[a9fa9b7] | 1 | /* |
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| 2 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
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| 3 | * |
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| 4 | * The license and distribution terms for this file may be |
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| 5 | * found in the file LICENSE in this distribution or at |
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| 6 | * http://www.rtems.com/license/LICENSE. |
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| 7 | * |
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| 8 | * $Id$ |
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| 9 | */ |
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| 10 | /** |
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| 11 | * @file |
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| 12 | * |
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| 13 | * @ingroup rtems-rfs |
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| 14 | * |
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| 15 | * RTEMS File System Interface for RTEMS. |
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| 16 | */ |
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| 17 | |
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[355b0544] | 18 | #if HAVE_CONFIG_H |
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| 19 | #include "config.h" |
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| 20 | #endif |
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| 21 | |
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[a9fa9b7] | 22 | #include <stdlib.h> |
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| 23 | |
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| 24 | #include <rtems/rfs/rtems-rfs-file.h> |
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| 25 | #include <rtems/rfs/rtems-rfs-dir.h> |
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| 26 | #include <rtems/rfs/rtems-rfs-link.h> |
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| 27 | #include "rtems-rfs-rtems.h" |
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| 28 | |
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| 29 | /** |
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| 30 | * The libio permissions for read/execute. |
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| 31 | */ |
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| 32 | #define RTEMS_LIBIO_PERMS_RX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_READ) |
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| 33 | /** |
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| 34 | * The libio permissions for write/execute. |
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| 35 | */ |
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| 36 | #define RTEMS_LIBIO_PERMS_WX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_WRITE) |
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| 37 | |
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| 38 | /** |
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| 39 | * Evaluate the path to a node that wishes to be accessed. The pathloc is |
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| 40 | * returned with the ino to the node to be accessed. |
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| 41 | * |
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| 42 | * The routine starts from the root stripping away any leading path separators |
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| 43 | * breaking the path up into the node names and checking an inode exists for |
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| 44 | * that node name. Permissions are checked to insure access to the node is |
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| 45 | * allowed. A path to a node must be accessable all the way even if the end |
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| 46 | * result is directly accessable. As a user on Linux try "ls /root/../tmp" and |
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| 47 | * you will see if fails. |
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| 48 | * |
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| 49 | * The whole process is complicated by crossmount paths where we head down into |
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| 50 | * this file system only to return to the top and out to a another mounted file |
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| 51 | * system. For example we are mounted on '/e' and the user enters "ls |
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| 52 | * /e/a/b/../../dev". We need to head down then back up. |
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| 53 | * |
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| 54 | * @param path |
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| 55 | * @param pathlen |
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| 56 | * @param flags |
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| 57 | * @param pathloc |
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| 58 | */ |
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| 59 | int |
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| 60 | rtems_rfs_rtems_eval_path (const char* path, |
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| 61 | int pathlen, |
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| 62 | int flags, |
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| 63 | rtems_filesystem_location_info_t* pathloc) |
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| 64 | { |
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| 65 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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| 66 | rtems_rfs_inode_handle inode; |
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| 67 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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| 68 | uint32_t doff = 0; |
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| 69 | const char* node; |
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| 70 | int node_len; |
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| 71 | int stripped; |
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| 72 | int rc; |
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| 73 | |
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| 74 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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| 75 | printf ("rtems-rfs-rtems: eval-path: in: path:%s pathlen:%i ino:%ld\n", |
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| 76 | path, pathlen, ino); |
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| 77 | |
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| 78 | /* |
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| 79 | * Eat any separators at the start of the path. |
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| 80 | */ |
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| 81 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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| 82 | path += stripped; |
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| 83 | pathlen -= stripped; |
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| 84 | |
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| 85 | rtems_rfs_rtems_lock (fs); |
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| 86 | |
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| 87 | while (true) |
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| 88 | { |
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| 89 | /* |
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| 90 | * Open and load the inode. |
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| 91 | */ |
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| 92 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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| 93 | if (rc > 0) |
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| 94 | { |
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| 95 | rtems_rfs_rtems_unlock (fs); |
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| 96 | return rtems_rfs_rtems_error ("eval_path: opening inode", rc); |
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| 97 | } |
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| 98 | |
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| 99 | /* |
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| 100 | * Is this the end of the pathname we where given ? |
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| 101 | */ |
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| 102 | if ((*path == '\0') || (pathlen == 0)) |
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| 103 | break; |
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| 104 | |
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| 105 | /* |
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| 106 | * If a directory the execute bit must be set for us to enter. |
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| 107 | */ |
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| 108 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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| 109 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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| 110 | { |
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| 111 | rtems_rfs_inode_close (fs, &inode); |
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| 112 | rtems_rfs_rtems_unlock (fs); |
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| 113 | return rtems_rfs_rtems_error ("eval_path: eval perms", EACCES); |
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| 114 | } |
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| 115 | |
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| 116 | /* |
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| 117 | * Extract the node name we will look for this time around. |
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| 118 | */ |
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| 119 | node = path; |
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| 120 | node_len = 0; |
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| 121 | while (!rtems_filesystem_is_separator (*path) && |
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| 122 | (*path != '\0') && pathlen && |
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| 123 | (node_len < (rtems_rfs_fs_max_name (fs) - 1))) |
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| 124 | { |
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| 125 | path++; |
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| 126 | pathlen--; |
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| 127 | node_len++; |
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| 128 | } |
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| 129 | |
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| 130 | /* |
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| 131 | * Eat any separators at start of the path. |
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| 132 | */ |
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| 133 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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| 134 | path += stripped; |
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| 135 | pathlen -= stripped; |
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| 136 | node_len += stripped; |
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| 137 | |
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| 138 | /* |
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| 139 | * If the node is the current directory and there is more path to come move |
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| 140 | * on it else we are at the inode we want. |
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| 141 | */ |
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| 142 | if (rtems_rfs_current_dir (node)) |
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| 143 | { |
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| 144 | if (*path) |
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| 145 | continue; |
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| 146 | break; |
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| 147 | } |
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| 148 | |
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| 149 | /* |
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| 150 | * If the node is a parent we must move up one directory. If the location |
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| 151 | * is on another file system we have a crossmount so we call that file |
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| 152 | * system to handle the remainder of the path. |
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| 153 | */ |
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| 154 | if (rtems_rfs_parent_dir (node)) |
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| 155 | { |
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| 156 | /* |
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| 157 | * If we are at root inode of the file system we have a crossmount path. |
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| 158 | */ |
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| 159 | if (ino == RTEMS_RFS_ROOT_INO) |
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| 160 | { |
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| 161 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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| 162 | printf("rtems-rfs-rtems: eval-path: crossmount: path:%s (%d)\n", |
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| 163 | path - node_len, pathlen + node_len); |
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| 164 | rtems_rfs_inode_close (fs, &inode); |
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| 165 | rtems_rfs_rtems_unlock (fs); |
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| 166 | *pathloc = pathloc->mt_entry->mt_point_node; |
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| 167 | return (*pathloc->ops->evalpath_h)(path - node_len, pathlen + node_len, |
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| 168 | flags, pathloc); |
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| 169 | } |
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| 170 | |
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| 171 | /* |
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| 172 | * We need to find the parent of this node. |
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| 173 | */ |
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| 174 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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| 175 | if (rc > 0) |
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| 176 | { |
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| 177 | rtems_rfs_inode_close (fs, &inode); |
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| 178 | rtems_rfs_rtems_unlock (fs); |
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| 179 | return rtems_rfs_rtems_error ("eval_path: read parent inode", rc); |
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| 180 | } |
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| 181 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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| 182 | printf("rtems-rfs-rtems: eval-path: parent: ino:%ld\n", ino); |
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| 183 | } |
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| 184 | else |
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| 185 | { |
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| 186 | /* |
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| 187 | * Look up the node name in this directory. If found drop through, close |
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| 188 | * the current inode and let the loop open the inode so the mode can be |
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| 189 | * read and handlers set. |
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| 190 | */ |
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| 191 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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| 192 | node, node_len - stripped, &ino, &doff); |
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| 193 | if (rc > 0) |
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| 194 | { |
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| 195 | rtems_rfs_inode_close (fs, &inode); |
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| 196 | rtems_rfs_rtems_unlock (fs); |
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| 197 | return ((errno = rc) == 0) ? 0 : -1; |
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| 198 | } |
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| 199 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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| 200 | printf("rtems-rfs-rtems: eval-path: down: path:%s ino:%ld\n", node, ino); |
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| 201 | } |
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| 202 | |
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| 203 | rc = rtems_rfs_inode_close (fs, &inode); |
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| 204 | if (rc > 0) |
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| 205 | { |
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| 206 | rtems_rfs_inode_close (fs, &inode); |
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| 207 | rtems_rfs_rtems_unlock (fs); |
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| 208 | return rtems_rfs_rtems_error ("eval_path: closing node", rc); |
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| 209 | } |
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| 210 | } |
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| 211 | |
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| 212 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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| 213 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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| 214 | |
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| 215 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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| 216 | |
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| 217 | rtems_rfs_inode_close (fs, &inode); |
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| 218 | rtems_rfs_rtems_unlock (fs); |
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| 219 | |
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| 220 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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| 221 | printf("rtems-rfs-rtems: eval-path: ino:%ld\n", ino); |
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| 222 | |
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| 223 | return rc; |
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| 224 | } |
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| 225 | |
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| 226 | /** |
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| 227 | * The following routine evaluates a path for a new node to be created. The |
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| 228 | * pathloc is returned with a pointer to the parent of the new node. The name |
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| 229 | * is returned with a pointer to the first character in the new node name. The |
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| 230 | * parent node is verified to be a directory. |
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| 231 | * |
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| 232 | * @param path |
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| 233 | * @param pathloc |
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| 234 | * @param name |
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| 235 | * @return int |
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| 236 | */ |
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| 237 | int |
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| 238 | rtems_rfs_rtems_eval_for_make (const char* path, |
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| 239 | rtems_filesystem_location_info_t* pathloc, |
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| 240 | const char** name) |
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| 241 | { |
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| 242 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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| 243 | rtems_rfs_inode_handle inode; |
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| 244 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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| 245 | rtems_rfs_ino node_ino; |
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| 246 | uint32_t doff = 0; |
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| 247 | const char* node; |
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| 248 | int node_len; |
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| 249 | int stripped; |
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| 250 | int rc; |
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| 251 | |
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| 252 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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| 253 | printf ("rtems-rfs-rtems: eval-for-make: path:%s ino:%ld\n", path, ino); |
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| 254 | |
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| 255 | *name = path + strlen (path); |
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| 256 | |
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| 257 | while (*name != path) |
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| 258 | { |
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| 259 | (*name)--; |
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| 260 | if (rtems_filesystem_is_separator (**name)) |
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| 261 | { |
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| 262 | (*name)++; |
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| 263 | break; |
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| 264 | } |
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| 265 | } |
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| 266 | |
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| 267 | /* |
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| 268 | * Eat any separators at start of the path. |
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| 269 | */ |
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| 270 | stripped = rtems_filesystem_prefix_separators (path, strlen(path)); |
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| 271 | path += stripped; |
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| 272 | |
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| 273 | rtems_rfs_rtems_lock (fs); |
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| 274 | |
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| 275 | while (true) |
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| 276 | { |
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| 277 | /* |
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| 278 | * Open and load the inode. |
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| 279 | */ |
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| 280 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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| 281 | if (rc > 0) |
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| 282 | { |
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| 283 | rtems_rfs_rtems_unlock (fs); |
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| 284 | return rtems_rfs_rtems_error ("eval_for_make: read ino", rc); |
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| 285 | } |
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| 286 | |
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| 287 | /* |
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| 288 | * If a directory the execute bit must be set for us to enter. |
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| 289 | */ |
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| 290 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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| 291 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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| 292 | { |
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| 293 | rtems_rfs_inode_close (fs, &inode); |
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| 294 | rtems_rfs_rtems_unlock (fs); |
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| 295 | return rtems_rfs_rtems_error ("eval_for_make: eval perms", EACCES); |
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| 296 | } |
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| 297 | |
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| 298 | /* |
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| 299 | * Is this the end of the pathname we where given ? |
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| 300 | */ |
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| 301 | if (path == *name) |
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| 302 | break; |
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| 303 | |
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| 304 | /* |
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| 305 | * Extract the node name we will look for this time around. |
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| 306 | */ |
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| 307 | node = path; |
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| 308 | node_len = 0; |
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| 309 | while (!rtems_filesystem_is_separator(*path) && |
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| 310 | (*path != '\0') && |
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| 311 | (node_len < (rtems_rfs_fs_max_name (fs) - 1))) |
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| 312 | { |
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| 313 | node_len++; |
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| 314 | path++; |
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| 315 | } |
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| 316 | |
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| 317 | /* |
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| 318 | * Eat any separators at start of the new path. |
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| 319 | */ |
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| 320 | stripped = rtems_filesystem_prefix_separators (path, strlen (path)); |
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| 321 | path += stripped; |
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| 322 | node_len += stripped; |
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| 323 | |
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| 324 | /* |
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| 325 | * If the node is the current directory and there is more path to come move |
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| 326 | * on it else we are at the inode we want. |
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| 327 | */ |
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| 328 | if (rtems_rfs_current_dir (node)) |
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| 329 | { |
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| 330 | if (*path) |
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| 331 | continue; |
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| 332 | break; |
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| 333 | } |
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| 334 | |
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| 335 | /* |
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| 336 | * If the node is a parent we must move up one directory. If the location |
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| 337 | * is on another file system we have a crossmount so we call that file |
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| 338 | * system to handle the remainder of the path. |
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| 339 | */ |
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| 340 | if (rtems_rfs_parent_dir (path)) |
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| 341 | { |
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| 342 | /* |
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| 343 | * If we are at the root inode of the file system we have a crossmount |
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| 344 | * path. |
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| 345 | */ |
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| 346 | if (ino == RTEMS_RFS_ROOT_INO) |
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| 347 | { |
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| 348 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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| 349 | printf("rtems-rfs-rtems: eval-for-make: crossmount: path:%s\n", |
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| 350 | path - node_len); |
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| 351 | |
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| 352 | rtems_rfs_inode_close (fs, &inode); |
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| 353 | rtems_rfs_rtems_unlock (fs); |
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| 354 | *pathloc = pathloc->mt_entry->mt_point_node; |
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| 355 | return (*pathloc->ops->evalformake_h)(path - node_len, pathloc, name); |
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| 356 | } |
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| 357 | |
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| 358 | /* |
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| 359 | * If not a directory give and up return. We cannot change dir from a |
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| 360 | * regular file or device node. |
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| 361 | */ |
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| 362 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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| 363 | { |
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| 364 | rtems_rfs_inode_close (fs, &inode); |
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| 365 | rtems_rfs_rtems_unlock (fs); |
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| 366 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTSUP); |
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| 367 | } |
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| 368 | |
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| 369 | /* |
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| 370 | * We need to find the parent of this node. |
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| 371 | */ |
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| 372 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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| 373 | if (rc > 0) |
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| 374 | { |
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| 375 | rtems_rfs_inode_close (fs, &inode); |
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| 376 | rtems_rfs_rtems_unlock (fs); |
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| 377 | return rtems_rfs_rtems_error ("eval_for_make: read parent inode", rc); |
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| 378 | } |
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| 379 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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| 380 | printf ("rtems-rfs-rtems: eval-for-make: parent: ino:%ld\n", ino); |
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| 381 | } |
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| 382 | else |
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| 383 | { |
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| 384 | /* |
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| 385 | * Read the inode so we know it exists and what type it is. |
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| 386 | */ |
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| 387 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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| 388 | node, node_len - stripped, &ino, &doff); |
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| 389 | if (rc > 0) |
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| 390 | { |
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| 391 | rtems_rfs_inode_close (fs, &inode); |
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| 392 | rtems_rfs_rtems_unlock (fs); |
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| 393 | return rtems_rfs_rtems_error ("eval_for_make: reading inode", rc); |
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| 394 | } |
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| 395 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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| 396 | printf("rtems-rfs-rtems: eval-for-make: down: path:%s ino:%ld\n", |
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| 397 | node, ino); |
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| 398 | } |
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| 399 | |
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| 400 | rc = rtems_rfs_inode_close (fs, &inode); |
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| 401 | if (rc > 0) |
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| 402 | { |
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| 403 | rtems_rfs_rtems_unlock (fs); |
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| 404 | return rtems_rfs_rtems_error ("eval_for_make: closing node", rc); |
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| 405 | } |
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| 406 | } |
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| 407 | |
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| 408 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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| 409 | { |
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| 410 | rtems_rfs_inode_close (fs, &inode); |
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| 411 | rtems_rfs_rtems_unlock (fs); |
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| 412 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTDIR); |
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| 413 | } |
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| 414 | |
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| 415 | if (!rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_WX)) |
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| 416 | { |
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| 417 | rtems_rfs_inode_close (fs, &inode); |
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| 418 | rtems_rfs_rtems_unlock (fs); |
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| 419 | return rtems_rfs_rtems_error ("eval_for_make: cannot write", EACCES); |
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| 420 | } |
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| 421 | |
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| 422 | /* |
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| 423 | * Make sure the name does not already exists in the directory. |
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| 424 | */ |
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| 425 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, *name, strlen (*name), |
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| 426 | &node_ino, &doff); |
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| 427 | if (rc == 0) |
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| 428 | { |
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| 429 | rtems_rfs_inode_close (fs, &inode); |
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| 430 | rtems_rfs_rtems_unlock (fs); |
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| 431 | return rtems_rfs_rtems_error ("eval_for_make: found name", EEXIST); |
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| 432 | } |
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| 433 | |
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| 434 | if (rc != ENOENT) |
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| 435 | { |
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| 436 | rtems_rfs_inode_close (fs, &inode); |
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| 437 | rtems_rfs_rtems_unlock (fs); |
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| 438 | return rtems_rfs_rtems_error ("eval_for_make: look up", rc); |
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| 439 | } |
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| 440 | |
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| 441 | /* |
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| 442 | * Set the parent ino in the path location. |
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| 443 | */ |
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| 444 | |
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| 445 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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| 446 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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| 447 | |
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| 448 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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| 449 | |
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| 450 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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| 451 | printf("rtems-rfs-rtems: eval-for-make: parent ino:%ld name:%s\n", |
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| 452 | ino, *name); |
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| 453 | |
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| 454 | rtems_rfs_inode_close (fs, &inode); |
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| 455 | rtems_rfs_rtems_unlock (fs); |
---|
| 456 | |
---|
| 457 | return rc; |
---|
| 458 | } |
---|
| 459 | |
---|
| 460 | /** |
---|
| 461 | * The following rouine creates a new link node under parent with the name |
---|
| 462 | * given in name. The link node is set to point to the node at to_loc. |
---|
| 463 | * |
---|
| 464 | * @param to_loc |
---|
| 465 | * @param parent_loc |
---|
| 466 | * @param name |
---|
| 467 | * @return int |
---|
| 468 | */ |
---|
| 469 | int |
---|
| 470 | rtems_rfs_rtems_link (rtems_filesystem_location_info_t* to_loc, |
---|
| 471 | rtems_filesystem_location_info_t* parent_loc, |
---|
| 472 | const char* name) |
---|
| 473 | { |
---|
| 474 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (to_loc); |
---|
| 475 | rtems_rfs_ino target = rtems_rfs_rtems_get_pathloc_ino (to_loc); |
---|
| 476 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
| 477 | int rc; |
---|
| 478 | |
---|
| 479 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_LINK)) |
---|
| 480 | printf ("rtems-rfs-rtems: link: in: parent:%ld target:%ld\n", |
---|
| 481 | parent, target); |
---|
| 482 | |
---|
| 483 | rtems_rfs_rtems_lock (fs); |
---|
| 484 | |
---|
[8ec7abb] | 485 | rc = rtems_rfs_link (fs, name, strlen (name), parent, target, false); |
---|
[a9fa9b7] | 486 | if (rc) |
---|
| 487 | { |
---|
| 488 | rtems_rfs_rtems_unlock (fs); |
---|
| 489 | return rtems_rfs_rtems_error ("link: linking", rc); |
---|
| 490 | } |
---|
| 491 | |
---|
| 492 | rtems_rfs_rtems_unlock (fs); |
---|
| 493 | |
---|
| 494 | return 0; |
---|
| 495 | } |
---|
| 496 | |
---|
| 497 | /** |
---|
| 498 | * Routine to remove a link node from the file system. |
---|
| 499 | * |
---|
| 500 | * @param parent_loc |
---|
| 501 | * @param loc |
---|
| 502 | * @return int |
---|
| 503 | */ |
---|
| 504 | |
---|
| 505 | int |
---|
| 506 | rtems_rfs_rtems_unlink (rtems_filesystem_location_info_t* parent_loc, |
---|
| 507 | rtems_filesystem_location_info_t* loc) |
---|
| 508 | { |
---|
| 509 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
| 510 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
| 511 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (loc); |
---|
| 512 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (loc); |
---|
| 513 | int rc; |
---|
| 514 | |
---|
| 515 | rtems_rfs_rtems_lock (fs); |
---|
| 516 | |
---|
| 517 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_UNLINK)) |
---|
| 518 | printf("rtems-rfs-rtems: unlink: parent:%ld doff:%lu ino:%ld\n", |
---|
| 519 | parent, doff, ino); |
---|
| 520 | |
---|
[8ec7abb] | 521 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
---|
[a9fa9b7] | 522 | if (rc) |
---|
| 523 | { |
---|
| 524 | rtems_rfs_rtems_unlock (fs); |
---|
| 525 | return rtems_rfs_rtems_error ("unlink: unlink inode", rc); |
---|
| 526 | } |
---|
| 527 | |
---|
| 528 | rtems_rfs_rtems_unlock (fs); |
---|
| 529 | |
---|
| 530 | return 0; |
---|
| 531 | } |
---|
| 532 | |
---|
| 533 | /** |
---|
| 534 | * The following verifies that and returns the type of node that the loc refers |
---|
| 535 | * to. |
---|
| 536 | * |
---|
| 537 | * @param pathloc |
---|
| 538 | * @return rtems_filesystem_node_types_t |
---|
| 539 | */ |
---|
| 540 | |
---|
| 541 | rtems_filesystem_node_types_t |
---|
| 542 | rtems_rfs_rtems_node_type (rtems_filesystem_location_info_t* pathloc) |
---|
| 543 | { |
---|
| 544 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 545 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 546 | rtems_filesystem_node_types_t type; |
---|
| 547 | rtems_rfs_inode_handle inode; |
---|
| 548 | uint16_t mode; |
---|
| 549 | int rc; |
---|
| 550 | |
---|
| 551 | rtems_rfs_rtems_lock (fs); |
---|
| 552 | |
---|
| 553 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 554 | if (rc > 0) |
---|
| 555 | { |
---|
| 556 | rtems_rfs_rtems_unlock (fs); |
---|
| 557 | return rtems_rfs_rtems_error ("node_type: opening inode", rc); |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | /* |
---|
| 561 | * Do not return RTEMS_FILESYSTEM_HARD_LINK because this would result in an |
---|
| 562 | * eval link which does not make sense in the case of the RFS file |
---|
| 563 | * system. All directory entries are links to an inode. A link such as a HARD |
---|
| 564 | * link is actually the normal path to a regular file, directory, device |
---|
| 565 | * etc's inode. Links to inodes can be considered "the real" one, yet they |
---|
| 566 | * are all links. |
---|
| 567 | */ |
---|
| 568 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
| 569 | if (RTEMS_RFS_S_ISDIR (mode)) |
---|
| 570 | type = RTEMS_FILESYSTEM_DIRECTORY; |
---|
| 571 | else if (RTEMS_RFS_S_ISLNK (mode)) |
---|
| 572 | type = RTEMS_FILESYSTEM_SYM_LINK; |
---|
| 573 | else if (RTEMS_RFS_S_ISBLK (mode) || RTEMS_RFS_S_ISCHR (mode)) |
---|
| 574 | type = RTEMS_FILESYSTEM_DEVICE; |
---|
| 575 | else |
---|
| 576 | type = RTEMS_FILESYSTEM_MEMORY_FILE; |
---|
| 577 | |
---|
| 578 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 579 | if (rc > 0) |
---|
| 580 | { |
---|
| 581 | rtems_rfs_rtems_unlock (fs); |
---|
| 582 | return rtems_rfs_rtems_error ("node_type: closing inode", rc); |
---|
| 583 | } |
---|
| 584 | |
---|
| 585 | rtems_rfs_rtems_unlock (fs); |
---|
| 586 | |
---|
| 587 | return type; |
---|
| 588 | } |
---|
| 589 | |
---|
| 590 | /** |
---|
| 591 | * This routine is the implementation of the chown() system call for the |
---|
| 592 | * RFS. |
---|
| 593 | * |
---|
| 594 | * @param pathloc |
---|
| 595 | * @param owner |
---|
| 596 | * @param group |
---|
| 597 | * return int |
---|
| 598 | */ |
---|
| 599 | |
---|
| 600 | static int |
---|
| 601 | rtems_rfs_rtems_chown (rtems_filesystem_location_info_t *pathloc, |
---|
| 602 | uid_t owner, |
---|
| 603 | gid_t group) |
---|
| 604 | { |
---|
| 605 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 606 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 607 | rtems_rfs_inode_handle inode; |
---|
| 608 | #if defined (RTEMS_POSIX_API) |
---|
| 609 | uid_t uid; |
---|
| 610 | #endif |
---|
| 611 | int rc; |
---|
| 612 | |
---|
| 613 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_CHOWN)) |
---|
| 614 | printf ("rtems-rfs-rtems: chown: in: ino:%ld uid:%d gid:%d\n", |
---|
| 615 | ino, owner, group); |
---|
| 616 | |
---|
| 617 | rtems_rfs_rtems_lock (fs); |
---|
| 618 | |
---|
| 619 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 620 | if (rc > 0) |
---|
| 621 | { |
---|
| 622 | rtems_rfs_rtems_unlock (fs); |
---|
| 623 | return rtems_rfs_rtems_error ("chown: opening inode", rc); |
---|
| 624 | } |
---|
| 625 | |
---|
| 626 | /* |
---|
| 627 | * Verify I am the owner of the node or the super user. |
---|
| 628 | */ |
---|
| 629 | |
---|
| 630 | #if defined (RTEMS_POSIX_API) |
---|
| 631 | uid = geteuid(); |
---|
| 632 | |
---|
| 633 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
| 634 | { |
---|
| 635 | rtems_rfs_inode_close (fs, &inode); |
---|
| 636 | rtems_rfs_rtems_unlock (fs); |
---|
| 637 | return rtems_rfs_rtems_error ("chown: not able", EPERM); |
---|
| 638 | } |
---|
| 639 | #endif |
---|
| 640 | |
---|
| 641 | rtems_rfs_inode_set_uid_gid (&inode, owner, group); |
---|
| 642 | |
---|
| 643 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 644 | if (rc) |
---|
| 645 | { |
---|
| 646 | rtems_rfs_rtems_unlock (fs); |
---|
| 647 | return rtems_rfs_rtems_error ("chown: closing inode", rc); |
---|
| 648 | } |
---|
| 649 | |
---|
| 650 | rtems_rfs_rtems_unlock (fs); |
---|
| 651 | |
---|
| 652 | return 0; |
---|
| 653 | } |
---|
| 654 | |
---|
| 655 | /** |
---|
| 656 | * This routine is the RFS free node handler for the file system operations |
---|
| 657 | * table. The RFS does not need to free anything. |
---|
| 658 | * |
---|
| 659 | * @param pathloc |
---|
| 660 | * @retval 0 Always returned. |
---|
| 661 | */ |
---|
| 662 | |
---|
| 663 | int |
---|
| 664 | rtems_rfs_rtems_freenodinfo (rtems_filesystem_location_info_t* pathloc) |
---|
| 665 | { |
---|
| 666 | return 0; |
---|
| 667 | } |
---|
| 668 | |
---|
| 669 | /** |
---|
| 670 | * This routine is the implementation of the utime() system call for the |
---|
| 671 | * RFS. |
---|
| 672 | * |
---|
| 673 | * @param pathloc |
---|
| 674 | * @param atime |
---|
| 675 | * @param mtime |
---|
| 676 | * return int |
---|
| 677 | */ |
---|
| 678 | |
---|
| 679 | int |
---|
| 680 | rtems_rfs_rtems_utime(rtems_filesystem_location_info_t* pathloc, |
---|
| 681 | time_t atime, |
---|
| 682 | time_t mtime) |
---|
| 683 | { |
---|
| 684 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 685 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 686 | rtems_rfs_inode_handle inode; |
---|
| 687 | int rc; |
---|
| 688 | |
---|
| 689 | rtems_rfs_rtems_lock (fs); |
---|
| 690 | |
---|
| 691 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 692 | if (rc) |
---|
| 693 | { |
---|
| 694 | rtems_rfs_rtems_unlock (fs); |
---|
| 695 | return rtems_rfs_rtems_error ("utime: read inode", rc); |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | rtems_rfs_inode_set_atime (&inode, atime); |
---|
| 699 | rtems_rfs_inode_set_mtime (&inode, mtime); |
---|
| 700 | |
---|
| 701 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 702 | if (rc) |
---|
| 703 | { |
---|
| 704 | rtems_rfs_rtems_unlock (fs); |
---|
| 705 | return rtems_rfs_rtems_error ("utime: closing inode", rc); |
---|
| 706 | } |
---|
| 707 | |
---|
| 708 | rtems_rfs_rtems_unlock (fs); |
---|
| 709 | |
---|
| 710 | return 0; |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | /** |
---|
| 714 | * The following rouine creates a new symbolic link node under parent with the |
---|
| 715 | * name given in name. The node is set to point to the node at to_loc. |
---|
| 716 | * |
---|
| 717 | * @param parent_loc |
---|
| 718 | * @param link_name |
---|
| 719 | * @param node_name |
---|
| 720 | * return int |
---|
| 721 | */ |
---|
| 722 | |
---|
| 723 | int |
---|
| 724 | rtems_rfs_rtems_symlink (rtems_filesystem_location_info_t* parent_loc, |
---|
| 725 | const char* link_name, |
---|
| 726 | const char* node_name) |
---|
| 727 | { |
---|
| 728 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
| 729 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
| 730 | uid_t uid; |
---|
| 731 | gid_t gid; |
---|
| 732 | int rc; |
---|
| 733 | |
---|
| 734 | #if defined(RTEMS_POSIX_API) |
---|
| 735 | uid = geteuid (); |
---|
| 736 | gid = getegid (); |
---|
| 737 | #else |
---|
| 738 | uid = 0; |
---|
| 739 | gid = 0; |
---|
| 740 | #endif |
---|
| 741 | |
---|
| 742 | rtems_rfs_rtems_lock (fs); |
---|
| 743 | |
---|
| 744 | rc = rtems_rfs_symlink (fs, node_name, strlen (node_name), |
---|
| 745 | link_name, strlen (link_name), |
---|
| 746 | uid, gid, parent); |
---|
| 747 | if (rc) |
---|
| 748 | { |
---|
| 749 | rtems_rfs_rtems_unlock (fs); |
---|
| 750 | return rtems_rfs_rtems_error ("symlink: linking", rc); |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | rtems_rfs_rtems_unlock (fs); |
---|
| 754 | |
---|
| 755 | return 0; |
---|
| 756 | } |
---|
| 757 | |
---|
| 758 | /** |
---|
| 759 | * The following rouine puts the symblic links destination name into buf. |
---|
| 760 | * |
---|
| 761 | * @param loc |
---|
| 762 | * @param buf |
---|
| 763 | * @param bufsize |
---|
| 764 | * @return int |
---|
| 765 | */ |
---|
| 766 | |
---|
| 767 | int |
---|
| 768 | rtems_rfs_rtems_readlink (rtems_filesystem_location_info_t* pathloc, |
---|
| 769 | char* buf, |
---|
| 770 | size_t bufsize) |
---|
| 771 | { |
---|
| 772 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 773 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 774 | size_t length; |
---|
| 775 | int rc; |
---|
| 776 | |
---|
| 777 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_READLINK)) |
---|
| 778 | printf ("rtems-rfs-rtems: readlink: in: ino:%ld\n", ino); |
---|
| 779 | |
---|
| 780 | rtems_rfs_rtems_lock (fs); |
---|
| 781 | |
---|
| 782 | rc = rtems_rfs_symlink_read (fs, ino, buf, bufsize, &length); |
---|
| 783 | if (rc) |
---|
| 784 | { |
---|
| 785 | rtems_rfs_rtems_unlock (fs); |
---|
| 786 | return rtems_rfs_rtems_error ("readlink: reading link", rc); |
---|
| 787 | } |
---|
| 788 | |
---|
| 789 | rtems_rfs_rtems_unlock (fs); |
---|
| 790 | |
---|
| 791 | return (int) length; |
---|
| 792 | } |
---|
| 793 | |
---|
| 794 | /** |
---|
| 795 | * File change mode routine. |
---|
| 796 | * |
---|
| 797 | * @param pathloc |
---|
| 798 | * @param mode |
---|
| 799 | * @return int |
---|
| 800 | */ |
---|
| 801 | int |
---|
| 802 | rtems_rfs_rtems_fchmod (rtems_filesystem_location_info_t* pathloc, |
---|
| 803 | mode_t mode) |
---|
| 804 | { |
---|
| 805 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 806 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 807 | rtems_rfs_inode_handle inode; |
---|
| 808 | uint16_t imode; |
---|
| 809 | #if defined (RTEMS_POSIX_API) |
---|
| 810 | uid_t uid; |
---|
| 811 | #endif |
---|
| 812 | int rc; |
---|
| 813 | |
---|
| 814 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FCHMOD)) |
---|
| 815 | printf ("rtems-rfs-rtems: fchmod: in: ino:%ld mode:%06o\n", |
---|
[1d539c0] | 816 | ino, (unsigned int) mode); |
---|
[a9fa9b7] | 817 | |
---|
| 818 | rtems_rfs_rtems_lock (fs); |
---|
| 819 | |
---|
| 820 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 821 | if (rc) |
---|
| 822 | { |
---|
| 823 | rtems_rfs_rtems_unlock (fs); |
---|
| 824 | return rtems_rfs_rtems_error ("fchmod: opening inode", rc); |
---|
| 825 | } |
---|
| 826 | |
---|
| 827 | imode = rtems_rfs_inode_get_mode (&inode); |
---|
| 828 | |
---|
| 829 | /* |
---|
| 830 | * Verify I am the owner of the node or the super user. |
---|
| 831 | */ |
---|
| 832 | #if defined (RTEMS_POSIX_API) |
---|
| 833 | uid = geteuid(); |
---|
| 834 | |
---|
| 835 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
| 836 | { |
---|
| 837 | rtems_rfs_inode_close (fs, &inode); |
---|
| 838 | rtems_rfs_rtems_unlock (fs); |
---|
| 839 | return rtems_rfs_rtems_error ("fchmod: not owner", EPERM); |
---|
| 840 | } |
---|
| 841 | #endif |
---|
| 842 | |
---|
| 843 | imode &= ~(S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
| 844 | imode |= mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
| 845 | |
---|
| 846 | rtems_rfs_inode_set_mode (&inode, imode); |
---|
| 847 | |
---|
| 848 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 849 | if (rc > 0) |
---|
| 850 | { |
---|
| 851 | rtems_rfs_rtems_unlock (fs); |
---|
| 852 | return rtems_rfs_rtems_error ("fchmod: closing inode", rc); |
---|
| 853 | } |
---|
| 854 | |
---|
| 855 | rtems_rfs_rtems_unlock (fs); |
---|
| 856 | |
---|
| 857 | return 0; |
---|
| 858 | } |
---|
| 859 | |
---|
| 860 | /** |
---|
| 861 | * The following routine does a fcntl on an node. |
---|
| 862 | * |
---|
| 863 | * @param cmd |
---|
| 864 | * @param iop |
---|
| 865 | * @return int |
---|
| 866 | */ |
---|
| 867 | |
---|
| 868 | int |
---|
| 869 | rtems_rfs_rtems_fcntl (int cmd, |
---|
| 870 | rtems_libio_t* iop) |
---|
| 871 | { |
---|
| 872 | return 0; |
---|
| 873 | } |
---|
| 874 | |
---|
| 875 | /** |
---|
| 876 | * The following routine does a stat on a node. |
---|
| 877 | * |
---|
| 878 | * @param pathloc |
---|
| 879 | * @param buf |
---|
| 880 | * @return int |
---|
| 881 | */ |
---|
| 882 | |
---|
| 883 | int |
---|
| 884 | rtems_rfs_rtems_stat (rtems_filesystem_location_info_t* pathloc, |
---|
| 885 | struct stat* buf) |
---|
| 886 | { |
---|
| 887 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 888 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 889 | rtems_rfs_inode_handle inode; |
---|
| 890 | rtems_rfs_file_shared* shared; |
---|
| 891 | uint16_t mode; |
---|
| 892 | int rc; |
---|
| 893 | |
---|
| 894 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) |
---|
| 895 | printf ("rtems-rfs-rtems: stat: in: ino:%ld\n", ino); |
---|
| 896 | |
---|
| 897 | rtems_rfs_rtems_lock (fs); |
---|
| 898 | |
---|
| 899 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 900 | if (rc) |
---|
| 901 | { |
---|
| 902 | rtems_rfs_rtems_unlock (fs); |
---|
| 903 | return rtems_rfs_rtems_error ("stat: opening inode", rc); |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
| 907 | |
---|
| 908 | if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) |
---|
| 909 | { |
---|
| 910 | buf->st_rdev = |
---|
| 911 | rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), |
---|
| 912 | rtems_rfs_inode_get_block (&inode, 1)); |
---|
| 913 | } |
---|
| 914 | |
---|
| 915 | buf->st_dev = rtems_rfs_fs_device (fs); |
---|
| 916 | buf->st_ino = ino; |
---|
| 917 | buf->st_mode = rtems_rfs_rtems_mode (mode); |
---|
| 918 | buf->st_nlink = rtems_rfs_inode_get_links (&inode); |
---|
| 919 | buf->st_uid = rtems_rfs_inode_get_uid (&inode); |
---|
| 920 | buf->st_gid = rtems_rfs_inode_get_gid (&inode); |
---|
| 921 | |
---|
| 922 | /* |
---|
| 923 | * Need to check is the ino is an open file. If so we take the values from |
---|
| 924 | * the open file rather than the inode. |
---|
| 925 | */ |
---|
| 926 | shared = rtems_rfs_file_get_shared (fs, ino); |
---|
| 927 | |
---|
| 928 | if (shared) |
---|
| 929 | { |
---|
| 930 | buf->st_atime = rtems_rfs_file_shared_get_atime (shared); |
---|
| 931 | buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); |
---|
| 932 | buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); |
---|
| 933 | buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); |
---|
| 934 | |
---|
| 935 | if (S_ISLNK (buf->st_mode)) |
---|
| 936 | buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); |
---|
| 937 | else |
---|
| 938 | buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); |
---|
| 939 | } |
---|
| 940 | else |
---|
| 941 | { |
---|
| 942 | buf->st_atime = rtems_rfs_inode_get_atime (&inode); |
---|
| 943 | buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); |
---|
| 944 | buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); |
---|
| 945 | buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); |
---|
| 946 | |
---|
| 947 | if (S_ISLNK (buf->st_mode)) |
---|
| 948 | buf->st_size = rtems_rfs_inode_get_block_offset (&inode); |
---|
| 949 | else |
---|
| 950 | buf->st_size = rtems_rfs_inode_get_size (fs, &inode); |
---|
| 951 | } |
---|
| 952 | |
---|
| 953 | buf->st_blksize = rtems_rfs_fs_block_size (fs); |
---|
| 954 | |
---|
| 955 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 956 | if (rc > 0) |
---|
| 957 | { |
---|
| 958 | rtems_rfs_rtems_unlock (fs); |
---|
| 959 | return rtems_rfs_rtems_error ("stat: closing inode", rc); |
---|
| 960 | } |
---|
| 961 | |
---|
| 962 | rtems_rfs_rtems_unlock (fs); |
---|
| 963 | return 0; |
---|
| 964 | } |
---|
| 965 | |
---|
| 966 | /** |
---|
| 967 | * Routine to create a node in the RFS file system. |
---|
| 968 | * |
---|
| 969 | * @param name |
---|
| 970 | * @param mode |
---|
| 971 | * @param dev |
---|
| 972 | * @param pathloc |
---|
| 973 | * @return int |
---|
| 974 | */ |
---|
| 975 | |
---|
| 976 | int |
---|
| 977 | rtems_rfs_rtems_mknod (const char *name, |
---|
| 978 | mode_t mode, |
---|
| 979 | dev_t dev, |
---|
| 980 | rtems_filesystem_location_info_t *pathloc) |
---|
| 981 | { |
---|
| 982 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 983 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 984 | rtems_rfs_ino ino; |
---|
| 985 | rtems_rfs_inode_handle inode; |
---|
| 986 | uid_t uid; |
---|
| 987 | gid_t gid; |
---|
| 988 | int rc; |
---|
| 989 | |
---|
| 990 | #if defined(RTEMS_POSIX_API) |
---|
| 991 | uid = geteuid (); |
---|
| 992 | gid = getegid (); |
---|
| 993 | #else |
---|
| 994 | uid = 0; |
---|
| 995 | gid = 0; |
---|
| 996 | #endif |
---|
| 997 | |
---|
| 998 | rtems_rfs_rtems_lock (fs); |
---|
| 999 | |
---|
| 1000 | rc = rtems_rfs_inode_create (fs, parent, name, strlen (name), |
---|
| 1001 | rtems_rfs_rtems_imode (mode), |
---|
| 1002 | 1, uid, gid, &ino); |
---|
| 1003 | if (rc > 0) |
---|
| 1004 | { |
---|
| 1005 | rtems_rfs_rtems_unlock (fs); |
---|
| 1006 | return rtems_rfs_rtems_error ("mknod: inode create", rc); |
---|
| 1007 | } |
---|
| 1008 | |
---|
| 1009 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
| 1010 | if (rc > 0) |
---|
| 1011 | { |
---|
| 1012 | rtems_rfs_rtems_unlock (fs); |
---|
| 1013 | return rtems_rfs_rtems_error ("mknod: inode open", rc); |
---|
| 1014 | } |
---|
| 1015 | |
---|
| 1016 | if (S_ISDIR(mode) || S_ISREG(mode)) |
---|
| 1017 | { |
---|
| 1018 | } |
---|
| 1019 | else if (S_ISCHR (mode) || S_ISBLK (mode)) |
---|
| 1020 | { |
---|
| 1021 | int major; |
---|
| 1022 | int minor; |
---|
| 1023 | rtems_filesystem_split_dev_t (dev, major, minor); |
---|
| 1024 | rtems_rfs_inode_set_block (&inode, 0, major); |
---|
| 1025 | rtems_rfs_inode_set_block (&inode, 1, minor); |
---|
| 1026 | } |
---|
| 1027 | else |
---|
| 1028 | { |
---|
| 1029 | rtems_rfs_inode_close (fs, &inode); |
---|
| 1030 | rtems_rfs_rtems_unlock (fs); |
---|
| 1031 | return rtems_rfs_rtems_error ("mknod: bad mode", EINVAL); |
---|
| 1032 | } |
---|
| 1033 | |
---|
| 1034 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
| 1035 | if (rc > 0) |
---|
| 1036 | { |
---|
| 1037 | rtems_rfs_rtems_unlock (fs); |
---|
| 1038 | return rtems_rfs_rtems_error ("mknod: closing inode", rc); |
---|
| 1039 | } |
---|
| 1040 | |
---|
| 1041 | rtems_rfs_rtems_unlock (fs); |
---|
| 1042 | return 0; |
---|
| 1043 | } |
---|
| 1044 | |
---|
| 1045 | /** |
---|
| 1046 | * Routine to remove a node from the RFS file system. |
---|
| 1047 | * |
---|
| 1048 | * @param parent_pathloc |
---|
| 1049 | * @param pathloc |
---|
[8ec7abb] | 1050 | * @return int |
---|
[a9fa9b7] | 1051 | */ |
---|
| 1052 | int |
---|
| 1053 | rtems_rfs_rtems_rmnod (rtems_filesystem_location_info_t* parent_pathloc, |
---|
| 1054 | rtems_filesystem_location_info_t* pathloc) |
---|
| 1055 | { |
---|
| 1056 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
| 1057 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); |
---|
| 1058 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
| 1059 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); |
---|
| 1060 | int rc; |
---|
| 1061 | |
---|
| 1062 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RMNOD)) |
---|
| 1063 | printf ("rtems-rfs: rmnod: parent:%ld doff:%lu, ino:%ld\n", |
---|
| 1064 | parent, doff, ino); |
---|
| 1065 | |
---|
| 1066 | rtems_rfs_rtems_lock (fs); |
---|
| 1067 | |
---|
[8ec7abb] | 1068 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
---|
[a9fa9b7] | 1069 | if (rc) |
---|
| 1070 | { |
---|
| 1071 | rtems_rfs_rtems_unlock (fs); |
---|
| 1072 | return rtems_rfs_rtems_error ("rmnod: unlinking", rc); |
---|
| 1073 | } |
---|
| 1074 | |
---|
| 1075 | rtems_rfs_rtems_unlock (fs); |
---|
| 1076 | return 0; |
---|
| 1077 | } |
---|
| 1078 | |
---|
| 1079 | /** |
---|
| 1080 | * The following routine does a sync on an inode node. Currently it flushes |
---|
| 1081 | * everything related to this device. |
---|
| 1082 | * |
---|
| 1083 | * @param iop |
---|
[8ec7abb] | 1084 | * @return int |
---|
[a9fa9b7] | 1085 | */ |
---|
| 1086 | int |
---|
| 1087 | rtems_rfs_rtems_fdatasync (rtems_libio_t* iop) |
---|
| 1088 | { |
---|
| 1089 | int rc; |
---|
| 1090 | |
---|
| 1091 | rc = rtems_rfs_buffer_sync (rtems_rfs_rtems_pathloc_dev (&iop->pathinfo)); |
---|
| 1092 | if (rc) |
---|
| 1093 | return rtems_rfs_rtems_error ("fdatasync: sync", rc); |
---|
| 1094 | |
---|
| 1095 | return 0; |
---|
| 1096 | } |
---|
| 1097 | |
---|
[8ec7abb] | 1098 | /** |
---|
| 1099 | * Rename the node. |
---|
| 1100 | * |
---|
| 1101 | * @param old_parent_loc The old name's parent location. |
---|
| 1102 | * @param old_loc The old name's location. |
---|
| 1103 | * @param new_parent_loc The new name's parent location. |
---|
| 1104 | * @param new_name The new name. |
---|
| 1105 | * @return int |
---|
| 1106 | */ |
---|
| 1107 | int |
---|
| 1108 | rtems_rfs_rtems_rename(rtems_filesystem_location_info_t* old_parent_loc, |
---|
| 1109 | rtems_filesystem_location_info_t* old_loc, |
---|
| 1110 | rtems_filesystem_location_info_t* new_parent_loc, |
---|
| 1111 | const char* new_name) |
---|
| 1112 | { |
---|
| 1113 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (old_loc); |
---|
| 1114 | rtems_rfs_ino old_parent; |
---|
| 1115 | rtems_rfs_ino new_parent; |
---|
| 1116 | rtems_rfs_ino ino; |
---|
| 1117 | uint32_t doff; |
---|
| 1118 | int rc; |
---|
| 1119 | |
---|
| 1120 | old_parent = rtems_rfs_rtems_get_pathloc_ino (old_parent_loc); |
---|
| 1121 | new_parent = rtems_rfs_rtems_get_pathloc_ino (new_parent_loc); |
---|
| 1122 | |
---|
| 1123 | ino = rtems_rfs_rtems_get_pathloc_ino (old_loc); |
---|
| 1124 | doff = rtems_rfs_rtems_get_pathloc_doff (old_loc); |
---|
| 1125 | |
---|
| 1126 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RENAME)) |
---|
| 1127 | printf ("rtems-rfs: rename: ino:%ld doff:%lu, new parent:%ld new name:%s\n", |
---|
| 1128 | ino, doff, new_parent, new_name); |
---|
| 1129 | |
---|
| 1130 | rtems_rfs_rtems_lock (fs); |
---|
| 1131 | |
---|
| 1132 | /* |
---|
| 1133 | * Link to the inode before unlinking so the inode is not erased when |
---|
| 1134 | * unlinked. |
---|
| 1135 | */ |
---|
| 1136 | rc = rtems_rfs_link (fs, new_name, strlen (new_name), new_parent, ino, true); |
---|
| 1137 | if (rc) |
---|
| 1138 | { |
---|
| 1139 | rtems_rfs_rtems_unlock (fs); |
---|
| 1140 | return rtems_rfs_rtems_error ("rename: linking", rc); |
---|
| 1141 | } |
---|
| 1142 | |
---|
| 1143 | /* |
---|
| 1144 | * Unlink all inodes even directories with the dir option as false because a |
---|
| 1145 | * directory may not be empty. |
---|
| 1146 | */ |
---|
| 1147 | rc = rtems_rfs_unlink (fs, old_parent, ino, doff, |
---|
| 1148 | rtems_rfs_unlink_dir_allowed); |
---|
| 1149 | if (rc) |
---|
| 1150 | { |
---|
| 1151 | rtems_rfs_rtems_unlock (fs); |
---|
| 1152 | return rtems_rfs_rtems_error ("rename: unlinking", rc); |
---|
| 1153 | } |
---|
| 1154 | |
---|
| 1155 | rtems_rfs_rtems_unlock (fs); |
---|
| 1156 | |
---|
| 1157 | return 0; |
---|
| 1158 | } |
---|
| 1159 | |
---|
[a9fa9b7] | 1160 | /** |
---|
| 1161 | * Return the file system stat data. |
---|
| 1162 | * |
---|
| 1163 | * @param pathloc |
---|
| 1164 | * @param sb |
---|
| 1165 | * @return int |
---|
| 1166 | */ |
---|
| 1167 | int |
---|
| 1168 | rtems_rfs_rtems_statvfs (rtems_filesystem_location_info_t* pathloc, |
---|
| 1169 | struct statvfs* sb) |
---|
| 1170 | { |
---|
| 1171 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
[59762963] | 1172 | size_t blocks; |
---|
| 1173 | size_t inodes; |
---|
[a9fa9b7] | 1174 | |
---|
[59762963] | 1175 | rtems_rfs_group_usage (fs, &blocks, &inodes); |
---|
| 1176 | |
---|
| 1177 | sb->f_bsize = rtems_rfs_fs_block_size (fs); |
---|
| 1178 | sb->f_frsize = rtems_rfs_fs_media_block_size (fs); |
---|
| 1179 | sb->f_blocks = rtems_rfs_fs_media_blocks (fs); |
---|
| 1180 | sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks; |
---|
| 1181 | sb->f_bavail = sb->f_bfree; |
---|
[5027104] | 1182 | sb->f_files = rtems_rfs_fs_inodes (fs); |
---|
| 1183 | sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes; |
---|
| 1184 | sb->f_favail = sb->f_ffree; |
---|
[59762963] | 1185 | sb->f_fsid = RTEMS_RFS_SB_MAGIC; |
---|
| 1186 | sb->f_flag = rtems_rfs_fs_flags (fs); |
---|
[a9fa9b7] | 1187 | sb->f_namemax = rtems_rfs_fs_max_name (fs); |
---|
| 1188 | |
---|
| 1189 | return 0; |
---|
| 1190 | } |
---|
| 1191 | |
---|
| 1192 | /** |
---|
| 1193 | * Handler table for RFS link nodes |
---|
| 1194 | */ |
---|
| 1195 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_link_handlers = |
---|
| 1196 | { |
---|
| 1197 | .open_h = NULL, |
---|
| 1198 | .close_h = NULL, |
---|
| 1199 | .read_h = NULL, |
---|
| 1200 | .write_h = NULL, |
---|
| 1201 | .ioctl_h = NULL, |
---|
| 1202 | .lseek_h = NULL, |
---|
| 1203 | .fstat_h = rtems_rfs_rtems_stat, |
---|
| 1204 | .fchmod_h = NULL, |
---|
| 1205 | .ftruncate_h = NULL, |
---|
| 1206 | .fpathconf_h = NULL, |
---|
| 1207 | .fsync_h = NULL, |
---|
| 1208 | .fdatasync_h = NULL, |
---|
| 1209 | .fcntl_h = NULL, |
---|
| 1210 | .rmnod_h = rtems_rfs_rtems_rmnod |
---|
| 1211 | }; |
---|
| 1212 | |
---|
| 1213 | /** |
---|
| 1214 | * Forward decl for the ops table. |
---|
| 1215 | */ |
---|
| 1216 | |
---|
| 1217 | int rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
| 1218 | int rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
| 1219 | |
---|
| 1220 | /** |
---|
[8ec7abb] | 1221 | * RFS file system operations table. |
---|
[a9fa9b7] | 1222 | */ |
---|
| 1223 | const rtems_filesystem_operations_table rtems_rfs_ops = |
---|
| 1224 | { |
---|
| 1225 | .evalpath_h = rtems_rfs_rtems_eval_path, |
---|
| 1226 | .evalformake_h = rtems_rfs_rtems_eval_for_make, |
---|
| 1227 | .link_h = rtems_rfs_rtems_link, |
---|
| 1228 | .unlink_h = rtems_rfs_rtems_unlink, |
---|
| 1229 | .node_type_h = rtems_rfs_rtems_node_type, |
---|
| 1230 | .mknod_h = rtems_rfs_rtems_mknod, |
---|
| 1231 | .chown_h = rtems_rfs_rtems_chown, |
---|
| 1232 | .freenod_h = rtems_rfs_rtems_freenodinfo, |
---|
| 1233 | .mount_h = NULL, |
---|
| 1234 | .fsmount_me_h = rtems_rfs_rtems_initialise, |
---|
| 1235 | .unmount_h = NULL, |
---|
| 1236 | .fsunmount_me_h = rtems_rfs_rtems_shutdown, |
---|
| 1237 | .utime_h = rtems_rfs_rtems_utime, |
---|
| 1238 | .eval_link_h = NULL, /* never called cause we lie in the node type */ |
---|
| 1239 | .symlink_h = rtems_rfs_rtems_symlink, |
---|
| 1240 | .readlink_h = rtems_rfs_rtems_readlink, |
---|
[8ec7abb] | 1241 | .rename_h = rtems_rfs_rtems_rename, |
---|
[a9fa9b7] | 1242 | .statvfs_h = rtems_rfs_rtems_statvfs |
---|
| 1243 | }; |
---|
| 1244 | |
---|
| 1245 | /** |
---|
| 1246 | * Open the file system. |
---|
| 1247 | */ |
---|
| 1248 | |
---|
| 1249 | int |
---|
| 1250 | rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
| 1251 | { |
---|
| 1252 | rtems_rfs_rtems_private* rtems; |
---|
| 1253 | rtems_rfs_file_system* fs; |
---|
| 1254 | int rc; |
---|
| 1255 | |
---|
| 1256 | rtems = malloc (sizeof (rtems_rfs_rtems_private)); |
---|
| 1257 | if (!rtems) |
---|
| 1258 | return rtems_rfs_rtems_error ("initialise: local data", ENOMEM); |
---|
| 1259 | |
---|
| 1260 | memset (rtems, 0, sizeof (rtems_rfs_rtems_private)); |
---|
| 1261 | |
---|
| 1262 | rc = rtems_rfs_mutex_create (&rtems->access); |
---|
| 1263 | if (rc > 0) |
---|
| 1264 | { |
---|
| 1265 | free (rtems); |
---|
| 1266 | return rtems_rfs_rtems_error ("initialise: cannot create mutex", rc); |
---|
| 1267 | } |
---|
| 1268 | |
---|
| 1269 | rc = rtems_rfs_mutex_lock (&rtems->access); |
---|
| 1270 | if (rc > 0) |
---|
| 1271 | { |
---|
| 1272 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
| 1273 | free (rtems); |
---|
| 1274 | return rtems_rfs_rtems_error ("initialise: cannot lock access mutex", rc); |
---|
| 1275 | } |
---|
| 1276 | |
---|
| 1277 | rc = rtems_rfs_fs_open (mt_entry->dev, rtems, 0, &fs); |
---|
| 1278 | if (rc) |
---|
| 1279 | { |
---|
| 1280 | free (rtems); |
---|
| 1281 | return rtems_rfs_rtems_error ("initialise: open", rc); |
---|
| 1282 | } |
---|
| 1283 | |
---|
| 1284 | mt_entry->fs_info = fs; |
---|
| 1285 | |
---|
| 1286 | mt_entry->mt_fs_root.node_access = (void*) RTEMS_RFS_ROOT_INO; |
---|
| 1287 | mt_entry->mt_fs_root.handlers = &rtems_rfs_rtems_dir_handlers; |
---|
| 1288 | mt_entry->mt_fs_root.ops = &rtems_rfs_ops; |
---|
| 1289 | |
---|
| 1290 | rtems_rfs_rtems_unlock (fs); |
---|
| 1291 | |
---|
| 1292 | return 0; |
---|
| 1293 | } |
---|
| 1294 | |
---|
| 1295 | /** |
---|
| 1296 | * Shutdown the file system. |
---|
| 1297 | */ |
---|
| 1298 | int |
---|
| 1299 | rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
| 1300 | { |
---|
| 1301 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
---|
| 1302 | rtems_rfs_rtems_private* rtems; |
---|
| 1303 | int rc; |
---|
| 1304 | |
---|
| 1305 | rtems = rtems_rfs_fs_user (fs); |
---|
| 1306 | |
---|
| 1307 | rc = rtems_rfs_fs_close(fs); |
---|
| 1308 | |
---|
| 1309 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
| 1310 | free (rtems); |
---|
| 1311 | |
---|
| 1312 | return rtems_rfs_rtems_error ("shutdown: close", rc); |
---|
| 1313 | } |
---|