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-rw-r--r--fs/proc/base.c1073
1 files changed, 516 insertions, 557 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 144a96732dd..2d696b0c93b 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -73,6 +73,7 @@
#include <linux/security.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
+#include <linux/printk.h>
#include <linux/cgroup.h>
#include <linux/cpuset.h>
#include <linux/audit.h>
@@ -85,6 +86,7 @@
#include <linux/fs_struct.h>
#include <linux/slab.h>
#include <linux/flex_array.h>
+#include <linux/posix-timers.h>
#ifdef CONFIG_HARDWALL
#include <asm/hardwall.h>
#endif
@@ -198,41 +200,9 @@ static int proc_root_link(struct dentry *dentry, struct path *path)
return result;
}
-static int proc_pid_cmdline(struct task_struct *task, char * buffer)
+static int proc_pid_cmdline(struct task_struct *task, char *buffer)
{
- int res = 0;
- unsigned int len;
- struct mm_struct *mm = get_task_mm(task);
- if (!mm)
- goto out;
- if (!mm->arg_end)
- goto out_mm; /* Shh! No looking before we're done */
-
- len = mm->arg_end - mm->arg_start;
-
- if (len > PAGE_SIZE)
- len = PAGE_SIZE;
-
- res = access_process_vm(task, mm->arg_start, buffer, len, 0);
-
- // If the nul at the end of args has been overwritten, then
- // assume application is using setproctitle(3).
- if (res > 0 && buffer[res-1] != '\0' && len < PAGE_SIZE) {
- len = strnlen(buffer, res);
- if (len < res) {
- res = len;
- } else {
- len = mm->env_end - mm->env_start;
- if (len > PAGE_SIZE - res)
- len = PAGE_SIZE - res;
- res += access_process_vm(task, mm->env_start, buffer+res, len, 0);
- res = strnlen(buffer, res);
- }
- }
-out_mm:
- mmput(mm);
-out:
- return res;
+ return get_cmdline(task, buffer, PAGE_SIZE);
}
static int proc_pid_auxv(struct task_struct *task, char *buffer)
@@ -383,7 +353,7 @@ static int lstats_open(struct inode *inode, struct file *file)
static ssize_t lstats_write(struct file *file, const char __user *buf,
size_t count, loff_t *offs)
{
- struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
if (!task)
return -ESRCH;
@@ -403,6 +373,37 @@ static const struct file_operations proc_lstats_operations = {
#endif
+#ifdef CONFIG_CGROUPS
+static int cgroup_open(struct inode *inode, struct file *file)
+{
+ struct pid *pid = PROC_I(inode)->pid;
+ return single_open(file, proc_cgroup_show, pid);
+}
+
+static const struct file_operations proc_cgroup_operations = {
+ .open = cgroup_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
+#ifdef CONFIG_PROC_PID_CPUSET
+
+static int cpuset_open(struct inode *inode, struct file *file)
+{
+ struct pid *pid = PROC_I(inode)->pid;
+ return single_open(file, proc_cpuset_show, pid);
+}
+
+static const struct file_operations proc_cpuset_operations = {
+ .open = cpuset_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
static int proc_oom_score(struct task_struct *task, char *buffer)
{
unsigned long totalpages = totalram_pages + total_swap_pages;
@@ -542,13 +543,6 @@ int proc_setattr(struct dentry *dentry, struct iattr *attr)
if (error)
return error;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- return error;
- }
-
setattr_copy(inode, attr);
mark_inode_dirty(inode);
return 0;
@@ -609,7 +603,7 @@ static const struct inode_operations proc_def_inode_operations = {
static ssize_t proc_info_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
unsigned long page;
ssize_t length;
struct task_struct *task = get_proc_task(inode);
@@ -675,7 +669,7 @@ static const struct file_operations proc_single_file_operations = {
static int __mem_open(struct inode *inode, struct file *file, unsigned int mode)
{
- struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
struct mm_struct *mm;
if (!task)
@@ -873,12 +867,119 @@ static const struct file_operations proc_environ_operations = {
.release = mem_release,
};
+static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct task_struct *task = get_proc_task(file_inode(file));
+ char buffer[PROC_NUMBUF];
+ int oom_adj = OOM_ADJUST_MIN;
+ size_t len;
+ unsigned long flags;
+
+ if (!task)
+ return -ESRCH;
+ if (lock_task_sighand(task, &flags)) {
+ if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX)
+ oom_adj = OOM_ADJUST_MAX;
+ else
+ oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
+ OOM_SCORE_ADJ_MAX;
+ unlock_task_sighand(task, &flags);
+ }
+ put_task_struct(task);
+ len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
+ return simple_read_from_buffer(buf, count, ppos, buffer, len);
+}
+
+static ssize_t oom_adj_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task;
+ char buffer[PROC_NUMBUF];
+ int oom_adj;
+ unsigned long flags;
+ int err;
+
+ memset(buffer, 0, sizeof(buffer));
+ if (count > sizeof(buffer) - 1)
+ count = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, buf, count)) {
+ err = -EFAULT;
+ goto out;
+ }
+
+ err = kstrtoint(strstrip(buffer), 0, &oom_adj);
+ if (err)
+ goto out;
+ if ((oom_adj < OOM_ADJUST_MIN || oom_adj > OOM_ADJUST_MAX) &&
+ oom_adj != OOM_DISABLE) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ task = get_proc_task(file_inode(file));
+ if (!task) {
+ err = -ESRCH;
+ goto out;
+ }
+
+ task_lock(task);
+ if (!task->mm) {
+ err = -EINVAL;
+ goto err_task_lock;
+ }
+
+ if (!lock_task_sighand(task, &flags)) {
+ err = -ESRCH;
+ goto err_task_lock;
+ }
+
+ /*
+ * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum
+ * value is always attainable.
+ */
+ if (oom_adj == OOM_ADJUST_MAX)
+ oom_adj = OOM_SCORE_ADJ_MAX;
+ else
+ oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;
+
+ if (oom_adj < task->signal->oom_score_adj &&
+ !capable(CAP_SYS_RESOURCE)) {
+ err = -EACCES;
+ goto err_sighand;
+ }
+
+ /*
+ * /proc/pid/oom_adj is provided for legacy purposes, ask users to use
+ * /proc/pid/oom_score_adj instead.
+ */
+ pr_warn_once("%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n",
+ current->comm, task_pid_nr(current), task_pid_nr(task),
+ task_pid_nr(task));
+
+ task->signal->oom_score_adj = oom_adj;
+ trace_oom_score_adj_update(task);
+err_sighand:
+ unlock_task_sighand(task, &flags);
+err_task_lock:
+ task_unlock(task);
+ put_task_struct(task);
+out:
+ return err < 0 ? err : count;
+}
+
+static const struct file_operations proc_oom_adj_operations = {
+ .read = oom_adj_read,
+ .write = oom_adj_write,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
char buffer[PROC_NUMBUF];
- int oom_score_adj = OOM_SCORE_ADJ_MIN;
+ short oom_score_adj = OOM_SCORE_ADJ_MIN;
unsigned long flags;
size_t len;
@@ -889,7 +990,7 @@ static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
unlock_task_sighand(task, &flags);
}
put_task_struct(task);
- len = snprintf(buffer, sizeof(buffer), "%d\n", oom_score_adj);
+ len = snprintf(buffer, sizeof(buffer), "%hd\n", oom_score_adj);
return simple_read_from_buffer(buf, count, ppos, buffer, len);
}
@@ -919,7 +1020,7 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
goto out;
}
- task = get_proc_task(file->f_path.dentry->d_inode);
+ task = get_proc_task(file_inode(file));
if (!task) {
err = -ESRCH;
goto out;
@@ -936,15 +1037,15 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
goto err_task_lock;
}
- if (oom_score_adj < task->signal->oom_score_adj_min &&
+ if ((short)oom_score_adj < task->signal->oom_score_adj_min &&
!capable(CAP_SYS_RESOURCE)) {
err = -EACCES;
goto err_sighand;
}
- task->signal->oom_score_adj = oom_score_adj;
+ task->signal->oom_score_adj = (short)oom_score_adj;
if (has_capability_noaudit(current, CAP_SYS_RESOURCE))
- task->signal->oom_score_adj_min = oom_score_adj;
+ task->signal->oom_score_adj_min = (short)oom_score_adj;
trace_oom_score_adj_update(task);
err_sighand:
@@ -967,7 +1068,7 @@ static const struct file_operations proc_oom_score_adj_operations = {
static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
struct task_struct *task = get_proc_task(inode);
ssize_t length;
char tmpbuf[TMPBUFLEN];
@@ -984,7 +1085,7 @@ static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
char *page, *tmp;
ssize_t length;
uid_t loginuid;
@@ -1018,10 +1119,16 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
goto out_free_page;
}
- kloginuid = make_kuid(file->f_cred->user_ns, loginuid);
- if (!uid_valid(kloginuid)) {
- length = -EINVAL;
- goto out_free_page;
+
+ /* is userspace tring to explicitly UNSET the loginuid? */
+ if (loginuid == AUDIT_UID_UNSET) {
+ kloginuid = INVALID_UID;
+ } else {
+ kloginuid = make_kuid(file->f_cred->user_ns, loginuid);
+ if (!uid_valid(kloginuid)) {
+ length = -EINVAL;
+ goto out_free_page;
+ }
}
length = audit_set_loginuid(kloginuid);
@@ -1042,7 +1149,7 @@ static const struct file_operations proc_loginuid_operations = {
static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
struct task_struct *task = get_proc_task(inode);
ssize_t length;
char tmpbuf[TMPBUFLEN];
@@ -1065,7 +1172,7 @@ static const struct file_operations proc_sessionid_operations = {
static ssize_t proc_fault_inject_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
char buffer[PROC_NUMBUF];
size_t len;
int make_it_fail;
@@ -1097,7 +1204,10 @@ static ssize_t proc_fault_inject_write(struct file * file,
make_it_fail = simple_strtol(strstrip(buffer), &end, 0);
if (*end)
return -EINVAL;
- task = get_proc_task(file->f_dentry->d_inode);
+ if (make_it_fail < 0 || make_it_fail > 1)
+ return -EINVAL;
+
+ task = get_proc_task(file_inode(file));
if (!task)
return -ESRCH;
task->make_it_fail = make_it_fail;
@@ -1137,7 +1247,7 @@ static ssize_t
sched_write(struct file *file, const char __user *buf,
size_t count, loff_t *offset)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct task_struct *p;
p = get_proc_task(inode);
@@ -1188,7 +1298,7 @@ static ssize_t
sched_autogroup_write(struct file *file, const char __user *buf,
size_t count, loff_t *offset)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct task_struct *p;
char buffer[PROC_NUMBUF];
int nice;
@@ -1243,14 +1353,13 @@ static const struct file_operations proc_pid_sched_autogroup_operations = {
static ssize_t comm_write(struct file *file, const char __user *buf,
size_t count, loff_t *offset)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct task_struct *p;
char buffer[TASK_COMM_LEN];
+ const size_t maxlen = sizeof(buffer) - 1;
memset(buffer, 0, sizeof(buffer));
- if (count > sizeof(buffer) - 1)
- count = sizeof(buffer) - 1;
- if (copy_from_user(buffer, buf, count))
+ if (copy_from_user(buffer, buf, count > maxlen ? maxlen : count))
return -EFAULT;
p = get_proc_task(inode);
@@ -1520,6 +1629,20 @@ int pid_revalidate(struct dentry *dentry, unsigned int flags)
return 0;
}
+static inline bool proc_inode_is_dead(struct inode *inode)
+{
+ return !proc_pid(inode)->tasks[PIDTYPE_PID].first;
+}
+
+int pid_delete_dentry(const struct dentry *dentry)
+{
+ /* Is the task we represent dead?
+ * If so, then don't put the dentry on the lru list,
+ * kill it immediately.
+ */
+ return proc_inode_is_dead(dentry->d_inode);
+}
+
const struct dentry_operations pid_dentry_operations =
{
.d_revalidate = pid_revalidate,
@@ -1540,46 +1663,34 @@ const struct dentry_operations pid_dentry_operations =
* reported by readdir in sync with the inode numbers reported
* by stat.
*/
-int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
+bool proc_fill_cache(struct file *file, struct dir_context *ctx,
const char *name, int len,
instantiate_t instantiate, struct task_struct *task, const void *ptr)
{
- struct dentry *child, *dir = filp->f_path.dentry;
+ struct dentry *child, *dir = file->f_path.dentry;
+ struct qstr qname = QSTR_INIT(name, len);
struct inode *inode;
- struct qstr qname;
- ino_t ino = 0;
- unsigned type = DT_UNKNOWN;
-
- qname.name = name;
- qname.len = len;
- qname.hash = full_name_hash(name, len);
+ unsigned type;
+ ino_t ino;
- child = d_lookup(dir, &qname);
+ child = d_hash_and_lookup(dir, &qname);
if (!child) {
- struct dentry *new;
- new = d_alloc(dir, &qname);
- if (new) {
- child = instantiate(dir->d_inode, new, task, ptr);
- if (child)
- dput(new);
- else
- child = new;
+ child = d_alloc(dir, &qname);
+ if (!child)
+ goto end_instantiate;
+ if (instantiate(dir->d_inode, child, task, ptr) < 0) {
+ dput(child);
+ goto end_instantiate;
}
}
- if (!child || IS_ERR(child) || !child->d_inode)
- goto end_instantiate;
inode = child->d_inode;
- if (inode) {
- ino = inode->i_ino;
- type = inode->i_mode >> 12;
- }
+ ino = inode->i_ino;
+ type = inode->i_mode >> 12;
dput(child);
+ return dir_emit(ctx, name, len, ino, type);
+
end_instantiate:
- if (!ino)
- ino = find_inode_number(dir, &qname);
- if (!ino)
- ino = 1;
- return filldir(dirent, name, len, filp->f_pos, ino, type);
+ return dir_emit(ctx, name, len, 1, DT_UNKNOWN);
}
#ifdef CONFIG_CHECKPOINT_RESTORE
@@ -1611,7 +1722,7 @@ static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
return -ECHILD;
if (!capable(CAP_SYS_ADMIN)) {
- status = -EACCES;
+ status = -EPERM;
goto out_notask;
}
@@ -1684,6 +1795,7 @@ static int proc_map_files_get_link(struct dentry *dentry, struct path *path)
if (rc)
goto out_mmput;
+ rc = -ENOENT;
down_read(&mm->mmap_sem);
vma = find_exact_vma(mm, vm_start, vm_end);
if (vma && vma->vm_file) {
@@ -1705,7 +1817,7 @@ struct map_files_info {
unsigned char name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
};
-static struct dentry *
+static int
proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
@@ -1715,7 +1827,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
- return ERR_PTR(-ENOENT);
+ return -ENOENT;
ei = PROC_I(inode);
ei->op.proc_get_link = proc_map_files_get_link;
@@ -1732,7 +1844,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
d_set_d_op(dentry, &tid_map_files_dentry_operations);
d_add(dentry, inode);
- return NULL;
+ return 0;
}
static struct dentry *proc_map_files_lookup(struct inode *dir,
@@ -1741,23 +1853,23 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
unsigned long vm_start, vm_end;
struct vm_area_struct *vma;
struct task_struct *task;
- struct dentry *result;
+ int result;
struct mm_struct *mm;
- result = ERR_PTR(-EACCES);
+ result = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto out;
- result = ERR_PTR(-ENOENT);
+ result = -ENOENT;
task = get_proc_task(dir);
if (!task)
goto out;
- result = ERR_PTR(-EACCES);
+ result = -EACCES;
if (!ptrace_may_access(task, PTRACE_MODE_READ))
goto out_put_task;
- result = ERR_PTR(-ENOENT);
+ result = -ENOENT;
if (dname_to_vma_addr(dentry, &vm_start, &vm_end))
goto out_put_task;
@@ -1770,8 +1882,9 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
if (!vma)
goto out_no_vma;
- result = proc_map_files_instantiate(dir, dentry, task,
- (void *)(unsigned long)vma->vm_file->f_mode);
+ if (vma->vm_file)
+ result = proc_map_files_instantiate(dir, dentry, task,
+ (void *)(unsigned long)vma->vm_file->f_mode);
out_no_vma:
up_read(&mm->mmap_sem);
@@ -1779,7 +1892,7 @@ out_no_vma:
out_put_task:
put_task_struct(task);
out:
- return result;
+ return ERR_PTR(result);
}
static const struct inode_operations proc_map_files_inode_operations = {
@@ -1789,22 +1902,23 @@ static const struct inode_operations proc_map_files_inode_operations = {
};
static int
-proc_map_files_readdir(struct file *filp, void *dirent, filldir_t filldir)
+proc_map_files_readdir(struct file *file, struct dir_context *ctx)
{
- struct dentry *dentry = filp->f_path.dentry;
- struct inode *inode = dentry->d_inode;
struct vm_area_struct *vma;
struct task_struct *task;
struct mm_struct *mm;
- ino_t ino;
+ unsigned long nr_files, pos, i;
+ struct flex_array *fa = NULL;
+ struct map_files_info info;
+ struct map_files_info *p;
int ret;
- ret = -EACCES;
+ ret = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto out;
ret = -ENOENT;
- task = get_proc_task(inode);
+ task = get_proc_task(file_inode(file));
if (!task)
goto out;
@@ -1813,91 +1927,73 @@ proc_map_files_readdir(struct file *filp, void *dirent, filldir_t filldir)
goto out_put_task;
ret = 0;
- switch (filp->f_pos) {
- case 0:
- ino = inode->i_ino;
- if (filldir(dirent, ".", 1, 0, ino, DT_DIR) < 0)
- goto out_put_task;
- filp->f_pos++;
- case 1:
- ino = parent_ino(dentry);
- if (filldir(dirent, "..", 2, 1, ino, DT_DIR) < 0)
- goto out_put_task;
- filp->f_pos++;
- default:
- {
- unsigned long nr_files, pos, i;
- struct flex_array *fa = NULL;
- struct map_files_info info;
- struct map_files_info *p;
-
- mm = get_task_mm(task);
- if (!mm)
- goto out_put_task;
- down_read(&mm->mmap_sem);
+ if (!dir_emit_dots(file, ctx))
+ goto out_put_task;
- nr_files = 0;
+ mm = get_task_mm(task);
+ if (!mm)
+ goto out_put_task;
+ down_read(&mm->mmap_sem);
- /*
- * We need two passes here:
- *
- * 1) Collect vmas of mapped files with mmap_sem taken
- * 2) Release mmap_sem and instantiate entries
- *
- * otherwise we get lockdep complained, since filldir()
- * routine might require mmap_sem taken in might_fault().
- */
+ nr_files = 0;
- for (vma = mm->mmap, pos = 2; vma; vma = vma->vm_next) {
- if (vma->vm_file && ++pos > filp->f_pos)
- nr_files++;
- }
+ /*
+ * We need two passes here:
+ *
+ * 1) Collect vmas of mapped files with mmap_sem taken
+ * 2) Release mmap_sem and instantiate entries
+ *
+ * otherwise we get lockdep complained, since filldir()
+ * routine might require mmap_sem taken in might_fault().
+ */
- if (nr_files) {
- fa = flex_array_alloc(sizeof(info), nr_files,
- GFP_KERNEL);
- if (!fa || flex_array_prealloc(fa, 0, nr_files,
- GFP_KERNEL)) {
- ret = -ENOMEM;
- if (fa)
- flex_array_free(fa);
- up_read(&mm->mmap_sem);
- mmput(mm);
- goto out_put_task;
- }
- for (i = 0, vma = mm->mmap, pos = 2; vma;
- vma = vma->vm_next) {
- if (!vma->vm_file)
- continue;
- if (++pos <= filp->f_pos)
- continue;
-
- info.mode = vma->vm_file->f_mode;
- info.len = snprintf(info.name,
- sizeof(info.name), "%lx-%lx",
- vma->vm_start, vma->vm_end);
- if (flex_array_put(fa, i++, &info, GFP_KERNEL))
- BUG();
- }
- }
- up_read(&mm->mmap_sem);
+ for (vma = mm->mmap, pos = 2; vma; vma = vma->vm_next) {
+ if (vma->vm_file && ++pos > ctx->pos)
+ nr_files++;
+ }
- for (i = 0; i < nr_files; i++) {
- p = flex_array_get(fa, i);
- ret = proc_fill_cache(filp, dirent, filldir,
- p->name, p->len,
- proc_map_files_instantiate,
- task,
- (void *)(unsigned long)p->mode);
- if (ret)
- break;
- filp->f_pos++;
+ if (nr_files) {
+ fa = flex_array_alloc(sizeof(info), nr_files,
+ GFP_KERNEL);
+ if (!fa || flex_array_prealloc(fa, 0, nr_files,
+ GFP_KERNEL)) {
+ ret = -ENOMEM;
+ if (fa)
+ flex_array_free(fa);
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+ goto out_put_task;
+ }
+ for (i = 0, vma = mm->mmap, pos = 2; vma;
+ vma = vma->vm_next) {
+ if (!vma->vm_file)
+ continue;
+ if (++pos <= ctx->pos)
+ continue;
+
+ info.mode = vma->vm_file->f_mode;
+ info.len = snprintf(info.name,
+ sizeof(info.name), "%lx-%lx",
+ vma->vm_start, vma->vm_end);
+ if (flex_array_put(fa, i++, &info, GFP_KERNEL))
+ BUG();
}
- if (fa)
- flex_array_free(fa);
- mmput(mm);
}
+ up_read(&mm->mmap_sem);
+
+ for (i = 0; i < nr_files; i++) {
+ p = flex_array_get(fa, i);
+ if (!proc_fill_cache(file, ctx,
+ p->name, p->len,
+ proc_map_files_instantiate,
+ task,
+ (void *)(unsigned long)p->mode))
+ break;
+ ctx->pos++;
}
+ if (fa)
+ flex_array_free(fa);
+ mmput(mm);
out_put_task:
put_task_struct(task);
@@ -1907,19 +2003,115 @@ out:
static const struct file_operations proc_map_files_operations = {
.read = generic_read_dir,
- .readdir = proc_map_files_readdir,
+ .iterate = proc_map_files_readdir,
.llseek = default_llseek,
};
+struct timers_private {
+ struct pid *pid;
+ struct task_struct *task;
+ struct sighand_struct *sighand;
+ struct pid_namespace *ns;
+ unsigned long flags;
+};
+
+static void *timers_start(struct seq_file *m, loff_t *pos)
+{
+ struct timers_private *tp = m->private;
+
+ tp->task = get_pid_task(tp->pid, PIDTYPE_PID);
+ if (!tp->task)
+ return ERR_PTR(-ESRCH);
+
+ tp->sighand = lock_task_sighand(tp->task, &tp->flags);
+ if (!tp->sighand)
+ return ERR_PTR(-ESRCH);
+
+ return seq_list_start(&tp->task->signal->posix_timers, *pos);
+}
+
+static void *timers_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct timers_private *tp = m->private;
+ return seq_list_next(v, &tp->task->signal->posix_timers, pos);
+}
+
+static void timers_stop(struct seq_file *m, void *v)
+{
+ struct timers_private *tp = m->private;
+
+ if (tp->sighand) {
+ unlock_task_sighand(tp->task, &tp->flags);
+ tp->sighand = NULL;
+ }
+
+ if (tp->task) {
+ put_task_struct(tp->task);
+ tp->task = NULL;
+ }
+}
+
+static int show_timer(struct seq_file *m, void *v)
+{
+ struct k_itimer *timer;
+ struct timers_private *tp = m->private;
+ int notify;
+ static char *nstr[] = {
+ [SIGEV_SIGNAL] = "signal",
+ [SIGEV_NONE] = "none",
+ [SIGEV_THREAD] = "thread",
+ };
+
+ timer = list_entry((struct list_head *)v, struct k_itimer, list);
+ notify = timer->it_sigev_notify;
+
+ seq_printf(m, "ID: %d\n", timer->it_id);
+ seq_printf(m, "signal: %d/%p\n", timer->sigq->info.si_signo,
+ timer->sigq->info.si_value.sival_ptr);
+ seq_printf(m, "notify: %s/%s.%d\n",
+ nstr[notify & ~SIGEV_THREAD_ID],
+ (notify & SIGEV_THREAD_ID) ? "tid" : "pid",
+ pid_nr_ns(timer->it_pid, tp->ns));
+ seq_printf(m, "ClockID: %d\n", timer->it_clock);
+
+ return 0;
+}
+
+static const struct seq_operations proc_timers_seq_ops = {
+ .start = timers_start,
+ .next = timers_next,
+ .stop = timers_stop,
+ .show = show_timer,
+};
+
+static int proc_timers_open(struct inode *inode, struct file *file)
+{
+ struct timers_private *tp;
+
+ tp = __seq_open_private(file, &proc_timers_seq_ops,
+ sizeof(struct timers_private));
+ if (!tp)
+ return -ENOMEM;
+
+ tp->pid = proc_pid(inode);
+ tp->ns = inode->i_sb->s_fs_info;
+ return 0;
+}
+
+static const struct file_operations proc_timers_operations = {
+ .open = proc_timers_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
#endif /* CONFIG_CHECKPOINT_RESTORE */
-static struct dentry *proc_pident_instantiate(struct inode *dir,
+static int proc_pident_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
const struct pid_entry *p = ptr;
struct inode *inode;
struct proc_inode *ei;
- struct dentry *error = ERR_PTR(-ENOENT);
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
@@ -1938,9 +2130,9 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *proc_pident_lookup(struct inode *dir,
@@ -1948,11 +2140,11 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
const struct pid_entry *ents,
unsigned int nents)
{
- struct dentry *error;
+ int error;
struct task_struct *task = get_proc_task(dir);
const struct pid_entry *p, *last;
- error = ERR_PTR(-ENOENT);
+ error = -ENOENT;
if (!task)
goto out_no_task;
@@ -1975,77 +2167,40 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
out:
put_task_struct(task);
out_no_task:
- return error;
-}
-
-static int proc_pident_fill_cache(struct file *filp, void *dirent,
- filldir_t filldir, struct task_struct *task, const struct pid_entry *p)
-{
- return proc_fill_cache(filp, dirent, filldir, p->name, p->len,
- proc_pident_instantiate, task, p);
+ return ERR_PTR(error);
}
-static int proc_pident_readdir(struct file *filp,
- void *dirent, filldir_t filldir,
+static int proc_pident_readdir(struct file *file, struct dir_context *ctx,
const struct pid_entry *ents, unsigned int nents)
{
- int i;
- struct dentry *dentry = filp->f_path.dentry;
- struct inode *inode = dentry->d_inode;
- struct task_struct *task = get_proc_task(inode);
- const struct pid_entry *p, *last;
- ino_t ino;
- int ret;
+ struct task_struct *task = get_proc_task(file_inode(file));
+ const struct pid_entry *p;
- ret = -ENOENT;
if (!task)
- goto out_no_task;
+ return -ENOENT;
- ret = 0;
- i = filp->f_pos;
- switch (i) {
- case 0:
- ino = inode->i_ino;
- if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
- goto out;
- i++;
- filp->f_pos++;
- /* fall through */
- case 1:
- ino = parent_ino(dentry);
- if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
- goto out;
- i++;
- filp->f_pos++;
- /* fall through */
- default:
- i -= 2;
- if (i >= nents) {
- ret = 1;
- goto out;
- }
- p = ents + i;
- last = &ents[nents - 1];
- while (p <= last) {
- if (proc_pident_fill_cache(filp, dirent, filldir, task, p) < 0)
- goto out;
- filp->f_pos++;
- p++;
- }
- }
+ if (!dir_emit_dots(file, ctx))
+ goto out;
+
+ if (ctx->pos >= nents + 2)
+ goto out;
- ret = 1;
+ for (p = ents + (ctx->pos - 2); p <= ents + nents - 1; p++) {
+ if (!proc_fill_cache(file, ctx, p->name, p->len,
+ proc_pident_instantiate, task, p))
+ break;
+ ctx->pos++;
+ }
out:
put_task_struct(task);
-out_no_task:
- return ret;
+ return 0;
}
#ifdef CONFIG_SECURITY
static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
char *p = NULL;
ssize_t length;
struct task_struct *task = get_proc_task(inode);
@@ -2066,7 +2221,7 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
size_t count, loff_t *ppos)
{
- struct inode * inode = file->f_path.dentry->d_inode;
+ struct inode * inode = file_inode(file);
char *page;
ssize_t length;
struct task_struct *task = get_proc_task(inode);
@@ -2123,16 +2278,15 @@ static const struct pid_entry attr_dir_stuff[] = {
REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
};
-static int proc_attr_dir_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+static int proc_attr_dir_readdir(struct file *file, struct dir_context *ctx)
{
- return proc_pident_readdir(filp,dirent,filldir,
- attr_dir_stuff,ARRAY_SIZE(attr_dir_stuff));
+ return proc_pident_readdir(file, ctx,
+ attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
}
static const struct file_operations proc_attr_dir_operations = {
.read = generic_read_dir,
- .readdir = proc_attr_dir_readdir,
+ .iterate = proc_attr_dir_readdir,
.llseek = default_llseek,
};
@@ -2155,7 +2309,7 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
struct mm_struct *mm;
char buffer[PROC_NUMBUF];
size_t len;
@@ -2207,7 +2361,7 @@ static ssize_t proc_coredump_filter_write(struct file *file,
goto out_no_task;
ret = -ESRCH;
- task = get_proc_task(file->f_dentry->d_inode);
+ task = get_proc_task(file_inode(file));
if (!task)
goto out_no_task;
@@ -2237,146 +2391,6 @@ static const struct file_operations proc_coredump_filter_operations = {
};
#endif
-/*
- * /proc/self:
- */
-static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
-{
- struct pid_namespace *ns = dentry->d_sb->s_fs_info;
- pid_t tgid = task_tgid_nr_ns(current, ns);
- char tmp[PROC_NUMBUF];
- if (!tgid)
- return -ENOENT;
- sprintf(tmp, "%d", tgid);
- return vfs_readlink(dentry,buffer,buflen,tmp);
-}
-
-static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- struct pid_namespace *ns = dentry->d_sb->s_fs_info;
- pid_t tgid = task_tgid_nr_ns(current, ns);
- char *name = ERR_PTR(-ENOENT);
- if (tgid) {
- /* 11 for max length of signed int in decimal + NULL term */
- name = kmalloc(12, GFP_KERNEL);
- if (!name)
- name = ERR_PTR(-ENOMEM);
- else
- sprintf(name, "%d", tgid);
- }
- nd_set_link(nd, name);
- return NULL;
-}
-
-static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
- void *cookie)
-{
- char *s = nd_get_link(nd);
- if (!IS_ERR(s))
- kfree(s);
-}
-
-static const struct inode_operations proc_self_inode_operations = {
- .readlink = proc_self_readlink,
- .follow_link = proc_self_follow_link,
- .put_link = proc_self_put_link,
-};
-
-/*
- * proc base
- *
- * These are the directory entries in the root directory of /proc
- * that properly belong to the /proc filesystem, as they describe
- * describe something that is process related.
- */
-static const struct pid_entry proc_base_stuff[] = {
- NOD("self", S_IFLNK|S_IRWXUGO,
- &proc_self_inode_operations, NULL, {}),
-};
-
-static struct dentry *proc_base_instantiate(struct inode *dir,
- struct dentry *dentry, struct task_struct *task, const void *ptr)
-{
- const struct pid_entry *p = ptr;
- struct inode *inode;
- struct proc_inode *ei;
- struct dentry *error;
-
- /* Allocate the inode */
- error = ERR_PTR(-ENOMEM);
- inode = new_inode(dir->i_sb);
- if (!inode)
- goto out;
-
- /* Initialize the inode */
- ei = PROC_I(inode);
- inode->i_ino = get_next_ino();
- inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-
- /*
- * grab the reference to the task.
- */
- ei->pid = get_task_pid(task, PIDTYPE_PID);
- if (!ei->pid)
- goto out_iput;
-
- inode->i_mode = p->mode;
- if (S_ISDIR(inode->i_mode))
- set_nlink(inode, 2);
- if (S_ISLNK(inode->i_mode))
- inode->i_size = 64;
- if (p->iop)
- inode->i_op = p->iop;
- if (p->fop)
- inode->i_fop = p->fop;
- ei->op = p->op;
- d_add(dentry, inode);
- error = NULL;
-out:
- return error;
-out_iput:
- iput(inode);
- goto out;
-}
-
-static struct dentry *proc_base_lookup(struct inode *dir, struct dentry *dentry)
-{
- struct dentry *error;
- struct task_struct *task = get_proc_task(dir);
- const struct pid_entry *p, *last;
-
- error = ERR_PTR(-ENOENT);
-
- if (!task)
- goto out_no_task;
-
- /* Lookup the directory entry */
- last = &proc_base_stuff[ARRAY_SIZE(proc_base_stuff) - 1];
- for (p = proc_base_stuff; p <= last; p++) {
- if (p->len != dentry->d_name.len)
- continue;
- if (!memcmp(dentry->d_name.name, p->name, p->len))
- break;
- }
- if (p > last)
- goto out;
-
- error = proc_base_instantiate(dir, dentry, task, p);
-
-out:
- put_task_struct(task);
-out_no_task:
- return error;
-}
-
-static int proc_base_fill_cache(struct file *filp, void *dirent,
- filldir_t filldir, struct task_struct *task, const struct pid_entry *p)
-{
- return proc_fill_cache(filp, dirent, filldir, p->name, p->len,
- proc_base_instantiate, task, p);
-}
-
#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
{
@@ -2545,7 +2559,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("environ", S_IRUSR, proc_environ_operations),
INF("auxv", S_IRUSR, proc_pid_auxv),
ONE("status", S_IRUGO, proc_pid_status),
- ONE("personality", S_IRUGO, proc_pid_personality),
+ ONE("personality", S_IRUSR, proc_pid_personality),
INF("limits", S_IRUGO, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
@@ -2555,7 +2569,7 @@ static const struct pid_entry tgid_base_stuff[] = {
#endif
REG("comm", S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
- INF("syscall", S_IRUGO, proc_pid_syscall),
+ INF("syscall", S_IRUSR, proc_pid_syscall),
#endif
INF("cmdline", S_IRUGO, proc_pid_cmdline),
ONE("stat", S_IRUGO, proc_tgid_stat),
@@ -2574,7 +2588,7 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
REG("smaps", S_IRUGO, proc_pid_smaps_operations),
- REG("pagemap", S_IRUGO, proc_pagemap_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
@@ -2583,7 +2597,7 @@ static const struct pid_entry tgid_base_stuff[] = {
INF("wchan", S_IRUGO, proc_pid_wchan),
#endif
#ifdef CONFIG_STACKTRACE
- ONE("stack", S_IRUGO, proc_pid_stack),
+ ONE("stack", S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHEDSTATS
INF("schedstat", S_IRUGO, proc_pid_schedstat),
@@ -2598,6 +2612,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
@@ -2620,18 +2635,20 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("gid_map", S_IRUGO|S_IWUSR, proc_gid_map_operations),
REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
#endif
+#ifdef CONFIG_CHECKPOINT_RESTORE
+ REG("timers", S_IRUGO, proc_timers_operations),
+#endif
};
-static int proc_tgid_base_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
{
- return proc_pident_readdir(filp,dirent,filldir,
- tgid_base_stuff,ARRAY_SIZE(tgid_base_stuff));
+ return proc_pident_readdir(file, ctx,
+ tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}
static const struct file_operations proc_tgid_base_operations = {
.read = generic_read_dir,
- .readdir = proc_tgid_base_readdir,
+ .iterate = proc_tgid_base_readdir,
.llseek = default_llseek,
};
@@ -2656,6 +2673,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
name.name = buf;
name.len = snprintf(buf, sizeof(buf), "%d", pid);
+ /* no ->d_hash() rejects on procfs */
dentry = d_hash_and_lookup(mnt->mnt_root, &name);
if (dentry) {
shrink_dcache_parent(dentry);
@@ -2730,17 +2748,12 @@ void proc_flush_task(struct task_struct *task)
proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
tgid->numbers[i].nr);
}
-
- upid = &pid->numbers[pid->level];
- if (upid->nr == 1)
- pid_ns_release_proc(upid->ns);
}
-static struct dentry *proc_pid_instantiate(struct inode *dir,
- struct dentry * dentry,
- struct task_struct *task, const void *ptr)
+static int proc_pid_instantiate(struct inode *dir,
+ struct dentry * dentry,
+ struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
struct inode *inode;
inode = proc_pid_make_inode(dir->i_sb, task);
@@ -2760,22 +2773,18 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- struct dentry *result;
+ int result = 0;
struct task_struct *task;
unsigned tgid;
struct pid_namespace *ns;
- result = proc_base_lookup(dir, dentry);
- if (!IS_ERR(result) || PTR_ERR(result) != -ENOENT)
- goto out;
-
tgid = name_to_int(dentry);
if (tgid == ~0U)
goto out;
@@ -2792,7 +2801,7 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsign
result = proc_pid_instantiate(dir, dentry, task, NULL);
put_task_struct(task);
out:
- return result;
+ return ERR_PTR(result);
}
/*
@@ -2838,67 +2847,44 @@ retry:
return iter;
}
-#define TGID_OFFSET (FIRST_PROCESS_ENTRY + ARRAY_SIZE(proc_base_stuff))
-
-static int proc_pid_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
- struct tgid_iter iter)
-{
- char name[PROC_NUMBUF];
- int len = snprintf(name, sizeof(name), "%d", iter.tgid);
- return proc_fill_cache(filp, dirent, filldir, name, len,
- proc_pid_instantiate, iter.task, NULL);
-}
-
-static int fake_filldir(void *buf, const char *name, int namelen,
- loff_t offset, u64 ino, unsigned d_type)
-{
- return 0;
-}
+#define TGID_OFFSET (FIRST_PROCESS_ENTRY + 1)
/* for the /proc/ directory itself, after non-process stuff has been done */
-int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
+int proc_pid_readdir(struct file *file, struct dir_context *ctx)
{
- unsigned int nr;
- struct task_struct *reaper;
struct tgid_iter iter;
- struct pid_namespace *ns;
- filldir_t __filldir;
-
- if (filp->f_pos >= PID_MAX_LIMIT + TGID_OFFSET)
- goto out_no_task;
- nr = filp->f_pos - FIRST_PROCESS_ENTRY;
+ struct pid_namespace *ns = file->f_dentry->d_sb->s_fs_info;
+ loff_t pos = ctx->pos;
- reaper = get_proc_task(filp->f_path.dentry->d_inode);
- if (!reaper)
- goto out_no_task;
+ if (pos >= PID_MAX_LIMIT + TGID_OFFSET)
+ return 0;
- for (; nr < ARRAY_SIZE(proc_base_stuff); filp->f_pos++, nr++) {
- const struct pid_entry *p = &proc_base_stuff[nr];
- if (proc_base_fill_cache(filp, dirent, filldir, reaper, p) < 0)
- goto out;
+ if (pos == TGID_OFFSET - 1) {
+ struct inode *inode = ns->proc_self->d_inode;
+ if (!dir_emit(ctx, "self", 4, inode->i_ino, DT_LNK))
+ return 0;
+ iter.tgid = 0;
+ } else {
+ iter.tgid = pos - TGID_OFFSET;
}
-
- ns = filp->f_dentry->d_sb->s_fs_info;
iter.task = NULL;
- iter.tgid = filp->f_pos - TGID_OFFSET;
for (iter = next_tgid(ns, iter);
iter.task;
iter.tgid += 1, iter = next_tgid(ns, iter)) {
- if (has_pid_permissions(ns, iter.task, 2))
- __filldir = filldir;
- else
- __filldir = fake_filldir;
+ char name[PROC_NUMBUF];
+ int len;
+ if (!has_pid_permissions(ns, iter.task, 2))
+ continue;
- filp->f_pos = iter.tgid + TGID_OFFSET;
- if (proc_pid_fill_cache(filp, dirent, __filldir, iter) < 0) {
+ len = snprintf(name, sizeof(name), "%d", iter.tgid);
+ ctx->pos = iter.tgid + TGID_OFFSET;
+ if (!proc_fill_cache(file, ctx, name, len,
+ proc_pid_instantiate, iter.task, NULL)) {
put_task_struct(iter.task);
- goto out;
+ return 0;
}
}
- filp->f_pos = PID_MAX_LIMIT + TGID_OFFSET;
-out:
- put_task_struct(reaper);
-out_no_task:
+ ctx->pos = PID_MAX_LIMIT + TGID_OFFSET;
return 0;
}
@@ -2912,14 +2898,14 @@ static const struct pid_entry tid_base_stuff[] = {
REG("environ", S_IRUSR, proc_environ_operations),
INF("auxv", S_IRUSR, proc_pid_auxv),
ONE("status", S_IRUGO, proc_pid_status),
- ONE("personality", S_IRUGO, proc_pid_personality),
+ ONE("personality", S_IRUSR, proc_pid_personality),
INF("limits", S_IRUGO, proc_pid_limits),
#ifdef CONFIG_SCHED_DEBUG
REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
#endif
REG("comm", S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
- INF("syscall", S_IRUGO, proc_pid_syscall),
+ INF("syscall", S_IRUSR, proc_pid_syscall),
#endif
INF("cmdline", S_IRUGO, proc_pid_cmdline),
ONE("stat", S_IRUGO, proc_tid_stat),
@@ -2940,7 +2926,7 @@ static const struct pid_entry tid_base_stuff[] = {
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
REG("smaps", S_IRUGO, proc_tid_smaps_operations),
- REG("pagemap", S_IRUGO, proc_pagemap_operations),
+ REG("pagemap", S_IRUSR, proc_pagemap_operations),
#endif
#ifdef CONFIG_SECURITY
DIR("attr", S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
@@ -2949,7 +2935,7 @@ static const struct pid_entry tid_base_stuff[] = {
INF("wchan", S_IRUGO, proc_pid_wchan),
#endif
#ifdef CONFIG_STACKTRACE
- ONE("stack", S_IRUGO, proc_pid_stack),
+ ONE("stack", S_IRUSR, proc_pid_stack),
#endif
#ifdef CONFIG_SCHEDSTATS
INF("schedstat", S_IRUGO, proc_pid_schedstat),
@@ -2964,6 +2950,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
@@ -2985,11 +2972,10 @@ static const struct pid_entry tid_base_stuff[] = {
#endif
};
-static int proc_tid_base_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
{
- return proc_pident_readdir(filp,dirent,filldir,
- tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
+ return proc_pident_readdir(file, ctx,
+ tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}
static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
@@ -3000,7 +2986,7 @@ static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *den
static const struct file_operations proc_tid_base_operations = {
.read = generic_read_dir,
- .readdir = proc_tid_base_readdir,
+ .iterate = proc_tid_base_readdir,
.llseek = default_llseek,
};
@@ -3010,10 +2996,9 @@ static const struct inode_operations proc_tid_base_inode_operations = {
.setattr = proc_setattr,
};
-static struct dentry *proc_task_instantiate(struct inode *dir,
+static int proc_task_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
struct inode *inode;
inode = proc_pid_make_inode(dir->i_sb, task);
@@ -3032,14 +3017,14 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- struct dentry *result = ERR_PTR(-ENOENT);
+ int result = -ENOENT;
struct task_struct *task;
struct task_struct *leader = get_proc_task(dir);
unsigned tid;
@@ -3069,7 +3054,7 @@ out_drop_task:
out:
put_task_struct(leader);
out_no_task:
- return result;
+ return ERR_PTR(result);
}
/*
@@ -3084,34 +3069,42 @@ out_no_task:
* In the case of a seek we start with the leader and walk nr
* threads past it.
*/
-static struct task_struct *first_tid(struct task_struct *leader,
- int tid, int nr, struct pid_namespace *ns)
+static struct task_struct *first_tid(struct pid *pid, int tid, loff_t f_pos,
+ struct pid_namespace *ns)
{
- struct task_struct *pos;
+ struct task_struct *pos, *task;
+ unsigned long nr = f_pos;
+
+ if (nr != f_pos) /* 32bit overflow? */
+ return NULL;
rcu_read_lock();
- /* Attempt to start with the pid of a thread */
- if (tid && (nr > 0)) {
+ task = pid_task(pid, PIDTYPE_PID);
+ if (!task)
+ goto fail;
+
+ /* Attempt to start with the tid of a thread */
+ if (tid && nr) {
pos = find_task_by_pid_ns(tid, ns);
- if (pos && (pos->group_leader == leader))
+ if (pos && same_thread_group(pos, task))
goto found;
}
/* If nr exceeds the number of threads there is nothing todo */
- pos = NULL;
- if (nr && nr >= get_nr_threads(leader))
- goto out;
+ if (nr >= get_nr_threads(task))
+ goto fail;
/* If we haven't found our starting place yet start
* with the leader and walk nr threads forward.
*/
- for (pos = leader; nr > 0; --nr) {
- pos = next_thread(pos);
- if (pos == leader) {
- pos = NULL;
- goto out;
- }
- }
+ pos = task = task->group_leader;
+ do {
+ if (!nr--)
+ goto found;
+ } while_each_thread(task, pos);
+fail:
+ pos = NULL;
+ goto out;
found:
get_task_struct(pos);
out:
@@ -3141,78 +3134,44 @@ static struct task_struct *next_tid(struct task_struct *start)
return pos;
}
-static int proc_task_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
- struct task_struct *task, int tid)
-{
- char name[PROC_NUMBUF];
- int len = snprintf(name, sizeof(name), "%d", tid);
- return proc_fill_cache(filp, dirent, filldir, name, len,
- proc_task_instantiate, task, NULL);
-}
-
/* for the /proc/TGID/task/ directories */
-static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldir)
+static int proc_task_readdir(struct file *file, struct dir_context *ctx)
{
- struct dentry *dentry = filp->f_path.dentry;
- struct inode *inode = dentry->d_inode;
- struct task_struct *leader = NULL;
+ struct inode *inode = file_inode(file);
struct task_struct *task;
- int retval = -ENOENT;
- ino_t ino;
- int tid;
struct pid_namespace *ns;
+ int tid;
- task = get_proc_task(inode);
- if (!task)
- goto out_no_task;
- rcu_read_lock();
- if (pid_alive(task)) {
- leader = task->group_leader;
- get_task_struct(leader);
- }
- rcu_read_unlock();
- put_task_struct(task);
- if (!leader)
- goto out_no_task;
- retval = 0;
+ if (proc_inode_is_dead(inode))
+ return -ENOENT;
- switch ((unsigned long)filp->f_pos) {
- case 0:
- ino = inode->i_ino;
- if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) < 0)
- goto out;
- filp->f_pos++;
- /* fall through */
- case 1:
- ino = parent_ino(dentry);
- if (filldir(dirent, "..", 2, filp->f_pos, ino, DT_DIR) < 0)
- goto out;
- filp->f_pos++;
- /* fall through */
- }
+ if (!dir_emit_dots(file, ctx))
+ return 0;
/* f_version caches the tgid value that the last readdir call couldn't
* return. lseek aka telldir automagically resets f_version to 0.
*/
- ns = filp->f_dentry->d_sb->s_fs_info;
- tid = (int)filp->f_version;
- filp->f_version = 0;
- for (task = first_tid(leader, tid, filp->f_pos - 2, ns);
+ ns = file->f_dentry->d_sb->s_fs_info;
+ tid = (int)file->f_version;
+ file->f_version = 0;
+ for (task = first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
task;
- task = next_tid(task), filp->f_pos++) {
+ task = next_tid(task), ctx->pos++) {
+ char name[PROC_NUMBUF];
+ int len;
tid = task_pid_nr_ns(task, ns);
- if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
+ len = snprintf(name, sizeof(name), "%d", tid);
+ if (!proc_fill_cache(file, ctx, name, len,
+ proc_task_instantiate, task, NULL)) {
/* returning this tgid failed, save it as the first
* pid for the next readir call */
- filp->f_version = (u64)tid;
+ file->f_version = (u64)tid;
put_task_struct(task);
break;
}
}
-out:
- put_task_struct(leader);
-out_no_task:
- return retval;
+
+ return 0;
}
static int proc_task_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
@@ -3238,6 +3197,6 @@ static const struct inode_operations proc_task_inode_operations = {
static const struct file_operations proc_task_operations = {
.read = generic_read_dir,
- .readdir = proc_task_readdir,
+ .iterate = proc_task_readdir,
.llseek = default_llseek,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 11:24:57 +0000