porting: Port for FreeBSD rebased from Mike Ma's efforts

- Provides a working Gluster Management Daemon, CLI
- Provides a working GlusterFS server, GlusterNFS server
- Provides a working GlusterFS client
- execinfo port from FreeBSD is moved into ./contrib/libexecinfo
  for ease of portability on NetBSD. (FreeBSD 10 and OSX provide
  execinfo natively)
- More portability cleanups for Darwin, FreeBSD and NetBSD
- Provides a new rc script for FreeBSD

Change-Id: I8dff336f97479ca5a7f9b8c6b730051c0f8ac46f
BUG: 1111774
Original-Author: Mike Ma <mikemandarine@gmail.com>
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/8141
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

1 files changed, 80 insertions, 7 deletions

diff --git a/contrib/fuse-lib/mount.c b/contrib/fuse-lib/mount.c
index 922d9e464db..a7fd94de464 100644
--- a/contrib/fuse-lib/mount.c
+++ b/contrib/fuse-lib/mount.c
@@ -17,6 +17,11 @@
 #endif
 #define FUSE_DEVFD_ENV "_FUSE_DEVFD"
 
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#endif /* __FreeBSD__ */
 
 /* FUSE: function is called fuse_kern_unmount() */
 void
@@ -170,6 +175,55 @@ fuse_mount_fusermount (const char *mountpoint, char *fsname,
         return ret;
 }
 
+#if defined(__FreeBSD__)
+void
+build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val,
+            size_t len)
+{
+        int i;
+        if (*iovlen < 0)
+                return;
+        i = *iovlen;
+
+        *iov = realloc(*iov, sizeof **iov * (i + 2));
+        if (*iov == NULL) {
+                *iovlen = -1;
+                return;
+        }
+
+        (*iov)[i].iov_base = strdup(name);
+        (*iov)[i].iov_len = strlen(name) + 1;
+
+        i++;
+        (*iov)[i].iov_base = val;
+        if (len == (size_t) -1) {
+                if (val != NULL)
+                        len = strlen(val) + 1;
+                else
+                        len = 0;
+        }
+        (*iov)[i].iov_len = (int)len;
+        *iovlen = ++i;
+}
+
+/*
+ * This function is needed for compatibility with parameters
+ * which used to use the mount_argf() command for the old mount() syscall.
+ */
+void
+build_iovec_argf(struct iovec **iov, int *iovlen, const char *name,
+                 const char *fmt, ...)
+{
+        va_list ap;
+        char val[255] = { 0 };
+
+        va_start(ap, fmt);
+        vsnprintf(val, sizeof(val), fmt, ap);
+        va_end(ap);
+        build_iovec(iov, iovlen, name, strdup(val), (size_t)-1);
+}
+#endif /* __FreeBSD__ */
+
 static int
 fuse_mount_sys (const char *mountpoint, char *fsname,
                 unsigned long mountflags, char *mnt_param, int fd)
@@ -188,8 +242,24 @@ fuse_mount_sys (const char *mountpoint, char *fsname,
 
                 goto out;
         }
+
+#ifdef __FreeBSD__
+        struct iovec *iov = NULL;
+        int iovlen = 0;
+        build_iovec (&iov, &iovlen, "fstype", "fusefs", -1);
+        build_iovec (&iov, &iovlen, "subtype", "glusterfs", -1);
+        build_iovec (&iov, &iovlen, "fspath", mountpoint, -1);
+        build_iovec (&iov, &iovlen, "from", "/dev/fuse", -1);
+        build_iovec (&iov, &iovlen, "volname", source, -1);
+        build_iovec_argf (&iov, &iovlen, "fd", "%d", fd);
+        build_iovec_argf (&iov, &iovlen, "user_id", "%d", getuid());
+        build_iovec_argf (&iov, &iovlen, "group_id", "%d", getgid());
+        ret = nmount (iov, iovlen, mountflags);
+#else
         ret = mount (source, mountpoint, fstype, mountflags,
                      mnt_param_mnt);
+#endif /* __FreeBSD__ */
+#ifdef GF_LINUX_HOST_OS
         if (ret == -1 && errno == ENODEV) {
                 /* fs subtype support was added by 79c0b2df aka
                    v2.6.21-3159-g79c0b2d. Probably we have an
@@ -204,12 +274,13 @@ fuse_mount_sys (const char *mountpoint, char *fsname,
                 ret = mount (source, mountpoint, fstype, mountflags,
                              mnt_param_mnt);
         }
+#endif /* GF_LINUX_HOST_OS */
         if (ret == -1)
                 goto out;
         else
                 mounted = 1;
 
-#ifndef __NetBSD__
+#ifdef GF_LINUX_HOST_OS
         if (geteuid () == 0) {
                 char *newmnt = fuse_mnt_resolve_path ("fuse", mountpoint);
                 char *mnt_param_mtab = NULL;
@@ -238,10 +309,11 @@ fuse_mount_sys (const char *mountpoint, char *fsname,
                         goto out;
                 }
         }
-#endif /* __NetBSD__ */
+#endif /* GF_LINUX_HOST_OS */
 
 out:
         if (ret == -1) {
+                GFFUSE_LOGERR("ret = -1\n");
                 if (mounted)
                         umount2 (mountpoint, 2); /* lazy umount */
         }
@@ -282,15 +354,16 @@ gf_fuse_mount (const char *mountpoint, char *fsname,
                                 exit (pid == -1 ? 1 : 0);
                 }
 
-                ret = fuse_mount_sys (mountpoint, fsname, mountflags, mnt_param, fd);
+                ret = fuse_mount_sys (mountpoint, fsname, mountflags, mnt_param,
+                                      fd);
                 if (ret == -1) {
                         gf_log ("glusterfs-fuse", GF_LOG_INFO,
-                                "direct mount failed (%s), "
+                                "direct mount failed (%s) errno %d, "
                                 "retry to mount via fusermount",
-                                strerror (errno));
+                                strerror (errno), errno);
 
-                        ret = fuse_mount_fusermount (mountpoint, fsname, mountflags,
-                                                     mnt_param, fd);
+                        ret = fuse_mount_fusermount (mountpoint, fsname,
+                                                     mountflags, mnt_param, fd);
                 }
 
                 if (ret == -1)