From: Darrick J. Wong Date: Mon, 3 Oct 2016 16:11:16 +0000 (-0700) Subject: xfs: introduce refcount btree definitions X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=46eeb521b95247170d2db773bb4cc8fb3de1d85c;p=openwrt%2Fstaging%2Fblogic.git xfs: introduce refcount btree definitions Add new per-AG refcount btree definitions to the per-AG structures. Signed-off-by: Darrick J. Wong Signed-off-by: Christoph Hellwig Reviewed-by: Christoph Hellwig --- diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index ca75dc90ebe0..275d3459e9e8 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2458,6 +2458,10 @@ xfs_agf_verify( be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length)) return false; + if (xfs_sb_version_hasreflink(&mp->m_sb) && + be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS) + return false; + return true;; } @@ -2578,6 +2582,7 @@ xfs_alloc_read_agf( be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]); pag->pagf_levels[XFS_BTNUM_RMAPi] = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAPi]); + pag->pagf_refcount_level = be32_to_cpu(agf->agf_refcount_level); spin_lock_init(&pag->pagb_lock); pag->pagb_count = 0; pag->pagb_tree = RB_ROOT; diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index aa1752f918b8..f8bab9b22755 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -45,9 +45,10 @@ kmem_zone_t *xfs_btree_cur_zone; */ static const __uint32_t xfs_magics[2][XFS_BTNUM_MAX] = { { XFS_ABTB_MAGIC, XFS_ABTC_MAGIC, 0, XFS_BMAP_MAGIC, XFS_IBT_MAGIC, - XFS_FIBT_MAGIC }, + XFS_FIBT_MAGIC, 0 }, { XFS_ABTB_CRC_MAGIC, XFS_ABTC_CRC_MAGIC, XFS_RMAP_CRC_MAGIC, - XFS_BMAP_CRC_MAGIC, XFS_IBT_CRC_MAGIC, XFS_FIBT_CRC_MAGIC } + XFS_BMAP_CRC_MAGIC, XFS_IBT_CRC_MAGIC, XFS_FIBT_CRC_MAGIC, + XFS_REFC_CRC_MAGIC } }; #define xfs_btree_magic(cur) \ xfs_magics[!!((cur)->bc_flags & XFS_BTREE_CRC_BLOCKS)][cur->bc_btnum] diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h index 3f8556a5c2ad..e7ef1d9dbe6e 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -72,6 +72,7 @@ union xfs_btree_rec { #define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi) #define XFS_BTNUM_FINO ((xfs_btnum_t)XFS_BTNUM_FINOi) #define XFS_BTNUM_RMAP ((xfs_btnum_t)XFS_BTNUM_RMAPi) +#define XFS_BTNUM_REFC ((xfs_btnum_t)XFS_BTNUM_REFCi) /* * For logging record fields. @@ -105,6 +106,7 @@ do { \ case XFS_BTNUM_INO: __XFS_BTREE_STATS_INC(__mp, ibt, stat); break; \ case XFS_BTNUM_FINO: __XFS_BTREE_STATS_INC(__mp, fibt, stat); break; \ case XFS_BTNUM_RMAP: __XFS_BTREE_STATS_INC(__mp, rmap, stat); break; \ + case XFS_BTNUM_REFC: __XFS_BTREE_STATS_INC(__mp, refcbt, stat); break; \ case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break; \ } \ } while (0) @@ -127,6 +129,8 @@ do { \ __XFS_BTREE_STATS_ADD(__mp, fibt, stat, val); break; \ case XFS_BTNUM_RMAP: \ __XFS_BTREE_STATS_ADD(__mp, rmap, stat, val); break; \ + case XFS_BTNUM_REFC: \ + __XFS_BTREE_STATS_ADD(__mp, refcbt, stat, val); break; \ case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break; \ } \ } while (0) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 270fb5cf4fa1..57c52a6c7bb8 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -456,6 +456,7 @@ xfs_sb_has_compat_feature( #define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */ #define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1) /* reverse map btree */ +#define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */ #define XFS_SB_FEAT_RO_COMPAT_ALL \ (XFS_SB_FEAT_RO_COMPAT_FINOBT | \ XFS_SB_FEAT_RO_COMPAT_RMAPBT) @@ -546,6 +547,12 @@ static inline bool xfs_sb_version_hasrmapbt(struct xfs_sb *sbp) (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT); } +static inline bool xfs_sb_version_hasreflink(struct xfs_sb *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && + (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK); +} + /* * end of superblock version macros */ @@ -641,14 +648,17 @@ typedef struct xfs_agf { uuid_t agf_uuid; /* uuid of filesystem */ __be32 agf_rmap_blocks; /* rmapbt blocks used */ - __be32 agf_padding; /* padding */ + __be32 agf_refcount_blocks; /* refcountbt blocks used */ + + __be32 agf_refcount_root; /* refcount tree root block */ + __be32 agf_refcount_level; /* refcount btree levels */ /* * reserve some contiguous space for future logged fields before we add * the unlogged fields. This makes the range logging via flags and * structure offsets much simpler. */ - __be64 agf_spare64[15]; + __be64 agf_spare64[14]; /* unlogged fields, written during buffer writeback. */ __be64 agf_lsn; /* last write sequence */ @@ -1041,9 +1051,14 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) * 16 bits of the XFS_XFLAG_s range. */ #define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */ +#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_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_ANY (XFS_DIFLAG2_DAX) +#define XFS_DIFLAG2_ANY \ + (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE) /* * Inode number format: @@ -1353,7 +1368,8 @@ struct xfs_owner_info { #define XFS_RMAP_OWN_AG (-5ULL) /* AG freespace btree blocks */ #define XFS_RMAP_OWN_INOBT (-6ULL) /* Inode btree blocks */ #define XFS_RMAP_OWN_INODES (-7ULL) /* Inode chunk */ -#define XFS_RMAP_OWN_MIN (-8ULL) /* guard */ +#define XFS_RMAP_OWN_REFC (-8ULL) /* refcount tree */ +#define XFS_RMAP_OWN_MIN (-9ULL) /* guard */ #define XFS_RMAP_NON_INODE_OWNER(owner) (!!((owner) & (1ULL << 63))) @@ -1433,6 +1449,13 @@ typedef __be32 xfs_rmap_ptr_t; XFS_FIBT_BLOCK(mp) + 1 : \ XFS_IBT_BLOCK(mp) + 1) +/* + * Reference Count Btree format definitions + * + */ +#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */ + + /* * BMAP Btree format definitions * diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c index 17b8eeb34ac8..9c0585e7db1f 100644 --- a/fs/xfs/libxfs/xfs_rmap_btree.c +++ b/fs/xfs/libxfs/xfs_rmap_btree.c @@ -512,6 +512,24 @@ void xfs_rmapbt_compute_maxlevels( struct xfs_mount *mp) { - mp->m_rmap_maxlevels = xfs_btree_compute_maxlevels(mp, - mp->m_rmap_mnr, mp->m_sb.sb_agblocks); + /* + * On a non-reflink filesystem, the maximum number of rmap + * records is the number of blocks in the AG, hence the max + * rmapbt height is log_$maxrecs($agblocks). However, with + * reflink each AG block can have up to 2^32 (per the refcount + * record format) owners, which means that theoretically we + * could face up to 2^64 rmap records. + * + * That effectively means that the max rmapbt height must be + * XFS_BTREE_MAXLEVELS. "Fortunately" we'll run out of AG + * blocks to feed the rmapbt long before the rmapbt reaches + * maximum height. The reflink code uses ag_resv_critical to + * disallow reflinking when less than 10% of the per-AG metadata + * block reservation since the fallback is a regular file copy. + */ + if (xfs_sb_version_hasreflink(&mp->m_sb)) + mp->m_rmap_maxlevels = XFS_BTREE_MAXLEVELS; + else + mp->m_rmap_maxlevels = xfs_btree_compute_maxlevels(mp, + mp->m_rmap_mnr, mp->m_sb.sb_agblocks); } diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 3d503647f26b..be7b6de5137d 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -109,7 +109,7 @@ typedef enum { typedef enum { XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_RMAPi, XFS_BTNUM_BMAPi, - XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_MAX + XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_MAX } xfs_btnum_t; struct xfs_name { diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 8f30d2533b48..a8658e68041a 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -202,6 +202,11 @@ xfs_get_initial_prid(struct xfs_inode *dp) return XFS_PROJID_DEFAULT; } +static inline bool xfs_is_reflink_inode(struct xfs_inode *ip) +{ + return ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK; +} + /* * In-core inode flags. */ diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 041d9493e798..8fab4962c4f1 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -399,6 +399,9 @@ typedef struct xfs_perag { struct xfs_ag_resv pag_meta_resv; /* Blocks reserved for just AGFL-based metadata. */ struct xfs_ag_resv pag_agfl_resv; + + /* reference count */ + __uint8_t pagf_refcount_level; } xfs_perag_t; static inline struct xfs_ag_resv * diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c index 0f14b2e4bf6c..93a7aafa56d6 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -113,6 +113,13 @@ xfs_fs_map_blocks( if (XFS_IS_REALTIME_INODE(ip)) return -ENXIO; + /* + * The pNFS block layout spec actually supports reflink like + * functionality, but the Linux pNFS server doesn't implement it yet. + */ + if (xfs_is_reflink_inode(ip)) + return -ENXIO; + /* * Lock out any other I/O before we flush and invalidate the pagecache, * and then hand out a layout to the remote system. This is very diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c index 6e812fe0fd43..12d48cd8f8a4 100644 --- a/fs/xfs/xfs_stats.c +++ b/fs/xfs/xfs_stats.c @@ -62,6 +62,7 @@ int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) { "ibt2", XFSSTAT_END_IBT_V2 }, { "fibt2", XFSSTAT_END_FIBT_V2 }, { "rmapbt", XFSSTAT_END_RMAP_V2 }, + { "refcntbt", XFSSTAT_END_REFCOUNT }, /* we print both series of quota information together */ { "qm", XFSSTAT_END_QM }, }; diff --git a/fs/xfs/xfs_stats.h b/fs/xfs/xfs_stats.h index 657865f51e78..79ad2e69fc33 100644 --- a/fs/xfs/xfs_stats.h +++ b/fs/xfs/xfs_stats.h @@ -213,7 +213,23 @@ struct xfsstats { __uint32_t xs_rmap_2_alloc; __uint32_t xs_rmap_2_free; __uint32_t xs_rmap_2_moves; -#define XFSSTAT_END_XQMSTAT (XFSSTAT_END_RMAP_V2+6) +#define XFSSTAT_END_REFCOUNT (XFSSTAT_END_RMAP_V2 + 15) + __uint32_t xs_refcbt_2_lookup; + __uint32_t xs_refcbt_2_compare; + __uint32_t xs_refcbt_2_insrec; + __uint32_t xs_refcbt_2_delrec; + __uint32_t xs_refcbt_2_newroot; + __uint32_t xs_refcbt_2_killroot; + __uint32_t xs_refcbt_2_increment; + __uint32_t xs_refcbt_2_decrement; + __uint32_t xs_refcbt_2_lshift; + __uint32_t xs_refcbt_2_rshift; + __uint32_t xs_refcbt_2_split; + __uint32_t xs_refcbt_2_join; + __uint32_t xs_refcbt_2_alloc; + __uint32_t xs_refcbt_2_free; + __uint32_t xs_refcbt_2_moves; +#define XFSSTAT_END_XQMSTAT (XFSSTAT_END_REFCOUNT + 6) __uint32_t xs_qm_dqreclaims; __uint32_t xs_qm_dqreclaim_misses; __uint32_t xs_qm_dquot_dups;