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-rw-r--r--fs/proc/base.c51
1 files changed, 28 insertions, 23 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 437195f204e..2772208338f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1427,16 +1427,19 @@ static int proc_exe_link(struct dentry *dentry, struct path *exe_path)
static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
+ struct path path;
int error = -EACCES;
- /* We don't need a base pointer in the /proc filesystem */
- path_put(&nd->path);
-
/* Are we allowed to snoop on the tasks file descriptors? */
if (!proc_fd_access_allowed(inode))
goto out;
- error = PROC_I(inode)->op.proc_get_link(dentry, &nd->path);
+ error = PROC_I(inode)->op.proc_get_link(dentry, &path);
+ if (error)
+ goto out;
+
+ nd_jump_link(nd, &path);
+ return NULL;
out:
return ERR_PTR(error);
}
@@ -1601,13 +1604,13 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
* made this apply to all per process world readable and executable
* directories.
*/
-int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
+int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
const struct cred *cred;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@@ -1781,7 +1784,7 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
return proc_fd_info(dentry->d_inode, path, NULL);
}
-static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
@@ -1789,7 +1792,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
struct files_struct *files;
const struct cred *cred;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@@ -1868,7 +1871,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, NULL))
+ if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@@ -1956,7 +1959,7 @@ out_no_task:
}
static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
return proc_lookupfd_common(dir, dentry, proc_fd_instantiate);
}
@@ -2003,7 +2006,7 @@ static int dname_to_vma_addr(struct dentry *dentry,
return 0;
}
-static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
{
unsigned long vm_start, vm_end;
bool exact_vma_exists = false;
@@ -2013,7 +2016,7 @@ static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
struct inode *inode;
int status = 0;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
if (!capable(CAP_SYS_ADMIN)) {
@@ -2145,7 +2148,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
}
static struct dentry *proc_map_files_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
unsigned long vm_start, vm_end;
struct vm_area_struct *vma;
@@ -2371,7 +2374,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, NULL))
+ if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@@ -2380,7 +2383,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
static struct dentry *proc_lookupfdinfo(struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
return proc_lookupfd_common(dir, dentry, proc_fdinfo_instantiate);
}
@@ -2430,7 +2433,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
@@ -2630,7 +2633,7 @@ static const struct file_operations proc_attr_dir_operations = {
};
static struct dentry *proc_attr_dir_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
return proc_pident_lookup(dir, dentry,
attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
@@ -3114,7 +3117,8 @@ static const struct file_operations proc_tgid_base_operations = {
.llseek = default_llseek,
};
-static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
return proc_pident_lookup(dir, dentry,
tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}
@@ -3237,13 +3241,13 @@ 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, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
}
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
struct dentry *result;
struct task_struct *task;
@@ -3470,7 +3474,8 @@ static int proc_tid_base_readdir(struct file * filp,
tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
}
-static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
return proc_pident_lookup(dir, dentry,
tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}
@@ -3508,13 +3513,13 @@ 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, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
}
-static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
struct dentry *result = ERR_PTR(-ENOENT);
struct task_struct *task;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 02:58:59 +0000