Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes

[pandora-kernel.git] / fs / gfs2 / bmap.c

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index c1ee635..bec76b1 100644 (file)
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -246,15 +246,11 @@ static void find_metapath(const struct gfs2_sbd *sdp, u64 block,
 
 }
 
-static inline unsigned int zero_metapath_length(const struct metapath *mp,
-                                               unsigned height)
+static inline unsigned int metapath_branch_start(const struct metapath *mp)
 {
-       unsigned int i;
-       for (i = 0; i < height - 1; i++) {
-               if (mp->mp_list[i] != 0)
-                       return i;
-       }
-       return height;
+       if (mp->mp_list[0] == 0)
+               return 2;
+       return 1;
 }
 
 /**
@@ -436,7 +432,7 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
        struct gfs2_sbd *sdp = GFS2_SB(inode);
        struct buffer_head *dibh = mp->mp_bh[0];
        u64 bn, dblock = 0;
-       unsigned n, i, blks, alloced = 0, iblks = 0, zmpl = 0;
+       unsigned n, i, blks, alloced = 0, iblks = 0, branch_start = 0;
        unsigned dblks = 0;
        unsigned ptrs_per_blk;
        const unsigned end_of_metadata = height - 1;
@@ -471,9 +467,8 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
                        /* Building up tree height */
                        state = ALLOC_GROW_HEIGHT;
                        iblks = height - ip->i_height;
-                       zmpl = zero_metapath_length(mp, height);
-                       iblks -= zmpl;
-                       iblks += height;
+                       branch_start = metapath_branch_start(mp);
+                       iblks += (height - branch_start);
                }
        }
 
@@ -509,13 +504,13 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
                                        sizeof(struct gfs2_meta_header));
                                *ptr = zero_bn;
                                state = ALLOC_GROW_DEPTH;
-                               for(i = zmpl; i < height; i++) {
+                               for(i = branch_start; i < height; i++) {
                                        if (mp->mp_bh[i] == NULL)
                                                break;
                                        brelse(mp->mp_bh[i]);
                                        mp->mp_bh[i] = NULL;
                                }
-                               i = zmpl;
+                               i = branch_start;
                        }
                        if (n == 0)
                                break;
@@ -900,15 +895,13 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
        int error;
 
        al = gfs2_alloc_get(ip);
+       if (!al)
+               return -ENOMEM;
 
-       error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+       error = gfs2_quota_lock_check(ip);
        if (error)
                goto out;
 
-       error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
-       if (error)
-               goto out_gunlock_q;
-
        al->al_requested = sdp->sd_max_height + RES_DATA;
 
        error = gfs2_inplace_reserve(ip);
@@ -1081,7 +1074,8 @@ static int trunc_dealloc(struct gfs2_inode *ip, u64 size)
                lblock = (size - 1) >> sdp->sd_sb.sb_bsize_shift;
 
        find_metapath(sdp, lblock, &mp, ip->i_height);
-       gfs2_alloc_get(ip);
+       if (!gfs2_alloc_get(ip))
+               return -ENOMEM;
 
        error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
        if (error)