diff options
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 61 |
1 files changed, 58 insertions, 3 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index f715609b13f3..eb7b6573f322 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -58,13 +58,15 @@ bool traceSMB; bool enable_oplocks = true; bool linuxExtEnabled = true; bool lookupCacheEnabled = true; +bool disable_legacy_dialects; /* false by default */ unsigned int global_secflags = CIFSSEC_DEF; /* unsigned int ntlmv2_support = 0; */ unsigned int sign_CIFS_PDUs = 1; static const struct super_operations cifs_super_ops; unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; module_param(CIFSMaxBufSize, uint, 0444); -MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " +MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) " + "for CIFS requests. " "Default: 16384 Range: 8192 to 130048"); unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; module_param(cifs_min_rcv, uint, 0444); @@ -76,11 +78,21 @@ MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " "Range: 2 to 256"); unsigned int cifs_max_pending = CIFS_MAX_REQ; module_param(cifs_max_pending, uint, 0444); -MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " +MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for " + "CIFS/SMB1 dialect (N/A for SMB3) " "Default: 32767 Range: 2 to 32767."); module_param(enable_oplocks, bool, 0644); MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); +module_param(disable_legacy_dialects, bool, 0644); +MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be " + "helpful to restrict the ability to " + "override the default dialects (SMB2.1, " + "SMB3 and SMB3.02) on mount with old " + "dialects (CIFS/SMB1 and SMB2) since " + "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker" + " and less secure. Default: n/N/0"); + extern mempool_t *cifs_sm_req_poolp; extern mempool_t *cifs_req_poolp; extern mempool_t *cifs_mid_poolp; @@ -469,10 +481,20 @@ cifs_show_options(struct seq_file *s, struct dentry *root) seq_puts(s, ",persistenthandles"); else if (tcon->use_resilient) seq_puts(s, ",resilienthandles"); + +#ifdef CONFIG_CIFS_SMB311 + if (tcon->posix_extensions) + seq_puts(s, ",posix"); + else if (tcon->unix_ext) + seq_puts(s, ",unix"); + else + seq_puts(s, ",nounix"); +#else if (tcon->unix_ext) seq_puts(s, ",unix"); else seq_puts(s, ",nounix"); +#endif /* SMB311 */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) seq_puts(s, ",posixpaths"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) @@ -495,6 +517,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root) seq_puts(s, ",sfu"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) seq_puts(s, ",nobrl"); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE) + seq_puts(s, ",nohandlecache"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) seq_puts(s, ",cifsacl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) @@ -897,6 +921,17 @@ struct file_system_type cifs_fs_type = { /* .fs_flags */ }; MODULE_ALIAS_FS("cifs"); + +static struct file_system_type smb3_fs_type = { + .owner = THIS_MODULE, + .name = "smb3", + .mount = cifs_do_mount, + .kill_sb = cifs_kill_sb, + /* .fs_flags */ +}; +MODULE_ALIAS_FS("smb3"); +MODULE_ALIAS("smb3"); + const struct inode_operations cifs_dir_inode_ops = { .create = cifs_create, .atomic_open = cifs_atomic_open, @@ -1047,6 +1082,18 @@ out: return rc; } +/* + * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync() + * is a dummy operation. + */ +static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync) +{ + cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n", + file, datasync); + + return 0; +} + static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, struct file *dst_file, loff_t destoff, size_t len, unsigned int flags) @@ -1181,6 +1228,7 @@ const struct file_operations cifs_dir_ops = { .copy_file_range = cifs_copy_file_range, .clone_file_range = cifs_clone_file_range, .llseek = generic_file_llseek, + .fsync = cifs_dir_fsync, }; static void @@ -1422,6 +1470,12 @@ init_cifs(void) if (rc) goto out_init_cifs_idmap; + rc = register_filesystem(&smb3_fs_type); + if (rc) { + unregister_filesystem(&cifs_fs_type); + goto out_init_cifs_idmap; + } + return 0; out_init_cifs_idmap: @@ -1452,8 +1506,9 @@ out_clean_proc: static void __exit exit_cifs(void) { - cifs_dbg(NOISY, "exit_cifs\n"); + cifs_dbg(NOISY, "exit_smb3\n"); unregister_filesystem(&cifs_fs_type); + unregister_filesystem(&smb3_fs_type); cifs_dfs_release_automount_timer(); #ifdef CONFIG_CIFS_ACL exit_cifs_idmap(); |