#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
-#include <ctype.h>
#include <math.h>
#include <sys/stat.h>
#include <sys/mnttab.h>
#include "zfs_prop.h"
#include "zfeature_common.h"
#include <zfs_fletcher.h>
+#include <libzutil.h>
int
libzfs_errno(libzfs_handle_t *hdl)
return (ret);
}
-/*
- * Convert a number to an appropriately human-readable output.
- */
-void
-zfs_nicenum_format(uint64_t num, char *buf, size_t buflen,
- enum zfs_nicenum_format format)
-{
- uint64_t n = num;
- int index = 0;
- const char *u;
- const char *units[3][7] = {
- [ZFS_NICENUM_1024] = {"", "K", "M", "G", "T", "P", "E"},
- [ZFS_NICENUM_BYTES] = {"B", "K", "M", "G", "T", "P", "E"},
- [ZFS_NICENUM_TIME] = {"ns", "us", "ms", "s", "?", "?", "?"}
- };
-
- const int units_len[] = {[ZFS_NICENUM_1024] = 6,
- [ZFS_NICENUM_BYTES] = 6,
- [ZFS_NICENUM_TIME] = 4};
-
- const int k_unit[] = { [ZFS_NICENUM_1024] = 1024,
- [ZFS_NICENUM_BYTES] = 1024,
- [ZFS_NICENUM_TIME] = 1000};
-
- double val;
-
- if (format == ZFS_NICENUM_RAW) {
- snprintf(buf, buflen, "%llu", (u_longlong_t)num);
- return;
- } else if (format == ZFS_NICENUM_RAWTIME && num > 0) {
- snprintf(buf, buflen, "%llu", (u_longlong_t)num);
- return;
- } else if (format == ZFS_NICENUM_RAWTIME && num == 0) {
- snprintf(buf, buflen, "%s", "-");
- return;
- }
-
- while (n >= k_unit[format] && index < units_len[format]) {
- n /= k_unit[format];
- index++;
- }
-
- u = units[format][index];
-
- /* Don't print zero latencies since they're invalid */
- if ((format == ZFS_NICENUM_TIME) && (num == 0)) {
- (void) snprintf(buf, buflen, "-");
- } else if ((index == 0) || ((num %
- (uint64_t)powl(k_unit[format], index)) == 0)) {
- /*
- * If this is an even multiple of the base, always display
- * without any decimal precision.
- */
- (void) snprintf(buf, buflen, "%llu%s", (u_longlong_t)n, u);
-
- } else {
- /*
- * We want to choose a precision that reflects the best choice
- * for fitting in 5 characters. This can get rather tricky when
- * we have numbers that are very close to an order of magnitude.
- * For example, when displaying 10239 (which is really 9.999K),
- * we want only a single place of precision for 10.0K. We could
- * develop some complex heuristics for this, but it's much
- * easier just to try each combination in turn.
- */
- int i;
- for (i = 2; i >= 0; i--) {
- val = (double)num /
- (uint64_t)powl(k_unit[format], index);
-
- /*
- * Don't print floating point values for time. Note,
- * we use floor() instead of round() here, since
- * round can result in undesirable results. For
- * example, if "num" is in the range of
- * 999500-999999, it will print out "1000us". This
- * doesn't happen if we use floor().
- */
- if (format == ZFS_NICENUM_TIME) {
- if (snprintf(buf, buflen, "%d%s",
- (unsigned int) floor(val), u) <= 5)
- break;
-
- } else {
- if (snprintf(buf, buflen, "%.*f%s", i,
- val, u) <= 5)
- break;
- }
- }
- }
-}
-
-/*
- * Convert a number to an appropriately human-readable output.
- */
-void
-zfs_nicenum(uint64_t num, char *buf, size_t buflen)
-{
- zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_1024);
-}
-
-/*
- * Convert a time to an appropriately human-readable output.
- * @num: Time in nanoseconds
- */
-void
-zfs_nicetime(uint64_t num, char *buf, size_t buflen)
-{
- zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_TIME);
-}
-
-/*
- * Print out a raw number with correct column spacing
- */
-void
-zfs_niceraw(uint64_t num, char *buf, size_t buflen)
-{
- zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_RAW);
-}
-
-/*
- * Convert a number of bytes to an appropriately human-readable output.
- */
-void
-zfs_nicebytes(uint64_t num, char *buf, size_t buflen)
-{
- zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_BYTES);
-}
-
void
libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr)
{
return (zfs_open(hdl, entry.mnt_special, ZFS_TYPE_FILESYSTEM));
}
-/*
- * Append partition suffix to an otherwise fully qualified device path.
- * This is used to generate the name the full path as its stored in
- * ZPOOL_CONFIG_PATH for whole disk devices. On success the new length
- * of 'path' will be returned on error a negative value is returned.
- */
-int
-zfs_append_partition(char *path, size_t max_len)
-{
- int len = strlen(path);
-
- if ((strncmp(path, UDISK_ROOT, strlen(UDISK_ROOT)) == 0) ||
- (strncmp(path, ZVOL_ROOT, strlen(ZVOL_ROOT)) == 0)) {
- if (len + 6 >= max_len)
- return (-1);
-
- (void) strcat(path, "-part1");
- len += 6;
- } else {
- if (len + 2 >= max_len)
- return (-1);
-
- if (isdigit(path[len-1])) {
- (void) strcat(path, "p1");
- len += 2;
- } else {
- (void) strcat(path, "1");
- len += 1;
- }
- }
-
- return (len);
-}
-
-/*
- * Given a shorthand device name check if a file by that name exists in any
- * of the 'zpool_default_import_path' or ZPOOL_IMPORT_PATH directories. If
- * one is found, store its fully qualified path in the 'path' buffer passed
- * by the caller and return 0, otherwise return an error.
- */
-int
-zfs_resolve_shortname(const char *name, char *path, size_t len)
-{
- int i, error = -1;
- char *dir, *env, *envdup;
-
- env = getenv("ZPOOL_IMPORT_PATH");
- errno = ENOENT;
-
- if (env) {
- envdup = strdup(env);
- dir = strtok(envdup, ":");
- while (dir && error) {
- (void) snprintf(path, len, "%s/%s", dir, name);
- error = access(path, F_OK);
- dir = strtok(NULL, ":");
- }
- free(envdup);
- } else {
- for (i = 0; i < DEFAULT_IMPORT_PATH_SIZE && error < 0; i++) {
- (void) snprintf(path, len, "%s/%s",
- zpool_default_import_path[i], name);
- error = access(path, F_OK);
- }
- }
-
- return (error ? ENOENT : 0);
-}
-
-/*
- * Given a shorthand device name look for a match against 'cmp_name'. This
- * is done by checking all prefix expansions using either the default
- * 'zpool_default_import_paths' or the ZPOOL_IMPORT_PATH environment
- * variable. Proper partition suffixes will be appended if this is a
- * whole disk. When a match is found 0 is returned otherwise ENOENT.
- */
-static int
-zfs_strcmp_shortname(char *name, char *cmp_name, int wholedisk)
-{
- int path_len, cmp_len, i = 0, error = ENOENT;
- char *dir, *env, *envdup = NULL;
- char path_name[MAXPATHLEN];
-
- cmp_len = strlen(cmp_name);
- env = getenv("ZPOOL_IMPORT_PATH");
-
- if (env) {
- envdup = strdup(env);
- dir = strtok(envdup, ":");
- } else {
- dir = zpool_default_import_path[i];
- }
-
- while (dir) {
- /* Trim trailing directory slashes from ZPOOL_IMPORT_PATH */
- while (dir[strlen(dir)-1] == '/')
- dir[strlen(dir)-1] = '\0';
-
- path_len = snprintf(path_name, MAXPATHLEN, "%s/%s", dir, name);
- if (wholedisk)
- path_len = zfs_append_partition(path_name, MAXPATHLEN);
-
- if ((path_len == cmp_len) && strcmp(path_name, cmp_name) == 0) {
- error = 0;
- break;
- }
-
- if (env) {
- dir = strtok(NULL, ":");
- } else if (++i < DEFAULT_IMPORT_PATH_SIZE) {
- dir = zpool_default_import_path[i];
- } else {
- dir = NULL;
- }
- }
-
- if (env)
- free(envdup);
-
- return (error);
-}
-
-/*
- * Given either a shorthand or fully qualified path name look for a match
- * against 'cmp'. The passed name will be expanded as needed for comparison
- * purposes and redundant slashes stripped to ensure an accurate match.
- */
-int
-zfs_strcmp_pathname(char *name, char *cmp, int wholedisk)
-{
- int path_len, cmp_len;
- char path_name[MAXPATHLEN];
- char cmp_name[MAXPATHLEN];
- char *dir, *dup;
-
- /* Strip redundant slashes if one exists due to ZPOOL_IMPORT_PATH */
- memset(cmp_name, 0, MAXPATHLEN);
- dup = strdup(cmp);
- dir = strtok(dup, "/");
- while (dir) {
- strlcat(cmp_name, "/", sizeof (cmp_name));
- strlcat(cmp_name, dir, sizeof (cmp_name));
- dir = strtok(NULL, "/");
- }
- free(dup);
-
- if (name[0] != '/')
- return (zfs_strcmp_shortname(name, cmp_name, wholedisk));
-
- (void) strlcpy(path_name, name, MAXPATHLEN);
- path_len = strlen(path_name);
- cmp_len = strlen(cmp_name);
-
- if (wholedisk) {
- path_len = zfs_append_partition(path_name, MAXPATHLEN);
- if (path_len == -1)
- return (ENOMEM);
- }
-
- if ((path_len != cmp_len) || strcmp(path_name, cmp_name))
- return (ENOENT);
-
- return (0);
-}
-
-/*
- * Given a full path to a device determine if that device appears in the
- * import search path. If it does return the first match and store the
- * index in the passed 'order' variable, otherwise return an error.
- */
-int
-zfs_path_order(char *name, int *order)
-{
- int i = 0, error = ENOENT;
- char *dir, *env, *envdup;
-
- env = getenv("ZPOOL_IMPORT_PATH");
- if (env) {
- envdup = strdup(env);
- dir = strtok(envdup, ":");
- while (dir) {
- if (strncmp(name, dir, strlen(dir)) == 0) {
- *order = i;
- error = 0;
- break;
- }
- dir = strtok(NULL, ":");
- i++;
- }
- free(envdup);
- } else {
- for (i = 0; i < DEFAULT_IMPORT_PATH_SIZE; i++) {
- if (strncmp(name, zpool_default_import_path[i],
- strlen(zpool_default_import_path[i])) == 0) {
- *order = i;
- error = 0;
- break;
- }
- }
- }
-
- return (error);
-}
-
/*
* Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from
* an ioctl().
projects / mirror_zfs.git / blobdiff