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switch non-create side of open() to use of do_last()
Instead of path_lookupat() doing trailing symlink resolution, use the same scheme as on the O_CREAT side. Walk with LOOKUP_PARENT, then (in do_last()) look the final component up, then either open it or return error or, if it's a symlink, give the symlink back to path_openat() to be resolved there. The really messy complication here is RCU. We don't want to drop out of RCU mode before the final lookup, since we don't want to bounce parent directory ->d_count without a good reason. Result is _not_ pretty; later in the series we'll clean it up. For now we are roughly back where we'd been before the revert done by Nick's series - top-level logics of path_openat() is cleaned up, do_last() does actual opening, symlink resolution is done uniformly. Signed-off-by: Al Viro <[email protected]>
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Al Viro
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Mar 14, 2011
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