diff mbox

[4/4] block_int.h: Provide documentation for common block qdev properties

Message ID 16bc7e2dee53c9f43f50471615582d8aeb0ab4b3.1290706012.git.amit.shah@redhat.com
State New
Headers show

Commit Message

Amit Shah Nov. 25, 2010, 5:31 p.m. UTC 
Document the options common to all block devices.

This comes from Kevin.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
---
 block_int.h |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
diff mbox

Patch

diff --git a/block_int.h b/block_int.h
index 88a2546..867c4e2 100644
--- a/block_int.h
+++ b/block_int.h
@@ -243,12 +243,14 @@  static inline unsigned int get_physical_block_exp(BlockConf *conf)
 }
 
 #define DEFINE_BLOCK_PROPERTIES(_state, _conf)                          \
-    DEFINE_PROP_DRIVE("drive", _state, _conf.bs, ""),                   \
-    DEFINE_PROP_UINT16("logical_block_size", _state,                    \
-                       _conf.logical_block_size, 512, ""),              \
+    DEFINE_PROP_DRIVE("drive", _state, _conf.bs, "The host drive details, specified by the -drive parameter"), \
+    DEFINE_PROP_UINT16("logical_block_size", _state, _conf.logical_block_size, \
+                       512, "Logical sector size of the disk"),         \
     DEFINE_PROP_UINT16("physical_block_size", _state,                   \
-                       _conf.physical_block_size, 512, ""),             \
-    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0, ""), \
-    DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0, "")
+                       _conf.physical_block_size, 512, "Physical sector size of the disk"), \
+    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0,     \
+                       "Minimal size for IO requests in bytes. Must be a power of two that is 512 or greater."), \
+    DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0,     \
+                       "Size for IO requests that provides optimal performance (in bytes). Must be a power of two that is 512 or greater.")
 
 #endif /* BLOCK_INT_H */