aboutsummaryrefslogtreecommitdiff
path: root/kernel/acct.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/acct.c')
-rw-r--r--kernel/acct.c73
1 files changed, 31 insertions, 42 deletions
diff --git a/kernel/acct.c b/kernel/acct.c
index fa7eb3de2dd..808a86ff229 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -55,7 +55,7 @@
#include <linux/times.h>
#include <linux/syscalls.h>
#include <linux/mount.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/div64.h>
#include <linux/blkdev.h> /* sector_div */
#include <linux/pid_namespace.h>
@@ -84,11 +84,10 @@ static void do_acct_process(struct bsd_acct_struct *acct,
* the cache line to have the data after getting the lock.
*/
struct bsd_acct_struct {
- volatile int active;
- volatile int needcheck;
+ int active;
+ unsigned long needcheck;
struct file *file;
struct pid_namespace *ns;
- struct timer_list timer;
struct list_head list;
};
@@ -96,15 +95,6 @@ static DEFINE_SPINLOCK(acct_lock);
static LIST_HEAD(acct_list);
/*
- * Called whenever the timer says to check the free space.
- */
-static void acct_timeout(unsigned long x)
-{
- struct bsd_acct_struct *acct = (struct bsd_acct_struct *)x;
- acct->needcheck = 1;
-}
-
-/*
* Check the amount of free space and suspend/resume accordingly.
*/
static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
@@ -112,12 +102,12 @@ static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
struct kstatfs sbuf;
int res;
int act;
- sector_t resume;
- sector_t suspend;
+ u64 resume;
+ u64 suspend;
spin_lock(&acct_lock);
res = acct->active;
- if (!file || !acct->needcheck)
+ if (!file || time_is_before_jiffies(acct->needcheck))
goto out;
spin_unlock(&acct_lock);
@@ -127,8 +117,8 @@ static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
suspend = sbuf.f_blocks * SUSPEND;
resume = sbuf.f_blocks * RESUME;
- sector_div(suspend, 100);
- sector_div(resume, 100);
+ do_div(suspend, 100);
+ do_div(resume, 100);
if (sbuf.f_bavail <= suspend)
act = -1;
@@ -144,7 +134,7 @@ static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
spin_lock(&acct_lock);
if (file != acct->file) {
if (act)
- res = act>0;
+ res = act > 0;
goto out;
}
@@ -160,10 +150,7 @@ static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
}
}
- del_timer(&acct->timer);
- acct->needcheck = 0;
- acct->timer.expires = jiffies + ACCT_TIMEOUT*HZ;
- add_timer(&acct->timer);
+ acct->needcheck = jiffies + ACCT_TIMEOUT*HZ;
res = acct->active;
out:
spin_unlock(&acct_lock);
@@ -185,9 +172,7 @@ static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
if (acct->file) {
old_acct = acct->file;
old_ns = acct->ns;
- del_timer(&acct->timer);
acct->active = 0;
- acct->needcheck = 0;
acct->file = NULL;
acct->ns = NULL;
list_del(&acct->list);
@@ -195,13 +180,9 @@ static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
if (file) {
acct->file = file;
acct->ns = ns;
- acct->needcheck = 0;
+ acct->needcheck = jiffies + ACCT_TIMEOUT*HZ;
acct->active = 1;
list_add(&acct->list, &acct_list);
- /* It's been deleted if it was used before so this is safe */
- setup_timer(&acct->timer, acct_timeout, (unsigned long)acct);
- acct->timer.expires = jiffies + ACCT_TIMEOUT*HZ;
- add_timer(&acct->timer);
}
if (old_acct) {
mnt_unpin(old_acct->f_path.mnt);
@@ -212,7 +193,7 @@ static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
}
}
-static int acct_on(char *name)
+static int acct_on(struct filename *pathname)
{
struct file *file;
struct vfsmount *mnt;
@@ -220,11 +201,11 @@ static int acct_on(char *name)
struct bsd_acct_struct *acct = NULL;
/* Difference from BSD - they don't do O_APPEND */
- file = filp_open(name, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
+ file = file_open_name(pathname, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
if (IS_ERR(file))
return PTR_ERR(file);
- if (!S_ISREG(file->f_path.dentry->d_inode->i_mode)) {
+ if (!S_ISREG(file_inode(file)->i_mode)) {
filp_close(file, NULL);
return -EACCES;
}
@@ -279,9 +260,9 @@ SYSCALL_DEFINE1(acct, const char __user *, name)
return -EPERM;
if (name) {
- char *tmp = getname(name);
+ struct filename *tmp = getname(name);
if (IS_ERR(tmp))
- return (PTR_ERR(tmp));
+ return PTR_ERR(tmp);
error = acct_on(tmp);
putname(tmp);
} else {
@@ -334,7 +315,7 @@ void acct_auto_close(struct super_block *sb)
spin_lock(&acct_lock);
restart:
list_for_each_entry(acct, &acct_list, list)
- if (acct->file && acct->file->f_path.mnt->mnt_sb == sb) {
+ if (acct->file && acct->file->f_path.dentry->d_sb == sb) {
acct_file_reopen(acct, NULL, NULL);
goto restart;
}
@@ -348,7 +329,6 @@ void acct_exit_ns(struct pid_namespace *ns)
if (acct == NULL)
return;
- del_timer_sync(&acct->timer);
spin_lock(&acct_lock);
if (acct->file != NULL)
acct_file_reopen(acct, NULL, NULL);
@@ -498,7 +478,7 @@ static void do_acct_process(struct bsd_acct_struct *acct,
* Fill the accounting struct with the needed info as recorded
* by the different kernel functions.
*/
- memset((caddr_t)&ac, 0, sizeof(acct_t));
+ memset(&ac, 0, sizeof(acct_t));
ac.ac_version = ACCT_VERSION | ACCT_BYTEORDER;
strlcpy(ac.ac_comm, current->comm, sizeof(ac.ac_comm));
@@ -527,8 +507,8 @@ static void do_acct_process(struct bsd_acct_struct *acct,
do_div(elapsed, AHZ);
ac.ac_btime = get_seconds() - elapsed;
/* we really need to bite the bullet and change layout */
- ac.ac_uid = orig_cred->uid;
- ac.ac_gid = orig_cred->gid;
+ ac.ac_uid = from_kuid_munged(file->f_cred->user_ns, orig_cred->uid);
+ ac.ac_gid = from_kgid_munged(file->f_cred->user_ns, orig_cred->gid);
#if ACCT_VERSION==2
ac.ac_ahz = AHZ;
#endif
@@ -560,6 +540,12 @@ static void do_acct_process(struct bsd_acct_struct *acct,
ac.ac_swaps = encode_comp_t(0);
/*
+ * Get freeze protection. If the fs is frozen, just skip the write
+ * as we could deadlock the system otherwise.
+ */
+ if (!file_start_write_trylock(file))
+ goto out;
+ /*
* Kernel segment override to datasegment and write it
* to the accounting file.
*/
@@ -574,6 +560,7 @@ static void do_acct_process(struct bsd_acct_struct *acct,
sizeof(acct_t), &file->f_pos);
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = flim;
set_fs(fs);
+ file_end_write(file);
out:
revert_creds(orig_cred);
}
@@ -586,6 +573,7 @@ out:
void acct_collect(long exitcode, int group_dead)
{
struct pacct_struct *pacct = &current->signal->pacct;
+ cputime_t utime, stime;
unsigned long vsize = 0;
if (group_dead && current->mm) {
@@ -613,8 +601,9 @@ void acct_collect(long exitcode, int group_dead)
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);
+ task_cputime(current, &utime, &stime);
+ pacct->ac_utime += utime;
+ pacct->ac_stime += stime;
pacct->ac_minflt += current->min_flt;
pacct->ac_majflt += current->maj_flt;
spin_unlock_irq(&current->sighand->siglock);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:22:53 +0000