From ca4b2c4607433033e9c4f4659f809af4261d8992 Mon Sep 17 00:00:00 2001 From: Ralph Boehme Date: Fri, 15 Nov 2024 13:15:50 +0100 Subject: [PATCH 1/5] fs/smb/client: avoid querying SMB2_OP_QUERY_WSL_EA for SMB3 POSIX Avoid extra roundtrip Cc: stable@vger.kernel.org Acked-by: Paulo Alcantara (Red Hat) Signed-off-by: Ralph Boehme Signed-off-by: Steve French --- fs/smb/client/smb2inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c index a188908914fe..a55f0044d30b 100644 --- a/fs/smb/client/smb2inode.c +++ b/fs/smb/client/smb2inode.c @@ -943,7 +943,8 @@ int smb2_query_path_info(const unsigned int xid, if (rc || !data->reparse_point) goto out; - cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA; + if (!tcon->posix_extensions) + cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA; /* * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create * response. From 6a832bc8bbb22350f7ffe6ecb2d36f261bb96023 Mon Sep 17 00:00:00 2001 From: Ralph Boehme Date: Fri, 15 Nov 2024 19:21:04 +0100 Subject: [PATCH 2/5] fs/smb/client: Implement new SMB3 POSIX type Fixes special files against current Samba. On the Samba server: insgesamt 20 131958 brw-r--r-- 1 root root 0, 0 15. Nov 12:04 blockdev 131965 crw-r--r-- 1 root root 1, 1 15. Nov 12:04 chardev 131966 prw-r--r-- 1 samba samba 0 15. Nov 12:05 fifo 131953 -rw-rwxrw-+ 2 samba samba 4 18. Nov 11:37 file 131953 -rw-rwxrw-+ 2 samba samba 4 18. Nov 11:37 hardlink 131957 lrwxrwxrwx 1 samba samba 4 15. Nov 12:03 symlink -> file 131954 -rwxrwxr-x+ 1 samba samba 0 18. Nov 15:28 symlinkoversmb Before: ls: cannot access '/mnt/smb3unix/posix/blockdev': No data available ls: cannot access '/mnt/smb3unix/posix/chardev': No data available ls: cannot access '/mnt/smb3unix/posix/symlinkoversmb': No data available ls: cannot access '/mnt/smb3unix/posix/fifo': No data available ls: cannot access '/mnt/smb3unix/posix/symlink': No data available total 16 ? -????????? ? ? ? ? ? blockdev ? -????????? ? ? ? ? ? chardev ? -????????? ? ? ? ? ? fifo 131953 -rw-rwxrw- 2 root samba 4 Nov 18 11:37 file 131953 -rw-rwxrw- 2 root samba 4 Nov 18 11:37 hardlink ? -????????? ? ? ? ? ? symlink ? -????????? ? ? ? ? ? symlinkoversmb After: insgesamt 21 131958 brw-r--r-- 1 root root 0, 0 15. Nov 12:04 blockdev 131965 crw-r--r-- 1 root root 1, 1 15. Nov 12:04 chardev 131966 prw-r--r-- 1 root samba 0 15. Nov 12:05 fifo 131953 -rw-rwxrw- 2 root samba 4 18. Nov 11:37 file 131953 -rw-rwxrw- 2 root samba 4 18. Nov 11:37 hardlink 131957 lrwxrwxrwx 1 root samba 4 15. Nov 12:03 symlink -> file 131954 lrwxrwxr-x 1 root samba 23 18. Nov 15:28 symlinkoversmb -> mnt/smb3unix/posix/file Cc: stable@vger.kernel.org Acked-by: Paulo Alcantara (Red Hat) Signed-off-by: Ralph Boehme Signed-off-by: Steve French --- fs/smb/client/cifsproto.h | 1 + fs/smb/client/inode.c | 89 ++++++++++++++++++++++++++++++++++---- fs/smb/client/readdir.c | 35 +++++++-------- fs/smb/client/reparse.c | 90 ++++++++++++++++++++++++--------------- 4 files changed, 152 insertions(+), 63 deletions(-) diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index bbaaf16af20f..90e3297ea847 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -669,6 +669,7 @@ int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 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); #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 42c030687918..ef913d65c67f 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -746,6 +746,84 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, #endif } +#define POSIX_TYPE_FILE 0 +#define POSIX_TYPE_DIR 1 +#define POSIX_TYPE_SYMLINK 2 +#define POSIX_TYPE_CHARDEV 3 +#define POSIX_TYPE_BLKDEV 4 +#define POSIX_TYPE_FIFO 5 +#define POSIX_TYPE_SOCKET 6 + +#define POSIX_X_OTH 0000001 +#define POSIX_W_OTH 0000002 +#define POSIX_R_OTH 0000004 +#define POSIX_X_GRP 0000010 +#define POSIX_W_GRP 0000020 +#define POSIX_R_GRP 0000040 +#define POSIX_X_USR 0000100 +#define POSIX_W_USR 0000200 +#define POSIX_R_USR 0000400 +#define POSIX_STICKY 0001000 +#define POSIX_SET_GID 0002000 +#define POSIX_SET_UID 0004000 + +#define POSIX_OTH_MASK 0000007 +#define POSIX_GRP_MASK 0000070 +#define POSIX_USR_MASK 0000700 +#define POSIX_PERM_MASK 0000777 +#define POSIX_FILETYPE_MASK 0070000 + +#define POSIX_FILETYPE_SHIFT 12 + +static u32 wire_perms_to_posix(u32 wire) +{ + u32 mode = 0; + + mode |= (wire & POSIX_X_OTH) ? S_IXOTH : 0; + mode |= (wire & POSIX_W_OTH) ? S_IWOTH : 0; + mode |= (wire & POSIX_R_OTH) ? S_IROTH : 0; + mode |= (wire & POSIX_X_GRP) ? S_IXGRP : 0; + mode |= (wire & POSIX_W_GRP) ? S_IWGRP : 0; + mode |= (wire & POSIX_R_GRP) ? S_IRGRP : 0; + mode |= (wire & POSIX_X_USR) ? S_IXUSR : 0; + mode |= (wire & POSIX_W_USR) ? S_IWUSR : 0; + mode |= (wire & POSIX_R_USR) ? S_IRUSR : 0; + mode |= (wire & POSIX_STICKY) ? S_ISVTX : 0; + mode |= (wire & POSIX_SET_GID) ? S_ISGID : 0; + mode |= (wire & POSIX_SET_UID) ? S_ISUID : 0; + + return mode; +} + +static u32 posix_filetypes[] = { + S_IFREG, + S_IFDIR, + S_IFLNK, + S_IFCHR, + S_IFBLK, + S_IFIFO, + S_IFSOCK +}; + +static u32 wire_filetype_to_posix(u32 wire_type) +{ + if (wire_type >= ARRAY_SIZE(posix_filetypes)) { + pr_warn("Unexpected type %u", wire_type); + return 0; + } + return posix_filetypes[wire_type]; +} + +umode_t wire_mode_to_posix(u32 wire) +{ + 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)); + return (umode_t)mode; +} + /* Fill a cifs_fattr struct with info from POSIX info struct */ static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct cifs_open_info_data *data, @@ -782,20 +860,13 @@ 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 = (umode_t) le32_to_cpu(info->Mode); + fattr->cf_mode = wire_mode_to_posix(le32_to_cpu(info->Mode)); if (cifs_open_data_reparse(data) && cifs_reparse_point_to_fattr(cifs_sb, fattr, data)) goto out_reparse; - fattr->cf_mode &= ~S_IFMT; - if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { - fattr->cf_mode |= S_IFDIR; - fattr->cf_dtype = DT_DIR; - } else { /* file */ - fattr->cf_mode |= S_IFREG; - fattr->cf_dtype = DT_REG; - } + fattr->cf_dtype = S_DT(fattr->cf_mode); out_reparse: if (S_ISLNK(fattr->cf_mode)) { diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c index b3a8f9c6fcff..f878bcdbd319 100644 --- a/fs/smb/client/readdir.c +++ b/fs/smb/client/readdir.c @@ -241,31 +241,28 @@ cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info, fattr->cf_nlink = le32_to_cpu(info->HardLinks); fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); - /* - * Since we set the inode type below we need to mask off - * to avoid strange results if bits set above. - * XXX: why not make server&client use the type bits? - */ - fattr->cf_mode = le32_to_cpu(info->Mode) & ~S_IFMT; + if (fattr->cf_cifsattrs & ATTR_REPARSE) + 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_dtype = S_DT(le32_to_cpu(info->Mode)); + + switch (fattr->cf_mode & S_IFMT) { + case S_IFLNK: + case S_IFBLK: + case S_IFCHR: + fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; + break; + default: + break; + } cifs_dbg(FYI, "posix fattr: dev %d, reparse %d, mode %o\n", le32_to_cpu(info->DeviceId), le32_to_cpu(info->ReparseTag), le32_to_cpu(info->Mode)); - if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { - fattr->cf_mode |= S_IFDIR; - fattr->cf_dtype = DT_DIR; - } else { - /* - * mark anything that is not a dir as regular - * file. special files should have the REPARSE - * attribute and will be marked as needing revaluation - */ - fattr->cf_mode |= S_IFREG; - fattr->cf_dtype = DT_REG; - } - sid_to_id(cifs_sb, &parsed.owner, fattr, SIDOWNER); sid_to_id(cifs_sb, &parsed.group, fattr, SIDGROUP); } diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c index e81d2d78ddb7..50b1aba20008 100644 --- a/fs/smb/client/reparse.c +++ b/fs/smb/client/reparse.c @@ -803,44 +803,60 @@ static void wsl_to_fattr(struct cifs_open_info_data *data, fattr->cf_dtype = S_DT(fattr->cf_mode); } +static bool posix_reparse_to_fattr(struct cifs_sb_info *cifs_sb, + struct cifs_fattr *fattr, + struct cifs_open_info_data *data) +{ + struct reparse_posix_data *buf = data->reparse.posix; + + + if (buf == NULL) + return true; + + if (le16_to_cpu(buf->ReparseDataLength) < sizeof(buf->InodeType)) { + WARN_ON_ONCE(1); + return false; + } + + switch (le64_to_cpu(buf->InodeType)) { + case NFS_SPECFILE_CHR: + if (le16_to_cpu(buf->ReparseDataLength) != sizeof(buf->InodeType) + 8) { + WARN_ON_ONCE(1); + return false; + } + fattr->cf_mode |= S_IFCHR; + fattr->cf_rdev = reparse_mkdev(buf->DataBuffer); + break; + case NFS_SPECFILE_BLK: + if (le16_to_cpu(buf->ReparseDataLength) != sizeof(buf->InodeType) + 8) { + WARN_ON_ONCE(1); + return false; + } + fattr->cf_mode |= S_IFBLK; + fattr->cf_rdev = reparse_mkdev(buf->DataBuffer); + break; + case NFS_SPECFILE_FIFO: + fattr->cf_mode |= S_IFIFO; + break; + case NFS_SPECFILE_SOCK: + fattr->cf_mode |= S_IFSOCK; + break; + case NFS_SPECFILE_LNK: + fattr->cf_mode |= S_IFLNK; + break; + default: + WARN_ON_ONCE(1); + return false; + } + return true; +} + bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct cifs_open_info_data *data) { - struct reparse_posix_data *buf = data->reparse.posix; u32 tag = data->reparse.tag; - - if (tag == IO_REPARSE_TAG_NFS && buf) { - if (le16_to_cpu(buf->ReparseDataLength) < sizeof(buf->InodeType)) - return false; - switch (le64_to_cpu(buf->InodeType)) { - case NFS_SPECFILE_CHR: - if (le16_to_cpu(buf->ReparseDataLength) != sizeof(buf->InodeType) + 8) - return false; - fattr->cf_mode |= S_IFCHR; - fattr->cf_rdev = reparse_mkdev(buf->DataBuffer); - break; - case NFS_SPECFILE_BLK: - if (le16_to_cpu(buf->ReparseDataLength) != sizeof(buf->InodeType) + 8) - return false; - fattr->cf_mode |= S_IFBLK; - fattr->cf_rdev = reparse_mkdev(buf->DataBuffer); - break; - case NFS_SPECFILE_FIFO: - fattr->cf_mode |= S_IFIFO; - break; - case NFS_SPECFILE_SOCK: - fattr->cf_mode |= S_IFSOCK; - break; - case NFS_SPECFILE_LNK: - fattr->cf_mode |= S_IFLNK; - break; - default: - WARN_ON_ONCE(1); - return false; - } - goto out; - } + bool ok; switch (tag) { case IO_REPARSE_TAG_INTERNAL: @@ -860,15 +876,19 @@ bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, case IO_REPARSE_TAG_LX_BLK: wsl_to_fattr(data, cifs_sb, tag, fattr); break; + case IO_REPARSE_TAG_NFS: + ok = posix_reparse_to_fattr(cifs_sb, fattr, data); + if (!ok) + return false; + break; case 0: /* SMB1 symlink */ case IO_REPARSE_TAG_SYMLINK: - case IO_REPARSE_TAG_NFS: fattr->cf_mode |= S_IFLNK; break; default: return false; } -out: + fattr->cf_dtype = S_DT(fattr->cf_mode); return true; } From 8cb0bc5436351de8a11eef13b7367d64cc0d6c68 Mon Sep 17 00:00:00 2001 From: Ralph Boehme Date: Mon, 25 Nov 2024 16:19:56 +0100 Subject: [PATCH 3/5] fs/smb/client: cifs_prime_dcache() for SMB3 POSIX reparse points Spares an extra revalidation request Cc: stable@vger.kernel.org Acked-by: Paulo Alcantara (Red Hat) Signed-off-by: Ralph Boehme Signed-off-by: Steve French --- fs/smb/client/readdir.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c index f878bcdbd319..b906bf78af1e 100644 --- a/fs/smb/client/readdir.c +++ b/fs/smb/client/readdir.c @@ -71,6 +71,8 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name, struct inode *inode; struct super_block *sb = parent->d_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + bool posix = cifs_sb_master_tcon(cifs_sb)->posix_extensions; + bool reparse_need_reval = false; DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); int rc; @@ -85,7 +87,21 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name, * this spares us an invalidation. */ retry: - if ((fattr->cf_cifsattrs & ATTR_REPARSE) || + if (posix) { + switch (fattr->cf_mode & S_IFMT) { + case S_IFLNK: + case S_IFBLK: + case S_IFCHR: + reparse_need_reval = true; + break; + default: + break; + } + } else if (fattr->cf_cifsattrs & ATTR_REPARSE) { + reparse_need_reval = true; + } + + if (reparse_need_reval || (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)) return; From ddca5023091588eb303e3c0097d95c325992d05f Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 4 Dec 2024 17:46:00 -0600 Subject: [PATCH 4/5] smb3.1.1: fix posix mounts to older servers 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 --- 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 90e3297ea847..754417cb3294 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -669,7 +669,7 @@ int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, 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 ef913d65c67f..668098d3b108 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -814,13 +814,17 @@ 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; } @@ -860,7 +864,8 @@ 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 b906bf78af1e..273358d20a46 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) { From c32b624fa4f7ca5a2ff217a0b1b2f1352bb4ec11 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Fri, 6 Dec 2024 11:49:07 -0300 Subject: [PATCH 5/5] smb: client: fix potential race in cifs_put_tcon() dfs_cache_refresh() delayed worker could race with cifs_put_tcon(), so make sure to call list_replace_init() on @tcon->dfs_ses_list after kworker is cancelled or finished. Fixes: 4f42a8b54b5c ("smb: client: fix DFS interlink failover") Signed-off-by: Paulo Alcantara (Red Hat) Signed-off-by: Steve French --- fs/smb/client/connect.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index 56b3a9eb9b05..2372538a1211 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -2532,9 +2532,6 @@ cifs_put_tcon(struct cifs_tcon *tcon, enum smb3_tcon_ref_trace trace) list_del_init(&tcon->tcon_list); tcon->status = TID_EXITING; -#ifdef CONFIG_CIFS_DFS_UPCALL - list_replace_init(&tcon->dfs_ses_list, &ses_list); -#endif spin_unlock(&tcon->tc_lock); spin_unlock(&cifs_tcp_ses_lock); @@ -2542,6 +2539,7 @@ cifs_put_tcon(struct cifs_tcon *tcon, enum smb3_tcon_ref_trace trace) cancel_delayed_work_sync(&tcon->query_interfaces); #ifdef CONFIG_CIFS_DFS_UPCALL cancel_delayed_work_sync(&tcon->dfs_cache_work); + list_replace_init(&tcon->dfs_ses_list, &ses_list); #endif if (tcon->use_witness) {