From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: [take 2] Use pid in inotify events. Date: Mon, 10 Nov 2008 18:13:45 +0300 Message-ID: <20081110151345.GA15796@ioremap.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Robert Love Cc: John McCutchan , linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, Andrew Morton List-Id: linux-api@vger.kernel.org Hi. This patch allows to send IO origin PID in inotify events (using cookie fields for all events except moving, where it is already used to track move from and move to parts) when its uid matches inotify owner uid or when inotify owner has admin capabilities (Jeff Schroeder's idea). Signed-off-by: Evgeniy Polyakov diff --git a/fs/inotify.c b/fs/inotify.c index 690e725..835259d 100644 --- a/fs/inotify.c +++ b/fs/inotify.c @@ -69,6 +69,9 @@ static atomic_t inotify_cookie; * inotify_add_watch() to the final put_inotify_watch(). */ +#define IH_FLAGS_ADMIN (0x00000001) +/* handler owner has admin capabilities */ + /* * struct inotify_handle - represents an inotify instance * @@ -80,6 +83,8 @@ struct inotify_handle { struct list_head watches; /* list of watches */ atomic_t count; /* reference count */ u32 last_wd; /* the last wd allocated */ + uid_t uid; /* owner's uid */ + u32 flags; /* operation flags */ const struct inotify_operations *in_ops; /* inotify caller operations */ }; @@ -292,6 +297,11 @@ void inotify_inode_queue_event(struct inode *inode, u32 mask, u32 cookie, mutex_lock(&ih->mutex); if (watch_mask & IN_ONESHOT) remove_watch_no_event(watch, ih); + + if (!cookie && ((ih->flags & IH_FLAGS_ADMIN) || + (current->uid == ih->uid))) + cookie = task_tgid_vnr(current); + ih->in_ops->handle_event(watch, watch->wd, mask, cookie, name, n_inode); mutex_unlock(&ih->mutex); @@ -459,6 +469,10 @@ struct inotify_handle *inotify_init(const struct inotify_operations *ops) mutex_init(&ih->mutex); ih->last_wd = 0; ih->in_ops = ops; + ih->uid = current->user->uid; + ih->flags = 0; + if (capable(CAP_SYS_ADMIN)) + ih->flags |= IH_FLAGS_ADMIN; atomic_set(&ih->count, 0); get_inotify_handle(ih); -- Evgeniy Polyakov -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html