xfs: move growfs core to libxfs

So it can be shared with userspace (e.g. mkfs) easily.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

1 files changed, 4 insertions, 475 deletions

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index ca3cf3f6239a..c5087b79bcea 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -24,11 +24,7 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
-#include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_error.h"
 #include "xfs_btree.h"
 #include "xfs_alloc_btree.h"
@@ -36,412 +32,18 @@
 #include "xfs_rmap_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_fsops.h"
-#include "xfs_itable.h"
 #include "xfs_trans_space.h"
 #include "xfs_rtalloc.h"
 #include "xfs_trace.h"
 #include "xfs_log.h"
-#include "xfs_filestream.h"
 #include "xfs_rmap.h"
+#include "xfs_ag.h"
 #include "xfs_ag_resv.h"
 
 /*
- * File system operations
- */
-
-static struct xfs_buf *
-xfs_growfs_get_hdr_buf(
-	struct xfs_mount	*mp,
-	xfs_daddr_t		blkno,
-	size_t			numblks,
-	int			flags,
-	const struct xfs_buf_ops *ops)
-{
-	struct xfs_buf		*bp;
-
-	bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
-	if (!bp)
-		return NULL;
-
-	xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
-	bp->b_bn = blkno;
-	bp->b_maps[0].bm_bn = blkno;
-	bp->b_ops = ops;
-
-	return bp;
-}
-
-struct aghdr_init_data {
-	/* per ag data */
-	xfs_agnumber_t		agno;		/* ag to init */
-	xfs_extlen_t		agsize;		/* new AG size */
-	struct list_head	buffer_list;	/* buffer writeback list */
-	xfs_rfsblock_t		nfree;		/* cumulative new free space */
-
-	/* per header data */
-	xfs_daddr_t		daddr;		/* header location */
-	size_t			numblks;	/* size of header */
-	xfs_btnum_t		type;		/* type of btree root block */
-};
-
-/*
- * Generic btree root block init function
- */
-static void
-xfs_btroot_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno, 0);
-}
-
-/*
- * Alloc btree root block init functions
- */
-static void
-xfs_bnoroot_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_alloc_rec	*arec;
-
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno, 0);
-	arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
-	arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
-	arec->ar_blockcount = cpu_to_be32(id->agsize -
-					  be32_to_cpu(arec->ar_startblock));
-}
-
-static void
-xfs_cntroot_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_alloc_rec	*arec;
-
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno, 0);
-	arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
-	arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
-	arec->ar_blockcount = cpu_to_be32(id->agsize -
-					  be32_to_cpu(arec->ar_startblock));
-}
-
-/*
- * Reverse map root block init
- */
-static void
-xfs_rmaproot_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
-	struct xfs_rmap_rec	*rrec;
-
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno, 0);
-
-	/*
-	 * mark the AG header regions as static metadata The BNO
-	 * btree block is the first block after the headers, so
-	 * it's location defines the size of region the static
-	 * metadata consumes.
-	 *
-	 * Note: unlike mkfs, we never have to account for log
-	 * space when growing the data regions
-	 */
-	rrec = XFS_RMAP_REC_ADDR(block, 1);
-	rrec->rm_startblock = 0;
-	rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
-	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);
-	rrec->rm_offset = 0;
-
-	/* account freespace btree root blocks */
-	rrec = XFS_RMAP_REC_ADDR(block, 2);
-	rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
-	rrec->rm_blockcount = cpu_to_be32(2);
-	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
-	rrec->rm_offset = 0;
-
-	/* account inode btree root blocks */
-	rrec = XFS_RMAP_REC_ADDR(block, 3);
-	rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));
-	rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -
-					  XFS_IBT_BLOCK(mp));
-	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
-	rrec->rm_offset = 0;
-
-	/* account for rmap btree root */
-	rrec = XFS_RMAP_REC_ADDR(block, 4);
-	rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));
-	rrec->rm_blockcount = cpu_to_be32(1);
-	rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
-	rrec->rm_offset = 0;
-
-	/* account for refc btree root */
-	if (xfs_sb_version_hasreflink(&mp->m_sb)) {
-		rrec = XFS_RMAP_REC_ADDR(block, 5);
-		rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp));
-		rrec->rm_blockcount = cpu_to_be32(1);
-		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);
-		rrec->rm_offset = 0;
-		be16_add_cpu(&block->bb_numrecs, 1);
-	}
-}
-
-/*
- * Initialise new secondary superblocks with the pre-grow geometry, but mark
- * them as "in progress" so we know they haven't yet been activated. This will
- * get cleared when the update with the new geometry information is done after
- * changes to the primary are committed. This isn't strictly necessary, but we
- * get it for free with the delayed buffer write lists and it means we can tell
- * if a grow operation didn't complete properly after the fact.
- */
-static void
-xfs_sbblock_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_dsb		*dsb = XFS_BUF_TO_SBP(bp);
-
-	xfs_sb_to_disk(dsb, &mp->m_sb);
-	dsb->sb_inprogress = 1;
-}
-
-static void
-xfs_agfblock_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_agf		*agf = XFS_BUF_TO_AGF(bp);
-	xfs_extlen_t		tmpsize;
-
-	agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
-	agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
-	agf->agf_seqno = cpu_to_be32(id->agno);
-	agf->agf_length = cpu_to_be32(id->agsize);
-	agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
-	agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
-	agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
-	agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
-	if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
-		agf->agf_roots[XFS_BTNUM_RMAPi] =
-					cpu_to_be32(XFS_RMAP_BLOCK(mp));
-		agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1);
-		agf->agf_rmap_blocks = cpu_to_be32(1);
-	}
-
-	agf->agf_flfirst = cpu_to_be32(1);
-	agf->agf_fllast = 0;
-	agf->agf_flcount = 0;
-	tmpsize = id->agsize - mp->m_ag_prealloc_blocks;
-	agf->agf_freeblks = cpu_to_be32(tmpsize);
-	agf->agf_longest = cpu_to_be32(tmpsize);
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
-	if (xfs_sb_version_hasreflink(&mp->m_sb)) {
-		agf->agf_refcount_root = cpu_to_be32(
-				xfs_refc_block(mp));
-		agf->agf_refcount_level = cpu_to_be32(1);
-		agf->agf_refcount_blocks = cpu_to_be32(1);
-	}
-}
-
-static void
-xfs_agflblock_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_agfl		*agfl = XFS_BUF_TO_AGFL(bp);
-	__be32			*agfl_bno;
-	int			bucket;
-
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
-		agfl->agfl_seqno = cpu_to_be32(id->agno);
-		uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
-	}
-
-	agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
-	for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)
-		agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
-}
-
-static void
-xfs_agiblock_init(
-	struct xfs_mount	*mp,
-	struct xfs_buf		*bp,
-	struct aghdr_init_data	*id)
-{
-	struct xfs_agi		*agi = XFS_BUF_TO_AGI(bp);
-	int			bucket;
-
-	agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
-	agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
-	agi->agi_seqno = cpu_to_be32(id->agno);
-	agi->agi_length = cpu_to_be32(id->agsize);
-	agi->agi_count = 0;
-	agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
-	agi->agi_level = cpu_to_be32(1);
-	agi->agi_freecount = 0;
-	agi->agi_newino = cpu_to_be32(NULLAGINO);
-	agi->agi_dirino = cpu_to_be32(NULLAGINO);
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
-	if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
-		agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
-		agi->agi_free_level = cpu_to_be32(1);
-	}
-	for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
-		agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
-}
-
-typedef void (*aghdr_init_work_f)(struct xfs_mount *mp, struct xfs_buf *bp,
-				  struct aghdr_init_data *id);
-static int
-xfs_growfs_init_aghdr(
-	struct xfs_mount	*mp,
-	struct aghdr_init_data	*id,
-	aghdr_init_work_f	work,
-	const struct xfs_buf_ops *ops)
-
-{
-	struct xfs_buf		*bp;
-
-	bp = xfs_growfs_get_hdr_buf(mp, id->daddr, id->numblks, 0, ops);
-	if (!bp)
-		return -ENOMEM;
-
-	(*work)(mp, bp, id);
-
-	xfs_buf_delwri_queue(bp, &id->buffer_list);
-	xfs_buf_relse(bp);
-	return 0;
-}
-
-struct xfs_aghdr_grow_data {
-	xfs_daddr_t		daddr;
-	size_t			numblks;
-	const struct xfs_buf_ops *ops;
-	aghdr_init_work_f	work;
-	xfs_btnum_t		type;
-	bool			need_init;
-};
-
-/*
- * Write new AG headers to disk. Non-transactional, but written
- * synchronously so they are completed prior to the growfs transaction
- * being logged.
+ * growfs operations
  */
 static int
-xfs_grow_ag_headers(
-	struct xfs_mount	*mp,
-	struct aghdr_init_data	*id)
-
-{
-	struct xfs_aghdr_grow_data aghdr_data[] = {
-	{ /* SB */
-		.daddr = XFS_AG_DADDR(mp, id->agno, XFS_SB_DADDR),
-		.numblks = XFS_FSS_TO_BB(mp, 1),
-		.ops = &xfs_sb_buf_ops,
-		.work = &xfs_sbblock_init,
-		.need_init = true
-	},
-	{ /* AGF */
-		.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp)),
-		.numblks = XFS_FSS_TO_BB(mp, 1),
-		.ops = &xfs_agf_buf_ops,
-		.work = &xfs_agfblock_init,
-		.need_init = true
-	},
-	{ /* AGFL */
-		.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp)),
-		.numblks = XFS_FSS_TO_BB(mp, 1),
-		.ops = &xfs_agfl_buf_ops,
-		.work = &xfs_agflblock_init,
-		.need_init = true
-	},
-	{ /* AGI */
-		.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp)),
-		.numblks = XFS_FSS_TO_BB(mp, 1),
-		.ops = &xfs_agi_buf_ops,
-		.work = &xfs_agiblock_init,
-		.need_init = true
-	},
-	{ /* BNO root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_allocbt_buf_ops,
-		.work = &xfs_bnoroot_init,
-		.need_init = true
-	},
-	{ /* CNT root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_allocbt_buf_ops,
-		.work = &xfs_cntroot_init,
-		.need_init = true
-	},
-	{ /* INO root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_inobt_buf_ops,
-		.work = &xfs_btroot_init,
-		.type = XFS_BTNUM_INO,
-		.need_init = true
-	},
-	{ /* FINO root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_inobt_buf_ops,
-		.work = &xfs_btroot_init,
-		.type = XFS_BTNUM_FINO,
-		.need_init =  xfs_sb_version_hasfinobt(&mp->m_sb)
-	},
-	{ /* RMAP root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_rmapbt_buf_ops,
-		.work = &xfs_rmaproot_init,
-		.need_init = xfs_sb_version_hasrmapbt(&mp->m_sb)
-	},
-	{ /* REFC root block */
-		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)),
-		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_refcountbt_buf_ops,
-		.work = &xfs_btroot_init,
-		.type = XFS_BTNUM_REFC,
-		.need_init = xfs_sb_version_hasreflink(&mp->m_sb)
-	},
-	{ /* NULL terminating block */
-		.daddr = XFS_BUF_DADDR_NULL,
-	}
-	};
-	struct  xfs_aghdr_grow_data *dp;
-	int			error = 0;
-
-	/* Account for AG free space in new AG */
-	id->nfree += id->agsize - mp->m_ag_prealloc_blocks;
-	for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) {
-		if (!dp->need_init)
-			continue;
-
-		id->daddr = dp->daddr;
-		id->numblks = dp->numblks;
-		id->type = dp->type;
-		error = xfs_growfs_init_aghdr(mp, id, dp->work, dp->ops);
-		if (error)
-			break;
-	}
-	return error;
-}
-
-static int
 xfs_growfs_data_private(
 	xfs_mount_t		*mp,		/* mount point for filesystem */
 	xfs_growfs_data_t	*in)		/* growfs data input struct */
@@ -518,7 +120,7 @@ xfs_growfs_data_private(
 		else
 			id.agsize = mp->m_sb.sb_agblocks;
 
-		error = xfs_grow_ag_headers(mp, &id);
+		error = xfs_ag_init_headers(mp, &id);
 		if (error) {
 			xfs_buf_delwri_cancel(&id.buffer_list);
 			goto out_trans_cancel;
@@ -683,79 +285,6 @@ xfs_growfs_imaxpct(
 }
 
 /*
- * After a grow operation, we need to update all the secondary superblocks
- * to match the new state of the primary. Because we are completely overwriting
- * all the existing fields in the secondary superblock buffers, there is no need
- * to read them in from disk. Just get a new buffer, stamp it and write it.
- *
- * The sb buffers need to be cached here so that we serialise against scrub
- * scanning secondary superblocks, but we don't want to keep it in memory once
- * it is written so we mark it as a one-shot buffer.
- */
-static int
-xfs_growfs_update_superblocks(
-	struct xfs_mount	*mp)
-{
-	xfs_agnumber_t		agno;
-	int			saved_error = 0;
-	int			error = 0;
-	LIST_HEAD		(buffer_list);
-
-	/* update secondary superblocks. */
-	for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) {
-		struct xfs_buf		*bp;
-
-		bp = xfs_buf_get(mp->m_ddev_targp,
-				 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
-				 XFS_FSS_TO_BB(mp, 1), 0);
-		/*
-		 * If we get an error reading or writing alternate superblocks,
-		 * continue.  xfs_repair chooses the "best" superblock based
-		 * on most matches; if we break early, we'll leave more
-		 * superblocks un-updated than updated, and xfs_repair may
-		 * pick them over the properly-updated primary.
-		 */
-		if (!bp) {
-			xfs_warn(mp,
-		"error allocating secondary superblock for ag %d",
-				agno);
-			if (!saved_error)
-				saved_error = -ENOMEM;
-			continue;
-		}
-
-		bp->b_ops = &xfs_sb_buf_ops;
-		xfs_buf_oneshot(bp);
-		xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
-		xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
-		xfs_buf_delwri_queue(bp, &buffer_list);
-		xfs_buf_relse(bp);
-
-		/* don't hold too many buffers at once */
-		if (agno % 16)
-			continue;
-
-		error = xfs_buf_delwri_submit(&buffer_list);
-		if (error) {
-			xfs_warn(mp,
-		"write error %d updating a secondary superblock near ag %d",
-				error, agno);
-			if (!saved_error)
-				saved_error = error;
-			continue;
-		}
-	}
-	error = xfs_buf_delwri_submit(&buffer_list);
-	if (error) {
-		xfs_warn(mp,
-		"write error %d updating a secondary superblock near ag %d",
-			error, agno);
-	}
-
-	return saved_error ? saved_error : error;
-}
-
-/*
  * protected versions of growfs function acquire and release locks on the mount
  * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
  * XFS_IOC_FSGROWFSRT
@@ -794,7 +323,7 @@ xfs_growfs_data(
 		mp->m_maxicount = 0;
 
 	/* Update secondary superblocks now the physical grow has completed */
-	error = xfs_growfs_update_superblocks(mp);
+	error = xfs_update_secondary_sbs(mp);
 
 out_error:
 	/*