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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2021-04-01 22:03:41 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2021-04-07 13:57:13 -0400 |
| commit | bcba1e7d0d520adba895d9e0800a056f734b0a6a (patch) | |
| tree | e8dadedb7fc63a9a69db24db6b9bc9dec58145a0 /Documentation/filesystems | |
| parent | switch file_open_root() to struct path (diff) | |
| download | linux-dev-bcba1e7d0d520adba895d9e0800a056f734b0a6a.tar.xz linux-dev-bcba1e7d0d520adba895d9e0800a056f734b0a6a.zip | |
take LOOKUP_{ROOT,ROOT_GRABBED,JUMPED} out of LOOKUP_... space
Separate field in nameidata (nd->state) holding the flags that
should be internal-only - that way we both get some spare bits
in LOOKUP_... and get simpler rules for nd->root lifetime rules,
since we can set the replacement of LOOKUP_ROOT (ND_ROOT_PRESET)
at the same time we set nd->root.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/path-lookup.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/path-lookup.rst b/Documentation/filesystems/path-lookup.rst index c482e1619e77..ede67f705787 100644 --- a/Documentation/filesystems/path-lookup.rst +++ b/Documentation/filesystems/path-lookup.rst @@ -1321,18 +1321,18 @@ to lookup: RCU-walk, REF-walk, and REF-walk with forced revalidation. yet. This is primarily used to tell the audit subsystem the full context of a particular access being audited. -``LOOKUP_ROOT`` indicates that the ``root`` field in the ``nameidata`` was +``ND_ROOT_PRESET`` indicates that the ``root`` field in the ``nameidata`` was provided by the caller, so it shouldn't be released when it is no longer needed. -``LOOKUP_JUMPED`` means that the current dentry was chosen not because +``ND_JUMPED`` means that the current dentry was chosen not because it had the right name but for some other reason. This happens when following "``..``", following a symlink to ``/``, crossing a mount point or accessing a "``/proc/$PID/fd/$FD``" symlink (also known as a "magic link"). In this case the filesystem has not been asked to revalidate the name (with ``d_revalidate()``). In such cases the inode may still need to be revalidated, so ``d_op->d_weak_revalidate()`` is called if -``LOOKUP_JUMPED`` is set when the look completes - which may be at the +``ND_JUMPED`` is set when the look completes - which may be at the final component or, when creating, unlinking, or renaming, at the penultimate component. Resolution-restriction flags |