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Merge git://git.linux-nfs.org/pub/linux/nfs-2.6

Browse Source 
* git://git.linux-nfs.org/pub/linux/nfs-2.6:
  NFSv4: Fix an rpc_cred reference leakage in fs/nfs/delegation.c
  NFSv4: Ensure that we wait for the CLOSE request to complete
  NFS: Fix a race in sillyrename
  NFS: Fix a writeback race...
This commit is contained in:
Linus Torvalds 2007-10-19 14:31:42 -07:00
commit b04cde34cf
10 changed files with 184 additions and 37 deletions
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3
fs/nfs/delegation.c
View File

@ -168,7 +168,8 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
spin_unlock(&inode->i_lock);
spin_unlock(&clp->cl_lock);
kfree(delegation);
if (delegation != NULL)
nfs_free_delegation(delegation);
return status;
}

14
fs/nfs/dir.c
View File

@ -562,6 +562,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
nfs_fattr_init(&fattr);
desc->entry = &my_entry;
nfs_block_sillyrename(dentry);
while(!desc->entry->eof) {
res = readdir_search_pagecache(desc);
@ -592,6 +593,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
break;
}
}
nfs_unblock_sillyrename(dentry);
unlock_kernel();
if (res > 0)
res = 0;
@ -866,6 +868,7 @@ struct dentry_operations nfs_dentry_operations = {
static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
{
struct dentry *res;
struct dentry *parent;
struct inode *inode = NULL;
int error;
struct nfs_fh fhandle;
@ -894,26 +897,31 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
goto out_unlock;
}
parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
nfs_block_sillyrename(parent);
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);
if (error == -ENOENT)
goto no_entry;
if (error < 0) {
res = ERR_PTR(error);
goto out_unlock;
goto out_unblock_sillyrename;
}
inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr);
res = (struct dentry *)inode;
if (IS_ERR(res))
goto out_unlock;
goto out_unblock_sillyrename;
no_entry:
res = d_materialise_unique(dentry, inode);
if (res != NULL) {
if (IS_ERR(res))
goto out_unlock;
goto out_unblock_sillyrename;
dentry = res;
}
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
out_unblock_sillyrename:
nfs_unblock_sillyrename(parent);
out_unlock:
unlock_kernel();
out:

2
fs/nfs/file.c
View File

@ -131,7 +131,7 @@ nfs_file_release(struct inode *inode, struct file *filp)
{
/* Ensure that dirty pages are flushed out with the right creds */
if (filp->f_mode & FMODE_WRITE)
filemap_fdatawrite(filp->f_mapping);
nfs_wb_all(filp->f_path.dentry->d_inode);
nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
return NFS_PROTO(inode)->file_release(inode, filp);
}

25
fs/nfs/inode.c
View File

@ -514,7 +514,7 @@ struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
return ctx;
}
void put_nfs_open_context(struct nfs_open_context *ctx)
static void __put_nfs_open_context(struct nfs_open_context *ctx, int wait)
{
struct inode *inode = ctx->path.dentry->d_inode;
@ -522,8 +522,12 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
return;
list_del(&ctx->list);
spin_unlock(&inode->i_lock);
if (ctx->state != NULL)
nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
if (ctx->state != NULL) {
if (wait)
nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
else
nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
}
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
dput(ctx->path.dentry);
@ -531,6 +535,16 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
kfree(ctx);
}
void put_nfs_open_context(struct nfs_open_context *ctx)
{
__put_nfs_open_context(ctx, 0);
}
static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
{
__put_nfs_open_context(ctx, 1);
}
/*
* Ensure that mmap has a recent RPC credential for use when writing out
* shared pages
@ -577,7 +591,7 @@ static void nfs_file_clear_open_context(struct file *filp)
spin_lock(&inode->i_lock);
list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
spin_unlock(&inode->i_lock);
put_nfs_open_context(ctx);
put_nfs_open_context_sync(ctx);
}
}
@ -1169,6 +1183,9 @@ static void init_once(struct kmem_cache * cachep, void *foo)
INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
nfsi->ncommit = 0;
nfsi->npages = 0;
atomic_set(&nfsi->silly_count, 1);
INIT_HLIST_HEAD(&nfsi->silly_list);
init_waitqueue_head(&nfsi->waitqueue);
nfs4_init_once(nfsi);
}

3
fs/nfs/nfs4_fs.h
View File

@ -178,7 +178,7 @@ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struc
extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct path *path, struct nfs4_state *state);
extern int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait);
extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
@ -209,6 +209,7 @@ extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
extern void nfs4_put_open_state(struct nfs4_state *);
extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
extern void nfs4_close_sync(struct path *, struct nfs4_state *, mode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);

19
fs/nfs/nfs4proc.c
View File

@ -1305,7 +1305,7 @@ static const struct rpc_call_ops nfs4_close_ops = {
*
* NOTE: Caller must be holding the sp->so_owner semaphore!
*/
int nfs4_do_close(struct path *path, struct nfs4_state *state)
int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_closedata *calldata;
@ -1333,8 +1333,11 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state)
task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
if (IS_ERR(task))
return PTR_ERR(task);
status = 0;
if (wait)
status = rpc_wait_for_completion_task(task);
rpc_put_task(task);
return 0;
return status;
out_free_calldata:
kfree(calldata);
out:
@ -1365,13 +1368,14 @@ static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct
}
ret = PTR_ERR(filp);
out_close:
nfs4_close_state(path, state, nd->intent.open.flags);
nfs4_close_sync(path, state, nd->intent.open.flags);
return ret;
}
struct dentry *
nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
struct dentry *parent;
struct path path = {
.mnt = nd->mnt,
.dentry = dentry,
@ -1394,6 +1398,9 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
if (IS_ERR(cred))
return (struct dentry *)cred;
parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
nfs_block_sillyrename(parent);
state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
put_rpccred(cred);
if (IS_ERR(state)) {
@ -1401,12 +1408,14 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
d_add(dentry, NULL);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
}
nfs_unblock_sillyrename(parent);
return (struct dentry *)state;
}
res = d_add_unique(dentry, igrab(state->inode));
if (res != NULL)
path.dentry = res;
nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
nfs_unblock_sillyrename(parent);
nfs4_intent_set_file(nd, &path, state);
return res;
}
@ -1444,7 +1453,7 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st
nfs4_intent_set_file(nd, &path, state);
return 1;
}
nfs4_close_state(&path, state, openflags);
nfs4_close_sync(&path, state, openflags);
out_drop:
d_drop(dentry);
return 0;
@ -1898,7 +1907,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
status = nfs4_intent_set_file(nd, &path, state);
else
nfs4_close_state(&path, state, flags);
nfs4_close_sync(&path, state, flags);
out:
return status;
}

14
fs/nfs/nfs4state.c
View File

@ -425,7 +425,7 @@ void nfs4_put_open_state(struct nfs4_state *state)
/*
* Close the current file.
*/
void nfs4_close_state(struct path *path, struct nfs4_state *state, mode_t mode)
static void __nfs4_close(struct path *path, struct nfs4_state *state, mode_t mode, int wait)
{
struct nfs4_state_owner *owner = state->owner;
int call_close = 0;
@ -466,7 +466,17 @@ void nfs4_close_state(struct path *path, struct nfs4_state *state, mode_t mode)
nfs4_put_open_state(state);
nfs4_put_state_owner(owner);
} else
nfs4_do_close(path, state);
nfs4_do_close(path, state, wait);
}
void nfs4_close_state(struct path *path, struct nfs4_state *state, mode_t mode)
{
__nfs4_close(path, state, mode, 0);
}
void nfs4_close_sync(struct path *path, struct nfs4_state *state, mode_t mode)
{
__nfs4_close(path, state, mode, 1);
}
/*

116
fs/nfs/unlink.c
View File

@ -14,6 +14,7 @@
struct nfs_unlinkdata {
struct hlist_node list;
struct nfs_removeargs args;
struct nfs_removeres res;
struct inode *dir;
@ -52,6 +53,20 @@ static int nfs_copy_dname(struct dentry *dentry, struct nfs_unlinkdata *data)
return 0;
}
static void nfs_free_dname(struct nfs_unlinkdata *data)
{
kfree(data->args.name.name);
data->args.name.name = NULL;
data->args.name.len = 0;
}
static void nfs_dec_sillycount(struct inode *dir)
{
struct nfs_inode *nfsi = NFS_I(dir);
if (atomic_dec_return(&nfsi->silly_count) == 1)
wake_up(&nfsi->waitqueue);
}
/**
* nfs_async_unlink_init - Initialize the RPC info
* task: rpc_task of the sillydelete
@ -95,6 +110,8 @@ static void nfs_async_unlink_done(struct rpc_task *task, void *calldata)
static void nfs_async_unlink_release(void *calldata)
{
struct nfs_unlinkdata *data = calldata;
nfs_dec_sillycount(data->dir);
nfs_free_unlinkdata(data);
}
@ -104,24 +121,35 @@ static const struct rpc_call_ops nfs_unlink_ops = {
.rpc_release = nfs_async_unlink_release,
};
static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data)
static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct nfs_unlinkdata *data)
{
struct rpc_task *task;
struct dentry *parent;
struct inode *dir;
struct dentry *alias;
if (nfs_copy_dname(dentry, data) < 0)
goto out_free;
parent = dget_parent(dentry);
if (parent == NULL)
goto out_free;
dir = igrab(parent->d_inode);
dput(parent);
if (dir == NULL)
goto out_free;
data->dir = dir;
alias = d_lookup(parent, &data->args.name);
if (alias != NULL) {
int ret = 0;
/*
* Hey, we raced with lookup... See if we need to transfer
* the sillyrename information to the aliased dentry.
*/
nfs_free_dname(data);
spin_lock(&alias->d_lock);
if (!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
alias->d_fsdata = data;
alias->d_flags ^= DCACHE_NFSFS_RENAMED;
ret = 1;
}
spin_unlock(&alias->d_lock);
nfs_dec_sillycount(dir);
dput(alias);
return ret;
}
data->dir = igrab(dir);
if (!data->dir) {
nfs_dec_sillycount(dir);
return 0;
}
data->args.fh = NFS_FH(dir);
nfs_fattr_init(&data->res.dir_attr);
@ -129,8 +157,64 @@ static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data)
if (!IS_ERR(task))
rpc_put_task(task);
return 1;
}
static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data)
{
struct dentry *parent;
struct inode *dir;
int ret = 0;
parent = dget_parent(dentry);
if (parent == NULL)
goto out_free;
dir = parent->d_inode;
if (nfs_copy_dname(dentry, data) == 0)
goto out_dput;
/* Non-exclusive lock protects against concurrent lookup() calls */
spin_lock(&dir->i_lock);
if (atomic_inc_not_zero(&NFS_I(dir)->silly_count) == 0) {
/* Deferred delete */
hlist_add_head(&data->list, &NFS_I(dir)->silly_list);
spin_unlock(&dir->i_lock);
ret = 1;
goto out_dput;
}
spin_unlock(&dir->i_lock);
ret = nfs_do_call_unlink(parent, dir, data);
out_dput:
dput(parent);
out_free:
return 0;
return ret;
}
void nfs_block_sillyrename(struct dentry *dentry)
{
struct nfs_inode *nfsi = NFS_I(dentry->d_inode);
wait_event(nfsi->waitqueue, atomic_cmpxchg(&nfsi->silly_count, 1, 0) == 1);
}
void nfs_unblock_sillyrename(struct dentry *dentry)
{
struct inode *dir = dentry->d_inode;
struct nfs_inode *nfsi = NFS_I(dir);
struct nfs_unlinkdata *data;
atomic_inc(&nfsi->silly_count);
spin_lock(&dir->i_lock);
while (!hlist_empty(&nfsi->silly_list)) {
if (!atomic_inc_not_zero(&nfsi->silly_count))
break;
data = hlist_entry(nfsi->silly_list.first, struct nfs_unlinkdata, list);
hlist_del(&data->list);
spin_unlock(&dir->i_lock);
if (nfs_do_call_unlink(dentry, dir, data) == 0)
nfs_free_unlinkdata(data);
spin_lock(&dir->i_lock);
}
spin_unlock(&dir->i_lock);
}
/**

17
fs/nfs/write.c
View File

@ -174,8 +174,6 @@ static void nfs_mark_uptodate(struct page *page, unsigned int base, unsigned int
return;
if (count != nfs_page_length(page))
return;
if (count != PAGE_CACHE_SIZE)
zero_user_page(page, count, PAGE_CACHE_SIZE - count, KM_USER0);
SetPageUptodate(page);
}
@ -627,7 +625,8 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
return ERR_PTR(error);
}
spin_unlock(&inode->i_lock);
return new;
req = new;
goto zero_page;
}
spin_unlock(&inode->i_lock);
@ -655,13 +654,23 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
if (offset < req->wb_offset) {
req->wb_offset = offset;
req->wb_pgbase = offset;
req->wb_bytes = rqend - req->wb_offset;
req->wb_bytes = max(end, rqend) - req->wb_offset;
goto zero_page;
}
if (end > rqend)
req->wb_bytes = end - req->wb_offset;
return req;
zero_page:
/* If this page might potentially be marked as up to date,
* then we need to zero any uninitalised data. */
if (req->wb_pgbase == 0 && req->wb_bytes != PAGE_CACHE_SIZE
&& !PageUptodate(req->wb_page))
zero_user_page(req->wb_page, req->wb_bytes,
PAGE_CACHE_SIZE - req->wb_bytes,
KM_USER0);
return req;
}
int nfs_flush_incompatible(struct file *file, struct page *page)

8
include/linux/nfs_fs.h
View File

@ -160,6 +160,12 @@ struct nfs_inode {
/* Open contexts for shared mmap writes */
struct list_head open_files;
/* Number of in-flight sillydelete RPC calls */
atomic_t silly_count;
/* List of deferred sillydelete requests */
struct hlist_head silly_list;
wait_queue_head_t waitqueue;
#ifdef CONFIG_NFS_V4
struct nfs4_cached_acl *nfs4_acl;
/* NFSv4 state */
@ -394,6 +400,8 @@ extern void nfs_release_automount_timer(void);
*/
extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
extern void nfs_block_sillyrename(struct dentry *dentry);
extern void nfs_unblock_sillyrename(struct dentry *dentry);
/*
* linux/fs/nfs/write.c