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Steven Whitehouse 04-05-2012 09:45 AM

GFS2: Make sure rindex is uptodate before starting transactions
 
Hi,

Now in the -nmw and -fixes tree. Thanks,

Steve.

On Wed, 2012-04-04 at 22:11 -0400, Bob Peterson wrote:
> Hi,
>
> This patch removes the call from gfs2_blk2rgrd to function
> gfs2_rindex_update and replaces it with individual calls.
> The former way turned out to be too problematic.
>
> Regards,
>
> Bob Peterson
> Red Hat File Systems
>
> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
> --
> Author: Bob Peterson <rpeterso@redhat.com>
> Date: Wed Apr 4 22:04:57 2012 -0500
>
> GFS2: Make sure rindex is uptodate before starting transactions
>
> This patch checks to make sure rindex is uptodate (all the rgrps are
> read in properly) in case gfs2_grow adds some. It replaces the call
> from gfs2_blk2rgrd which was too frought with danger.
>
> diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
> index 197c5c4..03c04fe 100644
> --- a/fs/gfs2/bmap.c
> +++ b/fs/gfs2/bmap.c
> @@ -724,7 +724,11 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
> int metadata;
> unsigned int revokes = 0;
> int x;
> - int error = 0;
> + int error;
> +
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
>
> if (!*top)
> sm->sm_first = 0;
> diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
> index c35573a..a836056 100644
> --- a/fs/gfs2/dir.c
> +++ b/fs/gfs2/dir.c
> @@ -1844,6 +1844,10 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
> unsigned int x, size = len * sizeof(u64);
> int error;
>
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
>
> ht = kzalloc(size, GFP_NOFS);
> diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
> index c98a60e..a9ba244 100644
> --- a/fs/gfs2/inode.c
> +++ b/fs/gfs2/inode.c
> @@ -1031,7 +1031,13 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
> struct buffer_head *bh;
> struct gfs2_holder ghs[3];
> struct gfs2_rgrpd *rgd;
> - int error = -EROFS;
> + int error;
> +
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> + error = -EROFS;
>
> gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
> gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
> @@ -1224,6 +1230,10 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
> return 0;
> }
>
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> if (odip != ndip) {
> error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
> 0, &r_gh);
> @@ -1345,7 +1355,6 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
> error = alloc_required;
> if (error < 0)
> goto out_gunlock;
> - error = 0;
>
> if (alloc_required) {
> struct gfs2_qadata *qa = gfs2_qadata_get(ndip);
> diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
> index 19354a2..3df65c9 100644
> --- a/fs/gfs2/rgrp.c
> +++ b/fs/gfs2/rgrp.c
> @@ -332,9 +332,6 @@ struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact)
> struct rb_node *n, *next;
> struct gfs2_rgrpd *cur;
>
> - if (gfs2_rindex_update(sdp))
> - return NULL;
> -
> spin_lock(&sdp->sd_rindex_spin);
> n = sdp->sd_rindex_tree.rb_node;
> while (n) {
> @@ -928,6 +925,10 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
> } else if (copy_from_user(&r, argp, sizeof(r)))
> return -EFAULT;
>
> + ret = gfs2_rindex_update(sdp);
> + if (ret)
> + return ret;
> +
> rgd = gfs2_blk2rgrpd(sdp, r.start, 0);
> rgd_end = gfs2_blk2rgrpd(sdp, r.start + r.len, 0);
>
> diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
> index 2e5ba42..927f4df 100644
> --- a/fs/gfs2/xattr.c
> +++ b/fs/gfs2/xattr.c
> @@ -238,6 +238,10 @@ static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
> unsigned int x;
> int error;
>
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> if (GFS2_EA_IS_STUFFED(ea))
> return 0;
>
> @@ -1330,6 +1334,10 @@ static int ea_dealloc_indirect(struct gfs2_inode *ip)
> unsigned int x;
> int error;
>
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
>
> error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
> @@ -1439,6 +1447,10 @@ static int ea_dealloc_block(struct gfs2_inode *ip)
> struct gfs2_holder gh;
> int error;
>
> + error = gfs2_rindex_update(sdp);
> + if (error)
> + return error;
> +
> rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
> if (!rgd) {
> gfs2_consist_inode(ip);
>


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