Merge tag 'erofs-for-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
 "This cycle mainly addresses an issue out of some extended inode with
  designated location, which are not generated by current mkfs but need
  to handled at runtime anyway. The others are quite trivial ones.

   - use HTTPS links instead of insecure HTTP ones;

   - fix crossing page boundary on specific extended inodes;

   - remove useless WQ_CPU_INTENSIVE flag for unbound wq;

   - minor cleanup"

* tag 'erofs-for-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: remove WQ_CPU_INTENSIVE flag from unbound wq's
  erofs: fold in used-once helper erofs_workgroup_unfreeze_final()
  erofs: fix extended inode could cross boundary
  erofs: Replace HTTP links with HTTPS ones

16 files changed, 100 insertions, 71 deletions

diff --git a/fs/erofs/compress.h b/fs/erofs/compress.h
index 07d279fd5d67..3d452443c545 100644
--- a/fs/erofs/compress.h
+++ b/fs/erofs/compress.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2019 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_FS_COMPRESS_H
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index d0542151e8c4..459ecb42cbd3 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "internal.h"
diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 7628816f2453..cbadbf55c6c2 100644
--- a/fs/erofs/decompressor.c
+++ b/fs/erofs/decompressor.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2019 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "compress.h"
diff --git a/fs/erofs/dir.c b/fs/erofs/dir.c
index d28c623dfef9..2776bb832127 100644
--- a/fs/erofs/dir.c
+++ b/fs/erofs/dir.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "internal.h"
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h
index 385fa49c7749..9ad1615f4474 100644
--- a/fs/erofs/erofs_fs.h
+++ b/fs/erofs/erofs_fs.h
@@ -3,7 +3,7 @@
  * EROFS (Enhanced ROM File System) on-disk format definition
  *
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_FS_H
diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index 7dd4bbe9674f..139d0bed42f8 100644
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -1,38 +1,87 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "xattr.h"
 
 #include <trace/events/erofs.h>
 
-/* no locking */
-static int erofs_read_inode(struct inode *inode, void *data)
+/*
+ * if inode is successfully read, return its inode page (or sometimes
+ * the inode payload page if it's an extended inode) in order to fill
+ * inline data if possible.
+ */
+static struct page *erofs_read_inode(struct inode *inode,
+				     unsigned int *ofs)
 {
+	struct super_block *sb = inode->i_sb;
+	struct erofs_sb_info *sbi = EROFS_SB(sb);
 	struct erofs_inode *vi = EROFS_I(inode);
-	struct erofs_inode_compact *dic = data;
-	struct erofs_inode_extended *die;
+	const erofs_off_t inode_loc = iloc(sbi, vi->nid);
+
+	erofs_blk_t blkaddr, nblks = 0;
+	struct page *page;
+	struct erofs_inode_compact *dic;
+	struct erofs_inode_extended *die, *copied = NULL;
+	unsigned int ifmt;
+	int err;
 
-	const unsigned int ifmt = le16_to_cpu(dic->i_format);
-	struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
-	erofs_blk_t nblks = 0;
+	blkaddr = erofs_blknr(inode_loc);
+	*ofs = erofs_blkoff(inode_loc);
 
-	vi->datalayout = erofs_inode_datalayout(ifmt);
+	erofs_dbg("%s, reading inode nid %llu at %u of blkaddr %u",
+		  __func__, vi->nid, *ofs, blkaddr);
+
+	page = erofs_get_meta_page(sb, blkaddr);
+	if (IS_ERR(page)) {
+		erofs_err(sb, "failed to get inode (nid: %llu) page, err %ld",
+			  vi->nid, PTR_ERR(page));
+		return page;
+	}
 
+	dic = page_address(page) + *ofs;
+	ifmt = le16_to_cpu(dic->i_format);
+
+	vi->datalayout = erofs_inode_datalayout(ifmt);
 	if (vi->datalayout >= EROFS_INODE_DATALAYOUT_MAX) {
 		erofs_err(inode->i_sb, "unsupported datalayout %u of nid %llu",
 			  vi->datalayout, vi->nid);
-		DBG_BUGON(1);
-		return -EOPNOTSUPP;
+		err = -EOPNOTSUPP;
+		goto err_out;
 	}
 
 	switch (erofs_inode_version(ifmt)) {
 	case EROFS_INODE_LAYOUT_EXTENDED:
-		die = data;
-
 		vi->inode_isize = sizeof(struct erofs_inode_extended);
+		/* check if the inode acrosses page boundary */
+		if (*ofs + vi->inode_isize <= PAGE_SIZE) {
+			*ofs += vi->inode_isize;
+			die = (struct erofs_inode_extended *)dic;
+		} else {
+			const unsigned int gotten = PAGE_SIZE - *ofs;
+
+			copied = kmalloc(vi->inode_isize, GFP_NOFS);
+			if (!copied) {
+				err = -ENOMEM;
+				goto err_out;
+			}
+			memcpy(copied, dic, gotten);
+			unlock_page(page);
+			put_page(page);
+
+			page = erofs_get_meta_page(sb, blkaddr + 1);
+			if (IS_ERR(page)) {
+				erofs_err(sb, "failed to get inode payload page (nid: %llu), err %ld",
+					  vi->nid, PTR_ERR(page));
+				kfree(copied);
+				return page;
+			}
+			*ofs = vi->inode_isize - gotten;
+			memcpy((u8 *)copied + gotten, page_address(page), *ofs);
+			die = copied;
+		}
 		vi->xattr_isize = erofs_xattr_ibody_size(die->i_xattr_icount);
 
 		inode->i_mode = le16_to_cpu(die->i_mode);
@@ -69,9 +118,12 @@ static int erofs_read_inode(struct inode *inode, void *data)
 		/* total blocks for compressed files */
 		if (erofs_inode_is_data_compressed(vi->datalayout))
 			nblks = le32_to_cpu(die->i_u.compressed_blocks);
+
+		kfree(copied);
 		break;
 	case EROFS_INODE_LAYOUT_COMPACT:
 		vi->inode_isize = sizeof(struct erofs_inode_compact);
+		*ofs += vi->inode_isize;
 		vi->xattr_isize = erofs_xattr_ibody_size(dic->i_xattr_icount);
 
 		inode->i_mode = le16_to_cpu(dic->i_mode);
@@ -111,8 +163,8 @@ static int erofs_read_inode(struct inode *inode, void *data)
 		erofs_err(inode->i_sb,
 			  "unsupported on-disk inode version %u of nid %llu",
 			  erofs_inode_version(ifmt), vi->nid);
-		DBG_BUGON(1);
-		return -EOPNOTSUPP;
+		err = -EOPNOTSUPP;
+		goto err_out;
 	}
 
 	if (!nblks)
@@ -120,13 +172,18 @@ static int erofs_read_inode(struct inode *inode, void *data)
 		inode->i_blocks = roundup(inode->i_size, EROFS_BLKSIZ) >> 9;
 	else
 		inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK;
-	return 0;
+	return page;
 
 bogusimode:
 	erofs_err(inode->i_sb, "bogus i_mode (%o) @ nid %llu",
 		  inode->i_mode, vi->nid);
+	err = -EFSCORRUPTED;
+err_out:
 	DBG_BUGON(1);
-	return -EFSCORRUPTED;
+	kfree(copied);
+	unlock_page(page);
+	put_page(page);
+	return ERR_PTR(err);
 }
 
 static int erofs_fill_symlink(struct inode *inode, void *data,
@@ -146,7 +203,7 @@ static int erofs_fill_symlink(struct inode *inode, void *data,
 	if (!lnk)
 		return -ENOMEM;
 
-	m_pofs += vi->inode_isize + vi->xattr_isize;
+	m_pofs += vi->xattr_isize;
 	/* inline symlink data shouldn't cross page boundary as well */
 	if (m_pofs + inode->i_size > PAGE_SIZE) {
 		kfree(lnk);
@@ -167,37 +224,17 @@ static int erofs_fill_symlink(struct inode *inode, void *data,
 
 static int erofs_fill_inode(struct inode *inode, int isdir)
 {
-	struct super_block *sb = inode->i_sb;
 	struct erofs_inode *vi = EROFS_I(inode);
 	struct page *page;
-	void *data;
-	int err;
-	erofs_blk_t blkaddr;
 	unsigned int ofs;
-	erofs_off_t inode_loc;
+	int err = 0;
 
 	trace_erofs_fill_inode(inode, isdir);
-	inode_loc = iloc(EROFS_SB(sb), vi->nid);
-	blkaddr = erofs_blknr(inode_loc);
-	ofs = erofs_blkoff(inode_loc);
-
-	erofs_dbg("%s, reading inode nid %llu at %u of blkaddr %u",
-		  __func__, vi->nid, ofs, blkaddr);
 
-	page = erofs_get_meta_page(sb, blkaddr);
-
-	if (IS_ERR(page)) {
-		erofs_err(sb, "failed to get inode (nid: %llu) page, err %ld",
-			  vi->nid, PTR_ERR(page));
+	/* read inode base data from disk */
+	page = erofs_read_inode(inode, &ofs);
+	if (IS_ERR(page))
 		return PTR_ERR(page);
-	}
-
-	DBG_BUGON(!PageUptodate(page));
-	data = page_address(page);
-
-	err = erofs_read_inode(inode, data + ofs);
-	if (err)
-		goto out_unlock;
 
 	/* setup the new inode */
 	switch (inode->i_mode & S_IFMT) {
@@ -210,7 +247,7 @@ static int erofs_fill_inode(struct inode *inode, int isdir)
 		inode->i_fop = &erofs_dir_fops;
 		break;
 	case S_IFLNK:
-		err = erofs_fill_symlink(inode, data, ofs);
+		err = erofs_fill_symlink(inode, page_address(page), ofs);
 		if (err)
 			goto out_unlock;
 		inode_nohighmem(inode);
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 1c077b7bb43d..67a7ec945686 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_INTERNAL_H
diff --git a/fs/erofs/namei.c b/fs/erofs/namei.c
index 52f201e03c62..5f8cc7346c69 100644
--- a/fs/erofs/namei.c
+++ b/fs/erofs/namei.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "xattr.h"
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 7a13ffb07c23..ddaa516c008a 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include <linux/module.h>
diff --git a/fs/erofs/utils.c b/fs/erofs/utils.c
index 52d0be10f1aa..de9986d2f82f 100644
--- a/fs/erofs/utils.c
+++ b/fs/erofs/utils.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "internal.h"
@@ -127,12 +127,6 @@ int erofs_workgroup_put(struct erofs_workgroup *grp)
 	return count;
 }
 
-static void erofs_workgroup_unfreeze_final(struct erofs_workgroup *grp)
-{
-	erofs_workgroup_unfreeze(grp, 0);
-	__erofs_workgroup_free(grp);
-}
-
 static bool erofs_try_to_release_workgroup(struct erofs_sb_info *sbi,
 					   struct erofs_workgroup *grp)
 {
@@ -162,11 +156,9 @@ static bool erofs_try_to_release_workgroup(struct erofs_sb_info *sbi,
 	 */
 	DBG_BUGON(xa_erase(&sbi->managed_pslots, grp->index) != grp);
 
-	/*
-	 * If managed cache is on, last refcount should indicate
-	 * the related workstation.
-	 */
-	erofs_workgroup_unfreeze_final(grp);
+	/* last refcount should be connected with its managed pslot.  */
+	erofs_workgroup_unfreeze(grp, 0);
+	__erofs_workgroup_free(grp);
 	return true;
 }
 
diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index 87e437e7b34f..c8c381eadcd6 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include <linux/security.h>
diff --git a/fs/erofs/xattr.h b/fs/erofs/xattr.h
index e4e5093f012c..815304bd335f 100644
--- a/fs/erofs/xattr.h
+++ b/fs/erofs/xattr.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_XATTR_H
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 24a26aaf847f..6c939def00f9 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "zdata.h"
@@ -43,13 +43,13 @@ void z_erofs_exit_zip_subsystem(void)
 static inline int z_erofs_init_workqueue(void)
 {
 	const unsigned int onlinecpus = num_possible_cpus();
-	const unsigned int flags = WQ_UNBOUND | WQ_HIGHPRI | WQ_CPU_INTENSIVE;
 
 	/*
 	 * no need to spawn too many threads, limiting threads could minimum
 	 * scheduling overhead, perhaps per-CPU threads should be better?
 	 */
-	z_erofs_workqueue = alloc_workqueue("erofs_unzipd", flags,
+	z_erofs_workqueue = alloc_workqueue("erofs_unzipd",
+					    WQ_UNBOUND | WQ_HIGHPRI,
 					    onlinecpus + onlinecpus / 4);
 	return z_erofs_workqueue ? 0 : -ENOMEM;
 }
diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h
index 9b66c28b3ae9..68c9b29fc0ca 100644
--- a/fs/erofs/zdata.h
+++ b/fs/erofs/zdata.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_FS_ZDATA_H
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index 736db3a4cdef..7d40d78ea864 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2018-2019 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #include "internal.h"
diff --git a/fs/erofs/zpvec.h b/fs/erofs/zpvec.h
index 58556903aa94..1d67cbd38704 100644
--- a/fs/erofs/zpvec.h
+++ b/fs/erofs/zpvec.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2018 HUAWEI, Inc.
- *             http://www.huawei.com/
+ *             https://www.huawei.com/
  * Created by Gao Xiang <gaoxiang25@huawei.com>
  */
 #ifndef __EROFS_FS_ZPVEC_H