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fs/jffs2/dir.c
22.6 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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* Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org> |
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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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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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 *, struct dir_context *); |
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|
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static int jffs2_create (struct inode *,struct dentry *,umode_t, |
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bool); |
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static struct dentry *jffs2_lookup (struct inode *,struct dentry *, |
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unsigned int); |
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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 *); |
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static int jffs2_mkdir (struct inode *,struct dentry *,umode_t); |
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static int jffs2_rmdir (struct inode *,struct dentry *); |
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static int jffs2_mknod (struct inode *,struct dentry *,umode_t,dev_t); |
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static int jffs2_rename (struct inode *, struct dentry *, |
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struct inode *, struct dentry *, unsigned int); |
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|
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const struct file_operations jffs2_dir_operations = |
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{ .read = generic_read_dir, |
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.iterate_shared=jffs2_readdir, |
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.unlocked_ioctl=jffs2_ioctl, |
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.fsync = jffs2_fsync, .llseek = generic_file_llseek, |
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}; |
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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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.get_acl = jffs2_get_acl, |
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.set_acl = jffs2_set_acl, |
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.setattr = jffs2_setattr, |
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.listxattr = jffs2_listxattr, |
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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, |
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unsigned int flags) |
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{ struct jffs2_inode_info *dir_f; |
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struct jffs2_full_dirent *fd = NULL, *fd_list; uint32_t ino = 0; struct inode *inode = NULL; |
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unsigned int nhash; |
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|
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jffs2_dbg(1, "jffs2_lookup() "); |
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|
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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); |
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|
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/* The 'nhash' on the fd_list is not the same as the dentry hash */ nhash = full_name_hash(NULL, target->d_name.name, target->d_name.len); |
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mutex_lock(&dir_f->sem); |
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/* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */ |
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for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= nhash; fd_list = fd_list->next) { if (fd_list->nhash == nhash && |
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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; |
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mutex_unlock(&dir_f->sem); |
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if (ino) { |
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inode = jffs2_iget(dir_i->i_sb, ino); |
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if (IS_ERR(inode)) |
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pr_warn("iget() failed for ino #%u ", ino); |
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} |
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return d_splice_alias(inode, target); |
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} /***********************************************************************/ |
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static int jffs2_readdir(struct file *file, struct dir_context *ctx) |
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{ |
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struct inode *inode = file_inode(file); struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); |
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struct jffs2_full_dirent *fd; |
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unsigned long curofs = 1; |
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|
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jffs2_dbg(1, "jffs2_readdir() for dir_i #%lu ", inode->i_ino); |
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|
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if (!dir_emit_dots(file, ctx)) return 0; |
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|
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mutex_lock(&f->sem); |
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for (fd = f->dents; fd; fd = fd->next) { |
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curofs++; |
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/* First loop: curofs = 2; pos = 2 */ if (curofs < ctx->pos) { |
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jffs2_dbg(2, "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld ", |
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fd->name, fd->ino, fd->type, curofs, (unsigned long)ctx->pos); |
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continue; } if (!fd->ino) { |
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jffs2_dbg(2, "Skipping deletion dirent \"%s\" ", fd->name); |
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ctx->pos++; |
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continue; } |
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jffs2_dbg(2, "Dirent %ld: \"%s\", ino #%u, type %d ", |
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(unsigned long)ctx->pos, fd->name, fd->ino, fd->type); if (!dir_emit(ctx, fd->name, strlen(fd->name), fd->ino, fd->type)) |
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break; |
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ctx->pos++; |
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} |
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mutex_unlock(&f->sem); |
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return 0; } /***********************************************************************/ |
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static int jffs2_create(struct inode *dir_i, struct dentry *dentry, |
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umode_t mode, bool excl) |
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{ 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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|
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c = JFFS2_SB_INFO(dir_i->i_sb); |
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jffs2_dbg(1, "%s() ", __func__); |
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|
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inode = jffs2_new_inode(dir_i, mode, ri); |
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if (IS_ERR(inode)) { |
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jffs2_dbg(1, "jffs2_new_inode() failed "); |
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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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/* jffs2_do_create() will want to lock it, _after_ reserving space and taking c-alloc_sem. If we keep it locked here, lockdep gets unhappy (although it's a false positive; nothing else will be looking at this inode yet so there's no chance of AB-BA deadlock involving its f->sem). */ mutex_unlock(&f->sem); |
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ret = jffs2_do_create(c, dir_f, f, ri, &dentry->d_name); |
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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); |
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|
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jffs2_dbg(1, "%s(): Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld ", __func__, inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->pino_nlink, inode->i_mapping->nrpages); |
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|
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d_instantiate_new(dentry, inode); |
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return 0; |
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fail: |
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iget_failed(inode); |
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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); |
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struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(d_inode(dentry)); |
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int ret; |
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uint32_t now = get_seconds(); |
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|
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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) |
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set_nlink(d_inode(dentry), dead_f->inocache->pino_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) { |
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struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_sb); |
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struct jffs2_inode_info *f = JFFS2_INODE_INFO(d_inode(old_dentry)); |
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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; |
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if (d_is_dir(old_dentry)) |
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return -EPERM; /* XXX: This is ugly */ |
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type = (d_inode(old_dentry)->i_mode & S_IFMT) >> 12; |
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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) { |
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mutex_lock(&f->sem); |
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set_nlink(d_inode(old_dentry), ++f->inocache->pino_nlink); |
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mutex_unlock(&f->sem); |
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d_instantiate(dentry, d_inode(old_dentry)); |
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dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
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ihold(d_inode(old_dentry)); |
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} 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 -ENAMETOOLONG; |
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ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
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|
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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; } |
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inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri); |
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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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|
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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 */ |
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mutex_unlock(&f->sem); |
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jffs2_complete_reservation(c); |
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ret = PTR_ERR(fn); goto fail; |
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} |
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|
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/* We use f->target field to store the target path. */ |
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f->target = kmemdup(target, targetlen + 1, GFP_KERNEL); |
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if (!f->target) { |
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pr_warn("Can't allocate %d bytes of memory ", targetlen + 1); |
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mutex_unlock(&f->sem); |
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jffs2_complete_reservation(c); |
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ret = -ENOMEM; goto fail; |
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} |
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inode->i_link = f->target; |
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|
9c261b33a jffs2: Convert mo... |
351 352 353 |
jffs2_dbg(1, "%s(): symlink's target '%s' cached ", __func__, (char *)f->target); |
32f1a95d5 [JFFS2] Add symli... |
354 |
|
182ec4eee [JFFS2] Clean up ... |
355 |
/* No data here. Only a metadata node, which will be |
1da177e4c Linux-2.6.12-rc2 |
356 357 358 |
obsoleted by the first data write */ f->metadata = fn; |
ced220703 [JFFS2] semaphore... |
359 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
360 361 |
jffs2_complete_reservation(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
362 |
|
2a7dba391 fs/vfs/security: ... |
363 |
ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
f324e4cb2 jffs2: Fix in-cor... |
364 365 |
if (ret) goto fail; |
cfc8dc6f6 [JFFS2] Tidy up f... |
366 |
ret = jffs2_init_acl_post(inode); |
f324e4cb2 jffs2: Fix in-cor... |
367 368 |
if (ret) goto fail; |
aa98d7cf5 [JFFS2][XATTR] XA... |
369 |
|
9fe4854cd [JFFS2] Remove fl... |
370 371 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
f324e4cb2 jffs2: Fix in-cor... |
372 373 |
if (ret) goto fail; |
1da177e4c Linux-2.6.12-rc2 |
374 375 376 377 378 |
rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); |
f324e4cb2 jffs2: Fix in-cor... |
379 380 |
ret = -ENOMEM; goto fail; |
1da177e4c Linux-2.6.12-rc2 |
381 382 383 |
} dir_f = JFFS2_INODE_INFO(dir_i); |
ced220703 [JFFS2] semaphore... |
384 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
385 386 387 388 389 390 391 392 393 394 395 396 397 398 |
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)); |
9fe4854cd [JFFS2] Remove fl... |
399 |
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
400 401 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
402 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
403 404 405 |
as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); |
ced220703 [JFFS2] semaphore... |
406 |
mutex_unlock(&dir_f->sem); |
f324e4cb2 jffs2: Fix in-cor... |
407 408 |
ret = PTR_ERR(fd); goto fail; |
1da177e4c Linux-2.6.12-rc2 |
409 410 411 412 413 414 415 416 417 |
} 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); |
ced220703 [JFFS2] semaphore... |
418 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
419 |
jffs2_complete_reservation(c); |
f440ea85d do d_instantiate/... |
420 |
d_instantiate_new(dentry, inode); |
1da177e4c Linux-2.6.12-rc2 |
421 |
return 0; |
f324e4cb2 jffs2: Fix in-cor... |
422 423 |
fail: |
41cce647f jffs2: don't open... |
424 |
iget_failed(inode); |
f324e4cb2 jffs2: Fix in-cor... |
425 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
426 |
} |
18bb1db3e switch vfs_mkdir(... |
427 |
static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, umode_t mode) |
1da177e4c Linux-2.6.12-rc2 |
428 429 430 431 432 433 434 435 436 |
{ 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; |
9fe4854cd [JFFS2] Remove fl... |
437 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
438 439 440 441 442 443 444 |
int ret; mode |= S_IFDIR; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
182ec4eee [JFFS2] Clean up ... |
445 |
|
1da177e4c Linux-2.6.12-rc2 |
446 |
c = JFFS2_SB_INFO(dir_i->i_sb); |
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 |
449 450 |
*/ namelen = dentry->d_name.len; |
9fe4854cd [JFFS2] Remove fl... |
451 452 |
ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
1da177e4c Linux-2.6.12-rc2 |
453 454 455 456 457 |
if (ret) { jffs2_free_raw_inode(ri); return ret; } |
cfc8dc6f6 [JFFS2] Tidy up f... |
458 |
inode = jffs2_new_inode(dir_i, mode, ri); |
1da177e4c Linux-2.6.12-rc2 |
459 460 461 462 463 464 465 466 467 |
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; |
1da177e4c Linux-2.6.12-rc2 |
468 469 |
f = JFFS2_INODE_INFO(inode); |
27c72b040 [JFFS2] Track par... |
470 |
/* Directories get nlink 2 at start */ |
bfe868486 filesystems: add ... |
471 |
set_nlink(inode, 2); |
27c72b040 [JFFS2] Track par... |
472 473 |
/* but ic->pino_nlink is the parent ino# */ f->inocache->pino_nlink = dir_i->i_ino; |
1da177e4c Linux-2.6.12-rc2 |
474 475 |
ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); |
182ec4eee [JFFS2] Clean up ... |
476 |
|
9fe4854cd [JFFS2] Remove fl... |
477 |
fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
478 479 480 481 482 |
jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ |
ced220703 [JFFS2] semaphore... |
483 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
484 |
jffs2_complete_reservation(c); |
f324e4cb2 jffs2: Fix in-cor... |
485 486 |
ret = PTR_ERR(fn); goto fail; |
1da177e4c Linux-2.6.12-rc2 |
487 |
} |
182ec4eee [JFFS2] Clean up ... |
488 |
/* No data here. Only a metadata node, which will be |
1da177e4c Linux-2.6.12-rc2 |
489 490 491 |
obsoleted by the first data write */ f->metadata = fn; |
ced220703 [JFFS2] semaphore... |
492 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
493 494 |
jffs2_complete_reservation(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
495 |
|
2a7dba391 fs/vfs/security: ... |
496 |
ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
f324e4cb2 jffs2: Fix in-cor... |
497 498 |
if (ret) goto fail; |
cfc8dc6f6 [JFFS2] Tidy up f... |
499 |
ret = jffs2_init_acl_post(inode); |
f324e4cb2 jffs2: Fix in-cor... |
500 501 |
if (ret) goto fail; |
aa98d7cf5 [JFFS2][XATTR] XA... |
502 |
|
9fe4854cd [JFFS2] Remove fl... |
503 504 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
f324e4cb2 jffs2: Fix in-cor... |
505 506 |
if (ret) goto fail; |
182ec4eee [JFFS2] Clean up ... |
507 |
|
1da177e4c Linux-2.6.12-rc2 |
508 509 510 511 |
rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); |
f324e4cb2 jffs2: Fix in-cor... |
512 513 |
ret = -ENOMEM; goto fail; |
1da177e4c Linux-2.6.12-rc2 |
514 515 516 |
} dir_f = JFFS2_INODE_INFO(dir_i); |
ced220703 [JFFS2] semaphore... |
517 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
518 519 520 521 522 523 524 525 526 527 528 529 530 531 |
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... |
532 |
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
182ec4eee [JFFS2] Clean up ... |
533 |
|
1da177e4c Linux-2.6.12-rc2 |
534 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
535 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
536 537 538 |
as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); |
ced220703 [JFFS2] semaphore... |
539 |
mutex_unlock(&dir_f->sem); |
f324e4cb2 jffs2: Fix in-cor... |
540 541 |
ret = PTR_ERR(fd); goto fail; |
1da177e4c Linux-2.6.12-rc2 |
542 543 544 |
} dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime)); |
d8c76e6f4 [PATCH] r/o bind ... |
545 |
inc_nlink(dir_i); |
1da177e4c Linux-2.6.12-rc2 |
546 547 548 549 550 551 |
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); |
ced220703 [JFFS2] semaphore... |
552 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
553 |
jffs2_complete_reservation(c); |
f440ea85d do d_instantiate/... |
554 |
d_instantiate_new(dentry, inode); |
1da177e4c Linux-2.6.12-rc2 |
555 |
return 0; |
f324e4cb2 jffs2: Fix in-cor... |
556 557 |
fail: |
41cce647f jffs2: don't open... |
558 |
iget_failed(inode); |
f324e4cb2 jffs2: Fix in-cor... |
559 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
560 561 562 563 |
} static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry) { |
27c72b040 [JFFS2] Track par... |
564 565 |
struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb); struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); |
2b0143b5c VFS: normal files... |
566 |
struct jffs2_inode_info *f = JFFS2_INODE_INFO(d_inode(dentry)); |
1da177e4c Linux-2.6.12-rc2 |
567 568 |
struct jffs2_full_dirent *fd; int ret; |
27c72b040 [JFFS2] Track par... |
569 |
uint32_t now = get_seconds(); |
1da177e4c Linux-2.6.12-rc2 |
570 571 572 573 574 |
for (fd = f->dents ; fd; fd = fd->next) { if (fd->ino) return -ENOTEMPTY; } |
27c72b040 [JFFS2] Track par... |
575 576 577 578 579 |
ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, dentry->d_name.len, f, now); if (!ret) { dir_i->i_mtime = dir_i->i_ctime = ITIME(now); |
2b0143b5c VFS: normal files... |
580 |
clear_nlink(d_inode(dentry)); |
9a53c3a78 [PATCH] r/o bind ... |
581 |
drop_nlink(dir_i); |
27c72b040 [JFFS2] Track par... |
582 |
} |
1da177e4c Linux-2.6.12-rc2 |
583 584 |
return ret; } |
1a67aafb5 switch ->mknod() ... |
585 |
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, umode_t mode, dev_t rdev) |
1da177e4c Linux-2.6.12-rc2 |
586 587 588 589 590 591 592 593 594 |
{ 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... |
595 |
union jffs2_device_node dev; |
1da177e4c Linux-2.6.12-rc2 |
596 |
int devlen = 0; |
9fe4854cd [JFFS2] Remove fl... |
597 |
uint32_t alloclen; |
1da177e4c Linux-2.6.12-rc2 |
598 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
599 600 601 |
ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; |
182ec4eee [JFFS2] Clean up ... |
602 |
|
1da177e4c Linux-2.6.12-rc2 |
603 |
c = JFFS2_SB_INFO(dir_i->i_sb); |
182ec4eee [JFFS2] Clean up ... |
604 |
|
aef9ab478 [JFFS2] Support n... |
605 606 |
if (S_ISBLK(mode) || S_ISCHR(mode)) devlen = jffs2_encode_dev(&dev, rdev); |
182ec4eee [JFFS2] Clean up ... |
607 608 609 |
/* Try to reserve enough space for both node and dirent. * Just the node will do for now, though |
1da177e4c Linux-2.6.12-rc2 |
610 611 |
*/ namelen = dentry->d_name.len; |
9fe4854cd [JFFS2] Remove fl... |
612 |
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen, |
aef9ab478 [JFFS2] Support n... |
613 |
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
1da177e4c Linux-2.6.12-rc2 |
614 615 616 617 618 |
if (ret) { jffs2_free_raw_inode(ri); return ret; } |
cfc8dc6f6 [JFFS2] Tidy up f... |
619 |
inode = jffs2_new_inode(dir_i, mode, ri); |
1da177e4c Linux-2.6.12-rc2 |
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 |
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 ... |
638 |
|
9fe4854cd [JFFS2] Remove fl... |
639 |
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL); |
1da177e4c Linux-2.6.12-rc2 |
640 641 642 643 644 |
jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ |
ced220703 [JFFS2] semaphore... |
645 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
646 |
jffs2_complete_reservation(c); |
f324e4cb2 jffs2: Fix in-cor... |
647 648 |
ret = PTR_ERR(fn); goto fail; |
1da177e4c Linux-2.6.12-rc2 |
649 |
} |
182ec4eee [JFFS2] Clean up ... |
650 |
/* No data here. Only a metadata node, which will be |
1da177e4c Linux-2.6.12-rc2 |
651 652 653 |
obsoleted by the first data write */ f->metadata = fn; |
ced220703 [JFFS2] semaphore... |
654 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
655 656 |
jffs2_complete_reservation(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
657 |
|
2a7dba391 fs/vfs/security: ... |
658 |
ret = jffs2_init_security(inode, dir_i, &dentry->d_name); |
f324e4cb2 jffs2: Fix in-cor... |
659 660 |
if (ret) goto fail; |
cfc8dc6f6 [JFFS2] Tidy up f... |
661 |
ret = jffs2_init_acl_post(inode); |
f324e4cb2 jffs2: Fix in-cor... |
662 663 |
if (ret) goto fail; |
aa98d7cf5 [JFFS2][XATTR] XA... |
664 |
|
9fe4854cd [JFFS2] Remove fl... |
665 666 |
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
f324e4cb2 jffs2: Fix in-cor... |
667 668 |
if (ret) goto fail; |
1da177e4c Linux-2.6.12-rc2 |
669 670 671 672 673 |
rd = jffs2_alloc_raw_dirent(); if (!rd) { /* Argh. Now we treat it like a normal delete */ jffs2_complete_reservation(c); |
f324e4cb2 jffs2: Fix in-cor... |
674 675 |
ret = -ENOMEM; goto fail; |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 |
} dir_f = JFFS2_INODE_INFO(dir_i); |
ced220703 [JFFS2] semaphore... |
679 |
mutex_lock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 |
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... |
697 |
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL); |
182ec4eee [JFFS2] Clean up ... |
698 |
|
1da177e4c Linux-2.6.12-rc2 |
699 |
if (IS_ERR(fd)) { |
182ec4eee [JFFS2] Clean up ... |
700 |
/* dirent failed to write. Delete the inode normally |
1da177e4c Linux-2.6.12-rc2 |
701 702 703 |
as if it were the final unlink() */ jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); |
ced220703 [JFFS2] semaphore... |
704 |
mutex_unlock(&dir_f->sem); |
f324e4cb2 jffs2: Fix in-cor... |
705 706 |
ret = PTR_ERR(fd); goto fail; |
1da177e4c Linux-2.6.12-rc2 |
707 708 709 710 711 712 713 714 715 |
} 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); |
ced220703 [JFFS2] semaphore... |
716 |
mutex_unlock(&dir_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
717 |
jffs2_complete_reservation(c); |
f440ea85d do d_instantiate/... |
718 |
d_instantiate_new(dentry, inode); |
1da177e4c Linux-2.6.12-rc2 |
719 |
return 0; |
f324e4cb2 jffs2: Fix in-cor... |
720 721 |
fail: |
41cce647f jffs2: don't open... |
722 |
iget_failed(inode); |
f324e4cb2 jffs2: Fix in-cor... |
723 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
724 725 726 |
} static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, |
f03b8ad8d fs: support RENAM... |
727 728 |
struct inode *new_dir_i, struct dentry *new_dentry, unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
729 730 731 732 733 |
{ 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... |
734 |
uint32_t now; |
1da177e4c Linux-2.6.12-rc2 |
735 |
|
f03b8ad8d fs: support RENAM... |
736 737 |
if (flags & ~RENAME_NOREPLACE) return -EINVAL; |
182ec4eee [JFFS2] Clean up ... |
738 |
/* The VFS will check for us and prevent trying to rename a |
1da177e4c Linux-2.6.12-rc2 |
739 740 741 742 |
* 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. */ |
2b0143b5c VFS: normal files... |
743 744 |
if (d_really_is_positive(new_dentry)) { victim_f = JFFS2_INODE_INFO(d_inode(new_dentry)); |
e36cb0b89 VFS: (Scripted) C... |
745 |
if (d_is_dir(new_dentry)) { |
1da177e4c Linux-2.6.12-rc2 |
746 |
struct jffs2_full_dirent *fd; |
ced220703 [JFFS2] semaphore... |
747 |
mutex_lock(&victim_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
748 749 |
for (fd = victim_f->dents; fd; fd = fd->next) { if (fd->ino) { |
ced220703 [JFFS2] semaphore... |
750 |
mutex_unlock(&victim_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
751 752 753 |
return -ENOTEMPTY; } } |
ced220703 [JFFS2] semaphore... |
754 |
mutex_unlock(&victim_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
755 756 757 758 |
} } /* XXX: We probably ought to alloc enough space for |
182ec4eee [JFFS2] Clean up ... |
759 |
both nodes at the same time. Writing the new link, |
1da177e4c Linux-2.6.12-rc2 |
760 761 762 763 |
then getting -ENOSPC, is quite bad :) */ /* Make a hard link */ |
182ec4eee [JFFS2] Clean up ... |
764 |
|
1da177e4c Linux-2.6.12-rc2 |
765 |
/* XXX: This is ugly */ |
2b0143b5c VFS: normal files... |
766 |
type = (d_inode(old_dentry)->i_mode & S_IFMT) >> 12; |
1da177e4c Linux-2.6.12-rc2 |
767 |
if (!type) type = DT_REG; |
3a69e0cd2 [JFFS2] Fix JFFS2... |
768 |
now = get_seconds(); |
182ec4eee [JFFS2] Clean up ... |
769 |
ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i), |
2b0143b5c VFS: normal files... |
770 |
d_inode(old_dentry)->i_ino, type, |
3a69e0cd2 [JFFS2] Fix JFFS2... |
771 |
new_dentry->d_name.name, new_dentry->d_name.len, now); |
1da177e4c Linux-2.6.12-rc2 |
772 773 774 775 776 777 |
if (ret) return ret; if (victim_f) { /* There was a victim. Kill it off nicely */ |
e36cb0b89 VFS: (Scripted) C... |
778 |
if (d_is_dir(new_dentry)) |
2b0143b5c VFS: normal files... |
779 |
clear_nlink(d_inode(new_dentry)); |
22ba747f6 jffs2: fix IN_DEL... |
780 |
else |
2b0143b5c VFS: normal files... |
781 |
drop_nlink(d_inode(new_dentry)); |
1da177e4c Linux-2.6.12-rc2 |
782 783 784 |
/* Don't oops if the victim was a dirent pointing to an inode which didn't exist. */ if (victim_f->inocache) { |
ced220703 [JFFS2] semaphore... |
785 |
mutex_lock(&victim_f->sem); |
e36cb0b89 VFS: (Scripted) C... |
786 |
if (d_is_dir(new_dentry)) |
27c72b040 [JFFS2] Track par... |
787 788 789 |
victim_f->inocache->pino_nlink = 0; else victim_f->inocache->pino_nlink--; |
ced220703 [JFFS2] semaphore... |
790 |
mutex_unlock(&victim_f->sem); |
1da177e4c Linux-2.6.12-rc2 |
791 792 |
} } |
182ec4eee [JFFS2] Clean up ... |
793 |
/* If it was a directory we moved, and there was no victim, |
1da177e4c Linux-2.6.12-rc2 |
794 |
increase i_nlink on its new parent */ |
e36cb0b89 VFS: (Scripted) C... |
795 |
if (d_is_dir(old_dentry) && !victim_f) |
d8c76e6f4 [PATCH] r/o bind ... |
796 |
inc_nlink(new_dir_i); |
1da177e4c Linux-2.6.12-rc2 |
797 798 |
/* Unlink the original */ |
182ec4eee [JFFS2] Clean up ... |
799 |
ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i), |
3a69e0cd2 [JFFS2] Fix JFFS2... |
800 |
old_dentry->d_name.name, old_dentry->d_name.len, NULL, now); |
1da177e4c Linux-2.6.12-rc2 |
801 802 803 804 805 |
/* We don't touch inode->i_nlink */ if (ret) { /* Oh shit. We really ought to make a single node which can do both atomically */ |
2b0143b5c VFS: normal files... |
806 |
struct jffs2_inode_info *f = JFFS2_INODE_INFO(d_inode(old_dentry)); |
ced220703 [JFFS2] semaphore... |
807 |
mutex_lock(&f->sem); |
2b0143b5c VFS: normal files... |
808 |
inc_nlink(d_inode(old_dentry)); |
e36cb0b89 VFS: (Scripted) C... |
809 |
if (f->inocache && !d_is_dir(old_dentry)) |
27c72b040 [JFFS2] Track par... |
810 |
f->inocache->pino_nlink++; |
ced220703 [JFFS2] semaphore... |
811 |
mutex_unlock(&f->sem); |
1da177e4c Linux-2.6.12-rc2 |
812 |
|
da320f055 jffs2: Convert pr... |
813 814 815 |
pr_notice("%s(): Link succeeded, unlink failed (err %d). You now have a hard link ", __func__, ret); |
f93812846 jffs2: reduce the... |
816 817 818 819 820 821 822 823 |
/* * We can't keep the target in dcache after that. * For one thing, we can't afford dentry aliases for directories. * For another, if there was a victim, we _can't_ set new inode * for that sucker and we have to trigger mount eviction - the * caller won't do it on its own since we are returning an error. */ d_invalidate(new_dentry); |
3a69e0cd2 [JFFS2] Fix JFFS2... |
824 |
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); |
1da177e4c Linux-2.6.12-rc2 |
825 826 |
return ret; } |
e36cb0b89 VFS: (Scripted) C... |
827 |
if (d_is_dir(old_dentry)) |
9a53c3a78 [PATCH] r/o bind ... |
828 |
drop_nlink(old_dir_i); |
1da177e4c Linux-2.6.12-rc2 |
829 |
|
3a69e0cd2 [JFFS2] Fix JFFS2... |
830 |
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 |
831 832 |
return 0; } |