Revision 5ced1339612d1fa095459bd481f1d1f64f76f859 authored by Linus Lüssing on 15 February 2011, 13:19:20 UTC, committed by David S. Miller on 22 February 2011, 18:07:27 UTC
This commit adds the missing IPv6 multicast address flag defines to complement the already existing multicast address scope defines and to be able to check these flags nicely in the future. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent d41db9f
inode.c
/*
* linux/fs/hfsplus/inode.c
*
* Copyright (C) 2001
* Brad Boyer (flar@allandria.com)
* (C) 2003 Ardis Technologies <roman@ardistech.com>
*
* Inode handling routines
*/
#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/sched.h>
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
static int hfsplus_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page, hfsplus_get_block);
}
static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page, hfsplus_get_block, wbc);
}
static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfsplus_get_block,
&HFSPLUS_I(mapping->host)->phys_size);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping, block, hfsplus_get_block);
}
static int hfsplus_releasepage(struct page *page, gfp_t mask)
{
struct inode *inode = page->mapping->host;
struct super_block *sb = inode->i_sb;
struct hfs_btree *tree;
struct hfs_bnode *node;
u32 nidx;
int i, res = 1;
switch (inode->i_ino) {
case HFSPLUS_EXT_CNID:
tree = HFSPLUS_SB(sb)->ext_tree;
break;
case HFSPLUS_CAT_CNID:
tree = HFSPLUS_SB(sb)->cat_tree;
break;
case HFSPLUS_ATTR_CNID:
tree = HFSPLUS_SB(sb)->attr_tree;
break;
default:
BUG();
return 0;
}
if (!tree)
return 0;
if (tree->node_size >= PAGE_CACHE_SIZE) {
nidx = page->index >>
(tree->node_size_shift - PAGE_CACHE_SHIFT);
spin_lock(&tree->hash_lock);
node = hfs_bnode_findhash(tree, nidx);
if (!node)
;
else if (atomic_read(&node->refcnt))
res = 0;
if (res && node) {
hfs_bnode_unhash(node);
hfs_bnode_free(node);
}
spin_unlock(&tree->hash_lock);
} else {
nidx = page->index <<
(PAGE_CACHE_SHIFT - tree->node_size_shift);
i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
spin_lock(&tree->hash_lock);
do {
node = hfs_bnode_findhash(tree, nidx++);
if (!node)
continue;
if (atomic_read(&node->refcnt)) {
res = 0;
break;
}
hfs_bnode_unhash(node);
hfs_bnode_free(node);
} while (--i && nidx < tree->node_count);
spin_unlock(&tree->hash_lock);
}
return res ? try_to_free_buffers(page) : 0;
}
static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
ssize_t ret;
ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
offset, nr_segs, hfsplus_get_block, NULL);
/*
* In case of error extending write may have instantiated a few
* blocks outside i_size. Trim these off again.
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
vmtruncate(inode, isize);
}
return ret;
}
static int hfsplus_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
return mpage_writepages(mapping, wbc, hfsplus_get_block);
}
const struct address_space_operations hfsplus_btree_aops = {
.readpage = hfsplus_readpage,
.writepage = hfsplus_writepage,
.sync_page = block_sync_page,
.write_begin = hfsplus_write_begin,
.write_end = generic_write_end,
.bmap = hfsplus_bmap,
.releasepage = hfsplus_releasepage,
};
const struct address_space_operations hfsplus_aops = {
.readpage = hfsplus_readpage,
.writepage = hfsplus_writepage,
.sync_page = block_sync_page,
.write_begin = hfsplus_write_begin,
.write_end = generic_write_end,
.bmap = hfsplus_bmap,
.direct_IO = hfsplus_direct_IO,
.writepages = hfsplus_writepages,
};
const struct dentry_operations hfsplus_dentry_operations = {
.d_hash = hfsplus_hash_dentry,
.d_compare = hfsplus_compare_dentry,
};
static struct dentry *hfsplus_file_lookup(struct inode *dir,
struct dentry *dentry, struct nameidata *nd)
{
struct hfs_find_data fd;
struct super_block *sb = dir->i_sb;
struct inode *inode = NULL;
struct hfsplus_inode_info *hip;
int err;
if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
goto out;
inode = HFSPLUS_I(dir)->rsrc_inode;
if (inode)
goto out;
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
hip = HFSPLUS_I(inode);
inode->i_ino = dir->i_ino;
INIT_LIST_HEAD(&hip->open_dir_list);
mutex_init(&hip->extents_lock);
hip->extent_state = 0;
hip->flags = 0;
set_bit(HFSPLUS_I_RSRC, &hip->flags);
hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
err = hfsplus_find_cat(sb, dir->i_ino, &fd);
if (!err)
err = hfsplus_cat_read_inode(inode, &fd);
hfs_find_exit(&fd);
if (err) {
iput(inode);
return ERR_PTR(err);
}
hip->rsrc_inode = dir;
HFSPLUS_I(dir)->rsrc_inode = inode;
igrab(dir);
/*
* __mark_inode_dirty expects inodes to be hashed. Since we don't
* want resource fork inodes in the regular inode space, we make them
* appear hashed, but do not put on any lists. hlist_del()
* will work fine and require no locking.
*/
hlist_add_fake(&inode->i_hash);
mark_inode_dirty(inode);
out:
d_add(dentry, inode);
return NULL;
}
static void hfsplus_get_perms(struct inode *inode,
struct hfsplus_perm *perms, int dir)
{
struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
u16 mode;
mode = be16_to_cpu(perms->mode);
inode->i_uid = be32_to_cpu(perms->owner);
if (!inode->i_uid && !mode)
inode->i_uid = sbi->uid;
inode->i_gid = be32_to_cpu(perms->group);
if (!inode->i_gid && !mode)
inode->i_gid = sbi->gid;
if (dir) {
mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
mode |= S_IFDIR;
} else if (!mode)
mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
inode->i_mode = mode;
HFSPLUS_I(inode)->userflags = perms->userflags;
if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
inode->i_flags |= S_IMMUTABLE;
else
inode->i_flags &= ~S_IMMUTABLE;
if (perms->rootflags & HFSPLUS_FLG_APPEND)
inode->i_flags |= S_APPEND;
else
inode->i_flags &= ~S_APPEND;
}
static int hfsplus_file_open(struct inode *inode, struct file *file)
{
if (HFSPLUS_IS_RSRC(inode))
inode = HFSPLUS_I(inode)->rsrc_inode;
if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
return -EOVERFLOW;
atomic_inc(&HFSPLUS_I(inode)->opencnt);
return 0;
}
static int hfsplus_file_release(struct inode *inode, struct file *file)
{
struct super_block *sb = inode->i_sb;
if (HFSPLUS_IS_RSRC(inode))
inode = HFSPLUS_I(inode)->rsrc_inode;
if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
mutex_lock(&inode->i_mutex);
hfsplus_file_truncate(inode);
if (inode->i_flags & S_DEAD) {
hfsplus_delete_cat(inode->i_ino,
HFSPLUS_SB(sb)->hidden_dir, NULL);
hfsplus_delete_inode(inode);
}
mutex_unlock(&inode->i_mutex);
}
return 0;
}
static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
int error;
error = inode_change_ok(inode, attr);
if (error)
return error;
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
error = vmtruncate(inode, attr->ia_size);
if (error)
return error;
}
setattr_copy(inode, attr);
mark_inode_dirty(inode);
return 0;
}
int hfsplus_file_fsync(struct file *file, int datasync)
{
struct inode *inode = file->f_mapping->host;
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
int error = 0, error2;
/*
* Sync inode metadata into the catalog and extent trees.
*/
sync_inode_metadata(inode, 1);
/*
* And explicitly write out the btrees.
*/
if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
error2 =
filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
if (!error)
error = error2;
}
if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
if (!error)
error = error2;
}
if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
return error;
}
static const struct inode_operations hfsplus_file_inode_operations = {
.lookup = hfsplus_file_lookup,
.truncate = hfsplus_file_truncate,
.setattr = hfsplus_setattr,
.setxattr = hfsplus_setxattr,
.getxattr = hfsplus_getxattr,
.listxattr = hfsplus_listxattr,
};
static const struct file_operations hfsplus_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.splice_read = generic_file_splice_read,
.fsync = hfsplus_file_fsync,
.open = hfsplus_file_open,
.release = hfsplus_file_release,
.unlocked_ioctl = hfsplus_ioctl,
};
struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
{
struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
struct inode *inode = new_inode(sb);
struct hfsplus_inode_info *hip;
if (!inode)
return NULL;
inode->i_ino = sbi->next_cnid++;
inode->i_mode = mode;
inode->i_uid = current_fsuid();
inode->i_gid = current_fsgid();
inode->i_nlink = 1;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
hip = HFSPLUS_I(inode);
INIT_LIST_HEAD(&hip->open_dir_list);
mutex_init(&hip->extents_lock);
atomic_set(&hip->opencnt, 0);
hip->extent_state = 0;
hip->flags = 0;
memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
hip->alloc_blocks = 0;
hip->first_blocks = 0;
hip->cached_start = 0;
hip->cached_blocks = 0;
hip->phys_size = 0;
hip->fs_blocks = 0;
hip->rsrc_inode = NULL;
if (S_ISDIR(inode->i_mode)) {
inode->i_size = 2;
sbi->folder_count++;
inode->i_op = &hfsplus_dir_inode_operations;
inode->i_fop = &hfsplus_dir_operations;
} else if (S_ISREG(inode->i_mode)) {
sbi->file_count++;
inode->i_op = &hfsplus_file_inode_operations;
inode->i_fop = &hfsplus_file_operations;
inode->i_mapping->a_ops = &hfsplus_aops;
hip->clump_blocks = sbi->data_clump_blocks;
} else if (S_ISLNK(inode->i_mode)) {
sbi->file_count++;
inode->i_op = &page_symlink_inode_operations;
inode->i_mapping->a_ops = &hfsplus_aops;
hip->clump_blocks = 1;
} else
sbi->file_count++;
insert_inode_hash(inode);
mark_inode_dirty(inode);
sb->s_dirt = 1;
return inode;
}
void hfsplus_delete_inode(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
if (S_ISDIR(inode->i_mode)) {
HFSPLUS_SB(sb)->folder_count--;
sb->s_dirt = 1;
return;
}
HFSPLUS_SB(sb)->file_count--;
if (S_ISREG(inode->i_mode)) {
if (!inode->i_nlink) {
inode->i_size = 0;
hfsplus_file_truncate(inode);
}
} else if (S_ISLNK(inode->i_mode)) {
inode->i_size = 0;
hfsplus_file_truncate(inode);
}
sb->s_dirt = 1;
}
void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
{
struct super_block *sb = inode->i_sb;
struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
u32 count;
int i;
memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
for (count = 0, i = 0; i < 8; i++)
count += be32_to_cpu(fork->extents[i].block_count);
hip->first_blocks = count;
memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
hip->cached_start = 0;
hip->cached_blocks = 0;
hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
hip->fs_blocks =
(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
hip->clump_blocks =
be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
if (!hip->clump_blocks) {
hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
sbi->rsrc_clump_blocks :
sbi->data_clump_blocks;
}
}
void hfsplus_inode_write_fork(struct inode *inode,
struct hfsplus_fork_raw *fork)
{
memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
sizeof(hfsplus_extent_rec));
fork->total_size = cpu_to_be64(inode->i_size);
fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
}
int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
{
hfsplus_cat_entry entry;
int res = 0;
u16 type;
type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
HFSPLUS_I(inode)->linkid = 0;
if (type == HFSPLUS_FOLDER) {
struct hfsplus_cat_folder *folder = &entry.folder;
if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
/* panic? */;
hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
sizeof(struct hfsplus_cat_folder));
hfsplus_get_perms(inode, &folder->permissions, 1);
inode->i_nlink = 1;
inode->i_size = 2 + be32_to_cpu(folder->valence);
inode->i_atime = hfsp_mt2ut(folder->access_date);
inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
HFSPLUS_I(inode)->create_date = folder->create_date;
HFSPLUS_I(inode)->fs_blocks = 0;
inode->i_op = &hfsplus_dir_inode_operations;
inode->i_fop = &hfsplus_dir_operations;
} else if (type == HFSPLUS_FILE) {
struct hfsplus_cat_file *file = &entry.file;
if (fd->entrylength < sizeof(struct hfsplus_cat_file))
/* panic? */;
hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
sizeof(struct hfsplus_cat_file));
hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
&file->rsrc_fork : &file->data_fork);
hfsplus_get_perms(inode, &file->permissions, 0);
inode->i_nlink = 1;
if (S_ISREG(inode->i_mode)) {
if (file->permissions.dev)
inode->i_nlink =
be32_to_cpu(file->permissions.dev);
inode->i_op = &hfsplus_file_inode_operations;
inode->i_fop = &hfsplus_file_operations;
inode->i_mapping->a_ops = &hfsplus_aops;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &page_symlink_inode_operations;
inode->i_mapping->a_ops = &hfsplus_aops;
} else {
init_special_inode(inode, inode->i_mode,
be32_to_cpu(file->permissions.dev));
}
inode->i_atime = hfsp_mt2ut(file->access_date);
inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
HFSPLUS_I(inode)->create_date = file->create_date;
} else {
printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
res = -EIO;
}
return res;
}
int hfsplus_cat_write_inode(struct inode *inode)
{
struct inode *main_inode = inode;
struct hfs_find_data fd;
hfsplus_cat_entry entry;
if (HFSPLUS_IS_RSRC(inode))
main_inode = HFSPLUS_I(inode)->rsrc_inode;
if (!main_inode->i_nlink)
return 0;
if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
/* panic? */
return -EIO;
if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
/* panic? */
goto out;
if (S_ISDIR(main_inode->i_mode)) {
struct hfsplus_cat_folder *folder = &entry.folder;
if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
/* panic? */;
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_folder));
/* simple node checks? */
hfsplus_cat_set_perms(inode, &folder->permissions);
folder->access_date = hfsp_ut2mt(inode->i_atime);
folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
folder->valence = cpu_to_be32(inode->i_size - 2);
hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_folder));
} else if (HFSPLUS_IS_RSRC(inode)) {
struct hfsplus_cat_file *file = &entry.file;
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
hfsplus_inode_write_fork(inode, &file->rsrc_fork);
hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
} else {
struct hfsplus_cat_file *file = &entry.file;
if (fd.entrylength < sizeof(struct hfsplus_cat_file))
/* panic? */;
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
hfsplus_inode_write_fork(inode, &file->data_fork);
hfsplus_cat_set_perms(inode, &file->permissions);
if (HFSPLUS_FLG_IMMUTABLE &
(file->permissions.rootflags |
file->permissions.userflags))
file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
else
file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
file->access_date = hfsp_ut2mt(inode->i_atime);
file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
}
set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
out:
hfs_find_exit(&fd);
return 0;
}
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