X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Facct.c;h=91e1cfd734d286f922597108e54065ef691d31b2;hb=7bf570dc8dcf76df2a9f583bef2da96d4289ed0d;hp=ca561903936779bc64e800f7655754a034bf6bf0;hpb=24ec839c431eb79bb8f6abc00c4e1eb3b8c4d517;p=safe%2Fjmp%2Flinux-2.6 diff --git a/kernel/acct.c b/kernel/acct.c index ca56190..91e1cfd 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -58,6 +58,7 @@ #include #include #include /* sector_div */ +#include /* * These constants control the amount of freespace that suspend and @@ -74,7 +75,7 @@ int acct_parm[3] = {4, 2, 30}; /* * External references and all of the globals. */ -static void do_acct_process(struct file *); +static void do_acct_process(struct pid_namespace *ns, struct file *); /* * This structure is used so that all the data protected by lock @@ -86,6 +87,7 @@ struct acct_glbs { volatile int active; volatile int needcheck; struct file *file; + struct pid_namespace *ns; struct timer_list timer; }; @@ -118,7 +120,7 @@ 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; @@ -175,9 +177,11 @@ out: static void acct_file_reopen(struct file *file) { struct file *old_acct = NULL; + struct pid_namespace *old_ns = NULL; if (acct_globals.file) { old_acct = acct_globals.file; + old_ns = acct_globals.ns; del_timer(&acct_globals.timer); acct_globals.active = 0; acct_globals.needcheck = 0; @@ -185,6 +189,7 @@ static void acct_file_reopen(struct file *file) } if (file) { acct_globals.file = file; + acct_globals.ns = get_pid_ns(task_active_pid_ns(current)); acct_globals.needcheck = 0; acct_globals.active = 1; /* It's been deleted if it was used before so this is safe */ @@ -194,10 +199,11 @@ 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(old_acct); + do_acct_process(old_ns, old_acct); filp_close(old_acct, NULL); + put_pid_ns(old_ns); spin_lock(&acct_globals.lock); } } @@ -212,7 +218,7 @@ 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 +235,11 @@ 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 +289,7 @@ 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 +305,7 @@ 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 +335,16 @@ 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 +367,30 @@ 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 +419,13 @@ 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(struct file *file) +static void do_acct_process(struct pid_namespace *ns, struct file *file) { struct pacct_struct *pacct = ¤t->signal->pacct; acct_t ac; @@ -468,7 +474,7 @@ static void do_acct_process(struct file *file) } #endif do_div(elapsed, AHZ); - ac.ac_btime = xtime.tv_sec - elapsed; + 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; @@ -481,16 +487,15 @@ static void do_acct_process(struct file *file) ac.ac_gid16 = current->gid; #endif #if ACCT_VERSION==3 - ac.ac_pid = current->tgid; - ac.ac_ppid = current->parent->tgid; + ac.ac_pid = task_tgid_nr_ns(current, ns); + rcu_read_lock(); + ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent), ns); + rcu_read_unlock(); #endif - mutex_lock(&tty_mutex); - tty = get_current_tty(); - ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0; - mutex_unlock(&tty_mutex); - 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; @@ -504,14 +509,14 @@ static void do_acct_process(struct file *file) ac.ac_swaps = encode_comp_t(0); /* - * 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, @@ -581,6 +586,7 @@ void acct_collect(long exitcode, int group_dead) void acct_process(void) { struct file *file = NULL; + struct pid_namespace *ns; /* * accelerate the common fastpath: @@ -595,8 +601,10 @@ void acct_process(void) return; } get_file(file); + ns = get_pid_ns(acct_globals.ns); spin_unlock(&acct_globals.lock); - do_acct_process(file); + do_acct_process(ns, file); fput(file); + put_pid_ns(ns); }