btrfs: replace sb::s_blocksize by fs_info::sectorsize

The block size stored in the super block is used by subsystems outside
of btrfs and it's a copy of fs_info::sectorsize. Unify that to always
use our sectorsize, with the exception of mount where we first need to
use fixed values (4K) until we read the super block and can set the
sectorsize.

Replace all uses, in most cases it's fewer pointer indirections.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

7 files changed, 11 insertions, 9 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bcd35be4b841..751e693be050 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2840,6 +2840,7 @@ static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block
 	int ret;
 
 	fs_info->sb = sb;
+	/* Temporary fixed values for block size until we read the superblock. */
 	sb->s_blocksize = BTRFS_BDEV_BLOCKSIZE;
 	sb->s_blocksize_bits = blksize_bits(BTRFS_BDEV_BLOCKSIZE);
 
@@ -3357,6 +3358,7 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
 	sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super);
 	sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE);
 
+	/* Update the values for the current filesystem. */
 	sb->s_blocksize = sectorsize;
 	sb->s_blocksize_bits = blksize_bits(sectorsize);
 	memcpy(&sb->s_uuid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index cff67d03424d..9f6ac8a26e07 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1015,7 +1015,7 @@ static int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
 	int ret = 0;
 	size_t pg_offset = 0;
 	size_t iosize;
-	size_t blocksize = inode->i_sb->s_blocksize;
+	size_t blocksize = fs_info->sectorsize;
 	struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
 
 	ret = set_page_extent_mapped(page);
@@ -2305,7 +2305,7 @@ int extent_invalidate_folio(struct extent_io_tree *tree,
 	struct extent_state *cached_state = NULL;
 	u64 start = folio_pos(folio);
 	u64 end = start + folio_size(folio) - 1;
-	size_t blocksize = folio->mapping->host->i_sb->s_blocksize;
+	size_t blocksize = btrfs_sb(folio->mapping->host->i_sb)->sectorsize;
 
 	/* This function is only called for the btree inode */
 	ASSERT(tree->owner == IO_TREE_BTREE_INODE_IO);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0fbea8505b46..ea71df398f86 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8721,7 +8721,7 @@ static int btrfs_getattr(struct mnt_idmap *idmap,
 	u64 delalloc_bytes;
 	u64 inode_bytes;
 	struct inode *inode = d_inode(path->dentry);
-	u32 blocksize = inode->i_sb->s_blocksize;
+	u32 blocksize = btrfs_sb(inode->i_sb)->sectorsize;
 	u32 bi_flags = BTRFS_I(inode)->flags;
 	u32 bi_ro_flags = BTRFS_I(inode)->ro_flags;
 
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9d1eac15e09e..8d80903e9bff 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -528,7 +528,7 @@ static noinline int btrfs_ioctl_fitrim(struct btrfs_fs_info *fs_info,
 	 * block group is in the logical address space, which can be any
 	 * sectorsize aligned bytenr in  the range [0, U64_MAX].
 	 */
-	if (range.len < fs_info->sb->s_blocksize)
+	if (range.len < fs_info->sectorsize)
 		return -EINVAL;
 
 	range.minlen = max(range.minlen, minlen);
diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c
index ae90894dc7dc..e38cb40e150c 100644
--- a/fs/btrfs/reflink.c
+++ b/fs/btrfs/reflink.c
@@ -663,7 +663,7 @@ static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len,
 				   struct inode *dst, u64 dst_loff)
 {
 	struct btrfs_fs_info *fs_info = BTRFS_I(src)->root->fs_info;
-	const u64 bs = fs_info->sb->s_blocksize;
+	const u64 bs = fs_info->sectorsize;
 	int ret;
 
 	/*
@@ -730,7 +730,7 @@ static noinline int btrfs_clone_files(struct file *file, struct file *file_src,
 	int ret;
 	int wb_ret;
 	u64 len = olen;
-	u64 bs = fs_info->sb->s_blocksize;
+	u64 bs = fs_info->sectorsize;
 
 	/*
 	 * VFS's generic_remap_file_range_prep() protects us from cloning the
@@ -796,7 +796,7 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
 {
 	struct inode *inode_in = file_inode(file_in);
 	struct inode *inode_out = file_inode(file_out);
-	u64 bs = BTRFS_I(inode_out)->root->fs_info->sb->s_blocksize;
+	u64 bs = BTRFS_I(inode_out)->root->fs_info->sectorsize;
 	u64 wb_len;
 	int ret;
 
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index e48a063ef085..e9516509b276 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6140,7 +6140,7 @@ static int send_write_or_clone(struct send_ctx *sctx,
 	int ret = 0;
 	u64 offset = key->offset;
 	u64 end;
-	u64 bs = sctx->send_root->fs_info->sb->s_blocksize;
+	u64 bs = sctx->send_root->fs_info->sectorsize;
 
 	end = min_t(u64, btrfs_file_extent_end(path), sctx->cur_inode_size);
 	if (offset >= end)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 101f786963d4..c45fdaf24cd1 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1767,7 +1767,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 		buf->f_bavail = 0;
 
 	buf->f_type = BTRFS_SUPER_MAGIC;
-	buf->f_bsize = dentry->d_sb->s_blocksize;
+	buf->f_bsize = fs_info->sectorsize;
 	buf->f_namelen = BTRFS_NAME_LEN;
 
 	/* We treat it as constant endianness (it doesn't matter _which_)