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Date: Fri, 08 Feb 2008 14:27:11 -0800 From: Dave Hansen <haveblue@...ibm.com> To: linux-kernel@...r.kernel.org Cc: hch@....de, viro@...IV.linux.org.uk, viro@....linux.org.uk, miklos@...redi.hu, Dave Hansen <haveblue@...ibm.com> Subject: [RFC][PATCH 18/30] r/o bind mounts: write counts for link/symlink Signed-off-by: Dave Hansen <haveblue@...ibm.com> --- linux-2.6.git-dave/fs/namei.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff -puN fs/namei.c~r-o-bind-mounts-elevate-write-count-for-link-and-symlink-calls fs/namei.c --- linux-2.6.git/fs/namei.c~r-o-bind-mounts-elevate-write-count-for-link-and-symlink-calls 2008-02-08 13:04:54.000000000 -0800 +++ linux-2.6.git-dave/fs/namei.c 2008-02-08 13:04:54.000000000 -0800 @@ -2363,7 +2363,12 @@ asmlinkage long sys_symlinkat(const char if (IS_ERR(dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO); + mnt_drop_write(nd.mnt); +out_dput: dput(dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); @@ -2458,7 +2463,12 @@ asmlinkage long sys_linkat(int olddfd, c error = PTR_ERR(new_dentry); if (IS_ERR(new_dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry); + mnt_drop_write(nd.mnt); +out_dput: dput(new_dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); _ -- 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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