fsnotify_event *event)
event->mask = 0;
BUG_ON(!list_empty(&event->private_data_list));
+ kfree(event->file_name);
kmem_cache_free(event_kmem_cache, event);
}
}
@@ -196,7 +197,7 @@ void fsnotify_flush_notif(struct fsnotify_group *group)
mutex_unlock(&group->notification_mutex);
}
-struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask, void *data, int data_is)
+struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask, void *data, int data_is, const char *name)
{
struct fsnotify_event *event;
@@ -204,6 +205,18 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask,
if (!event)
return NULL;
+ if (name) {
+ event->file_name = kstrdup(name, GFP_KERNEL);
+ if (!event->file_name) {
+ kmem_cache_free(event_kmem_cache, event);
+ return NULL;
+ }
+ event->name_len = strlen(event->file_name);
+ } else {
+ event->file_name = NULL;
+ event->name_len = 0;
+ }
+
event->holder.event = NULL;
INIT_LIST_HEAD(&event->holder.event_list);
atomic_set(&event->refcnt, 1);
@@ -222,6 +235,7 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask,
switch (data_is) {
case FSNOTIFY_EVENT_FILE: {
struct file *file = data;
+
event->path.dentry = file->f_path.dentry;
event->path.mnt = file->f_path.mnt;
path_get(&event->path);
@@ -231,6 +245,9 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u64 mask,
event->inode = data;
break;
default:
+ event->path.dentry = NULL;
+ event->path.mnt = NULL;
+ event->inode = NULL;
BUG();
};
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 791d288..8f4caf8 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -98,7 +98,7 @@ static inline void fsnotify_parent(struct dentry *dentry, __u64 orig_mask)
if (p_inode && (p_inode->i_fsnotify_mask & mask)) {
dget(parent);
spin_unlock(&dentry->d_lock);
- 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);
} else {
spin_unlock(&dentry->d_lock);
@@ -152,18 +152,18 @@ 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);
inotify_inode_is_dead(target);
- fsnotify(target, FS_DELETE, target, FSNOTIFY_EVENT_INODE);
+ fsnotify(target, FS_DELETE, target, FSNOTIFY_EVENT_INODE, NULL);
}
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);
}
@@ -196,7 +196,7 @@ 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);
__fsnotify_inode_delete(inode, FSNOTIFY_LAST_DENTRY);
}
@@ -207,7 +207,7 @@ 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);
}
/*
@@ -219,7 +219,7 @@ 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);
}
/*
@@ -234,7 +234,7 @@ 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);
}
/*
@@ -246,7 +246,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
dentry->d_name.name, dentry->d_inode);
audit_inode_child(dentry->d_name.name, dentry, inode);
- fsnotify(inode, FS_CREATE | FS_IN_ISDIR, dentry->d_inode, FSNOTIFY_EVENT_INODE);
+ fsnotify(inode, FS_CREATE | FS_IN_ISDIR, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name);
}
/*
@@ -265,7 +265,7 @@ static inline void fsnotify_access(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);
}
/*
@@ -284,7 +284,7 @@ static inline void fsnotify_modify(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);
}
/*
@@ -299,7 +299,7 @@ static inline void fsnotify_open_exec(struct file *file)
inotify_inode_queue_event(inode, IN_ACCESS, 0, NULL, NULL);
fsnotify_parent(dentry, FS_ACCESS);
- fsnotify(inode, FS_ACCESS, file, FSNOTIFY_EVENT_FILE);
+ fsnotify(inode, FS_ACCESS, file, FSNOTIFY_EVENT_FILE, NULL);
}
/*
@@ -318,7 +318,7 @@ static inline void fsnotify_open(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);
}
/*
@@ -339,7 +339,7 @@ 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);
}
/*
@@ -357,7 +357,7 @@ 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);
}
/*
@@ -395,7 +395,7 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
dentry->d_name.name);
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 b6d1895..cf24ff1 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -118,7 +118,7 @@ struct fsnotify_group {
#ifdef CONFIG_FSNOTIFY
/* called from the vfs to signal fs events */
-extern void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is);
+extern void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is, const char *name);
extern void __fsnotify_inode_delete(struct inode *inode, int flag);
/* called from fsnotify interfaces, such as fanotify or dnotify */
@@ -133,7 +133,7 @@ extern struct fsnotify_mark_entry *fsnotify_find_mark_entry(struct fsnotify_grou
extern struct fsnotify_mark_entry *fsnotify_mark_add(struct fsnotify_group *group, struct inode *inode, __u64 mask);
#else
-static inline void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is);
+static inline void fsnotify(struct inode *to_tell, __u64 mask, void *data, int data_is, const char *name);
{}
static inline void __fsnotify_inode_delete(struct inode *inode, int flag)
--
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