提交 00a158be 编写于 作者: A Abhi Das 提交者: Steven Whitehouse

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: NAbhi Das <adas@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
上级 37504a3b
...@@ -672,6 +672,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, ...@@ -672,6 +672,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
gfs2_set_inode_blocks(inode, 1); gfs2_set_inode_blocks(inode, 1);
munge_mode_uid_gid(dip, inode); munge_mode_uid_gid(dip, inode);
check_and_update_goal(dip);
ip->i_goal = dip->i_goal; ip->i_goal = dip->i_goal;
ip->i_diskflags = 0; ip->i_diskflags = 0;
ip->i_eattr = 0; ip->i_eattr = 0;
......
...@@ -577,6 +577,13 @@ struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) ...@@ -577,6 +577,13 @@ struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd)
return 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) void gfs2_free_clones(struct gfs2_rgrpd *rgd)
{ {
int x; int x;
...@@ -1910,6 +1917,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, const struct gfs2_alloc_parms *a ...@@ -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)) { } else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) {
rs->rs_rbm.rgd = begin = ip->i_rgd; rs->rs_rbm.rgd = begin = ip->i_rgd;
} else { } else {
check_and_update_goal(ip);
rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1); 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)) if (S_ISDIR(ip->i_inode.i_mode) && (ap->aflags & GFS2_AF_ORLOV))
......
...@@ -80,4 +80,5 @@ static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs) ...@@ -80,4 +80,5 @@ static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
return rs && !RB_EMPTY_NODE(&rs->rs_node); return rs && !RB_EMPTY_NODE(&rs->rs_node);
} }
extern void check_and_update_goal(struct gfs2_inode *ip);
#endif /* __RGRP_DOT_H__ */ #endif /* __RGRP_DOT_H__ */
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