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[GFS2] fix inode meta data corruption 

Fix a nasty inode meta data corruption issue by keeping the buffer head in
icache array. This buffer needs to stay in memory until journal flush occurs
Otherwise, gfs2_meta_inode_buffer could do a disk read before the inode hits
disk. It ends up with meta data corruptions. The buffer will be released as
part of the existing journal flush logic.

Signed-off-by: S. Wendy Cheng <wcheng@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Wendy Cheng 2007-08-24 09:15:01 -04:00 committed by Steven Whitehouse
parent c4f68a130f
commit e9bd2b3baf
1 changed files with 15 additions and 5 deletions
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20
fs/gfs2/inode.c
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@ -244,6 +244,11 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
return 0;
}
static void gfs2_inode_bh(struct gfs2_inode *ip, struct buffer_head *bh)
{
ip->i_cache[0] = bh;
}
/**
* gfs2_inode_refresh - Refresh the incore copy of the dinode
* @ip: The GFS2 inode
@ -688,7 +693,7 @@ out:
static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
const struct gfs2_inum_host *inum, unsigned int mode,
unsigned int uid, unsigned int gid,
const u64 *generation, dev_t dev)
const u64 *generation, dev_t dev, struct buffer_head **bhp)
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_dinode *di;
@ -743,13 +748,15 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
memset(&di->di_reserved, 0, sizeof(di->di_reserved));
set_buffer_uptodate(dibh);
brelse(dibh);
*bhp = dibh;
}
static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
unsigned int mode, const struct gfs2_inum_host *inum,
const u64 *generation, dev_t dev)
const u64 *generation, dev_t dev, struct buffer_head **bhp)
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
unsigned int uid, gid;
@ -770,7 +777,7 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
if (error)
goto out_quota;
init_dinode(dip, gl, inum, mode, uid, gid, generation, dev);
init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
gfs2_quota_change(dip, +1, uid, gid);
gfs2_trans_end(sdp);
@ -909,6 +916,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
int error;
u64 generation;
struct buffer_head *bh=NULL;
if (!name->len || name->len > GFS2_FNAMESIZE)
return ERR_PTR(-ENAMETOOLONG);
@ -935,7 +943,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
if (error)
goto fail_gunlock;
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev);
error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
if (error)
goto fail_gunlock2;
@ -945,6 +953,8 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
if (IS_ERR(inode))
goto fail_gunlock2;
gfs2_inode_bh(GFS2_I(inode), bh);
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_gunlock2;