[PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[Luke Kenneth Casson Leighton]

i do not know if this does any damage (and i'm going to find out!)

i seek to use these two functions from an experimental kernel module: i
get warnings about "symbol not found" without this patch:


Index: fs/read_write.c
===================================================================
RCS file: /cvsroot/selinux/nsa/linux-2.6/fs/read_write.c,v
retrieving revision 1.1.1.6
diff -u -3 -p -u -r1.1.1.6 read_write.c
--- fs/read_write.c	18 Jun 2004 19:30:06 -0000	1.1.1.6
+++ fs/read_write.c	29 Sep 2004 12:45:31 -0000
@@ -318,6 +318,7 @@ asmlinkage ssize_t sys_pread64(unsigned 
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(sys_pread64);
 
 asmlinkage ssize_t sys_pwrite64(unsigned int fd, const char __user *buf,
 			      size_t count, loff_t pos)
@@ -337,6 +338,7 @@ asmlinkage ssize_t sys_pwrite64(unsigned
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(sys_pwrite64);
 
 /*
  * Reduce an iovec's length in-place.  Return the resulting number of segments


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Re: [PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[Arjan van de Ven]

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On Wed, 2004-09-29 at 14:58, Luke Kenneth Casson Leighton wrote:
> i do not know if this does any damage (and i'm going to find out!)
> 
> i seek to use these two functions from an experimental kernel module: i
> get warnings about "symbol not found" without this patch:
> 

what on earth are you doing in your module??????


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Re: [PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[Luke Kenneth Casson Leighton]

On Wed, Sep 29, 2004 at 02:59:30PM +0200, Arjan van de Ven wrote:
> On Wed, 2004-09-29 at 14:58, Luke Kenneth Casson Leighton wrote:
> > i do not know if this does any damage (and i'm going to find out!)
> > 
> > i seek to use these two functions from an experimental kernel module: i
> > get warnings about "symbol not found" without this patch:
> > 
> 
> what on earth are you doing in your module??????
 
 prefixing a new root onto the front of the file name and then
 re-issuing (proxying) a request.
 
 all file requests, all stats, all opendirs, everything.

 i'm hacking fuse in an attempt to remove the userspace bits,
 merging the functionality of the userspace "fusexmp" - fuse
 example program - into the fuse kernel module.

 l.

 p.s.  if someone fixes the ioctl bug BLKRRDPART on a usb scsi
	   storage device which has been umounted with a "-l"
	   option, then i don't have to do all this work.

	 bugs.debian.org no #273055.

-- 
--
Truth, honesty and respect are rare commodities that all spring from
the same well: Love.  If you love yourself and everyone and everything
around you, funnily and coincidentally enough, life gets a lot better.
--
<a href="http://lkcl.net">      lkcl.net      </a> <br />
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Re: [PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[Luke Kenneth Casson Leighton]

On Wed, Sep 29, 2004 at 02:59:30PM +0200, Arjan van de Ven wrote:
> On Wed, 2004-09-29 at 14:58, Luke Kenneth Casson Leighton wrote:
> > i do not know if this does any damage (and i'm going to find out!)
> > 
> > i seek to use these two functions from an experimental kernel module: i
> > get warnings about "symbol not found" without this patch:
> > 
> 
> what on earth are you doing in your module??????
 
 ... if i feel like giving up i will of course try something like
 install the selinux-enabled nfs server plus nfs client selinux patches,
 and mount the filesystem via 127.0.0.1.

 as a last resort.

-- 
--
Truth, honesty and respect are rare commodities that all spring from
the same well: Love.  If you love yourself and everyone and everything
around you, funnily and coincidentally enough, life gets a lot better.
--
<a href="http://lkcl.net">      lkcl.net      </a> <br />
<a href="mailto:lkcl@lkcl.net"> lkcl@lkcl.net </a> <br />

Re: [PATCH] to allow sys_pread64 and sys_pwrite64 to be used from modules

[Luke Kenneth Casson Leighton]

scratch that: i found that vfs_read along with filp_open and filp_close
would do the job.

having a ball :)

On Wed, Sep 29, 2004 at 01:58:35PM +0100, Luke Kenneth Casson Leighton wrote:
> i do not know if this does any damage (and i'm going to find out!)
> 
> i seek to use these two functions from an experimental kernel module: i
> get warnings about "symbol not found" without this patch:
> 
> 
> Index: fs/read_write.c
> ===================================================================
> RCS file: /cvsroot/selinux/nsa/linux-2.6/fs/read_write.c,v
> retrieving revision 1.1.1.6
> diff -u -3 -p -u -r1.1.1.6 read_write.c
> --- fs/read_write.c	18 Jun 2004 19:30:06 -0000	1.1.1.6
> +++ fs/read_write.c	29 Sep 2004 12:45:31 -0000
> @@ -318,6 +318,7 @@ asmlinkage ssize_t sys_pread64(unsigned 
>  
>  	return ret;
>  }
> +EXPORT_SYMBOL_GPL(sys_pread64);
>  
>  asmlinkage ssize_t sys_pwrite64(unsigned int fd, const char __user *buf,
>  			      size_t count, loff_t pos)
> @@ -337,6 +338,7 @@ asmlinkage ssize_t sys_pwrite64(unsigned
>  
>  	return ret;
>  }
> +EXPORT_SYMBOL_GPL(sys_pwrite64);
>  
>  /*
>   * Reduce an iovec's length in-place.  Return the resulting number of segments
> 
> 
> -- 
> --
> Truth, honesty and respect are rare commodities that all spring from
> the same well: Love.  If you love yourself and everyone and everything
> around you, funnily and coincidentally enough, life gets a lot better.
> --
> <a href="http://lkcl.net">      lkcl.net      </a> <br />
> <a href="mailto:lkcl@lkcl.net"> lkcl@lkcl.net </a> <br />
> 

-- 
--
Truth, honesty and respect are rare commodities that all spring from
the same well: Love.  If you love yourself and everyone and everything
around you, funnily and coincidentally enough, life gets a lot better.
--
<a href="http://lkcl.net">      lkcl.net      </a> <br />
<a href="mailto:lkcl@lkcl.net"> lkcl@lkcl.net </a> <br />