1 files changed, 255 insertions, 135 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 5c412b33cd7c..bc4b12ca537b 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -35,6 +35,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/namei.h>
 #include <net/ipv6.h>
 #include "cifsfs.h"
 #include "cifspdu.h"
@@ -104,66 +105,31 @@ cifs_sb_deactive(struct super_block *sb)
 }
 
 static int
-cifs_read_super(struct super_block *sb, void *data,
-		const char *devname, int silent)
+cifs_read_super(struct super_block *sb)
 {
 	struct inode *inode;
 	struct cifs_sb_info *cifs_sb;
 	int rc = 0;
 
-	/* BB should we make this contingent on mount parm? */
-	sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
-	sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
 	cifs_sb = CIFS_SB(sb);
-	if (cifs_sb == NULL)
-		return -ENOMEM;
 
-	spin_lock_init(&cifs_sb->tlink_tree_lock);
-	cifs_sb->tlink_tree = RB_ROOT;
-
-	rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
-	if (rc) {
-		kfree(cifs_sb);
-		return rc;
-	}
-	cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
-
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	/* copy mount params to sb for use in submounts */
-	/* BB: should we move this after the mount so we
-	 * do not have to do the copy on failed mounts?
-	 * BB: May be it is better to do simple copy before
-	 * complex operation (mount), and in case of fail
-	 * just exit instead of doing mount and attempting
-	 * undo it if this copy fails?*/
-	if (data) {
-		int len = strlen(data);
-		cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
-		if (cifs_sb->mountdata == NULL) {
-			bdi_destroy(&cifs_sb->bdi);
-			kfree(sb->s_fs_info);
-			sb->s_fs_info = NULL;
-			return -ENOMEM;
-		}
-		strncpy(cifs_sb->mountdata, data, len + 1);
-		cifs_sb->mountdata[len] = '\0';
-	}
-#endif
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
+		sb->s_flags |= MS_POSIXACL;
 
-	rc = cifs_mount(sb, cifs_sb, data, devname);
+	if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
+		sb->s_maxbytes = MAX_LFS_FILESIZE;
+	else
+		sb->s_maxbytes = MAX_NON_LFS;
 
-	if (rc) {
-		if (!silent)
-			cERROR(1, "cifs_mount failed w/return code = %d", rc);
-		goto out_mount_failed;
-	}
+	/* BB FIXME fix time_gran to be larger for LANMAN sessions */
+	sb->s_time_gran = 100;
 
 	sb->s_magic = CIFS_MAGIC_NUMBER;
 	sb->s_op = &cifs_super_ops;
 	sb->s_bdi = &cifs_sb->bdi;
 	sb->s_blocksize = CIFS_MAX_MSGSIZE;
 	sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */
-	inode = cifs_root_iget(sb, ROOT_I);
+	inode = cifs_root_iget(sb);
 
 	if (IS_ERR(inode)) {
 		rc = PTR_ERR(inode);
@@ -184,12 +150,12 @@ cifs_read_super(struct super_block *sb, void *data,
 	else
 		sb->s_d_op = &cifs_dentry_ops;
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
+#ifdef CIFS_NFSD_EXPORT
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 		cFYI(1, "export ops supported");
 		sb->s_export_op = &cifs_export_ops;
 	}
-#endif /* EXPERIMENTAL */
+#endif /* CIFS_NFSD_EXPORT */
 
 	return 0;
 
@@ -198,49 +164,14 @@ out_no_root:
 	if (inode)
 		iput(inode);
 
-	cifs_umount(sb, cifs_sb);
-
-out_mount_failed:
-	if (cifs_sb) {
-#ifdef CONFIG_CIFS_DFS_UPCALL
-		if (cifs_sb->mountdata) {
-			kfree(cifs_sb->mountdata);
-			cifs_sb->mountdata = NULL;
-		}
-#endif
-		unload_nls(cifs_sb->local_nls);
-		bdi_destroy(&cifs_sb->bdi);
-		kfree(cifs_sb);
-	}
 	return rc;
 }
 
-static void
-cifs_put_super(struct super_block *sb)
+static void cifs_kill_sb(struct super_block *sb)
 {
-	int rc = 0;
-	struct cifs_sb_info *cifs_sb;
-
-	cFYI(1, "In cifs_put_super");
-	cifs_sb = CIFS_SB(sb);
-	if (cifs_sb == NULL) {
-		cFYI(1, "Empty cifs superblock info passed to unmount");
-		return;
-	}
-
-	rc = cifs_umount(sb, cifs_sb);
-	if (rc)
-		cERROR(1, "cifs_umount failed with return code %d", rc);
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	if (cifs_sb->mountdata) {
-		kfree(cifs_sb->mountdata);
-		cifs_sb->mountdata = NULL;
-	}
-#endif
-
-	unload_nls(cifs_sb->local_nls);
-	bdi_destroy(&cifs_sb->bdi);
-	kfree(cifs_sb);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	kill_anon_super(sb);
+	cifs_umount(cifs_sb);
 }
 
 static int
@@ -248,7 +179,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *sb = dentry->d_sb;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
-	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
 	int rc = -EOPNOTSUPP;
 	int xid;
 
@@ -297,9 +228,6 @@ static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
 {
 	struct cifs_sb_info *cifs_sb;
 
-	if (flags & IPERM_FLAG_RCU)
-		return -ECHILD;
-
 	cifs_sb = CIFS_SB(inode->i_sb);
 
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
@@ -392,6 +320,37 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
 	}
 }
 
+static void
+cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
+{
+	seq_printf(s, ",sec=");
+
+	switch (server->secType) {
+	case LANMAN:
+		seq_printf(s, "lanman");
+		break;
+	case NTLMv2:
+		seq_printf(s, "ntlmv2");
+		break;
+	case NTLM:
+		seq_printf(s, "ntlm");
+		break;
+	case Kerberos:
+		seq_printf(s, "krb5");
+		break;
+	case RawNTLMSSP:
+		seq_printf(s, "ntlmssp");
+		break;
+	default:
+		/* shouldn't ever happen */
+		seq_printf(s, "unknown");
+		break;
+	}
+
+	if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+		seq_printf(s, "i");
+}
+
 /*
  * cifs_show_options() is for displaying mount options in /proc/mounts.
  * Not all settable options are displayed but most of the important
@@ -401,10 +360,12 @@ static int
 cifs_show_options(struct seq_file *s, struct vfsmount *m)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
-	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
 	struct sockaddr *srcaddr;
 	srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
 
+	cifs_show_security(s, tcon->ses->server);
+
 	seq_printf(s, ",unc=%s", tcon->treeName);
 
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
@@ -455,14 +416,20 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
 		seq_printf(s, ",nocase");
 	if (tcon->retry)
 		seq_printf(s, ",hard");
-	if (cifs_sb->prepath)
-		seq_printf(s, ",prepath=%s", cifs_sb->prepath);
+	if (tcon->unix_ext)
+		seq_printf(s, ",unix");
+	else
+		seq_printf(s, ",nounix");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 		seq_printf(s, ",posixpaths");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
 		seq_printf(s, ",setuids");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
 		seq_printf(s, ",serverino");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		seq_printf(s, ",rwpidforward");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
+		seq_printf(s, ",forcemand");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
 		seq_printf(s, ",directio");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
@@ -495,7 +462,7 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
 static void cifs_umount_begin(struct super_block *sb)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
-	struct cifsTconInfo *tcon;
+	struct cifs_tcon *tcon;
 
 	if (cifs_sb == NULL)
 		return;
@@ -552,7 +519,6 @@ static int cifs_drop_inode(struct inode *inode)
 }
 
 static const struct super_operations cifs_super_ops = {
-	.put_super = cifs_put_super,
 	.statfs = cifs_statfs,
 	.alloc_inode = cifs_alloc_inode,
 	.destroy_inode = cifs_destroy_inode,
@@ -570,29 +536,151 @@ static const struct super_operations cifs_super_ops = {
 #endif
 };
 
+/*
+ * Get root dentry from superblock according to prefix path mount option.
+ * Return dentry with refcount + 1 on success and NULL otherwise.
+ */
+static struct dentry *
+cifs_get_root(struct smb_vol *vol, struct super_block *sb)
+{
+	struct dentry *dentry;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	char *full_path = NULL;
+	char *s, *p;
+	char sep;
+	int xid;
+
+	full_path = cifs_build_path_to_root(vol, cifs_sb,
+					    cifs_sb_master_tcon(cifs_sb));
+	if (full_path == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	cFYI(1, "Get root dentry for %s", full_path);
+
+	xid = GetXid();
+	sep = CIFS_DIR_SEP(cifs_sb);
+	dentry = dget(sb->s_root);
+	p = s = full_path;
+
+	do {
+		struct inode *dir = dentry->d_inode;
+		struct dentry *child;
+
+		/* skip separators */
+		while (*s == sep)
+			s++;
+		if (!*s)
+			break;
+		p = s++;
+		/* next separator */
+		while (*s && *s != sep)
+			s++;
+
+		mutex_lock(&dir->i_mutex);
+		child = lookup_one_len(p, dentry, s - p);
+		mutex_unlock(&dir->i_mutex);
+		dput(dentry);
+		dentry = child;
+	} while (!IS_ERR(dentry));
+	_FreeXid(xid);
+	kfree(full_path);
+	return dentry;
+}
+
+static int cifs_set_super(struct super_block *sb, void *data)
+{
+	struct cifs_mnt_data *mnt_data = data;
+	sb->s_fs_info = mnt_data->cifs_sb;
+	return set_anon_super(sb, NULL);
+}
+
 static struct dentry *
 cifs_do_mount(struct file_system_type *fs_type,
-	    int flags, const char *dev_name, void *data)
+	      int flags, const char *dev_name, void *data)
 {
 	int rc;
 	struct super_block *sb;
-
-	sb = sget(fs_type, NULL, set_anon_super, NULL);
+	struct cifs_sb_info *cifs_sb;
+	struct smb_vol *volume_info;
+	struct cifs_mnt_data mnt_data;
+	struct dentry *root;
 
 	cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
 
-	if (IS_ERR(sb))
-		return ERR_CAST(sb);
+	volume_info = cifs_get_volume_info((char *)data, dev_name);
+	if (IS_ERR(volume_info))
+		return ERR_CAST(volume_info);
+
+	cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
+	if (cifs_sb == NULL) {
+		root = ERR_PTR(-ENOMEM);
+		goto out_nls;
+	}
+
+	cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
+	if (cifs_sb->mountdata == NULL) {
+		root = ERR_PTR(-ENOMEM);
+		goto out_cifs_sb;
+	}
 
-	sb->s_flags = flags;
+	cifs_setup_cifs_sb(volume_info, cifs_sb);
 
-	rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
+	rc = cifs_mount(cifs_sb, volume_info);
 	if (rc) {
-		deactivate_locked_super(sb);
-		return ERR_PTR(rc);
+		if (!(flags & MS_SILENT))
+			cERROR(1, "cifs_mount failed w/return code = %d", rc);
+		root = ERR_PTR(rc);
+		goto out_mountdata;
+	}
+
+	mnt_data.vol = volume_info;
+	mnt_data.cifs_sb = cifs_sb;
+	mnt_data.flags = flags;
+
+	sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
+	if (IS_ERR(sb)) {
+		root = ERR_CAST(sb);
+		cifs_umount(cifs_sb);
+		goto out;
 	}
-	sb->s_flags |= MS_ACTIVE;
-	return dget(sb->s_root);
+
+	if (sb->s_root) {
+		cFYI(1, "Use existing superblock");
+		cifs_umount(cifs_sb);
+	} else {
+		sb->s_flags = flags;
+		/* BB should we make this contingent on mount parm? */
+		sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
+
+		rc = cifs_read_super(sb);
+		if (rc) {
+			root = ERR_PTR(rc);
+			goto out_super;
+		}
+
+		sb->s_flags |= MS_ACTIVE;
+	}
+
+	root = cifs_get_root(volume_info, sb);
+	if (IS_ERR(root))
+		goto out_super;
+
+	cFYI(1, "dentry root is: %p", root);
+	goto out;
+
+out_super:
+	deactivate_locked_super(sb);
+out:
+	cifs_cleanup_volume_info(volume_info);
+	return root;
+
+out_mountdata:
+	kfree(cifs_sb->mountdata);
+out_cifs_sb:
+	kfree(cifs_sb);
+out_nls:
+	unload_nls(volume_info->local_nls);
+	goto out;
 }
 
 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
@@ -618,16 +706,31 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
 {
 	/* origin == SEEK_END => we must revalidate the cached file length */
 	if (origin == SEEK_END) {
-		int retval;
-
-		/* some applications poll for the file length in this strange
-		   way so we must seek to end on non-oplocked files by
-		   setting the revalidate time to zero */
-		CIFS_I(file->f_path.dentry->d_inode)->time = 0;
-
-		retval = cifs_revalidate_file(file);
-		if (retval < 0)
-			return (loff_t)retval;
+		int rc;
+		struct inode *inode = file->f_path.dentry->d_inode;
+
+		/*
+		 * We need to be sure that all dirty pages are written and the
+		 * server has the newest file length.
+		 */
+		if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
+		    inode->i_mapping->nrpages != 0) {
+			rc = filemap_fdatawait(inode->i_mapping);
+			if (rc) {
+				mapping_set_error(inode->i_mapping, rc);
+				return rc;
+			}
+		}
+		/*
+		 * Some applications poll for the file length in this strange
+		 * way so we must seek to end on non-oplocked files by
+		 * setting the revalidate time to zero.
+		 */
+		CIFS_I(inode)->time = 0;
+
+		rc = cifs_revalidate_file_attr(file);
+		if (rc < 0)
+			return (loff_t)rc;
 	}
 	return generic_file_llseek_unlocked(file, offset, origin);
 }
@@ -666,7 +769,7 @@ struct file_system_type cifs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "cifs",
 	.mount = cifs_do_mount,
-	.kill_sb = kill_anon_super,
+	.kill_sb = cifs_kill_sb,
 	/*  .fs_flags */
 };
 const struct inode_operations cifs_dir_inode_ops = {
@@ -760,10 +863,11 @@ const struct file_operations cifs_file_strict_ops = {
 };
 
 const struct file_operations cifs_file_direct_ops = {
-	/* no aio, no readv -
-	   BB reevaluate whether they can be done with directio, no cache */
-	.read = cifs_user_read,
-	.write = cifs_user_write,
+	/* BB reevaluate whether they can be done with directio, no cache */
+	.read = do_sync_read,
+	.write = do_sync_write,
+	.aio_read = cifs_user_readv,
+	.aio_write = cifs_user_writev,
 	.open = cifs_open,
 	.release = cifs_close,
 	.lock = cifs_lock,
@@ -815,10 +919,11 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
 };
 
 const struct file_operations cifs_file_direct_nobrl_ops = {
-	/* no mmap, no aio, no readv -
-	   BB reevaluate whether they can be done with directio, no cache */
-	.read = cifs_user_read,
-	.write = cifs_user_write,
+	/* BB reevaluate whether they can be done with directio, no cache */
+	.read = do_sync_read,
+	.write = do_sync_write,
+	.aio_read = cifs_user_readv,
+	.aio_write = cifs_user_writev,
 	.open = cifs_open,
 	.release = cifs_close,
 	.fsync = cifs_fsync,
@@ -981,10 +1086,10 @@ init_cifs(void)
 	int rc = 0;
 	cifs_proc_init();
 	INIT_LIST_HEAD(&cifs_tcp_ses_list);
-#ifdef CONFIG_CIFS_EXPERIMENTAL
+#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
 	INIT_LIST_HEAD(&GlobalDnotifyReqList);
 	INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
-#endif
+#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
 /*
  *  Initialize Global counters
  */
@@ -1033,22 +1138,33 @@ init_cifs(void)
 	if (rc)
 		goto out_destroy_mids;
 
-	rc = register_filesystem(&cifs_fs_type);
-	if (rc)
-		goto out_destroy_request_bufs;
 #ifdef CONFIG_CIFS_UPCALL
 	rc = register_key_type(&cifs_spnego_key_type);
 	if (rc)
-		goto out_unregister_filesystem;
-#endif
+		goto out_destroy_request_bufs;
+#endif /* CONFIG_CIFS_UPCALL */
+
+#ifdef CONFIG_CIFS_ACL
+	rc = init_cifs_idmap();
+	if (rc)
+		goto out_register_key_type;
+#endif /* CONFIG_CIFS_ACL */
+
+	rc = register_filesystem(&cifs_fs_type);
+	if (rc)
+		goto out_init_cifs_idmap;
 
 	return 0;
 
-#ifdef CONFIG_CIFS_UPCALL
-out_unregister_filesystem:
-	unregister_filesystem(&cifs_fs_type);
+out_init_cifs_idmap:
+#ifdef CONFIG_CIFS_ACL
+	exit_cifs_idmap();
+out_register_key_type:
 #endif
+#ifdef CONFIG_CIFS_UPCALL
+	unregister_key_type(&cifs_spnego_key_type);
 out_destroy_request_bufs:
+#endif
 	cifs_destroy_request_bufs();
 out_destroy_mids:
 	cifs_destroy_mids();
@@ -1070,6 +1186,10 @@ exit_cifs(void)
 #ifdef CONFIG_CIFS_DFS_UPCALL
 	cifs_dfs_release_automount_timer();
 #endif
+#ifdef CONFIG_CIFS_ACL
+	cifs_destroy_idmaptrees();
+	exit_cifs_idmap();
+#endif
 #ifdef CONFIG_CIFS_UPCALL
 	unregister_key_type(&cifs_spnego_key_type);
 #endif