vfs: merge .d_select_inode() into .d_real()

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The two methods essentially do the same: find the real dentry/inode
belonging to an overlay dentry.  The difference is in the usage:

vfs_open() uses ->d_select_inode() and expects the function to perform
copy-up if necessary based on the open flags argument.

file_dentry() uses ->d_real() passing in the overlay dentry as well as the
underlying inode.

vfs_rename() uses ->d_select_inode() but passes zero flags.  ->d_real()
with a zero inode would have worked just as well here.

This patch merges the functionality of ->d_select_inode() into ->d_real()
by adding an 'open_flags' argument to the latter.

[Al Viro] Make the signature of d_real() match that of ->d_real() again.
And constify the inode argument, while we are at it.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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This commit is contained in:

Miklos Szeredi 2016-06-30 08:53:27 +02:00

parent 4c2e07c6a2

commit 2d902671ce

8 changed files with 39 additions and 62 deletions

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28

include/linux/dcache.h

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7

include/linux/fs.h

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