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Allow tune2fs to set and clear the test_fs flag on ext4 filesystems
[tools/e2fsprogs.git] / misc / tune2fs.c
index 2a8ac02..d6999e5 100644 (file)
@@ -25,7 +25,7 @@
  * 94/03/06    - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  */
 
-#define _XOPEN_SOURCE /* for inclusion of strptime() */
+#define _XOPEN_SOURCE 500 /* for inclusion of strptime() */
 #define _BSD_SOURCE /* for inclusion of strcasecmp() */
 #include <fcntl.h>
 #include <grp.h>
@@ -55,6 +55,16 @@ extern int optind;
 #include "../version.h"
 #include "nls-enable.h"
 
+/* 
+ * Tune2fs supports these features in addition to the standard features.
+ */
+#define EXT2_TUNE2FS_INCOMPAT  (EXT3_FEATURE_INCOMPAT_EXTENTS)
+#define EXT2_TUNE2FS_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
+                                EXT4_FEATURE_RO_COMPAT_GDT_CSUM|       \
+                                EXT4_FEATURE_RO_COMPAT_DIR_NLINK|      \
+                                EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)
+
+
 const char * program_name = "tune2fs";
 char * device_name;
 char * new_label, *new_last_mounted, *new_UUID;
@@ -64,12 +74,14 @@ static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
 static time_t last_check_time;
 static int print_label;
 static int max_mount_count, mount_count, mount_flags;
-static unsigned long interval, reserved_ratio, reserved_blocks;
+static unsigned long interval, reserved_blocks;
+static double reserved_ratio;
 static unsigned long resgid, resuid;
 static unsigned short errors;
 static int open_flag;
 static char *features_cmd;
 static char *mntopts_cmd;
+static char *extended_cmd;
 
 int journal_size, journal_flags;
 char *journal_device;
@@ -81,15 +93,15 @@ void do_findfs(int argc, char **argv);
 static void usage(void)
 {
        fprintf(stderr,
-               _("Usage: %s [-c max-mounts-count] [-e errors-behavior] "
+               _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
                  "[-g group]\n"
-                 "\t[-i interval[d|m|w]] [-j] [-J journal-options]\n"
-                 "\t[-l] [-s sparse-flag] [-m reserved-blocks-percent]\n"
-                 "\t[-o [^]mount-options[,...]] [-r reserved-blocks-count]\n"
-                 "\t[-u user] [-C mount-count] [-L volume-label] "
-                 "[-M last-mounted-dir]\n"
-                 "\t[-O [^]feature[,...]] [-T last-check-time] [-U UUID]"
-                 " device\n"), program_name);
+                 "\t[-i interval[d|m|w]] [-j] [-J journal_options]\n"
+                 "\t[-l] [-s sparse_flag] [-m reserved_blocks_percent]\n"
+                 "\t[-o [^]mount_options[,...]] [-r reserved_blocks_count]\n"
+                 "\t[-u user] [-C mount_count] [-L volume_label]\n"
+                 "\t[-M last_mounted_dir] [-O [^]feature[,...]]\n"
+                 "\t[-E extended-option[,...]] [-T last_check_time] "
+                 "[-U UUID] device\n"), program_name);
        exit (1);
 }
 
@@ -459,8 +471,9 @@ static void parse_e2label_options(int argc, char ** argv)
                        argv[1]);
                exit(1);
        }
+       open_flag = EXT2_FLAG_SOFTSUPP_FEATURES | EXT2_FLAG_JOURNAL_DEV_OK;
        if (argc == 3) {
-               open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
+               open_flag |= EXT2_FLAG_RW;
                L_flag = 1;
                new_label = argv[2];
        } else 
@@ -476,9 +489,9 @@ static time_t parse_time(char *str)
        }
        memset(&ts, 0, sizeof(ts));
 #ifdef HAVE_STRPTIME
-       strptime(optarg, "%Y%m%d%H%M%S", &ts);
+       strptime(str, "%Y%m%d%H%M%S", &ts);
 #else
-       sscanf(optarg, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
+       sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
               &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
        ts.tm_year -= 1900;
        ts.tm_mon -= 1;
@@ -503,8 +516,10 @@ static void parse_tune2fs_options(int argc, char **argv)
        struct group * gr;
        struct passwd * pw;
 
+       open_flag = EXT2_FLAG_SOFTSUPP_FEATURES;
+
        printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
-       while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
+       while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:E:J:L:M:O:T:U:")) != EOF)
                switch (c)
                {
                        case 'c':
@@ -547,6 +562,10 @@ static void parse_tune2fs_options(int argc, char **argv)
                                e_flag = 1;
                                open_flag = EXT2_FLAG_RW;
                                break;
+                       case 'E':
+                               extended_cmd = optarg;
+                               open_flag |= EXT2_FLAG_RW;
+                               break;
                        case 'f': /* Force */
                                f_flag = 1;
                                break;
@@ -594,7 +613,7 @@ static void parse_tune2fs_options(int argc, char **argv)
                                        tmp++;
                                        break;
                                }
-                               if (*tmp || interval > (365 * 86400)) {
+                               if (*tmp) {
                                        com_err (program_name, 0,
                                                _("bad interval - %s"), optarg);
                                        usage();
@@ -617,11 +636,11 @@ static void parse_tune2fs_options(int argc, char **argv)
                        case 'L':
                                new_label = optarg;
                                L_flag = 1;
-                               open_flag = EXT2_FLAG_RW |
+                               open_flag |= EXT2_FLAG_RW |
                                        EXT2_FLAG_JOURNAL_DEV_OK;
                                break;
                        case 'm':
-                               reserved_ratio = strtoul (optarg, &tmp, 0);
+                               reserved_ratio = strtod(optarg, &tmp);
                                if (*tmp || reserved_ratio > 50) {
                                        com_err (program_name, 0,
                                                 _("bad reserved block ratio - %s"),
@@ -738,6 +757,63 @@ void do_findfs(int argc, char **argv)
        exit(0);
 }
 
+/*
+ * Note!  If any extended options are incompatible with the
+ * intersection of the SOFTSUPP features and those features explicitly
+ * enabled for tune2fs, there needs to be an explicit test for them
+ * here.
+ */
+static void parse_extended_opts(ext2_filsys fs, const char *opts)
+{
+       char    *buf, *token, *next, *p, *arg;
+       int     len;
+       int     r_usage = 0;
+
+       len = strlen(opts);
+       buf = malloc(len+1);
+       if (!buf) {
+               fprintf(stderr,
+                       _("Couldn't allocate memory to parse options!\n"));
+               exit(1);
+       }
+       strcpy(buf, opts);
+       for (token = buf; token && *token; token = next) {
+               p = strchr(token, ',');
+               next = 0;
+               if (p) {
+                       *p = 0;
+                       next = p+1;
+               }
+               arg = strchr(token, '=');
+               if (arg) {
+                       *arg = 0;
+                       arg++;
+               }
+               if (!strcmp(token, "test_fs")) {
+                       fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
+                       printf("Setting test filesystem flag\n");
+                       ext2fs_mark_super_dirty(fs);
+               } else if (!strcmp(token, "^test_fs")) {
+                       fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
+                       printf("Clearing test filesystem flag\n");
+                       ext2fs_mark_super_dirty(fs);
+               } else
+                       r_usage++;
+       }
+       if (r_usage) {
+               fprintf(stderr, _("\nBad options specified.\n\n"
+                       "Extended options are separated by commas, "
+                       "and may take an argument which\n"
+                       "\tis set off by an equals ('=') sign.\n\n"
+                       "Valid extended options are:\n"
+                       "\ttest_fs\n"
+                       "\t^test_fs\n"));
+               free(buf);
+               exit(1);
+       }
+       free(buf);
+}      
+
 
 int main (int argc, char ** argv)
 {
@@ -754,7 +830,7 @@ int main (int argc, char ** argv)
 #endif
        if (argc && *argv)
                program_name = *argv;
-       initialize_ext2_error_table();
+       add_error_table(&et_ext2_error_table);
 
        if (strcmp(get_progname(argv[0]), "findfs") == 0)
                do_findfs(argc, argv);
@@ -779,10 +855,19 @@ int main (int argc, char ** argv)
                exit(1);
        }
        sb = fs->super;
+       fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
+       if ((sb->s_feature_incompat & !EXT2_TUNE2FS_INCOMPAT) ||
+           (sb->s_feature_ro_compat & !EXT2_TUNE2FS_RO_COMPAT)) {
+               fprintf(stderr, 
+                       _("Filesystem %s has unsupported features enabled.\n"),
+                       device_name);
+               exit(1);
+       }
        if (print_label) {
                /* For e2label emulation */
                printf("%.*s\n", (int) sizeof(sb->s_volume_name),
                       sb->s_volume_name);
+               remove_error_table(&et_ext2_error_table);
                exit(0);
        }
        retval = ext2fs_check_if_mounted(device_name, &mount_flags);
@@ -819,17 +904,17 @@ int main (int argc, char ** argv)
        if (i_flag) {
                sb->s_checkinterval = interval;
                ext2fs_mark_super_dirty(fs);
-               printf (_("Setting interval between check %lu seconds\n"), interval);
+               printf (_("Setting interval between checks to %lu seconds\n"), interval);
        }
        if (m_flag) {
-               sb->s_r_blocks_count = (sb->s_blocks_count / 100)
-                       * reserved_ratio;
+               sb->s_r_blocks_count = e2p_percent(reserved_ratio,
+                                                  sb->s_blocks_count);
                ext2fs_mark_super_dirty(fs);
-               printf (_("Setting reserved blocks percentage to %lu (%u blocks)\n"),
+               printf (_("Setting reserved blocks percentage to %g%% (%u blocks)\n"),
                        reserved_ratio, sb->s_r_blocks_count);
        }
        if (r_flag) {
-               if (reserved_blocks >= sb->s_blocks_count) {
+               if (reserved_blocks >= sb->s_blocks_count/2) {
                        com_err (program_name, 0,
                                 _("reserved blocks count is too big (%lu)"),
                                 reserved_blocks);
@@ -899,6 +984,8 @@ int main (int argc, char ** argv)
                update_mntopts(fs, mntopts_cmd);
        if (features_cmd)
                update_feature_set(fs, features_cmd);
+       if (extended_cmd)
+               parse_extended_opts(fs, extended_cmd);
        if (journal_size || journal_device)
                add_journal(fs);
        
@@ -919,5 +1006,6 @@ int main (int argc, char ** argv)
 
        if (l_flag)
                list_super (sb);
+       remove_error_table(&et_ext2_error_table);
        return (ext2fs_close (fs) ? 1 : 0);
 }