#ifndef _LTTNG_WRAPPER_VMALLOC_H
#define _LTTNG_WRAPPER_VMALLOC_H
-#include <linux/version.h>
+#include <lttng/kernel-version.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <wrapper/kallsyms.h>
#include <lttng/kernel-version.h>
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,8,0))
/*
* wrapper_vmalloc_sync_mappings was removed in v5.8, the vmalloc mappings
void wrapper_vmalloc_sync_mappings(void)
{}
-#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) \
|| LTTNG_KERNEL_RANGE(5,5,12, 5,6,0) \
|| LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
|| LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
|| LTTNG_KERNEL_RANGE(4,19,113, 4,20,0) \
|| LTTNG_KERNEL_RANGE(4,14,175, 4,15,0) \
|| LTTNG_KERNEL_RANGE(4,9,218, 4,10,0) \
- || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0)) \
+ || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0) \
|| LTTNG_UBUNTU_KERNEL_RANGE(4,15,18,97, 4,16,0,0) \
|| LTTNG_UBUNTU_KERNEL_RANGE(5,0,21,48, 5,1,0,0) \
- || LTTNG_UBUNTU_KERNEL_RANGE(5,3,18,52, 5,4,0,0)
+ || LTTNG_UBUNTU_KERNEL_RANGE(5,3,18,52, 5,4,0,0) \
+ || LTTNG_RHEL_KERNEL_RANGE(4,18,0,240,0,0, 4,19,0,0,0,0))
static inline
void wrapper_vmalloc_sync_mappings(void)
* trigger recursive page faults.
*/
printk_once(KERN_WARNING "LTTng: vmalloc_sync_mappings symbol lookup failed.\n");
- printk_once(KERN_WARNING "Page fault handler and NMI tracing might trigger faults.\n");
+ printk_once(KERN_WARNING "LTTng: Page fault handler and NMI tracing might trigger faults.\n");
#endif
}
}
vmalloc_sync_mappings();
}
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) */
/*
* Map vmalloc_sync_mappings to vmalloc_sync_all() on kernels before 5.6.
* trigger recursive page faults.
*/
printk_once(KERN_WARNING "LTTng: vmalloc_sync_all symbol lookup failed.\n");
- printk_once(KERN_WARNING "Page fault handler and NMI tracing might trigger faults.\n");
+ printk_once(KERN_WARNING "LTTng: Page fault handler and NMI tracing might trigger faults.\n");
#endif
}
}
vmalloc_sync_all();
}
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) */
-#else
+#else /* CONFIG_KALLSYMS */
+
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,8,0))
+
+/*
+ * wrapper_vmalloc_sync_mappings was removed in v5.8, the vmalloc mappings
+ * are now synchronized when they are created or torn down.
+ */
+static inline
+void wrapper_vmalloc_sync_mappings(void)
+{}
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) \
|| LTTNG_KERNEL_RANGE(5,5,12, 5,6,0) \
|| LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
|| LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
return vmalloc_sync_mappings();
}
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) */
static inline
void wrapper_vmalloc_sync_mappings(void)
return vmalloc_sync_all();
}
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) */
#endif
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,12,0))
static inline
void *lttng_kvmalloc_node(unsigned long size, gfp_t flags, int node)
{
void print_vmalloc_node_range_warning(void)
{
printk_once(KERN_WARNING "LTTng: __vmalloc_node_range symbol lookup failed.\n");
- printk_once(KERN_WARNING "Tracer performance will be degraded on NUMA systems.\n");
- printk_once(KERN_WARNING "Please rebuild your kernel with CONFIG_KALLSYMS enabled.\n");
+ printk_once(KERN_WARNING "LTTng: Tracer performance will be degraded on NUMA systems.\n");
+ printk_once(KERN_WARNING "LTTng: Please rebuild your kernel with CONFIG_KALLSYMS enabled.\n");
}
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0))
+
/*
* kallsyms wrapper of __vmalloc_node with a fallback to kmalloc_node.
*/
vm_flags, node, caller);
}
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,6,0))
+
+/*
+ * kallsyms wrapper of __vmalloc_node with a fallback to kmalloc_node.
+ */
+static inline
+void *__lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ const void *caller)
+{
+#ifdef CONFIG_KALLSYMS
+ /*
+ * If we have KALLSYMS, get * __vmalloc_node_range which is not exported.
+ */
+ void *(*lttng__vmalloc_node_range)(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, const void *caller);
+
+ lttng__vmalloc_node_range = (void *) kallsyms_lookup_funcptr("__vmalloc_node_range");
+ if (lttng__vmalloc_node_range)
+ return lttng__vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+#endif
+ if (node != NUMA_NO_NODE)
+ print_vmalloc_node_range_warning();
+ return __vmalloc(size, gfp_mask, prot);
+}
+
+/*
+ * Canary function to check for '__vmalloc_node_range()' at compile time.
+ *
+ * From 'include/linux/vmalloc.h':
+ *
+ * extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ * unsigned long start, unsigned long end, gfp_t gfp_mask,
+ * pgprot_t prot, unsigned long vm_flags, int node,
+ * const void *caller);
+ */
+static inline
+void *__canary____lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, const void *caller)
+{
+ return __vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+}
+
+#else /* (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,6,0)) */
+
+/*
+ * kallsyms wrapper of __vmalloc_node with a fallback to kmalloc_node.
+ */
+static inline
+void *__lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ void *caller)
+{
+#ifdef CONFIG_KALLSYMS
+ /*
+ * If we have KALLSYMS, get * __vmalloc_node_range which is not exported.
+ */
+ void *(*lttng__vmalloc_node_range)(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, void *caller);
+
+ lttng__vmalloc_node_range = (void *) kallsyms_lookup_funcptr("__vmalloc_node_range");
+ if (lttng__vmalloc_node_range)
+ return lttng__vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+#endif
+ if (node != NUMA_NO_NODE)
+ print_vmalloc_node_range_warning();
+ return __vmalloc(size, gfp_mask, prot);
+}
+
+/*
+ * Canary function to check for '__vmalloc_node_range()' at compile time.
+ *
+ * From 'include/linux/vmalloc.h':
+ *
+ * extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ * unsigned long start, unsigned long end, gfp_t gfp_mask,
+ * pgprot_t prot, unsigned long vm_flags, int node,
+ * void *caller);
+ */
+static inline
+void *__canary____lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, void *caller)
+{
+ return __vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+}
+
+#endif
+
/**
* lttng_kvmalloc_node - attempt to allocate physically contiguous memory, but upon
* failure, fall back to non-contiguous (vmalloc) allocation.
projects / lttng-modules.git / blobdiff