diff options
| -rw-r--r-- | fs/inode.c | 6 | ||||
| -rw-r--r-- | include/linux/fs.h | 36 |
2 files changed, 34 insertions, 8 deletions
diff --git a/fs/inode.c b/fs/inode.c index f0c4ace408e4..deb72f6c2b4f 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -135,8 +135,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_fop = &empty_fops; inode->__i_nlink = 1; inode->i_opflags = 0; - inode->i_uid = 0; - inode->i_gid = 0; + i_uid_write(inode, 0); + i_gid_write(inode, 0); atomic_set(&inode->i_writecount, 0); inode->i_size = 0; inode->i_blocks = 0; @@ -1732,7 +1732,7 @@ EXPORT_SYMBOL(inode_init_owner); */ bool inode_owner_or_capable(const struct inode *inode) { - if (current_fsuid() == inode->i_uid) + if (uid_eq(current_fsuid(), inode->i_uid)) return true; if (inode_capable(inode, CAP_FOWNER)) return true; diff --git a/include/linux/fs.h b/include/linux/fs.h index a6c5efbee0d7..797eb262d9f1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -402,6 +402,7 @@ struct inodes_stat_t { #include <linux/atomic.h> #include <linux/shrinker.h> #include <linux/migrate_mode.h> +#include <linux/uidgid.h> #include <asm/byteorder.h> @@ -469,8 +470,8 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, struct iattr { unsigned int ia_valid; umode_t ia_mode; - uid_t ia_uid; - gid_t ia_gid; + kuid_t ia_uid; + kgid_t ia_gid; loff_t ia_size; struct timespec ia_atime; struct timespec ia_mtime; @@ -761,8 +762,8 @@ struct posix_acl; struct inode { umode_t i_mode; unsigned short i_opflags; - uid_t i_uid; - gid_t i_gid; + kuid_t i_uid; + kgid_t i_gid; unsigned int i_flags; #ifdef CONFIG_FS_POSIX_ACL @@ -927,6 +928,31 @@ static inline void i_size_write(struct inode *inode, loff_t i_size) #endif } +/* 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 + * in the filesystem. + */ +static inline uid_t i_uid_read(const struct inode *inode) +{ + return from_kuid(&init_user_ns, inode->i_uid); +} + +static inline gid_t i_gid_read(const struct inode *inode) +{ + return from_kgid(&init_user_ns, inode->i_gid); +} + +static inline void i_uid_write(struct inode *inode, uid_t uid) +{ + inode->i_uid = make_kuid(&init_user_ns, uid); +} + +static inline void i_gid_write(struct inode *inode, gid_t gid) +{ + inode->i_gid = make_kgid(&init_user_ns, gid); +} + static inline unsigned iminor(const struct inode *inode) { return MINOR(inode->i_rdev); @@ -943,7 +969,7 @@ struct fown_struct { rwlock_t lock; /* protects pid, uid, euid fields */ struct pid *pid; /* pid or -pgrp where SIGIO should be sent */ enum pid_type pid_type; /* Kind of process group SIGIO should be sent to */ - uid_t uid, euid; /* uid/euid of process setting the owner */ + kuid_t uid, euid; /* uid/euid of process setting the owner */ int signum; /* posix.1b rt signal to be delivered on IO */ }; |