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authorArtem B. Bityutskiy <dedekind@infradead.org>2005-09-22 12:25:00 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-06 22:20:33 +0100
commit733802d974e5af42acb7cd61b16c0ce6dd03b7ed (patch)
tree56f77d78d9a2df474bb1686f5d060ee1e84a4d68 /fs/jffs2/build.c
parentb523b3bac3a745fefd6f604082f2ffa09b808e5e (diff)
downloadlinux-linaro-733802d974e5af42acb7cd61b16c0ce6dd03b7ed.tar.gz
[JFFS2] Debug code simplification, update TODO
Simplify the debugging code further. Update the TODO list Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/jffs2/build.c')
-rw-r--r--fs/jffs2/build.c112
1 files changed, 53 insertions, 59 deletions
diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c
index f2cf562ebd2..ac393b3d6ea 100644
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: build.c,v 1.79 2005/09/07 11:21:57 havasi Exp $
+ * $Id: build.c,v 1.83 2005/09/21 15:52:33 dedekind Exp $
*
*/
@@ -18,7 +18,8 @@
#include <linux/mtd/mtd.h>
#include "nodelist.h"
-static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *, struct jffs2_inode_cache *, struct jffs2_full_dirent **);
+static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *,
+ struct jffs2_inode_cache *, struct jffs2_full_dirent **);
static inline struct jffs2_inode_cache *
first_inode_chain(int *i, struct jffs2_sb_info *c)
@@ -46,11 +47,12 @@ next_inode(int *i, struct jffs2_inode_cache *ic, struct jffs2_sb_info *c)
ic = next_inode(&i, ic, (c)))
-static inline void jffs2_build_inode_pass1(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)
+static inline void jffs2_build_inode_pass1(struct jffs2_sb_info *c,
+ struct jffs2_inode_cache *ic)
{
struct jffs2_full_dirent *fd;
- D1(printk(KERN_DEBUG "jffs2_build_inode building directory inode #%u\n", ic->ino));
+ dbg_fsbuild("building directory inode #%u\n", ic->ino);
/* For each child, increase nlink */
for(fd = ic->scan_dents; fd; fd = fd->next) {
@@ -58,26 +60,23 @@ static inline void jffs2_build_inode_pass1(struct jffs2_sb_info *c, struct jffs2
if (!fd->ino)
continue;
- /* XXX: Can get high latency here with huge directories */
+ /* we can get high latency here with huge directories */
child_ic = jffs2_get_ino_cache(c, fd->ino);
if (!child_ic) {
- printk(KERN_NOTICE "Eep. Child \"%s\" (ino #%u) of dir ino #%u doesn't exist!\n",
+ dbg_fsbuild("child \"%s\" (ino #%u) of dir ino #%u doesn't exist!\n",
fd->name, fd->ino, ic->ino);
jffs2_mark_node_obsolete(c, fd->raw);
continue;
}
if (child_ic->nlink++ && fd->type == DT_DIR) {
- printk(KERN_NOTICE "Child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n", fd->name, fd->ino, ic->ino);
- if (fd->ino == 1 && ic->ino == 1) {
- printk(KERN_NOTICE "This is mostly harmless, and probably caused by creating a JFFS2 image\n");
- printk(KERN_NOTICE "using a buggy version of mkfs.jffs2. Use at least v1.17.\n");
- }
- /* What do we do about it? */
+ JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n",
+ fd->name, fd->ino, ic->ino);
+ /* TODO: What do we do about it? */
}
- D1(printk(KERN_DEBUG "Increased nlink for child \"%s\" (ino #%u)\n", fd->name, fd->ino));
- /* Can't free them. We might need them in pass 2 */
+ dbg_fsbuild("increased nlink for child \"%s\" (ino #%u)\n", fd->name, fd->ino);
+ /* Can't free scan_dents so far. We might need them in pass 2 */
}
}
@@ -94,6 +93,8 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
struct jffs2_full_dirent *fd;
struct jffs2_full_dirent *dead_fds = NULL;
+ dbg_fsbuild("build FS data structures\n");
+
/* First, scan the medium and build all the inode caches with
lists of physical nodes */
@@ -103,33 +104,29 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
if (ret)
goto exit;
- D1(printk(KERN_DEBUG "Scanned flash completely\n"));
+ dbg_fsbuild("scanned flash completely\n");
jffs2_dbg_dump_block_lists_nolock(c);
+ dbg_fsbuild("pass 1 starting\n");
c->flags |= JFFS2_SB_FLAG_BUILDING;
/* Now scan the directory tree, increasing nlink according to every dirent found. */
for_each_inode(i, c, ic) {
- D1(printk(KERN_DEBUG "Pass 1: ino #%u\n", ic->ino));
-
- D1(BUG_ON(ic->ino > c->highest_ino));
-
if (ic->scan_dents) {
jffs2_build_inode_pass1(c, ic);
cond_resched();
}
}
- D1(printk(KERN_DEBUG "Pass 1 complete\n"));
+ dbg_fsbuild("pass 1 complete\n");
/* Next, scan for inodes with nlink == 0 and remove them. If
they were directories, then decrement the nlink of their
children too, and repeat the scan. As that's going to be
a fairly uncommon occurrence, it's not so evil to do it this
way. Recursion bad. */
- D1(printk(KERN_DEBUG "Pass 2 starting\n"));
+ dbg_fsbuild("pass 2 starting\n");
for_each_inode(i, c, ic) {
- D1(printk(KERN_DEBUG "Pass 2: ino #%u, nlink %d, ic %p, nodes %p\n", ic->ino, ic->nlink, ic, ic->nodes));
if (ic->nlink)
continue;
@@ -137,26 +134,24 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
cond_resched();
}
- D1(printk(KERN_DEBUG "Pass 2a starting\n"));
+ dbg_fsbuild("pass 2a starting\n");
while (dead_fds) {
fd = dead_fds;
dead_fds = fd->next;
ic = jffs2_get_ino_cache(c, fd->ino);
- D1(printk(KERN_DEBUG "Removing dead_fd ino #%u (\"%s\"), ic at %p\n", fd->ino, fd->name, ic));
if (ic)
jffs2_build_remove_unlinked_inode(c, ic, &dead_fds);
jffs2_free_full_dirent(fd);
}
- D1(printk(KERN_DEBUG "Pass 2 complete\n"));
+ dbg_fsbuild("pass 2a complete\n");
+ dbg_fsbuild("freeing temporary data structures\n");
/* Finally, we can scan again and free the dirent structs */
for_each_inode(i, c, ic) {
- D1(printk(KERN_DEBUG "Pass 3: ino #%u, ic %p, nodes %p\n", ic->ino, ic, ic->nodes));
-
while(ic->scan_dents) {
fd = ic->scan_dents;
ic->scan_dents = fd->next;
@@ -167,8 +162,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
}
c->flags &= ~JFFS2_SB_FLAG_BUILDING;
- D1(printk(KERN_DEBUG "Pass 3 complete\n"));
- jffs2_dbg_dump_block_lists_nolock(c);
+ dbg_fsbuild("FS build complete\n");
/* Rotate the lists by some number to ensure wear levelling */
jffs2_rotate_lists(c);
@@ -189,24 +183,26 @@ exit:
return ret;
}
-static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, struct jffs2_full_dirent **dead_fds)
+static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c,
+ struct jffs2_inode_cache *ic,
+ struct jffs2_full_dirent **dead_fds)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
- D1(printk(KERN_DEBUG "JFFS2: Removing ino #%u with nlink == zero.\n", ic->ino));
+ dbg_fsbuild("removing ino #%u with nlink == zero.\n", ic->ino);
raw = ic->nodes;
while (raw != (void *)ic) {
struct jffs2_raw_node_ref *next = raw->next_in_ino;
- D1(printk(KERN_DEBUG "obsoleting node at 0x%08x\n", ref_offset(raw)));
+ dbg_fsbuild("obsoleting node at 0x%08x\n", ref_offset(raw));
jffs2_mark_node_obsolete(c, raw);
raw = next;
}
if (ic->scan_dents) {
int whinged = 0;
- D1(printk(KERN_DEBUG "Inode #%u was a directory which may have children...\n", ic->ino));
+ dbg_fsbuild("inode #%u was a directory which may have children...\n", ic->ino);
while(ic->scan_dents) {
struct jffs2_inode_cache *child_ic;
@@ -216,21 +212,19 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c, struct jf
if (!fd->ino) {
/* It's a deletion dirent. Ignore it */
- D1(printk(KERN_DEBUG "Child \"%s\" is a deletion dirent, skipping...\n", fd->name));
+ dbg_fsbuild("child \"%s\" is a deletion dirent, skipping...\n", fd->name);
jffs2_free_full_dirent(fd);
continue;
}
- if (!whinged) {
+ if (!whinged)
whinged = 1;
- printk(KERN_NOTICE "Inode #%u was a directory with children - removing those too...\n", ic->ino);
- }
- D1(printk(KERN_DEBUG "Removing child \"%s\", ino #%u\n",
- fd->name, fd->ino));
+ dbg_fsbuild("removing child \"%s\", ino #%u\n", fd->name, fd->ino);
child_ic = jffs2_get_ino_cache(c, fd->ino);
if (!child_ic) {
- printk(KERN_NOTICE "Cannot remove child \"%s\", ino #%u, because it doesn't exist\n", fd->name, fd->ino);
+ dbg_fsbuild("cannot remove child \"%s\", ino #%u, because it doesn't exist\n",
+ fd->name, fd->ino);
jffs2_free_full_dirent(fd);
continue;
}
@@ -241,13 +235,13 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c, struct jf
child_ic->nlink--;
if (!child_ic->nlink) {
- D1(printk(KERN_DEBUG "Inode #%u (\"%s\") has now got zero nlink. Adding to dead_fds list.\n",
- fd->ino, fd->name));
+ dbg_fsbuild("inode #%u (\"%s\") has now got zero nlink, adding to dead_fds list.\n",
+ fd->ino, fd->name);
fd->next = *dead_fds;
*dead_fds = fd;
} else {
- D1(printk(KERN_DEBUG "Inode #%u (\"%s\") has now got nlink %d. Ignoring.\n",
- fd->ino, fd->name, child_ic->nlink));
+ dbg_fsbuild("inode #%u (\"%s\") has now got nlink %d. Ignoring.\n",
+ fd->ino, fd->name, child_ic->nlink);
jffs2_free_full_dirent(fd);
}
}
@@ -295,20 +289,20 @@ static void jffs2_calc_trigger_levels(struct jffs2_sb_info *c)
trying to GC to make more space. It'll be a fruitless task */
c->nospc_dirty_size = c->sector_size + (c->flash_size / 100);
- D1(printk(KERN_DEBUG "JFFS2 trigger levels (size %d KiB, block size %d KiB, %d blocks)\n",
- c->flash_size / 1024, c->sector_size / 1024, c->nr_blocks));
- D1(printk(KERN_DEBUG "Blocks required to allow deletion: %d (%d KiB)\n",
- c->resv_blocks_deletion, c->resv_blocks_deletion*c->sector_size/1024));
- D1(printk(KERN_DEBUG "Blocks required to allow writes: %d (%d KiB)\n",
- c->resv_blocks_write, c->resv_blocks_write*c->sector_size/1024));
- D1(printk(KERN_DEBUG "Blocks required to quiesce GC thread: %d (%d KiB)\n",
- c->resv_blocks_gctrigger, c->resv_blocks_gctrigger*c->sector_size/1024));
- D1(printk(KERN_DEBUG "Blocks required to allow GC merges: %d (%d KiB)\n",
- c->resv_blocks_gcmerge, c->resv_blocks_gcmerge*c->sector_size/1024));
- D1(printk(KERN_DEBUG "Blocks required to GC bad blocks: %d (%d KiB)\n",
- c->resv_blocks_gcbad, c->resv_blocks_gcbad*c->sector_size/1024));
- D1(printk(KERN_DEBUG "Amount of dirty space required to GC: %d bytes\n",
- c->nospc_dirty_size));
+ dbg_fsbuild("JFFS2 trigger levels (size %d KiB, block size %d KiB, %d blocks)\n",
+ c->flash_size / 1024, c->sector_size / 1024, c->nr_blocks);
+ dbg_fsbuild("Blocks required to allow deletion: %d (%d KiB)\n",
+ c->resv_blocks_deletion, c->resv_blocks_deletion*c->sector_size/1024);
+ dbg_fsbuild("Blocks required to allow writes: %d (%d KiB)\n",
+ c->resv_blocks_write, c->resv_blocks_write*c->sector_size/1024);
+ dbg_fsbuild("Blocks required to quiesce GC thread: %d (%d KiB)\n",
+ c->resv_blocks_gctrigger, c->resv_blocks_gctrigger*c->sector_size/1024);
+ dbg_fsbuild("Blocks required to allow GC merges: %d (%d KiB)\n",
+ c->resv_blocks_gcmerge, c->resv_blocks_gcmerge*c->sector_size/1024);
+ dbg_fsbuild("Blocks required to GC bad blocks: %d (%d KiB)\n",
+ c->resv_blocks_gcbad, c->resv_blocks_gcbad*c->sector_size/1024);
+ dbg_fsbuild("Amount of dirty space required to GC: %d bytes\n",
+ c->nospc_dirty_size);
}
int jffs2_do_mount_fs(struct jffs2_sb_info *c)
@@ -358,7 +352,7 @@ int jffs2_do_mount_fs(struct jffs2_sb_info *c)
return ret;
if (jffs2_build_filesystem(c)) {
- D1(printk(KERN_DEBUG "build_fs failed\n"));
+ dbg_fsbuild("build_fs failed\n");
jffs2_free_ino_caches(c);
jffs2_free_raw_node_refs(c);
#ifndef __ECOS