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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2

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* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2:
  [PATCH] ocfs2: fix oops in mmap_truncate testing
  configfs: call drop_link() to cleanup after create_link() failure
  configfs: Allow ->make_item() and ->make_group() to return detailed errors.
  configfs: Fix failing mkdir() making racing rmdir() fail
  configfs: Fix deadlock with racing rmdir() and rename()
  configfs: Make configfs_new_dirent() return error code instead of NULL
  configfs: Protect configfs_dirent s_links list mutations
  configfs: Introduce configfs_dirent_lock
  ocfs2: Don't snprintf() without a format.
  ocfs2: Fix CONFIG_OCFS2_DEBUG_FS #ifdefs
  ocfs2/net: Silence build warnings on sparc64
  ocfs2: Handle error during journal load
  ocfs2: Silence an error message in ocfs2_file_aio_read()
  ocfs2: use simple_read_from_buffer()
  ocfs2: fix printk format warnings with OCFS2_FS_STATS=n
  [PATCH 2/2] ocfs2: Instrument fs cluster locks
  [PATCH 1/2] ocfs2: Add CONFIG_OCFS2_FS_STATS config option
This commit is contained in:
Linus Torvalds 2008-07-17 10:55:51 -07:00
commit 5b664cb235
22 changed files with 383 additions and 127 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/filesystems/configfs/configfs.txt
View File

@ -233,10 +233,12 @@ accomplished via the group operations specified on the group's
config_item_type.
struct configfs_group_operations {
struct config_item *(*make_item)(struct config_group *group,
const char *name);
struct config_group *(*make_group)(struct config_group *group,
const char *name);
int (*make_item)(struct config_group *group,
const char *name,
struct config_item **new_item);
int (*make_group)(struct config_group *group,
const char *name,
struct config_group **new_group);
int (*commit_item)(struct config_item *item);
void (*disconnect_notify)(struct config_group *group,
struct config_item *item);

14
Documentation/filesystems/configfs/configfs_example.c
View File

@ -273,13 +273,13 @@ static inline struct simple_children *to_simple_children(struct config_item *ite
return item ? container_of(to_config_group(item), struct simple_children, group) : NULL;
}
static struct config_item *simple_children_make_item(struct config_group *group, const char *name)
static int simple_children_make_item(struct config_group *group, const char *name, struct config_item **new_item)
{
struct simple_child *simple_child;
simple_child = kzalloc(sizeof(struct simple_child), GFP_KERNEL);
if (!simple_child)
return NULL;
return -ENOMEM;
config_item_init_type_name(&simple_child->item, name,
@ -287,7 +287,8 @@ static struct config_item *simple_children_make_item(struct config_group *group,
simple_child->storeme = 0;
return &simple_child->item;
*new_item = &simple_child->item;
return 0;
}
static struct configfs_attribute simple_children_attr_description = {
@ -359,20 +360,21 @@ static struct configfs_subsystem simple_children_subsys = {
* children of its own.
*/
static struct config_group *group_children_make_group(struct config_group *group, const char *name)
static int group_children_make_group(struct config_group *group, const char *name, struct config_group **new_group)
{
struct simple_children *simple_children;
simple_children = kzalloc(sizeof(struct simple_children),
GFP_KERNEL);
if (!simple_children)
return NULL;
return -ENOMEM;
config_group_init_type_name(&simple_children->group, name,
&simple_children_type);
return &simple_children->group;
*new_group = &simple_children->group;
return 0;
}
static struct configfs_attribute group_children_attr_description = {

10
drivers/net/netconsole.c
View File

@ -585,8 +585,9 @@ static struct config_item_type netconsole_target_type = {
* Group operations and type for netconsole_subsys.
*/
static struct config_item *make_netconsole_target(struct config_group *group,
const char *name)
static int make_netconsole_target(struct config_group *group,
const char *name,
struct config_item **new_item)
{
unsigned long flags;
struct netconsole_target *nt;
@ -598,7 +599,7 @@ static struct config_item *make_netconsole_target(struct config_group *group,
nt = kzalloc(sizeof(*nt), GFP_KERNEL);
if (!nt) {
printk(KERN_ERR "netconsole: failed to allocate memory\n");
return NULL;
return -ENOMEM;
}
nt->np.name = "netconsole";
@ -615,7 +616,8 @@ static struct config_item *make_netconsole_target(struct config_group *group,
list_add(&nt->list, &target_list);
spin_unlock_irqrestore(&target_list_lock, flags);
return &nt->item;
*new_item = &nt->item;
return 0;
}
static void drop_netconsole_target(struct config_group *group,

8
fs/Kconfig
View File

@ -470,6 +470,14 @@ config OCFS2_FS_USERSPACE_CLUSTER
It is safe to say Y, as the clustering method is run-time
selectable.
config OCFS2_FS_STATS
bool "OCFS2 statistics"
depends on OCFS2_FS
default y
help
This option allows some fs statistics to be captured. Enabling
this option may increase the memory consumption.
config OCFS2_DEBUG_MASKLOG
bool "OCFS2 logging support"
depends on OCFS2_FS

4
fs/configfs/configfs_internal.h
View File

@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/spinlock.h>
struct configfs_dirent {
atomic_t s_count;
@ -47,8 +48,11 @@ struct configfs_dirent {
#define CONFIGFS_USET_DIR 0x0040
#define CONFIGFS_USET_DEFAULT 0x0080
#define CONFIGFS_USET_DROPPING 0x0100
#define CONFIGFS_USET_IN_MKDIR 0x0200
#define CONFIGFS_NOT_PINNED (CONFIGFS_ITEM_ATTR)
extern spinlock_t configfs_dirent_lock;
extern struct vfsmount * configfs_mount;
extern struct kmem_cache *configfs_dir_cachep;

147
fs/configfs/dir.c
View File

@ -30,11 +30,25 @@
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/configfs.h>
#include "configfs_internal.h"
DECLARE_RWSEM(configfs_rename_sem);
/*
* Protects mutations of configfs_dirent linkage together with proper i_mutex
* Also protects mutations of symlinks linkage to target configfs_dirent
* Mutators of configfs_dirent linkage must *both* have the proper inode locked
* and configfs_dirent_lock locked, in that order.
* This allows one to safely traverse configfs_dirent trees and symlinks without
* having to lock inodes.
*
* Protects setting of CONFIGFS_USET_DROPPING: checking the flag
* unlocked is not reliable unless in detach_groups() called from
* rmdir()/unregister() and from configfs_attach_group()
*/
DEFINE_SPINLOCK(configfs_dirent_lock);
static void configfs_d_iput(struct dentry * dentry,
struct inode * inode)
@ -74,13 +88,20 @@ static struct configfs_dirent *configfs_new_dirent(struct configfs_dirent * pare
sd = kmem_cache_zalloc(configfs_dir_cachep, GFP_KERNEL);
if (!sd)
return NULL;
return ERR_PTR(-ENOMEM);
atomic_set(&sd->s_count, 1);
INIT_LIST_HEAD(&sd->s_links);
INIT_LIST_HEAD(&sd->s_children);
list_add(&sd->s_sibling, &parent_sd->s_children);
sd->s_element = element;
spin_lock(&configfs_dirent_lock);
if (parent_sd->s_type & CONFIGFS_USET_DROPPING) {
spin_unlock(&configfs_dirent_lock);
kmem_cache_free(configfs_dir_cachep, sd);
return ERR_PTR(-ENOENT);
}
list_add(&sd->s_sibling, &parent_sd->s_children);
spin_unlock(&configfs_dirent_lock);
return sd;
}
@ -118,8 +139,8 @@ int configfs_make_dirent(struct configfs_dirent * parent_sd,
struct configfs_dirent * sd;
sd = configfs_new_dirent(parent_sd, element);
if (!sd)
return -ENOMEM;
if (IS_ERR(sd))
return PTR_ERR(sd);
sd->s_mode = mode;
sd->s_type = type;
@ -173,7 +194,9 @@ static int create_dir(struct config_item * k, struct dentry * p,
} else {
struct configfs_dirent *sd = d->d_fsdata;
if (sd) {
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_put(sd);
}
}
@ -224,7 +247,9 @@ int configfs_create_link(struct configfs_symlink *sl,
else {
struct configfs_dirent *sd = dentry->d_fsdata;
if (sd) {
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_put(sd);
}
}
@ -238,7 +263,9 @@ static void remove_dir(struct dentry * d)
struct configfs_dirent * sd;
sd = d->d_fsdata;
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_put(sd);
if (d->d_inode)
simple_rmdir(parent->d_inode,d);
@ -331,13 +358,13 @@ static struct dentry * configfs_lookup(struct inode *dir,
/*
* Only subdirectories count here. Files (CONFIGFS_NOT_PINNED) are
* attributes and are removed by rmdir(). We recurse, taking i_mutex
* on all children that are candidates for default detach. If the
* result is clean, then configfs_detach_group() will handle dropping
* i_mutex. If there is an error, the caller will clean up the i_mutex
* holders via configfs_detach_rollback().
* attributes and are removed by rmdir(). We recurse, setting
* CONFIGFS_USET_DROPPING on all children that are candidates for
* default detach.
* If there is an error, the caller will reset the flags via
* configfs_detach_rollback().
*/
static int configfs_detach_prep(struct dentry *dentry)
static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex)
{
struct configfs_dirent *parent_sd = dentry->d_fsdata;
struct configfs_dirent *sd;
@ -352,15 +379,20 @@ static int configfs_detach_prep(struct dentry *dentry)
if (sd->s_type & CONFIGFS_NOT_PINNED)
continue;
if (sd->s_type & CONFIGFS_USET_DEFAULT) {
mutex_lock(&sd->s_dentry->d_inode->i_mutex);
/* Mark that we've taken i_mutex */
/* Abort if racing with mkdir() */
if (sd->s_type & CONFIGFS_USET_IN_MKDIR) {
if (wait_mutex)
*wait_mutex = &sd->s_dentry->d_inode->i_mutex;
return -EAGAIN;
}
/* Mark that we're trying to drop the group */
sd->s_type |= CONFIGFS_USET_DROPPING;
/*
* Yup, recursive. If there's a problem, blame
* deep nesting of default_groups
*/
ret = configfs_detach_prep(sd->s_dentry);
ret = configfs_detach_prep(sd->s_dentry, wait_mutex);
if (!ret)
continue;
} else
@ -374,7 +406,7 @@ static int configfs_detach_prep(struct dentry *dentry)
}
/*
* Walk the tree, dropping i_mutex wherever CONFIGFS_USET_DROPPING is
* Walk the tree, resetting CONFIGFS_USET_DROPPING wherever it was
* set.
*/
static void configfs_detach_rollback(struct dentry *dentry)
@ -385,11 +417,7 @@ static void configfs_detach_rollback(struct dentry *dentry)
list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
if (sd->s_type & CONFIGFS_USET_DEFAULT) {
configfs_detach_rollback(sd->s_dentry);
if (sd->s_type & CONFIGFS_USET_DROPPING) {
sd->s_type &= ~CONFIGFS_USET_DROPPING;
mutex_unlock(&sd->s_dentry->d_inode->i_mutex);
}
sd->s_type &= ~CONFIGFS_USET_DROPPING;
}
}
}
@ -410,7 +438,9 @@ static void detach_attrs(struct config_item * item)
list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
if (!sd->s_element || !(sd->s_type & CONFIGFS_NOT_PINNED))
continue;
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_drop_dentry(sd, dentry);
configfs_put(sd);
}
@ -466,16 +496,12 @@ static void detach_groups(struct config_group *group)
child = sd->s_dentry;
mutex_lock(&child->d_inode->i_mutex);
configfs_detach_group(sd->s_element);
child->d_inode->i_flags |= S_DEAD;
/*
* From rmdir/unregister, a configfs_detach_prep() pass
* has taken our i_mutex for us. Drop it.
* From mkdir/register cleanup, there is no sem held.
*/
if (sd->s_type & CONFIGFS_USET_DROPPING)
mutex_unlock(&child->d_inode->i_mutex);
mutex_unlock(&child->d_inode->i_mutex);
d_delete(child);
dput(child);
@ -1047,25 +1073,24 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
group = NULL;
item = NULL;
if (type->ct_group_ops->make_group) {
group = type->ct_group_ops->make_group(to_config_group(parent_item), name);
if (group) {
ret = type->ct_group_ops->make_group(to_config_group(parent_item), name, &group);
if (!ret) {
link_group(to_config_group(parent_item), group);
item = &group->cg_item;
}
} else {
item = type->ct_group_ops->make_item(to_config_group(parent_item), name);
if (item)
ret = type->ct_group_ops->make_item(to_config_group(parent_item), name, &item);
if (!ret)
link_obj(parent_item, item);
}
mutex_unlock(&subsys->su_mutex);
kfree(name);
if (!item) {
if (ret) {
/*
* If item == NULL, then link_obj() was never called.
* If ret != 0, then link_obj() was never called.
* There are no extra references to clean up.
*/
ret = -ENOMEM;
goto out_put;
}
@ -1093,11 +1118,26 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
*/
module_got = 1;
/*
* Make racing rmdir() fail if it did not tag parent with
* CONFIGFS_USET_DROPPING
* Note: if CONFIGFS_USET_DROPPING is already set, attach_group() will
* fail and let rmdir() terminate correctly
*/
spin_lock(&configfs_dirent_lock);
/* This will make configfs_detach_prep() fail */
sd->s_type |= CONFIGFS_USET_IN_MKDIR;
spin_unlock(&configfs_dirent_lock);
if (group)
ret = configfs_attach_group(parent_item, item, dentry);
else
ret = configfs_attach_item(parent_item, item, dentry);
spin_lock(&configfs_dirent_lock);
sd->s_type &= ~CONFIGFS_USET_IN_MKDIR;
spin_unlock(&configfs_dirent_lock);
out_unlink:
if (ret) {
/* Tear down everything we built up */
@ -1161,12 +1201,27 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
return -EINVAL;
}
ret = configfs_detach_prep(dentry);
if (ret) {
configfs_detach_rollback(dentry);
config_item_put(parent_item);
return ret;
}
spin_lock(&configfs_dirent_lock);
do {
struct mutex *wait_mutex;
ret = configfs_detach_prep(dentry, &wait_mutex);
if (ret) {
configfs_detach_rollback(dentry);
spin_unlock(&configfs_dirent_lock);
if (ret != -EAGAIN) {
config_item_put(parent_item);
return ret;
}
/* Wait until the racing operation terminates */
mutex_lock(wait_mutex);
mutex_unlock(wait_mutex);
spin_lock(&configfs_dirent_lock);
}
} while (ret == -EAGAIN);
spin_unlock(&configfs_dirent_lock);
/* Get a working ref for the duration of this function */
item = configfs_get_config_item(dentry);
@ -1258,7 +1313,7 @@ static int configfs_dir_open(struct inode *inode, struct file *file)
file->private_data = configfs_new_dirent(parent_sd, NULL);
mutex_unlock(&dentry->d_inode->i_mutex);
return file->private_data ? 0 : -ENOMEM;
return IS_ERR(file->private_data) ? PTR_ERR(file->private_data) : 0;
}
@ -1268,7 +1323,9 @@ static int configfs_dir_close(struct inode *inode, struct file *file)
struct configfs_dirent * cursor = file->private_data;
mutex_lock(&dentry->d_inode->i_mutex);
spin_lock(&configfs_dirent_lock);
list_del_init(&cursor->s_sibling);
spin_unlock(&configfs_dirent_lock);
mutex_unlock(&dentry->d_inode->i_mutex);
release_configfs_dirent(cursor);
@ -1308,7 +1365,9 @@ static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir
/* fallthrough */
default:
if (filp->f_pos == 2) {
spin_lock(&configfs_dirent_lock);
list_move(q, &parent_sd->s_children);
spin_unlock(&configfs_dirent_lock);
}
for (p=q->next; p!= &parent_sd->s_children; p=p->next) {
struct configfs_dirent *next;
@ -1331,7 +1390,9 @@ static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir
dt_type(next)) < 0)
return 0;
spin_lock(&configfs_dirent_lock);
list_move(q, p);
spin_unlock(&configfs_dirent_lock);
p = q;
filp->f_pos++;
}
@ -1362,6 +1423,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
struct list_head *p;
loff_t n = file->f_pos - 2;
spin_lock(&configfs_dirent_lock);
list_del(&cursor->s_sibling);
p = sd->s_children.next;
while (n && p != &sd->s_children) {
@ -1373,6 +1435,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
p = p->next;
}
list_add_tail(&cursor->s_sibling, p);
spin_unlock(&configfs_dirent_lock);
}
}
mutex_unlock(&dentry->d_inode->i_mutex);
@ -1448,9 +1511,11 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
I_MUTEX_PARENT);
mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
if (configfs_detach_prep(dentry)) {
spin_lock(&configfs_dirent_lock);
if (configfs_detach_prep(dentry, NULL)) {
printk(KERN_ERR "configfs: Tried to unregister non-empty subsystem!\n");
}
spin_unlock(&configfs_dirent_lock);
configfs_detach_group(&group->cg_item);
dentry->d_inode->i_flags |= S_DEAD;
mutex_unlock(&dentry->d_inode->i_mutex);

2
fs/configfs/inode.c
View File

@ -247,7 +247,9 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
if (!sd->s_element)
continue;
if (!strcmp(configfs_get_name(sd), name)) {
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_drop_dentry(sd, dir);
configfs_put(sd);
break;

16
fs/configfs/symlink.c
View File

@ -77,12 +77,15 @@ static int create_link(struct config_item *parent_item,
sl = kmalloc(sizeof(struct configfs_symlink), GFP_KERNEL);
if (sl) {
sl->sl_target = config_item_get(item);
/* FIXME: needs a lock, I'd bet */
spin_lock(&configfs_dirent_lock);
list_add(&sl->sl_list, &target_sd->s_links);
spin_unlock(&configfs_dirent_lock);
ret = configfs_create_link(sl, parent_item->ci_dentry,
dentry);
if (ret) {
spin_lock(&configfs_dirent_lock);
list_del_init(&sl->sl_list);
spin_unlock(&configfs_dirent_lock);
config_item_put(item);
kfree(sl);
}
@ -137,8 +140,12 @@ int configfs_symlink(struct inode *dir, struct dentry *dentry, const char *symna
goto out_put;
ret = type->ct_item_ops->allow_link(parent_item, target_item);
if (!ret)
if (!ret) {
ret = create_link(parent_item, target_item, dentry);
if (ret && type->ct_item_ops->drop_link)
type->ct_item_ops->drop_link(parent_item,
target_item);
}
config_item_put(target_item);
path_put(&nd.path);
@ -169,7 +176,9 @@ int configfs_unlink(struct inode *dir, struct dentry *dentry)
parent_item = configfs_get_config_item(dentry->d_parent);
type = parent_item->ci_type;
spin_lock(&configfs_dirent_lock);
list_del_init(&sd->s_sibling);
spin_unlock(&configfs_dirent_lock);
configfs_drop_dentry(sd, dentry->d_parent);
dput(dentry);
configfs_put(sd);
@ -184,8 +193,9 @@ int configfs_unlink(struct inode *dir, struct dentry *dentry)
type->ct_item_ops->drop_link(parent_item,
sl->sl_target);
/* FIXME: Needs lock */
spin_lock(&configfs_dirent_lock);
list_del_init(&sl->sl_list);
spin_unlock(&configfs_dirent_lock);
/* Put reference from create_link() */
config_item_put(sl->sl_target);

45
fs/dlm/config.c
View File

@ -41,16 +41,20 @@ struct comm;
struct nodes;
struct node;
static struct config_group *make_cluster(struct config_group *, const char *);
static int make_cluster(struct config_group *, const char *,
struct config_group **);
static void drop_cluster(struct config_group *, struct config_item *);
static void release_cluster(struct config_item *);
static struct config_group *make_space(struct config_group *, const char *);
static int make_space(struct config_group *, const char *,
struct config_group **);
static void drop_space(struct config_group *, struct config_item *);
static void release_space(struct config_item *);
static struct config_item *make_comm(struct config_group *, const char *);
static int make_comm(struct config_group *, const char *,
struct config_item **);
static void drop_comm(struct config_group *, struct config_item *);
static void release_comm(struct config_item *);
static struct config_item *make_node(struct config_group *, const char *);
static int make_node(struct config_group *, const char *,
struct config_item **);
static void drop_node(struct config_group *, struct config_item *);
static void release_node(struct config_item *);
@ -392,8 +396,8 @@ static struct node *to_node(struct config_item *i)
return i ? container_of(i, struct node, item) : NULL;
}
static struct config_group *make_cluster(struct config_group *g,
const char *name)
static int make_cluster(struct config_group *g, const char *name,
struct config_group **new_g)
{
struct cluster *cl = NULL;
struct spaces *sps = NULL;
@ -431,14 +435,15 @@ static struct config_group *make_cluster(struct config_group *g,
space_list = &sps->ss_group;
comm_list = &cms->cs_group;
return &cl->group;
*new_g = &cl->group;
return 0;
fail:
kfree(cl);
kfree(gps);
kfree(sps);
kfree(cms);
return NULL;
return -ENOMEM;
}
static void drop_cluster(struct config_group *g, struct config_item *i)
@ -466,7 +471,8 @@ static void release_cluster(struct config_item *i)
kfree(cl);
}
static struct config_group *make_space(struct config_group *g, const char *name)
static int make_space(struct config_group *g, const char *name,
struct config_group **new_g)
{
struct space *sp = NULL;
struct nodes *nds = NULL;
@ -489,13 +495,14 @@ static struct config_group *make_space(struct config_group *g, const char *name)
INIT_LIST_HEAD(&sp->members);
mutex_init(&sp->members_lock);
sp->members_count = 0;
return &sp->group;
*new_g = &sp->group;
return 0;
fail:
kfree(sp);
kfree(gps);
kfree(nds);
return NULL;
return -ENOMEM;
}
static void drop_space(struct config_group *g, struct config_item *i)
@ -522,19 +529,21 @@ static void release_space(struct config_item *i)
kfree(sp);
}
static struct config_item *make_comm(struct config_group *g, const char *name)
static int make_comm(struct config_group *g, const char *name,
struct config_item **new_i)
{
struct comm *cm;
cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
if (!cm)
return NULL;
return -ENOMEM;
config_item_init_type_name(&cm->item, name, &comm_type);
cm->nodeid = -1;
cm->local = 0;
cm->addr_count = 0;
return &cm->item;
*new_i = &cm->item;
return 0;
}
static void drop_comm(struct config_group *g, struct config_item *i)
@ -554,14 +563,15 @@ static void release_comm(struct config_item *i)
kfree(cm);
}
static struct config_item *make_node(struct config_group *g, const char *name)
static int make_node(struct config_group *g, const char *name,
struct config_item **new_i)
{
struct space *sp = to_space(g->cg_item.ci_parent);
struct node *nd;
nd = kzalloc(sizeof(struct node), GFP_KERNEL);
if (!nd)
return NULL;
return -ENOMEM;
config_item_init_type_name(&nd->item, name, &node_type);
nd->nodeid = -1;
@ -573,7 +583,8 @@ static struct config_item *make_node(struct config_group *g, const char *name)
sp->members_count++;
mutex_unlock(&sp->members_lock);
return &nd->item;
*new_i = &nd->item;
return 0;
}
static void drop_node(struct config_group *g, struct config_item *i)

13
fs/ocfs2/aops.c
View File

@ -174,10 +174,17 @@ static int ocfs2_get_block(struct inode *inode, sector_t iblock,
* need to use BH_New is when we're extending i_size on a file
* system which doesn't support holes, in which case BH_New
* allows block_prepare_write() to zero.
*
* If we see this on a sparse file system, then a truncate has
* raced us and removed the cluster. In this case, we clear
* the buffers dirty and uptodate bits and let the buffer code
* ignore it as a hole.
*/
mlog_bug_on_msg(create && p_blkno == 0 && ocfs2_sparse_alloc(osb),
"ino %lu, iblock %llu\n", inode->i_ino,
(unsigned long long)iblock);
if (create && p_blkno == 0 && ocfs2_sparse_alloc(osb)) {
clear_buffer_dirty(bh_result);
clear_buffer_uptodate(bh_result);
goto bail;
}
/* Treat the unwritten extent as a hole for zeroing purposes. */
if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN))

17
fs/ocfs2/cluster/heartbeat.c
View File

@ -1489,25 +1489,28 @@ static struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct config_group
: NULL;
}
static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *group,
const char *name)
static int o2hb_heartbeat_group_make_item(struct config_group *group,
const char *name,
struct config_item **new_item)
{
struct o2hb_region *reg = NULL;
struct config_item *ret = NULL;
int ret = 0;
reg = kzalloc(sizeof(struct o2hb_region), GFP_KERNEL);
if (reg == NULL)
goto out; /* ENOMEM */
if (reg == NULL) {
ret = -ENOMEM;
goto out;
}
config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
ret = &reg->hr_item;
*new_item = &reg->hr_item;
spin_lock(&o2hb_live_lock);
list_add_tail(&reg->hr_all_item, &o2hb_all_regions);
spin_unlock(&o2hb_live_lock);
out:
if (ret == NULL)
if (ret)
kfree(reg);
return ret;

8
fs/ocfs2/cluster/netdebug.c
View File

@ -146,8 +146,10 @@ static int nst_seq_show(struct seq_file *seq, void *v)
nst->st_task->comm, nst->st_node,
nst->st_sc, nst->st_id, nst->st_msg_type,
nst->st_msg_key,
nst->st_sock_time.tv_sec, nst->st_sock_time.tv_usec,
nst->st_send_time.tv_sec, nst->st_send_time.tv_usec,
nst->st_sock_time.tv_sec,
(unsigned long)nst->st_sock_time.tv_usec,
nst->st_send_time.tv_sec,
(unsigned long)nst->st_send_time.tv_usec,
nst->st_status_time.tv_sec,
nst->st_status_time.tv_usec);
}
@ -274,7 +276,7 @@ static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
return sc; /* unused, just needs to be null when done */
}
#define TV_SEC_USEC(TV) TV.tv_sec, TV.tv_usec
#define TV_SEC_USEC(TV) TV.tv_sec, (unsigned long)TV.tv_usec
static int sc_seq_show(struct seq_file *seq, void *v)
{

45
fs/ocfs2/cluster/nodemanager.c
View File

@ -644,27 +644,32 @@ static ssize_t o2nm_cluster_store(struct config_item *item,
return ret;
}
static struct config_item *o2nm_node_group_make_item(struct config_group *group,
const char *name)
static int o2nm_node_group_make_item(struct config_group *group,
const char *name,
struct config_item **new_item)
{
struct o2nm_node *node = NULL;
struct config_item *ret = NULL;
int ret = 0;
if (strlen(name) > O2NM_MAX_NAME_LEN)
goto out; /* ENAMETOOLONG */
if (strlen(name) > O2NM_MAX_NAME_LEN) {
ret = -ENAMETOOLONG;
goto out;
}
node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL);
if (node == NULL)
goto out; /* ENOMEM */
if (node == NULL) {
ret = -ENOMEM;
goto out;
}
strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */
config_item_init_type_name(&node->nd_item, name, &o2nm_node_type);
spin_lock_init(&node->nd_lock);
ret = &node->nd_item;
*new_item = &node->nd_item;
out:
if (ret == NULL)
if (ret)
kfree(node);
return ret;
@ -751,25 +756,31 @@ static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *gro
}
#endif
static struct config_group *o2nm_cluster_group_make_group(struct config_group *group,
const char *name)
static int o2nm_cluster_group_make_group(struct config_group *group,
const char *name,
struct config_group **new_group)
{
struct o2nm_cluster *cluster = NULL;
struct o2nm_node_group *ns = NULL;
struct config_group *o2hb_group = NULL, *ret = NULL;
struct config_group *o2hb_group = NULL;
void *defs = NULL;
int ret = 0;
/* this runs under the parent dir's i_mutex; there can be only
* one caller in here at a time */
if (o2nm_single_cluster)
goto out; /* ENOSPC */
if (o2nm_single_cluster) {
ret = -ENOSPC;
goto out;
}
cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL);
ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL);
defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
o2hb_group = o2hb_alloc_hb_set();
if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL)
if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) {
ret = -ENOMEM;
goto out;
}
config_group_init_type_name(&cluster->cl_group, name,
&o2nm_cluster_type);
@ -786,11 +797,11 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
cluster->cl_idle_timeout_ms = O2NET_IDLE_TIMEOUT_MS_DEFAULT;
cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT;
ret = &cluster->cl_group;
*new_group = &cluster->cl_group;
o2nm_single_cluster = cluster;
out:
if (ret == NULL) {
if (ret) {
kfree(cluster);
kfree(ns);
o2hb_free_hb_set(o2hb_group);

122
fs/ocfs2/dlmglue.c
View File

@ -31,6 +31,7 @@
#include <linux/pagemap.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/time.h>
#define MLOG_MASK_PREFIX ML_DLM_GLUE
#include <cluster/masklog.h>
@ -59,6 +60,9 @@ struct ocfs2_mask_waiter {
struct completion mw_complete;
unsigned long mw_mask;
unsigned long mw_goal;
#ifdef CONFIG_OCFS2_FS_STATS
unsigned long long mw_lock_start;
#endif
};
static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres);
@ -366,6 +370,75 @@ static void ocfs2_remove_lockres_tracking(struct ocfs2_lock_res *res)
spin_unlock(&ocfs2_dlm_tracking_lock);
}
#ifdef CONFIG_OCFS2_FS_STATS
static void ocfs2_init_lock_stats(struct ocfs2_lock_res *res)
{
res->l_lock_num_prmode = 0;
res->l_lock_num_prmode_failed = 0;
res->l_lock_total_prmode = 0;
res->l_lock_max_prmode = 0;
res->l_lock_num_exmode = 0;
res->l_lock_num_exmode_failed = 0;
res->l_lock_total_exmode = 0;
res->l_lock_max_exmode = 0;
res->l_lock_refresh = 0;
}
static void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level,
struct ocfs2_mask_waiter *mw, int ret)
{
unsigned long long *num, *sum;
unsigned int *max, *failed;
struct timespec ts = current_kernel_time();
unsigned long long time = timespec_to_ns(&ts) - mw->mw_lock_start;
if (level == LKM_PRMODE) {
num = &res->l_lock_num_prmode;
sum = &res->l_lock_total_prmode;
max = &res->l_lock_max_prmode;
failed = &res->l_lock_num_prmode_failed;
} else if (level == LKM_EXMODE) {
num = &res->l_lock_num_exmode;
sum = &res->l_lock_total_exmode;
max = &res->l_lock_max_exmode;
failed = &res->l_lock_num_exmode_failed;
} else
return;
(*num)++;
(*sum) += time;
if (time > *max)
*max = time;
if (ret)
(*failed)++;
}
static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres)
{
lockres->l_lock_refresh++;
}
static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw)
{
struct timespec ts = current_kernel_time();
mw->mw_lock_start = timespec_to_ns(&ts);
}
#else
static inline void ocfs2_init_lock_stats(struct ocfs2_lock_res *res)
{
}
static inline void ocfs2_update_lock_stats(struct ocfs2_lock_res *res,
int level, struct ocfs2_mask_waiter *mw, int ret)
{
}
static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres)
{
}
static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw)
{
}
#endif
static void ocfs2_lock_res_init_common(struct ocfs2_super *osb,
struct ocfs2_lock_res *res,
enum ocfs2_lock_type type,
@ -385,6 +458,8 @@ static void ocfs2_lock_res_init_common(struct ocfs2_super *osb,
res->l_flags = OCFS2_LOCK_INITIALIZED;
ocfs2_add_lockres_tracking(res, osb->osb_dlm_debug);
ocfs2_init_lock_stats(res);
}
void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res)
@ -1048,6 +1123,7 @@ static void ocfs2_init_mask_waiter(struct ocfs2_mask_waiter *mw)
{
INIT_LIST_HEAD(&mw->mw_item);
init_completion(&mw->mw_complete);
ocfs2_init_start_time(mw);
}
static int ocfs2_wait_for_mask(struct ocfs2_mask_waiter *mw)
@ -1254,6 +1330,7 @@ static int ocfs2_cluster_lock(struct ocfs2_super *osb,
goto again;
mlog_errno(ret);
}
ocfs2_update_lock_stats(lockres, level, &mw, ret);
mlog_exit(ret);
return ret;
@ -1983,6 +2060,7 @@ static int ocfs2_inode_lock_update(struct inode *inode,
le32_to_cpu(fe->i_flags));
ocfs2_refresh_inode(inode, fe);
ocfs2_track_lock_refresh(lockres);
}
status = 0;
@ -2267,6 +2345,7 @@ int ocfs2_super_lock(struct ocfs2_super *osb,
if (status < 0)
mlog_errno(status);
ocfs2_track_lock_refresh(lockres);
}
bail:
mlog_exit(status);
@ -2461,7 +2540,7 @@ static void *ocfs2_dlm_seq_next(struct seq_file *m, void *v, loff_t *pos)
}
/* So that debugfs.ocfs2 can determine which format is being used */
#define OCFS2_DLM_DEBUG_STR_VERSION 1
#define OCFS2_DLM_DEBUG_STR_VERSION 2
static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
{
int i;
@ -2502,6 +2581,47 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
for(i = 0; i < DLM_LVB_LEN; i++)
seq_printf(m, "0x%x\t", lvb[i]);
#ifdef CONFIG_OCFS2_FS_STATS
# define lock_num_prmode(_l) (_l)->l_lock_num_prmode
# define lock_num_exmode(_l) (_l)->l_lock_num_exmode
# define lock_num_prmode_failed(_l) (_l)->l_lock_num_prmode_failed
# define lock_num_exmode_failed(_l) (_l)->l_lock_num_exmode_failed
# define lock_total_prmode(_l) (_l)->l_lock_total_prmode
# define lock_total_exmode(_l) (_l)->l_lock_total_exmode
# define lock_max_prmode(_l) (_l)->l_lock_max_prmode
# define lock_max_exmode(_l) (_l)->l_lock_max_exmode
# define lock_refresh(_l) (_l)->l_lock_refresh
#else
# define lock_num_prmode(_l) (0ULL)
# define lock_num_exmode(_l) (0ULL)
# define lock_num_prmode_failed(_l) (0)
# define lock_num_exmode_failed(_l) (0)
# define lock_total_prmode(_l) (0ULL)
# define lock_total_exmode(_l) (0ULL)
# define lock_max_prmode(_l) (0)
# define lock_max_exmode(_l) (0)
# define lock_refresh(_l) (0)
#endif
/* The following seq_print was added in version 2 of this output */
seq_printf(m, "%llu\t"
"%llu\t"
"%u\t"
"%u\t"
"%llu\t"
"%llu\t"
"%u\t"
"%u\t"
"%u\t",
lock_num_prmode(lockres),
lock_num_exmode(lockres),
lock_num_prmode_failed(lockres),
lock_num_exmode_failed(lockres),
lock_total_prmode(lockres),
lock_total_exmode(lockres),
lock_max_prmode(lockres),
lock_max_exmode(lockres),
lock_refresh(lockres));
/* End the line */
seq_printf(m, "\n");
return 0;

2
fs/ocfs2/file.c
View File

@ -2202,7 +2202,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
if (ret == -EINVAL)
mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n");
mlog(0, "generic_file_aio_read returned -EINVAL\n");
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));

2
fs/ocfs2/journal.c
View File

@ -329,7 +329,7 @@ int ocfs2_extend_trans(handle_t *handle, int nblocks)
mlog(0, "Trying to extend transaction by %d blocks\n", nblocks);
#ifdef OCFS2_DEBUG_FS
#ifdef CONFIG_OCFS2_DEBUG_FS
status = 1;
#else
status = journal_extend(handle, nblocks);

2
fs/ocfs2/localalloc.c
View File

@ -498,7 +498,7 @@ int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb,
alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
#ifdef OCFS2_DEBUG_FS
#ifdef CONFIG_OCFS2_DEBUG_FS
if (le32_to_cpu(alloc->id1.bitmap1.i_used) !=
ocfs2_local_alloc_count_bits(alloc)) {
ocfs2_error(osb->sb, "local alloc inode %llu says it has "

12
fs/ocfs2/ocfs2.h
View File

@ -132,6 +132,18 @@ struct ocfs2_lock_res {
wait_queue_head_t l_event;
struct list_head l_debug_list;
#ifdef CONFIG_OCFS2_FS_STATS
unsigned long long l_lock_num_prmode; /* PR acquires */
unsigned long long l_lock_num_exmode; /* EX acquires */
unsigned int l_lock_num_prmode_failed; /* Failed PR gets */
unsigned int l_lock_num_exmode_failed; /* Failed EX gets */
unsigned long long l_lock_total_prmode; /* Tot wait for PR */
unsigned long long l_lock_total_exmode; /* Tot wait for EX */
unsigned int l_lock_max_prmode; /* Max wait for PR */
unsigned int l_lock_max_exmode; /* Max wait for EX */
unsigned int l_lock_refresh; /* Disk refreshes */
#endif
};
struct ocfs2_dlm_debug {

2
fs/ocfs2/ocfs2_fs.h
View File

@ -901,7 +901,7 @@ static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
* list has a copy per slot.
*/
if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
chars = snprintf(buf, len,
chars = snprintf(buf, len, "%s",
ocfs2_system_inodes[type].si_name);
else
chars = snprintf(buf, len,

19
fs/ocfs2/stack_user.c
View File

@ -550,26 +550,17 @@ static ssize_t ocfs2_control_read(struct file *file,
size_t count,
loff_t *ppos)
{
char *proto_string = OCFS2_CONTROL_PROTO;
size_t to_write = 0;
ssize_t ret;
if (*ppos >= OCFS2_CONTROL_PROTO_LEN)
return 0;
to_write = OCFS2_CONTROL_PROTO_LEN - *ppos;
if (to_write > count)
to_write = count;
if (copy_to_user(buf, proto_string + *ppos, to_write))
return -EFAULT;
*ppos += to_write;
ret = simple_read_from_buffer(buf, count, ppos,
OCFS2_CONTROL_PROTO, OCFS2_CONTROL_PROTO_LEN);
/* Have we read the whole protocol list? */
if (*ppos >= OCFS2_CONTROL_PROTO_LEN)
if (ret > 0 && *ppos >= OCFS2_CONTROL_PROTO_LEN)
ocfs2_control_set_handshake_state(file,
OCFS2_CONTROL_HANDSHAKE_READ);
return to_write;
return ret;
}
static int ocfs2_control_release(struct inode *inode, struct file *file)

6
fs/ocfs2/super.c
View File

@ -1703,7 +1703,11 @@ static int ocfs2_check_volume(struct ocfs2_super *osb)
local = ocfs2_mount_local(osb);
/* will play back anything left in the journal. */
ocfs2_journal_load(osb->journal, local);
status = ocfs2_journal_load(osb->journal, local);
if (status < 0) {
mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
goto finally;
}
if (dirty) {
/* recover my local alloc if we didn't unmount cleanly. */

4
include/linux/configfs.h
View File

@ -165,8 +165,8 @@ struct configfs_item_operations {
};
struct configfs_group_operations {
struct config_item *(*make_item)(struct config_group *group, const char *name);
struct config_group *(*make_group)(struct config_group *group, const char *name);
int (*make_item)(struct config_group *group, const char *name, struct config_item **new_item);
int (*make_group)(struct config_group *group, const char *name, struct config_group **new_group);
int (*commit_item)(struct config_item *item);
void (*disconnect_notify)(struct config_group *group, struct config_item *item);
void (*drop_item)(struct config_group *group, struct config_item *item);