Merge branch 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2
* 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2: configfs: Make sure configfs_init() is called before consumers. configfs: configfs_mkdir() failed to cleanup linkage. configfs: Fix a reference leak in configfs_mkdir(). ocfs2: fix gfp mask in some file system paths ocfs2: Don't populate uptodate cache in ocfs2_force_read_journal() ocfs2: take meta data lock in ocfs2_file_aio_read() ocfs2: take data locks around extend
This commit is contained in:
Linus Torvalds
Коммит
15eb7105a7
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|
@ -45,6 +45,7 @@ obj-$(CONFIG_DNOTIFY) += dnotify.o
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obj-$(CONFIG_PROC_FS) += proc/
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obj-y += partitions/
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obj-$(CONFIG_SYSFS) += sysfs/
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obj-$(CONFIG_CONFIGFS_FS) += configfs/
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obj-y += devpts/
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obj-$(CONFIG_PROFILING) += dcookies.o
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@ -100,5 +101,4 @@ obj-$(CONFIG_BEFS_FS) += befs/
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obj-$(CONFIG_HOSTFS) += hostfs/
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obj-$(CONFIG_HPPFS) += hppfs/
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obj-$(CONFIG_DEBUG_FS) += debugfs/
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obj-$(CONFIG_CONFIGFS_FS) += configfs/
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obj-$(CONFIG_OCFS2_FS) += ocfs2/
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@ -505,13 +505,15 @@ static int populate_groups(struct config_group *group)
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int i;
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if (group->default_groups) {
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/* FYI, we're faking mkdir here
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/*
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* FYI, we're faking mkdir here
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* I'm not sure we need this semaphore, as we're called
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* from our parent's mkdir. That holds our parent's
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* i_mutex, so afaik lookup cannot continue through our
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* parent to find us, let alone mess with our tree.
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* That said, taking our i_mutex is closer to mkdir
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* emulation, and shouldn't hurt. */
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* emulation, and shouldn't hurt.
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*/
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mutex_lock(&dentry->d_inode->i_mutex);
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for (i = 0; group->default_groups[i]; i++) {
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@ -546,20 +548,34 @@ static void unlink_obj(struct config_item *item)
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item->ci_group = NULL;
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item->ci_parent = NULL;
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/* Drop the reference for ci_entry */
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config_item_put(item);
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/* Drop the reference for ci_parent */
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config_group_put(group);
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}
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}
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static void link_obj(struct config_item *parent_item, struct config_item *item)
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{
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/* Parent seems redundant with group, but it makes certain
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* traversals much nicer. */
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/*
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* Parent seems redundant with group, but it makes certain
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* traversals much nicer.
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*/
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item->ci_parent = parent_item;
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/*
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* We hold a reference on the parent for the child's ci_parent
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* link.
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*/
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item->ci_group = config_group_get(to_config_group(parent_item));
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list_add_tail(&item->ci_entry, &item->ci_group->cg_children);
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/*
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* We hold a reference on the child for ci_entry on the parent's
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* cg_children
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*/
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config_item_get(item);
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}
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@ -684,6 +700,10 @@ static void client_drop_item(struct config_item *parent_item,
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type = parent_item->ci_type;
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BUG_ON(!type);
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/*
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* If ->drop_item() exists, it is responsible for the
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* config_item_put().
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*/
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if (type->ct_group_ops && type->ct_group_ops->drop_item)
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type->ct_group_ops->drop_item(to_config_group(parent_item),
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item);
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@ -694,23 +714,28 @@ static void client_drop_item(struct config_item *parent_item,
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static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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{
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int ret;
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int ret, module_got = 0;
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struct config_group *group;
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struct config_item *item;
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struct config_item *parent_item;
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struct configfs_subsystem *subsys;
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struct configfs_dirent *sd;
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struct config_item_type *type;
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struct module *owner;
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struct module *owner = NULL;
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char *name;
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if (dentry->d_parent == configfs_sb->s_root)
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return -EPERM;
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if (dentry->d_parent == configfs_sb->s_root) {
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ret = -EPERM;
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goto out;
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}
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sd = dentry->d_parent->d_fsdata;
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if (!(sd->s_type & CONFIGFS_USET_DIR))
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return -EPERM;
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if (!(sd->s_type & CONFIGFS_USET_DIR)) {
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ret = -EPERM;
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goto out;
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}
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/* Get a working ref for the duration of this function */
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parent_item = configfs_get_config_item(dentry->d_parent);
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type = parent_item->ci_type;
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subsys = to_config_group(parent_item)->cg_subsys;
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@ -719,15 +744,16 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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if (!type || !type->ct_group_ops ||
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(!type->ct_group_ops->make_group &&
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!type->ct_group_ops->make_item)) {
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config_item_put(parent_item);
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return -EPERM; /* What lack-of-mkdir returns */
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ret = -EPERM; /* Lack-of-mkdir returns -EPERM */
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goto out_put;
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}
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name = kmalloc(dentry->d_name.len + 1, GFP_KERNEL);
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if (!name) {
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config_item_put(parent_item);
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return -ENOMEM;
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ret = -ENOMEM;
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goto out_put;
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||||
}
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snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);
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down(&subsys->su_sem);
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@ -748,40 +774,67 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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kfree(name);
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if (!item) {
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config_item_put(parent_item);
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return -ENOMEM;
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/*
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* If item == NULL, then link_obj() was never called.
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* There are no extra references to clean up.
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*/
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ret = -ENOMEM;
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goto out_put;
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}
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ret = -EINVAL;
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/*
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* link_obj() has been called (via link_group() for groups).
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* From here on out, errors must clean that up.
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*/
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type = item->ci_type;
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if (type) {
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owner = type->ct_owner;
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if (try_module_get(owner)) {
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if (group) {
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ret = configfs_attach_group(parent_item,
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item,
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dentry);
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} else {
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ret = configfs_attach_item(parent_item,
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item,
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dentry);
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}
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if (ret) {
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down(&subsys->su_sem);
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if (group)
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unlink_group(group);
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else
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unlink_obj(item);
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client_drop_item(parent_item, item);
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up(&subsys->su_sem);
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config_item_put(parent_item);
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module_put(owner);
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}
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}
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if (!type) {
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ret = -EINVAL;
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goto out_unlink;
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}
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owner = type->ct_owner;
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if (!try_module_get(owner)) {
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ret = -EINVAL;
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goto out_unlink;
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}
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/*
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* I hate doing it this way, but if there is
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* an error, module_put() probably should
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* happen after any cleanup.
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*/
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module_got = 1;
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if (group)
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ret = configfs_attach_group(parent_item, item, dentry);
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else
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ret = configfs_attach_item(parent_item, item, dentry);
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out_unlink:
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if (ret) {
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/* Tear down everything we built up */
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down(&subsys->su_sem);
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if (group)
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unlink_group(group);
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else
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unlink_obj(item);
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client_drop_item(parent_item, item);
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up(&subsys->su_sem);
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if (module_got)
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module_put(owner);
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}
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out_put:
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/*
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* link_obj()/link_group() took a reference from child->parent,
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* so the parent is safely pinned. We can drop our working
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* reference.
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*/
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config_item_put(parent_item);
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out:
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return ret;
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}
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@ -801,6 +854,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
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if (sd->s_type & CONFIGFS_USET_DEFAULT)
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return -EPERM;
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/* Get a working ref until we have the child */
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parent_item = configfs_get_config_item(dentry->d_parent);
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subsys = to_config_group(parent_item)->cg_subsys;
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BUG_ON(!subsys);
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@ -817,6 +871,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
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return ret;
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}
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/* Get a working ref for the duration of this function */
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item = configfs_get_config_item(dentry);
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/* Drop reference from above, item already holds one. */
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|
|
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|||
|
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@ -276,13 +276,29 @@ static int ocfs2_writepage(struct page *page, struct writeback_control *wbc)
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return ret;
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}
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/* This can also be called from ocfs2_write_zero_page() which has done
|
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* it's own cluster locking. */
|
||||
int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
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unsigned from, unsigned to)
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{
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int ret;
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||||
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||||
down_read(&OCFS2_I(inode)->ip_alloc_sem);
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||||
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ret = block_prepare_write(page, from, to, ocfs2_get_block);
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up_read(&OCFS2_I(inode)->ip_alloc_sem);
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return ret;
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}
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|
||||
/*
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||||
* ocfs2_prepare_write() can be an outer-most ocfs2 call when it is called
|
||||
* from loopback. It must be able to perform its own locking around
|
||||
* ocfs2_get_block().
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*/
|
||||
int ocfs2_prepare_write(struct file *file, struct page *page,
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unsigned from, unsigned to)
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||||
static int ocfs2_prepare_write(struct file *file, struct page *page,
|
||||
unsigned from, unsigned to)
|
||||
{
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||||
struct inode *inode = page->mapping->host;
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||||
int ret;
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||||
|
|
@ -295,11 +311,7 @@ int ocfs2_prepare_write(struct file *file, struct page *page,
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|||
goto out;
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||||
}
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||||
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down_read(&OCFS2_I(inode)->ip_alloc_sem);
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ret = block_prepare_write(page, from, to, ocfs2_get_block);
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up_read(&OCFS2_I(inode)->ip_alloc_sem);
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ret = ocfs2_prepare_write_nolock(inode, page, from, to);
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||||
|
||||
ocfs2_meta_unlock(inode, 0);
|
||||
out:
|
||||
|
|
@ -625,11 +637,31 @@ static ssize_t ocfs2_direct_IO(int rw,
|
|||
int ret;
|
||||
|
||||
mlog_entry_void();
|
||||
|
||||
/*
|
||||
* We get PR data locks even for O_DIRECT. This allows
|
||||
* concurrent O_DIRECT I/O but doesn't let O_DIRECT with
|
||||
* extending and buffered zeroing writes race. If they did
|
||||
* race then the buffered zeroing could be written back after
|
||||
* the O_DIRECT I/O. It's one thing to tell people not to mix
|
||||
* buffered and O_DIRECT writes, but expecting them to
|
||||
* understand that file extension is also an implicit buffered
|
||||
* write is too much. By getting the PR we force writeback of
|
||||
* the buffered zeroing before proceeding.
|
||||
*/
|
||||
ret = ocfs2_data_lock(inode, 0);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
ocfs2_data_unlock(inode, 0);
|
||||
|
||||
ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
|
||||
inode->i_sb->s_bdev, iov, offset,
|
||||
nr_segs,
|
||||
ocfs2_direct_IO_get_blocks,
|
||||
ocfs2_dio_end_io);
|
||||
out:
|
||||
mlog_exit(ret);
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -22,8 +22,8 @@
|
|||
#ifndef OCFS2_AOPS_H
|
||||
#define OCFS2_AOPS_H
|
||||
|
||||
int ocfs2_prepare_write(struct file *file, struct page *page,
|
||||
unsigned from, unsigned to);
|
||||
int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
|
||||
unsigned from, unsigned to);
|
||||
|
||||
struct ocfs2_journal_handle *ocfs2_start_walk_page_trans(struct inode *inode,
|
||||
struct page *page,
|
||||
|
|
|
|||
|
|
@ -569,7 +569,7 @@ static int ocfs2_extent_map_insert(struct inode *inode,
|
|||
|
||||
ret = -ENOMEM;
|
||||
ctxt.new_ent = kmem_cache_alloc(ocfs2_em_ent_cachep,
|
||||
GFP_KERNEL);
|
||||
GFP_NOFS);
|
||||
if (!ctxt.new_ent) {
|
||||
mlog_errno(ret);
|
||||
return ret;
|
||||
|
|
@ -583,14 +583,14 @@ static int ocfs2_extent_map_insert(struct inode *inode,
|
|||
if (ctxt.need_left && !ctxt.left_ent) {
|
||||
ctxt.left_ent =
|
||||
kmem_cache_alloc(ocfs2_em_ent_cachep,
|
||||
GFP_KERNEL);
|
||||
GFP_NOFS);
|
||||
if (!ctxt.left_ent)
|
||||
break;
|
||||
}
|
||||
if (ctxt.need_right && !ctxt.right_ent) {
|
||||
ctxt.right_ent =
|
||||
kmem_cache_alloc(ocfs2_em_ent_cachep,
|
||||
GFP_KERNEL);
|
||||
GFP_NOFS);
|
||||
if (!ctxt.right_ent)
|
||||
break;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -613,7 +613,8 @@ leave:
|
|||
|
||||
/* Some parts of this taken from generic_cont_expand, which turned out
|
||||
* to be too fragile to do exactly what we need without us having to
|
||||
* worry about recursive locking in ->commit_write(). */
|
||||
* worry about recursive locking in ->prepare_write() and
|
||||
* ->commit_write(). */
|
||||
static int ocfs2_write_zero_page(struct inode *inode,
|
||||
u64 size)
|
||||
{
|
||||
|
|
@ -641,7 +642,7 @@ static int ocfs2_write_zero_page(struct inode *inode,
|
|||
goto out;
|
||||
}
|
||||
|
||||
ret = ocfs2_prepare_write(NULL, page, offset, offset);
|
||||
ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out_unlock;
|
||||
|
|
@ -695,13 +696,26 @@ out:
|
|||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* A tail_to_skip value > 0 indicates that we're being called from
|
||||
* ocfs2_file_aio_write(). This has the following implications:
|
||||
*
|
||||
* - we don't want to update i_size
|
||||
* - di_bh will be NULL, which is fine because it's only used in the
|
||||
* case where we want to update i_size.
|
||||
* - ocfs2_zero_extend() will then only be filling the hole created
|
||||
* between i_size and the start of the write.
|
||||
*/
|
||||
static int ocfs2_extend_file(struct inode *inode,
|
||||
struct buffer_head *di_bh,
|
||||
u64 new_i_size)
|
||||
u64 new_i_size,
|
||||
size_t tail_to_skip)
|
||||
{
|
||||
int ret = 0;
|
||||
u32 clusters_to_add;
|
||||
|
||||
BUG_ON(!tail_to_skip && !di_bh);
|
||||
|
||||
/* setattr sometimes calls us like this. */
|
||||
if (new_i_size == 0)
|
||||
goto out;
|
||||
|
|
@ -714,27 +728,44 @@ static int ocfs2_extend_file(struct inode *inode,
|
|||
OCFS2_I(inode)->ip_clusters;
|
||||
|
||||
if (clusters_to_add) {
|
||||
/*
|
||||
* protect the pages that ocfs2_zero_extend is going to
|
||||
* be pulling into the page cache.. we do this before the
|
||||
* metadata extend so that we don't get into the situation
|
||||
* where we've extended the metadata but can't get the data
|
||||
* lock to zero.
|
||||
*/
|
||||
ret = ocfs2_data_lock(inode, 1);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = ocfs2_extend_allocation(inode, clusters_to_add);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
ret = ocfs2_zero_extend(inode, new_i_size);
|
||||
ret = ocfs2_zero_extend(inode, (u64)new_i_size - tail_to_skip);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
goto out_unlock;
|
||||
}
|
||||
}
|
||||
|
||||
/* No allocation required, we just use this helper to
|
||||
* do a trivial update of i_size. */
|
||||
ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!tail_to_skip) {
|
||||
/* We're being called from ocfs2_setattr() which wants
|
||||
* us to update i_size */
|
||||
ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
|
||||
if (ret < 0)
|
||||
mlog_errno(ret);
|
||||
}
|
||||
|
||||
out_unlock:
|
||||
if (clusters_to_add) /* this is the only case in which we lock */
|
||||
ocfs2_data_unlock(inode, 1);
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -793,7 +824,7 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
|
|||
if (i_size_read(inode) > attr->ia_size)
|
||||
status = ocfs2_truncate_file(inode, bh, attr->ia_size);
|
||||
else
|
||||
status = ocfs2_extend_file(inode, bh, attr->ia_size);
|
||||
status = ocfs2_extend_file(inode, bh, attr->ia_size, 0);
|
||||
if (status < 0) {
|
||||
if (status != -ENOSPC)
|
||||
mlog_errno(status);
|
||||
|
|
@ -1049,21 +1080,12 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
|
|||
if (!clusters)
|
||||
break;
|
||||
|
||||
ret = ocfs2_extend_allocation(inode, clusters);
|
||||
ret = ocfs2_extend_file(inode, NULL, newsize, count);
|
||||
if (ret < 0) {
|
||||
if (ret != -ENOSPC)
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Fill any holes which would've been created by this
|
||||
* write. If we're O_APPEND, this will wind up
|
||||
* (correctly) being a noop. */
|
||||
ret = ocfs2_zero_extend(inode, (u64) newsize - count);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -1146,6 +1168,22 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
|
|||
ocfs2_iocb_set_rw_locked(iocb);
|
||||
}
|
||||
|
||||
/*
|
||||
* We're fine letting folks race truncates and extending
|
||||
* writes with read across the cluster, just like they can
|
||||
* locally. Hence no rw_lock during read.
|
||||
*
|
||||
* Take and drop the meta data lock to update inode fields
|
||||
* like i_size. This allows the checks down below
|
||||
* generic_file_aio_read() a chance of actually working.
|
||||
*/
|
||||
ret = ocfs2_meta_lock(inode, NULL, NULL, 0);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto bail;
|
||||
}
|
||||
ocfs2_meta_unlock(inode, 0);
|
||||
|
||||
ret = generic_file_aio_read(iocb, buf, count, iocb->ki_pos);
|
||||
if (ret == -EINVAL)
|
||||
mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n");
|
||||
|
|
|
|||
|
|
@ -117,7 +117,7 @@ struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb)
|
|||
{
|
||||
struct ocfs2_journal_handle *retval = NULL;
|
||||
|
||||
retval = kcalloc(1, sizeof(*retval), GFP_KERNEL);
|
||||
retval = kcalloc(1, sizeof(*retval), GFP_NOFS);
|
||||
if (!retval) {
|
||||
mlog(ML_ERROR, "Failed to allocate memory for journal "
|
||||
"handle!\n");
|
||||
|
|
@ -870,9 +870,11 @@ static int ocfs2_force_read_journal(struct inode *inode)
|
|||
if (p_blocks > CONCURRENT_JOURNAL_FILL)
|
||||
p_blocks = CONCURRENT_JOURNAL_FILL;
|
||||
|
||||
/* We are reading journal data which should not
|
||||
* be put in the uptodate cache */
|
||||
status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb),
|
||||
p_blkno, p_blocks, bhs, 0,
|
||||
inode);
|
||||
NULL);
|
||||
if (status < 0) {
|
||||
mlog_errno(status);
|
||||
goto bail;
|
||||
|
|
@ -982,7 +984,7 @@ static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal,
|
|||
{
|
||||
struct ocfs2_la_recovery_item *item;
|
||||
|
||||
item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_KERNEL);
|
||||
item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS);
|
||||
if (!item) {
|
||||
/* Though we wish to avoid it, we are in fact safe in
|
||||
* skipping local alloc cleanup as fsck.ocfs2 is more
|
||||
|
|
|
|||
|
|
@ -337,7 +337,7 @@ static void __ocfs2_set_buffer_uptodate(struct ocfs2_inode_info *oi,
|
|||
(unsigned long long)oi->ip_blkno,
|
||||
(unsigned long long)block, expand_tree);
|
||||
|
||||
new = kmem_cache_alloc(ocfs2_uptodate_cachep, GFP_KERNEL);
|
||||
new = kmem_cache_alloc(ocfs2_uptodate_cachep, GFP_NOFS);
|
||||
if (!new) {
|
||||
mlog_errno(-ENOMEM);
|
||||
return;
|
||||
|
|
@ -349,7 +349,7 @@ static void __ocfs2_set_buffer_uptodate(struct ocfs2_inode_info *oi,
|
|||
* has no way of tracking that. */
|
||||
for(i = 0; i < OCFS2_INODE_MAX_CACHE_ARRAY; i++) {
|
||||
tree[i] = kmem_cache_alloc(ocfs2_uptodate_cachep,
|
||||
GFP_KERNEL);
|
||||
GFP_NOFS);
|
||||
if (!tree[i]) {
|
||||
mlog_errno(-ENOMEM);
|
||||
goto out_free;
|
||||
|
|
|
|||
|
|
@ -586,7 +586,7 @@ static struct ocfs2_net_wait_ctxt *ocfs2_new_net_wait_ctxt(unsigned int response
|
|||
{
|
||||
struct ocfs2_net_wait_ctxt *w;
|
||||
|
||||
w = kcalloc(1, sizeof(*w), GFP_KERNEL);
|
||||
w = kcalloc(1, sizeof(*w), GFP_NOFS);
|
||||
if (!w) {
|
||||
mlog_errno(-ENOMEM);
|
||||
goto bail;
|
||||
|
|
@ -749,7 +749,7 @@ static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb,
|
|||
|
||||
BUG_ON(!ocfs2_is_valid_vote_request(type));
|
||||
|
||||
request = kcalloc(1, sizeof(*request), GFP_KERNEL);
|
||||
request = kcalloc(1, sizeof(*request), GFP_NOFS);
|
||||
if (!request) {
|
||||
mlog_errno(-ENOMEM);
|
||||
} else {
|
||||
|
|
@ -1129,7 +1129,7 @@ static int ocfs2_handle_vote_message(struct o2net_msg *msg,
|
|||
struct ocfs2_super *osb = data;
|
||||
struct ocfs2_vote_work *work;
|
||||
|
||||
work = kmalloc(sizeof(struct ocfs2_vote_work), GFP_KERNEL);
|
||||
work = kmalloc(sizeof(struct ocfs2_vote_work), GFP_NOFS);
|
||||
if (!work) {
|
||||
status = -ENOMEM;
|
||||
mlog_errno(status);
|
||||
|
|
|
|||
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Ссылка в новой задаче