[CIFS] Allow update of EOF on remote extend of file (7ba52631) · Commits · e / devices / android_kernel_xiaomi_markw

fs/cifs/cifsproto.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -57,7 +57,7 @@ extern int SendReceiveBlockingLock(const unsigned int /* xid */ ,
		int * /* bytes returned */);
		extern int checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length);
		extern int is_valid_oplock_break(struct smb_hdr smb, struct TCP_Server_Info );
		extern int is_size_safe_to_change(struct cifsInodeInfo *);
		extern int is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
		extern struct cifsFileInfo find_writable_file(struct cifsInodeInfo );
		extern unsigned int smbCalcSize(struct smb_hdr *ptr);
		extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);

+4 −1

Original line number	Diff line number	Diff line
		@@ -1954,7 +1954,7 @@ static int cifs_readpage(struct file file, struct page page)
		refreshing the inode only on increases in the file size
		but this is tricky to do without racing with writebehind
		page caching in the current Linux kernel design */
		int is_size_safe_to_change(struct cifsInodeInfo *cifsInode)
		int is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file)
		{
		struct cifsFileInfo *open_file = NULL;

		@@ -1976,6 +1976,9 @@ int is_size_safe_to_change(struct cifsInodeInfo *cifsInode)
		return 1;
		}

		if(i_size_read(&cifsInode->vfs_inode) < end_of_file)
		return 1;

		return 0;
		} else
		return 1;

+3 −3

Original line number	Diff line number	Diff line
		@@ -140,7 +140,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
		inode->i_gid = le64_to_cpu(findData.Gid);
		inode->i_nlink = le64_to_cpu(findData.Nlinks);

		if (is_size_safe_to_change(cifsInfo)) {
		if (is_size_safe_to_change(cifsInfo, end_of_file)) {
		/* can not safely change the file size here if the
		client is writing to it due to potential races */

		@@ -491,8 +491,8 @@ int cifs_get_inode_info(struct inode **pinode,
		/* BB add code here -
		validate if device or weird share or device type? */
		}
		if (is_size_safe_to_change(cifsInfo)) {
		/* can not safely change the file size here if the
		if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
		/* can not safely shrink the file size here if the
		client is writing to it due to potential races */
		i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));

+3 −3

Original line number	Diff line number	Diff line
		@@ -222,7 +222,7 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
		atomic_set(&cifsInfo->inUse, 1);
		}

		if (is_size_safe_to_change(cifsInfo)) {
		if (is_size_safe_to_change(cifsInfo, end_of_file)) {
		/* can not safely change the file size here if the
		client is writing to it due to potential races */
		i_size_write(tmp_inode, end_of_file);
		@@ -351,7 +351,7 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
		tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
		tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);

		if (is_size_safe_to_change(cifsInfo)) {
		if (is_size_safe_to_change(cifsInfo, end_of_file)) {
		/* can not safely change the file size here if the
		client is writing to it due to potential races */
		i_size_write(tmp_inode, end_of_file);