Merge branch 'master'

80 files changed, 1044 insertions, 631 deletions

diff --git a/fs/9p/conv.c b/fs/9p/conv.c
index 32a9f99154e..bf1f1006796 100644
--- a/fs/9p/conv.c
+++ b/fs/9p/conv.c
@@ -116,13 +116,19 @@ static void buf_put_int64(struct cbuf *buf, u64 val)
 	}
 }
 
-static void buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
+static char *buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
 {
+	char *ret;
+
+	ret = NULL;
 	if (buf_check_size(buf, slen + 2)) {
 		buf_put_int16(buf, slen);
+		ret = buf->p;
 		memcpy(buf->p, s, slen);
 		buf->p += slen;
 	}
+
+	return ret;
 }
 
 static inline void buf_put_string(struct cbuf *buf, const char *s)
@@ -430,15 +436,19 @@ static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
 static void
 v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
 {
-	if (data) {
-		str->len = strlen(data);
-		str->str = bufp->p;
-	} else {
-		str->len = 0;
-		str->str = NULL;
-	}
+	int len;
+	char *s;
+
+	if (data)
+		len = strlen(data);
+	else
+		len = 0;
 
-	buf_put_stringn(bufp, data, str->len);
+	s = buf_put_stringn(bufp, data, len);
+	if (str) {
+		str->len = len;
+		str->str = s;
+	}
 }
 
 static int
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
index 945cb368d45..ea1134eb47c 100644
--- a/fs/9p/mux.c
+++ b/fs/9p/mux.c
@@ -471,10 +471,13 @@ static void v9fs_write_work(void *a)
 		}
 
 		spin_lock(&m->lock);
-		req =
-		    list_entry(m->unsent_req_list.next, struct v9fs_req,
+again:
+		req = list_entry(m->unsent_req_list.next, struct v9fs_req,
 			       req_list);
 		list_move_tail(&req->req_list, &m->req_list);
+		if (req->err == ERREQFLUSH)
+			goto again;
+
 		m->wbuf = req->tcall->sdata;
 		m->wsize = req->tcall->size;
 		m->wpos = 0;
@@ -525,7 +528,7 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
 	struct v9fs_str *ename;
 
 	tag = req->tag;
-	if (req->rcall->id == RERROR && !req->err) {
+	if (!req->err && req->rcall->id == RERROR) {
 		ecode = req->rcall->params.rerror.errno;
 		ename = &req->rcall->params.rerror.error;
 
@@ -551,7 +554,10 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
 			req->err = -EIO;
 	}
 
-	if (req->cb && req->err != ERREQFLUSH) {
+	if (req->err == ERREQFLUSH)
+		return;
+
+	if (req->cb) {
 		dprintk(DEBUG_MUX, "calling callback tcall %p rcall %p\n",
 			req->tcall, req->rcall);
 
@@ -812,6 +818,7 @@ v9fs_mux_rpc_cb(void *a, struct v9fs_fcall *tc, struct v9fs_fcall *rc, int err)
 	struct v9fs_mux_rpc *r;
 
 	if (err == ERREQFLUSH) {
+		kfree(rc);
 		dprintk(DEBUG_MUX, "err req flush\n");
 		return;
 	}
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 91f552454c7..63e5b0398e8 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -886,8 +886,8 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
 	}
 
 	/* copy extension buffer into buffer */
-	if (fcall->params.rstat.stat.extension.len < buflen)
-		buflen = fcall->params.rstat.stat.extension.len;
+	if (fcall->params.rstat.stat.extension.len+1 < buflen)
+		buflen = fcall->params.rstat.stat.extension.len + 1;
 
 	memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
 	buffer[buflen-1] = 0;
@@ -951,7 +951,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	if (!link)
 		link = ERR_PTR(-ENOMEM);
 	else {
-		len = v9fs_readlink(dentry, link, strlen(link));
+		len = v9fs_readlink(dentry, link, PATH_MAX);
 
 		if (len < 0) {
 			__putname(link);
diff --git a/fs/Kconfig b/fs/Kconfig
index ef78e3a42d3..e9749b0eecd 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -883,8 +883,6 @@ config CONFIGFS_FS
 	  Both sysfs and configfs can and should exist together on the
 	  same system. One is not a replacement for the other.
 
-	  If unsure, say N.
-
 endmenu
 
 menu "Miscellaneous filesystems"
@@ -1327,7 +1325,7 @@ config UFS_FS
 
 config UFS_FS_WRITE
 	bool "UFS file system write support (DANGEROUS)"
-	depends on UFS_FS && EXPERIMENTAL
+	depends on UFS_FS && EXPERIMENTAL && BROKEN
 	help
 	  Say Y here if you want to try writing to UFS partitions. This is
 	  experimental, so you should back up your UFS partitions beforehand.
diff --git a/fs/bio.c b/fs/bio.c
index bbc442b8c86..1f3bb501c26 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -411,6 +411,7 @@ static int __bio_add_page(request_queue_t *q, struct bio *bio, struct page
 
 /**
  *	bio_add_pc_page	-	attempt to add page to bio
+ *	@q: the target queue
  *	@bio: destination bio
  *	@page: page to add
  *	@len: vec entry length
diff --git a/fs/buffer.c b/fs/buffer.c
index 3dc712f29d2..62cfd17dc5f 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1022,6 +1022,7 @@ try_again:
 
 		bh->b_state = 0;
 		atomic_set(&bh->b_count, 0);
+		bh->b_private = NULL;
 		bh->b_size = size;
 
 		/* Link the buffer to its page */
@@ -2866,22 +2867,22 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
 		else if (test_set_buffer_locked(bh))
 			continue;
 
-		get_bh(bh);
 		if (rw == WRITE || rw == SWRITE) {
 			if (test_clear_buffer_dirty(bh)) {
 				bh->b_end_io = end_buffer_write_sync;
+				get_bh(bh);
 				submit_bh(WRITE, bh);
 				continue;
 			}
 		} else {
 			if (!buffer_uptodate(bh)) {
 				bh->b_end_io = end_buffer_read_sync;
+				get_bh(bh);
 				submit_bh(rw, bh);
 				continue;
 			}
 		}
 		unlock_buffer(bh);
-		put_bh(bh);
 	}
 }
 
@@ -3050,6 +3051,66 @@ asmlinkage long sys_bdflush(int func, long data)
 }
 
 /*
+ * Migration function for pages with buffers. This function can only be used
+ * if the underlying filesystem guarantees that no other references to "page"
+ * exist.
+ */
+#ifdef CONFIG_MIGRATION
+int buffer_migrate_page(struct page *newpage, struct page *page)
+{
+	struct address_space *mapping = page->mapping;
+	struct buffer_head *bh, *head;
+
+	if (!mapping)
+		return -EAGAIN;
+
+	if (!page_has_buffers(page))
+		return migrate_page(newpage, page);
+
+	head = page_buffers(page);
+
+	if (migrate_page_remove_references(newpage, page, 3))
+		return -EAGAIN;
+
+	bh = head;
+	do {
+		get_bh(bh);
+		lock_buffer(bh);
+		bh = bh->b_this_page;
+
+	} while (bh != head);
+
+	ClearPagePrivate(page);
+	set_page_private(newpage, page_private(page));
+	set_page_private(page, 0);
+	put_page(page);
+	get_page(newpage);
+
+	bh = head;
+	do {
+		set_bh_page(bh, newpage, bh_offset(bh));
+		bh = bh->b_this_page;
+
+	} while (bh != head);
+
+	SetPagePrivate(newpage);
+
+	migrate_page_copy(newpage, page);
+
+	bh = head;
+	do {
+		unlock_buffer(bh);
+ 		put_bh(bh);
+		bh = bh->b_this_page;
+
+	} while (bh != head);
+
+	return 0;
+}
+EXPORT_SYMBOL(buffer_migrate_page);
+#endif
+
+/*
  * Buffer-head allocation
  */
 static kmem_cache_t *bh_cachep;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 88f60aa5205..e488603fb1e 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1785,7 +1785,16 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 		} else if(volume_info.wsize)
 			cifs_sb->wsize = volume_info.wsize;
 		else
-			cifs_sb->wsize = CIFSMaxBufSize; /* default */
+			cifs_sb->wsize = 
+				min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
+					127*1024);
+			/* old default of CIFSMaxBufSize was too small now
+			   that SMB Write2 can send multiple pages in kvec.   
+			   RFC1001 does not describe what happens when frame
+			   bigger than 128K is sent so use that as max in
+			   conjunction with 52K kvec constraint on arch with 4K
+			   page size  */
+
 		if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
 			cifs_sb->rsize = PAGE_CACHE_SIZE; 
 			/* Windows ME does this */
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 77c990f0cb9..d17c97d07c8 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1190,7 +1190,6 @@ retry:
 					/* BB what if continued retry is
 					   requested via mount flags? */
 					set_bit(AS_EIO, &mapping->flags);
-					SetPageError(page);
 				} else {
 					cifs_stats_bytes_written(cifs_sb->tcon,
 								 bytes_written);
@@ -1198,6 +1197,13 @@ retry:
 			}
 			for (i = 0; i < n_iov; i++) {
 				page = pvec.pages[first + i];
+				/* Should we also set page error on
+				success rc but too little data written? */
+				/* BB investigate retry logic on temporary
+				server crash cases and how recovery works
+				when page marked as error */ 
+				if(rc)
+					SetPageError(page);
 				kunmap(page);
 				unlock_page(page);
 				page_cache_release(page);
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 7b98792150e..b12cb8a7da7 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -498,7 +498,6 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 			else
 				*pRespBufType = CIFS_SMALL_BUFFER;
 			iov[0].iov_len = receive_len + 4;
-			iov[1].iov_len = 0;
 
 			dump_smb(midQ->resp_buf, 80);
 			/* convert the length into a more usable form */
diff --git a/fs/compat.c b/fs/compat.c
index ff0bafcff72..70c5af4cc27 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -73,17 +73,17 @@ asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __
 	return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
 }
 
-asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, struct compat_timeval __user *t)
+asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
 {
 	struct timeval tv[2];
 
-	if (t) { 
+	if (t) {
 		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
 		    get_user(tv[0].tv_usec, &t[0].tv_usec) ||
 		    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
 		    get_user(tv[1].tv_usec, &t[1].tv_usec))
-			return -EFAULT; 
-	} 
+			return -EFAULT;
+	}
 	return do_utimes(dfd, filename, t ? tv : NULL);
 }
 
@@ -114,7 +114,7 @@ asmlinkage long compat_sys_newlstat(char __user * filename,
 	return error;
 }
 
-asmlinkage long compat_sys_newfstatat(int dfd, char __user *filename,
+asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
 		struct compat_stat __user *statbuf, int flag)
 {
 	struct kstat stat;
@@ -1326,7 +1326,7 @@ compat_sys_open(const char __user *filename, int flags, int mode)
  * O_LARGEFILE flag.
  */
 asmlinkage long
-compat_sys_openat(int dfd, const char __user *filename, int flags, int mode)
+compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
 {
 	return do_sys_open(dfd, filename, flags, mode);
 }
@@ -1781,7 +1781,7 @@ asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
 {
 	compat_sigset_t ss32;
 	sigset_t ksigmask, sigsaved;
-	long timeout = MAX_SCHEDULE_TIMEOUT;
+	s64 timeout = MAX_SCHEDULE_TIMEOUT;
 	struct compat_timespec ts;
 	int ret;
 
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index 8899d9c5f6b..f70e46951b3 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -36,6 +36,7 @@ struct configfs_dirent {
 	int			s_type;
 	umode_t			s_mode;
 	struct dentry		* s_dentry;
+	struct iattr		* s_iattr;
 };
 
 #define CONFIGFS_ROOT		0x0001
@@ -48,10 +49,11 @@ struct configfs_dirent {
 #define CONFIGFS_NOT_PINNED	(CONFIGFS_ITEM_ATTR)
 
 extern struct vfsmount * configfs_mount;
+extern kmem_cache_t *configfs_dir_cachep;
 
 extern int configfs_is_root(struct config_item *item);
 
-extern struct inode * configfs_new_inode(mode_t mode);
+extern struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent *);
 extern int configfs_create(struct dentry *, int mode, int (*init)(struct inode *));
 
 extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
@@ -63,6 +65,7 @@ extern void configfs_hash_and_remove(struct dentry * dir, const char * name);
 
 extern const unsigned char * configfs_get_name(struct configfs_dirent *sd);
 extern void configfs_drop_dentry(struct configfs_dirent *sd, struct dentry *parent);
+extern int configfs_setattr(struct dentry *dentry, struct iattr *iattr);
 
 extern int configfs_pin_fs(void);
 extern void configfs_release_fs(void);
@@ -120,8 +123,10 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
 
 static inline void release_configfs_dirent(struct configfs_dirent * sd)
 {
-	if (!(sd->s_type & CONFIGFS_ROOT))
-		kfree(sd);
+	if (!(sd->s_type & CONFIGFS_ROOT)) {
+		kfree(sd->s_iattr);
+		kmem_cache_free(configfs_dir_cachep, sd);
+	}
 }
 
 static inline struct configfs_dirent * configfs_get(struct configfs_dirent * sd)
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index b668ec61527..ca60e3abef4 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -72,7 +72,7 @@ static struct configfs_dirent *configfs_new_dirent(struct configfs_dirent * pare
 {
 	struct configfs_dirent * sd;
 
-	sd = kmalloc(sizeof(*sd), GFP_KERNEL);
+	sd = kmem_cache_alloc(configfs_dir_cachep, GFP_KERNEL);
 	if (!sd)
 		return NULL;
 
@@ -136,13 +136,19 @@ static int create_dir(struct config_item * k, struct dentry * p,
 	int error;
 	umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
 
-	error = configfs_create(d, mode, init_dir);
+	error = configfs_make_dirent(p->d_fsdata, d, k, mode,
+				     CONFIGFS_DIR);
 	if (!error) {
-		error = configfs_make_dirent(p->d_fsdata, d, k, mode,
-					   CONFIGFS_DIR);
+		error = configfs_create(d, mode, init_dir);
 		if (!error) {
 			p->d_inode->i_nlink++;
 			(d)->d_op = &configfs_dentry_ops;
+		} else {
+			struct configfs_dirent *sd = d->d_fsdata;
+			if (sd) {
+				list_del_init(&sd->s_sibling);
+				configfs_put(sd);
+			}
 		}
 	}
 	return error;
@@ -182,12 +188,19 @@ int configfs_create_link(struct configfs_symlink *sl,
 	int err = 0;
 	umode_t mode = S_IFLNK | S_IRWXUGO;
 
-	err = configfs_create(dentry, mode, init_symlink);
+	err = configfs_make_dirent(parent->d_fsdata, dentry, sl, mode,
+				   CONFIGFS_ITEM_LINK);
 	if (!err) {
-		err = configfs_make_dirent(parent->d_fsdata, dentry, sl,
-					 mode, CONFIGFS_ITEM_LINK);
+		err = configfs_create(dentry, mode, init_symlink);
 		if (!err)
 			dentry->d_op = &configfs_dentry_ops;
+		else {
+			struct configfs_dirent *sd = dentry->d_fsdata;
+			if (sd) {
+				list_del_init(&sd->s_sibling);
+				configfs_put(sd);
+			}
+		}
 	}
 	return err;
 }