From c3b1a350846a11dd1054cb7832e098aa37025deb Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 9 Jun 2012 20:28:22 -0400 Subject: debugfs: make sure that debugfs_create_file() gets used only for regulars It, debugfs_create_dir() and debugfs_create_link() use the common helper now. Signed-off-by: Al Viro --- fs/debugfs/inode.c | 56 +++++++++++++++++++++++++++++++++--------------------- 1 file changed, 34 insertions(+), 22 deletions(-) (limited to 'fs/debugfs/inode.c') diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index b80bc846a15..d423b966bc7 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -335,6 +335,30 @@ static int debugfs_create_by_name(const char *name, umode_t mode, return error; } +struct dentry *__create_file(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops) +{ + struct dentry *dentry = NULL; + int error; + + pr_debug("debugfs: creating file '%s'\n",name); + + error = simple_pin_fs(&debug_fs_type, &debugfs_mount, + &debugfs_mount_count); + if (error) + goto exit; + + error = debugfs_create_by_name(name, mode, parent, &dentry, + data, fops); + if (error) { + dentry = NULL; + simple_release_fs(&debugfs_mount, &debugfs_mount_count); + } +exit: + return dentry; +} + /** * debugfs_create_file - create a file in the debugfs filesystem * @name: a pointer to a string containing the name of the file to create. @@ -365,25 +389,15 @@ struct dentry *debugfs_create_file(const char *name, umode_t mode, struct dentry *parent, void *data, const struct file_operations *fops) { - struct dentry *dentry = NULL; - int error; - - pr_debug("debugfs: creating file '%s'\n",name); - - error = simple_pin_fs(&debug_fs_type, &debugfs_mount, - &debugfs_mount_count); - if (error) - goto exit; - - error = debugfs_create_by_name(name, mode, parent, &dentry, - data, fops); - if (error) { - dentry = NULL; - simple_release_fs(&debugfs_mount, &debugfs_mount_count); - goto exit; + switch (mode & S_IFMT) { + case S_IFREG: + case 0: + break; + default: + BUG(); } -exit: - return dentry; + + return __create_file(name, mode, parent, data, fops); } EXPORT_SYMBOL_GPL(debugfs_create_file); @@ -407,8 +421,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_file); */ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent) { - return debugfs_create_file(name, - S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO, + return __create_file(name, S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO, parent, NULL, NULL); } EXPORT_SYMBOL_GPL(debugfs_create_dir); @@ -446,8 +459,7 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent, if (!link) return NULL; - result = debugfs_create_file(name, S_IFLNK | S_IRWXUGO, parent, link, - NULL); + result = __create_file(name, S_IFLNK | S_IRWXUGO, parent, link, NULL); if (!result) kfree(link); return result; -- cgit v1.2.3-70-g09d2 From cfa57c11b0d5a80f7bffa1ab35bc46892127817f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 9 Jun 2012 20:33:28 -0400 Subject: debugfs: fold debugfs_create_by_name() into the only caller Signed-off-by: Al Viro --- fs/debugfs/inode.c | 53 ++++++++++++++++++++--------------------------------- 1 file changed, 20 insertions(+), 33 deletions(-) (limited to 'fs/debugfs/inode.c') diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index d423b966bc7..79f53f3ce7c 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -293,13 +293,19 @@ static struct file_system_type debug_fs_type = { .kill_sb = kill_litter_super, }; -static int debugfs_create_by_name(const char *name, umode_t mode, - struct dentry *parent, - struct dentry **dentry, - void *data, - const struct file_operations *fops) +struct dentry *__create_file(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops) { - int error = 0; + struct dentry *dentry = NULL; + int error; + + pr_debug("debugfs: creating file '%s'\n",name); + + error = simple_pin_fs(&debug_fs_type, &debugfs_mount, + &debugfs_mount_count); + if (error) + goto exit; /* If the parent is not specified, we create it in the root. * We need the root dentry to do this, which is in the super @@ -309,48 +315,29 @@ static int debugfs_create_by_name(const char *name, umode_t mode, if (!parent) parent = debugfs_mount->mnt_root; - *dentry = NULL; + dentry = NULL; mutex_lock(&parent->d_inode->i_mutex); - *dentry = lookup_one_len(name, parent, strlen(name)); - if (!IS_ERR(*dentry)) { + dentry = lookup_one_len(name, parent, strlen(name)); + if (!IS_ERR(dentry)) { switch (mode & S_IFMT) { case S_IFDIR: - error = debugfs_mkdir(parent->d_inode, *dentry, mode, + error = debugfs_mkdir(parent->d_inode, dentry, mode, data, fops); break; case S_IFLNK: - error = debugfs_link(parent->d_inode, *dentry, mode, + error = debugfs_link(parent->d_inode, dentry, mode, data, fops); break; default: - error = debugfs_create(parent->d_inode, *dentry, mode, + error = debugfs_create(parent->d_inode, dentry, mode, data, fops); break; } - dput(*dentry); + dput(dentry); } else - error = PTR_ERR(*dentry); + error = PTR_ERR(dentry); mutex_unlock(&parent->d_inode->i_mutex); - return error; -} - -struct dentry *__create_file(const char *name, umode_t mode, - struct dentry *parent, void *data, - const struct file_operations *fops) -{ - struct dentry *dentry = NULL; - int error; - - pr_debug("debugfs: creating file '%s'\n",name); - - error = simple_pin_fs(&debug_fs_type, &debugfs_mount, - &debugfs_mount_count); - if (error) - goto exit; - - error = debugfs_create_by_name(name, mode, parent, &dentry, - data, fops); if (error) { dentry = NULL; simple_release_fs(&debugfs_mount, &debugfs_mount_count); -- cgit v1.2.3-70-g09d2 From ac481d6ca4081bdd348cbd84963d1ece843a3407 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 9 Jun 2012 20:40:20 -0400 Subject: debugfs: get rid of useless arguments to debugfs_{mkdir,symlink} Signed-off-by: Al Viro --- fs/debugfs/inode.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) (limited to 'fs/debugfs/inode.c') diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 79f53f3ce7c..d17c20fd74e 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -54,13 +54,12 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev break; case S_IFLNK: inode->i_op = &debugfs_link_operations; - inode->i_fop = fops; inode->i_private = data; break; case S_IFDIR: inode->i_op = &simple_dir_inode_operations; - inode->i_fop = fops ? fops : &simple_dir_operations; - inode->i_private = data; + inode->i_fop = &simple_dir_operations; + inode->i_private = NULL; /* directory inodes start off with i_nlink == 2 * (for "." entry) */ @@ -91,13 +90,12 @@ static int debugfs_mknod(struct inode *dir, struct dentry *dentry, return error; } -static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, - void *data, const struct file_operations *fops) +static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { int res; mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR; - res = debugfs_mknod(dir, dentry, mode, 0, data, fops); + res = debugfs_mknod(dir, dentry, mode, 0, NULL, NULL); if (!res) { inc_nlink(dir); fsnotify_mkdir(dir, dentry); @@ -106,10 +104,10 @@ static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, } static int debugfs_link(struct inode *dir, struct dentry *dentry, umode_t mode, - void *data, const struct file_operations *fops) + void *data) { mode = (mode & S_IALLUGO) | S_IFLNK; - return debugfs_mknod(dir, dentry, mode, 0, data, fops); + return debugfs_mknod(dir, dentry, mode, 0, data, NULL); } static int debugfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, @@ -321,12 +319,12 @@ struct dentry *__create_file(const char *name, umode_t mode, if (!IS_ERR(dentry)) { switch (mode & S_IFMT) { case S_IFDIR: - error = debugfs_mkdir(parent->d_inode, dentry, mode, - data, fops); + error = debugfs_mkdir(parent->d_inode, dentry, mode); + break; case S_IFLNK: error = debugfs_link(parent->d_inode, dentry, mode, - data, fops); + data); break; default: error = debugfs_create(parent->d_inode, dentry, mode, -- cgit v1.2.3-70-g09d2