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authorDarrick J. Wong <darrick.wong@oracle.com>2019-07-01 08:25:34 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2019-07-01 08:25:34 -0700
commit5aca284210ce827f780ea2f4f9c6ab8d6e2d6648 (patch)
tree485c43c3dd95105dccf7fcc32934112a76ea2129 /fs/hfsplus
parentd1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff)
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vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
Create a generic function to check incoming FS_IOC_SETFLAGS flag values and later prepare the inode for updates so that we can standardize the implementations that follow ext4's flag values. Note that the efivarfs implementation no longer fails a no-op SETFLAGS without CAP_LINUX_IMMUTABLE since that's the behavior in ext*. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: David Sterba <dsterba@suse.com> Reviewed-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/hfsplus')
-rw-r--r--fs/hfsplus/ioctl.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c
index 5e6502ef7415..ce15b9496b77 100644
--- a/fs/hfsplus/ioctl.c
+++ b/fs/hfsplus/ioctl.c
@@ -57,9 +57,8 @@ static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags)
return 0;
}
-static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
+static inline unsigned int hfsplus_getflags(struct inode *inode)
{
- struct inode *inode = file_inode(file);
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
unsigned int flags = 0;
@@ -69,6 +68,13 @@ static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
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);
}
@@ -78,6 +84,7 @@ 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);
@@ -96,13 +103,9 @@ static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
inode_lock(inode);
- if ((flags & (FS_IMMUTABLE_FL|FS_APPEND_FL)) ||
- inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
- if (!capable(CAP_LINUX_IMMUTABLE)) {
- err = -EPERM;
- goto out_unlock_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)) {