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-rw-r--r--fs/proc/base.c22
-rw-r--r--fs/proc/cpuinfo.c6
-rw-r--r--fs/proc/fd.c23
-rw-r--r--fs/proc/meminfo.c7
-rw-r--r--fs/proc/proc_sysctl.c93
-rw-r--r--fs/proc/task_mmu.c9
6 files changed, 111 insertions, 49 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c1031843cc6a..8dfa36a99c74 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3154,6 +3154,22 @@ static int proc_pid_patch_state(struct seq_file *m, struct pid_namespace *ns,
}
#endif /* CONFIG_LIVEPATCH */
+#ifdef CONFIG_KSM
+static int proc_pid_ksm_merging_pages(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
+{
+ struct mm_struct *mm;
+
+ mm = get_task_mm(task);
+ if (mm) {
+ seq_printf(m, "%lu\n", mm->ksm_merging_pages);
+ mmput(mm);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_KSM */
+
#ifdef CONFIG_STACKLEAK_METRICS
static int proc_stack_depth(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
@@ -3285,6 +3301,9 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_SECCOMP_CACHE_DEBUG
ONE("seccomp_cache", S_IRUSR, proc_pid_seccomp_cache),
#endif
+#ifdef CONFIG_KSM
+ ONE("ksm_merging_pages", S_IRUSR, proc_pid_ksm_merging_pages),
+#endif
};
static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -3618,6 +3637,9 @@ static const struct pid_entry tid_base_stuff[] = {
#ifdef CONFIG_SECCOMP_CACHE_DEBUG
ONE("seccomp_cache", S_IRUSR, proc_pid_seccomp_cache),
#endif
+#ifdef CONFIG_KSM
+ ONE("ksm_merging_pages", S_IRUSR, proc_pid_ksm_merging_pages),
+#endif
};
static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
diff --git a/fs/proc/cpuinfo.c b/fs/proc/cpuinfo.c
index 419760fd77bd..f38bda5b83ec 100644
--- a/fs/proc/cpuinfo.c
+++ b/fs/proc/cpuinfo.c
@@ -5,14 +5,10 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-__weak void arch_freq_prepare_all(void)
-{
-}
-
extern const struct seq_operations cpuinfo_op;
+
static int cpuinfo_open(struct inode *inode, struct file *file)
{
- arch_freq_prepare_all();
return seq_open(file, &cpuinfo_op);
}
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 172c86270b31..913bef0d2a36 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -72,7 +72,7 @@ out:
return 0;
}
-static int seq_fdinfo_open(struct inode *inode, struct file *file)
+static int proc_fdinfo_access_allowed(struct inode *inode)
{
bool allowed = false;
struct task_struct *task = get_proc_task(inode);
@@ -86,6 +86,16 @@ static int seq_fdinfo_open(struct inode *inode, struct file *file)
if (!allowed)
return -EACCES;
+ return 0;
+}
+
+static int seq_fdinfo_open(struct inode *inode, struct file *file)
+{
+ int ret = proc_fdinfo_access_allowed(inode);
+
+ if (ret)
+ return ret;
+
return single_open(file, seq_show, inode);
}
@@ -348,12 +358,23 @@ static int proc_readfdinfo(struct file *file, struct dir_context *ctx)
proc_fdinfo_instantiate);
}
+static int proc_open_fdinfo(struct inode *inode, struct file *file)
+{
+ int ret = proc_fdinfo_access_allowed(inode);
+
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
const struct inode_operations proc_fdinfo_inode_operations = {
.lookup = proc_lookupfdinfo,
.setattr = proc_setattr,
};
const struct file_operations proc_fdinfo_operations = {
+ .open = proc_open_fdinfo,
.read = generic_read_dir,
.iterate_shared = proc_readfdinfo,
.llseek = generic_file_llseek,
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 6fa761c9cc78..6e89f0e2fd20 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -86,6 +86,13 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
show_val_kb(m, "SwapTotal: ", i.totalswap);
show_val_kb(m, "SwapFree: ", i.freeswap);
+#ifdef CONFIG_ZSWAP
+ seq_printf(m, "Zswap: %8lu kB\n",
+ (unsigned long)(zswap_pool_total_size >> 10));
+ seq_printf(m, "Zswapped: %8lu kB\n",
+ (unsigned long)atomic_read(&zswap_stored_pages) <<
+ (PAGE_SHIFT - 10));
+#endif
show_val_kb(m, "Dirty: ",
global_node_page_state(NR_FILE_DIRTY));
show_val_kb(m, "Writeback: ",
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 7d9cfc730bd4..021e83fe831f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -19,6 +19,9 @@
#include <linux/kmemleak.h>
#include "internal.h"
+#define list_for_each_table_entry(entry, table) \
+ for ((entry) = (table); (entry)->procname; (entry)++)
+
static const struct dentry_operations proc_sys_dentry_operations;
static const struct file_operations proc_sys_file_operations;
static const struct inode_operations proc_sys_inode_operations;
@@ -26,7 +29,7 @@ static const struct file_operations proc_sys_dir_file_operations;
static const struct inode_operations proc_sys_dir_operations;
/* shared constants to be used in various sysctls */
-const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 3000, INT_MAX, 65535 };
+const int sysctl_vals[] = { 0, 1, 2, 3, 4, 100, 200, 1000, 3000, INT_MAX, 65535, -1 };
EXPORT_SYMBOL(sysctl_vals);
const unsigned long sysctl_long_vals[] = { 0, 1, LONG_MAX };
@@ -215,15 +218,19 @@ static void init_header(struct ctl_table_header *head,
INIT_HLIST_HEAD(&head->inodes);
if (node) {
struct ctl_table *entry;
- for (entry = table; entry->procname; entry++, node++)
+
+ list_for_each_table_entry(entry, table) {
node->header = head;
+ node++;
+ }
}
}
static void erase_header(struct ctl_table_header *head)
{
struct ctl_table *entry;
- for (entry = head->ctl_table; entry->procname; entry++)
+
+ list_for_each_table_entry(entry, head->ctl_table)
erase_entry(head, entry);
}
@@ -248,7 +255,7 @@ static int insert_header(struct ctl_dir *dir, struct ctl_table_header *header)
err = insert_links(header);
if (err)
goto fail_links;
- for (entry = header->ctl_table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, header->ctl_table) {
err = insert_entry(header, entry);
if (err)
goto fail;
@@ -978,7 +985,6 @@ static struct ctl_dir *new_dir(struct ctl_table_set *set,
table = (struct ctl_table *)(node + 1);
new_name = (char *)(table + 2);
memcpy(new_name, name, namelen);
- new_name[namelen] = '\0';
table[0].procname = new_name;
table[0].mode = S_IFDIR|S_IRUGO|S_IXUGO;
init_header(&new->header, set->dir.header.root, set, node, table);
@@ -1130,35 +1136,36 @@ static int sysctl_check_table_array(const char *path, struct ctl_table *table)
static int sysctl_check_table(const char *path, struct ctl_table *table)
{
+ struct ctl_table *entry;
int err = 0;
- for (; table->procname; table++) {
- if (table->child)
- err |= sysctl_err(path, table, "Not a file");
-
- if ((table->proc_handler == proc_dostring) ||
- (table->proc_handler == proc_dointvec) ||
- (table->proc_handler == proc_douintvec) ||
- (table->proc_handler == proc_douintvec_minmax) ||
- (table->proc_handler == proc_dointvec_minmax) ||
- (table->proc_handler == proc_dou8vec_minmax) ||
- (table->proc_handler == proc_dointvec_jiffies) ||
- (table->proc_handler == proc_dointvec_userhz_jiffies) ||
- (table->proc_handler == proc_dointvec_ms_jiffies) ||
- (table->proc_handler == proc_doulongvec_minmax) ||
- (table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
- if (!table->data)
- err |= sysctl_err(path, table, "No data");
- if (!table->maxlen)
- err |= sysctl_err(path, table, "No maxlen");
+ list_for_each_table_entry(entry, table) {
+ if (entry->child)
+ err |= sysctl_err(path, entry, "Not a file");
+
+ if ((entry->proc_handler == proc_dostring) ||
+ (entry->proc_handler == proc_dointvec) ||
+ (entry->proc_handler == proc_douintvec) ||
+ (entry->proc_handler == proc_douintvec_minmax) ||
+ (entry->proc_handler == proc_dointvec_minmax) ||
+ (entry->proc_handler == proc_dou8vec_minmax) ||
+ (entry->proc_handler == proc_dointvec_jiffies) ||
+ (entry->proc_handler == proc_dointvec_userhz_jiffies) ||
+ (entry->proc_handler == proc_dointvec_ms_jiffies) ||
+ (entry->proc_handler == proc_doulongvec_minmax) ||
+ (entry->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
+ if (!entry->data)
+ err |= sysctl_err(path, entry, "No data");
+ if (!entry->maxlen)
+ err |= sysctl_err(path, entry, "No maxlen");
else
- err |= sysctl_check_table_array(path, table);
+ err |= sysctl_check_table_array(path, entry);
}
- if (!table->proc_handler)
- err |= sysctl_err(path, table, "No proc_handler");
+ if (!entry->proc_handler)
+ err |= sysctl_err(path, entry, "No proc_handler");
- if ((table->mode & (S_IRUGO|S_IWUGO)) != table->mode)
- err |= sysctl_err(path, table, "bogus .mode 0%o",
- table->mode);
+ if ((entry->mode & (S_IRUGO|S_IWUGO)) != entry->mode)
+ err |= sysctl_err(path, entry, "bogus .mode 0%o",
+ entry->mode);
}
return err;
}
@@ -1174,7 +1181,7 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
name_bytes = 0;
nr_entries = 0;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
nr_entries++;
name_bytes += strlen(entry->procname) + 1;
}
@@ -1191,14 +1198,16 @@ static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table
node = (struct ctl_node *)(links + 1);
link_table = (struct ctl_table *)(node + nr_entries);
link_name = (char *)&link_table[nr_entries + 1];
+ link = link_table;
- for (link = link_table, entry = table; entry->procname; link++, entry++) {
+ list_for_each_table_entry(entry, table) {
int len = strlen(entry->procname) + 1;
memcpy(link_name, entry->procname, len);
link->procname = link_name;
link->mode = S_IFLNK|S_IRWXUGO;
link->data = link_root;
link_name += len;
+ link++;
}
init_header(links, dir->header.root, dir->header.set, node, link_table);
links->nreg = nr_entries;
@@ -1213,7 +1222,7 @@ static bool get_links(struct ctl_dir *dir,
struct ctl_table *entry, *link;
/* Are there links available for every entry in table? */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
if (!link)
@@ -1226,7 +1235,7 @@ static bool get_links(struct ctl_dir *dir,
}
/* The checks passed. Increase the registration count on the links */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
const char *procname = entry->procname;
link = find_entry(&head, dir, procname, strlen(procname));
head->nreg++;
@@ -1329,11 +1338,11 @@ struct ctl_table_header *__register_sysctl_table(
struct ctl_node *node;
int nr_entries = 0;
- for (entry = table; entry->procname; entry++)
+ list_for_each_table_entry(entry, table)
nr_entries++;
header = kzalloc(sizeof(struct ctl_table_header) +
- sizeof(struct ctl_node)*nr_entries, GFP_KERNEL);
+ sizeof(struct ctl_node)*nr_entries, GFP_KERNEL_ACCOUNT);
if (!header)
return NULL;
@@ -1456,7 +1465,7 @@ static int count_subheaders(struct ctl_table *table)
if (!table || !table->procname)
return 1;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
if (entry->child)
nr_subheaders += count_subheaders(entry->child);
else
@@ -1475,7 +1484,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
int nr_dirs = 0;
int err = -ENOMEM;
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
if (entry->child)
nr_dirs++;
else
@@ -1492,7 +1501,9 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
goto out;
ctl_table_arg = files;
- for (new = files, entry = table; entry->procname; entry++) {
+ new = files;
+
+ list_for_each_table_entry(entry, table) {
if (entry->child)
continue;
*new = *entry;
@@ -1516,7 +1527,7 @@ static int register_leaf_sysctl_tables(const char *path, char *pos,
}
/* Recurse into the subdirectories. */
- for (entry = table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, table) {
char *child_pos;
if (!entry->child)
@@ -1670,7 +1681,7 @@ static void put_links(struct ctl_table_header *header)
if (IS_ERR(core_parent))
return;
- for (entry = header->ctl_table; entry->procname; entry++) {
+ list_for_each_table_entry(entry, header->ctl_table) {
struct ctl_table_header *link_head;
struct ctl_table *link;
const char *name = entry->procname;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index f46060eb91b5..2d04e3470d4c 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1421,6 +1421,8 @@ static pagemap_entry_t pte_to_pagemap_entry(struct pagemapread *pm,
migration = is_migration_entry(entry);
if (is_pfn_swap_entry(entry))
page = pfn_swap_entry_to_page(entry);
+ if (pte_marker_entry_uffd_wp(entry))
+ flags |= PM_UFFD_WP;
}
if (page && !PageAnon(page))
@@ -1556,10 +1558,15 @@ static int pagemap_hugetlb_range(pte_t *ptep, unsigned long hmask,
if (page_mapcount(page) == 1)
flags |= PM_MMAP_EXCLUSIVE;
+ if (huge_pte_uffd_wp(pte))
+ flags |= PM_UFFD_WP;
+
flags |= PM_PRESENT;
if (pm->show_pfn)
frame = pte_pfn(pte) +
((addr & ~hmask) >> PAGE_SHIFT);
+ } else if (pte_swp_uffd_wp_any(pte)) {
+ flags |= PM_UFFD_WP;
}
for (; addr != end; addr += PAGE_SIZE) {
@@ -1873,8 +1880,6 @@ static int gather_hugetlb_stats(pte_t *pte, unsigned long hmask,
return 0;
page = pte_page(huge_pte);
- if (!page)
- return 0;
md = walk->private;
gather_stats(page, md, pte_dirty(huge_pte), 1);
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 23:27:06 +0000