So that external programs can directly use it.
Signed-off-by: Gao Xiang <hsiang...@linux.alibaba.com>
---
include/erofs/internal.h | 4 +++
lib/super.c | 52 ++++++++++++++++++++++++++++++++
mkfs/main.c | 64 +++-------------------------------------
3 files changed, 60 insertions(+), 60 deletions(-)
diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index d93bfab..f1d85be 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -134,6 +134,8 @@ struct erofs_sb_info {
bool useqpl;
};
+#define EROFS_SUPER_END (EROFS_SUPER_OFFSET + sizeof(struct erofs_super_block))
+
/* make sure that any user of the erofs headers has atleast 64bit off_t type */
extern int erofs_assert_largefile[sizeof(off_t)-8];
@@ -393,6 +395,8 @@ struct erofs_map_dev {
/* super.c */
int erofs_read_superblock(struct erofs_sb_info *sbi);
void erofs_put_super(struct erofs_sb_info *sbi);
+int erofs_writesb(struct erofs_sb_info *sbi, struct erofs_buffer_head *sb_bh,
+ erofs_blk_t *blocks);
/* namei.c */
int erofs_read_inode_from_disk(struct erofs_inode *vi);
diff --git a/lib/super.c b/lib/super.c
index 6de5e49..33e908a 100644
--- a/lib/super.c
+++ b/lib/super.c
@@ -6,6 +6,7 @@
#include <stdlib.h>
#include "erofs/print.h"
#include "erofs/xattr.h"
+#include "erofs/cache.h"
static bool check_layout_compatibility(struct erofs_sb_info *sbi,
struct erofs_super_block *dsb)
@@ -149,3 +150,54 @@ void erofs_put_super(struct erofs_sb_info *sbi)
}
erofs_xattr_prefixes_cleanup(sbi);
}
+
+int erofs_writesb(struct erofs_sb_info *sbi, struct erofs_buffer_head *sb_bh,
+ erofs_blk_t *blocks)
+{
+ struct erofs_super_block sb = {
+ .magic = cpu_to_le32(EROFS_SUPER_MAGIC_V1),
+ .blkszbits = sbi->blkszbits,
+ .root_nid = cpu_to_le16(sbi->root_nid),
+ .inos = cpu_to_le64(sbi->inos),
+ .build_time = cpu_to_le64(sbi->build_time),
+ .build_time_nsec = cpu_to_le32(sbi->build_time_nsec),
+ .meta_blkaddr = cpu_to_le32(sbi->meta_blkaddr),
+ .xattr_blkaddr = cpu_to_le32(sbi->xattr_blkaddr),
+ .xattr_prefix_count = sbi->xattr_prefix_count,
+ .xattr_prefix_start = cpu_to_le32(sbi->xattr_prefix_start),
+ .feature_incompat = cpu_to_le32(sbi->feature_incompat),
+ .feature_compat = cpu_to_le32(sbi->feature_compat &
+ ~EROFS_FEATURE_COMPAT_SB_CHKSUM),
+ .extra_devices = cpu_to_le16(sbi->extra_devices),
+ .devt_slotoff = cpu_to_le16(sbi->devt_slotoff),
+ .packed_nid = cpu_to_le64(sbi->packed_nid),
+ };
+ const u32 sb_blksize = round_up(EROFS_SUPER_END, erofs_blksiz(sbi));
+ char *buf;
+ int ret;
+
+ *blocks = erofs_mapbh(NULL);
+ sb.blocks = cpu_to_le32(*blocks);
+ memcpy(sb.uuid, sbi->uuid, sizeof(sb.uuid));
+ memcpy(sb.volume_name, sbi->volume_name, sizeof(sb.volume_name));
+
+ if (erofs_sb_has_compr_cfgs(sbi))
+ sb.u1.available_compr_algs =
cpu_to_le16(sbi->available_compr_algs);
+ else
+ sb.u1.lz4_max_distance = cpu_to_le16(sbi->lz4_max_distance);
+
+ buf = calloc(sb_blksize, 1);
+ if (!buf) {
+ erofs_err("failed to allocate memory for sb: %s",
+ erofs_strerror(-errno));
+ return -ENOMEM;
+ }
+ memcpy(buf + EROFS_SUPER_OFFSET, &sb, sizeof(sb));
+
+ ret = erofs_dev_write(sbi, buf, sb_bh ? erofs_btell(sb_bh, false) : 0,
+ EROFS_SUPER_END);
+ free(buf);
+ if (sb_bh)
+ erofs_bdrop(sb_bh, false);
+ return ret;
+}
diff --git a/mkfs/main.c b/mkfs/main.c
index 007bea8..6577267 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -32,8 +32,6 @@
#include "../lib/liberofs_uuid.h"
#include "../lib/compressor.h"
-#define EROFS_SUPER_END (EROFS_SUPER_OFFSET + sizeof(struct erofs_super_block))
-
static struct option long_options[] = {
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
@@ -935,58 +933,6 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
return 0;
}
-int erofs_mkfs_update_super_block(struct erofs_buffer_head *bh,
- erofs_nid_t root_nid,
- erofs_blk_t *blocks,
- erofs_nid_t packed_nid)
-{
- struct erofs_super_block sb = {
- .magic = cpu_to_le32(EROFS_SUPER_MAGIC_V1),
- .blkszbits = sbi.blkszbits,
- .inos = cpu_to_le64(sbi.inos),
- .build_time = cpu_to_le64(sbi.build_time),
- .build_time_nsec = cpu_to_le32(sbi.build_time_nsec),
- .blocks = 0,
- .meta_blkaddr = cpu_to_le32(sbi.meta_blkaddr),
- .xattr_blkaddr = cpu_to_le32(sbi.xattr_blkaddr),
- .xattr_prefix_count = sbi.xattr_prefix_count,
- .xattr_prefix_start = cpu_to_le32(sbi.xattr_prefix_start),
- .feature_incompat = cpu_to_le32(sbi.feature_incompat),
- .feature_compat = cpu_to_le32(sbi.feature_compat &
- ~EROFS_FEATURE_COMPAT_SB_CHKSUM),
- .extra_devices = cpu_to_le16(sbi.extra_devices),
- .devt_slotoff = cpu_to_le16(sbi.devt_slotoff),
- };
- const u32 sb_blksize = round_up(EROFS_SUPER_END, erofs_blksiz(&sbi));
- char *buf;
- int ret;
-
- *blocks = erofs_mapbh(NULL);
- sb.blocks = cpu_to_le32(*blocks);
- sb.root_nid = cpu_to_le16(root_nid);
- sb.packed_nid = cpu_to_le64(packed_nid);
- memcpy(sb.uuid, sbi.uuid, sizeof(sb.uuid));
- memcpy(sb.volume_name, sbi.volume_name, sizeof(sb.volume_name));
-
- if (erofs_sb_has_compr_cfgs(&sbi))
- sb.u1.available_compr_algs =
cpu_to_le16(sbi.available_compr_algs);
- else
- sb.u1.lz4_max_distance = cpu_to_le16(sbi.lz4_max_distance);
-
- buf = calloc(sb_blksize, 1);
- if (!buf) {
- erofs_err("failed to allocate memory for sb: %s",
- erofs_strerror(-errno));
- return -ENOMEM;
- }
- memcpy(buf + EROFS_SUPER_OFFSET, &sb, sizeof(sb));
-
- ret = erofs_dev_write(&sbi, buf, erofs_btell(bh, false),
EROFS_SUPER_END);
- free(buf);
- erofs_bdrop(bh, false);
- return ret;
-}
-
static int erofs_mkfs_superblock_csum_set(void)
{
int ret;
@@ -1190,7 +1136,6 @@ int main(int argc, char **argv)
int err = 0;
struct erofs_buffer_head *sb_bh;
struct erofs_inode *root_inode, *packed_inode;
- erofs_nid_t root_nid, packed_nid;
erofs_blk_t nblocks;
struct timeval t;
FILE *packedfile = NULL;
@@ -1411,7 +1356,7 @@ int main(int argc, char **argv)
goto exit;
}
}
- root_nid = erofs_lookupnid(root_inode);
+ sbi.root_nid = erofs_lookupnid(root_inode);
erofs_iput(root_inode);
if (erofstar.index_mode && sbi.extra_devices && !erofstar.mapfile)
@@ -1423,7 +1368,7 @@ int main(int argc, char **argv)
goto exit;
}
- packed_nid = 0;
+ sbi.packed_nid = 0;
if ((cfg.c_fragments || cfg.c_extra_ea_name_prefixes) &&
erofs_sb_has_fragments(&sbi)) {
erofs_update_progressinfo("Handling packed_file ...");
@@ -1432,7 +1377,7 @@ int main(int argc, char **argv)
err = PTR_ERR(packed_inode);
goto exit;
}
- packed_nid = erofs_lookupnid(packed_inode);
+ sbi.packed_nid = erofs_lookupnid(packed_inode);
erofs_iput(packed_inode);
}
@@ -1441,8 +1386,7 @@ int main(int argc, char **argv)
if (err)
goto exit;
- err = erofs_mkfs_update_super_block(sb_bh, root_nid, &nblocks,
- packed_nid);
+ err = erofs_writesb(&sbi, sb_bh, &nblocks);
if (err)
goto exit;
--
2.39.3
