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authorSteve French <sfrench@us.ibm.com>2007-02-08 21:14:13 +0300
committerSteve French <sfrench@us.ibm.com>2007-02-08 21:14:13 +0300
commit7ba526316ae122e60c0c7a40793491f71b9ec590 (patch)
tree5cac6a04506e79823245cd2996572b48b468e736 /fs/cifs
parent595dcfecf642c8b0772989ed46f15ee03c25a205 (diff)
downloadlinux-7ba526316ae122e60c0c7a40793491f71b9ec590.tar.xz
[CIFS] Allow update of EOF on remote extend of file
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifsproto.h2
-rw-r--r--fs/cifs/file.c5
-rw-r--r--fs/cifs/inode.c6
-rw-r--r--fs/cifs/readdir.c6
4 files changed, 11 insertions, 8 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index f1f8225102f0..1108f17bf550 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -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);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index e9dcf5ee29a2..07ff9351e9ee 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -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;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index c4fa91b8b62f..3f5bc83dc3d1 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -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));
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 782940be550f..c6220bd27165 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -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);
@@ -351,10 +351,10 @@ 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);
+ i_size_write(tmp_inode, end_of_file);
/* 512 bytes (2**9) is the fake blocksize that must be used */
/* for this calculation, not the real blocksize */