linuxmsm/laptops-kernel
0
0
Fork 0
mirror of https://github.com/linux-msm/laptops-kernel.git synced 2026-08-13 14:19:53 -07:00
Code Issues Packages Projects Releases Wiki Activity

vfs: introduce d_mark_tmpfile_name()

Browse Source 
CIFS requires O_TMPFILE dentries to have names of newly created
delete-on-close files in the server so it can build full pathnames
from the root of the share when performing operations on them.

Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara
2026-04-10 11:25:34 -05:00
committed by Steve French
parent 158f4ff1b8
commit 30a59dddd6
2 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/dcache.c
+19
View File
@@ -3196,6 +3196,25 @@ void d_mark_tmpfile(struct file *file, struct inode *inode)
}
EXPORT_SYMBOL(d_mark_tmpfile);
void d_mark_tmpfile_name(struct file *file, const struct qstr *name)
{
struct dentry *dentry = file->f_path.dentry;
char *dname = dentry->d_shortname.string;
BUG_ON(dname_external(dentry));
BUG_ON(d_really_is_positive(dentry));
BUG_ON(!d_unlinked(dentry));
BUG_ON(name->len > DNAME_INLINE_LEN - 1);
spin_lock(&dentry->d_parent->d_lock);
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
dentry->__d_name.len = name->len;
memcpy(dname, name->name, name->len);
dname[name->len] = '\0';
spin_unlock(&dentry->d_lock);
spin_unlock(&dentry->d_parent->d_lock);
}
EXPORT_SYMBOL(d_mark_tmpfile_name);
void d_tmpfile(struct file *file, struct inode *inode)
{
struct dentry *dentry = file->f_path.dentry;
include/linux/dcache.h
+1
View File
@@ -264,6 +264,7 @@ extern void d_invalidate(struct dentry *);
extern struct dentry * d_make_root(struct inode *);
extern void d_mark_tmpfile(struct file *, struct inode *);
void d_mark_tmpfile_name(struct file *file, const struct qstr *name);
extern void d_tmpfile(struct file *, struct inode *);
extern struct dentry *d_find_alias(struct inode *);