+/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM writeback
#ifndef _TRACE_WRITEBACK_DEF_
#define _TRACE_WRITEBACK_DEF_
+/*
+ * Vanilla kernels before 4.0 do not implement inode_to_bdi
+ * RHEL kernels before 3.10.0-327.10.1 do not implement inode_to_bdi
+ * RHEL kernel 3.10.0-327.10.1 has inode_to_bdi
+ * RHEL kernel 3.10.0-327.13.1 includes a partial merge of upstream
+ * commit a212b105b07d75b48b1a166378282e8a77fbf53d which inlines
+ * inode_to_bdi but not sb_is_blkdev_sb making it unusable by modules.
+ */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,0,0))
-static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
+static inline struct backing_dev_info *lttng_inode_to_bdi(struct inode *inode)
{
- struct super_block *sb = inode->i_sb;
+ struct super_block *sb;
+
+ if (!inode)
+ return &noop_backing_dev_info;
+
+ sb = inode->i_sb;
if (strcmp(sb->s_type->name, "bdev") == 0)
return inode->i_mapping->backing_dev_info;
return sb->s_bdi;
}
+#else
+static inline struct backing_dev_info *lttng_inode_to_bdi(struct inode *inode)
+{
+ return inode_to_bdi(inode);
+}
#endif /* #if (LINUX_VERSION_CODE < KERNEL_VERSION(4,0,0)) */
#endif
TP_ARGS(page, mapping),
TP_FIELDS(
ctf_array_text(char, name,
- mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32)
+ mapping ? dev_name(lttng_inode_to_bdi(mapping->host)->dev) : "(unknown)", 32)
ctf_integer(unsigned long, ino, mapping ? mapping->host->i_ino : 0)
ctf_integer(pgoff_t, index, page->index)
)
TP_FIELDS(
/* may be called for files on pseudo FSes w/ unregistered bdi */
ctf_array_text(char, name,
- inode_to_bdi(inode)->dev ?
- dev_name(inode_to_bdi(inode)->dev) : "(unknown)", 32)
+ lttng_inode_to_bdi(inode)->dev ?
+ dev_name(lttng_inode_to_bdi(inode)->dev) : "(unknown)", 32)
ctf_integer(unsigned long, ino, inode->i_ino)
ctf_integer(unsigned long, state, inode->i_state)
ctf_integer(unsigned long, flags, flags)
TP_ARGS(inode, wbc),
TP_FIELDS(
ctf_array_text(char, name,
- dev_name(inode_to_bdi(inode)->dev), 32)
+ dev_name(lttng_inode_to_bdi(inode)->dev), 32)
ctf_integer(unsigned long, ino, inode->i_ino)
ctf_integer(int, sync_mode, wbc->sync_mode)
)
#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)) */
DEFINE_WRITEBACK_EVENT(writeback_nowork)
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
DEFINE_WRITEBACK_EVENT(writeback_wake_background)
-#endif
DEFINE_WRITEBACK_EVENT(writeback_wake_thread)
DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread)
DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister)
)
)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0))
+LTTNG_TRACEPOINT_EVENT_MAP(global_dirty_state,
+
+ writeback_global_dirty_state,
+
+ TP_PROTO(unsigned long background_thresh,
+ unsigned long dirty_thresh
+ ),
+
+ TP_ARGS(background_thresh,
+ dirty_thresh
+ ),
+
+ TP_FIELDS(
+ ctf_integer(unsigned long, nr_dirty, global_node_page_state(NR_FILE_DIRTY))
+ ctf_integer(unsigned long, nr_writeback, global_node_page_state(NR_WRITEBACK))
+ ctf_integer(unsigned long, nr_unstable, global_node_page_state(NR_UNSTABLE_NFS))
+ ctf_integer(unsigned long, nr_dirtied, global_node_page_state(NR_DIRTIED))
+ ctf_integer(unsigned long, nr_written, global_node_page_state(NR_WRITTEN))
+ ctf_integer(unsigned long, background_thresh, background_thresh)
+ ctf_integer(unsigned long, dirty_thresh, dirty_thresh)
+ ctf_integer(unsigned long, dirty_limit, global_dirty_limit)
+ )
+)
+#else
LTTNG_TRACEPOINT_EVENT_MAP(global_dirty_state,
writeback_global_dirty_state,
)
)
#endif
+#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
TP_FIELDS(
ctf_array_text(char, name,
- dev_name(inode_to_bdi(inode)->dev), 32)
+ dev_name(lttng_inode_to_bdi(inode)->dev), 32)
ctf_integer(unsigned long, ino, inode->i_ino)
ctf_integer(unsigned long, state, inode->i_state)
ctf_integer(unsigned long, dirtied_when, inode->dirtied_when)
)
#endif
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
LTTNG_TRACEPOINT_EVENT_CLASS(writeback_congest_waited_template,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
TP_ARGS(usec_timeout, usec_delayed)
)
-#endif
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
LTTNG_TRACEPOINT_EVENT_CLASS(writeback_single_inode_template,
TP_FIELDS(
ctf_array_text(char, name,
- dev_name(inode_to_bdi(inode)->dev), 32)
+ dev_name(lttng_inode_to_bdi(inode)->dev), 32)
ctf_integer(unsigned long, ino, inode->i_ino)
ctf_integer(unsigned long, state, inode->i_state)
ctf_integer(unsigned long, dirtied_when, inode->dirtied_when)