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authorAl Viro <viro@zeniv.linux.org.uk>2014-11-01 10:13:17 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2014-12-04 22:34:54 +0300
commitf77c80142e1afe6d5c16975ca5d7d1fc324b16f9 (patch)
treec2c8f726402610aee77ccca0627a4c38f944640b /fs/proc
parent33c429405a2c8d9e42afb9fee88a63cfb2de1e98 (diff)
downloadlinux-f77c80142e1afe6d5c16975ca5d7d1fc324b16f9.tar.xz
bury struct proc_ns in fs/proc
a) make get_proc_ns() return a pointer to struct ns_common b) mirror ns_ops in dentry->d_fsdata of ns dentries, so that is_mnt_ns_file() could get away with fewer dereferences. That way struct proc_ns becomes invisible outside of fs/proc/*.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/internal.h5
-rw-r--r--fs/proc/namespaces.c7
2 files changed, 9 insertions, 3 deletions
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index aa7a0ee182e1..0fabc48d905f 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -57,6 +57,11 @@ union proc_op {
struct task_struct *task);
};
+struct proc_ns {
+ struct ns_common *ns;
+ const struct proc_ns_operations *ns_ops;
+};
+
struct proc_inode {
struct pid *pid;
int fd;
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 995e8e98237d..18fc1cf899de 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -45,7 +45,7 @@ static const struct inode_operations ns_inode_operations = {
static char *ns_dname(struct dentry *dentry, char *buffer, int buflen)
{
struct inode *inode = dentry->d_inode;
- const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns.ns_ops;
+ const struct proc_ns_operations *ns_ops = dentry->d_fsdata;
return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]",
ns_ops->name, inode->i_ino);
@@ -75,6 +75,7 @@ static struct dentry *proc_ns_get_dentry(struct super_block *sb,
ns_ops->put(ns);
return ERR_PTR(-ENOMEM);
}
+ dentry->d_fsdata = (void *)ns_ops;
inode = iget_locked(sb, ns->inum);
if (!inode) {
@@ -286,9 +287,9 @@ out_invalid:
return ERR_PTR(-EINVAL);
}
-struct proc_ns *get_proc_ns(struct inode *inode)
+struct ns_common *get_proc_ns(struct inode *inode)
{
- return &PROC_I(inode)->ns;
+ return PROC_I(inode)->ns.ns;
}
bool proc_ns_inode(struct inode *inode)