diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fuse/control.c | 20 | ||||
| -rw-r--r-- | fs/fuse/cuse.c | 21 | ||||
| -rw-r--r-- | fs/fuse/dax.c | 10 | ||||
| -rw-r--r-- | fs/fuse/dev.c | 106 | ||||
| -rw-r--r-- | fs/fuse/dir.c | 110 | ||||
| -rw-r--r-- | fs/fuse/file.c | 208 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 128 | ||||
| -rw-r--r-- | fs/fuse/inode.c | 170 | ||||
| -rw-r--r-- | fs/fuse/readdir.c | 10 | ||||
| -rw-r--r-- | fs/fuse/virtio_fs.c | 67 | ||||
| -rw-r--r-- | fs/fuse/xattr.c | 34 |
11 files changed, 526 insertions, 358 deletions
diff --git a/fs/fuse/control.c b/fs/fuse/control.c index a1303ad303ba..cc7e94d73c6c 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -164,6 +164,7 @@ static ssize_t fuse_conn_congestion_threshold_write(struct file *file, { unsigned val; struct fuse_conn *fc; + struct fuse_mount *fm; ssize_t ret; ret = fuse_conn_limit_write(file, buf, count, ppos, &val, @@ -174,18 +175,27 @@ static ssize_t fuse_conn_congestion_threshold_write(struct file *file, if (!fc) goto out; + down_read(&fc->killsb); spin_lock(&fc->bg_lock); fc->congestion_threshold = val; - if (fc->sb) { + + /* + * Get any fuse_mount belonging to this fuse_conn; s_bdi is + * shared between all of them + */ + + if (!list_empty(&fc->mounts)) { + fm = list_first_entry(&fc->mounts, struct fuse_mount, fc_entry); if (fc->num_background < fc->congestion_threshold) { - clear_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); - clear_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); + clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); + clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); } else { - set_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); - set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); + set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); + set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); } } spin_unlock(&fc->bg_lock); + up_read(&fc->killsb); fuse_conn_put(fc); out: return ret; diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c index 2cc17816d7b1..45082269e698 100644 --- a/fs/fuse/cuse.c +++ b/fs/fuse/cuse.c @@ -57,6 +57,7 @@ struct cuse_conn { struct list_head list; /* linked on cuse_conntbl */ + struct fuse_mount fm; /* Dummy mount referencing fc */ struct fuse_conn fc; /* fuse connection */ struct cdev *cdev; /* associated character device */ struct device *dev; /* device representing @cdev */ @@ -134,7 +135,7 @@ static int cuse_open(struct inode *inode, struct file *file) * Generic permission check is already done against the chrdev * file, proceed to open. */ - rc = fuse_do_open(&cc->fc, 0, file, 0); + rc = fuse_do_open(&cc->fm, 0, file, 0); if (rc) fuse_conn_put(&cc->fc); return rc; @@ -143,10 +144,10 @@ static int cuse_open(struct inode *inode, struct file *file) static int cuse_release(struct inode *inode, struct file *file) { struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; fuse_sync_release(NULL, ff, file->f_flags); - fuse_conn_put(fc); + fuse_conn_put(fm->fc); return 0; } @@ -155,7 +156,7 @@ static long cuse_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct fuse_file *ff = file->private_data; - struct cuse_conn *cc = fc_to_cc(ff->fc); + struct cuse_conn *cc = fc_to_cc(ff->fm->fc); unsigned int flags = 0; if (cc->unrestricted_ioctl) @@ -168,7 +169,7 @@ static long cuse_file_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct fuse_file *ff = file->private_data; - struct cuse_conn *cc = fc_to_cc(ff->fc); + struct cuse_conn *cc = fc_to_cc(ff->fm->fc); unsigned int flags = FUSE_IOCTL_COMPAT; if (cc->unrestricted_ioctl) @@ -313,9 +314,10 @@ struct cuse_init_args { * required data structures for it. Please read the comment at the * top of this file for high level overview. */ -static void cuse_process_init_reply(struct fuse_conn *fc, +static void cuse_process_init_reply(struct fuse_mount *fm, struct fuse_args *args, int error) { + struct fuse_conn *fc = fm->fc; struct cuse_init_args *ia = container_of(args, typeof(*ia), ap.args); struct fuse_args_pages *ap = &ia->ap; struct cuse_conn *cc = fc_to_cc(fc), *pos; @@ -424,7 +426,7 @@ static int cuse_send_init(struct cuse_conn *cc) { int rc; struct page *page; - struct fuse_conn *fc = &cc->fc; + struct fuse_mount *fm = &cc->fm; struct cuse_init_args *ia; struct fuse_args_pages *ap; @@ -460,7 +462,7 @@ static int cuse_send_init(struct cuse_conn *cc) ia->desc.length = ap->args.out_args[1].size; ap->args.end = cuse_process_init_reply; - rc = fuse_simple_background(fc, &ap->args, GFP_KERNEL); + rc = fuse_simple_background(fm, &ap->args, GFP_KERNEL); if (rc) { kfree(ia); err_free_page: @@ -506,7 +508,8 @@ static int cuse_channel_open(struct inode *inode, struct file *file) * Limit the cuse channel to requests that can * be represented in file->f_cred->user_ns. */ - fuse_conn_init(&cc->fc, file->f_cred->user_ns, &fuse_dev_fiq_ops, NULL); + fuse_conn_init(&cc->fc, &cc->fm, file->f_cred->user_ns, + &fuse_dev_fiq_ops, NULL); fud = fuse_dev_alloc_install(&cc->fc); if (!fud) { diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index e394dba08cc4..ff99ab2a3c43 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -182,8 +182,8 @@ static int fuse_setup_one_mapping(struct inode *inode, unsigned long start_idx, struct fuse_dax_mapping *dmap, bool writable, bool upgrade) { - struct fuse_conn *fc = get_fuse_conn(inode); - struct fuse_conn_dax *fcd = fc->dax; + struct fuse_mount *fm = get_fuse_mount(inode); + struct fuse_conn_dax *fcd = fm->fc->dax; struct fuse_inode *fi = get_fuse_inode(inode); struct fuse_setupmapping_in inarg; loff_t offset = start_idx << FUSE_DAX_SHIFT; @@ -206,7 +206,7 @@ static int fuse_setup_one_mapping(struct inode *inode, unsigned long start_idx, args.in_numargs = 1; args.in_args[0].size = sizeof(inarg); args.in_args[0].value = &inarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err < 0) return err; dmap->writable = writable; @@ -234,7 +234,7 @@ static int fuse_send_removemapping(struct inode *inode, struct fuse_removemapping_one *remove_one) { struct fuse_inode *fi = get_fuse_inode(inode); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); args.opcode = FUSE_REMOVEMAPPING; @@ -244,7 +244,7 @@ static int fuse_send_removemapping(struct inode *inode, args.in_args[0].value = inargp; args.in_args[1].size = inargp->count * sizeof(*remove_one); args.in_args[1].value = remove_one; - return fuse_simple_request(fc, &args); + return fuse_simple_request(fm, &args); } static int dmap_removemapping_list(struct inode *inode, unsigned int num, diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 81e85b74c616..588f8d1240aa 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -40,21 +40,21 @@ static struct fuse_dev *fuse_get_dev(struct file *file) return READ_ONCE(file->private_data); } -static void fuse_request_init(struct fuse_conn *fc, struct fuse_req *req) +static void fuse_request_init(struct fuse_mount *fm, struct fuse_req *req) { INIT_LIST_HEAD(&req->list); INIT_LIST_HEAD(&req->intr_entry); init_waitqueue_head(&req->waitq); refcount_set(&req->count, 1); __set_bit(FR_PENDING, &req->flags); - req->fc = fc; + req->fm = fm; } -static struct fuse_req *fuse_request_alloc(struct fuse_conn *fc, gfp_t flags) +static struct fuse_req *fuse_request_alloc(struct fuse_mount *fm, gfp_t flags) { struct fuse_req *req = kmem_cache_zalloc(fuse_req_cachep, flags); if (req) - fuse_request_init(fc, req); + fuse_request_init(fm, req); return req; } @@ -103,8 +103,9 @@ static void fuse_drop_waiting(struct fuse_conn *fc) static void fuse_put_request(struct fuse_req *req); -static struct fuse_req *fuse_get_req(struct fuse_conn *fc, bool for_background) +static struct fuse_req *fuse_get_req(struct fuse_mount *fm, bool for_background) { + struct fuse_conn *fc = fm->fc; struct fuse_req *req; int err; atomic_inc(&fc->num_waiting); @@ -126,7 +127,7 @@ static struct fuse_req *fuse_get_req(struct fuse_conn *fc, bool for_background) if (fc->conn_error) goto out; - req = fuse_request_alloc(fc, GFP_KERNEL); + req = fuse_request_alloc(fm, GFP_KERNEL); err = -ENOMEM; if (!req) { if (for_background) @@ -156,7 +157,7 @@ static struct fuse_req *fuse_get_req(struct fuse_conn *fc, bool for_background) static void fuse_put_request(struct fuse_req *req) { - struct fuse_conn *fc = req->fc; + struct fuse_conn *fc = req->fm->fc; if (refcount_dec_and_test(&req->count)) { if (test_bit(FR_BACKGROUND, &req->flags)) { @@ -278,7 +279,8 @@ static void flush_bg_queue(struct fuse_conn *fc) */ void fuse_request_end(struct fuse_req *req) { - struct fuse_conn *fc = req->fc; + struct fuse_mount *fm = req->fm; + struct fuse_conn *fc = fm->fc; struct fuse_iqueue *fiq = &fc->iq; if (test_and_set_bit(FR_FINISHED, &req->flags)) @@ -313,9 +315,9 @@ void fuse_request_end(struct fuse_req *req) wake_up(&fc->blocked_waitq); } - if (fc->num_background == fc->congestion_threshold && fc->sb) { - clear_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); - clear_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); + if (fc->num_background == fc->congestion_threshold && fm->sb) { + clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); + clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); } fc->num_background--; fc->active_background--; @@ -327,7 +329,7 @@ void fuse_request_end(struct fuse_req *req) } if (test_bit(FR_ASYNC, &req->flags)) - req->args->end(fc, req->args, req->out.h.error); + req->args->end(fm, req->args, req->out.h.error); put_request: fuse_put_request(req); } @@ -335,7 +337,7 @@ EXPORT_SYMBOL_GPL(fuse_request_end); static int queue_interrupt(struct fuse_req *req) { - struct fuse_iqueue *fiq = &req->fc->iq; + struct fuse_iqueue *fiq = &req->fm->fc->iq; spin_lock(&fiq->lock); /* Check for we've sent request to interrupt this req */ @@ -365,7 +367,7 @@ static int queue_interrupt(struct fuse_req *req) static void request_wait_answer(struct fuse_req *req) { - struct fuse_conn *fc = req->fc; + struct fuse_conn *fc = req->fm->fc; struct fuse_iqueue *fiq = &fc->iq; int err; @@ -411,7 +413,7 @@ static void request_wait_answer(struct fuse_req *req) static void __fuse_request_send(struct fuse_req *req) { - struct fuse_iqueue *fiq = &req->fc->iq; + struct fuse_iqueue *fiq = &req->fm->fc->iq; BUG_ON(test_bit(FR_BACKGROUND, &req->flags)); spin_lock(&fiq->lock); @@ -466,7 +468,7 @@ static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args) static void fuse_force_creds(struct fuse_req *req) { - struct fuse_conn *fc = req->fc; + struct fuse_conn *fc = req->fm->fc; req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid()); req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid()); @@ -482,14 +484,15 @@ static void fuse_args_to_req(struct fuse_req *req, struct fuse_args *args) __set_bit(FR_ASYNC, &req->flags); } -ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args) +ssize_t fuse_simple_request(struct fuse_mount *fm, struct fuse_args *args) { + struct fuse_conn *fc = fm->fc; struct fuse_req *req; ssize_t ret; if (args->force) { atomic_inc(&fc->num_waiting); - req = fuse_request_alloc(fc, GFP_KERNEL | __GFP_NOFAIL); + req = fuse_request_alloc(fm, GFP_KERNEL | __GFP_NOFAIL); if (!args->nocreds) fuse_force_creds(req); @@ -498,7 +501,7 @@ ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args) __set_bit(FR_FORCE, &req->flags); } else { WARN_ON(args->nocreds); - req = fuse_get_req(fc, false); + req = fuse_get_req(fm, false); if (IS_ERR(req)) return PTR_ERR(req); } @@ -522,7 +525,8 @@ ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args) static bool fuse_request_queue_background(struct fuse_req *req) { - struct fuse_conn *fc = req->fc; + struct fuse_mount *fm = req->fm; + struct fuse_conn *fc = fm->fc; bool queued = false; WARN_ON(!test_bit(FR_BACKGROUND, &req->flags)); @@ -536,9 +540,9 @@ static bool fuse_request_queue_background(struct fuse_req *req) fc->num_background++; if (fc->num_background == fc->max_background) fc->blocked = 1; - if (fc->num_background == fc->congestion_threshold && fc->sb) { - set_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC); - set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC); + if (fc->num_background == fc->congestion_threshold && fm->sb) { + set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC); + set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC); } list_add_tail(&req->list, &fc->bg_queue); flush_bg_queue(fc); @@ -549,20 +553,20 @@ static bool fuse_request_queue_background(struct fuse_req *req) return queued; } -int fuse_simple_background(struct fuse_conn *fc, struct fuse_args *args, +int fuse_simple_background(struct fuse_mount *fm, struct fuse_args *args, gfp_t gfp_flags) { struct fuse_req *req; if (args->force) { WARN_ON(!args->nocreds); - req = fuse_request_alloc(fc, gfp_flags); + req = fuse_request_alloc(fm, gfp_flags); if (!req) return -ENOMEM; __set_bit(FR_BACKGROUND, &req->flags); } else { WARN_ON(args->nocreds); - req = fuse_get_req(fc, true); + req = fuse_get_req(fm, true); if (IS_ERR(req)) return PTR_ERR(req); } @@ -578,14 +582,14 @@ int fuse_simple_background(struct fuse_conn *fc, struct fuse_args *args, } EXPORT_SYMBOL_GPL(fuse_simple_background); -static int fuse_simple_notify_reply(struct fuse_conn *fc, +static int fuse_simple_notify_reply(struct fuse_mount *fm, struct fuse_args *args, u64 unique) { struct fuse_req *req; - struct fuse_iqueue *fiq = &fc->iq; + struct fuse_iqueue *fiq = &fm->fc->iq; int err = 0; - req = fuse_get_req(fc, false); + req = fuse_get_req(fm, false); if (IS_ERR(req)) return PTR_ERR(req); @@ -1433,11 +1437,8 @@ static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size, fuse_copy_finish(cs); down_read(&fc->killsb); - err = -ENOENT; - if (fc->sb) { - err = fuse_reverse_inval_inode(fc->sb, outarg.ino, - outarg.off, outarg.len); - } + err = fuse_reverse_inval_inode(fc, outarg.ino, + outarg.off, outarg.len); up_read(&fc->killsb); return err; @@ -1483,9 +1484,7 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size, buf[outarg.namelen] = 0; down_read(&fc->killsb); - err = -ENOENT; - if (fc->sb) - err = fuse_reverse_inval_entry(fc->sb, outarg.parent, 0, &name); + err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name); up_read(&fc->killsb); kfree(buf); return err; @@ -1533,10 +1532,7 @@ static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size, buf[outarg.namelen] = 0; down_read(&fc->killsb); - err = -ENOENT; - if (fc->sb) - err = fuse_reverse_inval_entry(fc->sb, outarg.parent, - outarg.child, &name); + err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name); up_read(&fc->killsb); kfree(buf); return err; @@ -1578,10 +1574,7 @@ static int fuse_notify_store(struct fuse_conn *fc, unsigned int size, down_read(&fc->killsb); err = -ENOENT; - if (!fc->sb) - goto out_up_killsb; - - inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid); + inode = fuse_ilookup(fc, nodeid, NULL); if (!inode) goto out_up_killsb; @@ -1638,7 +1631,7 @@ struct fuse_retrieve_args { struct fuse_notify_retrieve_in inarg; }; -static void fuse_retrieve_end(struct fuse_conn *fc, struct fuse_args *args, +static void fuse_retrieve_end(struct fuse_mount *fm, struct fuse_args *args, int error) { struct fuse_retrieve_args *ra = @@ -1648,7 +1641,7 @@ static void fuse_retrieve_end(struct fuse_conn *fc, struct fuse_args *args, kfree(ra); } -static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode, +static int fuse_retrieve(struct fuse_mount *fm, struct inode *inode, struct fuse_notify_retrieve_out *outarg) { int err; @@ -1659,6 +1652,7 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode, unsigned int offset; size_t total_len = 0; unsigned int num_pages; + struct fuse_conn *fc = fm->fc; struct fuse_retrieve_args *ra; size_t args_size = sizeof(*ra); struct fuse_args_pages *ap; @@ -1720,9 +1714,9 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode, args->in_args[0].value = &ra->inarg; args->in_args[1].size = total_len; - err = fuse_simple_notify_reply(fc, args, outarg->notify_unique); + err = fuse_simple_notify_reply(fm, args, outarg->notify_unique); if (err) - fuse_retrieve_end(fc, args, err); + fuse_retrieve_end(fm, args, err); return err; } @@ -1731,7 +1725,9 @@ static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size, struct fuse_copy_state *cs) { struct fuse_notify_retrieve_out outarg; + struct fuse_mount *fm; struct inode *inode; + u64 nodeid; int err; err = -EINVAL; @@ -1746,14 +1742,12 @@ static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size, down_read(&fc->killsb); err = -ENOENT; - if (fc->sb) { - u64 nodeid = outarg.nodeid; + nodeid = outarg.nodeid; - inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid); - if (inode) { - err = fuse_retrieve(fc, inode, &outarg); - iput(inode); - } + inode = fuse_ilookup(fc, nodeid, &fm); + if (inode) { + err = fuse_retrieve(fm, inode, &outarg); + iput(inode); } up_read(&fc->killsb); diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index c4a01290aec6..c885d9b60263 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -196,7 +196,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) { struct inode *inode; struct dentry *parent; - struct fuse_conn *fc; + struct fuse_mount *fm; struct fuse_inode *fi; int ret; @@ -218,19 +218,19 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) if (flags & LOOKUP_RCU) goto out; - fc = get_fuse_conn(inode); + fm = get_fuse_mount(inode); forget = fuse_alloc_forget(); ret = -ENOMEM; if (!forget) goto out; - attr_version = fuse_get_attr_version(fc); + attr_version = fuse_get_attr_version(fm->fc); parent = dget_parent(entry); - fuse_lookup_init(fc, &args, get_node_id(d_inode(parent)), + fuse_lookup_init(fm->fc, &args, get_node_id(d_inode(parent)), &entry->d_name, &outarg); - ret = fuse_simple_request(fc, &args); + ret = fuse_simple_request(fm, &args); dput(parent); /* Zero nodeid is same as -ENOENT */ if (!ret && !outarg.nodeid) @@ -238,7 +238,8 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) if (!ret) { fi = get_fuse_inode(inode); if (outarg.nodeid != get_node_id(inode)) { - fuse_queue_forget(fc, forget, outarg.nodeid, 1); + fuse_queue_forget(fm->fc, forget, + outarg.nodeid, 1); goto invalid; } spin_lock(&fi->lock); @@ -329,7 +330,7 @@ bool fuse_invalid_attr(struct fuse_attr *attr) int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name, struct fuse_entry_out *outarg, struct inode **inode) { - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); FUSE_ARGS(args); struct fuse_forget_link *forget; u64 attr_version; @@ -346,10 +347,10 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name if (!forget) goto out; - attr_version = fuse_get_attr_version(fc); + attr_version = fuse_get_attr_version(fm->fc); - fuse_lookup_init(fc, &args, nodeid, name, outarg); - err = fuse_simple_request(fc, &args); + fuse_lookup_init(fm->fc, &args, nodeid, name, outarg); + err = fuse_simple_request(fm, &args); /* Zero nodeid is same as -ENOENT, but with valid timeout */ if (err || !outarg->nodeid) goto out_put_forget; @@ -365,7 +366,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name attr_version); err = -ENOMEM; if (!*inode) { - fuse_queue_forget(fc, forget, outarg->nodeid, 1); + fuse_queue_forget(fm->fc, forget, outarg->nodeid, 1); goto out; } err = 0; @@ -434,7 +435,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, { int err; struct inode *inode; - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); FUSE_ARGS(args); struct fuse_forget_link *forget; struct fuse_create_in inarg; @@ -452,11 +453,11 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, goto out_err; err = -ENOMEM; - ff = fuse_file_alloc(fc); + ff = fuse_file_alloc(fm); if (!ff) goto out_put_forget_req; - if (!fc->dont_mask) + if (!fm->fc->dont_mask) mode &= ~current_umask(); flags &= ~O_NOCTTY; @@ -477,7 +478,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, args.out_args[0].value = &outentry; args.out_args[1].size = sizeof(outopen); args.out_args[1].value = &outopen; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err) goto out_free_ff; @@ -494,7 +495,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, if (!inode) { flags &= ~(O_CREAT | O_EXCL | O_TRUNC); fuse_sync_release(NULL, ff, flags); - fuse_queue_forget(fc, forget, outentry.nodeid, 1); + fuse_queue_forget(fm->fc, forget, outentry.nodeid, 1); err = -ENOMEM; goto out_err; } @@ -567,7 +568,7 @@ no_open: /* * Code shared between mknod, mkdir, symlink and link */ -static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args, +static int create_new_entry(struct fuse_mount *fm, struct fuse_args *args, struct inode *dir, struct dentry *entry, umode_t mode) { @@ -586,7 +587,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args, args->out_numargs = 1; args->out_args[0].size = sizeof(outarg); args->out_args[0].value = &outarg; - err = fuse_simple_request(fc, args); + err = fuse_simple_request(fm, args); if (err) goto out_put_forget_req; @@ -600,7 +601,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args, inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, &outarg.attr, entry_attr_timeout(&outarg), 0); if (!inode) { - fuse_queue_forget(fc, forget, outarg.nodeid, 1); + fuse_queue_forget(fm->fc, forget, outarg.nodeid, 1); return -ENOMEM; } kfree(forget); @@ -628,10 +629,10 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode, dev_t rdev) { struct fuse_mknod_in inarg; - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); FUSE_ARGS(args); - if (!fc->dont_mask) + if (!fm->fc->dont_mask) mode &= ~current_umask(); memset(&inarg, 0, sizeof(inarg)); @@ -644,7 +645,7 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode, args.in_args[0].value = &inarg; args.in_args[1].size = entry->d_name.len + 1; args.in_args[1].value = entry->d_name.name; - return create_new_entry(fc, &args, dir, entry, mode); + return create_new_entry(fm, &args, dir, entry, mode); } static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode, @@ -656,10 +657,10 @@ static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode, static int fuse_mkdir(struct inode *dir, struct dentry *entry, umode_t mode) { struct fuse_mkdir_in inarg; - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); FUSE_ARGS(args); - if (!fc->dont_mask) + if (!fm->fc->dont_mask) mode &= ~current_umask(); memset(&inarg, 0, sizeof(inarg)); @@ -671,13 +672,13 @@ static int fuse_mkdir(struct inode *dir, struct dentry *entry, umode_t mode) args.in_args[0].value = &inarg; args.in_args[1].size = entry->d_name.len + 1; args.in_args[1].value = entry->d_name.name; - return create_new_entry(fc, &args, dir, entry, S_IFDIR); + return create_new_entry(fm, &args, dir, entry, S_IFDIR); } static int fuse_symlink(struct inode *dir, struct dentry *entry, const char *link) { - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); unsigned len = strlen(link) + 1; FUSE_ARGS(args); @@ -687,7 +688,7 @@ static int fuse_symlink(struct inode *dir, struct dentry *entry, args.in_args[0].value = entry->d_name.name; args.in_args[1].size = len; args.in_args[1].value = link; - return create_new_entry(fc, &args, dir, entry, S_IFLNK); + return create_new_entry(fm, &args, dir, entry, S_IFLNK); } void fuse_update_ctime(struct inode *inode) @@ -701,7 +702,7 @@ void fuse_update_ctime(struct inode *inode) static int fuse_unlink(struct inode *dir, struct dentry *entry) { int err; - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); FUSE_ARGS(args); args.opcode = FUSE_UNLINK; @@ -709,13 +710,13 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry) args.in_numargs = 1; args.in_args[0].size = entry->d_name.len + 1; args.in_args[0].value = entry->d_name.name; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) { struct inode *inode = d_inode(entry); struct fuse_inode *fi = get_fuse_inode(inode); spin_lock(&fi->lock); - fi->attr_version = atomic64_inc_return(&fc->attr_version); + fi->attr_version = atomic64_inc_return(&fm->fc->attr_version); /* * If i_nlink == 0 then unlink doesn't make sense, yet this can * happen if userspace filesystem is careless. It would be @@ -737,7 +738,7 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry) static int fuse_rmdir(struct inode *dir, struct dentry *entry) { int err; - struct fuse_conn *fc = get_fuse_conn(dir); + struct fuse_mount *fm = get_fuse_mount(dir); FUSE_ARGS(args); args.opcode = FUSE_RMDIR; @@ -745,7 +746,7 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry) args.in_numargs = 1; args.in_args[0].size = entry->d_name.len + 1; args.in_args[0].value = entry->d_name.name; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) { clear_nlink(d_inode(entry)); fuse_dir_changed(dir); @@ -761,7 +762,7 @@ static int fuse_rename_common(struct inode *olddir, struct dentry *oldent, { int err; struct fuse_rename2_in inarg; - struct fuse_conn *fc = get_fuse_conn(olddir); + struct fuse_mount *fm = get_fuse_mount(olddir); FUSE_ARGS(args); memset(&inarg, 0, argsize); @@ -776,7 +777,7 @@ static int fuse_rename_common(struct inode *olddir, struct dentry *oldent, args.in_args[1].value = oldent->d_name.name; args.in_args[2].size = newent->d_name.len + 1; args.in_args[2].value = newent->d_name.name; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) { /* ctime changes */ fuse_invalidate_attr(d_inode(oldent)); @@ -847,7 +848,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, int err; struct fuse_link_in inarg; struct inode *inode = d_inode(entry); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); memset(&inarg, 0, sizeof(inarg)); @@ -858,7 +859,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, args.in_args[0].value = &inarg; args.in_args[1].size = newent->d_name.len + 1; args.in_args[1].value = newent->d_name.name; - err = create_new_entry(fc, &args, newdir, newent, inode->i_mode); + err = create_new_entry(fm, &args, newdir, newent, inode->i_mode); /* Contrary to "normal" filesystems it can happen that link makes two "logical" inodes point to the same "physical" inode. We invalidate the attributes of the old one, so it @@ -869,7 +870,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, struct fuse_inode *fi = get_fuse_inode(inode); spin_lock(&fi->lock); - fi->attr_version = atomic64_inc_return(&fc->attr_version); + fi->attr_version = atomic64_inc_return(&fm->fc->attr_version); if (likely(inode->i_nlink < UINT_MAX)) inc_nlink(inode); spin_unlock(&fi->lock); @@ -926,11 +927,11 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat, int err; struct fuse_getattr_in inarg; struct fuse_attr_out outarg; - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); u64 attr_version; - attr_version = fuse_get_attr_version(fc); + attr_version = fuse_get_attr_version(fm->fc); memset(&inarg, 0, sizeof(inarg)); memset(&outarg, 0, sizeof(outarg)); @@ -949,7 +950,7 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat, args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) { if (fuse_invalid_attr(&outarg.attr) || (inode->i_mode ^ outarg.attr.mode) & S_IFMT) { @@ -1002,7 +1003,7 @@ int fuse_update_attributes(struct inode *inode, struct file *file) STATX_BASIC_STATS & ~STATX_ATIME, 0); } -int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, +int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid, u64 child_nodeid, struct qstr *name) { int err = -ENOTDIR; @@ -1010,7 +1011,7 @@ int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, struct dentry *dir; struct dentry *entry; - parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid); + parent = fuse_ilookup(fc, parent_nodeid, NULL); if (!parent) return -ENOENT; @@ -1102,14 +1103,14 @@ int fuse_allow_current_process(struct fuse_conn *fc) static int fuse_access(struct inode *inode, int mask) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_access_in inarg; int err; BUG_ON(mask & MAY_NOT_BLOCK); - if (fc->no_access) + if (fm->fc->no_access) return 0; memset(&inarg, 0, sizeof(inarg)); @@ -1119,9 +1120,9 @@ static int fuse_access(struct inode *inode, int mask) args.in_numargs = 1; args.in_args[0].size = sizeof(inarg); args.in_args[0].value = &inarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { - fc->no_access = 1; + fm->fc->no_access = 1; err = 0; } return err; @@ -1209,7 +1210,7 @@ static int fuse_permission(struct inode *inode, int mask) static int fuse_readlink_page(struct inode *inode, struct page *page) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_page_desc desc = { .length = PAGE_SIZE - 1 }; struct fuse_args_pages ap = { .num_pages = 1, @@ -1226,7 +1227,7 @@ static int fuse_readlink_page(struct inode *inode, struct page *page) ap.args.page_zeroing = true; ap.args.out_numargs = 1; ap.args.out_args[0].size = desc.length; - res = fuse_simple_request(fc, &ap.args); + res = fuse_simple_request(fm, &ap.args); fuse_invalidate_atime(inode); @@ -1454,7 +1455,7 @@ static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_args *args, */ int fuse_flush_times(struct inode *inode, struct fuse_file *ff) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_setattr_in inarg; struct fuse_attr_out outarg; @@ -1465,7 +1466,7 @@ int fuse_flush_times(struct inode *inode, struct fuse_file *ff) inarg.valid = FATTR_MTIME; inarg.mtime = inode->i_mtime.tv_sec; inarg.mtimensec = inode->i_mtime.tv_nsec; - if (fc->minor >= 23) { + if (fm->fc->minor >= 23) { inarg.valid |= FATTR_CTIME; inarg.ctime = inode->i_ctime.tv_sec; inarg.ctimensec = inode->i_ctime.tv_nsec; @@ -1474,9 +1475,9 @@ int fuse_flush_times(struct inode *inode, struct fuse_file *ff) inarg.valid |= FATTR_FH; inarg.fh = ff->fh; } - fuse_setattr_fill(fc, &args, inode, &inarg, &outarg); + fuse_setattr_fill(fm->fc, &args, inode, &inarg, &outarg); - return fuse_simple_request(fc, &args); + return fuse_simple_request(fm, &args); } /* @@ -1491,7 +1492,8 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, struct file *file) { struct inode *inode = d_inode(dentry); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); + struct fuse_conn *fc = fm->fc; struct fuse_inode *fi = get_fuse_inode(inode); FUSE_ARGS(args); struct fuse_setattr_in inarg; @@ -1577,7 +1579,7 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, inarg.lock_owner = fuse_lock_owner_id(fc, current->files); } fuse_setattr_fill(fc, &args, inode, &inarg, &outarg); - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err) { if (err == -EINTR) fuse_invalidate_attr(inode); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 172a0b1aa634..53d4dd1ab992 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -32,7 +32,7 @@ static struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags, return pages; } -static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file, +static int fuse_send_open(struct fuse_mount *fm, u64 nodeid, struct file *file, int opcode, struct fuse_open_out *outargp) { struct fuse_open_in inarg; @@ -40,7 +40,7 @@ static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file, memset(&inarg, 0, sizeof(inarg)); inarg.flags = file->f_flags & ~(O_CREAT | O_EXCL | O_NOCTTY); - if (!fc->atomic_o_trunc) + if (!fm->fc->atomic_o_trunc) inarg.flags &= ~O_TRUNC; args.opcode = opcode; args.nodeid = nodeid; @@ -51,7 +51,7 @@ static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file, args.out_args[0].size = sizeof(*outargp); args.out_args[0].value = outargp; - return fuse_simple_request(fc, &args); + return fuse_simple_request(fm, &args); } struct fuse_release_args { @@ -60,7 +60,7 @@ struct fuse_release_args { struct inode *inode; }; -struct fuse_file *fuse_file_alloc(struct fuse_conn *fc) +struct fuse_file *fuse_file_alloc(struct fuse_mount *fm) { struct fuse_file *ff; @@ -68,7 +68,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc) if (unlikely(!ff)) return NULL; - ff->fc = fc; + ff->fm = fm; ff->release_args = kzalloc(sizeof(*ff->release_args), GFP_KERNEL_ACCOUNT); if (!ff->release_args) { @@ -82,7 +82,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc) RB_CLEAR_NODE(&ff->polled_node); init_waitqueue_head(&ff->poll_wait); - ff->kh = atomic64_inc_return(&fc->khctr); + ff->kh = atomic64_inc_return(&fm->fc->khctr); return ff; } @@ -100,7 +100,7 @@ static struct fuse_file *fuse_file_get(struct fuse_file *ff) return ff; } -static void fuse_release_end(struct fuse_conn *fc, struct fuse_args *args, +static void fuse_release_end(struct fuse_mount *fm, struct fuse_args *args, int error) { struct fuse_release_args *ra = container_of(args, typeof(*ra), args); @@ -114,29 +114,30 @@ static void fuse_file_put(struct fuse_file *ff, bool sync, bool isdir) if (refcount_dec_and_test(&ff->count)) { struct fuse_args *args = &ff->release_args->args; - if (isdir ? ff->fc->no_opendir : ff->fc->no_open) { + if (isdir ? ff->fm->fc->no_opendir : ff->fm->fc->no_open) { /* Do nothing when client does not implement 'open' */ - fuse_release_end(ff->fc, args, 0); + fuse_release_end(ff->fm, args, 0); } else if (sync) { - fuse_simple_request(ff->fc, args); - fuse_release_end(ff->fc, args, 0); + fuse_simple_request(ff->fm, args); + fuse_release_end(ff->fm, args, 0); } else { args->end = fuse_release_end; - if (fuse_simple_background(ff->fc, args, + if (fuse_simple_background(ff->fm, args, GFP_KERNEL | __GFP_NOFAIL)) - fuse_release_end(ff->fc, args, -ENOTCONN); + fuse_release_end(ff->fm, args, -ENOTCONN); } kfree(ff); } } -int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, +int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file, bool isdir) { + struct fuse_conn *fc = fm->fc; struct fuse_file *ff; int opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN; - ff = fuse_file_alloc(fc); + ff = fuse_file_alloc(fm); if (!ff) return -ENOMEM; @@ -147,7 +148,7 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, struct fuse_open_out outarg; int err; - err = fuse_send_open(fc, nodeid, file, opcode, &outarg); + err = fuse_send_open(fm, nodeid, file, opcode, &outarg); if (!err) { ff->fh = outarg.fh; ff->open_flags = outarg.open_flags; @@ -216,7 +217,8 @@ void fuse_finish_open(struct inode *inode, struct file *file) int fuse_open_common(struct inode *inode, struct file *file, bool isdir) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); + struct fuse_conn *fc = fm->fc; int err; bool is_wb_truncate = (file->f_flags & O_TRUNC) && fc->atomic_o_trunc && @@ -240,7 +242,7 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir) goto out; } - err = fuse_do_open(fc, get_node_id(inode), file, isdir); + err = fuse_do_open(fm, get_node_id(inode), file, isdir); if (!err) fuse_finish_open(inode, file); @@ -259,7 +261,7 @@ out: static void fuse_prepare_release(struct fuse_inode *fi, struct fuse_file *ff, int flags, int opcode) { - struct fuse_conn *fc = ff->fc; + struct fuse_conn *fc = ff->fm->fc; struct fuse_release_args *ra = ff->release_args; /* Inode is NULL on error path of fuse_create_open() */ @@ -297,7 +299,7 @@ void fuse_release_common(struct file *file, bool isdir) if (ff->flock) { ra->inarg.release_flags |= FUSE_RELEASE_FLOCK_UNLOCK; - ra->inarg.lock_owner = fuse_lock_owner_id(ff->fc, + ra->inarg.lock_owner = fuse_lock_owner_id(ff->fm->fc, (fl_owner_t) file); } /* Hold inode until release is finished */ @@ -312,7 +314,7 @@ void fuse_release_common(struct file *file, bool isdir) * synchronous RELEASE is allowed (and desirable) in this case * because the server can be trusted not to screw up. */ - fuse_file_put(ff, ff->fc->destroy, isdir); + fuse_file_put(ff, ff->fm->fc->destroy, isdir); } static int fuse_open(struct inode *inode, struct file *file) @@ -455,7 +457,7 @@ static void fuse_sync_writes(struct inode *inode) static int fuse_flush(struct file *file, fl_owner_t id) { struct inode *inode = file_inode(file); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_file *ff = file->private_data; struct fuse_flush_in inarg; FUSE_ARGS(args); @@ -477,12 +479,12 @@ static int fuse_flush(struct file *file, fl_owner_t id) return err; err = 0; - if (fc->no_flush) + if (fm->fc->no_flush) goto inval_attr_out; memset(&inarg, 0, sizeof(inarg)); inarg.fh = ff->fh; - inarg.lock_owner = fuse_lock_owner_id(fc, id); + inarg.lock_owner = fuse_lock_owner_id(fm->fc, id); args.opcode = FUSE_FLUSH; args.nodeid = get_node_id(inode); args.in_numargs = 1; @@ -490,9 +492,9 @@ static int fuse_flush(struct file *file, fl_owner_t id) args.in_args[0].value = &inarg; args.force = true; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { - fc->no_flush = 1; + fm->fc->no_flush = 1; err = 0; } @@ -501,7 +503,7 @@ inval_attr_out: * In memory i_blocks is not maintained by fuse, if writeback cache is * enabled, i_blocks from cached attr may not be accurate. */ - if (!err && fc->writeback_cache) + if (!err && fm->fc->writeback_cache) fuse_invalidate_attr(inode); return err; } @@ -510,7 +512,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end, int datasync, int opcode) { struct inode *inode = file->f_mapping->host; - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_file *ff = file->private_data; FUSE_ARGS(args); struct fuse_fsync_in inarg; @@ -523,7 +525,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end, args.in_numargs = 1; args.in_args[0].size = sizeof(inarg); args.in_args[0].value = &inarg; - return fuse_simple_request(fc, &args); + return fuse_simple_request(fm, &args); } static int fuse_fsync(struct file *file, loff_t start, loff_t end, @@ -698,7 +700,7 @@ static void fuse_io_free(struct fuse_io_args *ia) kfree(ia); } -static void fuse_aio_complete_req(struct fuse_conn *fc, struct fuse_args *args, +static void fuse_aio_complete_req(struct fuse_mount *fm, struct fuse_args *args, int err) { struct fuse_io_args *ia = container_of(args, typeof(*ia), ap.args); @@ -727,7 +729,7 @@ static void fuse_aio_complete_req(struct fuse_conn *fc, struct fuse_args *args, fuse_io_free(ia); } -static ssize_t fuse_async_req_send(struct fuse_conn *fc, +static ssize_t fuse_async_req_send(struct fuse_mount *fm, struct fuse_io_args *ia, size_t num_bytes) { ssize_t err; @@ -741,9 +743,9 @@ static ssize_t fuse_async_req_send(struct fuse_conn *fc, ia->ap.args.end = fuse_aio_complete_req; ia->ap.args.may_block = io->should_dirty; - err = fuse_simple_background(fc, &ia->ap.args, GFP_KERNEL); + err = fuse_simple_background(fm, &ia->ap.args, GFP_KERNEL); if (err) - fuse_aio_complete_req(fc, &ia->ap.args, err); + fuse_aio_complete_req(fm, &ia->ap.args, err); return num_bytes; } @@ -753,18 +755,18 @@ static ssize_t fuse_send_read(struct fuse_io_args *ia, loff_t pos, size_t count, { struct file *file = ia->io->iocb->ki_filp; struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; fuse_read_args_fill(ia, file, pos, count, FUSE_READ); if (owner != NULL) { ia->read.in.read_flags |= FUSE_READ_LOCKOWNER; - ia->read.in.lock_owner = fuse_lock_owner_id(fc, owner); + ia->read.in.lock_owner = fuse_lock_owner_id(fm->fc, owner); } if (ia->io->async) - return fuse_async_req_send(fc, ia, count); + return fuse_async_req_send(fm, ia, count); - return fuse_simple_request(fc, &ia->ap.args); + return fuse_simple_request(fm, &ia->ap.args); } static void fuse_read_update_size(struct inode *inode, loff_t size, @@ -810,7 +812,7 @@ static void fuse_short_read(struct inode *inode, u64 attr_ver, size_t num_read, static int fuse_do_readpage(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); loff_t pos = page_offset(page); struct fuse_page_desc desc = { .length = PAGE_SIZE }; struct fuse_io_args ia = { @@ -830,14 +832,14 @@ static int fuse_do_readpage(struct file *file, struct page *page) */ fuse_wait_on_page_writeback(inode, page->index); - attr_ver = fuse_get_attr_version(fc); + attr_ver = fuse_get_attr_version(fm->fc); /* Don't overflow end offset */ if (pos + (desc.length - 1) == LLONG_MAX) desc.length--; fuse_read_args_fill(&ia, file, pos, desc.length, FUSE_READ); - res = fuse_simple_request(fc, &ia.ap.args); + res = fuse_simple_request(fm, &ia.ap.args); if (res < 0) return res; /* @@ -867,7 +869,7 @@ static int fuse_readpage(struct file *file, struct page *page) return err; } -static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_args *args, +static void fuse_readpages_end(struct fuse_mount *fm, struct fuse_args *args, int err) { int i; @@ -911,7 +913,7 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_args *args, static void fuse_send_readpages(struct fuse_io_args *ia, struct file *file) { struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; struct fuse_args_pages *ap = &ia->ap; loff_t pos = page_offset(ap->pages[0]); size_t count = ap->num_pages << PAGE_SHIFT; @@ -930,18 +932,18 @@ static void fuse_send_readpages(struct fuse_io_args *ia, struct file *file) WARN_ON((loff_t) (pos + count) < 0); fuse_read_args_fill(ia, file, pos, count, FUSE_READ); - ia->read.attr_ver = fuse_get_attr_version(fc); - if (fc->async_read) { + ia->read.attr_ver = fuse_get_attr_version(fm->fc); + if (fm->fc->async_read) { ia->ff = fuse_file_get(ff); ap->args.end = fuse_readpages_end; - err = fuse_simple_background(fc, &ap->args, GFP_KERNEL); + err = fuse_simple_background(fm, &ap->args, GFP_KERNEL); if (!err) return; } else { - res = fuse_simple_request(fc, &ap->args); + res = fuse_simple_request(fm, &ap->args); err = res < 0 ? res : 0; } - fuse_readpages_end(fc, &ap->args, err); + fuse_readpages_end(fm, &ap->args, err); } static void fuse_readahead(struct readahead_control *rac) @@ -1012,7 +1014,7 @@ static void fuse_write_args_fill(struct fuse_io_args *ia, struct fuse_file *ff, args->opcode = FUSE_WRITE; args->nodeid = ff->nodeid; args->in_numargs = 2; - if (ff->fc->minor < 9) + if (ff->fm->fc->minor < 9) args->in_args[0].size = FUSE_COMPAT_WRITE_IN_SIZE; else args->in_args[0].size = sizeof(ia->write.in); @@ -1041,7 +1043,7 @@ static ssize_t fuse_send_write(struct fuse_io_args *ia, loff_t pos, struct kiocb *iocb = ia->io->iocb; struct file *file = iocb->ki_filp; struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; struct fuse_write_in *inarg = &ia->write.in; ssize_t err; @@ -1049,13 +1051,13 @@ static ssize_t fuse_send_write(struct fuse_io_args *ia, loff_t pos, inarg->flags = fuse_write_flags(iocb); if (owner != NULL) { inarg->write_flags |= FUSE_WRITE_LOCKOWNER; - inarg->lock_owner = fuse_lock_owner_id(fc, owner); + inarg->lock_owner = fuse_lock_owner_id(fm->fc, owner); } if (ia->io->async) - return fuse_async_req_send(fc, ia, count); + return fuse_async_req_send(fm, ia, count); - err = fuse_simple_request(fc, &ia->ap.args); + err = fuse_simple_request(fm, &ia->ap.args); if (!err && ia->write.out.size > count) err = -EIO; @@ -1086,7 +1088,7 @@ static ssize_t fuse_send_write_pages(struct fuse_io_args *ia, struct fuse_args_pages *ap = &ia->ap; struct file *file = iocb->ki_filp; struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; unsigned int offset, i; int err; @@ -1096,7 +1098,7 @@ static ssize_t fuse_send_write_pages(struct fuse_io_args *ia, fuse_write_args_fill(ia, ff, pos, count); ia->write.in.flags = fuse_write_flags(iocb); - err = fuse_simple_request(fc, &ap->args); + err = fuse_simple_request(fm, &ap->args); if (!err && ia->write.out.size > count) err = -EIO; @@ -1411,7 +1413,7 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, struct file *file = io->iocb->ki_filp; struct inode *inode = file->f_mapping->host; struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_conn *fc = ff->fm->fc; size_t nmax = write ? fc->max_write : fc->max_read; loff_t pos = *ppos; size_t count = iov_iter_count(iter); @@ -1598,7 +1600,7 @@ static void fuse_writepage_free(struct fuse_writepage_args *wpa) kfree(wpa); } -static void fuse_writepage_finish(struct fuse_conn *fc, +static void fuse_writepage_finish(struct fuse_mount *fm, struct fuse_writepage_args *wpa) { struct fuse_args_pages *ap = &wpa->ia.ap; @@ -1616,7 +1618,7 @@ static void fuse_writepage_finish(struct fuse_conn *fc, } /* Called under fi->lock, may release and reacquire it */ -static void fuse_send_writepage(struct fuse_conn *fc, +static void fuse_send_writepage(struct fuse_mount *fm, struct fuse_writepage_args *wpa, loff_t size) __releases(fi->lock) __acquires(fi->lock) @@ -1642,10 +1644,10 @@ __acquires(fi->lock) args->force = true; args->nocreds = true; - err = fuse_simple_background(fc, args, GFP_ATOMIC); + err = fuse_simple_background(fm, args, GFP_ATOMIC); if (err == -ENOMEM) { spin_unlock(&fi->lock); - err = fuse_simple_background(fc, args, GFP_NOFS | __GFP_NOFAIL); + err = fuse_simple_background(fm, args, GFP_NOFS | __GFP_NOFAIL); spin_lock(&fi->lock); } @@ -1658,7 +1660,7 @@ __acquires(fi->lock) out_free: fi->writectr--; rb_erase(&wpa->writepages_entry, &fi->writepages); - fuse_writepage_finish(fc, wpa); + fuse_writepage_finish(fm, wpa); spin_unlock(&fi->lock); /* After fuse_writepage_finish() aux request list is private */ @@ -1682,7 +1684,7 @@ void fuse_flush_writepages(struct inode *inode) __releases(fi->lock) __acquires(fi->lock) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_inode *fi = get_fuse_inode(inode); loff_t crop = i_size_read(inode); struct fuse_writepage_args *wpa; @@ -1691,7 +1693,7 @@ __acquires(fi->lock) wpa = list_entry(fi->queued_writes.next, struct fuse_writepage_args, queue_entry); list_del_init(&wpa->queue_entry); - fuse_send_writepage(fc, wpa, crop); + fuse_send_writepage(fm, wpa, crop); } } @@ -1732,7 +1734,7 @@ static void tree_insert(struct rb_root *root, struct fuse_writepage_args *wpa) WARN_ON(fuse_insert_writeback(root, wpa)); } -static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_args *args, +static void fuse_writepage_end(struct fuse_mount *fm, struct fuse_args *args, int error) { struct fuse_writepage_args *wpa = @@ -1744,7 +1746,7 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_args *args, spin_lock(&fi->lock); rb_erase(&wpa->writepages_entry, &fi->writepages); while (wpa->next) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_write_in *inarg = &wpa->ia.write.in; struct fuse_writepage_args *next = wpa->next; @@ -1776,10 +1778,10 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_args *args, * no invocations of fuse_writepage_end() while we're in * fuse_set_nowrite..fuse_release_nowrite section. */ - fuse_send_writepage(fc, next, inarg->offset + inarg->size); + fuse_send_writepage(fm, next, inarg->offset + inarg->size); } fi->writectr--; - fuse_writepage_finish(fc, wpa); + fuse_writepage_finish(fm, wpa); spin_unlock(&fi->lock); fuse_writepage_free(wpa); } @@ -2419,7 +2421,7 @@ static void fuse_lk_fill(struct fuse_args *args, struct file *file, static int fuse_getlk(struct file *file, struct file_lock *fl) { struct inode *inode = file_inode(file); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_lk_in inarg; struct fuse_lk_out outarg; @@ -2429,9 +2431,9 @@ static int fuse_getlk(struct file *file, struct file_lock *fl) args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) - err = convert_fuse_file_lock(fc, &outarg.lk, fl); + err = convert_fuse_file_lock(fm->fc, &outarg.lk, fl); return err; } @@ -2439,12 +2441,12 @@ static int fuse_getlk(struct file *file, struct file_lock *fl) static int fuse_setlk(struct file *file, struct file_lock *fl, int flock) { struct inode *inode = file_inode(file); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_lk_in inarg; int opcode = (fl->fl_flags & FL_SLEEP) ? FUSE_SETLKW : FUSE_SETLK; struct pid *pid = fl->fl_type != F_UNLCK ? task_tgid(current) : NULL; - pid_t pid_nr = pid_nr_ns(pid, fc->pid_ns); + pid_t pid_nr = pid_nr_ns(pid, fm->fc->pid_ns); int err; if (fl->fl_lmops && fl->fl_lmops->lm_grant) { @@ -2457,7 +2459,7 @@ static int fuse_setlk(struct file *file, struct file_lock *fl, int flock) return 0; fuse_lk_fill(&args, file, fl, opcode, pid_nr, flock, &inarg); - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); /* locking is restartable */ if (err == -EINTR) @@ -2511,13 +2513,13 @@ static int fuse_file_flock(struct file *file, int cmd, struct file_lock *fl) static sector_t fuse_bmap(struct address_space *mapping, sector_t block) { struct inode *inode = mapping->host; - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_bmap_in inarg; struct fuse_bmap_out outarg; int err; - if (!inode->i_sb->s_bdev || fc->no_bmap) + if (!inode->i_sb->s_bdev || fm->fc->no_bmap) return 0; memset(&inarg, 0, sizeof(inarg)); @@ -2531,9 +2533,9 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block) args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) - fc->no_bmap = 1; + fm->fc->no_bmap = 1; return err ? 0 : outarg.block; } @@ -2541,7 +2543,7 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block) static loff_t fuse_lseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_file *ff = file->private_data; FUSE_ARGS(args); struct fuse_lseek_in inarg = { @@ -2552,7 +2554,7 @@ static loff_t fuse_lseek(struct file *file, loff_t offset, int whence) struct fuse_lseek_out outarg; int err; - if (fc->no_lseek) + if (fm->fc->no_lseek) goto fallback; args.opcode = FUSE_LSEEK; @@ -2563,10 +2565,10 @@ static loff_t fuse_lseek(struct file *file, loff_t offset, int whence) args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err) { if (err == -ENOSYS) { - fc->no_lseek = 1; + fm->fc->no_lseek = 1; goto fallback; } return err; @@ -2752,7 +2754,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, unsigned int flags) { struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; struct fuse_ioctl_in inarg = { .fh = ff->fh, .cmd = cmd, @@ -2785,12 +2787,12 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, BUILD_BUG_ON(sizeof(struct fuse_ioctl_iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE); err = -ENOMEM; - ap.pages = fuse_pages_alloc(fc->max_pages, GFP_KERNEL, &ap.descs); + ap.pages = fuse_pages_alloc(fm->fc->max_pages, GFP_KERNEL, &ap.descs); iov_page = (struct iovec *) __get_free_page(GFP_KERNEL); if (!ap.pages || !iov_page) goto out; - fuse_page_descs_length_init(ap.descs, 0, fc->max_pages); + fuse_page_descs_length_init(ap.descs, 0, fm->fc->max_pages); /* * If restricted, initialize IO parameters as encoded in @cmd. @@ -2835,7 +2837,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, /* make sure there are enough buffer pages and init request with them */ err = -ENOMEM; - if (max_pages > fc->max_pages) + if (max_pages > fm->fc->max_pages) goto out; while (ap.num_pages < max_pages) { ap.pages[ap.num_pages] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); @@ -2872,7 +2874,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, ap.args.out_pages = true; ap.args.out_argvar = true; - transferred = fuse_simple_request(fc, &ap.args); + transferred = fuse_simple_request(fm, &ap.args); err = transferred; if (transferred < 0) goto out; @@ -2900,7 +2902,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, goto out; vaddr = kmap_atomic(ap.pages[0]); - err = fuse_copy_ioctl_iovec(fc, iov_page, vaddr, + err = fuse_copy_ioctl_iovec(fm->fc, iov_page, vaddr, transferred, in_iovs + out_iovs, (flags & FUSE_IOCTL_COMPAT) != 0); kunmap_atomic(vaddr); @@ -2910,11 +2912,11 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, in_iov = iov_page; out_iov = in_iov + in_iovs; - err = fuse_verify_ioctl_iov(fc, in_iov, in_iovs); + err = fuse_verify_ioctl_iov(fm->fc, in_iov, in_iovs); if (err) goto out; - err = fuse_verify_ioctl_iov(fc, out_iov, out_iovs); + err = fuse_verify_ioctl_iov(fm->fc, out_iov, out_iovs); if (err) goto out; @@ -3024,13 +3026,13 @@ static void fuse_register_polled_file(struct fuse_conn *fc, __poll_t fuse_file_poll(struct file *file, poll_table *wait) { struct fuse_file *ff = file->private_data; - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; struct fuse_poll_in inarg = { .fh = ff->fh, .kh = ff->kh }; struct fuse_poll_out outarg; FUSE_ARGS(args); int err; - if (fc->no_poll) + if (fm->fc->no_poll) return DEFAULT_POLLMASK; poll_wait(file, &ff->poll_wait, wait); @@ -3042,7 +3044,7 @@ __poll_t fuse_file_poll(struct file *file, poll_table *wait) */ if (waitqueue_active(&ff->poll_wait)) { inarg.flags |= FUSE_POLL_SCHEDULE_NOTIFY; - fuse_register_polled_file(fc, ff); + fuse_register_polled_file(fm->fc, ff); } args.opcode = FUSE_POLL; @@ -3053,12 +3055,12 @@ __poll_t fuse_file_poll(struct file *file, poll_table *wait) args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) return demangle_poll(outarg.revents); if (err == -ENOSYS) { - fc->no_poll = 1; + fm->fc->no_poll = 1; return DEFAULT_POLLMASK; } return EPOLLERR; @@ -3115,7 +3117,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) ssize_t ret = 0; struct file *file = iocb->ki_filp; struct fuse_file *ff = file->private_data; - bool async_dio = ff->fc->async_dio; + bool async_dio = ff->fm->fc->async_dio; loff_t pos = 0; struct inode *inode; loff_t i_size; @@ -3134,7 +3136,8 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) if (async_dio && iov_iter_rw(iter) != WRITE && offset + count > i_size) { if (offset >= i_size) return 0; - iov_iter_truncate(iter, fuse_round_up(ff->fc, i_size - offset)); + iov_iter_truncate(iter, fuse_round_up(ff->fm->fc, + i_size - offset)); count = iov_iter_count(iter); } @@ -3221,7 +3224,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, struct fuse_file *ff = file->private_data; struct inode *inode = file_inode(file); struct fuse_inode *fi = get_fuse_inode(inode); - struct fuse_conn *fc = ff->fc; + struct fuse_mount *fm = ff->fm; FUSE_ARGS(args); struct fuse_fallocate_in inarg = { .fh = ff->fh, @@ -3238,7 +3241,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; - if (fc->no_fallocate) + if (fm->fc->no_fallocate) return -EOPNOTSUPP; if (lock_inode) { @@ -3274,9 +3277,9 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, args.in_numargs = 1; args.in_args[0].size = sizeof(inarg); args.in_args[0].value = &inarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { - fc->no_fallocate = 1; + fm->fc->no_fallocate = 1; err = -EOPNOTSUPP; } if (err) @@ -3286,7 +3289,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, if (!(mode & FALLOC_FL_KEEP_SIZE)) { bool changed = fuse_write_update_size(inode, offset + length); - if (changed && fc->writeback_cache) + if (changed && fm->fc->writeback_cache) file_update_time(file); } @@ -3317,7 +3320,8 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in, struct inode *inode_in = file_inode(file_in); struct inode *inode_out = file_inode(file_out); struct fuse_inode *fi_out = get_fuse_inode(inode_out); - struct fuse_conn *fc = ff_in->fc; + struct fuse_mount *fm = ff_in->fm; + struct fuse_conn *fc = fm->fc; FUSE_ARGS(args); struct fuse_copy_file_range_in inarg = { .fh_in = ff_in->fh, @@ -3386,7 +3390,7 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in, args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { fc->no_copy_file_range = 1; err = -EOPNOTSUPP; diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 32e49afaf649..95b81a87941d 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -175,12 +175,13 @@ enum { }; struct fuse_conn; +struct fuse_mount; struct fuse_release_args; /** FUSE specific file data */ struct fuse_file { /** Fuse connection for this file */ - struct fuse_conn *fc; + struct fuse_mount *fm; /* Argument space reserved for release */ struct fuse_release_args *release_args; @@ -266,7 +267,7 @@ struct fuse_args { bool may_block:1; struct fuse_in_arg in_args[3]; struct fuse_arg out_args[2]; - void (*end)(struct fuse_conn *fc, struct fuse_args *args, int error); + void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error); }; struct fuse_args_pages { @@ -375,8 +376,8 @@ struct fuse_req { void *argbuf; #endif - /** fuse_conn this request belongs to */ - struct fuse_conn *fc; + /** fuse_mount this request belongs to */ + struct fuse_mount *fm; }; struct fuse_iqueue; @@ -515,9 +516,9 @@ struct fuse_fs_context { /** * A Fuse connection. * - * This structure is created, when the filesystem is mounted, and is - * destroyed, when the client device is closed and the filesystem is - * unmounted. + * This structure is created, when the root filesystem is mounted, and + * is destroyed, when the client device is closed and the last + * fuse_mount is destroyed. */ struct fuse_conn { /** Lock protecting accessess to members of this structure */ @@ -747,10 +748,10 @@ struct fuse_conn { /** Negotiated minor version */ unsigned minor; - /** Entry on the fuse_conn_list */ + /** Entry on the fuse_mount_list */ struct list_head entry; - /** Device ID from super block */ + /** Device ID from the root super block */ dev_t dev; /** Dentries in the control filesystem */ @@ -768,10 +769,10 @@ struct fuse_conn { /** Called on final put */ void (*release)(struct fuse_conn *); - /** Super block for this connection. */ - struct super_block *sb; - - /** Read/write semaphore to hold when accessing sb. */ + /** + * Read/write semaphore to hold when accessing the sb of any + * fuse_mount belonging to this connection + */ struct rw_semaphore killsb; /** List of device instances belonging to this connection */ @@ -781,16 +782,57 @@ struct fuse_conn { /* Dax specific conn data, non-NULL if DAX is enabled */ struct fuse_conn_dax *dax; #endif + + /** List of filesystems using this connection */ + struct list_head mounts; }; -static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) +/* + * Represents a mounted filesystem, potentially a submount. + * + * This object allows sharing a fuse_conn between separate mounts to + * allow submounts with dedicated superblocks and thus separate device + * IDs. + */ +struct fuse_mount { + /* Underlying (potentially shared) connection to the FUSE server */ + struct fuse_conn *fc; + + /* Refcount */ + refcount_t count; + + /* + * Super block for this connection (fc->killsb must be held when + * accessing this). + */ + struct super_block *sb; + + /* Entry on fc->mounts */ + struct list_head fc_entry; +}; + +static inline struct fuse_mount *get_fuse_mount_super(struct super_block *sb) { return sb->s_fs_info; } +static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) +{ + struct fuse_mount *fm = get_fuse_mount_super(sb); + + return fm ? fm->fc : NULL; +} + +static inline struct fuse_mount *get_fuse_mount(struct inode *inode) +{ + return get_fuse_mount_super(inode->i_sb); +} + static inline struct fuse_conn *get_fuse_conn(struct inode *inode) { - return get_fuse_conn_super(inode->i_sb); + struct fuse_mount *fm = get_fuse_mount(inode); + + return fm ? fm->fc : NULL; } static inline struct fuse_inode *get_fuse_inode(struct inode *inode) @@ -820,11 +862,6 @@ extern const struct dentry_operations fuse_dentry_operations; extern const struct dentry_operations fuse_root_dentry_operations; /** - * Inode to nodeid comparison. - */ -int fuse_inode_eq(struct inode *inode, void *_nodeidp); - -/** * Get a filled in inode */ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, @@ -874,7 +911,7 @@ void fuse_read_args_fill(struct fuse_io_args *ia, struct file *file, loff_t pos, */ int fuse_open_common(struct inode *inode, struct file *file, bool isdir); -struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); +struct fuse_file *fuse_file_alloc(struct fuse_mount *fm); void fuse_file_free(struct fuse_file *ff); void fuse_finish_open(struct inode *inode, struct file *file); @@ -942,8 +979,8 @@ void __exit fuse_ctl_cleanup(void); /** * Simple request sending that does request allocation and freeing */ -ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args); -int fuse_simple_background(struct fuse_conn *fc, struct fuse_args *args, +ssize_t fuse_simple_request(struct fuse_mount *fm, struct fuse_args *args); +int fuse_simple_background(struct fuse_mount *fm, struct fuse_args *args, gfp_t gfp_flags); /** @@ -975,7 +1012,8 @@ struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); /** * Initialize fuse_conn */ -void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, +void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm, + struct user_namespace *user_ns, const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv); /** @@ -983,11 +1021,21 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, */ void fuse_conn_put(struct fuse_conn *fc); +/** + * Acquire reference to fuse_mount + */ +struct fuse_mount *fuse_mount_get(struct fuse_mount *fm); + +/** + * Release reference to fuse_mount + */ +void fuse_mount_put(struct fuse_mount *fm); + struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc); struct fuse_dev *fuse_dev_alloc(void); void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc); void fuse_dev_free(struct fuse_dev *fud); -void fuse_send_init(struct fuse_conn *fc); +void fuse_send_init(struct fuse_mount *fm); /** * Fill in superblock and initialize fuse connection @@ -996,12 +1044,18 @@ void fuse_send_init(struct fuse_conn *fc); */ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx); -/** - * Disassociate fuse connection from superblock and kill the superblock + +/* + * Remove the mount from the connection * - * Calls kill_anon_super(), do not use with bdev mounts. + * Returns whether this was the last mount + */ +bool fuse_mount_remove(struct fuse_mount *fm); + +/* + * Shut down the connection (possibly sending DESTROY request). */ -void fuse_kill_sb_anon(struct super_block *sb); +void fuse_conn_destroy(struct fuse_mount *fm); /** * Add connection to control filesystem @@ -1037,9 +1091,19 @@ void fuse_set_nowrite(struct inode *inode); void fuse_release_nowrite(struct inode *inode); /** + * Scan all fuse_mounts belonging to fc to find the first where + * ilookup5() returns a result. Return that result and the + * respective fuse_mount in *fm (unless fm is NULL). + * + * The caller must hold fc->killsb. + */ +struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid, + struct fuse_mount **fm); + +/** * File-system tells the kernel to invalidate cache for the given node id. */ -int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, +int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid, loff_t offset, loff_t len); /** @@ -1052,10 +1116,10 @@ int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, * - is a file or oan empty directory * then the dentry is unhashed (d_delete()). */ -int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, +int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid, u64 child_nodeid, struct qstr *name); -int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, +int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file, bool isdir); /** diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index d252237219bf..8b34997a0eef 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -282,7 +282,7 @@ static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr) BUG(); } -int fuse_inode_eq(struct inode *inode, void *_nodeidp) +static int fuse_inode_eq(struct inode *inode, void *_nodeidp) { u64 nodeid = *(u64 *) _nodeidp; if (get_node_id(inode) == nodeid) @@ -334,16 +334,37 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid, return inode; } -int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, +struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid, + struct fuse_mount **fm) +{ + struct fuse_mount *fm_iter; + struct inode *inode; + + WARN_ON(!rwsem_is_locked(&fc->killsb)); + list_for_each_entry(fm_iter, &fc->mounts, fc_entry) { + if (!fm_iter->sb) + continue; + + inode = ilookup5(fm_iter->sb, nodeid, fuse_inode_eq, &nodeid); + if (inode) { + if (fm) + *fm = fm_iter; + return inode; + } + } + + return NULL; +} + +int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid, loff_t offset, loff_t len) { - struct fuse_conn *fc = get_fuse_conn_super(sb); struct fuse_inode *fi; struct inode *inode; pgoff_t pg_start; pgoff_t pg_end; - inode = ilookup5(sb, nodeid, fuse_inode_eq, &nodeid); + inode = fuse_ilookup(fc, nodeid, NULL); if (!inode) return -ENOENT; @@ -393,28 +414,23 @@ static void fuse_umount_begin(struct super_block *sb) fuse_abort_conn(fc); } -static void fuse_send_destroy(struct fuse_conn *fc) +static void fuse_send_destroy(struct fuse_mount *fm) { - if (fc->conn_init) { + if (fm->fc->conn_init) { FUSE_ARGS(args); args.opcode = FUSE_DESTROY; args.force = true; args.nocreds = true; - fuse_simple_request(fc, &args); + fuse_simple_request(fm, &args); } } static void fuse_put_super(struct super_block *sb) { - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); - mutex_lock(&fuse_mutex); - list_del(&fc->entry); - fuse_ctl_remove_conn(fc); - mutex_unlock(&fuse_mutex); - - fuse_conn_put(fc); + fuse_mount_put(fm); } static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr) @@ -434,12 +450,12 @@ static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); FUSE_ARGS(args); struct fuse_statfs_out outarg; int err; - if (!fuse_allow_current_process(fc)) { + if (!fuse_allow_current_process(fm->fc)) { buf->f_type = FUSE_SUPER_MAGIC; return 0; } @@ -451,7 +467,7 @@ static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf) args.out_numargs = 1; args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (!err) convert_fuse_statfs(buf, &outarg.st); return err; @@ -635,7 +651,8 @@ static void fuse_pqueue_init(struct fuse_pqueue *fpq) fpq->connected = 1; } -void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, +void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm, + struct user_namespace *user_ns, const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv) { memset(fc, 0, sizeof(*fc)); @@ -662,6 +679,11 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, fc->pid_ns = get_pid_ns(task_active_pid_ns(current)); fc->user_ns = get_user_ns(user_ns); fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ; + + INIT_LIST_HEAD(&fc->mounts); + list_add(&fm->fc_entry, &fc->mounts); + fm->fc = fc; + refcount_set(&fm->count, 1); } EXPORT_SYMBOL_GPL(fuse_conn_init); @@ -688,6 +710,23 @@ struct fuse_conn *fuse_conn_get(struct fuse_conn *fc) } EXPORT_SYMBOL_GPL(fuse_conn_get); +void fuse_mount_put(struct fuse_mount *fm) +{ + if (refcount_dec_and_test(&fm->count)) { + if (fm->fc) + fuse_conn_put(fm->fc); + kfree(fm); + } +} +EXPORT_SYMBOL_GPL(fuse_mount_put); + +struct fuse_mount *fuse_mount_get(struct fuse_mount *fm) +{ + refcount_inc(&fm->count); + return fm; +} +EXPORT_SYMBOL_GPL(fuse_mount_get); + static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode) { struct fuse_attr attr; @@ -917,9 +956,10 @@ struct fuse_init_args { struct fuse_init_out out; }; -static void process_init_reply(struct fuse_conn *fc, struct fuse_args *args, +static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args, int error) { + struct fuse_conn *fc = fm->fc; struct fuse_init_args *ia = container_of(args, typeof(*ia), args); struct fuse_init_out *arg = &ia->out; bool ok = true; @@ -973,11 +1013,11 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_args *args, if (arg->flags & FUSE_HANDLE_KILLPRIV) fc->handle_killpriv = 1; if (arg->time_gran && arg->time_gran <= 1000000000) - fc->sb->s_time_gran = arg->time_gran; + fm->sb->s_time_gran = arg->time_gran; if ((arg->flags & FUSE_POSIX_ACL)) { fc->default_permissions = 1; fc->posix_acl = 1; - fc->sb->s_xattr = fuse_acl_xattr_handlers; + fm->sb->s_xattr = fuse_acl_xattr_handlers; } if (arg->flags & FUSE_CACHE_SYMLINKS) fc->cache_symlinks = 1; @@ -999,8 +1039,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_args *args, fc->no_flock = 1; } - fc->sb->s_bdi->ra_pages = - min(fc->sb->s_bdi->ra_pages, ra_pages); + fm->sb->s_bdi->ra_pages = + min(fm->sb->s_bdi->ra_pages, ra_pages); fc->minor = arg->minor; fc->max_write = arg->minor < 5 ? 4096 : arg->max_write; fc->max_write = max_t(unsigned, 4096, fc->max_write); @@ -1017,7 +1057,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_args *args, wake_up_all(&fc->blocked_waitq); } -void fuse_send_init(struct fuse_conn *fc) +void fuse_send_init(struct fuse_mount *fm) { struct fuse_init_args *ia; @@ -1025,7 +1065,7 @@ void fuse_send_init(struct fuse_conn *fc) ia->in.major = FUSE_KERNEL_VERSION; ia->in.minor = FUSE_KERNEL_MINOR_VERSION; - ia->in.max_readahead = fc->sb->s_bdi->ra_pages * PAGE_SIZE; + ia->in.max_readahead = fm->sb->s_bdi->ra_pages * PAGE_SIZE; ia->in.flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC | FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK | @@ -1037,7 +1077,7 @@ void fuse_send_init(struct fuse_conn *fc) FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS | FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA; #ifdef CONFIG_FUSE_DAX - if (fc->dax) + if (fm->fc->dax) ia->in.flags |= FUSE_MAP_ALIGNMENT; #endif ia->args.opcode = FUSE_INIT; @@ -1055,8 +1095,8 @@ void fuse_send_init(struct fuse_conn *fc) ia->args.nocreds = true; ia->args.end = process_init_reply; - if (fuse_simple_background(fc, &ia->args, GFP_KERNEL) != 0) - process_init_reply(fc, &ia->args, -ENOTCONN); + if (fuse_simple_background(fm, &ia->args, GFP_KERNEL) != 0) + process_init_reply(fm, &ia->args, -ENOTCONN); } EXPORT_SYMBOL_GPL(fuse_send_init); @@ -1170,7 +1210,8 @@ EXPORT_SYMBOL_GPL(fuse_dev_free); int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx) { struct fuse_dev *fud = NULL; - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); + struct fuse_conn *fc = fm->fc; struct inode *root; struct dentry *root_dentry; int err; @@ -1225,7 +1266,7 @@ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx) } fc->dev = sb->s_dev; - fc->sb = sb; + fm->sb = sb; err = fuse_bdi_init(fc, sb); if (err) goto err_dev_free; @@ -1290,6 +1331,7 @@ static int fuse_fill_super(struct super_block *sb, struct fs_context *fsc) struct file *file; int err; struct fuse_conn *fc; + struct fuse_mount *fm; err = -EINVAL; file = fget(ctx->fd); @@ -1310,9 +1352,16 @@ static int fuse_fill_super(struct super_block *sb, struct fs_context *fsc) if (!fc) goto err_fput; - fuse_conn_init(fc, sb->s_user_ns, &fuse_dev_fiq_ops, NULL); + fm = kzalloc(sizeof(*fm), GFP_KERNEL); + if (!fm) { + kfree(fc); + goto err_fput; + } + + fuse_conn_init(fc, fm, sb->s_user_ns, &fuse_dev_fiq_ops, NULL); fc->release = fuse_free_conn; - sb->s_fs_info = fc; + + sb->s_fs_info = fm; err = fuse_fill_super_common(sb, ctx); if (err) @@ -1323,11 +1372,11 @@ static int fuse_fill_super(struct super_block *sb, struct fs_context *fsc) * CPUs after this */ fput(file); - fuse_send_init(get_fuse_conn_super(sb)); + fuse_send_init(get_fuse_mount_super(sb)); return 0; err_put_conn: - fuse_conn_put(fc); + fuse_mount_put(fm); sb->s_fs_info = NULL; err_fput: fput(file); @@ -1385,29 +1434,45 @@ static int fuse_init_fs_context(struct fs_context *fc) return 0; } -static void fuse_sb_destroy(struct super_block *sb) +bool fuse_mount_remove(struct fuse_mount *fm) { - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_conn *fc = fm->fc; + bool last = false; - if (fc) { - if (fc->destroy) - fuse_send_destroy(fc); + down_write(&fc->killsb); + list_del_init(&fm->fc_entry); + if (list_empty(&fc->mounts)) + last = true; + up_write(&fc->killsb); - fuse_abort_conn(fc); - fuse_wait_aborted(fc); + return last; +} +EXPORT_SYMBOL_GPL(fuse_mount_remove); - down_write(&fc->killsb); - fc->sb = NULL; - up_write(&fc->killsb); - } +void fuse_conn_destroy(struct fuse_mount *fm) +{ + struct fuse_conn *fc = fm->fc; + + if (fc->destroy) + fuse_send_destroy(fm); + + fuse_abort_conn(fc); + fuse_wait_aborted(fc); } +EXPORT_SYMBOL_GPL(fuse_conn_destroy); -void fuse_kill_sb_anon(struct super_block *sb) +static void fuse_kill_sb_anon(struct super_block *sb) { - fuse_sb_destroy(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); + bool last; + + if (fm) { + last = fuse_mount_remove(fm); + if (last) + fuse_conn_destroy(fm); + } kill_anon_super(sb); } -EXPORT_SYMBOL_GPL(fuse_kill_sb_anon); static struct file_system_type fuse_fs_type = { .owner = THIS_MODULE, @@ -1422,7 +1487,14 @@ MODULE_ALIAS_FS("fuse"); #ifdef CONFIG_BLOCK static void fuse_kill_sb_blk(struct super_block *sb) { - fuse_sb_destroy(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); + bool last; + + if (fm) { + last = fuse_mount_remove(fm); + if (last) + fuse_conn_destroy(fm); + } kill_block_super(sb); } diff --git a/fs/fuse/readdir.c b/fs/fuse/readdir.c index 90e3f01bd796..3b5e91045871 100644 --- a/fs/fuse/readdir.c +++ b/fs/fuse/readdir.c @@ -252,7 +252,7 @@ retry: static void fuse_force_forget(struct file *file, u64 nodeid) { struct inode *inode = file_inode(file); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_forget_in inarg; FUSE_ARGS(args); @@ -266,7 +266,7 @@ static void fuse_force_forget(struct file *file, u64 nodeid) args.force = true; args.noreply = true; - fuse_simple_request(fc, &args); + fuse_simple_request(fm, &args); /* ignore errors */ } @@ -320,7 +320,7 @@ static int fuse_readdir_uncached(struct file *file, struct dir_context *ctx) ssize_t res; struct page *page; struct inode *inode = file_inode(file); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); struct fuse_io_args ia = {}; struct fuse_args_pages *ap = &ia.ap; struct fuse_page_desc desc = { .length = PAGE_SIZE }; @@ -337,7 +337,7 @@ static int fuse_readdir_uncached(struct file *file, struct dir_context *ctx) ap->pages = &page; ap->descs = &desc; if (plus) { - attr_version = fuse_get_attr_version(fc); + attr_version = fuse_get_attr_version(fm->fc); fuse_read_args_fill(&ia, file, ctx->pos, PAGE_SIZE, FUSE_READDIRPLUS); } else { @@ -345,7 +345,7 @@ static int fuse_readdir_uncached(struct file *file, struct dir_context *ctx) FUSE_READDIR); } locked = fuse_lock_inode(inode); - res = fuse_simple_request(fc, &ap->args); + res = fuse_simple_request(fm, &ap->args); fuse_unlock_inode(inode, locked); if (res >= 0) { if (!res) { diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 9c23e40e07fe..746fa1a40975 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1270,7 +1270,8 @@ static inline void virtio_fs_ctx_set_defaults(struct fuse_fs_context *ctx) static int virtio_fs_fill_super(struct super_block *sb, struct fs_context *fsc) { - struct fuse_conn *fc = get_fuse_conn_super(sb); + struct fuse_mount *fm = get_fuse_mount_super(sb); + struct fuse_conn *fc = fm->fc; struct virtio_fs *fs = fc->iq.priv; struct fuse_fs_context *ctx = fsc->fs_private; unsigned int i; @@ -1315,7 +1316,7 @@ static int virtio_fs_fill_super(struct super_block *sb, struct fs_context *fsc) /* Previous unmount will stop all queues. Start these again */ virtio_fs_start_all_queues(fs); - fuse_send_init(fc); + fuse_send_init(fm); mutex_unlock(&virtio_fs_mutex); return 0; @@ -1326,21 +1327,14 @@ err: return err; } -static void virtio_kill_sb(struct super_block *sb) +static void virtio_fs_conn_destroy(struct fuse_mount *fm) { - struct fuse_conn *fc = get_fuse_conn_super(sb); - struct virtio_fs *vfs; - struct virtio_fs_vq *fsvq; - - /* If mount failed, we can still be called without any fc */ - if (!fc) - return fuse_kill_sb_anon(sb); - - vfs = fc->iq.priv; - fsvq = &vfs->vqs[VQ_HIPRIO]; + struct fuse_conn *fc = fm->fc; + struct virtio_fs *vfs = fc->iq.priv; + struct virtio_fs_vq *fsvq = &vfs->vqs[VQ_HIPRIO]; - /* Stop dax worker. Soon evict_inodes() will be called which will - * free all memory ranges belonging to all inodes. + /* Stop dax worker. Soon evict_inodes() will be called which + * will free all memory ranges belonging to all inodes. */ if (IS_ENABLED(CONFIG_FUSE_DAX)) fuse_dax_cancel_work(fc); @@ -1351,9 +1345,9 @@ static void virtio_kill_sb(struct super_block *sb) spin_unlock(&fsvq->lock); virtio_fs_drain_all_queues(vfs); - fuse_kill_sb_anon(sb); + fuse_conn_destroy(fm); - /* fuse_kill_sb_anon() must have sent destroy. Stop all queues + /* fuse_conn_destroy() must have sent destroy. Stop all queues * and drain one more time and free fuse devices. Freeing fuse * devices will drop their reference on fuse_conn and that in * turn will drop its reference on virtio_fs object. @@ -1363,12 +1357,27 @@ static void virtio_kill_sb(struct super_block *sb) virtio_fs_free_devs(vfs); } +static void virtio_kill_sb(struct super_block *sb) +{ + struct fuse_mount *fm = get_fuse_mount_super(sb); + bool last; + + /* If mount failed, we can still be called without any fc */ + if (fm) { + last = fuse_mount_remove(fm); + if (last) + virtio_fs_conn_destroy(fm); + } + kill_anon_super(sb); +} + static int virtio_fs_test_super(struct super_block *sb, struct fs_context *fsc) { - struct fuse_conn *fc = fsc->s_fs_info; + struct fuse_mount *fsc_fm = fsc->s_fs_info; + struct fuse_mount *sb_fm = get_fuse_mount_super(sb); - return fc->iq.priv == get_fuse_conn_super(sb)->iq.priv; + return fsc_fm->fc->iq.priv == sb_fm->fc->iq.priv; } static int virtio_fs_set_super(struct super_block *sb, @@ -1378,7 +1387,7 @@ static int virtio_fs_set_super(struct super_block *sb, err = get_anon_bdev(&sb->s_dev); if (!err) - fuse_conn_get(fsc->s_fs_info); + fuse_mount_get(fsc->s_fs_info); return err; } @@ -1388,6 +1397,7 @@ static int virtio_fs_get_tree(struct fs_context *fsc) struct virtio_fs *fs; struct super_block *sb; struct fuse_conn *fc; + struct fuse_mount *fm; int err; /* This gets a reference on virtio_fs object. This ptr gets installed @@ -1408,14 +1418,23 @@ static int virtio_fs_get_tree(struct fs_context *fsc) return -ENOMEM; } - fuse_conn_init(fc, get_user_ns(current_user_ns()), &virtio_fs_fiq_ops, - fs); + fm = kzalloc(sizeof(struct fuse_mount), GFP_KERNEL); + if (!fm) { + mutex_lock(&virtio_fs_mutex); + virtio_fs_put(fs); + mutex_unlock(&virtio_fs_mutex); + kfree(fc); + return -ENOMEM; + } + + fuse_conn_init(fc, fm, get_user_ns(current_user_ns()), + &virtio_fs_fiq_ops, fs); fc->release = fuse_free_conn; fc->delete_stale = true; - fsc->s_fs_info = fc; + fsc->s_fs_info = fm; sb = sget_fc(fsc, virtio_fs_test_super, virtio_fs_set_super); - fuse_conn_put(fc); + fuse_mount_put(fm); if (IS_ERR(sb)) return PTR_ERR(sb); diff --git a/fs/fuse/xattr.c b/fs/fuse/xattr.c index 20d052e08b3b..371bdcbc7233 100644 --- a/fs/fuse/xattr.c +++ b/fs/fuse/xattr.c @@ -14,12 +14,12 @@ int fuse_setxattr(struct inode *inode, const char *name, const void *value, size_t size, int flags) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_setxattr_in inarg; int err; - if (fc->no_setxattr) + if (fm->fc->no_setxattr) return -EOPNOTSUPP; memset(&inarg, 0, sizeof(inarg)); @@ -34,9 +34,9 @@ int fuse_setxattr(struct inode *inode, const char *name, const void *value, args.in_args[1].value = name; args.in_args[2].size = size; args.in_args[2].value = value; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { - fc->no_setxattr = 1; + fm->fc->no_setxattr = 1; err = -EOPNOTSUPP; } if (!err) { @@ -49,13 +49,13 @@ int fuse_setxattr(struct inode *inode, const char *name, const void *value, ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value, size_t size) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_getxattr_in inarg; struct fuse_getxattr_out outarg; ssize_t ret; - if (fc->no_getxattr) + if (fm->fc->no_getxattr) return -EOPNOTSUPP; memset(&inarg, 0, sizeof(inarg)); @@ -77,11 +77,11 @@ ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value, args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; } - ret = fuse_simple_request(fc, &args); + ret = fuse_simple_request(fm, &args); if (!ret && !size) ret = min_t(ssize_t, outarg.size, XATTR_SIZE_MAX); if (ret == -ENOSYS) { - fc->no_getxattr = 1; + fm->fc->no_getxattr = 1; ret = -EOPNOTSUPP; } return ret; @@ -107,16 +107,16 @@ static int fuse_verify_xattr_list(char *list, size_t size) ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) { struct inode *inode = d_inode(entry); - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); struct fuse_getxattr_in inarg; struct fuse_getxattr_out outarg; ssize_t ret; - if (!fuse_allow_current_process(fc)) + if (!fuse_allow_current_process(fm->fc)) return -EACCES; - if (fc->no_listxattr) + if (fm->fc->no_listxattr) return -EOPNOTSUPP; memset(&inarg, 0, sizeof(inarg)); @@ -136,13 +136,13 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) args.out_args[0].size = sizeof(outarg); args.out_args[0].value = &outarg; } - ret = fuse_simple_request(fc, &args); + ret = fuse_simple_request(fm, &args); if (!ret && !size) ret = min_t(ssize_t, outarg.size, XATTR_LIST_MAX); if (ret > 0 && size) ret = fuse_verify_xattr_list(list, ret); if (ret == -ENOSYS) { - fc->no_listxattr = 1; + fm->fc->no_listxattr = 1; ret = -EOPNOTSUPP; } return ret; @@ -150,11 +150,11 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) int fuse_removexattr(struct inode *inode, const char *name) { - struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_mount *fm = get_fuse_mount(inode); FUSE_ARGS(args); int err; - if (fc->no_removexattr) + if (fm->fc->no_removexattr) return -EOPNOTSUPP; args.opcode = FUSE_REMOVEXATTR; @@ -162,9 +162,9 @@ int fuse_removexattr(struct inode *inode, const char *name) args.in_numargs = 1; args.in_args[0].size = strlen(name) + 1; args.in_args[0].value = name; - err = fuse_simple_request(fc, &args); + err = fuse_simple_request(fm, &args); if (err == -ENOSYS) { - fc->no_removexattr = 1; + fm->fc->no_removexattr = 1; err = -EOPNOTSUPP; } if (!err) { |