diff options
| author | Miklos Szeredi <mszeredi@suse.cz> | 2014-07-23 15:15:35 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-08-07 20:40:09 +0200 |
| commit | 9a423bb6e3577bb372942edfb5d9d26632741d43 (patch) | |
| tree | 73482f4b4fc8495d3695e6bbf0abf1db59cd6ae7 /fs/hostfs/hostfs_user.c | |
| parent | shmem: support RENAME_EXCHANGE (diff) | |
| download | linux-9a423bb6e3577bb372942edfb5d9d26632741d43.tar.xz linux-9a423bb6e3577bb372942edfb5d9d26632741d43.zip | |
hostfs: support rename flags
Support RENAME_NOREPLACE and RENAME_EXCHANGE flags on hostfs if the
underlying filesystem supports it.
Since renameat2(2) is not yet in any libc, use syscall(2) to invoke the
renameat2 syscall.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/hostfs/hostfs_user.c')
| -rw-r--r-- | fs/hostfs/hostfs_user.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c index 67838f3aa20a..9765dab95cbd 100644 --- a/fs/hostfs/hostfs_user.c +++ b/fs/hostfs/hostfs_user.c @@ -14,6 +14,7 @@ #include <sys/time.h> #include <sys/types.h> #include <sys/vfs.h> +#include <sys/syscall.h> #include "hostfs.h" #include <utime.h> @@ -360,6 +361,33 @@ int rename_file(char *from, char *to) return 0; } +int rename2_file(char *from, char *to, unsigned int flags) +{ + int err; + +#ifndef SYS_renameat2 +# ifdef __x86_64__ +# define SYS_renameat2 316 +# endif +# ifdef __i386__ +# define SYS_renameat2 353 +# endif +#endif + +#ifdef SYS_renameat2 + err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags); + if (err < 0) { + if (errno != ENOSYS) + return -errno; + else + return -EINVAL; + } + return 0; +#else + return -EINVAL; +#endif +} + int do_statfs(char *root, long *bsize_out, long long *blocks_out, long long *bfree_out, long long *bavail_out, long long *files_out, long long *ffree_out, |