[PATCH 3.16 004/306] fs: Give dentry to inode_change_ok() instead of inode

Ben Hutchings
2017-02-15T23:22:26Z

From: Jan Kara <jack@suse.cz>

commit 31051c85b5e2aaaf6315f74c72a732673632a905 upstream.

inode_change_ok() will be resposible for clearing capabilities and IMA
extended attributes and as such will need dentry. Give it as an argument
to inode_change_ok() instead of an inode. Also rename inode_change_ok()
to setattr_prepare() to better relect that it does also some
modifications in addition to checks.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
[bwh: Backported to 3.16:
- Drop changes to orangefs, overlayfs
- Adjust filenames, context
- In nfsd, pass dentry to nfsd_sanitize_attrs()
- Update ext3 as well]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -287,8 +287,8 @@ implementing on-disk size changes. Star
and vmtruncate, and the reorder the vmtruncate + foofs_vmtruncate sequence to
be in order of zeroing blocks using block_truncate_page or similar helpers,
size update and on finally on-disk truncation which should not fail.
-inode_change_ok now includes the size checks for ATTR_SIZE and must be called
-in the beginning of ->setattr unconditionally.
+setattr_prepare (which used to be inode_change_ok) now includes the size checks
+for ATTR_SIZE and must be called in the beginning of ->setattr unconditionally.

[mandatory]

--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -1386,7 +1386,7 @@ int ll_setattr_raw(struct dentry *dentry
attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
}

- /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
+ /* POSIX: check before ATTR_*TIME_SET set (from setattr_prepare) */
if (attr->ia_valid & TIMES_SET_FLAGS) {
if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
!capable(CFS_CAP_FOWNER))
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1094,7 +1094,7 @@ static int v9fs_vfs_setattr(struct dentr
struct p9_wstat wstat;

p9_debug(P9_DEBUG_VFS, "\n");
- retval = inode_change_ok(dentry->d_inode, iattr);
+ retval = setattr_prepare(dentry, iattr);
if (retval)
return retval;

--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -560,7 +560,7 @@ int v9fs_vfs_setattr_dotl(struct dentry

p9_debug(P9_DEBUG_VFS, "\n");

- retval = inode_change_ok(inode, iattr);
+ retval = setattr_prepare(dentry, iattr);
if (retval)
return retval;

--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -303,7 +303,7 @@ adfs_notify_change(struct dentry *dentry
unsigned int ia_valid = attr->ia_valid;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);

/*
* we can't change the UID or GID of any file -
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -222,7 +222,7 @@ affs_notify_change(struct dentry *dentry

pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);

- error = inode_change_ok(inode,attr);
+ error = setattr_prepare(dentry, attr);
if (error)
goto out;

--- a/fs/attr.c
+++ b/fs/attr.c
@@ -17,19 +17,22 @@
#include <linux/ima.h>

/**
- * inode_change_ok - check if attribute changes to an inode are allowed
- * @inode: inode to check
+ * setattr_prepare - check if attribute changes to a dentry are allowed
+ * @dentry: dentry to check
* @attr: attributes to change
*
* Check if we are allowed to change the attributes contained in @attr
- * in the given inode. This includes the normal unix access permission
- * checks, as well as checks for rlimits and others.
+ * in the given dentry. This includes the normal unix access permission
+ * checks, as well as checks for rlimits and others. The function also clears
+ * SGID bit from mode if user is not allowed to set it. Also file capabilities
+ * and IMA extended attributes are cleared if ATTR_KILL_PRIV is set.
*
* Should be called as the first thing in ->setattr implementations,
* possibly after taking additional locks.
*/
-int inode_change_ok(const struct inode *inode, struct iattr *attr)
+int setattr_prepare(struct dentry *dentry, struct iattr *attr)
{
+ struct inode *inode = d_inode(dentry);
unsigned int ia_valid = attr->ia_valid;

/*
@@ -89,7 +92,7 @@ kill_priv:

return 0;
}
-EXPORT_SYMBOL(inode_change_ok);
+EXPORT_SYMBOL(setattr_prepare);

/**
* inode_newsize_ok - may this inode be truncated to a given size
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4690,7 +4690,7 @@ static int btrfs_setattr(struct dentry *
if (btrfs_root_readonly(root))
return -EROFS;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1708,7 +1708,7 @@ int ceph_setattr(struct dentry *dentry,
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err != 0)
return err;

--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -2074,7 +2074,7 @@ cifs_setattr_unix(struct dentry *direntr
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
attrs->ia_valid |= ATTR_FORCE;

- rc = inode_change_ok(inode, attrs);
+ rc = setattr_prepare(direntry, attrs);
if (rc < 0)
goto out;

@@ -2215,7 +2215,7 @@ cifs_setattr_nounix(struct dentry *diren
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
attrs->ia_valid |= ATTR_FORCE;

- rc = inode_change_ok(inode, attrs);
+ rc = setattr_prepare(direntry, attrs);
if (rc < 0) {
free_xid(xid);
return rc;
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -952,7 +952,7 @@ static int ecryptfs_setattr(struct dentr
}
mutex_unlock(&crypt_stat->cs_mutex);

- rc = inode_change_ok(inode, ia);
+ rc = setattr_prepare(dentry, ia);
if (rc)
goto out;
if (ia->ia_valid & ATTR_SIZE) {
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -1039,7 +1039,7 @@ int exofs_setattr(struct dentry *dentry,
if (unlikely(error))
return error;

- error = inode_change_ok(inode, iattr);
+ error = setattr_prepare(dentry, iattr);
if (unlikely(error))
return error;

--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1547,7 +1547,7 @@ int ext2_setattr(struct dentry *dentry,
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, iattr);
+ error = setattr_prepare(dentry, iattr);
if (error)
return error;

--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -3244,7 +3244,7 @@ int ext3_setattr(struct dentry *dentry,
int error, rc = 0;
const unsigned int ia_valid = attr->ia_valid;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4672,7 +4672,7 @@ int ext4_setattr(struct dentry *dentry,
int orphan = 0;
const unsigned int ia_valid = attr->ia_valid;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -500,7 +500,7 @@ int f2fs_setattr(struct dentry *dentry,
struct f2fs_inode_info *fi = F2FS_I(inode);
int err;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -394,7 +394,7 @@ int fat_setattr(struct dentry *dentry, s
attr->ia_valid &= ~TIMES_SET_FLAGS;
}

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
attr->ia_valid = ia_valid;
if (error) {
if (sbi->options.quiet)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1722,7 +1722,7 @@ int fuse_do_setattr(struct dentry *dentr
if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
attr->ia_valid |= ATTR_FORCE;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1774,7 +1774,7 @@ static int gfs2_setattr(struct dentry *d
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto out;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
goto out;

--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -604,7 +604,7 @@ int hfs_inode_setattr(struct dentry *den
struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
int error;

- error = inode_change_ok(inode, attr); /* basic permission checks */
+ error = setattr_prepare(dentry, attr); /* basic permission checks */
if (error)
return error;

--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -247,7 +247,7 @@ static int hfsplus_setattr(struct dentry
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -792,7 +792,7 @@ static int hostfs_setattr(struct dentry

int fd = HOSTFS_I(inode)->fd;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/hpfs/inode.c
+++ b/fs/hpfs/inode.c
@@ -272,7 +272,7 @@ int hpfs_setattr(struct dentry *dentry,
if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
goto out_unlock;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
goto out_unlock;

--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -429,7 +429,7 @@ static int hugetlbfs_setattr(struct dent

BUG_ON(!inode);

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -193,7 +193,7 @@ int jffs2_setattr(struct dentry *dentry,
struct inode *inode = dentry->d_inode;
int rc;

- rc = inode_change_ok(inode, iattr);
+ rc = setattr_prepare(dentry, iattr);
if (rc)
return rc;

--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -103,7 +103,7 @@ int jfs_setattr(struct dentry *dentry, s
struct inode *inode = dentry->d_inode;
int rc;

- rc = inode_change_ok(inode, iattr);
+ rc = setattr_prepare(dentry, iattr);
if (rc)
return rc;

--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -131,7 +131,7 @@ int kernfs_iop_setattr(struct dentry *de
return -EINVAL;

mutex_lock(&kernfs_mutex);
- error = inode_change_ok(inode, iattr);
+ error = setattr_prepare(dentry, iattr);
if (error)
goto out;

--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -371,7 +371,7 @@ int simple_setattr(struct dentry *dentry
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, iattr);
+ error = setattr_prepare(dentry, iattr);
if (error)
return error;

--- a/fs/logfs/file.c
+++ b/fs/logfs/file.c
@@ -244,7 +244,7 @@ static int logfs_setattr(struct dentry *
struct inode *inode = dentry->d_inode;
int err = 0;

- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -28,7 +28,7 @@ static int minix_setattr(struct dentry *
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -885,7 +885,7 @@ int ncp_notify_change(struct dentry *den
/* ageing the dentry to force validation */
ncp_age_dentry(server, dentry);

- result = inode_change_ok(inode, attr);
+ result = setattr_prepare(dentry, attr);
if (result < 0)
goto out;

--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -300,17 +300,19 @@ commit_metadata(struct svc_fh *fhp)
* NFS semantics and what Linux expects.
*/
static void
-nfsd_sanitize_attrs(struct inode *inode, struct iattr *iap)
+nfsd_sanitize_attrs(struct dentry *dentry, struct iattr *iap)
{
+ struct inode *inode = dentry->d_inode;
+
/*
* NFSv2 does not differentiate between "set-[ac]time-to-now"
* which only requires access, and "set-[ac]time-to-X" which
* requires ownership.
* So if it looks like it might be "set both to the same time which
- * is close to now", and if inode_change_ok fails, then we
+ * is close to now", and if setattr_prepare fails, then we
* convert to "set to now" instead of "set to explicit time"
*
- * We only call inode_change_ok as the last test as technically
+ * We only call setattr_prepare as the last test as technically
* it is not an interface that we should be using.
*/
#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
@@ -328,7 +330,7 @@ nfsd_sanitize_attrs(struct inode *inode,
if (delta < 0)
delta = -delta;
if (delta < MAX_TOUCH_TIME_ERROR &&
- inode_change_ok(inode, iap) != 0) {
+ setattr_prepare(dentry, iap) != 0) {
/*
* Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
* This will cause notify_change to set these times
@@ -435,7 +437,7 @@ nfsd_setattr(struct svc_rqst *rqstp, str
if (!iap->ia_valid)
goto out;

- nfsd_sanitize_attrs(inode, iap);
+ nfsd_sanitize_attrs(dentry, iap);

/*
* The size case is special, it changes the file in addition to the
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -839,7 +839,7 @@ int nilfs_setattr(struct dentry *dentry,
struct super_block *sb = inode->i_sb;
int err;

- err = inode_change_ok(inode, iattr);
+ err = setattr_prepare(dentry, iattr);
if (err)
return err;

--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2891,7 +2891,7 @@ int ntfs_setattr(struct dentry *dentry,
int err;
unsigned int ia_valid = attr->ia_valid;

- err = inode_change_ok(vi, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
goto out;
/* We do not support NTFS ACLs yet. */
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -211,7 +211,7 @@ static int dlmfs_file_setattr(struct den
struct inode *inode = dentry->d_inode;

attr->ia_valid &= ~ATTR_SIZE;
- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1144,7 +1144,7 @@ int ocfs2_setattr(struct dentry *dentry,
if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
return 0;

- status = inode_change_ok(inode, attr);
+ status = setattr_prepare(dentry, attr);
if (status)
return status;

--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -351,7 +351,7 @@ static int omfs_setattr(struct dentry *d
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -536,7 +536,7 @@ int proc_setattr(struct dentry *dentry,
if (attr->ia_valid & ATTR_MODE)
return -EPERM;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -41,7 +41,7 @@ static int proc_notify_change(struct den
struct proc_dir_entry *de = PDE(inode);
int error;

- error = inode_change_ok(inode, iattr);
+ error = setattr_prepare(dentry, iattr);
if (error)
return error;

--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -753,7 +753,7 @@ static int proc_sys_setattr(struct dentr
if (attr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
return -EPERM;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -163,7 +163,7 @@ static int ramfs_nommu_setattr(struct de
int ret = 0;

/* POSIX UID/GID verification for setting inode attributes */
- ret = inode_change_ok(inode, ia);
+ ret = setattr_prepare(dentry, ia);
if (ret)
return ret;

--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3312,7 +3312,7 @@ int reiserfs_setattr(struct dentry *dent
unsigned int ia_valid;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -35,7 +35,7 @@ static int sysv_setattr(struct dentry *d
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1262,7 +1262,7 @@ int ubifs_setattr(struct dentry *dentry,

dbg_gen("ino %lu, mode %#x, ia_valid %#x",
inode->i_ino, inode->i_mode, attr->ia_valid);
- err = inode_change_ok(inode, attr);
+ err = setattr_prepare(dentry, attr);
if (err)
return err;

--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -269,7 +269,7 @@ static int udf_setattr(struct dentry *de
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -496,7 +496,7 @@ int ufs_setattr(struct dentry *dentry, s
unsigned int ia_valid = attr->ia_valid;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;

--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -81,7 +81,7 @@ static int utimes_common(struct path *pa
newattrs.ia_valid |= ATTR_MTIME_SET;
}
/*
- * Tell inode_change_ok(), that this is an explicit time
+ * Tell setattr_prepare(), that this is an explicit time
* update, even if neither ATTR_ATIME_SET nor ATTR_MTIME_SET
* were used.
*/
@@ -90,7 +90,7 @@ static int utimes_common(struct path *pa
/*
* If times is NULL (or both times are UTIME_NOW),
* then we need to check permissions, because
- * inode_change_ok() won't do it.
+ * setattr_prepare() won't do it.
*/
error = -EACCES;
if (IS_IMMUTABLE(inode))
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -530,9 +530,7 @@ 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;
+ struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;

if (mp->m_flags & XFS_MOUNT_RDONLY)
return XFS_ERROR(EROFS);
@@ -540,14 +538,14 @@ xfs_vn_change_ok(
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);

- return XFS_ERROR(-inode_change_ok(inode, iattr));
+ return XFS_ERROR(-setattr_prepare(dentry, 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.
+ * setattr_prepare() or otherwise verifying the change is fine.
*/
int
xfs_setattr_nonsize(
@@ -758,7 +756,7 @@ xfs_vn_setattr_nonsize(
* 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.
+ * setattr_prepare() or otherwise verifying the change is fine.
*/
int
xfs_setattr_size(
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2627,7 +2627,7 @@ extern int buffer_migrate_page(struct ad
#define buffer_migrate_page NULL
#endif

-extern int inode_change_ok(const struct inode *, struct iattr *);
+extern int setattr_prepare(struct dentry *, struct iattr *);
extern int inode_newsize_ok(const struct inode *, loff_t offset);
extern void setattr_copy(struct inode *inode, const struct iattr *attr);

--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -540,7 +540,7 @@ static int shmem_setattr(struct dentry *
struct inode *inode = dentry->d_inode;
int error;

- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(dentry, attr);
if (error)
return error;