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-rw-r--r--fs/jffs2/fs.c37
1 files changed, 28 insertions, 9 deletions
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 459d39d..e896e67 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -2,6 +2,7 @@
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright © 2001-2007 Red Hat, Inc.
+ * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
*
* Created by David Woodhouse <dwmw2@infradead.org>
*
@@ -20,7 +21,6 @@
#include <linux/vmalloc.h>
#include <linux/vfs.h>
#include <linux/crc32.h>
-#include <linux/smp_lock.h>
#include "nodelist.h"
static int jffs2_flash_setup(struct jffs2_sb_info *c);
@@ -169,13 +169,13 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
- /* We have to do the simple_setsize() without f->sem held, since
+ /* We have to do the truncate_setsize() without f->sem held, since
some pages may be locked and waiting for it in readpage().
We are protected from a simultaneous write() extending i_size
back past iattr->ia_size, because do_truncate() holds the
generic inode semaphore. */
if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) {
- simple_setsize(inode, iattr->ia_size);
+ truncate_setsize(inode, iattr->ia_size);
inode->i_blocks = (inode->i_size + 511) >> 9;
}
@@ -225,7 +225,7 @@ int jffs2_statfs(struct dentry *dentry, struct kstatfs *buf)
}
-void jffs2_clear_inode (struct inode *inode)
+void jffs2_evict_inode (struct inode *inode)
{
/* We can forget about this inode for now - drop all
* the nodelists associated with it, etc.
@@ -233,7 +233,9 @@ void jffs2_clear_inode (struct inode *inode)
struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
- D1(printk(KERN_DEBUG "jffs2_clear_inode(): ino #%lu mode %o\n", inode->i_ino, inode->i_mode));
+ D1(printk(KERN_DEBUG "jffs2_evict_inode(): ino #%lu mode %o\n", inode->i_ino, inode->i_mode));
+ truncate_inode_pages(&inode->i_data, 0);
+ end_writeback(inode);
jffs2_do_clear_inode(c, f);
}
@@ -388,7 +390,6 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
This also catches the case where it was stopped and this
is just a remount to restart it.
Flush the writebuffer, if neccecary, else we loose it */
- lock_kernel();
if (!(sb->s_flags & MS_RDONLY)) {
jffs2_stop_garbage_collect_thread(c);
mutex_lock(&c->alloc_sem);
@@ -400,8 +401,6 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
jffs2_start_garbage_collect_thread(c);
*flags |= MS_NOATIME;
-
- unlock_kernel();
return 0;
}
@@ -475,6 +474,25 @@ struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_i
return inode;
}
+static int calculate_inocache_hashsize(uint32_t flash_size)
+{
+ /*
+ * Pick a inocache hash size based on the size of the medium.
+ * Count how many megabytes we're dealing with, apply a hashsize twice
+ * that size, but rounding down to the usual big powers of 2. And keep
+ * to sensible bounds.
+ */
+
+ int size_mb = flash_size / 1024 / 1024;
+ int hashsize = (size_mb * 2) & ~0x3f;
+
+ if (hashsize < INOCACHE_HASHSIZE_MIN)
+ return INOCACHE_HASHSIZE_MIN;
+ if (hashsize > INOCACHE_HASHSIZE_MAX)
+ return INOCACHE_HASHSIZE_MAX;
+
+ return hashsize;
+}
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
{
@@ -521,7 +539,8 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
if (ret)
return ret;
- c->inocache_list = kcalloc(INOCACHE_HASHSIZE, sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
+ c->inocache_hashsize = calculate_inocache_hashsize(c->flash_size);
+ c->inocache_list = kcalloc(c->inocache_hashsize, sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
if (!c->inocache_list) {
ret = -ENOMEM;
goto out_wbuf;
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