linux-ext4 - [Bug 12793] ext4 gives wrong errno with too long extended attribute values

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Message-Id: <200908110258.n7B2wJUM022315@demeter.kernel.org>
Date:	Tue, 11 Aug 2009 02:58:19 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 12793] ext4 gives wrong errno with too long extended attribute
 values

http://bugzilla.kernel.org/show_bug.cgi?id=12793


Theodore Tso <tytso@....edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tytso@....edu
         Regression|---                         |No




--- Comment #2 from Theodore Tso <tytso@....edu>  2009-08-11 02:58:18 ---
I'm not convinced this change to use E2BIG instead of ENOSPC is always the
right thing.   Consider the wording of E2BIG: "The value of the given attribute
is too large, IT EXCEEDS THE MAXIMUM ALLOWABLE SIZE OF AN ATTRIBUTE VALUE".  In
other words E2BIG implies that a request was made to create an attribute where
the size exceeded some static value.

So if we pass in a request to create an attribute which is 2MB, E2BIG makes
sense.  On the other hand, if the EA block is almost full, a request to create
an attribute value which is 2 bytes long could result in an error --- and in
that case, ENOSPC makes a lot more sense that E2BIG.

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