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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-17 19:16:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-17 19:16:12 -0800 |
| commit | 231753ef780012eb6f3922c3dfc0a7186baa33c2 (patch) | |
| tree | c580186402ac9c5d7392ba4516dd3c88588807ba /Documentation | |
| parent | 0110c350c86d511be2130cb2a30dcbb76c4af750 (diff) | |
| parent | d16744ec8ad011793144bb932ce822cc0c1733cb (diff) | |
| download | lwn-231753ef780012eb6f3922c3dfc0a7186baa33c2.tar.gz lwn-231753ef780012eb6f3922c3dfc0a7186baa33c2.zip | |
Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull partial readlink cleanups from Miklos Szeredi.
This is the uncontroversial part of the readlink cleanup patch-set that
simplifies the default readlink handling.
Miklos and Al are still discussing the rest of the series.
* git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
vfs: make generic_readlink() static
vfs: remove ".readlink = generic_readlink" assignments
vfs: default to generic_readlink()
vfs: replace calling i_op->readlink with vfs_readlink()
proc/self: use generic_readlink
ecryptfs: use vfs_get_link()
bad_inode: add missing i_op initializers
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/porting | 4 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 9 |
2 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index bdd025ceb763..95280079c0b3 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting @@ -596,3 +596,7 @@ in your dentry operations instead. [mandatory] ->rename() has an added flags argument. Any flags not handled by the filesystem should result in EINVAL being returned. +-- +[recommended] + ->readlink is optional for symlinks. Don't set, unless filesystem needs + to fake something for readlink(2). diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 3893f4d44cd4..b968084eeac1 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -451,9 +451,6 @@ otherwise noted. exist; this is checked by the VFS. Unlike plain rename, source and target may be of different type. - readlink: called by the readlink(2) system call. Only required if - you want to support reading symbolic links - get_link: called by the VFS to follow a symbolic link to the inode it points to. Only required if you want to support symbolic links. This method returns the symlink body @@ -468,6 +465,12 @@ otherwise noted. argument. If request can't be handled without leaving RCU mode, have it return ERR_PTR(-ECHILD). + readlink: this is now just an override for use by readlink(2) for the + cases when ->get_link uses nd_jump_link() or object is not in + fact a symlink. Normally filesystems should only implement + ->get_link for symlinks and readlink(2) will automatically use + that. + permission: called by the VFS to check for access rights on a POSIX-like filesystem. |