/**
* nilfs_cpfile_delete_checkpoint -
* @cpfile:
* @cno:
*/
int nilfs_cpfile_delete_checkpoint(struct inode *cpfile, __u64 cno)
{
struct nilfs_cpinfo ci;
__u64 tcno = cno;
ssize_t nci;
nci = nilfs_cpfile_do_get_cpinfo(cpfile, &tcno, &ci, sizeof(ci), 1);
if (nci < 0)
return nci;
else if (nci == 0 || ci.ci_cno != cno)
return -ENOENT;
else if (nilfs_cpinfo_snapshot(&ci))
return -EBUSY;
return nilfs_cpfile_delete_checkpoints(cpfile, cno, cno + 1);
}
static void lscp_print_cpinfo(struct nilfs_cpinfo *cpinfo)
{
struct tm tm;
time_t t;
char timebuf[LSCP_BUFSIZE];
t = (time_t)cpinfo->ci_create;
localtime_r(&t, &tm);
strftime(timebuf, LSCP_BUFSIZE, "%F %T", &tm);
printf("%20llu %s %s %s %12llu %10llu\n",
(unsigned long long)cpinfo->ci_cno, timebuf,
nilfs_cpinfo_snapshot(cpinfo) ? "ss" : "cp",
nilfs_cpinfo_minor(cpinfo) ? "i" : "-",
(unsigned long long)(show_block_count ?
cpinfo->ci_blocks_count :
cpinfo->ci_nblk_inc),
(unsigned long long)cpinfo->ci_inodes_count);
}
static int lscp_search_snapshot(struct nilfs *nilfs,
struct nilfs_cpstat *cpstat, nilfs_cno_t *sidx)
{
nilfs_cno_t cno;
__u64 nreq;
ssize_t n, i;
for (cno = *sidx, nreq = 1; cno < cpstat->cs_cno;
cno += n, nreq = cpstat->cs_cno - cno) {
n = lscp_get_cpinfo(nilfs, cno, NILFS_CHECKPOINT, nreq);
if (n < 0)
return n;
if (!n)
break;
for (i = 0; i < n; i++) {
if (nilfs_cpinfo_snapshot(&cpinfos[i])) {
*sidx = cpinfos[i].ci_cno;
return 1;
}
}
}
return 0;
}
