From: Dmitry Monakhov Date: Mon, 14 Dec 2009 12:21:13 +0000 (+0300) Subject: quota: decouple fs reserved space from quota reservation X-Git-Tag: v2.6.33-rc2~18^2~11 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd8fbfc1709822bd94247c5b2ab15a5f5041e103;p=pandora-kernel.git quota: decouple fs reserved space from quota reservation Currently inode_reservation is managed by fs itself and this reservation is transfered on dquot_transfer(). This means what inode_reservation must always be in sync with dquot->dq_dqb.dqb_rsvspace. Otherwise dquot_transfer() will result in incorrect quota(WARN_ON in dquot_claim_reserved_space() will be triggered) This is not easy because of complex locking order issues for example http://bugzilla.kernel.org/show_bug.cgi?id=14739 The patch introduce quota reservation field for each fs-inode (fs specific inode is used in order to prevent bloating generic vfs inode). This reservation is managed by quota code internally similar to i_blocks/i_bytes and may not be always in sync with internal fs reservation. Also perform some code rearrangement: - Unify dquot_reserve_space() and dquot_reserve_space() - Unify dquot_release_reserved_space() and dquot_free_space() - Also this patch add missing warning update to release_rsv() dquot_release_reserved_space() must call flush_warnings() as dquot_free_space() does. Signed-off-by: Dmitry Monakhov Signed-off-by: Jan Kara --- Reading git-diff-tree failed