diff options
Diffstat (limited to 'fs/autofs4')
| -rw-r--r-- | fs/autofs4/autofs_i.h | 55 | ||||
| -rw-r--r-- | fs/autofs4/dev-ioctl.c | 28 | ||||
| -rw-r--r-- | fs/autofs4/expire.c | 60 | ||||
| -rw-r--r-- | fs/autofs4/init.c | 10 | ||||
| -rw-r--r-- | fs/autofs4/inode.c | 25 | ||||
| -rw-r--r-- | fs/autofs4/root.c | 95 | ||||
| -rw-r--r-- | fs/autofs4/symlink.c | 11 | ||||
| -rw-r--r-- | fs/autofs4/waitq.c | 49 |
8 files changed, 175 insertions, 158 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index c37149b929be..e50cfae487b2 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -1,15 +1,11 @@ -/* -*- c -*- ------------------------------------------------------------- * - * - * linux/fs/autofs/autofs_i.h - * - * Copyright 1997-1998 Transmeta Corporation - All Rights Reserved - * Copyright 2005-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation - All Rights Reserved + * Copyright 2005-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ + */ /* Internal header file for autofs */ @@ -35,7 +31,7 @@ #include <linux/mount.h> #include <linux/namei.h> #include <asm/current.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> /* #define DEBUG */ @@ -51,12 +47,14 @@ printk(KERN_ERR "pid %d: %s: " fmt "\n", \ current->pid, __func__, ##__VA_ARGS__) -/* Unified info structure. This is pointed to by both the dentry and - inode structures. Each file in the filesystem has an instance of this - structure. It holds a reference to the dentry, so dentries are never - flushed while the file exists. All name lookups are dealt with at the - dentry level, although the filesystem can interfere in the validation - process. Readdir is implemented by traversing the dentry lists. */ +/* + * Unified info structure. This is pointed to by both the dentry and + * inode structures. Each file in the filesystem has an instance of this + * structure. It holds a reference to the dentry, so dentries are never + * flushed while the file exists. All name lookups are dealt with at the + * dentry level, although the filesystem can interfere in the validation + * process. Readdir is implemented by traversing the dentry lists. + */ struct autofs_info { struct dentry *dentry; struct inode *inode; @@ -78,7 +76,7 @@ struct autofs_info { kgid_t gid; }; -#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */ +#define AUTOFS_INF_EXPIRING (1<<0) /* dentry in the process of expiring */ #define AUTOFS_INF_NO_RCU (1<<1) /* the dentry is being considered * for expiry, so RCU_walk is * not permitted @@ -140,10 +138,11 @@ static inline struct autofs_info *autofs4_dentry_ino(struct dentry *dentry) } /* autofs4_oz_mode(): do we see the man behind the curtain? (The - processes which do manipulations for us in user space sees the raw - filesystem without "magic".) */ - -static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) { + * processes which do manipulations for us in user space sees the raw + * filesystem without "magic".) + */ +static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) +{ return sbi->catatonic || task_pgrp(current) == sbi->oz_pgrp; } @@ -154,12 +153,12 @@ void autofs4_free_ino(struct autofs_info *); int is_autofs4_dentry(struct dentry *); int autofs4_expire_wait(struct dentry *dentry, int rcu_walk); int autofs4_expire_run(struct super_block *, struct vfsmount *, - struct autofs_sb_info *, - struct autofs_packet_expire __user *); + struct autofs_sb_info *, + struct autofs_packet_expire __user *); int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int when); int autofs4_expire_multi(struct super_block *, struct vfsmount *, - struct autofs_sb_info *, int __user *); + struct autofs_sb_info *, int __user *); struct dentry *autofs4_expire_direct(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int how); @@ -224,8 +223,8 @@ static inline int autofs_prepare_pipe(struct file *pipe) /* Queue management functions */ -int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify); -int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int); +int autofs4_wait(struct autofs_sb_info *, struct dentry *, enum autofs_notify); +int autofs4_wait_release(struct autofs_sb_info *, autofs_wqt_t, int); void autofs4_catatonic_mode(struct autofs_sb_info *); static inline u32 autofs4_get_dev(struct autofs_sb_info *sbi) @@ -242,37 +241,37 @@ static inline void __autofs4_add_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { if (list_empty(&ino->expiring)) list_add(&ino->expiring, &sbi->expiring_list); } - return; } static inline void autofs4_add_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { spin_lock(&sbi->lookup_lock); if (list_empty(&ino->expiring)) list_add(&ino->expiring, &sbi->expiring_list); spin_unlock(&sbi->lookup_lock); } - return; } static inline void autofs4_del_expiring(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { spin_lock(&sbi->lookup_lock); if (!list_empty(&ino->expiring)) list_del_init(&ino->expiring); spin_unlock(&sbi->lookup_lock); } - return; } extern void autofs4_kill_sb(struct super_block *); diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c index ac7d921ed984..c64b9fa839c5 100644 --- a/fs/autofs4/dev-ioctl.c +++ b/fs/autofs4/dev-ioctl.c @@ -72,8 +72,8 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param) { int err = 0; - if ((AUTOFS_DEV_IOCTL_VERSION_MAJOR != param->ver_major) || - (AUTOFS_DEV_IOCTL_VERSION_MINOR < param->ver_minor)) { + if ((param->ver_major != AUTOFS_DEV_IOCTL_VERSION_MAJOR) || + (param->ver_minor > AUTOFS_DEV_IOCTL_VERSION_MINOR)) { AUTOFS_WARN("ioctl control interface version mismatch: " "kernel(%u.%u), user(%u.%u), cmd(%d)", AUTOFS_DEV_IOCTL_VERSION_MAJOR, @@ -93,7 +93,8 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param) * Copy parameter control struct, including a possible path allocated * at the end of the struct. */ -static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *in) +static struct autofs_dev_ioctl * + copy_dev_ioctl(struct autofs_dev_ioctl __user *in) { struct autofs_dev_ioctl tmp, *res; @@ -116,7 +117,6 @@ static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *i static inline void free_dev_ioctl(struct autofs_dev_ioctl *param) { kfree(param); - return; } /* @@ -197,7 +197,9 @@ static int find_autofs_mount(const char *pathname, void *data) { struct path path; - int err = kern_path_mountpoint(AT_FDCWD, pathname, &path, 0); + int err; + + err = kern_path_mountpoint(AT_FDCWD, pathname, &path, 0); if (err) return err; err = -ENOENT; @@ -225,6 +227,7 @@ static int test_by_dev(struct path *path, void *p) static int test_by_type(struct path *path, void *p) { struct autofs_info *ino = autofs4_dentry_ino(path->dentry); + return ino && ino->sbi->type & *(unsigned *)p; } @@ -456,8 +459,10 @@ static int autofs_dev_ioctl_requester(struct file *fp, err = 0; autofs4_expire_wait(path.dentry, 0); spin_lock(&sbi->fs_lock); - param->requester.uid = from_kuid_munged(current_user_ns(), ino->uid); - param->requester.gid = from_kgid_munged(current_user_ns(), ino->gid); + param->requester.uid = + from_kuid_munged(current_user_ns(), ino->uid); + param->requester.gid = + from_kgid_munged(current_user_ns(), ino->gid); spin_unlock(&sbi->fs_lock); } path_put(&path); @@ -619,7 +624,8 @@ static ioctl_fn lookup_dev_ioctl(unsigned int cmd) } /* ioctl dispatcher */ -static int _autofs_dev_ioctl(unsigned int command, struct autofs_dev_ioctl __user *user) +static int _autofs_dev_ioctl(unsigned int command, + struct autofs_dev_ioctl __user *user) { struct autofs_dev_ioctl *param; struct file *fp; @@ -711,6 +717,7 @@ out: static long autofs_dev_ioctl(struct file *file, uint command, ulong u) { int err; + err = _autofs_dev_ioctl(command, (struct autofs_dev_ioctl __user *) u); return (long) err; } @@ -733,8 +740,8 @@ static const struct file_operations _dev_ioctl_fops = { static struct miscdevice _autofs_dev_ioctl_misc = { .minor = AUTOFS_MINOR, - .name = AUTOFS_DEVICE_NAME, - .fops = &_dev_ioctl_fops + .name = AUTOFS_DEVICE_NAME, + .fops = &_dev_ioctl_fops }; MODULE_ALIAS_MISCDEV(AUTOFS_MINOR); @@ -757,6 +764,5 @@ int __init autofs_dev_ioctl_init(void) void autofs_dev_ioctl_exit(void) { misc_deregister(&_autofs_dev_ioctl_misc); - return; } diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index 1cebc3c52fa5..8ba37c73b372 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -1,16 +1,12 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/expire.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include "autofs_i.h" @@ -18,7 +14,7 @@ static unsigned long now; /* Check if a dentry can be expired */ static inline int autofs4_can_expire(struct dentry *dentry, - unsigned long timeout, int do_now) + unsigned long timeout, int do_now) { struct autofs_info *ino = autofs4_dentry_ino(dentry); @@ -58,7 +54,9 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry) /* Update the expiry counter if fs is busy */ if (!may_umount_tree(path.mnt)) { - struct autofs_info *ino = autofs4_dentry_ino(top); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(top); ino->last_used = jiffies; goto done; } @@ -74,7 +72,7 @@ done: * Calculate and dget next entry in the subdirs list under root. */ static struct dentry *get_next_positive_subdir(struct dentry *prev, - struct dentry *root) + struct dentry *root) { struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); struct list_head *next; @@ -121,7 +119,7 @@ cont: * Calculate and dget next entry in top down tree traversal. */ static struct dentry *get_next_positive_dentry(struct dentry *prev, - struct dentry *root) + struct dentry *root) { struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); struct list_head *next; @@ -187,15 +185,17 @@ again: * autofs submounts. */ static int autofs4_direct_busy(struct vfsmount *mnt, - struct dentry *top, - unsigned long timeout, - int do_now) + struct dentry *top, + unsigned long timeout, + int do_now) { DPRINTK("top %p %pd", top, top); /* If it's busy update the expiry counters */ if (!may_umount_tree(mnt)) { - struct autofs_info *ino = autofs4_dentry_ino(top); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(top); if (ino) ino->last_used = jiffies; return 1; @@ -208,7 +208,8 @@ static int autofs4_direct_busy(struct vfsmount *mnt, return 0; } -/* Check a directory tree of mount points for busyness +/* + * Check a directory tree of mount points for busyness * The tree is not busy iff no mountpoints are busy */ static int autofs4_tree_busy(struct vfsmount *mnt, @@ -404,6 +405,7 @@ static struct dentry *should_expire(struct dentry *dentry, } else { /* Path walk currently on this dentry? */ struct dentry *expired; + ino_count = atomic_read(&ino->count) + 1; if (d_count(dentry) > ino_count) return NULL; @@ -522,21 +524,22 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk) /* Perform an expiry operation */ int autofs4_expire_run(struct super_block *sb, - struct vfsmount *mnt, - struct autofs_sb_info *sbi, - struct autofs_packet_expire __user *pkt_p) + struct vfsmount *mnt, + struct autofs_sb_info *sbi, + struct autofs_packet_expire __user *pkt_p) { struct autofs_packet_expire pkt; struct autofs_info *ino; struct dentry *dentry; int ret = 0; - memset(&pkt,0,sizeof pkt); + memset(&pkt, 0, sizeof(pkt)); pkt.hdr.proto_version = sbi->version; pkt.hdr.type = autofs_ptype_expire; - if ((dentry = autofs4_expire_indirect(sb, mnt, sbi, 0)) == NULL) + dentry = autofs4_expire_indirect(sb, mnt, sbi, 0); + if (!dentry) return -EAGAIN; pkt.len = dentry->d_name.len; @@ -544,7 +547,7 @@ int autofs4_expire_run(struct super_block *sb, pkt.name[pkt.len] = '\0'; dput(dentry); - if ( copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)) ) + if (copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire))) ret = -EFAULT; spin_lock(&sbi->fs_lock); @@ -573,7 +576,8 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_info *ino = autofs4_dentry_ino(dentry); /* This is synchronous because it makes the daemon a - little easier */ + * little easier + */ ret = autofs4_wait(sbi, dentry, NFY_EXPIRE); spin_lock(&sbi->fs_lock); @@ -588,8 +592,10 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, return ret; } -/* Call repeatedly until it returns -EAGAIN, meaning there's nothing - more to be done */ +/* + * Call repeatedly until it returns -EAGAIN, meaning there's nothing + * more to be done. + */ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt, struct autofs_sb_info *sbi, int __user *arg) { diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c index b3db517e89ec..8cf0e63389ae 100644 --- a/fs/autofs4/init.c +++ b/fs/autofs4/init.c @@ -1,14 +1,10 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/init.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/module.h> #include <linux/init.h> diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 4320faa2d2dc..ad03705aac43 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -1,15 +1,11 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/inode.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 2005-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 2005-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/kernel.h> #include <linux/slab.h> @@ -24,7 +20,9 @@ struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi) { - struct autofs_info *ino = kzalloc(sizeof(*ino), GFP_KERNEL); + struct autofs_info *ino; + + ino = kzalloc(sizeof(*ino), GFP_KERNEL); if (ino) { INIT_LIST_HEAD(&ino->active); INIT_LIST_HEAD(&ino->expiring); @@ -152,6 +150,7 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, while ((p = strsep(&options, ",")) != NULL) { int token; + if (!*p) continue; @@ -209,9 +208,9 @@ static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, int autofs4_fill_super(struct super_block *s, void *data, int silent) { - struct inode * root_inode; - struct dentry * root; - struct file * pipe; + struct inode *root_inode; + struct dentry *root; + struct file *pipe; int pipefd; struct autofs_sb_info *sbi; struct autofs_info *ino; @@ -222,7 +221,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; - DPRINTK("starting up, sbi = %p",sbi); + DPRINTK("starting up, sbi = %p", sbi); s->s_fs_info = sbi; sbi->magic = AUTOFS_SBI_MAGIC; diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index c6d7d3dbd52a..bdeb8838a901 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -1,16 +1,12 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/root.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/capability.h> #include <linux/errno.h> @@ -23,16 +19,18 @@ #include "autofs_i.h" -static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *); -static int autofs4_dir_unlink(struct inode *,struct dentry *); -static int autofs4_dir_rmdir(struct inode *,struct dentry *); -static int autofs4_dir_mkdir(struct inode *,struct dentry *,umode_t); -static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long); +static int autofs4_dir_symlink(struct inode *, struct dentry *, const char *); +static int autofs4_dir_unlink(struct inode *, struct dentry *); +static int autofs4_dir_rmdir(struct inode *, struct dentry *); +static int autofs4_dir_mkdir(struct inode *, struct dentry *, umode_t); +static long autofs4_root_ioctl(struct file *, unsigned int, unsigned long); #ifdef CONFIG_COMPAT -static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long); +static long autofs4_root_compat_ioctl(struct file *, + unsigned int, unsigned long); #endif static int autofs4_dir_open(struct inode *inode, struct file *file); -static struct dentry *autofs4_lookup(struct inode *,struct dentry *, unsigned int); +static struct dentry *autofs4_lookup(struct inode *, + struct dentry *, unsigned int); static struct vfsmount *autofs4_d_automount(struct path *); static int autofs4_d_manage(struct dentry *, bool); static void autofs4_dentry_release(struct dentry *); @@ -74,7 +72,9 @@ const struct dentry_operations autofs4_dentry_operations = { static void autofs4_add_active(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - struct autofs_info *ino = autofs4_dentry_ino(dentry); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(dentry); if (ino) { spin_lock(&sbi->lookup_lock); if (!ino->active_count) { @@ -84,13 +84,14 @@ static void autofs4_add_active(struct dentry *dentry) ino->active_count++; spin_unlock(&sbi->lookup_lock); } - return; } static void autofs4_del_active(struct dentry *dentry) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - struct autofs_info *ino = autofs4_dentry_ino(dentry); + struct autofs_info *ino; + + ino = autofs4_dentry_ino(dentry); if (ino) { spin_lock(&sbi->lookup_lock); ino->active_count--; @@ -100,7 +101,6 @@ static void autofs4_del_active(struct dentry *dentry) } spin_unlock(&sbi->lookup_lock); } - return; } static int autofs4_dir_open(struct inode *inode, struct file *file) @@ -320,7 +320,9 @@ static struct dentry *autofs4_mountpoint_changed(struct path *path) if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) { struct dentry *parent = dentry->d_parent; struct autofs_info *ino; - struct dentry *new = d_lookup(parent, &dentry->d_name); + struct dentry *new; + + new = d_lookup(parent, &dentry->d_name); if (!new) return NULL; ino = autofs4_dentry_ino(new); @@ -455,6 +457,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) * a mount-trap. */ struct inode *inode; + if (ino->flags & (AUTOFS_INF_EXPIRING | AUTOFS_INF_NO_RCU)) return 0; if (d_mountpoint(dentry)) @@ -494,7 +497,8 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) } /* Lookups in the root directory */ -static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) +static struct dentry *autofs4_lookup(struct inode *dir, + struct dentry *dentry, unsigned int flags) { struct autofs_sb_info *sbi; struct autofs_info *ino; @@ -513,9 +517,9 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, u autofs4_oz_mode(sbi)); active = autofs4_lookup_active(dentry); - if (active) { + if (active) return active; - } else { + else { /* * A dentry that is not within the root can never trigger a * mount operation, unless the directory already exists, so we @@ -526,7 +530,8 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, u return ERR_PTR(-ENOENT); /* Mark entries in the root as mount triggers */ - if (autofs_type_indirect(sbi->type) && IS_ROOT(dentry->d_parent)) + if (IS_ROOT(dentry->d_parent) && + autofs_type_indirect(sbi->type)) __managed_dentry_set_managed(dentry); ino = autofs4_new_ino(sbi); @@ -664,7 +669,6 @@ static void autofs_set_leaf_automount_flags(struct dentry *dentry) if (IS_ROOT(parent->d_parent)) return; managed_dentry_clear_managed(parent); - return; } static void autofs_clear_leaf_automount_flags(struct dentry *dentry) @@ -687,7 +691,6 @@ static void autofs_clear_leaf_automount_flags(struct dentry *dentry) if (d_child->next == &parent->d_subdirs && d_child->prev == &parent->d_subdirs) managed_dentry_set_managed(parent); - return; } static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) @@ -728,7 +731,8 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) return 0; } -static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +static int autofs4_dir_mkdir(struct inode *dir, + struct dentry *dentry, umode_t mode) { struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); @@ -768,7 +772,7 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t m /* Get/set timeout ioctl() operation */ #ifdef CONFIG_COMPAT static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi, - compat_ulong_t __user *p) + compat_ulong_t __user *p) { int rv; unsigned long ntimeout; @@ -787,7 +791,7 @@ static inline int autofs4_compat_get_set_timeout(struct autofs_sb_info *sbi, #endif static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi, - unsigned long __user *p) + unsigned long __user *p) { int rv; unsigned long ntimeout; @@ -805,13 +809,15 @@ static inline int autofs4_get_set_timeout(struct autofs_sb_info *sbi, } /* Return protocol version */ -static inline int autofs4_get_protover(struct autofs_sb_info *sbi, int __user *p) +static inline int autofs4_get_protover(struct autofs_sb_info *sbi, + int __user *p) { return put_user(sbi->version, p); } /* Return protocol sub version */ -static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user *p) +static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, + int __user *p) { return put_user(sbi->sub_version, p); } @@ -834,9 +840,9 @@ static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p) } /* Identify autofs4_dentries - this is so we can tell if there's - an extra dentry refcount or not. We only hold a refcount on the - dentry if its non-negative (ie, d_inode != NULL) -*/ + * an extra dentry refcount or not. We only hold a refcount on the + * dentry if its non-negative (ie, d_inode != NULL) + */ int is_autofs4_dentry(struct dentry *dentry) { return dentry && d_really_is_positive(dentry) && @@ -855,7 +861,7 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, void __user *p = (void __user *)arg; DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u", - cmd,arg,sbi,task_pgrp_nr(current)); + cmd, arg, sbi, task_pgrp_nr(current)); if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) || _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT) @@ -864,11 +870,11 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) return -EPERM; - switch(cmd) { + switch (cmd) { case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */ - return autofs4_wait_release(sbi,(autofs_wqt_t)arg,0); + return autofs4_wait_release(sbi, (autofs_wqt_t) arg, 0); case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */ - return autofs4_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT); + return autofs4_wait_release(sbi, (autofs_wqt_t) arg, -ENOENT); case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */ autofs4_catatonic_mode(sbi); return 0; @@ -888,10 +894,12 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, /* return a single thing to expire */ case AUTOFS_IOC_EXPIRE: - return autofs4_expire_run(inode->i_sb,filp->f_path.mnt,sbi, p); + return autofs4_expire_run(inode->i_sb, + filp->f_path.mnt, sbi, p); /* same as above, but can send multiple expires through pipe */ case AUTOFS_IOC_EXPIRE_MULTI: - return autofs4_expire_multi(inode->i_sb,filp->f_path.mnt,sbi, p); + return autofs4_expire_multi(inode->i_sb, + filp->f_path.mnt, sbi, p); default: return -ENOSYS; @@ -902,12 +910,13 @@ static long autofs4_root_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = file_inode(filp); + return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); } #ifdef CONFIG_COMPAT static long autofs4_root_compat_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg) + unsigned int cmd, unsigned long arg) { struct inode *inode = file_inode(filp); int ret; @@ -916,7 +925,7 @@ static long autofs4_root_compat_ioctl(struct file *filp, ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); else ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, - (unsigned long)compat_ptr(arg)); + (unsigned long) compat_ptr(arg)); return ret; } diff --git a/fs/autofs4/symlink.c b/fs/autofs4/symlink.c index 84e037d1d129..99aab00dc217 100644 --- a/fs/autofs4/symlink.c +++ b/fs/autofs4/symlink.c @@ -1,14 +1,10 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/symlink.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include "autofs_i.h" @@ -18,6 +14,7 @@ static const char *autofs4_get_link(struct dentry *dentry, { struct autofs_sb_info *sbi; struct autofs_info *ino; + if (!dentry) return ERR_PTR(-ECHILD); sbi = autofs4_sbi(dentry->d_sb); diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 35b755e79c2d..4e0c8d62dc1f 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -1,15 +1,11 @@ -/* -*- c -*- --------------------------------------------------------------- * - * - * linux/fs/autofs/waitq.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * Copyright 2001-2006 Ian Kent <raven@themaw.net> +/* + * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved + * Copyright 2001-2006 Ian Kent <raven@themaw.net> * * This file is part of the Linux kernel and is made available under * the terms of the GNU General Public License, version 2, or at your * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ + */ #include <linux/slab.h> #include <linux/time.h> @@ -18,7 +14,8 @@ #include "autofs_i.h" /* We make this a static variable rather than a part of the superblock; it - is better if we don't reassign numbers easily even across filesystems */ + * is better if we don't reassign numbers easily even across filesystems + */ static autofs_wqt_t autofs4_next_wait_queue = 1; /* These are the signals we allow interrupting a pending mount */ @@ -69,17 +66,19 @@ static int autofs4_write(struct autofs_sb_info *sbi, set_fs(KERNEL_DS); mutex_lock(&sbi->pipe_mutex); - while (bytes && - (wr = __vfs_write(file,data,bytes,&file->f_pos)) > 0) { + wr = __vfs_write(file, data, bytes, &file->f_pos); + while (bytes && wr) { data += wr; bytes -= wr; + wr = __vfs_write(file, data, bytes, &file->f_pos); } mutex_unlock(&sbi->pipe_mutex); set_fs(fs); /* Keep the currently executing process from receiving a - SIGPIPE unless it was already supposed to get one */ + * SIGPIPE unless it was already supposed to get one + */ if (wr == -EPIPE && !sigpipe) { spin_lock_irqsave(¤t->sighand->siglock, flags); sigdelset(¤t->pending.signal, SIGPIPE); @@ -103,9 +102,10 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, size_t pktsz; DPRINTK("wait id = 0x%08lx, name = %.*s, type=%d", - (unsigned long) wq->wait_queue_token, wq->name.len, wq->name.name, type); + (unsigned long) wq->wait_queue_token, + wq->name.len, wq->name.name, type); - memset(&pkt,0,sizeof pkt); /* For security reasons */ + memset(&pkt, 0, sizeof(pkt)); /* For security reasons */ pkt.hdr.proto_version = sbi->version; pkt.hdr.type = type; @@ -126,7 +126,8 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, } case autofs_ptype_expire_multi: { - struct autofs_packet_expire_multi *ep = &pkt.v4_pkt.expire_multi; + struct autofs_packet_expire_multi *ep = + &pkt.v4_pkt.expire_multi; pktsz = sizeof(*ep); @@ -231,7 +232,7 @@ autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr) if (wq->name.hash == qstr->hash && wq->name.len == qstr->len && wq->name.name && - !memcmp(wq->name.name, qstr->name, qstr->len)) + !memcmp(wq->name.name, qstr->name, qstr->len)) break; } return wq; @@ -248,7 +249,7 @@ autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr) static int validate_request(struct autofs_wait_queue **wait, struct autofs_sb_info *sbi, struct qstr *qstr, - struct dentry*dentry, enum autofs_notify notify) + struct dentry *dentry, enum autofs_notify notify) { struct autofs_wait_queue *wq; struct autofs_info *ino; @@ -322,8 +323,10 @@ static int validate_request(struct autofs_wait_queue **wait, * continue on and create a new request. */ if (!IS_ROOT(dentry)) { - if (d_really_is_positive(dentry) && d_unhashed(dentry)) { + if (d_unhashed(dentry) && + d_really_is_positive(dentry)) { struct dentry *parent = dentry->d_parent; + new = d_lookup(parent, &dentry->d_name); if (new) dentry = new; @@ -340,8 +343,8 @@ static int validate_request(struct autofs_wait_queue **wait, return 1; } -int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, - enum autofs_notify notify) +int autofs4_wait(struct autofs_sb_info *sbi, + struct dentry *dentry, enum autofs_notify notify) { struct autofs_wait_queue *wq; struct qstr qstr; @@ -411,7 +414,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, if (!wq) { /* Create a new wait queue */ - wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL); + wq = kmalloc(sizeof(struct autofs_wait_queue), GFP_KERNEL); if (!wq) { kfree(qstr.name); mutex_unlock(&sbi->wq_mutex); @@ -454,7 +457,9 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, (unsigned long) wq->wait_queue_token, wq->name.len, wq->name.name, notify); - /* autofs4_notify_daemon() may block; it will unlock ->wq_mutex */ + /* + * autofs4_notify_daemon() may block; it will unlock ->wq_mutex + */ autofs4_notify_daemon(sbi, wq, type); } else { wq->wait_ctr++; |