/* Shutdown the filesystem; flags are as for fsys_goaway. */
error_t
netfs_shutdown (int flags)
{
error_t
helper (struct node *node)
{
error_t err;
mach_port_t control;
err = fshelp_fetch_control (&node->transbox, &control);
if (!err && (control != MACH_PORT_NULL))
{
mutex_unlock (&node->lock);
err = fsys_goaway (control, flags);
mach_port_deallocate (mach_task_self (), control);
mutex_lock (&node->lock);
}
else
err = 0;
if ((err == MIG_SERVER_DIED) || (err == MACH_SEND_INVALID_DEST))
err = 0;
return err;
}
/* Implement dir_unlink as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_dir_unlink (struct protid *dircred,
char *name)
{
struct node *dnp;
struct node *np;
struct dirstat *ds = alloca (diskfs_dirstat_size);
error_t err;
mach_port_t control = MACH_PORT_NULL;
if (!dircred)
return EOPNOTSUPP;
dnp = dircred->po->np;
if (diskfs_check_readonly ())
return EROFS;
pthread_mutex_lock (&dnp->lock);
err = diskfs_lookup (dnp, name, REMOVE, &np, ds, dircred);
if (err == EAGAIN)
err = EPERM; /* 1003.1-1996 5.5.1.4 */
if (err)
{
diskfs_drop_dirstat (dnp, ds);
pthread_mutex_unlock (&dnp->lock);
return err;
}
/* This isn't the BSD behavior, but it is Posix compliant and saves
us on several race conditions.*/
if (S_ISDIR(np->dn_stat.st_mode))
{
if (np == dnp) /* gotta catch '.' */
diskfs_nrele (np);
else
diskfs_nput (np);
diskfs_drop_dirstat (dnp, ds);
pthread_mutex_unlock (&dnp->lock);
return EPERM; /* 1003.1-1996 5.5.1.4 */
}
err = diskfs_dirremove (dnp, np, name, ds);
if (diskfs_synchronous)
diskfs_node_update (dnp, 1);
if (err)
{
diskfs_nput (np);
pthread_mutex_unlock (&dnp->lock);
return err;
}
np->dn_stat.st_nlink--;
np->dn_set_ctime = 1;
if (diskfs_synchronous)
diskfs_node_update (np, 1);
if (np->dn_stat.st_nlink == 0)
fshelp_fetch_control (&np->transbox, &control);
/* This check is necessary because we might get here on an error while
checking the mode on something which happens to be `.'. */
if (np == dnp)
diskfs_nrele (np);
else
diskfs_nput (np);
pthread_mutex_unlock (&dnp->lock);
if (control)
{
fsys_goaway (control, FSYS_GOAWAY_UNLINK);
mach_port_deallocate (mach_task_self (), control);
}
return err;
}
/* Mount one filesystem. */
static error_t
do_mount (struct fs *fs, int remount)
{
error_t err;
char *fsopts, *o;
size_t fsopts_len;
char *mntopts;
size_t mntopts_len;
fsys_t mounted;
inline void explain (const char *command)
{
if (verbose)
{
const char *o;
printf ("%s %s", command, fs->mntent.mnt_dir);
for (o = fsopts; o; o = argz_next (fsopts, fsopts_len, o))
printf (" %s", o);
putchar ('\n');
}
}
err = fs_fsys (fs, &mounted);
if (err)
{
error (0, err, "cannot determine if %s is already mounted",
fs->mntent.mnt_fsname);
return err;
}
/* Produce an argz of translator option arguments from the
given FS's options and the command-line options. */
#define ARGZ(call) \
err = argz_##call; \
if (err) \
error (3, ENOMEM, "collecting mount options"); \
if (fs->mntent.mnt_opts)
{
/* Append the fstab options to any specified on the command line. */
ARGZ (create_sep (fs->mntent.mnt_opts, ',', &mntopts, &mntopts_len));
/* Remove the `noauto' and `bind' options, since they're for us not the
filesystem. */
for (o = mntopts; o; o = argz_next (mntopts, mntopts_len, o))
{
if (strcmp (o, MNTOPT_NOAUTO) == 0)
argz_delete (&mntopts, &mntopts_len, o);
if (strcmp (o, "bind") == 0)
{
fs->mntent.mnt_type = strdup ("firmlink");
if (!fs->mntent.mnt_type)
error (3, ENOMEM, "failed to allocate memory");
argz_delete (&mntopts, &mntopts_len, o);
}
}
ARGZ (append (&mntopts, &mntopts_len, options, options_len));
}
else
{
mntopts = options;
mntopts_len = options_len;
}
/* Convert the list of options into a list of switch arguments. */
fsopts = 0;
fsopts_len = 0;
for (o = mntopts; o; o = argz_next (mntopts, mntopts_len, o))
if (*o == '-') /* Allow letter opts `-o -r,-E', BSD style. */
{
ARGZ (add (&fsopts, &fsopts_len, o));
}
else if ((strcmp (o, "defaults") != 0) && (strlen (o) != 0))
{
/* Prepend `--' to the option to make a long option switch,
e.g. `--ro' or `--rsize=1024'. */
char arg[2 + strlen (o) + 1];
arg[0] = arg[1] = '-';
memcpy (&arg[2], o, sizeof arg - 2);
ARGZ (add (&fsopts, &fsopts_len, arg));
}
if (mntopts != options)
free (mntopts);
#undef ARGZ
if (remount)
{
if (mounted == MACH_PORT_NULL)
{
error (0, 0, "%s not already mounted", fs->mntent.mnt_fsname);
return EBUSY;
}
/* Send an RPC to request the new options, including --update. */
explain ("fsysopts");
err = fsys_set_options (mounted, fsopts, fsopts_len, 0);
if (err)
error (0, err, "cannot remount %s", fs->mntent.mnt_fsname);
return err;
}
else
{
/* Error during file lookup; we use this to avoid duplicating error
messages. */
error_t open_err = 0;
/* The control port for any active translator we start up. */
fsys_t active_control;
file_t node; /* Port to the underlying node. */
struct fstype *type;
/* The callback to start_translator opens NODE as a side effect. */
error_t open_node (int flags,
mach_port_t *underlying,
mach_msg_type_name_t *underlying_type,
task_t task, void *cookie)
{
node = file_name_lookup (fs->mntent.mnt_dir,
flags | O_NOTRANS, 0666);
if (node == MACH_PORT_NULL)
{
open_err = errno;
return open_err;
}
*underlying = node;
*underlying_type = MACH_MSG_TYPE_COPY_SEND;
return 0;
}
/* Do not fail if there is an active translator if --fake is
given. This mimics Linux mount utility more closely which
just looks into the mtab file. */
if (mounted != MACH_PORT_NULL && !fake)
{
error (0, 0, "%s already mounted", fs->mntent.mnt_fsname);
return EBUSY;
}
if (strcmp (fs->mntent.mnt_type, "auto") == 0)
{
#if HAVE_BLKID
char *type =
blkid_get_tag_value (NULL, "TYPE", fs->mntent.mnt_fsname);
if (! type)
{
error (0, 0, "failed to detect file system type");
return EFTYPE;
}
else
{
if (strcmp (type, "vfat") == 0)
fs->mntent.mnt_type = strdup ("fat");
else
fs->mntent.mnt_type = strdup (type);
if (! fs->mntent.mnt_type)
error (3, ENOMEM, "failed to allocate memory");
}
#else
fs->mntent.mnt_type = strdup ("ext2");
if (! fs->mntent.mnt_type)
error (3, ENOMEM, "failed to allocate memory");
#endif
}
err = fs_type (fs, &type);
if (err)
{
error (0, err, "%s: cannot determine filesystem type",
fs->mntent.mnt_fsname);
return err;
}
if (type->program == 0)
{
error (0, 0, "%s: filesystem type `%s' unknown",
fs->mntent.mnt_fsname, type->name);
return EFTYPE;
}
/* Stick the translator program name in front of the option switches. */
err = argz_insert (&fsopts, &fsopts_len, fsopts, type->program);
/* Now stick the device name on the end as the last argument. */
if (!err)
err = argz_add (&fsopts, &fsopts_len, fs->mntent.mnt_fsname);
if (err)
error (3, ENOMEM, "collecting mount options");
/* Now we have a translator command line argz in FSOPTS. */
if (fake) {
/* Fake the translator startup. */
mach_port_t underlying;
mach_msg_type_name_t underlying_type;
err = open_node (O_READ, &underlying, &underlying_type, 0, NULL);
if (err)
error (1, errno, "cannot mount on %s", fs->mntent.mnt_dir);
mach_port_deallocate (mach_task_self (), underlying);
/* See if the translator is at least executable. */
if (access(type->program, X_OK) == -1)
error (1, errno, "can not execute %s", type->program);
return 0;
}
explain ("settrans -a");
err = fshelp_start_translator (open_node, NULL, fsopts,
fsopts, fsopts_len, timeout,
&active_control);
/* If ERR is due to a problem opening the translated node, we print
that name, otherwise, the name of the translator. */
if (open_err)
error (0, open_err, "cannot mount on %s", fs->mntent.mnt_dir);
else if (err)
error (0, err, "cannot start translator %s", fsopts);
else
{
err = file_set_translator (node, 0, FS_TRANS_SET|FS_TRANS_EXCL, 0,
0, 0,
active_control, MACH_MSG_TYPE_COPY_SEND);
if (err == EBUSY)
error (0, 0, "%s already mounted on", fs->mntent.mnt_dir);
else if (err)
error (0, err, "cannot set translator on %s", fs->mntent.mnt_dir);
if (err)
fsys_goaway (active_control, FSYS_GOAWAY_FORCE);
mach_port_deallocate (mach_task_self (), active_control);
}
return err;
}