diff options
Diffstat (limited to 'fs')
81 files changed, 561 insertions, 442 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 455aa207e67e..d4bf8caad8d0 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -109,6 +109,7 @@ source "fs/sysfs/Kconfig" config TMPFS bool "Virtual memory file system support (former shm fs)" + depends on SHMEM help Tmpfs is a file system which keeps all files in virtual memory. diff --git a/fs/afs/flock.c b/fs/afs/flock.c index 3ff8bdd18fb3..0931bc1325eb 100644 --- a/fs/afs/flock.c +++ b/fs/afs/flock.c @@ -21,7 +21,7 @@ static void afs_fl_release_private(struct file_lock *fl); static struct workqueue_struct *afs_lock_manager; static DEFINE_MUTEX(afs_lock_manager_mutex); -static struct file_lock_operations afs_lock_ops = { +static const struct file_lock_operations afs_lock_ops = { .fl_copy_lock = afs_fl_copy_lock, .fl_release_private = afs_fl_release_private, }; @@ -24,6 +24,7 @@ #include <linux/file.h> #include <linux/mm.h> #include <linux/mman.h> +#include <linux/mmu_context.h> #include <linux/slab.h> #include <linux/timer.h> #include <linux/aio.h> @@ -34,7 +35,6 @@ #include <asm/kmap_types.h> #include <asm/uaccess.h> -#include <asm/mmu_context.h> #if DEBUG > 1 #define dprintk printk @@ -595,51 +595,6 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id) } /* - * use_mm - * Makes the calling kernel thread take on the specified - * mm context. - * Called by the retry thread execute retries within the - * iocb issuer's mm context, so that copy_from/to_user - * operations work seamlessly for aio. - * (Note: this routine is intended to be called only - * from a kernel thread context) - */ -static void use_mm(struct mm_struct *mm) -{ - struct mm_struct *active_mm; - struct task_struct *tsk = current; - - task_lock(tsk); - active_mm = tsk->active_mm; - atomic_inc(&mm->mm_count); - tsk->mm = mm; - tsk->active_mm = mm; - switch_mm(active_mm, mm, tsk); - task_unlock(tsk); - - mmdrop(active_mm); -} - -/* - * unuse_mm - * Reverses the effect of use_mm, i.e. releases the - * specified mm context which was earlier taken on - * by the calling kernel thread - * (Note: this routine is intended to be called only - * from a kernel thread context) - */ -static void unuse_mm(struct mm_struct *mm) -{ - struct task_struct *tsk = current; - - task_lock(tsk); - tsk->mm = NULL; - /* active_mm is still 'mm' */ - enter_lazy_tlb(mm, tsk); - task_unlock(tsk); -} - -/* * Queue up a kiocb to be retried. Assumes that the kiocb * has already been marked as kicked, and places it on * the retry run list for the corresponding ioctx, if it diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c index 615d5496fe0f..dd376c124e71 100644 --- a/fs/befs/linuxvfs.c +++ b/fs/befs/linuxvfs.c @@ -842,7 +842,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent) sb->s_magic = BEFS_SUPER_MAGIC; /* Set real blocksize of fs */ sb_set_blocksize(sb, (ulong) befs_sb->block_size); - sb->s_op = (struct super_operations *) &befs_sops; + sb->s_op = &befs_sops; root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); if (IS_ERR(root)) { ret = PTR_ERR(root); diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 7c1e65d54872..442d94fe255c 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1280,9 +1280,6 @@ static int writenote(struct memelfnote *men, struct file *file, #define DUMP_WRITE(addr, nr) \ if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \ goto end_coredump; -#define DUMP_SEEK(off) \ - if (!dump_seek(file, (off))) \ - goto end_coredump; static void fill_elf_header(struct elfhdr *elf, int segs, u16 machine, u32 flags, u8 osabi) @@ -2016,7 +2013,8 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un goto end_coredump; /* Align to page */ - DUMP_SEEK(dataoff - foffset); + if (!dump_seek(file, dataoff - foffset)) + goto end_coredump; for (vma = first_vma(current, gate_vma); vma != NULL; vma = next_vma(vma, gate_vma)) { @@ -2027,33 +2025,19 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un for (addr = vma->vm_start; addr < end; addr += PAGE_SIZE) { struct page *page; - struct vm_area_struct *tmp_vma; - - if (get_user_pages(current, current->mm, addr, 1, 0, 1, - &page, &tmp_vma) <= 0) { - DUMP_SEEK(PAGE_SIZE); - } else { - if (page == ZERO_PAGE(0)) { - if (!dump_seek(file, PAGE_SIZE)) { - page_cache_release(page); - goto end_coredump; - } - } else { - void *kaddr; - flush_cache_page(tmp_vma, addr, - page_to_pfn(page)); - kaddr = kmap(page); - if ((size += PAGE_SIZE) > limit || - !dump_write(file, kaddr, - PAGE_SIZE)) { - kunmap(page); - page_cache_release(page); - goto end_coredump; - } - kunmap(page); - } + int stop; + + page = get_dump_page(addr); + if (page) { + void *kaddr = kmap(page); + stop = ((size += PAGE_SIZE) > limit) || + !dump_write(file, kaddr, PAGE_SIZE); + kunmap(page); page_cache_release(page); - } + } else + stop = !dump_seek(file, PAGE_SIZE); + if (stop) + goto end_coredump; } } diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 20fbeced472b..76285471073e 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1325,9 +1325,6 @@ static int writenote(struct memelfnote *men, struct file *file) #define DUMP_WRITE(addr, nr) \ if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \ goto end_coredump; -#define DUMP_SEEK(off) \ - if (!dump_seek(file, (off))) \ - goto end_coredump; static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs) { @@ -1518,6 +1515,7 @@ static int elf_fdpic_dump_segments(struct file *file, size_t *size, unsigned long *limit, unsigned long mm_flags) { struct vm_area_struct *vma; + int err = 0; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; @@ -1525,43 +1523,26 @@ static int elf_fdpic_dump_segments(struct file *file, size_t *size, if (!maydump(vma, mm_flags)) continue; - for (addr = vma->vm_start; - addr < vma->vm_end; - addr += PAGE_SIZE - ) { - struct vm_area_struct *vma; - struct page *page; - - if (get_user_pages(current, current->mm, addr, 1, 0, 1, - &page, &vma) <= 0) { - DUMP_SEEK(file->f_pos + PAGE_SIZE); - } - else if (page == ZERO_PAGE(0)) { - page_cache_release(page); - DUMP_SEEK(file->f_pos + PAGE_SIZE); - } - else { - void *kaddr; - - flush_cache_page(vma, addr, page_to_pfn(page)); - kaddr = kmap(page); - if ((*size += PAGE_SIZE) > *limit || - !dump_write(file, kaddr, PAGE_SIZE) - ) { - kunmap(page); - page_cache_release(page); - return -EIO; - } + for (addr = vma->vm_start; addr < vma->vm_end; + addr += PAGE_SIZE) { + struct page *page = get_dump_page(addr); + if (page) { + void *kaddr = kmap(page); + *size += PAGE_SIZE; + if (*size > *limit) + err = -EFBIG; + else if (!dump_write(file, kaddr, PAGE_SIZE)) + err = -EIO; kunmap(page); page_cache_release(page); - } + } else if (!dump_seek(file, file->f_pos + PAGE_SIZE)) + err = -EFBIG; + if (err) + goto out; } } - - return 0; - -end_coredump: - return -EFBIG; +out: + return err; } #endif @@ -1802,7 +1783,8 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs, goto end_coredump; } - DUMP_SEEK(dataoff); + if (!dump_seek(file, dataoff)) + goto end_coredump; if (elf_fdpic_dump_segments(file, &size, &limit, mm_flags) < 0) goto end_coredump; diff --git a/fs/block_dev.c b/fs/block_dev.c index 71e7e03ac343..5d1ed50bd46c 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1114,7 +1114,7 @@ EXPORT_SYMBOL(revalidate_disk); int check_disk_change(struct block_device *bdev) { struct gendisk *disk = bdev->bd_disk; - struct block_device_operations * bdops = disk->fops; + const struct block_device_operations *bdops = disk->fops; if (!bdops->media_changed) return 0; diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8b8192790011..6c4173146bb7 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -772,7 +772,7 @@ static void btree_invalidatepage(struct page *page, unsigned long offset) } } -static struct address_space_operations btree_aops = { +static const struct address_space_operations btree_aops = { .readpage = btree_readpage, .writepage = btree_writepage, .writepages = btree_writepages, diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 59cba180fe83..9096fd0ca3ca 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -55,13 +55,13 @@ struct btrfs_iget_args { struct btrfs_root *root; }; -static struct inode_operations btrfs_dir_inode_operations; -static struct inode_operations btrfs_symlink_inode_operations; -static struct inode_operations btrfs_dir_ro_inode_operations; -static struct inode_operations btrfs_special_inode_operations; -static struct inode_operations btrfs_file_inode_operations; -static struct address_space_operations btrfs_aops; -static struct address_space_operations btrfs_symlink_aops; +static const struct inode_operations btrfs_dir_inode_operations; +static const struct inode_operations btrfs_symlink_inode_operations; +static const struct inode_operations btrfs_dir_ro_inode_operations; +static const struct inode_operations btrfs_special_inode_operations; +static const struct inode_operations btrfs_file_inode_operations; +static const struct address_space_operations btrfs_aops; +static const struct address_space_operations btrfs_symlink_aops; static struct file_operations btrfs_dir_file_operations; static struct extent_io_ops btrfs_extent_io_ops; @@ -5201,7 +5201,7 @@ static int btrfs_permission(struct inode *inode, int mask) return generic_permission(inode, mask, btrfs_check_acl); } -static struct inode_operations btrfs_dir_inode_operations = { +static const struct inode_operations btrfs_dir_inode_operations = { .getattr = btrfs_getattr, .lookup = btrfs_lookup, .create = btrfs_create, @@ -5219,7 +5219,7 @@ static struct inode_operations btrfs_dir_inode_operations = { .removexattr = btrfs_removexattr, .permission = btrfs_permission, }; -static struct inode_operations btrfs_dir_ro_inode_operations = { +static const struct inode_operations btrfs_dir_ro_inode_operations = { .lookup = btrfs_lookup, .permission = btrfs_permission, }; @@ -5259,7 +5259,7 @@ static struct extent_io_ops btrfs_extent_io_ops = { * * For now we're avoiding this by dropping bmap. */ -static struct address_space_operations btrfs_aops = { +static const struct address_space_operations btrfs_aops = { .readpage = btrfs_readpage, .writepage = btrfs_writepage, .writepages = btrfs_writepages, @@ -5271,14 +5271,14 @@ static struct address_space_operations btrfs_aops = { .set_page_dirty = btrfs_set_page_dirty, }; -static struct address_space_operations btrfs_symlink_aops = { +static const struct address_space_operations btrfs_symlink_aops = { .readpage = btrfs_readpage, .writepage = btrfs_writepage, .invalidatepage = btrfs_invalidatepage, .releasepage = btrfs_releasepage, }; -static struct inode_operations btrfs_file_inode_operations = { +static const struct inode_operations btrfs_file_inode_operations = { .truncate = btrfs_truncate, .getattr = btrfs_getattr, .setattr = btrfs_setattr, @@ -5290,7 +5290,7 @@ static struct inode_operations btrfs_file_inode_operations = { .fallocate = btrfs_fallocate, .fiemap = btrfs_fiemap, }; -static struct inode_operations btrfs_special_inode_operations = { +static const struct inode_operations btrfs_special_inode_operations = { .getattr = btrfs_getattr, .setattr = btrfs_setattr, .permission = btrfs_permission, @@ -5299,7 +5299,7 @@ static struct inode_operations btrfs_special_inode_operations = { .listxattr = btrfs_listxattr, .removexattr = btrfs_removexattr, }; -static struct inode_operations btrfs_symlink_inode_operations = { +static const struct inode_operations btrfs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 6d6d06cb6dfc..2db17cd66fc5 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -51,7 +51,7 @@ #include "export.h" #include "compression.h" -static struct super_operations btrfs_super_ops; +static const struct super_operations btrfs_super_ops; static void btrfs_put_super(struct super_block *sb) { @@ -675,7 +675,7 @@ static int btrfs_unfreeze(struct super_block *sb) return 0; } -static struct super_operations btrfs_super_ops = { +static const struct super_operations btrfs_super_ops = { .delete_inode = btrfs_delete_inode, .put_super = btrfs_put_super, .sync_fs = btrfs_sync_fs, diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index 5e8bc99221cb..fea9e898c4ba 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -385,7 +385,7 @@ out_err: goto out; } -struct inode_operations cifs_dfs_referral_inode_operations = { +const struct inode_operations cifs_dfs_referral_inode_operations = { .follow_link = cifs_dfs_follow_mountpoint, }; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 3610e9958b4c..d79ce2e95c23 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -50,7 +50,7 @@ #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ #ifdef CONFIG_CIFS_QUOTA -static struct quotactl_ops cifs_quotactl_ops; +static const struct quotactl_ops cifs_quotactl_ops; #endif /* QUOTA */ int cifsFYI = 0; @@ -517,7 +517,7 @@ int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) return rc; } -static struct quotactl_ops cifs_quotactl_ops = { +static const struct quotactl_ops cifs_quotactl_ops = { .set_xquota = cifs_xquota_set, .get_xquota = cifs_xquota_get, .set_xstate = cifs_xstate_set, diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 094325e3f714..ac2b24c192f8 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -67,7 +67,7 @@ extern int cifs_setattr(struct dentry *, struct iattr *); extern const struct inode_operations cifs_file_inode_ops; extern const struct inode_operations cifs_symlink_inode_ops; -extern struct inode_operations cifs_dfs_referral_inode_operations; +extern const struct inode_operations cifs_dfs_referral_inode_operations; /* Functions related to files and directories */ diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 00b30a2d5466..542f625312f3 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -582,7 +582,7 @@ extern const struct inode_operations ecryptfs_dir_iops; extern const struct inode_operations ecryptfs_symlink_iops; extern const struct super_operations ecryptfs_sops; extern const struct dentry_operations ecryptfs_dops; -extern struct address_space_operations ecryptfs_aops; +extern const struct address_space_operations ecryptfs_aops; extern int ecryptfs_verbosity; extern unsigned int ecryptfs_message_buf_len; extern signed long ecryptfs_message_wait_timeout; diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index 5c6bab9786e3..05772aeaa8f4 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -545,7 +545,7 @@ static sector_t ecryptfs_bmap(struct address_space *mapping, sector_t block) return rc; } -struct address_space_operations ecryptfs_aops = { +const struct address_space_operations ecryptfs_aops = { .writepage = ecryptfs_writepage, .readpage = ecryptfs_readpage, .write_begin = ecryptfs_write_begin, diff --git a/fs/exec.c b/fs/exec.c index 172ceb6edde4..434dba778ccc 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -33,7 +33,7 @@ #include <linux/string.h> #include <linux/init.h> #include <linux/pagemap.h> -#include <linux/perf_counter.h> +#include <linux/perf_event.h> #include <linux/highmem.h> #include <linux/spinlock.h> #include <linux/key.h> @@ -923,7 +923,7 @@ void set_task_comm(struct task_struct *tsk, char *buf) task_lock(tsk); strlcpy(tsk->comm, buf, sizeof(tsk->comm)); task_unlock(tsk); - perf_counter_comm(tsk); + perf_event_comm(tsk); } int flush_old_exec(struct linux_binprm * bprm) @@ -997,7 +997,7 @@ int flush_old_exec(struct linux_binprm * bprm) * security domain: */ if (!get_dumpable(current->mm)) - perf_counter_exit_task(current); + perf_event_exit_task(current); /* An exec changes our domain. We are no longer part of the thread group */ diff --git a/fs/ext2/xip.c b/fs/ext2/xip.c index b72b85884223..c18fbf3e4068 100644 --- a/fs/ext2/xip.c +++ b/fs/ext2/xip.c @@ -20,7 +20,7 @@ __inode_direct_access(struct inode *inode, sector_t block, void **kaddr, unsigned long *pfn) { struct block_device *bdev = inode->i_sb->s_bdev; - struct block_device_operations *ops = bdev->bd_disk->fops; + const struct block_device_operations *ops = bdev->bd_disk->fops; sector_t sector; sector = block * (PAGE_SIZE / 512); /* ext2 block to bdev sector */ diff --git a/fs/ext3/super.c b/fs/ext3/super.c index a8d80a7f1105..72743d360509 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -720,7 +720,7 @@ static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, static ssize_t ext3_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); -static struct dquot_operations ext3_quota_operations = { +static const struct dquot_operations ext3_quota_operations = { .initialize = dquot_initialize, .drop = dquot_drop, .alloc_space = dquot_alloc_space, @@ -737,7 +737,7 @@ static struct dquot_operations ext3_quota_operations = { .destroy_dquot = dquot_destroy, }; -static struct quotactl_ops ext3_qctl_operations = { +static const struct quotactl_ops ext3_qctl_operations = { .quota_on = ext3_quota_on, .quota_off = vfs_quota_off, .quota_sync = vfs_quota_sync, diff --git a/fs/ext4/super.c b/fs/ext4/super.c index a6b1ab734728..df539ba27779 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -964,7 +964,7 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, static ssize_t ext4_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); -static struct dquot_operations ext4_quota_operations = { +static const struct dquot_operations ext4_quota_operations = { .initialize = dquot_initialize, .drop = dquot_drop, .alloc_space = dquot_alloc_space, @@ -985,7 +985,7 @@ static struct dquot_operations ext4_quota_operations = { .destroy_dquot = dquot_destroy, }; -static struct quotactl_ops ext4_qctl_operations = { +static const struct quotactl_ops ext4_qctl_operations = { .quota_on = ext4_quota_on, .quota_off = vfs_quota_off, .quota_sync = vfs_quota_sync, diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index a93b885311d8..06b7c2623f99 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -507,6 +507,13 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid, inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; INIT_LIST_HEAD(&inode->i_mapping->private_list); info = HUGETLBFS_I(inode); + /* + * The policy is initialized here even if we are creating a + * private inode because initialization simply creates an + * an empty rb tree and calls spin_lock_init(), later when we + * call mpol_free_shared_policy() it will just return because + * the rb tree will still be empty. + */ mpol_shared_policy_init(&info->policy, NULL); switch (mode & S_IFMT) { default: @@ -931,13 +938,19 @@ static struct file_system_type hugetlbfs_fs_type = { static struct vfsmount *hugetlbfs_vfsmount; -static int can_do_hugetlb_shm(void) +static int can_do_hugetlb_shm(int creat_flags) { - return capable(CAP_IPC_LOCK) || in_group_p(sysctl_hugetlb_shm_group); + if (creat_flags != HUGETLB_SHMFS_INODE) + return 0; + if (capable(CAP_IPC_LOCK)) + return 1; + if (in_group_p(sysctl_hugetlb_shm_group)) + return 1; + return 0; } struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, - struct user_struct **user) + struct user_struct **user, int creat_flags) { int error = -ENOMEM; struct file *file; @@ -949,7 +962,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, if (!hugetlbfs_vfsmount) return ERR_PTR(-ENOENT); - if (!can_do_hugetlb_shm()) { + if (!can_do_hugetlb_shm(creat_flags)) { *user = current_user(); if (user_shm_lock(size, *user)) { WARN_ONCE(1, diff --git a/fs/inode.c b/fs/inode.c index b2ba83d2c4e1..f5ff71cb3e2b 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -123,7 +123,7 @@ static void wake_up_inode(struct inode *inode) int inode_init_always(struct super_block *sb, struct inode *inode) { static const struct address_space_operations empty_aops; - static struct inode_operations empty_iops; + static const struct inode_operations empty_iops; static const struct file_operations empty_fops; struct address_space *const mapping = &inode->i_data; @@ -695,13 +695,15 @@ void unlock_new_inode(struct inode *inode) } #endif /* - * This is special! We do not need the spinlock - * when clearing I_LOCK, because we're guaranteed - * that nobody else tries to do anything about the - * state of the inode when it is locked, as we - * just created it (so there can be no old holders - * that haven't tested I_LOCK). + * This is special! We do not need the spinlock when clearing I_LOCK, + * because we're guaranteed that nobody else tries to do anything about + * the state of the inode when it is locked, as we just created it (so + * there can be no old holders that haven't tested I_LOCK). + * However we must emit the memory barrier so that other CPUs reliably + * see the clearing of I_LOCK after the other inode initialisation has + * completed. */ + smp_mb(); WARN_ON((inode->i_state & (I_LOCK|I_NEW)) != (I_LOCK|I_NEW)); inode->i_state &= ~(I_LOCK|I_NEW); wake_up_inode(inode); diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index 0035c021395a..9a80e8e595d0 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -123,7 +123,7 @@ static struct dentry *jffs2_get_parent(struct dentry *child) return d_obtain_alias(jffs2_iget(child->d_inode->i_sb, pino)); } -static struct export_operations jffs2_export_ops = { +static const struct export_operations jffs2_export_ops = { .get_parent = jffs2_get_parent, .fh_to_dentry = jffs2_fh_to_dentry, .fh_to_parent = jffs2_fh_to_parent, diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 4336adba952a..c81249fef11f 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -458,7 +458,7 @@ static void nlmclnt_locks_release_private(struct file_lock *fl) nlm_put_lockowner(fl->fl_u.nfs_fl.owner); } -static struct file_lock_operations nlmclnt_lock_ops = { +static const struct file_lock_operations nlmclnt_lock_ops = { .fl_copy_lock = nlmclnt_locks_copy_lock, .fl_release_private = nlmclnt_locks_release_private, }; diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index e577a78d7bac..d1001790fa9a 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -705,7 +705,7 @@ static int nlmsvc_same_owner(struct file_lock *fl1, struct file_lock *fl2) return fl1->fl_owner == fl2->fl_owner && fl1->fl_pid == fl2->fl_pid; } -struct lock_manager_operations nlmsvc_lock_operations = { +const struct lock_manager_operations nlmsvc_lock_operations = { .fl_compare_owner = nlmsvc_same_owner, .fl_notify = nlmsvc_notify_blocked, .fl_grant = nlmsvc_grant_deferred, diff --git a/fs/locks.c b/fs/locks.c index 19ee18a6829b..a8794f233bc9 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -434,7 +434,7 @@ static int lease_mylease_callback(struct file_lock *fl, struct file_lock *try) return fl->fl_file == try->fl_file; } -static struct lock_manager_operations lease_manager_ops = { +static const struct lock_manager_operations lease_manager_ops = { .fl_break = lease_break_callback, .fl_release_private = lease_release_private_callback, .fl_mylease = lease_mylease_callback, diff --git a/fs/nfs/client.c b/fs/nfs/client.c index e350bd6a2334..a7ce15d3c248 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -933,10 +933,6 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str goto out_error; nfs_server_set_fsinfo(server, &fsinfo); - error = bdi_init(&server->backing_dev_info); - if (error) - goto out_error; - /* Get some general file system info */ if (server->namelen == 0) { @@ -995,6 +991,12 @@ static struct nfs_server *nfs_alloc_server(void) return NULL; } + if (bdi_init(&server->backing_dev_info)) { + nfs_free_iostats(server->io_stats); + kfree(server); + return NULL; + } + return server; } diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 1434080aefeb..2ef4fecf3984 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -638,7 +638,7 @@ static void nfs4_fl_release_lock(struct file_lock *fl) nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); } -static struct file_lock_operations nfs4_fl_lock_ops = { +static const struct file_lock_operations nfs4_fl_lock_ops = { .fl_copy_lock = nfs4_fl_copy_lock, .fl_release_private = nfs4_fl_release_lock, }; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index de935692d40d..f1cc0587cfef 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2190,8 +2190,8 @@ static void nfs_kill_super(struct super_block *s) { struct nfs_server *server = NFS_SB(s); - bdi_unregister(&server->backing_dev_info); kill_anon_super(s); + bdi_unregister(&server->backing_dev_info); nfs_fscache_release_super_cookie(s); nfs_free_server(server); } diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 980a216a48c8..766d3d544544 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2163,7 +2163,7 @@ int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) return -EAGAIN; } -static struct lock_manager_operations nfsd_lease_mng_ops = { +static const struct lock_manager_operations nfsd_lease_mng_ops = { .fl_break = nfsd_break_deleg_cb, .fl_release_private = nfsd_release_deleg_cb, .fl_copy_lock = nfsd_copy_lock_deleg_cb, @@ -3368,7 +3368,7 @@ nfs4_transform_lock_offset(struct file_lock *lock) /* Hack!: For now, we're defining this just so we can use a pointer to it * as a unique cookie to identify our (NFSv4's) posix locks. */ -static struct lock_manager_operations nfsd_posix_mng_ops = { +static const struct lock_manager_operations nfsd_posix_mng_ops = { }; static inline void diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c index c668bca579c1..6a2711f4c321 100644 --- a/fs/nilfs2/btnode.c +++ b/fs/nilfs2/btnode.c @@ -46,7 +46,7 @@ void nilfs_btnode_cache_init_once(struct address_space *btnc) INIT_LIST_HEAD(&btnc->i_mmap_nonlinear); } -static struct address_space_operations def_btnode_aops = { +static const struct address_space_operations def_btnode_aops = { .sync_page = block_sync_page, }; diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 6bd84a0d8238..fc8278c77cdd 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -151,7 +151,7 @@ struct file_operations nilfs_file_operations = { .splice_read = generic_file_splice_read, }; -struct inode_operations nilfs_file_inode_operations = { +const struct inode_operations nilfs_file_inode_operations = { .truncate = nilfs_truncate, .setattr = nilfs_setattr, .permission = nilfs_permission, diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c index 1b3c2bb20da9..e6de0a27ab5d 100644 --- a/fs/nilfs2/gcinode.c +++ b/fs/nilfs2/gcinode.c @@ -52,7 +52,7 @@ #include "dat.h" #include "ifile.h" -static struct address_space_operations def_gcinode_aops = { +static const struct address_space_operations def_gcinode_aops = { .sync_page = block_sync_page, }; diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 807e584b163d..2d2c501deb54 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -238,7 +238,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, return size; } -struct address_space_operations nilfs_aops = { +const struct address_space_operations nilfs_aops = { .writepage = nilfs_writepage, .readpage = nilfs_readpage, .sync_page = block_sync_page, diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c index 156bf6091a96..b18c4998f8d0 100644 --- a/fs/nilfs2/mdt.c +++ b/fs/nilfs2/mdt.c @@ -427,12 +427,12 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc) } -static struct address_space_operations def_mdt_aops = { +static const struct address_space_operations def_mdt_aops = { .writepage = nilfs_mdt_write_page, .sync_page = block_sync_page, }; -static struct inode_operations def_mdt_iops; +static const struct inode_operations def_mdt_iops; static struct file_operations def_mdt_fops; /* diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index df70dadb336f..ed02e886fa79 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -448,7 +448,7 @@ out: return err; } -struct inode_operations nilfs_dir_inode_operations = { +const struct inode_operations nilfs_dir_inode_operations = { .create = nilfs_create, .lookup = nilfs_lookup, .link = nilfs_link, @@ -462,12 +462,12 @@ struct inode_operations nilfs_dir_inode_operations = { .permission = nilfs_permission, }; -struct inode_operations nilfs_special_inode_operations = { +const struct inode_operations nilfs_special_inode_operations = { .setattr = nilfs_setattr, .permission = nilfs_permission, }; -struct inode_operations nilfs_symlink_inode_operations = { +const struct inode_operations nilfs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index 724c63766e82..bad7368782d0 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -295,12 +295,12 @@ void nilfs_clear_gcdat_inode(struct the_nilfs *); * Inodes and files operations */ extern struct file_operations nilfs_dir_operations; -extern struct inode_operations nilfs_file_inode_operations; +extern const struct inode_operations nilfs_file_inode_operations; extern struct file_operations nilfs_file_operations; -extern struct address_space_operations nilfs_aops; -extern struct inode_operations nilfs_dir_inode_operations; -extern struct inode_operations nilfs_special_inode_operations; -extern struct inode_operations nilfs_symlink_inode_operations; +extern const struct address_space_operations nilfs_aops; +extern const struct inode_operations nilfs_dir_inode_operations; +extern const struct inode_operations nilfs_special_inode_operations; +extern const struct inode_operations nilfs_symlink_inode_operations; /* * filesystem type diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 55f3d6b60732..644e66727dd0 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -504,7 +504,7 @@ static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs) return 0; } -static struct super_operations nilfs_sops = { +static const struct super_operations nilfs_sops = { .alloc_inode = nilfs_alloc_inode, .destroy_inode = nilfs_destroy_inode, .dirty_inode = nilfs_dirty_inode, @@ -560,7 +560,7 @@ nilfs_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, nilfs_nfs_get_inode); } -static struct export_operations nilfs_export_ops = { +static const struct export_operations nilfs_export_ops = { .fh_to_dentry = nilfs_fh_to_dentry, .fh_to_parent = nilfs_fh_to_parent, .get_parent = nilfs_get_parent, diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h index cd0be3f5c3cd..a44b14cbceeb 100644 --- a/fs/ntfs/malloc.h +++ b/fs/ntfs/malloc.h @@ -47,7 +47,7 @@ static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask) return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM); /* return (void *)__get_free_page(gfp_mask); */ } - if (likely(size >> PAGE_SHIFT < num_physpages)) + if (likely((size >> PAGE_SHIFT) < totalram_pages)) return __vmalloc(size, gfp_mask, PAGE_KERNEL); return NULL; } diff --git a/fs/ocfs2/quota.h b/fs/ocfs2/quota.h index 3fb96fcd4c81..e5df9d170b0c 100644 --- a/fs/ocfs2/quota.h +++ b/fs/ocfs2/quota.h @@ -109,7 +109,7 @@ void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex); int ocfs2_read_quota_block(struct inode *inode, u64 v_block, struct buffer_head **bh); -extern struct dquot_operations ocfs2_quota_operations; +extern const struct dquot_operations ocfs2_quota_operations; extern struct quota_format_type ocfs2_quota_format; int ocfs2_quota_setup(void); diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c index 0578cc14b7a3..3cf0ec0acdd5 100644 --- a/fs/ocfs2/quota_global.c +++ b/fs/ocfs2/quota_global.c @@ -849,7 +849,7 @@ static void ocfs2_destroy_dquot(struct dquot *dquot) kmem_cache_free(ocfs2_dquot_cachep, dquot); } -struct dquot_operations ocfs2_quota_operations = { +const struct dquot_operations ocfs2_quota_operations = { .initialize = dquot_initialize, .drop = dquot_drop, .alloc_space = dquot_alloc_space, diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index a3f8871d21fd..faca4720aa47 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -965,7 +965,7 @@ static int ocfs2_quota_off(struct super_block *sb, int type, int remount) return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED); } -static struct quotactl_ops ocfs2_quotactl_ops = { +static const struct quotactl_ops ocfs2_quotactl_ops = { .quota_on = ocfs2_quota_on, .quota_off = ocfs2_quota_off, .quota_sync = vfs_quota_sync, diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c index c7275cfbdcfb..3680bae335b5 100644 --- a/fs/omfs/dir.c +++ b/fs/omfs/dir.c @@ -489,7 +489,7 @@ out: return ret; } -struct inode_operations omfs_dir_inops = { +const struct inode_operations omfs_dir_inops = { .lookup = omfs_lookup, .mkdir = omfs_mkdir, .rename = omfs_rename, diff --git a/fs/omfs/file.c b/fs/omfs/file.c index d17e774eaf45..4845fbb18e6e 100644 --- a/fs/omfs/file.c +++ b/fs/omfs/file.c @@ -333,11 +333,11 @@ struct file_operations omfs_file_operations = { .splice_read = generic_file_splice_read, }; -struct inode_operations omfs_file_inops = { +const struct inode_operations omfs_file_inops = { .truncate = omfs_truncate }; -struct address_space_operations omfs_aops = { +const struct address_space_operations omfs_aops = { .readpage = omfs_readpage, .readpages = omfs_readpages, .writepage = omfs_writepage, diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c index 379ae5fb4411..f3b7c1541f3a 100644 --- a/fs/omfs/inode.c +++ b/fs/omfs/inode.c @@ -278,7 +278,7 @@ static int omfs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } -static struct super_operations omfs_sops = { +static const struct super_operations omfs_sops = { .write_inode = omfs_write_inode, .delete_inode = omfs_delete_inode, .put_super = omfs_put_super, diff --git a/fs/omfs/omfs.h b/fs/omfs/omfs.h index 2bc0f0670406..df71039945ac 100644 --- a/fs/omfs/omfs.h +++ b/fs/omfs/omfs.h @@ -45,15 +45,15 @@ extern int omfs_clear_range(struct super_block *sb, u64 block, int count); /* dir.c */ extern struct file_operations omfs_dir_operations; -extern struct inode_operations omfs_dir_inops; +extern const struct inode_operations omfs_dir_inops; extern int omfs_make_empty(struct inode *inode, struct super_block *sb); extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header, u64 fsblock); /* file.c */ extern struct file_operations omfs_file_operations; -extern struct inode_operations omfs_file_inops; -extern struct address_space_operations omfs_aops; +extern const struct inode_operations omfs_file_inops; +extern const struct address_space_operations omfs_aops; extern void omfs_make_empty_table(struct buffer_head *bh, int offset); extern int omfs_shrink_inode(struct inode *inode); diff --git a/fs/partitions/check.c b/fs/partitions/check.c index fbeaddf595d3..7b685e10cbad 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -581,7 +581,7 @@ try_scan: } if (from + size > get_capacity(disk)) { - struct block_device_operations *bdops = disk->fops; + const struct block_device_operations *bdops = disk->fops; unsigned long long capacity; printk(KERN_WARNING diff --git a/fs/proc/base.c b/fs/proc/base.c index 6f742f6658a9..55c4c805a756 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -447,7 +447,7 @@ static int proc_oom_score(struct task_struct *task, char *buffer) do_posix_clock_monotonic_gettime(&uptime); read_lock(&tasklist_lock); - points = badness(task, uptime.tv_sec); + points = badness(task->group_leader, uptime.tv_sec); read_unlock(&tasklist_lock); return sprintf(buffer, "%lu\n", points); } @@ -999,11 +999,17 @@ static ssize_t oom_adjust_read(struct file *file, char __user *buf, struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); char buffer[PROC_NUMBUF]; size_t len; - int oom_adjust; + int oom_adjust = OOM_DISABLE; + unsigned long flags; if (!task) return -ESRCH; - oom_adjust = task->oomkilladj; + + if (lock_task_sighand(task, &flags)) { + oom_adjust = task->signal->oom_adj; + unlock_task_sighand(task, &flags); + } + put_task_struct(task); len = snprintf(buffer, sizeof(buffer), "%i\n", oom_adjust); @@ -1015,32 +1021,44 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { struct task_struct *task; - char buffer[PROC_NUMBUF], *end; - int oom_adjust; + char buffer[PROC_NUMBUF]; + long oom_adjust; + unsigned long flags; + int err; memset(buffer, 0, sizeof(buffer)); if (count > sizeof(buffer) - 1) count = sizeof(buffer) - 1; if (copy_from_user(buffer, buf, count)) return -EFAULT; - oom_adjust = simple_strtol(buffer, &end, 0); + + err = strict_strtol(strstrip(buffer), 0, &oom_adjust); + if (err) + return -EINVAL; if ((oom_adjust < OOM_ADJUST_MIN || oom_adjust > OOM_ADJUST_MAX) && oom_adjust != OOM_DISABLE) return -EINVAL; - if (*end == '\n') - end++; + task = get_proc_task(file->f_path.dentry->d_inode); if (!task) return -ESRCH; - if (oom_adjust < task->oomkilladj && !capable(CAP_SYS_RESOURCE)) { + if (!lock_task_sighand(task, &flags)) { + put_task_struct(task); + return -ESRCH; + } + + if (oom_adjust < task->signal->oom_adj && !capable(CAP_SYS_RESOURCE)) { + unlock_task_sighand(task, &flags); put_task_struct(task); return -EACCES; } - task->oomkilladj = oom_adjust; + + task->signal->oom_adj = oom_adjust; + + unlock_task_sighand(task, &flags); put_task_struct(task); - if (end - buffer == 0) - return -EIO; - return end - buffer; + + return count; } static const struct file_operations proc_oom_adjust_operations = { diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 59b43a068872..f06f45b42181 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -328,43 +328,12 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) return -EFAULT; } else if (is_vmalloc_addr((void *)start)) { char * elf_buf; - struct vm_struct *m; - unsigned long curstart = start; - unsigned long cursize = tsz; elf_buf = kzalloc(tsz, GFP_KERNEL); if (!elf_buf) return -ENOMEM; - - read_lock(&vmlist_lock); - for (m=vmlist; m && cursize; m=m->next) { - unsigned long vmstart; - unsigned long vmsize; - unsigned long msize = m->size - PAGE_SIZE; - - if (((unsigned long)m->addr + msize) < - curstart) - continue; - if ((unsigned long)m->addr > (curstart + - cursize)) - break; - vmstart = (curstart < (unsigned long)m->addr ? - (unsigned long)m->addr : curstart); - if (((unsigned long)m->addr + msize) > - (curstart + cursize)) - vmsize = curstart + cursize - vmstart; - else - vmsize = (unsigned long)m->addr + - msize - vmstart; - curstart = vmstart + vmsize; - cursize -= vmsize; - /* don't dump ioremap'd stuff! (TA) */ - if (m->flags & VM_IOREMAP) - continue; - memcpy(elf_buf + (vmstart - start), - (char *)vmstart, vmsize); - } - read_unlock(&vmlist_lock); + vread(elf_buf, (char *)start, tsz); + /* we have to zero-fill user buffer even if no read */ if (copy_to_user(buffer, elf_buf, tsz)) { kfree(elf_buf); return -EFAULT; diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index d5c410d47fae..171e052c07b3 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -81,9 +81,11 @@ static int meminfo_proc_show(struct seq_file *m, void *v) "Writeback: %8lu kB\n" "AnonPages: %8lu kB\n" "Mapped: %8lu kB\n" + "Shmem: %8lu kB\n" "Slab: %8lu kB\n" "SReclaimable: %8lu kB\n" "SUnreclaim: %8lu kB\n" + "KernelStack: %8lu kB\n" "PageTables: %8lu kB\n" #ifdef CONFIG_QUICKLIST "Quicklists: %8lu kB\n" @@ -124,10 +126,12 @@ static int meminfo_proc_show(struct seq_file *m, void *v) K(global_page_state(NR_WRITEBACK)), K(global_page_state(NR_ANON_PAGES)), K(global_page_state(NR_FILE_MAPPED)), + K(global_page_state(NR_SHMEM)), K(global_page_state(NR_SLAB_RECLAIMABLE) + global_page_state(NR_SLAB_UNRECLAIMABLE)), K(global_page_state(NR_SLAB_RECLAIMABLE)), K(global_page_state(NR_SLAB_UNRECLAIMABLE)), + global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024, K(global_page_state(NR_PAGETABLE)), #ifdef CONFIG_QUICKLIST K(quicklist_total_size()), diff --git a/fs/proc/page.c b/fs/proc/page.c index 2707c6c7a20f..2281c2cbfe2b 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -2,6 +2,7 @@ #include <linux/compiler.h> #include <linux/fs.h> #include <linux/init.h> +#include <linux/ksm.h> #include <linux/mm.h> #include <linux/mmzone.h> #include <linux/proc_fs.h> @@ -95,6 +96,8 @@ static const struct file_operations proc_kpagecount_operations = { #define KPF_UNEVICTABLE 18 #define KPF_NOPAGE 20 +#define KPF_KSM 21 + /* kernel hacking assistances * WARNING: subject to change, never rely on them! */ @@ -137,6 +140,8 @@ static u64 get_uflags(struct page *page) u |= 1 << KPF_MMAP; if (PageAnon(page)) u |= 1 << KPF_ANON; + if (PageKsm(page)) + u |= 1 << KPF_KSM; /* * compound pages: export both head/tail info diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 9bd8be1d235c..59e98fea34a4 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -465,6 +465,10 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, return 0; } +#define CLEAR_REFS_ALL 1 +#define CLEAR_REFS_ANON 2 +#define CLEAR_REFS_MAPPED 3 + static ssize_t clear_refs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -472,13 +476,15 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, char buffer[PROC_NUMBUF], *end; struct mm_struct *mm; struct vm_area_struct *vma; + int type; memset(buffer, 0, sizeof(buffer)); if (count > sizeof(buffer) - 1) count = sizeof(buffer) - 1; if (copy_from_user(buffer, buf, count)) return -EFAULT; - if (!simple_strtol(buffer, &end, 0)) + type = simple_strtol(buffer, &end, 0); + if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED) return -EINVAL; if (*end == '\n') end++; @@ -494,9 +500,23 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, down_read(&mm->mmap_sem); for (vma = mm->mmap; vma; vma = vma->vm_next) { clear_refs_walk.private = vma; - if (!is_vm_hugetlb_page(vma)) - walk_page_range(vma->vm_start, vma->vm_end, - &clear_refs_walk); + if (is_vm_hugetlb_page(vma)) + continue; + /* + * Writing 1 to /proc/pid/clear_refs affects all pages. + * + * Writing 2 to /proc/pid/clear_refs only affects + * Anonymous pages. + * + * Writing 3 to /proc/pid/clear_refs only affects file + * mapped pages. + */ + if (type == CLEAR_REFS_ANON && vma->vm_file) + continue; + if (type == CLEAR_REFS_MAPPED && !vma->vm_file) + continue; + walk_page_range(vma->vm_start, vma->vm_end, + &clear_refs_walk); } flush_tlb_mm(mm); up_read(&mm->mmap_sem); diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 38f7bd559f35..39b49c42a7ed 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -1839,7 +1839,7 @@ EXPORT_SYMBOL(dquot_commit_info); /* * Definitions of diskquota operations. */ -struct dquot_operations dquot_operations = { +const struct dquot_operations dquot_operations = { .initialize = dquot_initialize, .drop = dquot_drop, .alloc_space = dquot_alloc_space, @@ -2461,7 +2461,7 @@ out: } EXPORT_SYMBOL(vfs_set_dqinfo); -struct quotactl_ops vfs_quotactl_ops = { +const struct quotactl_ops vfs_quotactl_ops = { .quota_on = vfs_quota_on, .quota_off = vfs_quota_off, .quota_sync = vfs_quota_sync, diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 7adea74d6a8a..f0ad05f38022 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -612,7 +612,7 @@ static int reiserfs_mark_dquot_dirty(struct dquot *); static int reiserfs_write_info(struct super_block *, int); static int reiserfs_quota_on(struct super_block *, int, int, char *, int); -static struct dquot_operations reiserfs_quota_operations = { +static const struct dquot_operations reiserfs_quota_operations = { .initialize = dquot_initialize, .drop = dquot_drop, .alloc_space = dquot_alloc_space, @@ -629,7 +629,7 @@ static struct dquot_operations reiserfs_quota_operations = { .destroy_dquot = dquot_destroy, }; -static struct quotactl_ops reiserfs_qctl_operations = { +static const struct quotactl_ops reiserfs_qctl_operations = { .quota_on = reiserfs_quota_on, .quota_off = vfs_quota_off, .quota_sync = vfs_quota_sync, diff --git a/fs/romfs/super.c b/fs/romfs/super.c index 4ab3c03d8f95..47f132df0c3f 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -284,7 +284,7 @@ static const struct file_operations romfs_dir_operations = { .readdir = romfs_readdir, }; -static struct inode_operations romfs_dir_inode_operations = { +static const struct inode_operations romfs_dir_inode_operations = { .lookup = romfs_lookup, }; diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index cb5fc57e370b..6c197ef53add 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -44,7 +44,7 @@ #include "squashfs.h" static struct file_system_type squashfs_fs_type; -static struct super_operations squashfs_super_ops; +static const struct super_operations squashfs_super_ops; static int supported_squashfs_filesystem(short major, short minor, short comp) { @@ -444,7 +444,7 @@ static struct file_system_type squashfs_fs_type = { .fs_flags = FS_REQUIRES_DEV }; -static struct super_operations squashfs_super_ops = { +static const struct super_operations squashfs_super_ops = { .alloc_inode = squashfs_alloc_inode, .destroy_inode = squashfs_destroy_inode, .statfs = squashfs_statfs, diff --git a/fs/super.c b/fs/super.c index b03fea8fbfb6..0e7207b9815c 100644 --- a/fs/super.c +++ b/fs/super.c @@ -54,7 +54,7 @@ DEFINE_SPINLOCK(sb_lock); static struct super_block *alloc_super(struct file_system_type *type) { struct super_block *s = kzalloc(sizeof(struct super_block), GFP_USER); - static struct super_operations default_op; + static const struct super_operations default_op; if (s) { if (security_sb_alloc(s)) { diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c index ee1ce68fd98b..076ca50e9933 100644 --- a/fs/ubifs/budget.c +++ b/fs/ubifs/budget.c @@ -715,7 +715,7 @@ long long ubifs_get_free_space_nolock(struct ubifs_info *c) * ubifs_get_free_space - return amount of free space. * @c: UBIFS file-system description object * - * This function calculates and retuns amount of free space to report to + * This function calculates and returns amount of free space to report to * user-space. */ long long ubifs_get_free_space(struct ubifs_info *c) diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c index f3a7945527fb..4775af401167 100644 --- a/fs/ubifs/commit.c +++ b/fs/ubifs/commit.c @@ -510,7 +510,7 @@ int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot) int lnum, offs, len, err = 0, uninitialized_var(last_level), child_cnt; int first = 1, iip; struct ubifs_debug_info *d = c->dbg; - union ubifs_key lower_key, upper_key, l_key, u_key; + union ubifs_key uninitialized_var(lower_key), upper_key, l_key, u_key; unsigned long long uninitialized_var(last_sqnum); struct ubifs_idx_node *idx; struct list_head list; diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index ce2cd8343618..dbc093afd946 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -210,6 +210,20 @@ const char *dbg_cstate(int cmt_state) } } +const char *dbg_jhead(int jhead) +{ + switch (jhead) { + case GCHD: + return "0 (GC)"; + case BASEHD: + return "1 (base)"; + case DATAHD: + return "2 (data)"; + default: + return "unknown journal head"; + } +} + static void dump_ch(const struct ubifs_ch *ch) { printk(KERN_DEBUG "\tmagic %#x\n", le32_to_cpu(ch->magic)); @@ -623,8 +637,9 @@ void dbg_dump_budg(struct ubifs_info *c) /* If we are in R/O mode, journal heads do not exist */ if (c->jheads) for (i = 0; i < c->jhead_cnt; i++) - printk(KERN_DEBUG "\tjhead %d\t LEB %d\n", - c->jheads[i].wbuf.jhead, c->jheads[i].wbuf.lnum); + printk(KERN_DEBUG "\tjhead %s\t LEB %d\n", + dbg_jhead(c->jheads[i].wbuf.jhead), + c->jheads[i].wbuf.lnum); for (rb = rb_first(&c->buds); rb; rb = rb_next(rb)) { bud = rb_entry(rb, struct ubifs_bud, rb); printk(KERN_DEBUG "\tbud LEB %d\n", bud->lnum); @@ -648,9 +663,90 @@ void dbg_dump_budg(struct ubifs_info *c) void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp) { - printk(KERN_DEBUG "LEB %d lprops: free %d, dirty %d (used %d), " - "flags %#x\n", lp->lnum, lp->free, lp->dirty, - c->leb_size - lp->free - lp->dirty, lp->flags); + int i, spc, dark = 0, dead = 0; + struct rb_node *rb; + struct ubifs_bud *bud; + + spc = lp->free + lp->dirty; + if (spc < c->dead_wm) + dead = spc; + else + dark = ubifs_calc_dark(c, spc); + + if (lp->flags & LPROPS_INDEX) + printk(KERN_DEBUG "LEB %-7d free %-8d dirty %-8d used %-8d " + "free + dirty %-8d flags %#x (", lp->lnum, lp->free, + lp->dirty, c->leb_size - spc, spc, lp->flags); + else + printk(KERN_DEBUG "LEB %-7d free %-8d dirty %-8d used %-8d " + "free + dirty %-8d dark %-4d dead %-4d nodes fit %-3d " + "flags %#-4x (", lp->lnum, lp->free, lp->dirty, + c->leb_size - spc, spc, dark, dead, + (int)(spc / UBIFS_MAX_NODE_SZ), lp->flags); + + if (lp->flags & LPROPS_TAKEN) { + if (lp->flags & LPROPS_INDEX) + printk(KERN_CONT "index, taken"); + else + printk(KERN_CONT "taken"); + } else { + const char *s; + + if (lp->flags & LPROPS_INDEX) { + switch (lp->flags & LPROPS_CAT_MASK) { + case LPROPS_DIRTY_IDX: + s = "dirty index"; + break; + case LPROPS_FRDI_IDX: + s = "freeable index"; + break; + default: + s = "index"; + } + } else { + switch (lp->flags & LPROPS_CAT_MASK) { + case LPROPS_UNCAT: + s = "not categorized"; + break; + case LPROPS_DIRTY: + s = "dirty"; + break; + case LPROPS_FREE: + s = "free"; + break; + case LPROPS_EMPTY: + s = "empty"; + break; + case LPROPS_FREEABLE: + s = "freeable"; + break; + default: + s = NULL; + break; + } + } + printk(KERN_CONT "%s", s); + } + + for (rb = rb_first((struct rb_root *)&c->buds); rb; rb = rb_next(rb)) { + bud = rb_entry(rb, struct ubifs_bud, rb); + if (bud->lnum == lp->lnum) { + int head = 0; + for (i = 0; i < c->jhead_cnt; i++) { + if (lp->lnum == c->jheads[i].wbuf.lnum) { + printk(KERN_CONT ", jhead %s", + dbg_jhead(i)); + head = 1; + } + } + if (!head) + printk(KERN_CONT ", bud of jhead %s", + dbg_jhead(bud->jhead)); + } + } + if (lp->lnum == c->gc_lnum) + printk(KERN_CONT ", GC LEB"); + printk(KERN_CONT ")\n"); } void dbg_dump_lprops(struct ubifs_info *c) @@ -724,7 +820,7 @@ void dbg_dump_leb(const struct ubifs_info *c, int lnum) printk(KERN_DEBUG "(pid %d) start dumping LEB %d\n", current->pid, lnum); - sleb = ubifs_scan(c, lnum, 0, c->dbg->buf); + sleb = ubifs_scan(c, lnum, 0, c->dbg->buf, 0); if (IS_ERR(sleb)) { ubifs_err("scan error %d", (int)PTR_ERR(sleb)); return; @@ -909,8 +1005,10 @@ out: ubifs_msg("saved lprops statistics dump"); dbg_dump_lstats(&d->saved_lst); ubifs_get_lp_stats(c, &lst); + ubifs_msg("current lprops statistics dump"); - dbg_dump_lstats(&d->saved_lst); + dbg_dump_lstats(&lst); + spin_lock(&c->space_lock); dbg_dump_budg(c); spin_unlock(&c->space_lock); diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h index c1cd73b2e06e..29d960101ea6 100644 --- a/fs/ubifs/debug.h +++ b/fs/ubifs/debug.h @@ -271,6 +271,7 @@ void ubifs_debugging_exit(struct ubifs_info *c); /* Dump functions */ const char *dbg_ntype(int type); const char *dbg_cstate(int cmt_state); +const char *dbg_jhead(int jhead); const char *dbg_get_key_dump(const struct ubifs_info *c, const union ubifs_key *key); void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode); @@ -321,6 +322,8 @@ void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat, int dbg_check_lprops(struct ubifs_info *c); int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode, int row, int col); +int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode, + loff_t size); /* Force the use of in-the-gaps method for testing */ @@ -425,6 +428,7 @@ void dbg_debugfs_exit_fs(struct ubifs_info *c); #define dbg_ntype(type) "" #define dbg_cstate(cmt_state) "" +#define dbg_jhead(jhead) "" #define dbg_get_key_dump(c, key) ({}) #define dbg_dump_inode(c, inode) ({}) #define dbg_dump_node(c, node) ({}) @@ -460,6 +464,7 @@ void dbg_debugfs_exit_fs(struct ubifs_info *c); #define dbg_check_heap(c, heap, cat, add_pos) ({}) #define dbg_check_lprops(c) 0 #define dbg_check_lpt_nodes(c, cnode, row, col) 0 +#define dbg_check_inode_size(c, inode, size) 0 #define dbg_force_in_the_gaps_enabled 0 #define dbg_force_in_the_gaps() 0 #define dbg_failure_mode 0 diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index 6d34dc7e33e1..2e6481a7701c 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -21,34 +21,32 @@ */ /* - * This file implements VFS file and inode operations of regular files, device + * This file implements VFS file and inode operations for regular files, device * nodes and symlinks as well as address space operations. * - * UBIFS uses 2 page flags: PG_private and PG_checked. PG_private is set if the - * page is dirty and is used for budgeting purposes - dirty pages should not be - * budgeted. The PG_checked flag is set if full budgeting is required for the - * page e.g., when it corresponds to a file hole or it is just beyond the file - * size. The budgeting is done in 'ubifs_write_begin()', because it is OK to - * fail in this function, and the budget is released in 'ubifs_write_end()'. So - * the PG_private and PG_checked flags carry the information about how the page - * was budgeted, to make it possible to release the budget properly. + * UBIFS uses 2 page flags: @PG_private and @PG_checked. @PG_private is set if + * the page is dirty and is used for optimization purposes - dirty pages are + * not budgeted so the flag shows that 'ubifs_write_end()' should not release + * the budget for this page. The @PG_checked flag is set if full budgeting is + * required for the page e.g., when it corresponds to a file hole or it is + * beyond the file size. The budgeting is done in 'ubifs_write_begin()', because + * it is OK to fail in this function, and the budget is released in + * 'ubifs_write_end()'. So the @PG_private and @PG_checked flags carry + * information about how the page was budgeted, to make it possible to release + * the budget properly. * - * A thing to keep in mind: inode's 'i_mutex' is locked in most VFS operations - * we implement. However, this is not true for '->writepage()', which might be - * called with 'i_mutex' unlocked. For example, when pdflush is performing - * write-back, it calls 'writepage()' with unlocked 'i_mutex', although the - * inode has 'I_LOCK' flag in this case. At "normal" work-paths 'i_mutex' is - * locked in '->writepage', e.g. in "sys_write -> alloc_pages -> direct reclaim - * path'. So, in '->writepage()' we are only guaranteed that the page is - * locked. + * A thing to keep in mind: inode @i_mutex is locked in most VFS operations we + * implement. However, this is not true for 'ubifs_writepage()', which may be + * called with @i_mutex unlocked. For example, when pdflush is doing background + * write-back, it calls 'ubifs_writepage()' with unlocked @i_mutex. At "normal" + * work-paths the @i_mutex is locked in 'ubifs_writepage()', e.g. in the + * "sys_write -> alloc_pages -> direct reclaim path". So, in 'ubifs_writepage()' + * we are only guaranteed that the page is locked. * - * Similarly, 'i_mutex' does not have to be locked in readpage(), e.g., - * readahead path does not have it locked ("sys_read -> generic_file_aio_read - * -> ondemand_readahead -> readpage"). In case of readahead, 'I_LOCK' flag is - * not set as well. However, UBIFS disables readahead. - * - * This, for example means that there might be 2 concurrent '->writepage()' - * calls for the same inode, but different inode dirty pages. + * Similarly, @i_mutex is not always locked in 'ubifs_readpage()', e.g., the + * read-ahead path does not lock it ("sys_read -> generic_file_aio_read -> + * ondemand_readahead -> readpage"). In case of readahead, @I_LOCK flag is not + * set as well. However, UBIFS disables readahead. */ #include "ubifs.h" @@ -449,9 +447,9 @@ static int ubifs_write_begin(struct file *file, struct address_space *mapping, /* * We change whole page so no need to load it. But we * have to set the @PG_checked flag to make the further - * code the page is new. This might be not true, but it - * is better to budget more that to read the page from - * the media. + * code know that the page is new. This might be not + * true, but it is better to budget more than to read + * the page from the media. */ SetPageChecked(page); skipped_read = 1; @@ -497,8 +495,8 @@ static int ubifs_write_begin(struct file *file, struct address_space *mapping, } /* - * Whee, we aquired budgeting quickly - without involving - * garbage-collection, committing or forceing write-back. We return + * Whee, we acquired budgeting quickly - without involving + * garbage-collection, committing or forcing write-back. We return * with @ui->ui_mutex locked if we are appending pages, and unlocked * otherwise. This is an optimization (slightly hacky though). */ @@ -562,7 +560,7 @@ static int ubifs_write_end(struct file *file, struct address_space *mapping, /* * Return 0 to force VFS to repeat the whole operation, or the - * error code if 'do_readpage()' failes. + * error code if 'do_readpage()' fails. */ copied = do_readpage(page); goto out; @@ -1175,11 +1173,11 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode, ui->ui_size = inode->i_size; /* Truncation changes inode [mc]time */ inode->i_mtime = inode->i_ctime = ubifs_current_time(inode); - /* The other attributes may be changed at the same time as well */ + /* Other attributes may be changed at the same time as well */ do_attr_changes(inode, attr); - err = ubifs_jnl_truncate(c, inode, old_size, new_size); mutex_unlock(&ui->ui_mutex); + out_budg: if (budgeted) ubifs_release_budget(c, &req); diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c index f0f5f15d384e..618c2701d3a7 100644 --- a/fs/ubifs/gc.c +++ b/fs/ubifs/gc.c @@ -529,7 +529,7 @@ int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp) * We scan the entire LEB even though we only really need to scan up to * (c->leb_size - lp->free). */ - sleb = ubifs_scan(c, lnum, 0, c->sbuf); + sleb = ubifs_scan(c, lnum, 0, c->sbuf, 0); if (IS_ERR(sleb)) return PTR_ERR(sleb); diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c index 762a7d6cec73..e589fedaf1ef 100644 --- a/fs/ubifs/io.c +++ b/fs/ubifs/io.c @@ -297,7 +297,7 @@ static enum hrtimer_restart wbuf_timer_callback_nolock(struct hrtimer *timer) { struct ubifs_wbuf *wbuf = container_of(timer, struct ubifs_wbuf, timer); - dbg_io("jhead %d", wbuf->jhead); + dbg_io("jhead %s", dbg_jhead(wbuf->jhead)); wbuf->need_sync = 1; wbuf->c->need_wbuf_sync = 1; ubifs_wake_up_bgt(wbuf->c); @@ -314,7 +314,8 @@ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf) if (wbuf->no_timer) return; - dbg_io("set timer for jhead %d, %llu-%llu millisecs", wbuf->jhead, + dbg_io("set timer for jhead %s, %llu-%llu millisecs", + dbg_jhead(wbuf->jhead), div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC), div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta, USEC_PER_SEC)); @@ -351,8 +352,8 @@ int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf) /* Write-buffer is empty or not seeked */ return 0; - dbg_io("LEB %d:%d, %d bytes, jhead %d", - wbuf->lnum, wbuf->offs, wbuf->used, wbuf->jhead); + dbg_io("LEB %d:%d, %d bytes, jhead %s", + wbuf->lnum, wbuf->offs, wbuf->used, dbg_jhead(wbuf->jhead)); ubifs_assert(!(c->vfs_sb->s_flags & MS_RDONLY)); ubifs_assert(!(wbuf->avail & 7)); ubifs_assert(wbuf->offs + c->min_io_size <= c->leb_size); @@ -401,7 +402,7 @@ int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs, { const struct ubifs_info *c = wbuf->c; - dbg_io("LEB %d:%d, jhead %d", lnum, offs, wbuf->jhead); + dbg_io("LEB %d:%d, jhead %s", lnum, offs, dbg_jhead(wbuf->jhead)); ubifs_assert(lnum >= 0 && lnum < c->leb_cnt); ubifs_assert(offs >= 0 && offs <= c->leb_size); ubifs_assert(offs % c->min_io_size == 0 && !(offs & 7)); @@ -508,9 +509,9 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len) struct ubifs_info *c = wbuf->c; int err, written, n, aligned_len = ALIGN(len, 8), offs; - dbg_io("%d bytes (%s) to jhead %d wbuf at LEB %d:%d", len, - dbg_ntype(((struct ubifs_ch *)buf)->node_type), wbuf->jhead, - wbuf->lnum, wbuf->offs + wbuf->used); + dbg_io("%d bytes (%s) to jhead %s wbuf at LEB %d:%d", len, + dbg_ntype(((struct ubifs_ch *)buf)->node_type), + dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs + wbuf->used); ubifs_assert(len > 0 && wbuf->lnum >= 0 && wbuf->lnum < c->leb_cnt); ubifs_assert(wbuf->offs >= 0 && wbuf->offs % c->min_io_size == 0); ubifs_assert(!(wbuf->offs & 7) && wbuf->offs <= c->leb_size); @@ -535,8 +536,8 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len) memcpy(wbuf->buf + wbuf->used, buf, len); if (aligned_len == wbuf->avail) { - dbg_io("flush jhead %d wbuf to LEB %d:%d", - wbuf->jhead, wbuf->lnum, wbuf->offs); + dbg_io("flush jhead %s wbuf to LEB %d:%d", + dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs); err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs, c->min_io_size, wbuf->dtype); @@ -564,8 +565,8 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len) * minimal I/O unit. We have to fill and flush write-buffer and switch * to the next min. I/O unit. */ - dbg_io("flush jhead %d wbuf to LEB %d:%d", - wbuf->jhead, wbuf->lnum, wbuf->offs); + dbg_io("flush jhead %s wbuf to LEB %d:%d", + dbg_jhead(wbuf->jhead), wbuf->lnum, wbuf->offs); memcpy(wbuf->buf + wbuf->used, buf, wbuf->avail); err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs, c->min_io_size, wbuf->dtype); @@ -698,8 +699,8 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len, int err, rlen, overlap; struct ubifs_ch *ch = buf; - dbg_io("LEB %d:%d, %s, length %d, jhead %d", lnum, offs, - dbg_ntype(type), len, wbuf->jhead); + dbg_io("LEB %d:%d, %s, length %d, jhead %s", lnum, offs, + dbg_ntype(type), len, dbg_jhead(wbuf->jhead)); ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0); ubifs_assert(!(offs & 7) && offs < c->leb_size); ubifs_assert(type >= 0 && type < UBIFS_NODE_TYPES_CNT); diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c index 64b5f3a309f5..d321baeca68d 100644 --- a/fs/ubifs/journal.c +++ b/fs/ubifs/journal.c @@ -158,7 +158,7 @@ again: * some. But the write-buffer mutex has to be unlocked because * GC also takes it. */ - dbg_jnl("no free space jhead %d, run GC", jhead); + dbg_jnl("no free space in jhead %s, run GC", dbg_jhead(jhead)); mutex_unlock(&wbuf->io_mutex); lnum = ubifs_garbage_collect(c, 0); @@ -173,7 +173,8 @@ again: * because we dropped @wbuf->io_mutex, so try once * again. */ - dbg_jnl("GC couldn't make a free LEB for jhead %d", jhead); + dbg_jnl("GC couldn't make a free LEB for jhead %s", + dbg_jhead(jhead)); if (retries++ < 2) { dbg_jnl("retry (%d)", retries); goto again; @@ -184,7 +185,7 @@ again: } mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); - dbg_jnl("got LEB %d for jhead %d", lnum, jhead); + dbg_jnl("got LEB %d for jhead %s", lnum, dbg_jhead(jhead)); avail = c->leb_size - wbuf->offs - wbuf->used; if (wbuf->lnum != -1 && avail >= len) { @@ -255,7 +256,8 @@ static int write_node(struct ubifs_info *c, int jhead, void *node, int len, *lnum = c->jheads[jhead].wbuf.lnum; *offs = c->jheads[jhead].wbuf.offs + c->jheads[jhead].wbuf.used; - dbg_jnl("jhead %d, LEB %d:%d, len %d", jhead, *lnum, *offs, len); + dbg_jnl("jhead %s, LEB %d:%d, len %d", + dbg_jhead(jhead), *lnum, *offs, len); ubifs_prepare_node(c, node, len, 0); return ubifs_wbuf_write_nolock(wbuf, node, len); @@ -285,7 +287,8 @@ static int write_head(struct ubifs_info *c, int jhead, void *buf, int len, *lnum = c->jheads[jhead].wbuf.lnum; *offs = c->jheads[jhead].wbuf.offs + c->jheads[jhead].wbuf.used; - dbg_jnl("jhead %d, LEB %d:%d, len %d", jhead, *lnum, *offs, len); + dbg_jnl("jhead %s, LEB %d:%d, len %d", + dbg_jhead(jhead), *lnum, *offs, len); err = ubifs_wbuf_write_nolock(wbuf, buf, len); if (err) diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h index 5fa27ea031ba..0f530c684f0b 100644 --- a/fs/ubifs/key.h +++ b/fs/ubifs/key.h @@ -229,23 +229,6 @@ static inline void xent_key_init(const struct ubifs_info *c, } /** - * xent_key_init_hash - initialize extended attribute entry key without - * re-calculating hash function. - * @c: UBIFS file-system description object - * @key: key to initialize - * @inum: host inode number - * @hash: extended attribute entry name hash - */ -static inline void xent_key_init_hash(const struct ubifs_info *c, - union ubifs_key *key, ino_t inum, - uint32_t hash) -{ - ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK)); - key->u32[0] = inum; - key->u32[1] = hash | (UBIFS_XENT_KEY << UBIFS_S_KEY_HASH_BITS); -} - -/** * xent_key_init_flash - initialize on-flash extended attribute entry key. * @c: UBIFS file-system description object * @k: key to initialize @@ -295,22 +278,15 @@ static inline void data_key_init(const struct ubifs_info *c, } /** - * data_key_init_flash - initialize on-flash data key. + * highest_data_key - get the highest possible data key for an inode. * @c: UBIFS file-system description object - * @k: key to initialize + * @key: key to initialize * @inum: inode number - * @block: block number */ -static inline void data_key_init_flash(const struct ubifs_info *c, void *k, - ino_t inum, unsigned int block) +static inline void highest_data_key(const struct ubifs_info *c, + union ubifs_key *key, ino_t inum) { - union ubifs_key *key = k; - - ubifs_assert(!(block & ~UBIFS_S_KEY_BLOCK_MASK)); - key->j32[0] = cpu_to_le32(inum); - key->j32[1] = cpu_to_le32(block | - (UBIFS_DATA_KEY << UBIFS_S_KEY_BLOCK_BITS)); - memset(k + 8, 0, UBIFS_MAX_KEY_LEN - 8); + data_key_init(c, key, inum, UBIFS_S_KEY_BLOCK_MASK); } /** @@ -554,4 +530,5 @@ static inline unsigned long long key_max_inode_size(const struct ubifs_info *c) return 0; } } + #endif /* !__UBIFS_KEY_H__ */ diff --git a/fs/ubifs/log.c b/fs/ubifs/log.c index 56e33772a1ee..c345e125f42c 100644 --- a/fs/ubifs/log.c +++ b/fs/ubifs/log.c @@ -169,8 +169,8 @@ void ubifs_add_bud(struct ubifs_info *c, struct ubifs_bud *bud) */ c->bud_bytes += c->leb_size - bud->start; - dbg_log("LEB %d:%d, jhead %d, bud_bytes %lld", bud->lnum, - bud->start, bud->jhead, c->bud_bytes); + dbg_log("LEB %d:%d, jhead %s, bud_bytes %lld", bud->lnum, + bud->start, dbg_jhead(bud->jhead), c->bud_bytes); spin_unlock(&c->buds_lock); } @@ -355,16 +355,16 @@ static void remove_buds(struct ubifs_info *c) * heads (non-closed buds). */ c->cmt_bud_bytes += wbuf->offs - bud->start; - dbg_log("preserve %d:%d, jhead %d, bud bytes %d, " + dbg_log("preserve %d:%d, jhead %s, bud bytes %d, " "cmt_bud_bytes %lld", bud->lnum, bud->start, - bud->jhead, wbuf->offs - bud->start, + dbg_jhead(bud->jhead), wbuf->offs - bud->start, c->cmt_bud_bytes); bud->start = wbuf->offs; } else { c->cmt_bud_bytes += c->leb_size - bud->start; - dbg_log("remove %d:%d, jhead %d, bud bytes %d, " + dbg_log("remove %d:%d, jhead %s, bud bytes %d, " "cmt_bud_bytes %lld", bud->lnum, bud->start, - bud->jhead, c->leb_size - bud->start, + dbg_jhead(bud->jhead), c->leb_size - bud->start, c->cmt_bud_bytes); rb_erase(p1, &c->buds); /* @@ -429,7 +429,8 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum) if (lnum == -1 || offs == c->leb_size) continue; - dbg_log("add ref to LEB %d:%d for jhead %d", lnum, offs, i); + dbg_log("add ref to LEB %d:%d for jhead %s", + lnum, offs, dbg_jhead(i)); ref = buf + len; ref->ch.node_type = UBIFS_REF_NODE; ref->lnum = cpu_to_le32(lnum); @@ -695,7 +696,7 @@ int ubifs_consolidate_log(struct ubifs_info *c) lnum = c->ltail_lnum; write_lnum = lnum; while (1) { - sleb = ubifs_scan(c, lnum, 0, c->sbuf); + sleb = ubifs_scan(c, lnum, 0, c->sbuf, 0); if (IS_ERR(sleb)) { err = PTR_ERR(sleb); goto out_free; diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c index 4cdd284dea56..4d4ca388889b 100644 --- a/fs/ubifs/lprops.c +++ b/fs/ubifs/lprops.c @@ -281,7 +281,7 @@ void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops, case LPROPS_FREE: if (add_to_lpt_heap(c, lprops, cat)) break; - /* No more room on heap so make it uncategorized */ + /* No more room on heap so make it un-categorized */ cat = LPROPS_UNCAT; /* Fall through */ case LPROPS_UNCAT: @@ -375,8 +375,8 @@ void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops, * @lprops: LEB properties * * A LEB may have fallen off of the bottom of a heap, and ended up as - * uncategorized even though it has enough space for us now. If that is the case - * this function will put the LEB back onto a heap. + * un-categorized even though it has enough space for us now. If that is the + * case this function will put the LEB back onto a heap. */ void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops) { @@ -436,10 +436,10 @@ int ubifs_categorize_lprops(const struct ubifs_info *c, /** * change_category - change LEB properties category. * @c: UBIFS file-system description object - * @lprops: LEB properties to recategorize + * @lprops: LEB properties to re-categorize * * LEB properties are categorized to enable fast find operations. When the LEB - * properties change they must be recategorized. + * properties change they must be re-categorized. */ static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops) { @@ -461,21 +461,18 @@ static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops) } /** - * calc_dark - calculate LEB dark space size. + * ubifs_calc_dark - calculate LEB dark space size. * @c: the UBIFS file-system description object * @spc: amount of free and dirty space in the LEB * - * This function calculates amount of dark space in an LEB which has @spc bytes - * of free and dirty space. Returns the calculations result. + * This function calculates and returns amount of dark space in an LEB which + * has @spc bytes of free and dirty space. * - * Dark space is the space which is not always usable - it depends on which - * nodes are written in which order. E.g., if an LEB has only 512 free bytes, - * it is dark space, because it cannot fit a large data node. So UBIFS cannot - * count on this LEB and treat these 512 bytes as usable because it is not true - * if, for example, only big chunks of uncompressible data will be written to - * the FS. + * UBIFS is trying to account the space which might not be usable, and this + * space is called "dark space". For example, if an LEB has only %512 free + * bytes, it is dark space, because it cannot fit a large data node. */ -static int calc_dark(struct ubifs_info *c, int spc) +int ubifs_calc_dark(const struct ubifs_info *c, int spc) { ubifs_assert(!(spc & 7)); @@ -518,7 +515,7 @@ static int is_lprops_dirty(struct ubifs_info *c, struct ubifs_lprops *lprops) * @free: new free space amount * @dirty: new dirty space amount * @flags: new flags - * @idx_gc_cnt: change to the count of idx_gc list + * @idx_gc_cnt: change to the count of @idx_gc list * * This function changes LEB properties (@free, @dirty or @flag). However, the * property which has the %LPROPS_NC value is not changed. Returns a pointer to @@ -535,7 +532,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c, { /* * This is the only function that is allowed to change lprops, so we - * discard the const qualifier. + * discard the "const" qualifier. */ struct ubifs_lprops *lprops = (struct ubifs_lprops *)lp; @@ -575,7 +572,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c, if (old_spc < c->dead_wm) c->lst.total_dead -= old_spc; else - c->lst.total_dark -= calc_dark(c, old_spc); + c->lst.total_dark -= ubifs_calc_dark(c, old_spc); c->lst.total_used -= c->leb_size - old_spc; } @@ -616,7 +613,7 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c, if (new_spc < c->dead_wm) c->lst.total_dead += new_spc; else - c->lst.total_dark += calc_dark(c, new_spc); + c->lst.total_dark += ubifs_calc_dark(c, new_spc); c->lst.total_used += c->leb_size - new_spc; } @@ -1096,7 +1093,7 @@ static int scan_check_cb(struct ubifs_info *c, } } - sleb = ubifs_scan(c, lnum, 0, c->dbg->buf); + sleb = ubifs_scan(c, lnum, 0, c->dbg->buf, 0); if (IS_ERR(sleb)) { /* * After an unclean unmount, empty and freeable LEBs @@ -1107,7 +1104,7 @@ static int scan_check_cb(struct ubifs_info *c, "- continuing checking"); lst->empty_lebs += 1; lst->total_free += c->leb_size; - lst->total_dark += calc_dark(c, c->leb_size); + lst->total_dark += ubifs_calc_dark(c, c->leb_size); return LPT_SCAN_CONTINUE; } @@ -1117,7 +1114,7 @@ static int scan_check_cb(struct ubifs_info *c, "- continuing checking"); lst->total_free += lp->free; lst->total_dirty += lp->dirty; - lst->total_dark += calc_dark(c, c->leb_size); + lst->total_dark += ubifs_calc_dark(c, c->leb_size); return LPT_SCAN_CONTINUE; } data->err = PTR_ERR(sleb); @@ -1235,7 +1232,7 @@ static int scan_check_cb(struct ubifs_info *c, if (spc < c->dead_wm) lst->total_dead += spc; else - lst->total_dark += calc_dark(c, spc); + lst->total_dark += ubifs_calc_dark(c, spc); } ubifs_scan_destroy(sleb); diff --git a/fs/ubifs/master.c b/fs/ubifs/master.c index a88f33801b98..28beaeedadc0 100644 --- a/fs/ubifs/master.c +++ b/fs/ubifs/master.c @@ -29,7 +29,8 @@ * @c: UBIFS file-system description object * * This function scans the master node LEBs and search for the latest master - * node. Returns zero in case of success and a negative error code in case of + * node. Returns zero in case of success, %-EUCLEAN if there master area is + * corrupted and requires recovery, and a negative error code in case of * failure. */ static int scan_for_master(struct ubifs_info *c) @@ -40,7 +41,7 @@ static int scan_for_master(struct ubifs_info *c) lnum = UBIFS_MST_LNUM; - sleb = ubifs_scan(c, lnum, 0, c->sbuf); + sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1); if (IS_ERR(sleb)) return PTR_ERR(sleb); nodes_cnt = sleb->nodes_cnt; @@ -48,7 +49,7 @@ static int scan_for_master(struct ubifs_info *c) snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node, list); if (snod->type != UBIFS_MST_NODE) - goto out; + goto out_dump; memcpy(c->mst_node, snod->node, snod->len); offs = snod->offs; } @@ -56,7 +57,7 @@ static int scan_for_master(struct ubifs_info *c) lnum += 1; - sleb = ubifs_scan(c, lnum, 0, c->sbuf); + sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1); if (IS_ERR(sleb)) return PTR_ERR(sleb); if (sleb->nodes_cnt != nodes_cnt) @@ -65,7 +66,7 @@ static int scan_for_master(struct ubifs_info *c) goto out; snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node, list); if (snod->type != UBIFS_MST_NODE) - goto out; + goto out_dump; if (snod->offs != offs) goto out; if (memcmp((void *)c->mst_node + UBIFS_CH_SZ, @@ -78,6 +79,12 @@ static int scan_for_master(struct ubifs_info *c) out: ubifs_scan_destroy(sleb); + return -EUCLEAN; + +out_dump: + ubifs_err("unexpected node type %d master LEB %d:%d", + snod->type, lnum, snod->offs); + ubifs_scan_destroy(sleb); return -EINVAL; } @@ -256,7 +263,8 @@ int ubifs_read_master(struct ubifs_info *c) err = scan_for_master(c); if (err) { - err = ubifs_recover_master_node(c); + if (err == -EUCLEAN) + err = ubifs_recover_master_node(c); if (err) /* * Note, we do not free 'c->mst_node' here because the diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c index 152a7b34a141..82009c74b6a3 100644 --- a/fs/ubifs/orphan.c +++ b/fs/ubifs/orphan.c @@ -670,9 +670,10 @@ static int kill_orphans(struct ubifs_info *c) struct ubifs_scan_leb *sleb; dbg_rcvry("LEB %d", lnum); - sleb = ubifs_scan(c, lnum, 0, c->sbuf); + sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1); if (IS_ERR(sleb)) { - sleb = ubifs_recover_leb(c, lnum, 0, c->sbuf, 0); + if (PTR_ERR(sleb) == -EUCLEAN) + sleb = ubifs_recover_leb(c, lnum, 0, c->sbuf, 0); if (IS_ERR(sleb)) { err = PTR_ERR(sleb); break; @@ -899,7 +900,7 @@ static int dbg_scan_orphans(struct ubifs_info *c, struct check_info *ci) for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) { struct ubifs_scan_leb *sleb; - sleb = ubifs_scan(c, lnum, 0, c->dbg->buf); + sleb = ubifs_scan(c, lnum, 0, c->dbg->buf, 0); if (IS_ERR(sleb)) { err = PTR_ERR(sleb); break; diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index e5f6cf8a1155..f94ddf7efba0 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -286,7 +286,7 @@ int ubifs_recover_master_node(struct ubifs_info *c) mst = mst2; } - dbg_rcvry("recovered master node from LEB %d", + ubifs_msg("recovered master node from LEB %d", (mst == mst1 ? UBIFS_MST_LNUM : UBIFS_MST_LNUM + 1)); memcpy(c->mst_node, mst, UBIFS_MST_NODE_SZ); @@ -790,7 +790,7 @@ struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum, * We can only recover at the end of the log, so check that the * next log LEB is empty or out of date. */ - sleb = ubifs_scan(c, next_lnum, 0, sbuf); + sleb = ubifs_scan(c, next_lnum, 0, sbuf, 0); if (IS_ERR(sleb)) return sleb; if (sleb->nodes_cnt) { diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c index 2970500f32df..5c2d6d759a3e 100644 --- a/fs/ubifs/replay.c +++ b/fs/ubifs/replay.c @@ -506,7 +506,7 @@ static int replay_bud(struct ubifs_info *c, int lnum, int offs, int jhead, if (c->need_recovery) sleb = ubifs_recover_leb(c, lnum, offs, c->sbuf, jhead != GCHD); else - sleb = ubifs_scan(c, lnum, offs, c->sbuf); + sleb = ubifs_scan(c, lnum, offs, c->sbuf, 0); if (IS_ERR(sleb)) return PTR_ERR(sleb); @@ -836,8 +836,8 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf) const struct ubifs_cs_node *node; dbg_mnt("replay log LEB %d:%d", lnum, offs); - sleb = ubifs_scan(c, lnum, offs, sbuf); - if (IS_ERR(sleb) ) { + sleb = ubifs_scan(c, lnum, offs, sbuf, c->need_recovery); + if (IS_ERR(sleb)) { if (PTR_ERR(sleb) != -EUCLEAN || !c->need_recovery) return PTR_ERR(sleb); sleb = ubifs_recover_log_leb(c, lnum, offs, sbuf); diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c index 892ebfee4fe5..96c525384191 100644 --- a/fs/ubifs/scan.c +++ b/fs/ubifs/scan.c @@ -108,10 +108,9 @@ int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum, /* Make the node pads to 8-byte boundary */ if ((node_len + pad_len) & 7) { - if (!quiet) { + if (!quiet) dbg_err("bad padding length %d - %d", offs, offs + node_len + pad_len); - } return SCANNED_A_BAD_PAD_NODE; } @@ -253,15 +252,19 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs, * @c: UBIFS file-system description object * @lnum: logical eraseblock number * @offs: offset to start at (usually zero) - * @sbuf: scan buffer (must be c->leb_size) + * @sbuf: scan buffer (must be of @c->leb_size bytes in size) + * @quiet: print no messages * * This function scans LEB number @lnum and returns complete information about * its contents. Returns the scaned information in case of success and, * %-EUCLEAN if the LEB neads recovery, and other negative error codes in case * of failure. + * + * If @quiet is non-zero, this function does not print large and scary + * error messages and flash dumps in case of errors. */ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, - int offs, void *sbuf) + int offs, void *sbuf, int quiet) { void *buf = sbuf + offs; int err, len = c->leb_size - offs; @@ -280,7 +283,7 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, cond_resched(); - ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 0); + ret = ubifs_scan_a_node(c, buf, len, lnum, offs, quiet); if (ret > 0) { /* Padding bytes or a valid padding node */ offs += ret; @@ -320,7 +323,9 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, } if (offs % c->min_io_size) { - ubifs_err("empty space starts at non-aligned offset %d", offs); + if (!quiet) + ubifs_err("empty space starts at non-aligned offset %d", + offs); goto corrupted;; } @@ -331,18 +336,25 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, break; for (; len; offs++, buf++, len--) if (*(uint8_t *)buf != 0xff) { - ubifs_err("corrupt empty space at LEB %d:%d", - lnum, offs); + if (!quiet) + ubifs_err("corrupt empty space at LEB %d:%d", + lnum, offs); goto corrupted; } return sleb; corrupted: - ubifs_scanned_corruption(c, lnum, offs, buf); + if (!quiet) { + ubifs_scanned_corruption(c, lnum, offs, buf); + ubifs_err("LEB %d scanning failed", lnum); + } err = -EUCLEAN; + ubifs_scan_destroy(sleb); + return ERR_PTR(err); + error: - ubifs_err("LEB %d scanning failed", lnum); + ubifs_err("LEB %d scanning failed, error %d", lnum, err); ubifs_scan_destroy(sleb); return ERR_PTR(err); } diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index c4af069df1ad..333e181ee987 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -36,7 +36,6 @@ #include <linux/mount.h> #include <linux/math64.h> #include <linux/writeback.h> -#include <linux/smp_lock.h> #include "ubifs.h" /* @@ -318,6 +317,8 @@ static int ubifs_write_inode(struct inode *inode, int wait) if (err) ubifs_err("can't write inode %lu, error %d", inode->i_ino, err); + else + err = dbg_check_inode_size(c, inode, ui->ui_size); } ui->dirty = 0; @@ -448,17 +449,6 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) return 0; /* - * VFS calls '->sync_fs()' before synchronizing all dirty inodes and - * pages, so synchronize them first, then commit the journal. Strictly - * speaking, it is not necessary to commit the journal here, - * synchronizing write-buffers would be enough. But committing makes - * UBIFS free space predictions much more accurate, so we want to let - * the user be able to get more accurate results of 'statfs()' after - * they synchronize the file system. - */ - sync_inodes_sb(sb); - - /* * Synchronize write buffers, because 'ubifs_run_commit()' does not * do this if it waits for an already running commit. */ @@ -468,6 +458,13 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) return err; } + /* + * Strictly speaking, it is not necessary to commit the journal here, + * synchronizing write-buffers would be enough. But committing makes + * UBIFS free space predictions much more accurate, so we want to let + * the user be able to get more accurate results of 'statfs()' after + * they synchronize the file system. + */ err = ubifs_run_commit(c); if (err) return err; @@ -1720,8 +1717,6 @@ static void ubifs_put_super(struct super_block *sb) ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num, c->vi.vol_id); - lock_kernel(); - /* * The following asserts are only valid if there has not been a failure * of the media. For example, there will be dirty inodes if we failed @@ -1786,8 +1781,6 @@ static void ubifs_put_super(struct super_block *sb) ubi_close_volume(c->ubi); mutex_unlock(&c->umount_mutex); kfree(c); - - unlock_kernel(); } static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) @@ -1803,22 +1796,17 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) return err; } - lock_kernel(); if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { if (c->ro_media) { ubifs_msg("cannot re-mount due to prior errors"); - unlock_kernel(); return -EROFS; } err = ubifs_remount_rw(c); - if (err) { - unlock_kernel(); + if (err) return err; - } } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) { if (c->ro_media) { ubifs_msg("cannot re-mount due to prior errors"); - unlock_kernel(); return -EROFS; } ubifs_remount_ro(c); @@ -1833,7 +1821,6 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) } ubifs_assert(c->lst.taken_empty_lebs > 0); - unlock_kernel(); return 0; } diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index f249f7b0d656..e5b1a7d00fa0 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -1159,8 +1159,8 @@ static struct ubifs_znode *dirty_cow_bottom_up(struct ubifs_info *c, * o exact match, i.e. the found zero-level znode contains key @key, then %1 * is returned and slot number of the matched branch is stored in @n; * o not exact match, which means that zero-level znode does not contain - * @key, then %0 is returned and slot number of the closed branch is stored - * in @n; + * @key, then %0 is returned and slot number of the closest branch is stored + * in @n; * o @key is so small that it is even less than the lowest key of the * leftmost zero-level node, then %0 is returned and %0 is stored in @n. * @@ -1433,7 +1433,7 @@ static int maybe_leb_gced(struct ubifs_info *c, int lnum, int gc_seq1) * @lnum: LEB number is returned here * @offs: offset is returned here * - * This function look up and reads node with key @key. The caller has to make + * This function looks up and reads node with key @key. The caller has to make * sure the @node buffer is large enough to fit the node. Returns zero in case * of success, %-ENOENT if the node was not found, and a negative error code in * case of failure. The node location can be returned in @lnum and @offs. @@ -3268,3 +3268,73 @@ out_unlock: mutex_unlock(&c->tnc_mutex); return err; } + +#ifdef CONFIG_UBIFS_FS_DEBUG + +/** + * dbg_check_inode_size - check if inode size is correct. + * @c: UBIFS file-system description object + * @inum: inode number + * @size: inode size + * + * This function makes sure that the inode size (@size) is correct and it does + * not have any pages beyond @size. Returns zero if the inode is OK, %-EINVAL + * if it has a data page beyond @size, and other negative error code in case of + * other errors. + */ +int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode, + loff_t size) +{ + int err, n; + union ubifs_key from_key, to_key, *key; + struct ubifs_znode *znode; + unsigned int block; + + if (!S_ISREG(inode->i_mode)) + return 0; + if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) + return 0; + + block = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; + data_key_init(c, &from_key, inode->i_ino, block); + highest_data_key(c, &to_key, inode->i_ino); + + mutex_lock(&c->tnc_mutex); + err = ubifs_lookup_level0(c, &from_key, &znode, &n); + if (err < 0) + goto out_unlock; + + if (err) { + err = -EINVAL; + key = &from_key; + goto out_dump; + } + + err = tnc_next(c, &znode, &n); + if (err == -ENOENT) { + err = 0; + goto out_unlock; + } + if (err < 0) + goto out_unlock; + + ubifs_assert(err == 0); + key = &znode->zbranch[n].key; + if (!key_in_range(c, key, &from_key, &to_key)) + goto out_unlock; + +out_dump: + block = key_block(c, key); + ubifs_err("inode %lu has size %lld, but there are data at offset %lld " + "(data key %s)", (unsigned long)inode->i_ino, size, + ((loff_t)block) << UBIFS_BLOCK_SHIFT, DBGKEY(key)); + dbg_dump_inode(c, inode); + dbg_dump_stack(); + err = -EINVAL; + +out_unlock: + mutex_unlock(&c->tnc_mutex); + return err; +} + +#endif /* CONFIG_UBIFS_FS_DEBUG */ diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c index fde8d127c768..53288e5d604e 100644 --- a/fs/ubifs/tnc_commit.c +++ b/fs/ubifs/tnc_commit.c @@ -245,7 +245,7 @@ static int layout_leb_in_gaps(struct ubifs_info *c, int *p) * it is more comprehensive and less efficient than is needed for this * purpose. */ - sleb = ubifs_scan(c, lnum, 0, c->ileb_buf); + sleb = ubifs_scan(c, lnum, 0, c->ileb_buf, 0); c->ileb_len = 0; if (IS_ERR(sleb)) return PTR_ERR(sleb); diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h index 3eee07e0c495..191ca7863fe7 100644 --- a/fs/ubifs/ubifs-media.h +++ b/fs/ubifs/ubifs-media.h @@ -135,6 +135,13 @@ /* The key is always at the same position in all keyed nodes */ #define UBIFS_KEY_OFFSET offsetof(struct ubifs_ino_node, key) +/* Garbage collector journal head number */ +#define UBIFS_GC_HEAD 0 +/* Base journal head number */ +#define UBIFS_BASE_HEAD 1 +/* Data journal head number */ +#define UBIFS_DATA_HEAD 2 + /* * LEB Properties Tree node types. * diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index a29349094422..b2d976366a46 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -105,12 +105,10 @@ /* Number of non-data journal heads */ #define NONDATA_JHEADS_CNT 2 -/* Garbage collector head */ -#define GCHD 0 -/* Base journal head number */ -#define BASEHD 1 -/* First "general purpose" journal head */ -#define DATAHD 2 +/* Shorter names for journal head numbers for internal usage */ +#define GCHD UBIFS_GC_HEAD +#define BASEHD UBIFS_BASE_HEAD +#define DATAHD UBIFS_DATA_HEAD /* 'No change' value for 'ubifs_change_lp()' */ #define LPROPS_NC 0x80000001 @@ -1451,7 +1449,7 @@ int ubifs_sync_wbufs_by_inode(struct ubifs_info *c, struct inode *inode); /* scan.c */ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum, - int offs, void *sbuf); + int offs, void *sbuf, int quiet); void ubifs_scan_destroy(struct ubifs_scan_leb *sleb); int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum, int offs, int quiet); @@ -1676,6 +1674,7 @@ const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c); const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c); const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c); const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c); +int ubifs_calc_dark(const struct ubifs_info *c, int spc); /* file.c */ int ubifs_fsync(struct file *file, struct dentry *dentry, int datasync); diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c index adafcf556531..195830f47569 100644 --- a/fs/ubifs/xattr.c +++ b/fs/ubifs/xattr.c @@ -78,9 +78,9 @@ enum { SECURITY_XATTR, }; -static struct inode_operations none_inode_operations; -static struct address_space_operations none_address_operations; -static struct file_operations none_file_operations; +static const struct inode_operations none_inode_operations; +static const struct address_space_operations none_address_operations; +static const struct file_operations none_file_operations; /** * create_xattr - create an extended attribute. diff --git a/fs/xfs/linux-2.6/xfs_quotaops.c b/fs/xfs/linux-2.6/xfs_quotaops.c index cb6e2cca214f..9e41f91aa269 100644 --- a/fs/xfs/linux-2.6/xfs_quotaops.c +++ b/fs/xfs/linux-2.6/xfs_quotaops.c @@ -150,7 +150,7 @@ xfs_fs_set_xquota( return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq); } -struct quotactl_ops xfs_quotactl_operations = { +const struct quotactl_ops xfs_quotactl_operations = { .quota_sync = xfs_fs_quota_sync, .get_xstate = xfs_fs_get_xstate, .set_xstate = xfs_fs_set_xstate, diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 5d7c60ac77b4..bdd41c8c342f 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -67,7 +67,7 @@ #include <linux/freezer.h> #include <linux/parser.h> -static struct super_operations xfs_super_operations; +static const struct super_operations xfs_super_operations; static kmem_zone_t *xfs_ioend_zone; mempool_t *xfs_ioend_pool; @@ -1536,7 +1536,7 @@ xfs_fs_get_sb( mnt); } -static struct super_operations xfs_super_operations = { +static const struct super_operations xfs_super_operations = { .alloc_inode = xfs_fs_alloc_inode, .destroy_inode = xfs_fs_destroy_inode, .write_inode = xfs_fs_write_inode, diff --git a/fs/xfs/linux-2.6/xfs_super.h b/fs/xfs/linux-2.6/xfs_super.h index 5a2ea3a21781..18175ebd58ed 100644 --- a/fs/xfs/linux-2.6/xfs_super.h +++ b/fs/xfs/linux-2.6/xfs_super.h @@ -93,7 +93,7 @@ extern void xfs_blkdev_issue_flush(struct xfs_buftarg *); extern const struct export_operations xfs_export_operations; extern struct xattr_handler *xfs_xattr_handlers[]; -extern struct quotactl_ops xfs_quotactl_operations; +extern const struct quotactl_ops xfs_quotactl_operations; #define XFS_M(sb) ((struct xfs_mount *)((sb)->s_fs_info)) |
