Commit | Line | Data |
---|---|---|
b11be056 | 1 | /* quota.h 6.1 83/07/29 */ |
187ee005 RE |
2 | |
3 | /* | |
95222a8a | 4 | * MELBOURNE DISC QUOTAS |
187ee005 | 5 | * |
95222a8a SL |
6 | * Various junk to do with various quotas (etc) imposed upon |
7 | * the average user (big brother finally hits UNIX). | |
187ee005 | 8 | * |
95222a8a SL |
9 | * The following structure exists in core for each logged on user. |
10 | * It contains global junk relevant to that user's quotas. | |
11 | * | |
12 | * The u_quota field of each user struct contains a pointer to | |
13 | * the quota struct relevant to the current process, this is changed | |
14 | * by 'setuid' sys call, &/or by the Q_SETUID quota() call. | |
187ee005 | 15 | */ |
187ee005 | 16 | struct quota { |
a9abb9eb | 17 | struct quota *q_forw, *q_back; /* hash chain, MUST be first */ |
187ee005 RE |
18 | short q_cnt; /* ref count (# processes) */ |
19 | short q_uid; /* real uid of owner */ | |
95222a8a | 20 | int q_flags; /* struct management flags */ |
a9abb9eb SL |
21 | #define Q_LOCK 0x01 /* quota struct locked (for disc i/o) */ |
22 | #define Q_WANT 0x02 /* issue a wakeup when lock goes off */ | |
23 | #define Q_NEW 0x04 /* new quota - no proc1 msg sent yet */ | |
24 | #define Q_NDQ 0x08 /* account has NO disc quota */ | |
25 | struct quota *q_freef, **q_freeb; | |
187ee005 RE |
26 | struct dquot *q_dq[NMOUNT]; /* disc quotas for mounted filesys's */ |
27 | }; | |
187ee005 | 28 | |
95222a8a SL |
29 | #define NOQUOTA ((struct quota *) 0) |
30 | ||
54cc5e32 | 31 | #if defined(KERNEL) && defined(QUOTA) |
a9abb9eb | 32 | struct quota *quota, *quotaNQUOTA; |
187ee005 | 33 | int nquota; |
a9abb9eb | 34 | struct quota *getquota(), *qfind(); |
187ee005 RE |
35 | #endif |
36 | ||
187ee005 | 37 | /* |
95222a8a SL |
38 | * The following structure defines the format of the disc quota file |
39 | * (as it appears on disc) - the file is an array of these structures | |
40 | * indexed by user number. The setquota sys call establishes the inode | |
41 | * for each quota file (a pointer is retained in the mount structure). | |
187ee005 | 42 | * |
95222a8a SL |
43 | * The following constants define the number of warnings given a user |
44 | * before the soft limits are treated as hard limits (usually resulting | |
45 | * in an allocation failure). The warnings are normally manipulated | |
46 | * each time a user logs in through the Q_DOWARN quota call. If | |
47 | * the user logs in and is under the soft limit the warning count | |
48 | * is reset to MAX_*_WARN, otherwise a message is printed and the | |
49 | * warning count is decremented. This makes MAX_*_WARN equivalent to | |
50 | * the number of logins before soft limits are treated as hard limits. | |
187ee005 | 51 | */ |
a9abb9eb | 52 | #define MAX_IQ_WARN 3 |
187ee005 | 53 | #define MAX_DQ_WARN 3 |
95222a8a SL |
54 | |
55 | struct dqblk { | |
56 | u_long dqb_bhardlimit; /* absolute limit on disc blks alloc */ | |
57 | u_long dqb_bsoftlimit; /* preferred limit on disc blks */ | |
58 | u_long dqb_curblocks; /* current block count */ | |
59 | u_short dqb_ihardlimit; /* maximum # allocated inodes + 1 */ | |
60 | u_short dqb_isoftlimit; /* preferred inode limit */ | |
61 | u_short dqb_curinodes; /* current # allocated inodes */ | |
62 | u_char dqb_bwarn; /* # warnings left about excessive disc use */ | |
63 | u_char dqb_iwarn; /* # warnings left about excessive inodes */ | |
a9abb9eb | 64 | }; |
187ee005 RE |
65 | |
66 | /* | |
95222a8a SL |
67 | * The following structure records disc usage for a user on a filesystem. |
68 | * There is one allocated for each quota that exists on any filesystem | |
69 | * for the current user. A cache is kept of other recently used entries. | |
187ee005 | 70 | */ |
187ee005 | 71 | struct dquot { |
a9abb9eb | 72 | struct dquot *dq_forw, *dq_back;/* MUST be first entry */ |
187ee005 | 73 | union { |
a9abb9eb SL |
74 | struct quota *Dq_own; /* the quota that points to this */ |
75 | struct { /* free list */ | |
76 | struct dquot *Dq_freef, **Dq_freeb; | |
187ee005 RE |
77 | } dq_f; |
78 | } dq_u; | |
95222a8a | 79 | short dq_flags; |
a9abb9eb SL |
80 | #define DQ_LOCK 0x01 /* this quota locked (no MODS) */ |
81 | #define DQ_WANT 0x02 /* wakeup on unlock */ | |
82 | #define DQ_MOD 0x04 /* this quota modified since read */ | |
83 | #define DQ_FAKE 0x08 /* no limits here, just usage */ | |
84 | #define DQ_BLKS 0x10 /* has been warned about blk limit */ | |
85 | #define DQ_INODS 0x20 /* has been warned about inode limit */ | |
187ee005 RE |
86 | short dq_cnt; /* count of active references */ |
87 | short dq_uid; /* user this applies to */ | |
88 | dev_t dq_dev; /* filesystem this relates to */ | |
89 | struct dqblk dq_dqb; /* actual usage & quotas */ | |
90 | }; | |
d6185698 | 91 | |
187ee005 RE |
92 | #define dq_own dq_u.Dq_own |
93 | #define dq_freef dq_u.dq_f.Dq_freef | |
94 | #define dq_freeb dq_u.dq_f.Dq_freeb | |
95222a8a SL |
95 | #define dq_bhardlimit dq_dqb.dqb_bhardlimit |
96 | #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit | |
97 | #define dq_curblocks dq_dqb.dqb_curblocks | |
98 | #define dq_ihardlimit dq_dqb.dqb_ihardlimit | |
99 | #define dq_isoftlimit dq_dqb.dqb_isoftlimit | |
100 | #define dq_curinodes dq_dqb.dqb_curinodes | |
101 | #define dq_bwarn dq_dqb.dqb_bwarn | |
187ee005 | 102 | #define dq_iwarn dq_dqb.dqb_iwarn |
95222a8a | 103 | |
187ee005 RE |
104 | #define NODQUOT ((struct dquot *) 0) |
105 | #define LOSTDQUOT ((struct dquot *) 1) | |
106 | ||
54cc5e32 | 107 | #if defined(KERNEL) && defined(QUOTA) |
a9abb9eb | 108 | struct dquot *dquot, *dquotNDQUOT; |
187ee005 | 109 | int ndquot; |
a9abb9eb | 110 | struct dquot *discquota(), *inoquota(), *dqalloc(), *dqp(); |
187ee005 RE |
111 | #endif |
112 | ||
187ee005 | 113 | /* |
95222a8a | 114 | * Definitions for the 'quota' system call. |
187ee005 RE |
115 | */ |
116 | #define Q_SETDLIM 1 /* set disc limits & usage */ | |
117 | #define Q_GETDLIM 2 /* get disc limits & usage */ | |
118 | #define Q_SETDUSE 3 /* set disc usage only */ | |
95222a8a | 119 | #define Q_SYNC 4 /* update disc copy of quota usages */ |
187ee005 | 120 | #define Q_SETUID 16 /* change proc to use quotas for uid */ |
187ee005 RE |
121 | #define Q_SETWARN 25 /* alter inode/block warning counts */ |
122 | #define Q_DOWARN 26 /* warn user about excessive space/inodes */ | |
95222a8a SL |
123 | |
124 | /* | |
125 | * Used in Q_SETDUSE. | |
126 | */ | |
127 | struct dqusage { | |
128 | u_short du_curinodes; | |
129 | u_long du_curblocks; | |
130 | }; | |
131 | ||
132 | /* | |
133 | * Used in Q_SETWARN. | |
134 | */ | |
135 | struct dqwarn { | |
136 | u_char dw_bwarn; | |
137 | u_char dw_iwarn; | |
138 | }; |