diff options
Diffstat (limited to 'fs/proc/namespaces.c')
| -rw-r--r-- | fs/proc/namespaces.c | 22 |
1 files changed, 5 insertions, 17 deletions
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 49a7fff2e83..89026095f2b 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -42,12 +42,6 @@ static const struct inode_operations ns_inode_operations = { .setattr = proc_setattr, }; -static int ns_delete_dentry(const struct dentry *dentry) -{ - /* Don't cache namespace inodes when not in use */ - return 1; -} - static char *ns_dname(struct dentry *dentry, char *buffer, int buflen) { struct inode *inode = dentry->d_inode; @@ -59,7 +53,7 @@ static char *ns_dname(struct dentry *dentry, char *buffer, int buflen) const struct dentry_operations ns_dentry_operations = { - .d_delete = ns_delete_dentry, + .d_delete = always_delete_dentry, .d_dname = ns_dname, }; @@ -152,7 +146,7 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl struct task_struct *task; void *ns; char name[50]; - int len = -EACCES; + int res = -EACCES; task = get_proc_task(inode); if (!task) @@ -161,24 +155,18 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl if (!ptrace_may_access(task, PTRACE_MODE_READ)) goto out_put_task; - len = -ENOENT; + res = -ENOENT; ns = ns_ops->get(task); if (!ns) goto out_put_task; snprintf(name, sizeof(name), "%s:[%u]", ns_ops->name, ns_ops->inum(ns)); - len = strlen(name); - - if (len > buflen) - len = buflen; - if (copy_to_user(buffer, name, len)) - len = -EFAULT; - + res = readlink_copy(buffer, buflen, name); ns_ops->put(ns); out_put_task: put_task_struct(task); out: - return len; + return res; } static const struct inode_operations proc_ns_link_inode_operations = { |