[PATCH] ufs: missed brelse and wrong baseblk
This patch fixes two bugs, which introduced by previous patches: 1) Missed "brelse" 2) Sometimes "baseblk" may be wrongly calculated, if i_size is equal to zero, which lead infinite cycle in "mpage_writepages". Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -269,20 +269,17 @@ out:
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* We can come here from ufs_writepage or ufs_prepare_write,
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* locked_page is argument of these functions, so we already lock it.
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*/
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static void ufs_change_blocknr(struct inode *inode, unsigned int count,
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unsigned int oldb, unsigned int newb,
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struct page *locked_page)
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static void ufs_change_blocknr(struct inode *inode, unsigned int baseblk,
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unsigned int count, unsigned int oldb,
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unsigned int newb, struct page *locked_page)
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{
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unsigned int blk_per_page = 1 << (PAGE_CACHE_SHIFT - inode->i_blkbits);
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sector_t baseblk;
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struct address_space *mapping = inode->i_mapping;
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pgoff_t index, cur_index = locked_page->index;
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unsigned int i, j;
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struct page *page;
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struct buffer_head *head, *bh;
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baseblk = ((i_size_read(inode) - 1) >> inode->i_blkbits) + 1 - count;
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UFSD("ENTER, ino %lu, count %u, oldb %u, newb %u\n",
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inode->i_ino, count, oldb, newb);
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@ -439,7 +436,8 @@ unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
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}
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result = ufs_alloc_fragments (inode, cgno, goal, request, err);
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if (result) {
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ufs_change_blocknr(inode, oldcount, tmp, result, locked_page);
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ufs_change_blocknr(inode, fragment - oldcount, oldcount, tmp,
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result, locked_page);
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*p = cpu_to_fs32(sb, result);
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*err = 0;
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@ -175,6 +175,7 @@ ufs_clear_frags(struct inode *inode, sector_t beg,
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for (++beg; beg < end; ++beg) {
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bh = sb_getblk(inode->i_sb, beg);
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ufs_clear_frag(inode, bh);
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brelse(bh);
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}
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return res;
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}
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