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author | Theodore Ts'o <tytso@mit.edu> | 2016-11-13 22:02:26 -0500 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2016-11-13 22:02:26 -0500 |
commit | 2c98eb5ea249767bbc11cf4e70e91d5b0458ed13 (patch) | |
tree | de83b9e69d357898b2b737257b33dfc1ace75ba8 /fs/ext4/inode.c | |
parent | 6da22013bb7907b33c87968c25034b409a6161a2 (diff) | |
download | op-kernel-dev-2c98eb5ea249767bbc11cf4e70e91d5b0458ed13.zip op-kernel-dev-2c98eb5ea249767bbc11cf4e70e91d5b0458ed13.tar.gz |
ext4: allow ext4_truncate() to return an error
This allows us to properly propagate errors back up to
ext4_truncate()'s callers. This also means we no longer have to
silently ignore some errors (e.g., when trying to add the inode to the
orphan inode list).
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r-- | fs/ext4/inode.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 48fbdfc..5851530 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -261,8 +261,15 @@ void ext4_evict_inode(struct inode *inode) "couldn't mark inode dirty (err %d)", err); goto stop_handle; } - if (inode->i_blocks) - ext4_truncate(inode); + if (inode->i_blocks) { + err = ext4_truncate(inode); + if (err) { + ext4_error(inode->i_sb, + "couldn't truncate inode %lu (err %d)", + inode->i_ino, err); + goto stop_handle; + } + } /* * ext4_ext_truncate() doesn't reserve any slop when it @@ -4097,10 +4104,11 @@ int ext4_inode_attach_jinode(struct inode *inode) * that's fine - as long as they are linked from the inode, the post-crash * ext4_truncate() run will find them and release them. */ -void ext4_truncate(struct inode *inode) +int ext4_truncate(struct inode *inode) { struct ext4_inode_info *ei = EXT4_I(inode); unsigned int credits; + int err = 0; handle_t *handle; struct address_space *mapping = inode->i_mapping; @@ -4114,7 +4122,7 @@ void ext4_truncate(struct inode *inode) trace_ext4_truncate_enter(inode); if (!ext4_can_truncate(inode)) - return; + return 0; ext4_clear_inode_flag(inode, EXT4_INODE_EOFBLOCKS); @@ -4126,13 +4134,13 @@ void ext4_truncate(struct inode *inode) ext4_inline_data_truncate(inode, &has_inline); if (has_inline) - return; + return 0; } /* If we zero-out tail of the page, we have to create jinode for jbd2 */ if (inode->i_size & (inode->i_sb->s_blocksize - 1)) { if (ext4_inode_attach_jinode(inode) < 0) - return; + return 0; } if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) @@ -4141,10 +4149,8 @@ void ext4_truncate(struct inode *inode) credits = ext4_blocks_for_truncate(inode); handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits); - if (IS_ERR(handle)) { - ext4_std_error(inode->i_sb, PTR_ERR(handle)); - return; - } + if (IS_ERR(handle)) + return PTR_ERR(handle); if (inode->i_size & (inode->i_sb->s_blocksize - 1)) ext4_block_truncate_page(handle, mapping, inode->i_size); @@ -4158,7 +4164,8 @@ void ext4_truncate(struct inode *inode) * Implication: the file must always be in a sane, consistent * truncatable state while each transaction commits. */ - if (ext4_orphan_add(handle, inode)) + err = ext4_orphan_add(handle, inode); + if (err) goto out_stop; down_write(&EXT4_I(inode)->i_data_sem); @@ -4191,6 +4198,7 @@ out_stop: ext4_journal_stop(handle); trace_ext4_truncate_exit(inode); + return err; } /* @@ -5205,12 +5213,15 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) * in data=journal mode to make pages freeable. */ truncate_pagecache(inode, inode->i_size); - if (shrink) - ext4_truncate(inode); + if (shrink) { + rc = ext4_truncate(inode); + if (rc) + error = rc; + } up_write(&EXT4_I(inode)->i_mmap_sem); } - if (!rc) { + if (!error) { setattr_copy(inode, attr); mark_inode_dirty(inode); } @@ -5222,7 +5233,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) if (orphan && inode->i_nlink) ext4_orphan_del(NULL, inode); - if (!rc && (ia_valid & ATTR_MODE)) + if (!error && (ia_valid & ATTR_MODE)) rc = posix_acl_chmod(inode, inode->i_mode); err_out: |