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  1. 28 5月, 2014 1 次提交
  3. 02 4月, 2014 2 次提交
  5. 23 1月, 2014 1 次提交
    • M
      fuse: fix pipe_buf_operations · 28a625cb
      由 Miklos Szeredi 提交于 
      Having this struct in module memory could Oops when if the module is
unloaded while the buffer still persists in a pipe.

Since sock_pipe_buf_ops is essentially the same as fuse_dev_pipe_buf_steal
merge them into nosteal_pipe_buf_ops (this is the same as
default_pipe_buf_ops except stealing the page from the buffer is not
allowed).
Reported-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Cc: stable@vger.kernel.org
      28a625cb
  7. 25 10月, 2013 1 次提交
  9. 29 6月, 2013 3 次提交
  11. 24 6月, 2013 1 次提交
  13. 20 6月, 2013 1 次提交
  15. 10 4月, 2013 5 次提交
  17. 22 3月, 2013 1 次提交
  19. 04 3月, 2013 1 次提交
  21. 26 2月, 2013 1 次提交
  23. 23 2月, 2013 1 次提交
  25. 07 1月, 2013 1 次提交
    • E
      tcp: fix MSG_SENDPAGE_NOTLAST logic · ae62ca7b
      由 Eric Dumazet 提交于 
      commit 35f9c09f (tcp: tcp_sendpages() should call tcp_push() once)
added an internal flag : MSG_SENDPAGE_NOTLAST meant to be set on all
frags but the last one for a splice() call.

The condition used to set the flag in pipe_to_sendpage() relied on
splice() user passing the exact number of bytes present in the pipe,
or a smaller one.

But some programs pass an arbitrary high value, and the test fails.

The effect of this bug is a lack of tcp_push() at the end of a
splice(pipe -> socket) call, and possibly very slow or erratic TCP
sessions.

We should both test sd->total_len and fact that another fragment
is in the pipe (pipe->nrbufs > 1)

Many thanks to Willy for providing very clear bug report, bisection
and test programs.
Reported-by: NWilly Tarreau <w@1wt.eu>
Bisected-by: NWilly Tarreau <w@1wt.eu>
Tested-by: NWilly Tarreau <w@1wt.eu>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      ae62ca7b
  27. 12 12月, 2012 1 次提交
  29. 27 9月, 2012 1 次提交
  31. 31 7月, 2012 1 次提交
  33. 14 6月, 2012 1 次提交
    • E
      splice: fix racy pipe->buffers uses · 047fe360
      由 Eric Dumazet 提交于 
      Dave Jones reported a kernel BUG at mm/slub.c:3474! triggered
by splice_shrink_spd() called from vmsplice_to_pipe()

commit 35f3d14d (pipe: add support for shrinking and growing pipes)
added capability to adjust pipe->buffers.

Problem is some paths don't hold pipe mutex and assume pipe->buffers
doesn't change for their duration.

Fix this by adding nr_pages_max field in struct splice_pipe_desc, and
use it in place of pipe->buffers where appropriate.

splice_shrink_spd() loses its struct pipe_inode_info argument.
Reported-by: NDave Jones <davej@redhat.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Tom Herbert <therbert@google.com>
Cc: stable <stable@vger.kernel.org> # 2.6.35
Tested-by: NDave Jones <davej@redhat.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
      047fe360
  35. 02 6月, 2012 1 次提交
    • J
      fs: introduce inode operation ->update_time · c3b2da31
      由 Josef Bacik 提交于 
      Btrfs has to make sure we have space to allocate new blocks in order to modify
the inode, so updating time can fail.  We've gotten around this by having our
own file_update_time but this is kind of a pain, and Christoph has indicated he
would like to make xfs do something different with atime updates.  So introduce
->update_time, where we will deal with i_version an a/m/c time updates and
indicate which changes need to be made.  The normal version just does what it
has always done, updates the time and marks the inode dirty, and then
filesystems can choose to do something different.

I've gone through all of the users of file_update_time and made them check for
errors with the exception of the fault code since it's complicated and I wasn't
quite sure what to do there, also Jan is going to be pushing the file time
updates into page_mkwrite for those who have it so that should satisfy btrfs and
make it not a big deal to check the file_update_time() return code in the
generic fault path. Thanks,
Signed-off-by: NJosef Bacik <josef@redhat.com>
      c3b2da31
  37. 20 4月, 2012 1 次提交
    • E
      vmsplice: relax alignement requirements for SPLICE_F_GIFT · bd1a68b5
      由 Eric Dumazet 提交于 
      It seems there is no fundamental reason to limit vmsplice()
SPLICE_F_GIFT to page aligned chunks.

All helpers are prepared to cope with offsets in page.

This limitation makes vmsplice() API very impractical in the zero-copy
land.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Miller <davem@davemloft.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: Changli Gao <xiaosuo@gmail.com>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
      bd1a68b5
  39. 06 4月, 2012 1 次提交
    • E
      tcp: tcp_sendpages() should call tcp_push() once · 35f9c09f
      由 Eric Dumazet 提交于 
      commit 2f533844 (tcp: allow splice() to build full TSO packets) added
a regression for splice() calls using SPLICE_F_MORE.

We need to call tcp_flush() at the end of the last page processed in
tcp_sendpages(), or else transmits can be deferred and future sends
stall.

Add a new internal flag, MSG_SENDPAGE_NOTLAST, acting like MSG_MORE, but
with different semantic.

For all sendpage() providers, its a transparent change. Only
sock_sendpage() and tcp_sendpages() can differentiate the two different
flags provided by pipe_to_sendpage()
Reported-by: NTom Herbert <therbert@google.com>
Cc: Nandita Dukkipati <nanditad@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: H.K. Jerry Chu <hkchu@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail&gt;com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      35f9c09f
  41. 20 3月, 2012 1 次提交
  43. 29 2月, 2012 1 次提交
  45. 04 1月, 2012 1 次提交
  47. 26 7月, 2011 1 次提交
  49. 24 5月, 2011 1 次提交
  51. 17 12月, 2010 1 次提交
  53. 29 11月, 2010 2 次提交
    • L
      Export 'get_pipe_info()' to other users · c66fb347
      由 Linus Torvalds 提交于 
      And in particular, use it in 'pipe_fcntl()'.

The other pipe functions do not need to use the 'careful' version, since
they are only ever called for things that are already known to be pipes.

The normal read/write/ioctl functions are called through the file
operations structures, so if a file isn't a pipe, they'd never get
called.  But pipe_fcntl() is special, and called directly from the
generic fcntl code, and needs to use the same careful function that the
splice code is using.

Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c66fb347
    • L
      Rename 'pipe_info()' to 'get_pipe_info()' · 71993e62
      由 Linus Torvalds 提交于 
      .. and change it to take the 'file' pointer instead of an inode, since
that's what all users want anyway.

The renaming is preparatory to exporting it to other users.  The old
'pipe_info()' name was too generic and is already used elsewhere, so
before making the function public we need to use a more specific name.

Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      71993e62
  55. 08 8月, 2010 2 次提交
  57. 30 6月, 2010 2 次提交
  59. 25 5月, 2010 1 次提交