staging: erofs: support statx

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 <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
index c7d3b815a798320292f23d718520beedb68c8e3b..1c220900e1a0e0e57aa6808d7356d24dcf5b3ffc 100644 (file)
--- a/drivers/staging/erofs/inode.c
+++ b/drivers/staging/erofs/inode.c
@@ -285,7 +285,25 @@ 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;
+       stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
+                                 STATX_ATTR_IMMUTABLE);
+
+       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 +312,7 @@ 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 +321,7 @@ 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 c47778b3fabd31a3648b285907b7ff1377b9dae2..911333cdeef4e946b36a94ef7064345bb8c16a68 100644 (file)
--- 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 d8d9dc9dab437866d9284ff7b405565bf1c6f9cd..fd3ae78d0ba59cec223fc46edeabfcc6a20f1f58 100644 (file)
--- 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