X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..b36670cedae0009469e8ee117453de831de64a6b:/bsd/kern/kern_acct.c diff --git a/bsd/kern/kern_acct.c b/bsd/kern/kern_acct.c index 3654a9dc8..0b3168147 100644 --- a/bsd/kern/kern_acct.c +++ b/bsd/kern/kern_acct.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * @@ -67,10 +67,11 @@ #include -#include -#include -#include -#include +#include +#include +#include +#include +#include #include #include #include @@ -79,6 +80,8 @@ #include #include #include +#include +#include /* * The routines implemented in this file are described in: @@ -96,15 +99,23 @@ * The former's operation is described in Leffler, et al., and the latter * was provided by UCB with the 4.4BSD-Lite release */ -comp_t encode_comp_t __P((u_long, u_long)); -void acctwatch __P((void *)); -void acctwatch_funnel __P((void *)); +comp_t encode_comp_t(u_long, u_long); +void acctwatch(void *); +void acctwatch_funnel(void *); /* - * Accounting vnode pointer, and saved vnode pointer. + * Accounting vnode pointer, and suspended accounting vnode pointer. States + * are as follows: + * + * acctp suspend_acctp state + * ------------- ------------ ------------------------------ + * NULL NULL Accounting disabled + * !NULL NULL Accounting enabled + * NULL !NULL Accounting enabled, but suspended + * !NULL !NULL */ struct vnode *acctp; -struct vnode *savacctp; +struct vnode *suspend_acctp; /* * Values associated with enabling and disabling accounting @@ -117,32 +128,32 @@ int acctchkfreq = 15; /* frequency (in seconds) to check space */ * Accounting system call. Written based on the specification and * previous implementation done by Mark Tinguely. */ -struct acct_args { - char *path; -}; -acct(p, uap, retval) - struct proc *p; - struct acct_args *uap; - int *retval; +int +acct(struct proc *p, struct acct_args *uap, __unused int *retval) { struct nameidata nd; int error; + struct vfs_context context; + + context.vc_proc = p; + context.vc_ucred = kauth_cred_get(); /* Make sure that the caller is root. */ - if (error = suser(p->p_ucred, &p->p_acflag)) + if ((error = suser(kauth_cred_get(), &p->p_acflag))) return (error); /* * If accounting is to be started to a file, open that file for * writing and make sure it's a 'normal'. */ - if (uap->path != NULL) { - NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, p); - if (error = vn_open(&nd, FWRITE, 0)) + if (uap->path != USER_ADDR_NULL) { + NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, &context); + if ((error = vn_open(&nd, FWRITE, 0))) return (error); - VOP_UNLOCK(nd.ni_vp, 0, p); + vnode_put(nd.ni_vp); + if (nd.ni_vp->v_type != VREG) { - vn_close(nd.ni_vp, FWRITE, p->p_ucred, p); + vn_close(nd.ni_vp, FWRITE, kauth_cred_get(), p); return (EACCES); } } @@ -151,13 +162,14 @@ acct(p, uap, retval) * If accounting was previously enabled, kill the old space-watcher, * close the file, and (if no new file was specified, leave). */ - if (acctp != NULLVP || savacctp != NULLVP) { + if (acctp != NULLVP || suspend_acctp != NULLVP) { untimeout(acctwatch_funnel, NULL); - error = vn_close((acctp != NULLVP ? acctp : savacctp), FWRITE, - p->p_ucred, p); - acctp = savacctp = NULLVP; + error = vn_close((acctp != NULLVP ? acctp : suspend_acctp), FWRITE, + kauth_cred_get(), p); + + acctp = suspend_acctp = NULLVP; } - if (uap->path == NULL) + if (uap->path == USER_ADDR_NULL) return (error); /* @@ -175,13 +187,15 @@ acct(p, uap, retval) * and are enumerated below. (They're also noted in the system * "acct.h" header file.) */ +int acct_process(p) struct proc *p; { - struct acct acct; + struct acct an_acct; struct rusage *r; struct timeval ut, st, tmp; - int s, t; + int t; + int error; struct vnode *vp; /* If accounting isn't enabled, don't bother */ @@ -194,20 +208,18 @@ acct_process(p) */ /* (1) The name of the command that ran */ - bcopy(p->p_comm, acct.ac_comm, sizeof acct.ac_comm); + bcopy(p->p_comm, an_acct.ac_comm, sizeof an_acct.ac_comm); /* (2) The amount of user and system time that was used */ calcru(p, &ut, &st, NULL); - acct.ac_utime = encode_comp_t(ut.tv_sec, ut.tv_usec); - acct.ac_stime = encode_comp_t(st.tv_sec, st.tv_usec); + an_acct.ac_utime = encode_comp_t(ut.tv_sec, ut.tv_usec); + an_acct.ac_stime = encode_comp_t(st.tv_sec, st.tv_usec); /* (3) The elapsed time the commmand ran (and its starting time) */ - acct.ac_btime = p->p_stats->p_start.tv_sec; - s = splclock(); - tmp = time; - splx(s); + an_acct.ac_btime = p->p_stats->p_start.tv_sec; + microtime(&tmp); timevalsub(&tmp, &p->p_stats->p_start); - acct.ac_etime = encode_comp_t(tmp.tv_sec, tmp.tv_usec); + an_acct.ac_etime = encode_comp_t(tmp.tv_sec, tmp.tv_usec); /* (4) The average amount of memory used */ r = &p->p_stats->p_ru; @@ -215,33 +227,36 @@ acct_process(p) timevaladd(&tmp, &st); t = tmp.tv_sec * hz + tmp.tv_usec / tick; if (t) - acct.ac_mem = (r->ru_ixrss + r->ru_idrss + r->ru_isrss) / t; + an_acct.ac_mem = (r->ru_ixrss + r->ru_idrss + r->ru_isrss) / t; else - acct.ac_mem = 0; + an_acct.ac_mem = 0; /* (5) The number of disk I/O operations done */ - acct.ac_io = encode_comp_t(r->ru_inblock + r->ru_oublock, 0); + an_acct.ac_io = encode_comp_t(r->ru_inblock + r->ru_oublock, 0); /* (6) The UID and GID of the process */ - acct.ac_uid = p->p_cred->p_ruid; - acct.ac_gid = p->p_cred->p_rgid; + an_acct.ac_uid = p->p_ucred->cr_ruid; + an_acct.ac_gid = p->p_ucred->cr_rgid; /* (7) The terminal from which the process was started */ if ((p->p_flag & P_CONTROLT) && p->p_pgrp->pg_session->s_ttyp) - acct.ac_tty = p->p_pgrp->pg_session->s_ttyp->t_dev; + an_acct.ac_tty = p->p_pgrp->pg_session->s_ttyp->t_dev; else - acct.ac_tty = NODEV; + an_acct.ac_tty = NODEV; /* (8) The boolean flags that tell how the process terminated, etc. */ - acct.ac_flag = p->p_acflag; + an_acct.ac_flag = p->p_acflag; /* * Now, just write the accounting information to the file. */ - VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); - return (vn_rdwr(UIO_WRITE, vp, (caddr_t)&acct, sizeof (acct), - (off_t)0, UIO_SYSSPACE, IO_APPEND|IO_UNIT, p->p_ucred, - (int *)0, p)); + if ((error = vnode_getwithref(vp)) == 0) { + error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&an_acct, sizeof (an_acct), + (off_t)0, UIO_SYSSPACE32, IO_APPEND|IO_UNIT, p->p_ucred, + (int *)0, p); + vnode_put(vp); + } + return (error); } /* @@ -301,32 +316,48 @@ acctwatch_funnel(a) */ /* ARGSUSED */ void -acctwatch(a) - void *a; +acctwatch(__unused void *a) { - struct statfs sb; - - if (savacctp != NULLVP) { - if (savacctp->v_type == VBAD) { - (void) vn_close(savacctp, FWRITE, NOCRED, NULL); - savacctp = NULLVP; + struct vfs_context context; + struct vfs_attr va; + + VFSATTR_INIT(&va); + VFSATTR_WANTED(&va, f_blocks); + VFSATTR_WANTED(&va, f_bavail); + context.vc_proc = current_proc(); + context.vc_ucred = kauth_cred_get(); + + if (suspend_acctp != NULLVP) { + /* + * Resuming accounting when accounting is suspended, and the + * filesystem containing the suspended accounting file goes + * below a low watermark + */ + if (suspend_acctp->v_type == VBAD) { + (void) vn_close(suspend_acctp, FWRITE, NOCRED, NULL); + suspend_acctp = NULLVP; return; } - (void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0); - if (sb.f_bavail > acctresume * sb.f_blocks / 100) { - acctp = savacctp; - savacctp = NULLVP; + (void)vfs_getattr(suspend_acctp->v_mount, &va, &context); + if (va.f_bavail > acctresume * va.f_blocks / 100) { + acctp = suspend_acctp; + suspend_acctp = NULLVP; log(LOG_NOTICE, "Accounting resumed\n"); } } else if (acctp != NULLVP) { + /* + * Suspending accounting when accounting is currently active, + * and the filesystem containing the active accounting file + * goes over a high watermark + */ if (acctp->v_type == VBAD) { (void) vn_close(acctp, FWRITE, NOCRED, NULL); acctp = NULLVP; return; } - (void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0); - if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) { - savacctp = acctp; + (void)vfs_getattr(acctp->v_mount, &va, &context); + if (va.f_bavail <= acctsuspend * va.f_blocks / 100) { + suspend_acctp = acctp; acctp = NULLVP; log(LOG_NOTICE, "Accounting suspended\n"); }