From e631ddba588783edd521c5a89f7b2902772fb691 Mon Sep 17 00:00:00 2001 From: Ferenc Havasi Date: Wed, 7 Sep 2005 09:35:26 +0100 Subject: [JFFS2] Add erase block summary support (mount time improvement) The goal of summary is to speed up the mount time. Erase block summary (EBS) stores summary information at the end of every (closed) erase block. It is no longer necessary to scan all nodes separetly (and read all pages of them) just read this "small" summary, where every information is stored which is needed at mount time. This summary information is stored in a JFFS2_FEATURE_RWCOMPAT_DELETE. During the mount process if there is no summary info the orignal scan process will be executed. EBS works with NAND and NOR flashes, too. There is a user space tool called sumtool to generate this summary information for a JFFS2 image. Signed-off-by: Ferenc Havasi Signed-off-by: Thomas Gleixner --- fs/jffs2/dir.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) (limited to 'fs/jffs2/dir.c') diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index 0fd15aaf2458..19bea0f95ac1 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: dir.c,v 1.88 2005/08/17 13:46:22 dedekind Exp $ + * $Id: dir.c,v 1.89 2005/09/07 08:34:54 havasi Exp $ * */ @@ -310,7 +310,8 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char * Just the node will do for now, though */ namelen = dentry->d_name.len; - ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &phys_ofs, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); if (ret) { jffs2_free_raw_inode(ri); @@ -370,7 +371,8 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char up(&f->sem); jffs2_complete_reservation(c); - ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); if (ret) { /* Eep. */ jffs2_clear_inode(inode); @@ -455,7 +457,8 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) * Just the node will do for now, though */ namelen = dentry->d_name.len; - ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL, + JFFS2_SUMMARY_INODE_SIZE); if (ret) { jffs2_free_raw_inode(ri); @@ -498,7 +501,8 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) up(&f->sem); jffs2_complete_reservation(c); - ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); if (ret) { /* Eep. */ jffs2_clear_inode(inode); @@ -607,7 +611,8 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de * Just the node will do for now, though */ namelen = dentry->d_name.len; - ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); if (ret) { jffs2_free_raw_inode(ri); @@ -652,7 +657,8 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de up(&f->sem); jffs2_complete_reservation(c); - ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); + ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); if (ret) { /* Eep. */ jffs2_clear_inode(inode); -- cgit v1.2.3