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fs/jffs2/dir.c
22.2 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/slab.h> |
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#include <linux/fs.h> #include <linux/crc32.h> #include <linux/jffs2.h> |
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#include "jffs2_fs_i.h" #include "jffs2_fs_sb.h" |
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#include <linux/time.h> #include "nodelist.h" |
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static int jffs2_readdir (struct file *, void *, filldir_t); static int jffs2_create (struct inode *,struct dentry *,int, struct nameidata *); static struct dentry *jffs2_lookup (struct inode *,struct dentry *, struct nameidata *); static int jffs2_link (struct dentry *,struct inode *,struct dentry *); static int jffs2_unlink (struct inode *,struct dentry *); static int jffs2_symlink (struct inode *,struct dentry *,const char *); static int jffs2_mkdir (struct inode *,struct dentry *,int); static int jffs2_rmdir (struct inode *,struct dentry *); |
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static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t); |
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static int jffs2_rename (struct inode *, struct dentry *, struct inode *, struct dentry *); |
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const struct file_operations jffs2_dir_operations = |
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{ .read = generic_read_dir, .readdir = jffs2_readdir, .ioctl = jffs2_ioctl, .fsync = jffs2_fsync }; |
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const struct inode_operations jffs2_dir_inode_operations = |
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{ |
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.create = jffs2_create, .lookup = jffs2_lookup, |
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.link = jffs2_link, .unlink = jffs2_unlink, .symlink = jffs2_symlink, .mkdir = jffs2_mkdir, .rmdir = jffs2_rmdir, .mknod = jffs2_mknod, .rename = jffs2_rename, |
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.permission = jffs2_permission, |
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.setattr = jffs2_setattr, |
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.setxattr = jffs2_setxattr, .getxattr = jffs2_getxattr, .listxattr = jffs2_listxattr, .removexattr = jffs2_removexattr |
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}; /***********************************************************************/ /* We keep the dirent list sorted in increasing order of name hash, |
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and we use the same hash function as the dentries. Makes this |
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nice and simple */ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target, struct nameidata *nd) { struct jffs2_inode_info *dir_f; struct jffs2_sb_info *c; struct jffs2_full_dirent *fd = NULL, *fd_list; uint32_t ino = 0; struct inode *inode = NULL; D1(printk(KERN_DEBUG "jffs2_lookup() ")); |
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if (target->d_name.len > JFFS2_MAX_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); |
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dir_f = JFFS2_INODE_INFO(dir_i); c = JFFS2_SB_INFO(dir_i->i_sb); down(&dir_f->sem); /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */ for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) { |
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if (fd_list->nhash == target->d_name.hash && |
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(!fd || fd_list->version > fd->version) && strlen(fd_list->name) == target->d_name.len && !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) { fd = fd_list; } } if (fd) ino = fd->ino; up(&dir_f->sem); if (ino) { inode = iget(dir_i->i_sb, ino); if (!inode) { printk(KERN_WARNING "iget() failed for ino #%u ", ino); return (ERR_PTR(-EIO)); } } d_add(target, inode); return NULL; } /***********************************************************************/ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir) { struct jffs2_inode_info *f; struct jffs2_sb_info *c; |
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struct inode *inode = filp->f_path.dentry->d_inode; |
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struct jffs2_full_dirent *fd; unsigned long offset, curofs; |
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D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu ", filp->f_path.dentry->d_inode->i_ino)); |
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f = JFFS2_INODE_INFO(inode); c = JFFS2_SB_INFO(inode->i_sb); offset = filp->f_pos; if (offset == 0) { D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu ", inode->i_ino)); if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0) goto out; offset++; } if (offset == 1) { |
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unsigned long pino = parent_ino(filp->f_path.dentry); |
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D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu ", pino)); if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0) goto out; offset++; } curofs=1; down(&f->sem); for (fd = f->dents; fd; fd = fd->next) { curofs++; /* First loop: curofs = 2; offset = 2 */ if (curofs < offset) { |
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D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld ", |
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fd->name, fd->ino, fd->type, curofs, offset)); continue; } if (!fd->ino) { D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\" ", fd->name)); offset++; continue; } D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d ", offset, fd->name, fd->ino, fd->type)); if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0) break; offset++; } up(&f->sem); out: filp->f_pos = offset; return 0; } /***********************************************************************/ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, struct nameidata *nd) { struct jffs2_raw_inode *ri; struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; int ret; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
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c = JFFS2_SB_INFO(dir_i->i_sb); D1(printk(KERN_DEBUG "jffs2_create() ")); inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { D1(printk(KERN_DEBUG "jffs2_new_inode() failed ")); jffs2_free_raw_inode(ri); return PTR_ERR(inode); } inode->i_op = &jffs2_file_inode_operations; inode->i_fop = &jffs2_file_operations; inode->i_mapping->a_ops = &jffs2_file_address_operations; inode->i_mapping->nrpages = 0; f = JFFS2_INODE_INFO(inode); dir_f = JFFS2_INODE_INFO(dir_i); |
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ret = jffs2_do_create(c, dir_f, f, ri, |
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dentry->d_name.name, dentry->d_name.len); |
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if (ret) goto fail; ret = jffs2_init_security(inode, dir_i); if (ret) goto fail; ret = jffs2_init_acl(inode, dir_i); if (ret) goto fail; |
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dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime)); jffs2_free_raw_inode(ri); d_instantiate(dentry, inode); D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld ", inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages)); return 0; |
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fail: make_bad_inode(inode); iput(inode); jffs2_free_raw_inode(ri); return ret; |
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} /***********************************************************************/ static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry) { struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb); struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode); int ret; |
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uint32_t now = get_seconds(); |
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ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, |
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dentry->d_name.len, dead_f, now); |
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if (dead_f->inocache) dentry->d_inode->i_nlink = dead_f->inocache->nlink; |
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if (!ret) dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
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return ret; } /***********************************************************************/ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry) { struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb); struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode); struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); int ret; uint8_t type; |
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uint32_t now; |
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/* Don't let people make hard links to bad inodes. */ if (!f->inocache) return -EIO; if (S_ISDIR(old_dentry->d_inode->i_mode)) return -EPERM; /* XXX: This is ugly */ type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12; if (!type) type = DT_REG; |
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now = get_seconds(); ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now); |
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if (!ret) { down(&f->sem); old_dentry->d_inode->i_nlink = ++f->inocache->nlink; up(&f->sem); d_instantiate(dentry, old_dentry->d_inode); |
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dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
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atomic_inc(&old_dentry->d_inode->i_count); } return ret; } /***********************************************************************/ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target) { struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; struct jffs2_raw_inode *ri; struct jffs2_raw_dirent *rd; struct jffs2_full_dnode *fn; struct jffs2_full_dirent *fd; int namelen; |
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uint32_t alloclen; |
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int ret, targetlen = strlen(target); |
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/* FIXME: If you care. We'd need to use frags for the target if it grows much more than this */ |
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if (targetlen > 254) |
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return -EINVAL; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
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c = JFFS2_SB_INFO(dir_i->i_sb); |
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/* Try to reserve enough space for both node and dirent. * Just the node will do for now, though |
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*/ namelen = dentry->d_name.len; |
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ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
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if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_symlink_inode_operations; f = JFFS2_INODE_INFO(inode); |
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inode->i_size = targetlen; |
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ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size); ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size); ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); ri->compr = JFFS2_COMPR_NONE; |
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ri->data_crc = cpu_to_je32(crc32(0, target, targetlen)); |
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ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
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fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL); |
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jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } |
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/* We use f->target field to store the target path. */ f->target = kmalloc(targetlen + 1, GFP_KERNEL); if (!f->target) { |
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printk(KERN_WARNING "Can't allocate %d bytes of memory ", targetlen + 1); up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return -ENOMEM; } |
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memcpy(f->target, target, targetlen + 1); D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached ", (char *)f->target)); |
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/* No data here. Only a metadata node, which will be |
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obsoleted by the first data write */ f->metadata = fn; up(&f->sem); jffs2_complete_reservation(c); |
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ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } |
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ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
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if (ret) { /* Eep. */ jffs2_clear_inode(inode); return ret; } rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); jffs2_clear_inode(inode); return -ENOMEM; } dir_f = JFFS2_INODE_INFO(dir_i); 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_i->i_ino); rd->version = cpu_to_je32(++dir_f->highest_version); rd->ino = cpu_to_je32(inode->i_ino); rd->mctime = cpu_to_je32(get_seconds()); rd->nsize = namelen; rd->type = DT_LNK; rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
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fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
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if (IS_ERR(fd)) { |
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/* dirent failed to write. Delete the inode normally |
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as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); up(&dir_f->sem); jffs2_clear_inode(inode); return PTR_ERR(fd); } dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); jffs2_free_raw_dirent(rd); /* Link the fd into the inode's list, obsoleting an old one if necessary. */ jffs2_add_fd_to_list(c, fd, &dir_f->dents); up(&dir_f->sem); jffs2_complete_reservation(c); d_instantiate(dentry, inode); return 0; } static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) { struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; struct jffs2_raw_inode *ri; struct jffs2_raw_dirent *rd; struct jffs2_full_dnode *fn; struct jffs2_full_dirent *fd; int namelen; |
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uint32_t alloclen; |
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int ret; mode |= S_IFDIR; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
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c = JFFS2_SB_INFO(dir_i->i_sb); |
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/* Try to reserve enough space for both node and dirent. * Just the node will do for now, though |
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*/ namelen = dentry->d_name.len; |
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ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
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if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_dir_inode_operations; inode->i_fop = &jffs2_dir_operations; /* Directories get nlink 2 at start */ inode->i_nlink = 2; f = JFFS2_INODE_INFO(inode); ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
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fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
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jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } |
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/* No data here. Only a metadata node, which will be |
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obsoleted by the first data write */ f->metadata = fn; up(&f->sem); jffs2_complete_reservation(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
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ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } |
9fe4854cd [JFFS2] Remove fl... |
539 540 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4c Linux-2.6.12-rc2 |
541 542 543 544 545 |
if (ret) { /* Eep. */ jffs2_clear_inode(inode); return ret; } |
182ec4eee [JFFS2] Clean up ... |
546 |
|
1da177e4c Linux-2.6.12-rc2 |
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 |
rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); jffs2_clear_inode(inode); return -ENOMEM; } dir_f = JFFS2_INODE_INFO(dir_i); 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_i->i_ino); rd->version = cpu_to_je32(++dir_f->highest_version); rd->ino = cpu_to_je32(inode->i_ino); rd->mctime = cpu_to_je32(get_seconds()); rd->nsize = namelen; rd->type = DT_DIR; rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
9fe4854cd [JFFS2] Remove fl... |
571 |
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
182ec4eee [JFFS2] Clean up ... |
572 |
|
1da177e4c Linux-2.6.12-rc2 |
573 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
574 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
575 576 577 578 579 580 581 582 583 |
as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); up(&dir_f->sem); jffs2_clear_inode(inode); return PTR_ERR(fd); } dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); |
d8c76e6f4 [PATCH] r/o bind ... |
584 |
inc_nlink(dir_i); |
1da177e4c Linux-2.6.12-rc2 |
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 |
jffs2_free_raw_dirent(rd); /* Link the fd into the inode's list, obsoleting an old one if necessary. */ jffs2_add_fd_to_list(c, fd, &dir_f->dents); up(&dir_f->sem); jffs2_complete_reservation(c); d_instantiate(dentry, inode); return 0; } static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry) { struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode); struct jffs2_full_dirent *fd; int ret; for (fd = f->dents ; fd; fd = fd->next) { if (fd->ino) return -ENOTEMPTY; } ret = jffs2_unlink(dir_i, dentry); if (!ret) |
9a53c3a78 [PATCH] r/o bind ... |
611 |
drop_nlink(dir_i); |
1da177e4c Linux-2.6.12-rc2 |
612 613 |
return ret; } |
265489f01 [JFFS2] Remove co... |
614 |
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev) |
1da177e4c Linux-2.6.12-rc2 |
615 616 617 618 619 620 621 622 623 |
{ struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; struct jffs2_raw_inode *ri; struct jffs2_raw_dirent *rd; struct jffs2_full_dnode *fn; struct jffs2_full_dirent *fd; int namelen; |
aef9ab478 [JFFS2] Support n... |
624 |
union jffs2_device_node dev; |
1da177e4c Linux-2.6.12-rc2 |
625 |
int devlen = 0; |
9fe4854cd [JFFS2] Remove fl... |
626 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
627 |
int ret; |
aef9ab478 [JFFS2] Support n... |
628 |
if (!new_valid_dev(rdev)) |
1da177e4c Linux-2.6.12-rc2 |
629 630 631 632 633 |
return -EINVAL; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
182ec4eee [JFFS2] Clean up ... |
634 |
|
1da177e4c Linux-2.6.12-rc2 |
635 |
c = JFFS2_SB_INFO(dir_i->i_sb); |
182ec4eee [JFFS2] Clean up ... |
636 |
|
aef9ab478 [JFFS2] Support n... |
637 638 |
if (S_ISBLK(mode) || S_ISCHR(mode)) devlen = jffs2_encode_dev(&dev, rdev); |
182ec4eee [JFFS2] Clean up ... |
639 640 641 |
/* Try to reserve enough space for both node and dirent. * Just the node will do for now, though |
1da177e4c Linux-2.6.12-rc2 |
642 643 |
*/ namelen = dentry->d_name.len; |
9fe4854cd [JFFS2] Remove fl... |
644 |
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen, |
aef9ab478 [JFFS2] Support n... |
645 |
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
1da177e4c Linux-2.6.12-rc2 |
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 |
if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_file_inode_operations; init_special_inode(inode, inode->i_mode, rdev); f = JFFS2_INODE_INFO(inode); ri->dsize = ri->csize = cpu_to_je32(devlen); ri->totlen = cpu_to_je32(sizeof(*ri) + devlen); ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); ri->compr = JFFS2_COMPR_NONE; ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen)); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
182ec4eee [JFFS2] Clean up ... |
671 |
|
9fe4854cd [JFFS2] Remove fl... |
672 |
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
673 674 675 676 677 678 679 680 681 682 |
jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } |
182ec4eee [JFFS2] Clean up ... |
683 |
/* No data here. Only a metadata node, which will be |
1da177e4c Linux-2.6.12-rc2 |
684 685 686 687 688 689 |
obsoleted by the first data write */ f->metadata = fn; up(&f->sem); jffs2_complete_reservation(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
690 691 692 693 694 695 696 697 698 699 700 |
ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } |
9fe4854cd [JFFS2] Remove fl... |
701 702 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4c Linux-2.6.12-rc2 |
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 |
if (ret) { /* Eep. */ jffs2_clear_inode(inode); return ret; } rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); jffs2_clear_inode(inode); return -ENOMEM; } dir_f = JFFS2_INODE_INFO(dir_i); 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_i->i_ino); rd->version = cpu_to_je32(++dir_f->highest_version); rd->ino = cpu_to_je32(inode->i_ino); rd->mctime = cpu_to_je32(get_seconds()); rd->nsize = namelen; /* XXX: This is ugly. */ rd->type = (mode & S_IFMT) >> 12; rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen)); |
9fe4854cd [JFFS2] Remove fl... |
736 |
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
182ec4eee [JFFS2] Clean up ... |
737 |
|
1da177e4c Linux-2.6.12-rc2 |
738 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
739 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 |
as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); up(&dir_f->sem); jffs2_clear_inode(inode); return PTR_ERR(fd); } dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); jffs2_free_raw_dirent(rd); /* Link the fd into the inode's list, obsoleting an old one if necessary. */ jffs2_add_fd_to_list(c, fd, &dir_f->dents); up(&dir_f->sem); jffs2_complete_reservation(c); d_instantiate(dentry, inode); return 0; } static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, struct inode *new_dir_i, struct dentry *new_dentry) { int ret; struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb); struct jffs2_inode_info *victim_f = NULL; uint8_t type; |
3a69e0cd2 [JFFS2] Fix JFFS2... |
771 |
uint32_t now; |
1da177e4c Linux-2.6.12-rc2 |
772 |
|
182ec4eee [JFFS2] Clean up ... |
773 |
/* The VFS will check for us and prevent trying to rename a |
1da177e4c Linux-2.6.12-rc2 |
774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 |
* file over a directory and vice versa, but if it's a directory, * the VFS can't check whether the victim is empty. The filesystem * needs to do that for itself. */ if (new_dentry->d_inode) { victim_f = JFFS2_INODE_INFO(new_dentry->d_inode); if (S_ISDIR(new_dentry->d_inode->i_mode)) { struct jffs2_full_dirent *fd; down(&victim_f->sem); for (fd = victim_f->dents; fd; fd = fd->next) { if (fd->ino) { up(&victim_f->sem); return -ENOTEMPTY; } } up(&victim_f->sem); } } /* XXX: We probably ought to alloc enough space for |
182ec4eee [JFFS2] Clean up ... |
795 |
both nodes at the same time. Writing the new link, |
1da177e4c Linux-2.6.12-rc2 |
796 797 798 799 |
then getting -ENOSPC, is quite bad :) */ /* Make a hard link */ |
182ec4eee [JFFS2] Clean up ... |
800 |
|
1da177e4c Linux-2.6.12-rc2 |
801 802 803 |
/* XXX: This is ugly */ type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12; if (!type) type = DT_REG; |
3a69e0cd2 [JFFS2] Fix JFFS2... |
804 |
now = get_seconds(); |
182ec4eee [JFFS2] Clean up ... |
805 |
ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i), |
1da177e4c Linux-2.6.12-rc2 |
806 |
old_dentry->d_inode->i_ino, type, |
3a69e0cd2 [JFFS2] Fix JFFS2... |
807 |
new_dentry->d_name.name, new_dentry->d_name.len, now); |
1da177e4c Linux-2.6.12-rc2 |
808 809 810 811 812 813 |
if (ret) return ret; if (victim_f) { /* There was a victim. Kill it off nicely */ |
9a53c3a78 [PATCH] r/o bind ... |
814 |
drop_nlink(new_dentry->d_inode); |
1da177e4c Linux-2.6.12-rc2 |
815 816 817 818 819 820 821 822 |
/* Don't oops if the victim was a dirent pointing to an inode which didn't exist. */ if (victim_f->inocache) { down(&victim_f->sem); victim_f->inocache->nlink--; up(&victim_f->sem); } } |
182ec4eee [JFFS2] Clean up ... |
823 |
/* If it was a directory we moved, and there was no victim, |
1da177e4c Linux-2.6.12-rc2 |
824 825 |
increase i_nlink on its new parent */ if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f) |
d8c76e6f4 [PATCH] r/o bind ... |
826 |
inc_nlink(new_dir_i); |
1da177e4c Linux-2.6.12-rc2 |
827 828 |
/* Unlink the original */ |
182ec4eee [JFFS2] Clean up ... |
829 |
ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i), |
3a69e0cd2 [JFFS2] Fix JFFS2... |
830 |
old_dentry->d_name.name, old_dentry->d_name.len, NULL, now); |
1da177e4c Linux-2.6.12-rc2 |
831 832 833 834 835 836 837 |
/* We don't touch inode->i_nlink */ if (ret) { /* Oh shit. We really ought to make a single node which can do both atomically */ struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode); down(&f->sem); |
d8c76e6f4 [PATCH] r/o bind ... |
838 |
inc_nlink(old_dentry->d_inode); |
1da177e4c Linux-2.6.12-rc2 |
839 840 841 842 843 844 845 846 847 |
if (f->inocache) f->inocache->nlink++; up(&f->sem); printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link ", ret); /* Might as well let the VFS know */ d_instantiate(new_dentry, old_dentry->d_inode); atomic_inc(&old_dentry->d_inode->i_count); |
3a69e0cd2 [JFFS2] Fix JFFS2... |
848 |
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); |
1da177e4c Linux-2.6.12-rc2 |
849 850 851 852 |
return ret; } if (S_ISDIR(old_dentry->d_inode->i_mode)) |
9a53c3a78 [PATCH] r/o bind ... |
853 |
drop_nlink(old_dir_i); |
1da177e4c Linux-2.6.12-rc2 |
854 |
|
3a69e0cd2 [JFFS2] Fix JFFS2... |
855 |
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now); |
1da177e4c Linux-2.6.12-rc2 |
856 857 |
return 0; } |