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authorSteve French <stfrench@microsoft.com>2020-10-23 06:03:14 +0300
committerSteve French <stfrench@microsoft.com>2020-10-23 23:38:10 +0300
commit2e4564b31b645f599d531e2c8bd0e47316e02223 (patch)
tree8327c6e83d7546e973f4cef68c670d4d2a6c204b /fs/cifs/smb2inode.c
parent0613ed91901b5f87afcd28b4560fb0aa37a0db13 (diff)
downloadlinux-2e4564b31b645f599d531e2c8bd0e47316e02223.tar.xz
smb3: add support for stat of WSL reparse points for special file types
This is needed so when mounting to Windows we do not misinterpret various special files created by Linux (WSL) as symlinks. An earlier patch addressed readdir. This patch fixes stat (getattr). With this patch:   File: /mnt1/char   Size: 0          Blocks: 0          IO Block: 16384  character special file Device: 34h/52d Inode: 844424930132069  Links: 1     Device type: 0,0 Access: (0755/crwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifo   Size: 0          Blocks: 0          IO Block: 16384  fifo Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0755/prwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/block   Size: 0          Blocks: 0          IO Block: 16384  block special file Device: 34h/52d Inode: 844424930132068  Links: 1     Device type: 0,0 Access: (0755/brwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500  Birth: - without the patch all show up incorrectly as symlinks with annoying "operation not supported error also returned"   File: /mnt1/charstat: cannot read symbolic link '/mnt1/char': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132069  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifostat: cannot read symbolic link '/mnt1/fifo': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/blockstat: cannot read symbolic link '/mnt1/block': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132068  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Diffstat (limited to 'fs/cifs/smb2inode.c')
-rw-r--r--fs/cifs/smb2inode.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index df6212e55e10..1f900b81c34a 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -506,7 +506,7 @@ move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
int
smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
- FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
+ FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
{
int rc;
struct smb2_file_all_info *smb2_data;
@@ -516,7 +516,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cached_fid *cfid = NULL;
*adjust_tz = false;
- *symlink = false;
+ *reparse = false;
smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
GFP_KERNEL);
@@ -548,7 +548,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
if (rc == -EOPNOTSUPP) {
- *symlink = true;
+ *reparse = true;
create_options |= OPEN_REPARSE_POINT;
/* Failed on a symbolic link - query a reparse point info */
@@ -570,7 +570,7 @@ out:
int
smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
- struct smb311_posix_qinfo *data, bool *adjust_tz, bool *symlink)
+ struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
{
int rc;
__u32 create_options = 0;
@@ -578,7 +578,7 @@ smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct smb311_posix_qinfo *smb2_data;
*adjust_tz = false;
- *symlink = false;
+ *reparse = false;
/* BB TODO: Make struct larger when add support for parsing owner SIDs */
smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
@@ -599,7 +599,7 @@ smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
if (rc == -EOPNOTSUPP) {
/* BB TODO: When support for special files added to Samba re-verify this path */
- *symlink = true;
+ *reparse = true;
create_options |= OPEN_REPARSE_POINT;
/* Failed on a symbolic link - query a reparse point info */