[PATCH v2 4/4] erofs-utils: mkfs: add `--inode-digest-xattr` option
Hongbo Li
lihongbo22 at huawei.com
Tue Dec 30 14:44:48 AEDT 2025
On 2025/12/30 2:06, Gao Xiang wrote:
> Based on the original Hongbo's version [1], it enables storing the
> SHA-256 digest of each inode as an extended attribute, in preparation
> for the upcoming page cache sharing feature.
>
> Example usage:
> $ mkfs.erofs --xattr-inode-digest=trusted.erofs.fingerprint [-zlz4hc] foo.erofs foo/
>
> Co-developed-by: Hongbo Li <lihongbo22 at huawei.com>
> [1] https://lore.kernel.org/r/20251118015849.228939-1-lihongbo22@huawei.com
> Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>
Maybe the subject should be changed to "erofs-utils: mkfs: add
`--xattr-inode-digest` option".
Tested-by: Hongbo Li <lihongbo22 at huawei.com>
Thanks,
Hongbo
> ---
> - address Hongbo's comment:
> https://lore.kernel.org/r/9b732162-18a4-442a-b862-50a2cdd4a1a9@huawei.com
>
> include/erofs/internal.h | 2 +
> include/erofs/xattr.h | 2 +
> include/erofs_fs.h | 4 +-
> lib/inode.c | 46 +++++++++-
> lib/super.c | 13 ++-
> lib/xattr.c | 14 ++-
> mkfs/main.c | 186 ++++++++++++++++++++++-----------------
> 7 files changed, 178 insertions(+), 89 deletions(-)
>
> diff --git a/include/erofs/internal.h b/include/erofs/internal.h
> index 62594b877151..5798f10e89c2 100644
> --- a/include/erofs/internal.h
> +++ b/include/erofs/internal.h
> @@ -130,6 +130,7 @@ struct erofs_sb_info {
>
> u32 xattr_prefix_start;
> u8 xattr_prefix_count;
> + u8 ishare_xattr_prefix_id;
> struct erofs_xattr_prefix_item *xattr_prefixes;
>
> struct erofs_vfile bdev;
> @@ -189,6 +190,7 @@ EROFS_FEATURE_FUNCS(metabox, incompat, INCOMPAT_METABOX)
> EROFS_FEATURE_FUNCS(sb_chksum, compat, COMPAT_SB_CHKSUM)
> EROFS_FEATURE_FUNCS(xattr_filter, compat, COMPAT_XATTR_FILTER)
> EROFS_FEATURE_FUNCS(plain_xattr_pfx, compat, COMPAT_PLAIN_XATTR_PFX)
> +EROFS_FEATURE_FUNCS(ishare_xattrs, compat, COMPAT_ISHARE_XATTRS)
>
> #define EROFS_I_EA_INITED_BIT 0
> #define EROFS_I_Z_INITED_BIT 1
> diff --git a/include/erofs/xattr.h b/include/erofs/xattr.h
> index 941bed778956..96546364f316 100644
> --- a/include/erofs/xattr.h
> +++ b/include/erofs/xattr.h
> @@ -33,6 +33,8 @@ char *erofs_export_xattr_ibody(struct erofs_inode *inode);
> int erofs_load_shared_xattrs_from_path(struct erofs_sb_info *sbi, const char *path,
> long inlinexattr_tolerance);
> int erofs_xattr_insert_name_prefix(const char *prefix);
> +int erofs_xattr_set_ishare_prefix(struct erofs_sb_info *sbi,
> + const char *prefix);
> void erofs_xattr_cleanup_name_prefixes(void);
> int erofs_xattr_flush_name_prefixes(struct erofs_importer *im, bool plain);
> int erofs_xattr_prefixes_init(struct erofs_sb_info *sbi);
> diff --git a/include/erofs_fs.h b/include/erofs_fs.h
> index 887f37faba59..8b0d155f8c4c 100644
> --- a/include/erofs_fs.h
> +++ b/include/erofs_fs.h
> @@ -17,6 +17,7 @@
> #define EROFS_FEATURE_COMPAT_MTIME 0x00000002
> #define EROFS_FEATURE_COMPAT_XATTR_FILTER 0x00000004
> #define EROFS_FEATURE_COMPAT_PLAIN_XATTR_PFX 0x00000010
> +#define EROFS_FEATURE_COMPAT_ISHARE_XATTRS 0x00000020
>
> /*
> * Any bits that aren't in EROFS_ALL_FEATURE_INCOMPAT should
> @@ -82,7 +83,8 @@ struct erofs_super_block {
> __le32 xattr_prefix_start; /* start of long xattr prefixes */
> __le64 packed_nid; /* nid of the special packed inode */
> __u8 xattr_filter_reserved; /* reserved for xattr name filter */
> - __u8 reserved[3];
> + __u8 ishare_xattr_prefix_id;
> + __u8 reserved[2];
> __le32 build_time; /* seconds added to epoch for mkfs time */
> __le64 rootnid_8b; /* (48BIT on) nid of root directory */
> __le64 reserved2;
> diff --git a/lib/inode.c b/lib/inode.c
> index 7ee16f4db183..fa0665c4faca 100644
> --- a/lib/inode.c
> +++ b/lib/inode.c
> @@ -31,6 +31,7 @@
> #include "liberofs_metabox.h"
> #include "liberofs_private.h"
> #include "liberofs_rebuild.h"
> +#include "sha256.h"
>
> static inline bool erofs_is_special_identifier(const char *path)
> {
> @@ -1898,6 +1899,37 @@ static int erofs_prepare_dir_inode(const struct erofs_mkfs_btctx *ctx,
> return 0;
> }
>
> +static int erofs_set_inode_fingerprint(struct erofs_inode *inode, int fd,
> + erofs_off_t pos)
> +{
> + u8 ishare_xattr_prefix_id = inode->sbi->ishare_xattr_prefix_id;
> + erofs_off_t remaining = inode->i_size;
> + struct erofs_vfile vf = { .fd = fd };
> + struct sha256_state md;
> + u8 out[32 + sizeof("sha256:") - 1];
> + int ret;
> +
> + if (!ishare_xattr_prefix_id)
> + return 0;
> + erofs_sha256_init(&md);
> + do {
> + u8 buf[32768];
> +
> + ret = erofs_io_pread(&vf, buf,
> + min_t(u64, remaining, sizeof(buf)), pos);
> + if (ret < 0)
> + return ret;
> + if (ret > 0)
> + erofs_sha256_process(&md, buf, ret);
> + remaining -= ret;
> + pos += ret;
> + } while (remaining);
> + erofs_sha256_done(&md, out + sizeof("sha256:") - 1);
> + memcpy(out, "sha256:", sizeof("sha256:") - 1);
> + return erofs_setxattr(inode, ishare_xattr_prefix_id, "",
> + out, sizeof(out));
> +}
> +
> static int erofs_mkfs_begin_nondirectory(const struct erofs_mkfs_btctx *btctx,
> struct erofs_inode *inode)
> {
> @@ -1917,11 +1949,18 @@ static int erofs_mkfs_begin_nondirectory(const struct erofs_mkfs_btctx *btctx,
> ctx.fd = open(inode->i_srcpath, O_RDONLY | O_BINARY);
> if (ctx.fd < 0)
> return -errno;
> - __erofs_fallthrough;
> - default:
> break;
> + default:
> + goto out;
> }
> - if (ctx.fd >= 0 && cfg.c_compr_opts[0].alg &&
> +
> + if (S_ISREG(inode->i_mode) && inode->i_size) {
> + ret = erofs_set_inode_fingerprint(inode, ctx.fd, ctx.fpos);
> + if (ret < 0)
> + return ret;
> + }
> +
> + if (cfg.c_compr_opts[0].alg &&
> erofs_file_is_compressible(im, inode)) {
> ctx.ictx = erofs_prepare_compressed_file(im, inode);
> if (IS_ERR(ctx.ictx))
> @@ -1933,6 +1972,7 @@ static int erofs_mkfs_begin_nondirectory(const struct erofs_mkfs_btctx *btctx,
> return ret;
> }
> }
> +out:
> return erofs_mkfs_go(btctx, EROFS_MKFS_JOB_NDIR, &ctx, sizeof(ctx));
> }
>
> diff --git a/lib/super.c b/lib/super.c
> index e54aff2d4ab7..a4837e5702ed 100644
> --- a/lib/super.c
> +++ b/lib/super.c
> @@ -146,7 +146,15 @@ int erofs_read_superblock(struct erofs_sb_info *sbi)
> sbi->build_time = le32_to_cpu(dsb->build_time);
>
> memcpy(&sbi->uuid, dsb->uuid, sizeof(dsb->uuid));
> -
> + if (erofs_sb_has_ishare_xattrs(sbi)) {
> + if (dsb->ishare_xattr_prefix_id >= sbi->xattr_prefix_count) {
> + erofs_err("invalid ishare xattr prefix id %d",
> + dsb->ishare_xattr_prefix_id);
> + return -EFSCORRUPTED;
> + }
> + sbi->ishare_xattr_prefix_id =
> + dsb->ishare_xattr_prefix_id | EROFS_XATTR_LONG_PREFIX;
> + }
> ret = z_erofs_parse_cfgs(sbi, dsb);
> if (ret)
> return ret;
> @@ -160,7 +168,6 @@ int erofs_read_superblock(struct erofs_sb_info *sbi)
> free(sbi->devs);
> sbi->devs = NULL;
> }
> -
> sbi->sb_valid = !ret;
> return ret;
> }
> @@ -206,6 +213,8 @@ int erofs_writesb(struct erofs_sb_info *sbi)
> .extra_devices = cpu_to_le16(sbi->extra_devices),
> .devt_slotoff = cpu_to_le16(sbi->devt_slotoff),
> .packed_nid = cpu_to_le64(sbi->packed_nid),
> + .ishare_xattr_prefix_id = sbi->ishare_xattr_prefix_id &
> + EROFS_XATTR_LONG_PREFIX_MASK,
> };
> char *buf;
> int ret;
> diff --git a/lib/xattr.c b/lib/xattr.c
> index b6b1a5e600fb..764aee3be3c3 100644
> --- a/lib/xattr.c
> +++ b/lib/xattr.c
> @@ -1495,9 +1495,21 @@ int erofs_xattr_insert_name_prefix(const char *prefix)
> }
>
> tnode->index = EROFS_XATTR_LONG_PREFIX | ea_prefix_count;
> - ea_prefix_count++;
> init_list_head(&tnode->list);
> list_add_tail(&tnode->list, &ea_name_prefixes);
> + return ea_prefix_count++;
> +}
> +
> +int erofs_xattr_set_ishare_prefix(struct erofs_sb_info *sbi,
> + const char *prefix)
> +{
> + int err;
> +
> + err = erofs_xattr_insert_name_prefix(prefix);
> + if (err < 0)
> + return err;
> + sbi->ishare_xattr_prefix_id = EROFS_XATTR_LONG_PREFIX | err;
> + erofs_sb_set_ishare_xattrs(sbi);
> return 0;
> }
>
> diff --git a/mkfs/main.c b/mkfs/main.c
> index aaa0300bca1b..b7cd3a6b986f 100644
> --- a/mkfs/main.c
> +++ b/mkfs/main.c
> @@ -61,7 +61,6 @@ static struct option long_options[] = {
> {"tar", optional_argument, NULL, 20},
> {"aufs", no_argument, NULL, 21},
> {"mount-point", required_argument, NULL, 512},
> - {"xattr-prefix", required_argument, NULL, 19},
> #ifdef WITH_ANDROID
> {"product-out", required_argument, NULL, 513},
> {"fs-config-file", required_argument, NULL, 514},
> @@ -102,6 +101,8 @@ static struct option long_options[] = {
> #endif
> {"zD", optional_argument, NULL, 536},
> {"ZI", optional_argument, NULL, 537},
> + {"xattr-prefix", required_argument, NULL, 538},
> + {"xattr-inode-digest", required_argument, NULL, 539},
> {0, 0, 0, 0},
> };
>
> @@ -167,95 +168,96 @@ static void usage(int argc, char **argv)
> }
> }
> printf(
> - " -C# specify the size of compress physical cluster in bytes\n"
> - " -EX[,...] X=extended options\n"
> - " -L volume-label set the volume label (maximum 15 bytes)\n"
> - " -m#[:X] enable metadata compression (# = physical cluster size in bytes;\n"
> - " X = another compression algorithm for metadata)\n"
> - " -T# specify a fixed UNIX timestamp # as build time\n"
> - " --all-time the timestamp is also applied to all files (default)\n"
> - " --mkfs-time the timestamp is applied as build time only\n"
> - " -UX use a given filesystem UUID\n"
> - " --zD[=<0|1>] specify directory compression: 0=disable [default], 1=enable\n"
> - " --ZI[=<0|1>] specify the separate inode metadata zone availability: 0=disable [default], 1=enable\n"
> - " --all-root make all files owned by root\n"
> + " -C# specify the size of compress physical cluster in bytes\n"
> + " -EX[,...] X=extended options\n"
> + " -L volume-label set the volume label (maximum 15 bytes)\n"
> + " -m#[:X] enable metadata compression (# = physical cluster size in bytes;\n"
> + " X = another compression algorithm for metadata)\n"
> + " -T# specify a fixed UNIX timestamp # as build time\n"
> + " --all-time the timestamp is also applied to all files (default)\n"
> + " --mkfs-time the timestamp is applied as build time only\n"
> + " -UX use a given filesystem UUID\n"
> + " --zD[=<0|1>] specify directory compression: 0=disable [default], 1=enable\n"
> + " --ZI[=<0|1>] specify the separate inode metadata zone availability: 0=disable [default], 1=enable\n"
> + " --all-root make all files owned by root\n"
> #ifdef EROFS_MT_ENABLED
> - " --async-queue-limit=# specify the maximum number of entries in the multi-threaded job queue\n"
> + " --async-queue-limit=# specify the maximum number of entries in the multi-threaded job queue\n"
> #endif
> - " --blobdev=X specify an extra device X to store chunked data\n"
> - " --chunksize=# generate chunk-based files with #-byte chunks\n"
> - " --clean=X run full clean build (default) or:\n"
> - " --incremental=X run incremental build\n"
> - " X = data|rvsp|0 (data: full data, rvsp: space fallocated\n"
> - " 0: inodes zeroed)\n"
> - " --compress-hints=X specify a file to configure per-file compression strategy\n"
> - " --dsunit=# align all data block addresses to multiples of #\n"
> - " --exclude-path=X avoid including file X (X = exact literal path)\n"
> - " --exclude-regex=X avoid including files that match X (X = regular expression)\n"
> + " --blobdev=X specify an extra device X to store chunked data\n"
> + " --chunksize=# generate chunk-based files with #-byte chunks\n"
> + " --clean=X run full clean build (default) or:\n"
> + " --incremental=X run incremental build\n"
> + " X = data|rvsp|0 (data: full data, rvsp: space fallocated\n"
> + " 0: inodes zeroed)\n"
> + " --compress-hints=X specify a file to configure per-file compression strategy\n"
> + " --dsunit=# align all data block addresses to multiples of #\n"
> + " --exclude-path=X avoid including file X (X = exact literal path)\n"
> + " --exclude-regex=X avoid including files that match X (X = regular expression)\n"
> #ifdef HAVE_LIBSELINUX
> - " --file-contexts=X specify a file contexts file to setup selinux labels\n"
> + " --file-contexts=X specify a file contexts file to setup selinux labels\n"
> #endif
> - " --force-uid=# set all file uids to # (# = UID)\n"
> - " --force-gid=# set all file gids to # (# = GID)\n"
> - " --fsalignblks=# specify the alignment of the primary device size in blocks\n"
> - " --uid-offset=# add offset # to all file uids (# = id offset)\n"
> - " --gid-offset=# add offset # to all file gids (# = id offset)\n"
> - " --hard-dereference dereference hardlinks, add links as separate inodes\n"
> - " --ignore-mtime use build time instead of strict per-file modification time\n"
> - " --max-extent-bytes=# set maximum decompressed extent size # in bytes\n"
> - " --mount-point=X X=prefix of target fs path (default: /)\n"
> - " --preserve-mtime keep per-file modification time strictly\n"
> - " --offset=# skip # bytes at the beginning of IMAGE.\n"
> - " --root-xattr-isize=# ensure the inline xattr size of the root directory is # bytes at least\n"
> - " --aufs replace aufs special files with overlayfs metadata\n"
> - " --sort=<path,none> data sorting order for tarballs as input (default: path)\n"
> + " --force-uid=# set all file uids to # (# = UID)\n"
> + " --force-gid=# set all file gids to # (# = GID)\n"
> + " --fsalignblks=# specify the alignment of the primary device size in blocks\n"
> + " --uid-offset=# add offset # to all file uids (# = id offset)\n"
> + " --gid-offset=# add offset # to all file gids (# = id offset)\n"
> + " --hard-dereference dereference hardlinks, add links as separate inodes\n"
> + " --ignore-mtime use build time instead of strict per-file modification time\n"
> + " --max-extent-bytes=# set maximum decompressed extent size # in bytes\n"
> + " --mount-point=X X=prefix of target fs path (default: /)\n"
> + " --preserve-mtime keep per-file modification time strictly\n"
> + " --offset=# skip # bytes at the beginning of IMAGE.\n"
> + " --root-xattr-isize=# ensure the inline xattr size of the root directory is # bytes at least\n"
> + " --aufs replace aufs special files with overlayfs metadata\n"
> + " --sort=<path,none> data sorting order for tarballs as input (default: path)\n"
> #ifdef S3EROFS_ENABLED
> - " --s3=X generate an image from S3-compatible object store\n"
> - " [,passwd_file=Y] X=endpoint, Y=s3fs-compatible password file\n"
> - " [,urlstyle=Z] S3 API calling style (Z = vhost|path) (default: vhost)\n"
> - " [,sig=<2,4>] S3 API signature version (default: 2)\n"
> - " [,region=W] W=region code in which endpoint belongs to (required for sig=4)\n"
> + " --s3=X generate an image from S3-compatible object store\n"
> + " [,passwd_file=Y] X=endpoint, Y=s3fs-compatible password file\n"
> + " [,urlstyle=Z] S3 API calling style (Z = vhost|path) (default: vhost)\n"
> + " [,sig=<2,4>] S3 API signature version (default: 2)\n"
> + " [,region=W] W=region code in which endpoint belongs to (required for sig=4)\n"
> #endif
> #ifdef OCIEROFS_ENABLED
> - " --oci=[f|i] generate a full (f) or index-only (i) image from OCI remote source\n"
> - " [,platform=X] X=platform (default: linux/amd64)\n"
> - " [,layer=#] #=layer index to extract (0-based; omit to extract all layers)\n"
> - " [,blob=Y] Y=blob digest to extract (omit to extract all layers)\n"
> - " [,username=Z] Z=username for authentication (optional)\n"
> - " [,password=W] W=password for authentication (optional)\n"
> - " [,insecure] use HTTP instead of HTTPS (optional)\n"
> + " --oci=[f|i] generate a full (f) or index-only (i) image from OCI remote source\n"
> + " [,platform=X] X=platform (default: linux/amd64)\n"
> + " [,layer=#] #=layer index to extract (0-based; omit to extract all layers)\n"
> + " [,blob=Y] Y=blob digest to extract (omit to extract all layers)\n"
> + " [,username=Z] Z=username for authentication (optional)\n"
> + " [,password=W] W=password for authentication (optional)\n"
> + " [,insecure] use HTTP instead of HTTPS (optional)\n"
> #endif
> - " --tar=X generate a full or index-only image from a tarball(-ish) source\n"
> - " (X = f|i|headerball; f=full mode, i=index mode,\n"
> - " headerball=file data is omited in the source stream)\n"
> - " --ovlfs-strip=<0,1> strip overlayfs metadata in the target image (e.g. whiteouts)\n"
> - " --quiet quiet execution (do not write anything to standard output.)\n"
> + " --tar=X generate a full or index-only image from a tarball(-ish) source\n"
> + " (X = f|i|headerball; f=full mode, i=index mode,\n"
> + " headerball=file data is omitted in the source stream)\n"
> + " --ovlfs-strip=<0,1> strip overlayfs metadata in the target image (e.g. whiteouts)\n"
> + " --quiet quiet execution (do not write anything to standard output.)\n"
> #ifndef NDEBUG
> - " --random-pclusterblks randomize pclusterblks for big pcluster (debugging only)\n"
> - " --random-algorithms randomize per-file algorithms (debugging only)\n"
> + " --random-pclusterblks randomize pclusterblks for big pcluster (debugging only)\n"
> + " --random-algorithms randomize per-file algorithms (debugging only)\n"
> #endif
> #ifdef HAVE_ZLIB
> - " --ungzip[=X] try to filter the tarball stream through gzip\n"
> - " (and optionally dump the raw stream to X together)\n"
> + " --ungzip[=X] try to filter the tarball stream through gzip\n"
> + " (and optionally dump the raw stream to X together)\n"
> #endif
> #ifdef HAVE_LIBLZMA
> - " --unxz[=X] try to filter the tarball stream through xz/lzma/lzip\n"
> - " (and optionally dump the raw stream to X together)\n"
> + " --unxz[=X] try to filter the tarball stream through xz/lzma/lzip\n"
> + " (and optionally dump the raw stream to X together)\n"
> #endif
> #ifdef HAVE_ZLIB
> - " --gzinfo[=X] generate AWS SOCI-compatible zinfo in order to support random gzip access\n"
> + " --gzinfo[=X] generate AWS SOCI-compatible zinfo in order to support random gzip access\n"
> #endif
> - " --vmdk-desc=X generate a VMDK descriptor file to merge sub-filesystems\n"
> + " --vmdk-desc=X generate a VMDK descriptor file to merge sub-filesystems\n"
> #ifdef EROFS_MT_ENABLED
> - " --workers=# set the number of worker threads to # (default: %u)\n"
> + " --workers=# set the number of worker threads to # (default: %u)\n"
> #endif
> - " --xattr-prefix=X X=extra xattr name prefix\n"
> - " --zfeature-bits=# toggle filesystem compression features according to given bits #\n"
> + " --xattr-inode-digest=X specify extended attribute name X to record inode digests\n"
> + " --xattr-prefix=X X=extra xattr name prefix\n"
> + " --zfeature-bits=# toggle filesystem compression features according to given bits #\n"
> #ifdef WITH_ANDROID
> "\n"
> "Android-specific options:\n"
> - " --product-out=X X=product_out directory\n"
> - " --fs-config-file=X X=fs_config file\n"
> + " --product-out=X X=product_out directory\n"
> + " --fs-config-file=X X=fs_config file\n"
> #endif
> #ifdef EROFS_MT_ENABLED
> , erofs_get_available_processors() /* --workers= */
> @@ -1259,16 +1261,6 @@ static int mkfs_parse_options_cfg(struct erofs_importer_params *params,
> return -EINVAL;
> }
> break;
> - case 19:
> - errno = 0;
> - opt = erofs_xattr_insert_name_prefix(optarg);
> - if (opt) {
> - erofs_err("failed to parse xattr name prefix: %s",
> - erofs_strerror(opt));
> - return opt;
> - }
> - cfg.c_extra_ea_name_prefixes = true;
> - break;
> case 20:
> mkfs_parse_tar_cfg(optarg);
> break;
> @@ -1424,6 +1416,24 @@ static int mkfs_parse_options_cfg(struct erofs_importer_params *params,
> else
> mkfscfg.inode_metazone = false;
> break;
> + case 538:
> + errno = 0;
> + opt = erofs_xattr_insert_name_prefix(optarg);
> + if (opt < 0) {
> + erofs_err("failed to parse xattr name prefix: %s",
> + erofs_strerror(opt));
> + return opt;
> + }
> + cfg.c_extra_ea_name_prefixes = true;
> + break;
> + case 539:
> + err = erofs_xattr_set_ishare_prefix(&g_sbi, optarg);
> + if (err < 0) {
> + erofs_err("failed to parse ishare name: %s",
> + erofs_strerror(err));
> + return err;
> + }
> + break;
> case 'V':
> version();
> exit(0);
> @@ -1878,9 +1888,13 @@ int main(int argc, char **argv)
> goto exit;
> }
>
> - if (cfg.c_extra_ea_name_prefixes)
> - erofs_xattr_flush_name_prefixes(&importer,
> - mkfs_plain_xattr_pfx);
> + err = erofs_xattr_flush_name_prefixes(&importer,
> + mkfs_plain_xattr_pfx);
> + if (err) {
> + erofs_err("failed to flush long xattr prefixes: %s",
> + erofs_strerror(err));
> + goto exit;
> + }
>
> root = erofs_new_inode(&g_sbi);
> if (IS_ERR(root)) {
> @@ -1888,6 +1902,14 @@ int main(int argc, char **argv)
> goto exit;
> }
> } else {
> + err = erofs_xattr_flush_name_prefixes(&importer,
> + mkfs_plain_xattr_pfx);
> + if (err) {
> + erofs_err("failed to flush long xattr prefixes: %s",
> + erofs_strerror(err));
> + goto exit;
> + }
> +
> root = erofs_rebuild_make_root(&g_sbi);
> if (IS_ERR(root)) {
> err = PTR_ERR(root);
More information about the Linux-erofs
mailing list