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author | Tejun Heo <tj@kernel.org> | 2015-12-07 10:09:03 -0500 |
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committer | Tejun Heo <tj@kernel.org> | 2015-12-07 10:09:03 -0500 |
commit | 0b98f0c04245877ae0b625a7f0aa55b8ff98e0c4 (patch) | |
tree | 486ebe0d76217a4f7781e28fbd96facb0b66f9da /net/core/netclassid_cgroup.c | |
parent | 67cde9c4938945b9510730c64e68d2f1dd7bc0aa (diff) | |
parent | 527e9316f8ec44bd53d90fb9f611fa7ffff52bb9 (diff) | |
download | op-kernel-dev-0b98f0c04245877ae0b625a7f0aa55b8ff98e0c4.zip op-kernel-dev-0b98f0c04245877ae0b625a7f0aa55b8ff98e0c4.tar.gz |
Merge branch 'master' into for-4.4-fixes
The following commit which went into mainline through networking tree
3b13758f51de ("cgroups: Allow dynamically changing net_classid")
conflicts in net/core/netclassid_cgroup.c with the following pending
fix in cgroup/for-4.4-fixes.
1f7dd3e5a6e4 ("cgroup: fix handling of multi-destination migration from subtree_control enabling")
The former separates out update_classid() from cgrp_attach() and
updates it to walk all fds of all tasks in the target css so that it
can be used from both migration and config change paths. The latter
drops @css from cgrp_attach().
Resolve the conflict by making cgrp_attach() call update_classid()
with the css from the first task. We can revive @tset walking in
cgrp_attach() but given that net_cls is v1 only where there always is
only one target css during migration, this is fine.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Nina Schiff <ninasc@fb.com>
Diffstat (limited to 'net/core/netclassid_cgroup.c')
-rw-r--r-- | net/core/netclassid_cgroup.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c index 81cb3c7..d9ee8d0 100644 --- a/net/core/netclassid_cgroup.c +++ b/net/core/netclassid_cgroup.c @@ -56,7 +56,7 @@ static void cgrp_css_free(struct cgroup_subsys_state *css) kfree(css_cls_state(css)); } -static int update_classid(const void *v, struct file *file, unsigned n) +static int update_classid_sock(const void *v, struct file *file, unsigned n) { int err; struct socket *sock = sock_from_file(file, &err); @@ -67,19 +67,27 @@ static int update_classid(const void *v, struct file *file, unsigned n) return 0; } -static void cgrp_attach(struct cgroup_taskset *tset) +static void update_classid(struct cgroup_subsys_state *css, void *v) { + struct css_task_iter it; struct task_struct *p; - struct cgroup_subsys_state *css; - - cgroup_taskset_for_each(p, css, tset) { - struct cgroup_cls_state *cs = css_cls_state(css); - void *v = (void *)(unsigned long)cs->classid; + css_task_iter_start(css, &it); + while ((p = css_task_iter_next(&it))) { task_lock(p); - iterate_fd(p->files, 0, update_classid, v); + iterate_fd(p->files, 0, update_classid_sock, v); task_unlock(p); } + css_task_iter_end(&it); +} + +static void cgrp_attach(struct cgroup_taskset *tset) +{ + struct cgroup_subsys_state *css; + + cgroup_taskset_first(tset, &css); + update_classid(css, + (void *)(unsigned long)css_cls_state(css)->classid); } static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft) @@ -90,8 +98,11 @@ static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft) static int write_classid(struct cgroup_subsys_state *css, struct cftype *cft, u64 value) { - css_cls_state(css)->classid = (u32) value; + struct cgroup_cls_state *cs = css_cls_state(css); + + cs->classid = (u32)value; + update_classid(css, (void *)(unsigned long)cs->classid); return 0; } |