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Date: Wed, 3 Feb 2021 13:41:06 +0100
From: Miklos Szeredi <mszeredi@...hat.com>
To: linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 12/18] hfsplus: 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>
---
fs/hfsplus/dir.c | 2 +
fs/hfsplus/hfsplus_fs.h | 13 +------
fs/hfsplus/inode.c | 53 ++++++++++++++++++++++++++
fs/hfsplus/ioctl.c | 84 -----------------------------------------
4 files changed, 57 insertions(+), 95 deletions(-)
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 29a9dcfbe81f..8ac85c3f01df 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -567,6 +567,8 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.rename = hfsplus_rename,
.getattr = hfsplus_getattr,
.listxattr = hfsplus_listxattr,
+ .miscattr_get = hfsplus_miscattr_get,
+ .miscattr_set = hfsplus_miscattr_set,
};
const struct file_operations hfsplus_dir_operations = {
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index a92de5199ec3..55613fd3d176 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -344,17 +344,6 @@ static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
#define hfs_brec_goto hfsplus_brec_goto
#define hfs_part_find hfsplus_part_find
-/*
- * definitions for ext2 flag ioctls (linux really needs a generic
- * interface for this).
- */
-
-/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
- * chattr/lsattr */
-#define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
-#define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
-
-
/*
* hfs+-specific ioctl for making the filesystem bootable
*/
@@ -492,6 +481,8 @@ int hfsplus_getattr(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags);
int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
int datasync);
+int hfsplus_miscattr_get(struct dentry *dentry, struct miscattr *ma);
+int hfsplus_miscattr_set(struct dentry *dentry, struct miscattr *ma);
/* ioctl.c */
long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index e3da9e96b835..400c7999968c 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -17,6 +17,7 @@
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/uio.h>
+#include <linux/miscattr.h>
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
@@ -351,6 +352,8 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.setattr = hfsplus_setattr,
.getattr = hfsplus_getattr,
.listxattr = hfsplus_listxattr,
+ .miscattr_get = hfsplus_miscattr_get,
+ .miscattr_set = hfsplus_miscattr_set,
};
static const struct file_operations hfsplus_file_operations = {
@@ -626,3 +629,53 @@ int hfsplus_cat_write_inode(struct inode *inode)
hfs_find_exit(&fd);
return 0;
}
+
+int hfsplus_miscattr_get(struct dentry *dentry, struct miscattr *ma)
+{
+ struct inode *inode = d_inode(dentry);
+ struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
+ unsigned int flags = 0;
+
+ if (inode->i_flags & S_IMMUTABLE)
+ flags |= FS_IMMUTABLE_FL;
+ if (inode->i_flags & S_APPEND)
+ flags |= FS_APPEND_FL;
+ if (hip->userflags & HFSPLUS_FLG_NODUMP)
+ flags |= FS_NODUMP_FL;
+
+ miscattr_fill_flags(ma, flags);
+
+ return 0;
+}
+
+int hfsplus_miscattr_set(struct dentry *dentry, struct miscattr *ma)
+{
+ struct inode *inode = d_inode(dentry);
+ struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
+ unsigned int new_fl = 0;
+
+ if (miscattr_has_xattr(ma))
+ return -EOPNOTSUPP;
+
+ /* don't silently ignore unsupported ext2 flags */
+ if (ma->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
+ return -EOPNOTSUPP;
+
+ if (ma->flags & FS_IMMUTABLE_FL)
+ new_fl |= S_IMMUTABLE;
+
+ if (ma->flags & FS_APPEND_FL)
+ new_fl |= S_APPEND;
+
+ inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
+
+ if (ma->flags & FS_NODUMP_FL)
+ hip->userflags |= HFSPLUS_FLG_NODUMP;
+ else
+ hip->userflags &= ~HFSPLUS_FLG_NODUMP;
+
+ inode->i_ctime = current_time(inode);
+ mark_inode_dirty(inode);
+
+ return 0;
+}
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c
index ce15b9496b77..5661a2e24d03 100644
--- a/fs/hfsplus/ioctl.c
+++ b/fs/hfsplus/ioctl.c
@@ -57,95 +57,11 @@ static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags)
return 0;
}
-static inline unsigned int hfsplus_getflags(struct inode *inode)
-{
- struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
- unsigned int flags = 0;
-
- if (inode->i_flags & S_IMMUTABLE)
- flags |= FS_IMMUTABLE_FL;
- if (inode->i_flags & S_APPEND)
- flags |= FS_APPEND_FL;
- if (hip->userflags & HFSPLUS_FLG_NODUMP)
- flags |= FS_NODUMP_FL;
- return flags;
-}
-
-static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
-{
- struct inode *inode = file_inode(file);
- unsigned int flags = hfsplus_getflags(inode);
-
- return put_user(flags, user_flags);
-}
-
-static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
-{
- struct inode *inode = file_inode(file);
- struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
- unsigned int flags, new_fl = 0;
- unsigned int oldflags = hfsplus_getflags(inode);
- int err = 0;
-
- err = mnt_want_write_file(file);
- if (err)
- goto out;
-
- if (!inode_owner_or_capable(inode)) {
- err = -EACCES;
- goto out_drop_write;
- }
-
- if (get_user(flags, user_flags)) {
- err = -EFAULT;
- goto out_drop_write;
- }
-
- inode_lock(inode);
-
- err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
- if (err)
- goto out_unlock_inode;
-
- /* don't silently ignore unsupported ext2 flags */
- if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) {
- err = -EOPNOTSUPP;
- goto out_unlock_inode;
- }
-
- if (flags & FS_IMMUTABLE_FL)
- new_fl |= S_IMMUTABLE;
-
- if (flags & FS_APPEND_FL)
- new_fl |= S_APPEND;
-
- inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
-
- if (flags & FS_NODUMP_FL)
- hip->userflags |= HFSPLUS_FLG_NODUMP;
- else
- hip->userflags &= ~HFSPLUS_FLG_NODUMP;
-
- inode->i_ctime = current_time(inode);
- mark_inode_dirty(inode);
-
-out_unlock_inode:
- inode_unlock(inode);
-out_drop_write:
- mnt_drop_write_file(file);
-out:
- return err;
-}
-
long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
switch (cmd) {
- case HFSPLUS_IOC_EXT2_GETFLAGS:
- return hfsplus_ioctl_getflags(file, argp);
- case HFSPLUS_IOC_EXT2_SETFLAGS:
- return hfsplus_ioctl_setflags(file, argp);
case HFSPLUS_IOC_BLESS:
return hfsplus_ioctl_bless(file, argp);
default:
--
2.26.2
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