[readdir] convert procfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 54bdc67..f6abbbb 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -213,74 +213,36 @@
return error;
}
-static int proc_ns_fill_cache(struct file *filp, void *dirent,
- filldir_t filldir, struct task_struct *task,
- const struct proc_ns_operations *ops)
+static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx)
{
- return proc_fill_cache(filp, dirent, filldir,
- ops->name, strlen(ops->name),
- proc_ns_instantiate, task, ops);
-}
-
-static int proc_ns_dir_readdir(struct file *filp, void *dirent,
- filldir_t filldir)
-{
- int i;
- struct dentry *dentry = filp->f_path.dentry;
- struct inode *inode = dentry->d_inode;
- struct task_struct *task = get_proc_task(inode);
+ struct task_struct *task = get_proc_task(file_inode(file));
const struct proc_ns_operations **entry, **last;
- ino_t ino;
- int ret;
- ret = -ENOENT;
if (!task)
- goto out_no_task;
+ return -ENOENT;
- ret = 0;
- i = filp->f_pos;
- switch (i) {
- case 0:
- ino = inode->i_ino;
- if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
- goto out;
- i++;
- filp->f_pos++;
- /* fall through */
- case 1:
- ino = parent_ino(dentry);
- if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
- goto out;
- i++;
- filp->f_pos++;
- /* fall through */
- default:
- i -= 2;
- if (i >= ARRAY_SIZE(ns_entries)) {
- ret = 1;
- goto out;
- }
- entry = ns_entries + i;
- last = &ns_entries[ARRAY_SIZE(ns_entries) - 1];
- while (entry <= last) {
- if (proc_ns_fill_cache(filp, dirent, filldir,
- task, *entry) < 0)
- goto out;
- filp->f_pos++;
- entry++;
- }
+ 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++;
}
-
- ret = 1;
out:
put_task_struct(task);
-out_no_task:
- return ret;
+ return 0;
}
const struct file_operations proc_ns_dir_operations = {
.read = generic_read_dir,
- .readdir = proc_ns_dir_readdir,
+ .iterate = proc_ns_dir_readdir,
};
static struct dentry *proc_ns_dir_lookup(struct inode *dir,
