Commit | Line | Data |
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da7c5cc6 | 1 | /* |
c4ec2128 | 2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
be555728 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
da7c5cc6 | 5 | * |
be555728 | 6 | * @(#)kern_acct.c 7.7 (Berkeley) %G% |
da7c5cc6 | 7 | */ |
06138e31 | 8 | |
94368568 JB |
9 | #include "param.h" |
10 | #include "systm.h" | |
556dc220 MK |
11 | #include "time.h" |
12 | #include "proc.h" | |
94368568 | 13 | #include "user.h" |
c4ec2128 KM |
14 | #include "vnode.h" |
15 | #include "mount.h" | |
94368568 JB |
16 | #include "kernel.h" |
17 | #include "acct.h" | |
18 | #include "uio.h" | |
c4ec2128 KM |
19 | #include "syslog.h" |
20 | ||
21 | /* | |
22 | * Values associated with enabling and disabling accounting | |
23 | */ | |
24 | int acctsuspend = 2; /* stop accounting when < 2% free space left */ | |
25 | int acctresume = 4; /* resume when free space risen to > 4% */ | |
26 | struct timeval chk = { 15, 0 };/* frequency to check space for accounting */ | |
06138e31 SL |
27 | |
28 | /* | |
29 | * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY. | |
30 | */ | |
c4ec2128 KM |
31 | struct vnode *acctp; |
32 | struct vnode *savacctp; | |
06138e31 SL |
33 | |
34 | /* | |
35 | * Perform process accounting functions. | |
36 | */ | |
37 | sysacct() | |
38 | { | |
c4ec2128 | 39 | register struct vnode *vp; |
06138e31 SL |
40 | register struct a { |
41 | char *fname; | |
42 | } *uap = (struct a *)u.u_ap; | |
715baff1 | 43 | register struct nameidata *ndp = &u.u_nd; |
c4ec2128 KM |
44 | extern int acctwatch(); |
45 | struct vnode *oacctp; | |
06138e31 | 46 | |
849cbd39 KM |
47 | if (u.u_error = suser(u.u_cred, &u.u_acflag)) |
48 | return; | |
49 | if (savacctp) { | |
50 | acctp = savacctp; | |
51 | savacctp = NULL; | |
52 | } | |
53 | if (uap->fname==NULL) { | |
c4ec2128 | 54 | if (vp = acctp) { |
849cbd39 | 55 | acctp = NULL; |
c4ec2128 KM |
56 | vrele(vp); |
57 | untimeout(acctwatch, (caddr_t)&chk); | |
dbba2129 | 58 | } |
849cbd39 KM |
59 | return; |
60 | } | |
61 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
62 | ndp->ni_segflg = UIO_USERSPACE; | |
63 | ndp->ni_dirp = uap->fname; | |
c4ec2128 | 64 | if (u.u_error = namei(ndp)) |
849cbd39 | 65 | return; |
c4ec2128 KM |
66 | vp = ndp->ni_vp; |
67 | if (vp->v_type != VREG) { | |
849cbd39 | 68 | u.u_error = EACCES; |
c4ec2128 | 69 | vrele(vp); |
849cbd39 KM |
70 | return; |
71 | } | |
c4ec2128 | 72 | if (vp->v_mount->m_flag & M_RDONLY) { |
849cbd39 | 73 | u.u_error = EROFS; |
c4ec2128 | 74 | vrele(vp); |
849cbd39 | 75 | return; |
06138e31 | 76 | } |
c4ec2128 KM |
77 | oacctp = acctp; |
78 | acctp = vp; | |
79 | if (oacctp) | |
80 | vrele(oacctp); | |
81 | acctwatch(&chk); | |
06138e31 SL |
82 | } |
83 | ||
06138e31 | 84 | /* |
c4ec2128 KM |
85 | * Periodically check the file system to see if accounting |
86 | * should be turned on or off. | |
06138e31 | 87 | */ |
c4ec2128 KM |
88 | acctwatch(resettime) |
89 | struct timeval *resettime; | |
06138e31 | 90 | { |
c4ec2128 | 91 | struct statfs sb; |
06138e31 SL |
92 | |
93 | if (savacctp) { | |
c4ec2128 KM |
94 | (void)VFS_STATFS(savacctp->v_mount, &sb); |
95 | if (sb.f_bavail > acctresume * sb.f_blocks / 100) { | |
06138e31 SL |
96 | acctp = savacctp; |
97 | savacctp = NULL; | |
c4ec2128 KM |
98 | log(LOG_NOTICE, "Accounting resumed\n"); |
99 | return; | |
06138e31 SL |
100 | } |
101 | } | |
c4ec2128 | 102 | if (acctp == NULL) |
06138e31 | 103 | return; |
c4ec2128 KM |
104 | (void)VFS_STATFS(acctp->v_mount, &sb); |
105 | if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) { | |
06138e31 SL |
106 | savacctp = acctp; |
107 | acctp = NULL; | |
c4ec2128 | 108 | log(LOG_NOTICE, "Accounting suspended\n"); |
06138e31 | 109 | } |
c4ec2128 KM |
110 | timeout(acctwatch, (caddr_t)resettime, hzto(resettime)); |
111 | } | |
112 | ||
113 | /* | |
114 | * On exit, write a record on the accounting file. | |
115 | */ | |
116 | acct() | |
117 | { | |
118 | register struct rusage *ru; | |
119 | struct vnode *vp; | |
120 | struct timeval t; | |
121 | int i; | |
122 | struct acct acctbuf; | |
123 | register struct acct *ap = &acctbuf; | |
124 | ||
125 | if ((vp = acctp) == NULL) | |
126 | return; | |
9fa0dc60 | 127 | bcopy(u.u_comm, ap->ac_comm, sizeof(ap->ac_comm)); |
032146e9 SL |
128 | ru = &u.u_ru; |
129 | ap->ac_utime = compress(ru->ru_utime.tv_sec, ru->ru_utime.tv_usec); | |
130 | ap->ac_stime = compress(ru->ru_stime.tv_sec, ru->ru_stime.tv_usec); | |
131 | t = time; | |
132 | timevalsub(&t, &u.u_start); | |
133 | ap->ac_etime = compress(t.tv_sec, t.tv_usec); | |
134 | ap->ac_btime = u.u_start.tv_sec; | |
556dc220 MK |
135 | ap->ac_uid = u.u_procp->p_ruid; |
136 | ap->ac_gid = u.u_procp->p_rgid; | |
032146e9 SL |
137 | t = ru->ru_stime; |
138 | timevaladd(&t, &ru->ru_utime); | |
350f5463 | 139 | if (i = t.tv_sec * hz + t.tv_usec / tick) |
032146e9 SL |
140 | ap->ac_mem = (ru->ru_ixrss+ru->ru_idrss+ru->ru_isrss) / i; |
141 | else | |
142 | ap->ac_mem = 0; | |
143 | ap->ac_mem >>= CLSIZELOG2; | |
01b0e233 | 144 | ap->ac_io = compress(ru->ru_inblock + ru->ru_oublock, (long)0); |
06138e31 SL |
145 | if (u.u_ttyp) |
146 | ap->ac_tty = u.u_ttyd; | |
147 | else | |
148 | ap->ac_tty = NODEV; | |
149 | ap->ac_flag = u.u_acflag; | |
c4ec2128 KM |
150 | u.u_error = vn_rdwr(UIO_WRITE, vp, (caddr_t)ap, sizeof (acctbuf), |
151 | (off_t)0, UIO_SYSSPACE, IO_UNIT|IO_APPEND, u.u_cred, (int *)0); | |
06138e31 SL |
152 | } |
153 | ||
154 | /* | |
155 | * Produce a pseudo-floating point representation | |
156 | * with 3 bits base-8 exponent, 13 bits fraction. | |
157 | */ | |
032146e9 | 158 | compress(t, ut) |
06138e31 | 159 | register long t; |
032146e9 | 160 | long ut; |
06138e31 SL |
161 | { |
162 | register exp = 0, round = 0; | |
163 | ||
5d10e647 | 164 | t = t * AHZ; /* compiler will convert only this format to a shift */ |
032146e9 | 165 | if (ut) |
5d10e647 | 166 | t += ut / (1000000 / AHZ); |
06138e31 SL |
167 | while (t >= 8192) { |
168 | exp++; | |
169 | round = t&04; | |
170 | t >>= 3; | |
171 | } | |
172 | if (round) { | |
173 | t++; | |
174 | if (t >= 8192) { | |
175 | t >>= 3; | |
176 | exp++; | |
177 | } | |
178 | } | |
179 | return ((exp<<13) + t); | |
180 | } |