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fs: Reuse a directory device when accessing the same dir

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At present a new directory device is created for every access to a
directory. This means that a new device is always created when 'ls' is
used.

Where the directory being accessed matches an existing device, this is
not necessary.

Check that path against existing directories and reuse the device if
possible.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-07-12 10:37:15 +02:00
parent 878f27e552
commit 2b66e2f9d3
1 changed files with 29 additions and 1 deletions
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30
fs/fs-uclass.c
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@@ -9,6 +9,7 @@
#include <bootdev.h>
#include <bootmeth.h>
#include <dir.h>
#include <dm.h>
#include <fs.h>
#include <dm/device-internal.h>
@@ -41,8 +42,35 @@ int fs_split_path(const char *fname, char **subdirp, const char **leafp)
int fs_lookup_dir(struct udevice *dev, const char *path, struct udevice **dirp)
{
struct fs_ops *ops = fs_get_ops(dev);
struct udevice *dir;
int ret;
return ops->lookup_dir(dev, path, dirp);
if (!path || !strcmp("/", path))
path = "";
/* see if we already have this directory */
device_foreach_child(dir, dev) {
struct dir_uc_priv *priv;
if (!device_active(dir))
continue;
priv = dev_get_uclass_priv(dir);
log_debug("dir %s '%s' '%s'\n", dir->name, path, priv->path);
if (!strcmp(path, priv->path)) {
*dirp = dir;
log_debug("found: dev '%s'\n", dir->name);
return 0;
}
}
ret = ops->lookup_dir(dev, path, &dir);
if (ret)
return log_msg_ret("fld", ret);
*dirp = dir;
return 0;
}
int fs_mount(struct udevice *dev)