static int _native_check_pv_min_size(struct device *dev)
{
uint64_t size;
int ret = 0;
/* Check it's accessible */
if (!dev_open_readonly_quiet(dev)) {
log_debug_devs("%s: Skipping: open failed", dev_name(dev));
return 0;
}
/* Check it's not too small */
if (!dev_get_size(dev, &size)) {
log_debug_devs("%s: Skipping: dev_get_size failed", dev_name(dev));
goto out;
}
if (size < pv_min_size()) {
log_debug_devs("%s: Skipping: %s", dev_name(dev),
_too_small_to_hold_pv_msg);
goto out;
}
ret = 1;
out:
if (!dev_close(dev))
stack;
return ret;
}
static int _udev_check_pv_min_size(struct device *dev)
{
struct dev_ext *ext;
const char *size_str;
char *endp;
uint64_t size;
if (!(ext = dev_ext_get(dev)))
return_0;
if (!(size_str = udev_device_get_sysattr_value((struct udev_device *)ext->handle, DEV_EXT_UDEV_SYSFS_ATTR_SIZE))) {
log_debug_devs("%s: Skipping: failed to get size from sysfs [%s:%p]",
dev_name(dev), dev_ext_name(dev), dev->ext.handle);
return 0;
}
errno = 0;
size = strtoull(size_str, &endp, 10);
if (errno || !endp || *endp) {
log_debug_devs("%s: Skipping: failed to parse size from sysfs [%s:%p]",
dev_name(dev), dev_ext_name(dev), dev->ext.handle);
return 0;
}
if (size < pv_min_size()) {
log_debug_devs("%s: Skipping: %s [%s:%p]", dev_name(dev),
_too_small_to_hold_pv_msg,
dev_ext_name(dev), dev->ext.handle);
return 0;
}
return 1;
}
static int _dev_discard_blocks(struct device *dev, uint64_t offset_bytes, uint64_t size_bytes)
{
uint64_t discard_range[2];
if (!dev_open(dev))
return_0;
discard_range[0] = offset_bytes;
discard_range[1] = size_bytes;
log_debug_devs("Discarding %" PRIu64 " bytes offset %" PRIu64 " bytes on %s.",
size_bytes, offset_bytes, dev_name(dev));
if (ioctl(dev->fd, BLKDISCARD, &discard_range) < 0) {
log_error("%s: BLKDISCARD ioctl at offset %" PRIu64 " size %" PRIu64 " failed: %s.",
dev_name(dev), offset_bytes, size_bytes, strerror(errno));
if (!dev_close(dev))
stack;
/* It doesn't matter if discard failed, so return success. */
return 1;
}
if (!dev_close(dev))
stack;
return 1;
}
struct dev_ext *dev_ext_get(struct device *dev)
{
struct dev_ext *ext;
void *handle_ptr;
handle_ptr = dev->ext.handle;
if (!(ext = _ext_registry[dev->ext.src].dev_ext_get(dev)))
log_error("Failed to get external handle for device %s [%s].",
dev_name(dev), dev_ext_name(dev));
else if (handle_ptr != dev->ext.handle)
log_debug_devs("%s %s [%s:%p]", _ext_attached_msg, dev_name(dev),
dev_ext_name(dev), dev->ext.handle);
return ext;
}
static void _close(struct device *dev)
{
if (close(dev->fd))
log_sys_error("close", dev_name(dev));
dev->fd = -1;
dev->block_size = -1;
dm_list_del(&dev->open_list);
log_debug_devs("Closed %s", dev_name(dev));
if (dev->flags & DEV_ALLOCED) {
dm_free((void *) dm_list_item(dev->aliases.n, struct str_list)->
str);
dm_free(dev->aliases.n);
dm_free(dev);
}
/*
* Get the sector size from an _open_ device.
*/
static int _get_block_size(struct device *dev, unsigned int *size)
{
const char *name = dev_name(dev);
if (dev->block_size == -1) {
if (ioctl(dev_fd(dev), BLKBSZGET, &dev->block_size) < 0) {
log_sys_error("ioctl BLKBSZGET", name);
return 0;
}
log_debug_devs("%s: block size is %u bytes", name, dev->block_size);
}
*size = (unsigned int) dev->block_size;
return 1;
}
int dev_ext_release(struct device *dev)
{
int r;
void *handle_ptr;
if (!dev->ext.enabled ||
!dev->ext.handle)
return 1;
handle_ptr = dev->ext.handle;
if (!(r = _ext_registry[dev->ext.src].dev_ext_release(dev)))
log_error("Failed to release external handle for device %s [%s:%p].",
dev_name(dev), dev_ext_name(dev), dev->ext.handle);
else
log_debug_devs("External handle detached from device %s [%s:%p]",
dev_name(dev), dev_ext_name(dev), handle_ptr);
return r;
}
static int _native_dev_is_partitioned(struct dev_types *dt, struct device *dev)
{
int r;
if (!_is_partitionable(dt, dev))
return 0;
/* Unpartitioned DASD devices are not supported. */
if (MAJOR(dev->dev) == dt->dasd_major)
return 1;
if (!dev_open_readonly_quiet(dev)) {
log_debug_devs("%s: failed to open device, considering device "
"is partitioned", dev_name(dev));
return 1;
}
r = _has_partition_table(dev);
if (!dev_close(dev))
stack;
return r;
}
int dev_open_flags(struct device *dev, int flags, int direct, int quiet)
{
struct stat buf;
const char *name;
int need_excl = 0, need_rw = 0;
if ((flags & O_ACCMODE) == O_RDWR)
need_rw = 1;
if ((flags & O_EXCL))
need_excl = 1;
if (dev->fd >= 0) {
if (((dev->flags & DEV_OPENED_RW) || !need_rw) &&
((dev->flags & DEV_OPENED_EXCL) || !need_excl)) {
dev->open_count++;
return 1;
}
if (dev->open_count && !need_excl) {
log_debug_devs("%s already opened read-only. Upgrading "
"to read-write.", dev_name(dev));
dev->open_count++;
}
dev_close_immediate(dev);
// FIXME: dev with DEV_ALLOCED is released
// but code is referencing it
}
if (critical_section())
/* FIXME Make this log_error */
log_verbose("dev_open(%s) called while suspended",
dev_name(dev));
if (dev->flags & DEV_REGULAR)
name = dev_name(dev);
else if (!(name = dev_name_confirmed(dev, quiet)))
return_0;
#ifdef O_DIRECT_SUPPORT
if (direct) {
if (!(dev->flags & DEV_O_DIRECT_TESTED))
dev->flags |= DEV_O_DIRECT;
if ((dev->flags & DEV_O_DIRECT))
flags |= O_DIRECT;
}
#endif
#ifdef O_NOATIME
/* Don't update atime on device inodes */
if (!(dev->flags & DEV_REGULAR))
flags |= O_NOATIME;
#endif
if ((dev->fd = open(name, flags, 0777)) < 0) {
#ifdef O_DIRECT_SUPPORT
if (direct && !(dev->flags & DEV_O_DIRECT_TESTED)) {
flags &= ~O_DIRECT;
if ((dev->fd = open(name, flags, 0777)) >= 0) {
dev->flags &= ~DEV_O_DIRECT;
log_debug_devs("%s: Not using O_DIRECT", name);
goto opened;
}
}
#endif
if (quiet)
log_sys_debug("open", name);
else
log_sys_error("open", name);
return 0;
}
#ifdef O_DIRECT_SUPPORT
opened:
if (direct)
dev->flags |= DEV_O_DIRECT_TESTED;
#endif
dev->open_count++;
dev->flags &= ~DEV_ACCESSED_W;
if (need_rw)
dev->flags |= DEV_OPENED_RW;
else
dev->flags &= ~DEV_OPENED_RW;
if (need_excl)
dev->flags |= DEV_OPENED_EXCL;
else
dev->flags &= ~DEV_OPENED_EXCL;
if (!(dev->flags & DEV_REGULAR) &&
((fstat(dev->fd, &buf) < 0) || (buf.st_rdev != dev->dev))) {
log_error("%s: fstat failed: Has device name changed?", name);
dev_close_immediate(dev);
return 0;
}
#ifndef O_DIRECT_SUPPORT
if (!(dev->flags & DEV_REGULAR))
dev_flush(dev);
#endif
if ((flags & O_CREAT) && !(flags & O_TRUNC))
dev->end = lseek(dev->fd, (off_t) 0, SEEK_END);
dm_list_add(&_open_devices, &dev->open_list);
log_debug_devs("Opened %s %s%s%s", dev_name(dev),
dev->flags & DEV_OPENED_RW ? "RW" : "RO",
dev->flags & DEV_OPENED_EXCL ? " O_EXCL" : "",
dev->flags & DEV_O_DIRECT ? " O_DIRECT" : "");
return 1;
}
