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ext4: add a new ioctl EXT4_IOC_GETSTATE

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The new ioctl EXT4_IOC_GETSTATE returns some of the dynamic state of
an ext4 inode for debugging purposes.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2019-08-11 16:31:41 -04:00
parent b0c013e292
commit 1ad3ea6e0a
2 changed files with 28 additions and 0 deletions
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17
fs/ext4/ioctl.c
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@@ -1123,6 +1123,22 @@ resizefs_out:
return 0;
}
case EXT4_IOC_GETSTATE:
{
__u32 state = 0;
if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
state |= EXT4_STATE_FLAG_EXT_PRECACHED;
if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
state |= EXT4_STATE_FLAG_NEW;
if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
state |= EXT4_STATE_FLAG_NEWENTRY;
if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
return put_user(state, (__u32 __user *) arg);
}
case EXT4_IOC_FSGETXATTR:
{
struct fsxattr fa;
@@ -1242,6 +1258,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case EXT4_IOC_SHUTDOWN:
case FS_IOC_GETFSMAP:
case EXT4_IOC_CLEAR_ES_CACHE:
case EXT4_IOC_GETSTATE:
break;
default:
return -ENOIOCTLCMD;