| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | file_id structure handling
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| 5 |
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| 6 | Copyright (C) Andrew Tridgell 2007
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 | #include "lib/file_id.h"
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| 24 |
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| 25 | /*
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| 26 | return True if two file_id structures are equal
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| 27 | */
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| 28 | bool file_id_equal(const struct file_id *id1, const struct file_id *id2)
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| 29 | {
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| 30 | return id1->inode == id2->inode && id1->devid == id2->devid &&
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| 31 | id1->extid == id2->extid;
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| 32 | }
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| 33 |
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| 34 | /*
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| 35 | a static-like (on talloc_tos()) string for a file_id structure
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| 36 | */
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| 37 | const char *file_id_string_tos(const struct file_id *id)
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| 38 | {
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| 39 | return file_id_string(talloc_tos(), id);
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| 40 | }
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| 41 |
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| 42 | /*
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| 43 | an allocated string for a file_id structure
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| 44 | */
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| 45 | const char *file_id_string(TALLOC_CTX *mem_ctx, const struct file_id *id)
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| 46 | {
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| 47 | char *result = talloc_asprintf(mem_ctx, "%llx:%llx:%llx",
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| 48 | (unsigned long long)id->devid,
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| 49 | (unsigned long long)id->inode,
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| 50 | (unsigned long long)id->extid);
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| 51 | SMB_ASSERT(result != NULL);
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| 52 | return result;
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| 53 | }
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| 54 |
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| 55 | /*
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| 56 | push a 16 byte version of a file id into a buffer. This ignores the extid
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| 57 | and is needed when dev/inodes are stored in persistent storage (tdbs).
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| 58 | */
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| 59 | void push_file_id_16(char *buf, const struct file_id *id)
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| 60 | {
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| 61 | SIVAL(buf, 0, id->devid&0xFFFFFFFF);
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| 62 | SIVAL(buf, 4, id->devid>>32);
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| 63 | SIVAL(buf, 8, id->inode&0xFFFFFFFF);
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| 64 | SIVAL(buf, 12, id->inode>>32);
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| 65 | }
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| 66 |
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| 67 | /*
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| 68 | push a 24 byte version of a file id into a buffer
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| 69 | */
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| 70 | void push_file_id_24(char *buf, const struct file_id *id)
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| 71 | {
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| 72 | SIVAL(buf, 0, id->devid&0xFFFFFFFF);
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| 73 | SIVAL(buf, 4, id->devid>>32);
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| 74 | SIVAL(buf, 8, id->inode&0xFFFFFFFF);
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| 75 | SIVAL(buf, 12, id->inode>>32);
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| 76 | SIVAL(buf, 16, id->extid&0xFFFFFFFF);
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| 77 | SIVAL(buf, 20, id->extid>>32);
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| 78 | }
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| 79 |
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| 80 | /*
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| 81 | pull a 24 byte version of a file id from a buffer
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| 82 | */
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| 83 | void pull_file_id_24(const char *buf, struct file_id *id)
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| 84 | {
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| 85 | ZERO_STRUCTP(id);
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| 86 | id->devid = IVAL(buf, 0);
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| 87 | id->devid |= ((uint64_t)IVAL(buf,4))<<32;
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| 88 | id->inode = IVAL(buf, 8);
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| 89 | id->inode |= ((uint64_t)IVAL(buf,12))<<32;
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| 90 | id->extid = IVAL(buf, 16);
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| 91 | id->extid |= ((uint64_t)IVAL(buf,20))<<32;
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| 92 | }
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