From 00a158be83839f2d5370612d633eb2643ddf844e Mon Sep 17 00:00:00 2001 From: Abhi Das Date: Thu, 18 Sep 2014 21:40:28 -0500 Subject: GFS2: fix bad inode i_goal values during block allocation This patch checks if i_goal is either zero or if doesn't exist within any rgrp (i.e gfs2_blk2rgrpd() returns NULL). If so, it assigns the ip->i_no_addr block as the i_goal. There are two scenarios where a bad i_goal can result in a -EBADSLT error. 1. Attempting to allocate to an existing inode: Control reaches gfs2_inplace_reserve() and ip->i_goal is bad. We need to fix i_goal here. 2. A new inode is created in a directory whose i_goal is hosed: In this case, the parent dir's i_goal is copied onto the new inode. Since the new inode is not yet created, the ip->i_no_addr field is invalid and so, the fix in gfs2_inplace_reserve() as per 1) won't work in this scenario. We need to catch and fix it sooner in the parent dir itself (gfs2_create_inode()), before it is copied to the new inode. Signed-off-by: Abhi Das Signed-off-by: Steven Whitehouse --- fs/gfs2/rgrp.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'fs/gfs2/rgrp.c') diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index f4cb9c0d6bbd..55ef72dc5b13 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -577,6 +577,13 @@ struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) return rgd; } +void check_and_update_goal(struct gfs2_inode *ip) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + if (!ip->i_goal || gfs2_blk2rgrpd(sdp, ip->i_goal, 1) == NULL) + ip->i_goal = ip->i_no_addr; +} + void gfs2_free_clones(struct gfs2_rgrpd *rgd) { int x; @@ -1910,6 +1917,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, const struct gfs2_alloc_parms *a } else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) { rs->rs_rbm.rgd = begin = ip->i_rgd; } else { + check_and_update_goal(ip); rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1); } if (S_ISDIR(ip->i_inode.i_mode) && (ap->aflags & GFS2_AF_ORLOV)) -- cgit v1.2.3