From: Dave Hansen <haveblue@us.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, herbert@13thfloor.at,
viro@ftp.linux.org.uk, Dave Hansen <haveblue@us.ibm.com>
Subject: [RFC][PATCH 11/20] elevate write count over calls to vfs_rename()
Date: Fri, 16 Jun 2006 16:12:21 -0700 [thread overview]
Message-ID: <20060616231221.C30C0D59@localhost.localdomain> (raw)
In-Reply-To: <20060616231213.D4C5D6AF@localhost.localdomain>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
---
lxc-dave/fs/namei.c | 4 ++++
lxc-dave/fs/nfsd/vfs.c | 12 +++++++++++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff -puN fs/namei.c~C-elevate-writers-vfs_rename-part1 fs/namei.c
--- lxc/fs/namei.c~C-elevate-writers-vfs_rename-part1 2006-06-16 15:58:06.000000000 -0700
+++ lxc-dave/fs/namei.c 2006-06-16 15:58:06.000000000 -0700
@@ -2520,8 +2520,12 @@ static int do_rename(int olddfd, const c
if (new_dentry == trap)
goto exit5;
+ error = mnt_want_write(oldnd.mnt);
+ if (error)
+ goto exit5;
error = vfs_rename(old_dir->d_inode, old_dentry,
new_dir->d_inode, new_dentry);
+ mnt_drop_write(oldnd.mnt);
exit5:
dput(new_dentry);
exit4:
diff -puN fs/nfsd/vfs.c~C-elevate-writers-vfs_rename-part1 fs/nfsd/vfs.c
--- lxc/fs/nfsd/vfs.c~C-elevate-writers-vfs_rename-part1 2006-06-16 15:58:06.000000000 -0700
+++ lxc-dave/fs/nfsd/vfs.c 2006-06-16 15:58:06.000000000 -0700
@@ -1597,13 +1597,23 @@ nfsd_rename(struct svc_rqst *rqstp, stru
err = -EPERM;
} else
#endif
+ err = mnt_want_write(ffhp->fh_export->ex_mnt);
+ if (err)
+ goto out_dput_new;
+
+ err = mnt_want_write(tfhp->fh_export->ex_mnt);
+ if (err)
+ goto out_mnt_drop_write_old;
+
err = vfs_rename(fdir, odentry, tdir, ndentry);
if (!err && EX_ISSYNC(tfhp->fh_export)) {
err = nfsd_sync_dir(tdentry);
if (!err)
err = nfsd_sync_dir(fdentry);
}
-
+ mnt_drop_write(tfhp->fh_export->ex_mnt);
+ out_mnt_drop_write_old:
+ mnt_drop_write(ffhp->fh_export->ex_mnt);
out_dput_new:
dput(ndentry);
out_dput_old:
_
next prev parent reply other threads:[~2006-06-16 23:12 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-16 23:12 [RFC][PATCH 00/20] Mount writer count and read-only bind mounts (v2) Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 01/20] prepare for write access checks: collapse if() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 02/20] r/o bind mount prepwork: move open_namei()'s vfs_create() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 03/20] Add vfsmount writer count Dave Hansen
2006-06-18 18:33 ` Al Viro
2006-06-19 17:02 ` Dave Hansen
2006-06-20 21:20 ` Al Viro
2006-06-22 17:01 ` Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 04/20] elevate mnt writers for callers of vfs_mkdir() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 05/20] elevate write count during entire ncp_ioctl() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 07/20] elevate mount count for extended attributes Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 06/20] sys_symlinkat() elevate write count around vfs_symlink() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 08/20] sys_linkat(): elevate write count around vfs_link() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 09/20] mount_is_safe(): add comment Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 10/20] unix_find_other() elevate write count for touch_atime() Dave Hansen
2006-06-16 23:12 ` Dave Hansen [this message]
2006-06-18 18:23 ` [RFC][PATCH 11/20] elevate write count over calls to vfs_rename() Al Viro
2006-06-19 17:18 ` Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 12/20] tricky: elevate write count files are open()ed Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 13/20] elevate writer count for do_sys_truncate() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 14/20] elevate write count for do_utimes() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 15/20] elevate write count for do_sys_utime() and touch_atime() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 16/20] sys_mknodat(): elevate write count for vfs_mknod/create() Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 17/20] elevate mnt writers for vfs_unlink() callers Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 19/20] elevate writer count for custom 'struct file' Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 18/20] do_rmdir(): elevate write count Dave Hansen
2006-06-16 23:12 ` [RFC][PATCH 20/20] honor r/w changes at do_remount() time Dave Hansen
2006-06-18 18:36 ` Al Viro
2006-06-19 16:45 ` Dave Hansen
2006-06-16 23:29 ` [RFC][PATCH 00/20] Mount writer count and read-only bind mounts (v2) Grzegorz Kulewski
2006-06-16 23:41 ` Dave Hansen
2006-06-17 0:10 ` Grzegorz Kulewski
2006-06-17 3:35 ` Herbert Poetzl
2006-06-17 9:36 ` Jan Engelhardt
2006-06-17 13:29 ` Herbert Poetzl
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