1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5 */ 6 7 #ifndef __QUOTA_DOT_H__ 8 #define __QUOTA_DOT_H__ 9 10 #include <linux/list_lru.h> 11 12 struct gfs2_inode; 13 struct gfs2_sbd; 14 15 #define NO_UID_QUOTA_CHANGE INVALID_UID 16 #define NO_GID_QUOTA_CHANGE INVALID_GID 17 18 extern int gfs2_qa_get(struct gfs2_inode *ip); 19 extern void gfs2_qa_put(struct gfs2_inode *ip); 20 extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid); 21 extern void gfs2_quota_unhold(struct gfs2_inode *ip); 22 23 extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid); 24 extern void gfs2_quota_unlock(struct gfs2_inode *ip); 25 26 extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, 27 struct gfs2_alloc_parms *ap); 28 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change, 29 kuid_t uid, kgid_t gid); 30 31 extern int gfs2_quota_sync(struct super_block *sb, int type); 32 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid); 33 34 extern int gfs2_quota_init(struct gfs2_sbd *sdp); 35 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp); 36 extern int gfs2_quotad(void *data); 37 38 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp); 39 40 static inline int gfs2_quota_lock_check(struct gfs2_inode *ip, 41 struct gfs2_alloc_parms *ap) 42 { 43 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 44 int ret; 45 46 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ 47 if (capable(CAP_SYS_RESOURCE) || 48 sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) 49 return 0; 50 ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 51 if (ret) 52 return ret; 53 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON && 54 sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) 55 return 0; 56 ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap); 57 if (ret) 58 gfs2_quota_unlock(ip); 59 return ret; 60 } 61 62 extern const struct quotactl_ops gfs2_quotactl_ops; 63 extern struct shrinker gfs2_qd_shrinker; 64 extern struct list_lru gfs2_qd_lru; 65 extern void __init gfs2_quota_hash_init(void); 66 67 #endif /* __QUOTA_DOT_H__ */ 68