From 3be36675d41a30ed3b192f92684f1417aa0f8bfe Mon Sep 17 00:00:00 2001 From: Andrew Victor Date: Wed, 9 Feb 2005 09:09:05 +0000 Subject: [JFFS2] Core changes required to support JFFS2-on-Dataflash devices. DataFlash page-sizes are not a power of two (they're multiples of 528 bytes). There are a few places in JFFS2 code where sector_size is used as a bitmask. A new macro (SECTOR_ADDR) was defined to calculate these sector addresses. For non-DataFlash devices, the original (faster) bitmask operation is still used. In scan.c, the EMPTY_SCAN_SIZE was a constant of 1024. Since this could be larger than the sector size of the DataFlash, this is now basically set to MIN(sector_size, 1024). Addition of a jffs2_is_writebuffered() macro. Signed-off-by: Andrew Victor Signed-off-by: Thomas Gleixner --- fs/jffs2/gc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'fs/jffs2/gc.c') diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 87ec74ff5930..61ae001eced5 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: gc.c,v 1.144 2004/12/21 11:18:50 dwmw2 Exp $ + * $Id: gc.c,v 1.145 2005/02/09 09:09:01 pavlov Exp $ * */ @@ -816,8 +816,7 @@ static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct /* Doesn't matter if there's one in the same erase block. We're going to delete it too at the same time. */ - if ((raw->flash_offset & ~(c->sector_size-1)) == - (fd->raw->flash_offset & ~(c->sector_size-1))) + if (SECTOR_ADDR(raw->flash_offset) == SECTOR_ADDR(fd->raw->flash_offset)) continue; D1(printk(KERN_DEBUG "Check potential deletion dirent at %08x\n", ref_offset(raw))); -- cgit From a42163d7c331c2532551f675d6616a00e1e87fe9 Mon Sep 17 00:00:00 2001 From: "Artem B. Bityuckiy" Date: Sun, 20 Mar 2005 17:45:29 +0000 Subject: [JFFS2] Improve garbage collector block selection Make sure the erase_pending_wbuf_list's blocks are taken into account when picking the block to GC. Signed-off-by: Artem B. Bityuckiy Signed-off-by: Thomas Gleixner --- fs/jffs2/gc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'fs/jffs2/gc.c') diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 61ae001eced5..44fa7379098f 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: gc.c,v 1.145 2005/02/09 09:09:01 pavlov Exp $ + * $Id: gc.c,v 1.146 2005/03/20 17:45:25 dedekind Exp $ * */ @@ -50,6 +50,7 @@ static struct jffs2_eraseblock *jffs2_find_gc_block(struct jffs2_sb_info *c) put the clever wear-levelling algorithms. Eventually. */ /* We possibly want to favour the dirtier blocks more when the number of free blocks is low. */ +again: if (!list_empty(&c->bad_used_list) && c->nr_free_blocks > c->resv_blocks_gcbad) { D1(printk(KERN_DEBUG "Picking block from bad_used_list to GC next\n")); nextlist = &c->bad_used_list; @@ -79,6 +80,11 @@ static struct jffs2_eraseblock *jffs2_find_gc_block(struct jffs2_sb_info *c) D1(printk(KERN_DEBUG "Picking block from erasable_list to GC next (clean_list and {very_,}dirty_list were empty)\n")); nextlist = &c->erasable_list; + } else if (!list_empty(&c->erasable_pending_wbuf_list)) { + /* There are blocks are wating for the wbuf sync */ + D1(printk(KERN_DEBUG "Synching wbuf in order to reuse erasable_pending_wbuf_list blocks\n")); + jffs2_flush_wbuf_pad(c); + goto again; } else { /* Eep. All were empty */ D1(printk(KERN_NOTICE "jffs2: No clean, dirty _or_ erasable blocks to GC from! Where are they all?\n")); -- cgit From 3cceb9f6cf433545b607451e5de7af2cd6cec0b5 Mon Sep 17 00:00:00 2001 From: "Artem B. Bityuckiy" Date: Sun, 20 Mar 2005 21:43:26 +0000 Subject: [JFFS2] Prevent deadlock when flushing write buffer Signed-off-by: Artem B. Bityuckiy Signed-off-by: Thomas Gleixner --- fs/jffs2/gc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs/jffs2/gc.c') diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 44fa7379098f..694bc90ad779 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: gc.c,v 1.146 2005/03/20 17:45:25 dedekind Exp $ + * $Id: gc.c,v 1.147 2005/03/20 21:43:22 dedekind Exp $ * */ @@ -83,7 +83,9 @@ again: } else if (!list_empty(&c->erasable_pending_wbuf_list)) { /* There are blocks are wating for the wbuf sync */ D1(printk(KERN_DEBUG "Synching wbuf in order to reuse erasable_pending_wbuf_list blocks\n")); + spin_unlock(&c->erase_completion_lock); jffs2_flush_wbuf_pad(c); + spin_lock(&c->erase_completion_lock); goto again; } else { /* Eep. All were empty */ -- cgit From 8557fd51c22e4c2109f062decd19de439061ceae Mon Sep 17 00:00:00 2001 From: "Artem B. Bityuckiy" Date: Sat, 9 Apr 2005 11:47:03 +0100 Subject: [JFFS2] Fix race in garbage collector Fix the race problem described here: http://lists.infradead.org/pipermail/linux-mtd/2005-April/012361.html Signed-off-by: Artem B. Bityuckiy Signed-off-by: Thomas Gleixner --- fs/jffs2/gc.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) (limited to 'fs/jffs2/gc.c') diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 694bc90ad779..7086cd634503 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: gc.c,v 1.147 2005/03/20 21:43:22 dedekind Exp $ + * $Id: gc.c,v 1.148 2005/04/09 10:47:00 dedekind Exp $ * */ @@ -669,9 +669,10 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_ { struct jffs2_full_dnode *new_fn; struct jffs2_raw_inode ri; + struct jffs2_node_frag *last_frag; jint16_t dev; char *mdata = NULL, mdatalen = 0; - uint32_t alloclen, phys_ofs; + uint32_t alloclen, phys_ofs, ilen; int ret; if (S_ISBLK(JFFS2_F_I_MODE(f)) || @@ -707,6 +708,14 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_ goto out; } + last_frag = frag_last(&f->fragtree); + if (last_frag) + /* Fetch the inode length from the fragtree rather then + * from i_size since i_size may have not been updated yet */ + ilen = last_frag->ofs + last_frag->size; + else + ilen = JFFS2_F_I_SIZE(f); + memset(&ri, 0, sizeof(ri)); ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); ri.nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); @@ -718,7 +727,7 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_ ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f)); ri.uid = cpu_to_je16(JFFS2_F_I_UID(f)); ri.gid = cpu_to_je16(JFFS2_F_I_GID(f)); - ri.isize = cpu_to_je32(JFFS2_F_I_SIZE(f)); + ri.isize = cpu_to_je32(ilen); ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f)); ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f)); ri.mtime = cpu_to_je32(JFFS2_F_I_MTIME(f)); @@ -898,7 +907,7 @@ static int jffs2_garbage_collect_hole(struct jffs2_sb_info *c, struct jffs2_eras struct jffs2_raw_inode ri; struct jffs2_node_frag *frag; struct jffs2_full_dnode *new_fn; - uint32_t alloclen, phys_ofs; + uint32_t alloclen, phys_ofs, ilen; int ret; D1(printk(KERN_DEBUG "Writing replacement hole node for ino #%u from offset 0x%x to 0x%x\n", @@ -958,10 +967,19 @@ static int jffs2_garbage_collect_hole(struct jffs2_sb_info *c, struct jffs2_eras ri.csize = cpu_to_je32(0); ri.compr = JFFS2_COMPR_ZERO; } + + frag = frag_last(&f->fragtree); + if (frag) + /* Fetch the inode length from the fragtree rather then + * from i_size since i_size may have not been updated yet */ + ilen = frag->ofs + frag->size; + else + ilen = JFFS2_F_I_SIZE(f); + ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f)); ri.uid = cpu_to_je16(JFFS2_F_I_UID(f)); ri.gid = cpu_to_je16(JFFS2_F_I_GID(f)); - ri.isize = cpu_to_je32(JFFS2_F_I_SIZE(f)); + ri.isize = cpu_to_je32(ilen); ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f)); ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f)); ri.mtime = cpu_to_je32(JFFS2_F_I_MTIME(f)); @@ -1168,7 +1186,7 @@ static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_era D1(printk(KERN_DEBUG "Expanded dnode to write from (0x%x-0x%x) to (0x%x-0x%x)\n", orig_start, orig_end, start, end)); - BUG_ON(end > JFFS2_F_I_SIZE(f)); + D1(BUG_ON(end > frag_last(&f->fragtree)->ofs + frag_last(&f->fragtree)->size)); BUG_ON(end < orig_end); BUG_ON(start > orig_start); } -- cgit