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-rw-r--r--fs/proc/base.c113
-rw-r--r--fs/proc/generic.c132
-rw-r--r--fs/proc/inode.c69
-rw-r--r--fs/proc/internal.h4
-rw-r--r--fs/proc/nommu.c2
-rw-r--r--fs/proc/proc_misc.c66
-rw-r--r--fs/proc/proc_sysctl.c52
-rw-r--r--fs/proc/proc_tty.c81
-rw-r--r--fs/proc/root.c14
-rw-r--r--fs/proc/task_mmu.c34
-rw-r--r--fs/proc/task_nommu.c34
11 files changed, 287 insertions, 314 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c5e412a00b1..fcf02f2deeb 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -195,12 +195,32 @@ static int proc_root_link(struct inode *inode, struct path *path)
return result;
}
-#define MAY_PTRACE(task) \
- (task == current || \
- (task->parent == current && \
- (task->ptrace & PT_PTRACED) && \
- (task_is_stopped_or_traced(task)) && \
- security_ptrace(current,task) == 0))
+/*
+ * Return zero if current may access user memory in @task, -error if not.
+ */
+static int check_mem_permission(struct task_struct *task)
+{
+ /*
+ * A task can always look at itself, in case it chooses
+ * to use system calls instead of load instructions.
+ */
+ if (task == current)
+ return 0;
+
+ /*
+ * If current is actively ptrace'ing, and would also be
+ * permitted to freshly attach with ptrace now, permit it.
+ */
+ if (task->parent == current && (task->ptrace & PT_PTRACED) &&
+ task_is_stopped_or_traced(task) &&
+ ptrace_may_attach(task))
+ return 0;
+
+ /*
+ * Noone else is allowed.
+ */
+ return -EPERM;
+}
struct mm_struct *mm_for_maps(struct task_struct *task)
{
@@ -722,7 +742,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
if (!task)
goto out_no_task;
- if (!MAY_PTRACE(task) || !ptrace_may_attach(task))
+ if (check_mem_permission(task))
goto out;
ret = -ENOMEM;
@@ -748,7 +768,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
retval = access_process_vm(task, src, page, this_len, 0);
- if (!retval || !MAY_PTRACE(task) || !ptrace_may_attach(task)) {
+ if (!retval || check_mem_permission(task)) {
if (!ret)
ret = -EIO;
break;
@@ -792,7 +812,7 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
if (!task)
goto out_no_task;
- if (!MAY_PTRACE(task) || !ptrace_may_attach(task))
+ if (check_mem_permission(task))
goto out;
copied = -ENOMEM;
@@ -1181,6 +1201,81 @@ static const struct file_operations proc_pid_sched_operations = {
#endif
+/*
+ * We added or removed a vma mapping the executable. The vmas are only mapped
+ * during exec and are not mapped with the mmap system call.
+ * Callers must hold down_write() on the mm's mmap_sem for these
+ */
+void added_exe_file_vma(struct mm_struct *mm)
+{
+ mm->num_exe_file_vmas++;
+}
+
+void removed_exe_file_vma(struct mm_struct *mm)
+{
+ mm->num_exe_file_vmas--;
+ if ((mm->num_exe_file_vmas == 0) && mm->exe_file){
+ fput(mm->exe_file);
+ mm->exe_file = NULL;
+ }
+
+}
+
+void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file)
+{
+ if (new_exe_file)
+ get_file(new_exe_file);
+ if (mm->exe_file)
+ fput(mm->exe_file);
+ mm->exe_file = new_exe_file;
+ mm->num_exe_file_vmas = 0;
+}
+
+struct file *get_mm_exe_file(struct mm_struct *mm)
+{
+ struct file *exe_file;
+
+ /* We need mmap_sem to protect against races with removal of
+ * VM_EXECUTABLE vmas */
+ down_read(&mm->mmap_sem);
+ exe_file = mm->exe_file;
+ if (exe_file)
+ get_file(exe_file);
+ up_read(&mm->mmap_sem);
+ return exe_file;
+}
+
+void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm)
+{
+ /* It's safe to write the exe_file pointer without exe_file_lock because
+ * this is called during fork when the task is not yet in /proc */
+ newmm->exe_file = get_mm_exe_file(oldmm);
+}
+
+static int proc_exe_link(struct inode *inode, struct path *exe_path)
+{
+ struct task_struct *task;
+ struct mm_struct *mm;
+ struct file *exe_file;
+
+ task = get_proc_task(inode);
+ if (!task)
+ return -ENOENT;
+ mm = get_task_mm(task);
+ put_task_struct(task);
+ if (!mm)
+ return -ENOENT;
+ exe_file = get_mm_exe_file(mm);
+ mmput(mm);
+ if (exe_file) {
+ *exe_path = exe_file->f_path;
+ path_get(&exe_file->f_path);
+ fput(exe_file);
+ return 0;
+ } else
+ return -ENOENT;
+}
+
static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index a36ad3c75cf..9d53b39a9cf 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -69,12 +69,7 @@ proc_file_read(struct file *file, char __user *buf, size_t nbytes,
count = min_t(size_t, PROC_BLOCK_SIZE, nbytes);
start = NULL;
- if (dp->get_info) {
- /* Handle old net routines */
- n = dp->get_info(page, &start, *ppos, count);
- if (n < count)
- eof = 1;
- } else if (dp->read_proc) {
+ if (dp->read_proc) {
/*
* How to be a proc read function
* ------------------------------
@@ -277,8 +272,11 @@ static int xlate_proc_name(const char *name,
int len;
int rtn = 0;
+ de = *ret;
+ if (!de)
+ de = &proc_root;
+
spin_lock(&proc_subdir_lock);
- de = &proc_root;
while (1) {
next = strchr(cp, '/');
if (!next)
@@ -385,20 +383,18 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
lock_kernel();
spin_lock(&proc_subdir_lock);
- if (de) {
- for (de = de->subdir; de ; de = de->next) {
- if (de->namelen != dentry->d_name.len)
- continue;
- if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
- unsigned int ino;
+ for (de = de->subdir; de ; de = de->next) {
+ if (de->namelen != dentry->d_name.len)
+ continue;
+ if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
+ unsigned int ino;
- ino = de->low_ino;
- de_get(de);
- spin_unlock(&proc_subdir_lock);
- error = -EINVAL;
- inode = proc_get_inode(dir->i_sb, ino, de);
- goto out_unlock;
- }
+ ino = de->low_ino;
+ de_get(de);
+ spin_unlock(&proc_subdir_lock);
+ error = -EINVAL;
+ inode = proc_get_inode(dir->i_sb, ino, de);
+ goto out_unlock;
}
}
spin_unlock(&proc_subdir_lock);
@@ -410,7 +406,8 @@ out_unlock:
d_add(dentry, inode);
return NULL;
}
- de_put(de);
+ if (de)
+ de_put(de);
return ERR_PTR(error);
}
@@ -440,10 +437,6 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
lock_kernel();
ino = inode->i_ino;
- if (!de) {
- ret = -EINVAL;
- goto out;
- }
i = filp->f_pos;
switch (i) {
case 0:
@@ -582,7 +575,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
/* make sure name is valid */
if (!name || !strlen(name)) goto out;
- if (!(*parent) && xlate_proc_name(name, parent, &fn) != 0)
+ if (xlate_proc_name(name, parent, &fn) != 0)
goto out;
/* At this point there must not be any '/' characters beyond *fn */
@@ -682,9 +675,10 @@ struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
return ent;
}
-struct proc_dir_entry *proc_create(const char *name, mode_t mode,
- struct proc_dir_entry *parent,
- const struct file_operations *proc_fops)
+struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
+ struct proc_dir_entry *parent,
+ const struct file_operations *proc_fops,
+ void *data)
{
struct proc_dir_entry *pde;
nlink_t nlink;
@@ -705,6 +699,7 @@ struct proc_dir_entry *proc_create(const char *name, mode_t mode,
if (!pde)
goto out;
pde->proc_fops = proc_fops;
+ pde->data = data;
if (proc_register(parent, pde) < 0)
goto out_free;
return pde;
@@ -734,55 +729,58 @@ void free_proc_entry(struct proc_dir_entry *de)
void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
{
struct proc_dir_entry **p;
- struct proc_dir_entry *de;
+ struct proc_dir_entry *de = NULL;
const char *fn = name;
int len;
- if (!parent && xlate_proc_name(name, &parent, &fn) != 0)
- goto out;
+ if (xlate_proc_name(name, &parent, &fn) != 0)
+ return;
len = strlen(fn);
spin_lock(&proc_subdir_lock);
for (p = &parent->subdir; *p; p=&(*p)->next ) {
- if (!proc_match(len, fn, *p))
- continue;
- de = *p;
- *p = de->next;
- de->next = NULL;
-
- spin_lock(&de->pde_unload_lock);
- /*
- * Stop accepting new callers into module. If you're
- * dynamically allocating ->proc_fops, save a pointer somewhere.
- */
- de->proc_fops = NULL;
- /* Wait until all existing callers into module are done. */
- if (de->pde_users > 0) {
- DECLARE_COMPLETION_ONSTACK(c);
-
- if (!de->pde_unload_completion)
- de->pde_unload_completion = &c;
-
- spin_unlock(&de->pde_unload_lock);
- spin_unlock(&proc_subdir_lock);
+ if (proc_match(len, fn, *p)) {
+ de = *p;
+ *p = de->next;
+ de->next = NULL;
+ break;
+ }
+ }
+ spin_unlock(&proc_subdir_lock);
+ if (!de)
+ return;
- wait_for_completion(de->pde_unload_completion);
+ spin_lock(&de->pde_unload_lock);
+ /*
+ * Stop accepting new callers into module. If you're
+ * dynamically allocating ->proc_fops, save a pointer somewhere.
+ */
+ de->proc_fops = NULL;
+ /* Wait until all existing callers into module are done. */
+ if (de->pde_users > 0) {
+ DECLARE_COMPLETION_ONSTACK(c);
+
+ if (!de->pde_unload_completion)
+ de->pde_unload_completion = &c;
- spin_lock(&proc_subdir_lock);
- goto continue_removing;
- }
spin_unlock(&de->pde_unload_lock);
+ wait_for_completion(de->pde_unload_completion);
+
+ goto continue_removing;
+ }
+ spin_unlock(&de->pde_unload_lock);
+
continue_removing:
- if (S_ISDIR(de->mode))
- parent->nlink--;
- de->nlink = 0;
- WARN_ON(de->subdir);
- if (atomic_dec_and_test(&de->count))
- free_proc_entry(de);
- break;
+ if (S_ISDIR(de->mode))
+ parent->nlink--;
+ de->nlink = 0;
+ if (de->subdir) {
+ printk(KERN_WARNING "%s: removing non-empty directory "
+ "'%s/%s', leaking at least '%s'\n", __func__,
+ de->parent->name, de->name, de->subdir->name);
+ WARN_ON(1);
}
- spin_unlock(&proc_subdir_lock);
-out:
- return;
+ if (atomic_dec_and_test(&de->count))
+ free_proc_entry(de);
}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 82b3a1b5a70..6f4e8dc97da 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -25,8 +25,7 @@
struct proc_dir_entry *de_get(struct proc_dir_entry *de)
{
- if (de)
- atomic_inc(&de->count);
+ atomic_inc(&de->count);
return de;
}
@@ -35,18 +34,16 @@ struct proc_dir_entry *de_get(struct proc_dir_entry *de)
*/
void de_put(struct proc_dir_entry *de)
{
- if (de) {
- lock_kernel();
- if (!atomic_read(&de->count)) {
- printk("de_put: entry %s already free!\n", de->name);
- unlock_kernel();
- return;
- }
-
- if (atomic_dec_and_test(&de->count))
- free_proc_entry(de);
+ lock_kernel();
+ if (!atomic_read(&de->count)) {
+ printk("de_put: entry %s already free!\n", de->name);
unlock_kernel();
+ return;
}
+
+ if (atomic_dec_and_test(&de->count))
+ free_proc_entry(de);
+ unlock_kernel();
}
/*
@@ -392,7 +389,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
{
struct inode * inode;
- if (de != NULL && !try_module_get(de->owner))
+ if (!try_module_get(de->owner))
goto out_mod;
inode = iget_locked(sb, ino);
@@ -402,30 +399,29 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
PROC_I(inode)->fd = 0;
PROC_I(inode)->pde = de;
- if (de) {
- if (de->mode) {
- inode->i_mode = de->mode;
- inode->i_uid = de->uid;
- inode->i_gid = de->gid;
- }
- if (de->size)
- inode->i_size = de->size;
- if (de->nlink)
- inode->i_nlink = de->nlink;
- if (de->proc_iops)
- inode->i_op = de->proc_iops;
- if (de->proc_fops) {
- if (S_ISREG(inode->i_mode)) {
+
+ if (de->mode) {
+ inode->i_mode = de->mode;
+ inode->i_uid = de->uid;
+ inode->i_gid = de->gid;
+ }
+ if (de->size)
+ inode->i_size = de->size;
+ if (de->nlink)
+ inode->i_nlink = de->nlink;
+ if (de->proc_iops)
+ inode->i_op = de->proc_iops;
+ if (de->proc_fops) {
+ if (S_ISREG(inode->i_mode)) {
#ifdef CONFIG_COMPAT
- if (!de->proc_fops->compat_ioctl)
- inode->i_fop =
- &proc_reg_file_ops_no_compat;
- else
+ if (!de->proc_fops->compat_ioctl)
+ inode->i_fop =
+ &proc_reg_file_ops_no_compat;
+ else
#endif
- inode->i_fop = &proc_reg_file_ops;
- } else {
- inode->i_fop = de->proc_fops;
- }
+ inode->i_fop = &proc_reg_file_ops;
+ } else {
+ inode->i_fop = de->proc_fops;
}
}
unlock_new_inode(inode);
@@ -433,8 +429,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
return inode;
out_ino:
- if (de != NULL)
- module_put(de->owner);
+ module_put(de->owner);
out_mod:
return NULL;
}
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index bc72f5c8c47..28cbca80590 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -11,6 +11,7 @@
#include <linux/proc_fs.h>
+extern struct proc_dir_entry proc_root;
#ifdef CONFIG_PROC_SYSCTL
extern int proc_sys_init(void);
#else
@@ -46,9 +47,6 @@ extern int nommu_vma_show(struct seq_file *, struct vm_area_struct *);
extern int maps_protect;
-extern void create_seq_entry(char *name, mode_t mode,
- const struct file_operations *f);
-extern int proc_exe_link(struct inode *, struct path *);
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index 941e95114b5..79ecd281d2c 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -137,7 +137,7 @@ static const struct file_operations proc_nommu_vma_list_operations = {
static int __init proc_nommu_init(void)
{
- create_seq_entry("maps", S_IRUGO, &proc_nommu_vma_list_operations);
+ proc_create("maps", S_IRUGO, NULL, &proc_nommu_vma_list_operations);
return 0;
}
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 441a32f0e5f..48bcf20cec2 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -826,14 +826,6 @@ static struct file_operations proc_kpageflags_operations = {
struct proc_dir_entry *proc_root_kcore;
-void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
-{
- struct proc_dir_entry *entry;
- entry = create_proc_entry(name, mode, NULL);
- if (entry)
- entry->proc_fops = f;
-}
-
void __init proc_misc_init(void)
{
static struct {
@@ -862,66 +854,52 @@ void __init proc_misc_init(void)
/* And now for trickier ones */
#ifdef CONFIG_PRINTK
- {
- struct proc_dir_entry *entry;
- entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
- if (entry)
- entry->proc_fops = &proc_kmsg_operations;
- }
+ proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
#endif
- create_seq_entry("locks", 0, &proc_locks_operations);
- create_seq_entry("devices", 0, &proc_devinfo_operations);
- create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
+ proc_create("locks", 0, NULL, &proc_locks_operations);
+ proc_create("devices", 0, NULL, &proc_devinfo_operations);
+ proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations);
#ifdef CONFIG_BLOCK
- create_seq_entry("partitions", 0, &proc_partitions_operations);
+ proc_create("partitions", 0, NULL, &proc_partitions_operations);
#endif
- create_seq_entry("stat", 0, &proc_stat_operations);
- create_seq_entry("interrupts", 0, &proc_interrupts_operations);
+ proc_create("stat", 0, NULL, &proc_stat_operations);
+ proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
#ifdef CONFIG_SLABINFO
- create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
+ proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);
#ifdef CONFIG_DEBUG_SLAB_LEAK
- create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
+ proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
#endif
#endif
#ifdef CONFIG_MMU
proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
#endif
- create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
- create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
- create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
- create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
+ proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
+ proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
+ proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
+ proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
#ifdef CONFIG_BLOCK
- create_seq_entry("diskstats", 0, &proc_diskstats_operations);
+ proc_create("diskstats", 0, NULL, &proc_diskstats_operations);
#endif
#ifdef CONFIG_MODULES
- create_seq_entry("modules", 0, &proc_modules_operations);
+ proc_create("modules", 0, NULL, &proc_modules_operations);
#endif
#ifdef CONFIG_SCHEDSTATS
- create_seq_entry("schedstat", 0, &proc_schedstat_operations);
+ proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
#endif
#ifdef CONFIG_PROC_KCORE
- proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
- if (proc_root_kcore) {
- proc_root_kcore->proc_fops = &proc_kcore_operations;
+ proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
+ if (proc_root_kcore)
proc_root_kcore->size =
(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
- }
#endif
#ifdef CONFIG_PROC_PAGE_MONITOR
- create_seq_entry("kpagecount", S_IRUSR, &proc_kpagecount_operations);
- create_seq_entry("kpageflags", S_IRUSR, &proc_kpageflags_operations);
+ proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations);
+ proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations);
#endif
#ifdef CONFIG_PROC_VMCORE
- proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
- if (proc_vmcore)
- proc_vmcore->proc_fops = &proc_vmcore_operations;
+ proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
#endif
#ifdef CONFIG_MAGIC_SYSRQ
- {
- struct proc_dir_entry *entry;
- entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
- if (entry)
- entry->proc_fops = &proc_sysrq_trigger_operations;
- }
+ proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations);
#endif
}
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 614c34b6d1c..5acc001d49f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -165,8 +165,8 @@ out:
return err;
}
-static ssize_t proc_sys_read(struct file *filp, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
+ size_t count, loff_t *ppos, int write)
{
struct dentry *dentry = filp->f_dentry;
struct ctl_table_header *head;
@@ -190,12 +190,12 @@ static ssize_t proc_sys_read(struct file *filp, char __user *buf,
* and won't be until we finish.
*/
error = -EPERM;
- if (sysctl_perm(table, MAY_READ))
+ if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
goto out;
/* careful: calling conventions are nasty here */
res = count;
- error = table->proc_handler(table, 0, filp, buf, &res, ppos);
+ error = table->proc_handler(table, write, filp, buf, &res, ppos);
if (!error)
error = res;
out:
@@ -204,44 +204,16 @@ out:
return error;
}
-static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
+static ssize_t proc_sys_read(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
- struct dentry *dentry = filp->f_dentry;
- struct ctl_table_header *head;
- struct ctl_table *table;
- ssize_t error;
- size_t res;
-
- table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
- /* Has the sysctl entry disappeared on us? */
- error = -ENOENT;
- if (!table)
- goto out;
-
- /* Has the sysctl entry been replaced by a directory? */
- error = -EISDIR;
- if (!table->proc_handler)
- goto out;
-
- /*
- * At this point we know that the sysctl was not unregistered
- * and won't be until we finish.
- */
- error = -EPERM;
- if (sysctl_perm(table, MAY_WRITE))
- goto out;
-
- /* careful: calling conventions are nasty here */
- res = count;
- error = table->proc_handler(table, 1, filp, (char __user *)buf,
- &res, ppos);
- if (!error)
- error = res;
-out:
- sysctl_head_finish(head);
+ return proc_sys_call_handler(filp, (void __user *)buf, count, ppos, 0);
+}
- return error;
+static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return proc_sys_call_handler(filp, (void __user *)buf, count, ppos, 1);
}
@@ -416,7 +388,7 @@ static int proc_sys_permission(struct inode *inode, int mask, struct nameidata *
goto out;
/* Use the permissions on the sysctl table entry */
- error = sysctl_perm(table, mask);
+ error = sysctl_perm(head->root, table, mask);
out:
sysctl_head_finish(head);
return error;
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index 49816e00b51..ac26ccc25f4 100644
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -5,7 +5,7 @@
*/
#include <asm/uaccess.h>
-
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/time.h>
@@ -136,39 +136,54 @@ static const struct file_operations proc_tty_drivers_operations = {
.release = seq_release,
};
-/*
- * This is the handler for /proc/tty/ldiscs
- */
-static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static void * tty_ldiscs_seq_start(struct seq_file *m, loff_t *pos)
{
- int i;
- int len = 0;
- off_t begin = 0;
+ return (*pos < NR_LDISCS) ? pos : NULL;
+}
+
+static void * tty_ldiscs_seq_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return (*pos < NR_LDISCS) ? pos : NULL;
+}
+
+static void tty_ldiscs_seq_stop(struct seq_file *m, void *v)
+{
+}
+
+static int tty_ldiscs_seq_show(struct seq_file *m, void *v)
+{
+ int i = *(loff_t *)v;
struct tty_ldisc *ld;
- for (i=0; i < NR_LDISCS; i++) {
- ld = tty_ldisc_get(i);
- if (ld == NULL)
- continue;
- len += sprintf(page+len, "%-10s %2d\n",
- ld->name ? ld->name : "???", i);
- tty_ldisc_put(i);
- if (len+begin > off+count)
- break;
- if (len+begin < off) {
- begin += len;
- len = 0;
- }
- }
- if (i >= NR_LDISCS)
- *eof = 1;
- if (off >= len+begin)
+ ld = tty_ldisc_get(i);
+ if (ld == NULL)
return 0;
- *start = page + (off-begin);
- return ((count < begin+len-off) ? count : begin+len-off);
+ seq_printf(m, "%-10s %2d\n", ld->name ? ld->name : "???", i);
+ tty_ldisc_put(i);
+ return 0;
+}
+
+static const struct seq_operations tty_ldiscs_seq_ops = {
+ .start = tty_ldiscs_seq_start,
+ .next = tty_ldiscs_seq_next,
+ .stop = tty_ldiscs_seq_stop,
+ .show = tty_ldiscs_seq_show,
+};
+
+static int proc_tty_ldiscs_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &tty_ldiscs_seq_ops);
}
+static const struct file_operations tty_ldiscs_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = proc_tty_ldiscs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
/*
* This function is called by tty_register_driver() to handle
* registering the driver's /proc handler into /proc/tty/driver/<foo>
@@ -214,7 +229,6 @@ void proc_tty_unregister_driver(struct tty_driver *driver)
*/
void __init proc_tty_init(void)
{
- struct proc_dir_entry *entry;
if (!proc_mkdir("tty", NULL))
return;
proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
@@ -224,10 +238,7 @@ void __init proc_tty_init(void)
* password lengths and inter-keystroke timings during password
* entry.
*/
- proc_tty_driver = proc_mkdir_mode("tty/driver", S_IRUSR | S_IXUSR, NULL);
-
- create_proc_read_entry("tty/ldiscs", 0, NULL, tty_ldiscs_read_proc, NULL);
- entry = create_proc_entry("tty/drivers", 0, NULL);
- if (entry)
- entry->proc_fops = &proc_tty_drivers_operations;
+ proc_tty_driver = proc_mkdir_mode("tty/driver", S_IRUSR|S_IXUSR, NULL);
+ proc_create("tty/ldiscs", 0, NULL, &tty_ldiscs_proc_fops);
+ proc_create("tty/drivers", 0, NULL, &proc_tty_drivers_operations);
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index ef0fb57fc9e..95117538a4f 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -22,8 +22,6 @@
#include "internal.h"
-struct proc_dir_entry *proc_bus, *proc_root_fs, *proc_root_driver;
-
static int proc_test_super(struct super_block *sb, void *data)
{
return sb->s_fs_info == data;
@@ -126,8 +124,8 @@ void __init proc_root_init(void)
#ifdef CONFIG_SYSVIPC
proc_mkdir("sysvipc", NULL);
#endif
- proc_root_fs = proc_mkdir("fs", NULL);
- proc_root_driver = proc_mkdir("driver", NULL);
+ proc_mkdir("fs", NULL);
+ proc_mkdir("driver", NULL);
proc_mkdir("fs/nfsd", NULL); /* somewhere for the nfsd filesystem to be mounted */
#if defined(CONFIG_SUN_OPENPROMFS) || defined(CONFIG_SUN_OPENPROMFS_MODULE)
/* just give it a mountpoint */
@@ -137,7 +135,7 @@ void __init proc_root_init(void)
#ifdef CONFIG_PROC_DEVICETREE
proc_device_tree_init();
#endif
- proc_bus = proc_mkdir("bus", NULL);
+ proc_mkdir("bus", NULL);
proc_sys_init();
}
@@ -232,9 +230,5 @@ void pid_ns_release_proc(struct pid_namespace *ns)
EXPORT_SYMBOL(proc_symlink);
EXPORT_SYMBOL(proc_mkdir);
EXPORT_SYMBOL(create_proc_entry);
-EXPORT_SYMBOL(proc_create);
+EXPORT_SYMBOL(proc_create_data);
EXPORT_SYMBOL(remove_proc_entry);
-EXPORT_SYMBOL(proc_root);
-EXPORT_SYMBOL(proc_root_fs);
-EXPORT_SYMBOL(proc_bus);
-EXPORT_SYMBOL(proc_root_driver);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 7415eeb7cc3..e2b8e769f51 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -75,40 +75,6 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
return mm->total_vm;
}
-int proc_exe_link(struct inode *inode, struct path *path)
-{
- struct vm_area_struct * vma;
- int result = -ENOENT;
- struct task_struct *task = get_proc_task(inode);
- struct mm_struct * mm = NULL;
-
- if (task) {
- mm = get_task_mm(task);
- put_task_struct(task);
- }
- if (!mm)
- goto out;
- down_read(&mm->mmap_sem);
-
- vma = mm->mmap;
- while (vma) {
- if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
- break;
- vma = vma->vm_next;
- }
-
- if (vma) {
- *path = vma->vm_file->f_path;
- path_get(&vma->vm_file->f_path);
- result = 0;
- }
-
- up_read(&mm->mmap_sem);
- mmput(mm);
-out:
- return result;
-}
-
static void pad_len_spaces(struct seq_file *m, int len)
{
len = 25 + sizeof(void*) * 6 - len;
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 8011528518b..4b733f10845 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -103,40 +103,6 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
return size;
}
-int proc_exe_link(struct inode *inode, struct path *path)
-{
- struct vm_list_struct *vml;
- struct vm_area_struct *vma;
- struct task_struct *task = get_proc_task(inode);
- struct mm_struct *mm = get_task_mm(task);
- int result = -ENOENT;
-
- if (!mm)
- goto out;
- down_read(&mm->mmap_sem);
-
- vml = mm->context.vmlist;
- vma = NULL;
- while (vml) {
- if ((vml->vma->vm_flags & VM_EXECUTABLE) && vml->vma->vm_file) {
- vma = vml->vma;
- break;
- }
- vml = vml->next;
- }
-
- if (vma) {
- *path = vma->vm_file->f_path;
- path_get(&vma->vm_file->f_path);
- result = 0;
- }
-
- up_read(&mm->mmap_sem);
- mmput(mm);
-out:
- return result;
-}
-
/*
* display mapping lines for a particular process's /proc/pid/maps
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-08 17:50:52 +0000