/* FUSE: Filesystem in Userspace Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu> This program can be distributed under the terms of the GNU GPL. See the file COPYING.*/ #include "fuse_i.h" #include <linux/pagemap.h>#include <linux/file.h>#include <linux/sched.h>#include <linux/namei.h>#include <linux/slab.h> static bool fuse_use_readdirplus(struct inode *dir, struct dir_context *ctx){ struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_inode *fi = get_fuse_inode(dir); if (!fc->do_readdirplus) return false; if (!fc->readdirplus_auto) return true; if (test_and_clear_bit(FUSE_I_ADVISE_RDPLUS, &fi->state)) return true; if (ctx->pos == 0) return true; return false;} static void fuse_advise_use_readdirplus(struct inode *dir){ struct fuse_inode *fi = get_fuse_inode(dir); set_bit(FUSE_I_ADVISE_RDPLUS, &fi->state);} #if BITS_PER_LONG >= 64static inline void fuse_dentry_settime(struct dentry *entry, u64 time){ entry->d_time = time;} static inline u64 fuse_dentry_time(struct dentry *entry){ return entry->d_time;}#else/* * On 32 bit archs store the high 32 bits of time in d_fsdata */static void fuse_dentry_settime(struct dentry *entry, u64 time){ entry->d_time = time; entry->d_fsdata = (void *) (unsigned long) (time >> 32);} static u64 fuse_dentry_time(struct dentry *entry){ return (u64) entry->d_time + ((u64) (unsigned long) entry->d_fsdata << 32);}#endif /* * FUSE caches dentries and attributes with separate timeout. The * time in jiffies until the dentry/attributes are valid is stored in * dentry->d_time and fuse_inode->i_time respectively. */ /* * Calculate the time in jiffies until a dentry/attributes are valid */static u64 time_to_jiffies(unsigned long sec, unsigned long nsec){ if (sec || nsec) { struct timespec ts = {sec, nsec}; return get_jiffies_64() + timespec_to_jiffies(&ts); } else return 0;} /* * Set dentry and possibly attribute timeouts from the lookup/mk* * replies */static void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o){ fuse_dentry_settime(entry, time_to_jiffies(o->entry_valid, o->entry_valid_nsec));} static u64 attr_timeout(struct fuse_attr_out *o){ return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);} static u64 entry_attr_timeout(struct fuse_entry_out *o){ return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);} /* * Mark the attributes as stale, so that at the next call to * ->getattr() they will be fetched from userspace */void fuse_invalidate_attr(struct inode *inode){ get_fuse_inode(inode)->i_time = 0;} /* * Just mark the entry as stale, so that a next attempt to look it up * will result in a new lookup call to userspace * * This is called when a dentry is about to become negative and the * timeout is unknown (unlink, rmdir, rename and in some cases * lookup) */void fuse_invalidate_entry_cache(struct dentry *entry){ fuse_dentry_settime(entry, 0);} /* * Same as fuse_invalidate_entry_cache(), but also try to remove the * dentry from the hash */static void fuse_invalidate_entry(struct dentry *entry){ d_invalidate(entry); fuse_invalidate_entry_cache(entry);} static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_req *req, u64 nodeid, struct qstr *name, struct fuse_entry_out *outarg){ memset(outarg, 0, sizeof(struct fuse_entry_out)); req->in.h.opcode = FUSE_LOOKUP; req->in.h.nodeid = nodeid; req->in.numargs = 1; req->in.args[0].size = name->len + 1; req->in.args[0].value = name->name; req->out.numargs = 1; if (fc->minor < 9) req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; else req->out.args[0].size = sizeof(struct fuse_entry_out); req->out.args[0].value = outarg;} u64 fuse_get_attr_version(struct fuse_conn *fc){ u64 curr_version; /* * The spin lock isn't actually needed on 64bit archs, but we * don't yet care too much about such optimizations. */ spin_lock(&fc->lock); curr_version = fc->attr_version; spin_unlock(&fc->lock); return curr_version;} /* * Check whether the dentry is still valid * * If the entry validity timeout has expired and the dentry is * positive, try to redo the lookup. If the lookup results in a * different inode, then let the VFS invalidate the dentry and redo * the lookup once more. If the lookup results in the same inode, * then refresh the attributes, timeouts and mark the dentry valid. */static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags){ struct inode *inode; struct dentry *parent; struct fuse_conn *fc; struct fuse_inode *fi; int ret; inode = ACCESS_ONCE(entry->d_inode); if (inode && is_bad_inode(inode)) goto invalid; else if (fuse_dentry_time(entry) < get_jiffies_64()) { int err; struct fuse_entry_out outarg; struct fuse_req *req; struct fuse_forget_link *forget; u64 attr_version; /* For negative dentries, always do a fresh lookup */ if (!inode) goto invalid; ret = -ECHILD; if (flags & LOOKUP_RCU) goto out; fc = get_fuse_conn(inode); req = fuse_get_req_nopages(fc); ret = PTR_ERR(req); if (IS_ERR(req)) goto out; forget = fuse_alloc_forget(); if (!forget) { fuse_put_request(fc, req); ret = -ENOMEM; goto out; } attr_version = fuse_get_attr_version(fc); parent = dget_parent(entry); fuse_lookup_init(fc, req, get_node_id(parent->d_inode), &entry->d_name, &outarg); fuse_request_send(fc, req); dput(parent); err = req->out.h.error; fuse_put_request(fc, req); /* Zero nodeid is same as -ENOENT */ if (!err && !outarg.nodeid) err = -ENOENT; if (!err) { fi = get_fuse_inode(inode); if (outarg.nodeid != get_node_id(inode)) { fuse_queue_forget(fc, forget, outarg.nodeid, 1); goto invalid; } spin_lock(&fc->lock); fi->nlookup++; spin_unlock(&fc->lock); } kfree(forget); if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) goto invalid; fuse_change_attributes(inode, &outarg.attr, entry_attr_timeout(&outarg), attr_version); fuse_change_entry_timeout(entry, &outarg); } else if (inode) { fi = get_fuse_inode(inode); if (flags & LOOKUP_RCU) { if (test_bit(FUSE_I_INIT_RDPLUS, &fi->state)) return -ECHILD; } else if (test_and_clear_bit(FUSE_I_INIT_RDPLUS, &fi->state)) { parent = dget_parent(entry); fuse_advise_use_readdirplus(parent->d_inode); dput(parent); } } ret = 1;out: return ret; invalid: ret = 0; if (!(flags & LOOKUP_RCU) && check_submounts_and_drop(entry) != 0) ret = 1; goto out;} static int invalid_nodeid(u64 nodeid){ return !nodeid || nodeid == FUSE_ROOT_ID;} const struct dentry_operations fuse_dentry_operations = { .d_revalidate = fuse_dentry_revalidate,}; int fuse_valid_type(int m){ return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) || S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m);} int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, struct fuse_entry_out *outarg, struct inode **inode){ struct fuse_conn *fc = get_fuse_conn_super(sb); struct fuse_req *req; struct fuse_forget_link *forget; u64 attr_version; int err; *inode = NULL; err = -ENAMETOOLONG; if (name->len > FUSE_NAME_MAX) goto out; req = fuse_get_req_nopages(fc); err = PTR_ERR(req); if (IS_ERR(req)) goto out; forget = fuse_alloc_forget(); err = -ENOMEM; if (!forget) { fuse_put_request(fc, req); goto out; } attr_version = fuse_get_attr_version(fc); fuse_lookup_init(fc, req, nodeid, name, outarg); fuse_request_send(fc, req); err = req->out.h.error; fuse_put_request(fc, req); /* Zero nodeid is same as -ENOENT, but with valid timeout */ if (err || !outarg->nodeid) goto out_put_forget; err = -EIO; if (!outarg->nodeid) goto out_put_forget; if (!fuse_valid_type(outarg->attr.mode)) goto out_put_forget; *inode = fuse_iget(sb, outarg->nodeid, outarg->generation, &outarg->attr, entry_attr_timeout(outarg), attr_version); err = -ENOMEM; if (!*inode) { fuse_queue_forget(fc, forget, outarg->nodeid, 1); goto out; } err = 0; out_put_forget: kfree(forget); out: return err;} static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, unsigned int flags){ int err; struct fuse_entry_out outarg; struct inode *inode; struct dentry *newent; bool outarg_valid = true; err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, &outarg, &inode); if (err == -ENOENT) { outarg_valid = false; err = 0; } if (err) goto out_err; err = -EIO; if (inode && get_node_id(inode) == FUSE_ROOT_ID) goto out_iput; newent = d_materialise_unique(entry, inode); err = PTR_ERR(newent); if (IS_ERR(newent)) goto out_err; entry = newent ? newent : entry; if (outarg_valid) fuse_change_entry_timeout(entry, &outarg); else fuse_invalidate_entry_cache(entry); fuse_advise_use_readdirplus(dir); return newent; out_iput: iput(inode); out_err: return ERR_PTR(err);} /* * Atomic create+open operation * * If the filesystem doesn't support this, then fall back to separate * 'mknod' + 'open' requests. */static int fuse_create_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned flags, umode_t mode, int *opened){ int err; struct inode *inode; struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req; struct fuse_forget_link *forget; struct fuse_create_in inarg; struct fuse_open_out outopen; struct fuse_entry_out outentry; struct fuse_file *ff; /* Userspace expects S_IFREG in create mode */ BUG_ON((mode & S_IFMT) != S_IFREG); forget = fuse_alloc_forget(); err = -ENOMEM; if (!forget) goto out_err; req = fuse_get_req_nopages(fc); err = PTR_ERR(req); if (IS_ERR(req)) goto out_put_forget_req; err = -ENOMEM; ff = fuse_file_alloc(fc); if (!ff) goto out_put_request; if (!fc->dont_mask) mode &= ~current_umask(); flags &= ~O_NOCTTY; memset(&inarg, 0, sizeof(inarg)); memset(&outentry, 0, sizeof(outentry)); inarg.flags = flags; inarg.mode = mode; inarg.umask = current_umask(); req->in.h.opcode = FUSE_CREATE; req->in.h.nodeid = get_node_id(dir); req->in.numargs = 2; req->in.args[0].size = fc->minor < 12 ? sizeof(struct fuse_open_in) : sizeof(inarg); req->in.args[0].value = &inarg; req->in.args[1].size = entry->d_name.len + 1; req->in.args[1].value = entry->d_name.name; req->out.numargs = 2; if (fc->minor < 9) req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; else req->out.args[0].size = sizeof(outentry); req->out.args[0].value = &outentry; req->out.args[1].size = sizeof(outopen); req->out.args[1].value = &outopen; fuse_request_send(fc, req); err = req->out.h.error; if (err) goto out_free_ff; err = -EIO; if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) goto out_free_ff; fuse_put_request(fc, req); ff->fh = outopen.fh; ff->nodeid = outentry.nodeid; ff->open_flags = outopen.open_flags; inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, &outentry.attr, entry_attr_timeout(&outentry), 0); if (!inode) { flags &= ~(O_CREAT | O_EXCL | O_TRUNC); fuse_sync_release(ff, flags); fuse_queue_forget(fc, forget, outentry.nodeid, 1); err = -ENOMEM; goto out_err; } kfree(forget); d_instantiate(entry, inode); fuse_change_entry_timeout(entry, &outentry); fuse_invalidate_attr(dir); err = finish_open(file, entry, generic_file_open, opened); if (err) { fuse_sync_release(ff, flags); } else { file->private_data = fuse_file_get(ff); fuse_finish_open(inode, file); } return err; out_free_ff: fuse_file_free(ff);out_put_request: fuse_put_request(fc, req);out_put_forget_req: kfree(forget);out_err: return err;} static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);static int fuse_atomic_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned flags, umode_t mode, int *opened){ int err;Lines 1–500 of 1935. 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/* FUSE: Filesystem in Userspace Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu> This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include "fuse_i.h" #include <linux/pagemap.h> #include <linux/file.h> #include <linux/sched.h> #include <linux/namei.h> #include <linux/slab.h> static bool fuse_use_readdirplus(struct inode *dir, struct dir_context *ctx) { struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_inode *fi = get_fuse_inode(dir); if (!fc->do_readdirplus) return false; if (!fc->readdirplus_auto) return true; if (test_and_clear_bit(FUSE_I_ADVISE_RDPLUS, &fi->state)) return true; if (ctx->pos == 0) return true; return false; } static void fuse_advise_use_readdirplus(struct inode *dir) { struct fuse_inode *fi = get_fuse_inode(dir); set_bit(FUSE_I_ADVISE_RDPLUS, &fi->state); } #if BITS_PER_LONG >= 64 static inline void fuse_dentry_settime(struct dentry *entry, u64 time) { entry->d_time = time; } static inline u64 fuse_dentry_time(struct dentry *entry) { return entry->d_time; } #else /* * On 32 bit archs store the high 32 bits of time in d_fsdata */ static void fuse_dentry_settime(struct dentry *entry, u64 time) { entry->d_time = time; entry->d_fsdata = (void *) (unsigned long) (time >> 32); } static u64 fuse_dentry_time(struct dentry *entry) { return (u64) entry->d_time + ((u64) (unsigned long) entry->d_fsdata << 32); } #endif /* * FUSE caches dentries and attributes with separate timeout. The * time in jiffies until the dentry/attributes are valid is stored in * dentry->d_time and fuse_inode->i_time respectively. */ /* * Calculate the time in jiffies until a dentry/attributes are valid */ static u64 time_to_jiffies(unsigned long sec, unsigned long nsec) { if (sec || nsec) { struct timespec ts = {sec, nsec}; return get_jiffies_64() + timespec_to_jiffies(&ts); } else return 0; } /* * Set dentry and possibly attribute timeouts from the lookup/mk* * replies */ static void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o) { fuse_dentry_settime(entry, time_to_jiffies(o->entry_valid, o->entry_valid_nsec)); } static u64 attr_timeout(struct fuse_attr_out *o) { return time_to_jiffies(o->attr_valid, o->attr_valid_nsec); } static u64 entry_attr_timeout(struct fuse_entry_out *o) { return time_to_jiffies(o->attr_valid, o->attr_valid_nsec); } /* * Mark the attributes as stale, so that at the next call to * ->getattr() they will be fetched from userspace */ void fuse_invalidate_attr(struct inode *inode) { get_fuse_inode(inode)->i_time = 0; } /* * Just mark the entry as stale, so that a next attempt to look it up * will result in a new lookup call to userspace * * This is called when a dentry is about to become negative and the * timeout is unknown (unlink, rmdir, rename and in some cases * lookup) */ void fuse_invalidate_entry_cache(struct dentry *entry) { fuse_dentry_settime(entry, 0); } /* * Same as fuse_invalidate_entry_cache(), but also try to remove the * dentry from the hash */ static void fuse_invalidate_entry(struct dentry *entry) { d_invalidate(entry); fuse_invalidate_entry_cache(entry); } static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_req *req, u64 nodeid, struct qstr *name, struct fuse_entry_out *outarg) { memset(outarg, 0, sizeof(struct fuse_entry_out)); req->in.h.opcode = FUSE_LOOKUP; req->in.h.nodeid = nodeid; req->in.numargs = 1; req->in.args[0].size = name->len + 1; req->in.args[0].value = name->name; req->out.numargs = 1; if (fc->minor < 9) req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; else req->out.args[0].size = sizeof(struct fuse_entry_out); req->out.args[0].value = outarg; } u64 fuse_get_attr_version(struct fuse_conn *fc) { u64 curr_version; /* * The spin lock isn't actually needed on 64bit archs, but we * don't yet care too much about such optimizations. */ spin_lock(&fc->lock); curr_version = fc->attr_version; spin_unlock(&fc->lock); return curr_version; } /* * Check whether the dentry is still valid * * If the entry validity timeout has expired and the dentry is * positive, try to redo the lookup. If the lookup results in a * different inode, then let the VFS invalidate the dentry and redo * the lookup once more. If the lookup results in the same inode, * then refresh the attributes, timeouts and mark the dentry valid. */ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) { struct inode *inode; struct dentry *parent; struct fuse_conn *fc; struct fuse_inode *fi; int ret; inode = ACCESS_ONCE(entry->d_inode); if (inode && is_bad_inode(inode)) goto invalid; else if (fuse_dentry_time(entry) < get_jiffies_64()) { int err; struct fuse_entry_out outarg; struct fuse_req *req; struct fuse_forget_link *forget; u64 attr_version; /* For negative dentries, always do a fresh lookup */ if (!inode) goto invalid; ret = -ECHILD; if (flags & LOOKUP_RCU) goto out; fc = get_fuse_conn(inode); req = fuse_get_req_nopages(fc); ret = PTR_ERR(req); if (IS_ERR(req)) goto out; forget = fuse_alloc_forget(); if (!forget) { fuse_put_request(fc, req); ret = -ENOMEM; goto out; } attr_version = fuse_get_attr_version(fc); parent = dget_parent(entry); fuse_lookup_init(fc, req, get_node_id(parent->d_inode), &entry->d_name, &outarg); fuse_request_send(fc, req); dput(parent); err = req->out.h.error; fuse_put_request(fc, req); /* Zero nodeid is same as -ENOENT */ if (!err && !outarg.nodeid) err = -ENOENT; if (!err) { fi = get_fuse_inode(inode); if (outarg.nodeid != get_node_id(inode)) { fuse_queue_forget(fc, forget, outarg.nodeid, 1); goto invalid; } spin_lock(&fc->lock); fi->nlookup++; spin_unlock(&fc->lock); } kfree(forget); if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) goto invalid; fuse_change_attributes(inode, &outarg.attr, entry_attr_timeout(&outarg), attr_version); fuse_change_entry_timeout(entry, &outarg); } else if (inode) { fi = get_fuse_inode(inode); if (flags & LOOKUP_RCU) { if (test_bit(FUSE_I_INIT_RDPLUS, &fi->state)) return -ECHILD; } else if (test_and_clear_bit(FUSE_I_INIT_RDPLUS, &fi->state)) { parent = dget_parent(entry); fuse_advise_use_readdirplus(parent->d_inode); dput(parent); } } ret = 1; out: return ret; invalid: ret = 0; if (!(flags & LOOKUP_RCU) && check_submounts_and_drop(entry) != 0) ret = 1; goto out; } static int invalid_nodeid(u64 nodeid) { return !nodeid || nodeid == FUSE_ROOT_ID; } const struct dentry_operations fuse_dentry_operations = { .d_revalidate = fuse_dentry_revalidate, }; int fuse_valid_type(int m) { return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) || S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m); } int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, struct fuse_entry_out *outarg, struct inode **inode) { struct fuse_conn *fc = get_fuse_conn_super(sb); struct fuse_req *req; struct fuse_forget_link *forget; u64 attr_version; int err; *inode = NULL; err = -ENAMETOOLONG; if (name->len > FUSE_NAME_MAX) goto out; req = fuse_get_req_nopages(fc); err = PTR_ERR(req); if (IS_ERR(req)) goto out; forget = fuse_alloc_forget(); err = -ENOMEM; if (!forget) { fuse_put_request(fc, req); goto out; } attr_version = fuse_get_attr_version(fc); fuse_lookup_init(fc, req, nodeid, name, outarg); fuse_request_send(fc, req); err = req->out.h.error; fuse_put_request(fc, req); /* Zero nodeid is same as -ENOENT, but with valid timeout */ if (err || !outarg->nodeid) goto out_put_forget; err = -EIO; if (!outarg->nodeid) goto out_put_forget; if (!fuse_valid_type(outarg->attr.mode)) goto out_put_forget; *inode = fuse_iget(sb, outarg->nodeid, outarg->generation, &outarg->attr, entry_attr_timeout(outarg), attr_version); err = -ENOMEM; if (!*inode) { fuse_queue_forget(fc, forget, outarg->nodeid, 1); goto out; } err = 0; out_put_forget: kfree(forget); out: return err; } static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, unsigned int flags) { int err; struct fuse_entry_out outarg; struct inode *inode; struct dentry *newent; bool outarg_valid = true; err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, &outarg, &inode); if (err == -ENOENT) { outarg_valid = false; err = 0; } if (err) goto out_err; err = -EIO; if (inode && get_node_id(inode) == FUSE_ROOT_ID) goto out_iput; newent = d_materialise_unique(entry, inode); err = PTR_ERR(newent); if (IS_ERR(newent)) goto out_err; entry = newent ? newent : entry; if (outarg_valid) fuse_change_entry_timeout(entry, &outarg); else fuse_invalidate_entry_cache(entry); fuse_advise_use_readdirplus(dir); return newent; out_iput: iput(inode); out_err: return ERR_PTR(err); } /* * Atomic create+open operation * * If the filesystem doesn't support this, then fall back to separate * 'mknod' + 'open' requests. */ static int fuse_create_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned flags, umode_t mode, int *opened) { int err; struct inode *inode; struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req; struct fuse_forget_link *forget; struct fuse_create_in inarg; struct fuse_open_out outopen; struct fuse_entry_out outentry; struct fuse_file *ff; /* Userspace expects S_IFREG in create mode */ BUG_ON((mode & S_IFMT) != S_IFREG); forget = fuse_alloc_forget(); err = -ENOMEM; if (!forget) goto out_err; req = fuse_get_req_nopages(fc); err = PTR_ERR(req); if (IS_ERR(req)) goto out_put_forget_req; err = -ENOMEM; ff = fuse_file_alloc(fc); if (!ff) goto out_put_request; if (!fc->dont_mask) mode &= ~current_umask(); flags &= ~O_NOCTTY; memset(&inarg, 0, sizeof(inarg)); memset(&outentry, 0, sizeof(outentry)); inarg.flags = flags; inarg.mode = mode; inarg.umask = current_umask(); req->in.h.opcode = FUSE_CREATE; req->in.h.nodeid = get_node_id(dir); req->in.numargs = 2; req->in.args[0].size = fc->minor < 12 ? sizeof(struct fuse_open_in) : sizeof(inarg); req->in.args[0].value = &inarg; req->in.args[1].size = entry->d_name.len + 1; req->in.args[1].value = entry->d_name.name; req->out.numargs = 2; if (fc->minor < 9) req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; else req->out.args[0].size = sizeof(outentry); req->out.args[0].value = &outentry; req->out.args[1].size = sizeof(outopen); req->out.args[1].value = &outopen; fuse_request_send(fc, req); err = req->out.h.error; if (err) goto out_free_ff; err = -EIO; if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) goto out_free_ff; fuse_put_request(fc, req); ff->fh = outopen.fh; ff->nodeid = outentry.nodeid; ff->open_flags = outopen.open_flags; inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, &outentry.attr, entry_attr_timeout(&outentry), 0); if (!inode) { flags &= ~(O_CREAT | O_EXCL | O_TRUNC); fuse_sync_release(ff, flags); fuse_queue_forget(fc, forget, outentry.nodeid, 1); err = -ENOMEM; goto out_err; } kfree(forget); d_instantiate(entry, inode); fuse_change_entry_timeout(entry, &outentry); fuse_invalidate_attr(dir); err = finish_open(file, entry, generic_file_open, opened); if (err) { fuse_sync_release(ff, flags); } else { file->private_data = fuse_file_get(ff); fuse_finish_open(inode, file); } return err; out_free_ff: fuse_file_free(ff); out_put_request: fuse_put_request(fc, req); out_put_forget_req: kfree(forget); out_err: return err; } static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t); static int fuse_atomic_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned flags, umode_t mode, int *opened) { int err;