dtrace discuss - Oct 2007 - what''s the difference between b_blkno and b_lblkno of bufinto_t structure

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In a 64-bit kernel, they are the same. In a 32-bit kernel, b_blkno
is the whole 64 bit block number, while b_lblkno is the lower 32
bits.

Sam Wan wrote:
> Dear experts,
> 
>    Could you pls tell me what''s the difference between b_blkno and
> b_lblkno of bufinto_t structure as there''s no clear explanation in
the
> Dtrace Guide.
>  
>  typedef struct bufinfo {
>     int b_flags;         /* flags */
>     size_t b_bcount;     /* number of bytes */
>     caddr_t b_addr;      /* buffer address */
>     *uint64_t b_blkno;    /* expanded block # on device */*
>     *uint64_t b_lblkno;   /* block # on device */*
>     size_t b_resid;      /* # of bytes not transferred */
>     size_t b_bufsize;    /* size of allocated buffer */
>     caddr_t b_iodone;    /* I/O completion routine */
>     dev_t b_edev;        /* extended device */
>  } bufinfo_t;
> 
>     more detailed the better.
>     Thanks and best regards.
> 
> Sam
> 
> -- 
> 
> <http://www.sun.com/>
> 
> 	
> 
> *Sam Wan** - System Support Engineer*
> * Sun Microsystems (China),Chengdu Office*
> Add: Suite C, 11/F, Chuan Xin Mansion, No.18 Sec.2  Ren Min S.Rd,  
> Chengdu,China. 610016
> Tel: 86-28-86199333 ext. 84243
> Fax: 86-28-86199333
> Mobile: 86-13980681947
> Email: wan.sam at sun.com <mailto:wan.sam at sun.com>
> MSN: wan_sam at hotmail.com <mailto:wan_sam at hotmail.com>
> 
> <http://www.sun.com/>
> 
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
blu

"You''ve added a new disk. Do you want to replace your current
drive, protect your data from a drive failure or expand your
storage capacity?" - Disk management as it should be.
----------------------------------------------------------------------
Brian Utterback - Solaris RPE, Sun Microsystems, Inc.
Ph:877-259-7345, Em:brian.utterback-at-ess-you-enn-dot-kom