Thread (61 messages) 61 messages, 4 authors, 2021-10-18

Re: [PATCH v7 11/28] fsnotify: Pass group argument to free_event

From: Amir Goldstein <amir73il@gmail.com>
Date: 2021-10-15 05:41:08
Also in: linux-api, linux-fsdevel

On Fri, Oct 15, 2021 at 12:38 AM Gabriel Krisman Bertazi
[off-list ref] wrote:
For group-wide mempool backed events, like FS_ERROR, the free_event
callback will need to reference the group's mempool to free the memory.
Wire that argument into the current callers.

Signed-off-by: Gabriel Krisman Bertazi <redacted>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
quoted hunk ↗ jump to hunk
---
 fs/notify/fanotify/fanotify.c        | 3 ++-
 fs/notify/group.c                    | 2 +-
 fs/notify/inotify/inotify_fsnotify.c | 3 ++-
 fs/notify/notification.c             | 2 +-
 include/linux/fsnotify_backend.h     | 2 +-
 5 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index f82e20228999..c620b4f6fe12 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -835,7 +835,8 @@ static void fanotify_free_name_event(struct fanotify_event *event)
        kfree(FANOTIFY_NE(event));
 }

-static void fanotify_free_event(struct fsnotify_event *fsn_event)
+static void fanotify_free_event(struct fsnotify_group *group,
+                               struct fsnotify_event *fsn_event)
 {
        struct fanotify_event *event;
diff --git a/fs/notify/group.c b/fs/notify/group.c
index fb89c351295d..6a297efc4788 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -88,7 +88,7 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
         * that deliberately ignores overflow events.
         */
        if (group->overflow_event)
-               group->ops->free_event(group->overflow_event);
+               group->ops->free_event(group, group->overflow_event);

        fsnotify_put_group(group);
 }
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index a96582cbfad1..d92d7b0adc9a 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -177,7 +177,8 @@ static void inotify_free_group_priv(struct fsnotify_group *group)
                dec_inotify_instances(group->inotify_data.ucounts);
 }

-static void inotify_free_event(struct fsnotify_event *fsn_event)
+static void inotify_free_event(struct fsnotify_group *group,
+                              struct fsnotify_event *fsn_event)
 {
        kfree(INOTIFY_E(fsn_event));
 }
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 44bb10f50715..9022ae650cf8 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -64,7 +64,7 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
                WARN_ON(!list_empty(&event->list));
                spin_unlock(&group->notification_lock);
        }
-       group->ops->free_event(event);
+       group->ops->free_event(group, event);
 }

 /*
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 035438fe4a43..1e69e9fe45c9 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -155,7 +155,7 @@ struct fsnotify_ops {
                            const struct qstr *file_name, u32 cookie);
        void (*free_group_priv)(struct fsnotify_group *group);
        void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
-       void (*free_event)(struct fsnotify_event *event);
+       void (*free_event)(struct fsnotify_group *group, struct fsnotify_event *event);
        /* called on final put+free to free memory */
        void (*free_mark)(struct fsnotify_mark *mark);
 };
--
2.33.0
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