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| author | Pavel Shilovsky <pshilov@microsoft.com> | 2019-01-16 11:48:42 -0800 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-01-24 14:52:06 -0600 |
| commit | 6a9cbdd1ceca1dc2359ddf082efe61b97c3e752b (patch) | |
| tree | 50e009bad1b6d8cce27aa1ee1fc8088a67951be1 /fs/cifs/smb2inode.c | |
| parent | 0fd1d37b0501efc6e295f56ab55cdaff784aa50c (diff) | |
| download | linux-rpi-6a9cbdd1ceca1dc2359ddf082efe61b97c3e752b.tar.gz linux-rpi-6a9cbdd1ceca1dc2359ddf082efe61b97c3e752b.tar.bz2 linux-rpi-6a9cbdd1ceca1dc2359ddf082efe61b97c3e752b.zip | |
CIFS: Fix mounts if the client is low on credits
If the server doesn't grant us at least 3 credits during the mount
we won't be able to complete it because query path info operation
requires 3 credits. Use the cached file handle if possible to allow
the mount to succeed.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/smb2inode.c')
| -rw-r--r-- | fs/cifs/smb2inode.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index f14533da3a93..01a76bccdb8d 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -293,6 +293,8 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, int rc; struct smb2_file_all_info *smb2_data; __u32 create_options = 0; + struct cifs_fid fid; + bool no_cached_open = tcon->nohandlecache; *adjust_tz = false; *symlink = false; @@ -301,6 +303,21 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, GFP_KERNEL); if (smb2_data == NULL) return -ENOMEM; + + /* If it is a root and its handle is cached then use it */ + if (!strlen(full_path) && !no_cached_open) { + rc = open_shroot(xid, tcon, &fid); + if (rc) + goto out; + rc = SMB2_query_info(xid, tcon, fid.persistent_fid, + fid.volatile_fid, smb2_data); + close_shroot(&tcon->crfid); + if (rc) + goto out; + move_smb2_info_to_cifs(data, smb2_data); + goto out; + } + if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; |