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authorChristian Brauner <christian.brauner@ubuntu.com>2021-12-03 12:17:06 +0100
committerChristian Brauner <christian.brauner@ubuntu.com>2021-12-05 10:28:57 +0100
commita1ec9040a2a9122605ac26e5725c6de019184419 (patch)
tree0e5a9a613d1dd7168651abedee6cb98eb50b6d79 /include/linux/fs.h
parent209188ce75d0d357c292f6bb81d712acdd4e7db7 (diff)
fs: add i_user_ns() helper
Since we'll be passing the filesystem's idmapping in even more places in the following patches and we do already dereference struct inode to get to the filesystem's idmapping multiple times add a tiny helper. Link: https://lore.kernel.org/r/20211123114227.3124056-10-brauner@kernel.org (v1) Link: https://lore.kernel.org/r/20211130121032.3753852-10-brauner@kernel.org (v2) Link: https://lore.kernel.org/r/20211203111707.3901969-10-brauner@kernel.org Cc: Seth Forshee <sforshee@digitalocean.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> CC: linux-fsdevel@vger.kernel.org Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Seth Forshee <sforshee@digitalocean.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h13
1 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e1f28f757f1b..3d6d514943ab 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1600,6 +1600,11 @@ struct super_block {
struct list_head s_inodes_wb; /* writeback inodes */
} __randomize_layout;
+static inline struct user_namespace *i_user_ns(const struct inode *inode)
+{
+ return inode->i_sb->s_user_ns;
+}
+
/* Helper functions so that in most cases filesystems will
* not need to deal directly with kuid_t and kgid_t and can
* instead deal with the raw numeric values that are stored
@@ -1607,22 +1612,22 @@ struct super_block {
*/
static inline uid_t i_uid_read(const struct inode *inode)
{
- return from_kuid(inode->i_sb->s_user_ns, inode->i_uid);
+ return from_kuid(i_user_ns(inode), inode->i_uid);
}
static inline gid_t i_gid_read(const struct inode *inode)
{
- return from_kgid(inode->i_sb->s_user_ns, inode->i_gid);
+ return from_kgid(i_user_ns(inode), inode->i_gid);
}
static inline void i_uid_write(struct inode *inode, uid_t uid)
{
- inode->i_uid = make_kuid(inode->i_sb->s_user_ns, uid);
+ inode->i_uid = make_kuid(i_user_ns(inode), uid);
}
static inline void i_gid_write(struct inode *inode, gid_t gid)
{
- inode->i_gid = make_kgid(inode->i_sb->s_user_ns, gid);
+ inode->i_gid = make_kgid(i_user_ns(inode), gid);
}
/**