return safe_atoi(p, mnt_id);
}
-
int fd_is_mount_point(int fd, const char *filename, int flags) {
union file_handle_union h = FILE_HANDLE_INIT, h_parent = FILE_HANDLE_INIT;
int mount_id = -1, mount_id_parent = -1;
fallback_fdinfo:
r = fd_fdinfo_mnt_id(fd, filename, flags, &mount_id);
- if (r == -EOPNOTSUPP)
+ if (IN_SET(r, -EOPNOTSUPP, -EACCES))
goto fallback_fstat;
if (r < 0)
return r;
continue;
if (umount2(p, flags) < 0) {
- r = -errno;
+ r = log_debug_errno(errno, "Failed to umount %s: %m", p);
continue;
}
+ log_debug("Successfully unmounted %s", p);
+
again = true;
n++;
return 0;
}
-int bind_remount_recursive(const char *prefix, bool ro) {
+int bind_remount_recursive(const char *prefix, bool ro, char **blacklist) {
_cleanup_set_free_free_ Set *done = NULL;
_cleanup_free_ char *cleaned = NULL;
int r;
- /* Recursively remount a directory (and all its submounts)
- * read-only or read-write. If the directory is already
- * mounted, we reuse the mount and simply mark it
- * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write
- * operation). If it isn't we first make it one. Afterwards we
- * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all
- * submounts we can access, too. When mounts are stacked on
- * the same mount point we only care for each individual
- * "top-level" mount on each point, as we cannot
- * influence/access the underlying mounts anyway. We do not
- * have any effect on future submounts that might get
- * propagated, they migt be writable. This includes future
- * submounts that have been triggered via autofs. */
+ /* Recursively remount a directory (and all its submounts) read-only or read-write. If the directory is already
+ * mounted, we reuse the mount and simply mark it MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write
+ * operation). If it isn't we first make it one. Afterwards we apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to
+ * all submounts we can access, too. When mounts are stacked on the same mount point we only care for each
+ * individual "top-level" mount on each point, as we cannot influence/access the underlying mounts anyway. We
+ * do not have any effect on future submounts that might get propagated, they migt be writable. This includes
+ * future submounts that have been triggered via autofs.
+ *
+ * If the "blacklist" parameter is specified it may contain a list of subtrees to exclude from the
+ * remount operation. Note that we'll ignore the blacklist for the top-level path. */
cleaned = strdup(prefix);
if (!cleaned)
if (r < 0)
return r;
+ if (!path_startswith(p, cleaned))
+ continue;
+
+ /* Ignore this mount if it is blacklisted, but only if it isn't the top-level mount we shall
+ * operate on. */
+ if (!path_equal(cleaned, p)) {
+ bool blacklisted = false;
+ char **i;
+
+ STRV_FOREACH(i, blacklist) {
+
+ if (path_equal(*i, cleaned))
+ continue;
+
+ if (!path_startswith(*i, cleaned))
+ continue;
+
+ if (path_startswith(p, *i)) {
+ blacklisted = true;
+ log_debug("Not remounting %s, because blacklisted by %s, called for %s", p, *i, cleaned);
+ break;
+ }
+ }
+ if (blacklisted)
+ continue;
+ }
+
/* Let's ignore autofs mounts. If they aren't
* triggered yet, we want to avoid triggering
* them, as we don't make any guarantees for
continue;
}
- if (path_startswith(p, cleaned) &&
- !set_contains(done, p)) {
-
+ if (!set_contains(done, p)) {
r = set_consume(todo, p);
p = NULL;
-
if (r == -EEXIST)
continue;
if (r < 0)
if (!set_contains(done, cleaned) &&
!set_contains(todo, cleaned)) {
- /* The prefix directory itself is not yet a
- * mount, make it one. */
+ /* The prefix directory itself is not yet a mount, make it one. */
if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0)
return -errno;
if (mount(NULL, prefix, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
return -errno;
+ log_debug("Made top-level directory %s a mount point.", prefix);
+
x = strdup(cleaned);
if (!x)
return -ENOMEM;
if (r < 0)
return r;
- /* Try to reuse the original flag set, but
- * don't care for errors, in case of
- * obstructed mounts */
+ /* Deal with mount points that are obstructed by a later mount */
+ r = path_is_mount_point(x, 0);
+ if (r == -ENOENT || r == 0)
+ continue;
+ if (r < 0)
+ return r;
+
+ /* Try to reuse the original flag set */
orig_flags = 0;
(void) get_mount_flags(x, &orig_flags);
orig_flags &= ~MS_RDONLY;
- if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) {
-
- /* Deal with mount points that are
- * obstructed by a later mount */
-
- if (errno != ENOENT)
- return -errno;
- }
+ if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
+ return -errno;
+ log_debug("Remounted %s read-only.", x);
}
}
}
"gfs2\0"
"glusterfs\0"
"pvfs2\0" /* OrangeFS */
+ "ocfs2\0"
+ "lustre\0"
;
const char *x;
}
}
#endif // 0
+
+const char* mode_to_inaccessible_node(mode_t mode) {
+ /* This function maps a node type to the correspondent inaccessible node type.
+ * Character and block inaccessible devices may not be created (because major=0 and minor=0),
+ * in such case we map character and block devices to the inaccessible node type socket. */
+ switch(mode & S_IFMT) {
+ case S_IFREG:
+ return "/run/systemd/inaccessible/reg";
+ case S_IFDIR:
+ return "/run/systemd/inaccessible/dir";
+ case S_IFCHR:
+ if (access("/run/systemd/inaccessible/chr", F_OK) == 0)
+ return "/run/systemd/inaccessible/chr";
+ return "/run/systemd/inaccessible/sock";
+ case S_IFBLK:
+ if (access("/run/systemd/inaccessible/blk", F_OK) == 0)
+ return "/run/systemd/inaccessible/blk";
+ return "/run/systemd/inaccessible/sock";
+ case S_IFIFO:
+ return "/run/systemd/inaccessible/fifo";
+ case S_IFSOCK:
+ return "/run/systemd/inaccessible/sock";
+ }
+ return NULL;
+}
+
+#if 0 /// UNNEEDED by elogind
+#define FLAG(name) (flags & name ? STRINGIFY(name) "|" : "")
+static char* mount_flags_to_string(long unsigned flags) {
+ char *x;
+ _cleanup_free_ char *y = NULL;
+ long unsigned overflow;
+
+ overflow = flags & ~(MS_RDONLY |
+ MS_NOSUID |
+ MS_NODEV |
+ MS_NOEXEC |
+ MS_SYNCHRONOUS |
+ MS_REMOUNT |
+ MS_MANDLOCK |
+ MS_DIRSYNC |
+ MS_NOATIME |
+ MS_NODIRATIME |
+ MS_BIND |
+ MS_MOVE |
+ MS_REC |
+ MS_SILENT |
+ MS_POSIXACL |
+ MS_UNBINDABLE |
+ MS_PRIVATE |
+ MS_SLAVE |
+ MS_SHARED |
+ MS_RELATIME |
+ MS_KERNMOUNT |
+ MS_I_VERSION |
+ MS_STRICTATIME |
+ MS_LAZYTIME);
+
+ if (flags == 0 || overflow != 0)
+ if (asprintf(&y, "%lx", overflow) < 0)
+ return NULL;
+
+ x = strjoin(FLAG(MS_RDONLY),
+ FLAG(MS_NOSUID),
+ FLAG(MS_NODEV),
+ FLAG(MS_NOEXEC),
+ FLAG(MS_SYNCHRONOUS),
+ FLAG(MS_REMOUNT),
+ FLAG(MS_MANDLOCK),
+ FLAG(MS_DIRSYNC),
+ FLAG(MS_NOATIME),
+ FLAG(MS_NODIRATIME),
+ FLAG(MS_BIND),
+ FLAG(MS_MOVE),
+ FLAG(MS_REC),
+ FLAG(MS_SILENT),
+ FLAG(MS_POSIXACL),
+ FLAG(MS_UNBINDABLE),
+ FLAG(MS_PRIVATE),
+ FLAG(MS_SLAVE),
+ FLAG(MS_SHARED),
+ FLAG(MS_RELATIME),
+ FLAG(MS_KERNMOUNT),
+ FLAG(MS_I_VERSION),
+ FLAG(MS_STRICTATIME),
+ FLAG(MS_LAZYTIME),
+ y, NULL);
+ if (!x)
+ return NULL;
+ if (!y)
+ x[strlen(x) - 1] = '\0'; /* truncate the last | */
+ return x;
+}
+
+int mount_verbose(
+ int error_log_level,
+ const char *what,
+ const char *where,
+ const char *type,
+ unsigned long flags,
+ const char *options) {
+
+ _cleanup_free_ char *fl = NULL;
+
+ fl = mount_flags_to_string(flags);
+
+ if ((flags & MS_REMOUNT) && !what && !type)
+ log_debug("Remounting %s (%s \"%s\")...",
+ where, strnull(fl), strempty(options));
+ else if (!what && !type)
+ log_debug("Mounting %s (%s \"%s\")...",
+ where, strnull(fl), strempty(options));
+ else if ((flags & MS_BIND) && !type)
+ log_debug("Bind-mounting %s on %s (%s \"%s\")...",
+ what, where, strnull(fl), strempty(options));
+ else
+ log_debug("Mounting %s on %s (%s \"%s\")...",
+ strna(type), where, strnull(fl), strempty(options));
+ if (mount(what, where, type, flags, options) < 0)
+ return log_full_errno(error_log_level, errno,
+ "Failed to mount %s on %s (%s \"%s\"): %m",
+ strna(type), where, strnull(fl), strempty(options));
+ return 0;
+}
+
+int umount_verbose(const char *what) {
+ log_debug("Umounting %s...", what);
+ if (umount(what) < 0)
+ return log_error_errno(errno, "Failed to unmount %s: %m", what);
+ return 0;
+}
+#endif // 0
~ianmdlvl / elogind.git / blobdiff