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Subject[PATCH 10/23] fs: Rename fs/proc/namespaces.c into fs/proc/task_namespaces.c
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This file is about task namespaces, so we rename it.
No functional changes.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
fs/proc/Makefile | 2
fs/proc/internal.h | 2
fs/proc/namespaces.c | 183 ---------------------------------------------
fs/proc/task_namespaces.c | 183 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 185 insertions(+), 185 deletions(-)
delete mode 100644 fs/proc/namespaces.c
create mode 100644 fs/proc/task_namespaces.c

diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index bd08616ed8ba..dc2d51f42905 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -24,7 +24,7 @@ proc-y += uptime.o
proc-y += util.o
proc-y += version.o
proc-y += softirqs.o
-proc-y += namespaces.o
+proc-y += task_namespaces.o
proc-y += self.o
proc-y += thread_self.o
proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 917cc85e3466..572757ff97be 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -223,7 +223,7 @@ extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry
extern void proc_entry_rundown(struct proc_dir_entry *);

/*
- * proc_namespaces.c
+ * task_namespaces.c
*/
extern const struct inode_operations proc_ns_dir_inode_operations;
extern const struct file_operations proc_ns_dir_operations;
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
deleted file mode 100644
index 8e159fc78c0a..000000000000
--- a/fs/proc/namespaces.c
+++ /dev/null
@@ -1,183 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/proc_fs.h>
-#include <linux/nsproxy.h>
-#include <linux/ptrace.h>
-#include <linux/namei.h>
-#include <linux/file.h>
-#include <linux/utsname.h>
-#include <net/net_namespace.h>
-#include <linux/ipc_namespace.h>
-#include <linux/pid_namespace.h>
-#include <linux/user_namespace.h>
-#include "internal.h"
-
-
-static const struct proc_ns_operations *ns_entries[] = {
-#ifdef CONFIG_NET_NS
- &netns_operations,
-#endif
-#ifdef CONFIG_UTS_NS
- &utsns_operations,
-#endif
-#ifdef CONFIG_IPC_NS
- &ipcns_operations,
-#endif
-#ifdef CONFIG_PID_NS
- &pidns_operations,
- &pidns_for_children_operations,
-#endif
-#ifdef CONFIG_USER_NS
- &userns_operations,
-#endif
- &mntns_operations,
-#ifdef CONFIG_CGROUPS
- &cgroupns_operations,
-#endif
-#ifdef CONFIG_TIME_NS
- &timens_operations,
- &timens_for_children_operations,
-#endif
-};
-
-static const char *proc_ns_get_link(struct dentry *dentry,
- struct inode *inode,
- struct delayed_call *done)
-{
- const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
- struct task_struct *task;
- struct path ns_path;
- int error = -EACCES;
-
- if (!dentry)
- return ERR_PTR(-ECHILD);
-
- task = get_proc_task(inode);
- if (!task)
- return ERR_PTR(-EACCES);
-
- if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
- goto out;
-
- error = ns_get_path(&ns_path, task, ns_ops);
- if (error)
- goto out;
-
- error = nd_jump_link(&ns_path);
-out:
- put_task_struct(task);
- return ERR_PTR(error);
-}
-
-static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int buflen)
-{
- struct inode *inode = d_inode(dentry);
- const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
- struct task_struct *task;
- char name[50];
- int res = -EACCES;
-
- task = get_proc_task(inode);
- if (!task)
- return res;
-
- if (ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
- res = ns_get_name(name, sizeof(name), task, ns_ops);
- if (res >= 0)
- res = readlink_copy(buffer, buflen, name);
- }
- put_task_struct(task);
- return res;
-}
-
-static const struct inode_operations proc_ns_link_inode_operations = {
- .readlink = proc_ns_readlink,
- .get_link = proc_ns_get_link,
- .setattr = proc_setattr,
-};
-
-static struct dentry *proc_ns_instantiate(struct dentry *dentry,
- struct task_struct *task, const void *ptr)
-{
- const struct proc_ns_operations *ns_ops = ptr;
- struct inode *inode;
- struct proc_inode *ei;
-
- inode = proc_pid_make_inode(dentry->d_sb, task, S_IFLNK | S_IRWXUGO);
- if (!inode)
- return ERR_PTR(-ENOENT);
-
- ei = PROC_I(inode);
- inode->i_op = &proc_ns_link_inode_operations;
- ei->ns_ops = ns_ops;
- pid_update_inode(task, inode);
-
- d_set_d_op(dentry, &pid_dentry_operations);
- return d_splice_alias(inode, dentry);
-}
-
-static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx)
-{
- struct task_struct *task = get_proc_task(file_inode(file));
- const struct proc_ns_operations **entry, **last;
-
- if (!task)
- return -ENOENT;
-
- if (!dir_emit_dots(file, ctx))
- goto out;
- if (ctx->pos >= 2 + ARRAY_SIZE(ns_entries))
- goto out;
- entry = ns_entries + (ctx->pos - 2);
- last = &ns_entries[ARRAY_SIZE(ns_entries) - 1];
- while (entry <= last) {
- const struct proc_ns_operations *ops = *entry;
- if (!proc_fill_cache(file, ctx, ops->name, strlen(ops->name),
- proc_ns_instantiate, task, ops))
- break;
- ctx->pos++;
- entry++;
- }
-out:
- put_task_struct(task);
- return 0;
-}
-
-const struct file_operations proc_ns_dir_operations = {
- .read = generic_read_dir,
- .iterate_shared = proc_ns_dir_readdir,
- .llseek = generic_file_llseek,
-};
-
-static struct dentry *proc_ns_dir_lookup(struct inode *dir,
- struct dentry *dentry, unsigned int flags)
-{
- struct task_struct *task = get_proc_task(dir);
- const struct proc_ns_operations **entry, **last;
- unsigned int len = dentry->d_name.len;
- struct dentry *res = ERR_PTR(-ENOENT);
-
- if (!task)
- goto out_no_task;
-
- last = &ns_entries[ARRAY_SIZE(ns_entries)];
- for (entry = ns_entries; entry < last; entry++) {
- if (strlen((*entry)->name) != len)
- continue;
- if (!memcmp(dentry->d_name.name, (*entry)->name, len))
- break;
- }
- if (entry == last)
- goto out;
-
- res = proc_ns_instantiate(dentry, task, *entry);
-out:
- put_task_struct(task);
-out_no_task:
- return res;
-}
-
-const struct inode_operations proc_ns_dir_inode_operations = {
- .lookup = proc_ns_dir_lookup,
- .getattr = pid_getattr,
- .setattr = proc_setattr,
-};
diff --git a/fs/proc/task_namespaces.c b/fs/proc/task_namespaces.c
new file mode 100644
index 000000000000..8e159fc78c0a
--- /dev/null
+++ b/fs/proc/task_namespaces.c
@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/proc_fs.h>
+#include <linux/nsproxy.h>
+#include <linux/ptrace.h>
+#include <linux/namei.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <net/net_namespace.h>
+#include <linux/ipc_namespace.h>
+#include <linux/pid_namespace.h>
+#include <linux/user_namespace.h>
+#include "internal.h"
+
+
+static const struct proc_ns_operations *ns_entries[] = {
+#ifdef CONFIG_NET_NS
+ &netns_operations,
+#endif
+#ifdef CONFIG_UTS_NS
+ &utsns_operations,
+#endif
+#ifdef CONFIG_IPC_NS
+ &ipcns_operations,
+#endif
+#ifdef CONFIG_PID_NS
+ &pidns_operations,
+ &pidns_for_children_operations,
+#endif
+#ifdef CONFIG_USER_NS
+ &userns_operations,
+#endif
+ &mntns_operations,
+#ifdef CONFIG_CGROUPS
+ &cgroupns_operations,
+#endif
+#ifdef CONFIG_TIME_NS
+ &timens_operations,
+ &timens_for_children_operations,
+#endif
+};
+
+static const char *proc_ns_get_link(struct dentry *dentry,
+ struct inode *inode,
+ struct delayed_call *done)
+{
+ const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
+ struct task_struct *task;
+ struct path ns_path;
+ int error = -EACCES;
+
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
+
+ task = get_proc_task(inode);
+ if (!task)
+ return ERR_PTR(-EACCES);
+
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
+ goto out;
+
+ error = ns_get_path(&ns_path, task, ns_ops);
+ if (error)
+ goto out;
+
+ error = nd_jump_link(&ns_path);
+out:
+ put_task_struct(task);
+ return ERR_PTR(error);
+}
+
+static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int buflen)
+{
+ struct inode *inode = d_inode(dentry);
+ const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
+ struct task_struct *task;
+ char name[50];
+ int res = -EACCES;
+
+ task = get_proc_task(inode);
+ if (!task)
+ return res;
+
+ if (ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
+ res = ns_get_name(name, sizeof(name), task, ns_ops);
+ if (res >= 0)
+ res = readlink_copy(buffer, buflen, name);
+ }
+ put_task_struct(task);
+ return res;
+}
+
+static const struct inode_operations proc_ns_link_inode_operations = {
+ .readlink = proc_ns_readlink,
+ .get_link = proc_ns_get_link,
+ .setattr = proc_setattr,
+};
+
+static struct dentry *proc_ns_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
+{
+ const struct proc_ns_operations *ns_ops = ptr;
+ struct inode *inode;
+ struct proc_inode *ei;
+
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFLNK | S_IRWXUGO);
+ if (!inode)
+ return ERR_PTR(-ENOENT);
+
+ ei = PROC_I(inode);
+ inode->i_op = &proc_ns_link_inode_operations;
+ ei->ns_ops = ns_ops;
+ pid_update_inode(task, inode);
+
+ d_set_d_op(dentry, &pid_dentry_operations);
+ return d_splice_alias(inode, dentry);
+}
+
+static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx)
+{
+ struct task_struct *task = get_proc_task(file_inode(file));
+ const struct proc_ns_operations **entry, **last;
+
+ if (!task)
+ return -ENOENT;
+
+ if (!dir_emit_dots(file, ctx))
+ goto out;
+ if (ctx->pos >= 2 + ARRAY_SIZE(ns_entries))
+ goto out;
+ entry = ns_entries + (ctx->pos - 2);
+ last = &ns_entries[ARRAY_SIZE(ns_entries) - 1];
+ while (entry <= last) {
+ const struct proc_ns_operations *ops = *entry;
+ if (!proc_fill_cache(file, ctx, ops->name, strlen(ops->name),
+ proc_ns_instantiate, task, ops))
+ break;
+ ctx->pos++;
+ entry++;
+ }
+out:
+ put_task_struct(task);
+ return 0;
+}
+
+const struct file_operations proc_ns_dir_operations = {
+ .read = generic_read_dir,
+ .iterate_shared = proc_ns_dir_readdir,
+ .llseek = generic_file_llseek,
+};
+
+static struct dentry *proc_ns_dir_lookup(struct inode *dir,
+ struct dentry *dentry, unsigned int flags)
+{
+ struct task_struct *task = get_proc_task(dir);
+ const struct proc_ns_operations **entry, **last;
+ unsigned int len = dentry->d_name.len;
+ struct dentry *res = ERR_PTR(-ENOENT);
+
+ if (!task)
+ goto out_no_task;
+
+ last = &ns_entries[ARRAY_SIZE(ns_entries)];
+ for (entry = ns_entries; entry < last; entry++) {
+ if (strlen((*entry)->name) != len)
+ continue;
+ if (!memcmp(dentry->d_name.name, (*entry)->name, len))
+ break;
+ }
+ if (entry == last)
+ goto out;
+
+ res = proc_ns_instantiate(dentry, task, *entry);
+out:
+ put_task_struct(task);
+out_no_task:
+ return res;
+}
+
+const struct inode_operations proc_ns_dir_inode_operations = {
+ .lookup = proc_ns_dir_lookup,
+ .getattr = pid_getattr,
+ .setattr = proc_setattr,
+};

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