long compat_sys_fallocate(int fd, int mode,
u32 offset_lo, u32 offset_hi,
u32 len_lo, u32 len_hi)
{
return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
((loff_t)len_hi << 32) | len_lo);
}
COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode,
u32, offset_lo, u32, offset_hi,
u32, len_lo, u32, len_hi)
{
return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
((loff_t)len_hi << 32) | len_lo);
}
asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
u32 lenhi, u32 lenlo)
{
return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
((loff_t)lenhi << 32) | lenlo);
}
static int do_inflate(int fd, int mntn_type, off_t old_size, off_t *new_size, int *drop_state)
{
struct stat st;
int err;
*drop_state = 0;
switch (mntn_type) {
case PLOOP_MNTN_BALLOON:
break;
case PLOOP_MNTN_MERGE:
case PLOOP_MNTN_GROW:
case PLOOP_MNTN_TRACK:
ploop_err(0, "Can't inflate hidden balloon while another "
"maintenance operation is in progress (%s)",
mntn2str(mntn_type));
return(SYSEXIT_EBUSY);
case PLOOP_MNTN_FBLOADED:
case PLOOP_MNTN_RELOC:
ploop_err(0, "Can't inflate hidden balloon before previous "
"balloon operation (%s) is completed. Use "
"\"ploop-balloon complete\".", mntn2str(mntn_type));
return(SYSEXIT_EBUSY);
case PLOOP_MNTN_OFF:
ploop_err(0, "Error: mntn_type is PLOOP_MNTN_OFF after "
"IOC_BALLOON");
return(SYSEXIT_PROTOCOL);
default:
ploop_err(0, "Error: unknown mntn_type (%u)", mntn_type);
return(SYSEXIT_PROTOCOL);
}
err = sys_fallocate(fd, 0, 0, *new_size);
if (err)
ploop_err(errno, "Can't fallocate balloon");
if (fstat(fd, &st)) {
ploop_err(errno, "Can't stat balloon (2)");
if (ftruncate(fd, old_size))
ploop_err(errno, "Can't revert old_size back");
return(err ? SYSEXIT_FALLOCATE : SYSEXIT_FSTAT);
}
if (err) {
if (st.st_size != old_size) {
if (ftruncate(fd, old_size))
ploop_err(errno, "Can't revert old_size back (2)");
else
*drop_state = 1;
}
return(SYSEXIT_FALLOCATE);
}
if (st.st_size < *new_size) {
ploop_err(0, "Error: after fallocate(%d, 0, 0, %llu) fstat "
"reported size == %llu", fd,
(unsigned long long)*new_size, (unsigned long long)st.st_size);
if (ftruncate(fd, old_size))
ploop_err(errno, "Can't revert old_size back (3)");
else
*drop_state = 1;
return(SYSEXIT_FALLOCATE);
}
*new_size = st.st_size;
err = fsync_balloon(fd);
if (err)
return err;
ploop_log(0, "Successfully inflated balloon from %llu to %llu bytes",
(unsigned long long)old_size, (unsigned long long)*new_size);
return 0;
}
