| 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 |
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| 24 | /*
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| 25 | return a file_id which gives a unique ID for a file given the device and
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| 26 | inode numbers
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| 27 | */
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| 28 | struct file_id file_id_create_dev(SMB_DEV_T dev, SMB_INO_T inode)
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| 29 | {
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| 30 | struct file_id key;
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| 31 | /* the ZERO_STRUCT ensures padding doesn't break using the key as a
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| 32 | * blob */
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| 33 | ZERO_STRUCT(key);
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| 34 | key.devid = dev;
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| 35 | key.inode = inode;
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| 36 | return key;
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| 37 | }
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| 38 |
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| 39 | /*
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| 40 | generate a file_id from a stat structure
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| 41 | */
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| 42 | struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf)
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| 43 | {
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| 44 | return SMB_VFS_FILE_ID_CREATE(conn, sbuf->st_dev, sbuf->st_ino);
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| 45 | }
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| 46 |
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| 47 | /*
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| 48 | return True if two file_id structures are equal
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| 49 | */
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| 50 | bool file_id_equal(const struct file_id *id1, const struct file_id *id2)
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| 51 | {
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| 52 | return id1->inode == id2->inode && id1->devid == id2->devid;
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| 53 | }
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| 54 |
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| 55 | /*
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| 56 | a static string for a file_id structure
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| 57 | */
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| 58 | const char *file_id_string_tos(const struct file_id *id)
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| 59 | {
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| 60 | char *result = talloc_asprintf(talloc_tos(), "%llx:%llx",
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| 61 | (unsigned long long)id->devid,
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| 62 | (unsigned long long)id->inode);
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| 63 | SMB_ASSERT(result != NULL);
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| 64 | return result;
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| 65 | }
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| 66 |
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| 67 | /*
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| 68 | push a 16 byte version of a file id into a buffer
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| 69 | */
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| 70 | void push_file_id_16(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 | }
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| 77 |
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| 78 | /*
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| 79 | pul a 16 byte version of a file id from a buffer
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| 80 | */
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| 81 | void pull_file_id_16(char *buf, struct file_id *id)
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| 82 | {
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| 83 | ZERO_STRUCTP(id);
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| 84 | id->devid = IVAL(buf, 0);
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| 85 | id->devid |= ((uint64_t)IVAL(buf,4))<<32;
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| 86 | id->inode = IVAL(buf, 8);
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| 87 | id->inode |= ((uint64_t)IVAL(buf,12))<<32;
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| 88 | }
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