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-rw-r--r--amd/ops_tmpfs.c152
1 files changed, 145 insertions, 7 deletions
diff --git a/amd/ops_tmpfs.c b/amd/ops_tmpfs.c
index eddd75569e9e..d9a15ea0434d 100644
--- a/amd/ops_tmpfs.c
+++ b/amd/ops_tmpfs.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1997-2006 Erez Zadok
+ * Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
@@ -16,11 +16,7 @@
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgment:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
+ * 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
@@ -51,4 +47,146 @@
#include <am_defs.h>
#include <amd.h>
-/* FEEL FREE TO IMPLEMENT THIS... :-) */
+/* forward declarations */
+static char *tmpfs_match(am_opts *fo);
+static int tmpfs_mount(am_node *am, mntfs *mf);
+static int tmpfs_umount(am_node *am, mntfs *mf);
+
+/*
+ * Ops structure
+ */
+am_ops tmpfs_ops =
+{
+ "tmpfs",
+ tmpfs_match,
+ 0, /* tmpfs_init */
+ tmpfs_mount,
+ tmpfs_umount,
+ amfs_error_lookup_child,
+ amfs_error_mount_child,
+ amfs_error_readdir,
+ 0, /* tmpfs_readlink */
+ 0, /* tmpfs_mounted */
+ 0, /* tmpfs_umounted */
+ amfs_generic_find_srvr,
+ 0, /* tmpfs_get_wchan */
+ FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
+#if defined(HAVE_FS_AUTOFS) && defined(AUTOFS_TMPFS_FS_FLAGS)
+ AUTOFS_TMPFS_FS_FLAGS,
+#endif /* HAVE_FS_AUTOFS */
+};
+
+
+/*
+ * EFS needs local filesystem and device.
+ */
+static char *
+tmpfs_match(am_opts *fo)
+{
+
+ if (!fo->opt_dev) {
+ plog(XLOG_USER, "tmpfs: no device specified");
+ return 0;
+ }
+
+ dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
+
+ /*
+ * Determine magic cookie to put in mtab
+ */
+ return xstrdup(fo->opt_dev);
+}
+
+
+static int
+mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
+{
+ tmpfs_args_t tmpfs_args;
+ mntent_t mnt;
+ int flags;
+ const char *p;
+
+ /*
+ * Figure out the name of the file system type.
+ */
+ MTYPE_TYPE type = MOUNT_TYPE_TMPFS;
+
+ p = NULL;
+ memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */
+
+ /*
+ * Fill in the mount structure
+ */
+ memset((voidp) &mnt, 0, sizeof(mnt));
+ mnt.mnt_dir = mntdir;
+ mnt.mnt_fsname = fs_name;
+ mnt.mnt_type = MNTTAB_TYPE_TMPFS;
+ mnt.mnt_opts = opts;
+
+ flags = compute_mount_flags(&mnt);
+#ifdef HAVE_FS_AUTOFS
+ if (on_autofs)
+ flags |= autofs_compute_mount_flags(&mnt);
+#endif /* HAVE_FS_AUTOFS */
+
+#if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION)
+ tmpfs_args.ta_version = TMPFS_ARGS_VERSION;
+#endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */
+#ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX
+ if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL)
+ p = "1000000";
+ tmpfs_args.ta_nodes_max = atoi(p);
+#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
+#ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX
+ if ((p = amu_hasmntopt(&mnt, "size")) == NULL)
+ p = "10000000";
+ tmpfs_args.ta_size_max = atoi(p);
+#endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */
+#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID
+ if ((p = amu_hasmntopt(&mnt, "uid")) == NULL)
+ p = "0";
+ tmpfs_args.ta_root_uid = atoi(p);
+#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */
+#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID
+ if ((p = amu_hasmntopt(&mnt, "gid")) == NULL)
+ p = "0";
+ tmpfs_args.ta_root_gid = atoi(p);
+#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */
+#ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE
+ if ((p = amu_hasmntopt(&mnt, "mode")) == NULL)
+ p = "01777";
+ tmpfs_args.ta_root_mode = strtol(p, NULL, 8);
+#endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */
+
+ /*
+ * Call generic mount routine
+ */
+ return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
+}
+
+
+static int
+tmpfs_mount(am_node *am, mntfs *mf)
+{
+ int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
+ int error;
+
+ error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
+ if (error) {
+ errno = error;
+ plog(XLOG_ERROR, "mount_tmpfs: %m");
+ return error;
+ }
+
+ return 0;
+}
+
+
+static int
+tmpfs_umount(am_node *am, mntfs *mf)
+{
+ int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
+
+ return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
+}
+