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-rw-r--r--fs/cifs/file.c80
1 files changed, 71 insertions, 9 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 97090693d182..4b95700c507c 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1693,9 +1693,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock)
bool posix_lck = false;
struct cifs_sb_info *cifs_sb;
struct cifs_tcon *tcon;
- struct cifsInodeInfo *cinode;
struct cifsFileInfo *cfile;
- __u16 netfid;
__u32 type;
rc = -EACCES;
@@ -1711,8 +1709,6 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock)
cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag,
tcon->ses->server);
cifs_sb = CIFS_FILE_SB(file);
- netfid = cfile->fid.netfid;
- cinode = CIFS_I(file_inode(file));
if (cap_unix(tcon->ses) &&
(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
@@ -1764,7 +1760,6 @@ cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data,
int rc = 0;
unsigned int bytes_written = 0;
unsigned int total_written;
- struct cifs_sb_info *cifs_sb;
struct cifs_tcon *tcon;
struct TCP_Server_Info *server;
unsigned int xid;
@@ -1772,8 +1767,6 @@ cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data,
struct cifsInodeInfo *cifsi = CIFS_I(d_inode(dentry));
struct cifs_io_parms io_parms;
- cifs_sb = CIFS_SB(dentry->d_sb);
-
cifs_dbg(FYI, "write %zd bytes to offset %lld of %pd\n",
write_size, *offset, dentry);
@@ -1980,6 +1973,77 @@ find_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only)
return cfile;
}
+int
+cifs_get_writable_path(struct cifs_tcon *tcon, const char *name,
+ struct cifsFileInfo **ret_file)
+{
+ struct list_head *tmp;
+ struct cifsFileInfo *cfile;
+ struct cifsInodeInfo *cinode;
+ char *full_path;
+
+ *ret_file = NULL;
+
+ 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);
+ if (full_path == NULL) {
+ spin_unlock(&tcon->open_file_lock);
+ return -ENOMEM;
+ }
+ if (strcmp(full_path, name)) {
+ kfree(full_path);
+ continue;
+ }
+
+ kfree(full_path);
+ cinode = CIFS_I(d_inode(cfile->dentry));
+ spin_unlock(&tcon->open_file_lock);
+ return cifs_get_writable_file(cinode, 0, ret_file);
+ }
+
+ spin_unlock(&tcon->open_file_lock);
+ return -ENOENT;
+}
+
+int
+cifs_get_readable_path(struct cifs_tcon *tcon, const char *name,
+ struct cifsFileInfo **ret_file)
+{
+ struct list_head *tmp;
+ struct cifsFileInfo *cfile;
+ struct cifsInodeInfo *cinode;
+ char *full_path;
+
+ *ret_file = NULL;
+
+ 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);
+ if (full_path == NULL) {
+ spin_unlock(&tcon->open_file_lock);
+ return -ENOMEM;
+ }
+ if (strcmp(full_path, name)) {
+ kfree(full_path);
+ continue;
+ }
+
+ kfree(full_path);
+ cinode = CIFS_I(d_inode(cfile->dentry));
+ spin_unlock(&tcon->open_file_lock);
+ *ret_file = find_readable_file(cinode, 0);
+ return *ret_file ? 0 : -ENOENT;
+ }
+
+ spin_unlock(&tcon->open_file_lock);
+ return -ENOENT;
+}
+
static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
{
struct address_space *mapping = page->mapping;
@@ -3577,10 +3641,8 @@ collect_uncached_read_data(struct cifs_aio_ctx *ctx)
struct cifs_readdata *rdata, *tmp;
struct iov_iter *to = &ctx->iter;
struct cifs_sb_info *cifs_sb;
- struct cifs_tcon *tcon;
int rc;
- tcon = tlink_tcon(ctx->cfile->tlink);
cifs_sb = CIFS_SB(ctx->cfile->dentry->d_sb);
mutex_lock(&ctx->aio_mutex);