Don't think there are any global array of block_devices in 2.6 as it was in 2.4 If you are writing a driver or working on a kernel code, then you should be able to get the block_device bdev corresponding to a /dev/hdx that was opened - from inode->bdev. Don't have to open the device in your driver code though! Hope this helps. Thanks, Vinod On Thu, 07 Oct 2004 Ahmed A wrote : >Hi, > >blksize_size, hardsect_size etc. does not exist in >2.6. I am looking for the info that was contained in >these global variables in Kernel 2.4. > >Regards, >Ahmed. > > >--- Bijoy Thomas <bijoyjth@xxxxxxx> wrote: > > > > > Hi, > > > > What kind of information are you looking for once > > you give /dev/hda as input? > > > > There are two arrays called hardsect_size and > > blksize_size in the kernel that store information > > regarding a block device. hardsect_size[3][N] will > > give you the sector size of /dev/hdaN. > > blksize_size[m][n] gives you the blocksize for a > > block device with major number m and minor number n. > > Hope this helps. > > > > Regards, > > Bijoy. > > > > ----- Original Message ----- > > From: Ahmed A <ahmedcali@xxxxxxxxx> > > Date: Thursday, October 7, 2004 0:47 am > > Subject: Re: Association between block device and > > block_device struct > > > > > > > > Hi, > > > > > > I was wondering if there is an alternate way than > > > opening a file in kernel space. I am not sure if > > I > > > can effectively open an device (the block device > > > specifically) in kernel space. > > > > > > Is there a global array variable of all the block > > > devices recognized by the kernel that I can scan > > to > > > find out the the exact one for a corresponding dev > > > entry (e.g /dev/hda). This is for 2.6 kernel. > > > > > > Regards, > > > Ahmed. > > > > > > --- Vinod Sreedharan > > <vinod.sreedharan@xxxxxxxxxxxxxx> > > > wrote: > > > > > > > Ahmed, > > > > > > > > inode->i_bdev will give you block_device for any > > > > opened device file, > > > > since during open file->dentry->inode > > association > > > > has already been made. > > > > > > > > Thanks, > > > > Vinod > > > > > > > > On Thu, 07 Oct 2004 Ahmed A wrote : > > > > >Hello, > > > > > > > > > >I am trying to find the corresponding > > block_device > > > > >struct for a certain block device (e.g. > > /dev/hda) > > > > in > > > > >2.6. Is there a way I can find the > > association. > > > > > > > > > >If not, can someone suggest some code, by which > > > > give a > > > > >block device name (e.g. hda), I can find out > > it's > > > > >corresponding block_device struct. I was > > thinking > > > > of > > > > >one approach - "open" the block devive, get a > > file > > > > >pointer back, and from that obtain the > > block_device > > > > >pointer. Any code sample or pointers would be > > > > highly > > > > >appreciated. > > > > > > > > > >Regards, > > > > >Ahmed. > > > > > > > > > > > > > > > > > > > > > > > > >_______________________________ > > > > >Do you Yahoo!? > > > > >Declare Yourself - Register online to vote > > today! > > > > >http://vote.yahoo.com > > > > > > > > > >-- > > > > >Kernelnewbies: Help each other learn about the > > > > Linux kernel. > > > > >Archive: > > > > http://mail.nl.linux.org/kernelnewbies/ > > > > >FAQ: http://kernelnewbies.org/faq/ > > > > > > > > > > > > > > > > > > > > > > > > __________________________________ > > > Do you Yahoo!? > > > Yahoo! Mail Address AutoComplete - You start. We > > finish. > > > http://promotions.yahoo.com/new_mail > > > > > > -- > > > Kernelnewbies: Help each other learn about the > > Linux kernel. > > > Archive: > > http://mail.nl.linux.org/kernelnewbies/ > > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > > > > > > -- > > Kernelnewbies: Help each other learn about the Linux > > kernel. > > Archive: > > http://mail.nl.linux.org/kernelnewbies/ > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > > >_______________________________ >Do you Yahoo!? >Declare Yourself - Register online to vote today! >http://vote.yahoo.com > >-- >Kernelnewbies: Help each other learn about the Linux kernel. >Archive: http://mail.nl.linux.org/kernelnewbies/ >FAQ: http://kernelnewbies.org/faq/ >
