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Read spl_hostid module parameter before gethostid()

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If spl_hostid is set via module parameter, it's likely different from
gethostid(). Therefore, the userspace tool should read it first before
falling back to gethostid().

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3034
This commit is contained in:
Chunwei Chen 2015-01-23 16:05:04 +08:00 committed by Brian Behlendorf
parent aa2ef419e4
commit 53698a453d
4 changed files with 28 additions and 3 deletions
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2
cmd/zpool/zpool_main.c
View File

@ -1917,7 +1917,7 @@ do_import(nvlist_t *config, const char *newname, const char *mntopts,
} else if (state != POOL_STATE_EXPORTED &&
!(flags & ZFS_IMPORT_ANY_HOST)) {
uint64_t hostid = 0;
unsigned long system_hostid = gethostid() & 0xffffffff;
unsigned long system_hostid = get_system_hostid();
(void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_HOSTID,
&hostid);

1
include/libzfs.h
View File

@ -350,6 +350,7 @@ typedef enum {
ZPOOL_STATUS_OK
} zpool_status_t;
extern unsigned long get_system_hostid(void);
extern zpool_status_t zpool_get_status(zpool_handle_t *, char **,
zpool_errata_t *);
extern zpool_status_t zpool_import_status(nvlist_t *, char **,

2
lib/libzfs/libzfs_status.c
View File

@ -195,7 +195,7 @@ check_status(nvlist_t *config, boolean_t isimport, zpool_errata_t *erratap)
uint64_t suspended;
uint64_t hostid = 0;
uint64_t errata = 0;
unsigned long system_hostid = gethostid() & 0xffffffff;
unsigned long system_hostid = get_system_hostid();
verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
&version) == 0);

26
lib/libzpool/kernel.c
View File

@ -1107,6 +1107,30 @@ umem_out_of_memory(void)
return (0);
}
static unsigned long
get_spl_hostid(void)
{
FILE *f;
unsigned long hostid;
f = fopen("/sys/module/spl/parameters/spl_hostid", "r");
if (!f)
return (0);
if (fscanf(f, "%lu", &hostid) != 1)
hostid = 0;
fclose(f);
return (hostid & 0xffffffff);
}
unsigned long
get_system_hostid(void)
{
unsigned long system_hostid = get_spl_hostid();
if (system_hostid == 0)
system_hostid = gethostid() & 0xffffffff;
return (system_hostid);
}
void
kernel_init(int mode)
{
@ -1120,7 +1144,7 @@ kernel_init(int mode)
(double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30));
(void) snprintf(hw_serial, sizeof (hw_serial), "%ld",
(mode & FWRITE) ? gethostid() : 0);
(mode & FWRITE) ? get_system_hostid() : 0);
VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1);
VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1);