From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
ftrace's __print_symbolic() has a (very poorly documented) requirement
that any enum values used in the symbol to string translation table be
wrapped in a TRACE_DEFINE_ENUM so that the enum value can be encoded in
the ftrace ring buffer. Fix this unsatisfied requirement.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_types.h | 4 ++++
fs/xfs/xfs_aops.h | 3 +++
fs/xfs/xfs_trace.h | 19 +++++++++++++++++++
3 files changed, 26 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h
index 05e8fa558f3e..e03508a650c4 100644
--- a/fs/xfs/libxfs/xfs_types.h
+++ b/fs/xfs/libxfs/xfs_types.h
@@ -100,6 +100,10 @@ typedef void * xfs_failaddr_t;
*/
#define MAXNAMELEN 256
+/*
+ * This enum is used in string mapping in xfs_trace.h; please keep the
+ * TRACE_DEFINE_ENUMs for it up to date.
+ */
typedef enum {
XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
} xfs_lookup_t;
diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h
index 494b4338446e..e5c23948a8ab 100644
--- a/fs/xfs/xfs_aops.h
+++ b/fs/xfs/xfs_aops.h
@@ -10,6 +10,9 @@ extern struct bio_set xfs_ioend_bioset;
/*
* Types of I/O for bmap clustering and I/O completion tracking.
+ *
+ * This enum is used in string mapping in xfs_trace.h; please keep the
+ * TRACE_DEFINE_ENUMs for it up to date.
*/
enum {
XFS_IO_HOLE, /* covers region without any block allocation */
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index cabe5c8010b0..deac0b3e64c2 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -640,6 +640,16 @@ DEFINE_INODE_EVENT(xfs_inode_set_cowblocks_tag);
DEFINE_INODE_EVENT(xfs_inode_clear_cowblocks_tag);
DEFINE_INODE_EVENT(xfs_inode_free_cowblocks_invalid);
+/*
+ * ftrace's __print_symbolic requires that all enum values be wrapped in the
+ * TRACE_DEFINE_ENUM macro so that the enum value can be encoded in the ftrace
+ * ring buffer. Somehow this was only worth mentioning in the ftrace sample
+ * code.
+ */
+TRACE_DEFINE_ENUM(PE_SIZE_PTE);
+TRACE_DEFINE_ENUM(PE_SIZE_PMD);
+TRACE_DEFINE_ENUM(PE_SIZE_PUD);
+
TRACE_EVENT(xfs_filemap_fault,
TP_PROTO(struct xfs_inode *ip, enum page_entry_size pe_size,
bool write_fault),
@@ -1208,6 +1218,12 @@ DEFINE_EVENT(xfs_readpage_class, name, \
DEFINE_READPAGE_EVENT(xfs_vm_readpage);
DEFINE_READPAGE_EVENT(xfs_vm_readpages);
+TRACE_DEFINE_ENUM(XFS_IO_HOLE);
+TRACE_DEFINE_ENUM(XFS_IO_DELALLOC);
+TRACE_DEFINE_ENUM(XFS_IO_UNWRITTEN);
+TRACE_DEFINE_ENUM(XFS_IO_OVERWRITE);
+TRACE_DEFINE_ENUM(XFS_IO_COW);
+
DECLARE_EVENT_CLASS(xfs_imap_class,
TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count,
int type, struct xfs_bmbt_irec *irec),
@@ -2610,6 +2626,9 @@ DEFINE_AG_ERROR_EVENT(xfs_ag_resv_init_error);
#define DEFINE_AG_EXTENT_EVENT(name) DEFINE_DISCARD_EVENT(name)
/* ag btree lookup tracepoint class */
+TRACE_DEFINE_ENUM(XFS_LOOKUP_EQi);
+TRACE_DEFINE_ENUM(XFS_LOOKUP_LEi);
+TRACE_DEFINE_ENUM(XFS_LOOKUP_GEi);
#define XFS_AG_BTREE_CMP_FORMAT_STR \
{ XFS_LOOKUP_EQ, "eq" }, \
{ XFS_LOOKUP_LE, "le" }, \
