mdb_handle_t mdb_handle_add(mdb_handle_map_t *hmap, void *data)
{
int index;
MDB_CHECKARG(hmap && data, MDB_HANDLE_INVALID);
if ((index = freemap_alloc(&hmap->freemap)) == HANDLE_INDEX_INVALID) {
return MDB_HANDLE_INVALID;
}
return index_alloc(&hmap->indextbl, index, data);
}
int ploop_balloon_check_and_repair(const char *device, const char *mount_point, int repair)
{
int ret, fd = -1;
int balloonfd = -1;
__u32 n_free_blocks;
__u32 freezed_a_h;
__u32 dev_start; /* /sys/block/ploop0/ploop0p1/start */
struct ploop_balloon_ctl b_ctl;
struct stat st;
struct pfiemap *pfiemap = NULL;
struct freemap *freemap = NULL;
struct freemap *rangemap = NULL;
struct relocmap *relocmap = NULL;
struct ploop_freeblks_ctl *freeblks = NULL;
struct ploop_relocblks_ctl *relocblks= NULL;
char *msg = repair ? "repair" : "check";
__u32 *reverse_map = NULL;
__u32 reverse_map_len;
int top_level;
int entries_used;
struct delta delta = {};
int drop_state = 0;
ret = get_balloon(mount_point, &st, &balloonfd);
if (ret)
return ret;
if (st.st_size == 0) {
ploop_log(0, "Nothing to do: hidden balloon is empty");
close(balloonfd);
return 0;
}
pfiemap = fiemap_alloc(128);
freemap = freemap_alloc(128);
rangemap = freemap_alloc(128);
relocmap = relocmap_alloc(128);
if (!pfiemap || !freemap || !rangemap || !relocmap) {
ret = SYSEXIT_MALLOC;
goto err;
}
fd = open_device(device);
if (fd == -1) {
ret = SYSEXIT_OPEN;
goto err;
}
memset(&b_ctl, 0, sizeof(b_ctl));
/* block other maintenance ops even if we only check balloon */
b_ctl.inflate = 1;
ret = ioctl_device(fd, PLOOP_IOC_BALLOON, &b_ctl);
if (ret)
goto err;
switch (b_ctl.mntn_type) {
case PLOOP_MNTN_BALLOON:
drop_state = 1;
ret = open_top_delta(device, &delta, &top_level);
if (ret)
goto err;
reverse_map_len = delta.l2_size + delta.l2_size;
reverse_map = alloc_reverse_map(reverse_map_len);
if (reverse_map == NULL) {
ret = SYSEXIT_MALLOC;
goto err;
}
break;
case PLOOP_MNTN_MERGE:
case PLOOP_MNTN_GROW:
case PLOOP_MNTN_TRACK:
ploop_err(0, "Can't %s hidden balloon while another "
"maintenance operation is in progress (%s)",
msg, mntn2str(b_ctl.mntn_type));
ret = SYSEXIT_EBUSY;
goto err;
case PLOOP_MNTN_FBLOADED:
case PLOOP_MNTN_RELOC:
ploop_err(0, "Can't %s hidden balloon before previous "
"balloon operation (%s) is completed. Use "
"\"ploop-balloon complete\".",
msg, mntn2str(b_ctl.mntn_type));
ret = SYSEXIT_EBUSY;
goto err;
case PLOOP_MNTN_OFF:
ploop_err(0, "Error: mntn_type is PLOOP_MNTN_OFF after "
"IOC_BALLOON");
ret = SYSEXIT_PROTOCOL;
goto err;
default:
ploop_err(0, "Error: unknown mntn_type (%u)",
b_ctl.mntn_type);
ret = SYSEXIT_PROTOCOL;
goto err;
}
if (dev_num2dev_start(device, st.st_dev, &dev_start)) {
ploop_err(0, "Can't find out offset from start of ploop "
"device (%s) to start of partition where fs (%s) "
"resides", device, mount_point);
ret = SYSEXIT_SYSFS;
goto err;
}
ret = fiemap_get(balloonfd, S2B(dev_start), 0, st.st_size, &pfiemap);
if (ret)
goto err;
fiemap_adjust(pfiemap, delta.blocksize);
ret = fiemap_build_rmap(pfiemap, reverse_map, reverse_map_len, &delta);
if (ret)
goto err;
ret = rmap2freemap(reverse_map, 0, reverse_map_len, &freemap, &entries_used);
if (ret)
goto err;
if (entries_used == 0) {
ploop_log(0, "No free blocks found");
goto err;
}
ret = freemap2freeblks(freemap, top_level, &freeblks, &n_free_blocks);
if (ret)
goto err;
if (!repair) {
ploop_log(0, "Found %u free blocks. Consider using "
"\"ploop-balloon repair\"", n_free_blocks);
ret = 0;
goto err;
} else {
ploop_log(0, "Found %u free blocks", n_free_blocks);
}
ret = ioctl_device(fd, PLOOP_IOC_FREEBLKS, freeblks);
if (ret)
goto err;
drop_state = 0;
freezed_a_h = freeblks->alloc_head;
if (freezed_a_h > reverse_map_len) {
ploop_err(0, "Image corrupted: a_h=%u > rlen=%u",
freezed_a_h, reverse_map_len);
ret = SYSEXIT_PLOOPFMT;
goto err;
}
ret = range_build(freezed_a_h, n_free_blocks, reverse_map, reverse_map_len,
&delta, freemap, &rangemap, &relocmap);
if (ret)
goto err;
ret = relocmap2relocblks(relocmap, top_level, freezed_a_h, n_free_blocks,
&relocblks);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_RELOCBLKS, relocblks);
if (ret)
goto err;
ploop_log(0, "TRUNCATED: %u cluster-blocks (%llu bytes)",
relocblks->alloc_head,
(unsigned long long)(relocblks->alloc_head * S2B(delta.blocksize)));
err:
if (drop_state) {
memset(&b_ctl, 0, sizeof(b_ctl));
(void)ioctl_device(fd, PLOOP_IOC_BALLOON, &b_ctl);
}
// FIXME: close_delta()
if (balloonfd >= 0)
close(balloonfd);
if (fd >= 0)
close(fd);
free(pfiemap);
free(freemap);
free(rangemap);
free(relocmap);
free(reverse_map);
free(freeblks);
free(relocblks);
return ret;
}
static int ploop_balloon_relocation(int fd, struct ploop_balloon_ctl *b_ctl, const char *device)
{
int ret = -1;
__u32 n_free_blocks = 0;
__u32 freezed_a_h;
struct freemap *freemap = NULL;
struct freemap *rangemap = NULL;
struct relocmap *relocmap = NULL;
struct ploop_freeblks_ctl *freeblks = NULL;
struct ploop_relocblks_ctl *relocblks = NULL;;
__u32 *reverse_map = NULL;
__u32 reverse_map_len;
int top_level;
struct delta delta = {};
freemap = freemap_alloc(128);
rangemap = freemap_alloc(128);
relocmap = relocmap_alloc(128);
if (freemap == NULL || rangemap == NULL || relocmap == NULL) {
ret = SYSEXIT_MALLOC;
goto err;
}
top_level = b_ctl->level;
freezed_a_h = b_ctl->alloc_head;
if (b_ctl->mntn_type == PLOOP_MNTN_RELOC)
goto reloc;
if (b_ctl->mntn_type != PLOOP_MNTN_FBLOADED) {
ploop_err(0, "Error: non-suitable mntn_type (%u)",
b_ctl->mntn_type);
ret = SYSEXIT_PROTOCOL;
goto err;
}
ret = freeblks_alloc(&freeblks, 0);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_FBGET, freeblks);
if (ret)
goto err;
if (freeblks->n_extents == 0)
goto reloc;
ret = freeblks_alloc(&freeblks, freeblks->n_extents);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_FBGET, freeblks);
if (ret)
goto err;
ret = freeblks2freemap(freeblks, &freemap, &n_free_blocks);
if (ret)
goto err;
ret = open_top_delta(device, &delta, &top_level);
if (ret)
goto err;
reverse_map_len = delta.l2_size + delta.l2_size;
reverse_map = alloc_reverse_map(reverse_map_len);
if (reverse_map == NULL) {
close_delta(&delta);
ret = SYSEXIT_MALLOC;
goto err;
}
ret = range_build(freezed_a_h, n_free_blocks, reverse_map, reverse_map_len,
&delta, freemap, &rangemap, &relocmap);
close_delta(&delta);
if (ret)
goto err;
reloc:
ret = relocmap2relocblks(relocmap, top_level, freezed_a_h, n_free_blocks,
&relocblks);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_RELOCBLKS, relocblks);
if (ret)
goto err;
ploop_log(0, "TRUNCATED: %u cluster-blocks (%llu bytes)",
relocblks->alloc_head,
(unsigned long long)(relocblks->alloc_head * S2B(delta.blocksize)));
err:
free(freemap);
free(rangemap);
free(relocmap);
free(reverse_map);
free(freeblks);
free(relocblks);
return ret;
}
int ploop_balloon_change_size(const char *device, int balloonfd, off_t new_size)
{
int fd = -1;
int ret;
off_t old_size;
__u32 dev_start; /* /sys/block/ploop0/ploop0p1/start */
__u32 n_free_blocks;
__u32 freezed_a_h;
struct ploop_balloon_ctl b_ctl;
struct stat st;
struct pfiemap *pfiemap = NULL;
struct freemap *freemap = NULL;
struct freemap *rangemap = NULL;
struct relocmap *relocmap = NULL;
struct ploop_freeblks_ctl *freeblks = NULL;
struct ploop_relocblks_ctl *relocblks = NULL;
__u32 *reverse_map = NULL;
__u32 reverse_map_len;
int top_level;
struct delta delta = { .fd = -1 };
int entries_used;
int drop_state = 0;
if (fstat(balloonfd, &st)) {
ploop_err(errno, "Can't get balloon file size");
return SYSEXIT_FSTAT;
}
old_size = st.st_size;
new_size = (S2B(new_size) + st.st_blksize - 1) & ~(st.st_blksize - 1);
ploop_log(0, "Changing balloon size old_size=%ld new_size=%ld",
(long)old_size, (long)new_size);
pfiemap = fiemap_alloc(128);
freemap = freemap_alloc(128);
rangemap = freemap_alloc(128);
relocmap = relocmap_alloc(128);
if (!pfiemap || !freemap || !rangemap || !relocmap) {
ret = SYSEXIT_MALLOC;
goto err;
}
fd = open_device(device);
if (fd == -1) {
ret = SYSEXIT_OPEN;
goto err;
}
memset(&b_ctl, 0, sizeof(b_ctl));
if (old_size < new_size)
b_ctl.inflate = 1;
ret = ioctl_device(fd, PLOOP_IOC_BALLOON, &b_ctl);
if (ret)
goto err;
drop_state = 1;
if (old_size >= new_size) {
ret = do_truncate(balloonfd, b_ctl.mntn_type, old_size, new_size);
goto err;
}
if (dev_num2dev_start(device, st.st_dev, &dev_start)) {
ploop_err(0, "Can't find out offset from start of ploop "
"device (%s) to start of partition",
device);
ret = SYSEXIT_SYSFS;
goto err;
}
ret = open_top_delta(device, &delta, &top_level);
if (ret)
goto err;
ret = do_inflate(balloonfd, b_ctl.mntn_type, old_size, &new_size, &drop_state);
if (ret)
goto err;
reverse_map_len = delta.l2_size + delta.l2_size;
reverse_map = alloc_reverse_map(reverse_map_len);
if (reverse_map == NULL) {
ret = SYSEXIT_MALLOC;
goto err;
}
ret = fiemap_get(balloonfd, S2B(dev_start), old_size, new_size, &pfiemap);
if (ret)
goto err;
fiemap_adjust(pfiemap, delta.blocksize);
ret = fiemap_build_rmap(pfiemap, reverse_map, reverse_map_len, &delta);
if (ret)
goto err;
ret = rmap2freemap(reverse_map, 0, reverse_map_len, &freemap, &entries_used);
if (ret)
goto err;
if (entries_used == 0) {
drop_state = 1;
ploop_log(0, "No unused cluster blocks found");
goto out;
}
ret = freemap2freeblks(freemap, top_level, &freeblks, &n_free_blocks);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_FREEBLKS, freeblks);
if (ret)
goto err;
freezed_a_h = freeblks->alloc_head;
if (freezed_a_h > reverse_map_len) {
ploop_err(0, "Image corrupted: a_h=%u > rlen=%u",
freezed_a_h, reverse_map_len);
ret = SYSEXIT_PLOOPFMT;
goto err;
}
ret = range_build(freezed_a_h, n_free_blocks, reverse_map, reverse_map_len,
&delta, freemap, &rangemap, &relocmap);
if (ret)
goto err;
ret = relocmap2relocblks(relocmap, top_level, freezed_a_h, n_free_blocks,
&relocblks);
if (ret)
goto err;
ret = ioctl_device(fd, PLOOP_IOC_RELOCBLKS, relocblks);
if (ret)
goto err;
ploop_log(0, "TRUNCATED: %u cluster-blocks (%llu bytes)",
relocblks->alloc_head,
(unsigned long long)(relocblks->alloc_head * S2B(delta.blocksize)));
out:
ret = 0;
err:
if (drop_state) {
memset(&b_ctl, 0, sizeof(b_ctl));
(void)ioctl_device(fd, PLOOP_IOC_BALLOON, &b_ctl);
}
if (fd != -1)
close(fd);
free(pfiemap);
free(freemap);
free(rangemap);
free(relocmap);
free(reverse_map);
free(freeblks);
free(relocblks);
if (delta.fd != -1)
close_delta(&delta);
return ret;
}
int ploop_balloon_get_state(const char *device, __u32 *state)
{
int fd, ret;
struct ploop_balloon_ctl b_ctl;
fd = open_device(device);
if (fd == -1)
return SYSEXIT_OPEN;
bzero(&b_ctl, sizeof(b_ctl));
b_ctl.keep_intact = 1;
ret = ioctl_device(fd, PLOOP_IOC_BALLOON, &b_ctl);
if (ret)
goto err;
*state = b_ctl.mntn_type;
err:
close(fd);
return ret;
}
