1 files changed, 98 insertions, 61 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2cb1a70214d7..75c4eaa79588 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -35,7 +35,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
-#include <linux/smp_lock.h>
+#include <net/ipv6.h>
 #include "cifsfs.h"
 #include "cifspdu.h"
 #define DECLARE_GLOBALS_HERE
@@ -45,8 +45,8 @@
 #include "cifs_fs_sb.h"
 #include <linux/mm.h>
 #include <linux/key-type.h>
-#include "dns_resolve.h"
 #include "cifs_spnego.h"
+#include "fscache.h"
 #define CIFS_MAGIC_NUMBER 0xFF534D42	/* the first four bytes of SMB PDUs */
 
 int cifsFYI = 0;
@@ -82,6 +82,24 @@ extern mempool_t *cifs_sm_req_poolp;
 extern mempool_t *cifs_req_poolp;
 extern mempool_t *cifs_mid_poolp;
 
+void
+cifs_sb_active(struct super_block *sb)
+{
+	struct cifs_sb_info *server = CIFS_SB(sb);
+
+	if (atomic_inc_return(&server->active) == 1)
+		atomic_inc(&sb->s_active);
+}
+
+void
+cifs_sb_deactive(struct super_block *sb)
+{
+	struct cifs_sb_info *server = CIFS_SB(sb);
+
+	if (atomic_dec_and_test(&server->active))
+		deactivate_super(sb);
+}
+
 static int
 cifs_read_super(struct super_block *sb, void *data,
 		const char *devname, int silent)
@@ -97,6 +115,9 @@ cifs_read_super(struct super_block *sb, void *data,
 	if (cifs_sb == NULL)
 		return -ENOMEM;
 
+	spin_lock_init(&cifs_sb->tlink_tree_lock);
+	INIT_RADIX_TREE(&cifs_sb->tlink_tree, GFP_KERNEL);
+
 	rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
 	if (rc) {
 		kfree(cifs_sb);
@@ -136,9 +157,6 @@ cifs_read_super(struct super_block *sb, void *data,
 	sb->s_magic = CIFS_MAGIC_NUMBER;
 	sb->s_op = &cifs_super_ops;
 	sb->s_bdi = &cifs_sb->bdi;
-/*	if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
-	    sb->s_blocksize =
-		cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
 	sb->s_blocksize = CIFS_MAX_MSGSIZE;
 	sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */
 	inode = cifs_root_iget(sb, ROOT_I);
@@ -200,8 +218,6 @@ cifs_put_super(struct super_block *sb)
 		return;
 	}
 
-	lock_kernel();
-
 	rc = cifs_umount(sb, cifs_sb);
 	if (rc)
 		cERROR(1, "cifs_umount failed with return code %d", rc);
@@ -215,8 +231,6 @@ cifs_put_super(struct super_block *sb)
 	unload_nls(cifs_sb->local_nls);
 	bdi_destroy(&cifs_sb->bdi);
 	kfree(cifs_sb);
-
-	unlock_kernel();
 }
 
 static int
@@ -224,7 +238,7 @@ 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->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
 	int rc = -EOPNOTSUPP;
 	int xid;
 
@@ -304,7 +318,6 @@ cifs_alloc_inode(struct super_block *sb)
 		return NULL;
 	cifs_inode->cifsAttrs = 0x20;	/* default */
 	cifs_inode->time = 0;
-	cifs_inode->write_behind_rc = 0;
 	/* Until the file is open and we have gotten oplock
 	info back from the server, can not assume caching of
 	file data or metadata */
@@ -329,6 +342,14 @@ cifs_destroy_inode(struct inode *inode)
 }
 
 static void
+cifs_evict_inode(struct inode *inode)
+{
+	truncate_inode_pages(&inode->i_data, 0);
+	end_writeback(inode);
+	cifs_fscache_release_inode_cookie(inode);
+}
+
+static void
 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
 {
 	seq_printf(s, ",addr=");
@@ -358,14 +379,36 @@ 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->tcon;
+	struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct sockaddr *srcaddr;
+	srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
 
 	seq_printf(s, ",unc=%s", tcon->treeName);
-	if (tcon->ses->userName)
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
+		seq_printf(s, ",multiuser");
+	else if (tcon->ses->userName)
 		seq_printf(s, ",username=%s", tcon->ses->userName);
+
 	if (tcon->ses->domainName)
 		seq_printf(s, ",domain=%s", tcon->ses->domainName);
 
+	if (srcaddr->sa_family != AF_UNSPEC) {
+		struct sockaddr_in *saddr4;
+		struct sockaddr_in6 *saddr6;
+		saddr4 = (struct sockaddr_in *)srcaddr;
+		saddr6 = (struct sockaddr_in6 *)srcaddr;
+		if (srcaddr->sa_family == AF_INET6)
+			seq_printf(s, ",srcaddr=%pI6c",
+				   &saddr6->sin6_addr);
+		else if (srcaddr->sa_family == AF_INET)
+			seq_printf(s, ",srcaddr=%pI4",
+				   &saddr4->sin_addr.s_addr);
+		else
+			seq_printf(s, ",srcaddr=BAD-AF:%i",
+				   (int)(srcaddr->sa_family));
+	}
+
 	seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 		seq_printf(s, ",forceuid");
@@ -414,6 +457,8 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
 		seq_printf(s, ",dynperm");
 	if (m->mnt_sb->s_flags & MS_POSIXACL)
 		seq_printf(s, ",acl");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
+		seq_printf(s, ",mfsymlinks");
 
 	seq_printf(s, ",rsize=%d", cifs_sb->rsize);
 	seq_printf(s, ",wsize=%d", cifs_sb->wsize);
@@ -429,20 +474,18 @@ static void cifs_umount_begin(struct super_block *sb)
 	if (cifs_sb == NULL)
 		return;
 
-	tcon = cifs_sb->tcon;
-	if (tcon == NULL)
-		return;
+	tcon = cifs_sb_master_tcon(cifs_sb);
 
-	read_lock(&cifs_tcp_ses_lock);
+	spin_lock(&cifs_tcp_ses_lock);
 	if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
 		/* we have other mounts to same share or we have
 		   already tried to force umount this and woken up
 		   all waiting network requests, nothing to do */
-		read_unlock(&cifs_tcp_ses_lock);
+		spin_unlock(&cifs_tcp_ses_lock);
 		return;
 	} else if (tcon->tc_count == 1)
 		tcon->tidStatus = CifsExiting;
-	read_unlock(&cifs_tcp_ses_lock);
+	spin_unlock(&cifs_tcp_ses_lock);
 
 	/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
 	/* cancel_notify_requests(tcon); */
@@ -473,14 +516,13 @@ static int cifs_remount(struct super_block *sb, int *flags, char *data)
 	return 0;
 }
 
-void cifs_drop_inode(struct inode *inode)
+static int cifs_drop_inode(struct inode *inode)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
-		return generic_drop_inode(inode);
-
-	return generic_delete_inode(inode);
+	/* no serverino => unconditional eviction */
+	return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
+		generic_drop_inode(inode);
 }
 
 static const struct super_operations cifs_super_ops = {
@@ -489,6 +531,7 @@ static const struct super_operations cifs_super_ops = {
 	.alloc_inode = cifs_alloc_inode,
 	.destroy_inode = cifs_destroy_inode,
 	.drop_inode	= cifs_drop_inode,
+	.evict_inode	= cifs_evict_inode,
 /*	.delete_inode	= cifs_delete_inode,  */  /* Do not need above
 	function unless later we add lazy close of inodes or unless the
 	kernel forgets to call us with the same number of releases (closes)
@@ -501,28 +544,29 @@ static const struct super_operations cifs_super_ops = {
 #endif
 };
 
-static int
-cifs_get_sb(struct file_system_type *fs_type,
-	    int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *
+cifs_do_mount(struct file_system_type *fs_type,
+	    int flags, const char *dev_name, void *data)
 {
 	int rc;
-	struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+	struct super_block *sb;
+
+	sb = sget(fs_type, NULL, set_anon_super, NULL);
 
 	cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
 
 	if (IS_ERR(sb))
-		return PTR_ERR(sb);
+		return ERR_CAST(sb);
 
 	sb->s_flags = flags;
 
 	rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
 	if (rc) {
 		deactivate_locked_super(sb);
-		return rc;
+		return ERR_PTR(rc);
 	}
 	sb->s_flags |= MS_ACTIVE;
-	simple_set_mnt(mnt, sb);
-	return 0;
+	return dget(sb->s_root);
 }
 
 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
@@ -557,9 +601,10 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
 
 static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 {
-	/* note that this is called by vfs setlease with the BKL held
-	   although I doubt that BKL is needed here in cifs */
+	/* note that this is called by vfs setlease with lock_flocks held
+	   to protect *lease from going away */
 	struct inode *inode = file->f_path.dentry->d_inode;
+	struct cifsFileInfo *cfile = file->private_data;
 
 	if (!(S_ISREG(inode->i_mode)))
 		return -EINVAL;
@@ -570,8 +615,8 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 	    ((arg == F_WRLCK) &&
 		(CIFS_I(inode)->clientCanCacheAll)))
 		return generic_setlease(file, arg, lease);
-	else if (CIFS_SB(inode->i_sb)->tcon->local_lease &&
-			!CIFS_I(inode)->clientCanCacheRead)
+	else if (tlink_tcon(cfile->tlink)->local_lease &&
+		 !CIFS_I(inode)->clientCanCacheRead)
 		/* If the server claims to support oplock on this
 		   file, then we still need to check oplock even
 		   if the local_lease mount option is set, but there
@@ -587,7 +632,7 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
 struct file_system_type cifs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "cifs",
-	.get_sb = cifs_get_sb,
+	.mount = cifs_do_mount,
 	.kill_sb = kill_anon_super,
 	/*  .fs_flags */
 };
@@ -890,8 +935,8 @@ init_cifs(void)
 	GlobalTotalActiveXid = 0;
 	GlobalMaxActiveXid = 0;
 	memset(Local_System_Name, 0, 15);
-	rwlock_init(&GlobalSMBSeslock);
-	rwlock_init(&cifs_tcp_ses_lock);
+	spin_lock_init(&cifs_tcp_ses_lock);
+	spin_lock_init(&cifs_file_list_lock);
 	spin_lock_init(&GlobalMid_Lock);
 
 	if (cifs_max_pending < 2) {
@@ -902,10 +947,14 @@ init_cifs(void)
 		cFYI(1, "cifs_max_pending set to max of 256");
 	}
 
-	rc = cifs_init_inodecache();
+	rc = cifs_fscache_register();
 	if (rc)
 		goto out_clean_proc;
 
+	rc = cifs_init_inodecache();
+	if (rc)
+		goto out_unreg_fscache;
+
 	rc = cifs_init_mids();
 	if (rc)
 		goto out_destroy_inodecache;
@@ -922,34 +971,22 @@ init_cifs(void)
 	if (rc)
 		goto out_unregister_filesystem;
 #endif
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	rc = cifs_init_dns_resolver();
-	if (rc)
-		goto out_unregister_key_type;
-#endif
-	rc = slow_work_register_user(THIS_MODULE);
-	if (rc)
-		goto out_unregister_resolver_key;
 
 	return 0;
 
- out_unregister_resolver_key:
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	cifs_exit_dns_resolver();
- out_unregister_key_type:
-#endif
 #ifdef CONFIG_CIFS_UPCALL
-	unregister_key_type(&cifs_spnego_key_type);
- out_unregister_filesystem:
-#endif
+out_unregister_filesystem:
 	unregister_filesystem(&cifs_fs_type);
- out_destroy_request_bufs:
+#endif
+out_destroy_request_bufs:
 	cifs_destroy_request_bufs();
- out_destroy_mids:
+out_destroy_mids:
 	cifs_destroy_mids();
- out_destroy_inodecache:
+out_destroy_inodecache:
 	cifs_destroy_inodecache();
- out_clean_proc:
+out_unreg_fscache:
+	cifs_fscache_unregister();
+out_clean_proc:
 	cifs_proc_clean();
 	return rc;
 }
@@ -959,9 +996,9 @@ exit_cifs(void)
 {
 	cFYI(DBG2, "exit_cifs");
 	cifs_proc_clean();
+	cifs_fscache_unregister();
 #ifdef CONFIG_CIFS_DFS_UPCALL
 	cifs_dfs_release_automount_timer();
-	cifs_exit_dns_resolver();
 #endif
 #ifdef CONFIG_CIFS_UPCALL
 	unregister_key_type(&cifs_spnego_key_type);