scoutos / prex-0.9.0 / usr / server / fs / fatfs / fatfs_vnops.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005-2008, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #include <sys/prex.h> |
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31 | |||
32 | #include <sys/vnode.h> |
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33 | #include <sys/file.h> |
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34 | #include <sys/mount.h> |
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35 | #include <sys/dirent.h> |
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36 | #include <sys/buf.h> |
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37 | |||
38 | #include <ctype.h> |
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39 | #include <unistd.h> |
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40 | #include <errno.h> |
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41 | #include <string.h> |
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42 | #include <stdlib.h> |
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43 | #include <fcntl.h> |
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44 | |||
45 | #include "fatfs.h" |
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46 | |||
47 | /*
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48 | * Time bits: 15-11 hours (0-23), 10-5 min, 4-0 sec /2
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49 | * Date bits: 15-9 year - 1980, 8-5 month, 4-0 day
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50 | */
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51 | #define TEMP_DATE 0x3021 |
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52 | #define TEMP_TIME 0 |
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53 | |||
54 | #define fatfs_open ((vnop_open_t)vop_nullop)
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55 | #define fatfs_close ((vnop_close_t)vop_nullop)
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56 | static int fatfs_read (vnode_t, file_t, void *, size_t, size_t *); |
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57 | static int fatfs_write (vnode_t, file_t, void *, size_t, size_t *); |
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58 | #define fatfs_seek ((vnop_seek_t)vop_nullop)
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59 | #define fatfs_ioctl ((vnop_ioctl_t)vop_einval)
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60 | #define fatfs_fsync ((vnop_fsync_t)vop_nullop)
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61 | static int fatfs_readdir(vnode_t, file_t, struct dirent *); |
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62 | static int fatfs_lookup (vnode_t, char *, vnode_t); |
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63 | static int fatfs_create (vnode_t, char *, mode_t); |
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64 | static int fatfs_remove (vnode_t, vnode_t, char *); |
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65 | static int fatfs_rename (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); |
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66 | static int fatfs_mkdir (vnode_t, char *, mode_t); |
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67 | static int fatfs_rmdir (vnode_t, vnode_t, char *); |
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68 | static int fatfs_getattr(vnode_t, struct vattr *); |
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69 | static int fatfs_setattr(vnode_t, struct vattr *); |
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70 | static int fatfs_inactive(vnode_t); |
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71 | static int fatfs_truncate(vnode_t, off_t); |
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72 | |||
73 | /*
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74 | * vnode operations
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75 | */
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76 | struct vnops fatfs_vnops = {
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77 | fatfs_open, /* open */
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78 | fatfs_close, /* close */
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79 | fatfs_read, /* read */
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80 | fatfs_write, /* write */
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81 | fatfs_seek, /* seek */
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82 | fatfs_ioctl, /* ioctl */
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83 | fatfs_fsync, /* fsync */
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84 | fatfs_readdir, /* readdir */
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85 | fatfs_lookup, /* lookup */
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86 | fatfs_create, /* create */
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87 | fatfs_remove, /* remove */
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88 | fatfs_rename, /* remame */
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89 | fatfs_mkdir, /* mkdir */
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90 | fatfs_rmdir, /* rmdir */
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91 | fatfs_getattr, /* getattr */
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92 | fatfs_setattr, /* setattr */
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93 | fatfs_inactive, /* inactive */
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94 | fatfs_truncate, /* truncate */
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95 | }; |
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96 | |||
97 | /*
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98 | * Read one cluster to buffer.
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99 | */
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100 | static int |
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101 | fat_read_cluster(struct fatfsmount *fmp, u_long cluster)
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102 | { |
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103 | u_long sec; |
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104 | size_t size; |
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105 | |||
106 | sec = cl_to_sec(fmp, cluster); |
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107 | size = fmp->sec_per_cl * SEC_SIZE; |
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108 | return device_read(fmp->dev, fmp->io_buf, &size, sec);
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109 | } |
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110 | |||
111 | /*
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112 | * Write one cluster from buffer.
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113 | */
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114 | static int |
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115 | fat_write_cluster(struct fatfsmount *fmp, u_long cluster)
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116 | { |
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117 | u_long sec; |
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118 | size_t size; |
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119 | |||
120 | sec = cl_to_sec(fmp, cluster); |
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121 | size = fmp->sec_per_cl * SEC_SIZE; |
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122 | return device_write(fmp->dev, fmp->io_buf, &size, sec);
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123 | } |
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124 | |||
125 | /*
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126 | * Lookup vnode for the specified file/directory.
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127 | * The vnode data will be set properly.
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128 | */
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129 | static int |
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130 | fatfs_lookup(vnode_t dvp, char *name, vnode_t vp)
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131 | { |
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132 | struct fatfsmount *fmp;
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133 | struct fat_dirent *de;
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134 | struct fatfs_node *np;
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135 | int error;
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136 | |||
137 | if (*name == '\0') |
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138 | return ENOENT;
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139 | |||
140 | fmp = vp->v_mount->m_data; |
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141 | mutex_lock(&fmp->lock); |
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142 | |||
143 | DPRINTF(("fatfs_lookup: name=%s\n", name));
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144 | |||
145 | np = vp->v_data; |
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146 | error = fatfs_lookup_node(dvp, name, np); |
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147 | if (error) {
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148 | DPRINTF(("fatfs_lookup: failed!! name=%s\n", name));
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149 | mutex_unlock(&fmp->lock); |
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150 | return error;
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151 | } |
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152 | de = &np->dirent; |
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153 | vp->v_type = IS_DIR(de) ? VDIR : VREG; |
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154 | fat_attr_to_mode(de->attr, &vp->v_mode); |
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155 | vp->v_mode = ALLPERMS; |
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156 | vp->v_size = de->size; |
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157 | vp->v_blkno = de->cluster; |
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158 | |||
159 | DPRINTF(("fatfs_lookup: cl=%d\n", de->cluster));
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160 | mutex_unlock(&fmp->lock); |
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161 | return 0; |
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162 | } |
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163 | |||
164 | static int |
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165 | fatfs_read(vnode_t vp, file_t fp, void *buf, size_t size, size_t *result)
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166 | { |
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167 | struct fatfsmount *fmp;
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168 | int nr_read, nr_copy, buf_pos, error;
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169 | u_long cl, file_pos; |
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170 | |||
171 | DPRINTF(("fatfs_read: vp=%x\n", vp));
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172 | |||
173 | *result = 0;
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174 | fmp = vp->v_mount->m_data; |
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175 | |||
176 | if (vp->v_type == VDIR)
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177 | return EISDIR;
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178 | if (vp->v_type != VREG)
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179 | return EINVAL;
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180 | |||
181 | /* Check if current file position is already end of file. */
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182 | file_pos = fp->f_offset; |
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183 | if (file_pos >= vp->v_size)
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184 | return 0; |
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185 | |||
186 | mutex_lock(&fmp->lock); |
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187 | |||
188 | /* Get the actual read size. */
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189 | if (vp->v_size - file_pos < size)
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190 | size = vp->v_size - file_pos; |
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191 | |||
192 | /* Seek to the cluster for the file offset */
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193 | error = fat_seek_cluster(fmp, vp->v_blkno, file_pos, &cl); |
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194 | if (error)
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195 | goto out;
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196 | |||
197 | /* Read and copy data */
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198 | nr_read = 0;
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199 | buf_pos = file_pos % fmp->cluster_size; |
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200 | do {
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201 | if (fat_read_cluster(fmp, cl)) {
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202 | error = EIO; |
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203 | goto out;
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204 | } |
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205 | |||
206 | nr_copy = fmp->cluster_size; |
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207 | if (buf_pos > 0) |
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208 | nr_copy -= buf_pos; |
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209 | if (buf_pos + size < fmp->cluster_size)
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210 | nr_copy = size; |
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211 | memcpy(buf, fmp->io_buf + buf_pos, nr_copy); |
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212 | |||
213 | file_pos += nr_copy; |
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214 | nr_read += nr_copy; |
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215 | size -= nr_copy; |
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216 | if (size <= 0) |
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217 | break;
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218 | |||
219 | error = fat_next_cluster(fmp, cl, &cl); |
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220 | if (error)
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221 | goto out;
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222 | |||
223 | buf = (void *)((u_long)buf + nr_copy);
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224 | buf_pos = 0;
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225 | } while (!IS_EOFCL(fmp, cl));
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226 | |||
227 | fp->f_offset = file_pos; |
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228 | *result = nr_read; |
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229 | error = 0;
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230 | out:
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231 | mutex_unlock(&fmp->lock); |
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232 | return error;
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233 | } |
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234 | |||
235 | static int |
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236 | fatfs_write(vnode_t vp, file_t fp, void *buf, size_t size, size_t *result)
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237 | { |
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238 | struct fatfsmount *fmp;
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239 | struct fatfs_node *np;
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240 | struct fat_dirent *de;
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241 | int nr_copy, nr_write, buf_pos, i, cl_size, error;
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242 | u_long file_pos, end_pos; |
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243 | u_long cl; |
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244 | |||
245 | DPRINTF(("fatfs_write: vp=%x\n", vp));
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246 | |||
247 | *result = 0;
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248 | fmp = vp->v_mount->m_data; |
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249 | |||
250 | if (vp->v_type == VDIR)
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251 | return EISDIR;
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252 | if (vp->v_type != VREG)
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253 | return EINVAL;
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254 | |||
255 | mutex_lock(&fmp->lock); |
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256 | |||
257 | /* Check if file position exceeds the end of file. */
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258 | end_pos = vp->v_size; |
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259 | file_pos = (fp->f_flags & O_APPEND) ? end_pos : fp->f_offset; |
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260 | if (file_pos + size > end_pos) {
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261 | /* Expand the file size before writing to it */
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262 | end_pos = file_pos + size; |
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263 | error = fat_expand_file(fmp, vp->v_blkno, end_pos); |
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264 | if (error) {
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265 | error = EIO; |
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266 | goto out;
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267 | } |
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268 | |||
269 | /* Update directory entry */
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270 | np = vp->v_data; |
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271 | de = &np->dirent; |
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272 | de->size = end_pos; |
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273 | error = fatfs_put_node(fmp, np); |
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274 | if (error)
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275 | goto out;
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276 | vp->v_size = end_pos; |
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277 | } |
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278 | |||
279 | /* Seek to the cluster for the file offset */
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280 | error = fat_seek_cluster(fmp, vp->v_blkno, file_pos, &cl); |
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281 | if (error)
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282 | goto out;
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283 | |||
284 | buf_pos = file_pos % fmp->cluster_size; |
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285 | cl_size = size / fmp->cluster_size + 1;
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286 | nr_write = 0;
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287 | i = 0;
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288 | do {
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289 | /* First and last cluster must be read before write */
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290 | if (i == 0 || i == cl_size) { |
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291 | if (fat_read_cluster(fmp, cl)) {
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292 | error = EIO; |
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293 | goto out;
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294 | } |
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295 | } |
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296 | nr_copy = fmp->cluster_size; |
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297 | if (buf_pos > 0) |
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298 | nr_copy -= buf_pos; |
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299 | if (buf_pos + size < fmp->cluster_size)
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300 | nr_copy = size; |
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301 | memcpy(fmp->io_buf + buf_pos, buf, nr_copy); |
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302 | |||
303 | if (fat_write_cluster(fmp, cl)) {
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304 | error = EIO; |
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305 | goto out;
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306 | } |
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307 | file_pos += nr_copy; |
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308 | nr_write += nr_copy; |
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309 | size -= nr_copy; |
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310 | if (size <= 0) |
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311 | break;
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312 | |||
313 | error = fat_next_cluster(fmp, cl, &cl); |
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314 | if (error)
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315 | goto out;
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316 | |||
317 | buf = (void *)((u_long)buf + nr_copy);
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318 | buf_pos = 0;
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319 | i++; |
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320 | } while (!IS_EOFCL(fmp, cl));
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321 | |||
322 | fp->f_offset = file_pos; |
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323 | |||
324 | /*
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325 | * XXX: Todo!
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326 | * de.time = ?
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327 | * de.date = ?
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328 | * if (dirent_set(fp, &de))
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329 | * return EIO;
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330 | */
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331 | *result = nr_write; |
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332 | error = 0;
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333 | out:
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334 | mutex_unlock(&fmp->lock); |
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335 | return error;
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336 | } |
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337 | |||
338 | static int |
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339 | fatfs_readdir(vnode_t vp, file_t fp, struct dirent *dir)
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340 | { |
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341 | struct fatfsmount *fmp;
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342 | struct fatfs_node np;
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343 | struct fat_dirent *de;
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344 | int error;
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345 | |||
346 | fmp = vp->v_mount->m_data; |
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347 | mutex_lock(&fmp->lock); |
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348 | |||
349 | error = fatfs_get_node(vp, fp->f_offset, &np); |
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350 | if (error)
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351 | goto out;
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352 | de = &np.dirent; |
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353 | fat_restore_name((char *)&de->name, dir->d_name);
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354 | |||
355 | if (de->attr & FA_SUBDIR)
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356 | dir->d_type = DT_DIR; |
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357 | else if (de->attr & FA_DEVICE) |
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358 | dir->d_type = DT_BLK; |
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359 | else
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360 | dir->d_type = DT_REG; |
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361 | |||
362 | dir->d_fileno = fp->f_offset; |
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363 | dir->d_namlen = strlen(dir->d_name); |
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364 | |||
365 | fp->f_offset++; |
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366 | error = 0;
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367 | out:
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368 | mutex_unlock(&fmp->lock); |
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369 | return error;
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370 | } |
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371 | |||
372 | /*
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373 | * Create empty file.
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374 | */
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375 | static int |
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376 | fatfs_create(vnode_t dvp, char *name, mode_t mode)
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377 | { |
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378 | struct fatfsmount *fmp;
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379 | struct fatfs_node np;
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380 | struct fat_dirent *de;
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381 | u_long cl; |
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382 | int error;
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383 | |||
384 | DPRINTF(("fatfs_create: %s\n", name));
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385 | |||
386 | if (!S_ISREG(mode))
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387 | return EINVAL;
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388 | |||
389 | if (!fat_valid_name(name))
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390 | return EINVAL;
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391 | |||
392 | fmp = dvp->v_mount->m_data; |
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393 | mutex_lock(&fmp->lock); |
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394 | |||
395 | /* Allocate free cluster for new file. */
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396 | error = fat_alloc_cluster(fmp, 0, &cl);
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397 | if (error)
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398 | goto out;
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399 | |||
400 | de = &np.dirent; |
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401 | memset(de, 0, sizeof(struct fat_dirent)); |
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402 | fat_convert_name(name, (char *)de->name);
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403 | de->cluster = cl; |
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404 | de->time = TEMP_TIME; |
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405 | de->date = TEMP_DATE; |
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406 | fat_mode_to_attr(mode, &de->attr); |
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407 | error = fatfs_add_node(dvp, &np); |
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408 | if (error)
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409 | goto out;
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410 | error = fat_set_cluster(fmp, cl, fmp->fat_eof); |
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411 | out:
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412 | mutex_unlock(&fmp->lock); |
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413 | return error;
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414 | } |
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415 | |||
416 | static int |
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417 | fatfs_remove(vnode_t dvp, vnode_t vp, char *name)
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418 | { |
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419 | struct fatfsmount *fmp;
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420 | struct fatfs_node np;
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421 | struct fat_dirent *de;
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422 | int error;
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423 | |||
424 | if (*name == '\0') |
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425 | return ENOENT;
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426 | |||
427 | fmp = dvp->v_mount->m_data; |
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428 | mutex_lock(&fmp->lock); |
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429 | |||
430 | error = fatfs_lookup_node(dvp, name, &np); |
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431 | if (error)
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432 | goto out;
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433 | de = &np.dirent; |
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434 | if (IS_DIR(de)) {
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435 | error = EISDIR; |
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436 | goto out;
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437 | } |
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438 | if (!IS_FILE(de)) {
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439 | error = EPERM; |
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440 | goto out;
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441 | } |
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442 | |||
443 | /* Remove clusters */
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444 | error = fat_free_clusters(fmp, de->cluster); |
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445 | if (error)
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446 | goto out;
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447 | |||
448 | /* remove directory */
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449 | de->name[0] = 0xe5; |
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450 | error = fatfs_put_node(fmp, &np); |
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451 | out:
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452 | mutex_unlock(&fmp->lock); |
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453 | return error;
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454 | } |
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455 | |||
456 | static int |
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457 | fatfs_rename(vnode_t dvp1, vnode_t vp1, char *name1,
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458 | vnode_t dvp2, vnode_t vp2, char *name2)
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459 | { |
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460 | struct fatfsmount *fmp;
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461 | struct fatfs_node np1;
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462 | struct fat_dirent *de1, *de2;
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463 | int error;
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464 | |||
465 | fmp = dvp1->v_mount->m_data; |
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466 | mutex_lock(&fmp->lock); |
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467 | |||
468 | error = fatfs_lookup_node(dvp1, name1, &np1); |
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469 | if (error)
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470 | goto out;
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471 | de1 = &np1.dirent; |
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472 | |||
473 | if (IS_FILE(de1)) {
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474 | /* Remove destination file, first */
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475 | error = fatfs_remove(dvp2, vp1, name2); |
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476 | if (error == EIO)
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477 | goto out;
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478 | |||
479 | /* Change file name of directory entry */
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480 | fat_convert_name(name2, (char *)de1->name);
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481 | |||
482 | /* Same directory ? */
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483 | if (dvp1 == dvp2) {
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484 | /* Change the name of existing file */
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485 | error = fatfs_put_node(fmp, &np1); |
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486 | if (error)
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487 | goto out;
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488 | } else {
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489 | /* Create new directory entry */
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490 | error = fatfs_add_node(dvp2, &np1); |
||
491 | if (error)
|
||
492 | goto out;
|
||
493 | |||
494 | /* Remove souce file */
|
||
495 | error = fatfs_remove(dvp1, vp2, name1); |
||
496 | if (error)
|
||
497 | goto out;
|
||
498 | } |
||
499 | } else {
|
||
500 | |||
501 | /* remove destination directory */
|
||
502 | error = fatfs_rmdir(dvp2, NULL, name2);
|
||
503 | if (error == EIO)
|
||
504 | goto out;
|
||
505 | |||
506 | /* Change file name of directory entry */
|
||
507 | fat_convert_name(name2, (char *)de1->name);
|
||
508 | |||
509 | /* Same directory ? */
|
||
510 | if (dvp1 == dvp2) {
|
||
511 | /* Change the name of existing directory */
|
||
512 | error = fatfs_put_node(fmp, &np1); |
||
513 | if (error)
|
||
514 | goto out;
|
||
515 | } else {
|
||
516 | /* Create new directory entry */
|
||
517 | error = fatfs_add_node(dvp2, &np1); |
||
518 | if (error)
|
||
519 | goto out;
|
||
520 | |||
521 | /* Update "." and ".." for renamed directory */
|
||
522 | if (fat_read_cluster(fmp, de1->cluster)) {
|
||
523 | error = EIO; |
||
524 | goto out;
|
||
525 | } |
||
526 | |||
527 | de2 = (struct fat_dirent *)fmp->io_buf;
|
||
528 | de2->cluster = de1->cluster; |
||
529 | de2->time = TEMP_TIME; |
||
530 | de2->date = TEMP_DATE; |
||
531 | de2++; |
||
532 | de2->cluster = dvp2->v_blkno; |
||
533 | de2->time = TEMP_TIME; |
||
534 | de2->date = TEMP_DATE; |
||
535 | |||
536 | if (fat_write_cluster(fmp, de1->cluster)) {
|
||
537 | error = EIO; |
||
538 | goto out;
|
||
539 | } |
||
540 | |||
541 | /* Remove souce directory */
|
||
542 | error = fatfs_rmdir(dvp1, NULL, name1);
|
||
543 | if (error)
|
||
544 | goto out;
|
||
545 | } |
||
546 | } |
||
547 | out:
|
||
548 | mutex_unlock(&fmp->lock); |
||
549 | return error;
|
||
550 | } |
||
551 | |||
552 | static int |
||
553 | fatfs_mkdir(vnode_t dvp, char *name, mode_t mode)
|
||
554 | { |
||
555 | struct fatfsmount *fmp;
|
||
556 | struct fatfs_node np;
|
||
557 | struct fat_dirent *de;
|
||
558 | u_long cl; |
||
559 | int error;
|
||
560 | |||
561 | if (!S_ISDIR(mode))
|
||
562 | return EINVAL;
|
||
563 | |||
564 | if (!fat_valid_name(name))
|
||
565 | return ENOTDIR;
|
||
566 | |||
567 | fmp = dvp->v_mount->m_data; |
||
568 | mutex_lock(&fmp->lock); |
||
569 | |||
570 | /* Allocate free cluster for directory data */
|
||
571 | error = fat_alloc_cluster(fmp, 0, &cl);
|
||
572 | if (error)
|
||
573 | goto out;
|
||
574 | |||
575 | memset(&np, 0, sizeof(struct fatfs_node)); |
||
576 | de = &np.dirent; |
||
577 | fat_convert_name(name, (char *)&de->name);
|
||
578 | de->cluster = cl; |
||
579 | de->time = TEMP_TIME; |
||
580 | de->date = TEMP_DATE; |
||
581 | fat_mode_to_attr(mode, &de->attr); |
||
582 | error = fatfs_add_node(dvp, &np); |
||
583 | if (error)
|
||
584 | goto out;
|
||
585 | |||
586 | /* Initialize "." and ".." for new directory */
|
||
587 | memset(fmp->io_buf, 0, fmp->cluster_size);
|
||
588 | |||
589 | de = (struct fat_dirent *)fmp->io_buf;
|
||
590 | memcpy(de->name, ". ", 11); |
||
591 | de->attr = FA_SUBDIR; |
||
592 | de->cluster = cl; |
||
593 | de->time = TEMP_TIME; |
||
594 | de->date = TEMP_DATE; |
||
595 | de++; |
||
596 | memcpy(de->name, ".. ", 11); |
||
597 | de->attr = FA_SUBDIR; |
||
598 | de->cluster = dvp->v_blkno; |
||
599 | de->time = TEMP_TIME; |
||
600 | de->date = TEMP_DATE; |
||
601 | |||
602 | if (fat_write_cluster(fmp, cl)) {
|
||
603 | error = EIO; |
||
604 | goto out;
|
||
605 | } |
||
606 | /* Add eof */
|
||
607 | error = fat_set_cluster(fmp, cl, fmp->fat_eof); |
||
608 | out:
|
||
609 | mutex_unlock(&fmp->lock); |
||
610 | return error;
|
||
611 | } |
||
612 | |||
613 | /*
|
||
614 | * remove can be done only with empty directory
|
||
615 | */
|
||
616 | static int |
||
617 | fatfs_rmdir(vnode_t dvp, vnode_t vp, char *name)
|
||
618 | { |
||
619 | struct fatfsmount *fmp;
|
||
620 | struct fatfs_node np;
|
||
621 | struct fat_dirent *de;
|
||
622 | int error;
|
||
623 | |||
624 | if (*name == '\0') |
||
625 | return ENOENT;
|
||
626 | |||
627 | fmp = dvp->v_mount->m_data; |
||
628 | mutex_lock(&fmp->lock); |
||
629 | |||
630 | error = fatfs_lookup_node(dvp, name, &np); |
||
631 | if (error)
|
||
632 | goto out;
|
||
633 | |||
634 | de = &np.dirent; |
||
635 | if (!IS_DIR(de)) {
|
||
636 | error = ENOTDIR; |
||
637 | goto out;
|
||
638 | } |
||
639 | |||
640 | /* Remove clusters */
|
||
641 | error = fat_free_clusters(fmp, de->cluster); |
||
642 | if (error)
|
||
643 | goto out;
|
||
644 | |||
645 | /* remove directory */
|
||
646 | de->name[0] = 0xe5; |
||
647 | |||
648 | error = fatfs_put_node(fmp, &np); |
||
649 | out:
|
||
650 | mutex_unlock(&fmp->lock); |
||
651 | return error;
|
||
652 | } |
||
653 | |||
654 | static int |
||
655 | fatfs_getattr(vnode_t vp, struct vattr *vap)
|
||
656 | { |
||
657 | /* XXX */
|
||
658 | return 0; |
||
659 | } |
||
660 | |||
661 | static int |
||
662 | fatfs_setattr(vnode_t vp, struct vattr *vap)
|
||
663 | { |
||
664 | /* XXX */
|
||
665 | return 0; |
||
666 | } |
||
667 | |||
668 | |||
669 | static int |
||
670 | fatfs_inactive(vnode_t vp) |
||
671 | { |
||
672 | |||
673 | free(vp->v_data); |
||
674 | return 0; |
||
675 | } |
||
676 | |||
677 | static int |
||
678 | fatfs_truncate(vnode_t vp, off_t length) |
||
679 | { |
||
680 | struct fatfsmount *fmp;
|
||
681 | struct fatfs_node *np;
|
||
682 | struct fat_dirent *de;
|
||
683 | int error;
|
||
684 | |||
685 | fmp = vp->v_mount->m_data; |
||
686 | mutex_lock(&fmp->lock); |
||
687 | |||
688 | np = vp->v_data; |
||
689 | de = &np->dirent; |
||
690 | |||
691 | if (length == 0) { |
||
692 | /* Remove clusters */
|
||
693 | error = fat_free_clusters(fmp, de->cluster); |
||
694 | if (error)
|
||
695 | goto out;
|
||
696 | } else if (length > vp->v_size) { |
||
697 | error = fat_expand_file(fmp, vp->v_blkno, length); |
||
698 | if (error) {
|
||
699 | error = EIO; |
||
700 | goto out;
|
||
701 | } |
||
702 | } |
||
703 | |||
704 | /* Update directory entry */
|
||
705 | de->size = length; |
||
706 | error = fatfs_put_node(fmp, np); |
||
707 | if (error)
|
||
708 | goto out;
|
||
709 | vp->v_size = length; |
||
710 | out:
|
||
711 | mutex_unlock(&fmp->lock); |
||
712 | return error;
|
||
713 | } |
||
714 | |||
715 | int
|
||
716 | fatfs_init(void)
|
||
717 | { |
||
718 | return 0; |
||
719 | } |