powerpc/spufs: allow spufs files to specify sizes

Currently, spufs never specifies the i_size for the files in context
directories, so stat() always reports 0-byte files.

This change adds allows the spufs_dir_(nosched_)contents arrays to
specify a file size. This allows stat() to report correct file sizes,
and makes SEEK_END work.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

3 files changed, 15 insertions, 7 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index d0a497d9140b..9533a8ad33f2 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -2607,7 +2607,7 @@ static const struct file_operations spufs_ctx_fops = {
         .release        = single_release,
 };
 
-struct tree_descr spufs_dir_contents[] = {
+struct spufs_tree_descr spufs_dir_contents[] = {
         { "capabilities", &spufs_caps_fops, 0444, },
         { "mem",  &spufs_mem_fops,  0666, },
         { "regs", &spufs_regs_fops,  0666, },
@@ -2647,7 +2647,7 @@ struct tree_descr spufs_dir_contents[] = {
         {},
 };
 
-struct tree_descr spufs_dir_nosched_contents[] = {
+struct spufs_tree_descr spufs_dir_nosched_contents[] = {
         { "capabilities", &spufs_caps_fops, 0444, },
         { "mem",  &spufs_mem_fops,  0666, },
         { "mbox", &spufs_mbox_fops, 0444, },
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index f407b2471855..c662ca783601 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -109,7 +109,7 @@ spufs_setattr(struct dentry *dentry, struct iattr *attr)
 static int
 spufs_new_file(struct super_block *sb, struct dentry *dentry,
                 const struct file_operations *fops, int mode,
-                struct spu_context *ctx)
+                size_t size, struct spu_context *ctx)
 {
         static struct inode_operations spufs_file_iops = {
                 .setattr = spufs_setattr,
@@ -125,6 +125,7 @@ spufs_new_file(struct super_block *sb, struct dentry *dentry,
         ret = 0;
         inode->i_op = &spufs_file_iops;
         inode->i_fop = fops;
+        inode->i_size = size;
         inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
         d_add(dentry, inode);
 out:
@@ -177,7 +178,7 @@ static int spufs_rmdir(struct inode *parent, struct dentry *dir)
         return simple_rmdir(parent, dir);
 }
 
-static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
+static int spufs_fill_dir(struct dentry *dir, struct spufs_tree_descr *files,
                           int mode, struct spu_context *ctx)
 {
         struct dentry *dentry, *tmp;
@@ -189,7 +190,7 @@ static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
                 if (!dentry)
                         goto out;
                 ret = spufs_new_file(dir->d_sb, dentry, files->ops,
-                                        files->mode & mode, ctx);
+                                        files->mode & mode, files->size, ctx);
                 if (ret)
                         goto out;
                 files++;
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 433dece5c823..413605406bda 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -235,8 +235,15 @@ struct spufs_inode_info {
 #define SPUFS_I(inode) \
         container_of(inode, struct spufs_inode_info, vfs_inode)
 
-extern struct tree_descr spufs_dir_contents[];
-extern struct tree_descr spufs_dir_nosched_contents[];
+struct spufs_tree_descr {
+        const char *name;
+        const struct file_operations *ops;
+        int mode;
+        size_t size;
+};
+
+extern struct spufs_tree_descr spufs_dir_contents[];
+extern struct spufs_tree_descr spufs_dir_nosched_contents[];
 
 /* system call implementation */
 extern struct spufs_calls spufs_calls;