1 // SPDX-License-Identifier: GPL-2.0-or-later
18 #define CACHEFILES_COOKIE_TYPE_DATA 1
43 	struct file *file = object->file;  in cachefiles_set_object_xattr()
44 	unsigned int len = object->cookie->aux_len;  in cachefiles_set_object_xattr()
48 		return -ESTALE;  in cachefiles_set_object_xattr()
49 	dentry = file->f_path.dentry;  in cachefiles_set_object_xattr()
51 	_enter("%x,#%d", object->debug_id, len);  in cachefiles_set_object_xattr()
55 		return -ENOMEM;  in cachefiles_set_object_xattr()
57 	buf->object_size	= cpu_to_be64(object->cookie->object_size);  in cachefiles_set_object_xattr()
58 	buf->zero_point		= 0;  in cachefiles_set_object_xattr()
59 	buf->type		= CACHEFILES_COOKIE_TYPE_DATA;  in cachefiles_set_object_xattr()
60 	buf->content		= object->content_info;  in cachefiles_set_object_xattr()
61 	if (test_bit(FSCACHE_COOKIE_LOCAL_WRITE, &object->cookie->flags))  in cachefiles_set_object_xattr()
62 		buf->content	= CACHEFILES_CONTENT_DIRTY;  in cachefiles_set_object_xattr()
64 		memcpy(buf->data, fscache_get_aux(object->cookie), len);  in cachefiles_set_object_xattr()
79 		trace_cachefiles_coherency(object, file_inode(file)->i_ino,  in cachefiles_set_object_xattr()
80 					   be64_to_cpup((__be64 *)buf->data),  in cachefiles_set_object_xattr()
81 					   buf->content,  in cachefiles_set_object_xattr()
83 		if (ret != -ENOMEM)  in cachefiles_set_object_xattr()
88 		trace_cachefiles_coherency(object, file_inode(file)->i_ino,  in cachefiles_set_object_xattr()
89 					   be64_to_cpup((__be64 *)buf->data),  in cachefiles_set_object_xattr()
90 					   buf->content,  in cachefiles_set_object_xattr()
100  * check the consistency between the backing cache and the FS-Cache cookie
105 	struct dentry *dentry = file->f_path.dentry;  in cachefiles_check_auxdata()
106 	unsigned int len = object->cookie->aux_len, tlen;  in cachefiles_check_auxdata()
107 	const void *p = fscache_get_aux(object->cookie);  in cachefiles_check_auxdata()
109 	ssize_t xlen;  in cachefiles_check_auxdata()  local
110 	int ret = -ESTALE;  in cachefiles_check_auxdata()
115 		return -ENOMEM;  in cachefiles_check_auxdata()
117 	xlen = cachefiles_inject_read_error();  in cachefiles_check_auxdata()
118 	if (xlen == 0)  in cachefiles_check_auxdata()
119 		xlen = vfs_getxattr(&nop_mnt_idmap, dentry, cachefiles_xattr_cache, buf, tlen);  in cachefiles_check_auxdata()
120 	if (xlen != tlen) {  in cachefiles_check_auxdata()
121 		if (xlen < 0) {  in cachefiles_check_auxdata()
122 			ret = xlen;  in cachefiles_check_auxdata()
123 			trace_cachefiles_vfs_error(object, file_inode(file), xlen,  in cachefiles_check_auxdata()
126 		if (xlen == -EIO)  in cachefiles_check_auxdata()
129 				"Failed to read aux with error %zd", xlen);  in cachefiles_check_auxdata()
134 	if (buf->type != CACHEFILES_COOKIE_TYPE_DATA) {  in cachefiles_check_auxdata()
136 	} else if (memcmp(buf->data, p, len) != 0) {  in cachefiles_check_auxdata()
138 	} else if (be64_to_cpu(buf->object_size) != object->cookie->object_size) {  in cachefiles_check_auxdata()
140 	} else if (buf->content == CACHEFILES_CONTENT_DIRTY) {  in cachefiles_check_auxdata()
150 	trace_cachefiles_coherency(object, file_inode(file)->i_ino,  in cachefiles_check_auxdata()
151 				   be64_to_cpup((__be64 *)buf->data),  in cachefiles_check_auxdata()
152 				   buf->content, why);  in cachefiles_check_auxdata()
168 		ret = mnt_want_write(cache->mnt);  in cachefiles_remove_object_xattr()
172 			mnt_drop_write(cache->mnt);  in cachefiles_remove_object_xattr()
178 		if (ret == -ENOENT || ret == -ENODATA)  in cachefiles_remove_object_xattr()
180 		else if (ret != -ENOMEM)  in cachefiles_remove_object_xattr()
184 					    d_backing_inode(dentry)->i_ino, -ret);  in cachefiles_remove_object_xattr()
197 	struct cachefiles_object *object = cookie->cache_priv;  in cachefiles_prepare_to_write()
198 	struct cachefiles_cache *cache = object->volume->cache;  in cachefiles_prepare_to_write()
200 	_enter("c=%08x", object->cookie->debug_id);  in cachefiles_prepare_to_write()
202 	if (!test_bit(CACHEFILES_OBJECT_USING_TMPFILE, &object->flags)) {  in cachefiles_prepare_to_write()
215 	unsigned int len = volume->vcookie->coherency_len;  in cachefiles_set_volume_xattr()
216 	const void *p = volume->vcookie->coherency;  in cachefiles_set_volume_xattr()
217 	struct dentry *dentry = volume->dentry;  in cachefiles_set_volume_xattr()
220 	_enter("%x,#%d", volume->vcookie->debug_id, len);  in cachefiles_set_volume_xattr()
226 	buf->reserved = cpu_to_be32(0);  in cachefiles_set_volume_xattr()
227 	memcpy(buf->data, p, volume->vcookie->coherency_len);  in cachefiles_set_volume_xattr()
231 		ret = mnt_want_write(volume->cache->mnt);  in cachefiles_set_volume_xattr()
236 			mnt_drop_write(volume->cache->mnt);  in cachefiles_set_volume_xattr()
242 		trace_cachefiles_vol_coherency(volume, d_inode(dentry)->i_ino,  in cachefiles_set_volume_xattr()
244 		if (ret != -ENOMEM)  in cachefiles_set_volume_xattr()
246 				volume->cache, "Failed to set xattr with error %d", ret);  in cachefiles_set_volume_xattr()
248 		trace_cachefiles_vol_coherency(volume, d_inode(dentry)->i_ino,  in cachefiles_set_volume_xattr()
263 	struct dentry *dentry = volume->dentry;  in cachefiles_check_volume_xattr()
264 	unsigned int len = volume->vcookie->coherency_len;  in cachefiles_check_volume_xattr()
265 	const void *p = volume->vcookie->coherency;  in cachefiles_check_volume_xattr()
267 	ssize_t xlen;  in cachefiles_check_volume_xattr()  local
268 	int ret = -ESTALE;  in cachefiles_check_volume_xattr()
275 		return -ENOMEM;  in cachefiles_check_volume_xattr()
277 	xlen = cachefiles_inject_read_error();  in cachefiles_check_volume_xattr()
278 	if (xlen == 0)  in cachefiles_check_volume_xattr()
279 		xlen = vfs_getxattr(&nop_mnt_idmap, dentry, cachefiles_xattr_cache, buf, len);  in cachefiles_check_volume_xattr()
280 	if (xlen != len) {  in cachefiles_check_volume_xattr()
281 		if (xlen < 0) {  in cachefiles_check_volume_xattr()
282 			ret = xlen;  in cachefiles_check_volume_xattr()
283 			trace_cachefiles_vfs_error(NULL, d_inode(dentry), xlen,  in cachefiles_check_volume_xattr()
285 			if (xlen == -EIO)  in cachefiles_check_volume_xattr()
287 					volume->cache,  in cachefiles_check_volume_xattr()
288 					"Failed to read xattr with error %zd", xlen);  in cachefiles_check_volume_xattr()
291 	} else if (buf->reserved != cpu_to_be32(0)) {  in cachefiles_check_volume_xattr()
293 	} else if (memcmp(buf->data, p, len - sizeof(*buf)) != 0) {  in cachefiles_check_volume_xattr()
300 	trace_cachefiles_vol_coherency(volume, d_inode(dentry)->i_ino, why);  in cachefiles_check_volume_xattr()