83021b47c2
In the case where a variable-sized SA overlaps the spill block pointer and a new variable-sized SA is being added, the header size was improperly calculated to include the to-be-moved SA. This problem could be reproduced when xattr=sa enabled as follows: ln -s $(perl -e 'print "x" x 120') blah setfattr -n security.selinux -v blahblah -h blah The symlink is large enough to interfere with the spill block pointer and has a typical SA registration as follows (shown in modified "zdb -dddd" <SA attr layout obj> format): [ ... ZPL_DACL_COUNT ZPL_DACL_ACES ZPL_SYMLINK ] Adding the SA xattr will attempt to extend the registration to: [ ... ZPL_DACL_COUNT ZPL_DACL_ACES ZPL_SYMLINK ZPL_DXATTR ] but since the ZPL_SYMLINK SA interferes with the spill block pointer, it must also be moved to the spill block which will have a registration of: [ ZPL_SYMLINK ZPL_DXATTR ] This commit updates extra_hdrsize when this condition occurs, allowing hdrsize to be subsequently decreased appropriately. Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Issue #2214 Issue #2228 Issue #2316 Issue #2343 |
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