From: Darrick J. Wong <djwong@xxxxxxxxxx>
Define the ondisk format of realtime group metadata.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_format.h | 62 +++++++++++++++++++++++++++-
fs/xfs/libxfs/xfs_rtgroup.c | 96 +++++++++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_rtgroup.h | 83 +++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_sb.c | 86 +++++++++++++++++++++++++++++++++++++--
fs/xfs/libxfs/xfs_shared.h | 1
fs/xfs/xfs_ondisk.h | 1
6 files changed, 324 insertions(+), 5 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index ca87a3f8704a..a38e1499bd4b 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -216,7 +216,17 @@ struct xfs_dsb {
* pointers are no longer used.
*/
__be64 sb_rbmino;
- __be64 sb_rsumino; /* summary inode for rt bitmap */
+ /*
+ * rtgroups requires metadir, so we reuse the rsumino space to hold
+ * the rg block count and shift values.
+ */
+ union {
+ __be64 sb_rsumino; /* summary inode for rt bitmap */
+ struct {
+ __be32 sb_rgcount; /* # of realtime groups */
+ __be32 sb_rgblocks; /* rtblocks per group */
+ };
+ };
__be32 sb_rextsize; /* realtime extent size, blocks */
__be32 sb_agblocks; /* size of an allocation group */
__be32 sb_agcount; /* number of allocation groups */
@@ -397,6 +407,7 @@ xfs_sb_has_ro_compat_feature(
#define XFS_SB_FEAT_INCOMPAT_BIGTIME (1 << 3) /* large timestamps */
#define XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR (1 << 4) /* needs xfs_repair */
#define XFS_SB_FEAT_INCOMPAT_NREXT64 (1 << 5) /* large extent counters */
+#define XFS_SB_FEAT_INCOMPAT_RTGROUPS (1 << 30) /* realtime groups */
#define XFS_SB_FEAT_INCOMPAT_METADIR (1U << 31) /* metadata dir tree */
#define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE| \
@@ -741,6 +752,55 @@ union xfs_suminfo_ondisk {
__u32 raw;
};
+/*
+ * Realtime allocation groups break the rt section into multiple pieces that
+ * could be locked independently. Realtime block group numbers are 32-bit
+ * quantities. Block numbers within a group are also 32-bit quantities, but
+ * the upper bit must never be set.
+ */
+#define XFS_MAX_RGBLOCKS ((xfs_rgblock_t)(1U << 31) - 1)
+#define XFS_MAX_RGNUMBER ((xfs_rgnumber_t)(-1U))
+
+#define XFS_RTSB_MAGIC 0x58524750 /* 'XRGP' */
+
+/*
+ * Realtime superblock - on disk version. Must be padded to 64 bit alignment.
+ * The first block of each realtime group contains this superblock; this is
+ * how we avoid having file data extents cross a group boundary.
+ */
+struct xfs_rtsb {
+ __be32 rsb_magicnum; /* magic number == XFS_RTSB_MAGIC */
+ __be32 rsb_blocksize; /* logical block size, bytes */
+ __be64 rsb_rblocks; /* number of realtime blocks */
+
+ __be64 rsb_rextents; /* number of realtime extents */
+ __be64 rsb_lsn; /* last write sequence */
+
+ __be32 rsb_rgcount; /* # of realtime groups */
+ char rsb_fname[XFSLABEL_MAX]; /* rt volume name */
+
+ uuid_t rsb_uuid; /* user-visible file system unique id */
+
+ __be32 rsb_rextsize; /* realtime extent size, blocks */
+ __be32 rsb_rbmblocks; /* number of rt bitmap blocks */
+
+ __be32 rsb_rgblocks; /* rt blocks per group */
+ __u8 rsb_blocklog; /* log2 of sb_blocksize */
+ __u8 rsb_sectlog; /* log2 of sb_sectsize */
+ __u8 rsb_rextslog; /* log2 of sb_rextents */
+ __u8 rsb_pad;
+
+ __le32 rsb_crc; /* superblock crc */
+ __le32 rsb_pad2;
+
+ uuid_t rsb_meta_uuid; /* metadata file system unique id */
+
+ /* must be padded to 64 bit alignment */
+};
+
+#define XFS_RTSB_CRC_OFF offsetof(struct xfs_rtsb, rsb_crc)
+#define XFS_RTSB_DADDR ((xfs_daddr_t)0) /* daddr in rt section */
+
/*
* XFS Timestamps
* ==============
diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c
index ced2bd896106..edbc427725c3 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.c
+++ b/fs/xfs/libxfs/xfs_rtgroup.c
@@ -28,6 +28,7 @@
#include "xfs_trace.h"
#include "xfs_inode.h"
#include "xfs_icache.h"
+#include "xfs_buf_item.h"
#include "xfs_rtgroup.h"
#include "xfs_rtbitmap.h"
@@ -212,3 +213,98 @@ xfs_rtgroup_block_count(
return __xfs_rtgroup_block_count(mp, rgno, mp->m_sb.sb_rgcount,
mp->m_sb.sb_rblocks);
}
+
+static xfs_failaddr_t
+xfs_rtsb_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_mount;
+ struct xfs_rtsb *rsb = bp->b_addr;
+
+ if (!xfs_verify_magic(bp, rsb->rsb_magicnum))
+ return __this_address;
+ if (be32_to_cpu(rsb->rsb_blocksize) != mp->m_sb.sb_blocksize)
+ return __this_address;
+ if (be64_to_cpu(rsb->rsb_rblocks) != mp->m_sb.sb_rblocks)
+ return __this_address;
+
+ if (be64_to_cpu(rsb->rsb_rextents) != mp->m_sb.sb_rextents)
+ return __this_address;
+
+ if (!uuid_equal(&rsb->rsb_uuid, &mp->m_sb.sb_uuid))
+ return __this_address;
+
+ if (be32_to_cpu(rsb->rsb_rgcount) != mp->m_sb.sb_rgcount)
+ return __this_address;
+
+ if (be32_to_cpu(rsb->rsb_rextsize) != mp->m_sb.sb_rextsize)
+ return __this_address;
+ if (be32_to_cpu(rsb->rsb_rbmblocks) != mp->m_sb.sb_rbmblocks)
+ return __this_address;
+
+ if (be32_to_cpu(rsb->rsb_rgblocks) != mp->m_sb.sb_rgblocks)
+ return __this_address;
+ if (rsb->rsb_blocklog != mp->m_sb.sb_blocklog)
+ return __this_address;
+ if (rsb->rsb_sectlog != mp->m_sb.sb_sectlog)
+ return __this_address;
+ if (rsb->rsb_rextslog != mp->m_sb.sb_rextslog)
+ return __this_address;
+ if (rsb->rsb_pad)
+ return __this_address;
+
+ if (rsb->rsb_pad2)
+ return __this_address;
+
+ if (!uuid_equal(&rsb->rsb_meta_uuid, &mp->m_sb.sb_meta_uuid))
+ return __this_address;
+
+ /* Everything to the end of the fs block must be zero */
+ if (memchr_inv(rsb + 1, 0, BBTOB(bp->b_length) - sizeof(*rsb)))
+ return __this_address;
+
+ return NULL;
+}
+
+static void
+xfs_rtsb_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_failaddr_t fa;
+
+ if (!xfs_buf_verify_cksum(bp, XFS_RTSB_CRC_OFF))
+ xfs_verifier_error(bp, -EFSBADCRC, __this_address);
+ else {
+ fa = xfs_rtsb_verify(bp);
+ if (fa)
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
+ }
+}
+
+static void
+xfs_rtsb_write_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_rtsb *rsb = bp->b_addr;
+ struct xfs_buf_log_item *bip = bp->b_log_item;
+ xfs_failaddr_t fa;
+
+ fa = xfs_rtsb_verify(bp);
+ if (fa) {
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
+ return;
+ }
+
+ if (bip)
+ rsb->rsb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
+
+ xfs_buf_update_cksum(bp, XFS_RTSB_CRC_OFF);
+}
+
+const struct xfs_buf_ops xfs_rtsb_buf_ops = {
+ .name = "xfs_rtsb",
+ .magic = { 0, cpu_to_be32(XFS_RTSB_MAGIC) },
+ .verify_read = xfs_rtsb_read_verify,
+ .verify_write = xfs_rtsb_write_verify,
+ .verify_struct = xfs_rtsb_verify,
+};
diff --git a/fs/xfs/libxfs/xfs_rtgroup.h b/fs/xfs/libxfs/xfs_rtgroup.h
index f414218a66f2..ff9b01d8c501 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.h
+++ b/fs/xfs/libxfs/xfs_rtgroup.h
@@ -111,6 +111,89 @@ xfs_verify_rgbext(
return xfs_verify_rgbno(rtg, rgbno + len - 1);
}
+static inline xfs_rtblock_t
+xfs_rgbno_to_rtb(
+ struct xfs_mount *mp,
+ xfs_rgnumber_t rgno,
+ xfs_rgblock_t rgbno)
+{
+ ASSERT(xfs_has_rtgroups(mp));
+
+ if (mp->m_rgblklog >= 0)
+ return ((xfs_rtblock_t)rgno << mp->m_rgblklog) | rgbno;
+
+ return ((xfs_rtblock_t)rgno * mp->m_sb.sb_rgblocks) + rgbno;
+}
+
+static inline xfs_rgnumber_t
+xfs_rtb_to_rgno(
+ struct xfs_mount *mp,
+ xfs_rtblock_t rtbno)
+{
+ ASSERT(xfs_has_rtgroups(mp));
+
+ if (mp->m_rgblklog >= 0)
+ return rtbno >> mp->m_rgblklog;
+
+ return div_u64(rtbno, mp->m_sb.sb_rgblocks);
+}
+
+static inline xfs_rgblock_t
+xfs_rtb_to_rgbno(
+ struct xfs_mount *mp,
+ xfs_rtblock_t rtbno,
+ xfs_rgnumber_t *rgno)
+{
+ uint32_t rem;
+
+ ASSERT(xfs_has_rtgroups(mp));
+
+ if (mp->m_rgblklog >= 0) {
+ *rgno = rtbno >> mp->m_rgblklog;
+ return rtbno & mp->m_rgblkmask;
+ }
+
+ *rgno = div_u64_rem(rtbno, mp->m_sb.sb_rgblocks, &rem);
+ return rem;
+}
+
+static inline xfs_daddr_t
+xfs_rtb_to_daddr(
+ struct xfs_mount *mp,
+ xfs_rtblock_t rtbno)
+{
+ return rtbno << mp->m_blkbb_log;
+}
+
+static inline xfs_rtblock_t
+xfs_daddr_to_rtb(
+ struct xfs_mount *mp,
+ xfs_daddr_t daddr)
+{
+ return daddr >> mp->m_blkbb_log;
+}
+
+static inline xfs_rgnumber_t
+xfs_daddr_to_rgno(
+ struct xfs_mount *mp,
+ xfs_daddr_t daddr)
+{
+ xfs_rtblock_t rtb = daddr >> mp->m_blkbb_log;
+
+ return xfs_rtb_to_rgno(mp, rtb);
+}
+
+static inline xfs_rgblock_t
+xfs_daddr_to_rgbno(
+ struct xfs_mount *mp,
+ xfs_daddr_t daddr)
+{
+ xfs_rtblock_t rtb = daddr >> mp->m_blkbb_log;
+ xfs_rgnumber_t rgno;
+
+ return xfs_rtb_to_rgbno(mp, rtb, &rgno);
+}
+
#ifdef CONFIG_XFS_RT
xfs_rgblock_t xfs_rtgroup_block_count(struct xfs_mount *mp,
xfs_rgnumber_t rgno);
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 48cfb9c8296b..bbadf78b4628 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -176,6 +176,8 @@ xfs_sb_version_to_features(
features |= XFS_FEAT_NREXT64;
if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)
features |= XFS_FEAT_METADIR;
+ if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_RTGROUPS)
+ features |= XFS_FEAT_RTGROUPS;
return features;
}
@@ -302,6 +304,64 @@ xfs_validate_sb_write(
return 0;
}
+static int
+xfs_validate_sb_rtgroups(
+ struct xfs_mount *mp,
+ struct xfs_sb *sbp)
+{
+ uint64_t groups;
+
+ if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) {
+ xfs_warn(mp,
+"Realtime groups require metadata directory tree.");
+ return -EINVAL;
+ }
+
+ if (sbp->sb_rgblocks > XFS_MAX_RGBLOCKS) {
+ xfs_warn(mp,
+"Realtime group size (%u) must be less than %u.",
+ sbp->sb_rgblocks, XFS_MAX_RGBLOCKS);
+ return -EINVAL;
+ }
+
+ if (sbp->sb_rextsize == 0) {
+ xfs_warn(mp,
+"Realtime extent size must not be zero.");
+ return -EINVAL;
+ }
+
+ if (sbp->sb_rgblocks % sbp->sb_rextsize != 0) {
+ xfs_warn(mp,
+"Realtime group size (%u) must be an even multiple of extent size (%u).",
+ sbp->sb_rgblocks, sbp->sb_rextsize);
+ return -EINVAL;
+ }
+
+ if (sbp->sb_rgblocks < (sbp->sb_rextsize << 1)) {
+ xfs_warn(mp,
+"Realtime group size (%u) must be greater than 1 rt extent.",
+ sbp->sb_rgblocks);
+ return -EINVAL;
+ }
+
+ if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) {
+ xfs_warn(mp,
+"Realtime groups (%u) must be less than %u.",
+ sbp->sb_rgcount, XFS_MAX_RGNUMBER);
+ return -EINVAL;
+ }
+
+ groups = howmany_64(sbp->sb_rblocks, sbp->sb_rgblocks);
+ if (groups != sbp->sb_rgcount) {
+ xfs_warn(mp,
+"Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.",
+ sbp->sb_rgcount, groups);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/* Check the validity of the SB. */
STATIC int
xfs_validate_sb_common(
@@ -313,6 +373,7 @@ xfs_validate_sb_common(
uint32_t agcount = 0;
uint32_t rem;
bool has_dalign;
+ int error;
if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
xfs_warn(mp,
@@ -362,6 +423,12 @@ xfs_validate_sb_common(
return -EINVAL;
}
}
+
+ if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_RTGROUPS) {
+ error = xfs_validate_sb_rtgroups(mp, sbp);
+ if (error)
+ return error;
+ }
} else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
xfs_notice(mp,
@@ -642,8 +709,13 @@ __xfs_sb_from_disk(
to->sb_pquotino = NULLFSINO;
}
- to->sb_rgcount = 0;
- to->sb_rgblocks = 0;
+ if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_RTGROUPS) {
+ to->sb_rgcount = be32_to_cpu(from->sb_rgcount);
+ to->sb_rgblocks = be32_to_cpu(from->sb_rgblocks);
+ } else {
+ to->sb_rgcount = 0;
+ to->sb_rgblocks = 0;
+ }
}
void
@@ -803,6 +875,12 @@ xfs_sb_to_disk(
to->sb_gquotino = cpu_to_be64(NULLFSINO);
to->sb_pquotino = cpu_to_be64(NULLFSINO);
}
+
+ if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_RTGROUPS) {
+ /* must come after setting to_rsumino */
+ to->sb_rgcount = cpu_to_be32(from->sb_rgcount);
+ to->sb_rgblocks = cpu_to_be32(from->sb_rgblocks);
+ }
}
/*
@@ -957,8 +1035,8 @@ xfs_sb_mount_common(
mp->m_blockwmask = mp->m_blockwsize - 1;
mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize);
mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize);
- mp->m_rgblklog = 0;
- mp->m_rgblkmask = 0;
+ mp->m_rgblklog = log2_if_power2(sbp->sb_rgblocks);
+ mp->m_rgblkmask = mask64_if_power2(sbp->sb_rgblocks);
mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index 46754fe57361..e76e735b1d05 100644
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -39,6 +39,7 @@ extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
extern const struct xfs_buf_ops xfs_refcountbt_buf_ops;
extern const struct xfs_buf_ops xfs_rmapbt_buf_ops;
extern const struct xfs_buf_ops xfs_rtbuf_ops;
+extern const struct xfs_buf_ops xfs_rtsb_buf_ops;
extern const struct xfs_buf_ops xfs_sb_buf_ops;
extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index f4d700ce185c..61909355731d 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -53,6 +53,7 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
+ XFS_CHECK_STRUCT_SIZE(struct xfs_rtsb, 104);
/* dir/attr trees */
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
