[PATCH 15/18] evnfs: introduce major and minor

[Jean-Christophe PLAGNIOL-VILLARD]

On 16:12 Mon 27 Aug     , Sascha Hauer wrote:
> On Fri, Aug 24, 2012 at 06:50:15AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > they are store in the super block at byte 16th and 17th.
> > 
> > set the verison at 0.1
> 
> Only this little comment makes clear that with major and minor you mean
> a version. I first thought about device nodes...
> 
> > 
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> > ---
> >  common/environment.c |    2 ++
> >  include/envfs.h      |    7 ++++++-
> >  2 files changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/common/environment.c b/common/environment.c
> > index 52ce0de..257f35f 100644
> > --- a/common/environment.c
> > +++ b/common/environment.c
> > @@ -125,6 +125,8 @@ int envfs_save(char *filename, char *dirname)
> >  
> >  	super = (struct envfs_super *)buf;
> >  	super->magic = ENVFS_32(ENVFS_MAGIC);
> > +	super->major = ENVFS_32(ENVFS_MAJOR);
> > +	super->minor = ENVFS_32(ENVFS_MINOR);
> 
> major and minor are 8bit wide but you read 32?
yep
> 
> >  	super->size = ENVFS_32(size);
> >  
> >  	/* second pass: copy files to buffer */
> > diff --git a/include/envfs.h b/include/envfs.h
> > index ba976d6..c6df8c5 100644
> > --- a/include/envfs.h
> > +++ b/include/envfs.h
> > @@ -5,6 +5,9 @@
> >  #include <asm/byteorder.h>
> >  #endif
> >  
> > +#define ENVFS_MAJOR		0
> > +#define ENVFS_MINOR		1
> > +
> >  #define ENVFS_MAGIC		    0x798fba79	/* some random number */
> >  #define ENVFS_INODE_MAGIC	0x67a8c78d
> >  #define ENVFS_END_MAGIC		0x6a87d6cd
> > @@ -29,8 +32,10 @@ struct envfs_super {
> >  	uint32_t priority;
> >  	uint32_t crc;			/* crc for the data */
> >  	uint32_t size;			/* size of data */
> > +	uint8_t major;			/* major */
> > +	uint8_t minor;			/* minor */
> > +	uint16_t future;		/* reserved for future use */
> >  	uint32_t flags;			/* feature flags */
> > -	uint32_t future;		/* reserved for future use */
> 
> Why do you move the position of the flags field in envfs_super?
keep all non-use data together flags not used too

Best Regards,
J.