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-rw-r--r--fs/cifs/misc.c59
1 files changed, 53 insertions, 6 deletions
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 9469f1cf0b46..bb1185fff8cc 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -1,6 +1,5 @@
// SPDX-License-Identifier: LGPL-2.1
/*
- * fs/cifs/misc.c
*
* Copyright (C) International Business Machines Corp., 2002,2008
* Author(s): Steve French (sfrench@us.ibm.com)
@@ -265,7 +264,8 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
/* Uid is not converted */
buffer->Uid = treeCon->ses->Suid;
- buffer->Mid = get_next_mid(treeCon->ses->server);
+ if (treeCon->ses->server)
+ buffer->Mid = get_next_mid(treeCon->ses->server);
}
if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
buffer->Flags2 |= SMBFLG2_DFS;
@@ -591,6 +591,7 @@ void cifs_put_writer(struct cifsInodeInfo *cinode)
/**
* cifs_queue_oplock_break - queue the oplock break handler for cfile
+ * @cfile: The file to break the oplock on
*
* This function is called from the demultiplex thread when it
* receives an oplock break for @cfile.
@@ -736,7 +737,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
if (cancel_delayed_work(&cfile->deferred)) {
tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
if (tmp_list == NULL)
- continue;
+ break;
tmp_list->cfile = cfile;
list_add_tail(&tmp_list->list, &file_head);
}
@@ -767,7 +768,7 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon)
if (cancel_delayed_work(&cfile->deferred)) {
tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
if (tmp_list == NULL)
- continue;
+ break;
tmp_list->cfile = cfile;
list_add_tail(&tmp_list->list, &file_head);
}
@@ -781,6 +782,43 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon)
kfree(tmp_list);
}
}
+void
+cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
+{
+ struct cifsFileInfo *cfile;
+ struct list_head *tmp;
+ struct file_list *tmp_list, *tmp_next_list;
+ struct list_head file_head;
+ void *page;
+ const char *full_path;
+
+ INIT_LIST_HEAD(&file_head);
+ page = alloc_dentry_path();
+ spin_lock(&tcon->open_file_lock);
+ list_for_each(tmp, &tcon->openFileList) {
+ cfile = list_entry(tmp, struct cifsFileInfo, tlist);
+ full_path = build_path_from_dentry(cfile->dentry, page);
+ if (strstr(full_path, path)) {
+ if (delayed_work_pending(&cfile->deferred)) {
+ if (cancel_delayed_work(&cfile->deferred)) {
+ tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
+ if (tmp_list == NULL)
+ break;
+ tmp_list->cfile = cfile;
+ list_add_tail(&tmp_list->list, &file_head);
+ }
+ }
+ }
+ }
+ spin_unlock(&tcon->open_file_lock);
+
+ list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
+ _cifsFileInfo_put(tmp_list->cfile, true, false);
+ list_del(&tmp_list->list);
+ kfree(tmp_list);
+ }
+ free_dentry_path(page);
+}
/* parses DFS refferal V3 structure
* caller is responsible for freeing target_nodes
@@ -1029,6 +1067,9 @@ setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw)
/**
* cifs_alloc_hash - allocate hash and hash context together
+ * @name: The name of the crypto hash algo
+ * @shash: Where to put the pointer to the hash algo
+ * @sdesc: Where to put the pointer to the hash descriptor
*
* The caller has to make sure @sdesc is initialized to either NULL or
* a valid context. Both can be freed via cifs_free_hash().
@@ -1067,6 +1108,8 @@ cifs_alloc_hash(const char *name,
/**
* cifs_free_hash - free hash and hash context together
+ * @shash: Where to find the pointer to the hash algo
+ * @sdesc: Where to find the pointer to the hash descriptor
*
* Freeing a NULL hash or context is safe.
*/
@@ -1082,8 +1125,10 @@ cifs_free_hash(struct crypto_shash **shash, struct sdesc **sdesc)
/**
* rqst_page_get_length - obtain the length and offset for a page in smb_rqst
- * Input: rqst - a smb_rqst, page - a page index for rqst
- * Output: *len - the length for this page, *offset - the offset for this page
+ * @rqst: The request descriptor
+ * @page: The index of the page to query
+ * @len: Where to store the length for this page:
+ * @offset: Where to store the offset for this page
*/
void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset)
@@ -1116,6 +1161,8 @@ void extract_unc_hostname(const char *unc, const char **h, size_t *len)
/**
* copy_path_name - copy src path to dst, possibly truncating
+ * @dst: The destination buffer
+ * @src: The source name
*
* returns number of bytes written (including trailing nul)
*/