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Merge branch 'master' into for-next

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This commit is contained in:
Jiri Kosina
2010-06-16 18:08:13 +02:00
parent fd0961ff67 7e27d6e778
commit f1bbbb6912
3859 changed files with 293553 additions and 106001 deletions
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5
fs/ecryptfs/ecryptfs_kernel.h
View File

@ -731,15 +731,14 @@ int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
struct page *page_for_lower,
size_t offset_in_page, size_t size);
int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
size_t size);
int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
struct inode *ecryptfs_inode);
int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
pgoff_t page_index,
size_t offset_in_page, size_t size,
struct inode *ecryptfs_inode);
struct page *ecryptfs_get_locked_page(struct file *file, loff_t index);
struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid,
struct user_namespace *user_ns);

6
fs/ecryptfs/file.c
View File

@ -274,11 +274,9 @@ static int ecryptfs_release(struct inode *inode, struct file *file)
}
static int
ecryptfs_fsync(struct file *file, struct dentry *dentry, int datasync)
ecryptfs_fsync(struct file *file, int datasync)
{
return vfs_fsync(ecryptfs_file_to_lower(file),
ecryptfs_dentry_to_lower(dentry),
datasync);
return vfs_fsync(ecryptfs_file_to_lower(file), datasync);
}
static int ecryptfs_fasync(int fd, struct file *file, int flag)

52
fs/ecryptfs/inode.c
View File

@ -142,19 +142,10 @@ out:
static int grow_file(struct dentry *ecryptfs_dentry)
{
struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode;
struct file fake_file;
struct ecryptfs_file_info tmp_file_info;
char zero_virt[] = { 0x00 };
int rc = 0;
memset(&fake_file, 0, sizeof(fake_file));
fake_file.f_path.dentry = ecryptfs_dentry;
memset(&tmp_file_info, 0, sizeof(tmp_file_info));
ecryptfs_set_file_private(&fake_file, &tmp_file_info);
ecryptfs_set_file_lower(
&fake_file,
ecryptfs_inode_to_private(ecryptfs_inode)->lower_file);
rc = ecryptfs_write(&fake_file, zero_virt, 0, 1);
rc = ecryptfs_write(ecryptfs_inode, zero_virt, 0, 1);
i_size_write(ecryptfs_inode, 0);
rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode);
ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |=
@ -784,8 +775,6 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
{
int rc = 0;
struct inode *inode = dentry->d_inode;
struct dentry *lower_dentry;
struct file fake_ecryptfs_file;
struct ecryptfs_crypt_stat *crypt_stat;
loff_t i_size = i_size_read(inode);
loff_t lower_size_before_truncate;
@ -796,23 +785,6 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
goto out;
}
crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
/* Set up a fake ecryptfs file, this is used to interface with
* the file in the underlying filesystem so that the
* truncation has an effect there as well. */
memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file));
fake_ecryptfs_file.f_path.dentry = dentry;
/* Released at out_free: label */
ecryptfs_set_file_private(&fake_ecryptfs_file,
kmem_cache_alloc(ecryptfs_file_info_cache,
GFP_KERNEL));
if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) {
rc = -ENOMEM;
goto out;
}
lower_dentry = ecryptfs_dentry_to_lower(dentry);
ecryptfs_set_file_lower(
&fake_ecryptfs_file,
ecryptfs_inode_to_private(dentry->d_inode)->lower_file);
/* Switch on growing or shrinking file */
if (ia->ia_size > i_size) {
char zero[] = { 0x00 };
@ -822,7 +794,7 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
* this triggers code that will fill in 0's throughout
* the intermediate portion of the previous end of the
* file and the new and of the file */
rc = ecryptfs_write(&fake_ecryptfs_file, zero,
rc = ecryptfs_write(inode, zero,
(ia->ia_size - 1), 1);
} else { /* ia->ia_size < i_size_read(inode) */
/* We're chopping off all the pages down to the page
@ -833,12 +805,12 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
- (ia->ia_size & ~PAGE_CACHE_MASK));
if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
rc = vmtruncate(inode, ia->ia_size);
rc = simple_setsize(inode, ia->ia_size);
if (rc)
goto out_free;
goto out;
lower_ia->ia_size = ia->ia_size;
lower_ia->ia_valid |= ATTR_SIZE;
goto out_free;
goto out;
}
if (num_zeros) {
char *zeros_virt;
@ -846,25 +818,25 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
if (!zeros_virt) {
rc = -ENOMEM;
goto out_free;
goto out;
}
rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt,
rc = ecryptfs_write(inode, zeros_virt,
ia->ia_size, num_zeros);
kfree(zeros_virt);
if (rc) {
printk(KERN_ERR "Error attempting to zero out "
"the remainder of the end page on "
"reducing truncate; rc = [%d]\n", rc);
goto out_free;
goto out;
}
}
vmtruncate(inode, ia->ia_size);
simple_setsize(inode, ia->ia_size);
rc = ecryptfs_write_inode_size_to_metadata(inode);
if (rc) {
printk(KERN_ERR "Problem with "
"ecryptfs_write_inode_size_to_metadata; "
"rc = [%d]\n", rc);
goto out_free;
goto out;
}
/* We are reducing the size of the ecryptfs file, and need to
* know if we need to reduce the size of the lower file. */
@ -878,10 +850,6 @@ static int truncate_upper(struct dentry *dentry, struct iattr *ia,
} else
lower_ia->ia_valid &= ~ATTR_SIZE;
}
out_free:
if (ecryptfs_file_to_private(&fake_ecryptfs_file))
kmem_cache_free(ecryptfs_file_info_cache,
ecryptfs_file_to_private(&fake_ecryptfs_file));
out:
return rc;
}

166
fs/ecryptfs/main.c
View File

@ -281,7 +281,7 @@ static void ecryptfs_init_mount_crypt_stat(
*
* Returns zero on success; non-zero on error
*/
static int ecryptfs_parse_options(struct super_block *sb, char *options)
static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options)
{
char *p;
int rc = 0;
@ -293,7 +293,7 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
int fn_cipher_key_bytes;
int fn_cipher_key_bytes_set = 0;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
&ecryptfs_superblock_to_private(sb)->mount_crypt_stat;
&sbi->mount_crypt_stat;
substring_t args[MAX_OPT_ARGS];
int token;
char *sig_src;
@ -483,68 +483,7 @@ out:
}
struct kmem_cache *ecryptfs_sb_info_cache;
/**
* ecryptfs_fill_super
* @sb: The ecryptfs super block
* @raw_data: The options passed to mount
* @silent: Not used but required by function prototype
*
* Sets up what we can of the sb, rest is done in ecryptfs_read_super
*
* Returns zero on success; non-zero otherwise
*/
static int
ecryptfs_fill_super(struct super_block *sb, void *raw_data, int silent)
{
struct ecryptfs_sb_info *esi;
int rc = 0;
/* Released in ecryptfs_put_super() */
ecryptfs_set_superblock_private(sb,
kmem_cache_zalloc(ecryptfs_sb_info_cache,
GFP_KERNEL));
esi = ecryptfs_superblock_to_private(sb);
if (!esi) {
ecryptfs_printk(KERN_WARNING, "Out of memory\n");
rc = -ENOMEM;
goto out;
}
rc = bdi_setup_and_register(&esi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
if (rc)
goto out;
sb->s_bdi = &esi->bdi;
sb->s_op = &ecryptfs_sops;
/* Released through deactivate_super(sb) from get_sb_nodev */
sb->s_root = d_alloc(NULL, &(const struct qstr) {
.hash = 0,.name = "/",.len = 1});
if (!sb->s_root) {
ecryptfs_printk(KERN_ERR, "d_alloc failed\n");
rc = -ENOMEM;
goto out;
}
sb->s_root->d_op = &ecryptfs_dops;
sb->s_root->d_sb = sb;
sb->s_root->d_parent = sb->s_root;
/* Released in d_release when dput(sb->s_root) is called */
/* through deactivate_super(sb) from get_sb_nodev() */
ecryptfs_set_dentry_private(sb->s_root,
kmem_cache_zalloc(ecryptfs_dentry_info_cache,
GFP_KERNEL));
if (!ecryptfs_dentry_to_private(sb->s_root)) {
ecryptfs_printk(KERN_ERR,
"dentry_info_cache alloc failed\n");
rc = -ENOMEM;
goto out;
}
rc = 0;
out:
/* Should be able to rely on deactivate_super called from
* get_sb_nodev */
return rc;
}
static struct file_system_type ecryptfs_fs_type;
/**
* ecryptfs_read_super
@ -565,6 +504,13 @@ static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
ecryptfs_printk(KERN_WARNING, "path_lookup() failed\n");
goto out;
}
if (path.dentry->d_sb->s_type == &ecryptfs_fs_type) {
rc = -EINVAL;
printk(KERN_ERR "Mount on filesystem of type "
"eCryptfs explicitly disallowed due to "
"known incompatibilities\n");
goto out_free;
}
ecryptfs_set_superblock_lower(sb, path.dentry->d_sb);
sb->s_maxbytes = path.dentry->d_sb->s_maxbytes;
sb->s_blocksize = path.dentry->d_sb->s_blocksize;
@ -588,11 +534,8 @@ out:
* @dev_name: The path to mount over
* @raw_data: The options passed into the kernel
*
* The whole ecryptfs_get_sb process is broken into 4 functions:
* The whole ecryptfs_get_sb process is broken into 3 functions:
* ecryptfs_parse_options(): handle options passed to ecryptfs, if any
* ecryptfs_fill_super(): used by get_sb_nodev, fills out the super_block
* with as much information as it can before needing
* the lower filesystem.
* ecryptfs_read_super(): this accesses the lower filesystem and uses
* ecryptfs_interpose to perform most of the linking
* ecryptfs_interpose(): links the lower filesystem into ecryptfs (inode.c)
@ -601,30 +544,78 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data,
struct vfsmount *mnt)
{
struct super_block *s;
struct ecryptfs_sb_info *sbi;
struct ecryptfs_dentry_info *root_info;
const char *err = "Getting sb failed";
int rc;
struct super_block *sb;
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
sbi = kmem_cache_zalloc(ecryptfs_sb_info_cache, GFP_KERNEL);
if (!sbi) {
rc = -ENOMEM;
goto out;
}
sb = mnt->mnt_sb;
rc = ecryptfs_parse_options(sb, raw_data);
rc = ecryptfs_parse_options(sbi, raw_data);
if (rc) {
printk(KERN_ERR "Error parsing options; rc = [%d]\n", rc);
goto out_abort;
err = "Error parsing options";
goto out;
}
rc = ecryptfs_read_super(sb, dev_name);
s = sget(fs_type, NULL, set_anon_super, NULL);
if (IS_ERR(s)) {
rc = PTR_ERR(s);
goto out;
}
s->s_flags = flags;
rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
if (rc) {
printk(KERN_ERR "Reading sb failed; rc = [%d]\n", rc);
goto out_abort;
deactivate_locked_super(s);
goto out;
}
goto out;
out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
ecryptfs_set_superblock_private(s, sbi);
s->s_bdi = &sbi->bdi;
/* ->kill_sb() will take care of sbi after that point */
sbi = NULL;
s->s_op = &ecryptfs_sops;
rc = -ENOMEM;
s->s_root = d_alloc(NULL, &(const struct qstr) {
.hash = 0,.name = "/",.len = 1});
if (!s->s_root) {
deactivate_locked_super(s);
goto out;
}
s->s_root->d_op = &ecryptfs_dops;
s->s_root->d_sb = s;
s->s_root->d_parent = s->s_root;
root_info = kmem_cache_zalloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
if (!root_info) {
deactivate_locked_super(s);
goto out;
}
/* ->kill_sb() will take care of root_info */
ecryptfs_set_dentry_private(s->s_root, root_info);
s->s_flags |= MS_ACTIVE;
rc = ecryptfs_read_super(s, dev_name);
if (rc) {
deactivate_locked_super(s);
err = "Reading sb failed";
goto out;
}
simple_set_mnt(mnt, s);
return 0;
out:
if (sbi) {
ecryptfs_destroy_mount_crypt_stat(&sbi->mount_crypt_stat);
kmem_cache_free(ecryptfs_sb_info_cache, sbi);
}
printk(KERN_ERR "%s; rc = [%d]\n", err, rc);
return rc;
}
@ -633,11 +624,16 @@ out:
* @sb: The ecryptfs super block
*
* Used to bring the superblock down and free the private data.
* Private data is free'd in ecryptfs_put_super()
*/
static void ecryptfs_kill_block_super(struct super_block *sb)
{
generic_shutdown_super(sb);
struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb);
kill_anon_super(sb);
if (!sb_info)
return;
ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
bdi_destroy(&sb_info->bdi);
kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
}
static struct file_system_type ecryptfs_fs_type = {

19
fs/ecryptfs/mmap.c
View File

@ -44,17 +44,9 @@
* Returns locked and up-to-date page (if ok), with increased
* refcnt.
*/
struct page *ecryptfs_get_locked_page(struct file *file, loff_t index)
struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index)
{
struct dentry *dentry;
struct inode *inode;
struct address_space *mapping;
struct page *page;
dentry = file->f_path.dentry;
inode = dentry->d_inode;
mapping = inode->i_mapping;
page = read_mapping_page(mapping, index, (void *)file);
struct page *page = read_mapping_page(inode->i_mapping, index, NULL);
if (!IS_ERR(page))
lock_page(page);
return page;
@ -198,7 +190,7 @@ out:
static int ecryptfs_readpage(struct file *file, struct page *page)
{
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(file->f_path.dentry->d_inode)->crypt_stat;
&ecryptfs_inode_to_private(page->mapping->host)->crypt_stat;
int rc = 0;
if (!crypt_stat
@ -300,8 +292,7 @@ static int ecryptfs_write_begin(struct file *file,
if (!PageUptodate(page)) {
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(
file->f_path.dentry->d_inode)->crypt_stat;
&ecryptfs_inode_to_private(mapping->host)->crypt_stat;
if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)
|| (crypt_stat->flags & ECRYPTFS_NEW_FILE)) {
@ -487,7 +478,7 @@ static int ecryptfs_write_end(struct file *file,
unsigned to = from + copied;
struct inode *ecryptfs_inode = mapping->host;
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(file->f_path.dentry->d_inode)->crypt_stat;
&ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat;
int rc;
if (crypt_stat->flags & ECRYPTFS_NEW_FILE) {

13
fs/ecryptfs/read_write.c
View File

@ -93,7 +93,7 @@ int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
/**
* ecryptfs_write
* @ecryptfs_file: The eCryptfs file into which to write
* @ecryptfs_inode: The eCryptfs file into which to write
* @data: Virtual address where data to write is located
* @offset: Offset in the eCryptfs file at which to begin writing the
* data from @data
@ -109,12 +109,11 @@ int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
*
* Returns zero on success; non-zero otherwise
*/
int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
int ecryptfs_write(struct inode *ecryptfs_inode, char *data, loff_t offset,
size_t size)
{
struct page *ecryptfs_page;
struct ecryptfs_crypt_stat *crypt_stat;
struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode;
char *ecryptfs_page_virt;
loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode);
loff_t data_offset = 0;
@ -145,7 +144,7 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
if (num_bytes > total_remaining_zeros)
num_bytes = total_remaining_zeros;
}
ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_file,
ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_inode,
ecryptfs_page_idx);
if (IS_ERR(ecryptfs_page)) {
rc = PTR_ERR(ecryptfs_page);
@ -302,10 +301,10 @@ int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
int ecryptfs_read(char *data, loff_t offset, size_t size,
struct file *ecryptfs_file)
{
struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode;
struct page *ecryptfs_page;
char *ecryptfs_page_virt;
loff_t ecryptfs_file_size =
i_size_read(ecryptfs_file->f_dentry->d_inode);
loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode);
loff_t data_offset = 0;
loff_t pos;
int rc = 0;
@ -327,7 +326,7 @@ int ecryptfs_read(char *data, loff_t offset, size_t size,
if (num_bytes > total_remaining_bytes)
num_bytes = total_remaining_bytes;
ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_file,
ecryptfs_page = ecryptfs_get_locked_page(ecryptfs_inode,
ecryptfs_page_idx);
if (IS_ERR(ecryptfs_page)) {
rc = PTR_ERR(ecryptfs_page);

22
fs/ecryptfs/super.c
View File

@ -108,27 +108,6 @@ void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode)
inode->i_mapping->a_ops = &ecryptfs_aops;
}
/**
* ecryptfs_put_super
* @sb: Pointer to the ecryptfs super block
*
* Final actions when unmounting a file system.
* This will handle deallocation and release of our private data.
*/
static void ecryptfs_put_super(struct super_block *sb)
{
struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb);
lock_kernel();
ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
bdi_destroy(&sb_info->bdi);
kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
ecryptfs_set_superblock_private(sb, NULL);
unlock_kernel();
}
/**
* ecryptfs_statfs
* @sb: The ecryptfs super block
@ -203,7 +182,6 @@ const struct super_operations ecryptfs_sops = {
.alloc_inode = ecryptfs_alloc_inode,
.destroy_inode = ecryptfs_destroy_inode,
.drop_inode = generic_delete_inode,
.put_super = ecryptfs_put_super,
.statfs = ecryptfs_statfs,
.remount_fs = NULL,
.clear_inode = ecryptfs_clear_inode,