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authorAmir Goldstein <amir73il@gmail.com>2019-01-10 19:04:33 +0200
committerJan Kara <jack@suse.cz>2019-02-07 16:37:01 +0100
commitbb2f7b4542c7a1d023d516af37dc70bb49db0438 (patch)
tree9afb110f7e14bf9fbdd4c01226714e8a66ec3227 /fs/notify
parent33913997d5c06781c162952c6e5017131fc5aa19 (diff)
downloadlinux-stericsson-bb2f7b4542c7a1d023d516af37dc70bb49db0438.tar.gz
fanotify: open code fill_event_metadata()
The helper is quite trivial and open coding it will make it easier to implement copying event fid info to user. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify_user.c71
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) {