From 0018d8bfc4f41de27e45517380e7d90be3580b44 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 14 Mar 2014 12:09:36 -0400 Subject: get_write_access() is inlined, exporting it is pointless Signed-off-by: Al Viro --- fs/namei.c | 1 - 1 file changed, 1 deletion(-) (limited to 'fs/namei.c') diff --git a/fs/namei.c b/fs/namei.c index 4b491b431990..2fb4fe57f4b1 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4413,7 +4413,6 @@ EXPORT_SYMBOL(user_path_at); EXPORT_SYMBOL(follow_down_one); EXPORT_SYMBOL(follow_down); EXPORT_SYMBOL(follow_up); -EXPORT_SYMBOL(get_write_access); /* nfsd */ EXPORT_SYMBOL(lock_rename); EXPORT_SYMBOL(lookup_one_len); EXPORT_SYMBOL(page_follow_link_light); -- cgit v1.2.3 From 4d359507346a156491300cc193252b525892ae91 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 14 Mar 2014 12:20:17 -0400 Subject: namei.c: move EXPORT_SYMBOL to corresponding definitions Signed-off-by: Al Viro --- fs/namei.c | 55 +++++++++++++++++++++++++++---------------------------- 1 file changed, 27 insertions(+), 28 deletions(-) (limited to 'fs/namei.c') diff --git a/fs/namei.c b/fs/namei.c index 2fb4fe57f4b1..617de9e9967b 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -358,6 +358,7 @@ int generic_permission(struct inode *inode, int mask) return -EACCES; } +EXPORT_SYMBOL(generic_permission); /* * We _really_ want to just do "generic_permission()" without @@ -455,6 +456,7 @@ int inode_permission(struct inode *inode, int mask) return retval; return __inode_permission(inode, mask); } +EXPORT_SYMBOL(inode_permission); /** * path_get - get a reference to a path @@ -924,6 +926,7 @@ int follow_up(struct path *path) path->mnt = &parent->mnt; return 1; } +EXPORT_SYMBOL(follow_up); /* * Perform an automount @@ -1085,6 +1088,7 @@ int follow_down_one(struct path *path) } return 0; } +EXPORT_SYMBOL(follow_down_one); static inline bool managed_dentry_might_block(struct dentry *dentry) { @@ -1223,6 +1227,7 @@ int follow_down(struct path *path) } return 0; } +EXPORT_SYMBOL(follow_down); /* * Skip to top of mountpoint pile in refwalk mode for follow_dotdot() @@ -2025,6 +2030,7 @@ int kern_path(const char *name, unsigned int flags, struct path *path) *path = nd.path; return res; } +EXPORT_SYMBOL(kern_path); /** * vfs_path_lookup - lookup a file path relative to a dentry-vfsmount pair @@ -2049,6 +2055,7 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt, *path = nd.path; return err; } +EXPORT_SYMBOL(vfs_path_lookup); /* * Restricted form of lookup. Doesn't follow links, single-component only, @@ -2111,6 +2118,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len) return __lookup_hash(&this, base, 0); } +EXPORT_SYMBOL(lookup_one_len); int user_path_at_empty(int dfd, const char __user *name, unsigned flags, struct path *path, int *empty) @@ -2135,6 +2143,7 @@ int user_path_at(int dfd, const char __user *name, unsigned flags, { return user_path_at_empty(dfd, name, flags, path, NULL); } +EXPORT_SYMBOL(user_path_at); /* * NB: most callers don't do anything directly with the reference to the @@ -2477,6 +2486,7 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2) mutex_lock_nested(&p2->d_inode->i_mutex, I_MUTEX_CHILD); return NULL; } +EXPORT_SYMBOL(lock_rename); void unlock_rename(struct dentry *p1, struct dentry *p2) { @@ -2486,6 +2496,7 @@ void unlock_rename(struct dentry *p1, struct dentry *p2) mutex_unlock(&p1->d_inode->i_sb->s_vfs_rename_mutex); } } +EXPORT_SYMBOL(unlock_rename); int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool want_excl) @@ -2506,6 +2517,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, fsnotify_create(dir, dentry); return error; } +EXPORT_SYMBOL(vfs_create); static int may_open(struct path *path, int acc_mode, int flag) { @@ -3376,6 +3388,7 @@ int vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) fsnotify_create(dir, dentry); return error; } +EXPORT_SYMBOL(vfs_mknod); static int may_mknod(umode_t mode) { @@ -3465,6 +3478,7 @@ int vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) fsnotify_mkdir(dir, dentry); return error; } +EXPORT_SYMBOL(vfs_mkdir); SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode) { @@ -3519,6 +3533,7 @@ void dentry_unhash(struct dentry *dentry) __d_drop(dentry); spin_unlock(&dentry->d_lock); } +EXPORT_SYMBOL(dentry_unhash); int vfs_rmdir(struct inode *dir, struct dentry *dentry) { @@ -3556,6 +3571,7 @@ out: d_delete(dentry); return error; } +EXPORT_SYMBOL(vfs_rmdir); static long do_rmdir(int dfd, const char __user *pathname) { @@ -3673,6 +3689,7 @@ out: return error; } +EXPORT_SYMBOL(vfs_unlink); /* * Make sure that the actual truncation of the file will occur outside its @@ -3786,6 +3803,7 @@ int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname) fsnotify_create(dir, dentry); return error; } +EXPORT_SYMBOL(vfs_symlink); SYSCALL_DEFINE3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname) @@ -3894,6 +3912,7 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de fsnotify_link(dir, inode, new_dentry); return error; } +EXPORT_SYMBOL(vfs_link); /* * Hardlinks are often used in delicate situations. We avoid @@ -4156,6 +4175,7 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry, return error; } +EXPORT_SYMBOL(vfs_rename); SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname) @@ -4293,6 +4313,7 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen, const c out: return len; } +EXPORT_SYMBOL(vfs_readlink); /* * A helper for ->readlink(). This should be used *ONLY* for symlinks that @@ -4315,6 +4336,7 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) dentry->d_inode->i_op->put_link(dentry, &nd, cookie); return res; } +EXPORT_SYMBOL(generic_readlink); /* get the link contents into pagecache */ static char *page_getlink(struct dentry * dentry, struct page **ppage) @@ -4342,6 +4364,7 @@ int page_readlink(struct dentry *dentry, char __user *buffer, int buflen) } return res; } +EXPORT_SYMBOL(page_readlink); void *page_follow_link_light(struct dentry *dentry, struct nameidata *nd) { @@ -4349,6 +4372,7 @@ void *page_follow_link_light(struct dentry *dentry, struct nameidata *nd) nd_set_link(nd, page_getlink(dentry, &page)); return page; } +EXPORT_SYMBOL(page_follow_link_light); void page_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) { @@ -4359,6 +4383,7 @@ void page_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie) page_cache_release(page); } } +EXPORT_SYMBOL(page_put_link); /* * The nofs argument instructs pagecache_write_begin to pass AOP_FLAG_NOFS @@ -4396,44 +4421,18 @@ retry: fail: return err; } +EXPORT_SYMBOL(__page_symlink); int page_symlink(struct inode *inode, const char *symname, int len) { return __page_symlink(inode, symname, len, !(mapping_gfp_mask(inode->i_mapping) & __GFP_FS)); } +EXPORT_SYMBOL(page_symlink); const struct inode_operations page_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, }; - -EXPORT_SYMBOL(user_path_at); -EXPORT_SYMBOL(follow_down_one); -EXPORT_SYMBOL(follow_down); -EXPORT_SYMBOL(follow_up); -EXPORT_SYMBOL(lock_rename); -EXPORT_SYMBOL(lookup_one_len); -EXPORT_SYMBOL(page_follow_link_light); -EXPORT_SYMBOL(page_put_link); -EXPORT_SYMBOL(page_readlink); -EXPORT_SYMBOL(__page_symlink); -EXPORT_SYMBOL(page_symlink); EXPORT_SYMBOL(page_symlink_inode_operations); -EXPORT_SYMBOL(kern_path); -EXPORT_SYMBOL(vfs_path_lookup); -EXPORT_SYMBOL(inode_permission); -EXPORT_SYMBOL(unlock_rename); -EXPORT_SYMBOL(vfs_create); -EXPORT_SYMBOL(vfs_link); -EXPORT_SYMBOL(vfs_mkdir); -EXPORT_SYMBOL(vfs_mknod); -EXPORT_SYMBOL(generic_permission); -EXPORT_SYMBOL(vfs_readlink); -EXPORT_SYMBOL(vfs_rename); -EXPORT_SYMBOL(vfs_rmdir); -EXPORT_SYMBOL(vfs_symlink); -EXPORT_SYMBOL(vfs_unlink); -EXPORT_SYMBOL(dentry_unhash); -EXPORT_SYMBOL(generic_readlink); -- cgit v1.2.3 From 5d826c847b34de6415b4f1becd88a57ff619af50 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 14 Mar 2014 13:42:45 -0400 Subject: new helper: readlink_copy() Signed-off-by: Al Viro --- fs/namei.c | 13 +++++-------- fs/proc/namespaces.c | 14 ++++---------- fs/proc/self.c | 2 +- fs/xfs/xfs_ioctl.c | 28 +--------------------------- include/linux/fs.h | 2 +- 5 files changed, 12 insertions(+), 47 deletions(-) (limited to 'fs/namei.c') diff --git a/fs/namei.c b/fs/namei.c index 617de9e9967b..4fb52f0ca5cb 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4297,11 +4297,9 @@ SYSCALL_DEFINE2(rename, const char __user *, oldname, const char __user *, newna return sys_renameat(AT_FDCWD, oldname, AT_FDCWD, newname); } -int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen, const char *link) +int readlink_copy(char __user *buffer, int buflen, const char *link) { - int len; - - len = PTR_ERR(link); + int len = PTR_ERR(link); if (IS_ERR(link)) goto out; @@ -4313,7 +4311,7 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen, const c out: return len; } -EXPORT_SYMBOL(vfs_readlink); +EXPORT_SYMBOL(readlink_copy); /* * A helper for ->readlink(). This should be used *ONLY* for symlinks that @@ -4331,7 +4329,7 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) if (IS_ERR(cookie)) return PTR_ERR(cookie); - res = vfs_readlink(dentry, buffer, buflen, nd_get_link(&nd)); + res = readlink_copy(buffer, buflen, nd_get_link(&nd)); if (dentry->d_inode->i_op->put_link) dentry->d_inode->i_op->put_link(dentry, &nd, cookie); return res; @@ -4356,8 +4354,7 @@ static char *page_getlink(struct dentry * dentry, struct page **ppage) int page_readlink(struct dentry *dentry, char __user *buffer, int buflen) { struct page *page = NULL; - char *s = page_getlink(dentry, &page); - int res = vfs_readlink(dentry,buffer,buflen,s); + int res = readlink_copy(buffer, buflen, page_getlink(dentry, &page)); if (page) { kunmap(page); page_cache_release(page); diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 9ae46b87470d..89026095f2b5 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -146,7 +146,7 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl struct task_struct *task; void *ns; char name[50]; - int len = -EACCES; + int res = -EACCES; task = get_proc_task(inode); if (!task) @@ -155,24 +155,18 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl if (!ptrace_may_access(task, PTRACE_MODE_READ)) goto out_put_task; - len = -ENOENT; + res = -ENOENT; ns = ns_ops->get(task); if (!ns) goto out_put_task; snprintf(name, sizeof(name), "%s:[%u]", ns_ops->name, ns_ops->inum(ns)); - len = strlen(name); - - if (len > buflen) - len = buflen; - if (copy_to_user(buffer, name, len)) - len = -EFAULT; - + res = readlink_copy(buffer, buflen, name); ns_ops->put(ns); out_put_task: put_task_struct(task); out: - return len; + return res; } static const struct inode_operations proc_ns_link_inode_operations = { diff --git a/fs/proc/self.c b/fs/proc/self.c index ffeb202ec942..4348bb8907c2 100644 --- a/fs/proc/self.c +++ b/fs/proc/self.c @@ -16,7 +16,7 @@ static int proc_self_readlink(struct dentry *dentry, char __user *buffer, if (!tgid) return -ENOENT; sprintf(tmp, "%d", tgid); - return vfs_readlink(dentry,buffer,buflen,tmp); + return readlink_copy(buffer, buflen, tmp); } static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index bcfe61202115..0b18776b075e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -271,32 +271,6 @@ xfs_open_by_handle( return error; } -/* - * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's - * unused first argument. - */ -STATIC int -do_readlink( - char __user *buffer, - int buflen, - const char *link) -{ - int len; - - len = PTR_ERR(link); - if (IS_ERR(link)) - goto out; - - len = strlen(link); - if (len > (unsigned) buflen) - len = buflen; - if (copy_to_user(buffer, link, len)) - len = -EFAULT; - out: - return len; -} - - int xfs_readlink_by_handle( struct file *parfilp, @@ -334,7 +308,7 @@ xfs_readlink_by_handle( error = -xfs_readlink(XFS_I(dentry->d_inode), link); if (error) goto out_kfree; - error = do_readlink(hreq->ohandle, olen, link); + error = readlink_copy(hreq->ohandle, olen, link); if (error) goto out_kfree; diff --git a/include/linux/fs.h b/include/linux/fs.h index d9d88a0b456e..db181b542db1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2517,7 +2517,7 @@ extern const struct file_operations generic_ro_fops; #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m)) -extern int vfs_readlink(struct dentry *, char __user *, int, const char *); +extern int readlink_copy(char __user *, int, const char *); extern int page_readlink(struct dentry *, char __user *, int); extern void *page_follow_link_light(struct dentry *, struct nameidata *); extern void page_put_link(struct dentry *, struct nameidata *, void *); -- cgit v1.2.3