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xfs: Propagate dentry down to inode_change_ok()

This commit is contained in:
Salvatore Bonaccorso 2016-11-13 11:30:32 +01:00
parent b7d167eabc
commit 2683f37d06
3 changed files with 234 additions and 0 deletions
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1
debian/changelog vendored
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@ -43,6 +43,7 @@ linux (4.8.8-1) UNRELEASED; urgency=medium
[ Salvatore Bonaccorso ]
* Bump ABI to 2 and remove ABI reference for 4.8.0-1
* xfs: Propagate dentry down to inode_change_ok()
-- Salvatore Bonaccorso <carnil@debian.org> Tue, 15 Nov 2016 22:01:08 +0100

232
debian/patches/bugfix/all/xfs-Propagate-dentry-down-to-inode_change_ok.patch vendored Normal file
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@ -0,0 +1,232 @@
From: Jan Kara <jack@suse.cz>
Date: Thu, 26 May 2016 14:46:43 +0200
Subject: xfs: Propagate dentry down to inode_change_ok()
Origin: https://git.kernel.org/linus/69bca80744eef58fa155e8042996b968fec17b26
To avoid clearing of capabilities or security related extended
attributes too early, inode_change_ok() will need to take dentry instead
of inode. Propagate dentry down to functions calling inode_change_ok().
This is rather straightforward except for xfs_set_mode() function which
does not have dentry easily available. Luckily that function does not
call inode_change_ok() anyway so we just have to do a little dance with
function prototypes.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/xfs/xfs_file.c | 2 +-
fs/xfs/xfs_inode.c | 2 +-
fs/xfs/xfs_ioctl.c | 2 +-
fs/xfs/xfs_iops.c | 94 ++++++++++++++++++++++++++++++++++++------------------
fs/xfs/xfs_iops.h | 3 +-
5 files changed, 68 insertions(+), 35 deletions(-)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ed95e5b..7920520 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -973,7 +973,7 @@ xfs_file_fallocate(
iattr.ia_valid = ATTR_SIZE;
iattr.ia_size = new_size;
- error = xfs_setattr_size(ip, &iattr);
+ error = xfs_vn_setattr_size(file_dentry(file), &iattr);
if (error)
goto out_unlock;
}
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index e08eaea..df22e12 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1710,7 +1710,7 @@ xfs_inactive_truncate(
/*
* Log the inode size first to prevent stale data exposure in the event
* of a system crash before the truncate completes. See the related
- * comment in xfs_setattr_size() for details.
+ * comment in xfs_vn_setattr_size() for details.
*/
ip->i_d.di_size = 0;
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 96a70fd..0d9021f 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -720,7 +720,7 @@ xfs_ioc_space(
iattr.ia_valid = ATTR_SIZE;
iattr.ia_size = bf->l_start;
- error = xfs_setattr_size(ip, &iattr);
+ error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
break;
default:
ASSERT(0);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index ab820f8..f5db392 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -542,6 +542,30 @@ xfs_setattr_time(
inode->i_mtime = iattr->ia_mtime;
}
+static int
+xfs_vn_change_ok(
+ struct dentry *dentry,
+ struct iattr *iattr)
+{
+ struct inode *inode = d_inode(dentry);
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_mount *mp = ip->i_mount;
+
+ if (mp->m_flags & XFS_MOUNT_RDONLY)
+ return -EROFS;
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return -EIO;
+
+ return inode_change_ok(inode, iattr);
+}
+
+/*
+ * Set non-size attributes of an inode.
+ *
+ * Caution: The caller of this function is responsible for calling
+ * inode_change_ok() or otherwise verifying the change is fine.
+ */
int
xfs_setattr_nonsize(
struct xfs_inode *ip,
@@ -558,21 +582,6 @@ xfs_setattr_nonsize(
struct xfs_dquot *udqp = NULL, *gdqp = NULL;
struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
- trace_xfs_setattr(ip);
-
- /* If acls are being inherited, we already have this checked */
- if (!(flags & XFS_ATTR_NOACL)) {
- if (mp->m_flags & XFS_MOUNT_RDONLY)
- return -EROFS;
-
- if (XFS_FORCED_SHUTDOWN(mp))
- return -EIO;
-
- error = inode_change_ok(inode, iattr);
- if (error)
- return error;
- }
-
ASSERT((mask & ATTR_SIZE) == 0);
/*
@@ -743,8 +752,27 @@ xfs_setattr_nonsize(
return error;
}
+int
+xfs_vn_setattr_nonsize(
+ struct dentry *dentry,
+ struct iattr *iattr)
+{
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+ int error;
+
+ trace_xfs_setattr(ip);
+
+ error = xfs_vn_change_ok(dentry, iattr);
+ if (error)
+ return error;
+ return xfs_setattr_nonsize(ip, iattr, 0);
+}
+
/*
* Truncate file. Must have write permission and not be a directory.
+ *
+ * Caution: The caller of this function is responsible for calling
+ * inode_change_ok() or otherwise verifying the change is fine.
*/
int
xfs_setattr_size(
@@ -759,18 +787,6 @@ xfs_setattr_size(
uint lock_flags = 0;
bool did_zeroing = false;
- trace_xfs_setattr(ip);
-
- if (mp->m_flags & XFS_MOUNT_RDONLY)
- return -EROFS;
-
- if (XFS_FORCED_SHUTDOWN(mp))
- return -EIO;
-
- error = inode_change_ok(inode, iattr);
- if (error)
- return error;
-
ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
ASSERT(S_ISREG(inode->i_mode));
@@ -942,16 +958,32 @@ xfs_setattr_size(
goto out_unlock;
}
+int
+xfs_vn_setattr_size(
+ struct dentry *dentry,
+ struct iattr *iattr)
+{
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+ int error;
+
+ trace_xfs_setattr(ip);
+
+ error = xfs_vn_change_ok(dentry, iattr);
+ if (error)
+ return error;
+ return xfs_setattr_size(ip, iattr);
+}
+
STATIC int
xfs_vn_setattr(
struct dentry *dentry,
struct iattr *iattr)
{
- struct xfs_inode *ip = XFS_I(d_inode(dentry));
int error;
if (iattr->ia_valid & ATTR_SIZE) {
- uint iolock = XFS_IOLOCK_EXCL;
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+ uint iolock = XFS_IOLOCK_EXCL;
xfs_ilock(ip, iolock);
error = xfs_break_layouts(d_inode(dentry), &iolock, true);
@@ -959,11 +991,11 @@ xfs_vn_setattr(
xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
iolock |= XFS_MMAPLOCK_EXCL;
- error = xfs_setattr_size(ip, iattr);
+ error = xfs_vn_setattr_size(dentry, iattr);
}
xfs_iunlock(ip, iolock);
} else {
- error = xfs_setattr_nonsize(ip, iattr, 0);
+ error = xfs_vn_setattr_nonsize(dentry, iattr);
}
return error;
diff --git a/fs/xfs/xfs_iops.h b/fs/xfs/xfs_iops.h
index a0f84ab..0259a38 100644
--- a/fs/xfs/xfs_iops.h
+++ b/fs/xfs/xfs_iops.h
@@ -33,6 +33,7 @@ extern ssize_t xfs_vn_listxattr(struct dentry *, char *data, size_t size);
extern void xfs_setattr_time(struct xfs_inode *ip, struct iattr *iattr);
extern int xfs_setattr_nonsize(struct xfs_inode *ip, struct iattr *vap,
int flags);
-extern int xfs_setattr_size(struct xfs_inode *ip, struct iattr *vap);
+extern int xfs_vn_setattr_nonsize(struct dentry *dentry, struct iattr *vap);
+extern int xfs_vn_setattr_size(struct dentry *dentry, struct iattr *vap);
#endif /* __XFS_IOPS_H__ */
--
2.10.2

1
debian/patches/series vendored
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@ -93,6 +93,7 @@ features/all/securelevel/arm64-add-kernel-config-option-to-set-securelevel-wh.pa
# Security fixes
bugfix/all/ptrace-being-capable-wrt-a-process-requires-mapped-uids-gids.patch
debian/i386-686-pae-pci-set-pci-nobios-by-default.patch
bugfix/all/xfs-Propagate-dentry-down-to-inode_change_ok.patch
# ABI maintenance