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Message-Id: <20210322144916.137245-15-mszeredi@redhat.com>
Date: Mon, 22 Mar 2021 15:49:12 +0100
From: Miklos Szeredi <mszeredi@...hat.com>
To: linux-fsdevel@...r.kernel.org
Cc: Al Viro <viro@...IV.linux.org.uk>, linux-kernel@...r.kernel.org,
Christoph Hellwig <hch@....de>,
Ryusuke Konishi <konishi.ryusuke@...il.com>
Subject: [PATCH v2 14/18] nilfs2: convert to miscattr
Use the miscattr API to let the VFS handle locking, permission checking and
conversion.
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Cc: Ryusuke Konishi <konishi.ryusuke@...il.com>
---
fs/nilfs2/file.c | 2 ++
fs/nilfs2/ioctl.c | 61 ++++++++++++++---------------------------------
fs/nilfs2/namei.c | 2 ++
fs/nilfs2/nilfs.h | 3 +++
4 files changed, 25 insertions(+), 43 deletions(-)
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index e1bd592ce700..e2716ce4b95e 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -148,6 +148,8 @@ const struct inode_operations nilfs_file_inode_operations = {
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
+ .miscattr_get = nilfs_miscattr_get,
+ .miscattr_set = nilfs_miscattr_set,
};
/* end of file */
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index b053b40315bf..4bb5f09b6efa 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -16,6 +16,7 @@
#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
#include <linux/buffer_head.h>
+#include <linux/miscattr.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
@@ -113,51 +114,39 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
}
/**
- * nilfs_ioctl_getflags - ioctl to support lsattr
+ * nilfs_miscattr_get - ioctl to support lsattr
*/
-static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
+int nilfs_miscattr_get(struct dentry *dentry, struct miscattr *ma)
{
- unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
+ struct inode *inode = d_inode(dentry);
- return put_user(flags, (int __user *)argp);
+ miscattr_fill_flags(ma, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE);
+
+ return 0;
}
/**
- * nilfs_ioctl_setflags - ioctl to support chattr
+ * nilfs_miscattr_set - ioctl to support chattr
*/
-static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
- void __user *argp)
+int nilfs_miscattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct miscattr *ma)
{
+ struct inode *inode = d_inode(dentry);
struct nilfs_transaction_info ti;
unsigned int flags, oldflags;
int ret;
- if (!inode_owner_or_capable(&init_user_ns, inode))
- return -EACCES;
-
- if (get_user(flags, (int __user *)argp))
- return -EFAULT;
-
- ret = mnt_want_write_file(filp);
- if (ret)
- return ret;
-
- flags = nilfs_mask_flags(inode->i_mode, flags);
-
- inode_lock(inode);
-
- oldflags = NILFS_I(inode)->i_flags;
+ if (miscattr_has_xattr(ma))
+ return -EOPNOTSUPP;
- ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
- if (ret)
- goto out;
+ flags = nilfs_mask_flags(inode->i_mode, ma->flags);
ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
if (ret)
- goto out;
+ return ret;
- NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
- (flags & FS_FL_USER_MODIFIABLE);
+ oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE;
+ NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE);
nilfs_set_inode_flags(inode);
inode->i_ctime = current_time(inode);
@@ -165,11 +154,7 @@ static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
nilfs_set_transaction_flag(NILFS_TI_SYNC);
nilfs_mark_inode_dirty(inode);
- ret = nilfs_transaction_commit(inode->i_sb);
-out:
- inode_unlock(inode);
- mnt_drop_write_file(filp);
- return ret;
+ return nilfs_transaction_commit(inode->i_sb);
}
/**
@@ -1282,10 +1267,6 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
switch (cmd) {
- case FS_IOC_GETFLAGS:
- return nilfs_ioctl_getflags(inode, argp);
- case FS_IOC_SETFLAGS:
- return nilfs_ioctl_setflags(inode, filp, argp);
case FS_IOC_GETVERSION:
return nilfs_ioctl_getversion(inode, argp);
case NILFS_IOCTL_CHANGE_CPMODE:
@@ -1331,12 +1312,6 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
- case FS_IOC32_GETFLAGS:
- cmd = FS_IOC_GETFLAGS;
- break;
- case FS_IOC32_SETFLAGS:
- cmd = FS_IOC_SETFLAGS;
- break;
case FS_IOC32_GETVERSION:
cmd = FS_IOC_GETVERSION;
break;
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index ecace5f96a95..5ed4b824a8fa 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -552,6 +552,8 @@ const struct inode_operations nilfs_dir_inode_operations = {
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
+ .miscattr_get = nilfs_miscattr_get,
+ .miscattr_set = nilfs_miscattr_set,
};
const struct inode_operations nilfs_special_inode_operations = {
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index c4a45a081ade..03184ea11287 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -243,6 +243,9 @@ extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
/* ioctl.c */
+int nilfs_miscattr_get(struct dentry *dentry, struct miscattr *m);
+int nilfs_miscattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct miscattr *ma);
long nilfs_ioctl(struct file *, unsigned int, unsigned long);
long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,
--
2.30.2
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