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| author | Pavel Shilovsky <piastryyy@gmail.com> | 2010-11-21 20:36:12 +0100 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2011-01-20 22:42:17 +0100 |
| commit | 4f8ba8a0c095933dd54a2c281750c8a85b329b26 (patch) | |
| tree | 511da3f47059fc575a5af4128b76997f67f3a1fe | |
| parent | cifs: mangle existing header for SMB_COM_NT_CANCEL (diff) | |
| download | linux-4f8ba8a0c095933dd54a2c281750c8a85b329b26.tar.xz linux-4f8ba8a0c095933dd54a2c281750c8a85b329b26.zip | |
CIFS: Make cifsFileInfo_put work with strict cache mode
On strict cache mode when we close the last file handle of the inode we
should set invalid_mapping flag on this inode to prevent data coherency
problem when we open it again but it has been modified on the server.
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
| -rw-r--r-- | fs/cifs/cifs_fs_sb.h | 1 | ||||
| -rw-r--r-- | fs/cifs/file.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h index 7852cd677051..ac51cd2d33ae 100644 --- a/fs/cifs/cifs_fs_sb.h +++ b/fs/cifs/cifs_fs_sb.h @@ -40,6 +40,7 @@ #define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */ #define CIFS_MOUNT_MF_SYMLINKS 0x10000 /* Minshall+French Symlinks enabled */ #define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */ +#define CIFS_MOUNT_STRICT_IO 0x40000 /* strict cache mode */ struct cifs_sb_info { struct rb_root tlink_tree; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index bd2a028af833..1b26c2717599 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -287,6 +287,7 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) struct inode *inode = cifs_file->dentry->d_inode; struct cifsTconInfo *tcon = tlink_tcon(cifs_file->tlink); struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifsLockInfo *li, *tmp; spin_lock(&cifs_file_list_lock); @@ -302,6 +303,13 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) if (list_empty(&cifsi->openFileList)) { cFYI(1, "closing last open instance for inode %p", cifs_file->dentry->d_inode); + + /* in strict cache mode we need invalidate mapping on the last + close because it may cause a error when we open this file + again and get at least level II oplock */ + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) + CIFS_I(inode)->invalid_mapping = true; + cifs_set_oplock_level(cifsi, 0); } spin_unlock(&cifs_file_list_lock); |