Modifying the filesystem code

Modifying the filesystem code

[dinesh bhaskar]

Hello all,

I am working on ramfs filesystem code. I would like to modify the directory
path while creating the file.
example when we give mkdir newfile; // this newfile should be present in
/newlabel/newfile
                             // Assuming ramfs is mounted at /, newlabel is
prefixed before the newfile

So i am trying to modify the functions defined in the struct
inode_operations for the directory.

static const struct inode_operations ramfs_dir_inode_operations = {
    .create     = ramfs_create,
    .lookup     = simple_lookup,
    .link       = simple_link,
    .unlink     = simple_unlink,
    .symlink    = ramfs_symlink,
    .mkdir      = ramfs_mkdir,
    .rmdir      = simple_rmdir,
    .mknod      = ramfs_mknod,   //Modifying this function to add the prefix
to the file
    .rename     = simple_rename,
};
is it possible?

Let me know if I am doing something wrong.


Thanks
Dinesh
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Modifying the filesystem code

[Rajat Sharma]

Dinesh,

I think it would be better if you can describe our aim of the task in
plain English without any technical details. May be people can suggest
you an altogether better approach, because its getting hard to know
what exactly you want to do, is it mkdir or create or both you are
interested in? If every creation has to be prefixed, may be you don't
have to even change any of inode operations.

In short, just come up with our aim statement in plain English.

Rajat

On Thu, Dec 30, 2010 at 11:22 AM, dinesh bhaskar <pdineshb@gmail.com> wrote:
>
> Hello all,
>
> I am working on ramfs filesystem code. I would like to modify the directory
> path while creating the file.
> example when we give mkdir newfile; // this newfile should be present in
> /newlabel/newfile
> ???????????????????????????? // Assuming ramfs is mounted at /, newlabel is
> prefixed before the newfile
>
> So i am trying to modify the functions defined in the struct
> inode_operations for the directory.
>
> static const struct inode_operations ramfs_dir_inode_operations = {
> ??? .create???? = ramfs_create,
> ??? .lookup???? = simple_lookup,
> ??? .link?????? = simple_link,
> ??? .unlink???? = simple_unlink,
> ??? .symlink??? = ramfs_symlink,
> ??? .mkdir????? = ramfs_mkdir,
> ??? .rmdir????? = simple_rmdir,
> ??? .mknod????? = ramfs_mknod,?? //Modifying this function to add the prefix
> to the file
> ??? .rename???? = simple_rename,
> };
> is it possible?
>
> Let me know if I am doing something wrong.
>
>
> Thanks
> Dinesh
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>

Modifying the filesystem code

[dinesh bhaskar]

Hello All,

I am trying to modify the path of the file while creating it. I was
modifying the mkdir function pointer in the inode_operations structure. Not
sure how to give the specific path to the file while creating it.


Thanks in advance
Dinesh
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Modifying the filesystem code

[Manish Katiyar]

On Wed, Dec 29, 2010 at 12:21 PM, dinesh bhaskar <pdineshb@gmail.com> wrote:
> Hello All,
>
> I am trying to modify the path of the file while creating it. I was
> modifying the mkdir function pointer in the inode_operations structure. Not
> sure how to give the specific path to the file while creating it.

Sorry, but your question is not clear to me. Perhaps rephrasing it
(with an example) will be better.


-- 
Thanks -
Manish
==================================
[$\*.^ -- I miss being one of them
==================================

Modifying the filesystem code

[dinesh bhaskar]

Manish,

On Wed, Dec 29, 2010 at 3:36 PM, Manish Katiyar <mkatiyar@gmail.com> wrote:

> On Wed, Dec 29, 2010 at 12:21 PM, dinesh bhaskar <pdineshb@gmail.com>
> wrote:
> > Hello All,
> >
> > I am trying to modify the path of the file while creating it. I was
> > modifying the mkdir function pointer in the inode_operations structure.
> Not
> > sure how to give the specific path to the file while creating it.
>
> Sorry, but your question is not clear to me. Perhaps rephrasing it
> (with an example) will be better.
>

I am working on ramfs filesystem code. I would like to modify the directory
path while creating the file.
example when we give mkdir newfile; // this newfile should be present in
/newlabel/newfile
                                                           // newlabel is
prefixed before the newfile


So i am trying to modify the functions defined in the struct
inode_operations for the directory.

static const struct inode_operations ramfs_dir_inode_operations = {
    .create     = ramfs_create,
    .lookup     = simple_lookup,
    .link       = simple_link,
    .unlink     = simple_unlink,
    .symlink    = ramfs_symlink,
    .mkdir      = ramfs_mkdir,
    .rmdir      = simple_rmdir,
    .mknod      = ramfs_mknod,   //Modifying this function to add the prefix
to the file
    .rename     = simple_rename,
};

Let me know if I am doing something wrong

Thanks
Dinesh



>
>
> --
> Thanks -
> Manish
> ==================================
> [$\*.^ -- I miss being one of them
> ==================================
>
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