search for: sem_init

Hello! Currently, when a program built without OpenMP (-fopenmp) is trying to dlopen a library, built with the feature, the result is a crash from "bad system call": #0 0x00000008009a223c in ksem_init () from /lib/libc.so.7 #1 0x0000000800998a8f in sem_init () from /lib/libc.so.7 #2 0x00000008011a6537 in omp_get_nested () from /usr/lib/libgomp.so.1 #3 0x00000008011a3466 in ?? () from /usr/lib/libgomp.so.1 #4 0x0000000000000002 in ?? () #5 0x00000008005072b2 in dlsym () f...

...fs2.a ../libo2dlm/libo2dlm.a ../libo2cb/libo2cb.a -L../libocfs2 -locfs2 -L../libo2dlm -lo2dlm -L../libo2cb -lo2cb -L/lib64 -lcom_err /lib64/libcom_err.a(error_message.o): In function `setup_et_lock': error_message.c:(.text+0x1a3): undefined reference to `sem_init' /lib64/libcom_err.a(error_message.o): In function `fini_et_lock': error_message.c:(.text+0x1cc): undefined reference to `sem_destroy' /lib64/libcom_err.a(error_message.o): In function `et_list_lock': error_message.c:(.text+0x1ff): undefined reference to `sem_wait' /lib64/libcom...

...../../../lib/et/error_message.c:74: undefined reference to `sem_destroy' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../lib/libcom_err.a(error_message.o): In function `setup_et_lock': /sources/e2fsprogs-1.41.9/build/lib/et/../../../lib/et/error_message.c:68: undefined reference to `sem_init' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../lib/libcom_err.a(error_message.o): In function `et_list_unlock': /sources/e2fsprogs-1.41.9/build/lib/et/../../../lib/et/error_message.c:95: undefined reference to `sem_post' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../...

...../../../lib/et/error_message.c:74: undefined reference to `sem_destroy' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../lib/libcom_err.a(error_message.o): In function `setup_et_lock': /sources/e2fsprogs-1.41.9/build/lib/et/../../../lib/et/error_message.c:68: undefined reference to `sem_init' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../lib/libcom_err.a(error_message.o): In function `et_list_unlock': /sources/e2fsprogs-1.41.9/build/lib/et/../../../lib/et/error_message.c:95: undefined reference to `sem_post' /usr/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../...

...libcom_err.a(error_message.o): In function `et_list_unlock': > (.text+0x1b6): undefined reference to `sem_post' > /usr/lib/gcc/x86_64-redhat-linux/4.6.2/../../../../lib64/libcom_err.a(error_message.o): In function `setup_et_lock': > (.text.startup+0x11): undefined reference to `sem_init' > /usr/lib/gcc/x86_64-redhat-linux/4.6.2/../../../../lib64/libcom_err.a(error_message.o): In function `fini_et_lock': > (.text.exit+0xa): undefined reference to `sem_destroy' > collect2: ld returned 1 exit status > > > It seems that sem_* symbols are in -pthread -...

...!= LIBNBD_TLS_DISABLE) { struct nbd_handle *nbd = nbd_create (); if (!nbd) { @@ -345,23 +347,12 @@ nbdplug_reader (void *handle) return NULL; } -/* Prepare for a transaction. */ -static void -nbdplug_prepare (struct transaction *trans) -{ - memset (trans, 0, sizeof *trans); - if (sem_init (&trans->sem, 0, 0)) - assert (false); -} - +/* Callback used at end of a transaction. */ static int -nbdplug_notify (unsigned valid_flag, void *opaque, int *error) +nbdplug_notify (void *opaque, int *error) { struct transaction *trans = opaque; - if (!(valid_flag & LIBNBD_CALL...

...undefined reference to `sem_post' /lib/libcom_err.a(error_message.o): In function `fini_et_lock': error_message.c:(.text+0x3e): undefined reference to `sem_destroy' /lib/libcom_err.a(error_message.o): In function `setup_et_lock': error_message.c:(.text+0x6e): undefined reference to `sem_init' /lib/libcom_err.a(error_message.o): In function `et_list_lock': error_message.c:(.text+0x9d): undefined reference to `sem_wait' collect2: ld returned 1 exit status Waf: Leaving directory `/tmp/samba-4.0.0alpha14/source4/bin' Build failed: -> task failed (err #1): {task: cc_lin...

I'm not observing any noticeable performance differences, but I'm liking the diffstat. I can't push this patch until we release a new libnbd version with the _notify API addition, but am posting it now for playing with things. Eric Blake (2): nbd: Move transaction info from heap to stack nbd: Use nbdkit aio_*_notify variants plugins/nbd/nbd.c | 217

...trans); if (!trans) { nbdkit_error ("unable to track transaction: %m"); /* Still in sync with server, so don't mark connection dead */ - return -1; + return NULL; } - if (pipe (trans->u.fds)) { - nbdkit_error ("unable to create pipe: %m"); + if (sem_init (&trans->sem, 0, 0)) { + nbdkit_error ("unable to create semaphore: %m"); /* Still in sync with server, so don't mark connection dead */ free (trans); - return -1; + return NULL; } trans->buf = rep_buf; trans->count = rep_buf ? count : 0; @@ -3...

...*extents) -{ - int err; - struct transaction *trans; - uint64_t cookie; - - trans = calloc (1, sizeof *trans); - if (!trans) { - nbdkit_error ("unable to track transaction: %m"); - /* Still in sync with server, so don't mark connection dead */ - return NULL; - } - if (sem_init (&trans->sem, 0, 0)) { - nbdkit_error ("unable to create semaphore: %m"); - /* Still in sync with server, so don't mark connection dead */ - free (trans); - return NULL; - } - trans->buf = rep_buf; - trans->count = rep_buf ? count : 0; - trans->offset =...

...*extents) -{ - int err; - struct transaction *trans; - uint64_t cookie; - - trans = calloc (1, sizeof *trans); - if (!trans) { - nbdkit_error ("unable to track transaction: %m"); - /* Still in sync with server, so don't mark connection dead */ - return NULL; - } - if (sem_init (&trans->sem, 0, 0)) { - nbdkit_error ("unable to create semaphore: %m"); - /* Still in sync with server, so don't mark connection dead */ - free (trans); - return NULL; - } - trans->buf = rep_buf; - trans->count = rep_buf ? count : 0; - trans->offset =...

Patch 1 played with an early draft of Rich's Fedora 30 libnbd package: https://bugzilla.redhat.com/show_bug.cgi?id=1713767#c17 Note that comment 21 provides a newer package 0.1.1-1 with a different API; and that libnbd has more unreleased API changes in the pipeline (whether that will be called 0.2 or 0.1.2); so we'll have to tweak things based on what is actually available in distros.

libnbd-0.1.2-1 is now available in Fedora 29/30 updates-testing, although it was not compiled against libxml2 so it lacks uri support (I ended up testing patch 4 with a self-built libnbd). Diffs since v1 - rebase to master, bump from libnbd 0.1 to 0.1.2, add URI support, better timing results Still not done - patch 5 needs associated tests Eric Blake (5): nbd: Check for libnbd nbd:

...*extents) -{ - int err; - struct transaction *trans; - uint64_t cookie; - - trans = calloc (1, sizeof *trans); - if (!trans) { - nbdkit_error ("unable to track transaction: %m"); - /* Still in sync with server, so don't mark connection dead */ - return NULL; - } - if (sem_init (&trans->sem, 0, 0)) { - nbdkit_error ("unable to create semaphore: %m"); - /* Still in sync with server, so don't mark connection dead */ - free (trans); - return NULL; - } - trans->buf = rep_buf; - trans->count = rep_buf ? count : 0; - trans->offset =...

libnbd-0.1.4-1 is now available in Fedora 29/30 updates testing. Diffs since v2 - rebase to master, bump from libnbd 0.1.2 to 0.1.3+, add tests to TLS usage which flushed out the need to turn relative pathnames into absolute, doc tweaks Now that the testsuite covers TLS and libnbd has been fixed to provide the things I found lacking when developing v2, I'm leaning towards pushing this on