From 676f7c8f84d15e94065841529016da5ab92e901b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 1 Apr 2012 12:09:55 -0700 Subject: cgroup: relocate cftype and cgroup_subsys definitions in controllers blk-cgroup, netprio_cgroup, cls_cgroup and tcp_memcontrol unnecessarily define cftype array and cgroup_subsys structures at the top of the file, which is unconventional and necessiates forward declaration of methods. This patch relocates those below the definitions of the methods and removes the forward declarations. Note that forward declaration of tcp_files[] is added in tcp_memcontrol.c for tcp_init_cgroup(). This will be removed soon by another patch. This patch doesn't introduce any functional change. Signed-off-by: Tejun Heo Acked-by: Li Zefan --- block/blk-cgroup.c | 38 ++++++++++++++++---------------------- 1 file changed, 16 insertions(+), 22 deletions(-) (limited to 'block') diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index ea84a23d5e68..60ef16d6d155 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -28,34 +28,12 @@ static LIST_HEAD(blkio_list); struct blkio_cgroup blkio_root_cgroup = { .weight = 2*BLKIO_WEIGHT_DEFAULT }; EXPORT_SYMBOL_GPL(blkio_root_cgroup); -static struct cgroup_subsys_state *blkiocg_create(struct cgroup *); -static int blkiocg_can_attach(struct cgroup *, struct cgroup_taskset *); -static void blkiocg_attach(struct cgroup *, struct cgroup_taskset *); -static void blkiocg_destroy(struct cgroup *); -static int blkiocg_populate(struct cgroup_subsys *, struct cgroup *); - /* for encoding cft->private value on file */ #define BLKIOFILE_PRIVATE(x, val) (((x) << 16) | (val)) /* What policy owns the file, proportional or throttle */ #define BLKIOFILE_POLICY(val) (((val) >> 16) & 0xffff) #define BLKIOFILE_ATTR(val) ((val) & 0xffff) -struct cgroup_subsys blkio_subsys = { - .name = "blkio", - .create = blkiocg_create, - .can_attach = blkiocg_can_attach, - .attach = blkiocg_attach, - .destroy = blkiocg_destroy, - .populate = blkiocg_populate, -#ifdef CONFIG_BLK_CGROUP - /* note: blkio_subsys_id is otherwise defined in blk-cgroup.h */ - .subsys_id = blkio_subsys_id, -#endif - .use_id = 1, - .module = THIS_MODULE, -}; -EXPORT_SYMBOL_GPL(blkio_subsys); - static inline void blkio_policy_insert_node(struct blkio_cgroup *blkcg, struct blkio_policy_node *pn) { @@ -1658,6 +1636,22 @@ static void blkiocg_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) } } +struct cgroup_subsys blkio_subsys = { + .name = "blkio", + .create = blkiocg_create, + .can_attach = blkiocg_can_attach, + .attach = blkiocg_attach, + .destroy = blkiocg_destroy, + .populate = blkiocg_populate, +#ifdef CONFIG_BLK_CGROUP + /* note: blkio_subsys_id is otherwise defined in blk-cgroup.h */ + .subsys_id = blkio_subsys_id, +#endif + .use_id = 1, + .module = THIS_MODULE, +}; +EXPORT_SYMBOL_GPL(blkio_subsys); + void blkio_policy_register(struct blkio_policy_type *blkiop) { spin_lock(&blkio_list_lock); -- cgit v1.2.3-59-g8ed1b From 4baf6e33251b37f111e21289f8ee71fe4cce236e Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 1 Apr 2012 12:09:55 -0700 Subject: cgroup: convert all non-memcg controllers to the new cftype interface Convert debug, freezer, cpuset, cpu_cgroup, cpuacct, net_prio, blkio, net_cls and device controllers to use the new cftype based interface. Termination entry is added to cftype arrays and populate callbacks are replaced with cgroup_subsys->base_cftypes initializations. This is functionally identical transformation. There shouldn't be any visible behavior change. memcg is rather special and will be converted separately. Signed-off-by: Tejun Heo Acked-by: Li Zefan Cc: Paul Menage Cc: Ingo Molnar Cc: Peter Zijlstra Cc: "David S. Miller" Cc: Vivek Goyal --- block/blk-cgroup.c | 9 ++------- kernel/cgroup.c | 10 +++------- kernel/cgroup_freezer.c | 11 +++-------- kernel/cpuset.c | 31 ++++++++++--------------------- kernel/sched/core.c | 16 ++++------------ net/core/netprio_cgroup.c | 8 ++------ net/sched/cls_cgroup.c | 8 ++------ security/device_cgroup.c | 10 ++-------- 8 files changed, 28 insertions(+), 75 deletions(-) (limited to 'block') diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 60ef16d6d155..126c341955de 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1515,14 +1515,9 @@ struct cftype blkio_files[] = { .read_map = blkiocg_file_read_map, }, #endif + { } /* terminate */ }; -static int blkiocg_populate(struct cgroup_subsys *subsys, struct cgroup *cgroup) -{ - return cgroup_add_files(cgroup, subsys, blkio_files, - ARRAY_SIZE(blkio_files)); -} - static void blkiocg_destroy(struct cgroup *cgroup) { struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgroup); @@ -1642,11 +1637,11 @@ struct cgroup_subsys blkio_subsys = { .can_attach = blkiocg_can_attach, .attach = blkiocg_attach, .destroy = blkiocg_destroy, - .populate = blkiocg_populate, #ifdef CONFIG_BLK_CGROUP /* note: blkio_subsys_id is otherwise defined in blk-cgroup.h */ .subsys_id = blkio_subsys_id, #endif + .base_cftypes = blkio_files, .use_id = 1, .module = THIS_MODULE, }; diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 66c1e3b5c0f2..835ae29e4ea2 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -5349,19 +5349,15 @@ static struct cftype debug_files[] = { .name = "releasable", .read_u64 = releasable_read, }, -}; -static int debug_populate(struct cgroup_subsys *ss, struct cgroup *cont) -{ - return cgroup_add_files(cont, ss, debug_files, - ARRAY_SIZE(debug_files)); -} + { } /* terminate */ +}; struct cgroup_subsys debug_subsys = { .name = "debug", .create = debug_create, .destroy = debug_destroy, - .populate = debug_populate, .subsys_id = debug_subsys_id, + .base_cftypes = debug_files, }; #endif /* CONFIG_CGROUP_DEBUG */ diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index f86e93920b62..3649fc6b3eaa 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -358,24 +358,19 @@ static int freezer_write(struct cgroup *cgroup, static struct cftype files[] = { { .name = "state", + .flags = CFTYPE_NOT_ON_ROOT, .read_seq_string = freezer_read, .write_string = freezer_write, }, + { } /* terminate */ }; -static int freezer_populate(struct cgroup_subsys *ss, struct cgroup *cgroup) -{ - if (!cgroup->parent) - return 0; - return cgroup_add_files(cgroup, ss, files, ARRAY_SIZE(files)); -} - struct cgroup_subsys freezer_subsys = { .name = "freezer", .create = freezer_create, .destroy = freezer_destroy, - .populate = freezer_populate, .subsys_id = freezer_subsys_id, .can_attach = freezer_can_attach, .fork = freezer_fork, + .base_cftypes = files, }; diff --git a/kernel/cpuset.c b/kernel/cpuset.c index b96ad75b7e64..2382683617a3 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1765,28 +1765,17 @@ static struct cftype files[] = { .write_u64 = cpuset_write_u64, .private = FILE_SPREAD_SLAB, }, -}; - -static struct cftype cft_memory_pressure_enabled = { - .name = "memory_pressure_enabled", - .read_u64 = cpuset_read_u64, - .write_u64 = cpuset_write_u64, - .private = FILE_MEMORY_PRESSURE_ENABLED, -}; -static int cpuset_populate(struct cgroup_subsys *ss, struct cgroup *cont) -{ - int err; + { + .name = "memory_pressure_enabled", + .flags = CFTYPE_ONLY_ON_ROOT, + .read_u64 = cpuset_read_u64, + .write_u64 = cpuset_write_u64, + .private = FILE_MEMORY_PRESSURE_ENABLED, + }, - err = cgroup_add_files(cont, ss, files, ARRAY_SIZE(files)); - if (err) - return err; - /* memory_pressure_enabled is in root cpuset only */ - if (!cont->parent) - err = cgroup_add_file(cont, ss, - &cft_memory_pressure_enabled); - return err; -} + { } /* terminate */ +}; /* * post_clone() is called during cgroup_create() when the @@ -1887,9 +1876,9 @@ struct cgroup_subsys cpuset_subsys = { .destroy = cpuset_destroy, .can_attach = cpuset_can_attach, .attach = cpuset_attach, - .populate = cpuset_populate, .post_clone = cpuset_post_clone, .subsys_id = cpuset_subsys_id, + .base_cftypes = files, .early_init = 1, }; diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4603b9d8f30a..afc6d7e71557 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7970,13 +7970,9 @@ static struct cftype cpu_files[] = { .write_u64 = cpu_rt_period_write_uint, }, #endif + { } /* terminate */ }; -static int cpu_cgroup_populate(struct cgroup_subsys *ss, struct cgroup *cont) -{ - return cgroup_add_files(cont, ss, cpu_files, ARRAY_SIZE(cpu_files)); -} - struct cgroup_subsys cpu_cgroup_subsys = { .name = "cpu", .create = cpu_cgroup_create, @@ -7984,8 +7980,8 @@ struct cgroup_subsys cpu_cgroup_subsys = { .can_attach = cpu_cgroup_can_attach, .attach = cpu_cgroup_attach, .exit = cpu_cgroup_exit, - .populate = cpu_cgroup_populate, .subsys_id = cpu_cgroup_subsys_id, + .base_cftypes = cpu_files, .early_init = 1, }; @@ -8170,13 +8166,9 @@ static struct cftype files[] = { .name = "stat", .read_map = cpuacct_stats_show, }, + { } /* terminate */ }; -static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp) -{ - return cgroup_add_files(cgrp, ss, files, ARRAY_SIZE(files)); -} - /* * charge this task's execution time to its accounting group. * @@ -8208,7 +8200,7 @@ struct cgroup_subsys cpuacct_subsys = { .name = "cpuacct", .create = cpuacct_create, .destroy = cpuacct_destroy, - .populate = cpuacct_populate, .subsys_id = cpuacct_subsys_id, + .base_cftypes = files, }; #endif /* CONFIG_CGROUP_CPUACCT */ diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c index dbfd4e7f8dc4..b2a59866699f 100644 --- a/net/core/netprio_cgroup.c +++ b/net/core/netprio_cgroup.c @@ -242,21 +242,17 @@ static struct cftype ss_files[] = { .read_map = read_priomap, .write_string = write_priomap, }, + { } /* terminate */ }; -static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp) -{ - return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files)); -} - struct cgroup_subsys net_prio_subsys = { .name = "net_prio", .create = cgrp_create, .destroy = cgrp_destroy, - .populate = cgrp_populate, #ifdef CONFIG_NETPRIO_CGROUP .subsys_id = net_prio_subsys_id, #endif + .base_cftypes = ss_files, .module = THIS_MODULE }; diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c index 024df8a32275..7743ea8d1d38 100644 --- a/net/sched/cls_cgroup.c +++ b/net/sched/cls_cgroup.c @@ -70,21 +70,17 @@ static struct cftype ss_files[] = { .read_u64 = read_classid, .write_u64 = write_classid, }, + { } /* terminate */ }; -static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp) -{ - return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files)); -} - struct cgroup_subsys net_cls_subsys = { .name = "net_cls", .create = cgrp_create, .destroy = cgrp_destroy, - .populate = cgrp_populate, #ifdef CONFIG_NET_CLS_CGROUP .subsys_id = net_cls_subsys_id, #endif + .base_cftypes = ss_files, .module = THIS_MODULE, }; diff --git a/security/device_cgroup.c b/security/device_cgroup.c index c43a3323feea..442204cc22d9 100644 --- a/security/device_cgroup.c +++ b/security/device_cgroup.c @@ -447,22 +447,16 @@ static struct cftype dev_cgroup_files[] = { .read_seq_string = devcgroup_seq_read, .private = DEVCG_LIST, }, + { } /* terminate */ }; -static int devcgroup_populate(struct cgroup_subsys *ss, - struct cgroup *cgroup) -{ - return cgroup_add_files(cgroup, ss, dev_cgroup_files, - ARRAY_SIZE(dev_cgroup_files)); -} - struct cgroup_subsys devices_subsys = { .name = "devices", .can_attach = devcgroup_can_attach, .create = devcgroup_create, .destroy = devcgroup_destroy, - .populate = devcgroup_populate, .subsys_id = devices_subsys_id, + .base_cftypes = dev_cgroup_files, }; int __devcgroup_inode_permission(struct inode *inode, int mask) -- cgit v1.2.3-59-g8ed1b