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[Cluster-devel] [PATCH 05/56] libgfs2: move gfs1 structures to libgfs2



>From b41b13ad098be6fb94ecfe44c1acb9a90d2e376c Mon Sep 17 00:00:00 2001
From: Bob Peterson <rpeterso redhat com>
Date: Mon, 8 Aug 2011 11:23:47 -0500
Subject: [PATCH 05/56] libgfs2: move gfs1 structures to libgfs2

This patch moves a number of gfs1-specific structures from gfs2_edit to
libgfs2 so other utils can reference them.
It also changes function rindex_read so it can operate on gfs1 or gfs2
rindex files.

rhbz#675723
---
 gfs2/edit/extended.c   |   11 +++--
 gfs2/edit/hexedit.c    |   13 +++--
 gfs2/edit/hexedit.h    |  126 ------------------------------------------------
 gfs2/libgfs2/libgfs2.h |   94 +++++++++++++++++++++++++++++++++++
 gfs2/libgfs2/super.c   |   41 ++++++++++-----
 5 files changed, 136 insertions(+), 149 deletions(-)

diff --git a/gfs2/edit/extended.c b/gfs2/edit/extended.c
index 575c387..792b724 100644
--- a/gfs2/edit/extended.c
+++ b/gfs2/edit/extended.c
@@ -505,7 +505,8 @@ static int parse_rindex(struct gfs2_inode *dip, int print_rindex)
 
 	start_line = line;
 	error = 0;
-	print_gfs2("RG index entries found: %d.", dip->i_di.di_size / risize());
+	print_gfs2("RG index entries found: %d.", dip->i_di.di_size /
+		   sizeof(struct gfs2_rindex));
 	eol(0);
 	lines_per_row[dmode] = 6;
 	memset(highlighted_addr, 0, sizeof(highlighted_addr));
@@ -513,12 +514,14 @@ static int parse_rindex(struct gfs2_inode *dip, int print_rindex)
 	for (print_entry_ndx=0; ; print_entry_ndx++) {
 		uint64_t roff;
 
-		roff = print_entry_ndx * risize();
+		roff = print_entry_ndx * sizeof(struct gfs2_rindex);
 
 		if (sbd.gfs1)
-			error = gfs1_readi(dip, (void *)&rbuf, roff, risize());
+			error = gfs1_readi(dip, (void *)&rbuf, roff,
+					   sizeof(struct gfs2_rindex));
 		else
-			error = gfs2_readi(dip, (void *)&rbuf, roff, risize());
+			error = gfs2_readi(dip, (void *)&rbuf, roff,
+					   sizeof(struct gfs2_rindex));
 		if (!error) /* end of file */
 			break;
 		gfs2_rindex_in(&ri, rbuf);
diff --git a/gfs2/edit/hexedit.c b/gfs2/edit/hexedit.c
index 651c6f6..49971ef 100644
--- a/gfs2/edit/hexedit.c
+++ b/gfs2/edit/hexedit.c
@@ -1466,7 +1466,8 @@ uint64_t masterblock(const char *fn)
 static void rgcount(void)
 {
 	printf("%lld RGs in this file system.\n",
-	       (unsigned long long)sbd.md.riinode->i_di.di_size / risize());
+	       (unsigned long long)sbd.md.riinode->i_di.di_size /
+	       sizeof(struct gfs2_rindex));
 	inode_put(&sbd.md.riinode);
 	gfs2_rgrp_free(&sbd.rglist);
 	exit(EXIT_SUCCESS);
@@ -1481,7 +1482,7 @@ static uint64_t find_rgrp_block(struct gfs2_inode *dif, int rg)
 	struct gfs2_rindex fbuf, ri;
 	uint64_t foffset, gfs1_adj = 0;
 
-	foffset = rg * risize();
+	foffset = rg * sizeof(struct gfs2_rindex);
 	if (sbd.gfs1) {
 		uint64_t sd_jbsize =
 			(sbd.bsize - sizeof(struct gfs2_meta_header));
@@ -1490,7 +1491,8 @@ static uint64_t find_rgrp_block(struct gfs2_inode *dif, int rg)
 			sizeof(struct gfs2_meta_header);
 		gfs1_adj += sizeof(struct gfs2_meta_header);
 	}
-	amt = gfs2_readi(dif, (void *)&fbuf, foffset + gfs1_adj, risize());
+	amt = gfs2_readi(dif, (void *)&fbuf, foffset + gfs1_adj,
+			 sizeof(struct gfs2_rindex));
 	if (!amt) /* end of file */
 		return 0;
 	gfs2_rindex_in(&ri, (void *)&fbuf);
@@ -1559,11 +1561,12 @@ static uint64_t get_rg_addr(int rgnum)
 	else
 		gblock = masterblock("rindex");
 	riinode = inode_read(&sbd, gblock);
-	if (rgnum < riinode->i_di.di_size / risize())
+	if (rgnum < riinode->i_di.di_size / sizeof(struct gfs2_rindex))
 		rgblk = find_rgrp_block(riinode, rgnum);
 	else
 		fprintf(stderr, "Error: File system only has %lld RGs.\n",
-			(unsigned long long)riinode->i_di.di_size / risize());
+			(unsigned long long)riinode->i_di.di_size /
+			sizeof(struct gfs2_rindex));
 	inode_put(&riinode);
 	return rgblk;
 }
diff --git a/gfs2/edit/hexedit.h b/gfs2/edit/hexedit.h
index 8a3c615..f7b539e 100644
--- a/gfs2/edit/hexedit.h
+++ b/gfs2/edit/hexedit.h
@@ -21,27 +21,6 @@
 enum dsp_mode { HEX_MODE = 0, GFS2_MODE = 1, EXTENDED_MODE = 2, INIT_MODE = 3 };
 #define BLOCK_STACK_SIZE 256
 
-#define GFS_FORMAT_SB           (100)  /* Super-Block */
-#define GFS_METATYPE_SB         (1)    /* Super-Block */
-#define GFS_FORMAT_FS           (1309) /* Filesystem (all-encompassing) */
-#define GFS_FORMAT_MULTI        (1401) /* Multi-Host */
-/* GFS1 Dinode types  */
-#define GFS_FILE_NON            (0)
-#define GFS_FILE_REG            (1)    /* regular file */
-#define GFS_FILE_DIR            (2)    /* directory */
-#define GFS_FILE_LNK            (5)    /* link */
-#define GFS_FILE_BLK            (7)    /* block device node */
-#define GFS_FILE_CHR            (8)    /* character device node */
-#define GFS_FILE_FIFO           (101)  /* fifo/pipe */
-#define GFS_FILE_SOCK           (102)  /* socket */
-
-/* GFS 1 journal block types: */
-#define GFS_LOG_DESC_METADATA   (300)    /* metadata */
-#define GFS_LOG_DESC_IUL        (400)    /* unlinked inode */
-#define GFS_LOG_DESC_IDA        (401)    /* de-allocated inode */
-#define GFS_LOG_DESC_Q          (402)    /* quota */
-#define GFS_LOG_DESC_LAST       (500)    /* final in a logged transaction */
-
 #define pv(struct, member, fmt, fmt2) do {				\
 		print_it("  "#member, fmt, fmt2, struct->member);	\
 	} while (FALSE);
@@ -89,71 +68,6 @@ extern int dsplines;
 extern int dsp_lines[DMODES];
 extern int combined_display;
 
-struct gfs_jindex {
-        uint64_t ji_addr;       /* starting block of the journal */
-        uint32_t ji_nsegment;   /* number (quantity) of segments in journal */
-        uint32_t ji_pad;
-
-        char ji_reserved[64];
-};
-
-struct gfs_log_descriptor {
-	struct gfs2_meta_header ld_header;
-
-	uint32_t ld_type;       /* GFS_LOG_DESC_... Type of this log chunk */
-	uint32_t ld_length;     /* Number of buffers in this chunk */
-	uint32_t ld_data1;      /* descriptor-specific field */
-	uint32_t ld_data2;      /* descriptor-specific field */
-	char ld_reserved[64];
-};
-
-struct gfs_log_header {
-	struct gfs2_meta_header lh_header;
-
-	uint32_t lh_flags;      /* GFS_LOG_HEAD_... */
-	uint32_t lh_pad;
-
-	uint64_t lh_first;     /* Block number of first header in this trans */
-	uint64_t lh_sequence;   /* Sequence number of this transaction */
-
-	uint64_t lh_tail;       /* Block number of log tail */
-	uint64_t lh_last_dump;  /* Block number of last dump */
-
-	char lh_reserved[64];
-};
-
-struct gfs_rindex {
-	uint64_t ri_addr;     /* block # of 1st block (header) in rgrp */
-	uint32_t ri_length;   /* # fs blocks containing rgrp header & bitmap */
-	uint32_t ri_pad;
-
-	uint64_t ri_data1;    /* block # of first data/meta block in rgrp */
-	uint32_t ri_data;     /* number (qty) of data/meta blocks in rgrp */
-
-	uint32_t ri_bitbytes; /* total # bytes used by block alloc bitmap */
-
-	char ri_reserved[64];
-};
-
-struct gfs_rgrp {
-	struct gfs2_meta_header rg_header;
-
-	uint32_t rg_flags;      /* ?? */
-
-	uint32_t rg_free;       /* Number (qty) of free data blocks */
-
-	/* Dinodes are USEDMETA, but are handled separately from other METAs */
-	uint32_t rg_useddi;     /* Number (qty) of dinodes (used or free) */
-	uint32_t rg_freedi;     /* Number (qty) of unused (free) dinodes */
-	struct gfs2_inum rg_freedi_list; /* 1st block in chain of free dinodes */
-
-	/* These META statistics do not include dinodes (used or free) */
-	uint32_t rg_usedmeta;   /* Number (qty) of used metadata blocks */
-	uint32_t rg_freemeta;   /* Number (qty) of unused metadata blocks */
-
-	char rg_reserved[64];
-};
-
 struct gfs2_dirents {
 	uint64_t block;
 	struct gfs2_dirent dirent;
@@ -189,35 +103,6 @@ struct blkstack_info {
 	struct metapath mp;
 };
 
-struct gfs_sb {
-	/*  Order is important; need to be able to read old superblocks
-	    in order to support on-disk version upgrades */
-	struct gfs2_meta_header sb_header;
-
-	uint32_t sb_fs_format;         /* GFS_FORMAT_FS (on-disk version) */
-	uint32_t sb_multihost_format;  /* GFS_FORMAT_MULTI */
-	uint32_t sb_flags;             /* ?? */
-
-	uint32_t sb_bsize;             /* fundamental FS block size in bytes */
-	uint32_t sb_bsize_shift;       /* log2(sb_bsize) */
-	uint32_t sb_seg_size;          /* Journal segment size in FS blocks */
-
-	/* These special inodes do not appear in any on-disk directory. */
-	struct gfs2_inum sb_jindex_di;  /* journal index inode */
-	struct gfs2_inum sb_rindex_di;  /* resource group index inode */
-	struct gfs2_inum sb_root_di;    /* root directory inode */
-
-	/* Default inter-node locking protocol (lock module) and namespace */
-	char sb_lockproto[GFS2_LOCKNAME_LEN]; /* lock protocol name */
-	char sb_locktable[GFS2_LOCKNAME_LEN]; /* unique name for this FS */
-
-	/* More special inodes */
-	struct gfs2_inum sb_quota_di;   /* quota inode */
-	struct gfs2_inum sb_license_di; /* license inode */
-
-	char sb_reserved[96];
-};
-
 extern struct blkstack_info blockstack[BLOCK_STACK_SIZE];
 extern struct iinfo *indirect; /* more than the most indirect
 			       pointers possible for any given 4K block */
@@ -226,17 +111,6 @@ extern int indirect_blocks;  /* count of indirect blocks */
 extern enum dsp_mode dmode;
 
 /* ------------------------------------------------------------------------ */
-/* risize - size of one rindex entry, whether gfs1 or gfs2                  */
-/* ------------------------------------------------------------------------ */
-static inline int risize(void)
-{
-	if (sbd.gfs1)
-		return sizeof(struct gfs_rindex);
-	else
-		return sizeof(struct gfs2_rindex);
-}
-
-/* ------------------------------------------------------------------------ */
 /* block_is_rglist - there's no such block as the rglist.  This is a        */
 /*                   special case meant to parse the rindex and follow the  */
 /*                   blocks to the real rgs.                                */
diff --git a/gfs2/libgfs2/libgfs2.h b/gfs2/libgfs2/libgfs2.h
index 82c39f1..254a8e6 100644
--- a/gfs2/libgfs2/libgfs2.h
+++ b/gfs2/libgfs2/libgfs2.h
@@ -568,6 +568,100 @@ struct gfs_dinode {
 	char di_reserved[56];
 };
 
+struct gfs_sb {
+	/*  Order is important; need to be able to read old superblocks
+	    in order to support on-disk version upgrades */
+	struct gfs2_meta_header sb_header;
+
+	uint32_t sb_fs_format;         /* GFS_FORMAT_FS (on-disk version) */
+	uint32_t sb_multihost_format;  /* GFS_FORMAT_MULTI */
+	uint32_t sb_flags;             /* ?? */
+
+	uint32_t sb_bsize;             /* fundamental FS block size in bytes */
+	uint32_t sb_bsize_shift;       /* log2(sb_bsize) */
+	uint32_t sb_seg_size;          /* Journal segment size in FS blocks */
+
+	/* These special inodes do not appear in any on-disk directory. */
+	struct gfs2_inum sb_jindex_di;  /* journal index inode */
+	struct gfs2_inum sb_rindex_di;  /* resource group index inode */
+	struct gfs2_inum sb_root_di;    /* root directory inode */
+
+	/* Default inter-node locking protocol (lock module) and namespace */
+	char sb_lockproto[GFS2_LOCKNAME_LEN]; /* lock protocol name */
+	char sb_locktable[GFS2_LOCKNAME_LEN]; /* unique name for this FS */
+
+	/* More special inodes */
+	struct gfs2_inum sb_quota_di;   /* quota inode */
+	struct gfs2_inum sb_license_di; /* license inode */
+
+	char sb_reserved[96];
+};
+
+struct gfs_rgrp {
+	struct gfs2_meta_header rg_header;
+
+	uint32_t rg_flags;      /* ?? */
+
+	uint32_t rg_free;       /* Number (qty) of free data blocks */
+
+	/* Dinodes are USEDMETA, but are handled separately from other METAs */
+	uint32_t rg_useddi;     /* Number (qty) of dinodes (used or free) */
+	uint32_t rg_freedi;     /* Number (qty) of unused (free) dinodes */
+	struct gfs2_inum rg_freedi_list; /* 1st block in chain of free dinodes */
+
+	/* These META statistics do not include dinodes (used or free) */
+	uint32_t rg_usedmeta;   /* Number (qty) of used metadata blocks */
+	uint32_t rg_freemeta;   /* Number (qty) of unused metadata blocks */
+
+	char rg_reserved[64];
+};
+
+struct gfs_log_header {
+	struct gfs2_meta_header lh_header;
+
+	uint32_t lh_flags;      /* GFS_LOG_HEAD_... */
+	uint32_t lh_pad;
+
+	uint64_t lh_first;     /* Block number of first header in this trans */
+	uint64_t lh_sequence;   /* Sequence number of this transaction */
+
+	uint64_t lh_tail;       /* Block number of log tail */
+	uint64_t lh_last_dump;  /* Block number of last dump */
+
+	char lh_reserved[64];
+};
+
+struct gfs_rindex {
+	uint64_t ri_addr;     /* block # of 1st block (header) in rgrp */
+	uint32_t ri_length;   /* # fs blocks containing rgrp header & bitmap */
+	uint32_t ri_pad;
+
+	uint64_t ri_data1;    /* block # of first data/meta block in rgrp */
+	uint32_t ri_data;     /* number (qty) of data/meta blocks in rgrp */
+
+	uint32_t ri_bitbytes; /* total # bytes used by block alloc bitmap */
+
+	char ri_reserved[64];
+};
+
+struct gfs_jindex {
+        uint64_t ji_addr;       /* starting block of the journal */
+        uint32_t ji_nsegment;   /* number (quantity) of segments in journal */
+        uint32_t ji_pad;
+
+        char ji_reserved[64];
+};
+
+struct gfs_log_descriptor {
+	struct gfs2_meta_header ld_header;
+
+	uint32_t ld_type;       /* GFS_LOG_DESC_... Type of this log chunk */
+	uint32_t ld_length;     /* Number of buffers in this chunk */
+	uint32_t ld_data1;      /* descriptor-specific field */
+	uint32_t ld_data2;      /* descriptor-specific field */
+	char ld_reserved[64];
+};
+
 extern void gfs1_lookup_block(struct gfs2_inode *ip,
 			      struct gfs2_buffer_head *bh,
 			      unsigned int height, struct metapath *mp,
diff --git a/gfs2/libgfs2/super.c b/gfs2/libgfs2/super.c
index ee18850..9e8d079 100644
--- a/gfs2/libgfs2/super.c
+++ b/gfs2/libgfs2/super.c
@@ -145,7 +145,10 @@ int rindex_read(struct gfs2_sbd *sdp, int fd, int *count1, int *sane)
 {
 	unsigned int rg;
 	int error;
-	struct gfs2_rindex buf;
+	union {
+		struct gfs_rindex bufgfs1;
+		struct gfs2_rindex bufgfs2;
+	} buf;
 	struct rgrp_list *rgd, *prev_rgd;
 	uint64_t prev_length = 0;
 
@@ -157,8 +160,14 @@ int rindex_read(struct gfs2_sbd *sdp, int fd, int *count1, int *sane)
 	for (rg = 0; ; rg++) {
 		if (fd > 0)
 			error = read(fd, &buf, sizeof(struct gfs2_rindex));
+		else if (sdp->gfs1)
+			error = gfs1_readi(sdp->md.riinode,
+					   (char *)&buf.bufgfs1,
+					   rg * sizeof(struct gfs2_rindex),
+					   sizeof(struct gfs2_rindex));
 		else
-			error = gfs2_readi(sdp->md.riinode, (char *)&buf,
+			error = gfs2_readi(sdp->md.riinode,
+					   (char *)&buf.bufgfs2,
 					   rg * sizeof(struct gfs2_rindex),
 					   sizeof(struct gfs2_rindex));
 		if (!error)
@@ -174,23 +183,27 @@ int rindex_read(struct gfs2_sbd *sdp, int fd, int *count1, int *sane)
 		memset(rgd, 0, sizeof(struct rgrp_list));
 		osi_list_add_prev(&rgd->list, &sdp->rglist);
 
-		gfs2_rindex_in(&rgd->ri, (char *)&buf);
+		gfs2_rindex_in(&rgd->ri, (char *)&buf.bufgfs2);
 
 		rgd->start = rgd->ri.ri_addr;
 		if (prev_rgd) {
 			/* If rg addresses go backwards, it's not sane
 			   (or it's converted from gfs1). */
-			if (prev_rgd->start >= rgd->start)
-				*sane = 0;
-			/* If rg lengths are not consistent, it's not sane
-			   (or it's converted from gfs1).  The first RG will
-			   be a different length due to space allocated for
-			   the superblock, so we can't detect this until
-			   we check rgrp 3, when we can compare the distance
-			   between rgrp 1 and rgrp 2. */
-			if (rg > 2 && prev_length &&
-			    prev_length != rgd->start - prev_rgd->start)
-				*sane = 0;
+			if (!sdp->gfs1) {
+				if (prev_rgd->start >= rgd->start)
+					*sane = 0;
+				/* If rg lengths are not consistent, it's not
+				   sane (or it's converted from gfs1).  The
+				   first RG will be a different length due to
+				   space allocated for the superblock, so we
+				   can't detect this until we check rgrp 3,
+				   when we can compare the distance between
+				   rgrp 1 and rgrp 2. */
+				if (rg > 2 && prev_length &&
+				    prev_length != rgd->start -
+				    prev_rgd->start)
+					*sane = 0;
+			}
 			prev_length = rgd->start - prev_rgd->start;
 			prev_rgd->length = prev_length;
 		}
-- 
1.7.4.4


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