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| author | Nicolai Stange <nicstange@gmail.com> | 2017-10-31 02:15:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-07 22:25:02 +0300 |
| commit | 7c8d469877b16d2c1cecf101a0abb7b218db85bc (patch) | |
| tree | a6d2637db3d3d721e0079fd70e9f95ede449b942 /fs/debugfs/internal.h | |
| parent | 2ec16150179888b81717d1d3ce84e634f4736af2 (diff) | |
| download | linux-7c8d469877b16d2c1cecf101a0abb7b218db85bc.tar.xz | |
debugfs: add support for more elaborate ->d_fsdata
Currently, the user provided fops, "real_fops", are stored directly into
->d_fsdata.
In order to be able to store more per-file state and thus prepare for more
granular file removal protection, wrap the real_fops into a dynamically
allocated container struct, debugfs_fsdata.
A struct debugfs_fsdata gets allocated at file creation and freed from the
newly intoduced ->d_release().
Finally, move the implementation of debugfs_real_fops() out of the public
debugfs header such that struct debugfs_fsdata's declaration can be kept
private.
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/debugfs/internal.h')
| -rw-r--r-- | fs/debugfs/internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/debugfs/internal.h b/fs/debugfs/internal.h index b3e8443a1f47..512601eed3ce 100644 --- a/fs/debugfs/internal.h +++ b/fs/debugfs/internal.h @@ -19,4 +19,8 @@ extern const struct file_operations debugfs_noop_file_operations; extern const struct file_operations debugfs_open_proxy_file_operations; extern const struct file_operations debugfs_full_proxy_file_operations; +struct debugfs_fsdata { + const struct file_operations *real_fops; +}; + #endif /* _DEBUGFS_INTERNAL_H_ */ |