diff options
| author | Lukas Czerner <lczerner@redhat.com> | 2023-07-25 16:45:09 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2023-08-09 09:15:40 +0200 |
| commit | de4c0e7ca8b526a82ff7e5ee5533787bb6d01724 (patch) | |
| tree | 3becafa0f5ce6e50ff6a35703c961236c22630b3 /mm/shmem_quota.c | |
| parent | e09764cff44b5d31c2ca5477444565e3080637d2 (diff) | |
shmem: Add default quota limit mount options
Allow system administrator to set default global quota limits at tmpfs
mount time.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Message-Id: <20230725144510.253763-7-cem@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'mm/shmem_quota.c')
| -rw-r--r-- | mm/shmem_quota.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/mm/shmem_quota.c b/mm/shmem_quota.c index e92b8ece9880..062d1c1097ae 100644 --- a/mm/shmem_quota.c +++ b/mm/shmem_quota.c @@ -166,6 +166,7 @@ static int shmem_acquire_dquot(struct dquot *dquot) { struct mem_dqinfo *info = sb_dqinfo(dquot->dq_sb, dquot->dq_id.type); struct rb_node **n = &((struct rb_root *)info->dqi_priv)->rb_node; + struct shmem_sb_info *sbinfo = dquot->dq_sb->s_fs_info; struct rb_node *parent = NULL, *new_node = NULL; struct quota_id *new_entry, *entry; qid_t id = from_kqid(&init_user_ns, dquot->dq_id); @@ -195,6 +196,14 @@ static int shmem_acquire_dquot(struct dquot *dquot) } new_entry->id = id; + if (dquot->dq_id.type == USRQUOTA) { + new_entry->bhardlimit = sbinfo->qlimits.usrquota_bhardlimit; + new_entry->ihardlimit = sbinfo->qlimits.usrquota_ihardlimit; + } else if (dquot->dq_id.type == GRPQUOTA) { + new_entry->bhardlimit = sbinfo->qlimits.grpquota_bhardlimit; + new_entry->ihardlimit = sbinfo->qlimits.grpquota_ihardlimit; + } + new_node = &new_entry->node; rb_link_node(new_node, parent, n); rb_insert_color(new_node, (struct rb_root *)info->dqi_priv); @@ -224,6 +233,29 @@ out_unlock: return ret; } +static bool shmem_is_empty_dquot(struct dquot *dquot) +{ + struct shmem_sb_info *sbinfo = dquot->dq_sb->s_fs_info; + qsize_t bhardlimit; + qsize_t ihardlimit; + + if (dquot->dq_id.type == USRQUOTA) { + bhardlimit = sbinfo->qlimits.usrquota_bhardlimit; + ihardlimit = sbinfo->qlimits.usrquota_ihardlimit; + } else if (dquot->dq_id.type == GRPQUOTA) { + bhardlimit = sbinfo->qlimits.grpquota_bhardlimit; + ihardlimit = sbinfo->qlimits.grpquota_ihardlimit; + } + + if (test_bit(DQ_FAKE_B, &dquot->dq_flags) || + (dquot->dq_dqb.dqb_curspace == 0 && + dquot->dq_dqb.dqb_curinodes == 0 && + dquot->dq_dqb.dqb_bhardlimit == bhardlimit && + dquot->dq_dqb.dqb_ihardlimit == ihardlimit)) + return true; + + return false; +} /* * Store limits from dquot in the tree unless it's fake. If it is fake * remove the id from the tree since there is no useful information in @@ -261,7 +293,7 @@ static int shmem_release_dquot(struct dquot *dquot) return -ENOENT; found: - if (test_bit(DQ_FAKE_B, &dquot->dq_flags)) { + if (shmem_is_empty_dquot(dquot)) { /* Remove entry from the tree */ rb_erase(&entry->node, info->dqi_priv); kfree(entry); |