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authorSteve French <sfrench@us.ibm.com>2007-02-01 04:27:59 +0000
committerSteve French <sfrench@us.ibm.com>2007-02-01 04:27:59 +0000
commit030e9d8147491a9d2fe1b67882a3720fcf8b95f7 (patch)
tree97a68614bd5711e14451964c18660dc4e35109fe /fs
parent190ff5b3a168b666925897558998b5d97fec8731 (diff)
downloadop-kernel-dev-030e9d8147491a9d2fe1b67882a3720fcf8b95f7.zip
op-kernel-dev-030e9d8147491a9d2fe1b67882a3720fcf8b95f7.tar.gz
[CIFS] lseek polling returned stale EOF
Fixes Samba bug 4362 Discovered by Jeremy Allison Clipper database polls on EOF via lseek and can get stale EOF when file is open on different client Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifsfs.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 10c9029..93ef099 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -511,7 +511,15 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
{
/* origin == SEEK_END => we must revalidate the cached file length */
if (origin == SEEK_END) {
- int retval = cifs_revalidate(file->f_path.dentry);
+ int retval;
+
+ /* some applications poll for the file length in this strange
+ way so we must seek to end on non-oplocked files by
+ setting the revalidate time to zero */
+ if(file->f_path.dentry->d_inode)
+ CIFS_I(file->f_path.dentry->d_inode)->time = 0;
+
+ retval = cifs_revalidate(file->f_path.dentry);
if (retval < 0)
return (loff_t)retval;
}
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