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fs/jffs2/write.c
21.3 KB
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/* * JFFS2 -- Journalling Flash File System, Version 2. * |
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* Copyright © 2001-2007 Red Hat, Inc. |
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* * Created by David Woodhouse <dwmw2@infradead.org> * * For licensing information, see the file 'LICENCE' in this directory. * |
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*/ #include <linux/kernel.h> #include <linux/fs.h> #include <linux/crc32.h> |
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#include <linux/pagemap.h> #include <linux/mtd/mtd.h> #include "nodelist.h" #include "compr.h" |
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int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri) |
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{ struct jffs2_inode_cache *ic; ic = jffs2_alloc_inode_cache(); if (!ic) { return -ENOMEM; } memset(ic, 0, sizeof(*ic)); f->inocache = ic; |
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f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */ |
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f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; |
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f->inocache->state = INO_STATE_PRESENT; |
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|
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jffs2_add_ino_cache(c, f->inocache); |
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D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d ", f->inocache->ino)); ri->ino = cpu_to_je32(f->inocache->ino); |
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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; } |
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/* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, |
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write it to the flash, link it into the existing inode/fragment list */ |
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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, int alloc_mode) |
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{ |
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struct jffs2_full_dnode *fn; size_t retlen; |
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uint32_t flash_ofs; |
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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() "); BUG(); } ); vecs[0].iov_base = ri; vecs[0].iov_len = sizeof(*ri); vecs[1].iov_base = (unsigned char *)data; vecs[1].iov_len = datalen; |
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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) ", je32_to_cpu(ri->totlen), sizeof(*ri), datalen); } |
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|
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fn = jffs2_alloc_full_dnode(); |
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if (!fn) |
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return ERR_PTR(-ENOMEM); |
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/* check number of valid vecs */ if (!datalen || !data) cnt = 1; retry: |
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flash_ofs = write_ofs(c); |
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jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
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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, " |
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"highest version %d -> updating dnode ", |
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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)); |
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} |
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ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, (alloc_mode==ALLOC_GC)?0:f->inocache->ino); if (ret || (retlen != sizeof(*ri) + datalen)) { |
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printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd ", |
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sizeof(*ri)+datalen, flash_ofs, ret, retlen); /* Mark the space as dirtied */ if (retlen) { |
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/* Don't change raw->size to match retlen. We may have |
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written the node header already, and only the data will seem corrupted, in which case the scan would skip over |
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any node we write before the original intended end of |
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this node */ |
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jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*ri)+datalen), NULL); |
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} else { |
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printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero ", flash_ofs); |
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} |
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if (!retried && alloc_mode != ALLOC_NORETRY) { |
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/* 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. ")); |
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|
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jffs2_dbg_acct_sanity_check(c,jeb); jffs2_dbg_acct_paranoia_check(c, jeb); |
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if (alloc_mode == ALLOC_GC) { |
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ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &dummy, JFFS2_SUMMARY_INODE_SIZE); |
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} else { /* Locking pain */ |
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mutex_unlock(&f->sem); |
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jffs2_complete_reservation(c); |
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|
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ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy, alloc_mode, JFFS2_SUMMARY_INODE_SIZE); |
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mutex_lock(&f->sem); |
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} if (!ret) { |
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flash_ofs = write_ofs(c); |
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D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write. ", flash_ofs)); |
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jffs2_dbg_acct_sanity_check(c,jeb); jffs2_dbg_acct_paranoia_check(c, jeb); |
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goto retry; } D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d! ", ret)); |
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} /* 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 */ |
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/* 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. |
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*/ 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)))) { |
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flash_ofs |= REF_PRISTINE; |
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} else { |
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flash_ofs |= REF_NORMAL; |
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} |
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fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache); |
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if (IS_ERR(fn->raw)) { void *hold_err = fn->raw; /* Release the full_dnode which is now useless, and return */ jffs2_free_full_dnode(fn); |
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return ERR_CAST(hold_err); |
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} |
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fn->ofs = je32_to_cpu(ri->offset); fn->size = je32_to_cpu(ri->dsize); fn->frags = 0; |
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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 ", |
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flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), |
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je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); if (retried) { |
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jffs2_dbg_acct_sanity_check(c,NULL); |
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} return fn; } |
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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, int alloc_mode) |
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{ |
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struct jffs2_full_dirent *fd; size_t retlen; struct kvec vecs[2]; |
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uint32_t flash_ofs; |
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int retried = 0; int ret; |
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D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x) ", |
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je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), je32_to_cpu(rd->name_crc))); |
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|
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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() "); BUG(); |
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}); |
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if (strnlen(name, namelen) != namelen) { /* This should never happen, but seems to have done on at least one occasion: https://dev.laptop.org/ticket/4184 */ printk(KERN_CRIT "Error in jffs2_write_dirent() -- name contains zero bytes! "); printk(KERN_CRIT "Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x ", je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), je32_to_cpu(rd->name_crc)); WARN_ON(1); return ERR_PTR(-EIO); } |
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vecs[0].iov_base = rd; vecs[0].iov_len = sizeof(*rd); vecs[1].iov_base = (unsigned char *)name; vecs[1].iov_len = namelen; |
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|
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fd = jffs2_alloc_full_dirent(namelen+1); |
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if (!fd) |
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return ERR_PTR(-ENOMEM); |
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fd->version = je32_to_cpu(rd->version); fd->ino = je32_to_cpu(rd->ino); |
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fd->nhash = full_name_hash(name, namelen); |
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fd->type = rd->type; memcpy(fd->name, name, namelen); fd->name[namelen]=0; retry: |
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flash_ofs = write_ofs(c); |
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|
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jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
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|
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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 ", 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)); |
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} |
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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)) { |
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printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd ", |
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sizeof(*rd)+namelen, flash_ofs, ret, retlen); /* Mark the space as dirtied */ if (retlen) { |
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jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); |
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} else { |
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printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero ", flash_ofs); |
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} |
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if (!retried) { |
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/* 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. ")); |
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jffs2_dbg_acct_sanity_check(c,jeb); jffs2_dbg_acct_paranoia_check(c, jeb); |
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if (alloc_mode == ALLOC_GC) { |
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ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
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} else { /* Locking pain */ |
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mutex_unlock(&f->sem); |
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jffs2_complete_reservation(c); |
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|
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ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
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mutex_lock(&f->sem); |
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} if (!ret) { |
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flash_ofs = write_ofs(c); |
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D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write. ", flash_ofs)); |
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jffs2_dbg_acct_sanity_check(c,jeb); jffs2_dbg_acct_paranoia_check(c, jeb); |
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goto retry; } D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d! ", ret)); |
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} /* 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 */ |
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fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), PAD(sizeof(*rd)+namelen), f->inocache); |
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if (IS_ERR(fd->raw)) { void *hold_err = fd->raw; /* Release the full_dirent which is now useless, and return */ jffs2_free_full_dirent(fd); |
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return ERR_CAST(hold_err); |
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} |
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if (retried) { |
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jffs2_dbg_acct_sanity_check(c,NULL); |
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} 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, |
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struct jffs2_raw_inode *ri, unsigned char *buf, |
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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 ", f->inocache->ino, offset, writelen)); |
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|
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while(writelen) { struct jffs2_full_dnode *fn; unsigned char *comprbuf = NULL; uint16_t comprtype = JFFS2_COMPR_NONE; |
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uint32_t alloclen; |
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uint32_t datalen, cdatalen; int retried = 0; retry: D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x ", writelen, offset)); |
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ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, |
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&alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
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if (ret) { D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d ", ret)); break; } |
ced220703 [JFFS2] semaphore... |
366 |
mutex_lock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 |
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)); |
9fe4854cd [JFFS2] Remove fl... |
387 |
fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); |
1da177e4c Linux-2.6.12-rc2 |
388 389 390 391 392 |
jffs2_free_comprbuf(comprbuf, buf); if (IS_ERR(fn)) { ret = PTR_ERR(fn); |
ced220703 [JFFS2] semaphore... |
393 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 |
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() ")); 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 ", ret)); jffs2_mark_node_obsolete(c, fn->raw); jffs2_free_full_dnode(fn); |
ced220703 [JFFS2] semaphore... |
416 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
417 418 419 |
jffs2_complete_reservation(c); break; } |
ced220703 [JFFS2] semaphore... |
420 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 |
jffs2_complete_reservation(c); if (!datalen) { printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range() "); ret = -EIO; break; } D1(printk(KERN_DEBUG "increasing writtenlen by %d ", datalen)); writtenlen += datalen; offset += datalen; writelen -= datalen; buf += datalen; } *retlen = writtenlen; return ret; } |
2a7dba391 fs/vfs/security: ... |
438 439 440 |
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 struct qstr *qstr) |
1da177e4c Linux-2.6.12-rc2 |
441 442 443 444 |
{ struct jffs2_raw_dirent *rd; struct jffs2_full_dnode *fn; struct jffs2_full_dirent *fd; |
9fe4854cd [JFFS2] Remove fl... |
445 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
446 |
int ret; |
182ec4eee [JFFS2] Clean up ... |
447 448 |
/* Try to reserve enough space for both node and dirent. * Just the node will do for now, though |
1da177e4c Linux-2.6.12-rc2 |
449 |
*/ |
9fe4854cd [JFFS2] Remove fl... |
450 |
ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, |
e631ddba5 [JFFS2] Add erase... |
451 |
JFFS2_SUMMARY_INODE_SIZE); |
1da177e4c Linux-2.6.12-rc2 |
452 453 |
D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes ", alloclen)); |
590fe34c4 [JFFS2] Quiet loc... |
454 |
if (ret) |
1da177e4c Linux-2.6.12-rc2 |
455 |
return ret; |
590fe34c4 [JFFS2] Quiet loc... |
456 457 |
mutex_lock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
458 459 460 |
ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
9fe4854cd [JFFS2] Remove fl... |
461 |
fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
462 463 464 465 466 467 468 469 470 |
D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x ", jemode_to_cpu(ri->mode))); if (IS_ERR(fn)) { D1(printk(KERN_DEBUG "jffs2_write_dnode() failed ")); /* Eeek. Wave bye bye */ |
ced220703 [JFFS2] semaphore... |
471 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
472 473 474 |
jffs2_complete_reservation(c); return PTR_ERR(fn); } |
182ec4eee [JFFS2] Clean up ... |
475 |
/* No data here. Only a metadata node, which will be |
1da177e4c Linux-2.6.12-rc2 |
476 477 478 |
obsoleted by the first data write */ f->metadata = fn; |
ced220703 [JFFS2] semaphore... |
479 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
480 |
jffs2_complete_reservation(c); |
cfc8dc6f6 [JFFS2] Tidy up f... |
481 |
|
2a7dba391 fs/vfs/security: ... |
482 |
ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode, qstr); |
cfc8dc6f6 [JFFS2] Tidy up f... |
483 484 485 486 487 |
if (ret) return ret; ret = jffs2_init_acl_post(&f->vfs_inode); if (ret) return ret; |
2a7dba391 fs/vfs/security: ... |
488 489 |
ret = jffs2_reserve_space(c, sizeof(*rd)+qstr->len, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(qstr->len)); |
182ec4eee [JFFS2] Clean up ... |
490 |
|
1da177e4c Linux-2.6.12-rc2 |
491 492 493 494 495 496 497 498 499 500 501 502 503 |
if (ret) { /* Eep. */ D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed ")); return ret; } rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); return -ENOMEM; } |
ced220703 [JFFS2] semaphore... |
504 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
505 506 507 |
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); |
2a7dba391 fs/vfs/security: ... |
508 |
rd->totlen = cpu_to_je32(sizeof(*rd) + qstr->len); |
1da177e4c Linux-2.6.12-rc2 |
509 510 511 512 513 514 |
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; |
2a7dba391 fs/vfs/security: ... |
515 |
rd->nsize = qstr->len; |
1da177e4c Linux-2.6.12-rc2 |
516 517 |
rd->type = DT_REG; rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); |
2a7dba391 fs/vfs/security: ... |
518 |
rd->name_crc = cpu_to_je32(crc32(0, qstr->name, qstr->len)); |
1da177e4c Linux-2.6.12-rc2 |
519 |
|
2a7dba391 fs/vfs/security: ... |
520 |
fd = jffs2_write_dirent(c, dir_f, rd, qstr->name, qstr->len, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
521 522 |
jffs2_free_raw_dirent(rd); |
182ec4eee [JFFS2] Clean up ... |
523 |
|
1da177e4c Linux-2.6.12-rc2 |
524 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
525 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
526 527 |
as if it were the final unlink() */ jffs2_complete_reservation(c); |
ced220703 [JFFS2] semaphore... |
528 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
529 530 531 532 533 534 535 536 |
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); |
ced220703 [JFFS2] semaphore... |
537 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
538 539 540 541 542 543 |
return 0; } int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, |
3a69e0cd2 [JFFS2] Fix JFFS2... |
544 545 |
const char *name, int namelen, struct jffs2_inode_info *dead_f, uint32_t time) |
1da177e4c Linux-2.6.12-rc2 |
546 547 548 |
{ struct jffs2_raw_dirent *rd; struct jffs2_full_dirent *fd; |
9fe4854cd [JFFS2] Remove fl... |
549 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
550 |
int ret; |
a491486a2 [JFFS2] Obsolete ... |
551 |
if (!jffs2_can_mark_obsolete(c)) { |
1da177e4c Linux-2.6.12-rc2 |
552 553 554 555 556 |
/* 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; |
9fe4854cd [JFFS2] Remove fl... |
557 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba5 [JFFS2] Add erase... |
558 |
ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 |
if (ret) { jffs2_free_raw_dirent(rd); return ret; } |
ced220703 [JFFS2] semaphore... |
563 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
564 565 566 567 568 569 |
/* 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)); |
182ec4eee [JFFS2] Clean up ... |
570 |
|
1da177e4c Linux-2.6.12-rc2 |
571 572 573 |
rd->pino = cpu_to_je32(dir_f->inocache->ino); rd->version = cpu_to_je32(++dir_f->highest_version); rd->ino = cpu_to_je32(0); |
3a69e0cd2 [JFFS2] Fix JFFS2... |
574 |
rd->mctime = cpu_to_je32(time); |
1da177e4c Linux-2.6.12-rc2 |
575 576 577 578 |
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)); |
9fe4854cd [JFFS2] Remove fl... |
579 |
fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); |
182ec4eee [JFFS2] Clean up ... |
580 |
|
1da177e4c Linux-2.6.12-rc2 |
581 582 583 584 |
jffs2_free_raw_dirent(rd); if (IS_ERR(fd)) { jffs2_complete_reservation(c); |
ced220703 [JFFS2] semaphore... |
585 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
586 587 588 589 590 |
return PTR_ERR(fd); } /* File it. This will mark the old one obsolete. */ jffs2_add_fd_to_list(c, fd, &dir_f->dents); |
ced220703 [JFFS2] semaphore... |
591 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
592 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
593 |
uint32_t nhash = full_name_hash(name, namelen); |
bf66737ca [JFFS2] fix spars... |
594 |
fd = dir_f->dents; |
b57486433 JFFS2 locking reg... |
595 596 |
/* We don't actually want to reserve any space, but we do want to be holding the alloc_sem when we write to flash */ |
ced220703 [JFFS2] semaphore... |
597 598 |
mutex_lock(&c->alloc_sem); mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
599 |
|
15953580e [JFFS2] Improve g... |
600 601 602 603 |
for (fd = dir_f->dents; fd; fd = fd->next) { if (fd->nhash == nhash && !memcmp(fd->name, name, namelen) && !fd->name[namelen]) { |
1da177e4c Linux-2.6.12-rc2 |
604 605 606 |
D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete ", |
15953580e [JFFS2] Improve g... |
607 608 609 610 611 612 613 614 |
fd->ino, ref_offset(fd->raw))); jffs2_mark_node_obsolete(c, fd->raw); /* We don't want to remove it from the list immediately, because that screws up getdents()/seek() semantics even more than they're screwed already. Turn it into a node-less deletion dirent instead -- a placeholder */ fd->raw = NULL; fd->ino = 0; |
1da177e4c Linux-2.6.12-rc2 |
615 616 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
617 |
} |
ced220703 [JFFS2] semaphore... |
618 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
619 620 621 622 623 |
} /* 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. */ |
182ec4eee [JFFS2] Clean up ... |
624 |
if (dead_f && dead_f->inocache) { |
1da177e4c Linux-2.6.12-rc2 |
625 |
|
ced220703 [JFFS2] semaphore... |
626 |
mutex_lock(&dead_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
627 |
|
32f1a95d5 [JFFS2] Add symli... |
628 629 630 631 |
if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { while (dead_f->dents) { /* There can be only deleted ones */ fd = dead_f->dents; |
182ec4eee [JFFS2] Clean up ... |
632 |
|
32f1a95d5 [JFFS2] Add symli... |
633 |
dead_f->dents = fd->next; |
182ec4eee [JFFS2] Clean up ... |
634 |
|
32f1a95d5 [JFFS2] Add symli... |
635 636 637 638 639 640 641 642 643 |
if (fd->ino) { printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u ", dead_f->inocache->ino, fd->name, fd->ino); } else { D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u ", fd->name, dead_f->inocache->ino)); } |
15953580e [JFFS2] Improve g... |
644 645 |
if (fd->raw) jffs2_mark_node_obsolete(c, fd->raw); |
32f1a95d5 [JFFS2] Add symli... |
646 |
jffs2_free_full_dirent(fd); |
1da177e4c Linux-2.6.12-rc2 |
647 |
} |
27c72b040 [JFFS2] Track par... |
648 649 650 |
dead_f->inocache->pino_nlink = 0; } else dead_f->inocache->pino_nlink--; |
1da177e4c Linux-2.6.12-rc2 |
651 |
/* NB: Caller must set inode nlink if appropriate */ |
ced220703 [JFFS2] semaphore... |
652 |
mutex_unlock(&dead_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
653 654 655 656 657 658 |
} jffs2_complete_reservation(c); return 0; } |
3a69e0cd2 [JFFS2] Fix JFFS2... |
659 |
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, uint32_t time) |
1da177e4c Linux-2.6.12-rc2 |
660 661 662 |
{ struct jffs2_raw_dirent *rd; struct jffs2_full_dirent *fd; |
9fe4854cd [JFFS2] Remove fl... |
663 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
664 665 666 667 668 |
int ret; rd = jffs2_alloc_raw_dirent(); if (!rd) return -ENOMEM; |
9fe4854cd [JFFS2] Remove fl... |
669 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba5 [JFFS2] Add erase... |
670 |
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4c Linux-2.6.12-rc2 |
671 672 673 674 |
if (ret) { jffs2_free_raw_dirent(rd); return ret; } |
182ec4eee [JFFS2] Clean up ... |
675 |
|
ced220703 [JFFS2] semaphore... |
676 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
677 678 679 680 681 682 683 684 685 686 |
/* 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); |
3a69e0cd2 [JFFS2] Fix JFFS2... |
687 |
rd->mctime = cpu_to_je32(time); |
1da177e4c Linux-2.6.12-rc2 |
688 689 690 691 692 693 |
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)); |
9fe4854cd [JFFS2] Remove fl... |
694 |
fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); |
182ec4eee [JFFS2] Clean up ... |
695 |
|
1da177e4c Linux-2.6.12-rc2 |
696 697 698 699 |
jffs2_free_raw_dirent(rd); if (IS_ERR(fd)) { jffs2_complete_reservation(c); |
ced220703 [JFFS2] semaphore... |
700 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
701 702 703 704 705 706 707 |
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); |
ced220703 [JFFS2] semaphore... |
708 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 |
return 0; } |