From d432c80e68e3c283fc9a85021f5b65e0aabf254e Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Thu, 28 Sep 2006 11:03:44 +1000 Subject: [PATCH] [XFS] Minor code rearranging and cleanup to prevent some coverity false positives. SGI-PV: 955502 SGI-Modid: xfs-linux-melb:xfs-kern:26805a Signed-off-by: Nathan Scott Signed-off-by: Tim Shimmin --- fs/xfs/xfs_alloc.c | 4 +++- fs/xfs/xfs_da_btree.c | 33 ++++++++++++++++++--------------- fs/xfs/xfs_rtalloc.c | 36 +++++++++++++++--------------------- 3 files changed, 36 insertions(+), 37 deletions(-) diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 879aa38ddd2a..e80dda3437d1 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -1477,8 +1477,10 @@ xfs_alloc_ag_vextent_small( /* * Can't allocate from the freelist for some reason. */ - else + else { + fbno = NULLAGBLOCK; flen = 0; + } /* * Can't do the allocation, give up. */ diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c index 32ab61d17ace..a68bc1f1a313 100644 --- a/fs/xfs/xfs_da_btree.c +++ b/fs/xfs/xfs_da_btree.c @@ -1054,7 +1054,7 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) xfs_da_node_entry_t *btree; xfs_dablk_t blkno; int probe, span, max, error, retval; - xfs_dahash_t hashval; + xfs_dahash_t hashval, btreehashval; xfs_da_args_t *args; args = state->args; @@ -1079,30 +1079,32 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) return(error); } curr = blk->bp->data; - ASSERT(be16_to_cpu(curr->magic) == XFS_DA_NODE_MAGIC || - be16_to_cpu(curr->magic) == XFS_DIR2_LEAFN_MAGIC || - be16_to_cpu(curr->magic) == XFS_ATTR_LEAF_MAGIC); + blk->magic = be16_to_cpu(curr->magic); + ASSERT(blk->magic == XFS_DA_NODE_MAGIC || + blk->magic == XFS_DIR2_LEAFN_MAGIC || + blk->magic == XFS_ATTR_LEAF_MAGIC); /* * Search an intermediate node for a match. */ - blk->magic = be16_to_cpu(curr->magic); if (blk->magic == XFS_DA_NODE_MAGIC) { node = blk->bp->data; - blk->hashval = be32_to_cpu(node->btree[be16_to_cpu(node->hdr.count)-1].hashval); + max = be16_to_cpu(node->hdr.count); + btreehashval = node->btree[max-1].hashval; + blk->hashval = be32_to_cpu(btreehashval); /* * Binary search. (note: small blocks will skip loop) */ - max = be16_to_cpu(node->hdr.count); probe = span = max / 2; hashval = args->hashval; for (btree = &node->btree[probe]; span > 4; btree = &node->btree[probe]) { span /= 2; - if (be32_to_cpu(btree->hashval) < hashval) + btreehashval = be32_to_cpu(btree->hashval); + if (btreehashval < hashval) probe += span; - else if (be32_to_cpu(btree->hashval) > hashval) + else if (btreehashval > hashval) probe -= span; else break; @@ -1133,10 +1135,10 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) blk->index = probe; blkno = be32_to_cpu(btree->before); } - } else if (be16_to_cpu(curr->magic) == XFS_ATTR_LEAF_MAGIC) { + } else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { blk->hashval = xfs_attr_leaf_lasthash(blk->bp, NULL); break; - } else if (be16_to_cpu(curr->magic) == XFS_DIR2_LEAFN_MAGIC) { + } else if (blk->magic == XFS_DIR2_LEAFN_MAGIC) { blk->hashval = xfs_dir2_leafn_lasthash(blk->bp, NULL); break; } @@ -1152,11 +1154,13 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) if (blk->magic == XFS_DIR2_LEAFN_MAGIC) { retval = xfs_dir2_leafn_lookup_int(blk->bp, args, &blk->index, state); - } - else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { + } else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { retval = xfs_attr_leaf_lookup_int(blk->bp, args); blk->index = args->index; args->blkno = blk->blkno; + } else { + ASSERT(0); + return XFS_ERROR(EFSCORRUPTED); } if (((retval == ENOENT) || (retval == ENOATTR)) && (blk->hashval == args->hashval)) { @@ -1166,8 +1170,7 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) return(error); if (retval == 0) { continue; - } - else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { + } else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { /* path_shift() gives ENOENT */ retval = XFS_ERROR(ENOATTR); } diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index 5a0b678956e0..e050987afe18 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -1976,7 +1976,10 @@ xfs_growfs_rt( if ((error = xfs_growfs_rt_alloc(mp, rsumblocks, nrsumblocks, mp->m_sb.sb_rsumino))) return error; - nmp = NULL; + /* + * Allocate a new (fake) mount/sb. + */ + nmp = kmem_alloc(sizeof(*nmp), KM_SLEEP); /* * Loop over the bitmap blocks. * We will do everything one bitmap block at a time. @@ -1987,10 +1990,6 @@ xfs_growfs_rt( ((sbp->sb_rextents & ((1 << mp->m_blkbit_log) - 1)) != 0); bmbno < nrbmblocks; bmbno++) { - /* - * Allocate a new (fake) mount/sb. - */ - nmp = kmem_alloc(sizeof(*nmp), KM_SLEEP); *nmp = *mp; nsbp = &nmp->m_sb; /* @@ -2018,13 +2017,13 @@ xfs_growfs_rt( cancelflags = 0; if ((error = xfs_trans_reserve(tp, 0, XFS_GROWRTFREE_LOG_RES(nmp), 0, 0, 0))) - goto error_exit; + break; /* * Lock out other callers by grabbing the bitmap inode lock. */ if ((error = xfs_trans_iget(mp, tp, mp->m_sb.sb_rbmino, 0, XFS_ILOCK_EXCL, &ip))) - goto error_exit; + break; ASSERT(ip == mp->m_rbmip); /* * Update the bitmap inode's size. @@ -2038,7 +2037,7 @@ xfs_growfs_rt( */ if ((error = xfs_trans_iget(mp, tp, mp->m_sb.sb_rsumino, 0, XFS_ILOCK_EXCL, &ip))) - goto error_exit; + break; ASSERT(ip == mp->m_rsumip); /* * Update the summary inode's size. @@ -2053,7 +2052,7 @@ xfs_growfs_rt( mp->m_rsumlevels != nmp->m_rsumlevels) { error = xfs_rtcopy_summary(mp, nmp, tp); if (error) - goto error_exit; + break; } /* * Update superblock fields. @@ -2080,17 +2079,12 @@ xfs_growfs_rt( error = xfs_rtfree_range(nmp, tp, sbp->sb_rextents, nsbp->sb_rextents - sbp->sb_rextents, &bp, &sumbno); if (error) - goto error_exit; + break; /* * Mark more blocks free in the superblock. */ xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, nsbp->sb_rextents - sbp->sb_rextents); - /* - * Free the fake mp structure. - */ - kmem_free(nmp, sizeof(*nmp)); - nmp = NULL; /* * Update mp values into the real mp structure. */ @@ -2101,15 +2095,15 @@ xfs_growfs_rt( */ xfs_trans_commit(tp, 0, NULL); } - return 0; + + if (error) + xfs_trans_cancel(tp, cancelflags); /* - * Error paths come here. + * Free the fake mp structure. */ -error_exit: - if (nmp) - kmem_free(nmp, sizeof(*nmp)); - xfs_trans_cancel(tp, cancelflags); + kmem_free(nmp, sizeof(*nmp)); + return error; } -- GitLab