From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:47810 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754881AbcFQBXt (ORCPT ); Thu, 16 Jun 2016 21:23:49 -0400 Subject: [PATCH 054/119] xfs: introduce refcount btree definitions From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-fsdevel@vger.kernel.org, vishal.l.verma@intel.com, Christoph Hellwig , xfs@oss.sgi.com Date: Thu, 16 Jun 2016 18:23:37 -0700 Message-ID: <146612661755.12839.13699464885618790847.stgit@birch.djwong.org> In-Reply-To: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> References: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Add new per-AG refcount btree definitions to the per-AG structures. v2: Move the reflink inode flag out of the way of the DAX flag, and add the new cowextsize flag. v3: Don't allow pNFS to export reflinked files; this will be removed some day when the Linux pNFS server supports it. [hch: don't allow pNFS export of reflinked files] [darrick: fix the feature test in hch's patch] Signed-off-by: Darrick J. Wong Signed-off-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_alloc.c | 5 +++++ fs/xfs/libxfs/xfs_btree.c | 5 +++-- fs/xfs/libxfs/xfs_btree.h | 3 +++ fs/xfs/libxfs/xfs_format.h | 29 ++++++++++++++++++++++++++--- fs/xfs/libxfs/xfs_rmap_btree.c | 7 +++++-- fs/xfs/libxfs/xfs_types.h | 2 +- fs/xfs/xfs_inode.h | 5 +++++ fs/xfs/xfs_mount.h | 3 +++ fs/xfs/xfs_pnfs.c | 7 +++++++ 9 files changed, 58 insertions(+), 8 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 5f05c4e..9009b1f 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2448,6 +2448,10 @@ 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;; } @@ -2568,6 +2572,7 @@ 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; #ifdef __KERNEL__ diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 50b2c32..1593239 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 6fa13a9..9b5a921 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -66,6 +66,7 @@ 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. @@ -99,6 +100,7 @@ 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: break; \ case XFS_BTNUM_MAX: ASSERT(0); __mp = __mp /* fucking gcc */ ; break; \ } \ } while (0) @@ -121,6 +123,7 @@ 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: break; \ case XFS_BTNUM_MAX: ASSERT(0); __mp = __mp /* fucking gcc */ ; break; \ } \ } while (0) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 1b08237..63a97a9 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 */ @@ -640,12 +647,15 @@ typedef struct xfs_agf { __be32 agf_btreeblks; /* # of blocks held in AGF btrees */ uuid_t agf_uuid; /* uuid of filesystem */ + __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[16]; + __be64 agf_spare64[15]; /* unlogged fields, written during buffer writeback. */ __be64 agf_lsn; /* last write sequence */ @@ -1033,9 +1043,14 @@ 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: @@ -1382,7 +1397,8 @@ xfs_rmap_ino_owner( #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))) @@ -1530,6 +1546,13 @@ xfs_owner_info_pack( } /* + * Reference Count Btree format definitions + * + */ +#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */ + + +/* * BMAP Btree format definitions * * This includes both the root block definition that sits inside an inode fork diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c index 9adb930..090dbbe 100644 --- a/fs/xfs/libxfs/xfs_rmap_btree.c +++ b/fs/xfs/libxfs/xfs_rmap_btree.c @@ -475,6 +475,9 @@ 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); + 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 da87796..690d616 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -112,7 +112,7 @@ 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 633f2af..d0ea6ff 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 e18d74e..823ee63 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -391,6 +391,9 @@ 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 d5b7566..b21f532 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -139,6 +139,13 @@ xfs_fs_map_blocks( 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 * similar to direct I/O, except that the synchronization is much more From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id 110867DD4 for ; Thu, 16 Jun 2016 20:23:49 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay1.corp.sgi.com (Postfix) with ESMTP id D47AB8F804B for ; Thu, 16 Jun 2016 18:23:48 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com [141.146.126.69]) by cuda.sgi.com with ESMTP id 2XfKrGDVI5GAKErS (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 16 Jun 2016 18:23:46 -0700 (PDT) Subject: [PATCH 054/119] xfs: introduce refcount btree definitions From: "Darrick J. Wong" Date: Thu, 16 Jun 2016 18:23:37 -0700 Message-ID: <146612661755.12839.13699464885618790847.stgit@birch.djwong.org> In-Reply-To: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> References: <146612627129.12839.3827886950949809165.stgit@birch.djwong.org> MIME-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-fsdevel@vger.kernel.org, vishal.l.verma@intel.com, Christoph Hellwig , xfs@oss.sgi.com Add new per-AG refcount btree definitions to the per-AG structures. v2: Move the reflink inode flag out of the way of the DAX flag, and add the new cowextsize flag. v3: Don't allow pNFS to export reflinked files; this will be removed some day when the Linux pNFS server supports it. [hch: don't allow pNFS export of reflinked files] [darrick: fix the feature test in hch's patch] Signed-off-by: Darrick J. Wong Signed-off-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_alloc.c | 5 +++++ fs/xfs/libxfs/xfs_btree.c | 5 +++-- fs/xfs/libxfs/xfs_btree.h | 3 +++ fs/xfs/libxfs/xfs_format.h | 29 ++++++++++++++++++++++++++--- fs/xfs/libxfs/xfs_rmap_btree.c | 7 +++++-- fs/xfs/libxfs/xfs_types.h | 2 +- fs/xfs/xfs_inode.h | 5 +++++ fs/xfs/xfs_mount.h | 3 +++ fs/xfs/xfs_pnfs.c | 7 +++++++ 9 files changed, 58 insertions(+), 8 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 5f05c4e..9009b1f 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -2448,6 +2448,10 @@ 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;; } @@ -2568,6 +2572,7 @@ 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; #ifdef __KERNEL__ diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 50b2c32..1593239 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 6fa13a9..9b5a921 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/libxfs/xfs_btree.h @@ -66,6 +66,7 @@ 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. @@ -99,6 +100,7 @@ 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: break; \ case XFS_BTNUM_MAX: ASSERT(0); __mp = __mp /* fucking gcc */ ; break; \ } \ } while (0) @@ -121,6 +123,7 @@ 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: break; \ case XFS_BTNUM_MAX: ASSERT(0); __mp = __mp /* fucking gcc */ ; break; \ } \ } while (0) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 1b08237..63a97a9 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 */ @@ -640,12 +647,15 @@ typedef struct xfs_agf { __be32 agf_btreeblks; /* # of blocks held in AGF btrees */ uuid_t agf_uuid; /* uuid of filesystem */ + __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[16]; + __be64 agf_spare64[15]; /* unlogged fields, written during buffer writeback. */ __be64 agf_lsn; /* last write sequence */ @@ -1033,9 +1043,14 @@ 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: @@ -1382,7 +1397,8 @@ xfs_rmap_ino_owner( #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))) @@ -1530,6 +1546,13 @@ xfs_owner_info_pack( } /* + * Reference Count Btree format definitions + * + */ +#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */ + + +/* * BMAP Btree format definitions * * This includes both the root block definition that sits inside an inode fork diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c index 9adb930..090dbbe 100644 --- a/fs/xfs/libxfs/xfs_rmap_btree.c +++ b/fs/xfs/libxfs/xfs_rmap_btree.c @@ -475,6 +475,9 @@ 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); + 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 da87796..690d616 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -112,7 +112,7 @@ 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 633f2af..d0ea6ff 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 e18d74e..823ee63 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -391,6 +391,9 @@ 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 d5b7566..b21f532 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -139,6 +139,13 @@ xfs_fs_map_blocks( 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 * similar to direct I/O, except that the synchronization is much more _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs