6.6-stable review patch. If anyone has any objections, please let me know.
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From: Steve French stfrench@microsoft.com
[ Upstream commit b0348e459c836abdb0f4b967e006d15c77cf1c87 ]
Remove duplicate code and add new helper for creating special files in SFU (Services for UNIX) format that can be shared by SMB1+ code.
Signed-off-by: Paulo Alcantara (SUSE) pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/client/cifsproto.h | 3 ++ fs/smb/client/smb1ops.c | 80 ++++------------------------------- fs/smb/client/smb2ops.c | 89 ++++++++++++++++++--------------------- 3 files changed, 52 insertions(+), 120 deletions(-)
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index 1bdad33580b57..9480cdb9588d5 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -673,6 +673,9 @@ char *extract_sharename(const char *unc); int parse_reparse_point(struct reparse_data_buffer *buf, u32 plen, struct cifs_sb_info *cifs_sb, bool unicode, struct cifs_open_info_data *data); +int cifs_sfu_make_node(unsigned int xid, struct inode *inode, + struct dentry *dentry, struct cifs_tcon *tcon, + const char *full_path, umode_t mode, dev_t dev);
#ifdef CONFIG_CIFS_DFS_UPCALL static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c index 1aebcf95c1951..212ec6f66ec65 100644 --- a/fs/smb/client/smb1ops.c +++ b/fs/smb/client/smb1ops.c @@ -1041,15 +1041,7 @@ cifs_make_node(unsigned int xid, struct inode *inode, { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct inode *newinode = NULL; - int rc = -EPERM; - struct cifs_open_info_data buf = {}; - struct cifs_io_parms io_parms; - __u32 oplock = 0; - struct cifs_fid fid; - struct cifs_open_parms oparms; - unsigned int bytes_written; - struct win_dev *pdev; - struct kvec iov[2]; + int rc;
if (tcon->unix_ext) { /* @@ -1083,74 +1075,18 @@ cifs_make_node(unsigned int xid, struct inode *inode, d_instantiate(dentry, newinode); return rc; } - /* - * SMB1 SFU emulation: should work with all servers, but only - * support block and char device (no socket & fifo) + * Check if mounted with mount parm 'sfu' mount parm. + * SFU emulation should work with all servers, but only + * supports block and char device (no socket & fifo), + * and was used by default in earlier versions of Windows */ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) - return rc; - - if (!S_ISCHR(mode) && !S_ISBLK(mode)) - return rc; - - cifs_dbg(FYI, "sfu compat create special file\n"); - - oparms = (struct cifs_open_parms) { - .tcon = tcon, - .cifs_sb = cifs_sb, - .desired_access = GENERIC_WRITE, - .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | - CREATE_OPTION_SPECIAL), - .disposition = FILE_CREATE, - .path = full_path, - .fid = &fid, - }; - - if (tcon->ses->server->oplocks) - oplock = REQ_OPLOCK; - else - oplock = 0; - rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf); - if (rc) - return rc; - - /* - * BB Do not bother to decode buf since no local inode yet to put - * timestamps in, but we can reuse it safely. - */ - - pdev = (struct win_dev *)&buf.fi; - io_parms.pid = current->tgid; - io_parms.tcon = tcon; - io_parms.offset = 0; - io_parms.length = sizeof(struct win_dev); - iov[1].iov_base = &buf.fi; - iov[1].iov_len = sizeof(struct win_dev); - if (S_ISCHR(mode)) { - memcpy(pdev->type, "IntxCHR", 8); - pdev->major = cpu_to_le64(MAJOR(dev)); - pdev->minor = cpu_to_le64(MINOR(dev)); - rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, - &bytes_written, iov, 1); - } else if (S_ISBLK(mode)) { - memcpy(pdev->type, "IntxBLK", 8); - pdev->major = cpu_to_le64(MAJOR(dev)); - pdev->minor = cpu_to_le64(MINOR(dev)); - rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, - &bytes_written, iov, 1); - } - tcon->ses->server->ops->close(xid, tcon, &fid); - d_drop(dentry); - - /* FIXME: add code here to set EAs */ - - cifs_free_open_info(&buf); - return rc; + return -EPERM; + return cifs_sfu_make_node(xid, inode, dentry, tcon, + full_path, mode, dev); }
- - struct smb_version_operations smb1_operations = { .send_cancel = send_nt_cancel, .compare_fids = cifs_compare_fids, diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 04fea874d0a33..2b892a736e5f9 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -5105,41 +5105,24 @@ static int smb2_next_header(struct TCP_Server_Info *server, char *buf, return 0; }
-static int -smb2_make_node(unsigned int xid, struct inode *inode, - struct dentry *dentry, struct cifs_tcon *tcon, - const char *full_path, umode_t mode, dev_t dev) +int cifs_sfu_make_node(unsigned int xid, struct inode *inode, + struct dentry *dentry, struct cifs_tcon *tcon, + const char *full_path, umode_t mode, dev_t dev) { - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - int rc = -EPERM; struct cifs_open_info_data buf = {}; - struct cifs_io_parms io_parms = {0}; - __u32 oplock = 0; - struct cifs_fid fid; + struct TCP_Server_Info *server = tcon->ses->server; struct cifs_open_parms oparms; + struct cifs_io_parms io_parms = {}; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifs_fid fid; unsigned int bytes_written; struct win_dev *pdev; struct kvec iov[2]; - - /* - * Check if mounted with mount parm 'sfu' mount parm. - * SFU emulation should work with all servers, but only - * supports block and char device (no socket & fifo), - * and was used by default in earlier versions of Windows - */ - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) - return rc; - - /* - * TODO: Add ability to create instead via reparse point. Windows (e.g. - * their current NFS server) uses this approach to expose special files - * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions - */ + __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; + int rc;
if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode)) - return rc; - - cifs_dbg(FYI, "sfu compat create special file\n"); + return -EPERM;
oparms = (struct cifs_open_parms) { .tcon = tcon, @@ -5152,11 +5135,7 @@ smb2_make_node(unsigned int xid, struct inode *inode, .fid = &fid, };
- if (tcon->ses->server->oplocks) - oplock = REQ_OPLOCK; - else - oplock = 0; - rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf); + rc = server->ops->open(xid, &oparms, &oplock, &buf); if (rc) return rc;
@@ -5164,42 +5143,56 @@ smb2_make_node(unsigned int xid, struct inode *inode, * BB Do not bother to decode buf since no local inode yet to put * timestamps in, but we can reuse it safely. */ - pdev = (struct win_dev *)&buf.fi; io_parms.pid = current->tgid; io_parms.tcon = tcon; - io_parms.offset = 0; - io_parms.length = sizeof(struct win_dev); - iov[1].iov_base = &buf.fi; - iov[1].iov_len = sizeof(struct win_dev); + io_parms.length = sizeof(*pdev); + iov[1].iov_base = pdev; + iov[1].iov_len = sizeof(*pdev); if (S_ISCHR(mode)) { memcpy(pdev->type, "IntxCHR", 8); pdev->major = cpu_to_le64(MAJOR(dev)); pdev->minor = cpu_to_le64(MINOR(dev)); - rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, - &bytes_written, iov, 1); } else if (S_ISBLK(mode)) { memcpy(pdev->type, "IntxBLK", 8); pdev->major = cpu_to_le64(MAJOR(dev)); pdev->minor = cpu_to_le64(MINOR(dev)); - rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, - &bytes_written, iov, 1); } else if (S_ISFIFO(mode)) { memcpy(pdev->type, "LnxFIFO", 8); - pdev->major = 0; - pdev->minor = 0; - rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, - &bytes_written, iov, 1); } - tcon->ses->server->ops->close(xid, tcon, &fid); - d_drop(dentry);
+ rc = server->ops->sync_write(xid, &fid, &io_parms, + &bytes_written, iov, 1); + server->ops->close(xid, tcon, &fid); + d_drop(dentry); /* FIXME: add code here to set EAs */ - cifs_free_open_info(&buf); return rc; }
+static int smb2_make_node(unsigned int xid, struct inode *inode, + struct dentry *dentry, struct cifs_tcon *tcon, + const char *full_path, umode_t mode, dev_t dev) +{ + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + + /* + * Check if mounted with mount parm 'sfu' mount parm. + * SFU emulation should work with all servers, but only + * supports block and char device (no socket & fifo), + * and was used by default in earlier versions of Windows + */ + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) + return -EPERM; + /* + * TODO: Add ability to create instead via reparse point. Windows (e.g. + * their current NFS server) uses this approach to expose special files + * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions + */ + return cifs_sfu_make_node(xid, inode, dentry, tcon, + full_path, mode, dev); +} + #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY struct smb_version_operations smb20_operations = { .compare_fids = smb2_compare_fids,