*/
#include "mdadm.h"
+#include "dlink.h"
#include <ctype.h>
/* This fill contains various 'library' style function. They
int get_mdp_major(void)
{
-static int mdp_major = -1;
+ static int mdp_major = -1;
FILE *fl;
char *w;
int have_block = 0;
if (mdp_major != -1)
return mdp_major;
+
fl = fopen("/proc/devices", "r");
if (!fl)
return -1;
+
while ((w = conf_word(fl, 1))) {
- if (have_block && strcmp(w, "devices:")==0)
+ if (have_block && strcmp(w, "devices:") == 0)
have_devices = 1;
- have_block = (strcmp(w, "Block")==0);
+ have_block = (strcmp(w, "Block") == 0);
if (isdigit(w[0]))
last_num = atoi(w);
- if (have_devices && strcmp(w, "mdp")==0)
+ if (have_devices && strcmp(w, "mdp") == 0)
mdp_major = last_num;
free(w);
}
fclose(fl);
+
return mdp_major;
}
-
-void fmt_devname(char *name, int num)
+char *devid2kname(dev_t devid)
{
- if (num >= 0)
- sprintf(name, "md%d", num);
- else
- sprintf(name, "md_d%d", -1-num);
+ char path[30];
+ char link[PATH_MAX];
+ static char devnm[32];
+ char *cp;
+ int n;
+
+ /* Look at the
+ * /sys/dev/block/%d:%d link which must look like
+ * and take the last component.
+ */
+ sprintf(path, "/sys/dev/block/%d:%d", major(devid), minor(devid));
+ n = readlink(path, link, sizeof(link) - 1);
+ if (n > 0) {
+ link[n] = 0;
+ cp = strrchr(link, '/');
+ if (cp) {
+ strcpy(devnm, cp + 1);
+ return devnm;
+ }
+ }
+ return NULL;
}
-char *devnum2devname(int num)
+char *stat2kname(struct stat *st)
{
- char name[100];
- fmt_devname(name,num);
- return xstrdup(name);
+ if ((S_IFMT & st->st_mode) != S_IFBLK)
+ return NULL;
+
+ return devid2kname(st->st_rdev);
}
-int devname2devnum(char *name)
+char *fd2kname(int fd)
{
- char *ep;
- int num;
- if (strncmp(name, "md_d", 4)==0)
- num = -1-strtoul(name+4, &ep, 10);
- else
- num = strtoul(name+2, &ep, 10);
- return num;
+ struct stat stb;
+
+ if (fstat(fd, &stb) == 0)
+ return stat2kname(&stb);
+
+ return NULL;
}
-int stat2devnum(struct stat *st)
+char *devid2devnm(dev_t devid)
{
char path[30];
char link[200];
- char *cp;
+ static char devnm[32];
+ char *cp, *ep;
int n;
- if ((S_IFMT & st->st_mode) == S_IFBLK) {
- if (major(st->st_rdev) == MD_MAJOR)
- return minor(st->st_rdev);
- else if (major(st->st_rdev) == (unsigned)get_mdp_major())
- return -1- (minor(st->st_rdev)>>MdpMinorShift);
-
- /* must be an extended-minor partition. Look at the
- * /sys/dev/block/%d:%d link which must look like
- * ../../block/mdXXX/mdXXXpYY
- */
- sprintf(path, "/sys/dev/block/%d:%d", major(st->st_rdev),
- minor(st->st_rdev));
- n = readlink(path, link, sizeof(link)-1);
- if (n <= 0)
- return NoMdDev;
+ /* Might be an extended-minor partition or a
+ * named md device. Look at the
+ * /sys/dev/block/%d:%d link which must look like
+ * ../../block/mdXXX/mdXXXpYY
+ * or
+ * ...../block/md_FOO
+ */
+ sprintf(path, "/sys/dev/block/%d:%d", major(devid), minor(devid));
+ n = readlink(path, link, sizeof(link) - 1);
+ if (n > 0) {
link[n] = 0;
- cp = strrchr(link, '/');
- if (cp) *cp = 0;
- cp = strrchr(link, '/');
- if (cp && strncmp(cp, "/md", 3) == 0)
- return devname2devnum(cp+1);
+ cp = strstr(link, "/block/");
+ if (cp) {
+ cp += 7;
+ ep = strchr(cp, '/');
+ if (ep)
+ *ep = 0;
+ strcpy(devnm, cp);
+ return devnm;
+ }
}
- return NoMdDev;
+ if (major(devid) == MD_MAJOR)
+ sprintf(devnm,"md%d", minor(devid));
+ else if (major(devid) == (unsigned)get_mdp_major())
+ sprintf(devnm,"md_d%d",
+ (minor(devid)>>MdpMinorShift));
+ else
+ return NULL;
+ return devnm;
}
-int fd2devnum(int fd)
+char *stat2devnm(struct stat *st)
+{
+ if ((S_IFMT & st->st_mode) != S_IFBLK)
+ return NULL;
+
+ return devid2devnm(st->st_rdev);
+}
+
+char *fd2devnm(int fd)
{
struct stat stb;
+
if (fstat(fd, &stb) == 0)
- return stat2devnum(&stb);
- return NoMdDev;
+ return stat2devnm(&stb);
+
+ return NULL;
}
+/* When we create a new array, we don't want the content to
+ * be immediately examined by udev - it is probably meaningless.
+ * So create /run/mdadm/creating-mdXXX and expect that a udev
+ * rule will noticed this and act accordingly.
+ */
+static char block_path[] = "/run/mdadm/creating-%s";
+static char *unblock_path = NULL;
+void udev_block(char *devnm)
+{
+ int fd;
+ char *path = NULL;
+
+ xasprintf(&path, block_path, devnm);
+ fd = open(path, O_CREAT|O_RDWR, 0600);
+ if (fd >= 0) {
+ close(fd);
+ unblock_path = path;
+ } else
+ free(path);
+}
+void udev_unblock(void)
+{
+ if (unblock_path)
+ unlink(unblock_path);
+ free(unblock_path);
+ unblock_path = NULL;
+}
/*
* convert a major/minor pair for a block device into a name in /dev, if possible.
if ((stb->st_mode&S_IFMT)== S_IFBLK) {
char *n = xstrdup(name);
struct devmap *dm = xmalloc(sizeof(*dm));
- if (strncmp(n, "/dev/./", 7)==0)
- strcpy(n+4, name+6);
+ if (strncmp(n, "/dev/./", 7) == 0)
+ strcpy(n + 4, name + 6);
if (dm) {
dm->major = major(stb->st_rdev);
dm->minor = minor(stb->st_rdev);
devlist = dm;
}
}
+
return 0;
}
{
return add_dev(name, stb, flag, NULL);
}
-int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags)
+int nftw(const char *path,
+ int (*han)(const char *name, const struct stat *stb,
+ int flag, struct FTW *s), int nopenfd, int flags)
{
return ftw(path, add_dev_1, nopenfd);
}
#else
-int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags)
+int nftw(const char *path,
+ int (*han)(const char *name, const struct stat *stb,
+ int flag, struct FTW *s), int nopenfd, int flags)
{
return 0;
}
int did_check = 0;
if (major == 0 && minor == 0)
- return NULL;
+ return NULL;
retry:
if (!devlist_ready) {
free(d->name);
free(d);
}
- if (lstat(dev, &stb)==0 &&
- S_ISLNK(stb.st_mode))
+ if (lstat(dev, &stb) == 0 && S_ISLNK(stb.st_mode))
dev = "/dev/.";
nftw(dev, add_dev, 10, FTW_PHYS);
devlist_ready=1;
did_check = 1;
}
- for (p=devlist; p; p=p->next)
- if (p->major == major &&
- p->minor == minor) {
- if (strncmp(p->name, "/dev/md/",8) == 0
- || (prefer && strstr(p->name, prefer))) {
+ for (p = devlist; p; p = p->next)
+ if (p->major == major && p->minor == minor) {
+ if (strncmp(p->name, "/dev/md/",8) == 0 ||
+ (prefer && strstr(p->name, prefer))) {
if (preferred == NULL ||
strlen(p->name) < strlen(preferred))
preferred = p->name;
return preferred ? preferred : regular;
}
-
-
/* conf_word gets one word from the conf file.
* if "allow_key", then accept words at the start of a line,
* otherwise stop when such a word is found.
int wordfound = 0;
char *word = xmalloc(wsize);
- while (wordfound==0) {
+ while (wordfound == 0) {
/* at the end of a word.. */
c = getc(file);
if (c == '#')
while (c != EOF && c != '\n')
c = getc(file);
- if (c == EOF) break;
- if (c == '\n') continue;
+ if (c == EOF)
+ break;
+ if (c == '\n')
+ continue;
if (c != ' ' && c != '\t' && ! allow_key) {
ungetc(c, file);
c = getc(file);
if (c != EOF && c != '\n' && c != '#') {
/* we really have a character of a word, so start saving it */
- while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
+ while (c != EOF && c != '\n' &&
+ (quote || (c != ' ' && c != '\t'))) {
wordfound = 1;
- if (quote && c == quote) quote = 0;
+ if (quote && c == quote)
+ quote = 0;
else if (quote == 0 && (c == '\'' || c == '"'))
quote = c;
else {
* in /proc/mdstat instead of
* "active (auto-read-only)"
*/
- if (c == '(' && len >= 6
- && strncmp(word+len-6, "active", 6) == 0)
+ if (c == '(' && len >= 6 &&
+ strncmp(word + len - 6, "active", 6) == 0)
c = ' ';
}
}
- if (c != EOF) ungetc(c, file);
+ if (c != EOF)
+ ungetc(c, file);
}
word[len] = 0;
/* print str, but change space and tab to '_'
* as is suitable for device names
*/
- for (; *str ; str++) {
+ for (; *str; str++) {
switch (*str) {
case ' ':
case '\t':
}
}
}
+
+int check_env(char *name)
+{
+ char *val = getenv(name);
+
+ if (val && atoi(val) == 1)
+ return 1;
+
+ return 0;
+}
+
+int use_udev(void)
+{
+ static int use = -1;
+ struct stat stb;
+
+ if (use < 0) {
+ use = ((stat("/dev/.udev", &stb) == 0 ||
+ stat("/run/udev", &stb) == 0) &&
+ check_env("MDADM_NO_UDEV") == 0);
+ }
+ return use;
+}
+
+unsigned long GCD(unsigned long a, unsigned long b)
+{
+ while (a != b) {
+ if (a < b)
+ b -= a;
+ if (b < a)
+ a -= b;
+ }
+ return a;
+}
+
+/*
+ * conf_line reads one logical line from the conffile or mdstat.
+ * It skips comments and continues until it finds a line that starts
+ * with a non blank/comment. This character is pushed back for the next call
+ * A doubly linked list of words is returned.
+ * the first word will be a keyword. Other words will have had quotes removed.
+ */
+
+char *conf_line(FILE *file)
+{
+ char *w;
+ char *list;
+
+ w = conf_word(file, 1);
+ if (w == NULL)
+ return NULL;
+
+ list = dl_strdup(w);
+ free(w);
+ dl_init(list);
+
+ while ((w = conf_word(file, 0))){
+ char *w2 = dl_strdup(w);
+ free(w);
+ dl_add(list, w2);
+ }
+/* printf("got a line\n");*/
+ return list;
+}
+
+void free_line(char *line)
+{
+ char *w;
+ for (w = dl_next(line); w != line; w = dl_next(line)) {
+ dl_del(w);
+ dl_free(w);
+ }
+ dl_free(line);
+}
projects / thirdparty / mdadm.git / blobdiff