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authorSteve French <sfrench@us.ibm.com>2007-10-26 01:17:17 +0400
committerSteve French <sfrench@us.ibm.com>2007-10-26 01:17:17 +0400
commit630f3f0c45a80ab907d216191ef4a205c249fa1b (patch)
treebe1fe069ded6df343f978469160b002c5ae67169 /fs/cifs/file.c
parent44093ca2fef3c52dc7d186116862d74f9a676e0f (diff)
downloadlinux-630f3f0c45a80ab907d216191ef4a205c249fa1b.tar.xz
[CIFS] acl support part 6
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com> CC: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 1e7e4c06d9e3..68ad4ca0cfa3 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1026,6 +1026,37 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
return total_written;
}
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode)
+{
+ struct cifsFileInfo *open_file = NULL;
+
+ read_lock(&GlobalSMBSeslock);
+ /* we could simply get the first_list_entry since write-only entries
+ are always at the end of the list but since the first entry might
+ have a close pending, we go through the whole list */
+ list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
+ if (open_file->closePend)
+ continue;
+ if (open_file->pfile && ((open_file->pfile->f_flags & O_RDWR) ||
+ (open_file->pfile->f_flags & O_RDONLY))) {
+ if (!open_file->invalidHandle) {
+ /* found a good file */
+ /* lock it so it will not be closed on us */
+ atomic_inc(&open_file->wrtPending);
+ read_unlock(&GlobalSMBSeslock);
+ return open_file;
+ } /* else might as well continue, and look for
+ another, or simply have the caller reopen it
+ again rather than trying to fix this handle */
+ } else /* write only file */
+ break; /* write only files are last so must be done */
+ }
+ read_unlock(&GlobalSMBSeslock);
+ return NULL;
+}
+#endif
+
struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode)
{
struct cifsFileInfo *open_file;