linux-stable.git/fs/ceph/addr.c, branch linux-3.7.y

libceph: Unlock unprocessed pages in start_read() error path

2013-01-17T16:46:50+00:00

(cherry picked from commit 8884d53dd63b1d9315b343564fcbe1ede004a99e)

Function start_read() can get an error before processing all pages.
It must not only release the remaining pages, but unlock them too.

This fixes http://tracker.newdream.net/issues/3370

Signed-off-by: David Zafman 
Reviewed-by: Alex Elder 
Signed-off-by: Greg Kroah-Hartman

mm: kill vma flag VM_CAN_NONLINEAR

2012-10-09T07:22:17+00:00

Move actual pte filling for non-linear file mappings into the new special
vma operation: ->remap_pages().

Filesystems must implement this method to get non-linear mapping support,
if it uses filemap_fault() then generic_file_remap_pages() can be used.

Now device drivers can implement this method and obtain nonlinear vma support.

Signed-off-by: Konstantin Khlebnikov 
Cc: Alexander Viro 
Cc: Carsten Otte 
Cc: Chris Metcalf 	#arch/tile
Cc: Cyrill Gorcunov 
Cc: Eric Paris 
Cc: H. Peter Anvin 
Cc: Hugh Dickins 
Cc: Ingo Molnar 
Cc: James Morris 
Cc: Jason Baron 
Cc: Kentaro Takeda 
Cc: Matt Helsley 
Cc: Nick Piggin 
Cc: Oleg Nesterov 
Cc: Peter Zijlstra 
Cc: Robert Richter 
Cc: Suresh Siddha 
Cc: Tetsuo Handa 
Cc: Venkatesh Pallipadi 
Acked-by: Linus Torvalds 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ceph: avoid 32-bit page index overflow

2012-10-03T15:51:18+00:00

A pgoff_t is defined (by default) to have type (unsigned long).  On
architectures such as i686 that's a 32-bit type.  The ceph address
space code was attempting to produce 64 bit offsets by shifting a
page's index by PAGE_CACHE_SHIFT, but the result was not what was
desired because the shift occurred before the result got promoted
to 64 bits.

Fix this by converting all uses of page->index used in this way to
use the page_offset() macro, which ensures the 64-bit result has the
intended value.

This fixes http://tracker.newdream.net/issues/3112

Reported-by:  Mohamed Pakkeer 
Signed-off-by: Alex Elder 
Reviewed-by: Sage Weil

ceph: propagate layout error on osd request creation

2012-10-01T22:20:00+00:00

If we are creating an osd request and get an invalid layout, return
an EINVAL to the caller.  We switch up the return to have an error
code instead of NULL implying -ENOMEM.

Signed-off-by: Sage Weil 
Reviewed-by: Alex Elder

ceph: Push file_update_time() into ceph_page_mkwrite()

2012-07-30T21:02:45+00:00

CC: Sage Weil 
CC: ceph-devel@vger.kernel.org
Acked-by: Sage Weil 
Signed-off-by: Jan Kara 
Signed-off-by: Al Viro

ceph: check PG_Private flag before accessing page->private

2012-06-20T12:43:48+00:00

I got lots of NULL pointer dereference Oops when compiling kernel on ceph.
The bug is because the kernel page migration routine replaces some pages
in the page cache with new pages, these new pages' private can be non-zero.

Signed-off-by: Zheng Yan 
Signed-off-by: Sage Weil 
(cherry picked from commit 28c0254ede13ab575d2df5c6585ed3d4817c3e6b)

ceph: use i_ceph_lock instead of i_lock

2011-12-07T18:46:44+00:00

We have been using i_lock to protect all kinds of data structures in the
ceph_inode_info struct, including lists of inodes that we need to iterate
over while avoiding races with inode destruction.  That requires grabbing
a reference to the inode with the list lock protected, but igrab() now
takes i_lock to check the inode flags.

Changing the list lock ordering would be a painful process.

However, using a ceph-specific i_ceph_lock in the ceph inode instead of
i_lock is a simple mechanical change and avoids the ordering constraints
imposed by igrab().

Reported-by: Amon Ott 
Signed-off-by: Sage Weil

libceph: fix double-free of page vector

2011-10-25T23:10:17+00:00

ceph_release_page_vector() kfrees the vector; we shouldn't do it here too.

Reported-by: Jeff Wu 
Signed-off-by: Sage Weil

ceph: implement (optional) max read size

2011-10-25T23:10:15+00:00

The 'rsize' mount option limits the maximum size of an individual
read(ahead) operation that is sent off to an OSD.  This is distinct from
'rasize', which controls the size of the readahead window.

Signed-off-by: Sage Weil

ceph: make readpages fully async

2011-10-25T23:10:14+00:00

When we get a ->readpages() aop, submit async reads for all page ranges
in the provided page list.  Lock the pages immediately, so that VFS/MM
will block until the reads complete.

Signed-off-by: Sage Weil