[LU-5000] lustre_idl.h compilation regression from ORNL-10

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.4.0, Lustre 2.4.1, Lustre 2.5.0, Lustre 2.4.2, Lustre 2.5.1, Lustre 2.4.3
• Severity: 3
• Assignee: John Hammond
• Reporter: Christopher Morrone (Inactive)

Description

Commit d190c63f, "ORNL-10: Basic IR implementation" broke the compilation of lustre_idl.h in user space. lustre_idl.h is packaged for installation in user space. We cannot rely on lustre's internals to be available when lustre_idl.h is compiled.

In particular, the bug is here:

struct mgs_nidtbl_entry {
        __u64           mne_version;    /* table version of this entry */
        __u32           mne_instance;   /* target instance # */
        __u32           mne_index;      /* target index */
        __u32           mne_length;     /* length of this entry - by bytes */
        __u8            mne_type;       /* target type LDD_F_SV_TYPE_OST/MDT */
        __u8            mne_nid_type;   /* type of nid(mbz). for ipv6. */
        __u8            mne_nid_size;   /* size of each NID, by bytes */
        __u8            mne_nid_count;  /* # of NIDs in buffer */
        union { 
                lnet_nid_t nids[0];     /* variable size buffer for NIDs. */
        } u;
};

lnet_nid_t is not defined in lustre_idl.h.

Issue Links

• is blocking: LU-5011 lustre_idl.h again does not compile in user space
• is related to: LU-6245 Untangle userland and kernel space support for libcfs
• is related to: LU-6401 Untangle lustre userland and kernel headers