diff options
Diffstat (limited to 'sysfs.c')
| -rw-r--r-- | sysfs.c | 58 |
1 files changed, 54 insertions, 4 deletions
@@ -74,6 +74,29 @@ void sysfs_free(struct mdinfo *sra) } } +/** + * sysfs_get_container_devnm() - extract container device name. + * @mdi: md_info describes member array, with GET_VERSION option. + * @buf: buf to fill, must be MD_NAME_MAX. + * + * External array version is in format {/,-}<container_devnm>/<array_index> + * Extract container_devnm from it and safe it in @buf. + */ +void sysfs_get_container_devnm(struct mdinfo *mdi, char *buf) +{ + char *p; + + assert(is_subarray(mdi->text_version)); + + /* Skip first special sign */ + snprintf(buf, MD_NAME_MAX, "%s", mdi->text_version + 1); + + /* Remove array index */ + p = strchr(buf, '/'); + if (p) + *p = 0; +} + int sysfs_open(char *devnm, char *devname, char *attr) { char fname[MAX_SYSFS_PATH_LEN]; @@ -655,7 +678,7 @@ int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms) return sysfs_set_str(sra, NULL, "safe_mode_delay", delay); } -int sysfs_set_array(struct mdinfo *info, int vers) +int sysfs_set_array(struct mdinfo *info) { int rv = 0; char ver[100]; @@ -679,9 +702,7 @@ int sysfs_set_array(struct mdinfo *info, int vers) if (strlen(buf) >= 9 && buf[9] == '-') ver[9] = '-'; - if ((vers % 100) < 2 || - sysfs_set_str(info, NULL, "metadata_version", - ver) < 0) { + if (sysfs_set_str(info, NULL, "metadata_version", ver) < 0) { pr_err("This kernel does not support external metadata.\n"); return 1; } @@ -1100,3 +1121,32 @@ void sysfsline(char *line) sr->next = sysfs_rules; sysfs_rules = sr; } + +/** + * sysfs_is_libata_allow_tpm_enabled() - check if libata allow_tmp is enabled. + * @verbose: verbose flag. + * + * Check if libata allow_tmp flag is set, this is required for SATA Opal Security commands to work. + * + * Return: true if allow_tpm enable, false otherwise. + */ +bool sysfs_is_libata_allow_tpm_enabled(const int verbose) +{ + const char *path = "/sys/module/libata/parameters/allow_tpm"; + const char *expected_value = "1"; + int fd = open(path, O_RDONLY); + char buf[3]; + + if (!is_fd_valid(fd)) { + pr_vrb("Failed open file descriptor to %s. Cannot check libata allow_tpm param.\n", + path); + return false; + } + + sysfs_fd_get_str(fd, buf, sizeof(buf)); + close(fd); + + if (strncmp(buf, expected_value, 1) == 0) + return true; + return false; +} |