*
* Copyright (C) 2001-2003 Red Hat, Inc.
*
- * Created by David Woodhouse <dwmw2@redhat.com>
+ * Created by David Woodhouse <dwmw2@infradead.org>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: fs.c,v 1.32 2003/10/11 11:47:23 dwmw2 Exp $
+ * $Id: fs.c,v 1.66 2005/09/27 13:17:29 dedekind Exp $
*
*/
-#include <linux/version.h>
+#include <linux/capability.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mtd/mtd.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include <linux/vfs.h>
#include <linux/crc32.h>
#include "nodelist.h"
+static int jffs2_flash_setup(struct jffs2_sb_info *c);
static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
{
int ret;
D1(printk(KERN_DEBUG "jffs2_setattr(): ino #%lu\n", inode->i_ino));
ret = inode_change_ok(inode, iattr);
- if (ret)
+ if (ret)
return ret;
/* Special cases - we don't want more than one data node
mdata = kmalloc(f->metadata->size, GFP_USER);
if (!mdata)
return -ENOMEM;
- ret = jffs2_read_dnode(c, f->metadata, mdata, 0, mdatalen);
+ ret = jffs2_read_dnode(c, f, f->metadata, mdata, 0, mdatalen);
if (ret) {
kfree(mdata);
return ret;
kfree(mdata);
return -ENOMEM;
}
-
- ret = jffs2_reserve_space(c, sizeof(*ri) + mdatalen, &phys_ofs, &alloclen, ALLOC_NORMAL);
+
+ ret = jffs2_reserve_space(c, sizeof(*ri) + mdatalen, &phys_ofs, &alloclen,
+ ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
jffs2_free_raw_inode(ri);
if (S_ISLNK(inode->i_mode & S_IFMT))
}
down(&f->sem);
ivalid = iattr->ia_valid;
-
+
ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE);
ri->totlen = cpu_to_je32(sizeof(*ri) + mdatalen);
if (iattr->ia_mode & S_ISGID &&
!in_group_p(je16_to_cpu(ri->gid)) && !capable(CAP_FSETID))
ri->mode = cpu_to_jemode(iattr->ia_mode & ~S_ISGID);
- else
+ else
ri->mode = cpu_to_jemode(iattr->ia_mode);
else
ri->mode = cpu_to_jemode(inode->i_mode);
new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, phys_ofs, ALLOC_NORMAL);
if (S_ISLNK(inode->i_mode))
kfree(mdata);
-
+
if (IS_ERR(new_metadata)) {
jffs2_complete_reservation(c);
jffs2_free_raw_inode(ri);
old_metadata = f->metadata;
- if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) {
- vmtruncate(inode, iattr->ia_size);
- jffs2_truncate_fraglist (c, &f->fragtree, iattr->ia_size);
- }
+ if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size)
+ jffs2_truncate_fragtree (c, &f->fragtree, iattr->ia_size);
if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) {
jffs2_add_full_dnode_to_inode(c, f, new_metadata);
up(&f->sem);
jffs2_complete_reservation(c);
+ /* We have to do the vmtruncate() 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)
+ vmtruncate(inode, iattr->ia_size);
+
return 0;
}
buf->f_namelen = JFFS2_MAX_NAME_LEN;
spin_lock(&c->erase_completion_lock);
-
avail = c->dirty_size + c->free_size;
if (avail > c->sector_size * c->resv_blocks_write)
avail -= c->sector_size * c->resv_blocks_write;
else
avail = 0;
+ spin_unlock(&c->erase_completion_lock);
buf->f_bavail = buf->f_bfree = avail >> PAGE_SHIFT;
- D1(jffs2_dump_block_lists(c));
-
- spin_unlock(&c->erase_completion_lock);
-
return 0;
}
void jffs2_clear_inode (struct inode *inode)
{
- /* We can forget about this inode for now - drop all
+ /* We can forget about this inode for now - drop all
* the nodelists associated with it, etc.
*/
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));
jffs2_do_clear_inode(c, f);
c = JFFS2_SB_INFO(inode->i_sb);
jffs2_init_inode_info(f);
-
+ down(&f->sem);
+
ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node);
if (ret) {
inode->i_blksize = PAGE_SIZE;
inode->i_blocks = (inode->i_size + 511) >> 9;
-
+
switch (inode->i_mode & S_IFMT) {
jint16_t rdev;
case S_IFLNK:
inode->i_op = &jffs2_symlink_inode_operations;
break;
-
+
case S_IFDIR:
{
struct jffs2_full_dirent *fd;
case S_IFCHR:
/* Read the device numbers from the media */
D1(printk(KERN_DEBUG "Reading device numbers from flash\n"));
- if (jffs2_read_dnode(c, f->metadata, (char *)&rdev, 0, sizeof(rdev)) < 0) {
+ if (jffs2_read_dnode(c, f, f->metadata, (char *)&rdev, 0, sizeof(rdev)) < 0) {
/* Eep */
printk(KERN_NOTICE "Read device numbers for inode %lu failed\n", (unsigned long)inode->i_ino);
up(&f->sem);
jffs2_do_clear_inode(c, f);
make_bad_inode(inode);
return;
- }
+ }
case S_IFSOCK:
case S_IFIFO:
struct iattr iattr;
if (!(inode->i_state & I_DIRTY_DATASYNC)) {
- D1(printk(KERN_DEBUG "jffs2_dirty_inode() not calling setattr() for ino #%lu\n", inode->i_ino));
+ D2(printk(KERN_DEBUG "jffs2_dirty_inode() not calling setattr() for ino #%lu\n", inode->i_ino));
return;
}
/* We stop if it was running, then restart if it needs to.
This also catches the case where it was stopped and this
- is just a remount to restart it */
- if (!(sb->s_flags & MS_RDONLY))
+ is just a remount to restart it.
+ Flush the writebuffer, if neccecary, else we loose it */
+ if (!(sb->s_flags & MS_RDONLY)) {
jffs2_stop_garbage_collect_thread(c);
+ down(&c->alloc_sem);
+ jffs2_flush_wbuf_pad(c);
+ up(&c->alloc_sem);
+ }
if (!(*flags & MS_RDONLY))
jffs2_start_garbage_collect_thread(c);
-
+
*flags |= MS_NOATIME;
return 0;
D1(printk(KERN_DEBUG "jffs2_write_super()\n"));
jffs2_garbage_collect_trigger(c);
- jffs2_erase_pending_blocks(c);
+ jffs2_erase_pending_blocks(c, 0);
jffs2_flush_wbuf_gc(c, 0);
}
D1(printk(KERN_DEBUG "jffs2_new_inode(): dir_i %ld, mode 0x%x\n", dir_i->i_ino, mode));
c = JFFS2_SB_INFO(sb);
-
+
inode = new_inode(sb);
-
+
if (!inode)
return ERR_PTR(-ENOMEM);
f = JFFS2_INODE_INFO(inode);
jffs2_init_inode_info(f);
+ down(&f->sem);
memset(ri, 0, sizeof(*ri));
/* Set OS-specific defaults for new inodes */
inode->i_mode = jemode_to_cpu(ri->mode);
inode->i_gid = je16_to_cpu(ri->gid);
inode->i_uid = je16_to_cpu(ri->uid);
- inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+ inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
ri->atime = ri->mtime = ri->ctime = cpu_to_je32(I_SEC(inode->i_mtime));
inode->i_blksize = PAGE_SIZE;
c = JFFS2_SB_INFO(sb);
+#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
+ if (c->mtd->type == MTD_NANDFLASH) {
+ printk(KERN_ERR "jffs2: Cannot operate on NAND flash unless jffs2 NAND support is compiled in.\n");
+ return -EINVAL;
+ }
+ if (c->mtd->type == MTD_DATAFLASH) {
+ printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n");
+ return -EINVAL;
+ }
+#endif
+
c->flash_size = c->mtd->size;
+ c->sector_size = c->mtd->erasesize;
+ blocks = c->flash_size / c->sector_size;
- /*
- * Check, if we have to concatenate physical blocks to larger virtual blocks
- * to reduce the memorysize for c->blocks. (kmalloc allows max. 128K allocation)
+ /*
+ * Size alignment check
*/
- blocks = c->flash_size / c->mtd->erasesize;
- while ((blocks * sizeof (struct jffs2_eraseblock)) > (128 * 1024))
- blocks >>= 1;
-
- c->sector_size = c->flash_size / blocks;
- if (c->sector_size != c->mtd->erasesize)
- printk(KERN_INFO "jffs2: Erase block size too small (%dKiB). Using virtual blocks size (%dKiB) instead\n",
- c->mtd->erasesize / 1024, c->sector_size / 1024);
+ if ((c->sector_size * blocks) != c->flash_size) {
+ c->flash_size = c->sector_size * blocks;
+ printk(KERN_INFO "jffs2: Flash size not aligned to erasesize, reducing to %dKiB\n",
+ c->flash_size / 1024);
+ }
if (c->flash_size < 5*c->sector_size) {
printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size);
}
c->cleanmarker_size = sizeof(struct jffs2_unknown_node);
- /* Joern -- stick alignment for weird 8-byte-page flash here */
- if (jffs2_cleanmarker_oob(c)) {
- /* NAND (or other bizarre) flash... do setup accordingly */
- ret = jffs2_nand_flash_setup(c);
- if (ret)
- return ret;
- }
+ /* NAND (or other bizarre) flash... do setup accordingly */
+ ret = jffs2_flash_setup(c);
+ if (ret)
+ return ret;
c->inocache_list = kmalloc(INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
if (!c->inocache_list) {
root_i = iget(sb, 1);
if (is_bad_inode(root_i)) {
D1(printk(KERN_WARNING "get root inode failed\n"));
- goto out_nodes;
+ goto out_root_i;
}
D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n"));
if (!sb->s_root)
goto out_root_i;
-#if LINUX_VERSION_CODE >= 0x20403
sb->s_maxbytes = 0xFFFFFFFF;
-#endif
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = JFFS2_SUPER_MAGIC;
out_root_i:
iput(root_i);
- out_nodes:
jffs2_free_ino_caches(c);
jffs2_free_raw_node_refs(c);
- kfree(c->blocks);
+ if (jffs2_blocks_use_vmalloc(c))
+ vfree(c->blocks);
+ else
+ kfree(c->blocks);
out_inohash:
kfree(c->inocache_list);
out_wbuf:
- jffs2_nand_flash_cleanup(c);
+ jffs2_flash_cleanup(c);
return ret;
}
+
+void jffs2_gc_release_inode(struct jffs2_sb_info *c,
+ struct jffs2_inode_info *f)
+{
+ iput(OFNI_EDONI_2SFFJ(f));
+}
+
+struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
+ int inum, int nlink)
+{
+ struct inode *inode;
+ struct jffs2_inode_cache *ic;
+ if (!nlink) {
+ /* The inode has zero nlink but its nodes weren't yet marked
+ obsolete. This has to be because we're still waiting for
+ the final (close() and) iput() to happen.
+
+ There's a possibility that the final iput() could have
+ happened while we were contemplating. In order to ensure
+ that we don't cause a new read_inode() (which would fail)
+ for the inode in question, we use ilookup() in this case
+ instead of iget().
+
+ The nlink can't _become_ zero at this point because we're
+ holding the alloc_sem, and jffs2_do_unlink() would also
+ need that while decrementing nlink on any inode.
+ */
+ inode = ilookup(OFNI_BS_2SFFJ(c), inum);
+ if (!inode) {
+ D1(printk(KERN_DEBUG "ilookup() failed for ino #%u; inode is probably deleted.\n",
+ inum));
+
+ spin_lock(&c->inocache_lock);
+ ic = jffs2_get_ino_cache(c, inum);
+ if (!ic) {
+ D1(printk(KERN_DEBUG "Inode cache for ino #%u is gone.\n", inum));
+ spin_unlock(&c->inocache_lock);
+ return NULL;
+ }
+ if (ic->state != INO_STATE_CHECKEDABSENT) {
+ /* Wait for progress. Don't just loop */
+ D1(printk(KERN_DEBUG "Waiting for ino #%u in state %d\n",
+ ic->ino, ic->state));
+ sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock);
+ } else {
+ spin_unlock(&c->inocache_lock);
+ }
+
+ return NULL;
+ }
+ } else {
+ /* Inode has links to it still; they're not going away because
+ jffs2_do_unlink() would need the alloc_sem and we have it.
+ Just iget() it, and if read_inode() is necessary that's OK.
+ */
+ inode = iget(OFNI_BS_2SFFJ(c), inum);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ }
+ if (is_bad_inode(inode)) {
+ printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. nlink %d\n",
+ inum, nlink);
+ /* NB. This will happen again. We need to do something appropriate here. */
+ iput(inode);
+ return ERR_PTR(-EIO);
+ }
+
+ return JFFS2_INODE_INFO(inode);
+}
+
+unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
+ struct jffs2_inode_info *f,
+ unsigned long offset,
+ unsigned long *priv)
+{
+ struct inode *inode = OFNI_EDONI_2SFFJ(f);
+ struct page *pg;
+
+ pg = read_cache_page(inode->i_mapping, offset >> PAGE_CACHE_SHIFT,
+ (void *)jffs2_do_readpage_unlock, inode);
+ if (IS_ERR(pg))
+ return (void *)pg;
+
+ *priv = (unsigned long)pg;
+ return kmap(pg);
+}
+
+void jffs2_gc_release_page(struct jffs2_sb_info *c,
+ unsigned char *ptr,
+ unsigned long *priv)
+{
+ struct page *pg = (void *)*priv;
+
+ kunmap(pg);
+ page_cache_release(pg);
+}
+
+static int jffs2_flash_setup(struct jffs2_sb_info *c) {
+ int ret = 0;
+
+ if (jffs2_cleanmarker_oob(c)) {
+ /* NAND flash... do setup accordingly */
+ ret = jffs2_nand_flash_setup(c);
+ if (ret)
+ return ret;
+ }
+
+ /* add setups for other bizarre flashes here... */
+ if (jffs2_nor_ecc(c)) {
+ ret = jffs2_nor_ecc_flash_setup(c);
+ if (ret)
+ return ret;
+ }
+
+ /* and Dataflash */
+ if (jffs2_dataflash(c)) {
+ ret = jffs2_dataflash_setup(c);
+ if (ret)
+ return ret;
+ }
+
+ /* and Intel "Sibley" flash */
+ if (jffs2_nor_wbuf_flash(c)) {
+ ret = jffs2_nor_wbuf_flash_setup(c);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+void jffs2_flash_cleanup(struct jffs2_sb_info *c) {
+
+ if (jffs2_cleanmarker_oob(c)) {
+ jffs2_nand_flash_cleanup(c);
+ }
+
+ /* add cleanups for other bizarre flashes here... */
+ if (jffs2_nor_ecc(c)) {
+ jffs2_nor_ecc_flash_cleanup(c);
+ }
+
+ /* and DataFlash */
+ if (jffs2_dataflash(c)) {
+ jffs2_dataflash_cleanup(c);
+ }
+
+ /* and Intel "Sibley" flash */
+ if (jffs2_nor_wbuf_flash(c)) {
+ jffs2_nor_wbuf_flash_cleanup(c);
+ }
+}