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Message-Id: <20210325193755.294925-17-mszeredi@redhat.com>
Date: Thu, 25 Mar 2021 20:37:53 +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,
Jan Kara <jack@...e.cz>
Subject: [PATCH v3 16/18] reiserfs: convert to fileattr
Use the fileattr API to let the VFS handle locking, permission checking and
conversion.
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Cc: Jan Kara <jack@...e.cz>
---
fs/reiserfs/file.c | 2 +
fs/reiserfs/ioctl.c | 121 +++++++++++++++++++----------------------
fs/reiserfs/namei.c | 2 +
fs/reiserfs/reiserfs.h | 7 ++-
fs/reiserfs/super.c | 2 +-
5 files changed, 64 insertions(+), 70 deletions(-)
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 1db0254bc38b..203a47232707 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -258,4 +258,6 @@ const struct inode_operations reiserfs_file_inode_operations = {
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
.set_acl = reiserfs_set_acl,
+ .fileattr_get = reiserfs_fileattr_get,
+ .fileattr_set = reiserfs_fileattr_set,
};
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 4f1cbd930179..4b86ecf5817e 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -10,6 +10,59 @@
#include <linux/uaccess.h>
#include <linux/pagemap.h>
#include <linux/compat.h>
+#include <linux/fileattr.h>
+
+int reiserfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
+{
+ struct inode *inode = d_inode(dentry);
+
+ if (!reiserfs_attrs(inode->i_sb))
+ return -ENOTTY;
+
+ fileattr_fill_flags(fa, REISERFS_I(inode)->i_attrs);
+
+ return 0;
+}
+
+int reiserfs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa)
+{
+ struct inode *inode = d_inode(dentry);
+ unsigned int flags = fa->flags;
+ int err;
+
+ reiserfs_write_lock(inode->i_sb);
+
+ err = -ENOTTY;
+ if (!reiserfs_attrs(inode->i_sb))
+ goto unlock;
+
+ err = -EOPNOTSUPP;
+ if (fileattr_has_fsx(fa))
+ goto unlock;
+
+ /*
+ * Is it quota file? Do not allow user to mess with it
+ */
+ err = -EPERM;
+ if (IS_NOQUOTA(inode))
+ goto unlock;
+
+ if ((flags & REISERFS_NOTAIL_FL) && S_ISREG(inode->i_mode)) {
+ err = reiserfs_unpack(inode);
+ if (err)
+ goto unlock;
+ }
+ sd_attrs_to_i_attrs(flags, inode);
+ REISERFS_I(inode)->i_attrs = flags;
+ inode->i_ctime = current_time(inode);
+ mark_inode_dirty(inode);
+ err = 0;
+unlock:
+ reiserfs_write_unlock(inode->i_sb);
+
+ return err;
+}
/*
* reiserfs_ioctl - handler for ioctl for inode
@@ -23,7 +76,6 @@
long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
- unsigned int flags;
int err = 0;
reiserfs_write_lock(inode->i_sb);
@@ -32,7 +84,7 @@ long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
case REISERFS_IOC_UNPACK:
if (S_ISREG(inode->i_mode)) {
if (arg)
- err = reiserfs_unpack(inode, filp);
+ err = reiserfs_unpack(inode);
} else
err = -ENOTTY;
break;
@@ -40,63 +92,6 @@ long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
* following two cases are taken from fs/ext2/ioctl.c by Remy
* Card (card@...i.ibp.fr)
*/
- case REISERFS_IOC_GETFLAGS:
- if (!reiserfs_attrs(inode->i_sb)) {
- err = -ENOTTY;
- break;
- }
-
- flags = REISERFS_I(inode)->i_attrs;
- err = put_user(flags, (int __user *)arg);
- break;
- case REISERFS_IOC_SETFLAGS:{
- if (!reiserfs_attrs(inode->i_sb)) {
- err = -ENOTTY;
- break;
- }
-
- err = mnt_want_write_file(filp);
- if (err)
- break;
-
- if (!inode_owner_or_capable(&init_user_ns, inode)) {
- err = -EPERM;
- goto setflags_out;
- }
- if (get_user(flags, (int __user *)arg)) {
- err = -EFAULT;
- goto setflags_out;
- }
- /*
- * Is it quota file? Do not allow user to mess with it
- */
- if (IS_NOQUOTA(inode)) {
- err = -EPERM;
- goto setflags_out;
- }
- err = vfs_ioc_setflags_prepare(inode,
- REISERFS_I(inode)->i_attrs,
- flags);
- if (err)
- goto setflags_out;
- if ((flags & REISERFS_NOTAIL_FL) &&
- S_ISREG(inode->i_mode)) {
- int result;
-
- result = reiserfs_unpack(inode, filp);
- if (result) {
- err = result;
- goto setflags_out;
- }
- }
- sd_attrs_to_i_attrs(flags, inode);
- REISERFS_I(inode)->i_attrs = flags;
- inode->i_ctime = current_time(inode);
- mark_inode_dirty(inode);
-setflags_out:
- mnt_drop_write_file(filp);
- break;
- }
case REISERFS_IOC_GETVERSION:
err = put_user(inode->i_generation, (int __user *)arg);
break;
@@ -138,12 +133,6 @@ long reiserfs_compat_ioctl(struct file *file, unsigned int cmd,
case REISERFS_IOC32_UNPACK:
cmd = REISERFS_IOC_UNPACK;
break;
- case REISERFS_IOC32_GETFLAGS:
- cmd = REISERFS_IOC_GETFLAGS;
- break;
- case REISERFS_IOC32_SETFLAGS:
- cmd = REISERFS_IOC_SETFLAGS;
- break;
case REISERFS_IOC32_GETVERSION:
cmd = REISERFS_IOC_GETVERSION;
break;
@@ -165,7 +154,7 @@ int reiserfs_commit_write(struct file *f, struct page *page,
* Function try to convert tail from direct item into indirect.
* It set up nopack attribute in the REISERFS_I(inode)->nopack
*/
-int reiserfs_unpack(struct inode *inode, struct file *filp)
+int reiserfs_unpack(struct inode *inode)
{
int retval = 0;
int index;
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index e6eb05e2b2f1..017db70d0f48 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1660,6 +1660,8 @@ const struct inode_operations reiserfs_dir_inode_operations = {
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
.set_acl = reiserfs_set_acl,
+ .fileattr_get = reiserfs_fileattr_get,
+ .fileattr_set = reiserfs_fileattr_set,
};
/*
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 0ca2ac62e534..3aa928ec527a 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -18,8 +18,6 @@
/* the 32 bit compat definitions with int argument */
#define REISERFS_IOC32_UNPACK _IOW(0xCD, 1, int)
-#define REISERFS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
-#define REISERFS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
#define REISERFS_IOC32_GETVERSION FS_IOC32_GETVERSION
#define REISERFS_IOC32_SETVERSION FS_IOC32_SETVERSION
@@ -3408,7 +3406,10 @@ __u32 r5_hash(const signed char *msg, int len);
#define SPARE_SPACE 500
/* prototypes from ioctl.c */
+int reiserfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
+int reiserfs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa);
long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
long reiserfs_compat_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
-int reiserfs_unpack(struct inode *inode, struct file *filp);
+int reiserfs_unpack(struct inode *inode);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 1b9c7a387dc7..3ffafc73acf0 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -2408,7 +2408,7 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
* IO to work
*/
if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
- err = reiserfs_unpack(inode, NULL);
+ err = reiserfs_unpack(inode);
if (err) {
reiserfs_warning(sb, "super-6520",
"Unpacking tail of quota file failed"
--
2.30.2
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