diff options
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 8 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.c | 108 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.h | 1 | ||||
| -rw-r--r-- | fs/xfs/xfs_sb.h | 100 |
4 files changed, 172 insertions, 45 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 86285071700b..5303b3db3c98 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2040,6 +2040,14 @@ xlog_recovery_validate_buf_type( } bp->b_ops = &xfs_attr3_rmt_buf_ops; break; + case XFS_BLFT_SB_BUF: + if (magic32 != XFS_SB_MAGIC) { + xfs_warn(mp, "Bad SB block magic!"); + ASSERT(0); + break; + } + bp->b_ops = &xfs_sb_buf_ops; + break; default: xfs_warn(mp, "Unknown buffer type %d!", xfs_blft_from_flags(buf_f)); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 3806088a8f77..140136cf2dc0 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -43,6 +43,8 @@ #include "xfs_utils.h" #include "xfs_trace.h" #include "xfs_icache.h" +#include "xfs_cksum.h" +#include "xfs_buf_item.h" #ifdef HAVE_PERCPU_SB @@ -109,6 +111,12 @@ static const struct { { offsetof(xfs_sb_t, sb_logsunit), 0 }, { offsetof(xfs_sb_t, sb_features2), 0 }, { offsetof(xfs_sb_t, sb_bad_features2), 0 }, + { offsetof(xfs_sb_t, sb_features_compat), 0 }, + { offsetof(xfs_sb_t, sb_features_ro_compat), 0 }, + { offsetof(xfs_sb_t, sb_features_incompat), 0 }, + { offsetof(xfs_sb_t, sb_crc), 0 }, + { offsetof(xfs_sb_t, sb_pquotino), 0 }, + { offsetof(xfs_sb_t, sb_lsn), 0 }, { sizeof(xfs_sb_t), 0 } }; @@ -319,11 +327,23 @@ xfs_mount_validate_sb( return XFS_ERROR(EWRONGFS); } + if (!xfs_sb_good_version(sbp)) { xfs_warn(mp, "bad version"); return XFS_ERROR(EWRONGFS); } + /* + * Do not allow Version 5 superblocks to mount right now, even though + * support is in place. We need to implement the proper feature masks + * first. + */ + if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { + xfs_alert(mp, + "Version 5 superblock detected. Experimental support not yet enabled!"); + return XFS_ERROR(EINVAL); + } + if (unlikely( sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { xfs_warn(mp, @@ -557,6 +577,11 @@ xfs_sb_from_disk( to->sb_logsunit = be32_to_cpu(from->sb_logsunit); to->sb_features2 = be32_to_cpu(from->sb_features2); to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); + to->sb_features_compat = be32_to_cpu(from->sb_features_compat); + to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); + to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); + to->sb_pquotino = be64_to_cpu(from->sb_pquotino); + to->sb_lsn = be64_to_cpu(from->sb_lsn); } /* @@ -612,13 +637,12 @@ xfs_sb_to_disk( } } -static void +static int xfs_sb_verify( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_target->bt_mount; struct xfs_sb sb; - int error; xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); @@ -626,16 +650,46 @@ xfs_sb_verify( * Only check the in progress field for the primary superblock as * mkfs.xfs doesn't clear it from secondary superblocks. */ - error = xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR); - if (error) - xfs_buf_ioerror(bp, error); + return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR); } +/* + * If the superblock has the CRC feature bit set or the CRC field is non-null, + * check that the CRC is valid. We check the CRC field is non-null because a + * single bit error could clear the feature bit and unused parts of the + * superblock are supposed to be zero. Hence a non-null crc field indicates that + * we've potentially lost a feature bit and we should check it anyway. + */ static void xfs_sb_read_verify( struct xfs_buf *bp) { - xfs_sb_verify(bp); + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); + int error; + + /* + * open code the version check to avoid needing to convert the entire + * superblock from disk order just to check the version number + */ + if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && + (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == + XFS_SB_VERSION_5) || + dsb->sb_crc != 0)) { + + if (!xfs_verify_cksum(bp->b_addr, be16_to_cpu(dsb->sb_sectsize), + offsetof(struct xfs_sb, sb_crc))) { + error = EFSCORRUPTED; + goto out_error; + } + } + error = xfs_sb_verify(bp); + +out_error: + if (error) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); + xfs_buf_ioerror(bp, error); + } } /* @@ -648,11 +702,10 @@ static void xfs_sb_quiet_read_verify( struct xfs_buf *bp) { - struct xfs_sb sb; + struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); - xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); - if (sb.sb_magicnum == XFS_SB_MAGIC) { + if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { /* XFS filesystem, verify noisily! */ xfs_sb_read_verify(bp); return; @@ -663,9 +716,27 @@ xfs_sb_quiet_read_verify( static void xfs_sb_write_verify( - struct xfs_buf *bp) + struct xfs_buf *bp) { - xfs_sb_verify(bp); + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_buf_log_item *bip = bp->b_fspriv; + int error; + + error = xfs_sb_verify(bp); + if (error) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); + xfs_buf_ioerror(bp, error); + return; + } + + if (!xfs_sb_version_hascrc(&mp->m_sb)) + return; + + if (bip) + XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); + + xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), + offsetof(struct xfs_sb, sb_crc)); } const struct xfs_buf_ops xfs_sb_buf_ops = { @@ -687,7 +758,8 @@ int xfs_readsb(xfs_mount_t *mp, int flags) { unsigned int sector_size; - xfs_buf_t *bp; + struct xfs_buf *bp; + struct xfs_sb *sbp = &mp->m_sb; int error; int loud = !(flags & XFS_MFSI_QUIET); @@ -726,10 +798,10 @@ reread: /* * We must be able to do sector-sized and sector-aligned IO. */ - if (sector_size > mp->m_sb.sb_sectsize) { + if (sector_size > sbp->sb_sectsize) { if (loud) xfs_warn(mp, "device supports %u byte sectors (not %u)", - sector_size, mp->m_sb.sb_sectsize); + sector_size, sbp->sb_sectsize); error = ENOSYS; goto release_buf; } @@ -738,15 +810,18 @@ reread: * If device sector size is smaller than the superblock size, * re-read the superblock so the buffer is correctly sized. */ - if (sector_size < mp->m_sb.sb_sectsize) { + if (sector_size < sbp->sb_sectsize) { xfs_buf_relse(bp); - sector_size = mp->m_sb.sb_sectsize; + sector_size = sbp->sb_sectsize; goto reread; } /* Initialize per-cpu counters */ xfs_icsb_reinit_counters(mp); + /* no need to be quiet anymore, so reset the buf ops */ + bp->b_ops = &xfs_sb_buf_ops; + mp->m_sb_bp = bp; xfs_buf_unlock(bp); return 0; @@ -1633,6 +1708,7 @@ xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) ASSERT((1LL << f) & XFS_SB_MOD_BITS); first = xfs_sb_info[f].offset; + xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); xfs_trans_log_buf(tp, bp, first, last); } diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 687c1711b6eb..b004cecdfb04 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -391,6 +391,7 @@ extern void xfs_set_low_space_thresholds(struct xfs_mount *); #endif /* __KERNEL__ */ +extern void xfs_sb_calc_crc(struct xfs_buf *); extern void xfs_mod_sb(struct xfs_trans *, __int64_t); extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, xfs_agnumber_t *); diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h index a05b45175fb0..457fefae5683 100644 --- a/fs/xfs/xfs_sb.h +++ b/fs/xfs/xfs_sb.h @@ -32,6 +32,7 @@ struct xfs_mount; #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ +#define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */ #define XFS_SB_VERSION_NUMBITS 0x000f #define XFS_SB_VERSION_ALLFBITS 0xfff0 #define XFS_SB_VERSION_SASHFBITS 0xf000 @@ -161,6 +162,18 @@ typedef struct xfs_sb { */ __uint32_t sb_bad_features2; + /* version 5 superblock fields start here */ + + /* feature masks */ + __uint32_t sb_features_compat; + __uint32_t sb_features_ro_compat; + __uint32_t sb_features_incompat; + + __uint32_t sb_crc; /* superblock crc */ + + xfs_ino_t sb_pquotino; /* project quota inode */ + xfs_lsn_t sb_lsn; /* last write sequence */ + /* must be padded to 64 bit alignment */ } xfs_sb_t; @@ -229,7 +242,19 @@ typedef struct xfs_dsb { * for features2 bits. Easiest just to mark it bad and not use * it for anything else. */ - __be32 sb_bad_features2; + __be32 sb_bad_features2; + + /* version 5 superblock fields start here */ + + /* feature masks */ + __be32 sb_features_compat; + __be32 sb_features_ro_compat; + __be32 sb_features_incompat; + + __le32 sb_crc; /* superblock crc */ + + __be64 sb_pquotino; /* project quota inode */ + __be64 sb_lsn; /* last write sequence */ /* must be padded to 64 bit alignment */ } xfs_dsb_t; @@ -250,7 +275,9 @@ typedef enum { XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, - XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, + XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT, + XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, XFS_SBS_CRC, + XFS_SBS_PQUOTINO, XFS_SBS_LSN, XFS_SBS_FIELDCOUNT } xfs_sb_field_t; @@ -276,6 +303,11 @@ typedef enum { #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) +#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT) +#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT) +#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT) +#define XFS_SB_CRC XFS_SB_MVAL(CRC) +#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO) #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) #define XFS_SB_MOD_BITS \ @@ -283,7 +315,8 @@ typedef enum { XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ - XFS_SB_BAD_FEATURES2) + XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \ + XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | XFS_SB_PQUOTINO) /* @@ -325,6 +358,8 @@ static inline int xfs_sb_good_version(xfs_sb_t *sbp) return 1; } + if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) + return 1; return 0; } @@ -365,7 +400,7 @@ static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp) { return sbp->sb_versionnum == XFS_SB_VERSION_2 || sbp->sb_versionnum == XFS_SB_VERSION_3 || - (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)); } @@ -373,7 +408,7 @@ static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) { if (sbp->sb_versionnum == XFS_SB_VERSION_1) sbp->sb_versionnum = XFS_SB_VERSION_2; - else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) + else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; else sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; @@ -382,7 +417,7 @@ static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp) { return sbp->sb_versionnum == XFS_SB_VERSION_3 || - (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)); } @@ -396,13 +431,13 @@ static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp) static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); } static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) { - if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) + if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; else sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) | @@ -411,13 +446,14 @@ static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && - (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); } static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); } @@ -429,38 +465,42 @@ static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp) static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && - (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)); } static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && - (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT)); } static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && - (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)); } static inline int xfs_sb_version_hassector(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); } static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); } static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) { - return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && - (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT)); } /* @@ -475,14 +515,16 @@ static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp) { - return xfs_sb_version_hasmorebits(sbp) && - (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); } static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) { - return xfs_sb_version_hasmorebits(sbp) && - (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); } static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp) @@ -500,14 +542,14 @@ static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp) static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) { - return xfs_sb_version_hasmorebits(sbp) && - (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT); + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || + (xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); } static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp) { - return (xfs_sb_version_hasmorebits(sbp) && - (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT)); + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; } /* |