diff options
| -rw-r--r-- | fs/9p/cache.h | 1 | ||||
| -rw-r--r-- | fs/binfmt_elf.c | 12 | ||||
| -rw-r--r-- | fs/buffer.c | 24 | ||||
| -rw-r--r-- | fs/cachefiles/namei.c | 2 | ||||
| -rw-r--r-- | fs/cachefiles/rdwr.c | 73 | ||||
| -rw-r--r-- | fs/debugfs/inode.c | 6 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 4 | ||||
| -rw-r--r-- | fs/fscache/netfs.c | 38 | ||||
| -rw-r--r-- | fs/fscache/page.c | 2 | ||||
| -rw-r--r-- | fs/nilfs2/file.c | 2 | ||||
| -rw-r--r-- | fs/pipe.c | 18 | ||||
| -rw-r--r-- | fs/xfs/xfs_file.c | 2 | ||||
| -rw-r--r-- | include/linux/buffer_head.h | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 |
14 files changed, 86 insertions, 102 deletions
diff --git a/fs/9p/cache.h b/fs/9p/cache.h index 2f96754..247e47e 100644 --- a/fs/9p/cache.h +++ b/fs/9p/cache.h @@ -21,6 +21,7 @@ */ #ifndef _9P_CACHE_H +#define _9P_CACHE_H #ifdef CONFIG_9P_FSCACHE #include <linux/fscache.h> #include <linux/spinlock.h> diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 5f399ea..3a93755 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -488,7 +488,7 @@ static inline int arch_elf_pt_proc(struct elfhdr *ehdr, } /** - * arch_check_elf() - check a PT_LOPROC..PT_HIPROC ELF program header + * arch_check_elf() - check an ELF executable * @ehdr: The main ELF header * @has_interp: True if the ELF has an interpreter, else false. * @state: Architecture-specific state preserved throughout the process @@ -760,16 +760,16 @@ static int load_elf_binary(struct linux_binprm *bprm) */ would_dump(bprm, interpreter); - retval = kernel_read(interpreter, 0, bprm->buf, - BINPRM_BUF_SIZE); - if (retval != BINPRM_BUF_SIZE) { + /* Get the exec headers */ + retval = kernel_read(interpreter, 0, + (void *)&loc->interp_elf_ex, + sizeof(loc->interp_elf_ex)); + if (retval != sizeof(loc->interp_elf_ex)) { if (retval >= 0) retval = -EIO; goto out_free_dentry; } - /* Get the exec headers */ - loc->interp_elf_ex = *((struct elfhdr *)bprm->buf); break; } elf_ppnt++; diff --git a/fs/buffer.c b/fs/buffer.c index 51aff02..4f4cd95 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2420,9 +2420,9 @@ EXPORT_SYMBOL(block_commit_write); * unlock the page. * * Direct callers of this function should protect against filesystem freezing - * using sb_start_write() - sb_end_write() functions. + * using sb_start_pagefault() - sb_end_pagefault() functions. */ -int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, +int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, get_block_t get_block) { struct page *page = vmf->page; @@ -2459,26 +2459,6 @@ out_unlock: unlock_page(page); return ret; } -EXPORT_SYMBOL(__block_page_mkwrite); - -int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, - get_block_t get_block) -{ - int ret; - struct super_block *sb = file_inode(vma->vm_file)->i_sb; - - sb_start_pagefault(sb); - - /* - * Update file times before taking page lock. We may end up failing the - * fault so this update may be superfluous but who really cares... - */ - file_update_time(vma->vm_file); - - ret = __block_page_mkwrite(vma, vmf, get_block); - sb_end_pagefault(sb); - return block_page_mkwrite_return(ret); -} EXPORT_SYMBOL(block_page_mkwrite); /* diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index fc1056f..c4b8934 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -655,6 +655,8 @@ lookup_again: aops = d_backing_inode(object->dentry)->i_mapping->a_ops; if (!aops->bmap) goto check_error; + if (object->dentry->d_sb->s_blocksize > PAGE_SIZE) + goto check_error; object->backer = object->dentry; } else { diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c index 3cbb0e8..7a6b02f 100644 --- a/fs/cachefiles/rdwr.c +++ b/fs/cachefiles/rdwr.c @@ -414,9 +414,6 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, ASSERT(inode->i_mapping->a_ops->readpages); /* calculate the shift required to use bmap */ - if (inode->i_sb->s_blocksize > PAGE_SIZE) - goto enobufs; - shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits; op->op.flags &= FSCACHE_OP_KEEP_FLAGS; @@ -711,9 +708,6 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, ASSERT(inode->i_mapping->a_ops->readpages); /* calculate the shift required to use bmap */ - if (inode->i_sb->s_blocksize > PAGE_SIZE) - goto all_enobufs; - shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits; pagevec_init(&pagevec, 0); @@ -905,6 +899,15 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page) cache = container_of(object->fscache.cache, struct cachefiles_cache, cache); + pos = (loff_t)page->index << PAGE_SHIFT; + + /* We mustn't write more data than we have, so we have to beware of a + * partial page at EOF. + */ + eof = object->fscache.store_limit_l; + if (pos >= eof) + goto error; + /* write the page to the backing filesystem and let it store it in its * own time */ path.mnt = cache->mnt; @@ -912,40 +915,38 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page) file = dentry_open(&path, O_RDWR | O_LARGEFILE, cache->cache_cred); if (IS_ERR(file)) { ret = PTR_ERR(file); - } else { - pos = (loff_t) page->index << PAGE_SHIFT; - - /* we mustn't write more data than we have, so we have - * to beware of a partial page at EOF */ - eof = object->fscache.store_limit_l; - len = PAGE_SIZE; - if (eof & ~PAGE_MASK) { - ASSERTCMP(pos, <, eof); - if (eof - pos < PAGE_SIZE) { - _debug("cut short %llx to %llx", - pos, eof); - len = eof - pos; - ASSERTCMP(pos + len, ==, eof); - } - } - - data = kmap(page); - ret = __kernel_write(file, data, len, &pos); - kunmap(page); - if (ret != len) - ret = -EIO; - fput(file); + goto error_2; } - if (ret < 0) { - if (ret == -EIO) - cachefiles_io_error_obj( - object, "Write page to backing file failed"); - ret = -ENOBUFS; + len = PAGE_SIZE; + if (eof & ~PAGE_MASK) { + if (eof - pos < PAGE_SIZE) { + _debug("cut short %llx to %llx", + pos, eof); + len = eof - pos; + ASSERTCMP(pos + len, ==, eof); + } } - _leave(" = %d", ret); - return ret; + data = kmap(page); + ret = __kernel_write(file, data, len, &pos); + kunmap(page); + fput(file); + if (ret != len) + goto error_eio; + + _leave(" = 0"); + return 0; + +error_eio: + ret = -EIO; +error_2: + if (ret == -EIO) + cachefiles_io_error_obj(object, + "Write page to backing file failed"); +error: + _leave(" = -ENOBUFS [%d]", ret); + return -ENOBUFS; } /* diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 5d8f35f..b7fcc0d 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -271,8 +271,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent) dput(dentry); dentry = ERR_PTR(-EEXIST); } - if (IS_ERR(dentry)) + + if (IS_ERR(dentry)) { mutex_unlock(&d_inode(parent)->i_mutex); + simple_release_fs(&debugfs_mount, &debugfs_mount_count); + } + return dentry; } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 7d1aad1..ea433a7 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5283,7 +5283,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) !ext4_should_journal_data(inode) && !ext4_nonda_switch(inode->i_sb)) { do { - ret = __block_page_mkwrite(vma, vmf, + ret = block_page_mkwrite(vma, vmf, ext4_da_get_block_prep); } while (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)); @@ -5330,7 +5330,7 @@ retry_alloc: ret = VM_FAULT_SIGBUS; goto out; } - ret = __block_page_mkwrite(vma, vmf, get_block); + ret = block_page_mkwrite(vma, vmf, get_block); if (!ret && ext4_should_journal_data(inode)) { if (ext4_walk_page_buffers(handle, page_buffers(page), 0, PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) { diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c index 6d941f5..9b28649 100644 --- a/fs/fscache/netfs.c +++ b/fs/fscache/netfs.c @@ -22,6 +22,7 @@ static LIST_HEAD(fscache_netfs_list); int __fscache_register_netfs(struct fscache_netfs *netfs) { struct fscache_netfs *ptr; + struct fscache_cookie *cookie; int ret; _enter("{%s}", netfs->name); @@ -29,29 +30,25 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) INIT_LIST_HEAD(&netfs->link); /* allocate a cookie for the primary index */ - netfs->primary_index = - kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL); + cookie = kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL); - if (!netfs->primary_index) { + if (!cookie) { _leave(" = -ENOMEM"); return -ENOMEM; } /* initialise the primary index cookie */ - atomic_set(&netfs->primary_index->usage, 1); - atomic_set(&netfs->primary_index->n_children, 0); - atomic_set(&netfs->primary_index->n_active, 1); + atomic_set(&cookie->usage, 1); + atomic_set(&cookie->n_children, 0); + atomic_set(&cookie->n_active, 1); - netfs->primary_index->def = &fscache_fsdef_netfs_def; - netfs->primary_index->parent = &fscache_fsdef_index; - netfs->primary_index->netfs_data = netfs; - netfs->primary_index->flags = 1 << FSCACHE_COOKIE_ENABLED; + cookie->def = &fscache_fsdef_netfs_def; + cookie->parent = &fscache_fsdef_index; + cookie->netfs_data = netfs; + cookie->flags = 1 << FSCACHE_COOKIE_ENABLED; - atomic_inc(&netfs->primary_index->parent->usage); - atomic_inc(&netfs->primary_index->parent->n_children); - - spin_lock_init(&netfs->primary_index->lock); - INIT_HLIST_HEAD(&netfs->primary_index->backing_objects); + spin_lock_init(&cookie->lock); + INIT_HLIST_HEAD(&cookie->backing_objects); /* check the netfs type is not already present */ down_write(&fscache_addremove_sem); @@ -62,6 +59,10 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) goto already_registered; } + atomic_inc(&cookie->parent->usage); + atomic_inc(&cookie->parent->n_children); + + netfs->primary_index = cookie; list_add(&netfs->link, &fscache_netfs_list); ret = 0; @@ -70,11 +71,8 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) already_registered: up_write(&fscache_addremove_sem); - if (ret < 0) { - netfs->primary_index->parent = NULL; - __fscache_cookie_put(netfs->primary_index); - netfs->primary_index = NULL; - } + if (ret < 0) + kmem_cache_free(fscache_cookie_jar, cookie); _leave(" = %d", ret); return ret; diff --git a/fs/fscache/page.c b/fs/fscache/page.c index 79483b3..6b35fc4 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -816,7 +816,7 @@ static void fscache_write_op(struct fscache_operation *_op) goto superseded; page = results[0]; _debug("gang %d [%lx]", n, page->index); - if (page->index > op->store_limit) { + if (page->index >= op->store_limit) { fscache_stat(&fscache_n_store_pages_over_limit); goto superseded; } diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 54575e3..088ba00 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -109,7 +109,7 @@ static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) goto out; file_update_time(vma->vm_file); - ret = __block_page_mkwrite(vma, vmf, nilfs_get_block); + ret = block_page_mkwrite(vma, vmf, nilfs_get_block); if (ret) { nilfs_transaction_abort(inode->i_sb); goto out; @@ -366,18 +366,17 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from) int offset = buf->offset + buf->len; if (ops->can_merge && offset + chars <= PAGE_SIZE) { - int error = ops->confirm(pipe, buf); - if (error) + ret = ops->confirm(pipe, buf); + if (ret) goto out; ret = copy_page_from_iter(buf->page, offset, chars, from); if (unlikely(ret < chars)) { - error = -EFAULT; + ret = -EFAULT; goto out; } do_wakeup = 1; - buf->len += chars; - ret = chars; + buf->len += ret; if (!iov_iter_count(from)) goto out; } @@ -693,17 +692,20 @@ int create_pipe_files(struct file **res, int flags) d_instantiate(path.dentry, inode); - err = -ENFILE; f = alloc_file(&path, FMODE_WRITE, &pipefifo_fops); - if (IS_ERR(f)) + if (IS_ERR(f)) { + err = PTR_ERR(f); goto err_dentry; + } f->f_flags = O_WRONLY | (flags & (O_NONBLOCK | O_DIRECT)); f->private_data = inode->i_pipe; res[0] = alloc_file(&path, FMODE_READ, &pipefifo_fops); - if (IS_ERR(res[0])) + if (IS_ERR(res[0])) { + err = PTR_ERR(res[0]); goto err_file; + } path_get(&path); res[0]->private_data = inode->i_pipe; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index e78feb4..f80e90f 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1506,7 +1506,7 @@ xfs_filemap_page_mkwrite( ret = __dax_mkwrite(vma, vmf, xfs_get_blocks_direct, xfs_end_io_dax_write); } else { - ret = __block_page_mkwrite(vma, vmf, xfs_get_blocks); + ret = block_page_mkwrite(vma, vmf, xfs_get_blocks); ret = block_page_mkwrite_return(ret); } diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index e6797de..89d9aa9e 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -227,8 +227,6 @@ int cont_write_begin(struct file *, struct address_space *, loff_t, get_block_t *, loff_t *); int generic_cont_expand_simple(struct inode *inode, loff_t size); int block_commit_write(struct page *page, unsigned from, unsigned to); -int __block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, - get_block_t get_block); int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, get_block_t get_block); /* Convert errno to return value from ->page_mkwrite() call */ diff --git a/include/linux/fs.h b/include/linux/fs.h index 6230eb2..3aa5142 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1665,8 +1665,6 @@ struct inode_operations { umode_t create_mode, int *opened); int (*tmpfile) (struct inode *, struct dentry *, umode_t); int (*set_acl)(struct inode *, struct posix_acl *, int); - - /* WARNING: probably going away soon, do not use! */ } ____cacheline_aligned; ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, |
