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authorAmir Goldstein <amir73il@gmail.com>2020-07-08 14:11:37 +0300
committerJan Kara <jack@suse.cz>2020-07-15 18:36:41 +0300
commitc738fbabb0ff62d0f9a9572e56e65d05a1b34c6a (patch)
tree3bd2d3996e88cfe74a51e4403ef67108365de1b6 /fs/notify
parent71d734103edfa2b4c6657578a3082ee0e51d767e (diff)
downloadlinux-c738fbabb0ff62d0f9a9572e56e65d05a1b34c6a.tar.xz
fsnotify: fold fsnotify() call into fsnotify_parent()
All (two) callers of fsnotify_parent() also call fsnotify() to notify the child inode. Move the second fsnotify() call into fsnotify_parent(). This will allow more flexibility in making decisions about which of the two event falvors should be sent. Using 'goto notify_child' in the inline helper seems a bit strange, but it mimics the code in __fsnotify_parent() for clarity and the goto pattern will become less strage after following patches are applied. Link: https://lore.kernel.org/r/20200708111156.24659-2-amir73il@gmail.com 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/fsnotify.c27
1 files changed, 18 insertions, 9 deletions
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index d59a58d10b84..30628a72ca01 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -142,16 +142,20 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
spin_unlock(&inode->i_lock);
}
-/* Notify this dentry's parent about a child's events. */
+/*
+ * Notify this dentry's parent about a child's events with child name info
+ * if parent is watching.
+ * Notify also the child without name info if child inode is watching.
+ */
int __fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
- int data_type)
+ int data_type)
{
struct dentry *parent;
struct inode *p_inode;
int ret = 0;
if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
- return 0;
+ goto notify_child;
parent = dget_parent(dentry);
p_inode = parent->d_inode;
@@ -161,18 +165,23 @@ int __fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
} else if (p_inode->i_fsnotify_mask & mask & ALL_FSNOTIFY_EVENTS) {
struct name_snapshot name;
- /* we are notifying a parent so come up with the new mask which
- * specifies these are events which came from a child. */
- mask |= FS_EVENT_ON_CHILD;
-
+ /*
+ * We are notifying a parent, so set a flag in mask to inform
+ * backend that event has information about a child entry.
+ */
take_dentry_name_snapshot(&name, dentry);
- ret = fsnotify(p_inode, mask, data, data_type, &name.name, 0);
+ ret = fsnotify(p_inode, mask | FS_EVENT_ON_CHILD, data,
+ data_type, &name.name, 0);
release_dentry_name_snapshot(&name);
}
dput(parent);
- return ret;
+ if (ret)
+ return ret;
+
+notify_child:
+ return fsnotify(d_inode(dentry), mask, data, data_type, NULL, 0);
}
EXPORT_SYMBOL_GPL(__fsnotify_parent);