From 0f70b40613ee14b0cadafeb461034cff81b4419a Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Fri, 15 Feb 2013 03:35:57 -0500 Subject: [PATCH] ext4: use ERR_PTR() abstraction for ext4_append() Use ERR_PTR()/IS_ERR() abstraction instead of passing in a separate pointer to an integer for the error code, as a code cleanup. Signed-off-by: "Theodore Ts'o" --- fs/ext4/inode.c | 2 ++ fs/ext4/namei.c | 65 +++++++++++++++++++++++-------------------------- 2 files changed, 33 insertions(+), 34 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c4e9177f60c..f4466c3650d 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -707,6 +707,8 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, /* ensure we send some value back into *errp */ *errp = 0; + if (create && err == 0) + err = -ENOSPC; /* should never happen */ if (err < 0) *errp = err; if (err <= 0) diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 0e28c749e27..f58c053d13e 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -51,34 +51,28 @@ static struct buffer_head *ext4_append(handle_t *handle, struct inode *inode, - ext4_lblk_t *block, int *err) + ext4_lblk_t *block) { struct buffer_head *bh; + int err = 0; if (unlikely(EXT4_SB(inode->i_sb)->s_max_dir_size_kb && ((inode->i_size >> 10) >= - EXT4_SB(inode->i_sb)->s_max_dir_size_kb))) { - *err = -ENOSPC; - return NULL; - } + EXT4_SB(inode->i_sb)->s_max_dir_size_kb))) + return ERR_PTR(-ENOSPC); *block = inode->i_size >> inode->i_sb->s_blocksize_bits; - bh = ext4_bread(handle, inode, *block, 1, err); - if (bh) { - inode->i_size += inode->i_sb->s_blocksize; - EXT4_I(inode)->i_disksize = inode->i_size; - *err = ext4_journal_get_write_access(handle, bh); - if (*err) { - brelse(bh); - bh = NULL; - } - } - if (!bh && !(*err)) { - *err = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); + bh = ext4_bread(handle, inode, *block, 1, &err); + if (!bh) + return ERR_PTR(err); + inode->i_size += inode->i_sb->s_blocksize; + EXT4_I(inode)->i_disksize = inode->i_size; + err = ext4_journal_get_write_access(handle, bh); + if (err) { + brelse(bh); + ext4_std_error(inode->i_sb, err); + return ERR_PTR(err); } return bh; } @@ -1555,11 +1549,12 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) csum_size = sizeof(struct ext4_dir_entry_tail); - bh2 = ext4_append (handle, dir, &newblock, &err); - if (!(bh2)) { + bh2 = ext4_append(handle, dir, &newblock); + if (IS_ERR(bh2)) { brelse(*bh); *bh = NULL; - goto errout; + *error = PTR_ERR(bh2); + return NULL; } BUFFER_TRACE(*bh, "get_write_access"); @@ -1640,7 +1635,6 @@ journal_error: brelse(bh2); *bh = NULL; ext4_std_error(dir->i_sb, err); -errout: *error = err; return NULL; } @@ -1815,10 +1809,10 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry, len = ((char *) root) + (blocksize - csum_size) - (char *) de; /* Allocate new block for the 0th block's dirents */ - bh2 = ext4_append(handle, dir, &block, &retval); - if (!(bh2)) { + bh2 = ext4_append(handle, dir, &block); + if (IS_ERR(bh2)) { brelse(bh); - return retval; + return PTR_ERR(bh2); } ext4_set_inode_flag(dir, EXT4_INODE_INDEX); data1 = bh2->b_data; @@ -1950,9 +1944,9 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, return make_indexed_dir(handle, dentry, inode, bh); brelse(bh); } - bh = ext4_append(handle, dir, &block, &retval); - if (!bh) - return retval; + bh = ext4_append(handle, dir, &block); + if (IS_ERR(bh)) + return PTR_ERR(bh); de = (struct ext4_dir_entry_2 *) bh->b_data; de->inode = 0; de->rec_len = ext4_rec_len_to_disk(blocksize - csum_size, blocksize); @@ -2023,9 +2017,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, err = -ENOSPC; goto cleanup; } - bh2 = ext4_append (handle, dir, &newblock, &err); - if (!(bh2)) + bh2 = ext4_append(handle, dir, &newblock); + if (IS_ERR(bh2)) { + err = PTR_ERR(bh2); goto cleanup; + } node2 = (struct dx_node *)(bh2->b_data); entries2 = node2->entries; memset(&node2->fake, 0, sizeof(struct fake_dirent)); @@ -2364,8 +2360,9 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir, } inode->i_size = 0; - if (!(dir_block = ext4_append(handle, inode, &block, &err))) - goto out; + dir_block = ext4_append(handle, inode, &block); + if (IS_ERR(dir_block)) + return PTR_ERR(dir_block); BUFFER_TRACE(dir_block, "get_write_access"); err = ext4_journal_get_write_access(handle, dir_block); if (err) -- 2.20.1