int read_config_fd(struct config_tree *cft, struct device *dev,
off_t offset, size_t size, off_t offset2, size_t size2,
checksum_fn_t checksum_fn, uint32_t checksum)
{
struct cs *c = (struct cs *) cft;
struct parser *p;
int r = 0;
int use_mmap = 1;
off_t mmap_offset = 0;
char *buf = NULL;
if (!(p = dm_pool_alloc(c->mem, sizeof(*p))))
return_0;
p->mem = c->mem;
/* Only use mmap with regular files */
if (!(dev->flags & DEV_REGULAR) || size2)
use_mmap = 0;
if (use_mmap) {
mmap_offset = offset % lvm_getpagesize();
/* memory map the file */
p->fb = mmap((caddr_t) 0, size + mmap_offset, PROT_READ,
MAP_PRIVATE, dev_fd(dev), offset - mmap_offset);
if (p->fb == (caddr_t) (-1)) {
log_sys_error("mmap", dev_name(dev));
goto out;
}
p->fb = p->fb + mmap_offset;
} else {
if (!(buf = dm_malloc(size + size2)))
return_0;
if (!dev_read_circular(dev, (uint64_t) offset, size,
(uint64_t) offset2, size2, buf)) {
goto out;
}
p->fb = buf;
}
if (checksum_fn && checksum !=
(checksum_fn(checksum_fn(INITIAL_CRC, (const uint8_t *)p->fb, size),
(const uint8_t *)(p->fb + size), size2))) {
log_error("%s: Checksum error", dev_name(dev));
goto out;
}
p->fe = p->fb + size + size2;
if (!_parse_config_file(p, cft))
goto_out;
r = 1;
out:
if (!use_mmap)
dm_free(buf);
else {
/* unmap the file */
if (munmap((char *) (p->fb - mmap_offset), size + mmap_offset)) {
log_sys_error("munmap", dev_name(dev));
r = 0;
}
}
return r;
}
int config_file_read_fd(struct dm_config_tree *cft, struct device *dev,
off_t offset, size_t size, off_t offset2, size_t size2,
checksum_fn_t checksum_fn, uint32_t checksum)
{
char *fb, *fe;
int r = 0;
int use_mmap = 1;
off_t mmap_offset = 0;
char *buf = NULL;
struct config_source *cs = dm_config_get_custom(cft);
if ((cs->type != CONFIG_FILE) && (cs->type != CONFIG_PROFILE)) {
log_error(INTERNAL_ERROR "config_file_read_fd: expected file or profile config source, "
"found %s config source.", _config_source_names[cs->type]);
return 0;
}
/* Only use mmap with regular files */
if (!(dev->flags & DEV_REGULAR) || size2)
use_mmap = 0;
if (use_mmap) {
mmap_offset = offset % lvm_getpagesize();
/* memory map the file */
fb = mmap((caddr_t) 0, size + mmap_offset, PROT_READ,
MAP_PRIVATE, dev_fd(dev), offset - mmap_offset);
if (fb == (caddr_t) (-1)) {
log_sys_error("mmap", dev_name(dev));
goto out;
}
fb = fb + mmap_offset;
} else {
if (!(buf = dm_malloc(size + size2))) {
log_error("Failed to allocate circular buffer.");
return 0;
}
if (!dev_read_circular(dev, (uint64_t) offset, size,
(uint64_t) offset2, size2, buf)) {
goto out;
}
fb = buf;
}
if (checksum_fn && checksum !=
(checksum_fn(checksum_fn(INITIAL_CRC, (const uint8_t *)fb, size),
(const uint8_t *)(fb + size), size2))) {
log_error("%s: Checksum error", dev_name(dev));
goto out;
}
fe = fb + size + size2;
if (!dm_config_parse(cft, fb, fe))
goto_out;
r = 1;
out:
if (!use_mmap)
dm_free(buf);
else {
/* unmap the file */
if (munmap(fb - mmap_offset, size + mmap_offset)) {
log_sys_error("munmap", dev_name(dev));
r = 0;
}
}
return r;
}
