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| author |   Oleg Nesterov <oleg@redhat.com> | 2012-11-24 18:15:46 +0100 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-02-08 17:47:05 +0100 |
| commit | 1ff6fee5e62c57d5923b805bb4206acb7953f16e (patch) | |
| tree | 1b573238a506824e34d19b7ae5cba604d00f7b5c /kernel/events | |
| parent | uprobes: Introduce uprobe->register_rwsem (diff) | |
| download | linux-dev-1ff6fee5e62c57d5923b805bb4206acb7953f16e.tar.xz linux-dev-1ff6fee5e62c57d5923b805bb4206acb7953f16e.zip | |
uprobes: Change filter_chain() to iterate ->consumers list
Now that it safe to use ->consumer_rwsem under ->mmap_sem we can
almost finish the implementation of filter_chain(). It still lacks
the actual uc->filter(...) call but othewrwise it is ready, just
it pretends that ->filter() always returns true.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/uprobes.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 61d0fa6b5012..4d0452363686 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -614,14 +614,19 @@ static int prepare_uprobe(struct uprobe *uprobe, struct file *file, static bool filter_chain(struct uprobe *uprobe) { - /* - * TODO: - * for_each_consumer(uc) - * if (uc->filter(...)) - * return true; - * return false; - */ - return uprobe->consumers != NULL; + struct uprobe_consumer *uc; + bool ret = false; + + down_read(&uprobe->consumer_rwsem); + for (uc = uprobe->consumers; uc; uc = uc->next) { + /* TODO: ret = uc->filter(...) */ + ret = true; + if (ret) + break; + } + up_read(&uprobe->consumer_rwsem); + + return ret; } static int |