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-rw-r--r--fs/proc/base.c4
-rw-r--r--fs/proc/generic.c21
-rw-r--r--fs/proc/inode.c31
-rw-r--r--fs/proc/internal.h10
-rw-r--r--fs/proc/page.c45
5 files changed, 28 insertions, 83 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 4df4a464a919..18d5cc62d8ed 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2266,7 +2266,7 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
#endif
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
@@ -2623,7 +2623,7 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_FAULT_INJECTION
REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
#endif
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
#endif
#ifdef CONFIG_TASK_IO_ACCOUNTING
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index fa678abc9db1..480cb1065eec 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -429,7 +429,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
unsigned int ino;
ino = de->low_ino;
- de_get(de);
+ pde_get(de);
spin_unlock(&proc_subdir_lock);
error = -EINVAL;
inode = proc_get_inode(dir->i_sb, ino, de);
@@ -445,7 +445,7 @@ out_unlock:
return NULL;
}
if (de)
- de_put(de);
+ pde_put(de);
return ERR_PTR(error);
}
@@ -509,17 +509,17 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
struct proc_dir_entry *next;
/* filldir passes info to user space */
- de_get(de);
+ pde_get(de);
spin_unlock(&proc_subdir_lock);
if (filldir(dirent, de->name, de->namelen, filp->f_pos,
de->low_ino, de->mode >> 12) < 0) {
- de_put(de);
+ pde_put(de);
goto out;
}
spin_lock(&proc_subdir_lock);
filp->f_pos++;
next = de->next;
- de_put(de);
+ pde_put(de);
de = next;
} while (de);
spin_unlock(&proc_subdir_lock);
@@ -763,7 +763,7 @@ out:
return NULL;
}
-void free_proc_entry(struct proc_dir_entry *de)
+static void free_proc_entry(struct proc_dir_entry *de)
{
unsigned int ino = de->low_ino;
@@ -777,6 +777,12 @@ void free_proc_entry(struct proc_dir_entry *de)
kfree(de);
}
+void pde_put(struct proc_dir_entry *pde)
+{
+ if (atomic_dec_and_test(&pde->count))
+ free_proc_entry(pde);
+}
+
/*
* Remove a /proc entry and free it if it's not currently in use.
*/
@@ -845,6 +851,5 @@ continue_removing:
WARN(de->subdir, KERN_WARNING "%s: removing non-empty directory "
"'%s/%s', leaking at least '%s'\n", __func__,
de->parent->name, de->name, de->subdir->name);
- if (atomic_dec_and_test(&de->count))
- free_proc_entry(de);
+ pde_put(de);
}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index d78ade305541..445a02bcaab3 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -24,29 +24,6 @@
#include "internal.h"
-struct proc_dir_entry *de_get(struct proc_dir_entry *de)
-{
- atomic_inc(&de->count);
- return de;
-}
-
-/*
- * Decrements the use count and checks for deferred deletion.
- */
-void de_put(struct proc_dir_entry *de)
-{
- if (!atomic_read(&de->count)) {
- printk("de_put: entry %s already free!\n", de->name);
- return;
- }
-
- if (atomic_dec_and_test(&de->count))
- free_proc_entry(de);
-}
-
-/*
- * Decrement the use count of the proc_dir_entry.
- */
static void proc_delete_inode(struct inode *inode)
{
struct proc_dir_entry *de;
@@ -59,7 +36,7 @@ static void proc_delete_inode(struct inode *inode)
/* Let go of any associated proc directory entry */
de = PROC_I(inode)->pde;
if (de)
- de_put(de);
+ pde_put(de);
if (PROC_I(inode)->sysctl)
sysctl_head_put(PROC_I(inode)->sysctl);
clear_inode(inode);
@@ -480,7 +457,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
}
unlock_new_inode(inode);
} else
- de_put(de);
+ pde_put(de);
return inode;
}
@@ -495,7 +472,7 @@ int proc_fill_super(struct super_block *s)
s->s_op = &proc_sops;
s->s_time_gran = 1;
- de_get(&proc_root);
+ pde_get(&proc_root);
root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
if (!root_inode)
goto out_no_root;
@@ -509,6 +486,6 @@ int proc_fill_super(struct super_block *s)
out_no_root:
printk("proc_read_super: get root inode failed\n");
iput(root_inode);
- de_put(&proc_root);
+ pde_put(&proc_root);
return -ENOMEM;
}
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 753ca37002c8..1f24a3eddd12 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -61,8 +61,6 @@ extern const struct file_operations proc_pagemap_operations;
extern const struct file_operations proc_net_operations;
extern const struct inode_operations proc_net_inode_operations;
-void free_proc_entry(struct proc_dir_entry *de);
-
void proc_init_inodecache(void);
static inline struct pid *proc_pid(struct inode *inode)
@@ -101,8 +99,12 @@ unsigned long task_vsize(struct mm_struct *);
int task_statm(struct mm_struct *, int *, int *, int *, int *);
void task_mem(struct seq_file *, struct mm_struct *);
-struct proc_dir_entry *de_get(struct proc_dir_entry *de);
-void de_put(struct proc_dir_entry *de);
+static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
+{
+ atomic_inc(&pde->count);
+ return pde;
+}
+void pde_put(struct proc_dir_entry *pde);
extern struct vfsmount *proc_mnt;
int proc_fill_super(struct super_block *);
diff --git a/fs/proc/page.c b/fs/proc/page.c
index 5033ce0d254b..180cf5a0bd67 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -8,6 +8,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/hugetlb.h>
+#include <linux/kernel-page-flags.h>
#include <asm/uaccess.h>
#include "internal.h"
@@ -71,52 +72,12 @@ static const struct file_operations proc_kpagecount_operations = {
* physical page flags.
*/
-/* These macros are used to decouple internal flags from exported ones */
-
-#define KPF_LOCKED 0
-#define KPF_ERROR 1
-#define KPF_REFERENCED 2
-#define KPF_UPTODATE 3
-#define KPF_DIRTY 4
-#define KPF_LRU 5
-#define KPF_ACTIVE 6
-#define KPF_SLAB 7
-#define KPF_WRITEBACK 8
-#define KPF_RECLAIM 9
-#define KPF_BUDDY 10
-
-/* 11-20: new additions in 2.6.31 */
-#define KPF_MMAP 11
-#define KPF_ANON 12
-#define KPF_SWAPCACHE 13
-#define KPF_SWAPBACKED 14
-#define KPF_COMPOUND_HEAD 15
-#define KPF_COMPOUND_TAIL 16
-#define KPF_HUGE 17
-#define KPF_UNEVICTABLE 18
-#define KPF_HWPOISON 19
-#define KPF_NOPAGE 20
-
-#define KPF_KSM 21
-
-/* kernel hacking assistances
- * WARNING: subject to change, never rely on them!
- */
-#define KPF_RESERVED 32
-#define KPF_MLOCKED 33
-#define KPF_MAPPEDTODISK 34
-#define KPF_PRIVATE 35
-#define KPF_PRIVATE_2 36
-#define KPF_OWNER_PRIVATE 37
-#define KPF_ARCH 38
-#define KPF_UNCACHED 39
-
static inline u64 kpf_copy_bit(u64 kflags, int ubit, int kbit)
{
return ((kflags >> kbit) & 1) << ubit;
}
-static u64 get_uflags(struct page *page)
+u64 stable_page_flags(struct page *page)
{
u64 k;
u64 u;
@@ -219,7 +180,7 @@ static ssize_t kpageflags_read(struct file *file, char __user *buf,
else
ppage = NULL;
- if (put_user(get_uflags(ppage), out)) {
+ if (put_user(stable_page_flags(ppage), out)) {
ret = -EFAULT;
break;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.