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Message-ID: <156151634648.2283456.13503181576369039474.stgit@magnolia>
Date: Tue, 25 Jun 2019 19:32:26 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: matthew.garrett@...ula.com, yuchao0@...wei.com, tytso@....edu,
darrick.wong@...cle.com, shaggy@...nel.org,
ard.biesheuvel@...aro.org, josef@...icpanda.com, hch@...radead.org,
clm@...com, adilger.kernel@...ger.ca, jk@...abs.org, jack@...e.com,
dsterba@...e.com, jaegeuk@...nel.org, viro@...iv.linux.org.uk
Cc: cluster-devel@...hat.com, jfs-discussion@...ts.sourceforge.net,
linux-efi@...r.kernel.org, Jan Kara <jack@...e.cz>,
reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net, linux-xfs@...r.kernel.org,
linux-nilfs@...r.kernel.org, linux-mtd@...ts.infradead.org,
ocfs2-devel@....oracle.com, linux-fsdevel@...r.kernel.org,
linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: [PATCH 3/5] vfs: teach vfs_ioc_fssetxattr_check to check project id
info
From: Darrick J. Wong <darrick.wong@...cle.com>
Standardize the project id checks for FSSETXATTR.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
Reviewed-by: Jan Kara <jack@...e.cz>
---
fs/ext4/ioctl.c | 27 ---------------------------
fs/f2fs/file.c | 27 ---------------------------
fs/inode.c | 13 +++++++++++++
fs/xfs/xfs_ioctl.c | 15 ---------------
4 files changed, 13 insertions(+), 69 deletions(-)
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index ebcc173d1e7d..1e88c3af9a8d 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -697,30 +697,6 @@ static long ext4_ioctl_group_add(struct file *file,
return err;
}
-static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
-{
- /*
- * Project Quota ID state is only allowed to change from within the init
- * namespace. Enforce that restriction only if we are trying to change
- * the quota ID state. Everything else is allowed in user namespaces.
- */
- if (current_user_ns() == &init_user_ns)
- return 0;
-
- if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid)
- return -EINVAL;
-
- if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) {
- if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
- return -EINVAL;
- } else {
- if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
- return -EINVAL;
- }
-
- return 0;
-}
-
static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
{
struct ext4_inode_info *ei = EXT4_I(inode);
@@ -1133,9 +1109,6 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
inode_lock(inode);
ext4_fill_fsxattr(inode, &old_fa);
- err = ext4_ioctl_check_project(inode, &fa);
- if (err)
- goto out;
err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
if (err)
goto out;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 555b970f7945..d6ed319388d6 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2797,30 +2797,6 @@ static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
return 0;
}
-static int f2fs_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
-{
- /*
- * Project Quota ID state is only allowed to change from within the init
- * namespace. Enforce that restriction only if we are trying to change
- * the quota ID state. Everything else is allowed in user namespaces.
- */
- if (current_user_ns() == &init_user_ns)
- return 0;
-
- if (__kprojid_val(F2FS_I(inode)->i_projid) != fa->fsx_projid)
- return -EINVAL;
-
- if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) {
- if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
- return -EINVAL;
- } else {
- if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
- return -EINVAL;
- }
-
- return 0;
-}
-
static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -2848,9 +2824,6 @@ static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
return err;
inode_lock(inode);
- err = f2fs_ioctl_check_project(inode, &fa);
- if (err)
- goto out;
f2fs_fill_fsxattr(inode, &old_fa);
err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
diff --git a/fs/inode.c b/fs/inode.c
index fdd6c5d3e48d..c4f8fb16f633 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -2234,6 +2234,19 @@ int vfs_ioc_fssetxattr_check(struct inode *inode, const struct fsxattr *old_fa,
!capable(CAP_LINUX_IMMUTABLE))
return -EPERM;
+ /*
+ * Project Quota ID state is only allowed to change from within the init
+ * namespace. Enforce that restriction only if we are trying to change
+ * the quota ID state. Everything else is allowed in user namespaces.
+ */
+ if (current_user_ns() != &init_user_ns) {
+ if (old_fa->fsx_projid != fa->fsx_projid)
+ return -EINVAL;
+ if ((old_fa->fsx_xflags ^ fa->fsx_xflags) &
+ FS_XFLAG_PROJINHERIT)
+ return -EINVAL;
+ }
+
return 0;
}
EXPORT_SYMBOL(vfs_ioc_fssetxattr_check);
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 08ec1e458865..d8c02b9905a7 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1299,21 +1299,6 @@ xfs_ioctl_setattr_check_projid(
if (fa->fsx_projid > (uint16_t)-1 &&
!xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
return -EINVAL;
-
- /*
- * Project Quota ID state is only allowed to change from within the init
- * namespace. Enforce that restriction only if we are trying to change
- * the quota ID state. Everything else is allowed in user namespaces.
- */
- if (current_user_ns() == &init_user_ns)
- return 0;
-
- if (xfs_get_projid(ip) != fa->fsx_projid)
- return -EINVAL;
- if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
- (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
- return -EINVAL;
-
return 0;
}
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