vfs_ceph_new: Populate function pointers with addresses

Use dlysm() for assigning addresses to already declared libcephfs
low-level API function pointers.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15703

Pair-Programmed-With: Anoop C S <anoopcs@samba.org>
Signed-off-by: Guenther Deschner <gd@samba.org>
Signed-off-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
(cherry picked from commit e4fc1df4b4486f5eed095135f905bdbf10bb1793)

diff --git a/source3/modules/vfs_ceph_new.c b/source3/modules/vfs_ceph_new.c
index 046b22f06b309ad311948db71643f80731e704f8..0b3203ee9d756f729599127dfd5fc64f178fcbb8 100644 (file)
--- a/source3/modules/vfs_ceph_new.c
+++ b/source3/modules/vfs_ceph_new.c
@@ -316,6 +316,18 @@ static struct ceph_mount_info *cephmount_mount_fs(
        return mnt;
 }
 
+#define CHECK_CEPH_FN(hnd, func) \
+       do { \
+               config->func ## _fn = dlsym(hnd, #func); \
+               if (config->func ## _fn == NULL) { \
+                       if (dlclose(hnd)) { \
+                               DBG_ERR("%s\n", dlerror()); \
+                       } \
+                       errno = ENOSYS; \
+                       return false; \
+               } \
+       } while(0);
+
 static bool vfs_cephfs_load_lib(struct vfs_ceph_config *config)
 {
        void *libhandle = NULL;
@@ -346,6 +358,54 @@ static bool vfs_cephfs_load_lib(struct vfs_ceph_config *config)
                break;
        }
 
+       CHECK_CEPH_FN(libhandle, ceph_ll_lookup_inode);
+       CHECK_CEPH_FN(libhandle, ceph_ll_walk);
+       CHECK_CEPH_FN(libhandle, ceph_ll_getattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_setattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_releasedir);
+       CHECK_CEPH_FN(libhandle, ceph_ll_create);
+       CHECK_CEPH_FN(libhandle, ceph_ll_open);
+       CHECK_CEPH_FN(libhandle, ceph_ll_opendir);
+       CHECK_CEPH_FN(libhandle, ceph_ll_mkdir);
+       CHECK_CEPH_FN(libhandle, ceph_ll_rmdir);
+       CHECK_CEPH_FN(libhandle, ceph_ll_unlink);
+       CHECK_CEPH_FN(libhandle, ceph_ll_symlink);
+       CHECK_CEPH_FN(libhandle, ceph_ll_readlink);
+       CHECK_CEPH_FN(libhandle, ceph_ll_put);
+       CHECK_CEPH_FN(libhandle, ceph_ll_read);
+       CHECK_CEPH_FN(libhandle, ceph_ll_write);
+       CHECK_CEPH_FN(libhandle, ceph_ll_lseek);
+       CHECK_CEPH_FN(libhandle, ceph_ll_fsync);
+       CHECK_CEPH_FN(libhandle, ceph_ll_fallocate);
+       CHECK_CEPH_FN(libhandle, ceph_ll_link);
+       CHECK_CEPH_FN(libhandle, ceph_ll_rename);
+       CHECK_CEPH_FN(libhandle, ceph_ll_mknod);
+       CHECK_CEPH_FN(libhandle, ceph_ll_getxattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_setxattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_listxattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_removexattr);
+       CHECK_CEPH_FN(libhandle, ceph_ll_lookup);
+       CHECK_CEPH_FN(libhandle, ceph_ll_lookup_root);
+       CHECK_CEPH_FN(libhandle, ceph_ll_statfs);
+       CHECK_CEPH_FN(libhandle, ceph_ll_close);
+
+       CHECK_CEPH_FN(libhandle, ceph_chdir);
+       CHECK_CEPH_FN(libhandle, ceph_conf_get);
+       CHECK_CEPH_FN(libhandle, ceph_conf_read_file);
+       CHECK_CEPH_FN(libhandle, ceph_conf_set);
+       CHECK_CEPH_FN(libhandle, ceph_create);
+       CHECK_CEPH_FN(libhandle, ceph_getcwd);
+       CHECK_CEPH_FN(libhandle, ceph_init);
+       CHECK_CEPH_FN(libhandle, ceph_mount);
+       CHECK_CEPH_FN(libhandle, ceph_release);
+       CHECK_CEPH_FN(libhandle, ceph_select_filesystem);
+       CHECK_CEPH_FN(libhandle, ceph_unmount);
+       CHECK_CEPH_FN(libhandle, ceph_userperm_destroy);
+       CHECK_CEPH_FN(libhandle, ceph_userperm_new);
+       CHECK_CEPH_FN(libhandle, ceph_version);
+       CHECK_CEPH_FN(libhandle, ceph_readdir);
+       CHECK_CEPH_FN(libhandle, ceph_rewinddir);
+
        config->libhandle = libhandle;
 
        return true;