diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/coda/psdev.c | 5 | ||||
| -rw-r--r-- | fs/debugfs/inode.c | 114 | ||||
| -rw-r--r-- | fs/partitions/check.c | 2 | ||||
| -rw-r--r-- | fs/sysfs/dir.c | 37 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 5 | ||||
| -rw-r--r-- | fs/sysfs/symlink.c | 41 | ||||
| -rw-r--r-- | fs/sysfs/sysfs.h | 1 |
7 files changed, 173 insertions, 32 deletions
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c index e3eb355..40c36f7 100644 --- a/fs/coda/psdev.c +++ b/fs/coda/psdev.c @@ -362,8 +362,9 @@ static int init_coda_psdev(void) goto out_chrdev; } for (i = 0; i < MAX_CODADEVS; i++) - device_create(coda_psdev_class, NULL, - MKDEV(CODA_PSDEV_MAJOR,i), "cfs%d", i); + device_create_drvdata(coda_psdev_class, NULL, + MKDEV(CODA_PSDEV_MAJOR, i), + NULL, "cfs%d", i); coda_sysctl_init(); goto out; diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index e9602d8..08e28c9 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -309,6 +309,31 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent, } EXPORT_SYMBOL_GPL(debugfs_create_symlink); +static void __debugfs_remove(struct dentry *dentry, struct dentry *parent) +{ + int ret = 0; + + if (debugfs_positive(dentry)) { + if (dentry->d_inode) { + dget(dentry); + switch (dentry->d_inode->i_mode & S_IFMT) { + case S_IFDIR: + ret = simple_rmdir(parent->d_inode, dentry); + break; + case S_IFLNK: + kfree(dentry->d_inode->i_private); + /* fall through */ + default: + simple_unlink(parent->d_inode, dentry); + break; + } + if (!ret) + d_delete(dentry); + dput(dentry); + } + } +} + /** * debugfs_remove - removes a file or directory from the debugfs filesystem * @dentry: a pointer to a the dentry of the file or directory to be @@ -325,7 +350,6 @@ EXPORT_SYMBOL_GPL(debugfs_create_symlink); void debugfs_remove(struct dentry *dentry) { struct dentry *parent; - int ret = 0; if (!dentry) return; @@ -335,29 +359,83 @@ void debugfs_remove(struct dentry *dentry) return; mutex_lock(&parent->d_inode->i_mutex); - if (debugfs_positive(dentry)) { - if (dentry->d_inode) { - dget(dentry); - switch (dentry->d_inode->i_mode & S_IFMT) { - case S_IFDIR: - ret = simple_rmdir(parent->d_inode, dentry); - break; - case S_IFLNK: - kfree(dentry->d_inode->i_private); - /* fall through */ - default: - simple_unlink(parent->d_inode, dentry); + __debugfs_remove(dentry, parent); + mutex_unlock(&parent->d_inode->i_mutex); + simple_release_fs(&debugfs_mount, &debugfs_mount_count); +} +EXPORT_SYMBOL_GPL(debugfs_remove); + +/** + * debugfs_remove_recursive - recursively removes a directory + * @dentry: a pointer to a the dentry of the directory to be removed. + * + * This function recursively removes a directory tree in debugfs that + * was previously created with a call to another debugfs function + * (like debugfs_create_file() or variants thereof.) + * + * This function is required to be called in order for the file to be + * removed, no automatic cleanup of files will happen when a module is + * removed, you are responsible here. + */ +void debugfs_remove_recursive(struct dentry *dentry) +{ + struct dentry *child; + struct dentry *parent; + + if (!dentry) + return; + + parent = dentry->d_parent; + if (!parent || !parent->d_inode) + return; + + parent = dentry; + mutex_lock(&parent->d_inode->i_mutex); + + while (1) { + /* + * When all dentries under "parent" has been removed, + * walk up the tree until we reach our starting point. + */ + if (list_empty(&parent->d_subdirs)) { + mutex_unlock(&parent->d_inode->i_mutex); + if (parent == dentry) break; - } - if (!ret) - d_delete(dentry); - dput(dentry); + parent = parent->d_parent; + mutex_lock(&parent->d_inode->i_mutex); + } + child = list_entry(parent->d_subdirs.next, struct dentry, + d_u.d_child); + + /* + * If "child" isn't empty, walk down the tree and + * remove all its descendants first. + */ + if (!list_empty(&child->d_subdirs)) { + mutex_unlock(&parent->d_inode->i_mutex); + parent = child; + mutex_lock(&parent->d_inode->i_mutex); + continue; } + __debugfs_remove(child, parent); + if (parent->d_subdirs.next == &child->d_u.d_child) { + /* + * Avoid infinite loop if we fail to remove + * one dentry. + */ + mutex_unlock(&parent->d_inode->i_mutex); + break; + } + simple_release_fs(&debugfs_mount, &debugfs_mount_count); } + + parent = dentry->d_parent; + mutex_lock(&parent->d_inode->i_mutex); + __debugfs_remove(dentry, parent); mutex_unlock(&parent->d_inode->i_mutex); simple_release_fs(&debugfs_mount, &debugfs_mount_count); } -EXPORT_SYMBOL_GPL(debugfs_remove); +EXPORT_SYMBOL_GPL(debugfs_remove_recursive); /** * debugfs_rename - rename a file/directory in the debugfs filesystem diff --git a/fs/partitions/check.c b/fs/partitions/check.c index 6149e4b..efef715 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -401,7 +401,7 @@ void register_disk(struct gendisk *disk) disk->dev.parent = disk->driverfs_dev; disk->dev.devt = MKDEV(disk->major, disk->first_minor); - strlcpy(disk->dev.bus_id, disk->disk_name, KOBJ_NAME_LEN); + strlcpy(disk->dev.bus_id, disk->disk_name, BUS_ID_SIZE); /* ewww... some of these buggers have / in the name... */ s = strchr(disk->dev.bus_id, '/'); if (s) diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 8c0e4b9..c1a7efb 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -398,7 +398,7 @@ void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, } /** - * sysfs_add_one - add sysfs_dirent to parent + * __sysfs_add_one - add sysfs_dirent to parent without warning * @acxt: addrm context to use * @sd: sysfs_dirent to be added * @@ -417,7 +417,7 @@ void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, * 0 on success, -EEXIST if entry with the given name already * exists. */ -int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) +int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) { if (sysfs_find_dirent(acxt->parent_sd, sd->s_name)) return -EEXIST; @@ -435,6 +435,39 @@ int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) } /** + * sysfs_add_one - add sysfs_dirent to parent + * @acxt: addrm context to use + * @sd: sysfs_dirent to be added + * + * Get @acxt->parent_sd and set sd->s_parent to it and increment + * nlink of parent inode if @sd is a directory and link into the + * children list of the parent. + * + * This function should be called between calls to + * sysfs_addrm_start() and sysfs_addrm_finish() and should be + * passed the same @acxt as passed to sysfs_addrm_start(). + * + * LOCKING: + * Determined by sysfs_addrm_start(). + * + * RETURNS: + * 0 on success, -EEXIST if entry with the given name already + * exists. + */ +int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) +{ + int ret; + + ret = __sysfs_add_one(acxt, sd); + if (ret == -EEXIST) { + printk(KERN_WARNING "sysfs: duplicate filename '%s' " + "can not be created\n", sd->s_name); + WARN_ON(1); + } + return ret; +} + +/** * sysfs_remove_one - remove sysfs_dirent from parent * @acxt: addrm context to use * @sd: sysfs_dirent to be removed diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index e7735f6..3f07893 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -14,6 +14,7 @@ #include <linux/kobject.h> #include <linux/kallsyms.h> #include <linux/slab.h> +#include <linux/fsnotify.h> #include <linux/namei.h> #include <linux/poll.h> #include <linux/list.h> @@ -585,9 +586,11 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO); newattrs.ia_valid = ATTR_MODE | ATTR_CTIME; - rc = notify_change(victim, &newattrs); + newattrs.ia_ctime = current_fs_time(inode->i_sb); + rc = sysfs_setattr(victim, &newattrs); if (rc == 0) { + fsnotify_change(victim, newattrs.ia_valid); mutex_lock(&sysfs_mutex); victim_sd->s_mode = newattrs.ia_mode; mutex_unlock(&sysfs_mutex); diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index 817f596..a3ba217 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -19,13 +19,8 @@ #include "sysfs.h" -/** - * sysfs_create_link - create symlink between two objects. - * @kobj: object whose directory we're creating the link in. - * @target: object we're pointing to. - * @name: name of the symlink. - */ -int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name) +static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target, + const char *name, int warn) { struct sysfs_dirent *parent_sd = NULL; struct sysfs_dirent *target_sd = NULL; @@ -65,7 +60,10 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char target_sd = NULL; /* reference is now owned by the symlink */ sysfs_addrm_start(&acxt, parent_sd); - error = sysfs_add_one(&acxt, sd); + if (warn) + error = sysfs_add_one(&acxt, sd); + else + error = __sysfs_add_one(&acxt, sd); sysfs_addrm_finish(&acxt); if (error) @@ -80,6 +78,33 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char } /** + * sysfs_create_link - create symlink between two objects. + * @kobj: object whose directory we're creating the link in. + * @target: object we're pointing to. + * @name: name of the symlink. + */ +int sysfs_create_link(struct kobject *kobj, struct kobject *target, + const char *name) +{ + return sysfs_do_create_link(kobj, target, name, 1); +} + +/** + * sysfs_create_link_nowarn - create symlink between two objects. + * @kobj: object whose directory we're creating the link in. + * @target: object we're pointing to. + * @name: name of the symlink. + * + * This function does the same as sysf_create_link(), but it + * doesn't warn if the link already exists. + */ +int sysfs_create_link_nowarn(struct kobject *kobj, struct kobject *target, + const char *name) +{ + return sysfs_do_create_link(kobj, target, name, 0); +} + +/** * sysfs_remove_link - remove symlink in object's directory. * @kobj: object we're acting for. * @name: name of the symlink to remove. diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index ce4e15f8..a5db496 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -107,6 +107,7 @@ struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd); void sysfs_put_active_two(struct sysfs_dirent *sd); void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *parent_sd); +int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd); void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt); |