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ceph: quota: report root dir quota usage in statfs

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This commit changes statfs default behaviour when reporting usage
statistics.  Instead of using the overall filesystem usage, statfs now
reports the quota for the filesystem root, if ceph.quota.max_bytes has
been set for this inode.  If quota hasn't been set, it falls back to the
old statfs behaviour.

A new mount option is also added ('noquotadf') to disable this behaviour.

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Luis Henriques
2018-01-31 10:53:13 +00:00
committed by Ilya Dryomov
parent d557c48db7
commit 9122eed528
4 changed files with 87 additions and 3 deletions
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27
fs/ceph/super.c
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@@ -76,9 +76,18 @@ static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
*/
buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
/*
* By default use root quota for stats; fallback to overall filesystem
* usage if using 'noquotadf' mount option or if the root dir doesn't
* have max_bytes quota set.
*/
if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
!ceph_quota_update_statfs(fsc, buf)) {
buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
}
buf->f_files = le64_to_cpu(st.num_objects);
buf->f_ffree = -1;
@@ -151,6 +160,8 @@ enum {
Opt_acl,
#endif
Opt_noacl,
Opt_quotadf,
Opt_noquotadf,
};
static match_table_t fsopt_tokens = {
@@ -187,6 +198,8 @@ static match_table_t fsopt_tokens = {
{Opt_acl, "acl"},
#endif
{Opt_noacl, "noacl"},
{Opt_quotadf, "quotadf"},
{Opt_noquotadf, "noquotadf"},
{-1, NULL}
};
@@ -334,6 +347,12 @@ static int parse_fsopt_token(char *c, void *private)
case Opt_norequire_active_mds:
fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
break;
case Opt_quotadf:
fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF;
break;
case Opt_noquotadf:
fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF;
break;
#ifdef CONFIG_CEPH_FS_POSIX_ACL
case Opt_acl:
fsopt->sb_flags |= SB_POSIXACL;
@@ -520,6 +539,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
}
if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM)
seq_puts(m, ",nopoolperm");
if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF)
seq_puts(m, ",noquotadf");
#ifdef CONFIG_CEPH_FS_POSIX_ACL
if (fsopt->sb_flags & SB_POSIXACL)