X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Facct.c;h=cf19547cc9e42d346c49b0e51e89aa5fb19364d6;hb=8002cedc1adbf51e2d56091534ef7551b88329b4;hp=b35263137824a6aa139e5ad6c89d46add40c8400;hpb=0e4648141af02331f21aabcd34940c70f09a2d04;p=linux-2.6 diff --git a/kernel/acct.c b/kernel/acct.c index b352631378..cf19547cc9 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -43,7 +43,6 @@ * a struct file opened for write. Fixed. 2/6/2000, AV. */ -#include #include #include #include @@ -75,7 +74,7 @@ int acct_parm[3] = {4, 2, 30}; /* * External references and all of the globals. */ -static void do_acct_process(long, struct file *); +static void do_acct_process(struct file *); /* * This structure is used so that all the data protected by lock @@ -90,7 +89,8 @@ struct acct_glbs { struct timer_list timer; }; -static struct acct_glbs acct_globals __cacheline_aligned = {SPIN_LOCK_UNLOCKED}; +static struct acct_glbs acct_globals __cacheline_aligned = + {__SPIN_LOCK_UNLOCKED(acct_globals.lock)}; /* * Called whenever the timer says to check the free space. @@ -118,7 +118,7 @@ static int check_free_space(struct file *file) spin_unlock(&acct_globals.lock); /* May block */ - if (vfs_statfs(file->f_dentry, &sbuf)) + if (vfs_statfs(file->f_path.dentry, &sbuf)) return res; suspend = sbuf.f_blocks * SUSPEND; resume = sbuf.f_blocks * RESUME; @@ -194,9 +194,9 @@ static void acct_file_reopen(struct file *file) add_timer(&acct_globals.timer); } if (old_acct) { - mnt_unpin(old_acct->f_vfsmnt); + mnt_unpin(old_acct->f_path.mnt); spin_unlock(&acct_globals.lock); - do_acct_process(0, old_acct); + do_acct_process(old_acct); filp_close(old_acct, NULL); spin_lock(&acct_globals.lock); } @@ -212,7 +212,7 @@ static int acct_on(char *name) if (IS_ERR(file)) return PTR_ERR(file); - if (!S_ISREG(file->f_dentry->d_inode->i_mode)) { + if (!S_ISREG(file->f_path.dentry->d_inode->i_mode)) { filp_close(file, NULL); return -EACCES; } @@ -229,11 +229,11 @@ static int acct_on(char *name) } spin_lock(&acct_globals.lock); - mnt_pin(file->f_vfsmnt); + mnt_pin(file->f_path.mnt); acct_file_reopen(file); spin_unlock(&acct_globals.lock); - mntput(file->f_vfsmnt); /* it's pinned, now give up active reference */ + mntput(file->f_path.mnt); /* it's pinned, now give up active reference */ return 0; } @@ -283,7 +283,7 @@ asmlinkage long sys_acct(const char __user *name) void acct_auto_close_mnt(struct vfsmount *m) { spin_lock(&acct_globals.lock); - if (acct_globals.file && acct_globals.file->f_vfsmnt == m) + if (acct_globals.file && acct_globals.file->f_path.mnt == m) acct_file_reopen(NULL); spin_unlock(&acct_globals.lock); } @@ -299,7 +299,7 @@ void acct_auto_close(struct super_block *sb) { spin_lock(&acct_globals.lock); if (acct_globals.file && - acct_globals.file->f_vfsmnt->mnt_sb == sb) { + acct_globals.file->f_path.mnt->mnt_sb == sb) { acct_file_reopen(NULL); } spin_unlock(&acct_globals.lock); @@ -329,16 +329,16 @@ static comp_t encode_comp_t(unsigned long value) } /* - * If we need to round up, do it (and handle overflow correctly). - */ + * If we need to round up, do it (and handle overflow correctly). + */ if (rnd && (++value > MAXFRACT)) { value >>= EXPSIZE; exp++; } /* - * Clean it up and polish it off. - */ + * Clean it up and polish it off. + */ exp <<= MANTSIZE; /* Shift the exponent into place */ exp += value; /* and add on the mantissa. */ return exp; @@ -361,30 +361,30 @@ static comp_t encode_comp_t(unsigned long value) static comp2_t encode_comp2_t(u64 value) { - int exp, rnd; - - exp = (value > (MAXFRACT2>>1)); - rnd = 0; - while (value > MAXFRACT2) { - rnd = value & 1; - value >>= 1; - exp++; - } - - /* - * If we need to round up, do it (and handle overflow correctly). - */ - if (rnd && (++value > MAXFRACT2)) { - value >>= 1; - exp++; - } - - if (exp > MAXEXP2) { - /* Overflow. Return largest representable number instead. */ - return (1ul << (MANTSIZE2+EXPSIZE2-1)) - 1; - } else { - return (value & (MAXFRACT2>>1)) | (exp << (MANTSIZE2-1)); - } + int exp, rnd; + + exp = (value > (MAXFRACT2>>1)); + rnd = 0; + while (value > MAXFRACT2) { + rnd = value & 1; + value >>= 1; + exp++; + } + + /* + * If we need to round up, do it (and handle overflow correctly). + */ + if (rnd && (++value > MAXFRACT2)) { + value >>= 1; + exp++; + } + + if (exp > MAXEXP2) { + /* Overflow. Return largest representable number instead. */ + return (1ul << (MANTSIZE2+EXPSIZE2-1)) - 1; + } else { + return (value & (MAXFRACT2>>1)) | (exp << (MANTSIZE2-1)); + } } #endif @@ -413,13 +413,13 @@ static u32 encode_float(u64 value) * The acct_process() call is the workhorse of the process * accounting system. The struct acct is built here and then written * into the accounting file. This function should only be called from - * do_exit(). + * do_exit() or when switching to a different output file. */ /* * do_acct_process does all actual work. Caller holds the reference to file. */ -static void do_acct_process(long exitcode, struct file *file) +static void do_acct_process(struct file *file) { struct pacct_struct *pacct = ¤t->signal->pacct; acct_t ac; @@ -428,7 +428,7 @@ static void do_acct_process(long exitcode, struct file *file) u64 elapsed; u64 run_time; struct timespec uptime; - unsigned long jiffies; + struct tty_struct *tty; /* * First check to see if there is enough free_space to continue @@ -468,13 +468,7 @@ static void do_acct_process(long exitcode, struct file *file) } #endif do_div(elapsed, AHZ); - ac.ac_btime = xtime.tv_sec - elapsed; - jiffies = cputime_to_jiffies(cputime_add(current->utime, - current->signal->utime)); - ac.ac_utime = encode_comp_t(jiffies_to_AHZ(jiffies)); - jiffies = cputime_to_jiffies(cputime_add(current->stime, - current->signal->stime)); - ac.ac_stime = encode_comp_t(jiffies_to_AHZ(jiffies)); + ac.ac_btime = get_seconds() - elapsed; /* we really need to bite the bullet and change layout */ ac.ac_uid = current->uid; ac.ac_gid = current->gid; @@ -491,41 +485,30 @@ static void do_acct_process(long exitcode, struct file *file) ac.ac_ppid = current->parent->tgid; #endif - read_lock(&tasklist_lock); /* pin current->signal */ - ac.ac_tty = current->signal->tty ? - old_encode_dev(tty_devnum(current->signal->tty)) : 0; - read_unlock(&tasklist_lock); - - ac.ac_flag = 0; - if (current->flags & PF_FORKNOEXEC) - ac.ac_flag |= AFORK; - if (current->flags & PF_SUPERPRIV) - ac.ac_flag |= ASU; - if (current->flags & PF_DUMPCORE) - ac.ac_flag |= ACORE; - if (current->flags & PF_SIGNALED) - ac.ac_flag |= AXSIG; - spin_lock(¤t->sighand->siglock); + spin_lock_irq(¤t->sighand->siglock); + tty = current->signal->tty; + ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0; + ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime))); + ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime))); + ac.ac_flag = pacct->ac_flag; ac.ac_mem = encode_comp_t(pacct->ac_mem); - spin_unlock(¤t->sighand->siglock); + ac.ac_minflt = encode_comp_t(pacct->ac_minflt); + ac.ac_majflt = encode_comp_t(pacct->ac_majflt); + ac.ac_exitcode = pacct->ac_exitcode; + spin_unlock_irq(¤t->sighand->siglock); ac.ac_io = encode_comp_t(0 /* current->io_usage */); /* %% */ ac.ac_rw = encode_comp_t(ac.ac_io / 1024); - ac.ac_minflt = encode_comp_t(current->signal->min_flt + - current->min_flt); - ac.ac_majflt = encode_comp_t(current->signal->maj_flt + - current->maj_flt); ac.ac_swaps = encode_comp_t(0); - ac.ac_exitcode = exitcode; /* - * Kernel segment override to datasegment and write it - * to the accounting file. - */ + * Kernel segment override to datasegment and write it + * to the accounting file. + */ fs = get_fs(); set_fs(KERNEL_DS); /* - * Accounting records are not subject to resource limits. - */ + * Accounting records are not subject to resource limits. + */ flim = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY; file->f_op->write(file, (char *)&ac, @@ -536,21 +519,25 @@ static void do_acct_process(long exitcode, struct file *file) /** * acct_init_pacct - initialize a new pacct_struct + * @pacct: per-process accounting info struct to initialize */ void acct_init_pacct(struct pacct_struct *pacct) { memset(pacct, 0, sizeof(struct pacct_struct)); + pacct->ac_utime = pacct->ac_stime = cputime_zero; } /** * acct_collect - collect accounting information into pacct_struct + * @exitcode: task exit code + * @group_dead: not 0, if this thread is the last one in the process. */ -void acct_collect(void) +void acct_collect(long exitcode, int group_dead) { struct pacct_struct *pacct = ¤t->signal->pacct; unsigned long vsize = 0; - if (current->mm) { + if (group_dead && current->mm) { struct vm_area_struct *vma; down_read(¤t->mm->mmap_sem); vma = current->mm->mmap; @@ -561,9 +548,25 @@ void acct_collect(void) up_read(¤t->mm->mmap_sem); } - spin_lock(¤t->sighand->siglock); - pacct->ac_mem = vsize / 1024; - spin_unlock(¤t->sighand->siglock); + spin_lock_irq(¤t->sighand->siglock); + if (group_dead) + pacct->ac_mem = vsize / 1024; + if (thread_group_leader(current)) { + pacct->ac_exitcode = exitcode; + if (current->flags & PF_FORKNOEXEC) + pacct->ac_flag |= AFORK; + } + if (current->flags & PF_SUPERPRIV) + pacct->ac_flag |= ASU; + if (current->flags & PF_DUMPCORE) + pacct->ac_flag |= ACORE; + if (current->flags & PF_SIGNALED) + pacct->ac_flag |= AXSIG; + pacct->ac_utime = cputime_add(pacct->ac_utime, current->utime); + pacct->ac_stime = cputime_add(pacct->ac_stime, current->stime); + pacct->ac_minflt += current->min_flt; + pacct->ac_majflt += current->maj_flt; + spin_unlock_irq(¤t->sighand->siglock); } /** @@ -572,7 +575,7 @@ void acct_collect(void) * * handles process accounting for an exiting task */ -void acct_process(long exitcode) +void acct_process(void) { struct file *file = NULL; @@ -591,36 +594,6 @@ void acct_process(long exitcode) get_file(file); spin_unlock(&acct_globals.lock); - do_acct_process(exitcode, file); + do_acct_process(file); fput(file); } - - -/** - * acct_update_integrals - update mm integral fields in task_struct - * @tsk: task_struct for accounting - */ -void acct_update_integrals(struct task_struct *tsk) -{ - if (likely(tsk->mm)) { - long delta = - cputime_to_jiffies(tsk->stime) - tsk->acct_stimexpd; - - if (delta == 0) - return; - tsk->acct_stimexpd = tsk->stime; - tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm); - tsk->acct_vm_mem1 += delta * tsk->mm->total_vm; - } -} - -/** - * acct_clear_integrals - clear the mm integral fields in task_struct - * @tsk: task_struct whose accounting fields are cleared - */ -void acct_clear_integrals(struct task_struct *tsk) -{ - tsk->acct_stimexpd = 0; - tsk->acct_rss_mem1 = 0; - tsk->acct_vm_mem1 = 0; -}