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Line 77... Line 77...
77 
    /*
 77 
    /*
78 
     * For now, don't make use of ARG2 and ARG3, but they can be used to
 78 
     * For now, don't make use of ARG2 and ARG3, but they can be used to
79 
     * carry mount options in the future.
 79 
     * carry mount options in the future.
80 
     */
 80 
     */
81 
 
 81 
 
- 
 
 82 
    ipc_callid_t callid;
- 
 
 83 
    size_t size;
- 
 
 84 
 
82 
    /*
 85 
    /*
83 
     * Now, we expect the client to send us data with the name of the file
 86 
     * Now, we expect the client to send us data with the name of the file
84 
     * system and the path of the mountpoint.
 87 
     * system.
85 
     */
 88 
     */
86 
    ipc_callid_t callid;
 - 
 
87 
    size_t size;
 - 
 
88 
    if (!ipc_data_receive(&callid, NULL, &size)) {
 89 
    if (!ipc_data_receive(&callid, NULL, &size)) {
89 
        ipc_answer_0(callid, EINVAL);
 90 
        ipc_answer_0(callid, EINVAL);
90 
        ipc_answer_0(rid, EINVAL);
 91 
        ipc_answer_0(rid, EINVAL);
91 
        return;
 92 
        return;
92 
    }
 93 
    }
93 
 
 94 
 
94 
    /*
 95 
    /*
95 
     * There is no sense in receiving data that can't hold a single
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     * Don't receive more than is necessary for storing a full file system
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     * character of path. We won't accept data that exceed certain limits
 - 
 
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     * either.
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     * name.
98 
     */
 98 
     */
99 
    if ((size < FS_NAME_MAXLEN + 1) ||
 99 
    if (size < 1 || size > FS_NAME_MAXLEN) {
100 
        (size > FS_NAME_MAXLEN + MAX_PATH_LEN)) {
 - 
 
101 
        ipc_answer_0(callid, EINVAL);
 100 
        ipc_answer_0(callid, EINVAL);
102 
        ipc_answer_0(rid, EINVAL);
 101 
        ipc_answer_0(rid, EINVAL);
103 
        return;
 102 
        return;
104 
    }
 103 
    }
105 
 
 104 
 
106 
    /*
 105 
    /*
- 
 
 106 
     * Deliver the file system name.
- 
 
 107 
     */
- 
 
 108 
    char fs_name[FS_NAME_MAXLEN + 1];
- 
 
 109 
    (void) ipc_data_deliver(callid, fs_name, size);
- 
 
 110 
    fs_name[size] = '\0';
- 
 
 111 
   
- 
 
 112 
    /*
- 
 
 113 
     * Check if we know a file system with the same name as is in fs_name.
- 
 
 114 
     * This will also give us its file system handle.
- 
 
 115 
     */
- 
 
 116 
    int fs_handle = fs_name_to_handle(fs_name, true);
- 
 
 117 
    if (!fs_handle) {
- 
 
 118 
        ipc_answer_0(rid, ENOENT);
- 
 
 119 
        return;
- 
 
 120 
    }
- 
 
 121 
 
- 
 
 122 
    /*
- 
 
 123 
     * Now, we want the client to send us the mount point.
- 
 
 124 
     */
- 
 
 125 
    if (!ipc_data_receive(&callid, NULL, &size)) {
- 
 
 126 
        ipc_answer_0(callid, EINVAL);
- 
 
 127 
        ipc_answer_0(rid, EINVAL);
- 
 
 128 
        return;
- 
 
 129 
    }
- 
 
 130 
 
- 
 
 131 
    /*
- 
 
 132 
     * Check whether size is reasonable wrt. the mount point.
- 
 
 133 
     */
- 
 
 134 
    if (size < 1 || size > MAX_PATH_LEN) {
- 
 
 135 
        ipc_answer_0(callid, EINVAL);
- 
 
 136 
        ipc_answer_0(rid, EINVAL);
- 
 
 137 
        return;
- 
 
 138 
    }
- 
 
 139 
    /*
107 
     * Allocate buffer for the data being received.
 140 
     * Allocate buffer for the mount point data being received.
108 
     */
 141 
     */
109 
    uint8_t *buf;
 142 
    uint8_t *buf;
110 
    buf = malloc(size);
 143 
    buf = malloc(size);
111 
    if (!buf) {
 144 
    if (!buf) {
112 
        ipc_answer_0(callid, ENOMEM);
 145 
        ipc_answer_0(callid, ENOMEM);
113 
        ipc_answer_0(rid, ENOMEM);
 146 
        ipc_answer_0(rid, ENOMEM);
114 
        return;
 147 
        return;
115 
    }
 148 
    }
116 
 
 149 
 
117 
    /*
 150 
    /*
118 
     * Deliver the data.
 151 
     * Deliver the mount point.
119 
     */
 152 
     */
120 
    (void) ipc_data_deliver(callid, buf, size);
 153 
    (void) ipc_data_deliver(callid, buf, size);
121 
 
 154 
 
122 
    char fs_name[FS_NAME_MAXLEN + 1];
 - 
 
123 
    memcpy(fs_name, buf, FS_NAME_MAXLEN);
 - 
 
124 
    fs_name[FS_NAME_MAXLEN] = '\0';
 - 
 
125 
 
 - 
 
126 
    /*
 - 
 
127 
     * Check if we know a file system with the same name as is in fs_name.
 - 
 
128 
     * This will also give us its file system handle.
 - 
 
129 
     */
 - 
 
130 
    int fs_handle = fs_name_to_handle(fs_name, true);
 - 
 
131 
    if (!fs_handle) {
 - 
 
132 
        free(buf);
 - 
 
133 
        ipc_answer_0(rid, ENOENT);
 - 
 
134 
        return;
 - 
 
135 
    }
 - 
 
136 
 
 - 
 
137 
    /*
 155 
    /*
138 
     * Lookup the root node of the filesystem being mounted.
 156 
     * Lookup the root node of the filesystem being mounted.
139 
     * In this case, we don't need to take the unlink_futex as the root node
 157 
     * In this case, we don't need to take the unlink_futex as the root node
140 
     * cannot be removed. However, we do take a reference to it so that
 158 
     * cannot be removed. However, we do take a reference to it so that
141 
     * we can track how many times it has been mounted.
 159 
     * we can track how many times it has been mounted.
Line 163... Line 181...
163 
    if (rootfs.fs_handle) {
 181 
    if (rootfs.fs_handle) {
164 
        /*
 182 
        /*
165 
         * We already have the root FS.
 183 
         * We already have the root FS.
166 
         */
 184 
         */
167 
        futex_down(&unlink_futex);
 185 
        futex_down(&unlink_futex);
168 
        rc = vfs_lookup_internal((char *) (buf + FS_NAME_MAXLEN),
 186 
        rc = vfs_lookup_internal(buf, size, &mp, NULL);
169 
            size - FS_NAME_MAXLEN, &mp, NULL);
 - 
 
170 
        if (rc != EOK) {
 187 
        if (rc != EOK) {
171 
            /*
 188 
            /*
172 
             * The lookup failed for some reason.
 189 
             * The lookup failed for some reason.
173 
             */
 190 
             */
174 
            futex_up(&unlink_futex);
 191 
            futex_up(&unlink_futex);
Line 195... Line 212...
195 
        futex_up(&unlink_futex);
 212 
        futex_up(&unlink_futex);
196 
    } else {
 213 
    } else {
197 
        /*
 214 
        /*
198 
         * We still don't have the root file system mounted.
 215 
         * We still don't have the root file system mounted.
199 
         */
 216 
         */
200 
        if ((size - FS_NAME_MAXLEN == strlen("/")) &&
 - 
 
201 
            (buf[FS_NAME_MAXLEN] == '/')) {
 217 
        if ((size == 1) && (buf[0] == '/')) {
202 
            /*
 218 
            /*
203 
             * For this simple, but important case, we are done.
 219 
             * For this simple, but important case, we are done.
204 
             */
 220 
             */
205 
            rootfs = mounted_root;
 221 
            rootfs = mounted_root;
206 
            futex_up(&rootfs_futex);
 222 
            futex_up(&rootfs_futex);