[PATCH 04/12] container quota: introduce container disk quota data header file.
From: <hidden>
Date: 2012-05-30 14:58:58
Header file for container disk quota. Signed-off-by: Jie Liu <redacted> --- fs/ns_quota.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 84 insertions(+), 0 deletions(-) create mode 100644 fs/ns_quota.h
diff --git a/fs/ns_quota.h b/fs/ns_quota.h
new file mode 100644
index 0000000..cf90fff
--- /dev/null
+++ b/fs/ns_quota.h@@ -0,0 +1,84 @@ +#ifndef _LINUX_NS_QUOTA_ +#define _LINUX_NS_QUOTA_ + +#include <linux/types.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/rwsem.h> +#include <linux/spinlock.h> +#include <linux/atomic.h> +#include <linux/quota.h> +#include <linux/user_namespace.h> + +#define NS_MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */ +#define NS_MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */ + +/* + * Below most stuff were copied from kernel/user.c, using them + * to calculate and define quota hash table and hash routine. + */ +#define NS_DQHASH_BITS (CONFIG_BASE_SMALL ? 3 : 7) +#define NS_DQHASH_SZ (1 << NS_DQHASH_BITS) + +struct ns_mem_dqinfo { + unsigned long dqi_flags; + unsigned int dqi_bgrace; + unsigned int dqi_igrace; + qsize_t dqi_maxblimit; + qsize_t dqi_maxilimit; +}; + +/* Mount namespace disk quota definitation */ +struct ns_quota_info { + /* Flags for disk quotas on this mount namespace */ + unsigned int dq_flags; + /* Serialize mount namespace quotaon & quotaoff */ + struct mutex dqonoff_mutex; + /* Serialize user/group quota list operations */ + spinlock_t dq_list_lock; + /* Serialize quota value incr/decr operations */ + spinlock_t dq_data_lock; + struct kmem_cache *dquot_cachep; + /* Hash list of all user disk quotas */ + struct hlist_head u_dquots[NS_DQHASH_SZ]; + /* Hash list of all group disk quotas */ + struct hlist_head g_dquots[NS_DQHASH_SZ]; + /* Information for each quota type */ + struct ns_mem_dqinfo dqinfo[MAXQUOTAS]; +}; + +/* Mount namespace disk quota object */ +struct ns_dquot { + struct hlist_node dq_hash_node; /* Hash list in memory */ + struct mnt_namespace *dq_ns; /* Mount namespace this applies to */ + unsigned int dq_id; /* ID this applies to (uid, gid) */ + unsigned long dq_flags; /* See DQ_* */ + short dq_type; /* Type of quota */ + struct mem_dqblk dq_dqb; /* Diskquota usage */ +}; + +/* Operations for quota object allocation/destroy */ +struct ns_dquot_ops { + /* Allocate memory for new dqout object */ + struct ns_dquot *(*alloc_dquot)(struct mnt_namespace *); + /* Free memory for dquot */ + void (*destroy_dquot)(struct ns_dquot *); +}; + +/* Operations for quota control */ +struct ns_quotactl_ops { + int (*quota_on)(struct mnt_namespace *, int); + int (*quota_off)(struct mnt_namespace *, int); + int (*get_info)(struct mnt_namespace *, int, struct if_dqinfo *); + int (*set_info)(struct mnt_namespace *, int, struct if_dqinfo *); + int (*get_dqblk)(struct mnt_namespace *, int, qid_t, + struct fs_disk_quota *); + int (*set_dqblk)(struct mnt_namespace *, int, qid_t, + struct fs_disk_quota *); +}; + +int ns_dqinfo_init(struct mnt_namespace *ns); +void ns_dqinfo_destroy(struct mnt_namespace *ns); +extern unsigned int ns_dquot_getfmt(struct mnt_namespace *ns, int type); + +#endif /* _LINUX_NS_QUOTA_ */
--
1.7.9