/*
* util_file_map_whole -- maps the entire file into memory
*/
void *
util_file_map_whole(const char *path)
{
int fd;
int olderrno;
void *addr = NULL;
if ((fd = open(path, O_RDWR)) < 0)
return NULL;
ssize_t size = util_file_get_size(path);
if (size < 0)
goto out;
addr = util_map(fd, (size_t)size, 0, 0);
if (addr == NULL)
goto out;
out:
olderrno = errno;
(void) close(fd);
errno = olderrno;
return addr;
}
/*
* util_file_zero_whole -- zeroes the entire file
*/
int
util_file_zero_whole(const char *path)
{
int fd;
int olderrno;
int ret = 0;
if ((fd = open(path, O_RDWR)) < 0)
return -1;
ssize_t size = util_file_get_size(path);
if (size < 0) {
ret = -1;
goto out;
}
void *addr = util_map(fd, (size_t)size, 0, 0);
if (addr == NULL) {
ret = -1;
goto out;
}
/* zero initialize the entire device */
memset(addr, 0, (size_t)size);
util_unmap(addr, (size_t)size);
out:
olderrno = errno;
(void) close(fd);
errno = olderrno;
return ret;
}
/*
* util_file_map_whole -- maps the entire file into memory
*/
void *
util_file_map_whole(const char *path)
{
LOG(3, "path \"%s\"", path);
int fd;
int olderrno;
void *addr = NULL;
if ((fd = os_open(path, O_RDWR)) < 0) {
ERR("!open \"%s\"", path);
return NULL;
}
ssize_t size = util_file_get_size(path);
if (size < 0) {
LOG(2, "cannot determine file length \"%s\"", path);
goto out;
}
addr = util_map(fd, (size_t)size, MAP_SHARED, 0, 0, NULL);
if (addr == NULL) {
LOG(2, "failed to map entire file \"%s\"", path);
goto out;
}
out:
olderrno = errno;
(void) os_close(fd);
errno = olderrno;
return addr;
}
/*
* util_file_zero -- zeroes the specified region of the file
*/
int
util_file_zero(const char *path, os_off_t off, size_t len)
{
LOG(3, "path \"%s\" off %ju len %zu", path, off, len);
int fd;
int olderrno;
int ret = 0;
if ((fd = os_open(path, O_RDWR)) < 0) {
ERR("!open \"%s\"", path);
return -1;
}
ssize_t size = util_file_get_size(path);
if (size < 0) {
LOG(2, "cannot determine file length \"%s\"", path);
ret = -1;
goto out;
}
if (off > size) {
LOG(2, "offset beyond file length, %ju > %ju", off, size);
ret = -1;
goto out;
}
if ((size_t)off + len > (size_t)size) {
LOG(2, "requested size of write goes beyond the file length, "
"%zu > %zu", (size_t)off + len, size);
LOG(4, "adjusting len to %zu", size - off);
len = (size_t)(size - off);
}
void *addr = util_map(fd, (size_t)size, MAP_SHARED, 0, 0, NULL);
if (addr == NULL) {
LOG(2, "failed to map entire file \"%s\"", path);
ret = -1;
goto out;
}
/* zero initialize the specified region */
memset((char *)addr + off, 0, len);
util_unmap(addr, (size_t)size);
out:
olderrno = errno;
(void) os_close(fd);
errno = olderrno;
return ret;
}
/*
* libvmmalloc_create -- (internal) create a memory pool in a temp file
*/
static VMEM *
libvmmalloc_create(const char *dir, size_t size)
{
LOG(3, "dir \"%s\" size %zu", dir, size);
if (size < VMMALLOC_MIN_POOL) {
LOG(1, "size %zu smaller than %zu", size, VMMALLOC_MIN_POOL);
errno = EINVAL;
return NULL;
}
/* silently enforce multiple of page size */
size = roundup(size, Pagesize);
Fd = util_tmpfile(dir, size);
if (Fd == -1)
return NULL;
void *addr;
if ((addr = util_map(Fd, size, 0, 4 << 20)) == NULL)
return NULL;
/* store opaque info at beginning of mapped area */
struct vmem *vmp = addr;
memset(&vmp->hdr, '\0', sizeof (vmp->hdr));
memcpy(vmp->hdr.signature, VMEM_HDR_SIG, POOL_HDR_SIG_LEN);
vmp->addr = addr;
vmp->size = size;
vmp->caller_mapped = 0;
/* Prepare pool for jemalloc */
if (je_vmem_pool_create((void *)((uintptr_t)addr + Header_size),
size - Header_size, 1) == NULL) {
LOG(1, "vmem pool creation failed");
util_unmap(vmp->addr, vmp->size);
return NULL;
}
/*
* If possible, turn off all permissions on the pool header page.
*
* The prototype PMFS doesn't allow this when large pages are in
* use. It is not considered an error if this fails.
*/
util_range_none(addr, sizeof (struct pool_hdr));
LOG(3, "vmp %p", vmp);
return vmp;
}
/*
* pmem_map -- map the entire file for read/write access
*/
void *
pmem_map(int fd)
{
LOG(3, "fd %d", fd);
struct stat stbuf;
if (fstat(fd, &stbuf) < 0) {
ERR("!fstat");
return NULL;
}
void *addr;
if ((addr = util_map(fd, stbuf.st_size, 0)) == NULL)
return NULL; /* util_map() set errno, called LOG */
LOG(3, "returning %p", addr);
VALGRIND_REGISTER_PMEM_MAPPING(addr, stbuf.st_size);
VALGRIND_REGISTER_PMEM_FILE(fd, addr, stbuf.st_size, 0);
return addr;
}
/*
* util_map_tmpfile -- reserve space in an unlinked file and memory-map it
*
* size must be multiple of page size.
*/
void *
util_map_tmpfile(const char *dir, size_t size, size_t req_align)
{
int oerrno;
if (((off_t)size) < 0) {
ERR("invalid size (%zu) for off_t", size);
errno = EFBIG;
return NULL;
}
int fd = util_tmpfile(dir, "/vmem.XXXXXX");
if (fd == -1) {
LOG(2, "cannot create temporary file in dir %s", dir);
goto err;
}
if ((errno = posix_fallocate(fd, 0, (off_t)size)) != 0) {
ERR("!posix_fallocate");
goto err;
}
void *base;
if ((base = util_map(fd, size, 0, req_align)) == NULL) {
LOG(2, "cannot mmap temporary file");
goto err;
}
(void) close(fd);
return base;
err:
oerrno = errno;
if (fd != -1)
(void) close(fd);
errno = oerrno;
return NULL;
}
/*
* pool_parse_params -- parse pool type, file size and block size
*/
static int
pool_params_parse(const PMEMpoolcheck *ppc, struct pool_params *params,
int check)
{
LOG(3, NULL);
int is_btt = ppc->args.pool_type == PMEMPOOL_POOL_TYPE_BTT;
params->type = POOL_TYPE_UNKNOWN;
params->is_poolset = util_is_poolset_file(ppc->path) == 1;
int fd = util_file_open(ppc->path, NULL, 0, O_RDONLY);
if (fd < 0)
return -1;
int ret = 0;
os_stat_t stat_buf;
ret = os_fstat(fd, &stat_buf);
if (ret)
goto out_close;
ASSERT(stat_buf.st_size >= 0);
params->mode = stat_buf.st_mode;
struct pool_set *set;
void *addr;
if (params->is_poolset) {
/*
* Need to close the poolset because it will be opened with
* flock in the following instructions.
*/
os_close(fd);
fd = -1;
if (check) {
if (pool_set_map(ppc->path, &set, 0))
return -1;
} else {
ret = util_poolset_create_set(&set, ppc->path, 0, 0);
if (ret < 0) {
LOG(2, "cannot open pool set -- '%s'",
ppc->path);
return -1;
}
if (set->remote) {
ERR("poolsets with remote replicas are not "
"supported");
return -1;
}
if (util_pool_open_nocheck(set, 0))
return -1;
}
params->size = set->poolsize;
addr = set->replica[0]->part[0].addr;
/*
* XXX mprotect for device dax with length not aligned to its
* page granularity causes SIGBUS on the next page fault.
* The length argument of this call should be changed to
* set->poolsize once the kernel issue is solved.
*/
if (mprotect(addr, set->replica[0]->repsize,
PROT_READ) < 0) {
ERR("!mprotect");
goto out_unmap;
}
params->is_dev_dax = set->replica[0]->part[0].is_dev_dax;
} else if (is_btt) {
params->size = (size_t)stat_buf.st_size;
#ifndef _WIN32
if (params->mode & S_IFBLK)
if (ioctl(fd, BLKGETSIZE64, ¶ms->size)) {
ERR("!ioctl");
goto out_close;
}
#endif
addr = NULL;
} else {
ssize_t s = util_file_get_size(ppc->path);
if (s < 0) {
ret = -1;
goto out_close;
}
params->size = (size_t)s;
addr = util_map(fd, params->size, MAP_SHARED, 1, 0);
if (addr == NULL) {
ret = -1;
goto out_close;
}
params->is_dev_dax = util_file_is_device_dax(ppc->path);
}
/* stop processing for BTT device */
if (is_btt) {
params->type = POOL_TYPE_BTT;
params->is_part = false;
goto out_close;
}
struct pool_hdr hdr;
memcpy(&hdr, addr, sizeof(hdr));
util_convert2h_hdr_nocheck(&hdr);
pool_params_from_header(params, &hdr);
if (ppc->args.pool_type != PMEMPOOL_POOL_TYPE_DETECT) {
enum pool_type declared_type =
pool_check_type_to_pool_type(ppc->args.pool_type);
if ((params->type & ~declared_type) != 0) {
ERR("declared pool type does not match");
ret = 1;
goto out_unmap;
}
}
if (params->type == POOL_TYPE_BLK) {
struct pmemblk pbp;
memcpy(&pbp, addr, sizeof(pbp));
params->blk.bsize = le32toh(pbp.bsize);
} else if (params->type == POOL_TYPE_OBJ) {
struct pmemobjpool *pop = addr;
memcpy(params->obj.layout, pop->layout,
PMEMOBJ_MAX_LAYOUT);
}
out_unmap:
if (params->is_poolset) {
ASSERTeq(fd, -1);
ASSERTne(addr, NULL);
util_poolset_close(set, DO_NOT_DELETE_PARTS);
} else if (!is_btt) {
ASSERTne(fd, -1);
ASSERTne(addr, NULL);
munmap(addr, params->size);
}
out_close:
if (fd != -1)
os_close(fd);
return ret;
}
/*
* pmemlog_map_common -- (internal) map a log memory pool
*
* This routine does all the work, but takes a rdonly flag so internal
* calls can map a read-only pool if required.
*
* If empty flag is set, the file is assumed to be a new memory pool, and
* a new pool header is created. Otherwise, a valid header must exist.
*/
static PMEMlogpool *
pmemlog_map_common(int fd, size_t poolsize, int rdonly, int empty)
{
LOG(3, "fd %d poolsize %zu rdonly %d empty %d",
fd, poolsize, rdonly, empty);
void *addr;
if ((addr = util_map(fd, poolsize, rdonly)) == NULL) {
(void) close(fd);
return NULL; /* util_map() set errno, called LOG */
}
VALGRIND_REGISTER_PMEM_MAPPING(addr, poolsize);
VALGRIND_REGISTER_PMEM_FILE(fd, addr, poolsize, 0);
(void) close(fd);
/* check if the mapped region is located in persistent memory */
int is_pmem = pmem_is_pmem(addr, poolsize);
/* opaque info lives at the beginning of mapped memory pool */
struct pmemlog *plp = addr;
if (!empty) {
struct pool_hdr hdr;
memcpy(&hdr, &plp->hdr, sizeof (hdr));
if (!util_convert_hdr(&hdr)) {
errno = EINVAL;
goto err;
}
/*
* valid header found
*/
if (strncmp(hdr.signature, LOG_HDR_SIG, POOL_HDR_SIG_LEN)) {
ERR("wrong pool type: \"%s\"", hdr.signature);
errno = EINVAL;
goto err;
}
if (hdr.major != LOG_FORMAT_MAJOR) {
ERR("log pool version %d (library expects %d)",
hdr.major, LOG_FORMAT_MAJOR);
errno = EINVAL;
goto err;
}
/* XXX - pools sets / replicas */
if (memcmp(hdr.uuid, hdr.prev_part_uuid, POOL_HDR_UUID_LEN) ||
memcmp(hdr.uuid, hdr.next_part_uuid, POOL_HDR_UUID_LEN) ||
memcmp(hdr.uuid, hdr.prev_repl_uuid, POOL_HDR_UUID_LEN) ||
memcmp(hdr.uuid, hdr.next_repl_uuid, POOL_HDR_UUID_LEN)) {
ERR("wrong UUID");
errno = EINVAL;
goto err;
}
uint64_t hdr_start = le64toh(plp->start_offset);
uint64_t hdr_end = le64toh(plp->end_offset);
uint64_t hdr_write = le64toh(plp->write_offset);
if ((hdr_start != roundup(sizeof (*plp),
LOG_FORMAT_DATA_ALIGN)) ||
(hdr_end != poolsize) || (hdr_start > hdr_end)) {
ERR("wrong start/end offsets (start: %ju end: %ju), "
"pool size %zu",
hdr_start, hdr_end, poolsize);
errno = EINVAL;
goto err;
}
if ((hdr_write > hdr_end) || (hdr_write < hdr_start)) {
ERR("wrong write offset "
"(start: %ju end: %ju write: %ju)",
hdr_start, hdr_end, hdr_write);
errno = EINVAL;
goto err;
}
LOG(3, "start: %ju, end: %ju, write: %ju",
hdr_start, hdr_end, hdr_write);
int retval = util_feature_check(&hdr, LOG_FORMAT_INCOMPAT,
LOG_FORMAT_RO_COMPAT,
LOG_FORMAT_COMPAT);
if (retval < 0)
goto err;
else if (retval == 0)
rdonly = 1;
} else {
LOG(3, "creating new log memory pool");
ASSERTeq(rdonly, 0);
struct pool_hdr *hdrp = &plp->hdr;
/* check if the pool header is all zero */
if (!util_is_zeroed(hdrp, sizeof (*hdrp))) {
ERR("Non-empty file detected");
errno = EINVAL;
goto err;
}
/* create required metadata first */
plp->start_offset = htole64(roundup(sizeof (*plp),
LOG_FORMAT_DATA_ALIGN));
plp->end_offset = htole64(poolsize);
plp->write_offset = plp->start_offset;
/* store non-volatile part of pool's descriptor */
pmem_msync(&plp->start_offset, 3 * sizeof (uint64_t));
/* create pool header */
strncpy(hdrp->signature, LOG_HDR_SIG, POOL_HDR_SIG_LEN);
hdrp->major = htole32(LOG_FORMAT_MAJOR);
hdrp->compat_features = htole32(LOG_FORMAT_COMPAT);
hdrp->incompat_features = htole32(LOG_FORMAT_INCOMPAT);
hdrp->ro_compat_features = htole32(LOG_FORMAT_RO_COMPAT);
uuid_generate(hdrp->uuid);
/* XXX - pools sets / replicas */
uuid_generate(hdrp->poolset_uuid);
memcpy(hdrp->prev_part_uuid, hdrp->uuid, POOL_HDR_UUID_LEN);
memcpy(hdrp->next_part_uuid, hdrp->uuid, POOL_HDR_UUID_LEN);
memcpy(hdrp->prev_repl_uuid, hdrp->uuid, POOL_HDR_UUID_LEN);
memcpy(hdrp->next_repl_uuid, hdrp->uuid, POOL_HDR_UUID_LEN);
hdrp->crtime = htole64((uint64_t)time(NULL));
if (util_get_arch_flags(&hdrp->arch_flags)) {
ERR("Reading architecture flags failed\n");
errno = EINVAL;
goto err;
}
hdrp->arch_flags.alignment_desc =
htole64(hdrp->arch_flags.alignment_desc);
hdrp->arch_flags.e_machine =
htole16(hdrp->arch_flags.e_machine);
util_checksum(hdrp, sizeof (*hdrp), &hdrp->checksum, 1);
/* store pool's header */
pmem_msync(hdrp, sizeof (*hdrp));
}
/* remove volatile part of header */
VALGRIND_REMOVE_PMEM_MAPPING(&plp->addr,
sizeof (struct pmemlog) -
sizeof (struct pool_hdr) -
3 * sizeof (uint64_t));
/*
* Use some of the memory pool area for run-time info. This
* run-time state is never loaded from the file, it is always
* created here, so no need to worry about byte-order.
*/
plp->addr = addr;
plp->size = poolsize;
plp->rdonly = rdonly;
plp->is_pmem = is_pmem;
if ((plp->rwlockp = Malloc(sizeof (*plp->rwlockp))) == NULL) {
ERR("!Malloc for a RW lock");
goto err;
}
if ((errno = pthread_rwlock_init(plp->rwlockp, NULL))) {
ERR("!pthread_rwlock_init");
goto err_free;
}
/*
* If possible, turn off all permissions on the pool header page.
*
* The prototype PMFS doesn't allow this when large pages are in
* use. It is not considered an error if this fails.
*/
util_range_none(addr, sizeof (struct pool_hdr));
/* the rest should be kept read-only (debug version only) */
RANGE_RO(addr + sizeof (struct pool_hdr),
poolsize - sizeof (struct pool_hdr));
LOG(3, "plp %p", plp);
return plp;
err_free:
Free((void *)plp->rwlockp);
err:
LOG(4, "error clean up");
int oerrno = errno;
VALGRIND_REMOVE_PMEM_MAPPING(addr, poolsize);
util_unmap(addr, poolsize);
errno = oerrno;
return NULL;
}
/*
* pmemlog_map_common -- (internal) map a log memory pool
*
* This routine does all the work, but takes a rdonly flag so internal
* calls can map a read-only pool if required.
*/
static PMEMlog *
pmemlog_map_common(int fd, int rdonly)
{
LOG(3, "fd %d rdonly %d", fd, rdonly);
struct stat stbuf;
if (fstat(fd, &stbuf) < 0) {
LOG(1, "!fstat");
return NULL;
}
if (stbuf.st_size < PMEMLOG_MIN_POOL) {
LOG(1, "size %lld smaller than %zu",
(long long)stbuf.st_size, PMEMLOG_MIN_POOL);
errno = EINVAL;
return NULL;
}
void *addr;
if ((addr = util_map(fd, stbuf.st_size, rdonly)) == NULL)
return NULL; /* util_map() set errno, called LOG */
/* check if the mapped region is located in persistent memory */
int is_pmem = pmem_is_pmem(addr, stbuf.st_size);
/* opaque info lives at the beginning of mapped memory pool */
struct pmemlog *plp = addr;
struct pool_hdr hdr;
memcpy(&hdr, &plp->hdr, sizeof (hdr));
if (util_convert_hdr(&hdr)) {
/*
* valid header found
*/
if (strncmp(hdr.signature, LOG_HDR_SIG, POOL_HDR_SIG_LEN)) {
LOG(1, "wrong pool type: \"%s\"", hdr.signature);
errno = EINVAL;
goto err;
}
if (hdr.major != LOG_FORMAT_MAJOR) {
LOG(1, "log pool version %d (library expects %d)",
hdr.major, LOG_FORMAT_MAJOR);
errno = EINVAL;
goto err;
}
uint64_t hdr_start = le64toh(plp->start_offset);
uint64_t hdr_end = le64toh(plp->end_offset);
uint64_t hdr_write = le64toh(plp->write_offset);
if ((hdr_start != roundup(sizeof (*plp),
LOG_FORMAT_DATA_ALIGN)) ||
(hdr_end != stbuf.st_size) || (hdr_start > hdr_end)) {
LOG(1, "wrong start/end offsets (start: %ju end: %ju), "
"pool size %lld",
hdr_start, hdr_end, (long long)stbuf.st_size);
errno = EINVAL;
goto err;
}
if ((hdr_write > hdr_end) || (hdr_write < hdr_start)) {
LOG(1, "wrong write offset "
"(start: %ju end: %ju write: %ju)",
hdr_start, hdr_end, hdr_write);
errno = EINVAL;
goto err;
}
LOG(3, "start: %ju, end: %ju, write: %ju",
hdr_start, hdr_end, hdr_write);
int retval = util_feature_check(&hdr, LOG_FORMAT_INCOMPAT,
LOG_FORMAT_RO_COMPAT,
LOG_FORMAT_COMPAT);
if (retval < 0)
goto err;
else if (retval == 0)
rdonly = 1;
} else {
/*
* no valid header was found
*/
if (rdonly) {
LOG(1, "read-only and no header found");
errno = EROFS;
goto err;
}
LOG(3, "creating new log memory pool");
struct pool_hdr *hdrp = &plp->hdr;
memset(hdrp, '\0', sizeof (*hdrp));
strncpy(hdrp->signature, LOG_HDR_SIG, POOL_HDR_SIG_LEN);
hdrp->major = htole32(LOG_FORMAT_MAJOR);
hdrp->compat_features = htole32(LOG_FORMAT_COMPAT);
hdrp->incompat_features = htole32(LOG_FORMAT_INCOMPAT);
hdrp->ro_compat_features = htole32(LOG_FORMAT_RO_COMPAT);
uuid_generate(hdrp->uuid);
hdrp->crtime = htole64((uint64_t)time(NULL));
util_checksum(hdrp, sizeof (*hdrp), &hdrp->checksum, 1);
hdrp->checksum = htole64(hdrp->checksum);
/* store pool's header */
libpmem_persist(is_pmem, hdrp, sizeof (*hdrp));
/* create rest of required metadata */
plp->start_offset = htole64(roundup(sizeof (*plp),
LOG_FORMAT_DATA_ALIGN));
plp->end_offset = htole64(stbuf.st_size);
plp->write_offset = plp->start_offset;
/* store non-volatile part of pool's descriptor */
libpmem_persist(is_pmem, &plp->start_offset,
3 * sizeof (uint64_t));
}
/*
* Use some of the memory pool area for run-time info. This
* run-time state is never loaded from the file, it is always
* created here, so no need to worry about byte-order.
*/
plp->addr = addr;
plp->size = stbuf.st_size;
plp->rdonly = rdonly;
plp->is_pmem = is_pmem;
if ((plp->rwlockp = Malloc(sizeof (*plp->rwlockp))) == NULL) {
LOG(1, "!Malloc for a RW lock");
goto err;
}
if (pthread_rwlock_init(plp->rwlockp, NULL)) {
LOG(1, "!pthread_rwlock_init");
goto err_free;
}
/*
* If possible, turn off all permissions on the pool header page.
*
* The prototype PMFS doesn't allow this when large pages are in
* use. It is not considered an error if this fails.
*/
util_range_none(addr, sizeof (struct pool_hdr));
/* the rest should be kept read-only (debug version only) */
RANGE_RO(addr + sizeof (struct pool_hdr),
stbuf.st_size - sizeof (struct pool_hdr));
LOG(3, "plp %p", plp);
return plp;
err_free:
Free((void *)plp->rwlockp);
err:
LOG(4, "error clean up");
int oerrno = errno;
util_unmap(addr, stbuf.st_size);
errno = oerrno;
return NULL;
}
/*
* pmemblk_map_common -- (internal) map a block memory pool
*
* This routine does all the work, but takes a rdonly flag so internal
* calls can map a read-only pool if required.
*
* Passing in bsize == 0 means a valid pool header must exist (which
* will supply the block size).
*/
static PMEMblk *
pmemblk_map_common(int fd, size_t bsize, int rdonly)
{
LOG(3, "fd %d bsize %zu rdonly %d", fd, bsize, rdonly);
/* things free by "goto err" if not NULL */
void *addr = NULL;
struct btt *bttp = NULL;
pthread_mutex_t *locks = NULL;
struct stat stbuf;
if (fstat(fd, &stbuf) < 0) {
LOG(1, "!fstat");
return NULL;
}
if (stbuf.st_size < PMEMBLK_MIN_POOL) {
LOG(1, "size %zu smaller than %zu",
stbuf.st_size, PMEMBLK_MIN_POOL);
errno = EINVAL;
return NULL;
}
if ((addr = util_map(fd, stbuf.st_size, rdonly)) == NULL)
return NULL; /* util_map() set errno, called LOG */
/* check if the mapped region is located in persistent memory */
int is_pmem = pmem_is_pmem(addr, stbuf.st_size);
/* opaque info lives at the beginning of mapped memory pool */
struct pmemblk *pbp = addr;
struct pool_hdr hdr;
memcpy(&hdr, &pbp->hdr, sizeof (hdr));
if (util_convert_hdr(&hdr)) {
/*
* valid header found
*/
if (strncmp(hdr.signature, BLK_HDR_SIG, POOL_HDR_SIG_LEN)) {
LOG(1, "wrong pool type: \"%s\"", hdr.signature);
errno = EINVAL;
goto err;
}
if (hdr.major != BLK_FORMAT_MAJOR) {
LOG(1, "blk pool version %d (library expects %d)",
hdr.major, BLK_FORMAT_MAJOR);
errno = EINVAL;
goto err;
}
size_t hdr_bsize = le32toh(pbp->bsize);
if (bsize && bsize != hdr_bsize) {
LOG(1, "wrong bsize (%zu), pool created with bsize %zu",
bsize, hdr_bsize);
errno = EINVAL;
goto err;
}
bsize = hdr_bsize;
LOG(3, "using block size from header: %zu", bsize);
int retval = util_feature_check(&hdr, BLK_FORMAT_INCOMPAT,
BLK_FORMAT_RO_COMPAT,
BLK_FORMAT_COMPAT);
if (retval < 0)
goto err;
else if (retval == 0)
rdonly = 1;
} else {
/*
* no valid header was found
*/
if (rdonly) {
LOG(1, "read-only and no header found");
errno = EROFS;
goto err;
}
LOG(3, "creating new blk memory pool");
struct pool_hdr *hdrp = &pbp->hdr;
memset(hdrp, '\0', sizeof (*hdrp));
strncpy(hdrp->signature, BLK_HDR_SIG, POOL_HDR_SIG_LEN);
hdrp->major = htole32(BLK_FORMAT_MAJOR);
hdrp->compat_features = htole32(BLK_FORMAT_COMPAT);
hdrp->incompat_features = htole32(BLK_FORMAT_INCOMPAT);
hdrp->ro_compat_features = htole32(BLK_FORMAT_RO_COMPAT);
uuid_generate(hdrp->uuid);
hdrp->crtime = htole64((uint64_t)time(NULL));
util_checksum(hdrp, sizeof (*hdrp), &hdrp->checksum, 1);
hdrp->checksum = htole64(hdrp->checksum);
/* store pool's header */
libpmem_persist(is_pmem, hdrp, sizeof (*hdrp));
/* create rest of required metadata */
pbp->bsize = htole32(bsize);
libpmem_persist(is_pmem, &pbp->bsize, sizeof (bsize));
}
/*
* Use some of the memory pool area for run-time info. This
* run-time state is never loaded from the file, it is always
* created here, so no need to worry about byte-order.
*/
pbp->addr = addr;
pbp->size = stbuf.st_size;
pbp->rdonly = rdonly;
pbp->is_pmem = is_pmem;
pbp->data = addr + roundup(sizeof (*pbp), BLK_FORMAT_DATA_ALIGN);
pbp->datasize = (pbp->addr + pbp->size) - pbp->data;
LOG(4, "data area %p data size %zu bsize %zu",
pbp->data, pbp->datasize, bsize);
int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
if (ncpus < 1)
ncpus = 1;
bttp = btt_init(pbp->datasize, (uint32_t)bsize, pbp->hdr.uuid,
ncpus, pbp, &ns_cb);
if (bttp == NULL)
goto err; /* btt_init set errno, called LOG */
pbp->bttp = bttp;
pbp->nlane = btt_nlane(pbp->bttp);
pbp->next_lane = 0;
if ((locks = Malloc(pbp->nlane * sizeof (*locks))) == NULL) {
LOG(1, "!Malloc for lane locks");
goto err;
}
for (int i = 0; i < pbp->nlane; i++)
if (pthread_mutex_init(&locks[i], NULL) < 0) {
LOG(1, "!pthread_mutex_init");
goto err;
}
pbp->locks = locks;
#ifdef DEBUG
/* initialize debug lock */
if (pthread_mutex_init(&pbp->write_lock, NULL) < 0) {
LOG(1, "!pthread_mutex_init");
goto err;
}
#endif
/*
* If possible, turn off all permissions on the pool header page.
*
* The prototype PMFS doesn't allow this when large pages are in
* use not it is not considered an error if this fails.
*/
util_range_none(addr, sizeof (struct pool_hdr));
/* the data area should be kept read-only for debug version */
RANGE_RO(pbp->data, pbp->datasize);
LOG(3, "pbp %p", pbp);
return pbp;
err:
LOG(4, "error clean up");
int oerrno = errno;
if (locks)
Free((void *)locks);
if (bttp)
btt_fini(bttp);
util_unmap(addr, stbuf.st_size);
errno = oerrno;
return NULL;
}
