selftests/mount_setattr/mount_setattr_test.c

10 #include <sys/mount.h>
21 #include <linux/mount.h>
251 	if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0))  in prepare_unpriv_mountns()
411 	ASSERT_EQ(mount("testing", "/tmp", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
416 	ASSERT_EQ(mount("testing", "/tmp/B", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
425 	ASSERT_EQ(mount("testing", "/tmp/B/BB", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
428 	ASSERT_EQ(mount("testing", "/mnt", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
433 	ASSERT_EQ(mount("testing", "/mnt/A", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
438 	ASSERT_EQ(mount("/tmp", "/mnt/A/AA", NULL, MS_BIND | MS_REC, NULL), 0);  in FIXTURE_SETUP()
442 	ASSERT_EQ(mount("testing", "/mnt/B", "ramfs",  in FIXTURE_SETUP()
447 	ASSERT_EQ(mount("testing", "/tmp/B/BB", "devpts",  in FIXTURE_SETUP()
662 	 * in the middle and the mount options need to be unchanged.  in TEST_F()
710 	 * We're holding a fd open to a mount somwhere in the middle so this  in TEST_F()
711 	 * needs to fail somewhere in the middle. After this the mount options  in TEST_F()
941 	/* Try to change mount options from multiple threads. */  in TEST_F()
1031 	ASSERT_EQ(mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0), 0);  in FIXTURE_SETUP()
1036 	ASSERT_EQ(mount("testing", "/tmp", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
1043 	ASSERT_EQ(mount("testing", "/tmp/B", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
1050 	ASSERT_EQ(mount("testing", "/tmp/B/BB", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
1053 	ASSERT_EQ(mount("testing", "/mnt", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
1058 	ASSERT_EQ(mount("testing", "/mnt/A", "tmpfs", MS_NOATIME | MS_NODEV,  in FIXTURE_SETUP()
1063 	ASSERT_EQ(mount("/tmp", "/mnt/A/AA", NULL, MS_BIND | MS_REC, NULL), 0);  in FIXTURE_SETUP()
1067 	ASSERT_EQ(mount("testing", "/mnt/B", "ramfs",  in FIXTURE_SETUP()
1072 	ASSERT_EQ(mount("testing", "/tmp/B/BB", "devpts",  in FIXTURE_SETUP()
1081 	ASSERT_EQ(system("mount -o loop -t ext4 /mnt/C/ext4.img /mnt/D/"), 0);  in FIXTURE_SETUP()
1105 		TH_LOG("failure: created idmapped mount with negative fd");  in TEST_F()
1123 		TH_LOG("failure: created idmapped mount with too large fd value");  in TEST_F()
1146 		TH_LOG("failure: created idmapped mount with closed fd");  in TEST_F()
1258  * Validate that an attached mount in our mount namespace cannot be idmapped.
1259  * (The kernel enforces that the mount's mount namespace and the caller's mount
1287  * Validate that idmapping a mount is rejected if the mount's mount namespace
1288  * and our mount namespace don't match.
1289  * (The kernel enforces that the mount's mount namespace and the caller's mount
1320  * Validate that an attached mount in our mount namespace can be idmapped.
1340 	/* Changing mount properties on a detached mount. */  in TEST_F()
1350  * Validate that a detached mount not in our mount namespace can be idmapped.
1372 	/* Changing mount properties on a detached mount. */  in TEST_F()
1382  * Validate that currently changing the idmapping of an idmapped mount fails.
1408 	/* Change idmapping on a detached mount that is already idmapped. */  in TEST_F()
1442 	ASSERT_EQ(mount("testing", "/mnt/A", "ramfs", MS_NOATIME | MS_NODEV,  in TEST_F()
1447 	ASSERT_EQ(mount("/tmp", "/mnt/A/AA", NULL, MS_BIND | MS_REC, NULL), 0);  in TEST_F()
1645 	 * The origin mount namespace of the anonymous mount namespace  in TEST_F()
1646 	 * of @fd_tree_base doesn't match the caller's mount namespace  in TEST_F()
1689 	 * located in a mount namespace that is owned by an ancestor  in TEST_F()
1691 	 * detached mount must thus fail.  in TEST_F()
1731         * The caller entered a new mount namespace. They will have  in TEST_F()
1732         * CAP_SYS_ADMIN in the owning user namespace of their mount  in TEST_F()
1735         * However, the origin mount namespace of the anonymous mount  in TEST_F()
1736         * namespace of @fd_tree_base doesn't match the caller's mount  in TEST_F()
1882 	/* Attach the mount to the caller's mount namespace. */  in TEST_F()
1895 	/* Not allowed to move an attached mount to a detached mount. */  in TEST_F()
1918 	/* Attach the mount to the caller's mount namespace. */  in TEST_F()
1927 	 * This tests whether dissolve_on_fput() handles a NULL mount  in TEST_F()
1959 	 * Move the source detached mount tree to the target detached  in TEST_F()
1960 	 * mount tree. This will move all the mounts in the source mount  in TEST_F()
1961 	 * tree from the source anonymous mount namespace to the target  in TEST_F()
1962 	 * anonymous mount namespace.  in TEST_F()
1964 	 * The source detached mount tree and the target detached mount  in TEST_F()
1965 	 * tree now both refer to the same anonymous mount namespace.  in TEST_F()
1976 	 * The source detached mount tree @fd_tree1 is now an attached  in TEST_F()
1977 	 * mount, i.e., it has a parent. Specifically, it now has the  in TEST_F()
1978 	 * root mount of the mount tree of @fd_tree2 as its parent.  in TEST_F()
1981 	 * allow attaching the root of an anonymous mount tree, not  in TEST_F()
1987 	 * Closing the source detached mount tree must not unmount and  in TEST_F()
1988 	 * free the shared anonymous mount namespace. The kernel will  in TEST_F()
1989 	 * quickly yell at us because the anonymous mount namespace  in TEST_F()
1995 	 * Attach the mount tree to a non-anonymous mount namespace.  in TEST_F()
1997 	 * semantics and didn't cause the anonymous mount namespace to  in TEST_F()
2016 	 * Copy the following mount tree:  in TEST_F()
2031 	 * that refers to the same detached mount tree as @fd_tree1  in TEST_F()
2039 	 * Copy the following mount tree:  in TEST_F()
2049 	 * This must fail as this would mean adding the same mount tree  in TEST_F()
2050 	 * into the same mount tree.  in TEST_F()
2060 	 * Copy the following mount tree:  in TEST_F()
2075 	 * refers to a subtree of the same detached mount tree as @fd_tree1  in TEST_F()
2084 	 * detached mount tree.  in TEST_F()
2097 	ASSERT_EQ(mount(NULL, "/mnt", NULL, MS_REC | MS_SHARED, NULL), 0);  in TEST_F()
2100 	 * Copy the following mount tree:  in TEST_F()
2119 	 * Copying the mount namespace like done above doesn't alter the  in TEST_F()
2127 	/* Mount a tmpfs filesystem over /mnt/A. */  in TEST_F()
2128 	ASSERT_EQ(mount(NULL, "/mnt/A", "tmpfs", 0, NULL), 0);  in TEST_F()
2137 	 * statx() that was taken from /mnt/A before the mount compared  in TEST_F()
2138 	 * to one after the mount.  in TEST_F()
2147 	 * If mount propagation worked correctly then the tmpfs mount  in TEST_F()
2148 	 * that was created after the mount namespace was unshared will  in TEST_F()
2149 	 * have propagated onto /mnt/A in the detached mount tree.  in TEST_F()
2153 	 * from both stx1 and stx2 sampled before the tmpfs mount was  in TEST_F()