net: drop tcp_memcontrol.c
tcp_memcontrol.c only contains legacy memory.tcp.kmem.* file definitions and mem_cgroup->tcp_mem init/destroy stuff. This doesn't belong to network subsys. Let's move it to memcontrol.c. This also allows us to reuse generic code for handling legacy memcg files. Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>hifive-unleashed-5.1
parent
489c2a20a4
commit
d55f90bfab
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@ -1,10 +0,0 @@
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#ifndef _TCP_MEMCG_H
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#define _TCP_MEMCG_H
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struct cgroup_subsys;
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struct mem_cgroup;
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int tcp_init_cgroup(struct mem_cgroup *memcg);
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void tcp_destroy_cgroup(struct mem_cgroup *memcg);
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#endif /* _TCP_MEMCG_H */
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@ -66,7 +66,6 @@
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#include "internal.h"
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#include "internal.h"
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#include <net/sock.h>
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#include <net/sock.h>
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#include <net/ip.h>
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#include <net/ip.h>
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#include <net/tcp_memcontrol.h>
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#include "slab.h"
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#include "slab.h"
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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@ -242,6 +241,7 @@ enum res_type {
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_MEMSWAP,
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_MEMSWAP,
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_OOM_TYPE,
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_OOM_TYPE,
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_KMEM,
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_KMEM,
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_TCP,
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};
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};
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#define MEMFILE_PRIVATE(x, val) ((x) << 16 | (val))
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#define MEMFILE_PRIVATE(x, val) ((x) << 16 | (val))
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@ -2842,6 +2842,11 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css,
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case _KMEM:
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case _KMEM:
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counter = &memcg->kmem;
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counter = &memcg->kmem;
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break;
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break;
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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case _TCP:
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counter = &memcg->tcp_mem.memory_allocated;
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break;
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#endif
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default:
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default:
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BUG();
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BUG();
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}
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}
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@ -3028,6 +3033,48 @@ static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
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#endif /* CONFIG_MEMCG_LEGACY_KMEM */
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#endif /* CONFIG_MEMCG_LEGACY_KMEM */
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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static int memcg_update_tcp_limit(struct mem_cgroup *memcg, unsigned long limit)
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{
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int ret;
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mutex_lock(&memcg_limit_mutex);
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ret = page_counter_limit(&memcg->tcp_mem.memory_allocated, limit);
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if (ret)
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goto out;
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if (!memcg->tcp_mem.active) {
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/*
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* The active flag needs to be written after the static_key
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* update. This is what guarantees that the socket activation
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* function is the last one to run. See sock_update_memcg() for
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* details, and note that we don't mark any socket as belonging
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* to this memcg until that flag is up.
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*
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* We need to do this, because static_keys will span multiple
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* sites, but we can't control their order. If we mark a socket
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* as accounted, but the accounting functions are not patched in
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* yet, we'll lose accounting.
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*
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* We never race with the readers in sock_update_memcg(),
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* because when this value change, the code to process it is not
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* patched in yet.
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*/
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static_branch_inc(&memcg_sockets_enabled_key);
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memcg->tcp_mem.active = true;
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}
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out:
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mutex_unlock(&memcg_limit_mutex);
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return ret;
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}
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#else
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static int memcg_update_tcp_limit(struct mem_cgroup *memcg, unsigned long limit)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_MEMCG_LEGACY_KMEM && CONFIG_INET */
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/*
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/*
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* The user of this function is...
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* The user of this function is...
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* RES_LIMIT.
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* RES_LIMIT.
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@ -3060,6 +3107,9 @@ static ssize_t mem_cgroup_write(struct kernfs_open_file *of,
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case _KMEM:
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case _KMEM:
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ret = memcg_update_kmem_limit(memcg, nr_pages);
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ret = memcg_update_kmem_limit(memcg, nr_pages);
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break;
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break;
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case _TCP:
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ret = memcg_update_tcp_limit(memcg, nr_pages);
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break;
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}
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}
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break;
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break;
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case RES_SOFT_LIMIT:
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case RES_SOFT_LIMIT:
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@ -3086,6 +3136,11 @@ static ssize_t mem_cgroup_reset(struct kernfs_open_file *of, char *buf,
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case _KMEM:
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case _KMEM:
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counter = &memcg->kmem;
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counter = &memcg->kmem;
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break;
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break;
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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case _TCP:
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counter = &memcg->tcp_mem.memory_allocated;
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break;
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#endif
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default:
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default:
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BUG();
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BUG();
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}
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}
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@ -4072,6 +4127,31 @@ static struct cftype mem_cgroup_legacy_files[] = {
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.seq_show = memcg_slab_show,
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.seq_show = memcg_slab_show,
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},
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},
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#endif
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#endif
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#ifdef CONFIG_INET
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{
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.name = "kmem.tcp.limit_in_bytes",
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.private = MEMFILE_PRIVATE(_TCP, RES_LIMIT),
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.write = mem_cgroup_write,
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.read_u64 = mem_cgroup_read_u64,
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},
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{
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.name = "kmem.tcp.usage_in_bytes",
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.private = MEMFILE_PRIVATE(_TCP, RES_USAGE),
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.read_u64 = mem_cgroup_read_u64,
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},
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{
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.name = "kmem.tcp.failcnt",
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.private = MEMFILE_PRIVATE(_TCP, RES_FAILCNT),
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.write = mem_cgroup_reset,
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.read_u64 = mem_cgroup_read_u64,
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},
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{
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.name = "kmem.tcp.max_usage_in_bytes",
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.private = MEMFILE_PRIVATE(_TCP, RES_MAX_USAGE),
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.write = mem_cgroup_reset,
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.read_u64 = mem_cgroup_read_u64,
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},
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#endif
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#endif
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#endif
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{ }, /* terminate */
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{ }, /* terminate */
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};
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};
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@ -4241,6 +4321,10 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
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memcg->soft_limit = PAGE_COUNTER_MAX;
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memcg->soft_limit = PAGE_COUNTER_MAX;
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page_counter_init(&memcg->memsw, &parent->memsw);
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page_counter_init(&memcg->memsw, &parent->memsw);
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page_counter_init(&memcg->kmem, &parent->kmem);
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page_counter_init(&memcg->kmem, &parent->kmem);
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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page_counter_init(&memcg->tcp_mem.memory_allocated,
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&parent->tcp_mem.memory_allocated);
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#endif
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/*
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/*
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* No need to take a reference to the parent because cgroup
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* No need to take a reference to the parent because cgroup
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@ -4252,6 +4336,9 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
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memcg->soft_limit = PAGE_COUNTER_MAX;
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memcg->soft_limit = PAGE_COUNTER_MAX;
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page_counter_init(&memcg->memsw, NULL);
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page_counter_init(&memcg->memsw, NULL);
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page_counter_init(&memcg->kmem, NULL);
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page_counter_init(&memcg->kmem, NULL);
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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page_counter_init(&memcg->tcp_mem.memory_allocated, NULL);
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#endif
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/*
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/*
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* Deeper hierachy with use_hierarchy == false doesn't make
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* Deeper hierachy with use_hierarchy == false doesn't make
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* much sense so let cgroup subsystem know about this
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* much sense so let cgroup subsystem know about this
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@ -4267,12 +4354,6 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
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return ret;
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return ret;
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#ifdef CONFIG_INET
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#ifdef CONFIG_INET
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#ifdef CONFIG_MEMCG_LEGACY_KMEM
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ret = tcp_init_cgroup(memcg);
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if (ret)
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return ret;
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#endif
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if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
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if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
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static_branch_inc(&memcg_sockets_enabled_key);
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static_branch_inc(&memcg_sockets_enabled_key);
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#endif
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#endif
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@ -4330,7 +4411,8 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
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memcg_free_kmem(memcg);
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memcg_free_kmem(memcg);
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
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tcp_destroy_cgroup(memcg);
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if (memcg->tcp_mem.active)
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static_branch_dec(&memcg_sockets_enabled_key);
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#endif
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#endif
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__mem_cgroup_free(memcg);
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__mem_cgroup_free(memcg);
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@ -56,7 +56,6 @@ obj-$(CONFIG_TCP_CONG_SCALABLE) += tcp_scalable.o
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obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o
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obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o
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obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o
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obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o
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obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o
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obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o
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obj-$(CONFIG_MEMCG_LEGACY_KMEM) += tcp_memcontrol.o
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obj-$(CONFIG_NETLABEL) += cipso_ipv4.o
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obj-$(CONFIG_NETLABEL) += cipso_ipv4.o
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obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \
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obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \
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@ -24,7 +24,6 @@
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#include <net/cipso_ipv4.h>
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#include <net/cipso_ipv4.h>
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#include <net/inet_frag.h>
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#include <net/inet_frag.h>
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#include <net/ping.h>
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#include <net/ping.h>
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#include <net/tcp_memcontrol.h>
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static int zero;
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static int zero;
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static int one = 1;
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static int one = 1;
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@ -73,7 +73,6 @@
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#include <net/timewait_sock.h>
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#include <net/timewait_sock.h>
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#include <net/xfrm.h>
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#include <net/xfrm.h>
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#include <net/secure_seq.h>
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#include <net/secure_seq.h>
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#include <net/tcp_memcontrol.h>
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#include <net/busy_poll.h>
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#include <net/busy_poll.h>
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#include <linux/inet.h>
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#include <linux/inet.h>
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@ -1,200 +0,0 @@
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#include <net/tcp.h>
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#include <net/tcp_memcontrol.h>
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#include <net/sock.h>
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#include <net/ip.h>
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#include <linux/nsproxy.h>
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#include <linux/memcontrol.h>
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#include <linux/module.h>
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int tcp_init_cgroup(struct mem_cgroup *memcg)
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{
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struct mem_cgroup *parent = parent_mem_cgroup(memcg);
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struct page_counter *counter_parent = NULL;
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/*
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* The root cgroup does not use page_counters, but rather,
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* rely on the data already collected by the network
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* subsystem
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*/
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if (memcg == root_mem_cgroup)
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return 0;
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memcg->tcp_mem.memory_pressure = 0;
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if (parent)
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counter_parent = &parent->tcp_mem.memory_allocated;
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page_counter_init(&memcg->tcp_mem.memory_allocated, counter_parent);
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return 0;
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}
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void tcp_destroy_cgroup(struct mem_cgroup *memcg)
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{
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if (memcg == root_mem_cgroup)
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return;
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if (memcg->tcp_mem.active)
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static_branch_dec(&memcg_sockets_enabled_key);
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}
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static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
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{
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int ret;
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if (memcg == root_mem_cgroup)
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return -EINVAL;
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ret = page_counter_limit(&memcg->tcp_mem.memory_allocated, nr_pages);
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if (ret)
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return ret;
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if (!memcg->tcp_mem.active) {
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/*
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* The active flag needs to be written after the static_key
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* update. This is what guarantees that the socket activation
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* function is the last one to run. See sock_update_memcg() for
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* details, and note that we don't mark any socket as belonging
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* to this memcg until that flag is up.
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*
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* We need to do this, because static_keys will span multiple
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* sites, but we can't control their order. If we mark a socket
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* as accounted, but the accounting functions are not patched in
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* yet, we'll lose accounting.
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*
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* We never race with the readers in sock_update_memcg(),
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* because when this value change, the code to process it is not
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* patched in yet.
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*/
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static_branch_inc(&memcg_sockets_enabled_key);
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memcg->tcp_mem.active = true;
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}
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return 0;
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}
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enum {
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RES_USAGE,
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RES_LIMIT,
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RES_MAX_USAGE,
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RES_FAILCNT,
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};
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static DEFINE_MUTEX(tcp_limit_mutex);
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static ssize_t tcp_cgroup_write(struct kernfs_open_file *of,
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char *buf, size_t nbytes, loff_t off)
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{
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struct mem_cgroup *memcg = mem_cgroup_from_css(of_css(of));
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unsigned long nr_pages;
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int ret = 0;
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buf = strstrip(buf);
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switch (of_cft(of)->private) {
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case RES_LIMIT:
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/* see memcontrol.c */
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ret = page_counter_memparse(buf, "-1", &nr_pages);
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if (ret)
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break;
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mutex_lock(&tcp_limit_mutex);
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ret = tcp_update_limit(memcg, nr_pages);
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mutex_unlock(&tcp_limit_mutex);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret ?: nbytes;
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}
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static u64 tcp_cgroup_read(struct cgroup_subsys_state *css, struct cftype *cft)
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{
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struct mem_cgroup *memcg = mem_cgroup_from_css(css);
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u64 val;
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switch (cft->private) {
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case RES_LIMIT:
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if (memcg == root_mem_cgroup)
|
|
||||||
val = PAGE_COUNTER_MAX;
|
|
||||||
else
|
|
||||||
val = memcg->tcp_mem.memory_allocated.limit;
|
|
||||||
val *= PAGE_SIZE;
|
|
||||||
break;
|
|
||||||
case RES_USAGE:
|
|
||||||
if (memcg == root_mem_cgroup)
|
|
||||||
val = atomic_long_read(&tcp_memory_allocated);
|
|
||||||
else
|
|
||||||
val = page_counter_read(&memcg->tcp_mem.memory_allocated);
|
|
||||||
val *= PAGE_SIZE;
|
|
||||||
break;
|
|
||||||
case RES_FAILCNT:
|
|
||||||
if (memcg == root_mem_cgroup)
|
|
||||||
return 0;
|
|
||||||
val = memcg->tcp_mem.memory_allocated.failcnt;
|
|
||||||
break;
|
|
||||||
case RES_MAX_USAGE:
|
|
||||||
if (memcg == root_mem_cgroup)
|
|
||||||
return 0;
|
|
||||||
val = memcg->tcp_mem.memory_allocated.watermark;
|
|
||||||
val *= PAGE_SIZE;
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
BUG();
|
|
||||||
}
|
|
||||||
return val;
|
|
||||||
}
|
|
||||||
|
|
||||||
static ssize_t tcp_cgroup_reset(struct kernfs_open_file *of,
|
|
||||||
char *buf, size_t nbytes, loff_t off)
|
|
||||||
{
|
|
||||||
struct mem_cgroup *memcg;
|
|
||||||
|
|
||||||
memcg = mem_cgroup_from_css(of_css(of));
|
|
||||||
if (memcg == root_mem_cgroup)
|
|
||||||
return nbytes;
|
|
||||||
|
|
||||||
switch (of_cft(of)->private) {
|
|
||||||
case RES_MAX_USAGE:
|
|
||||||
page_counter_reset_watermark(&memcg->tcp_mem.memory_allocated);
|
|
||||||
break;
|
|
||||||
case RES_FAILCNT:
|
|
||||||
memcg->tcp_mem.memory_allocated.failcnt = 0;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
return nbytes;
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct cftype tcp_files[] = {
|
|
||||||
{
|
|
||||||
.name = "kmem.tcp.limit_in_bytes",
|
|
||||||
.write = tcp_cgroup_write,
|
|
||||||
.read_u64 = tcp_cgroup_read,
|
|
||||||
.private = RES_LIMIT,
|
|
||||||
},
|
|
||||||
{
|
|
||||||
.name = "kmem.tcp.usage_in_bytes",
|
|
||||||
.read_u64 = tcp_cgroup_read,
|
|
||||||
.private = RES_USAGE,
|
|
||||||
},
|
|
||||||
{
|
|
||||||
.name = "kmem.tcp.failcnt",
|
|
||||||
.private = RES_FAILCNT,
|
|
||||||
.write = tcp_cgroup_reset,
|
|
||||||
.read_u64 = tcp_cgroup_read,
|
|
||||||
},
|
|
||||||
{
|
|
||||||
.name = "kmem.tcp.max_usage_in_bytes",
|
|
||||||
.private = RES_MAX_USAGE,
|
|
||||||
.write = tcp_cgroup_reset,
|
|
||||||
.read_u64 = tcp_cgroup_read,
|
|
||||||
},
|
|
||||||
{ } /* terminate */
|
|
||||||
};
|
|
||||||
|
|
||||||
static int __init tcp_memcontrol_init(void)
|
|
||||||
{
|
|
||||||
WARN_ON(cgroup_add_legacy_cftypes(&memory_cgrp_subsys, tcp_files));
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
__initcall(tcp_memcontrol_init);
|
|
|
@ -61,7 +61,6 @@
|
||||||
#include <net/timewait_sock.h>
|
#include <net/timewait_sock.h>
|
||||||
#include <net/inet_common.h>
|
#include <net/inet_common.h>
|
||||||
#include <net/secure_seq.h>
|
#include <net/secure_seq.h>
|
||||||
#include <net/tcp_memcontrol.h>
|
|
||||||
#include <net/busy_poll.h>
|
#include <net/busy_poll.h>
|
||||||
|
|
||||||
#include <linux/proc_fs.h>
|
#include <linux/proc_fs.h>
|
||||||
|
|
Loading…
Reference in New Issue