diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index e4ada021d087..d4c869c6d01b 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -103,19 +103,8 @@ static struct fuse_req *do_get_request(struct fuse_conn *fc) return req; } +/* This can return NULL, but only in case it's interrupted by a SIGKILL */ struct fuse_req *fuse_get_request(struct fuse_conn *fc) -{ - if (down_interruptible(&fc->outstanding_sem)) - return NULL; - return do_get_request(fc); -} - -/* - * Non-interruptible version of the above function is for operations - * which can't legally return -ERESTART{SYS,NOINTR}. This can still - * return NULL, but only in case the signal is SIGKILL. - */ -struct fuse_req *fuse_get_request_nonint(struct fuse_conn *fc) { int intr; sigset_t oldset; @@ -241,43 +230,20 @@ static void background_request(struct fuse_conn *fc, struct fuse_req *req) get_file(req->file); } -static int request_wait_answer_nonint(struct fuse_req *req) -{ - int err; - sigset_t oldset; - block_sigs(&oldset); - err = wait_event_interruptible(req->waitq, req->finished); - restore_sigs(&oldset); - return err; -} - /* Called with fuse_lock held. Releases, and then reacquires it. */ -static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req, - int interruptible) +static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req) { - int intr; + sigset_t oldset; spin_unlock(&fuse_lock); - if (interruptible) - intr = wait_event_interruptible(req->waitq, req->finished); - else - intr = request_wait_answer_nonint(req); + block_sigs(&oldset); + wait_event_interruptible(req->waitq, req->finished); + restore_sigs(&oldset); spin_lock(&fuse_lock); - if (intr && interruptible && req->sent) { - /* If request is already in userspace, only allow KILL - signal to interrupt */ - spin_unlock(&fuse_lock); - intr = request_wait_answer_nonint(req); - spin_lock(&fuse_lock); - } - if (!intr) + if (req->finished) return; - if (!interruptible || req->sent) - req->out.h.error = -EINTR; - else - req->out.h.error = -ERESTARTNOINTR; - + req->out.h.error = -EINTR; req->interrupted = 1; if (req->locked) { /* This is uninterruptible sleep, because data is @@ -330,8 +296,10 @@ static void queue_request(struct fuse_conn *fc, struct fuse_req *req) wake_up(&fc->waitq); } -static void request_send_wait(struct fuse_conn *fc, struct fuse_req *req, - int interruptible) +/* + * This can only be interrupted by a SIGKILL + */ +void request_send(struct fuse_conn *fc, struct fuse_req *req) { req->isreply = 1; spin_lock(&fuse_lock); @@ -345,26 +313,11 @@ static void request_send_wait(struct fuse_conn *fc, struct fuse_req *req, after request_end() */ __fuse_get_request(req); - request_wait_answer(fc, req, interruptible); + request_wait_answer(fc, req); } spin_unlock(&fuse_lock); } -void request_send(struct fuse_conn *fc, struct fuse_req *req) -{ - request_send_wait(fc, req, 1); -} - -/* - * Non-interruptible version of the above function is for operations - * which can't legally return -ERESTART{SYS,NOINTR}. This can still - * be interrupted but only with SIGKILL. - */ -void request_send_nonint(struct fuse_conn *fc, struct fuse_req *req) -{ - request_send_wait(fc, req, 0); -} - static void request_send_nowait(struct fuse_conn *fc, struct fuse_req *req) { spin_lock(&fuse_lock); diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 73792d65b6cf..e79e49b3eec7 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -46,12 +46,12 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) struct inode *inode = entry->d_inode; struct fuse_inode *fi = get_fuse_inode(inode); struct fuse_conn *fc = get_fuse_conn(inode); - struct fuse_req *req = fuse_get_request_nonint(fc); + struct fuse_req *req = fuse_get_request(fc); if (!req) return 0; fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg); - request_send_nonint(fc, req); + request_send(fc, req); err = req->out.h.error; if (!err) { if (outarg.nodeid != get_node_id(inode)) { @@ -91,7 +91,7 @@ static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; fuse_lookup_init(req, dir, entry, &outarg); request_send(fc, req); @@ -185,7 +185,7 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.mode = mode; @@ -211,7 +211,7 @@ static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.mode = mode; @@ -236,7 +236,7 @@ static int fuse_symlink(struct inode *dir, struct dentry *entry, req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; req->in.h.opcode = FUSE_SYMLINK; req->in.numargs = 2; @@ -253,7 +253,7 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; req->in.h.opcode = FUSE_UNLINK; req->in.h.nodeid = get_node_id(dir); @@ -284,7 +284,7 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry) struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; req->in.h.opcode = FUSE_RMDIR; req->in.h.nodeid = get_node_id(dir); @@ -311,7 +311,7 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent, struct fuse_conn *fc = get_fuse_conn(olddir); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.newdir = get_node_id(newdir); @@ -356,7 +356,7 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.oldnodeid = get_node_id(inode); @@ -386,7 +386,7 @@ int fuse_do_getattr(struct inode *inode) struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; req->in.h.opcode = FUSE_GETATTR; req->in.h.nodeid = get_node_id(inode); @@ -533,7 +533,7 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) struct page *page; struct inode *inode = file->f_dentry->d_inode; struct fuse_conn *fc = get_fuse_conn(inode); - struct fuse_req *req = fuse_get_request_nonint(fc); + struct fuse_req *req = fuse_get_request(fc); if (!req) return -EINTR; @@ -564,7 +564,7 @@ static char *read_link(struct dentry *dentry) char *link; if (!req) - return ERR_PTR(-ERESTARTNOINTR); + return ERR_PTR(-EINTR); link = (char *) __get_free_page(GFP_KERNEL); if (!link) { @@ -677,7 +677,7 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr) req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.valid = iattr_to_fattr(attr, &inarg.attr); @@ -761,7 +761,7 @@ static int fuse_setxattr(struct dentry *entry, const char *name, req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.size = size; @@ -801,7 +801,7 @@ static ssize_t fuse_getxattr(struct dentry *entry, const char *name, req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.size = size; @@ -851,7 +851,7 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.size = size; @@ -897,7 +897,7 @@ static int fuse_removexattr(struct dentry *entry, const char *name) req = fuse_get_request(fc); if (!req) - return -ERESTARTNOINTR; + return -EINTR; req->in.h.opcode = FUSE_REMOVEXATTR; req->in.h.nodeid = get_node_id(inode); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index e225f8c0b267..6454022b0536 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -22,9 +22,6 @@ int fuse_open_common(struct inode *inode, struct file *file, int isdir) struct fuse_open_out outarg; struct fuse_file *ff; int err; - /* Restarting the syscall is not allowed if O_CREAT and O_EXCL - are both set, because creation will fail on the restart */ - int excl = (file->f_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL); err = generic_file_open(inode, file); if (err) @@ -38,12 +35,9 @@ int fuse_open_common(struct inode *inode, struct file *file, int isdir) return err; } - if (excl) - req = fuse_get_request_nonint(fc); - else - req = fuse_get_request(fc); + req = fuse_get_request(fc); if (!req) - return excl ? -EINTR : -ERESTARTSYS; + return -EINTR; err = -ENOMEM; ff = kmalloc(sizeof(struct fuse_file), GFP_KERNEL); @@ -67,10 +61,7 @@ int fuse_open_common(struct inode *inode, struct file *file, int isdir) req->out.numargs = 1; req->out.args[0].size = sizeof(outarg); req->out.args[0].value = &outarg; - if (excl) - request_send_nonint(fc, req); - else - request_send(fc, req); + request_send(fc, req); err = req->out.h.error; if (err) { fuse_request_free(ff->release_req); @@ -133,7 +124,7 @@ static int fuse_flush(struct file *file) if (fc->no_flush) return 0; - req = fuse_get_request_nonint(fc); + req = fuse_get_request(fc); if (!req) return -EINTR; @@ -146,7 +137,7 @@ static int fuse_flush(struct file *file) req->in.numargs = 1; req->in.args[0].size = sizeof(inarg); req->in.args[0].value = &inarg; - request_send_nonint(fc, req); + request_send(fc, req); err = req->out.h.error; fuse_put_request(fc, req); if (err == -ENOSYS) { @@ -171,7 +162,7 @@ int fuse_fsync_common(struct file *file, struct dentry *de, int datasync, req = fuse_get_request(fc); if (!req) - return -ERESTARTSYS; + return -EINTR; memset(&inarg, 0, sizeof(inarg)); inarg.fh = ff->fh; @@ -224,7 +215,7 @@ size_t fuse_send_read_common(struct fuse_req *req, struct file *file, req->out.argvar = 1; req->out.numargs = 1; req->out.args[0].size = count; - request_send_nonint(fc, req); + request_send(fc, req); return req->out.args[0].size; } @@ -240,7 +231,7 @@ static int fuse_readpage(struct file *file, struct page *page) struct inode *inode = page->mapping->host; struct fuse_conn *fc = get_fuse_conn(inode); loff_t pos = (loff_t) page->index << PAGE_CACHE_SHIFT; - struct fuse_req *req = fuse_get_request_nonint(fc); + struct fuse_req *req = fuse_get_request(fc); int err = -EINTR; if (!req) goto out; @@ -314,7 +305,7 @@ static int fuse_readpages(struct file *file, struct address_space *mapping, int err; data.file = file; data.inode = inode; - data.req = fuse_get_request_nonint(fc); + data.req = fuse_get_request(fc); if (!data.req) return -EINTR; @@ -350,7 +341,7 @@ static size_t fuse_send_write(struct fuse_req *req, struct file *file, req->out.numargs = 1; req->out.args[0].size = sizeof(struct fuse_write_out); req->out.args[0].value = &outarg; - request_send_nonint(fc, req); + request_send(fc, req); return outarg.size; } @@ -370,7 +361,7 @@ static int fuse_commit_write(struct file *file, struct page *page, struct inode *inode = page->mapping->host; struct fuse_conn *fc = get_fuse_conn(inode); loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + offset; - struct fuse_req *req = fuse_get_request_nonint(fc); + struct fuse_req *req = fuse_get_request(fc); if (!req) return -EINTR; @@ -444,7 +435,7 @@ static ssize_t fuse_direct_io(struct file *file, const char __user *buf, ssize_t res = 0; struct fuse_req *req = fuse_get_request(fc); if (!req) - return -ERESTARTSYS; + return -EINTR; while (count) { size_t tmp; diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index d7647289d8a1..24d761518d86 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -409,11 +409,6 @@ void fuse_reset_request(struct fuse_req *req); */ struct fuse_req *fuse_get_request(struct fuse_conn *fc); -/** - * Reserve a preallocated request, only interruptible by SIGKILL - */ -struct fuse_req *fuse_get_request_nonint(struct fuse_conn *fc); - /** * Decrement reference count of a request. If count goes to zero put * on unused list (preallocated) or free reqest (not preallocated). @@ -421,15 +416,10 @@ struct fuse_req *fuse_get_request_nonint(struct fuse_conn *fc); void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); /** - * Send a request (synchronous, interruptible) + * Send a request (synchronous) */ void request_send(struct fuse_conn *fc, struct fuse_req *req); -/** - * Send a request (synchronous, non-interruptible except by SIGKILL) - */ -void request_send_nonint(struct fuse_conn *fc, struct fuse_req *req); - /** * Send a request with no reply */ diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 52e954f4bb91..e69a546844d0 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -236,7 +236,7 @@ static int fuse_statfs(struct super_block *sb, struct kstatfs *buf) req = fuse_get_request(fc); if (!req) - return -ERESTARTSYS; + return -EINTR; req->in.numargs = 0; req->in.h.opcode = FUSE_STATFS;