git: DragonFly_RELEASE_3_8 kernel - Fix sendfile() bugs / nginx
Matthew Dillon
dillon at crater.dragonflybsd.org
Sat Aug 23 11:01:43 PDT 2014
commit d3239e3cf3ba0a4d24020f9ca0fb5dde8faff3b1
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date: Sat Aug 23 10:53:25 2014 -0700
kernel - Fix sendfile() bugs / nginx
* Fix a sendfile() bug tickled by nginx. When sending partial file bodies the
nbytes test was improperly included the header bytes in its file body limit
test. This caused sendfile() to return 0 (complete success) but not
actually output the entirety of the requested file segment.
* sendfile() now holds VM pages instead of wiring them. Wiring the pages
prevents truncation operations from succeeded and can further cause a
kernel panic if the underlying file is deleted and the descriptor is
closed while mbufs related to the sendfile() are still pending on the
socket.
Massive-debugging-by: joris
Summary of changes:
sys/kern/uipc_syscalls.c | 43 +++++++++++++++++++++++++++----------------
1 file changed, 27 insertions(+), 16 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d3239e3cf3ba0a4d24020f9ca0fb5dde8faff3b1
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