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Support idmapped mount

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Adds support for idmapped mounts.  Supported as of Linux 5.12 this 
functionality allows user and group IDs to be remapped without changing 
their state on disk.  This can be useful for portable home directories
and a variety of container related use cases.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #12923
Closes #13671
This commit is contained in:
youzhongyang
2022-10-19 14:17:09 -04:00
committed by GitHub
parent eaaed26ffb
commit 2a068a1394
41 changed files with 1636 additions and 166 deletions
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include/os/linux/zfs/sys/policy.h
+2 -2
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@@ -47,13 +47,13 @@ int secpolicy_vnode_create_gid(const cred_t *);
int secpolicy_vnode_remove(const cred_t *);
int secpolicy_vnode_setdac(const cred_t *, uid_t);
int secpolicy_vnode_setid_retain(struct znode *, const cred_t *, boolean_t);
int secpolicy_vnode_setids_setgids(const cred_t *, gid_t);
int secpolicy_vnode_setids_setgids(const cred_t *, gid_t, zuserns_t *);
int secpolicy_zinject(const cred_t *);
int secpolicy_zfs(const cred_t *);
int secpolicy_zfs_proc(const cred_t *, proc_t *);
void secpolicy_setid_clear(vattr_t *, cred_t *);
int secpolicy_setid_setsticky_clear(struct inode *, vattr_t *,
const vattr_t *, cred_t *);
const vattr_t *, cred_t *, zuserns_t *);
int secpolicy_xvattr(xvattr_t *, uid_t, cred_t *, mode_t);
int secpolicy_vnode_setattr(cred_t *, struct inode *, struct vattr *,
const struct vattr *, int, int (void *, int, cred_t *), void *);
include/os/linux/zfs/sys/zfs_vnops_os.h
+9 -6
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@@ -45,22 +45,25 @@ extern int zfs_write_simple(znode_t *zp, const void *data, size_t len,
extern int zfs_lookup(znode_t *dzp, char *nm, znode_t **zpp, int flags,
cred_t *cr, int *direntflags, pathname_t *realpnp);
extern int zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl,
int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp);
int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp,
zuserns_t *mnt_ns);
extern int zfs_tmpfile(struct inode *dip, vattr_t *vapzfs, int excl,
int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp);
int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp,
zuserns_t *mnt_ns);
extern int zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags);
extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp);
znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp, zuserns_t *mnt_ns);
extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
cred_t *cr, int flags);
extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
extern int zfs_getattr_fast(struct user_namespace *, struct inode *ip,
struct kstat *sp);
extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr,
zuserns_t *mnt_ns);
extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
char *tnm, cred_t *cr, int flags);
char *tnm, cred_t *cr, int flags, zuserns_t *mnt_ns);
extern int zfs_symlink(znode_t *dzp, char *name, vattr_t *vap,
char *link, znode_t **zpp, cred_t *cr, int flags);
char *link, znode_t **zpp, cred_t *cr, int flags, zuserns_t *mnt_ns);
extern int zfs_readlink(struct inode *ip, zfs_uio_t *uio, cred_t *cr);
extern int zfs_link(znode_t *tdzp, znode_t *szp,
char *name, cred_t *cr, int flags);
include/os/linux/zfs/sys/zpl.h
+1 -1
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@@ -39,7 +39,7 @@
/* zpl_inode.c */
extern void zpl_vap_init(vattr_t *vap, struct inode *dir,
umode_t mode, cred_t *cr);
umode_t mode, cred_t *cr, zuserns_t *mnt_ns);
extern const struct inode_operations zpl_inode_operations;
extern const struct inode_operations zpl_dir_inode_operations;