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  1. 08 Feb, 2008 4 commits
    • Linus Torvalds's avatar
      Merge git://git.linux-nfs.org/pub/linux/nfs-2.6 · a6a852e9
      Linus Torvalds authored 
      * git://git.linux-nfs.org/pub/linux/nfs-2.6:
  SUNRPC xptrdma: simplify build configuration
  NFS: Fix a potential file corruption issue when writing
      a6a852e9
    • David Sterba's avatar
      ipwireless: driver for PC Card 3G/UMTS modem · 099dc4fb
      David Sterba authored 
      The device is manufactured by IPWireless.  In some countries (for
example Czech Republic, T-Mobile ISP) this card is shipped for service
called UMTS 4G.

It's a piece of PCMCIA "4G" UMTS PPP networking hardware that presents
itself as a serial character device (i.e.  looks like usual modem to
userspace, accepts AT commands, etc).
Rewieved-by: default avatarJiri Slaby <jslaby@suse.cz>
Signed-off-by: default avatarBen Martel <benm@symmetric.co.nz>
Signed-off-by: default avatarStephen Blackheath <stephen@symmetric.co.nz>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.cz>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      099dc4fb
    • James Lentini's avatar
      SUNRPC xptrdma: simplify build configuration · 3211e4eb
      James Lentini authored 
      
Trond and Bruce,

This is a patch for 2.6.25. This is the same version that was sent out
on December 12 for review (no comments to date).

To simplify the RPC/RDMA client and server build configuration, make
SUNRPC_XPRT_RDMA a hidden config option that continues to depend on
SUNRPC and INFINIBAND. The value of SUNRPC_XPRT_RDMA will be:

 - N if either SUNRPC or INFINIBAND are N
 - M if both SUNRPC and INFINIBAND are on (M or Y) and at least one is M
 - Y if both SUNRPC and INFINIBAND are Y

In 2.6.25, all of the RPC/RDMA related files are grouped in
net/sunrpc/xprtrdma and the net/sunrpc/xprtrdma/Makefile builds both
the client and server RPC/RDMA support using this config option.
Signed-off-by: default avatarJames Lentini <jlentini@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      3211e4eb
    • Trond Myklebust's avatar
      NFS: Fix a potential file corruption issue when writing · 5d47a356
      Trond Myklebust authored 
      If the inode is flagged as having an invalid mapping, then we can't rely on
the PageUptodate() flag. Ensure that we don't use the "anti-fragmentation"
write optimisation in nfs_updatepage(), since that will cause NFS to write
out areas of the page that are no longer guaranteed to be up to date.

A potential corruption could occur in the following scenario:

client 1			client 2
===============			===============
				fd=open("f",O_CREAT|O_WRONLY,0644);
				write(fd,"fubar\n",6);	// cache last page
				close(fd);
fd=open("f",O_WRONLY|O_APPEND);
write(fd,"foo\n",4);
close(fd);

				fd=open("f",O_WRONLY|O_APPEND);
				write(fd,"bar\n",4);
				close(fd);
-----
The bug may lead to the file "f" reading 'fubar\n\0\0\0\nbar\n' because
client 2 does not update the cached page after re-opening the file for
write. Instead it keeps it marked as PageUptodate() until someone calls
invaldate_inode_pages2() (typically by calling read()).
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      5d47a356
  3. 07 Feb, 2008 36 commits
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