mirror of https://gitee.com/openkylin/linux.git
Merge git://git.linux-nfs.org/pub/linux/nfs-2.6
* 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
commit
b04cde34cf
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@ -168,7 +168,8 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
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spin_unlock(&inode->i_lock);
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spin_unlock(&clp->cl_lock);
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kfree(delegation);
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if (delegation != NULL)
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nfs_free_delegation(delegation);
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return status;
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}
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14
fs/nfs/dir.c
14
fs/nfs/dir.c
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@ -562,6 +562,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
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nfs_fattr_init(&fattr);
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desc->entry = &my_entry;
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nfs_block_sillyrename(dentry);
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while(!desc->entry->eof) {
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res = readdir_search_pagecache(desc);
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@ -592,6 +593,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
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break;
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}
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}
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nfs_unblock_sillyrename(dentry);
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unlock_kernel();
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if (res > 0)
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res = 0;
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@ -866,6 +868,7 @@ struct dentry_operations nfs_dentry_operations = {
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static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
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{
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struct dentry *res;
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struct dentry *parent;
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struct inode *inode = NULL;
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int error;
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struct nfs_fh fhandle;
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@ -894,26 +897,31 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
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goto out_unlock;
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}
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parent = dentry->d_parent;
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/* Protect against concurrent sillydeletes */
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nfs_block_sillyrename(parent);
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error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);
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if (error == -ENOENT)
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goto no_entry;
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if (error < 0) {
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res = ERR_PTR(error);
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goto out_unlock;
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goto out_unblock_sillyrename;
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}
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inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr);
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res = (struct dentry *)inode;
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if (IS_ERR(res))
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goto out_unlock;
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goto out_unblock_sillyrename;
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no_entry:
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res = d_materialise_unique(dentry, inode);
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if (res != NULL) {
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if (IS_ERR(res))
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goto out_unlock;
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goto out_unblock_sillyrename;
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dentry = res;
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}
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nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
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out_unblock_sillyrename:
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nfs_unblock_sillyrename(parent);
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out_unlock:
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unlock_kernel();
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out:
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@ -131,7 +131,7 @@ nfs_file_release(struct inode *inode, struct file *filp)
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{
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/* Ensure that dirty pages are flushed out with the right creds */
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if (filp->f_mode & FMODE_WRITE)
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filemap_fdatawrite(filp->f_mapping);
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nfs_wb_all(filp->f_path.dentry->d_inode);
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nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
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return NFS_PROTO(inode)->file_release(inode, filp);
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}
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@ -514,7 +514,7 @@ struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
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return ctx;
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}
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void put_nfs_open_context(struct nfs_open_context *ctx)
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static void __put_nfs_open_context(struct nfs_open_context *ctx, int wait)
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{
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struct inode *inode = ctx->path.dentry->d_inode;
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@ -522,8 +522,12 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
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return;
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list_del(&ctx->list);
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spin_unlock(&inode->i_lock);
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if (ctx->state != NULL)
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nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
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if (ctx->state != NULL) {
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if (wait)
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nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
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else
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nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
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}
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if (ctx->cred != NULL)
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put_rpccred(ctx->cred);
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dput(ctx->path.dentry);
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@ -531,6 +535,16 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
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kfree(ctx);
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}
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void put_nfs_open_context(struct nfs_open_context *ctx)
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{
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__put_nfs_open_context(ctx, 0);
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}
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static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
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{
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__put_nfs_open_context(ctx, 1);
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}
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/*
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* Ensure that mmap has a recent RPC credential for use when writing out
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* shared pages
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@ -577,7 +591,7 @@ static void nfs_file_clear_open_context(struct file *filp)
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spin_lock(&inode->i_lock);
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list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
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spin_unlock(&inode->i_lock);
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put_nfs_open_context(ctx);
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put_nfs_open_context_sync(ctx);
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}
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}
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@ -1169,6 +1183,9 @@ static void init_once(struct kmem_cache * cachep, void *foo)
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INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
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nfsi->ncommit = 0;
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nfsi->npages = 0;
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atomic_set(&nfsi->silly_count, 1);
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INIT_HLIST_HEAD(&nfsi->silly_list);
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init_waitqueue_head(&nfsi->waitqueue);
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nfs4_init_once(nfsi);
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}
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@ -178,7 +178,7 @@ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struc
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extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
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extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
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extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
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extern int nfs4_do_close(struct path *path, struct nfs4_state *state);
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extern int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait);
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extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
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extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
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extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
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@ -209,6 +209,7 @@ extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
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extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
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extern void nfs4_put_open_state(struct nfs4_state *);
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extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
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extern void nfs4_close_sync(struct path *, struct nfs4_state *, mode_t);
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extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
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extern void nfs4_schedule_state_recovery(struct nfs_client *);
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extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
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@ -1305,7 +1305,7 @@ static const struct rpc_call_ops nfs4_close_ops = {
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*
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* NOTE: Caller must be holding the sp->so_owner semaphore!
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*/
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int nfs4_do_close(struct path *path, struct nfs4_state *state)
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int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
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{
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struct nfs_server *server = NFS_SERVER(state->inode);
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struct nfs4_closedata *calldata;
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@ -1333,8 +1333,11 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state)
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task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
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if (IS_ERR(task))
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return PTR_ERR(task);
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status = 0;
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if (wait)
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status = rpc_wait_for_completion_task(task);
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rpc_put_task(task);
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return 0;
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return status;
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out_free_calldata:
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kfree(calldata);
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out:
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@ -1365,13 +1368,14 @@ static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct
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}
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ret = PTR_ERR(filp);
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out_close:
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nfs4_close_state(path, state, nd->intent.open.flags);
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nfs4_close_sync(path, state, nd->intent.open.flags);
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return ret;
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}
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struct dentry *
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nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
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{
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struct dentry *parent;
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struct path path = {
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.mnt = nd->mnt,
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.dentry = dentry,
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@ -1394,6 +1398,9 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
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cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
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if (IS_ERR(cred))
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return (struct dentry *)cred;
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parent = dentry->d_parent;
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/* Protect against concurrent sillydeletes */
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nfs_block_sillyrename(parent);
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state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
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put_rpccred(cred);
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if (IS_ERR(state)) {
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@ -1401,12 +1408,14 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
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d_add(dentry, NULL);
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nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
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}
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nfs_unblock_sillyrename(parent);
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return (struct dentry *)state;
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}
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res = d_add_unique(dentry, igrab(state->inode));
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if (res != NULL)
|
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path.dentry = res;
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nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
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nfs_unblock_sillyrename(parent);
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nfs4_intent_set_file(nd, &path, state);
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return res;
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}
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@ -1444,7 +1453,7 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st
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nfs4_intent_set_file(nd, &path, state);
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return 1;
|
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}
|
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nfs4_close_state(&path, state, openflags);
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nfs4_close_sync(&path, state, openflags);
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||||
out_drop:
|
||||
d_drop(dentry);
|
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return 0;
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|
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@ -1898,7 +1907,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
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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;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -425,7 +425,7 @@ void nfs4_put_open_state(struct nfs4_state *state)
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|||
/*
|
||||
* 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
116
fs/nfs/unlink.c
|
|
@ -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);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
|||
|
|
@ -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)
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
Loading…
Reference in New Issue