From 84a5b68e8da1490906c11129756490a556ae2c19 Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Wed, 28 Jul 2010 10:18:39 -0400 Subject: [PATCH] fsnotify: rework ignored mark flushing currently ignored_mark clearing is done in a seperate list traversal before the actual list traversal to send events. There is no need for this. Do them at the same time. Signed-off-by: Eric Paris --- fs/notify/fsnotify.c | 60 ++++++++------------------------------------ 1 file changed, 11 insertions(+), 49 deletions(-) diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index 1dd1fde1da0..0bb4aeb8e00 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -140,36 +140,6 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask) } EXPORT_SYMBOL_GPL(__fsnotify_parent); -void __fsnotify_flush_ignored_mask(struct inode *inode, void *data, int data_is) -{ - struct fsnotify_mark *mark; - struct hlist_node *node; - int idx; - - idx = srcu_read_lock(&fsnotify_mark_srcu); - - if (!hlist_empty(&inode->i_fsnotify_marks)) { - hlist_for_each_entry_rcu(mark, node, &inode->i_fsnotify_marks, i.i_list) { - if (!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)) - mark->ignored_mask = 0; - } - } - - if (data_is == FSNOTIFY_EVENT_FILE) { - struct vfsmount *mnt; - - mnt = ((struct file *)data)->f_path.mnt; - if (mnt && !hlist_empty(&mnt->mnt_fsnotify_marks)) { - hlist_for_each_entry_rcu(mark, node, &mnt->mnt_fsnotify_marks, m.m_list) { - if (!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)) - mark->ignored_mask = 0; - } - } - } - - srcu_read_unlock(&fsnotify_mark_srcu, idx); -} - static int send_to_group(struct fsnotify_group *group, struct inode *to_tell, struct vfsmount *mnt, struct fsnotify_mark *mark, __u32 mask, void *data, int data_is, u32 cookie, @@ -193,14 +163,6 @@ static int send_to_group(struct fsnotify_group *group, struct inode *to_tell, return group->ops->handle_event(group, mark, *event); } -static bool needed_by_vfsmount(__u32 test_mask, struct vfsmount *mnt) -{ - if (!mnt) - return false; - - return (test_mask & mnt->mnt_fsnotify_mask); -} - /* * This is the main call to fsnotify. The VFS calls into hook specific functions * in linux/fsnotify.h. Those functions then in turn call here. Here will call @@ -219,26 +181,21 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, /* global tests shouldn't care about events on child only the specific event */ __u32 test_mask = (mask & ~FS_EVENT_ON_CHILD); - if (mask & FS_MODIFY) - __fsnotify_flush_ignored_mask(to_tell, data, data_is); - if (data_is == FSNOTIFY_EVENT_FILE) mnt = ((struct file *)data)->f_path.mnt; - /* if this inode's directed listeners don't care and nothing on the vfsmount - * listeners list cares, nothing to do */ - if (!(test_mask & to_tell->i_fsnotify_mask) && - !needed_by_vfsmount(test_mask, mnt)) - return 0; - idx = srcu_read_lock(&fsnotify_mark_srcu); - if (test_mask & to_tell->i_fsnotify_mask) { + if ((test_mask & to_tell->i_fsnotify_mask) || (mask & FS_MODIFY)) { hlist_for_each_entry_rcu(mark, node, &to_tell->i_fsnotify_marks, i.i_list) { pr_debug("%s: inode_loop: mark=%p mark->mask=%x mark->ignored_mask=%x\n", __func__, mark, mark->mask, mark->ignored_mask); + if ((mask & FS_MODIFY) && + !(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)) + mark->ignored_mask = 0; + if (test_mask & mark->mask & ~mark->ignored_mask) { group = mark->group; if (!group) @@ -252,12 +209,17 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, } } - if (mnt && (test_mask & mnt->mnt_fsnotify_mask)) { + if (mnt && ((test_mask & mnt->mnt_fsnotify_mask) || + (mask & FS_MODIFY))) { hlist_for_each_entry_rcu(mark, node, &mnt->mnt_fsnotify_marks, m.m_list) { pr_debug("%s: mnt_loop: mark=%p mark->mask=%x mark->ignored_mask=%x\n", __func__, mark, mark->mask, mark->ignored_mask); + if ((mask & FS_MODIFY) && + !(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)) + mark->ignored_mask = 0; + if (test_mask & mark->mask & ~mark->ignored_mask) { group = mark->group; if (!group) -- 2.39.3