Add kf_file_nlink field to kf_file and populate it
This will allow user-space programs (e.g. lsof) to locate deleted files whose nlink equals zero. Prior to this commit, programs has to use stat(kf_path) to get nlink, but that will fail if the file is deleted. [mjg: s/fail/file in the commit message] Reviewed by: mjg Differential Revision: https://reviews.freebsd.org/D38169
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@ -2792,6 +2792,7 @@ vn_fill_kinfo_vnode(struct vnode *vp, struct kinfo_file *kif)
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kif->kf_un.kf_file.kf_file_rdev = va.va_rdev;
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kif->kf_un.kf_file.kf_file_rdev_freebsd11 =
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kif->kf_un.kf_file.kf_file_rdev; /* truncate */
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kif->kf_un.kf_file.kf_file_nlink = va.va_nlink;
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return (0);
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}
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@ -389,7 +389,9 @@ struct kinfo_file {
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int kf_file_type;
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/* Space for future use */
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int kf_spareint[3];
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uint64_t kf_spareint64[30];
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uint64_t kf_spareint64[29];
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/* Number of references to file. */
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uint64_t kf_file_nlink;
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/* Vnode filesystem id. */
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uint64_t kf_file_fsid;
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/* File device. */
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