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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-05-11 14:01:07 -0500 |
|---|---|---|
| committer | Eric Sandeen <sandeen@redhat.com> | 2017-05-11 14:01:07 -0500 |
| commit | 9282c506a62cad473c4c5f157f3eff0b0b9c3f10 (patch) | |
| tree | d6cf5c2d5cac095fbc0f58ad011c398b9b246125 | |
| parent | 0b10a7f446749273495ea3f29e98a68cd9ba0b0e (diff) | |
| download | xfsprogs-dev-9282c506a62cad473c4c5f157f3eff0b0b9c3f10.tar.gz | |
xfs: implement the GETFSMAP ioctl
Source kernel commit: e89c041338ed6ef2694e6465ca1ba033e0a2978c
Introduce a new ioctl that uses the reverse mapping btree to return
information about the physical layout of the filesystem.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
| -rw-r--r-- | libxfs/xfs_fs.h | 13 | ||||
| -rw-r--r-- | libxfs/xfs_rmap.c | 28 | ||||
| -rw-r--r-- | libxfs/xfs_rmap.h | 2 |
3 files changed, 43 insertions, 0 deletions
diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h index 11fe42a828..1831cff4af 100644 --- a/libxfs/xfs_fs.h +++ b/libxfs/xfs_fs.h @@ -113,6 +113,18 @@ struct getbmapx { #define BMV_OF_LAST 0x4 /* segment is the last in the file */ #define BMV_OF_SHARED 0x8 /* segment shared with another file */ +/* fmr_owner special values for FS_IOC_GETFSMAP */ +#define XFS_FMR_OWN_FREE FMR_OWN_FREE /* free space */ +#define XFS_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ +#define XFS_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ +#define XFS_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ +#define XFS_FMR_OWN_AG FMR_OWNER('X', 3) /* per-AG metadata */ +#define XFS_FMR_OWN_INOBT FMR_OWNER('X', 4) /* inode btree blocks */ +#define XFS_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ +#define XFS_FMR_OWN_REFC FMR_OWNER('X', 6) /* refcount tree */ +#define XFS_FMR_OWN_COW FMR_OWNER('X', 7) /* cow staging */ +#define XFS_FMR_OWN_DEFECTIVE FMR_OWNER('X', 8) /* bad blocks */ + /* * Structure for XFS_IOC_FSSETDM. * For use by backup and restore programs to set the XFS on-disk inode @@ -522,6 +534,7 @@ typedef struct xfs_swapext #define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap) #define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64) #define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_fs_eofblocks) +/* XFS_IOC_GETFSMAP ------ hoisted 59 */ /* * ioctl commands that replace IRIX syssgi()'s diff --git a/libxfs/xfs_rmap.c b/libxfs/xfs_rmap.c index 7738f50a0f..f78771d19b 100644 --- a/libxfs/xfs_rmap.c +++ b/libxfs/xfs_rmap.c @@ -2303,3 +2303,31 @@ xfs_rmap_free_extent( return __xfs_rmap_add(mp, dfops, XFS_RMAP_FREE, owner, XFS_DATA_FORK, &bmap); } + +/* Compare rmap records. Returns -1 if a < b, 1 if a > b, and 0 if equal. */ +int +xfs_rmap_compare( + const struct xfs_rmap_irec *a, + const struct xfs_rmap_irec *b) +{ + __u64 oa; + __u64 ob; + + oa = xfs_rmap_irec_offset_pack(a); + ob = xfs_rmap_irec_offset_pack(b); + + if (a->rm_startblock < b->rm_startblock) + return -1; + else if (a->rm_startblock > b->rm_startblock) + return 1; + else if (a->rm_owner < b->rm_owner) + return -1; + else if (a->rm_owner > b->rm_owner) + return 1; + else if (oa < ob) + return -1; + else if (oa > ob) + return 1; + else + return 0; +} diff --git a/libxfs/xfs_rmap.h b/libxfs/xfs_rmap.h index faf2c1a2e6..98f908fea1 100644 --- a/libxfs/xfs_rmap.h +++ b/libxfs/xfs_rmap.h @@ -214,5 +214,7 @@ int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno, int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno, uint64_t owner, uint64_t offset, unsigned int flags, struct xfs_rmap_irec *irec, int *stat); +int xfs_rmap_compare(const struct xfs_rmap_irec *a, + const struct xfs_rmap_irec *b); #endif /* __XFS_RMAP_H__ */ |