fio: ioengine flag cleanup

Convert how we define ioengine flags to use the same construction used
for thread flags. This allows us to count the number of ioengine flags
and write an assertion to ensure that thread flags and ioengine flags
fit inside td->flags.

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>

ioengines.h

@@ -72,33 +72,54 @@ struct ioengine_ops {
 	struct fio_option *options;
 };
 
-enum fio_ioengine_flags {
-	FIO_SYNCIO	= 1 << 0,	/* io engine has synchronous ->queue */
-	FIO_RAWIO	= 1 << 1,	/* some sort of direct/raw io */
-	FIO_DISKLESSIO	= 1 << 2,	/* no disk involved */
-	FIO_NOEXTEND	= 1 << 3,	/* engine can't extend file */
-	FIO_NODISKUTIL  = 1 << 4,	/* diskutil can't handle filename */
-	FIO_UNIDIR	= 1 << 5,	/* engine is uni-directional */
-	FIO_NOIO	= 1 << 6,	/* thread does only pseudo IO */
-	FIO_PIPEIO	= 1 << 7,	/* input/output no seekable */
-	FIO_BARRIER	= 1 << 8,	/* engine supports barriers */
-	FIO_MEMALIGN	= 1 << 9,	/* engine wants aligned memory */
-	FIO_BIT_BASED	= 1 << 10,	/* engine uses a bit base (e.g. uses Kbit as opposed to KB) */
-	FIO_FAKEIO	= 1 << 11,	/* engine pretends to do IO */
-	FIO_NOSTATS	= 1 << 12,	/* don't do IO stats */
-	FIO_NOFILEHASH	= 1 << 13,	/* doesn't hash the files for lookup later. */
-	FIO_ASYNCIO_SYNC_TRIM
-			= 1 << 14,	/* io engine has async ->queue except for trim */
-	FIO_NO_OFFLOAD	= 1 << 15,	/* no async offload */
-	FIO_ASYNCIO_SETS_ISSUE_TIME
-			= 1 << 16,	/* async ioengine with commit function that sets issue_time */
-	FIO_SKIPPABLE_IOMEM_ALLOC
-			= 1 << 17,	/* skip iomem_alloc & iomem_free if job sets mem/iomem */
-	FIO_RO_NEEDS_RW_OPEN
-			= 1 << 18,	/* open files in rw mode even if we have a read job; only
+enum {
+	__FIO_SYNCIO = 0,		/* io engine has synchronous ->queue */
+	__FIO_RAWIO,			/* some sort of direct/raw io */
+	__FIO_DISKLESSIO,		/* no disk involved */
+	__FIO_NOEXTEND,			/* engine can't extend file */
+	__FIO_NODISKUTIL,		/* diskutil can't handle filename */
+	__FIO_UNIDIR,			/* engine is uni-directional */
+	__FIO_NOIO,			/* thread does only pseudo IO */
+	__FIO_PIPEIO,			/* input/output no seekable */
+	__FIO_BARRIER,			/* engine supports barriers */
+	__FIO_MEMALIGN,			/* engine wants aligned memory */
+	__FIO_BIT_BASED,		/* engine uses a bit base (e.g. uses Kbit as opposed to
+					   KB) */
+	__FIO_FAKEIO,			/* engine pretends to do IO */
+	__FIO_NOSTATS,			/* don't do IO stats */
+	__FIO_NOFILEHASH,		/* doesn't hash the files for lookup later. */
+	__FIO_ASYNCIO_SYNC_TRIM,	/* io engine has async ->queue except for trim */
+	__FIO_NO_OFFLOAD,		/* no async offload */
+	__FIO_ASYNCIO_SETS_ISSUE_TIME,	/* async ioengine with commit function that sets
+					   issue_time */
+	__FIO_SKIPPABLE_IOMEM_ALLOC,	/* skip iomem_alloc & iomem_free if job sets mem/iomem */
+	__FIO_RO_NEEDS_RW_OPEN,		/* open files in rw mode even if we have a read job; only
 					   affects ioengines using generic_open_file */
-	FIO_MULTI_RANGE_TRIM
-			= 1 << 19,	/* ioengine supports trim with more than one range */
+	__FIO_MULTI_RANGE_TRIM,		/* ioengine supports trim with more than one range */
+	__FIO_IOENGINE_F_LAST,		/* not a real bit; used to count number of bits */
+};
+
+enum fio_ioengine_flags {
+	FIO_SYNCIO			= 1 << __FIO_SYNCIO,
+	FIO_RAWIO			= 1 << __FIO_RAWIO,
+	FIO_DISKLESSIO			= 1 << __FIO_DISKLESSIO,
+	FIO_NOEXTEND			= 1 << __FIO_NOEXTEND,
+	FIO_NODISKUTIL  		= 1 << __FIO_NODISKUTIL,
+	FIO_UNIDIR			= 1 << __FIO_UNIDIR,
+	FIO_NOIO			= 1 << __FIO_NOIO,
+	FIO_PIPEIO			= 1 << __FIO_PIPEIO,
+	FIO_BARRIER			= 1 << __FIO_BARRIER,
+	FIO_MEMALIGN			= 1 << __FIO_MEMALIGN,
+	FIO_BIT_BASED			= 1 << __FIO_BIT_BASED,
+	FIO_FAKEIO			= 1 << __FIO_FAKEIO,
+	FIO_NOSTATS			= 1 << __FIO_NOSTATS,
+	FIO_NOFILEHASH			= 1 << __FIO_NOFILEHASH,
+	FIO_ASYNCIO_SYNC_TRIM		= 1 << __FIO_ASYNCIO_SYNC_TRIM,
+	FIO_NO_OFFLOAD			= 1 << __FIO_NO_OFFLOAD,
+	FIO_ASYNCIO_SETS_ISSUE_TIME	= 1 << __FIO_ASYNCIO_SETS_ISSUE_TIME,
+	FIO_SKIPPABLE_IOMEM_ALLOC	= 1 << __FIO_SKIPPABLE_IOMEM_ALLOC,
+	FIO_RO_NEEDS_RW_OPEN		= 1 << __FIO_RO_NEEDS_RW_OPEN,
+	FIO_MULTI_RANGE_TRIM		= 1 << __FIO_MULTI_RANGE_TRIM,
 };
 
 /*

libfio.c

@@ -378,6 +378,7 @@ int initialize_fio(char *envp[])
 	compiletime_assert((offsetof(struct jobs_eta, m_rate) % 8) == 0, "m_rate");
 
 	compiletime_assert(__TD_F_LAST <= TD_ENG_FLAG_SHIFT, "TD_ENG_FLAG_SHIFT");
+	compiletime_assert((__TD_F_LAST + __FIO_IOENGINE_F_LAST) <= 8*sizeof(((struct thread_data *)0)->flags), "td->flags");
 	compiletime_assert(BSSPLIT_MAX <= ZONESPLIT_MAX, "bsssplit/zone max");
 
 	err = endian_check();