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* Tests: portability fixes for ipc.tEmmanuel Dreyfus2015-03-301-2/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes portability problems in ipc.t so that it can run on NetBSD: 1) EOPNOTSUPP value is OS-dependent. Learn it from system headers instead of hard-coding it in the script 2) liglusterfs embbeds its own UUID implementation. The function name may be the same as in built(in implementation from libc, but with different prototype. In that case, we must make sure python will use libglusterfs's version, otherwise we will crash in libc's UUID code. Since dlopen() does not make any guarantee on what symbol will be used, me need to preload libglusterfs when loading python. This is done using LD_PRELOAD. 3) In python code we need to load with RTLD_GLOBAL global in order to have dependencies loaded 4) Python's ctypes.util.find_library does not lookup LD_LIBRARy_PATH and may therefore miss the library. On failure, retry with less portable but more reliable explicit name BUG: 1129939 Change-Id: I024cdfd03a5a42a8ec23de38a99e7349aba92ea8 Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org> Reviewed-on: http://review.gluster.org/9944 Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Venky Shankar <vshankar@redhat.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* every/where: add GF_FOP_IPC for inter-translator communicationJeff Darcy2015-03-171-0/+21
Several features - e.g. encryption, erasure codes, or NSR - involve multiple cooperating translators which sometimes need a "private" means of communication amongst themselves. Historically we've used virtual or synthetic xattrs, but that's not very elegant and clutters up the getxattr/setxattr path which must also handle real xattr requests. This new fop should address that. The only argument is an int32_t "op" which should be recognized by the target translator. It is recommended that translators using these feature follow some convention regarding the ops that they define, to avoid conflicts. Using a hash of the target translator's type string as a base for a series of ops would probably be a good start. Any other information can be passed in both directions using xdata. The default behavior for this fop, as with any other, is to pass through to FIRST_CHILD. That makes use of this fop "transparent" to other translators that were written before it existed, but it also means that it only really works with pass-through translators. If a routing translator (such as DHT) or a fan-out translator (such as AFR) is involved, the IPC might not reach its intended destination unless those translators are modified to forward IPC fops along all paths. If an IPC gets all the way to storage/posix it is considered an error, much like an uncaught exception. We don't actually *do* anything in that case, but we do log it send back an EOPNOTSUPP error. This makes the "unrecognized opcode" condition distinguishable from the "no IPC support" condition (which would yield an RPC error instead) so clients can probe for the presence of a handler for their own favorite opcode and either use that or use old-school xattrs depending on the result. BUG: 1158628 Signed-off-by: Venky Shankar <vshankar@redhat.com> Signed-off-by: Jeff Darcy <jdarcy@redhat.com> Change-Id: I84af1b17babe5b30ec03ecf027ae37d09b873968 Reviewed-on: http://review.gluster.org/8812 Reviewed-by: Vijay Bellur <vbellur@redhat.com>