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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-12-19 01:32:29 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-12-20 01:02:01 +0300 |
| commit | 85f8dff00a3193fe5659aa4c91adde31723c0d3d (patch) | |
| tree | 30a2b71b5904cacbd4554951a38843b8074f9ff7 /fs/xfs | |
| parent | 7af8150f9935634e3e0f47c14e049ff401c82fb4 (diff) | |
| download | linux-85f8dff00a3193fe5659aa4c91adde31723c0d3d.tar.xz | |
xfs: fix symbolic enum printing in ftrace output
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@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_types.h | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_aops.h | 3 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 19 |
3 files changed, 26 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index b9e6c89284c3..9a6541872ec1 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" }, \ |