From bd74bc9b3a8c5194a121c5f46d2c8120dced26ba Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 4 Dec 2024 17:46:00 -0600 Subject: [PATCH] smb3.1.1: fix posix mounts to older servers commit ddca5023091588eb303e3c0097d95c325992d05f upstream. Some servers which implement the SMB3.1.1 POSIX extensions did not set the file type in the mode in the infolevel 100 response. With the recent changes for checking the file type via the mode field, this can cause the root directory to be reported incorrectly and mounts (e.g. to ksmbd) to fail. Fixes: 6a832bc8bbb2 ("fs/smb/client: Implement new SMB3 POSIX type") Cc: stable@vger.kernel.org Acked-by: Paulo Alcantara (Red Hat) Cc: Ralph Boehme Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/smb/client/cifsproto.h | 2 +- fs/smb/client/inode.c | 11 ++++++++--- fs/smb/client/readdir.c | 3 ++- 3 files changed, 11 insertions(+), 5 deletions(-) diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index a4450fd4dfe9..83692bf60007 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -684,7 +684,7 @@ int parse_reparse_point(struct reparse_data_buffer *buf, 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); -umode_t wire_mode_to_posix(u32 wire); +umode_t wire_mode_to_posix(u32 wire, bool is_dir); #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/inode.c b/fs/smb/client/inode.c index 0245d7ef28b6..ce7e0aed8f7d 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -731,13 +731,17 @@ static u32 wire_filetype_to_posix(u32 wire_type) return posix_filetypes[wire_type]; } -umode_t wire_mode_to_posix(u32 wire) +umode_t wire_mode_to_posix(u32 wire, bool is_dir) { u32 wire_type; u32 mode; wire_type = (wire & POSIX_FILETYPE_MASK) >> POSIX_FILETYPE_SHIFT; - mode = (wire_perms_to_posix(wire) | wire_filetype_to_posix(wire_type)); + /* older servers do not set POSIX file type in the mode field in the response */ + if ((wire_type == 0) && is_dir) + mode = wire_perms_to_posix(wire) | S_IFDIR; + else + mode = (wire_perms_to_posix(wire) | wire_filetype_to_posix(wire_type)); return (umode_t)mode; } @@ -777,7 +781,8 @@ static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, fattr->cf_bytes = le64_to_cpu(info->AllocationSize); fattr->cf_createtime = le64_to_cpu(info->CreationTime); fattr->cf_nlink = le32_to_cpu(info->HardLinks); - fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode)); + fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode), + fattr->cf_cifsattrs & ATTR_DIRECTORY); if (cifs_open_data_reparse(data) && cifs_reparse_point_to_fattr(cifs_sb, fattr, data)) diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c index 1a3dc2659f1e..3cffdf3975a2 100644 --- a/fs/smb/client/readdir.c +++ b/fs/smb/client/readdir.c @@ -261,7 +261,8 @@ cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info, fattr->cf_cifstag = le32_to_cpu(info->ReparseTag); /* The Mode field in the response can now include the file type as well */ - fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode)); + fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode), + fattr->cf_cifsattrs & ATTR_DIRECTORY); fattr->cf_dtype = S_DT(le32_to_cpu(info->Mode)); switch (fattr->cf_mode & S_IFMT) {