static int v9fs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { struct super_block *sb = NULL; struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; int mode = S_IRWXUGO | S_ISVTX; struct p9_fid *fid; int retval = 0; P9_DPRINTK(P9_DEBUG_VFS, " \n"); v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) return -ENOMEM; fid = v9fs_session_init(v9ses, dev_name, data); if (IS_ERR(fid)) { retval = PTR_ERR(fid); /* * we need to call session_close to tear down some * of the data structure setup by session_init */ goto close_session; } sb = sget(fs_type, NULL, v9fs_set_super, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); goto clunk_fid; } v9fs_fill_super(sb, v9ses, flags, data); inode = v9fs_get_inode(sb, S_IFDIR | mode); if (IS_ERR(inode)) { retval = PTR_ERR(inode); goto release_sb; } root = d_alloc_root(inode); if (!root) { iput(inode); retval = -ENOMEM; goto release_sb; } sb->s_root = root; if (v9fs_proto_dotl(v9ses)) { struct p9_stat_dotl *st = NULL; st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); if (IS_ERR(st)) { retval = PTR_ERR(st); goto release_sb; } v9fs_stat2inode_dotl(st, root->d_inode); kfree(st); } else { struct p9_wstat *st = NULL; st = p9_client_stat(fid); if (IS_ERR(st)) { retval = PTR_ERR(st); goto release_sb; } root->d_inode->i_ino = v9fs_qid2ino(&st->qid); v9fs_stat2inode(st, root->d_inode, sb); p9stat_free(st); kfree(st); } retval = v9fs_get_acl(inode, fid); if (retval) goto release_sb; v9fs_fid_add(root, fid); P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n"); simple_set_mnt(mnt, sb); return 0; clunk_fid: p9_client_clunk(fid); close_session: v9fs_session_close(v9ses); kfree(v9ses); return retval; release_sb: /* * we will do the session_close and root dentry release * in the below call. But we need to clunk fid, because we haven't * attached the fid to dentry so it won't get clunked * automatically. */ p9_client_clunk(fid); deactivate_locked_super(sb); return retval; }
static int v9fs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { struct super_block *sb = NULL; struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; struct p9_stat *st = NULL; int mode = S_IRWXUGO | S_ISVTX; uid_t uid = current->fsuid; gid_t gid = current->fsgid; struct p9_fid *fid; int retval = 0; P9_DPRINTK(P9_DEBUG_VFS, " \n"); st = NULL; v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) return -ENOMEM; fid = v9fs_session_init(v9ses, dev_name, data); if (IS_ERR(fid)) { retval = PTR_ERR(fid); fid = NULL; kfree(v9ses); v9ses = NULL; goto error; } st = p9_client_stat(fid); if (IS_ERR(st)) { retval = PTR_ERR(st); goto error; } sb = sget(fs_type, NULL, v9fs_set_super, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); goto error; } v9fs_fill_super(sb, v9ses, flags); inode = v9fs_get_inode(sb, S_IFDIR | mode); if (IS_ERR(inode)) { retval = PTR_ERR(inode); goto error; } inode->i_uid = uid; inode->i_gid = gid; root = d_alloc_root(inode); if (!root) { retval = -ENOMEM; goto error; } sb->s_root = root; root->d_inode->i_ino = v9fs_qid2ino(&st->qid); v9fs_stat2inode(st, root->d_inode, sb); v9fs_fid_add(root, fid); kfree(st); return simple_set_mnt(mnt, sb); error: kfree(st); if (fid) p9_client_clunk(fid); if (v9ses) { v9fs_session_close(v9ses); kfree(v9ses); } if (sb) { up_write(&sb->s_umount); deactivate_super(sb); } return retval; }
static int v9fs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { struct super_block *sb = NULL; struct v9fs_fcall *fcall = NULL; struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; struct v9fs_fid *root_fid = NULL; int mode = S_IRWXUGO | S_ISVTX; uid_t uid = current->fsuid; gid_t gid = current->fsgid; int stat_result = 0; int newfid = 0; int retval = 0; dprintk(DEBUG_VFS, " \n"); v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) return -ENOMEM; if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) { dprintk(DEBUG_ERROR, "problem initiating session\n"); retval = newfid; goto out_free_session; } sb = sget(fs_type, NULL, v9fs_set_super, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); goto out_close_session; } v9fs_fill_super(sb, v9ses, flags); inode = v9fs_get_inode(sb, S_IFDIR | mode); if (IS_ERR(inode)) { retval = PTR_ERR(inode); goto put_back_sb; } inode->i_uid = uid; inode->i_gid = gid; root = d_alloc_root(inode); if (!root) { retval = -ENOMEM; goto put_back_sb; } sb->s_root = root; stat_result = v9fs_t_stat(v9ses, newfid, &fcall); if (stat_result < 0) { dprintk(DEBUG_ERROR, "stat error\n"); v9fs_t_clunk(v9ses, newfid); } else { /* Setup the Root Inode */ root_fid = v9fs_fid_create(v9ses, newfid); if (root_fid == NULL) { retval = -ENOMEM; goto put_back_sb; } retval = v9fs_fid_insert(root_fid, root); if (retval < 0) { kfree(fcall); goto put_back_sb; } root_fid->qid = fcall->params.rstat.stat.qid; root->d_inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb); } kfree(fcall); if (stat_result < 0) { retval = stat_result; goto put_back_sb; } return simple_set_mnt(mnt, sb); out_close_session: v9fs_session_close(v9ses); out_free_session: kfree(v9ses); return retval; put_back_sb: /* deactivate_super calls v9fs_kill_super which will frees the rest */ up_write(&sb->s_umount); deactivate_super(sb); return retval; }
static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { struct super_block *sb = NULL; struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; umode_t mode = S_IRWXUGO | S_ISVTX; struct p9_fid *fid; int retval = 0; p9_debug(P9_DEBUG_VFS, "\n"); v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) return ERR_PTR(-ENOMEM); fid = v9fs_session_init(v9ses, dev_name, data); if (IS_ERR(fid)) { retval = PTR_ERR(fid); goto free_session; } sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); goto clunk_fid; } v9fs_fill_super(sb, v9ses, flags, data); if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) sb->s_d_op = &v9fs_cached_dentry_operations; else sb->s_d_op = &v9fs_dentry_operations; inode = v9fs_get_inode(sb, S_IFDIR | mode, 0); if (IS_ERR(inode)) { retval = PTR_ERR(inode); goto release_sb; } root = d_make_root(inode); if (!root) { retval = -ENOMEM; goto release_sb; } sb->s_root = root; if (v9fs_proto_dotl(v9ses)) { struct p9_stat_dotl *st = NULL; st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); if (IS_ERR(st)) { retval = PTR_ERR(st); goto release_sb; } d_inode(root)->i_ino = v9fs_qid2ino(&st->qid); v9fs_stat2inode_dotl(st, d_inode(root)); kfree(st); } else { struct p9_wstat *st = NULL; st = p9_client_stat(fid); if (IS_ERR(st)) { retval = PTR_ERR(st); goto release_sb; } d_inode(root)->i_ino = v9fs_qid2ino(&st->qid); v9fs_stat2inode(st, d_inode(root), sb); p9stat_free(st); kfree(st); } retval = v9fs_get_acl(inode, fid); if (retval) goto release_sb; v9fs_fid_add(root, fid); p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n"); return dget(sb->s_root); clunk_fid: p9_client_clunk(fid); v9fs_session_close(v9ses); free_session: kfree(v9ses); return ERR_PTR(retval); release_sb: /* * we will do the session_close and root dentry release * in the below call. But we need to clunk fid, because we haven't * attached the fid to dentry so it won't get clunked * automatically. */ p9_client_clunk(fid); deactivate_locked_super(sb); return ERR_PTR(retval); }
/** * v9fs_vfs_mknod_dotl - create a special file * @dir: inode destination for new link * @dentry: dentry for file * @mode: mode for creation * @rdev: device associated with special file * */ static int v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, dev_t rdev) { int err; gid_t gid; char *name; mode_t mode; struct v9fs_session_info *v9ses; struct p9_fid *fid = NULL, *dfid = NULL; struct inode *inode; struct p9_qid qid; struct dentry *dir_dentry; struct posix_acl *dacl = NULL, *pacl = NULL; P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); if (!new_valid_dev(rdev)) return -EINVAL; v9ses = v9fs_inode2v9ses(dir); dir_dentry = v9fs_dentry_from_dir_inode(dir); dfid = v9fs_fid_lookup(dir_dentry); if (IS_ERR(dfid)) { err = PTR_ERR(dfid); P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); dfid = NULL; goto error; } gid = v9fs_get_fsgid_for_create(dir); mode = omode; /* Update mode based on ACL value */ err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); if (err) { P9_DPRINTK(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n", err); goto error; } name = (char *) dentry->d_name.name; err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); if (err < 0) goto error; v9fs_invalidate_inode_attr(dir); /* instantiate inode and assign the unopened fid to the dentry */ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { fid = p9_client_walk(dfid, 1, &name, 1); if (IS_ERR(fid)) { err = PTR_ERR(fid); P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); fid = NULL; goto error; } inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } d_instantiate(dentry, inode); err = v9fs_fid_add(dentry, fid); if (err < 0) goto error; fid = NULL; } else { /* * Not in cached mode. No need to populate inode with stat. * socket syscall returns a fd, so we need instantiate */ inode = v9fs_get_inode(dir->i_sb, mode); if (IS_ERR(inode)) { err = PTR_ERR(inode); goto error; } d_instantiate(dentry, inode); } /* Now set the ACL based on the default value */ v9fs_set_create_acl(dentry, dacl, pacl); error: if (fid) p9_client_clunk(fid); return err; }
static int v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, const char *symname) { int err; gid_t gid; char *name; struct p9_qid qid; struct inode *inode; struct p9_fid *dfid; struct p9_fid *fid = NULL; struct v9fs_session_info *v9ses; name = (char *) dentry->d_name.name; P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", dir->i_ino, name, symname); v9ses = v9fs_inode2v9ses(dir); dfid = v9fs_fid_lookup(dentry->d_parent); if (IS_ERR(dfid)) { err = PTR_ERR(dfid); P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); return err; } gid = v9fs_get_fsgid_for_create(dir); /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); if (err < 0) { P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); goto error; } v9fs_invalidate_inode_attr(dir); if (v9ses->cache) { /* Now walk from the parent so we can get an unopened fid. */ fid = p9_client_walk(dfid, 1, &name, 1); if (IS_ERR(fid)) { err = PTR_ERR(fid); P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); fid = NULL; goto error; } /* instantiate inode and assign the unopened fid to dentry */ inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } d_instantiate(dentry, inode); err = v9fs_fid_add(dentry, fid); if (err < 0) goto error; fid = NULL; } else { /* Not in cached mode. No need to populate inode with stat */ inode = v9fs_get_inode(dir->i_sb, S_IFLNK); if (IS_ERR(inode)) { err = PTR_ERR(inode); goto error; } d_instantiate(dentry, inode); } error: if (fid) p9_client_clunk(fid); return err; }
static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, int omode) { int err; struct v9fs_session_info *v9ses; struct p9_fid *fid = NULL, *dfid = NULL; gid_t gid; char *name; mode_t mode; struct inode *inode; struct p9_qid qid; struct dentry *dir_dentry; struct posix_acl *dacl = NULL, *pacl = NULL; P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); err = 0; v9ses = v9fs_inode2v9ses(dir); omode |= S_IFDIR; if (dir->i_mode & S_ISGID) omode |= S_ISGID; dir_dentry = v9fs_dentry_from_dir_inode(dir); dfid = v9fs_fid_lookup(dir_dentry); if (IS_ERR(dfid)) { err = PTR_ERR(dfid); P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); dfid = NULL; goto error; } gid = v9fs_get_fsgid_for_create(dir); mode = omode; /* Update mode based on ACL value */ err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); if (err) { P9_DPRINTK(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n", err); goto error; } name = (char *) dentry->d_name.name; err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); if (err < 0) goto error; /* instantiate inode and assign the unopened fid to the dentry */ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { fid = p9_client_walk(dfid, 1, &name, 1); if (IS_ERR(fid)) { err = PTR_ERR(fid); P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); fid = NULL; goto error; } inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } d_instantiate(dentry, inode); err = v9fs_fid_add(dentry, fid); if (err < 0) goto error; fid = NULL; } else { /* * Not in cached mode. No need to populate * inode with stat. We need to get an inode * so that we can set the acl with dentry */ inode = v9fs_get_inode(dir->i_sb, mode); if (IS_ERR(inode)) { err = PTR_ERR(inode); goto error; } d_instantiate(dentry, inode); } /* Now set the ACL based on the default value */ v9fs_set_create_acl(dentry, dacl, pacl); inc_nlink(dir); v9fs_invalidate_inode_attr(dir); error: if (fid) p9_client_clunk(fid); return err; }