projects / thirdparty / xfsprogs-dev.git / blame
| Commit | Line | Data |
|---|---|---|
| a278c389 DC |
1 | /* |
| 2 | * Copyright (c) 2012 Red Hat, Inc. | |
| 3 | * All Rights Reserved. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it would be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write the Free Software Foundation, | |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | */ | |
| 18 | ||
| 6b803e5a CH |
19 | #include "command.h" |
| 20 | #include "input.h" | |
| a278c389 DC |
21 | #include "init.h" |
| 22 | #include "io.h" | |
| 23 | ||
| 24 | static cmdinfo_t sync_range_cmd; | |
| 25 | ||
| 26 | static void | |
| 27 | sync_range_help(void) | |
| 28 | { | |
| 29 | printf(_( | |
| 30 | "\n" | |
| 31 | " Trigger specific writeback commands on a range of the current file\n" | |
| 32 | "\n" | |
| 33 | " With no options, the SYNC_FILE_RANGE_WRITE is implied.\n" | |
| 34 | " -a -- wait for IO to finish after writing (SYNC_FILE_RANGE_WAIT_AFTER).\n" | |
| 35 | " -b -- wait for IO to finish before writing (SYNC_FILE_RANGE_WAIT_BEFORE).\n" | |
| 36 | " -w -- write dirty data in range (SYNC_FILE_RANGE_WRITE).\n" | |
| 37 | "\n")); | |
| 38 | } | |
| 39 | ||
| 40 | static int | |
| 41 | sync_range_f( | |
| 42 | int argc, | |
| 43 | char **argv) | |
| 44 | { | |
| 45 | off64_t offset = 0, length = 0; | |
| 46 | int c, sync_mode = 0; | |
| 47 | size_t blocksize, sectsize; | |
| 48 | ||
| 49 | while ((c = getopt(argc, argv, "abw")) != EOF) { | |
| 50 | switch (c) { | |
| 51 | case 'a': | |
| 52 | sync_mode = SYNC_FILE_RANGE_WAIT_AFTER; | |
| 53 | break; | |
| 54 | case 'b': | |
| 55 | sync_mode = SYNC_FILE_RANGE_WAIT_BEFORE; | |
| 56 | break; | |
| 57 | case 'w': | |
| 58 | sync_mode = SYNC_FILE_RANGE_WRITE; | |
| 59 | break; | |
| 60 | default: | |
| 61 | return command_usage(&sync_range_cmd); | |
| 62 | } | |
| 63 | } | |
| 64 | ||
| 65 | /* default to just starting writeback on the range */ | |
| 66 | if (!sync_mode) | |
| 67 | sync_mode = SYNC_FILE_RANGE_WRITE; | |
| 68 | ||
| 69 | if (optind != argc - 2) | |
| 70 | return command_usage(&sync_range_cmd); | |
| 71 | init_cvtnum(&blocksize, §size); | |
| 72 | offset = cvtnum(blocksize, sectsize, argv[optind]); | |
| 73 | if (offset < 0) { | |
| 74 | printf(_("non-numeric offset argument -- %s\n"), | |
| 75 | argv[optind]); | |
| 76 | return 0; | |
| 77 | } | |
| 78 | optind++; | |
| 79 | length = cvtnum(blocksize, sectsize, argv[optind]); | |
| 80 | if (length < 0) { | |
| 81 | printf(_("non-numeric length argument -- %s\n"), | |
| 82 | argv[optind]); | |
| 83 | return 0; | |
| 84 | } | |
| 85 | ||
| 86 | if (sync_file_range(file->fd, offset, length, sync_mode) < 0) { | |
| 87 | perror("sync_file_range"); | |
| 88 | return 0; | |
| 89 | } | |
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | void | |
| 94 | sync_range_init(void) | |
| 95 | { | |
| 96 | sync_range_cmd.name = "sync_range"; | |
| 97 | sync_range_cmd.cfunc = sync_range_f; | |
| 98 | sync_range_cmd.argmin = 2; | |
| 99 | sync_range_cmd.argmax = -1; | |
| 100 | sync_range_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK; | |
| 101 | sync_range_cmd.args = _("[-abw] off len"); | |
| 102 | sync_range_cmd.oneline = _("Control writeback on a range of a file"); | |
| 103 | sync_range_cmd.help = sync_range_help; | |
| 104 | ||
| 105 | add_command(&sync_range_cmd); | |
| 106 | } |