diff options
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 71 |
1 files changed, 27 insertions, 44 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 55cd87b0cc26..096503bd0edb 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -114,36 +114,6 @@ static int create_fd(struct fsnotify_group *group, return client_fd; } -static int fill_event_metadata(struct fsnotify_group *group, - struct fanotify_event_metadata *metadata, - struct fsnotify_event *fsn_event, - struct file **file) -{ - int ret = 0; - struct fanotify_event *event; - - pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, - group, metadata, fsn_event); - - *file = NULL; - event = container_of(fsn_event, struct fanotify_event, fse); - metadata->event_len = FAN_EVENT_METADATA_LEN; - metadata->metadata_len = FAN_EVENT_METADATA_LEN; - metadata->vers = FANOTIFY_METADATA_VERSION; - metadata->reserved = 0; - metadata->mask = event->mask & FANOTIFY_OUTGOING_EVENTS; - metadata->pid = pid_vnr(event->pid); - if (unlikely(event->mask & FAN_Q_OVERFLOW)) - metadata->fd = FAN_NOFD; - else { - metadata->fd = create_fd(group, event, file); - if (metadata->fd < 0) - ret = metadata->fd; - } - - return ret; -} - static struct fanotify_perm_event *dequeue_event( struct fsnotify_group *group, int fd) { @@ -205,37 +175,50 @@ static int process_access_response(struct fsnotify_group *group, } static ssize_t copy_event_to_user(struct fsnotify_group *group, - struct fsnotify_event *event, + struct fsnotify_event *fsn_event, char __user *buf, size_t count) { - struct fanotify_event_metadata fanotify_event_metadata; - struct file *f; + struct fanotify_event_metadata metadata; + struct fanotify_event *event; + struct file *f = NULL; int fd, ret; - pr_debug("%s: group=%p event=%p\n", __func__, group, event); + pr_debug("%s: group=%p event=%p\n", __func__, group, fsn_event); - ret = fill_event_metadata(group, &fanotify_event_metadata, event, &f); - if (ret < 0) - return ret; + event = container_of(fsn_event, struct fanotify_event, fse); + metadata.event_len = FAN_EVENT_METADATA_LEN; + metadata.metadata_len = FAN_EVENT_METADATA_LEN; + metadata.vers = FANOTIFY_METADATA_VERSION; + metadata.reserved = 0; + metadata.mask = event->mask & FANOTIFY_OUTGOING_EVENTS; + metadata.pid = pid_vnr(event->pid); + + if (unlikely(event->mask & FAN_Q_OVERFLOW)) { + fd = FAN_NOFD; + } else { + fd = create_fd(group, event, &f); + if (fd < 0) + return fd; + } + metadata.fd = fd; - fd = fanotify_event_metadata.fd; ret = -EFAULT; /* * Sanity check copy size in case get_one_event() and * fill_event_metadata() event_len sizes ever get out of sync. */ - if (WARN_ON_ONCE(fanotify_event_metadata.event_len > count)) + if (WARN_ON_ONCE(metadata.event_len > count)) goto out_close_fd; - if (copy_to_user(buf, &fanotify_event_metadata, - fanotify_event_metadata.event_len)) + + if (copy_to_user(buf, &metadata, metadata.event_len)) goto out_close_fd; - if (fanotify_is_perm_event(FANOTIFY_E(event)->mask)) - FANOTIFY_PE(event)->fd = fd; + if (fanotify_is_perm_event(event->mask)) + FANOTIFY_PE(fsn_event)->fd = fd; if (fd != FAN_NOFD) fd_install(fd, f); - return fanotify_event_metadata.event_len; + return metadata.event_len; out_close_fd: if (fd != FAN_NOFD) { |