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Message-Id: <1219944473-8770-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Date: Thu, 28 Aug 2008 22:57:51 +0530 From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> To: cmm@...ibm.com, tytso@....edu, sandeen@...hat.com Cc: linux-ext4@...r.kernel.org, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> Subject: [PATCH] ext4: truncate block allocated on a failed ext4_write_begin For blocksize < pagesize we need to remove blocks that got allocte in block_wirte_begin if we fail with ENOSPC for later blocks. block_write_begin internally does this if it allocated page locally. This make sure we don't have blocks outisde inode.i_size during ENOSPC Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com> --- fs/ext4/inode.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 473d888..a8c6bc8 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1394,6 +1394,13 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, unlock_page(page); ext4_journal_stop(handle); page_cache_release(page); + /* + * block_write_begin may have instantiated a few blocks + * outside i_size. Trim these off again. Don't need + * i_size_read because we hold i_mutex. + */ + if (pos + len > inode->i_size) + vmtruncate(inode, inode->i_size); } if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) -- 1.6.0.1.90.g27a6e -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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