From: Guenther Deschner <gd@samba.org>
Date: Thu, 5 Sep 2024 08:10:27 +0000 (+0530)
Subject: vfs_ceph_new: Populate function pointers with addresses
X-Git-Tag: samba-4.20.8~34
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a91d70044b78980b66ccd21072179a137e1f38d;p=thirdparty%2Fsamba.git

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 046b22f06b3..0b3203ee9d7 100644
--- 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;