* called "optimistic" to speed up opens. Rule-of-thumb is to use it
* only for read-only opens of small files (< 1KB).
*/
-#define FILEIO_OPEN_OPTIMISTIC_LOCK (1 << 22)
+#define FILEIO_OPEN_OPTIMISTIC_LOCK (1 << 22) // 0x00400000
-// Flag passed to open() to enable use of oplocks on VMFS. This definition
-// must match USEROBJ_OPEN_OPTIMISTIC_LOCK in user_vsiTypes.h.
+/*
+ * Flag passed to open() to enable use of oplocks on VMFS. This definition
+ * must match USEROBJ_OPEN_OPTIMISTIC_LOCK in user_vsiTypes.h.
+ */
#define O_OPTIMISTIC_LOCK (1 << 22) // 0x00400000
/*
* POSIX specific close the file descriptor when the program uses a variant
* of the exec system call capability. This is useful in fork/exec scenarios.
*/
-#define FILEIO_OPEN_CLOSE_ON_EXEC (1 << 23)
+#define FILEIO_OPEN_CLOSE_ON_EXEC (1 << 23) // 0x00800000
/*
* Flag passed to open() to not attempt to get the LUN attributes as part of
* user_vsiTypes.h and FS_OPEN_NOATTR in fs_public.h
*/
#define O_NOATTR (1 << 26) // 0x04000000
-// Flag passed to open() to get multiwriter VMFS lock. This definition must
-// match USEROBJ_OPEN_MULTIWRITER_LOCK in user_vsiTypes.h.
-#define O_MULTIWRITER_LOCK (1 << 27) //0x08000000
-// Flag passed to open() to get exclusive VMFS lock. This definition must
-// match USEROBJ_OPEN_EXCLUSIVE_LOCK in user_vsiTypes.h.
+
+/*
+ * Flag passed to open() to get multiwriter VMFS lock. This definition must
+ * match USEROBJ_OPEN_MULTIWRITER_LOCK in user_vsiTypes.h.
+ */
+
+#define O_MULTIWRITER_LOCK (1 << 27) // 0x08000000
+
+/*
+ * Flag passed to open() to get exclusive VMFS lock. This definition must
+ * match USEROBJ_OPEN_EXCLUSIVE_LOCK in user_vsiTypes.h.
+ */
+
#define O_EXCLUSIVE_LOCK (1 << 28) // 0x10000000
/* File Access check args */