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| author | Jan Kara <jack@suse.cz> | 2016-11-10 18:02:11 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2017-04-10 18:37:36 +0300 |
| commit | abc77577a669f424c5d0c185b9994f2621c52aa4 (patch) | |
| tree | a7e18bc2c8229a8a634d899445c33958f8967876 /fs/notify/fsnotify.h | |
| parent | f09b04a03e0239f65bd964a1de758e53cf6349e8 (diff) | |
| download | linux-abc77577a669f424c5d0c185b9994f2621c52aa4.tar.xz | |
fsnotify: Provide framework for dropping SRCU lock in ->handle_event
fanotify wants to drop fsnotify_mark_srcu lock when waiting for response
from userspace so that the whole notification subsystem is not blocked
during that time. This patch provides a framework for safely getting
mark reference for a mark found in the object list which pins the mark
in that list. We can then drop fsnotify_mark_srcu, wait for userspace
response and then safely continue iteration of the object list once we
reaquire fsnotify_mark_srcu.
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/fsnotify.h')
| -rw-r--r-- | fs/notify/fsnotify.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h index 2a92dc06198c..86383c7865c0 100644 --- a/fs/notify/fsnotify.h +++ b/fs/notify/fsnotify.h @@ -8,6 +8,12 @@ #include "../mount.h" +struct fsnotify_iter_info { + struct fsnotify_mark *inode_mark; + struct fsnotify_mark *vfsmount_mark; + int srcu_idx; +}; + /* destroy all events sitting in this groups notification queue */ extern void fsnotify_flush_notify(struct fsnotify_group *group); |