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* [PATCH v2 1/3] staging: erofs: introduce EFSCORRUPTED and more logs
@ 2019-08-14 10:37 Gao Xiang
  2019-08-14 10:37 ` [PATCH v2 2/3] staging: erofs: differentiate unsupported on-disk format Gao Xiang
  2019-08-14 10:37 ` [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP Gao Xiang
  0 siblings, 2 replies; 4+ messages in thread
From: Gao Xiang @ 2019-08-14 10:37 UTC (permalink / raw)
  To: Chao Yu, Pavel Machek, Greg Kroah-Hartman, devel, linux-fsdevel
  Cc: LKML, linux-erofs, Chao Yu, Miao Xie, weidu.du, Fang Wei, Gao Xiang

Previously, EROFS uses EIO to indicate that filesystem
is corrupted as well. However, as Pavel said [1], other
filesystems tend to use EUCLEAN(EFSCORRUPTED) instead,
let's follow what others do right now.

Also, add some more prints to the syslog.

[1] https://lore.kernel.org/lkml/20190813114821.GB11559@amd/

Suggested-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
change log from v1:
 - update the commit message;

This patchset has dependency on the previous patchset yesterday
 https://lore.kernel.org/lkml/20190813023054.73126-1-gaoxiang25@huawei.com/

Thanks,
Gao Xiang

 drivers/staging/erofs/data.c     |  6 ++++--
 drivers/staging/erofs/dir.c      | 15 ++++++++-------
 drivers/staging/erofs/inode.c    | 17 ++++++++++++-----
 drivers/staging/erofs/internal.h |  2 ++
 drivers/staging/erofs/namei.c    |  6 ++++--
 drivers/staging/erofs/xattr.c    |  5 +++--
 drivers/staging/erofs/zmap.c     |  5 +++--
 7 files changed, 36 insertions(+), 20 deletions(-)

diff --git a/drivers/staging/erofs/data.c b/drivers/staging/erofs/data.c
index 4cdb743c8b8d..72c4b4c5296b 100644
--- a/drivers/staging/erofs/data.c
+++ b/drivers/staging/erofs/data.c
@@ -143,10 +143,12 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
 			vi->xattr_isize + erofs_blkoff(map->m_la);
 		map->m_plen = inode->i_size - offset;
 
-		/* inline data should locate in one meta block */
+		/* inline data should be located in one meta block */
 		if (erofs_blkoff(map->m_pa) + map->m_plen > PAGE_SIZE) {
+			errln("inline data cross block boundary @ nid %llu",
+			      vi->nid);
 			DBG_BUGON(1);
-			err = -EIO;
+			err = -EFSCORRUPTED;
 			goto err_out;
 		}
 
diff --git a/drivers/staging/erofs/dir.c b/drivers/staging/erofs/dir.c
index 2fbfc4935077..01efc96e1212 100644
--- a/drivers/staging/erofs/dir.c
+++ b/drivers/staging/erofs/dir.c
@@ -34,7 +34,7 @@ static void debug_one_dentry(unsigned char d_type, const char *de_name,
 #endif
 }
 
-static int erofs_fill_dentries(struct dir_context *ctx,
+static int erofs_fill_dentries(struct inode *dir, struct dir_context *ctx,
 			       void *dentry_blk, unsigned int *ofs,
 			       unsigned int nameoff, unsigned int maxsize)
 {
@@ -63,8 +63,9 @@ static int erofs_fill_dentries(struct dir_context *ctx,
 		/* a corrupted entry is found */
 		if (unlikely(nameoff + de_namelen > maxsize ||
 			     de_namelen > EROFS_NAME_LEN)) {
+			errln("bogus dirent @ nid %llu", EROFS_V(dir)->nid);
 			DBG_BUGON(1);
-			return -EIO;
+			return -EFSCORRUPTED;
 		}
 
 		debug_one_dentry(d_type, de_name, de_namelen);
@@ -104,10 +105,9 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
 
 		if (unlikely(nameoff < sizeof(struct erofs_dirent) ||
 			     nameoff >= PAGE_SIZE)) {
-			errln("%s, invalid de[0].nameoff %u",
-			      __func__, nameoff);
-
-			err = -EIO;
+			errln("%s, invalid de[0].nameoff %u @ nid %llu",
+			      __func__, nameoff, EROFS_V(dir)->nid);
+			err = -EFSCORRUPTED;
 			goto skip_this;
 		}
 
@@ -123,7 +123,8 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
 				goto skip_this;
 		}
 
-		err = erofs_fill_dentries(ctx, de, &ofs, nameoff, maxsize);
+		err = erofs_fill_dentries(dir, ctx, de, &ofs,
+					  nameoff, maxsize);
 skip_this:
 		kunmap(dentry_page);
 
diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
index 286729143365..461fd4213ce7 100644
--- a/drivers/staging/erofs/inode.c
+++ b/drivers/staging/erofs/inode.c
@@ -43,7 +43,7 @@ static int read_inode(struct inode *inode, void *data)
 		else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
 			inode->i_rdev = 0;
 		else
-			return -EIO;
+			goto bogusimode;
 
 		i_uid_write(inode, le32_to_cpu(v2->i_uid));
 		i_gid_write(inode, le32_to_cpu(v2->i_gid));
@@ -76,7 +76,7 @@ static int read_inode(struct inode *inode, void *data)
 		else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
 			inode->i_rdev = 0;
 		else
-			return -EIO;
+			goto bogusimode;
 
 		i_uid_write(inode, le16_to_cpu(v1->i_uid));
 		i_gid_write(inode, le16_to_cpu(v1->i_gid));
@@ -104,6 +104,11 @@ static int read_inode(struct inode *inode, void *data)
 	else
 		inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK;
 	return 0;
+
+bogusimode:
+	errln("bogus i_mode (%o) @ nid %llu", inode->i_mode, vi->nid);
+	DBG_BUGON(1);
+	return -EFSCORRUPTED;
 }
 
 /*
@@ -137,9 +142,11 @@ static int fill_inline_data(struct inode *inode, void *data,
 
 		/* inline symlink data shouldn't across page boundary as well */
 		if (unlikely(m_pofs + inode->i_size > PAGE_SIZE)) {
-			DBG_BUGON(1);
 			kfree(lnk);
-			return -EIO;
+			errln("inline data cross block boundary @ nid %llu",
+			      vi->nid);
+			DBG_BUGON(1);
+			return -EFSCORRUPTED;
 		}
 
 		/* get in-page inline data */
@@ -200,7 +207,7 @@ static int fill_inode(struct inode *inode, int isdir)
 			init_special_inode(inode, inode->i_mode, inode->i_rdev);
 			goto out_unlock;
 		} else {
-			err = -EIO;
+			err = -EFSCORRUPTED;
 			goto out_unlock;
 		}
 
diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 4ce5991c381f..12f737cbc0c0 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -548,5 +548,7 @@ static inline int z_erofs_init_zip_subsystem(void) { return 0; }
 static inline void z_erofs_exit_zip_subsystem(void) {}
 #endif	/* !CONFIG_EROFS_FS_ZIP */
 
+#define EFSCORRUPTED    EUCLEAN         /* Filesystem is corrupted */
+
 #endif	/* __EROFS_INTERNAL_H */
 
diff --git a/drivers/staging/erofs/namei.c b/drivers/staging/erofs/namei.c
index 8e06526da023..c0963f5a2d22 100644
--- a/drivers/staging/erofs/namei.c
+++ b/drivers/staging/erofs/namei.c
@@ -116,10 +116,12 @@ static struct page *find_target_block_classic(struct inode *dir,
 			struct erofs_qstr dname;
 
 			if (unlikely(!ndirents)) {
-				DBG_BUGON(1);
 				kunmap_atomic(de);
 				put_page(page);
-				page = ERR_PTR(-EIO);
+				errln("corrupted dir block %d @ nid %llu",
+				      mid, EROFS_V(dir)->nid);
+				DBG_BUGON(1);
+				page = ERR_PTR(-EFSCORRUPTED);
 				goto out;
 			}
 
diff --git a/drivers/staging/erofs/xattr.c b/drivers/staging/erofs/xattr.c
index 289c7850ec96..c5bfc9be412f 100644
--- a/drivers/staging/erofs/xattr.c
+++ b/drivers/staging/erofs/xattr.c
@@ -75,8 +75,9 @@ static int init_inode_xattrs(struct inode *inode)
 		goto out_unlock;
 	} else if (vi->xattr_isize < sizeof(struct erofs_xattr_ibody_header)) {
 		if (unlikely(vi->xattr_isize)) {
+			errln("bogus xattr ibody @ nid %llu", vi->nid);
 			DBG_BUGON(1);
-			ret = -EIO;
+			ret = -EFSCORRUPTED;
 			goto out_unlock;	/* xattr ondisk layout error */
 		}
 		ret = -ENOATTR;
@@ -237,7 +238,7 @@ static int xattr_foreach(struct xattr_iter *it,
 		/* xattr on-disk corruption: xattr entry beyond xattr_isize */
 		if (unlikely(*tlimit < entry_sz)) {
 			DBG_BUGON(1);
-			return -EIO;
+			return -EFSCORRUPTED;
 		}
 		*tlimit -= entry_sz;
 	}
diff --git a/drivers/staging/erofs/zmap.c b/drivers/staging/erofs/zmap.c
index aeed5c674d9e..16b3625604f4 100644
--- a/drivers/staging/erofs/zmap.c
+++ b/drivers/staging/erofs/zmap.c
@@ -338,8 +338,9 @@ static int vle_extent_lookback(struct z_erofs_maprecorder *m,
 	int err;
 
 	if (lcn < lookback_distance) {
+		errln("bogus lookback distance @ nid %llu", vi->nid);
 		DBG_BUGON(1);
-		return -EIO;
+		return -EFSCORRUPTED;
 	}
 
 	/* load extent head logical cluster if needed */
@@ -419,7 +420,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
 		if (unlikely(!m.lcn)) {
 			errln("invalid logical cluster 0 at nid %llu",
 			      vi->nid);
-			err = -EIO;
+			err = -EFSCORRUPTED;
 			goto unmap_out;
 		}
 		end = (m.lcn << lclusterbits) | m.clusterofs;
-- 
2.17.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH v2 2/3] staging: erofs: differentiate unsupported on-disk format
  2019-08-14 10:37 [PATCH v2 1/3] staging: erofs: introduce EFSCORRUPTED and more logs Gao Xiang
@ 2019-08-14 10:37 ` Gao Xiang
  2019-08-14 10:37 ` [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP Gao Xiang
  1 sibling, 0 replies; 4+ messages in thread
From: Gao Xiang @ 2019-08-14 10:37 UTC (permalink / raw)
  To: Chao Yu, Pavel Machek, Greg Kroah-Hartman, devel, linux-fsdevel
  Cc: LKML, linux-erofs, Chao Yu, Miao Xie, weidu.du, Fang Wei, Gao Xiang

For some specific fields, use EOPNOTSUPP instead of EIO
for values which look sane but aren't supported right now.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
change log from v1:
 - use EOPNOTSUPP rather than ENOTSUPP pointed by Chao;

 drivers/staging/erofs/inode.c | 4 ++--
 drivers/staging/erofs/zmap.c  | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
index 461fd4213ce7..c8f3ded17583 100644
--- a/drivers/staging/erofs/inode.c
+++ b/drivers/staging/erofs/inode.c
@@ -24,7 +24,7 @@ static int read_inode(struct inode *inode, void *data)
 		errln("unsupported data mapping %u of nid %llu",
 		      vi->datamode, vi->nid);
 		DBG_BUGON(1);
-		return -EIO;
+		return -EOPNOTSUPP;
 	}
 
 	if (__inode_version(advise) == EROFS_INODE_LAYOUT_V2) {
@@ -95,7 +95,7 @@ static int read_inode(struct inode *inode, void *data)
 		errln("unsupported on-disk inode version %u of nid %llu",
 		      __inode_version(advise), vi->nid);
 		DBG_BUGON(1);
-		return -EIO;
+		return -EOPNOTSUPP;
 	}
 
 	if (!nblks)
diff --git a/drivers/staging/erofs/zmap.c b/drivers/staging/erofs/zmap.c
index 16b3625604f4..5551e615e8ea 100644
--- a/drivers/staging/erofs/zmap.c
+++ b/drivers/staging/erofs/zmap.c
@@ -178,7 +178,7 @@ static int vle_legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
 		break;
 	default:
 		DBG_BUGON(1);
-		return -EIO;
+		return -EOPNOTSUPP;
 	}
 	m->type = type;
 	return 0;
@@ -362,7 +362,7 @@ static int vle_extent_lookback(struct z_erofs_maprecorder *m,
 		errln("unknown type %u at lcn %lu of nid %llu",
 		      m->type, lcn, vi->nid);
 		DBG_BUGON(1);
-		return -EIO;
+		return -EOPNOTSUPP;
 	}
 	return 0;
 }
@@ -436,7 +436,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
 	default:
 		errln("unknown type %u at offset %llu of nid %llu",
 		      m.type, ofs, vi->nid);
-		err = -EIO;
+		err = -EOPNOTSUPP;
 		goto unmap_out;
 	}
 
-- 
2.17.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP
  2019-08-14 10:37 [PATCH v2 1/3] staging: erofs: introduce EFSCORRUPTED and more logs Gao Xiang
  2019-08-14 10:37 ` [PATCH v2 2/3] staging: erofs: differentiate unsupported on-disk format Gao Xiang
@ 2019-08-14 10:37 ` Gao Xiang
  2019-08-15  1:31   ` Chao Yu
  1 sibling, 1 reply; 4+ messages in thread
From: Gao Xiang @ 2019-08-14 10:37 UTC (permalink / raw)
  To: Chao Yu, Pavel Machek, Greg Kroah-Hartman, devel, linux-fsdevel
  Cc: LKML, linux-erofs, Chao Yu, Miao Xie, weidu.du, Fang Wei, Gao Xiang

As Chao pointed out [1], ENOTSUPP is used for NFS
protocol only, we should use EOPNOTSUPP instead...

[1] https://lore.kernel.org/lkml/108ee2f9-75dd-b8ab-8da7-b81c17bafbf6@huawei.com/

Reported-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
 drivers/staging/erofs/decompressor.c | 2 +-
 drivers/staging/erofs/internal.h     | 6 +++---
 drivers/staging/erofs/xattr.c        | 2 +-
 drivers/staging/erofs/xattr.h        | 4 ++--
 drivers/staging/erofs/zmap.c         | 8 ++++----
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/erofs/decompressor.c b/drivers/staging/erofs/decompressor.c
index 5361a2bbedb6..32a811ac704a 100644
--- a/drivers/staging/erofs/decompressor.c
+++ b/drivers/staging/erofs/decompressor.c
@@ -124,7 +124,7 @@ static int lz4_decompress(struct z_erofs_decompress_req *rq, u8 *out)
 	int ret;
 
 	if (rq->inputsize > PAGE_SIZE)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	src = kmap_atomic(*rq->in);
 	inputmargin = 0;
diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 12f737cbc0c0..0e8d58546c52 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -403,12 +403,12 @@ int z_erofs_map_blocks_iter(struct inode *inode,
 			    struct erofs_map_blocks *map,
 			    int flags);
 #else
-static inline int z_erofs_fill_inode(struct inode *inode) { return -ENOTSUPP; }
+static inline int z_erofs_fill_inode(struct inode *inode) { return -EOPNOTSUPP; }
 static inline int z_erofs_map_blocks_iter(struct inode *inode,
 					  struct erofs_map_blocks *map,
 					  int flags)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 #endif	/* !CONFIG_EROFS_FS_ZIP */
 
@@ -516,7 +516,7 @@ void *erofs_get_pcpubuf(unsigned int pagenr);
 #else
 static inline void *erofs_get_pcpubuf(unsigned int pagenr)
 {
-	return ERR_PTR(-ENOTSUPP);
+	return ERR_PTR(-EOPNOTSUPP);
 }
 
 #define erofs_put_pcpubuf(buf) do {} while (0)
diff --git a/drivers/staging/erofs/xattr.c b/drivers/staging/erofs/xattr.c
index c5bfc9be412f..e7e5840e3f9d 100644
--- a/drivers/staging/erofs/xattr.c
+++ b/drivers/staging/erofs/xattr.c
@@ -71,7 +71,7 @@ static int init_inode_xattrs(struct inode *inode)
 	if (vi->xattr_isize == sizeof(struct erofs_xattr_ibody_header)) {
 		errln("xattr_isize %d of nid %llu is not supported yet",
 		      vi->xattr_isize, vi->nid);
-		ret = -ENOTSUPP;
+		ret = -EOPNOTSUPP;
 		goto out_unlock;
 	} else if (vi->xattr_isize < sizeof(struct erofs_xattr_ibody_header)) {
 		if (unlikely(vi->xattr_isize)) {
diff --git a/drivers/staging/erofs/xattr.h b/drivers/staging/erofs/xattr.h
index 63cc87e3d3f4..e20249647541 100644
--- a/drivers/staging/erofs/xattr.h
+++ b/drivers/staging/erofs/xattr.h
@@ -74,13 +74,13 @@ static inline int erofs_getxattr(struct inode *inode, int index,
 				 const char *name, void *buffer,
 				 size_t buffer_size)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 static inline ssize_t erofs_listxattr(struct dentry *dentry,
 				      char *buffer, size_t buffer_size)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 #endif	/* !CONFIG_EROFS_FS_XATTR */
 
diff --git a/drivers/staging/erofs/zmap.c b/drivers/staging/erofs/zmap.c
index 5551e615e8ea..b61b9b5950ac 100644
--- a/drivers/staging/erofs/zmap.c
+++ b/drivers/staging/erofs/zmap.c
@@ -68,7 +68,7 @@ static int fill_inode_lazy(struct inode *inode)
 	if (vi->z_algorithmtype[0] >= Z_EROFS_COMPRESSION_MAX) {
 		errln("unknown compression format %u for nid %llu, please upgrade kernel",
 		      vi->z_algorithmtype[0], vi->nid);
-		err = -ENOTSUPP;
+		err = -EOPNOTSUPP;
 		goto unmap_done;
 	}
 
@@ -79,7 +79,7 @@ static int fill_inode_lazy(struct inode *inode)
 	if (vi->z_physical_clusterbits[0] != LOG_BLOCK_SIZE) {
 		errln("unsupported physical clusterbits %u for nid %llu, please upgrade kernel",
 		      vi->z_physical_clusterbits[0], vi->nid);
-		err = -ENOTSUPP;
+		err = -EOPNOTSUPP;
 		goto unmap_done;
 	}
 
@@ -211,7 +211,7 @@ static int unpack_compacted_index(struct z_erofs_maprecorder *m,
 	else if (1 << amortizedshift == 2 && lclusterbits == 12)
 		vcnt = 16;
 	else
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	encodebits = ((vcnt << amortizedshift) - sizeof(__le32)) * 8 / vcnt;
 	base = round_down(eofs, vcnt << amortizedshift);
@@ -275,7 +275,7 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
 	int err;
 
 	if (lclusterbits != 12)
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
 	if (lcn >= totalidx)
 		return -EINVAL;
-- 
2.17.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP
  2019-08-14 10:37 ` [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP Gao Xiang
@ 2019-08-15  1:31   ` Chao Yu
  0 siblings, 0 replies; 4+ messages in thread
From: Chao Yu @ 2019-08-15  1:31 UTC (permalink / raw)
  To: Gao Xiang, Pavel Machek, Greg Kroah-Hartman, devel, linux-fsdevel
  Cc: LKML, linux-erofs, Chao Yu, Miao Xie, weidu.du, Fang Wei

On 2019/8/14 18:37, Gao Xiang wrote:
> As Chao pointed out [1], ENOTSUPP is used for NFS
> protocol only, we should use EOPNOTSUPP instead...
> 
> [1] https://lore.kernel.org/lkml/108ee2f9-75dd-b8ab-8da7-b81c17bafbf6@huawei.com/
> 
> Reported-by: Chao Yu <yuchao0@huawei.com>
> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, back to index

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-14 10:37 [PATCH v2 1/3] staging: erofs: introduce EFSCORRUPTED and more logs Gao Xiang
2019-08-14 10:37 ` [PATCH v2 2/3] staging: erofs: differentiate unsupported on-disk format Gao Xiang
2019-08-14 10:37 ` [PATCH v2 3/3] staging: erofs: correct all misused ENOTSUPP Gao Xiang
2019-08-15  1:31   ` Chao Yu

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