Bug #1149 » WIP-linux-cgroup-tracepoints.patch
| include/trace/events/cgroup.h | ||
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TP_ARGS(dst_cgrp, task, threadgroup)
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);
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TRACE_EVENT(cgroup_file_write_fail,
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TP_PROTO(struct cgroup *cgrp, struct cftype *cft, int ret),
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TP_ARGS(cgrp, cft, ret),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, id )
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__string( ss_name, cft->ss->name )
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__string( name, cft->name )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgrp->id;
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__assign_str(ss_name, cft->ss->name);
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__assign_str(name, cft->name);
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__entry->ret = ret;
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),
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TP_printk("root=%d id=%d ss_name=%s name=%s ret=%d",
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__entry->root, __entry->id, __get_str(ss_name),
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__get_str(name), __entry->ret)
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);
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TRACE_EVENT(cgroup_file_write_u64,
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TP_PROTO(struct cgroup *cgrp, struct cftype *cft,
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u64 val, int ret),
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TP_ARGS(cgrp, cft, val, ret),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, id )
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__string( ss_name, cft->ss->name )
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__string( name, cft->name )
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__field( u64, val )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgrp->id;
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__assign_str(ss_name, cft->ss->name);
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__assign_str(name, cft->name);
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__entry->val = val;
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__entry->ret = ret;
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),
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TP_printk("root=%d id=%d ss_name=%s name=%s val=%lld ret=%d",
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__entry->root, __entry->id, __get_str(ss_name),
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__get_str(name), __entry->val, __entry->ret)
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);
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TRACE_EVENT(cgroup_file_write_s64,
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TP_PROTO(struct cgroup *cgrp, struct cftype *cft,
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s64 val, int ret),
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TP_ARGS(cgrp, cft, val, ret),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, id )
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__string( ss_name, cft->ss->name )
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__string( name, cft->name )
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__field( s64, val )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgrp->id;
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__assign_str(ss_name, cft->ss->name);
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__assign_str(name, cft->name);
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__entry->val = val;
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__entry->ret = ret;
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),
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TP_printk("root=%d id=%d ss_name=%s name=%s val=%lld ret=%d",
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__entry->root, __entry->id, __get_str(ss_name),
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__get_str(name), __entry->val, __entry->ret)
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);
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TRACE_EVENT(cgroup_file_write_str,
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TP_PROTO(struct cgroup *cgrp, struct cftype *cft,
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char *buf, int ret),
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TP_ARGS(cgrp, cft, buf, ret),
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TP_STRUCT__entry(
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__field( int, root )
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__field( int, id )
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__string( ss_name, cft->ss->name )
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__string( name, cft->name )
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__string( str, buf )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->root = cgrp->root->hierarchy_id;
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__entry->id = cgrp->id;
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__assign_str(ss_name, cft->ss->name);
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__assign_str(name, cft->name);
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__assign_str(str, buf);
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__entry->ret = ret;
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),
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TP_printk("root=%d id=%d ss_name=%s name=%s str=%s ret=%d",
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__entry->root, __entry->id, __get_str(ss_name),
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__get_str(name), __get_str(str), __entry->ret)
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);
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#endif /* _TRACE_CGROUP_H */
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/* This part must be outside protection */
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| kernel/cgroup/cgroup.c | ||
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*/
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if ((cgrp->root->flags & CGRP_ROOT_NS_DELEGATE) &&
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!(cft->flags & CFTYPE_NS_DELEGATABLE) &&
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ns != &init_cgroup_ns && ns->root_cset->dfl_cgrp == cgrp)
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return -EPERM;
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ns != &init_cgroup_ns && ns->root_cset->dfl_cgrp == cgrp) {
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ret = -EPERM;
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trace_cgroup_file_write_fail(cgrp, cft, ret);
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return ret;
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}
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if (cft->write)
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return cft->write(of, buf, nbytes, off);
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if (cft->write) {
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ret = cft->write(of, buf, nbytes, off);
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if (ret)
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trace_cgroup_file_write_fail(cgrp, cft, ret);
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else
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trace_cgroup_file_write_str(cgrp, cft, buf, ret);
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return ret;
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}
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/*
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* kernfs guarantees that a file isn't deleted with operations in
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| ... | ... | |
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if (cft->write_u64) {
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unsigned long long v;
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ret = kstrtoull(buf, 0, &v);
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if (!ret)
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if (!ret) {
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ret = cft->write_u64(css, cft, v);
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trace_cgroup_file_write_u64(cgrp, cft, v, ret);
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}
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else
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trace_cgroup_file_write_fail(cgrp, cft, ret);
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} else if (cft->write_s64) {
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long long v;
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ret = kstrtoll(buf, 0, &v);
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if (!ret)
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if (!ret) {
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ret = cft->write_s64(css, cft, v);
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trace_cgroup_file_write_s64(cgrp, cft, v, ret);
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}
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else
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trace_cgroup_file_write_fail(cgrp, cft, ret);
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} else {
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ret = -EINVAL;
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trace_cgroup_file_write_fail(cgrp, cft, ret);
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}
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return ret ?: nbytes;
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