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| author | ChenXiaoSong <chenxiaosong2@huawei.com> | 2022-03-29 19:32:08 +0800 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2022-03-29 22:14:00 -0400 |
| commit | b243874f6f9568b2daf1a00e9222cacdc15e159c (patch) | |
| tree | 8b367ae6df9cbcf655baca2c9a1e63311706e33a /fs/nfs/internal.h | |
| parent | ab0fc21bc7105b54bafd85bd8b82742f9e68898a (diff) | |
| download | linux-stable-b243874f6f9568b2daf1a00e9222cacdc15e159c.tar.gz linux-stable-b243874f6f9568b2daf1a00e9222cacdc15e159c.tar.bz2 linux-stable-b243874f6f9568b2daf1a00e9222cacdc15e159c.zip | |
NFSv4: fix open failure with O_ACCMODE flag
open() with O_ACCMODE|O_DIRECT flags secondly will fail.
Reproducer:
1. mount -t nfs -o vers=4.2 $server_ip:/ /mnt/
2. fd = open("/mnt/file", O_ACCMODE|O_DIRECT|O_CREAT)
3. close(fd)
4. fd = open("/mnt/file", O_ACCMODE|O_DIRECT)
Server nfsd4_decode_share_access() will fail with error nfserr_bad_xdr when
client use incorrect share access mode of 0.
Fix this by using NFS4_SHARE_ACCESS_BOTH share access mode in client,
just like firstly opening.
Fixes: ce4ef7c0a8a05 ("NFS: Split out NFS v4 file operations")
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/internal.h')
| -rw-r--r-- | fs/nfs/internal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 57b0497105c8..7eefa16ed381 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -42,6 +42,16 @@ static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) return true; } +static inline fmode_t flags_to_mode(int flags) +{ + fmode_t res = (__force fmode_t)flags & FMODE_EXEC; + if ((flags & O_ACCMODE) != O_WRONLY) + res |= FMODE_READ; + if ((flags & O_ACCMODE) != O_RDONLY) + res |= FMODE_WRITE; + return res; +} + /* * Note: RFC 1813 doesn't limit the number of auth flavors that * a server can return, so make something up. |