| 1 | /*
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| 2 | * Copyright (c) 2011 Maurizio Lombardi
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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 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup fs
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #include <assert.h>
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| 34 | #include <errno.h>
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| 35 | #include "mfs.h"
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| 36 | #include "mfs_utils.h"
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| 37 |
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| 38 | struct mfs_dentry_info *
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| 39 | read_directory_entry(struct mfs_node *mnode, unsigned index)
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| 40 | {
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| 41 | const struct mfs_instance *inst = mnode->instance;
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| 42 | const struct mfs_sb_info *sbi = inst->sbi;
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| 43 | const bool longnames = sbi->long_names;
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| 44 | uint32_t block;
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| 45 | block_t *b;
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| 46 |
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| 47 | struct mfs_dentry_info *d_info = malloc(sizeof *d_info);
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| 48 |
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| 49 | if (!d_info)
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| 50 | return NULL;
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| 51 |
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| 52 | int r = read_map(&block, mnode, index * sbi->dirsize);
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| 53 |
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| 54 | if (r != EOK || block == 0)
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| 55 | goto out_err;
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| 56 |
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| 57 | r = block_get(&b, inst->handle, block, BLOCK_FLAGS_NONE);
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| 58 |
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| 59 | if (r != EOK)
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| 60 | goto out_err;
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| 61 |
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| 62 | if (sbi->fs_version == MFS_VERSION_V3) {
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| 63 | struct mfs3_dentry *d3;
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| 64 |
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| 65 | d3 = b->data;
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| 66 | d3->d_inum = conv32(sbi->native, d3->d_inum);
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| 67 |
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| 68 | d_info->d_inum = d3->d_inum;
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| 69 | memcpy(d_info->d_name, d3->d_name, MFS3_MAX_NAME_LEN);
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| 70 | } else {
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| 71 | const int namelen = longnames ? MFS_L_MAX_NAME_LEN :
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| 72 | MFS_MAX_NAME_LEN;
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| 73 |
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| 74 | struct mfs_dentry *d;
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| 75 |
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| 76 | d = b->data;
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| 77 | d->d_inum = conv16(sbi->native, d->d_inum);
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| 78 |
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| 79 | d_info->d_inum = d->d_inum;
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| 80 | memcpy(d_info->d_name, d->d_name, namelen);
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| 81 | }
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| 82 |
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| 83 | block_put(b);
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| 84 |
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| 85 | d_info->dirty = false;
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| 86 | return d_info;
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| 87 |
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| 88 | out_err:
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| 89 | free(d_info);
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| 90 | return NULL;
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| 91 | }
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| 92 |
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| 93 | /**
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| 94 | * @}
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| 95 | */
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| 96 |
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