#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/pagemap.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
#include <asm/byteorder.h>
#include <linux/smp_lock.h>
#include <linux/time.h>
#include "jffs_fm.h"
long no_jffs_node = 0;
-long no_jffs_file = 0;
+static long no_jffs_file = 0;
#if defined(JFFS_MEMORY_DEBUG) && JFFS_MEMORY_DEBUG
long no_jffs_control = 0;
long no_jffs_raw_inode = 0;
static int jffs_scan_flash(struct jffs_control *c);
static int jffs_update_file(struct jffs_file *f, struct jffs_node *node);
+static int jffs_build_file(struct jffs_file *f);
+static int jffs_free_file(struct jffs_file *f);
+static int jffs_free_node_list(struct jffs_file *f);
+static int jffs_garbage_collect_now(struct jffs_control *c);
+static int jffs_insert_file_into_hash(struct jffs_file *f);
+static int jffs_remove_redundant_nodes(struct jffs_file *f);
+
+/* Is there enough space on the flash? */
+static inline int JFFS_ENOUGH_SPACE(struct jffs_control *c, __u32 space)
+{
+ struct jffs_fmcontrol *fmc = c->fmc;
+
+ while (1) {
+ if ((fmc->flash_size - (fmc->used_size + fmc->dirty_size))
+ >= fmc->min_free_size + space) {
+ return 1;
+ }
+ if (fmc->dirty_size < fmc->sector_size)
+ return 0;
+
+ if (jffs_garbage_collect_now(c)) {
+ D1(printk("JFFS_ENOUGH_SPACE: jffs_garbage_collect_now() failed.\n"));
+ return 0;
+ }
+ }
+}
#if CONFIG_JFFS_FS_VERBOSE > 0
static __u8
}
}
+/* Print the contents of a node. */
+static void
+jffs_print_node(struct jffs_node *n)
+{
+ D(printk("jffs_node: 0x%p\n", n));
+ D(printk("{\n"));
+ D(printk(" 0x%08x, /* version */\n", n->version));
+ D(printk(" 0x%08x, /* data_offset */\n", n->data_offset));
+ D(printk(" 0x%08x, /* data_size */\n", n->data_size));
+ D(printk(" 0x%08x, /* removed_size */\n", n->removed_size));
+ D(printk(" 0x%08x, /* fm_offset */\n", n->fm_offset));
+ D(printk(" 0x%02x, /* name_size */\n", n->name_size));
+ D(printk(" 0x%p, /* fm, fm->offset: %u */\n",
+ n->fm, (n->fm ? n->fm->offset : 0)));
+ D(printk(" 0x%p, /* version_prev */\n", n->version_prev));
+ D(printk(" 0x%p, /* version_next */\n", n->version_next));
+ D(printk(" 0x%p, /* range_prev */\n", n->range_prev));
+ D(printk(" 0x%p, /* range_next */\n", n->range_next));
+ D(printk("}\n"));
+}
+
#endif
+/* Print the contents of a raw inode. */
+static void
+jffs_print_raw_inode(struct jffs_raw_inode *raw_inode)
+{
+ D(printk("jffs_raw_inode: inode number: %u\n", raw_inode->ino));
+ D(printk("{\n"));
+ D(printk(" 0x%08x, /* magic */\n", raw_inode->magic));
+ D(printk(" 0x%08x, /* ino */\n", raw_inode->ino));
+ D(printk(" 0x%08x, /* pino */\n", raw_inode->pino));
+ D(printk(" 0x%08x, /* version */\n", raw_inode->version));
+ D(printk(" 0x%08x, /* mode */\n", raw_inode->mode));
+ D(printk(" 0x%04x, /* uid */\n", raw_inode->uid));
+ D(printk(" 0x%04x, /* gid */\n", raw_inode->gid));
+ D(printk(" 0x%08x, /* atime */\n", raw_inode->atime));
+ D(printk(" 0x%08x, /* mtime */\n", raw_inode->mtime));
+ D(printk(" 0x%08x, /* ctime */\n", raw_inode->ctime));
+ D(printk(" 0x%08x, /* offset */\n", raw_inode->offset));
+ D(printk(" 0x%08x, /* dsize */\n", raw_inode->dsize));
+ D(printk(" 0x%08x, /* rsize */\n", raw_inode->rsize));
+ D(printk(" 0x%02x, /* nsize */\n", raw_inode->nsize));
+ D(printk(" 0x%02x, /* nlink */\n", raw_inode->nlink));
+ D(printk(" 0x%02x, /* spare */\n",
+ raw_inode->spare));
+ D(printk(" %u, /* rename */\n",
+ raw_inode->rename));
+ D(printk(" %u, /* deleted */\n",
+ raw_inode->deleted));
+ D(printk(" 0x%02x, /* accurate */\n",
+ raw_inode->accurate));
+ D(printk(" 0x%08x, /* dchksum */\n", raw_inode->dchksum));
+ D(printk(" 0x%04x, /* nchksum */\n", raw_inode->nchksum));
+ D(printk(" 0x%04x, /* chksum */\n", raw_inode->chksum));
+ D(printk("}\n"));
+}
+
#define flash_safe_acquire(arg)
#define flash_safe_release(arg)
}
/* This routine calculates checksums in JFFS. */
-__u32
+static __u32
jffs_checksum(const void *data, int size)
{
__u32 sum = 0;
}
-int
+static int
jffs_checksum_flash(struct mtd_info *mtd, loff_t start, int size, __u32 *result)
{
__u32 sum = 0;
}
/* Free read buffer */
- kfree (read_buf);
+ kfree(read_buf);
/* Return result */
D3(printk("checksum result: 0x%08x\n", sum));
a (even) higher degree of confidence in your mount process.
A higher number would of course slow down your mount.
*/
-int check_partly_erased_sectors(struct jffs_fmcontrol *fmc){
+static int check_partly_erased_sectors(struct jffs_fmcontrol *fmc){
#define NUM_REREADS 4 /* see note above */
#define READ_AHEAD_BYTES 4096 /* must be a multiple of 4,
offset , fmc->sector_size);
flash_safe_release(fmc->mtd);
- kfree (read_buf);
+ kfree(read_buf);
return -1; /* bad, bad, bad! */
}
flash_safe_release(fmc->mtd);
- kfree (read_buf);
+ kfree(read_buf);
return -EAGAIN; /* erased offending sector. Try mount one more time please. */
}
if (!node) {
if (!(node = jffs_alloc_node())) {
/* Free read buffer */
- kfree (read_buf);
+ kfree(read_buf);
/* Release the flash device */
flash_safe_release(fmc->mtd);
DJM(no_jffs_node--);
/* Free read buffer */
- kfree (read_buf);
+ kfree(read_buf);
/* Release the flash device */
flash_safe_release(fmc->mtd);
flash_safe_release(fmc->flash_part);
/* Free read buffer */
- kfree (read_buf);
+ kfree(read_buf);
return -ENOMEM;
}
jffs_build_end(fmc);
/* Free read buffer */
- kfree (read_buf);
+ kfree(read_buf);
if(!num_free_space){
printk(KERN_WARNING "jffs_scan_flash(): Did not find even a single "
/* Remove redundant nodes from a file. Mark the on-flash memory
as dirty. */
-int
+static int
jffs_remove_redundant_nodes(struct jffs_file *f)
{
struct jffs_node *newest_node;
/* Insert a file into the hash table. */
-int
+static int
jffs_insert_file_into_hash(struct jffs_file *f)
{
int i = f->ino % f->c->hash_len;
/* Remove a file from the hash table. */
-int
+static int
jffs_unlink_file_from_hash(struct jffs_file *f)
{
D3(printk("jffs_unlink_file_from_hash(): f: 0x%p, "
{
struct jffs_file *f;
int i = ino % c->hash_len;
- struct list_head *tmp;
D3(printk("jffs_find_file(): ino: %u\n", ino));
- for (tmp = c->hash[i].next; tmp != &c->hash[i]; tmp = tmp->next) {
- f = list_entry(tmp, struct jffs_file, hash);
+ list_for_each_entry(f, &c->hash[i], hash) {
if (ino != f->ino)
continue;
D3(printk("jffs_find_file(): Found file with ino "
}
printk("jffs_find_child(): Didn't find the file \"%s\".\n",
(copy ? copy : ""));
- if (copy) {
- kfree(copy);
- }
+ kfree(copy);
});
return f;
iovec_cnt++;
if (JFFS_GET_PAD_BYTES(raw_inode->nsize)) {
- static char allff[3]={255,255,255};
+ static unsigned char allff[3]={255,255,255};
/* Add some extra padding if necessary */
node_iovec[iovec_cnt].iov_base = allff;
node_iovec[iovec_cnt].iov_len =
int result = 0;
for (pos = 0; pos < c->hash_len; pos++) {
- struct list_head *p, *next;
- for (p = c->hash[pos].next; p != &c->hash[pos]; p = next) {
- /* We need a reference to the next file in the
- list because `func' might remove the current
- file `f'. */
- next = p->next;
- r = func(list_entry(p, struct jffs_file, hash));
+ struct jffs_file *f, *next;
+
+ /* We must do _safe, because 'func' might remove the
+ current file 'f' from the list. */
+ list_for_each_entry_safe(f, next, &c->hash[pos], hash) {
+ r = func(f);
if (r < 0)
return r;
result += r;
/* Free all nodes associated with a file. */
-int
+static int
jffs_free_node_list(struct jffs_file *f)
{
struct jffs_node *node;
/* Free a file and its name. */
-int
+static int
jffs_free_file(struct jffs_file *f)
{
D3(printk("jffs_free_file: f #%u, \"%s\"\n",
return 0;
}
-long
+static long
jffs_get_file_count(void)
{
return no_jffs_file;
/* Build up a file's range list from scratch by going through the
version list. */
-int
+static int
jffs_build_file(struct jffs_file *f)
{
struct jffs_node *n;
return 0;
}
-
-/* Print the contents of a node. */
-void
-jffs_print_node(struct jffs_node *n)
-{
- D(printk("jffs_node: 0x%p\n", n));
- D(printk("{\n"));
- D(printk(" 0x%08x, /* version */\n", n->version));
- D(printk(" 0x%08x, /* data_offset */\n", n->data_offset));
- D(printk(" 0x%08x, /* data_size */\n", n->data_size));
- D(printk(" 0x%08x, /* removed_size */\n", n->removed_size));
- D(printk(" 0x%08x, /* fm_offset */\n", n->fm_offset));
- D(printk(" 0x%02x, /* name_size */\n", n->name_size));
- D(printk(" 0x%p, /* fm, fm->offset: %u */\n",
- n->fm, (n->fm ? n->fm->offset : 0)));
- D(printk(" 0x%p, /* version_prev */\n", n->version_prev));
- D(printk(" 0x%p, /* version_next */\n", n->version_next));
- D(printk(" 0x%p, /* range_prev */\n", n->range_prev));
- D(printk(" 0x%p, /* range_next */\n", n->range_next));
- D(printk("}\n"));
-}
-
-
-/* Print the contents of a raw inode. */
-void
-jffs_print_raw_inode(struct jffs_raw_inode *raw_inode)
-{
- D(printk("jffs_raw_inode: inode number: %u\n", raw_inode->ino));
- D(printk("{\n"));
- D(printk(" 0x%08x, /* magic */\n", raw_inode->magic));
- D(printk(" 0x%08x, /* ino */\n", raw_inode->ino));
- D(printk(" 0x%08x, /* pino */\n", raw_inode->pino));
- D(printk(" 0x%08x, /* version */\n", raw_inode->version));
- D(printk(" 0x%08x, /* mode */\n", raw_inode->mode));
- D(printk(" 0x%04x, /* uid */\n", raw_inode->uid));
- D(printk(" 0x%04x, /* gid */\n", raw_inode->gid));
- D(printk(" 0x%08x, /* atime */\n", raw_inode->atime));
- D(printk(" 0x%08x, /* mtime */\n", raw_inode->mtime));
- D(printk(" 0x%08x, /* ctime */\n", raw_inode->ctime));
- D(printk(" 0x%08x, /* offset */\n", raw_inode->offset));
- D(printk(" 0x%08x, /* dsize */\n", raw_inode->dsize));
- D(printk(" 0x%08x, /* rsize */\n", raw_inode->rsize));
- D(printk(" 0x%02x, /* nsize */\n", raw_inode->nsize));
- D(printk(" 0x%02x, /* nlink */\n", raw_inode->nlink));
- D(printk(" 0x%02x, /* spare */\n",
- raw_inode->spare));
- D(printk(" %u, /* rename */\n",
- raw_inode->rename));
- D(printk(" %u, /* deleted */\n",
- raw_inode->deleted));
- D(printk(" 0x%02x, /* accurate */\n",
- raw_inode->accurate));
- D(printk(" 0x%08x, /* dchksum */\n", raw_inode->dchksum));
- D(printk(" 0x%04x, /* nchksum */\n", raw_inode->nchksum));
- D(printk(" 0x%04x, /* chksum */\n", raw_inode->chksum));
- D(printk("}\n"));
-}
-
-
/* Print the contents of a file. */
+#if 0
int
jffs_print_file(struct jffs_file *f)
{
D(printk("}\n"));
return 0;
}
-
+#endif /* 0 */
void
jffs_print_hash_table(struct jffs_control *c)
printk("JFFS: Dumping the file system's hash table...\n");
for (i = 0; i < c->hash_len; i++) {
- struct list_head *p;
- for (p = c->hash[i].next; p != &c->hash[i]; p = p->next) {
- struct jffs_file *f=list_entry(p,struct jffs_file,hash);
+ struct jffs_file *f;
+ list_for_each_entry(f, &c->hash[i], hash) {
printk("*** c->hash[%u]: \"%s\" "
"(ino: %u, pino: %u)\n",
i, (f->name ? f->name : ""),
/* Rewrite `size' bytes, and begin at `node'. */
-int
+static int
jffs_rewrite_data(struct jffs_file *f, struct jffs_node *node, __u32 size)
{
struct jffs_control *c = f->c;
process and is often called multiple times at each occasion of a
garbage collect. */
-int
+static int
jffs_garbage_collect_next(struct jffs_control *c)
{
struct jffs_fmcontrol *fmc = c->fmc;
} /* jffs_clear_end_of_node() */
/* Try to erase as much as possible of the dirt in the flash memory. */
-long
+static long
jffs_try_to_erase(struct jffs_control *c)
{
struct jffs_fmcontrol *fmc = c->fmc;
collection can be. */
-int
+static int
jffs_garbage_collect_now(struct jffs_control *c)
{
struct jffs_fmcontrol *fmc = c->fmc;
siginfo_t info;
unsigned long signr = 0;
+ if (try_to_freeze())
+ continue;
+
spin_lock_irq(¤t->sighand->siglock);
signr = dequeue_signal(current, ¤t->blocked, &info);
spin_unlock_irq(¤t->sighand->siglock);
D1(printk (KERN_NOTICE "jffs_garbage_collect_thread(): collecting.\n"));
D3(printk (KERN_NOTICE "g_c_thread(): down biglock\n"));
- down(&fmc->biglock);
+ mutex_lock(&fmc->biglock);
D1(printk("***jffs_garbage_collect_thread(): round #%u, "
"fmc->dirty_size = %u\n", i++, fmc->dirty_size));
gc_end:
D3(printk (KERN_NOTICE "g_c_thread(): up biglock\n"));
- up(&fmc->biglock);
+ mutex_unlock(&fmc->biglock);
} /* for (;;) */
} /* jffs_garbage_collect_thread() */
git://git.onelab.eu / linux-2.6.git / blobdiff