diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_format.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index c6a3e71f99eb..bf96b006bd24 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -175,6 +175,14 @@ typedef struct xfs_sb { xfs_lsn_t sb_lsn; /* last write sequence */ uuid_t sb_meta_uuid; /* metadata file system unique id */ + /* + * Metadata Directory Inode. On disk this lives in the sb_rbmino slot, + * but we continue to use the in-core superblock to cache the classic + * inodes (rt bitmap; rt summary; user, group, and project quotas) so + * we cache the metadir inode value here too. + */ + xfs_ino_t sb_metadirino; + /* must be padded to 64 bit alignment */ } xfs_sb_t; @@ -193,7 +201,14 @@ typedef struct xfs_dsb { uuid_t sb_uuid; /* user-visible file system unique id */ __be64 sb_logstart; /* starting block of log if internal */ __be64 sb_rootino; /* root inode number */ - __be64 sb_rbmino; /* bitmap inode for realtime extents */ + /* + * bitmap inode for realtime extents. + * + * The metadata directory feature uses the sb_rbmino field to point to + * the root of the metadata directory tree. All other sb inode + * pointers are no longer used. + */ + __be64 sb_rbmino; __be64 sb_rsumino; /* summary inode for rt bitmap */ __be32 sb_rextsize; /* realtime extent size, blocks */ __be32 sb_agblocks; /* size of an allocation group */ @@ -468,6 +483,7 @@ xfs_sb_has_ro_compat_feature( #define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */ #define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */ #define XFS_SB_FEAT_INCOMPAT_BIGTIME (1 << 3) /* large timestamps */ +#define XFS_SB_FEAT_INCOMPAT_METADIR (1 << 4) /* metadata ino dir */ #define XFS_SB_FEAT_INCOMPAT_ALL \ (XFS_SB_FEAT_INCOMPAT_FTYPE| \ XFS_SB_FEAT_INCOMPAT_SPINODES| \ @@ -593,6 +609,12 @@ static inline bool xfs_sb_version_hasatomicswap(struct xfs_sb *sbp) XFS_SB_FEAT_INCOMPAT_LOG_ATOMIC_SWAP); } +static inline bool xfs_sb_version_hasmetadir(struct xfs_sb *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && + (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR); +} + /* * end of superblock version macros */ @@ -1174,15 +1196,25 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_REFLINK_BIT 1 /* file's blocks may be shared */ #define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */ #define XFS_DIFLAG2_BIGTIME_BIT 3 /* big timestamps */ +#define XFS_DIFLAG2_METADATA_BIT 4 /* filesystem metadata */ #define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT) #define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT) #define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT) #define XFS_DIFLAG2_BIGTIME (1 << XFS_DIFLAG2_BIGTIME_BIT) +/* + * The inode contains filesystem metadata and can be found through the metadata + * directory tree. The only valid modes are regular files and directories; + * the user, group, and project IDs must be zero; and none of the access mode + * bits can be set. Metadata inodes must never be resolvable through the root + * directory and cannot be accessed by userspace. + */ +#define XFS_DIFLAG2_METADATA (1 << XFS_DIFLAG2_METADATA_BIT) + #define XFS_DIFLAG2_ANY \ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ - XFS_DIFLAG2_BIGTIME) + XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_METADATA) static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip) { |