| /* |
| * JFFS2 -- Journalling Flash File System, Version 2. |
| * |
| * Copyright (C) 2001-2003 Red Hat, Inc. |
| * |
| * Created by David Woodhouse <dwmw2@infradead.org> |
| * |
| * For licensing information, see the file 'LICENCE' in this directory. |
| * |
| * $Id: write.c,v 1.94 2005/07/20 15:50:51 dedekind Exp $ |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/crc32.h> |
| #include <linux/slab.h> |
| #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) |
| { |
| struct jffs2_inode_cache *ic; |
| |
| ic = jffs2_alloc_inode_cache(); |
| if (!ic) { |
| return -ENOMEM; |
| } |
| |
| memset(ic, 0, sizeof(*ic)); |
| |
| f->inocache = ic; |
| f->inocache->nlink = 1; |
| f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; |
| f->inocache->state = INO_STATE_PRESENT; |
| |
| |
| jffs2_add_ino_cache(c, f->inocache); |
| D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); |
| ri->ino = cpu_to_je32(f->inocache->ino); |
| |
| ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); |
| ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); |
| ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); |
| ri->mode = cpu_to_jemode(mode); |
| |
| f->highest_version = 1; |
| ri->version = cpu_to_je32(f->highest_version); |
| |
| return 0; |
| } |
| |
| /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, |
| write it to the flash, link it into the existing inode/fragment list */ |
| |
| struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const unsigned char *data, uint32_t datalen, uint32_t flash_ofs, int alloc_mode) |
| |
| { |
| struct jffs2_raw_node_ref *raw; |
| struct jffs2_full_dnode *fn; |
| size_t retlen; |
| struct kvec vecs[2]; |
| int ret; |
| int retried = 0; |
| unsigned long cnt = 2; |
| |
| D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { |
| printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); |
| BUG(); |
| } |
| ); |
| vecs[0].iov_base = ri; |
| vecs[0].iov_len = sizeof(*ri); |
| vecs[1].iov_base = (unsigned char *)data; |
| vecs[1].iov_len = datalen; |
| |
| jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
| |
| if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { |
| printk(KERN_WARNING "jffs2_write_dnode: ri->totlen (0x%08x) != sizeof(*ri) (0x%08zx) + datalen (0x%08x)\n", je32_to_cpu(ri->totlen), sizeof(*ri), datalen); |
| } |
| raw = jffs2_alloc_raw_node_ref(); |
| if (!raw) |
| return ERR_PTR(-ENOMEM); |
| |
| fn = jffs2_alloc_full_dnode(); |
| if (!fn) { |
| jffs2_free_raw_node_ref(raw); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| fn->ofs = je32_to_cpu(ri->offset); |
| fn->size = je32_to_cpu(ri->dsize); |
| fn->frags = 0; |
| |
| /* check number of valid vecs */ |
| if (!datalen || !data) |
| cnt = 1; |
| retry: |
| fn->raw = raw; |
| |
| raw->flash_offset = flash_ofs; |
| raw->__totlen = PAD(sizeof(*ri)+datalen); |
| raw->next_phys = NULL; |
| |
| if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { |
| BUG_ON(!retried); |
| D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " |
| "highest version %d -> updating dnode\n", |
| je32_to_cpu(ri->version), f->highest_version)); |
| ri->version = cpu_to_je32(++f->highest_version); |
| ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
| } |
| |
| ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, |
| (alloc_mode==ALLOC_GC)?0:f->inocache->ino); |
| |
| if (ret || (retlen != sizeof(*ri) + datalen)) { |
| printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
| sizeof(*ri)+datalen, flash_ofs, ret, retlen); |
| |
| /* Mark the space as dirtied */ |
| if (retlen) { |
| /* Doesn't belong to any inode */ |
| raw->next_in_ino = NULL; |
| |
| /* Don't change raw->size to match retlen. We may have |
| written the node header already, and only the data will |
| seem corrupted, in which case the scan would skip over |
| any node we write before the original intended end of |
| this node */ |
| raw->flash_offset |= REF_OBSOLETE; |
| jffs2_add_physical_node_ref(c, raw); |
| jffs2_mark_node_obsolete(c, raw); |
| } else { |
| printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); |
| jffs2_free_raw_node_ref(raw); |
| } |
| if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { |
| /* Try to reallocate space and retry */ |
| uint32_t dummy; |
| struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; |
| |
| retried = 1; |
| |
| D1(printk(KERN_DEBUG "Retrying failed write.\n")); |
| |
| jffs2_dbg_acct_sanity_check(c,jeb); |
| jffs2_dbg_acct_paranoia_check(c, jeb); |
| |
| if (alloc_mode == ALLOC_GC) { |
| ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, &dummy); |
| } else { |
| /* Locking pain */ |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| |
| ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, &dummy, alloc_mode); |
| down(&f->sem); |
| } |
| |
| if (!ret) { |
| D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); |
| |
| jffs2_dbg_acct_sanity_check(c,jeb); |
| jffs2_dbg_acct_paranoia_check(c, jeb); |
| |
| goto retry; |
| } |
| D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); |
| jffs2_free_raw_node_ref(raw); |
| } |
| /* Release the full_dnode which is now useless, and return */ |
| jffs2_free_full_dnode(fn); |
| return ERR_PTR(ret?ret:-EIO); |
| } |
| /* Mark the space used */ |
| /* If node covers at least a whole page, or if it starts at the |
| beginning of a page and runs to the end of the file, or if |
| it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. |
| */ |
| if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || |
| ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && |
| (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { |
| raw->flash_offset |= REF_PRISTINE; |
| } else { |
| raw->flash_offset |= REF_NORMAL; |
| } |
| jffs2_add_physical_node_ref(c, raw); |
| |
| /* Link into per-inode list */ |
| spin_lock(&c->erase_completion_lock); |
| raw->next_in_ino = f->inocache->nodes; |
| f->inocache->nodes = raw; |
| spin_unlock(&c->erase_completion_lock); |
| |
| D1(printk(KERN_DEBUG "jffs2_write_dnode wrote node at 0x%08x(%d) with dsize 0x%x, csize 0x%x, node_crc 0x%08x, data_crc 0x%08x, totlen 0x%08x\n", |
| flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), |
| je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), |
| je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); |
| |
| if (retried) { |
| jffs2_dbg_acct_sanity_check(c,NULL); |
| } |
| |
| return fn; |
| } |
| |
| struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_dirent *rd, const unsigned char *name, uint32_t namelen, uint32_t flash_ofs, int alloc_mode) |
| { |
| struct jffs2_raw_node_ref *raw; |
| struct jffs2_full_dirent *fd; |
| size_t retlen; |
| struct kvec vecs[2]; |
| int retried = 0; |
| int ret; |
| |
| D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", |
| je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), |
| je32_to_cpu(rd->name_crc))); |
| |
| D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { |
| printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); |
| BUG(); |
| } |
| ); |
| |
| vecs[0].iov_base = rd; |
| vecs[0].iov_len = sizeof(*rd); |
| vecs[1].iov_base = (unsigned char *)name; |
| vecs[1].iov_len = namelen; |
| |
| jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
| |
| raw = jffs2_alloc_raw_node_ref(); |
| |
| if (!raw) |
| return ERR_PTR(-ENOMEM); |
| |
| fd = jffs2_alloc_full_dirent(namelen+1); |
| if (!fd) { |
| jffs2_free_raw_node_ref(raw); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| fd->version = je32_to_cpu(rd->version); |
| fd->ino = je32_to_cpu(rd->ino); |
| fd->nhash = full_name_hash(name, strlen(name)); |
| fd->type = rd->type; |
| memcpy(fd->name, name, namelen); |
| fd->name[namelen]=0; |
| |
| retry: |
| fd->raw = raw; |
| |
| raw->flash_offset = flash_ofs; |
| raw->__totlen = PAD(sizeof(*rd)+namelen); |
| raw->next_phys = NULL; |
| |
| if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { |
| BUG_ON(!retried); |
| D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " |
| "highest version %d -> updating dirent\n", |
| je32_to_cpu(rd->version), f->highest_version)); |
| rd->version = cpu_to_je32(++f->highest_version); |
| fd->version = je32_to_cpu(rd->version); |
| rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); |
| } |
| |
| ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, |
| (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); |
| /* Mark the space as dirtied */ |
| if (retlen) { |
| raw->next_in_ino = NULL; |
| raw->flash_offset |= REF_OBSOLETE; |
| jffs2_add_physical_node_ref(c, raw); |
| jffs2_mark_node_obsolete(c, raw); |
| } else { |
| printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); |
| jffs2_free_raw_node_ref(raw); |
| } |
| if (!retried && (raw = jffs2_alloc_raw_node_ref())) { |
| /* Try to reallocate space and retry */ |
| uint32_t dummy; |
| struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; |
| |
| retried = 1; |
| |
| D1(printk(KERN_DEBUG "Retrying failed write.\n")); |
| |
| jffs2_dbg_acct_sanity_check(c,jeb); |
| jffs2_dbg_acct_paranoia_check(c, jeb); |
| |
| if (alloc_mode == ALLOC_GC) { |
| ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, &dummy); |
| } else { |
| /* Locking pain */ |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| |
| ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, &dummy, alloc_mode); |
| down(&f->sem); |
| } |
| |
| if (!ret) { |
| D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); |
| jffs2_dbg_acct_sanity_check(c,jeb); |
| jffs2_dbg_acct_paranoia_check(c, jeb); |
| goto retry; |
| } |
| D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); |
| jffs2_free_raw_node_ref(raw); |
| } |
| /* Release the full_dnode which is now useless, and return */ |
| jffs2_free_full_dirent(fd); |
| return ERR_PTR(ret?ret:-EIO); |
| } |
| /* Mark the space used */ |
| raw->flash_offset |= REF_PRISTINE; |
| jffs2_add_physical_node_ref(c, raw); |
| |
| spin_lock(&c->erase_completion_lock); |
| raw->next_in_ino = f->inocache->nodes; |
| f->inocache->nodes = raw; |
| spin_unlock(&c->erase_completion_lock); |
| |
| if (retried) { |
| jffs2_dbg_acct_sanity_check(c,NULL); |
| } |
| |
| return fd; |
| } |
| |
| /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that |
| we don't have to go digging in struct inode or its equivalent. It should set: |
| mode, uid, gid, (starting)isize, atime, ctime, mtime */ |
| int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
| struct jffs2_raw_inode *ri, unsigned char *buf, |
| uint32_t offset, uint32_t writelen, uint32_t *retlen) |
| { |
| int ret = 0; |
| uint32_t writtenlen = 0; |
| |
| D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", |
| f->inocache->ino, offset, writelen)); |
| |
| while(writelen) { |
| struct jffs2_full_dnode *fn; |
| unsigned char *comprbuf = NULL; |
| uint16_t comprtype = JFFS2_COMPR_NONE; |
| uint32_t phys_ofs, alloclen; |
| uint32_t datalen, cdatalen; |
| int retried = 0; |
| |
| retry: |
| D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); |
| |
| ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, &alloclen, ALLOC_NORMAL); |
| if (ret) { |
| D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); |
| break; |
| } |
| down(&f->sem); |
| datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); |
| cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); |
| |
| 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->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); |
| ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); |
| |
| ri->ino = cpu_to_je32(f->inocache->ino); |
| ri->version = cpu_to_je32(++f->highest_version); |
| ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); |
| ri->offset = cpu_to_je32(offset); |
| ri->csize = cpu_to_je32(cdatalen); |
| ri->dsize = cpu_to_je32(datalen); |
| 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); |
| |
| jffs2_free_comprbuf(comprbuf, buf); |
| |
| if (IS_ERR(fn)) { |
| ret = PTR_ERR(fn); |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| if (!retried) { |
| /* Write error to be retried */ |
| retried = 1; |
| D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); |
| goto retry; |
| } |
| break; |
| } |
| ret = jffs2_add_full_dnode_to_inode(c, f, fn); |
| if (f->metadata) { |
| jffs2_mark_node_obsolete(c, f->metadata->raw); |
| jffs2_free_full_dnode(f->metadata); |
| f->metadata = NULL; |
| } |
| if (ret) { |
| /* Eep */ |
| D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); |
| jffs2_mark_node_obsolete(c, fn->raw); |
| jffs2_free_full_dnode(fn); |
| |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| break; |
| } |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| if (!datalen) { |
| printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); |
| ret = -EIO; |
| break; |
| } |
| D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); |
| writtenlen += datalen; |
| offset += datalen; |
| writelen -= datalen; |
| buf += datalen; |
| } |
| *retlen = writtenlen; |
| return ret; |
| } |
| |
| int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen) |
| { |
| struct jffs2_raw_dirent *rd; |
| struct jffs2_full_dnode *fn; |
| struct jffs2_full_dirent *fd; |
| uint32_t alloclen, phys_ofs; |
| int ret; |
| |
| /* Try to reserve enough space for both node and dirent. |
| * Just the node will do for now, though |
| */ |
| ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); |
| D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); |
| if (ret) { |
| up(&f->sem); |
| return ret; |
| } |
| |
| ri->data_crc = cpu_to_je32(0); |
| ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
| |
| fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); |
| |
| D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", |
| jemode_to_cpu(ri->mode))); |
| |
| if (IS_ERR(fn)) { |
| D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); |
| /* Eeek. Wave bye bye */ |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| return PTR_ERR(fn); |
| } |
| /* No data here. Only a metadata node, which will be |
| obsoleted by the first data write |
| */ |
| f->metadata = fn; |
| |
| up(&f->sem); |
| jffs2_complete_reservation(c); |
| ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); |
| |
| if (ret) { |
| /* Eep. */ |
| D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); |
| return ret; |
| } |
| |
| rd = jffs2_alloc_raw_dirent(); |
| if (!rd) { |
| /* Argh. Now we treat it like a normal delete */ |
| jffs2_complete_reservation(c); |
| return -ENOMEM; |
| } |
| |
| down(&dir_f->sem); |
| |
| 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 = ri->ino; |
| rd->mctime = ri->ctime; |
| rd->nsize = namelen; |
| rd->type = DT_REG; |
| 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_NORMAL); |
| |
| jffs2_free_raw_dirent(rd); |
| |
| if (IS_ERR(fd)) { |
| /* dirent failed to write. Delete the inode normally |
| as if it were the final unlink() */ |
| jffs2_complete_reservation(c); |
| up(&dir_f->sem); |
| return PTR_ERR(fd); |
| } |
| |
| /* Link the fd into the inode's list, obsoleting an old |
| one if necessary. */ |
| jffs2_add_fd_to_list(c, fd, &dir_f->dents); |
| |
| jffs2_complete_reservation(c); |
| up(&dir_f->sem); |
| |
| return 0; |
| } |
| |
| |
| int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, |
| const char *name, int namelen, struct jffs2_inode_info *dead_f) |
| { |
| struct jffs2_raw_dirent *rd; |
| struct jffs2_full_dirent *fd; |
| uint32_t alloclen, phys_ofs; |
| int ret; |
| |
| 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 */ |
| |
| 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); |
| |
| if (IS_ERR(fd)) { |
| jffs2_complete_reservation(c); |
| 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); |
| } else { |
| struct jffs2_full_dirent **prev = &dir_f->dents; |
| uint32_t nhash = full_name_hash(name, namelen); |
| |
| down(&dir_f->sem); |
| |
| while ((*prev) && (*prev)->nhash <= nhash) { |
| if ((*prev)->nhash == nhash && |
| !memcmp((*prev)->name, name, namelen) && |
| !(*prev)->name[namelen]) { |
| struct jffs2_full_dirent *this = *prev; |
| |
| 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); |
| } |
| |
| /* 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. */ |
| if (dead_f && dead_f->inocache) { |
| |
| down(&dead_f->sem); |
| |
| if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { |
| while (dead_f->dents) { |
| /* There can be only deleted ones */ |
| fd = dead_f->dents; |
| |
| dead_f->dents = fd->next; |
| |
| if (fd->ino) { |
| printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", |
| dead_f->inocache->ino, fd->name, fd->ino); |
| } else { |
| D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", |
| fd->name, dead_f->inocache->ino)); |
| } |
| jffs2_mark_node_obsolete(c, fd->raw); |
| jffs2_free_full_dirent(fd); |
| } |
| } |
| |
| dead_f->inocache->nlink--; |
| /* NB: Caller must set inode nlink if appropriate */ |
| up(&dead_f->sem); |
| } |
| |
| jffs2_complete_reservation(c); |
| |
| return 0; |
| } |
| |
| |
| int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, uint8_t type, const char *name, int namelen) |
| { |
| struct jffs2_raw_dirent *rd; |
| struct jffs2_full_dirent *fd; |
| uint32_t alloclen, phys_ofs; |
| int ret; |
| |
| rd = jffs2_alloc_raw_dirent(); |
| if (!rd) |
| return -ENOMEM; |
| |
| ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); |
| 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(ino); |
| rd->mctime = cpu_to_je32(get_seconds()); |
| rd->nsize = namelen; |
| |
| rd->type = type; |
| |
| 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_NORMAL); |
| |
| jffs2_free_raw_dirent(rd); |
| |
| if (IS_ERR(fd)) { |
| jffs2_complete_reservation(c); |
| 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); |
| |
| jffs2_complete_reservation(c); |
| up(&dir_f->sem); |
| |
| return 0; |
| } |