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Date: Wed, 25 May 2011 10:44:09 +0200
From: Jan Kara <jack@...e.cz>
To: linux-ext4@...r.kernel.org
Cc: Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>
Subject: [PATCH] ext3: Convert ext3 to new truncate calling convention
Mostly trivial conversion. We fix a bug that IS_IMMUTABLE and IS_APPEND
files could not be truncated during failed writes as we change the code.
Signed-off-by: Jan Kara <jack@...e.cz>
---
fs/ext3/file.c | 1 -
fs/ext3/inode.c | 40 +++++++++++++++++++++++++++-------------
include/linux/ext3_fs.h | 2 +-
3 files changed, 28 insertions(+), 15 deletions(-)
I've added this patch to my tree.
diff --git a/fs/ext3/file.c b/fs/ext3/file.c
index f55df0e..86c8ab3 100644
--- a/fs/ext3/file.c
+++ b/fs/ext3/file.c
@@ -71,7 +71,6 @@ const struct file_operations ext3_file_operations = {
};
const struct inode_operations ext3_file_inode_operations = {
- .truncate = ext3_truncate,
.setattr = ext3_setattr,
#ifdef CONFIG_EXT3_FS_XATTR
.setxattr = generic_setxattr,
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 4d327a5..abb33cd 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -234,12 +234,10 @@ void ext3_evict_inode (struct inode *inode)
if (inode->i_blocks)
ext3_truncate(inode);
/*
- * Kill off the orphan record which ext3_truncate created.
- * AKPM: I think this can be inside the above `if'.
- * Note that ext3_orphan_del() has to be able to cope with the
- * deletion of a non-existent orphan - this is because we don't
- * know if ext3_truncate() actually created an orphan record.
- * (Well, we could do this if we need to, but heck - it works)
+ * Kill off the orphan record created when the inode lost the last
+ * link. Note that ext3_orphan_del() has to be able to cope with the
+ * deletion of a non-existent orphan - ext3_truncate() could
+ * have removed the record.
*/
ext3_orphan_del(handle, inode);
EXT3_I(inode)->i_dtime = get_seconds();
@@ -890,6 +888,9 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
if (!create || err == -EIO)
goto cleanup;
+ /*
+ * Block out ext3_truncate while we alter the tree
+ */
mutex_lock(&ei->truncate_mutex);
/*
@@ -938,9 +939,6 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
*/
count = ext3_blks_to_allocate(partial, indirect_blks,
maxblocks, blocks_to_boundary);
- /*
- * Block out ext3_truncate while we alter the tree
- */
err = ext3_alloc_branch(handle, inode, indirect_blks, &count, goal,
offsets + (partial - chain), partial);
@@ -1863,7 +1861,7 @@ retry:
/* This is really bad luck. We've written the data
* but cannot extend i_size. Truncate allocated blocks
* and pretend the write failed... */
- ext3_truncate(inode);
+ ext3_truncate_failed_write(inode);
ret = PTR_ERR(handle);
goto out;
}
@@ -2414,8 +2412,6 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
int ext3_can_truncate(struct inode *inode)
{
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return 0;
if (S_ISREG(inode->i_mode))
return 1;
if (S_ISDIR(inode->i_mode))
@@ -3188,6 +3184,24 @@ int ext3_write_inode(struct inode *inode, struct writeback_control *wbc)
return ext3_force_commit(inode->i_sb);
}
+static int ext3_setsize(struct inode *inode, loff_t newsize)
+{
+ loff_t oldsize;
+ int rc;
+
+ rc = inode_newsize_ok(inode, newsize);
+ if (rc)
+ return rc;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ return -EPERM;
+ oldsize = inode->i_size;
+ i_size_write(inode, newsize);
+ truncate_pagecache(inode, oldsize, newsize);
+ ext3_truncate(inode);
+
+ return 0;
+}
+
/*
* ext3_setattr()
*
@@ -3264,7 +3278,7 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- rc = vmtruncate(inode, attr->ia_size);
+ rc = ext3_setsize(inode, attr->ia_size);
if (rc)
goto err_out;
}
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 85c1d30..d7511b4 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -913,7 +913,7 @@ extern void ext3_dirty_inode(struct inode *);
extern int ext3_change_inode_journal_flag(struct inode *, int);
extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *);
extern int ext3_can_truncate(struct inode *inode);
-extern void ext3_truncate (struct inode *);
+extern void ext3_truncate(struct inode *inode);
extern void ext3_set_inode_flags(struct inode *);
extern void ext3_get_inode_flags(struct ext3_inode_info *);
extern void ext3_set_aops(struct inode *inode);
--
1.7.1
--
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