On 2019/5/28 10:31, Gao Xiang wrote:
> statx() has already been supported in commit a528d35e8bfc
> ("statx: Add a system call to make enhanced file info available"),
> user programs can get more useful attributes.
>
> Signed-off-by: Gao Xiang <gaoxian...@huawei.com>
> ---
> drivers/staging/erofs/inode.c | 18 ++++++++++++++++++
> drivers/staging/erofs/internal.h | 2 ++
> drivers/staging/erofs/namei.c | 1 +
> 3 files changed, 21 insertions(+)
>
> diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
> index c7d3b815a798..8da144943ed6 100644
> --- a/drivers/staging/erofs/inode.c
> +++ b/drivers/staging/erofs/inode.c
> @@ -285,7 +285,23 @@ struct inode *erofs_iget(struct super_block *sb,
> return inode;
> }
>
> +int erofs_getattr(const struct path *path, struct kstat *stat,
> + u32 request_mask, unsigned int query_flags)
> +{
> + struct inode *const inode = d_inode(path->dentry);
> + struct erofs_vnode *const vi = EROFS_V(inode);
> +
> + if (vi->data_mapping_mode == EROFS_INODE_LAYOUT_COMPRESSION)
> + stat->attributes |= STATX_ATTR_COMPRESSED;
> +
> + stat->attributes |= STATX_ATTR_IMMUTABLE;
Xiang,
Should update stat->attributes_mask as well to indicate all erofs supported
attributes bits.
Thanks,
> +
> + generic_fillattr(inode, stat);
> + return 0;
> +}
> +
> const struct inode_operations erofs_generic_iops = {
> + .getattr = erofs_getattr,
> #ifdef CONFIG_EROFS_FS_XATTR
> .listxattr = erofs_listxattr,
> #endif
> @@ -294,6 +310,7 @@ const struct inode_operations erofs_generic_iops = {
>
> const struct inode_operations erofs_symlink_iops = {
> .get_link = page_get_link,
> + .getattr = erofs_getattr,
> #ifdef CONFIG_EROFS_FS_XATTR
> .listxattr = erofs_listxattr,
> #endif
> @@ -302,6 +319,7 @@ const struct inode_operations erofs_symlink_iops = {
>
> const struct inode_operations erofs_fast_symlink_iops = {
> .get_link = simple_get_link,
> + .getattr = erofs_getattr,
> #ifdef CONFIG_EROFS_FS_XATTR
> .listxattr = erofs_listxattr,
> #endif
> diff --git a/drivers/staging/erofs/internal.h
> b/drivers/staging/erofs/internal.h
> index c47778b3fabd..911333cdeef4 100644
> --- a/drivers/staging/erofs/internal.h
> +++ b/drivers/staging/erofs/internal.h
> @@ -556,6 +556,8 @@ static inline bool is_inode_fast_symlink(struct inode
> *inode)
> }
>
> struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid, bool dir);
> +int erofs_getattr(const struct path *path, struct kstat *stat,
> + u32 request_mask, unsigned int query_flags);
>
> /* namei.c */
> extern const struct inode_operations erofs_dir_iops;
> diff --git a/drivers/staging/erofs/namei.c b/drivers/staging/erofs/namei.c
> index d8d9dc9dab43..fd3ae78d0ba5 100644
> --- a/drivers/staging/erofs/namei.c
> +++ b/drivers/staging/erofs/namei.c
> @@ -247,6 +247,7 @@ static struct dentry *erofs_lookup(struct inode *dir,
>
> const struct inode_operations erofs_dir_iops = {
> .lookup = erofs_lookup,
> + .getattr = erofs_getattr,
> #ifdef CONFIG_EROFS_FS_XATTR
> .listxattr = erofs_listxattr,
> #endif
>
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