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-rw-r--r--kernel/cgroup.c38
-rw-r--r--kernel/cgroup_freezer.c20
-rw-r--r--kernel/cpuset.c16
3 files changed, 37 insertions, 37 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a16f91d..2a88ce7 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1035,7 +1035,7 @@ static umode_t cgroup_file_mode(const struct cftype *cft)
mode |= S_IRUGO;
if (cft->write_u64 || cft->write_s64 || cft->write ||
- cft->write_string || cft->trigger)
+ cft->trigger)
mode |= S_IWUSR;
return mode;
@@ -2352,20 +2352,21 @@ static int cgroup_procs_write(struct cgroup_subsys_state *css,
return attach_task_by_pid(css->cgroup, tgid, true);
}
-static int cgroup_release_agent_write(struct cgroup_subsys_state *css,
- struct cftype *cft, char *buffer)
+static ssize_t cgroup_release_agent_write(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off)
{
- struct cgroup_root *root = css->cgroup->root;
+ struct cgroup *cgrp = of_css(of)->cgroup;
+ struct cgroup_root *root = cgrp->root;
BUILD_BUG_ON(sizeof(root->release_agent_path) < PATH_MAX);
- if (!cgroup_lock_live_group(css->cgroup))
+ if (!cgroup_lock_live_group(cgrp))
return -ENODEV;
spin_lock(&release_agent_path_lock);
- strlcpy(root->release_agent_path, buffer,
+ strlcpy(root->release_agent_path, strstrip(buf),
sizeof(root->release_agent_path));
spin_unlock(&release_agent_path_lock);
mutex_unlock(&cgroup_mutex);
- return 0;
+ return nbytes;
}
static int cgroup_release_agent_show(struct seq_file *seq, void *v)
@@ -2530,21 +2531,22 @@ out_finish:
}
/* change the enabled child controllers for a cgroup in the default hierarchy */
-static int cgroup_subtree_control_write(struct cgroup_subsys_state *dummy_css,
- struct cftype *cft, char *buffer)
+static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of,
+ char *buf, size_t nbytes,
+ loff_t off)
{
unsigned int enable = 0, disable = 0;
- struct cgroup *cgrp = dummy_css->cgroup, *child;
+ struct cgroup *cgrp = of_css(of)->cgroup, *child;
struct cgroup_subsys *ss;
- char *tok, *p;
+ char *tok;
int ssid, ret;
/*
* Parse input - space separated list of subsystem names prefixed
* with either + or -.
*/
- p = buffer;
- while ((tok = strsep(&p, " "))) {
+ buf = strstrip(buf);
+ while ((tok = strsep(&buf, " "))) {
if (tok[0] == '\0')
continue;
for_each_subsys(ss, ssid) {
@@ -2692,7 +2694,7 @@ out_unlock_tree:
out_unbreak:
kernfs_unbreak_active_protection(cgrp->control_kn);
cgroup_put(cgrp);
- return ret;
+ return ret ?: nbytes;
err_undo_css:
cgrp->child_subsys_mask &= ~enable;
@@ -2738,9 +2740,7 @@ static ssize_t cgroup_file_write(struct kernfs_open_file *of, char *buf,
css = cgroup_css(cgrp, cft->ss);
rcu_read_unlock();
- if (cft->write_string) {
- ret = cft->write_string(css, cft, strstrip(buf));
- } else if (cft->write_u64) {
+ if (cft->write_u64) {
unsigned long long v;
ret = kstrtoull(buf, 0, &v);
if (!ret)
@@ -3984,7 +3984,7 @@ static struct cftype cgroup_base_files[] = {
.name = "cgroup.subtree_control",
.flags = CFTYPE_ONLY_ON_DFL,
.seq_show = cgroup_subtree_control_show,
- .write_string = cgroup_subtree_control_write,
+ .write = cgroup_subtree_control_write,
},
{
.name = "cgroup.populated",
@@ -4018,7 +4018,7 @@ static struct cftype cgroup_base_files[] = {
.name = "release_agent",
.flags = CFTYPE_INSANE | CFTYPE_ONLY_ON_ROOT,
.seq_show = cgroup_release_agent_show,
- .write_string = cgroup_release_agent_write,
+ .write = cgroup_release_agent_write,
.max_write_len = PATH_MAX - 1,
},
{ } /* terminate */
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c
index 0398f7e..6b4e60e 100644
--- a/kernel/cgroup_freezer.c
+++ b/kernel/cgroup_freezer.c
@@ -73,10 +73,6 @@ bool cgroup_freezing(struct task_struct *task)
return ret;
}
-/*
- * cgroups_write_string() limits the size of freezer state strings to
- * CGROUP_LOCAL_BUFFER_SIZE
- */
static const char *freezer_state_strs(unsigned int state)
{
if (state & CGROUP_FROZEN)
@@ -423,20 +419,22 @@ static void freezer_change_state(struct freezer *freezer, bool freeze)
mutex_unlock(&freezer_mutex);
}
-static int freezer_write(struct cgroup_subsys_state *css, struct cftype *cft,
- char *buffer)
+static ssize_t freezer_write(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off)
{
bool freeze;
- if (strcmp(buffer, freezer_state_strs(0)) == 0)
+ buf = strstrip(buf);
+
+ if (strcmp(buf, freezer_state_strs(0)) == 0)
freeze = false;
- else if (strcmp(buffer, freezer_state_strs(CGROUP_FROZEN)) == 0)
+ else if (strcmp(buf, freezer_state_strs(CGROUP_FROZEN)) == 0)
freeze = true;
else
return -EINVAL;
- freezer_change_state(css_freezer(css), freeze);
- return 0;
+ freezer_change_state(css_freezer(of_css(of)), freeze);
+ return nbytes;
}
static u64 freezer_self_freezing_read(struct cgroup_subsys_state *css,
@@ -460,7 +458,7 @@ static struct cftype files[] = {
.name = "state",
.flags = CFTYPE_NOT_ON_ROOT,
.seq_show = freezer_read,
- .write_string = freezer_write,
+ .write = freezer_write,
},
{
.name = "self_freezing",
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 37ca0a5..2f4b08b 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1603,13 +1603,15 @@ out_unlock:
/*
* Common handling for a write to a "cpus" or "mems" file.
*/
-static int cpuset_write_resmask(struct cgroup_subsys_state *css,
- struct cftype *cft, char *buf)
+static ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off)
{
- struct cpuset *cs = css_cs(css);
+ struct cpuset *cs = css_cs(of_css(of));
struct cpuset *trialcs;
int retval = -ENODEV;
+ buf = strstrip(buf);
+
/*
* CPU or memory hotunplug may leave @cs w/o any execution
* resources, in which case the hotplug code asynchronously updates
@@ -1633,7 +1635,7 @@ static int cpuset_write_resmask(struct cgroup_subsys_state *css,
goto out_unlock;
}
- switch (cft->private) {
+ switch (of_cft(of)->private) {
case FILE_CPULIST:
retval = update_cpumask(cs, trialcs, buf);
break;
@@ -1648,7 +1650,7 @@ static int cpuset_write_resmask(struct cgroup_subsys_state *css,
free_trial_cpuset(trialcs);
out_unlock:
mutex_unlock(&cpuset_mutex);
- return retval;
+ return retval ?: nbytes;
}
/*
@@ -1750,7 +1752,7 @@ static struct cftype files[] = {
{
.name = "cpus",
.seq_show = cpuset_common_seq_show,
- .write_string = cpuset_write_resmask,
+ .write = cpuset_write_resmask,
.max_write_len = (100U + 6 * NR_CPUS),
.private = FILE_CPULIST,
},
@@ -1758,7 +1760,7 @@ static struct cftype files[] = {
{
.name = "mems",
.seq_show = cpuset_common_seq_show,
- .write_string = cpuset_write_resmask,
+ .write = cpuset_write_resmask,
.max_write_len = (100U + 6 * MAX_NUMNODES),
.private = FILE_MEMLIST,
},
generated by cgit v0.10.2 at 2024-11-07 15:03:11 (GMT)