From f40661be038ce6ed9ef6a8b80307a9153bd95769 Mon Sep 17 00:00:00 2001
From: Anton Altaparmakov <aia21@cantab.net>
Date: Thu, 13 Jan 2005 16:03:38 +0000
Subject: [PATCH] NTFS: Optimise/reorganise some error handling code in
fs/ntfs/aops.c.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
---
fs/ntfs/aops.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index 92215228eeab..812d53e93354 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1392,14 +1392,11 @@ static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
attr_len = le32_to_cpu(ctx->attr->data.resident.value_length);
i_size = i_size_read(vi);
- kaddr = kmap_atomic(page, KM_USER0);
if (unlikely(attr_len > i_size)) {
- /* Zero out of bounds area in the mft record. */
- memset((u8*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset) +
- i_size, 0, attr_len - i_size);
attr_len = i_size;
+ ctx->attr->data.resident.value_length = cpu_to_le32(attr_len);
}
+ kaddr = kmap_atomic(page, KM_USER0);
/* Copy the data from the page to the mft record. */
memcpy((u8*)ctx->attr +
le16_to_cpu(ctx->attr->data.resident.value_offset),
@@ -1831,7 +1828,7 @@ static int ntfs_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
s64 new_size;
- unsigned long flags;
+ loff_t i_size;
struct inode *vi = page->mapping->host;
ntfs_inode *base_ni = NULL, *ni = NTFS_I(vi);
ntfs_volume *vol = ni->vol;
@@ -1934,13 +1931,11 @@ static int ntfs_prepare_write(struct file *file, struct page *page,
/* The total length of the attribute value. */
attr_len = le32_to_cpu(a->data.resident.value_length);
/* Fix an eventual previous failure of ntfs_commit_write(). */
- read_lock_irqsave(&ni->size_lock, flags);
- if (unlikely(ni->initialized_size < attr_len)) {
- attr_len = ni->initialized_size;
+ i_size = i_size_read(vi);
+ if (unlikely(attr_len > i_size)) {
+ attr_len = i_size;
a->data.resident.value_length = cpu_to_le32(attr_len);
- BUG_ON(attr_len < i_size_read(vi));
}
- read_unlock_irqrestore(&ni->size_lock, flags);
/* If we do not need to resize the attribute allocation we are done. */
if (new_size <= attr_len)
goto done_unm;