From 4bd5a5c8e6e5cd964e9738e6ef87f6c2cb453edf Mon Sep 17 00:00:00 2001 From: Gabriel Krisman Bertazi Date: Mon, 25 Oct 2021 16:27:38 -0300 Subject: [PATCH] fanotify: Add helpers to decide whether to report FID/DFID Now that there is an event that reports FID records even for a zeroed file handle, wrap the logic that deides whether to issue the records into helper functions. This shouldn't have any impact on the code, but simplifies further patches. Link: https://lore.kernel.org/r/20211025192746.66445-24-krisman@collabora.com Reviewed-by: Jan Kara Signed-off-by: Gabriel Krisman Bertazi Reviewed-by: Amir Goldstein Signed-off-by: Jan Kara --- fs/notify/fanotify/fanotify.h | 10 ++++++++++ fs/notify/fanotify/fanotify_user.c | 13 +++++++------ 2 files changed, 17 insertions(+), 6 deletions(-) diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h index 3510d06654ed..80af269eebb8 100644 --- a/fs/notify/fanotify/fanotify.h +++ b/fs/notify/fanotify/fanotify.h @@ -264,6 +264,16 @@ static inline int fanotify_event_dir_fh_len(struct fanotify_event *event) return info ? fanotify_info_dir_fh_len(info) : 0; } +static inline bool fanotify_event_has_object_fh(struct fanotify_event *event) +{ + return fanotify_event_object_fh_len(event) > 0; +} + +static inline bool fanotify_event_has_dir_fh(struct fanotify_event *event) +{ + return fanotify_event_dir_fh_len(event) > 0; +} + struct fanotify_path_event { struct fanotify_event fae; struct path path; diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 2f4182b754b2..a9b5c36ee49e 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -140,10 +140,9 @@ static size_t fanotify_event_len(unsigned int info_mode, return event_len; info = fanotify_event_info(event); - dir_fh_len = fanotify_event_dir_fh_len(event); - fh_len = fanotify_event_object_fh_len(event); - if (dir_fh_len) { + if (fanotify_event_has_dir_fh(event)) { + dir_fh_len = fanotify_event_dir_fh_len(event); event_len += fanotify_fid_info_len(dir_fh_len, info->name_len); } else if ((info_mode & FAN_REPORT_NAME) && (event->mask & FAN_ONDIR)) { @@ -157,8 +156,10 @@ static size_t fanotify_event_len(unsigned int info_mode, if (info_mode & FAN_REPORT_PIDFD) event_len += FANOTIFY_PIDFD_INFO_HDR_LEN; - if (fh_len) + if (fanotify_event_has_object_fh(event)) { + fh_len = fanotify_event_object_fh_len(event); event_len += fanotify_fid_info_len(fh_len, dot_len); + } return event_len; } @@ -451,7 +452,7 @@ static int copy_info_records_to_user(struct fanotify_event *event, /* * Event info records order is as follows: dir fid + name, child fid. */ - if (fanotify_event_dir_fh_len(event)) { + if (fanotify_event_has_dir_fh(event)) { info_type = info->name_len ? FAN_EVENT_INFO_TYPE_DFID_NAME : FAN_EVENT_INFO_TYPE_DFID; ret = copy_fid_info_to_user(fanotify_event_fsid(event), @@ -467,7 +468,7 @@ static int copy_info_records_to_user(struct fanotify_event *event, total_bytes += ret; } - if (fanotify_event_object_fh_len(event)) { + if (fanotify_event_has_object_fh(event)) { const char *dot = NULL; int dot_len = 0;