diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 798e468103b8..61f441409234 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -316,29 +316,12 @@ static inline int check_space(struct dm_table *t) */ static int lookup_device(const char *path, dev_t *dev) { - int r; - struct nameidata nd; - struct inode *inode; - - if ((r = path_lookup(path, LOOKUP_FOLLOW, &nd))) - return r; - - inode = nd.path.dentry->d_inode; - if (!inode) { - r = -ENOENT; - goto out; - } - - if (!S_ISBLK(inode->i_mode)) { - r = -ENOTBLK; - goto out; - } - - *dev = inode->i_rdev; - - out: - path_put(&nd.path); - return r; + struct block_device *bdev = lookup_bdev(path); + if (IS_ERR(bdev)) + return PTR_ERR(bdev); + *dev = bdev->bd_dev; + bdput(bdev); + return 0; } /* diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c index 28cc6787a800..9b6af7e74a65 100644 --- a/drivers/mtd/mtdsuper.c +++ b/drivers/mtd/mtdsuper.c @@ -125,7 +125,7 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags, int (*fill_super)(struct super_block *, void *, int), struct vfsmount *mnt) { - struct nameidata nd; + struct block_device *bdev; int mtdnr, ret; if (!dev_name) @@ -181,29 +181,20 @@ int get_sb_mtd(struct file_system_type *fs_type, int flags, /* try the old way - the hack where we allowed users to mount * /dev/mtdblock$(n) but didn't actually _use_ the blockdev */ - ret = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); - - DEBUG(1, "MTDSB: path_lookup() returned %d, inode %p\n", - ret, nd.path.dentry ? nd.path.dentry->d_inode : NULL); - - if (ret) + bdev = lookup_bdev(dev_name); + if (IS_ERR(bdev)) { + ret = PTR_ERR(bdev); + DEBUG(1, "MTDSB: lookup_bdev() returned %d\n", ret); return ret; + } + DEBUG(1, "MTDSB: lookup_bdev() returned 0\n"); ret = -EINVAL; - - if (!S_ISBLK(nd.path.dentry->d_inode->i_mode)) - goto out; - - if (nd.path.mnt->mnt_flags & MNT_NODEV) { - ret = -EACCES; - goto out; - } - - if (imajor(nd.path.dentry->d_inode) != MTD_BLOCK_MAJOR) + if (MAJOR(bdev->bd_dev) != MTD_BLOCK_MAJOR) goto not_an_MTD_device; - mtdnr = iminor(nd.path.dentry->d_inode); - path_put(&nd.path); + mtdnr = MINOR(bdev->bd_dev); + bdput(bdev); return get_sb_mtd_nr(fs_type, flags, dev_name, data, mtdnr, fill_super, mnt); @@ -213,10 +204,8 @@ not_an_MTD_device: printk(KERN_NOTICE "MTD: Attempt to mount non-MTD device \"%s\"\n", dev_name); -out: - path_put(&nd.path); + bdput(bdev); return ret; - } EXPORT_SYMBOL_GPL(get_sb_mtd); diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c index 2f5503902c37..78db4953a800 100644 --- a/fs/afs/mntpt.c +++ b/fs/afs/mntpt.c @@ -232,7 +232,7 @@ static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd) } mntget(newmnt); - err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts); + err = do_add_mount(newmnt, &nd->path, MNT_SHRINKABLE, &afs_vfsmounts); switch (err) { case 0: path_put(&nd->path); diff --git a/fs/block_dev.c b/fs/block_dev.c index dcf37cada369..aff54219e049 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -941,8 +941,10 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) * hooks: /n/, see "layering violations". */ ret = devcgroup_inode_permission(bdev->bd_inode, perm); - if (ret != 0) + if (ret != 0) { + bdput(bdev); return ret; + } ret = -ENXIO; file->f_mapping = bdev->bd_inode->i_mapping; @@ -1234,6 +1236,7 @@ fail: bdev = ERR_PTR(error); goto out; } +EXPORT_SYMBOL(lookup_bdev); /** * open_bdev_excl - open a block device by name and set it up for use diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index d82374c9e329..d2c8eef84f3c 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -226,7 +226,7 @@ static int add_mount_helper(struct vfsmount *newmnt, struct nameidata *nd, int err; mntget(newmnt); - err = do_add_mount(newmnt, nd, nd->path.mnt->mnt_flags, mntlist); + err = do_add_mount(newmnt, &nd->path, nd->path.mnt->mnt_flags, mntlist); switch (err) { case 0: path_put(&nd->path); diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 285b64a8b06e..488eb424f662 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -29,7 +29,7 @@ #define DEVPTS_DEFAULT_MODE 0600 extern int pty_limit; /* Config limit on Unix98 ptys */ -static DEFINE_IDR(allocated_ptys); +static DEFINE_IDA(allocated_ptys); static DEFINE_MUTEX(allocated_ptys_lock); static struct vfsmount *devpts_mnt; @@ -180,24 +180,24 @@ static struct dentry *get_node(int num) int devpts_new_index(void) { int index; - int idr_ret; + int ida_ret; retry: - if (!idr_pre_get(&allocated_ptys, GFP_KERNEL)) { + if (!ida_pre_get(&allocated_ptys, GFP_KERNEL)) { return -ENOMEM; } mutex_lock(&allocated_ptys_lock); - idr_ret = idr_get_new(&allocated_ptys, NULL, &index); - if (idr_ret < 0) { + ida_ret = ida_get_new(&allocated_ptys, &index); + if (ida_ret < 0) { mutex_unlock(&allocated_ptys_lock); - if (idr_ret == -EAGAIN) + if (ida_ret == -EAGAIN) goto retry; return -EIO; } if (index >= pty_limit) { - idr_remove(&allocated_ptys, index); + ida_remove(&allocated_ptys, index); mutex_unlock(&allocated_ptys_lock); return -EIO; } @@ -208,7 +208,7 @@ retry: void devpts_kill_index(int idx) { mutex_lock(&allocated_ptys_lock); - idr_remove(&allocated_ptys, idx); + ida_remove(&allocated_ptys, idx); mutex_unlock(&allocated_ptys_lock); } diff --git a/fs/dquot.c b/fs/dquot.c index 1346eebe74ce..8ec4d6cc7633 100644 --- a/fs/dquot.c +++ b/fs/dquot.c @@ -1793,6 +1793,21 @@ static int vfs_quota_on_remount(struct super_block *sb, int type) return ret; } +int vfs_quota_on_path(struct super_block *sb, int type, int format_id, + struct path *path) +{ + int error = security_quota_on(path->dentry); + if (error) + return error; + /* Quota file not on the same filesystem? */ + if (path->mnt->mnt_sb != sb) + error = -EXDEV; + else + error = vfs_quota_on_inode(path->dentry->d_inode, type, + format_id); + return error; +} + /* Actual function called from quotactl() */ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path, int remount) @@ -1804,19 +1819,10 @@ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path, return vfs_quota_on_remount(sb, type); error = path_lookup(path, LOOKUP_FOLLOW, &nd); - if (error < 0) - return error; - error = security_quota_on(nd.path.dentry); - if (error) - goto out_path; - /* Quota file not on the same filesystem? */ - if (nd.path.mnt->mnt_sb != sb) - error = -EXDEV; - else - error = vfs_quota_on_inode(nd.path.dentry->d_inode, type, - format_id); -out_path: - path_put(&nd.path); + if (!error) { + error = vfs_quota_on_path(sb, type, format_id, &nd.path); + path_put(&nd.path); + } return error; } @@ -2185,6 +2191,7 @@ EXPORT_SYMBOL(unregister_quota_format); EXPORT_SYMBOL(dqstats); EXPORT_SYMBOL(dq_data_lock); EXPORT_SYMBOL(vfs_quota_on); +EXPORT_SYMBOL(vfs_quota_on_path); EXPORT_SYMBOL(vfs_quota_on_mount); EXPORT_SYMBOL(vfs_quota_off); EXPORT_SYMBOL(vfs_quota_sync); diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 8ddced384674..f38a5afc39a1 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -2810,8 +2810,9 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id, journal_unlock_updates(EXT3_SB(sb)->s_journal); } + err = vfs_quota_on_path(sb, type, format_id, &nd.path); path_put(&nd.path); - return vfs_quota_on(sb, type, format_id, path, remount); + return err; } /* Read data from quotafile - avoid pagecache and such because we cannot afford diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b5479b1dff14..1e69f29a8c55 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3352,8 +3352,9 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); } + err = vfs_quota_on_path(sb, type, format_id, &nd.path); path_put(&nd.path); - return vfs_quota_on(sb, type, format_id, path, remount); + return err; } /* Read data from quotafile - avoid pagecache and such because we cannot afford diff --git a/fs/fcntl.c b/fs/fcntl.c index 61d625136813..ac4f7db9f134 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -49,73 +49,6 @@ static int get_close_on_exec(unsigned int fd) return res; } -/* - * locate_fd finds a free file descriptor in the open_fds fdset, - * expanding the fd arrays if necessary. Must be called with the - * file_lock held for write. - */ - -static int locate_fd(unsigned int orig_start, int cloexec) -{ - struct files_struct *files = current->files; - unsigned int newfd; - unsigned int start; - int error; - struct fdtable *fdt; - - spin_lock(&files->file_lock); -repeat: - fdt = files_fdtable(files); - /* - * Someone might have closed fd's in the range - * orig_start..fdt->next_fd - */ - start = orig_start; - if (start < files->next_fd) - start = files->next_fd; - - newfd = start; - if (start < fdt->max_fds) - newfd = find_next_zero_bit(fdt->open_fds->fds_bits, - fdt->max_fds, start); - - error = expand_files(files, newfd); - if (error < 0) - goto out; - - /* - * If we needed to expand the fs array we - * might have blocked - try again. - */ - if (error) - goto repeat; - - if (start <= files->next_fd) - files->next_fd = newfd + 1; - - FD_SET(newfd, fdt->open_fds); - if (cloexec) - FD_SET(newfd, fdt->close_on_exec); - else - FD_CLR(newfd, fdt->close_on_exec); - error = newfd; - -out: - spin_unlock(&files->file_lock); - return error; -} - -static int dupfd(struct file *file, unsigned int start, int cloexec) -{ - int fd = locate_fd(start, cloexec); - if (fd >= 0) - fd_install(fd, file); - else - fput(file); - - return fd; -} - asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags) { int err = -EBADF; @@ -130,31 +63,35 @@ asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags) return -EINVAL; spin_lock(&files->file_lock); - if (!(file = fcheck(oldfd))) - goto out_unlock; - get_file(file); /* We are now finished with oldfd */ - err = expand_files(files, newfd); + file = fcheck(oldfd); + if (unlikely(!file)) + goto Ebadf; if (unlikely(err < 0)) { if (err == -EMFILE) - err = -EBADF; - goto out_fput; + goto Ebadf; + goto out_unlock; } - - /* To avoid races with open() and dup(), we will mark the fd as - * in-use in the open-file bitmap throughout the entire dup2() - * process. This is quite safe: do_close() uses the fd array - * entry, not the bitmap, to decide what work needs to be - * done. --sct */ - /* Doesn't work. open() might be there first. --AV */ - - /* Yes. It's a race. In user space. Nothing sane to do */ + /* + * We need to detect attempts to do dup2() over allocated but still + * not finished descriptor. NB: OpenBSD avoids that at the price of + * extra work in their equivalent of fget() - they insert struct + * file immediately after grabbing descriptor, mark it larval if + * more work (e.g. actual opening) is needed and make sure that + * fget() treats larval files as absent. Potentially interesting, + * but while extra work in fget() is trivial, locking implications + * and amount of surgery on open()-related paths in VFS are not. + * FreeBSD fails with -EBADF in the same situation, NetBSD "solution" + * deadlocks in rather amusing ways, AFAICS. All of that is out of + * scope of POSIX or SUS, since neither considers shared descriptor + * tables and this condition does not arise without those. + */ err = -EBUSY; fdt = files_fdtable(files); tofree = fdt->fd[newfd]; if (!tofree && FD_ISSET(newfd, fdt->open_fds)) - goto out_fput; - + goto out_unlock; + get_file(file); rcu_assign_pointer(fdt->fd[newfd], file); FD_SET(newfd, fdt->open_fds); if (flags & O_CLOEXEC) @@ -165,17 +102,14 @@ asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags) if (tofree) filp_close(tofree, files); - err = newfd; -out: - return err; + + return newfd; + +Ebadf: + err = -EBADF; out_unlock: spin_unlock(&files->file_lock); - goto out; - -out_fput: - spin_unlock(&files->file_lock); - fput(file); - goto out; + return err; } asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd) @@ -194,10 +128,15 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd) asmlinkage long sys_dup(unsigned int fildes) { int ret = -EBADF; - struct file * file = fget(fildes); + struct file *file = fget(fildes); - if (file) - ret = dupfd(file, 0, 0); + if (file) { + ret = get_unused_fd(); + if (ret >= 0) + fd_install(ret, file); + else + fput(file); + } return ret; } @@ -322,8 +261,11 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg, case F_DUPFD_CLOEXEC: if (arg >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur) break; - get_file(filp); - err = dupfd(filp, arg, cmd == F_DUPFD_CLOEXEC); + err = alloc_fd(arg, cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0); + if (err >= 0) { + get_file(filp); + fd_install(err, filp); + } break; case F_GETFD: err = get_close_on_exec(fd) ? FD_CLOEXEC : 0; diff --git a/fs/file.c b/fs/file.c index d8773b19fe47..f313314f996f 100644 --- a/fs/file.c +++ b/fs/file.c @@ -6,6 +6,7 @@ * Manage the dynamic fd arrays in the process files_struct. */ +#include #include #include #include @@ -432,3 +433,63 @@ struct files_struct init_files = { }, .file_lock = __SPIN_LOCK_UNLOCKED(init_task.file_lock), }; + +/* + * allocate a file descriptor, mark it busy. + */ +int alloc_fd(unsigned start, unsigned flags) +{ + struct files_struct *files = current->files; + unsigned int fd; + int error; + struct fdtable *fdt; + + spin_lock(&files->file_lock); +repeat: + fdt = files_fdtable(files); + fd = start; + if (fd < files->next_fd) + fd = files->next_fd; + + if (fd < fdt->max_fds) + fd = find_next_zero_bit(fdt->open_fds->fds_bits, + fdt->max_fds, fd); + + error = expand_files(files, fd); + if (error < 0) + goto out; + + /* + * If we needed to expand the fs array we + * might have blocked - try again. + */ + if (error) + goto repeat; + + if (start <= files->next_fd) + files->next_fd = fd + 1; + + FD_SET(fd, fdt->open_fds); + if (flags & O_CLOEXEC) + FD_SET(fd, fdt->close_on_exec); + else + FD_CLR(fd, fdt->close_on_exec); + error = fd; +#if 1 + /* Sanity check */ + if (rcu_dereference(fdt->fd[fd]) != NULL) { + printk(KERN_WARNING "alloc_fd: slot %d not NULL!\n", fd); + rcu_assign_pointer(fdt->fd[fd], NULL); + } +#endif + +out: + spin_unlock(&files->file_lock); + return error; +} + +int get_unused_fd(void) +{ + return alloc_fd(0, 0); +} +EXPORT_SYMBOL(get_unused_fd); diff --git a/fs/namei.c b/fs/namei.c index a7b0a0b80128..4ea63ed5e791 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -274,7 +274,7 @@ int inode_permission(struct inode *inode, int mask) return retval; return security_inode_permission(inode, - mask & (MAY_READ|MAY_WRITE|MAY_EXEC)); + mask & (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND)); } /** @@ -1431,8 +1431,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir) * 3. We should have write and exec permissions on dir * 4. We can't do it if dir is immutable (done in permission()) */ -static inline int may_create(struct inode *dir, struct dentry *child, - struct nameidata *nd) +static inline int may_create(struct inode *dir, struct dentry *child) { if (child->d_inode) return -EEXIST; @@ -1504,7 +1503,7 @@ void unlock_rename(struct dentry *p1, struct dentry *p2) int vfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd) { - int error = may_create(dir, dentry, nd); + int error = may_create(dir, dentry); if (error) return error; @@ -1948,7 +1947,7 @@ EXPORT_SYMBOL_GPL(lookup_create); int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) { - int error = may_create(dir, dentry, NULL); + int error = may_create(dir, dentry); if (error) return error; @@ -2049,7 +2048,7 @@ asmlinkage long sys_mknod(const char __user *filename, int mode, unsigned dev) int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) { - int error = may_create(dir, dentry, NULL); + int error = may_create(dir, dentry); if (error) return error; @@ -2316,7 +2315,7 @@ asmlinkage long sys_unlink(const char __user *pathname) int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname) { - int error = may_create(dir, dentry, NULL); + int error = may_create(dir, dentry); if (error) return error; @@ -2386,7 +2385,7 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de if (!inode) return -ENOENT; - error = may_create(dir, new_dentry, NULL); + error = may_create(dir, new_dentry); if (error) return error; @@ -2595,7 +2594,7 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry, return error; if (!new_dentry->d_inode) - error = may_create(new_dir, new_dentry, NULL); + error = may_create(new_dir, new_dentry); else error = may_delete(new_dir, new_dentry, is_dir); if (error) diff --git a/fs/namespace.c b/fs/namespace.c index 411728c0c8bb..6e283c93b50d 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1667,31 +1667,31 @@ static noinline int do_new_mount(struct nameidata *nd, char *type, int flags, if (IS_ERR(mnt)) return PTR_ERR(mnt); - return do_add_mount(mnt, nd, mnt_flags, NULL); + return do_add_mount(mnt, &nd->path, mnt_flags, NULL); } /* * add a mount into a namespace's mount tree * - provide the option of adding the new mount to an expiration list */ -int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd, +int do_add_mount(struct vfsmount *newmnt, struct path *path, int mnt_flags, struct list_head *fslist) { int err; down_write(&namespace_sem); /* Something was mounted here while we slept */ - while (d_mountpoint(nd->path.dentry) && - follow_down(&nd->path.mnt, &nd->path.dentry)) + while (d_mountpoint(path->dentry) && + follow_down(&path->mnt, &path->dentry)) ; err = -EINVAL; - if (!check_mnt(nd->path.mnt)) + if (!check_mnt(path->mnt)) goto unlock; /* Refuse the same filesystem on the same mount point */ err = -EBUSY; - if (nd->path.mnt->mnt_sb == newmnt->mnt_sb && - nd->path.mnt->mnt_root == nd->path.dentry) + if (path->mnt->mnt_sb == newmnt->mnt_sb && + path->mnt->mnt_root == path->dentry) goto unlock; err = -EINVAL; @@ -1699,7 +1699,7 @@ int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd, goto unlock; newmnt->mnt_flags = mnt_flags; - if ((err = graft_tree(newmnt, &nd->path))) + if ((err = graft_tree(newmnt, path))) goto unlock; if (fslist) /* add to the specified expiration list */ diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 2f285ef76399..66df08dd1caf 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -129,7 +129,7 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) goto out_err; mntget(mnt); - err = do_add_mount(mnt, nd, nd->path.mnt->mnt_flags|MNT_SHRINKABLE, + err = do_add_mount(mnt, &nd->path, nd->path.mnt->mnt_flags|MNT_SHRINKABLE, &nfs_automount_list); if (err < 0) { mntput(mnt); diff --git a/fs/open.c b/fs/open.c index 52647be277a2..07da9359481c 100644 --- a/fs/open.c +++ b/fs/open.c @@ -963,62 +963,6 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) } EXPORT_SYMBOL(dentry_open); -/* - * Find an empty file descriptor entry, and mark it busy. - */ -int get_unused_fd_flags(int flags) -{ - struct files_struct * files = current->files; - int fd, error; - struct fdtable *fdt; - - spin_lock(&files->file_lock); - -repeat: - fdt = files_fdtable(files); - fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds, - files->next_fd); - - /* Do we need to expand the fd array or fd set? */ - error = expand_files(files, fd); - if (error < 0) - goto out; - - if (error) { - /* - * If we needed to expand the fs array we - * might have blocked - try again. - */ - goto repeat; - } - - FD_SET(fd, fdt->open_fds); - if (flags & O_CLOEXEC) - FD_SET(fd, fdt->close_on_exec); - else - FD_CLR(fd, fdt->close_on_exec); - files->next_fd = fd + 1; -#if 1 - /* Sanity check */ - if (fdt->fd[fd] != NULL) { - printk(KERN_WARNING "get_unused_fd: slot %d not NULL!\n", fd); - fdt->fd[fd] = NULL; - } -#endif - error = fd; - -out: - spin_unlock(&files->file_lock); - return error; -} - -int get_unused_fd(void) -{ - return get_unused_fd_flags(0); -} - -EXPORT_SYMBOL(get_unused_fd); - static void __put_unused_fd(struct files_struct *files, unsigned int fd) { struct fdtable *fdt = files_fdtable(files); diff --git a/fs/proc/generic.c b/fs/proc/generic.c index cb4096cc3fb7..4fb81e9c94e3 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -300,10 +300,10 @@ out: return rtn; } -static DEFINE_IDR(proc_inum_idr); +static DEFINE_IDA(proc_inum_ida); static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */ -#define PROC_DYNAMIC_FIRST 0xF0000000UL +#define PROC_DYNAMIC_FIRST 0xF0000000U /* * Return an inode number between PROC_DYNAMIC_FIRST and @@ -311,36 +311,33 @@ static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */ */ static unsigned int get_inode_number(void) { - int i, inum = 0; + unsigned int i; int error; retry: - if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0) + if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0) return 0; spin_lock(&proc_inum_lock); - error = idr_get_new(&proc_inum_idr, NULL, &i); + error = ida_get_new(&proc_inum_ida, &i); spin_unlock(&proc_inum_lock); if (error == -EAGAIN) goto retry; else if (error) return 0; - inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST; - - /* inum will never be more than 0xf0ffffff, so no check - * for overflow. - */ - - return inum; + if (i > UINT_MAX - PROC_DYNAMIC_FIRST) { + spin_lock(&proc_inum_lock); + ida_remove(&proc_inum_ida, i); + spin_unlock(&proc_inum_lock); + } + return PROC_DYNAMIC_FIRST + i; } static void release_inode_number(unsigned int inum) { - int id = (inum - PROC_DYNAMIC_FIRST) | ~MAX_ID_MASK; - spin_lock(&proc_inum_lock); - idr_remove(&proc_inum_idr, id); + ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST); spin_unlock(&proc_inum_lock); } diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 879e54d35c2d..282a13596c70 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -2076,8 +2076,8 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, return err; /* Quotafile not on the same filesystem? */ if (nd.path.mnt->mnt_sb != sb) { - path_put(&nd.path); - return -EXDEV; + err = -EXDEV; + goto out; } inode = nd.path.dentry->d_inode; /* We must not pack tails for quota files on reiserfs for quota IO to work */ @@ -2087,8 +2087,8 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, reiserfs_warning(sb, "reiserfs: Unpacking tail of quota file failed" " (%d). Cannot turn on quotas.", err); - path_put(&nd.path); - return -EINVAL; + err = -EINVAL; + goto out; } mark_inode_dirty(inode); } @@ -2109,13 +2109,15 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, /* Just start temporary transaction and finish it */ err = journal_begin(&th, sb, 1); if (err) - return err; + goto out; err = journal_end_sync(&th, sb, 1); if (err) - return err; + goto out; } + err = vfs_quota_on_path(sb, type, format_id, &nd.path); +out: path_put(&nd.path); - return vfs_quota_on(sb, type, format_id, path, 0); + return err; } /* Read data from quotafile - avoid pagecache and such because we cannot afford diff --git a/include/linux/file.h b/include/linux/file.h index 27c64bdc68c9..a20259e248a5 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -34,8 +34,9 @@ extern struct file *fget(unsigned int fd); extern struct file *fget_light(unsigned int fd, int *fput_needed); extern void set_close_on_exec(unsigned int fd, int flag); extern void put_filp(struct file *); +extern int alloc_fd(unsigned start, unsigned flags); extern int get_unused_fd(void); -extern int get_unused_fd_flags(int flags); +#define get_unused_fd_flags(flags) alloc_fd(0, (flags)) extern void put_unused_fd(unsigned int fd); extern void fd_install(unsigned int fd, struct file *file); diff --git a/include/linux/mount.h b/include/linux/mount.h index b5efaa2132ab..30a1d63b6fb5 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -105,7 +105,8 @@ extern struct vfsmount *vfs_kern_mount(struct file_system_type *type, struct nameidata; -extern int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd, +struct path; +extern int do_add_mount(struct vfsmount *newmnt, struct path *path, int mnt_flags, struct list_head *fslist); extern void mark_mounts_for_expiry(struct list_head *mounts); diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h index 742187f7a05c..ca6b9b5c8d52 100644 --- a/include/linux/quotaops.h +++ b/include/linux/quotaops.h @@ -43,6 +43,8 @@ int dquot_mark_dquot_dirty(struct dquot *dquot); int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path, int remount); +int vfs_quota_on_path(struct super_block *sb, int type, int format_id, + struct path *path); int vfs_quota_on_mount(struct super_block *sb, char *qf_name, int format_id, int type); int vfs_quota_off(struct super_block *sb, int type, int remount); diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 380d6474cf66..a72a5ad46ec5 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -3216,6 +3216,7 @@ int __init ip_rt_init(void) return rc; } +#ifdef CONFIG_SYSCTL /* * We really need to sanitize the damn ipv4 init order, then all * this nonsense will go away. @@ -3224,6 +3225,7 @@ void __init ip_static_sysctl_init(void) { register_sysctl_paths(ipv4_route_path, ipv4_route_table); } +#endif EXPORT_SYMBOL(__ip_select_ident); EXPORT_SYMBOL(ip_route_input);