[GFS2] Drop log lock on I/O error & tidy up

This patch drops the log spinlock when an I/O error occurs
to avoid any possible problems in case of blocking or
recursion in the I/O error routine. It also has a few
cosmetic changes to tidy up various other files.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index da49973..fe46d56 100644 (file)
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -226,8 +226,11 @@ void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
                        gfs2_assert(sdp, bd->bd_ail == ai);
 
                        if (!buffer_busy(bh)) {
-                               if (!buffer_uptodate(bh))
+                               if (!buffer_uptodate(bh)) {
+                                       gfs2_log_unlock(sdp);
                                        gfs2_io_error_bh(sdp, bh);
+                                       gfs2_log_lock(sdp);
+                               }
                                list_move(&bd->bd_ail_st_list,
                                          &ai->ai_ail2_list);
                                continue;

diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 62a12a5..b25ec4c 100644 (file)
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -213,8 +213,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
                if (error)
                        goto out_gunlock_q;
 
-               error = gfs2_trans_begin(sdp,
-                                        sdp->sd_max_dirres +
+               error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
                                         al->al_rgd->rd_ri.ri_length +
                                         2 * RES_DINODE + RES_STATFS +
                                         RES_QUOTA, 0);
@@ -303,7 +302,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
        if (error)
                goto out_gunlock;
 
-       error = gfs2_unlinki(dip, &dentry->d_name, ip,ul);
+       error = gfs2_unlinki(dip, &dentry->d_name, ip, ul);
 
        gfs2_trans_end(sdp);
 

diff --git a/fs/gfs2/page.c b/fs/gfs2/page.c
index a2c9e93..495db55 100644 (file)
--- a/fs/gfs2/page.c
+++ b/fs/gfs2/page.c
@@ -155,11 +155,9 @@ int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
        if (!PageUptodate(page)) {
                void *kaddr = kmap(page);
 
-               memcpy(kaddr,
-                      dibh->b_data + sizeof(struct gfs2_dinode),
+               memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode),
                       ip->i_di.di_size);
-               memset(kaddr + ip->i_di.di_size,
-                      0,
+               memset(kaddr + ip->i_di.di_size, 0,
                       PAGE_CACHE_SIZE - ip->i_di.di_size);
                kunmap(page);
 

diff --git a/fs/gfs2/unlinked.c b/fs/gfs2/unlinked.c
index 0d2314a..2824b16 100644 (file)
--- a/fs/gfs2/unlinked.c
+++ b/fs/gfs2/unlinked.c
@@ -130,11 +130,12 @@ static void enforce_limit(struct gfs2_sbd *sdp)
        unsigned int tries = 0, min = 0;
        int error;
 
-       if (atomic_read(&sdp->sd_unlinked_count) >=
-           gfs2_tune_get(sdp, gt_ilimit)) {
-               tries = gfs2_tune_get(sdp, gt_ilimit_tries);
-               min = gfs2_tune_get(sdp, gt_ilimit_min);
-       }
+       if (atomic_read(&sdp->sd_unlinked_count) <
+           gfs2_tune_get(sdp, gt_ilimit))
+               return;
+
+       tries = gfs2_tune_get(sdp, gt_ilimit_tries);
+       min = gfs2_tune_get(sdp, gt_ilimit_min);
 
        while (tries--) {
                struct gfs2_unlinked *ul = ul_fish(sdp);
@@ -187,7 +188,7 @@ int gfs2_unlinked_get(struct gfs2_sbd *sdp, struct gfs2_unlinked **ul)
 
        goto fail;
 
- found:
+found:
        for (b = 0; b < 8; b++)
                if (!(byte & (1 << b)))
                        break;
@@ -202,7 +203,7 @@ int gfs2_unlinked_get(struct gfs2_sbd *sdp, struct gfs2_unlinked **ul)
 
        return 0;
 
- fail:
+fail:
        spin_unlock(&sdp->sd_unlinked_spin);
        kfree(*ul);
        return -ENOSPC;
@@ -410,7 +411,7 @@ int gfs2_unlinked_init(struct gfs2_sbd *sdp)
 
        return 0;
 
- fail:
+fail:
        gfs2_unlinked_cleanup(sdp);
        return error;
 }