diff options
| -rw-r--r-- | fs/fuse/dir.c | 183 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 12 | ||||
| -rw-r--r-- | include/linux/fuse.h | 18 |
3 files changed, 213 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 0950455914dd..f127625543b4 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -744,6 +744,177 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, return d_splice_alias(inode, entry); } +static int fuse_setxattr(struct dentry *entry, const char *name, + const void *value, size_t size, int flags) +{ + struct inode *inode = entry->d_inode; + struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_req *req; + struct fuse_setxattr_in inarg; + int err; + + if (size > FUSE_XATTR_SIZE_MAX) + return -E2BIG; + + if (fc->no_setxattr) + return -EOPNOTSUPP; + + req = fuse_get_request(fc); + if (!req) + return -ERESTARTNOINTR; + + memset(&inarg, 0, sizeof(inarg)); + inarg.size = size; + inarg.flags = flags; + req->in.h.opcode = FUSE_SETXATTR; + req->in.h.nodeid = get_node_id(inode); + req->inode = inode; + req->in.numargs = 3; + req->in.args[0].size = sizeof(inarg); + req->in.args[0].value = &inarg; + req->in.args[1].size = strlen(name) + 1; + req->in.args[1].value = name; + req->in.args[2].size = size; + req->in.args[2].value = value; + request_send(fc, req); + err = req->out.h.error; + fuse_put_request(fc, req); + if (err == -ENOSYS) { + fc->no_setxattr = 1; + err = -EOPNOTSUPP; + } + return err; +} + +static ssize_t fuse_getxattr(struct dentry *entry, const char *name, + void *value, size_t size) +{ + struct inode *inode = entry->d_inode; + struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_req *req; + struct fuse_getxattr_in inarg; + struct fuse_getxattr_out outarg; + ssize_t ret; + + if (fc->no_getxattr) + return -EOPNOTSUPP; + + req = fuse_get_request(fc); + if (!req) + return -ERESTARTNOINTR; + + memset(&inarg, 0, sizeof(inarg)); + inarg.size = size; + req->in.h.opcode = FUSE_GETXATTR; + req->in.h.nodeid = get_node_id(inode); + req->inode = inode; + req->in.numargs = 2; + req->in.args[0].size = sizeof(inarg); + req->in.args[0].value = &inarg; + req->in.args[1].size = strlen(name) + 1; + req->in.args[1].value = name; + /* This is really two different operations rolled into one */ + req->out.numargs = 1; + if (size) { + req->out.argvar = 1; + req->out.args[0].size = size; + req->out.args[0].value = value; + } else { + req->out.args[0].size = sizeof(outarg); + req->out.args[0].value = &outarg; + } + request_send(fc, req); + ret = req->out.h.error; + if (!ret) + ret = size ? req->out.args[0].size : outarg.size; + else { + if (ret == -ENOSYS) { + fc->no_getxattr = 1; + ret = -EOPNOTSUPP; + } + } + fuse_put_request(fc, req); + return ret; +} + +static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) +{ + struct inode *inode = entry->d_inode; + struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_req *req; + struct fuse_getxattr_in inarg; + struct fuse_getxattr_out outarg; + ssize_t ret; + + if (fc->no_listxattr) + return -EOPNOTSUPP; + + req = fuse_get_request(fc); + if (!req) + return -ERESTARTNOINTR; + + memset(&inarg, 0, sizeof(inarg)); + inarg.size = size; + req->in.h.opcode = FUSE_LISTXATTR; + req->in.h.nodeid = get_node_id(inode); + req->inode = inode; + req->in.numargs = 1; + req->in.args[0].size = sizeof(inarg); + req->in.args[0].value = &inarg; + /* This is really two different operations rolled into one */ + req->out.numargs = 1; + if (size) { + req->out.argvar = 1; + req->out.args[0].size = size; + req->out.args[0].value = list; + } else { + req->out.args[0].size = sizeof(outarg); + req->out.args[0].value = &outarg; + } + request_send(fc, req); + ret = req->out.h.error; + if (!ret) + ret = size ? req->out.args[0].size : outarg.size; + else { + if (ret == -ENOSYS) { + fc->no_listxattr = 1; + ret = -EOPNOTSUPP; + } + } + fuse_put_request(fc, req); + return ret; +} + +static int fuse_removexattr(struct dentry *entry, const char *name) +{ + struct inode *inode = entry->d_inode; + struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_req *req; + int err; + + if (fc->no_removexattr) + return -EOPNOTSUPP; + + req = fuse_get_request(fc); + if (!req) + return -ERESTARTNOINTR; + + req->in.h.opcode = FUSE_REMOVEXATTR; + req->in.h.nodeid = get_node_id(inode); + req->inode = inode; + req->in.numargs = 1; + req->in.args[0].size = strlen(name) + 1; + req->in.args[0].value = name; + request_send(fc, req); + err = req->out.h.error; + fuse_put_request(fc, req); + if (err == -ENOSYS) { + fc->no_removexattr = 1; + err = -EOPNOTSUPP; + } + return err; +} + static struct inode_operations fuse_dir_inode_operations = { .lookup = fuse_lookup, .mkdir = fuse_mkdir, @@ -757,6 +928,10 @@ static struct inode_operations fuse_dir_inode_operations = { .mknod = fuse_mknod, .permission = fuse_permission, .getattr = fuse_getattr, + .setxattr = fuse_setxattr, + .getxattr = fuse_getxattr, + .listxattr = fuse_listxattr, + .removexattr = fuse_removexattr, }; static struct file_operations fuse_dir_operations = { @@ -771,6 +946,10 @@ static struct inode_operations fuse_common_inode_operations = { .setattr = fuse_setattr, .permission = fuse_permission, .getattr = fuse_getattr, + .setxattr = fuse_setxattr, + .getxattr = fuse_getxattr, + .listxattr = fuse_listxattr, + .removexattr = fuse_removexattr, }; static struct inode_operations fuse_symlink_inode_operations = { @@ -779,6 +958,10 @@ static struct inode_operations fuse_symlink_inode_operations = { .put_link = fuse_put_link, .readlink = generic_readlink, .getattr = fuse_getattr, + .setxattr = fuse_setxattr, + .getxattr = fuse_getxattr, + .listxattr = fuse_listxattr, + .removexattr = fuse_removexattr, }; void fuse_init_common(struct inode *inode) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index c8e6c87496e0..86183c562104 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -245,6 +245,18 @@ struct fuse_conn { /** Is flush not implemented by fs? */ unsigned no_flush : 1; + /** Is setxattr not implemented by fs? */ + unsigned no_setxattr : 1; + + /** Is getxattr not implemented by fs? */ + unsigned no_getxattr : 1; + + /** Is listxattr not implemented by fs? */ + unsigned no_listxattr : 1; + + /** Is removexattr not implemented by fs? */ + unsigned no_removexattr : 1; + /** Backing dev info */ struct backing_dev_info bdi; }; diff --git a/include/linux/fuse.h b/include/linux/fuse.h index 61f34636ffbc..bf564edf9905 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -80,6 +80,10 @@ enum fuse_opcode { FUSE_STATFS = 17, FUSE_RELEASE = 18, FUSE_FSYNC = 20, + FUSE_SETXATTR = 21, + FUSE_GETXATTR = 22, + FUSE_LISTXATTR = 23, + FUSE_REMOVEXATTR = 24, FUSE_FLUSH = 25, FUSE_INIT = 26 }; @@ -89,6 +93,7 @@ enum fuse_opcode { #define FUSE_NAME_MAX 1024 #define FUSE_SYMLINK_MAX 4096 +#define FUSE_XATTR_SIZE_MAX 4096 struct fuse_entry_out { __u64 nodeid; /* Inode ID */ @@ -183,6 +188,19 @@ struct fuse_fsync_in { __u32 fsync_flags; }; +struct fuse_setxattr_in { + __u32 size; + __u32 flags; +}; + +struct fuse_getxattr_in { + __u32 size; +}; + +struct fuse_getxattr_out { + __u32 size; +}; + struct fuse_init_in_out { __u32 major; __u32 minor; |