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    Subject[PATCH v6 06/24] erofs: support special inode
    Date
    This patch adds to support special inode, such as
    block dev, char, socket, pipe inode.

    Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
    ---
    fs/erofs/inode.c | 27 +++++++++++++++++++++++++--
    1 file changed, 25 insertions(+), 2 deletions(-)

    diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
    index b6ea997bc4ae..637bf6e4de44 100644
    --- a/fs/erofs/inode.c
    +++ b/fs/erofs/inode.c
    @@ -34,7 +34,16 @@ static int read_inode(struct inode *inode, void *data)
    vi->xattr_isize = ondisk_xattr_ibody_size(v2->i_xattr_icount);

    inode->i_mode = le16_to_cpu(v2->i_mode);
    - vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
    + if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
    + S_ISLNK(inode->i_mode))
    + vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
    + else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
    + inode->i_rdev =
    + new_decode_dev(le32_to_cpu(v2->i_u.rdev));
    + else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
    + inode->i_rdev = 0;
    + else
    + return -EIO;

    i_uid_write(inode, le32_to_cpu(v2->i_uid));
    i_gid_write(inode, le32_to_cpu(v2->i_gid));
    @@ -58,7 +67,16 @@ static int read_inode(struct inode *inode, void *data)
    vi->xattr_isize = ondisk_xattr_ibody_size(v1->i_xattr_icount);

    inode->i_mode = le16_to_cpu(v1->i_mode);
    - vi->raw_blkaddr = le32_to_cpu(v1->i_u.raw_blkaddr);
    + if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
    + S_ISLNK(inode->i_mode))
    + vi->raw_blkaddr = le32_to_cpu(v1->i_u.raw_blkaddr);
    + else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
    + inode->i_rdev =
    + new_decode_dev(le32_to_cpu(v1->i_u.rdev));
    + else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
    + inode->i_rdev = 0;
    + else
    + return -EIO;

    i_uid_write(inode, le16_to_cpu(v1->i_uid));
    i_gid_write(inode, le16_to_cpu(v1->i_gid));
    @@ -176,6 +194,11 @@ static int fill_inode(struct inode *inode, int isdir)
    /* by default, page_get_link is used for symlink */
    inode->i_op = &erofs_symlink_iops;
    inode_nohighmem(inode);
    + } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
    + S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
    + inode->i_op = &erofs_generic_iops;
    + init_special_inode(inode, inode->i_mode, inode->i_rdev);
    + goto out_unlock;
    } else {
    err = -EIO;
    goto out_unlock;
    --
    2.17.1
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