These changes are crafted based on the similar
conversion done to ext2 by Nick Piggin.
- Remove the deprecated ->truncate vector, call a new
exofs_setsize for on-disk size update.
- Call truncate_pagecache on the unused pages if
write_begin/end fails.
- Cleanup exofs_delete_inode that did stupid inode
writes and updates on an inode that will be
removed.
- And finally get rid of exofs_get_block. We never
had any blocks it was all for calling nobh_truncate_page.
nobh_truncate_page is not actually needed in exofs since
the last page is complete and gone, just like all the other
pages. There is no partial blocks in exofs.
[OK do I need a partial read here upto i_size ???]
I've tested with this patch, and there are no apparent
failures, so far.
CC: Nick Piggin <npiggin@xxxxxxx>
CC: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/exofs/exofs.h | 1 -
fs/exofs/file.c | 1 -
fs/exofs/inode.c | 112 ++++++++++++++++++++++++++---------------------------
3 files changed, 55 insertions(+), 59 deletions(-)
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 22721b2..0706ce9 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -256,7 +256,6 @@ static inline int exofs_oi_read(struct exofs_i_info *oi,
}
/* inode.c */
-void exofs_truncate(struct inode *inode);
int exofs_setattr(struct dentry *, struct iattr *);
int exofs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index fef6899..f9bfe2b 100644
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -86,6 +86,5 @@ const struct file_operations exofs_file_operations = {
};
const struct inode_operations exofs_file_inode_operations = {
- .truncate = exofs_truncate,
.setattr = exofs_setattr,
};
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 4bb6ef8..8e101ed 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -710,7 +710,7 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
fsdata);
if (ret) {
EXOFS_DBGMSG("simple_write_begin faild\n");
- return ret;
+ goto out;
}
page = *pagep;
@@ -725,7 +725,14 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
EXOFS_DBGMSG("__readpage_filler faild\n");
}
}
+out:
+ if (unlikely(ret)) {
+ struct inode *inode = mapping->host;
+ loff_t to = pos + len;
+ if (to > inode->i_size)
+ truncate_pagecache(inode, to, inode->i_size);
+ }
return ret;
}
@@ -750,6 +757,10 @@ static int exofs_write_end(struct file *file, struct address_space *mapping,
int ret;
ret = simple_write_end(file, mapping,pos, len, copied, page, fsdata);
+ if (unlikely(ret && pos + len > inode->i_size))
+ truncate_pagecache(inode, pos + len, inode->i_size);
+
+ /* TODO: once simple_write_end marks inode dirty remove */
if (i_size != inode->i_size)
mark_inode_dirty(inode);
return ret;
@@ -808,35 +819,18 @@ static inline int exofs_inode_is_fast_symlink(struct inode *inode)
return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0);
}
-/*
- * get_block_t - Fill in a buffer_head
- * An OSD takes care of block allocation so we just fake an allocation by
- * putting in the inode's sector_t in the buffer_head.
- * TODO: What about the case of create==0 and @iblock does not exist in the
- * object?
- */
-static int exofs_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- map_bh(bh_result, inode->i_sb, iblock);
- return 0;
-}
-
const struct osd_attr g_attr_logical_length = ATTR_DEF(
OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8);
-static int _do_truncate(struct inode *inode)
+static int _do_truncate(struct inode *inode, loff_t newsize)
{
struct exofs_i_info *oi = exofs_i(inode);
- loff_t isize = i_size_read(inode);
int ret;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- nobh_truncate_page(inode->i_mapping, isize, exofs_get_block);
-
- ret = exofs_oi_truncate(oi, (u64)isize);
- EXOFS_DBGMSG("(0x%lx) size=0x%llx\n", inode->i_ino, isize);
+ ret = exofs_oi_truncate(oi, (u64)newsize);
+ EXOFS_DBGMSG("(0x%lx) size=0x%llx\n", inode->i_ino, newsize);
return ret;
}
@@ -844,35 +838,28 @@ static int _do_truncate(struct inode *inode)
* Truncate a file to the specified size - all we have to do is set the size
* attribute. We make sure the object exists first.
*/
-void exofs_truncate(struct inode *inode)
+static int exofs_setsize(struct inode *inode, loff_t newsize)
{
- struct exofs_i_info *oi = exofs_i(inode);
- int ret;
+ loff_t oldsize;
+ int error;
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
- || S_ISLNK(inode->i_mode)))
- return;
+ error = inode_newsize_ok(inode, newsize);
+ if (error)
+ return error;
+
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return -EINVAL;
if (exofs_inode_is_fast_symlink(inode))
- return;
+ return -EINVAL;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return;
-
- /* if we are about to truncate an object, and it hasn't been
- * created yet, wait
- */
- if (unlikely(wait_obj_created(oi)))
- goto fail;
+ return -EPERM;
- ret = _do_truncate(inode);
- if (ret)
- goto fail;
+ oldsize = inode->i_size;
+ i_size_write(inode, newsize);
+ truncate_pagecache(inode, oldsize, newsize);
-out:
- mark_inode_dirty(inode);
- return;
-fail:
- make_bad_inode(inode);
- goto out;
+ return _do_truncate(inode, newsize);
}
/*
@@ -883,11 +870,25 @@ int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
struct inode *inode = dentry->d_inode;
int error;
+ /* if we are about to modify an object, and it hasn't been
+ * created yet, wait
+ */
+ error = wait_obj_created(exofs_i(inode));
+ if (unlikely(error))
+ return error;
+
error = inode_change_ok(inode, iattr);
if (error)
return error;
- error = inode_setattr(inode, iattr);
+ if (iattr->ia_valid & ATTR_SIZE) {
+ error = exofs_setsize(inode, iattr->ia_size);
+ if (error)
+ return error;
+ }
+ generic_setattr(inode, iattr);
+ mark_inode_dirty(inode);
+
return error;
}
@@ -1335,28 +1336,25 @@ void exofs_delete_inode(struct inode *inode)
truncate_inode_pages(&inode->i_data, 0);
+ /* TODO: should do better here */
if (is_bad_inode(inode))
goto no_delete;
- mark_inode_dirty(inode);
- exofs_update_inode(inode, inode_needs_sync(inode));
-
inode->i_size = 0;
- if (inode->i_blocks)
- exofs_truncate(inode);
-
clear_inode(inode);
- ret = exofs_get_io_state(&sbi->layout, &ios);
- if (unlikely(ret)) {
- EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__);
- return;
- }
-
/* if we are deleting an obj that hasn't been created yet, wait */
if (!obj_created(oi)) {
BUG_ON(!obj_2bcreated(oi));
wait_event(oi->i_wq, obj_created(oi));
+ /* ignore the error attempt a remove anyway */
+ }
+
+ /* Now Remove the OSD objects */
+ ret = exofs_get_io_state(&sbi->layout, &ios);
+ if (unlikely(ret)) {
+ EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__);
+ return;
}
ios->obj.id = exofs_oi_objno(oi);
--
1.6.6.1
--
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