/* * linux/fs/nfs/symlink.c * * Copyright (C) 1992 Rick Sladkey * * Optimization changes Copyright (C) 1994 Florian La Roche * * Jun 7 1999, cache symlink lookups in the page cache. -DaveM * * nfs symlink handling code */ #include #include #include #include #include #include #include #include #include #include /* Symlink caching in the page cache is even more simplistic * and straight-forward than readdir caching. */ static int nfs_symlink_filler(struct inode *inode, struct page *page) { int error; error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE); if (error < 0) goto error; SetPageUptodate(page); unlock_page(page); return 0; error: SetPageError(page); unlock_page(page); return -EIO; } static const char *nfs_get_link(struct dentry *dentry, struct inode *inode, struct delayed_call *done) { struct page *page; void *err; if (!dentry) { err = ERR_PTR(nfs_revalidate_mapping_rcu(inode)); if (err) return err; page = find_get_page(inode->i_mapping, 0); if (!page) return ERR_PTR(-ECHILD); if (!PageUptodate(page)) { put_page(page); return ERR_PTR(-ECHILD); } } else { err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping)); if (err) return err; page = read_cache_page(&inode->i_data, 0, (filler_t *)nfs_symlink_filler, inode); if (IS_ERR(page)) return ERR_CAST(page); } set_delayed_call(done, page_put_link, page); return page_address(page); } /* * symlinks can't do much... */ const struct inode_operations nfs_symlink_inode_operations = { .get_link = nfs_get_link, .getattr = nfs_getattr, .setattr = nfs_setattr, }; if.c?h=nds-private-remove'>logtree commit diff

path: root/drivers/usb/isp1760/isp1760-if.c

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