diff options
Diffstat (limited to 'include/linux/fsnotify.h')
| -rw-r--r-- | include/linux/fsnotify.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h index 8d1849137a96..d91aa064f0e4 100644 --- a/include/linux/fsnotify.h +++ b/include/linux/fsnotify.h @@ -144,12 +144,29 @@ static inline int fsnotify_file_area_perm(struct file *file, int perm_mask, */ lockdep_assert_once(file_write_not_started(file)); - if (!(perm_mask & MAY_READ)) + if (!(perm_mask & (MAY_READ | MAY_WRITE | MAY_ACCESS))) return 0; if (likely(!FMODE_FSNOTIFY_PERM(file->f_mode))) return 0; + /* + * read()/write() and other types of access generate pre-content events. + */ + if (unlikely(FMODE_FSNOTIFY_HSM(file->f_mode))) { + int ret = fsnotify_path(&file->f_path, FS_PRE_ACCESS); + + if (ret) + return ret; + } + + if (!(perm_mask & MAY_READ)) + return 0; + + /* + * read() also generates the legacy FS_ACCESS_PERM event, so content + * scanners can inspect the content filled by pre-content event. + */ return fsnotify_path(&file->f_path, FS_ACCESS_PERM); } |