On Wed, 2022-04-27 at 15:33 +0100, Luís Henriques wrote: > When doing a mount using as base a directory that has 'max_bytes' quotas > statfs uses that value as the total; if a subdirectory is used instead, > the same 'max_bytes' too in statfs, unless there is another quota set. > > Unfortunately, if this subdirectory only has the 'max_files' quota set, > then statfs uses the filesystem total. Fix this by making sure we only > lookup realms that contain the 'max_bytes' quota. > > Link: https://tracker.ceph.com/issues/55090 > Cc: Ryan Taylor <rptaylor@xxxxxxx> > Signed-off-by: Luís Henriques <lhenriques@xxxxxxx> > --- > As I mentioned in v1, I do *not* think this really fixes the tracker > above, as the bug reporter never mentioned setting quotas in the subdir. > > Changes since v1: > Moved some more logic into __ceph_has_any_quota() function. > > fs/ceph/inode.c | 2 +- > fs/ceph/quota.c | 19 +++++++++++-------- > fs/ceph/super.h | 28 ++++++++++++++++++++++++---- > 3 files changed, 36 insertions(+), 13 deletions(-) > > diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c > index 5de7bb9048b7..4b7406d6fbe4 100644 > --- a/fs/ceph/inode.c > +++ b/fs/ceph/inode.c > @@ -691,7 +691,7 @@ void ceph_evict_inode(struct inode *inode) > > __ceph_remove_caps(ci); > > - if (__ceph_has_any_quota(ci)) > + if (__ceph_has_any_quota(ci, QUOTA_GET_ANY)) > ceph_adjust_quota_realms_count(inode, false); > > /* > diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c > index a338a3ec0dc4..e9f7ca18cdb7 100644 > --- a/fs/ceph/quota.c > +++ b/fs/ceph/quota.c > @@ -195,9 +195,9 @@ void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc) > > /* > * This function walks through the snaprealm for an inode and returns the > - * ceph_snap_realm for the first snaprealm that has quotas set (either max_files > - * or max_bytes). If the root is reached, return the root ceph_snap_realm > - * instead. > + * ceph_snap_realm for the first snaprealm that has quotas set (max_files, > + * max_bytes, or any, depending on the 'which_quota' argument). If the root is > + * reached, return the root ceph_snap_realm instead. > * > * Note that the caller is responsible for calling ceph_put_snap_realm() on the > * returned realm. > @@ -209,7 +209,9 @@ void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc) > * will be restarted. > */ > static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, > - struct inode *inode, bool retry) > + struct inode *inode, > + enum quota_get_realm which_quota, > + bool retry) > { > struct ceph_inode_info *ci = NULL; > struct ceph_snap_realm *realm, *next; > @@ -248,7 +250,7 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, > } > > ci = ceph_inode(in); > - has_quota = __ceph_has_any_quota(ci); > + has_quota = __ceph_has_any_quota(ci, which_quota); > iput(in); > > next = realm->parent; > @@ -279,8 +281,8 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) > * dropped and we can then restart the whole operation. > */ > down_read(&mdsc->snap_rwsem); > - old_realm = get_quota_realm(mdsc, old, true); > - new_realm = get_quota_realm(mdsc, new, false); > + old_realm = get_quota_realm(mdsc, old, QUOTA_GET_ANY, true); > + new_realm = get_quota_realm(mdsc, new, QUOTA_GET_ANY, false); > if (PTR_ERR(new_realm) == -EAGAIN) { > up_read(&mdsc->snap_rwsem); > if (old_realm) > @@ -483,7 +485,8 @@ bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, struct kstatfs *buf) > bool is_updated = false; > > down_read(&mdsc->snap_rwsem); > - realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root), true); > + realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root), > + QUOTA_GET_MAX_BYTES, true); > up_read(&mdsc->snap_rwsem); > if (!realm) > return false; > diff --git a/fs/ceph/super.h b/fs/ceph/super.h > index a2e1c83ab29a..3cd96720f14a 100644 > --- a/fs/ceph/super.h > +++ b/fs/ceph/super.h > @@ -1317,9 +1317,29 @@ extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); > extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); > > /* quota.c */ > -static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) > + > +enum quota_get_realm { > + QUOTA_GET_MAX_FILES, > + QUOTA_GET_MAX_BYTES, > + QUOTA_GET_ANY > +}; > + > +static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci, > + enum quota_get_realm which) > { > - return ci->i_max_files || ci->i_max_bytes; > + bool has_quota = false; > + > + switch (which) { > + case QUOTA_GET_MAX_BYTES: > + has_quota = !!ci->i_max_bytes; > + break; > + case QUOTA_GET_MAX_FILES: > + has_quota = !!ci->i_max_files; > + break; > + default: > + has_quota = !!(ci->i_max_files || ci->i_max_bytes); > + } > + return has_quota; > } > > extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); > @@ -1328,10 +1348,10 @@ static inline void __ceph_update_quota(struct ceph_inode_info *ci, > u64 max_bytes, u64 max_files) > { > bool had_quota, has_quota; > - had_quota = __ceph_has_any_quota(ci); > + had_quota = __ceph_has_any_quota(ci, QUOTA_GET_ANY); > ci->i_max_bytes = max_bytes; > ci->i_max_files = max_files; > - has_quota = __ceph_has_any_quota(ci); > + has_quota = __ceph_has_any_quota(ci, QUOTA_GET_ANY); > > if (had_quota != has_quota) > ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); Code looks fine. I think Xiubo had suggested renaming the funtion to __ceph_has_quota(), but other than that this looks good. Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
