Commit 15eb7105 authored by Linus Torvalds's avatar Linus Torvalds

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
parents a5d17928 cef0893d
......@@ -45,6 +45,7 @@ obj-$(CONFIG_DNOTIFY) += dnotify.o
obj-$(CONFIG_PROC_FS) += proc/
obj-y += partitions/
obj-$(CONFIG_SYSFS) += sysfs/
obj-$(CONFIG_CONFIGFS_FS) += configfs/
obj-y += devpts/
obj-$(CONFIG_PROFILING) += dcookies.o
......@@ -100,5 +101,4 @@ obj-$(CONFIG_BEFS_FS) += befs/
obj-$(CONFIG_HOSTFS) += hostfs/
obj-$(CONFIG_HPPFS) += hppfs/
obj-$(CONFIG_DEBUG_FS) += debugfs/
obj-$(CONFIG_CONFIGFS_FS) += configfs/
obj-$(CONFIG_OCFS2_FS) += ocfs2/
......@@ -505,13 +505,15 @@ static int populate_groups(struct config_group *group)
int i;
if (group->default_groups) {
/* FYI, we're faking mkdir here
/*
* FYI, we're faking mkdir here
* I'm not sure we need this semaphore, as we're called
* from our parent's mkdir. That holds our parent's
* i_mutex, so afaik lookup cannot continue through our
* parent to find us, let alone mess with our tree.
* That said, taking our i_mutex is closer to mkdir
* emulation, and shouldn't hurt. */
* emulation, and shouldn't hurt.
*/
mutex_lock(&dentry->d_inode->i_mutex);
for (i = 0; group->default_groups[i]; i++) {
......@@ -546,20 +548,34 @@ static void unlink_obj(struct config_item *item)
item->ci_group = NULL;
item->ci_parent = NULL;
/* Drop the reference for ci_entry */
config_item_put(item);
/* Drop the reference for ci_parent */
config_group_put(group);
}
}
static void link_obj(struct config_item *parent_item, struct config_item *item)
{
/* Parent seems redundant with group, but it makes certain
* traversals much nicer. */
/*
* Parent seems redundant with group, but it makes certain
* traversals much nicer.
*/
item->ci_parent = parent_item;
/*
* We hold a reference on the parent for the child's ci_parent
* link.
*/
item->ci_group = config_group_get(to_config_group(parent_item));
list_add_tail(&item->ci_entry, &item->ci_group->cg_children);
/*
* We hold a reference on the child for ci_entry on the parent's
* cg_children
*/
config_item_get(item);
}
......@@ -684,6 +700,10 @@ static void client_drop_item(struct config_item *parent_item,
type = parent_item->ci_type;
BUG_ON(!type);
/*
* If ->drop_item() exists, it is responsible for the
* config_item_put().
*/
if (type->ct_group_ops && type->ct_group_ops->drop_item)
type->ct_group_ops->drop_item(to_config_group(parent_item),
item);
......@@ -694,23 +714,28 @@ static void client_drop_item(struct config_item *parent_item,
static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
int ret;
int ret, module_got = 0;
struct config_group *group;
struct config_item *item;
struct config_item *parent_item;
struct configfs_subsystem *subsys;
struct configfs_dirent *sd;
struct config_item_type *type;
struct module *owner;
struct module *owner = NULL;
char *name;
if (dentry->d_parent == configfs_sb->s_root)
return -EPERM;
if (dentry->d_parent == configfs_sb->s_root) {
ret = -EPERM;
goto out;
}
sd = dentry->d_parent->d_fsdata;
if (!(sd->s_type & CONFIGFS_USET_DIR))
return -EPERM;
if (!(sd->s_type & CONFIGFS_USET_DIR)) {
ret = -EPERM;
goto out;
}
/* Get a working ref for the duration of this function */
parent_item = configfs_get_config_item(dentry->d_parent);
type = parent_item->ci_type;
subsys = to_config_group(parent_item)->cg_subsys;
......@@ -719,15 +744,16 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
if (!type || !type->ct_group_ops ||
(!type->ct_group_ops->make_group &&
!type->ct_group_ops->make_item)) {
config_item_put(parent_item);
return -EPERM; /* What lack-of-mkdir returns */
ret = -EPERM; /* Lack-of-mkdir returns -EPERM */
goto out_put;
}
name = kmalloc(dentry->d_name.len + 1, GFP_KERNEL);
if (!name) {
config_item_put(parent_item);
return -ENOMEM;
ret = -ENOMEM;
goto out_put;
}
snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);
down(&subsys->su_sem);
......@@ -748,40 +774,67 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
kfree(name);
if (!item) {
config_item_put(parent_item);
return -ENOMEM;
/*
* If item == NULL, then link_obj() was never called.
* There are no extra references to clean up.
*/
ret = -ENOMEM;
goto out_put;
}
ret = -EINVAL;
/*
* link_obj() has been called (via link_group() for groups).
* From here on out, errors must clean that up.
*/
type = item->ci_type;
if (type) {
owner = type->ct_owner;
if (try_module_get(owner)) {
if (group) {
ret = configfs_attach_group(parent_item,
item,
dentry);
} else {
ret = configfs_attach_item(parent_item,
item,
dentry);
}
if (!type) {
ret = -EINVAL;
goto out_unlink;
}
if (ret) {
down(&subsys->su_sem);
if (group)
unlink_group(group);
else
unlink_obj(item);
client_drop_item(parent_item, item);
up(&subsys->su_sem);
owner = type->ct_owner;
if (!try_module_get(owner)) {
ret = -EINVAL;
goto out_unlink;
}
config_item_put(parent_item);
module_put(owner);
}
}
/*
* I hate doing it this way, but if there is
* an error, module_put() probably should
* happen after any cleanup.
*/
module_got = 1;
if (group)
ret = configfs_attach_group(parent_item, item, dentry);
else
ret = configfs_attach_item(parent_item, item, dentry);
out_unlink:
if (ret) {
/* Tear down everything we built up */
down(&subsys->su_sem);
if (group)
unlink_group(group);
else
unlink_obj(item);
client_drop_item(parent_item, item);
up(&subsys->su_sem);
if (module_got)
module_put(owner);
}
out_put:
/*
* link_obj()/link_group() took a reference from child->parent,
* so the parent is safely pinned. We can drop our working
* reference.
*/
config_item_put(parent_item);
out:
return ret;
}
......@@ -801,6 +854,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
if (sd->s_type & CONFIGFS_USET_DEFAULT)
return -EPERM;
/* Get a working ref until we have the child */
parent_item = configfs_get_config_item(dentry->d_parent);
subsys = to_config_group(parent_item)->cg_subsys;
BUG_ON(!subsys);
......@@ -817,6 +871,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
return ret;
}
/* Get a working ref for the duration of this function */
item = configfs_get_config_item(dentry);
/* Drop reference from above, item already holds one. */
......
......@@ -276,13 +276,29 @@ static int ocfs2_writepage(struct page *page, struct writeback_control *wbc)
return ret;
}
/* This can also be called from ocfs2_write_zero_page() which has done
* it's own cluster locking. */
int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
unsigned from, unsigned to)
{
int ret;
down_read(&OCFS2_I(inode)->ip_alloc_sem);
ret = block_prepare_write(page, from, to, ocfs2_get_block);
up_read(&OCFS2_I(inode)->ip_alloc_sem);
return ret;
}
/*
* 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().
*/
int ocfs2_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
static int ocfs2_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
struct inode *inode = page->mapping->host;
int ret;
......@@ -295,11 +311,7 @@ int ocfs2_prepare_write(struct file *file, struct page *page,
goto out;
}
down_read(&OCFS2_I(inode)->ip_alloc_sem);
ret = block_prepare_write(page, from, to, ocfs2_get_block);
up_read(&OCFS2_I(inode)->ip_alloc_sem);
ret = ocfs2_prepare_write_nolock(inode, page, from, to);
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 @@ static int ocfs2_extend_allocation(struct inode *inode,
/* 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 @@ static int ocfs2_zero_extend(struct inode *inode,
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) {
ret = ocfs2_extend_allocation(inode, 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_zero_extend(inode, new_i_size);
ret = ocfs2_extend_allocation(inode, clusters_to_add);
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;
ret = ocfs2_zero_extend(inode, (u64)new_i_size - tail_to_skip);
if (ret < 0) {
mlog_errno(ret);
goto out_unlock;
}
}
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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