[readdir] convert afs

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 7a465ed..34494fb 100644 (file)
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -22,7 +22,7 @@
 static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
                                 unsigned int flags);
 static int afs_dir_open(struct inode *inode, struct file *file);
-static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
+static int afs_readdir(struct file *file, struct dir_context *ctx);
 static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
 static int afs_d_delete(const struct dentry *dentry);
 static void afs_d_release(struct dentry *dentry);
@@ -43,7 +43,7 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
 const struct file_operations afs_dir_file_operations = {
        .open           = afs_dir_open,
        .release        = afs_release,
-       .readdir        = afs_readdir,
+       .iterate        = afs_readdir,
        .lock           = afs_lock,
        .llseek         = generic_file_llseek,
 };
@@ -119,9 +119,9 @@ struct afs_dir_page {
 };
 
 struct afs_lookup_cookie {
+       struct dir_context ctx;
        struct afs_fid  fid;
-       const char      *name;
-       size_t          nlen;
+       struct qstr name;
        int             found;
 };
 
@@ -228,20 +228,18 @@ static int afs_dir_open(struct inode *inode, struct file *file)
 /*
  * deal with one block in an AFS directory
  */
-static int afs_dir_iterate_block(unsigned *fpos,
+static int afs_dir_iterate_block(struct dir_context *ctx,
                                 union afs_dir_block *block,
-                                unsigned blkoff,
-                                void *cookie,
-                                filldir_t filldir)
+                                unsigned blkoff)
 {
        union afs_dirent *dire;
        unsigned offset, next, curr;
        size_t nlen;
-       int tmp, ret;
+       int tmp;
 
-       _enter("%u,%x,%p,,",*fpos,blkoff,block);
+       _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block);
 
-       curr = (*fpos - blkoff) / sizeof(union afs_dirent);
+       curr = (ctx->pos - blkoff) / sizeof(union afs_dirent);
 
        /* walk through the block, an entry at a time */
        for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries;
@@ -256,7 +254,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
                        _debug("ENT[%Zu.%u]: unused",
                               blkoff / sizeof(union afs_dir_block), offset);
                        if (offset >= curr)
-                               *fpos = blkoff +
+                               ctx->pos = blkoff +
                                        next * sizeof(union afs_dirent);
                        continue;
                }
@@ -302,19 +300,15 @@ static int afs_dir_iterate_block(unsigned *fpos,
                        continue;
 
                /* found the next entry */
-               ret = filldir(cookie,
-                             dire->u.name,
-                             nlen,
-                             blkoff + offset * sizeof(union afs_dirent),
+               if (!dir_emit(ctx, dire->u.name, nlen,
                              ntohl(dire->u.vnode),
-                             filldir == afs_lookup_filldir ?
-                             ntohl(dire->u.unique) : DT_UNKNOWN);
-               if (ret < 0) {
+                             ctx->actor == afs_lookup_filldir ?
+                             ntohl(dire->u.unique) : DT_UNKNOWN)) {
                        _leave(" = 0 [full]");
                        return 0;
                }
 
-               *fpos = blkoff + next * sizeof(union afs_dirent);
+               ctx->pos = blkoff + next * sizeof(union afs_dirent);
        }
 
        _leave(" = 1 [more]");
@@ -324,8 +318,8 @@ static int afs_dir_iterate_block(unsigned *fpos,
 /*
  * iterate through the data blob that lists the contents of an AFS directory
  */
-static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
-                          filldir_t filldir, struct key *key)
+static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx,
+                          struct key *key)
 {
        union afs_dir_block *dblock;
        struct afs_dir_page *dbuf;
@@ -333,7 +327,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
        unsigned blkoff, limit;
        int ret;
 
-       _enter("{%lu},%u,,", dir->i_ino, *fpos);
+       _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos);
 
        if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) {
                _leave(" = -ESTALE");
@@ -341,13 +335,13 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
        }
 
        /* round the file position up to the next entry boundary */
-       *fpos += sizeof(union afs_dirent) - 1;
-       *fpos &= ~(sizeof(union afs_dirent) - 1);
+       ctx->pos += sizeof(union afs_dirent) - 1;
+       ctx->pos &= ~(sizeof(union afs_dirent) - 1);
 
        /* walk through the blocks in sequence */
        ret = 0;
-       while (*fpos < dir->i_size) {
-               blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1);
+       while (ctx->pos < dir->i_size) {
+               blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1);
 
                /* fetch the appropriate page from the directory */
                page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key);
@@ -364,8 +358,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
                do {
                        dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) /
                                               sizeof(union afs_dir_block)];
-                       ret = afs_dir_iterate_block(fpos, dblock, blkoff,
-                                                   cookie, filldir);
+                       ret = afs_dir_iterate_block(ctx, dblock, blkoff);
                        if (ret != 1) {
                                afs_dir_put_page(page);
                                goto out;
@@ -373,7 +366,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
 
                        blkoff += sizeof(union afs_dir_block);
 
-               } while (*fpos < dir->i_size && blkoff < limit);
+               } while (ctx->pos < dir->i_size && blkoff < limit);
 
                afs_dir_put_page(page);
                ret = 0;
@@ -387,23 +380,10 @@ out:
 /*
  * read an AFS directory
  */
-static int afs_readdir(struct file *file, void *cookie, filldir_t filldir)
+static int afs_readdir(struct file *file, struct dir_context *ctx)
 {
-       unsigned fpos;
-       int ret;
-
-       _enter("{%Ld,{%lu}}",
-              file->f_pos, file_inode(file)->i_ino);
-
-       ASSERT(file->private_data != NULL);
-
-       fpos = file->f_pos;
-       ret = afs_dir_iterate(file_inode(file), &fpos,
-                             cookie, filldir, file->private_data);
-       file->f_pos = fpos;
-
-       _leave(" = %d", ret);
-       return ret;
+       return afs_dir_iterate(file_inode(file), 
+                             ctx, file->private_data);
 }
 
 /*
@@ -416,15 +396,16 @@ static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
 {
        struct afs_lookup_cookie *cookie = _cookie;
 
-       _enter("{%s,%Zu},%s,%u,,%llu,%u",
-              cookie->name, cookie->nlen, name, nlen,
+       _enter("{%s,%u},%s,%u,,%llu,%u",
+              cookie->name.name, cookie->name.len, name, nlen,
               (unsigned long long) ino, dtype);
 
        /* insanity checks first */
        BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048);
        BUILD_BUG_ON(sizeof(union afs_dirent) != 32);
 
-       if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) {
+       if (cookie->name.len != nlen ||
+           memcmp(cookie->name.name, name, nlen) != 0) {
                _leave(" = 0 [no]");
                return 0;
        }
@@ -444,24 +425,18 @@ static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
 static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
                         struct afs_fid *fid, struct key *key)
 {
-       struct afs_lookup_cookie cookie;
-       struct afs_super_info *as;
-       unsigned fpos;
+       struct afs_super_info *as = dir->i_sb->s_fs_info;
+       struct afs_lookup_cookie cookie = {
+               .ctx.actor = afs_lookup_filldir,
+               .name = dentry->d_name,
+               .fid.vid = as->volume->vid
+       };
        int ret;
 
        _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name);
 
-       as = dir->i_sb->s_fs_info;
-
        /* search the directory */
-       cookie.name     = dentry->d_name.name;
-       cookie.nlen     = dentry->d_name.len;
-       cookie.fid.vid  = as->volume->vid;
-       cookie.found    = 0;
-
-       fpos = 0;
-       ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir,
-                             key);
+       ret = afs_dir_iterate(dir, &cookie.ctx, key);
        if (ret < 0) {
                _leave(" = %d [iter]", ret);
                return ret;