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GFS2: Only do one directory search on create
Creation of a new inode requires a directory search in order to ensure that we are not trying to create an inode with the same name as an existing one. This was hidden away inside the create_ok() function. In the case that there was an existing inode, and a lookup can be substituted for a create (which is the case with regular files when the O_EXCL flag is not in use) then we were doing a second lookup in order to return the inode. This patch merges these two lookups into one. This can be done by passing a flag to gfs2_dir_search() to tell it to just return -EEXIST in the cases where we don't actually want to look up the inode. Signed-off-by: Steven Whitehouse <[email protected]>
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