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Commit fb265c9c authored by Theodore Ts'o's avatar Theodore Ts'o
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ext4: add ext4_sb_bread() to disambiguate ENOMEM cases



Today, when sb_bread() returns NULL, this can either be because of an
I/O error or because the system failed to allocate the buffer.  Since
it's an old interface, changing would require changing many call
sites.

So instead we create our own ext4_sb_bread(), which also allows us to
set the REQ_META flag.

Also fixed a problem in the xattr code where a NULL return in a
function could also mean that the xattr was not found, which could
lead to the wrong error getting returned to userspace.

Fixes: ac27a0ec ("ext4: initial copy of files from ext3")
Cc: stable@kernel.org # 2.6.19
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 2e6e902d
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