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Create: support --readonly flag. 

Allow array to be created read-only

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-07-09 17:14:17 +10:00
parent 0ea8f5b167
commit 72d566f68d
3 changed files with 22 additions and 6 deletions
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19
Create.c
View File

@ -67,7 +67,8 @@ int Create(struct supertype *st, char *mddev,
int raiddisks, int sparedisks,
char *name, char *homehost, int *uuid,
int subdevs, struct mddev_dev *devlist,
int runstop, int verbose, int force, int assume_clean,
int runstop, int readonly, int verbose,
int force, int assume_clean,
char *bitmap_file, int bitmap_chunk, int write_behind,
int delay, int autof)
{
@ -958,7 +959,9 @@ int Create(struct supertype *st, char *mddev,
case LEVEL_MULTIPATH:
case 0:
err = sysfs_set_str(&info, NULL, "array_state",
"active");
readonly
? "readonly"
: "active");
need_mdmon = 0;
break;
default:
@ -973,12 +976,22 @@ int Create(struct supertype *st, char *mddev,
ioctl(mdfd, STOP_ARRAY, NULL);
goto abort;
}
} else if (readonly &&
sysfs_attribute_available(
&info, NULL, "array_state")) {
if (sysfs_set_str(&info, NULL,
"array_state", "readonly") < 0) {
pr_err("Failed to start array: %s\n",
strerror(errno));
ioctl(mdfd, STOP_ARRAY, NULL);
goto abort;
}
} else {
/* param is not actually used */
mdu_param_t param;
if (ioctl(mdfd, RUN_ARRAY, &param)) {
pr_err("RUN_ARRAY failed: %s\n",
strerror(errno));
strerror(errno));
if (info.array.chunk_size & (info.array.chunk_size-1)) {
cont_err("Problem may be that "
"chunk size is not a power of 2\n");

3
mdadm.c
View File

@ -1373,7 +1373,8 @@ int main(int argc, char *argv[])
rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
raiddisks, sparedisks, ident.name, homehost,
ident.uuid_set ? ident.uuid : NULL,
devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
devs_found-1, devlist->next, runstop,
readonly, verbose-quiet, force, assume_clean,
bitmap_file, bitmap_chunk, write_behind, delay, autof);
break;
case MISC:

6
mdadm.h
View File

@ -1085,10 +1085,12 @@ extern int Build(char *mddev, int chunk, int level, int layout,
extern int Create(struct supertype *st, char *mddev,
int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
int chunk, int level, int layout, unsigned long long size,
int raiddisks, int sparedisks,
char *name, char *homehost, int *uuid,
int subdevs, struct mddev_dev *devlist,
int runstop, int verbose, int force, int assume_clean,
int runstop, int readonly, int verbose,
int force, int assume_clean,
char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof);
extern int Detail(char *dev, int brief, int export, int test, char *homehost, char *prefer);