*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: write.c,v 1.75 2003/10/08 11:45:11 dwmw2 Exp $
+ * $Id: write.c,v 1.85 2004/07/13 08:58:25 dwmw2 Exp $
*
*/
#include <linux/pagemap.h>
#include <linux/mtd/mtd.h>
#include "nodelist.h"
+#include "compr.h"
int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri)
memset(ic, 0, sizeof(*ic));
- init_MUTEX_LOCKED(&f->sem);
f->inocache = ic;
f->inocache->nlink = 1;
f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dnode *fn;
size_t retlen;
- struct iovec vecs[2];
+ struct kvec vecs[2];
int ret;
int retried = 0;
unsigned long cnt = 2;
fn->raw = raw;
raw->flash_offset = flash_ofs;
- raw->totlen = PAD(sizeof(*ri)+datalen);
+ raw->__totlen = PAD(sizeof(*ri)+datalen);
raw->next_phys = NULL;
ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen,
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
size_t retlen;
- struct iovec vecs[2];
+ struct kvec vecs[2];
int retried = 0;
int ret;
fd->raw = raw;
raw->flash_offset = flash_ofs;
- raw->totlen = PAD(sizeof(*rd)+namelen);
+ raw->__totlen = PAD(sizeof(*rd)+namelen);
raw->next_phys = NULL;
ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen,
- (alloc_mode==ALLOC_GC)?0:fd->ino);
+ (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino));
if (ret || (retlen != sizeof(*rd) + namelen)) {
printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n",
sizeof(*rd)+namelen, flash_ofs, ret, retlen);
while(writelen) {
struct jffs2_full_dnode *fn;
unsigned char *comprbuf = NULL;
- unsigned char comprtype = JFFS2_COMPR_NONE;
+ uint16_t comprtype = JFFS2_COMPR_NONE;
uint32_t phys_ofs, alloclen;
uint32_t datalen, cdatalen;
int retried = 0;
break;
}
down(&f->sem);
- datalen = writelen;
- cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), writelen);
+ datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1)));
+ cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen);
- comprbuf = kmalloc(cdatalen, GFP_KERNEL);
- if (comprbuf) {
- comprtype = jffs2_compress(buf, comprbuf, &datalen, &cdatalen);
- }
- if (comprtype == JFFS2_COMPR_NONE) {
- /* Either compression failed, or the allocation of comprbuf failed */
- if (comprbuf)
- kfree(comprbuf);
- comprbuf = buf;
- datalen = cdatalen;
- }
- /* Now comprbuf points to the data to be written, be it compressed or not.
- comprtype holds the compression type, and comprtype == JFFS2_COMPR_NONE means
- that the comprbuf doesn't need to be kfree()d.
- */
+ comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen);
ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE);
ri->offset = cpu_to_je32(offset);
ri->csize = cpu_to_je32(cdatalen);
ri->dsize = cpu_to_je32(datalen);
- ri->compr = comprtype;
+ ri->compr = comprtype & 0xff;
+ ri->usercompr = (comprtype >> 8 ) & 0xff;
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen));
fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY);
- if (comprtype != JFFS2_COMPR_NONE)
- kfree(comprbuf);
+ jffs2_free_comprbuf(comprbuf, buf);
if (IS_ERR(fn)) {
ret = PTR_ERR(fn);
uint32_t alloclen, phys_ofs;
int ret;
- rd = jffs2_alloc_raw_dirent();
- if (!rd)
- return -ENOMEM;
+ if (1 /* alternative branch needs testing */ ||
+ !jffs2_can_mark_obsolete(c)) {
+ /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */
- ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_DELETION);
- if (ret) {
+ rd = jffs2_alloc_raw_dirent();
+ if (!rd)
+ return -ENOMEM;
+
+ ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_DELETION);
+ if (ret) {
+ jffs2_free_raw_dirent(rd);
+ return ret;
+ }
+
+ down(&dir_f->sem);
+
+ /* Build a deletion node */
+ rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
+ rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
+ rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
+ rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
+
+ rd->pino = cpu_to_je32(dir_f->inocache->ino);
+ rd->version = cpu_to_je32(++dir_f->highest_version);
+ rd->ino = cpu_to_je32(0);
+ rd->mctime = cpu_to_je32(get_seconds());
+ rd->nsize = namelen;
+ rd->type = DT_UNKNOWN;
+ rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
+ rd->name_crc = cpu_to_je32(crc32(0, name, namelen));
+
+ fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION);
+
jffs2_free_raw_dirent(rd);
- return ret;
- }
- down(&dir_f->sem);
+ if (IS_ERR(fd)) {
+ jffs2_complete_reservation(c);
+ up(&dir_f->sem);
+ return PTR_ERR(fd);
+ }
- /* Build a deletion node */
- rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
- rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
- rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
- rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
+ /* File it. This will mark the old one obsolete. */
+ jffs2_add_fd_to_list(c, fd, &dir_f->dents);
+ up(&dir_f->sem);
+ } else {
+ struct jffs2_full_dirent **prev = &dir_f->dents;
+ uint32_t nhash = full_name_hash(name, namelen);
- rd->pino = cpu_to_je32(dir_f->inocache->ino);
- rd->version = cpu_to_je32(++dir_f->highest_version);
- rd->ino = cpu_to_je32(0);
- rd->mctime = cpu_to_je32(get_seconds());
- rd->nsize = namelen;
- rd->type = DT_UNKNOWN;
- rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
- rd->name_crc = cpu_to_je32(crc32(0, name, namelen));
+ down(&dir_f->sem);
- fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION);
-
- jffs2_free_raw_dirent(rd);
+ while ((*prev) && (*prev)->nhash <= nhash) {
+ if ((*prev)->nhash == nhash &&
+ !memcmp((*prev)->name, name, namelen) &&
+ !(*prev)->name[namelen]) {
+ struct jffs2_full_dirent *this = *prev;
- if (IS_ERR(fd)) {
- jffs2_complete_reservation(c);
+ D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n",
+ this->ino, ref_offset(this->raw)));
+
+ *prev = this->next;
+ jffs2_mark_node_obsolete(c, (this->raw));
+ jffs2_free_full_dirent(this);
+ break;
+ }
+ prev = &((*prev)->next);
+ }
up(&dir_f->sem);
- return PTR_ERR(fd);
}
- /* File it. This will mark the old one obsolete. */
- jffs2_add_fd_to_list(c, fd, &dir_f->dents);
-
- up(&dir_f->sem);
-
/* dead_f is NULL if this was a rename not a real unlink */
/* Also catch the !f->inocache case, where there was a dirent
pointing to an inode which didn't exist. */
git://git.onelab.eu / linux-2.6.git / blobdiff