Commit ba9d8cec authored by Vladimir Saveliev's avatar Vladimir Saveliev Committed by Linus Torvalds
Browse files

reiserfs: convert to new aops



Convert reiserfs to new aops
Signed-off-by: default avatarVladimir Saveliev <vs@namesys.com>
Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 797b4cff
......@@ -17,11 +17,12 @@
#include <linux/mpage.h>
#include <linux/writeback.h>
#include <linux/quotaops.h>
#include <linux/swap.h>
static int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
static int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to);
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to);
void reiserfs_delete_inode(struct inode *inode)
{
......@@ -2550,8 +2551,71 @@ static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
return reiserfs_write_full_page(page, wbc);
}
static int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to)
static int reiserfs_write_begin(struct file *file,
struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
struct inode *inode;
struct page *page;
pgoff_t index;
int ret;
int old_ref = 0;
index = pos >> PAGE_CACHE_SHIFT;
page = __grab_cache_page(mapping, index);
if (!page)
return -ENOMEM;
*pagep = page;
inode = mapping->host;
reiserfs_wait_on_write_block(inode->i_sb);
fix_tail_page_for_writing(page);
if (reiserfs_transaction_running(inode->i_sb)) {
struct reiserfs_transaction_handle *th;
th = (struct reiserfs_transaction_handle *)current->
journal_info;
BUG_ON(!th->t_refcount);
BUG_ON(!th->t_trans_id);
old_ref = th->t_refcount;
th->t_refcount++;
}
ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
reiserfs_get_block);
if (ret && reiserfs_transaction_running(inode->i_sb)) {
struct reiserfs_transaction_handle *th = current->journal_info;
/* this gets a little ugly. If reiserfs_get_block returned an
* error and left a transacstion running, we've got to close it,
* and we've got to free handle if it was a persistent transaction.
*
* But, if we had nested into an existing transaction, we need
* to just drop the ref count on the handle.
*
* If old_ref == 0, the transaction is from reiserfs_get_block,
* and it was a persistent trans. Otherwise, it was nested above.
*/
if (th->t_refcount > old_ref) {
if (old_ref)
th->t_refcount--;
else {
int err;
reiserfs_write_lock(inode->i_sb);
err = reiserfs_end_persistent_transaction(th);
reiserfs_write_unlock(inode->i_sb);
if (err)
ret = err;
}
}
}
if (ret) {
unlock_page(page);
page_cache_release(page);
}
return ret;
}
int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to)
{
struct inode *inode = page->mapping->host;
int ret;
......@@ -2604,8 +2668,100 @@ static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block)
return generic_block_bmap(as, block, reiserfs_bmap);
}
static int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to)
static int reiserfs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
struct inode *inode = page->mapping->host;
int ret = 0;
int update_sd = 0;
struct reiserfs_transaction_handle *th;
unsigned start;
reiserfs_wait_on_write_block(inode->i_sb);
if (reiserfs_transaction_running(inode->i_sb))
th = current->journal_info;
else
th = NULL;
start = pos & (PAGE_CACHE_SIZE - 1);
if (unlikely(copied < len)) {
if (!PageUptodate(page))
copied = 0;
page_zero_new_buffers(page, start + copied, start + len);
}
flush_dcache_page(page);
reiserfs_commit_page(inode, page, start, start + copied);
/* generic_commit_write does this for us, but does not update the
** transaction tracking stuff when the size changes. So, we have
** to do the i_size updates here.
*/
pos += copied;
if (pos > inode->i_size) {
struct reiserfs_transaction_handle myth;
reiserfs_write_lock(inode->i_sb);
/* If the file have grown beyond the border where it
can have a tail, unmark it as needing a tail
packing */
if ((have_large_tails(inode->i_sb)
&& inode->i_size > i_block_size(inode) * 4)
|| (have_small_tails(inode->i_sb)
&& inode->i_size > i_block_size(inode)))
REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
ret = journal_begin(&myth, inode->i_sb, 1);
if (ret) {
reiserfs_write_unlock(inode->i_sb);
goto journal_error;
}
reiserfs_update_inode_transaction(inode);
inode->i_size = pos;
/*
* this will just nest into our transaction. It's important
* to use mark_inode_dirty so the inode gets pushed around on the
* dirty lists, and so that O_SYNC works as expected
*/
mark_inode_dirty(inode);
reiserfs_update_sd(&myth, inode);
update_sd = 1;
ret = journal_end(&myth, inode->i_sb, 1);
reiserfs_write_unlock(inode->i_sb);
if (ret)
goto journal_error;
}
if (th) {
reiserfs_write_lock(inode->i_sb);
if (!update_sd)
mark_inode_dirty(inode);
ret = reiserfs_end_persistent_transaction(th);
reiserfs_write_unlock(inode->i_sb);
if (ret)
goto out;
}
out:
unlock_page(page);
page_cache_release(page);
return ret == 0 ? copied : ret;
journal_error:
if (th) {
reiserfs_write_lock(inode->i_sb);
if (!update_sd)
reiserfs_update_sd(th, inode);
ret = reiserfs_end_persistent_transaction(th);
reiserfs_write_unlock(inode->i_sb);
}
goto out;
}
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to)
{
struct inode *inode = page->mapping->host;
loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + to;
......@@ -2999,8 +3155,8 @@ const struct address_space_operations reiserfs_address_space_operations = {
.releasepage = reiserfs_releasepage,
.invalidatepage = reiserfs_invalidatepage,
.sync_page = block_sync_page,
.prepare_write = reiserfs_prepare_write,
.commit_write = reiserfs_commit_write,
.write_begin = reiserfs_write_begin,
.write_end = reiserfs_write_end,
.bmap = reiserfs_aop_bmap,
.direct_IO = reiserfs_direct_IO,
.set_page_dirty = reiserfs_set_page_dirty,
......
......@@ -128,6 +128,10 @@ long reiserfs_compat_ioctl(struct file *file, unsigned int cmd,
}
#endif
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to);
/*
** reiserfs_unpack
** Function try to convert tail from direct item into indirect.
......@@ -175,15 +179,13 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
if (!page) {
goto out;
}
retval =
mapping->a_ops->prepare_write(NULL, page, write_from, write_from);
retval = reiserfs_prepare_write(NULL, page, write_from, write_from);
if (retval)
goto out_unlock;
/* conversion can change page contents, must flush */
flush_dcache_page(page);
retval =
mapping->a_ops->commit_write(NULL, page, write_from, write_from);
retval = reiserfs_commit_write(NULL, page, write_from, write_from);
REISERFS_I(inode)->i_flags |= i_nopack_mask;
out_unlock:
......
......@@ -426,6 +426,12 @@ static inline __u32 xattr_hash(const char *msg, int len)
return csum_partial(msg, len, 0);
}
int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to);
int reiserfs_prepare_write(struct file *f, struct page *page,
unsigned from, unsigned to);
/* Generic extended attribute operations that can be used by xa plugins */
/*
......@@ -512,15 +518,15 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
rxh->h_hash = cpu_to_le32(xahash);
}
err = mapping->a_ops->prepare_write(fp, page, page_offset,
page_offset + chunk + skip);
err = reiserfs_prepare_write(fp, page, page_offset,
page_offset + chunk + skip);
if (!err) {
if (buffer)
memcpy(data + skip, buffer + buffer_pos, chunk);
err =
mapping->a_ops->commit_write(fp, page, page_offset,
page_offset + chunk +
skip);
reiserfs_commit_write(fp, page, page_offset,
page_offset + chunk +
skip);
}
unlock_page(page);
reiserfs_put_page(page);
......
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