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Date: Fri, 25 Apr 2008 18:19:08 -0400 From: Erez Zadok <ezk@...sunysb.edu> To: akpm@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, viro@....linux.org.uk, hch@...radead.org, Erez Zadok <ezk@...sunysb.edu> Subject: [PATCH 12/12] Unionfs: lock parent dentry branch config in write Ensure that branch configuration is available to file_revalidate should a copyup be required. Signed-off-by: Erez Zadok <ezk@...sunysb.edu> --- fs/unionfs/file.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/fs/unionfs/file.c b/fs/unionfs/file.c index 09f594d..9b5fc58 100644 --- a/fs/unionfs/file.c +++ b/fs/unionfs/file.c @@ -55,7 +55,9 @@ static ssize_t unionfs_write(struct file *file, const char __user *buf, unionfs_read_lock(dentry->d_sb, UNIONFS_SMUTEX_PARENT); unionfs_lock_dentry(dentry, UNIONFS_DMUTEX_CHILD); - err = unionfs_file_revalidate(file, true); + if (dentry != dentry->d_parent) + unionfs_lock_dentry(dentry->d_parent, UNIONFS_DMUTEX_PARENT); + err = unionfs_file_revalidate_locked(file, true); if (unlikely(err)) goto out; @@ -72,6 +74,8 @@ static ssize_t unionfs_write(struct file *file, const char __user *buf, } out: + if (dentry != dentry->d_parent) + unionfs_unlock_dentry(dentry->d_parent); unionfs_unlock_dentry(dentry); unionfs_read_unlock(dentry->d_sb); return err; -- 1.5.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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