*
*/
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
#include <ctype.h>
#include <unistd.h>
#include <stdio.h>
return 1;
}
+/*
+ * Distinguish between permanent and temporary errors.
+ *
+ * Returns 0 if the passed-in error is temporary, thus the
+ * mount system call should be retried; returns one if the
+ * passed-in error is permanent, thus the mount system call
+ * should not be retried.
+ */
+static int is_permanent_error(int error)
+{
+ switch (error) {
+ case ESTALE:
+ case ETIMEDOUT:
+ case ECONNREFUSED:
+ return 0; /* temporary */
+ default:
+ return 1; /* permanent */
+ }
+}
+
/*
* Reconstruct the mount option string based on a portmapper probe
* of the server. Returns one if the server's portmapper returned
if (option)
mnt_server.pmap.pm_port = atoi(option);
mnt_server.pmap.pm_prog = MOUNTPROG;
- option = po_get(options, "mountprog");
- if (option)
- mnt_server.pmap.pm_prog = atoi(option);
option = po_get(options, "mountvers");
if (option)
mnt_server.pmap.pm_vers = atoi(option);
po_remove_all(options, "port");
}
nfs_server.pmap.pm_prog = NFS_PROGRAM;
- option = po_get(options, "nfsprog");
- if (option)
- nfs_server.pmap.pm_prog = atoi(option);
option = po_get(options, "nfsvers");
if (option) {
options, fake, extra_opts);
}
+/*
+ * Handle "foreground" NFS mounts.
+ *
+ * Retry the mount request for as long as the 'retry=' option says.
+ *
+ * Returns a valid mount command exit code.
+ */
+static int nfsmount_fg(const char *spec, const char *node,
+ const char *type, int flags,
+ struct mount_options *options, int fake,
+ char **extra_opts)
+{
+ unsigned int secs = 1;
+ time_t timeout = time(NULL);
+ char *retry;
+
+ timeout += 60 * 2; /* default: 2 minutes */
+ retry = po_get(options, "retry");
+ if (retry)
+ timeout += 60 * atoi(retry);
+
+ if (verbose)
+ printf(_("%s: timeout set for %s"),
+ progname, ctime(&timeout));
+
+ for (;;) {
+ if (try_mount(spec, node, type, flags,
+ options, fake, extra_opts))
+ return EX_SUCCESS;
+
+ if (is_permanent_error(errno))
+ break;
+
+ if (time(NULL) > timeout) {
+ errno = ETIMEDOUT;
+ break;
+ }
+
+ if (errno != ETIMEDOUT) {
+ if (sleep(secs))
+ break;
+ secs <<= 1;
+ if (secs > 10)
+ secs = 10;
+ }
+ };
+
+ mount_error(spec, node, errno);
+ return EX_FAIL;
+}
+
+/*
+ * Handle "background" NFS mount [first try]
+ *
+ * Returns a valid mount command exit code.
+ *
+ * EX_BG should cause the caller to fork and invoke nfsmount_child.
+ */
+static int nfsmount_parent(const char *spec, const char *node,
+ const char *type, char *hostname, int flags,
+ struct mount_options *options,
+ int fake, char **extra_opts)
+{
+ if (try_mount(spec, node, type, flags, options,
+ fake, extra_opts))
+ return EX_SUCCESS;
+
+ if (is_permanent_error(errno)) {
+ mount_error(spec, node, errno);
+ return EX_FAIL;
+ }
+
+ sys_mount_errors(hostname, errno, 1, 1);
+ return EX_BG;
+}
+
+/*
+ * Handle "background" NFS mount [retry daemon]
+ *
+ * Returns a valid mount command exit code: EX_SUCCESS if successful,
+ * EX_FAIL if a failure occurred. There's nothing to catch the
+ * error return, though, so we use sys_mount_errors to log the
+ * failure.
+ */
+static int nfsmount_child(const char *spec, const char *node,
+ const char *type, char *hostname, int flags,
+ struct mount_options *options,
+ int fake, char **extra_opts)
+{
+ unsigned int secs = 1;
+ time_t timeout = time(NULL);
+ char *retry;
+
+ timeout += 60 * 10000; /* default: 10,000 minutes */
+ retry = po_get(options, "retry");
+ if (retry)
+ timeout += 60 * atoi(retry);
+
+ for (;;) {
+ if (sleep(secs))
+ break;
+ secs <<= 1;
+ if (secs > 120)
+ secs = 120;
+
+ if (try_mount(spec, node, type, flags, options,
+ fake, extra_opts))
+ return EX_SUCCESS;
+
+ if (is_permanent_error(errno))
+ break;
+
+ if (time(NULL) > timeout)
+ break;
+
+ sys_mount_errors(hostname, errno, 1, 1);
+ };
+
+ sys_mount_errors(hostname, errno, 1, 0);
+ return EX_FAIL;
+}
+
+/*
+ * Handle "background" NFS mount
+ *
+ * Returns a valid mount command exit code.
+ */
+static int nfsmount_bg(const char *spec, const char *node,
+ const char *type, char *hostname, int flags,
+ struct mount_options *options,
+ int fake, int child, char **extra_opts)
+{
+ if (!child)
+ return nfsmount_parent(spec, node, type, hostname, flags,
+ options, fake, extra_opts);
+ else
+ return nfsmount_child(spec, node, type, hostname, flags,
+ options, fake, extra_opts);
+}
+
/**
* nfsmount_string - Mount an NFS file system using C string options
* @spec: C string specifying remote share to mount ("hostname:path")
struct mount_options *options = NULL;
struct sockaddr_in saddr;
char *hostname;
- int err, retval = EX_FAIL;
+ int retval = EX_FAIL;
if (!parse_devname(spec, &hostname))
- goto out;
- err = fill_ipv4_sockaddr(hostname, &saddr);
- free(hostname);
- if (!err)
- goto out;
+ return retval;
+ if (!fill_ipv4_sockaddr(hostname, &saddr))
+ goto fail;
options = po_split(*extra_opts);
if (!options) {
nfs_error(_("%s: internal option parsing error"), progname);
- goto out;
+ goto fail;
}
if (!set_mandatory_options(type, &saddr, options))
goto out;
- if (try_mount(spec, node, type, flags, options, fake, extra_opts)) {
- mount_error(spec, node, errno);
- goto out;
- }
-
- retval = EX_SUCCESS;
+ if (po_rightmost(options, "bg", "fg") == PO_KEY1_RIGHTMOST)
+ retval = nfsmount_bg(spec, node, type, hostname, flags,
+ options, fake, child, extra_opts);
+ else
+ retval = nfsmount_fg(spec, node, type, flags, options,
+ fake, extra_opts);
out:
po_destroy(options);
+fail:
+ free(hostname);
return retval;
}