rpms/open-vm-tools-kmod/devel open-vm-tools-130226-vmhgfs.patch, NONE, 1.1

Author: denis Update of /cvs/free/rpms/open-vm-tools-kmod/devel In directory se02.es.rpmfusion.net:/tmp/cvs-serv535 Added Files: open-vm-tools-130226-vmhgfs.patch Log Message: Update to upstream 130226. Added new kernel module pvscsi. Added patch for vmhgfs compile open-vm-tools-130226-vmhgfs.patch: --- NEW FILE open-vm-tools-130226-vmhgfs.patch --- --- modules/linux/vmhgfs/page.c +++ modules/linux/vmhgfs/page.c @@ -48,6 +48,15 @@ struct page *page, unsigned pageFrom, unsigned pageTo); +static void HgfsDoWriteBegin(struct page *page, + unsigned pageFrom, + unsigned pageTo); +static int HgfsDoWriteEnd(struct file *file, + struct page *page, + unsigned pageFrom, + unsigned pageTo, + loff_t writeTo, + unsigned copied); /* HGFS address space operations. */ static int HgfsReadpage(struct file *file, @@ -58,6 +67,31 @@ #else static int HgfsWritepage(struct page *page); #endif + +/* + * Write aop interface has changed in 2.6.28. Specifically, + * the page locking semantics and requirement to handle + * short writes. We already handle short writes, so no major + * changes needed. write_begin is expected to return a locked + * page and write_end is expected to unlock the page and drop + * the reference before returning. + */ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28) +static int HgfsWriteBegin(struct file *file, + struct address_space *mapping, + loff_t pos, + unsigned len, + unsigned flags, + struct page **page, + void **clientData); +static int HgfsWriteEnd(struct file *file, + struct address_space *mapping, + loff_t pos, + unsigned len, + unsigned copied, + struct page *page, + void *clientData); +#else static int HgfsPrepareWrite(struct file *file, struct page *page, unsigned pageFrom, @@ -66,13 +100,19 @@ struct page *page, unsigned pageFrom, unsigned pageTo); +#endif /* HGFS address space operations structure. */ struct address_space_operations HgfsAddressSpaceOperations = { .readpage = HgfsReadpage, .writepage = HgfsWritepage, +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28) + .write_begin = HgfsWriteBegin, + .write_end = HgfsWriteEnd, +#else .prepare_write = HgfsPrepareWrite, .commit_write = HgfsCommitWrite, +#endif #ifdef HGFS_ENABLE_WRITEBACK .set_page_dirty = __set_page_dirty_nobuffers, #endif @@ -684,14 +724,14 @@ /* *----------------------------------------------------------------------------- * - * HgfsPrepareWrite -- + * HgfsDoWriteBegin -- * - * Called by the generic write path to set up a write request for a page. - * We're expected to do any pre-allocation and housekeeping prior to - * receiving the write. + * Helper function for HgfsWriteBegin / HgfsPrepareWrite. + * + * Initialize the page if the file is to be appended. * * Results: - * Always zero. + * None. * * Side effects: * None. @@ -699,12 +739,12 @@ *----------------------------------------------------------------------------- */ -static int -HgfsPrepareWrite(struct file *file, // IN: Ignored - struct page *page, // IN: Page to prepare - unsigned pageFrom, // IN: Beginning page offset - unsigned pageTo) // IN: Ending page offset +static void +HgfsDoWriteBegin(struct page *page, // IN: Page to be written + unsigned pageFrom, // IN: Starting page offset + unsigned pageTo) // IN: Ending page offset { + ASSERT(page); #ifdef HGFS_ENABLE_WRITEBACK loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT; loff_t currentFileSize = compat_i_size_read(page->mapping->host); @@ -728,6 +768,35 @@ flush_dcache_page(page); } #endif +} + + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28) +/* + *----------------------------------------------------------------------------- + * + * HgfsPrepareWrite -- + * + * Called by the generic write path to set up a write request for a page. + * We're expected to do any pre-allocation and housekeeping prior to + * receiving the write. + * + * Results: + * Always zero. + * + * Side effects: + * None. + * + *----------------------------------------------------------------------------- + */ + +static int +HgfsPrepareWrite(struct file *file, // IN: Ignored + struct page *page, // IN: Page to prepare + unsigned pageFrom, // IN: Beginning page offset + unsigned pageTo) // IN: Ending page offset +{ + HgfsDoWriteBegin(page, pageFrom, pageTo); /* * Prior to 2.4.10, our caller expected to call page_address(page) between @@ -744,48 +813,94 @@ return 0; } +#else + /* *----------------------------------------------------------------------------- * - * HgfsCommitWrite -- + * HgfsWriteBegin -- + * + * Called by the generic write path to set up a write request for a page. + * We're expected to do any pre-allocation and housekeeping prior to + * receiving the write. * - * This function is the more common write path for HGFS, called from - * generic_file_buffered_write. It is much simpler for us than - * HgfsWritepage above: the caller has obtained a reference to the page - * and will unlock it when we're done. And we don't need to worry about - * properly marking the writeback bit, either. See mm/filemap.c in the - * kernel for details about how we are called. + * This function is expected to return a locked page. * * Results: - * Zero on succes, non-zero on error. + * Zero on success, non-zero error otherwise. * * Side effects: - * None. + * None. + * + *----------------------------------------------------------------------------- + */ + +static int +HgfsWriteBegin(struct file *file, // IN: File to be written + struct address_space *mapping, // IN: Mapping + loff_t pos, // IN: File position + unsigned len, // IN: Bytes to be written + unsigned flags, // IN: Write flags + struct page **pagePtr, // OUT: Locked page + void **clientData) // OUT: Opaque to pass to write_end, unused +{ + pgoff_t index = pos >> PAGE_CACHE_SHIFT; + unsigned pageFrom = pos & (PAGE_CACHE_SHIFT - 1); + unsigned pageTo = pos + len; + struct page *page; + + page = __grab_cache_page(mapping, index); + if (page == NULL) { + return -ENOMEM; + } + *pagePtr = page; + + HgfsDoWriteBegin(page, pageFrom, pageTo); + return 0; +} +#endif + + +/* + *----------------------------------------------------------------------------- + * + * HgfsDoWriteEnd -- + * + * Helper function for HgfsWriteEnd. + * + * This function updates the inode->i_size, conditionally marks the page + * updated and carries out the actual write in case of partial page writes. + * + * Results: + * Zero on succes, non-zero on error. + * + * Side effects: + * None. * *----------------------------------------------------------------------------- */ static int -HgfsCommitWrite(struct file *file, // IN: File we're writing to - struct page *page, // IN: Page we're writing from - unsigned pageFrom, // IN: Beginning page offset - unsigned pageTo) // IN: Ending page offset +HgfsDoWriteEnd(struct file *file, // IN: File we're writing to + struct page *page, // IN: Page we're writing from + unsigned pageFrom, // IN: Starting page offset + unsigned pageTo, // IN: Ending page offset + loff_t writeTo, // IN: File position to write to + unsigned copied) // IN: Number of bytes copied to the page { HgfsHandle handle; struct inode *inode; loff_t currentFileSize; loff_t offset; - loff_t writeTo; ASSERT(file); ASSERT(page); inode = page->mapping->host; currentFileSize = compat_i_size_read(inode); offset = (loff_t)page->index << PAGE_CACHE_SHIFT; - writeTo = offset + pageTo; - /* See coment in HgfsPrepareWrite. */ + /* See comment in HgfsPrepareWrite. */ #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 10) kunmap(page); #endif @@ -795,14 +910,14 @@ } /* We wrote a complete page, so it is up to date. */ - if ((pageTo - pageFrom) == PAGE_CACHE_SIZE) { + if (copied == PAGE_CACHE_SIZE) { SetPageUptodate(page); } #ifdef HGFS_ENABLE_WRITEBACK /* * Check if this is a partial write to a new page, which was - * initialized in HgfsPrepareWrite. + * initialized in HgfsDoWriteBegin. */ if ((offset >= currentFileSize) || ((pageFrom == 0) && (writeTo >= currentFileSize))) { @@ -821,13 +936,109 @@ /* * We've recieved a partial write to page that is not uptodate, so * do the write now while the page is still locked. Another - * alternative would be to read the page in HgfsPrepareWrite, which + * alternative would be to read the page in HgfsDoWriteBegin, which * would make it uptodate (ie a complete cached page). */ handle = FILE_GET_FI_P(file)->handle; - LOG(6, (KERN_DEBUG "VMware hgfs: HgfsCommitWrite: writing to handle %u\n", + LOG(6, (KERN_DEBUG "VMware hgfs: %s: writing to handle %u\n", __FUNCTION__, handle)); return HgfsDoWritepage(handle, page, pageFrom, pageTo); } +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28) +/* + *----------------------------------------------------------------------------- + * + * HgfsCommitWrite -- + * + * This function is the more common write path for HGFS, called from + * generic_file_buffered_write. It is much simpler for us than + * HgfsWritepage above: the caller has obtained a reference to the page + * and will unlock it when we're done. And we don't need to worry about + * properly marking the writeback bit, either. See mm/filemap.c in the + * kernel for details about how we are called. + * + * Results: + * Zero on succes, non-zero on error. + * + * Side effects: + * None. + * + *----------------------------------------------------------------------------- + */ + +static int +HgfsCommitWrite(struct file *file, // IN: File to write + struct page *page, // IN: Page to write from + unsigned pageFrom, // IN: Starting page offset + unsigned pageTo) // IN: Ending page offset +{ + loff_t offset; + loff_t writeTo; + unsigned copied; + + ASSERT(page); + ASSERT(file); + + offset = (loff_t)page->index << PAGE_CACHE_SHIFT; + writeTo = offset + pageTo; + copied = pageTo - pageFrom; + + return HgfsDoWriteEnd(file, page, pageFrom, pageTo, writeTo, copied); +} + +#else + + +/* + *----------------------------------------------------------------------------- + * + * HgfsWriteEnd -- + * + * This function is the more common write path for HGFS, called from + * generic_file_buffered_write. It is much simpler for us than + * HgfsWritepage above: write_begin has obtained a reference to the page + * and we will unlock it when we're done. And we don't need to worry about + * properly marking the writeback bit, either. See mm/filemap.c in the + * kernel for details about how we are called. + * + * This function should unlock the page and reduce the refcount. + * + * Results: + * Number of bytes written or negative error + * + * Side effects: + * Unlocks the page and drops the reference. + * + *----------------------------------------------------------------------------- + */ + +static int +HgfsWriteEnd(struct file *file, // IN: File to write + struct address_space *mapping, // IN: Mapping + loff_t pos, // IN: File position + unsigned len, // IN: len passed from write_begin + unsigned copied, // IN: Number of actually copied bytes + struct page *page, // IN: Page to write from + void *clientData) // IN: From write_begin, unused. +{ + unsigned pageFrom = pos & (PAGE_CACHE_SIZE - 1); + unsigned pageTo = pageFrom + copied; + loff_t writeTo = pos + copied; + int ret; + + ASSERT(file); + ASSERT(mapping); + ASSERT(page); + + ret = HgfsDoWriteEnd(file, page, pageFrom, pageTo, writeTo, copied); + if (ret == 0) { + ret = copied; + } + + compat_unlock_page(page); + page_cache_release(page); + return ret; +} +#endif