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| author | Christian Brauner <brauner@kernel.org> | 2024-08-06 18:02:29 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-08-30 08:22:12 +0200 |
| commit | 32a0a965b8a5b7b505babae2ee10c513ede376d8 (patch) | |
| tree | 71e667e1eded96058def71615c50024504d887ad /fs | |
| parent | proc: proc_readfdinfo() -> proc_fdinfo_iterate() (diff) | |
| download | linux-32a0a965b8a5b7b505babae2ee10c513ede376d8.tar.xz linux-32a0a965b8a5b7b505babae2ee10c513ede376d8.zip | |
proc: add proc_splice_unmountable()
Add a tiny procfs helper to splice a dentry that cannot be mounted upon.
Link: https://lore.kernel.org/r/20240806-work-procfs-v1-3-fb04e1d09f0c@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/proc/internal.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/proc/internal.h b/fs/proc/internal.h index a8a8576d8592..9e3f25e4c188 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -349,3 +349,16 @@ static inline void pde_force_lookup(struct proc_dir_entry *pde) /* /proc/net/ entries can be changed under us by setns(CLONE_NEWNET) */ pde->proc_dops = &proc_net_dentry_ops; } + +/* + * Add a new procfs dentry that can't serve as a mountpoint. That should + * encompass anything that is ephemeral and can just disappear while the + * process is still around. + */ +static inline struct dentry *proc_splice_unmountable(struct inode *inode, + struct dentry *dentry, const struct dentry_operations *d_ops) +{ + d_set_d_op(dentry, d_ops); + dont_mount(dentry); + return d_splice_alias(inode, dentry); +} |