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authorChristian Brauner <brauner@kernel.org>2022-10-17 18:06:34 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2022-10-18 11:09:43 +0300
commit11c2a8700cdcabf9b639b7204a1e38e2a0b6798e (patch)
treef98a38095132d6d55b9f718ad07d3a3824998bdd /fs/internal.h
parent9abf2313adc1ca1b6180c508c25f22f9395cc780 (diff)
downloadlinux-11c2a8700cdcabf9b639b7204a1e38e2a0b6798e.tar.xz
attr: add in_group_or_capable()
In setattr_{copy,prepare}() we need to perform the same permission checks to determine whether we need to drop the setgid bit or not. Instead of open-coding it twice add a simple helper the encapsulates the logic. We will reuse this helpers to make dropping the setgid bit during write operations more consistent in a follow up patch. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'fs/internal.h')
-rw-r--r--fs/internal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/internal.h b/fs/internal.h
index 6f0386b34fae..1de39bbc9ddd 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -151,6 +151,8 @@ extern int vfs_open(const struct path *, struct file *);
*/
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
extern int dentry_needs_remove_privs(struct dentry *dentry);
+bool in_group_or_capable(struct user_namespace *mnt_userns,
+ const struct inode *inode, vfsgid_t vfsgid);
/*
* fs-writeback.c