diff options
| -rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 11 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 10 |
2 files changed, 20 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 77c06850ac52..1489bce07d66 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -482,7 +482,16 @@ struct xfs_ireq { uint64_t reserved[2]; /* must be zero */ }; -#define XFS_IREQ_FLAGS_ALL (0) +/* + * The @ino value is a special value, not a literal inode number. See the + * XFS_IREQ_SPECIAL_* values below. + */ +#define XFS_IREQ_SPECIAL (1 << 0) + +#define XFS_IREQ_FLAGS_ALL (XFS_IREQ_SPECIAL) + +/* Operate on the root directory inode. */ +#define XFS_IREQ_SPECIAL_ROOT (1) /* * ioctl structures for v5 bulkstat and inumbers requests diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index f71341cd8340..3bb5f980fabf 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -961,6 +961,16 @@ xfs_ireq_setup( memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) return -EINVAL; + if (hdr->flags & XFS_IREQ_SPECIAL) { + switch (hdr->ino) { + case XFS_IREQ_SPECIAL_ROOT: + hdr->ino = mp->m_sb.sb_rootino; + break; + default: + return -EINVAL; + } + } + if (XFS_INO_TO_AGNO(mp, hdr->ino) >= mp->m_sb.sb_agcount) return -EINVAL; |