diff options
Diffstat (limited to 'fs_mgr/fs_mgr.c')
| -rw-r--r-- | fs_mgr/fs_mgr.c | 380 |
1 files changed, 0 insertions, 380 deletions
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c index 24ce806..4c2f247 100644 --- a/fs_mgr/fs_mgr.c +++ b/fs_mgr/fs_mgr.c @@ -54,55 +54,6 @@ #define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a))) -struct flag_list { - const char *name; - unsigned flag; -}; - -static struct flag_list mount_flags[] = { - { "noatime", MS_NOATIME }, - { "noexec", MS_NOEXEC }, - { "nosuid", MS_NOSUID }, - { "nodev", MS_NODEV }, - { "nodiratime", MS_NODIRATIME }, - { "ro", MS_RDONLY }, - { "rw", 0 }, - { "remount", MS_REMOUNT }, - { "bind", MS_BIND }, - { "rec", MS_REC }, - { "unbindable", MS_UNBINDABLE }, - { "private", MS_PRIVATE }, - { "slave", MS_SLAVE }, - { "shared", MS_SHARED }, - { "defaults", 0 }, - { 0, 0 }, -}; - -static struct flag_list fs_mgr_flags[] = { - { "wait", MF_WAIT }, - { "check", MF_CHECK }, - { "encryptable=",MF_CRYPT }, - { "nonremovable",MF_NONREMOVABLE }, - { "voldmanaged=",MF_VOLDMANAGED}, - { "length=", MF_LENGTH }, - { "recoveryonly",MF_RECOVERYONLY }, - { "swapprio=", MF_SWAPPRIO }, - { "zramsize=", MF_ZRAMSIZE }, - { "verify", MF_VERIFY }, - { "noemulatedsd", MF_NOEMULATEDSD }, - { "defaults", 0 }, - { 0, 0 }, -}; - -struct fs_mgr_flag_values { - char *key_loc; - long long part_length; - char *label; - int partnum; - int swap_prio; - unsigned int zram_size; -}; - /* * gettime() - returns the time in seconds of the system's monotonic clock or * zero on error. @@ -133,269 +84,6 @@ static int wait_for_file(const char *filename, int timeout) return ret; } -static int parse_flags(char *flags, struct flag_list *fl, - struct fs_mgr_flag_values *flag_vals, - char *fs_options, int fs_options_len) -{ - int f = 0; - int i; - char *p; - char *savep; - - /* initialize flag values. If we find a relevant flag, we'll - * update the value */ - if (flag_vals) { - memset(flag_vals, 0, sizeof(*flag_vals)); - flag_vals->partnum = -1; - flag_vals->swap_prio = -1; /* negative means it wasn't specified. */ - } - - /* initialize fs_options to the null string */ - if (fs_options && (fs_options_len > 0)) { - fs_options[0] = '\0'; - } - - p = strtok_r(flags, ",", &savep); - while (p) { - /* Look for the flag "p" in the flag list "fl" - * If not found, the loop exits with fl[i].name being null. - */ - for (i = 0; fl[i].name; i++) { - if (!strncmp(p, fl[i].name, strlen(fl[i].name))) { - f |= fl[i].flag; - if ((fl[i].flag == MF_CRYPT) && flag_vals) { - /* The encryptable flag is followed by an = and the - * location of the keys. Get it and return it. - */ - flag_vals->key_loc = strdup(strchr(p, '=') + 1); - } else if ((fl[i].flag == MF_LENGTH) && flag_vals) { - /* The length flag is followed by an = and the - * size of the partition. Get it and return it. - */ - flag_vals->part_length = strtoll(strchr(p, '=') + 1, NULL, 0); - } else if ((fl[i].flag == MF_VOLDMANAGED) && flag_vals) { - /* The voldmanaged flag is followed by an = and the - * label, a colon and the partition number or the - * word "auto", e.g. - * voldmanaged=sdcard:3 - * Get and return them. - */ - char *label_start; - char *label_end; - char *part_start; - - label_start = strchr(p, '=') + 1; - label_end = strchr(p, ':'); - if (label_end) { - flag_vals->label = strndup(label_start, - (int) (label_end - label_start)); - part_start = strchr(p, ':') + 1; - if (!strcmp(part_start, "auto")) { - flag_vals->partnum = -1; - } else { - flag_vals->partnum = strtol(part_start, NULL, 0); - } - } else { - ERROR("Warning: voldmanaged= flag malformed\n"); - } - } else if ((fl[i].flag == MF_SWAPPRIO) && flag_vals) { - flag_vals->swap_prio = strtoll(strchr(p, '=') + 1, NULL, 0); - } else if ((fl[i].flag == MF_ZRAMSIZE) && flag_vals) { - flag_vals->zram_size = strtoll(strchr(p, '=') + 1, NULL, 0); - } - break; - } - } - - if (!fl[i].name) { - if (fs_options) { - /* It's not a known flag, so it must be a filesystem specific - * option. Add it to fs_options if it was passed in. - */ - strlcat(fs_options, p, fs_options_len); - strlcat(fs_options, ",", fs_options_len); - } else { - /* fs_options was not passed in, so if the flag is unknown - * it's an error. - */ - ERROR("Warning: unknown flag %s\n", p); - } - } - p = strtok_r(NULL, ",", &savep); - } - -out: - if (fs_options && fs_options[0]) { - /* remove the last trailing comma from the list of options */ - fs_options[strlen(fs_options) - 1] = '\0'; - } - - return f; -} - -struct fstab *fs_mgr_read_fstab(const char *fstab_path) -{ - FILE *fstab_file; - int cnt, entries; - ssize_t len; - size_t alloc_len = 0; - char *line = NULL; - const char *delim = " \t"; - char *save_ptr, *p; - struct fstab *fstab = NULL; - struct fstab_rec *recs; - struct fs_mgr_flag_values flag_vals; -#define FS_OPTIONS_LEN 1024 - char tmp_fs_options[FS_OPTIONS_LEN]; - - fstab_file = fopen(fstab_path, "r"); - if (!fstab_file) { - ERROR("Cannot open file %s\n", fstab_path); - return 0; - } - - entries = 0; - while ((len = getline(&line, &alloc_len, fstab_file)) != -1) { - /* if the last character is a newline, shorten the string by 1 byte */ - if (line[len - 1] == '\n') { - line[len - 1] = '\0'; - } - /* Skip any leading whitespace */ - p = line; - while (isspace(*p)) { - p++; - } - /* ignore comments or empty lines */ - if (*p == '#' || *p == '\0') - continue; - entries++; - } - - if (!entries) { - ERROR("No entries found in fstab\n"); - goto err; - } - - /* Allocate and init the fstab structure */ - fstab = calloc(1, sizeof(struct fstab)); - fstab->num_entries = entries; - fstab->fstab_filename = strdup(fstab_path); - fstab->recs = calloc(fstab->num_entries, sizeof(struct fstab_rec)); - - fseek(fstab_file, 0, SEEK_SET); - - cnt = 0; - while ((len = getline(&line, &alloc_len, fstab_file)) != -1) { - /* if the last character is a newline, shorten the string by 1 byte */ - if (line[len - 1] == '\n') { - line[len - 1] = '\0'; - } - - /* Skip any leading whitespace */ - p = line; - while (isspace(*p)) { - p++; - } - /* ignore comments or empty lines */ - if (*p == '#' || *p == '\0') - continue; - - /* If a non-comment entry is greater than the size we allocated, give an - * error and quit. This can happen in the unlikely case the file changes - * between the two reads. - */ - if (cnt >= entries) { - ERROR("Tried to process more entries than counted\n"); - break; - } - - if (!(p = strtok_r(line, delim, &save_ptr))) { - ERROR("Error parsing mount source\n"); - goto err; - } - fstab->recs[cnt].blk_device = strdup(p); - - if (!(p = strtok_r(NULL, delim, &save_ptr))) { - ERROR("Error parsing mount_point\n"); - goto err; - } - fstab->recs[cnt].mount_point = strdup(p); - - if (!(p = strtok_r(NULL, delim, &save_ptr))) { - ERROR("Error parsing fs_type\n"); - goto err; - } - fstab->recs[cnt].fs_type = strdup(p); - - if (!(p = strtok_r(NULL, delim, &save_ptr))) { - ERROR("Error parsing mount_flags\n"); - goto err; - } - tmp_fs_options[0] = '\0'; - fstab->recs[cnt].flags = parse_flags(p, mount_flags, NULL, - tmp_fs_options, FS_OPTIONS_LEN); - - /* fs_options are optional */ - if (tmp_fs_options[0]) { - fstab->recs[cnt].fs_options = strdup(tmp_fs_options); - } else { - fstab->recs[cnt].fs_options = NULL; - } - - if (!(p = strtok_r(NULL, delim, &save_ptr))) { - ERROR("Error parsing fs_mgr_options\n"); - goto err; - } - fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags, - &flag_vals, NULL, 0); - fstab->recs[cnt].key_loc = flag_vals.key_loc; - fstab->recs[cnt].length = flag_vals.part_length; - fstab->recs[cnt].label = flag_vals.label; - fstab->recs[cnt].partnum = flag_vals.partnum; - fstab->recs[cnt].swap_prio = flag_vals.swap_prio; - fstab->recs[cnt].zram_size = flag_vals.zram_size; - cnt++; - } - fclose(fstab_file); - free(line); - return fstab; - -err: - fclose(fstab_file); - free(line); - if (fstab) - fs_mgr_free_fstab(fstab); - return NULL; -} - -void fs_mgr_free_fstab(struct fstab *fstab) -{ - int i; - - if (!fstab) { - return; - } - - for (i = 0; i < fstab->num_entries; i++) { - /* Free the pointers return by strdup(3) */ - free(fstab->recs[i].blk_device); - free(fstab->recs[i].mount_point); - free(fstab->recs[i].fs_type); - free(fstab->recs[i].fs_options); - free(fstab->recs[i].key_loc); - free(fstab->recs[i].label); - } - - /* Free the fstab_recs array created by calloc(3) */ - free(fstab->recs); - - /* Free the fstab filename */ - free(fstab->fstab_filename); - - /* Free fstab */ - free(fstab); -} - static void check_fs(char *blk_device, char *fs_type, char *target) { int status; @@ -823,71 +511,3 @@ int fs_mgr_get_crypt_info(struct fstab *fstab, char *key_loc, char *real_blk_dev return 0; } - -/* Add an entry to the fstab, and return 0 on success or -1 on error */ -int fs_mgr_add_entry(struct fstab *fstab, - const char *mount_point, const char *fs_type, - const char *blk_device, long long length) -{ - struct fstab_rec *new_fstab_recs; - int n = fstab->num_entries; - - new_fstab_recs = (struct fstab_rec *) - realloc(fstab->recs, sizeof(struct fstab_rec) * (n + 1)); - - if (!new_fstab_recs) { - return -1; - } - - /* A new entry was added, so initialize it */ - memset(&new_fstab_recs[n], 0, sizeof(struct fstab_rec)); - new_fstab_recs[n].mount_point = strdup(mount_point); - new_fstab_recs[n].fs_type = strdup(fs_type); - new_fstab_recs[n].blk_device = strdup(blk_device); - new_fstab_recs[n].length = 0; - - /* Update the fstab struct */ - fstab->recs = new_fstab_recs; - fstab->num_entries++; - - return 0; -} - -struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path) -{ - int i; - - if (!fstab) { - return NULL; - } - - for (i = 0; i < fstab->num_entries; i++) { - int len = strlen(fstab->recs[i].mount_point); - if (strncmp(path, fstab->recs[i].mount_point, len) == 0 && - (path[len] == '\0' || path[len] == '/')) { - return &fstab->recs[i]; - } - } - - return NULL; -} - -int fs_mgr_is_voldmanaged(struct fstab_rec *fstab) -{ - return fstab->fs_mgr_flags & MF_VOLDMANAGED; -} - -int fs_mgr_is_nonremovable(struct fstab_rec *fstab) -{ - return fstab->fs_mgr_flags & MF_NONREMOVABLE; -} - -int fs_mgr_is_encryptable(struct fstab_rec *fstab) -{ - return fstab->fs_mgr_flags & MF_CRYPT; -} - -int fs_mgr_is_noemulatedsd(struct fstab_rec *fstab) -{ - return fstab->fs_mgr_flags & MF_NOEMULATEDSD; -} |