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authorChristian Brauner <brauner@kernel.org>2023-01-13 12:49:12 +0100
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 09:24:25 +0100
commitb74d24f7a74ffd2d42ca883d84b7422b8d545901 (patch)
treed7dbd3114e0e1c04a1c03c894c68fdbb566fce0b /fs/proc/base.c
parentc1632a0f11209338fc300c66252bcc4686e609e8 (diff)
downloadlinux-next-b74d24f7a74ffd2d42ca883d84b7422b8d545901.tar.gz
fs: port ->getattr() to pass mnt_idmap
Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 92166c33395d..aa7ebee00746 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1959,14 +1959,14 @@ static struct inode *proc_pid_make_base_inode(struct super_block *sb,
return inode;
}
-int pid_getattr(struct user_namespace *mnt_userns, const struct path *path,
+int pid_getattr(struct mnt_idmap *idmap, const struct path *path,
struct kstat *stat, u32 request_mask, unsigned int query_flags)
{
struct inode *inode = d_inode(path->dentry);
struct proc_fs_info *fs_info = proc_sb_info(inode->i_sb);
struct task_struct *task;
- generic_fillattr(&init_user_ns, inode, stat);
+ generic_fillattr(&nop_mnt_idmap, inode, stat);
stat->uid = GLOBAL_ROOT_UID;
stat->gid = GLOBAL_ROOT_GID;
@@ -3891,13 +3891,13 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
return 0;
}
-static int proc_task_getattr(struct user_namespace *mnt_userns,
+static int proc_task_getattr(struct mnt_idmap *idmap,
const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
{
struct inode *inode = d_inode(path->dentry);
struct task_struct *p = get_proc_task(inode);
- generic_fillattr(&init_user_ns, inode, stat);
+ generic_fillattr(&nop_mnt_idmap, inode, stat);
if (p) {
stat->nlink += get_nr_threads(p);