From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sun, 28 Dec 2014 13:49:25 +0000 (-0500)
Subject: Fix: Add f_dentry wrapper for 3.19+ kernels
X-Git-Tag: v2.7.0-rc1~92
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=b06ed645c23ac947e0f5ac01b6eba6947c53d77c;p=lttng-modules.git

Fix: Add f_dentry wrapper for 3.19+ kernels

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lib/ringbuffer/ring_buffer_iterator.c b/lib/ringbuffer/ring_buffer_iterator.c
index 290466f8..24e3dbb3 100644
--- a/lib/ringbuffer/ring_buffer_iterator.c
+++ b/lib/ringbuffer/ring_buffer_iterator.c
@@ -26,6 +26,7 @@
  */
 
 #include "../../wrapper/ringbuffer/iterator.h"
+#include "../../wrapper/file.h"
 #include <linux/jiffies.h>
 #include <linux/delay.h>
 #include <linux/module.h>
@@ -691,7 +692,7 @@ ssize_t lib_ring_buffer_file_read(struct file *filp,
 			          size_t count,
 			          loff_t *ppos)
 {
-	struct inode *inode = filp->f_dentry->d_inode;
+	struct inode *inode = filp->lttng_f_dentry->d_inode;
 	struct lib_ring_buffer *buf = inode->i_private;
 	struct channel *chan = buf->backend.chan;
 
@@ -716,7 +717,7 @@ ssize_t channel_file_read(struct file *filp,
 			  size_t count,
 			  loff_t *ppos)
 {
-	struct inode *inode = filp->f_dentry->d_inode;
+	struct inode *inode = filp->lttng_f_dentry->d_inode;
 	struct channel *chan = inode->i_private;
 	const struct lib_ring_buffer_config *config = &chan->backend.config;
 
diff --git a/lttng-statedump-impl.c b/lttng-statedump-impl.c
index e0d74f6f..2c7fc178 100644
--- a/lttng-statedump-impl.c
+++ b/lttng-statedump-impl.c
@@ -56,6 +56,7 @@
 #include "wrapper/irq.h"
 #include "wrapper/tracepoint.h"
 #include "wrapper/genhd.h"
+#include "wrapper/file.h"
 
 #ifdef CONFIG_LTTNG_HAS_LIST_IRQ
 #include <linux/irq.h>
@@ -327,7 +328,7 @@ void lttng_enumerate_task_vm_maps(struct lttng_session *session,
 		down_read(&mm->mmap_sem);
 		while (map) {
 			if (map->vm_file)
-				ino = map->vm_file->f_dentry->d_inode->i_ino;
+				ino = map->vm_file->lttng_f_dentry->d_inode->i_ino;
 			else
 				ino = 0;
 			trace_lttng_statedump_vm_map(session, p, map, ino);
diff --git a/wrapper/file.h b/wrapper/file.h
index 2440745c..37c8c9ba 100644
--- a/wrapper/file.h
+++ b/wrapper/file.h
@@ -34,6 +34,8 @@ inline int lttng_get_unused_fd(void)
 	return get_unused_fd_flags(0);
 }
 
+#define lttng_f_dentry	f_path.dentry
+
 #else /* #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) */
 
 static
@@ -42,6 +44,8 @@ inline int lttng_get_unused_fd(void)
 	return get_unused_fd();
 }
 
+#define lttng_f_dentry	f_dentry
+
 #endif /* #else #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) */
 
 #endif /* _LTTNG_WRAPPER_FILE_H */