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bcachefs: implement FS_IOC_GETVERSION to support lsattr

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In this patch we add the FS_IOC_GETVERSION ioctl for getting
i_generation from inode, after that, users can list file's
generation number by using "lsattr".

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Hongbo Li 2024-06-03 21:26:18 +08:00 committed by Kent Overstreet
parent 889fb3dc5d
commit 8a4ef7e28a
1 changed files with 9 additions and 1 deletions
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10
fs/bcachefs/fs-ioctl.c
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@ -272,6 +272,11 @@ err1:
return ret;
}
static int bch2_ioc_getversion(struct bch_inode_info *inode, u32 __user *arg)
{
return put_user(inode->v.i_generation, arg);
}
static int bch2_ioc_goingdown(struct bch_fs *c, u32 __user *arg)
{
u32 flags;
@ -499,7 +504,7 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
break;
case FS_IOC_GETVERSION:
ret = -ENOTTY;
ret = bch2_ioc_getversion(inode, (u32 __user *) arg);
break;
case FS_IOC_SETVERSION:
@ -547,6 +552,9 @@ long bch2_compat_fs_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case FS_IOC32_SETFLAGS:
cmd = FS_IOC_SETFLAGS;
break;
case FS_IOC32_GETVERSION:
cmd = FS_IOC_GETVERSION;
break;
default:
return -ENOIOCTLCMD;
}