Currently CEPH_HAVE_SETPIPE_SZ is not set even if F_SETPIPE_SZ is
available, because AC_COMPILE_IFELSE test program as written always
fails to compile. F_SETPIPE_SZ is a macro, so use AC_EGREP_CPP which
works on the preprocessor output instead of trying to compile.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Working around missing integer types is pretty easy. For example, the
__u32 family are Linux-specific types, and using these in Ceph
internally is fine because we can typedef them.
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
Adds a ceph_spinlock_t implementation that will use pthread_spinlock_t
if available, and otherwise reverts to pthread_mutex_t. Note that this
spinlock is not intended to be used in process-shared memory.
Switches implementation in:
ceph_context
SimpleMessenger
atomic_t
Only ceph_context initialized its spinlock with PTHREAD_PROCESS_SHARED.
However, there does not appear to be any instance in which CephContext
is allocated in shared memory, and thus can use the default private
memory space behavior.
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
get_linux_version() returns a version of the currently running kernel,
encoded as in int, and is contained in common/linux_version.[ch].
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Break up AC_CHECK_HEADERS macro into one header-file per line so it's
easier to read and make changes.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Currently the way 'rbd unmap' translates a user-provided block device
into an rbd id is it matches the major number of the specified device
against /sys/bus/rbd/devices/<id>/major for each rbd mapping and
declares success on the first match. This works for both entire disks
and partitions, because under the current device number allocation
scheme, each mapping means a new major number.
In preparation for support for single-major device number allocation
scheme, which would require matching both major and minor numbers, make
sure to always match against entire disk device numbers, by converting
the specified device major:minor pair into wholdedisk major:minor pair.
To achive that, use the libblkid library, which accomplishes this goal
by walking stable sysfs structures.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Checking for fdatasync uses the same approach as the qemu configure
script. The relevant commit is d1722a27f552a22561104210e0afad4577878e53.
Here is a copy of the commit message which explains the check:
Under Darwin, a symbol exists for the fdatasync() function, so that our
link test succeeds. However _POSIX_SYNCHRONIZED_IO is set to '-1'.
According to POSIX:2008, a value of -1 means the feature is not
supported.
A value of 0 means supported at compilation time, and a value greater 0
means supported at both compilation and run time.
Enable fdatasync() only if _POSIX_SYNCHRONIZED_IO is '>0'.
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
Make sure the requested length is below the maximum pipe size for now,
since we're only using one pipe and splicing once into and out of
it. The default max is 1MB on recent kernels, so this isn't such a
terrible limitation.
To get around this we could use multiple pipes, or keep both source and
destination fds open at the same time and call splice many times. This
is more usual usage for splice, but would require a lot more work to
restructure the filestore and messenger to handle it.
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
check for the existence of boost_program_options library in
configure.ac since several files need that library
Signed-off-by: Xing Lin <xinglin@cs.utah.edu>
Selects __PRETTY_FUNCTION__ or __func__. Linux assumes GNU, and chooses
__PRETTY_FUNCTION__ if gcc/g++ versions are favorable.
This also includes a fix in ax_c_var_func.m4:
AC_TRY_COMPILE will wrap the test in main{}, and then GCC will complain
about nested functions. Just use the original main{} body.
diff --git a/m4/ax_c_var_func.m4 b/m4/ax_c_var_func.m4
index 0ad7d2b..8b57563 100644
--- a/m4/ax_c_var_func.m4
+++ b/m4/ax_c_var_func.m4
@@ -57,9 +57,9 @@ AC_DEFUN([AX_C_VAR_FUNC],
[AC_REQUIRE([AC_PROG_CC])
AC_CACHE_CHECK(whether $CC recognizes __func__, ac_cv_c_var_func,
AC_TRY_COMPILE(,
-[int main() {
+[
char *s = __func__;
-}],
+],
AC_DEFINE(HAVE_FUNC,,
[Define if the C complier supports __func__]) ac_cv_c_var_func=yes,
ac_cv_c_var_func=no) )
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
Creates a test that checks explicitly for res_nquery, which can be a
macro in resolv.h. Defines RESOLV_LIBS that contains any libraries that
need to be linked against.
Notes from later fix:
Based on the 2013-09-30 version of wip-port. On FreeBSD, one must
include netinet/in.h to get the definitions for stuff in resolv.h.
Also, resolv.h's functions are part of libc instead of libresolv.
Signed-off-by: Alan Somers <asomers@gmail.com>
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
Function `get_process_name` has platform specific dependencies. Check
for Linux prctl function and correct command flag.
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
