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Wong" Add a new inode flag to require that all file data extent mappings must be aligned (both the file offset range and the allocated space itself) to the extent size hint. Having a separate COW extent size hint is no longer allowed. The goal here is to enable sysadmins and users to mandate that all space mappings in a file must have a startoff/blockcount that are aligned to (say) a 2MB alignment and that the startblock/blockcount will follow the same alignment. Signed-off-by: "Darrick J. Wong" Co-developed-by: John Garry Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_format.h | 6 +++- fs/xfs/libxfs/xfs_inode_buf.c | 53 +++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_inode_buf.h | 3 ++ fs/xfs/libxfs/xfs_sb.c | 2 ++ fs/xfs/xfs_inode.c | 13 +++++++++ fs/xfs/xfs_inode.h | 20 ++++++++++++- fs/xfs/xfs_ioctl.c | 47 +++++++++++++++++++++++++++++-- fs/xfs/xfs_mount.h | 2 ++ fs/xfs/xfs_reflink.h | 10 ------- fs/xfs/xfs_super.c | 4 +++ include/uapi/linux/fs.h | 2 ++ 11 files changed, 148 insertions(+), 14 deletions(-) diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 61f51becff4f..b48cd75d34a6 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -353,6 +353,7 @@ xfs_sb_has_compat_feature( #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_INOBTCNT (1 << 3) /* inobt block counts */ +#define XFS_SB_FEAT_RO_COMPAT_FORCEALIGN (1 << 30) /* aligned file data extents */ #define XFS_SB_FEAT_RO_COMPAT_ALL \ (XFS_SB_FEAT_RO_COMPAT_FINOBT | \ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \ @@ -1094,16 +1095,19 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */ #define XFS_DIFLAG2_BIGTIME_BIT 3 /* big timestamps */ #define XFS_DIFLAG2_NREXT64_BIT 4 /* large extent counters */ +/* data extent mappings for regular files must be aligned to extent size hint */ +#define XFS_DIFLAG2_FORCEALIGN_BIT 5 #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) #define XFS_DIFLAG2_NREXT64 (1 << XFS_DIFLAG2_NREXT64_BIT) +#define XFS_DIFLAG2_FORCEALIGN (1 << XFS_DIFLAG2_FORCEALIGN_BIT) #define XFS_DIFLAG2_ANY \ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ - XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64) + XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_FORCEALIGN) static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip) { diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index e7a7bfbe75b4..b2c5f466c1a9 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -644,6 +644,15 @@ xfs_dinode_verify( !xfs_has_bigtime(mp)) return __this_address; + if (flags2 & XFS_DIFLAG2_FORCEALIGN) { + fa = xfs_inode_validate_forcealign(mp, + be32_to_cpu(dip->di_extsize), + be32_to_cpu(dip->di_cowextsize), + mode, flags, flags2); + if (fa) + return fa; + } + return NULL; } @@ -811,3 +820,47 @@ xfs_inode_validate_cowextsize( return NULL; } + +/* Validate the forcealign inode flag */ +xfs_failaddr_t +xfs_inode_validate_forcealign( + struct xfs_mount *mp, + uint32_t extsize, + uint32_t cowextsize, + uint16_t mode, + uint16_t flags, + uint64_t flags2) +{ + /* superblock rocompat feature flag */ + if (!xfs_has_forcealign(mp)) + return __this_address; + + /* Only regular files and directories */ + if (!S_ISDIR(mode) && !S_ISREG(mode)) + return __this_address; + + /* We require EXTSIZE or EXTSZINHERIT */ + if (!(flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))) + return __this_address; + + /* We require a non-zero extsize */ + if (!extsize) + return __this_address; + + /* Reflink'ed disallowed */ + if (flags2 & XFS_DIFLAG2_REFLINK) + return __this_address; + + /* COW extsize disallowed */ + if (flags2 & XFS_DIFLAG2_COWEXTSIZE) + return __this_address; + + if (cowextsize) + return __this_address; + + /* A RT device with sb_rextsize=1 could make use of forcealign */ + if (flags & XFS_DIFLAG_REALTIME && mp->m_sb.sb_rextsize != 1) + return __this_address; + + return NULL; +} diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h index 585ed5a110af..b8b65287b037 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.h +++ b/fs/xfs/libxfs/xfs_inode_buf.h @@ -33,6 +33,9 @@ xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp, xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp, uint32_t cowextsize, uint16_t mode, uint16_t flags, uint64_t flags2); +xfs_failaddr_t xfs_inode_validate_forcealign(struct xfs_mount *mp, + uint32_t extsize, uint32_t cowextsize, uint16_t mode, + uint16_t flags, uint64_t flags2); static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv) { diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index 09e4bf949bf8..515f5dd23b6d 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -164,6 +164,8 @@ xfs_sb_version_to_features( features |= XFS_FEAT_REFLINK; if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) features |= XFS_FEAT_INOBTCNT; + if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FORCEALIGN) + features |= XFS_FEAT_FORCEALIGN; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) features |= XFS_FEAT_FTYPE; if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 93ad442f399b..a6cd5f1f2680 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -608,6 +608,8 @@ xfs_ip2xflags( flags |= FS_XFLAG_DAX; if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) flags |= FS_XFLAG_COWEXTSIZE; + if (ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) + flags |= FS_XFLAG_FORCEALIGN; } if (xfs_inode_has_attr_fork(ip)) @@ -737,6 +739,8 @@ xfs_inode_inherit_flags2( } if (pip->i_diflags2 & XFS_DIFLAG2_DAX) ip->i_diflags2 |= XFS_DIFLAG2_DAX; + if (pip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) + ip->i_diflags2 |= XFS_DIFLAG2_FORCEALIGN; /* Don't let invalid cowextsize hints propagate. */ failaddr = xfs_inode_validate_cowextsize(ip->i_mount, ip->i_cowextsize, @@ -745,6 +749,15 @@ xfs_inode_inherit_flags2( ip->i_diflags2 &= ~XFS_DIFLAG2_COWEXTSIZE; ip->i_cowextsize = 0; } + + if (ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN) { + failaddr = xfs_inode_validate_forcealign(ip->i_mount, + ip->i_extsize, ip->i_cowextsize, + VFS_I(ip)->i_mode, ip->i_diflags, + ip->i_diflags2); + if (failaddr) + ip->i_diflags2 &= ~XFS_DIFLAG2_FORCEALIGN; + } } /* diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 805a8cf522c6..7005ea29bf11 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -301,6 +301,16 @@ static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip) return ip->i_cowfp && ip->i_cowfp->if_bytes; } +static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip) +{ + return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount); +} + +static inline bool xfs_is_cow_inode(struct xfs_inode *ip) +{ + return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); +} + static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip) { return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME; @@ -313,7 +323,15 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip) static inline bool xfs_inode_has_forcealign(struct xfs_inode *ip) { - return false; + if (!(ip->i_diflags & XFS_DIFLAG_EXTSIZE)) + return false; + if (ip->i_extsize <= 1) + return false; + if (xfs_is_cow_inode(ip)) + return false; + if (ip->i_diflags & XFS_DIFLAG_REALTIME) + return false; + return ip->i_diflags2 & XFS_DIFLAG2_FORCEALIGN; } /* diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index f0117188f302..5eff8fd9fa3e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -525,10 +525,48 @@ xfs_flags2diflags2( di_flags2 |= XFS_DIFLAG2_DAX; if (xflags & FS_XFLAG_COWEXTSIZE) di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; + if (xflags & FS_XFLAG_FORCEALIGN) + di_flags2 |= XFS_DIFLAG2_FORCEALIGN; return di_flags2; } +/* + * Forcealign requires a non-zero extent size hint and a zero cow + * extent size hint. Don't allow set for RT files yet. + */ +static int +xfs_ioctl_setattr_forcealign( + struct xfs_inode *ip, + struct fileattr *fa) +{ + struct xfs_mount *mp = ip->i_mount; + + if (!xfs_has_forcealign(mp)) + return -EINVAL; + + if (xfs_is_reflink_inode(ip)) + return -EINVAL; + + if (!(fa->fsx_xflags & (FS_XFLAG_EXTSIZE | + FS_XFLAG_EXTSZINHERIT))) + return -EINVAL; + + if (fa->fsx_xflags & FS_XFLAG_COWEXTSIZE) + return -EINVAL; + + if (!fa->fsx_extsize) + return -EINVAL; + + if (fa->fsx_cowextsize) + return -EINVAL; + + if (fa->fsx_xflags & FS_XFLAG_REALTIME) + return -EINVAL; + + return 0; +} + static int xfs_ioctl_setattr_xflags( struct xfs_trans *tp, @@ -537,10 +575,12 @@ xfs_ioctl_setattr_xflags( { struct xfs_mount *mp = ip->i_mount; bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME); + bool forcealign = fa->fsx_xflags & FS_XFLAG_FORCEALIGN; uint64_t i_flags2; - if (rtflag != XFS_IS_REALTIME_INODE(ip)) { - /* Can't change realtime flag if any extents are allocated. */ + /* Can't change RT or forcealign flags if any extents are allocated. */ + if (rtflag != XFS_IS_REALTIME_INODE(ip) || + forcealign != xfs_inode_has_forcealign(ip)) { if (ip->i_df.if_nextents || ip->i_delayed_blks) return -EINVAL; } @@ -561,6 +601,9 @@ xfs_ioctl_setattr_xflags( if (i_flags2 && !xfs_has_v3inodes(mp)) return -EINVAL; + if (forcealign && (xfs_ioctl_setattr_forcealign(ip, fa) < 0)) + return -EINVAL; + ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); ip->i_diflags2 = i_flags2; diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index d0567dfbc036..30228fea908d 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -299,6 +299,7 @@ typedef struct xfs_mount { #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */ #define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */ #define XFS_FEAT_EXCHANGE_RANGE (1ULL << 27) /* exchange range */ +#define XFS_FEAT_FORCEALIGN (1ULL << 28) /* aligned file data extents */ /* Mount features */ #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */ @@ -385,6 +386,7 @@ __XFS_ADD_V4_FEAT(projid32, PROJID32) __XFS_HAS_V4_FEAT(v3inodes, V3INODES) __XFS_HAS_V4_FEAT(crc, CRC) __XFS_HAS_V4_FEAT(pquotino, PQUOTINO) +__XFS_HAS_FEAT(forcealign, FORCEALIGN) /* * Mount features diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index 65c5dfe17ecf..fb55e4ce49fa 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -6,16 +6,6 @@ #ifndef __XFS_REFLINK_H #define __XFS_REFLINK_H 1 -static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip) -{ - return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount); -} - -static inline bool xfs_is_cow_inode(struct xfs_inode *ip) -{ - return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); -} - extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip, struct xfs_bmbt_irec *irec, bool *shared); int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap, diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 27e9f749c4c7..852bbfb21506 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1721,6 +1721,10 @@ xfs_fs_fill_super( mp->m_features &= ~XFS_FEAT_DISCARD; } + if (xfs_has_forcealign(mp)) + xfs_warn(mp, +"EXPERIMENTAL forced data extent alignment feature in use. Use at your own risk!"); + if (xfs_has_reflink(mp)) { if (mp->m_sb.sb_rblocks) { xfs_alert(mp, diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 191a7e88a8ab..6a6bcb53594a 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -158,6 +158,8 @@ struct fsxattr { #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ +/* data extent mappings for regular files must be aligned to extent size hint */ +#define FS_XFLAG_FORCEALIGN 0x00020000 #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is