summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChristian Brauner <brauner@kernel.org>2024-02-08 21:10:45 +0300
committerChristian Brauner <brauner@kernel.org>2024-02-25 14:05:08 +0300
commitbac0a9e56e1fd14b227ab57142eca6f7bc6e6115 (patch)
tree685eb551d85a634533ec89b3eb99f505b718717e
parent0873add0e0cd74fe3c7dae3fcfd610cbc1d08bd1 (diff)
downloadlinux-bac0a9e56e1fd14b227ab57142eca6f7bc6e6115.tar.xz
file: add alloc_file_pseudo_noaccount()
When we open block devices as files we want to make sure to not charge them against the open file limit of the caller as that can cause spurious failures. Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-1-adbd023e19cc@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org>
-rw-r--r--fs/file_table.c24
-rw-r--r--include/linux/file.h2
2 files changed, 26 insertions, 0 deletions
diff --git a/fs/file_table.c b/fs/file_table.c
index a94adac3d907..6925522faa0a 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -357,6 +357,30 @@ struct file *alloc_file_pseudo(struct inode *inode, struct vfsmount *mnt,
}
EXPORT_SYMBOL(alloc_file_pseudo);
+struct file *alloc_file_pseudo_noaccount(struct inode *inode,
+ struct vfsmount *mnt, const char *name,
+ int flags,
+ const struct file_operations *fops)
+{
+ int ret;
+ struct path path;
+ struct file *file;
+
+ ret = alloc_path_pseudo(name, inode, mnt, &path);
+ if (ret)
+ return ERR_PTR(ret);
+
+ file = alloc_empty_file_noaccount(flags, current_cred());
+ if (IS_ERR(file)) {
+ ihold(inode);
+ path_put(&path);
+ return file;
+ }
+ file_init_path(file, &path, fops);
+ return file;
+}
+EXPORT_SYMBOL_GPL(alloc_file_pseudo_noaccount);
+
struct file *alloc_file_clone(struct file *base, int flags,
const struct file_operations *fops)
{
diff --git a/include/linux/file.h b/include/linux/file.h
index 6834a29338c4..169692cb1906 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -24,6 +24,8 @@ struct inode;
struct path;
extern struct file *alloc_file_pseudo(struct inode *, struct vfsmount *,
const char *, int flags, const struct file_operations *);
+extern struct file *alloc_file_pseudo_noaccount(struct inode *, struct vfsmount *,
+ const char *, int flags, const struct file_operations *);
extern struct file *alloc_file_clone(struct file *, int flags,
const struct file_operations *);