diff options
| -rw-r--r-- | fs/cifs/cifsfs.c | 17 | ||||
| -rw-r--r-- | fs/cifs/file.c | 10 |
2 files changed, 25 insertions, 2 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 582d66ca6da5..136af8a08f45 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -513,6 +513,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf, return written; } +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 == 2) { + int retval = cifs_revalidate(file->f_dentry); + if (retval < 0) + return (loff_t)retval; + } + return remote_llseek(file, offset, origin); +} + static struct file_system_type cifs_fs_type = { .owner = THIS_MODULE, .name = "cifs", @@ -586,6 +597,7 @@ struct file_operations cifs_file_ops = { .flush = cifs_flush, .mmap = cifs_file_mmap, .sendfile = generic_file_sendfile, + .llseek = cifs_llseek, #ifdef CONFIG_CIFS_POSIX .ioctl = cifs_ioctl, #endif /* CONFIG_CIFS_POSIX */ @@ -609,7 +621,7 @@ struct file_operations cifs_file_direct_ops = { #ifdef CONFIG_CIFS_POSIX .ioctl = cifs_ioctl, #endif /* CONFIG_CIFS_POSIX */ - + .llseek = cifs_llseek, #ifdef CONFIG_CIFS_EXPERIMENTAL .dir_notify = cifs_dir_notify, #endif /* CONFIG_CIFS_EXPERIMENTAL */ @@ -627,6 +639,7 @@ struct file_operations cifs_file_nobrl_ops = { .flush = cifs_flush, .mmap = cifs_file_mmap, .sendfile = generic_file_sendfile, + .llseek = cifs_llseek, #ifdef CONFIG_CIFS_POSIX .ioctl = cifs_ioctl, #endif /* CONFIG_CIFS_POSIX */ @@ -649,7 +662,7 @@ struct file_operations cifs_file_direct_nobrl_ops = { #ifdef CONFIG_CIFS_POSIX .ioctl = cifs_ioctl, #endif /* CONFIG_CIFS_POSIX */ - + .llseek = cifs_llseek, #ifdef CONFIG_CIFS_EXPERIMENTAL .dir_notify = cifs_dir_notify, #endif /* CONFIG_CIFS_EXPERIMENTAL */ diff --git a/fs/cifs/file.c b/fs/cifs/file.c index c249b628fd1c..670ec1e84da0 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1835,10 +1835,20 @@ int is_size_safe_to_change(struct cifsInodeInfo *cifsInode) open_file = find_writable_file(cifsInode); if(open_file) { + struct cifs_sb_info *cifs_sb; + /* there is not actually a write pending so let this handle go free and allow it to be closable if needed */ atomic_dec(&open_file->wrtPending); + + cifs_sb = CIFS_SB(cifsInode->vfs_inode.i_sb); + if ( cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO ) { + /* since no page cache to corrupt on directio + we can change size safely */ + return 1; + } + return 0; } else return 1; |