/**
* inode.c - NTFS kernel inode handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2007 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/pagemap.h>
#include <linux/buffer_head.h>
-#include <linux/smp_lock.h>
-#include <linux/quotaops.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
#include <linux/mount.h>
+#include <linux/mutex.h>
+#include <linux/pagemap.h>
+#include <linux/quotaops.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
-#include "ntfs.h"
+#include "aops.h"
+#include "attrib.h"
+#include "bitmap.h"
#include "dir.h"
+#include "debug.h"
#include "inode.h"
#include "attrib.h"
+#include "lcnalloc.h"
+#include "malloc.h"
+#include "mft.h"
#include "time.h"
+#include "ntfs.h"
/**
* ntfs_test_inode - compare two (possibly fake) inodes for equality
* If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
* In that case, @na->name and @na->name_len should be set to NULL and 0,
* respectively. Although that is not strictly necessary as
- * ntfs_read_inode_locked() will fill them in later.
+ * ntfs_read_locked_inode() will fill them in later.
*
* Return 0 on success and -errno on error.
*
ni->name_len = na->name_len;
/* If initializing a normal inode, we are done. */
- if (likely(na->type == AT_UNUSED))
+ if (likely(na->type == AT_UNUSED)) {
+ BUG_ON(na->name);
+ BUG_ON(na->name_len);
return 0;
+ }
/* It is a fake inode. */
NInoSetAttr(ni);
* thus the fraction of named attributes with name != I30 is actually
* absolutely tiny.
*/
- if (na->name && na->name_len && na->name != I30) {
+ if (na->name_len && na->name != I30) {
unsigned int i;
+ BUG_ON(!na->name);
i = na->name_len * sizeof(ntfschar);
- ni->name = (ntfschar*)kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
+ ni->name = kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
if (!ni->name)
return -ENOMEM;
memcpy(ni->name, na->name, i);
- ni->name[i] = cpu_to_le16('\0');
+ ni->name[i] = 0;
}
return 0;
}
typedef int (*set_t)(struct inode *, void *);
static int ntfs_read_locked_inode(struct inode *vi);
static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
+static int ntfs_read_locked_index_inode(struct inode *base_vi,
+ struct inode *vi);
/**
* ntfs_iget - obtain a struct inode corresponding to a specific normal inode
struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no)
{
struct inode *vi;
- ntfs_attr na;
int err;
+ ntfs_attr na;
na.mft_no = mft_no;
na.type = AT_UNUSED;
vi = iget5_locked(sb, mft_no, (test_t)ntfs_test_inode,
(set_t)ntfs_init_locked_inode, &na);
- if (!vi)
+ if (unlikely(!vi))
return ERR_PTR(-ENOMEM);
err = 0;
* There is no point in keeping bad inodes around if the failure was
* due to ENOMEM. We want to be able to retry again later.
*/
- if (err == -ENOMEM) {
+ if (unlikely(err == -ENOMEM)) {
iput(vi);
vi = ERR_PTR(err);
}
* initialized, and finally ntfs_read_locked_attr_inode() is called to read the
* attribute and fill in the inode structure.
*
+ * Note, for index allocation attributes, you need to use ntfs_index_iget()
+ * instead of ntfs_attr_iget() as working with indices is a lot more complex.
+ *
* Return the struct inode of the attribute inode on success. Check the return
* value with IS_ERR() and if true, the function failed and the error code is
* obtained from PTR_ERR().
*/
-struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPES type,
+struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type,
ntfschar *name, u32 name_len)
{
struct inode *vi;
- ntfs_attr na;
int err;
+ ntfs_attr na;
+
+ /* Make sure no one calls ntfs_attr_iget() for indices. */
+ BUG_ON(type == AT_INDEX_ALLOCATION);
na.mft_no = base_vi->i_ino;
na.type = type;
vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode,
(set_t)ntfs_init_locked_inode, &na);
- if (!vi)
+ if (unlikely(!vi))
return ERR_PTR(-ENOMEM);
err = 0;
* simplifies things in that we never need to check for bad attribute
* inodes elsewhere.
*/
- if (err) {
+ if (unlikely(err)) {
+ iput(vi);
+ vi = ERR_PTR(err);
+ }
+ return vi;
+}
+
+/**
+ * ntfs_index_iget - obtain a struct inode corresponding to an index
+ * @base_vi: vfs base inode containing the index related attributes
+ * @name: Unicode name of the index
+ * @name_len: length of @name in Unicode characters
+ *
+ * Obtain the (fake) struct inode corresponding to the index specified by @name
+ * and @name_len, which is present in the base mft record specified by the vfs
+ * inode @base_vi.
+ *
+ * If the index inode is in the cache, it is just returned with an increased
+ * reference count. Otherwise, a new struct inode is allocated and
+ * initialized, and finally ntfs_read_locked_index_inode() is called to read
+ * the index related attributes and fill in the inode structure.
+ *
+ * Return the struct inode of the index inode on success. Check the return
+ * value with IS_ERR() and if true, the function failed and the error code is
+ * obtained from PTR_ERR().
+ */
+struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
+ u32 name_len)
+{
+ struct inode *vi;
+ int err;
+ ntfs_attr na;
+
+ na.mft_no = base_vi->i_ino;
+ na.type = AT_INDEX_ALLOCATION;
+ na.name = name;
+ na.name_len = name_len;
+
+ vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode,
+ (set_t)ntfs_init_locked_inode, &na);
+ if (unlikely(!vi))
+ return ERR_PTR(-ENOMEM);
+
+ err = 0;
+
+ /* If this is a freshly allocated inode, need to read it now. */
+ if (vi->i_state & I_NEW) {
+ err = ntfs_read_locked_index_inode(base_vi, vi);
+ unlock_new_inode(vi);
+ }
+ /*
+ * There is no point in keeping bad index inodes around. This also
+ * simplifies things in that we never need to check for bad index
+ * inodes elsewhere.
+ */
+ if (unlikely(err)) {
iput(vi);
vi = ERR_PTR(err);
}
ntfs_inode *ni;
ntfs_debug("Entering.");
- ni = (ntfs_inode *)kmem_cache_alloc(ntfs_big_inode_cache,
- SLAB_NOFS);
+ ni = kmem_cache_alloc(ntfs_big_inode_cache, GFP_NOFS);
if (likely(ni != NULL)) {
ni->state = 0;
return VFS_I(ni);
ntfs_inode *ni;
ntfs_debug("Entering.");
- ni = (ntfs_inode *)kmem_cache_alloc(ntfs_inode_cache, SLAB_NOFS);
+ ni = kmem_cache_alloc(ntfs_inode_cache, GFP_NOFS);
if (likely(ni != NULL)) {
ni->state = 0;
return ni;
return NULL;
}
-void ntfs_destroy_extent_inode(ntfs_inode *ni)
+static void ntfs_destroy_extent_inode(ntfs_inode *ni)
{
ntfs_debug("Entering.");
BUG_ON(ni->page);
kmem_cache_free(ntfs_inode_cache, ni);
}
+/*
+ * The attribute runlist lock has separate locking rules from the
+ * normal runlist lock, so split the two lock-classes:
+ */
+static struct lock_class_key attr_list_rl_lock_class;
+
/**
* __ntfs_init_inode - initialize ntfs specific part of an inode
* @sb: super block of mounted volume
*
* Return zero on success and -ENOMEM on error.
*/
-static void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
+void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
{
ntfs_debug("Entering.");
+ rwlock_init(&ni->size_lock);
ni->initialized_size = ni->allocated_size = 0;
ni->seq_no = 0;
atomic_set(&ni->count, 1);
ni->vol = NTFS_SB(sb);
- init_run_list(&ni->run_list);
- init_MUTEX(&ni->mrec_lock);
+ ntfs_init_runlist(&ni->runlist);
+ mutex_init(&ni->mrec_lock);
ni->page = NULL;
ni->page_ofs = 0;
ni->attr_list_size = 0;
ni->attr_list = NULL;
- init_run_list(&ni->attr_list_rl);
- ni->itype.index.bmp_ino = NULL;
+ ntfs_init_runlist(&ni->attr_list_rl);
+ lockdep_set_class(&ni->attr_list_rl.lock,
+ &attr_list_rl_lock_class);
ni->itype.index.block_size = 0;
ni->itype.index.vcn_size = 0;
+ ni->itype.index.collation_rule = 0;
ni->itype.index.block_size_bits = 0;
ni->itype.index.vcn_size_bits = 0;
- init_MUTEX(&ni->extent_lock);
+ mutex_init(&ni->extent_lock);
ni->nr_extents = 0;
ni->ext.base_ntfs_ino = NULL;
- return;
}
-static inline void ntfs_init_big_inode(struct inode *vi)
-{
- ntfs_inode *ni = NTFS_I(vi);
-
- ntfs_debug("Entering.");
- __ntfs_init_inode(vi->i_sb, ni);
- ni->mft_no = vi->i_ino;
- return;
-}
+/*
+ * Extent inodes get MFT-mapped in a nested way, while the base inode
+ * is still mapped. Teach this nesting to the lock validator by creating
+ * a separate class for nested inode's mrec_lock's:
+ */
+static struct lock_class_key extent_inode_mrec_lock_key;
inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
unsigned long mft_no)
ntfs_debug("Entering.");
if (likely(ni != NULL)) {
__ntfs_init_inode(sb, ni);
+ lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key);
ni->mft_no = mft_no;
ni->type = AT_UNUSED;
ni->name = NULL;
* Return values:
* 1: file is in $Extend directory
* 0: file is not in $Extend directory
- * -EIO: file is corrupt
+ * -errno: failed to determine if the file is in the $Extend directory
*/
-static int ntfs_is_extended_system_file(attr_search_context *ctx)
+static int ntfs_is_extended_system_file(ntfs_attr_search_ctx *ctx)
{
- int nr_links;
+ int nr_links, err;
/* Restart search. */
- reinit_attr_search_ctx(ctx);
+ ntfs_attr_reinit_search_ctx(ctx);
/* Get number of hard links. */
nr_links = le16_to_cpu(ctx->mrec->link_count);
/* Loop through all hard links. */
- while (lookup_attr(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0, ctx)) {
+ while (!(err = ntfs_attr_lookup(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0,
+ ctx))) {
FILE_NAME_ATTR *file_name_attr;
ATTR_RECORD *attr = ctx->attr;
u8 *p, *p2;
if (MREF_LE(file_name_attr->parent_directory) == FILE_Extend)
return 1; /* YES, it's an extended system file. */
}
- if (nr_links) {
+ if (unlikely(err != -ENOENT))
+ return err;
+ if (unlikely(nr_links)) {
ntfs_error(ctx->ntfs_ino->vol->sb, "Inode hard link count "
"doesn't match number of name attributes. You "
"should run chkdsk.");
*
* The only fields in @vi that we need to/can look at when the function is
* called are i_sb, pointing to the mounted device's super block, and i_ino,
- * the number of the inode to load. If this is a fake inode, i.e. NInoAttr(),
- * then the fields type, name, and name_len are also valid, and describe the
- * attribute which this fake inode represents.
+ * the number of the inode to load.
*
* ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
* for reading and sets up the necessary @vi fields as well as initializing
* Q: What locks are held when the function is called?
* A: i_state has I_LOCK set, hence the inode is locked, also
* i_count is set to 1, so it is not going to go away
- * i_flags is set to 0 and we have no business touching it. Only an ioctl()
+ * i_flags is set to 0 and we have no business touching it. Only an ioctl()
* is allowed to write to them. We should of course be honouring them but
* we need to do that using the IS_* macros defined in include/linux/fs.h.
* In any case ntfs_read_locked_inode() has nothing to do with i_flags.
*
- * Return 0 on success and -errno on error. In the error case, the inode will
+ * Return 0 on success and -errno on error. In the error case, the inode will
* have had make_bad_inode() executed on it.
*/
static int ntfs_read_locked_inode(struct inode *vi)
{
ntfs_volume *vol = NTFS_SB(vi->i_sb);
ntfs_inode *ni;
+ struct inode *bvi;
MFT_RECORD *m;
+ ATTR_RECORD *a;
STANDARD_INFORMATION *si;
- attr_search_context *ctx;
+ ntfs_attr_search_ctx *ctx;
int err = 0;
ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
/* Setup the generic vfs inode parts now. */
- /* This is the optimal IO size (for stat), not the fs block size. */
- vi->i_blksize = PAGE_CACHE_SIZE;
/*
* This is for checking whether an inode has changed w.r.t. a file so
* that the file can be updated if necessary (compare with f_version).
err = PTR_ERR(m);
goto err_out;
}
- ctx = get_attr_search_ctx(ni, m);
+ ctx = ntfs_attr_get_search_ctx(ni, m);
if (!ctx) {
err = -ENOMEM;
goto unm_err_out;
}
if (!(m->flags & MFT_RECORD_IN_USE)) {
- ntfs_error(vi->i_sb, "Inode is not in use! You should "
- "run chkdsk.");
+ ntfs_error(vi->i_sb, "Inode is not in use!");
goto unm_err_out;
}
if (m->base_mft_record) {
- ntfs_error(vi->i_sb, "Inode is an extent inode! You should "
- "run chkdsk.");
+ ntfs_error(vi->i_sb, "Inode is an extent inode!");
goto unm_err_out;
}
* Also if not a directory, it could be something else, rather than
* a regular file. But again, will do for now.
*/
+ /* Everyone gets all permissions. */
+ vi->i_mode |= S_IRWXUGO;
+ /* If read-only, noone gets write permissions. */
+ if (IS_RDONLY(vi))
+ vi->i_mode &= ~S_IWUGO;
if (m->flags & MFT_RECORD_IS_DIRECTORY) {
vi->i_mode |= S_IFDIR;
+ /*
+ * Apply the directory permissions mask set in the mount
+ * options.
+ */
+ vi->i_mode &= ~vol->dmask;
/* Things break without this kludge! */
if (vi->i_nlink > 1)
vi->i_nlink = 1;
- } else
+ } else {
vi->i_mode |= S_IFREG;
-
+ /* Apply the file permissions mask set in the mount options. */
+ vi->i_mode &= ~vol->fmask;
+ }
/*
* Find the standard information attribute in the mft record. At this
* stage we haven't setup the attribute list stuff yet, so this could
* in fact fail if the standard information is in an extent record, but
* I don't think this actually ever happens.
*/
- if (!lookup_attr(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0,
- ctx)) {
- /*
- * TODO: We should be performing a hot fix here (if the recover
- * mount option is set) by creating a new attribute.
- */
- ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute is "
- "missing.");
+ err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0,
+ ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT) {
+ /*
+ * TODO: We should be performing a hot fix here (if the
+ * recover mount option is set) by creating a new
+ * attribute.
+ */
+ ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute "
+ "is missing.");
+ }
goto unm_err_out;
}
+ a = ctx->attr;
/* Get the standard information attribute value. */
- si = (STANDARD_INFORMATION*)((char*)ctx->attr +
- le16_to_cpu(ctx->attr->data.resident.value_offset));
+ si = (STANDARD_INFORMATION*)((u8*)a +
+ le16_to_cpu(a->data.resident.value_offset));
- /* Transfer information from the standard information into vfs_ino. */
+ /* Transfer information from the standard information into vi. */
/*
* Note: The i_?times do not quite map perfectly onto the NTFS times,
* but they are close enough, and in the end it doesn't really matter
vi->i_atime = ntfs2utc(si->last_access_time);
/* Find the attribute list attribute if present. */
- reinit_attr_search_ctx(ctx);
- if (lookup_attr(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx)) {
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
+ if (err) {
+ if (unlikely(err != -ENOENT)) {
+ ntfs_error(vi->i_sb, "Failed to lookup attribute list "
+ "attribute.");
+ goto unm_err_out;
+ }
+ } else /* if (!err) */ {
if (vi->i_ino == FILE_MFT)
goto skip_attr_list_load;
ntfs_debug("Attribute list found in inode 0x%lx.", vi->i_ino);
NInoSetAttrList(ni);
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED ||
- ctx->attr->flags & ATTR_COMPRESSION_MASK ||
- ctx->attr->flags & ATTR_IS_SPARSE) {
+ a = ctx->attr;
+ if (a->flags & ATTR_COMPRESSION_MASK) {
ntfs_error(vi->i_sb, "Attribute list attribute is "
- "compressed/encrypted/sparse. Not "
- "allowed. Corrupt inode. You should "
- "run chkdsk.");
+ "compressed.");
goto unm_err_out;
}
+ if (a->flags & ATTR_IS_ENCRYPTED ||
+ a->flags & ATTR_IS_SPARSE) {
+ if (a->non_resident) {
+ ntfs_error(vi->i_sb, "Non-resident attribute "
+ "list attribute is encrypted/"
+ "sparse.");
+ goto unm_err_out;
+ }
+ ntfs_warning(vi->i_sb, "Resident attribute list "
+ "attribute in inode 0x%lx is marked "
+ "encrypted/sparse which is not true. "
+ "However, Windows allows this and "
+ "chkdsk does not detect or correct it "
+ "so we will just ignore the invalid "
+ "flags and pretend they are not set.",
+ vi->i_ino);
+ }
/* Now allocate memory for the attribute list. */
- ni->attr_list_size = (u32)attribute_value_length(ctx->attr);
+ ni->attr_list_size = (u32)ntfs_attr_size(a);
ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
if (!ni->attr_list) {
ntfs_error(vi->i_sb, "Not enough memory to allocate "
err = -ENOMEM;
goto unm_err_out;
}
- if (ctx->attr->non_resident) {
+ if (a->non_resident) {
NInoSetAttrListNonResident(ni);
- if (ctx->attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(vi->i_sb, "Attribute list has non "
- "zero lowest_vcn. Inode is "
- "corrupt. You should run "
- "chkdsk.");
+ "zero lowest_vcn.");
goto unm_err_out;
}
/*
- * Setup the run list. No need for locking as we have
+ * Setup the runlist. No need for locking as we have
* exclusive access to the inode at this time.
*/
- ni->attr_list_rl.rl = decompress_mapping_pairs(vol,
- ctx->attr, NULL);
+ ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
+ a, NULL);
if (IS_ERR(ni->attr_list_rl.rl)) {
err = PTR_ERR(ni->attr_list_rl.rl);
ni->attr_list_rl.rl = NULL;
ntfs_error(vi->i_sb, "Mapping pairs "
- "decompression failed with "
- "error code %i. Corrupt "
- "attribute list in inode.",
- -err);
+ "decompression failed.");
goto unm_err_out;
}
/* Now load the attribute list. */
if ((err = load_attribute_list(vol, &ni->attr_list_rl,
ni->attr_list, ni->attr_list_size,
- sle64_to_cpu(ctx->attr->data.
- non_resident.initialized_size)))) {
+ sle64_to_cpu(a->data.non_resident.
+ initialized_size)))) {
ntfs_error(vi->i_sb, "Failed to load "
"attribute list attribute.");
goto unm_err_out;
}
- } else /* if (!ctx.attr->non_resident) */ {
- if ((u8*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset) +
- le32_to_cpu(
- ctx->attr->data.resident.value_length) >
+ } else /* if (!a->non_resident) */ {
+ if ((u8*)a + le16_to_cpu(a->data.resident.value_offset)
+ + le32_to_cpu(
+ a->data.resident.value_length) >
(u8*)ctx->mrec + vol->mft_record_size) {
ntfs_error(vi->i_sb, "Corrupt attribute list "
"in inode.");
goto unm_err_out;
}
/* Now copy the attribute list. */
- memcpy(ni->attr_list, (u8*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset),
+ memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
+ a->data.resident.value_offset),
le32_to_cpu(
- ctx->attr->data.resident.value_length));
+ a->data.resident.value_length));
}
}
skip_attr_list_load:
* in ntfs_ino->attr_list and it is ntfs_ino->attr_list_size bytes.
*/
if (S_ISDIR(vi->i_mode)) {
- struct inode *bvi;
+ loff_t bvi_size;
ntfs_inode *bni;
INDEX_ROOT *ir;
- char *ir_end, *index_end;
+ u8 *ir_end, *index_end;
/* It is a directory, find index root attribute. */
- reinit_attr_search_ctx(ctx);
- if (!lookup_attr(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE, 0,
- NULL, 0, ctx)) {
- // FIXME: File is corrupt! Hot-fix with empty index
- // root attribute if recovery option is set.
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
- "missing.");
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE,
+ 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT) {
+ // FIXME: File is corrupt! Hot-fix with empty
+ // index root attribute if recovery option is
+ // set.
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute "
+ "is missing.");
+ }
goto unm_err_out;
}
+ a = ctx->attr;
/* Set up the state. */
- if (ctx->attr->non_resident) {
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
- "not resident. Not allowed.");
+ if (unlikely(a->non_resident)) {
+ ntfs_error(vol->sb, "$INDEX_ROOT attribute is not "
+ "resident.");
+ goto unm_err_out;
+ }
+ /* Ensure the attribute name is placed before the value. */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(a->data.resident.value_offset)))) {
+ ntfs_error(vol->sb, "$INDEX_ROOT attribute name is "
+ "placed after the attribute value.");
goto unm_err_out;
}
/*
* encrypted. However index root cannot be both compressed and
* encrypted.
*/
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK)
+ if (a->flags & ATTR_COMPRESSION_MASK)
NInoSetCompressed(ni);
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED) {
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
+ if (a->flags & ATTR_IS_ENCRYPTED) {
+ if (a->flags & ATTR_COMPRESSION_MASK) {
ntfs_error(vi->i_sb, "Found encrypted and "
- "compressed attribute. Not "
- "allowed.");
+ "compressed attribute.");
goto unm_err_out;
}
NInoSetEncrypted(ni);
}
- if (ctx->attr->flags & ATTR_IS_SPARSE)
+ if (a->flags & ATTR_IS_SPARSE)
NInoSetSparse(ni);
- ir = (INDEX_ROOT*)((char*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset));
- ir_end = (char*)ir + le32_to_cpu(
- ctx->attr->data.resident.value_length);
- if (ir_end > (char*)ctx->mrec + vol->mft_record_size) {
+ ir = (INDEX_ROOT*)((u8*)a +
+ le16_to_cpu(a->data.resident.value_offset));
+ ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
+ if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
"corrupt.");
goto unm_err_out;
}
- index_end = (char*)&ir->index +
+ index_end = (u8*)&ir->index +
le32_to_cpu(ir->index.index_length);
if (index_end > ir_end) {
ntfs_error(vi->i_sb, "Directory index is corrupt.");
}
if (ir->type != AT_FILE_NAME) {
ntfs_error(vi->i_sb, "Indexed attribute is not "
- "$FILE_NAME. Not allowed.");
+ "$FILE_NAME.");
goto unm_err_out;
}
if (ir->collation_rule != COLLATION_FILE_NAME) {
ntfs_error(vi->i_sb, "Index collation rule is not "
- "COLLATION_FILE_NAME. Not allowed.");
+ "COLLATION_FILE_NAME.");
goto unm_err_out;
}
+ ni->itype.index.collation_rule = ir->collation_rule;
ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
if (ni->itype.index.block_size &
(ni->itype.index.block_size - 1)) {
if (ni->itype.index.block_size > PAGE_CACHE_SIZE) {
ntfs_error(vi->i_sb, "Index block size (%u) > "
"PAGE_CACHE_SIZE (%ld) is not "
- "supported. Sorry.",
+ "supported. Sorry.",
ni->itype.index.block_size,
PAGE_CACHE_SIZE);
err = -EOPNOTSUPP;
if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
ntfs_error(vi->i_sb, "Index block size (%u) < "
"NTFS_BLOCK_SIZE (%i) is not "
- "supported. Sorry.",
+ "supported. Sorry.",
ni->itype.index.block_size,
NTFS_BLOCK_SIZE);
err = -EOPNOTSUPP;
vi->i_size = ni->initialized_size =
ni->allocated_size = 0;
/* We are done with the mft record, so we release it. */
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(ni);
m = NULL;
ctx = NULL;
} /* LARGE_INDEX: Index allocation present. Setup state. */
NInoSetIndexAllocPresent(ni);
/* Find index allocation attribute. */
- reinit_attr_search_ctx(ctx);
- if (!lookup_attr(AT_INDEX_ALLOCATION, I30, 4, CASE_SENSITIVE,
- 0, NULL, 0, ctx)) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
- "is not present but $INDEX_ROOT "
- "indicated it is.");
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, I30, 4,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION "
+ "attribute is not present but "
+ "$INDEX_ROOT indicated it is.");
+ else
+ ntfs_error(vi->i_sb, "Failed to lookup "
+ "$INDEX_ALLOCATION "
+ "attribute.");
goto unm_err_out;
}
- if (!ctx->attr->non_resident) {
+ a = ctx->attr;
+ if (!a->non_resident) {
ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
"is resident.");
goto unm_err_out;
}
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED) {
+ /*
+ * Ensure the attribute name is placed before the mapping pairs
+ * array.
+ */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(
+ a->data.non_resident.mapping_pairs_offset)))) {
+ ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name "
+ "is placed after the mapping pairs "
+ "array.");
+ goto unm_err_out;
+ }
+ if (a->flags & ATTR_IS_ENCRYPTED) {
ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
"is encrypted.");
goto unm_err_out;
}
- if (ctx->attr->flags & ATTR_IS_SPARSE) {
+ if (a->flags & ATTR_IS_SPARSE) {
ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
"is sparse.");
goto unm_err_out;
}
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
+ if (a->flags & ATTR_COMPRESSION_MASK) {
ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
"is compressed.");
goto unm_err_out;
}
- if (ctx->attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(vi->i_sb, "First extent of "
"$INDEX_ALLOCATION attribute has non "
- "zero lowest_vcn. Inode is corrupt. "
- "You should run chkdsk.");
+ "zero lowest_vcn.");
goto unm_err_out;
}
- vi->i_size = sle64_to_cpu(
- ctx->attr->data.non_resident.data_size);
+ vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
ni->initialized_size = sle64_to_cpu(
- ctx->attr->data.non_resident.initialized_size);
+ a->data.non_resident.initialized_size);
ni->allocated_size = sle64_to_cpu(
- ctx->attr->data.non_resident.allocated_size);
+ a->data.non_resident.allocated_size);
/*
* We are done with the mft record, so we release it. Otherwise
* we would deadlock in ntfs_attr_iget().
*/
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(ni);
m = NULL;
ctx = NULL;
/* Get the index bitmap attribute inode. */
bvi = ntfs_attr_iget(vi, AT_BITMAP, I30, 4);
- if (unlikely(IS_ERR(bvi))) {
+ if (IS_ERR(bvi)) {
ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
err = PTR_ERR(bvi);
goto unm_err_out;
}
- ni->itype.index.bmp_ino = bvi;
bni = NTFS_I(bvi);
if (NInoCompressed(bni) || NInoEncrypted(bni) ||
NInoSparse(bni)) {
ntfs_error(vi->i_sb, "$BITMAP attribute is compressed "
"and/or encrypted and/or sparse.");
- goto unm_err_out;
+ goto iput_unm_err_out;
}
/* Consistency check bitmap size vs. index allocation size. */
- if ((bvi->i_size << 3) < (vi->i_size >>
+ bvi_size = i_size_read(bvi);
+ if ((bvi_size << 3) < (vi->i_size >>
ni->itype.index.block_size_bits)) {
ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
"for index allocation (0x%llx).",
- bvi->i_size << 3, vi->i_size);
- goto unm_err_out;
+ bvi_size << 3, vi->i_size);
+ goto iput_unm_err_out;
}
+ /* No longer need the bitmap attribute inode. */
+ iput(bvi);
skip_large_dir_stuff:
- /* Everyone gets read and scan permissions. */
- vi->i_mode |= S_IRUGO | S_IXUGO;
- /* If not read-only, set write permissions. */
- if (!IS_RDONLY(vi))
- vi->i_mode |= S_IWUGO;
- /*
- * Apply the directory permissions mask set in the mount
- * options.
- */
- vi->i_mode &= ~vol->dmask;
/* Setup the operations for this inode. */
vi->i_op = &ntfs_dir_inode_ops;
vi->i_fop = &ntfs_dir_ops;
- vi->i_mapping->a_ops = &ntfs_mst_aops;
} else {
/* It is a file. */
- reinit_attr_search_ctx(ctx);
+ ntfs_attr_reinit_search_ctx(ctx);
/* Setup the data attribute, even if not present. */
ni->type = AT_DATA;
ni->name_len = 0;
/* Find first extent of the unnamed data attribute. */
- if (!lookup_attr(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx)) {
+ err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
vi->i_size = ni->initialized_size =
- ni->allocated_size = 0LL;
+ ni->allocated_size = 0;
+ if (err != -ENOENT) {
+ ntfs_error(vi->i_sb, "Failed to lookup $DATA "
+ "attribute.");
+ goto unm_err_out;
+ }
/*
* FILE_Secure does not have an unnamed $DATA
* attribute, so we special case it here.
goto no_data_attr_special_case;
// FIXME: File is corrupt! Hot-fix with empty data
// attribute if recovery option is set.
- ntfs_error(vi->i_sb, "$DATA attribute is "
- "missing.");
+ ntfs_error(vi->i_sb, "$DATA attribute is missing.");
goto unm_err_out;
}
+ a = ctx->attr;
/* Setup the state. */
- if (ctx->attr->non_resident) {
- NInoSetNonResident(ni);
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
+ if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
+ if (a->flags & ATTR_COMPRESSION_MASK) {
NInoSetCompressed(ni);
if (vol->cluster_size > 4096) {
ntfs_error(vi->i_sb, "Found "
- "compressed data but "
- "compression is disabled due "
- "to cluster size (%i) > 4kiB.",
- vol->cluster_size);
+ "compressed data but "
+ "compression is "
+ "disabled due to "
+ "cluster size (%i) > "
+ "4kiB.",
+ vol->cluster_size);
goto unm_err_out;
}
- if ((ctx->attr->flags & ATTR_COMPRESSION_MASK)
+ if ((a->flags & ATTR_COMPRESSION_MASK)
!= ATTR_IS_COMPRESSED) {
- ntfs_error(vi->i_sb, "Found "
- "unknown compression method or "
- "corrupt file.");
+ ntfs_error(vi->i_sb, "Found unknown "
+ "compression method "
+ "or corrupt file.");
goto unm_err_out;
}
- ni->itype.compressed.block_clusters = 1U <<
- ctx->attr->data.non_resident.
- compression_unit;
- if (ctx->attr->data.non_resident.
+ }
+ if (a->flags & ATTR_IS_SPARSE)
+ NInoSetSparse(ni);
+ }
+ if (a->flags & ATTR_IS_ENCRYPTED) {
+ if (NInoCompressed(ni)) {
+ ntfs_error(vi->i_sb, "Found encrypted and "
+ "compressed data.");
+ goto unm_err_out;
+ }
+ NInoSetEncrypted(ni);
+ }
+ if (a->non_resident) {
+ NInoSetNonResident(ni);
+ if (NInoCompressed(ni) || NInoSparse(ni)) {
+ if (NInoCompressed(ni) && a->data.non_resident.
compression_unit != 4) {
ntfs_error(vi->i_sb, "Found "
- "nonstandard compression unit "
- "(%u instead of 4). Cannot "
- "handle this. This might "
- "indicate corruption so you "
- "should run chkdsk.",
- ctx->attr->data.non_resident.
- compression_unit);
+ "non-standard "
+ "compression unit (%u "
+ "instead of 4). "
+ "Cannot handle this.",
+ a->data.non_resident.
+ compression_unit);
err = -EOPNOTSUPP;
goto unm_err_out;
}
- ni->itype.compressed.block_size = 1U << (
- ctx->attr->data.non_resident.
- compression_unit +
- vol->cluster_size_bits);
- ni->itype.compressed.block_size_bits = ffs(
- ni->itype.compressed.block_size) - 1;
- }
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED) {
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "Found encrypted "
- "and compressed data.");
- goto unm_err_out;
+ if (a->data.non_resident.compression_unit) {
+ ni->itype.compressed.block_size = 1U <<
+ (a->data.non_resident.
+ compression_unit +
+ vol->cluster_size_bits);
+ ni->itype.compressed.block_size_bits =
+ ffs(ni->itype.
+ compressed.
+ block_size) - 1;
+ ni->itype.compressed.block_clusters =
+ 1U << a->data.
+ non_resident.
+ compression_unit;
+ } else {
+ ni->itype.compressed.block_size = 0;
+ ni->itype.compressed.block_size_bits =
+ 0;
+ ni->itype.compressed.block_clusters =
+ 0;
}
- NInoSetEncrypted(ni);
+ ni->itype.compressed.size = sle64_to_cpu(
+ a->data.non_resident.
+ compressed_size);
}
- if (ctx->attr->flags & ATTR_IS_SPARSE)
- NInoSetSparse(ni);
- if (ctx->attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(vi->i_sb, "First extent of $DATA "
"attribute has non zero "
- "lowest_vcn. Inode is corrupt. "
- "You should run chkdsk.");
+ "lowest_vcn.");
goto unm_err_out;
}
- /* Setup all the sizes. */
vi->i_size = sle64_to_cpu(
- ctx->attr->data.non_resident.data_size);
+ a->data.non_resident.data_size);
ni->initialized_size = sle64_to_cpu(
- ctx->attr->data.non_resident.
- initialized_size);
+ a->data.non_resident.initialized_size);
ni->allocated_size = sle64_to_cpu(
- ctx->attr->data.non_resident.
- allocated_size);
- if (NInoCompressed(ni)) {
- ni->itype.compressed.size = sle64_to_cpu(
- ctx->attr->data.non_resident.
- compressed_size);
- }
+ a->data.non_resident.allocated_size);
} else { /* Resident attribute. */
- /*
- * Make all sizes equal for simplicity in read code
- * paths. FIXME: Need to keep this in mind when
- * converting to non-resident attribute in write code
- * path. (Probably only affects truncate().)
- */
- vi->i_size = ni->initialized_size = ni->allocated_size =
- le32_to_cpu(
- ctx->attr->data.resident.value_length);
+ vi->i_size = ni->initialized_size = le32_to_cpu(
+ a->data.resident.value_length);
+ ni->allocated_size = le32_to_cpu(a->length) -
+ le16_to_cpu(
+ a->data.resident.value_offset);
+ if (vi->i_size > ni->allocated_size) {
+ ntfs_error(vi->i_sb, "Resident data attribute "
+ "is corrupt (size exceeds "
+ "allocation).");
+ goto unm_err_out;
+ }
}
no_data_attr_special_case:
/* We are done with the mft record, so we release it. */
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(ni);
m = NULL;
ctx = NULL;
- /* Everyone gets all permissions. */
- vi->i_mode |= S_IRWXUGO;
- /* If read-only, noone gets write permissions. */
- if (IS_RDONLY(vi))
- vi->i_mode &= ~S_IWUGO;
- /* Apply the file permissions mask set in the mount options. */
- vi->i_mode &= ~vol->fmask;
/* Setup the operations for this inode. */
vi->i_op = &ntfs_file_inode_ops;
vi->i_fop = &ntfs_file_ops;
- vi->i_mapping->a_ops = &ntfs_aops;
}
+ if (NInoMstProtected(ni))
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
+ else
+ vi->i_mapping->a_ops = &ntfs_aops;
/*
* The number of 512-byte blocks used on disk (for stat). This is in so
* far inaccurate as it doesn't account for any named streams or other
* sizes of all non-resident attributes present to give us the Linux
* correct size that should go into i_blocks (after division by 512).
*/
- if (S_ISDIR(vi->i_mode) || !NInoCompressed(ni))
- vi->i_blocks = ni->allocated_size >> 9;
- else
+ if (S_ISREG(vi->i_mode) && (NInoCompressed(ni) || NInoSparse(ni)))
vi->i_blocks = ni->itype.compressed.size >> 9;
-
+ else
+ vi->i_blocks = ni->allocated_size >> 9;
ntfs_debug("Done.");
return 0;
-
+iput_unm_err_out:
+ iput(bvi);
unm_err_out:
if (!err)
err = -EIO;
if (ctx)
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
if (m)
unmap_mft_record(ni);
err_out:
- ntfs_error(vi->i_sb, "Failed with error code %i. Marking inode 0x%lx "
- "as bad.", -err, vi->i_ino);
+ ntfs_error(vol->sb, "Failed with error code %i. Marking corrupt "
+ "inode 0x%lx as bad. Run chkdsk.", err, vi->i_ino);
make_bad_inode(vi);
+ if (err != -EOPNOTSUPP && err != -ENOMEM)
+ NVolSetErrors(vol);
return err;
}
* @base_vi: base inode
* @vi: attribute inode to read
*
- * ntfs_read_locked_attr_inode() is called from the ntfs_attr_iget() to read
- * the attribute inode described by @vi into memory from the base mft record
+ * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the
+ * attribute inode described by @vi into memory from the base mft record
* described by @base_ni.
*
* ntfs_read_locked_attr_inode() maps, pins and locks the base inode for
* Q: What locks are held when the function is called?
* A: i_state has I_LOCK set, hence the inode is locked, also
* i_count is set to 1, so it is not going to go away
+ *
+ * Return 0 on success and -errno on error. In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ *
+ * Note this cannot be called for AT_INDEX_ALLOCATION.
*/
static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
{
ntfs_volume *vol = NTFS_SB(vi->i_sb);
ntfs_inode *ni, *base_ni;
MFT_RECORD *m;
- attr_search_context *ctx;
+ ATTR_RECORD *a;
+ ntfs_attr_search_ctx *ctx;
int err = 0;
ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
base_ni = NTFS_I(base_vi);
/* Just mirror the values from the base inode. */
- vi->i_blksize = base_vi->i_blksize;
vi->i_version = base_vi->i_version;
vi->i_uid = base_vi->i_uid;
vi->i_gid = base_vi->i_gid;
err = PTR_ERR(m);
goto err_out;
}
- ctx = get_attr_search_ctx(base_ni, m);
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
if (!ctx) {
err = -ENOMEM;
goto unm_err_out;
}
-
/* Find the attribute. */
- if (!lookup_attr(ni->type, ni->name, ni->name_len, IGNORE_CASE, 0,
- NULL, 0, ctx))
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err))
goto unm_err_out;
-
- if (!ctx->attr->non_resident) {
- if (NInoMstProtected(ni) || ctx->attr->flags) {
- ntfs_error(vi->i_sb, "Found mst protected attribute "
- "or attribute with non-zero flags but "
- "the attribute is resident (mft_no "
- "0x%lx, type 0x%x, name_len %i). "
- "Please report you saw this message "
- "to linux-ntfs-dev@lists."
- "sourceforge.net",
- vi->i_ino, ni->type, ni->name_len);
- goto unm_err_out;
- }
- /*
- * Resident attribute. Make all sizes equal for simplicity in
- * read code paths.
- */
- vi->i_size = ni->initialized_size = ni->allocated_size =
- le32_to_cpu(ctx->attr->data.resident.value_length);
- } else {
- NInoSetNonResident(ni);
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
- if (NInoMstProtected(ni)) {
- ntfs_error(vi->i_sb, "Found mst protected "
- "attribute but the attribute "
- "is compressed (mft_no 0x%lx, "
- "type 0x%x, name_len %i). "
- "Please report you saw this "
- "message to linux-ntfs-dev@"
- "lists.sourceforge.net",
- vi->i_ino, ni->type,
- ni->name_len);
- goto unm_err_out;
- }
+ a = ctx->attr;
+ if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
+ if (a->flags & ATTR_COMPRESSION_MASK) {
NInoSetCompressed(ni);
if ((ni->type != AT_DATA) || (ni->type == AT_DATA &&
ni->name_len)) {
- ntfs_error(vi->i_sb, "Found compressed non-"
- "data or named data attribute "
- "(mft_no 0x%lx, type 0x%x, "
- "name_len %i). Please report "
+ ntfs_error(vi->i_sb, "Found compressed "
+ "non-data or named data "
+ "attribute. Please report "
"you saw this message to "
"linux-ntfs-dev@lists."
- "sourceforge.net",
- vi->i_ino, ni->type,
- ni->name_len);
+ "sourceforge.net");
goto unm_err_out;
}
if (vol->cluster_size > 4096) {
- ntfs_error(vi->i_sb, "Found "
- "compressed attribute but "
- "compression is disabled due "
- "to cluster size (%i) > 4kiB.",
- vol->cluster_size);
+ ntfs_error(vi->i_sb, "Found compressed "
+ "attribute but compression is "
+ "disabled due to cluster size "
+ "(%i) > 4kiB.",
+ vol->cluster_size);
goto unm_err_out;
}
- if ((ctx->attr->flags & ATTR_COMPRESSION_MASK)
- != ATTR_IS_COMPRESSED) {
+ if ((a->flags & ATTR_COMPRESSION_MASK) !=
+ ATTR_IS_COMPRESSED) {
ntfs_error(vi->i_sb, "Found unknown "
- "compression method or "
- "corrupt file.");
+ "compression method.");
goto unm_err_out;
}
- ni->itype.compressed.block_clusters = 1U <<
- ctx->attr->data.non_resident.
- compression_unit;
- if (ctx->attr->data.non_resident.compression_unit != 4) {
- ntfs_error(vi->i_sb, "Found "
- "nonstandard compression unit "
- "(%u instead of 4). Cannot "
- "handle this. This might "
- "indicate corruption so you "
- "should run chkdsk.",
- ctx->attr->data.non_resident.
- compression_unit);
+ }
+ /*
+ * The compressed/sparse flag set in an index root just means
+ * to compress all files.
+ */
+ if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
+ ntfs_error(vi->i_sb, "Found mst protected attribute "
+ "but the attribute is %s. Please "
+ "report you saw this message to "
+ "linux-ntfs-dev@lists.sourceforge.net",
+ NInoCompressed(ni) ? "compressed" :
+ "sparse");
+ goto unm_err_out;
+ }
+ if (a->flags & ATTR_IS_SPARSE)
+ NInoSetSparse(ni);
+ }
+ if (a->flags & ATTR_IS_ENCRYPTED) {
+ if (NInoCompressed(ni)) {
+ ntfs_error(vi->i_sb, "Found encrypted and compressed "
+ "data.");
+ goto unm_err_out;
+ }
+ /*
+ * The encryption flag set in an index root just means to
+ * encrypt all files.
+ */
+ if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
+ ntfs_error(vi->i_sb, "Found mst protected attribute "
+ "but the attribute is encrypted. "
+ "Please report you saw this message "
+ "to linux-ntfs-dev@lists.sourceforge."
+ "net");
+ goto unm_err_out;
+ }
+ if (ni->type != AT_DATA) {
+ ntfs_error(vi->i_sb, "Found encrypted non-data "
+ "attribute.");
+ goto unm_err_out;
+ }
+ NInoSetEncrypted(ni);
+ }
+ if (!a->non_resident) {
+ /* Ensure the attribute name is placed before the value. */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(a->data.resident.value_offset)))) {
+ ntfs_error(vol->sb, "Attribute name is placed after "
+ "the attribute value.");
+ goto unm_err_out;
+ }
+ if (NInoMstProtected(ni)) {
+ ntfs_error(vi->i_sb, "Found mst protected attribute "
+ "but the attribute is resident. "
+ "Please report you saw this message to "
+ "linux-ntfs-dev@lists.sourceforge.net");
+ goto unm_err_out;
+ }
+ vi->i_size = ni->initialized_size = le32_to_cpu(
+ a->data.resident.value_length);
+ ni->allocated_size = le32_to_cpu(a->length) -
+ le16_to_cpu(a->data.resident.value_offset);
+ if (vi->i_size > ni->allocated_size) {
+ ntfs_error(vi->i_sb, "Resident attribute is corrupt "
+ "(size exceeds allocation).");
+ goto unm_err_out;
+ }
+ } else {
+ NInoSetNonResident(ni);
+ /*
+ * Ensure the attribute name is placed before the mapping pairs
+ * array.
+ */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(
+ a->data.non_resident.mapping_pairs_offset)))) {
+ ntfs_error(vol->sb, "Attribute name is placed after "
+ "the mapping pairs array.");
+ goto unm_err_out;
+ }
+ if (NInoCompressed(ni) || NInoSparse(ni)) {
+ if (NInoCompressed(ni) && a->data.non_resident.
+ compression_unit != 4) {
+ ntfs_error(vi->i_sb, "Found non-standard "
+ "compression unit (%u instead "
+ "of 4). Cannot handle this.",
+ a->data.non_resident.
+ compression_unit);
err = -EOPNOTSUPP;
goto unm_err_out;
}
- ni->itype.compressed.block_size = 1U << (
- ctx->attr->data.non_resident.
- compression_unit +
- vol->cluster_size_bits);
- ni->itype.compressed.block_size_bits = ffs(
- ni->itype.compressed.block_size) - 1;
- }
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED) {
- if (ctx->attr->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "Found encrypted "
- "and compressed data.");
- goto unm_err_out;
- }
- if (NInoMstProtected(ni)) {
- ntfs_error(vi->i_sb, "Found mst protected "
- "attribute but the attribute "
- "is encrypted (mft_no 0x%lx, "
- "type 0x%x, name_len %i). "
- "Please report you saw this "
- "message to linux-ntfs-dev@"
- "lists.sourceforge.net",
- vi->i_ino, ni->type,
- ni->name_len);
- goto unm_err_out;
- }
- NInoSetEncrypted(ni);
- }
- if (ctx->attr->flags & ATTR_IS_SPARSE) {
- if (NInoMstProtected(ni)) {
- ntfs_error(vi->i_sb, "Found mst protected "
- "attribute but the attribute "
- "is sparse (mft_no 0x%lx, "
- "type 0x%x, name_len %i). "
- "Please report you saw this "
- "message to linux-ntfs-dev@"
- "lists.sourceforge.net",
- vi->i_ino, ni->type,
- ni->name_len);
- goto unm_err_out;
+ if (a->data.non_resident.compression_unit) {
+ ni->itype.compressed.block_size = 1U <<
+ (a->data.non_resident.
+ compression_unit +
+ vol->cluster_size_bits);
+ ni->itype.compressed.block_size_bits =
+ ffs(ni->itype.compressed.
+ block_size) - 1;
+ ni->itype.compressed.block_clusters = 1U <<
+ a->data.non_resident.
+ compression_unit;
+ } else {
+ ni->itype.compressed.block_size = 0;
+ ni->itype.compressed.block_size_bits = 0;
+ ni->itype.compressed.block_clusters = 0;
}
- NInoSetSparse(ni);
+ ni->itype.compressed.size = sle64_to_cpu(
+ a->data.non_resident.compressed_size);
}
- if (ctx->attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(vi->i_sb, "First extent of attribute has "
- "non-zero lowest_vcn. Inode is "
- "corrupt. You should run chkdsk.");
+ "non-zero lowest_vcn.");
goto unm_err_out;
}
- /* Setup all the sizes. */
- vi->i_size = sle64_to_cpu(
- ctx->attr->data.non_resident.data_size);
+ vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
ni->initialized_size = sle64_to_cpu(
- ctx->attr->data.non_resident.initialized_size);
+ a->data.non_resident.initialized_size);
ni->allocated_size = sle64_to_cpu(
- ctx->attr->data.non_resident.allocated_size);
- if (NInoCompressed(ni)) {
- ni->itype.compressed.size = sle64_to_cpu(
- ctx->attr->data.non_resident.
- compressed_size);
- }
+ a->data.non_resident.allocated_size);
}
-
/* Setup the operations for this attribute inode. */
vi->i_op = NULL;
vi->i_fop = NULL;
vi->i_mapping->a_ops = &ntfs_mst_aops;
else
vi->i_mapping->a_ops = &ntfs_aops;
-
- if (!NInoCompressed(ni))
- vi->i_blocks = ni->allocated_size >> 9;
- else
+ if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT)
vi->i_blocks = ni->itype.compressed.size >> 9;
-
+ else
+ vi->i_blocks = ni->allocated_size >> 9;
/*
- * Make sure the base inode doesn't go away and attach it to the
+ * Make sure the base inode does not go away and attach it to the
* attribute inode.
*/
igrab(base_vi);
ni->ext.base_ntfs_ino = base_ni;
ni->nr_extents = -1;
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(base_ni);
ntfs_debug("Done.");
if (!err)
err = -EIO;
if (ctx)
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
unmap_mft_record(base_ni);
err_out:
- ntfs_error(vi->i_sb, "Failed with error code %i while reading "
- "attribute inode (mft_no 0x%lx, type 0x%x, name_len "
- "%i.", -err, vi->i_ino, ni->type, ni->name_len);
+ ntfs_error(vol->sb, "Failed with error code %i while reading attribute "
+ "inode (mft_no 0x%lx, type 0x%x, name_len %i). "
+ "Marking corrupt inode and base inode 0x%lx as bad. "
+ "Run chkdsk.", err, vi->i_ino, ni->type, ni->name_len,
+ base_vi->i_ino);
make_bad_inode(vi);
+ if (err != -ENOMEM)
+ NVolSetErrors(vol);
return err;
}
/**
- * ntfs_read_inode_mount - special read_inode for mount time use only
- * @vi: inode to read
+ * ntfs_read_locked_index_inode - read an index inode from its base inode
+ * @base_vi: base inode
+ * @vi: index inode to read
*
- * Read inode FILE_MFT at mount time, only called with super_block lock
- * held from within the read_super() code path.
+ * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the
+ * index inode described by @vi into memory from the base mft record described
+ * by @base_ni.
*
- * This function exists because when it is called the page cache for $MFT/$DATA
- * is not initialized and hence we cannot get at the contents of mft records
- * by calling map_mft_record*().
+ * ntfs_read_locked_index_inode() maps, pins and locks the base inode for
+ * reading and looks up the attributes relating to the index described by @vi
+ * before setting up the necessary fields in @vi as well as initializing the
+ * ntfs inode.
*
- * Further it needs to cope with the circular references problem, i.e. can't
- * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because
- * we don't know where the other extent mft records are yet and again, because
- * we cannot call map_mft_record*() yet. Obviously this applies only when an
- * attribute list is actually present in $MFT inode.
+ * Note, index inodes are essentially attribute inodes (NInoAttr() is true)
+ * with the attribute type set to AT_INDEX_ALLOCATION. Apart from that, they
+ * are setup like directory inodes since directories are a special case of
+ * indices ao they need to be treated in much the same way. Most importantly,
+ * for small indices the index allocation attribute might not actually exist.
+ * However, the index root attribute always exists but this does not need to
+ * have an inode associated with it and this is why we define a new inode type
+ * index. Also, like for directories, we need to have an attribute inode for
+ * the bitmap attribute corresponding to the index allocation attribute and we
+ * can store this in the appropriate field of the inode, just like we do for
+ * normal directory inodes.
*
- * We solve these problems by starting with the $DATA attribute before anything
- * else and iterating using lookup_attr($DATA) over all extents. As each extent
- * is found, we decompress_mapping_pairs() including the implied
- * merge_run_lists(). Each step of the iteration necessarily provides
- * sufficient information for the next step to complete.
+ * Q: What locks are held when the function is called?
+ * A: i_state has I_LOCK set, hence the inode is locked, also
+ * i_count is set to 1, so it is not going to go away
*
- * This should work but there are two possible pit falls (see inline comments
+ * Return 0 on success and -errno on error. In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ */
+static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
+{
+ loff_t bvi_size;
+ ntfs_volume *vol = NTFS_SB(vi->i_sb);
+ ntfs_inode *ni, *base_ni, *bni;
+ struct inode *bvi;
+ MFT_RECORD *m;
+ ATTR_RECORD *a;
+ ntfs_attr_search_ctx *ctx;
+ INDEX_ROOT *ir;
+ u8 *ir_end, *index_end;
+ int err = 0;
+
+ ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
+ ntfs_init_big_inode(vi);
+ ni = NTFS_I(vi);
+ base_ni = NTFS_I(base_vi);
+ /* Just mirror the values from the base inode. */
+ vi->i_version = base_vi->i_version;
+ vi->i_uid = base_vi->i_uid;
+ vi->i_gid = base_vi->i_gid;
+ vi->i_nlink = base_vi->i_nlink;
+ vi->i_mtime = base_vi->i_mtime;
+ vi->i_ctime = base_vi->i_ctime;
+ vi->i_atime = base_vi->i_atime;
+ vi->i_generation = ni->seq_no = base_ni->seq_no;
+ /* Set inode type to zero but preserve permissions. */
+ vi->i_mode = base_vi->i_mode & ~S_IFMT;
+ /* Map the mft record for the base inode. */
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ goto err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (!ctx) {
+ err = -ENOMEM;
+ goto unm_err_out;
+ }
+ /* Find the index root attribute. */
+ err = ntfs_attr_lookup(AT_INDEX_ROOT, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
+ "missing.");
+ goto unm_err_out;
+ }
+ a = ctx->attr;
+ /* Set up the state. */
+ if (unlikely(a->non_resident)) {
+ ntfs_error(vol->sb, "$INDEX_ROOT attribute is not resident.");
+ goto unm_err_out;
+ }
+ /* Ensure the attribute name is placed before the value. */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(a->data.resident.value_offset)))) {
+ ntfs_error(vol->sb, "$INDEX_ROOT attribute name is placed "
+ "after the attribute value.");
+ goto unm_err_out;
+ }
+ /*
+ * Compressed/encrypted/sparse index root is not allowed, except for
+ * directories of course but those are not dealt with here.
+ */
+ if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED |
+ ATTR_IS_SPARSE)) {
+ ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index "
+ "root attribute.");
+ goto unm_err_out;
+ }
+ ir = (INDEX_ROOT*)((u8*)a + le16_to_cpu(a->data.resident.value_offset));
+ ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
+ if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
+ ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt.");
+ goto unm_err_out;
+ }
+ index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length);
+ if (index_end > ir_end) {
+ ntfs_error(vi->i_sb, "Index is corrupt.");
+ goto unm_err_out;
+ }
+ if (ir->type) {
+ ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x).",
+ le32_to_cpu(ir->type));
+ goto unm_err_out;
+ }
+ ni->itype.index.collation_rule = ir->collation_rule;
+ ntfs_debug("Index collation rule is 0x%x.",
+ le32_to_cpu(ir->collation_rule));
+ ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
+ if (ni->itype.index.block_size & (ni->itype.index.block_size - 1)) {
+ ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
+ "two.", ni->itype.index.block_size);
+ goto unm_err_out;
+ }
+ if (ni->itype.index.block_size > PAGE_CACHE_SIZE) {
+ ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_CACHE_SIZE "
+ "(%ld) is not supported. Sorry.",
+ ni->itype.index.block_size, PAGE_CACHE_SIZE);
+ err = -EOPNOTSUPP;
+ goto unm_err_out;
+ }
+ if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
+ ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE "
+ "(%i) is not supported. Sorry.",
+ ni->itype.index.block_size, NTFS_BLOCK_SIZE);
+ err = -EOPNOTSUPP;
+ goto unm_err_out;
+ }
+ ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1;
+ /* Determine the size of a vcn in the index. */
+ if (vol->cluster_size <= ni->itype.index.block_size) {
+ ni->itype.index.vcn_size = vol->cluster_size;
+ ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
+ } else {
+ ni->itype.index.vcn_size = vol->sector_size;
+ ni->itype.index.vcn_size_bits = vol->sector_size_bits;
+ }
+ /* Check for presence of index allocation attribute. */
+ if (!(ir->index.flags & LARGE_INDEX)) {
+ /* No index allocation. */
+ vi->i_size = ni->initialized_size = ni->allocated_size = 0;
+ /* We are done with the mft record, so we release it. */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ m = NULL;
+ ctx = NULL;
+ goto skip_large_index_stuff;
+ } /* LARGE_INDEX: Index allocation present. Setup state. */
+ NInoSetIndexAllocPresent(ni);
+ /* Find index allocation attribute. */
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "not present but $INDEX_ROOT "
+ "indicated it is.");
+ else
+ ntfs_error(vi->i_sb, "Failed to lookup "
+ "$INDEX_ALLOCATION attribute.");
+ goto unm_err_out;
+ }
+ a = ctx->attr;
+ if (!a->non_resident) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "resident.");
+ goto unm_err_out;
+ }
+ /*
+ * Ensure the attribute name is placed before the mapping pairs array.
+ */
+ if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+ le16_to_cpu(
+ a->data.non_resident.mapping_pairs_offset)))) {
+ ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name is "
+ "placed after the mapping pairs array.");
+ goto unm_err_out;
+ }
+ if (a->flags & ATTR_IS_ENCRYPTED) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "encrypted.");
+ goto unm_err_out;
+ }
+ if (a->flags & ATTR_IS_SPARSE) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse.");
+ goto unm_err_out;
+ }
+ if (a->flags & ATTR_COMPRESSION_MASK) {
+ ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+ "compressed.");
+ goto unm_err_out;
+ }
+ if (a->data.non_resident.lowest_vcn) {
+ ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION "
+ "attribute has non zero lowest_vcn.");
+ goto unm_err_out;
+ }
+ vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
+ ni->initialized_size = sle64_to_cpu(
+ a->data.non_resident.initialized_size);
+ ni->allocated_size = sle64_to_cpu(a->data.non_resident.allocated_size);
+ /*
+ * We are done with the mft record, so we release it. Otherwise
+ * we would deadlock in ntfs_attr_iget().
+ */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ m = NULL;
+ ctx = NULL;
+ /* Get the index bitmap attribute inode. */
+ bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len);
+ if (IS_ERR(bvi)) {
+ ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
+ err = PTR_ERR(bvi);
+ goto unm_err_out;
+ }
+ bni = NTFS_I(bvi);
+ if (NInoCompressed(bni) || NInoEncrypted(bni) ||
+ NInoSparse(bni)) {
+ ntfs_error(vi->i_sb, "$BITMAP attribute is compressed and/or "
+ "encrypted and/or sparse.");
+ goto iput_unm_err_out;
+ }
+ /* Consistency check bitmap size vs. index allocation size. */
+ bvi_size = i_size_read(bvi);
+ if ((bvi_size << 3) < (vi->i_size >> ni->itype.index.block_size_bits)) {
+ ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) for "
+ "index allocation (0x%llx).", bvi_size << 3,
+ vi->i_size);
+ goto iput_unm_err_out;
+ }
+ iput(bvi);
+skip_large_index_stuff:
+ /* Setup the operations for this index inode. */
+ vi->i_op = NULL;
+ vi->i_fop = NULL;
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
+ vi->i_blocks = ni->allocated_size >> 9;
+ /*
+ * Make sure the base inode doesn't go away and attach it to the
+ * index inode.
+ */
+ igrab(base_vi);
+ ni->ext.base_ntfs_ino = base_ni;
+ ni->nr_extents = -1;
+
+ ntfs_debug("Done.");
+ return 0;
+iput_unm_err_out:
+ iput(bvi);
+unm_err_out:
+ if (!err)
+ err = -EIO;
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+err_out:
+ ntfs_error(vi->i_sb, "Failed with error code %i while reading index "
+ "inode (mft_no 0x%lx, name_len %i.", err, vi->i_ino,
+ ni->name_len);
+ make_bad_inode(vi);
+ if (err != -EOPNOTSUPP && err != -ENOMEM)
+ NVolSetErrors(vol);
+ return err;
+}
+
+/*
+ * The MFT inode has special locking, so teach the lock validator
+ * about this by splitting off the locking rules of the MFT from
+ * the locking rules of other inodes. The MFT inode can never be
+ * accessed from the VFS side (or even internally), only by the
+ * map_mft functions.
+ */
+static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key;
+
+/**
+ * ntfs_read_inode_mount - special read_inode for mount time use only
+ * @vi: inode to read
+ *
+ * Read inode FILE_MFT at mount time, only called with super_block lock
+ * held from within the read_super() code path.
+ *
+ * This function exists because when it is called the page cache for $MFT/$DATA
+ * is not initialized and hence we cannot get at the contents of mft records
+ * by calling map_mft_record*().
+ *
+ * Further it needs to cope with the circular references problem, i.e. cannot
+ * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because
+ * we do not know where the other extent mft records are yet and again, because
+ * we cannot call map_mft_record*() yet. Obviously this applies only when an
+ * attribute list is actually present in $MFT inode.
+ *
+ * We solve these problems by starting with the $DATA attribute before anything
+ * else and iterating using ntfs_attr_lookup($DATA) over all extents. As each
+ * extent is found, we ntfs_mapping_pairs_decompress() including the implied
+ * ntfs_runlists_merge(). Each step of the iteration necessarily provides
+ * sufficient information for the next step to complete.
+ *
+ * This should work but there are two possible pit falls (see inline comments
* below), but only time will tell if they are real pits or just smoke...
*/
int ntfs_read_inode_mount(struct inode *vi)
struct buffer_head *bh;
ntfs_inode *ni;
MFT_RECORD *m = NULL;
- ATTR_RECORD *attr;
- attr_search_context *ctx;
+ ATTR_RECORD *a;
+ ntfs_attr_search_ctx *ctx;
unsigned int i, nr_blocks;
int err;
/* Setup the data attribute. It is special as it is mst protected. */
NInoSetNonResident(ni);
NInoSetMstProtected(ni);
+ NInoSetSparseDisabled(ni);
ni->type = AT_DATA;
ni->name = NULL;
ni->name_len = 0;
-
/*
* This sets up our little cheat allowing us to reuse the async read io
* completion handler for directories.
vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
/* Provides readpage() and sync_page() for map_mft_record(). */
- vi->i_mapping->a_ops = &ntfs_mft_aops;
+ vi->i_mapping->a_ops = &ntfs_mst_aops;
- ctx = get_attr_search_ctx(ni, m);
+ ctx = ntfs_attr_get_search_ctx(ni, m);
if (!ctx) {
err = -ENOMEM;
goto err_out;
}
/* Find the attribute list attribute if present. */
- if (lookup_attr(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx)) {
+ err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
+ if (err) {
+ if (unlikely(err != -ENOENT)) {
+ ntfs_error(sb, "Failed to lookup attribute list "
+ "attribute. You should run chkdsk.");
+ goto put_err_out;
+ }
+ } else /* if (!err) */ {
ATTR_LIST_ENTRY *al_entry, *next_al_entry;
u8 *al_end;
+ static const char *es = " Not allowed. $MFT is corrupt. "
+ "You should run chkdsk.";
ntfs_debug("Attribute list attribute found in $MFT.");
NInoSetAttrList(ni);
- if (ctx->attr->flags & ATTR_IS_ENCRYPTED ||
- ctx->attr->flags & ATTR_COMPRESSION_MASK ||
- ctx->attr->flags & ATTR_IS_SPARSE) {
+ a = ctx->attr;
+ if (a->flags & ATTR_COMPRESSION_MASK) {
ntfs_error(sb, "Attribute list attribute is "
- "compressed/encrypted/sparse. Not "
- "allowed. $MFT is corrupt. You should "
- "run chkdsk.");
+ "compressed.%s", es);
goto put_err_out;
}
+ if (a->flags & ATTR_IS_ENCRYPTED ||
+ a->flags & ATTR_IS_SPARSE) {
+ if (a->non_resident) {
+ ntfs_error(sb, "Non-resident attribute list "
+ "attribute is encrypted/"
+ "sparse.%s", es);
+ goto put_err_out;
+ }
+ ntfs_warning(sb, "Resident attribute list attribute "
+ "in $MFT system file is marked "
+ "encrypted/sparse which is not true. "
+ "However, Windows allows this and "
+ "chkdsk does not detect or correct it "
+ "so we will just ignore the invalid "
+ "flags and pretend they are not set.");
+ }
/* Now allocate memory for the attribute list. */
- ni->attr_list_size = (u32)attribute_value_length(ctx->attr);
+ ni->attr_list_size = (u32)ntfs_attr_size(a);
ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
if (!ni->attr_list) {
ntfs_error(sb, "Not enough memory to allocate buffer "
"for attribute list.");
goto put_err_out;
}
- if (ctx->attr->non_resident) {
+ if (a->non_resident) {
NInoSetAttrListNonResident(ni);
- if (ctx->attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(sb, "Attribute list has non zero "
"lowest_vcn. $MFT is corrupt. "
"You should run chkdsk.");
goto put_err_out;
}
- /* Setup the run list. */
- ni->attr_list_rl.rl = decompress_mapping_pairs(vol,
- ctx->attr, NULL);
+ /* Setup the runlist. */
+ ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
+ a, NULL);
if (IS_ERR(ni->attr_list_rl.rl)) {
err = PTR_ERR(ni->attr_list_rl.rl);
ni->attr_list_rl.rl = NULL;
/* Now load the attribute list. */
if ((err = load_attribute_list(vol, &ni->attr_list_rl,
ni->attr_list, ni->attr_list_size,
- sle64_to_cpu(ctx->attr->data.
+ sle64_to_cpu(a->data.
non_resident.initialized_size)))) {
ntfs_error(sb, "Failed to load attribute list "
"attribute with error code %i.",
goto put_err_out;
}
} else /* if (!ctx.attr->non_resident) */ {
- if ((u8*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset) +
+ if ((u8*)a + le16_to_cpu(
+ a->data.resident.value_offset) +
le32_to_cpu(
- ctx->attr->data.resident.value_length) >
+ a->data.resident.value_length) >
(u8*)ctx->mrec + vol->mft_record_size) {
ntfs_error(sb, "Corrupt attribute list "
"attribute.");
goto put_err_out;
}
/* Now copy the attribute list. */
- memcpy(ni->attr_list, (u8*)ctx->attr + le16_to_cpu(
- ctx->attr->data.resident.value_offset),
+ memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
+ a->data.resident.value_offset),
le32_to_cpu(
- ctx->attr->data.resident.value_length));
+ a->data.resident.value_length));
}
/* The attribute list is now setup in memory. */
/*
}
}
- reinit_attr_search_ctx(ctx);
+ ntfs_attr_reinit_search_ctx(ctx);
/* Now load all attribute extents. */
- attr = NULL;
+ a = NULL;
next_vcn = last_vcn = highest_vcn = 0;
- while (lookup_attr(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0, ctx)) {
- run_list_element *nrl;
+ while (!(err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0,
+ ctx))) {
+ runlist_element *nrl;
/* Cache the current attribute. */
- attr = ctx->attr;
+ a = ctx->attr;
/* $MFT must be non-resident. */
- if (!attr->non_resident) {
+ if (!a->non_resident) {
ntfs_error(sb, "$MFT must be non-resident but a "
"resident extent was found. $MFT is "
"corrupt. Run chkdsk.");
goto put_err_out;
}
/* $MFT must be uncompressed and unencrypted. */
- if (attr->flags & ATTR_COMPRESSION_MASK ||
- attr->flags & ATTR_IS_ENCRYPTED ||
- attr->flags & ATTR_IS_SPARSE) {
+ if (a->flags & ATTR_COMPRESSION_MASK ||
+ a->flags & ATTR_IS_ENCRYPTED ||
+ a->flags & ATTR_IS_SPARSE) {
ntfs_error(sb, "$MFT must be uncompressed, "
"non-sparse, and unencrypted but a "
"compressed/sparse/encrypted extent "
}
/*
* Decompress the mapping pairs array of this extent and merge
- * the result into the existing run list. No need for locking
+ * the result into the existing runlist. No need for locking
* as we have exclusive access to the inode at this time and we
* are a mount in progress task, too.
*/
- nrl = decompress_mapping_pairs(vol, attr, ni->run_list.rl);
+ nrl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
if (IS_ERR(nrl)) {
- ntfs_error(sb, "decompress_mapping_pairs() failed with "
- "error code %ld. $MFT is corrupt.",
- PTR_ERR(nrl));
+ ntfs_error(sb, "ntfs_mapping_pairs_decompress() "
+ "failed with error code %ld. $MFT is "
+ "corrupt.", PTR_ERR(nrl));
goto put_err_out;
}
- ni->run_list.rl = nrl;
+ ni->runlist.rl = nrl;
/* Are we in the first extent? */
if (!next_vcn) {
- u64 ll;
-
- if (attr->data.non_resident.lowest_vcn) {
+ if (a->data.non_resident.lowest_vcn) {
ntfs_error(sb, "First extent of $DATA "
"attribute has non zero "
"lowest_vcn. $MFT is corrupt. "
}
/* Get the last vcn in the $DATA attribute. */
last_vcn = sle64_to_cpu(
- attr->data.non_resident.allocated_size)
+ a->data.non_resident.allocated_size)
>> vol->cluster_size_bits;
/* Fill in the inode size. */
vi->i_size = sle64_to_cpu(
- attr->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(attr->data.
- non_resident.initialized_size);
+ a->data.non_resident.data_size);
+ ni->initialized_size = sle64_to_cpu(
+ a->data.non_resident.initialized_size);
ni->allocated_size = sle64_to_cpu(
- attr->data.non_resident.allocated_size);
- /* Set the number of mft records. */
- ll = vi->i_size >> vol->mft_record_size_bits;
+ a->data.non_resident.allocated_size);
/*
* Verify the number of mft records does not exceed
* 2^32 - 1.
*/
- if (ll >= (1ULL << 32)) {
+ if ((vi->i_size >> vol->mft_record_size_bits) >=
+ (1ULL << 32)) {
ntfs_error(sb, "$MFT is too big! Aborting.");
goto put_err_out;
}
- vol->nr_mft_records = ll;
/*
- * We have got the first extent of the run_list for
+ * We have got the first extent of the runlist for
* $MFT which means it is now relatively safe to call
* the normal ntfs_read_inode() function.
* Complete reading the inode, this will actually
"saw this message to "
"linux-ntfs-dev@lists."
"sourceforge.net");
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
/* Revert to the safe super operations. */
ntfs_free(m);
return -1;
/* No VFS initiated operations allowed for $MFT. */
vi->i_op = &ntfs_empty_inode_ops;
vi->i_fop = &ntfs_empty_file_ops;
- /* Put back our special address space operations. */
- vi->i_mapping->a_ops = &ntfs_mft_aops;
}
/* Get the lowest vcn for the next extent. */
- highest_vcn = sle64_to_cpu(attr->data.non_resident.highest_vcn);
+ highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
next_vcn = highest_vcn + 1;
/* Only one extent or error, which we catch below. */
/* Avoid endless loops due to corruption. */
if (next_vcn < sle64_to_cpu(
- attr->data.non_resident.lowest_vcn)) {
+ a->data.non_resident.lowest_vcn)) {
ntfs_error(sb, "$MFT has corrupt attribute list "
"attribute. Run chkdsk.");
goto put_err_out;
}
}
- if (!attr) {
+ if (err != -ENOENT) {
+ ntfs_error(sb, "Failed to lookup $MFT/$DATA attribute extent. "
+ "$MFT is corrupt. Run chkdsk.");
+ goto put_err_out;
+ }
+ if (!a) {
ntfs_error(sb, "$MFT/$DATA attribute not found. $MFT is "
"corrupt. Run chkdsk.");
goto put_err_out;
}
if (highest_vcn && highest_vcn != last_vcn - 1) {
- ntfs_error(sb, "Failed to load the complete run list "
- "for $MFT/$DATA. Driver bug or "
- "corrupt $MFT. Run chkdsk.");
+ ntfs_error(sb, "Failed to load the complete runlist for "
+ "$MFT/$DATA. Driver bug or corrupt $MFT. "
+ "Run chkdsk.");
ntfs_debug("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx",
(unsigned long long)highest_vcn,
(unsigned long long)last_vcn - 1);
goto put_err_out;
}
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
ntfs_debug("Done.");
ntfs_free(m);
+
+ /*
+ * Split the locking rules of the MFT inode from the
+ * locking rules of other inodes:
+ */
+ lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key);
+ lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key);
+
return 0;
em_put_err_out:
ntfs_error(sb, "Couldn't find first extent of $DATA attribute in "
"attribute list. $MFT is corrupt. Run chkdsk.");
put_err_out:
- put_attr_search_ctx(ctx);
+ ntfs_attr_put_search_ctx(ctx);
err_out:
ntfs_error(sb, "Failed. Marking inode as bad.");
make_bad_inode(vi);
return -1;
}
-/**
- * ntfs_put_inode - handler for when the inode reference count is decremented
- * @vi: vfs inode
- *
- * The VFS calls ntfs_put_inode() every time the inode reference count (i_count)
- * is about to be decremented (but before the decrement itself.
- *
- * If the inode @vi is a directory with a single reference, we need to put the
- * attribute inode for the directory index bitmap, if it is present, otherwise
- * the directory inode would remain pinned for ever (or rather until umount()
- * time.
- */
-void ntfs_put_inode(struct inode *vi)
-{
- if (S_ISDIR(vi->i_mode) && (atomic_read(&vi->i_count) == 2)) {
- ntfs_inode *ni;
-
- ni = NTFS_I(vi);
- if (NInoIndexAllocPresent(ni) && ni->itype.index.bmp_ino) {
- iput(ni->itype.index.bmp_ino);
- ni->itype.index.bmp_ino = NULL;
- }
- }
- return;
-}
-
-void __ntfs_clear_inode(ntfs_inode *ni)
+static void __ntfs_clear_inode(ntfs_inode *ni)
{
/* Free all alocated memory. */
- down_write(&ni->run_list.lock);
- if (ni->run_list.rl) {
- ntfs_free(ni->run_list.rl);
- ni->run_list.rl = NULL;
+ down_write(&ni->runlist.lock);
+ if (ni->runlist.rl) {
+ ntfs_free(ni->runlist.rl);
+ ni->runlist.rl = NULL;
}
- up_write(&ni->run_list.lock);
+ up_write(&ni->runlist.lock);
if (ni->attr_list) {
ntfs_free(ni->attr_list);
#ifdef NTFS_RW
if (NInoDirty(ni)) {
- BOOL was_bad = (is_bad_inode(vi));
+ bool was_bad = (is_bad_inode(vi));
/* Committing the inode also commits all extent inodes. */
ntfs_commit_inode(vi);
seq_printf(sf, ",case_sensitive");
if (NVolShowSystemFiles(vol))
seq_printf(sf, ",show_sys_files");
+ if (!NVolSparseEnabled(vol))
+ seq_printf(sf, ",disable_sparse");
for (i = 0; on_errors_arr[i].val; i++) {
if (on_errors_arr[i].val & vol->on_errors)
seq_printf(sf, ",errors=%s", on_errors_arr[i].str);
#ifdef NTFS_RW
+static const char *es = " Leaving inconsistent metadata. Unmount and run "
+ "chkdsk.";
+
/**
* ntfs_truncate - called when the i_size of an ntfs inode is changed
* @vi: inode for which the i_size was changed
*
- * We don't support i_size changes yet.
+ * We only support i_size changes for normal files at present, i.e. not
+ * compressed and not encrypted. This is enforced in ntfs_setattr(), see
+ * below.
*
- * Called with ->i_sem held.
+ * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and
+ * that the change is allowed.
+ *
+ * This implies for us that @vi is a file inode rather than a directory, index,
+ * or attribute inode as well as that @vi is a base inode.
+ *
+ * Returns 0 on success or -errno on error.
+ *
+ * Called with ->i_mutex held. In all but one case ->i_alloc_sem is held for
+ * writing. The only case in the kernel where ->i_alloc_sem is not held is
+ * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called
+ * with the current i_size as the offset. The analogous place in NTFS is in
+ * fs/ntfs/file.c::ntfs_file_buffered_write() where we call vmtruncate() again
+ * without holding ->i_alloc_sem.
*/
-void ntfs_truncate(struct inode *vi)
+int ntfs_truncate(struct inode *vi)
{
- // TODO: Implement...
- ntfs_warning(vi->i_sb, "Eeek: i_size may have changed! If you see "
- "this right after a message from "
- "ntfs_{prepare,commit}_{,nonresident_}write() then "
- "just ignore it. Otherwise it is bad news.");
- // TODO: reset i_size now!
- return;
+ s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size;
+ VCN highest_vcn;
+ unsigned long flags;
+ ntfs_inode *base_ni, *ni = NTFS_I(vi);
+ ntfs_volume *vol = ni->vol;
+ ntfs_attr_search_ctx *ctx;
+ MFT_RECORD *m;
+ ATTR_RECORD *a;
+ const char *te = " Leaving file length out of sync with i_size.";
+ int err, mp_size, size_change, alloc_change;
+ u32 attr_len;
+
+ ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+ BUG_ON(NInoAttr(ni));
+ BUG_ON(S_ISDIR(vi->i_mode));
+ BUG_ON(NInoMstProtected(ni));
+ BUG_ON(ni->nr_extents < 0);
+retry_truncate:
+ /*
+ * Lock the runlist for writing and map the mft record to ensure it is
+ * safe to mess with the attribute runlist and sizes.
+ */
+ down_write(&ni->runlist.lock);
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx "
+ "(error code %d).%s", vi->i_ino, err, te);
+ ctx = NULL;
+ m = NULL;
+ goto old_bad_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ ntfs_error(vi->i_sb, "Failed to allocate a search context for "
+ "inode 0x%lx (not enough memory).%s",
+ vi->i_ino, te);
+ err = -ENOMEM;
+ goto old_bad_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT) {
+ ntfs_error(vi->i_sb, "Open attribute is missing from "
+ "mft record. Inode 0x%lx is corrupt. "
+ "Run chkdsk.%s", vi->i_ino, te);
+ err = -EIO;
+ } else
+ ntfs_error(vi->i_sb, "Failed to lookup attribute in "
+ "inode 0x%lx (error code %d).%s",
+ vi->i_ino, err, te);
+ goto old_bad_out;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ /*
+ * The i_size of the vfs inode is the new size for the attribute value.
+ */
+ new_size = i_size_read(vi);
+ /* The current size of the attribute value is the old size. */
+ old_size = ntfs_attr_size(a);
+ /* Calculate the new allocated size. */
+ if (NInoNonResident(ni))
+ new_alloc_size = (new_size + vol->cluster_size - 1) &
+ ~(s64)vol->cluster_size_mask;
+ else
+ new_alloc_size = (new_size + 7) & ~7;
+ /* The current allocated size is the old allocated size. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ old_alloc_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ /*
+ * The change in the file size. This will be 0 if no change, >0 if the
+ * size is growing, and <0 if the size is shrinking.
+ */
+ size_change = -1;
+ if (new_size - old_size >= 0) {
+ size_change = 1;
+ if (new_size == old_size)
+ size_change = 0;
+ }
+ /* As above for the allocated size. */
+ alloc_change = -1;
+ if (new_alloc_size - old_alloc_size >= 0) {
+ alloc_change = 1;
+ if (new_alloc_size == old_alloc_size)
+ alloc_change = 0;
+ }
+ /*
+ * If neither the size nor the allocation are being changed there is
+ * nothing to do.
+ */
+ if (!size_change && !alloc_change)
+ goto unm_done;
+ /* If the size is changing, check if new size is allowed in $AttrDef. */
+ if (size_change) {
+ err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
+ if (unlikely(err)) {
+ if (err == -ERANGE) {
+ ntfs_error(vol->sb, "Truncate would cause the "
+ "inode 0x%lx to %simum size "
+ "for its attribute type "
+ "(0x%x). Aborting truncate.",
+ vi->i_ino,
+ new_size > old_size ? "exceed "
+ "the max" : "go under the min",
+ le32_to_cpu(ni->type));
+ err = -EFBIG;
+ } else {
+ ntfs_error(vol->sb, "Inode 0x%lx has unknown "
+ "attribute type 0x%x. "
+ "Aborting truncate.",
+ vi->i_ino,
+ le32_to_cpu(ni->type));
+ err = -EIO;
+ }
+ /* Reset the vfs inode size to the old size. */
+ i_size_write(vi, old_size);
+ goto err_out;
+ }
+ }
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ ntfs_warning(vi->i_sb, "Changes in inode size are not "
+ "supported yet for %s files, ignoring.",
+ NInoCompressed(ni) ? "compressed" :
+ "encrypted");
+ err = -EOPNOTSUPP;
+ goto bad_out;
+ }
+ if (a->non_resident)
+ goto do_non_resident_truncate;
+ BUG_ON(NInoNonResident(ni));
+ /* Resize the attribute record to best fit the new attribute size. */
+ if (new_size < vol->mft_record_size &&
+ !ntfs_resident_attr_value_resize(m, a, new_size)) {
+ unsigned long flags;
+
+ /* The resize succeeded! */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ write_lock_irqsave(&ni->size_lock, flags);
+ /* Update the sizes in the ntfs inode and all is done. */
+ ni->allocated_size = le32_to_cpu(a->length) -
+ le16_to_cpu(a->data.resident.value_offset);
+ /*
+ * Note ntfs_resident_attr_value_resize() has already done any
+ * necessary data clearing in the attribute record. When the
+ * file is being shrunk vmtruncate() will already have cleared
+ * the top part of the last partial page, i.e. since this is
+ * the resident case this is the page with index 0. However,
+ * when the file is being expanded, the page cache page data
+ * between the old data_size, i.e. old_size, and the new_size
+ * has not been zeroed. Fortunately, we do not need to zero it
+ * either since on one hand it will either already be zero due
+ * to both readpage and writepage clearing partial page data
+ * beyond i_size in which case there is nothing to do or in the
+ * case of the file being mmap()ped at the same time, POSIX
+ * specifies that the behaviour is unspecified thus we do not
+ * have to do anything. This means that in our implementation
+ * in the rare case that the file is mmap()ped and a write
+ * occured into the mmap()ped region just beyond the file size
+ * and writepage has not yet been called to write out the page
+ * (which would clear the area beyond the file size) and we now
+ * extend the file size to incorporate this dirty region
+ * outside the file size, a write of the page would result in
+ * this data being written to disk instead of being cleared.
+ * Given both POSIX and the Linux mmap(2) man page specify that
+ * this corner case is undefined, we choose to leave it like
+ * that as this is much simpler for us as we cannot lock the
+ * relevant page now since we are holding too many ntfs locks
+ * which would result in a lock reversal deadlock.
+ */
+ ni->initialized_size = new_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ goto unm_done;
+ }
+ /* If the above resize failed, this must be an attribute extension. */
+ BUG_ON(size_change < 0);
+ /*
+ * We have to drop all the locks so we can call
+ * ntfs_attr_make_non_resident(). This could be optimised by try-
+ * locking the first page cache page and only if that fails dropping
+ * the locks, locking the page, and redoing all the locking and
+ * lookups. While this would be a huge optimisation, it is not worth
+ * it as this is definitely a slow code path as it only ever can happen
+ * once for any given file.
+ */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ /*
+ * Not enough space in the mft record, try to make the attribute
+ * non-resident and if successful restart the truncation process.
+ */
+ err = ntfs_attr_make_non_resident(ni, old_size);
+ if (likely(!err))
+ goto retry_truncate;
+ /*
+ * Could not make non-resident. If this is due to this not being
+ * permitted for this attribute type or there not being enough space,
+ * try to make other attributes non-resident. Otherwise fail.
+ */
+ if (unlikely(err != -EPERM && err != -ENOSPC)) {
+ ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute "
+ "type 0x%x, because the conversion from "
+ "resident to non-resident attribute failed "
+ "with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err != -ENOMEM)
+ err = -EIO;
+ goto conv_err_out;
+ }
+ /* TODO: Not implemented from here, abort. */
+ if (err == -ENOSPC)
+ ntfs_error(vol->sb, "Not enough space in the mft record/on "
+ "disk for the non-resident attribute value. "
+ "This case is not implemented yet.");
+ else /* if (err == -EPERM) */
+ ntfs_error(vol->sb, "This attribute type may not be "
+ "non-resident. This case is not implemented "
+ "yet.");
+ err = -EOPNOTSUPP;
+ goto conv_err_out;
+#if 0
+ // TODO: Attempt to make other attributes non-resident.
+ if (!err)
+ goto do_resident_extend;
+ /*
+ * Both the attribute list attribute and the standard information
+ * attribute must remain in the base inode. Thus, if this is one of
+ * these attributes, we have to try to move other attributes out into
+ * extent mft records instead.
+ */
+ if (ni->type == AT_ATTRIBUTE_LIST ||
+ ni->type == AT_STANDARD_INFORMATION) {
+ // TODO: Attempt to move other attributes into extent mft
+ // records.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ goto err_out;
+ }
+ // TODO: Attempt to move this attribute to an extent mft record, but
+ // only if it is not already the only attribute in an mft record in
+ // which case there would be nothing to gain.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ /* There is nothing we can do to make enough space. )-: */
+ goto err_out;
+#endif
+do_non_resident_truncate:
+ BUG_ON(!NInoNonResident(ni));
+ if (alloc_change < 0) {
+ highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+ if (highest_vcn > 0 &&
+ old_alloc_size >> vol->cluster_size_bits >
+ highest_vcn + 1) {
+ /*
+ * This attribute has multiple extents. Not yet
+ * supported.
+ */
+ ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, "
+ "attribute type 0x%x, because the "
+ "attribute is highly fragmented (it "
+ "consists of multiple extents) and "
+ "this case is not implemented yet.",
+ vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type));
+ err = -EOPNOTSUPP;
+ goto bad_out;
+ }
+ }
+ /*
+ * If the size is shrinking, need to reduce the initialized_size and
+ * the data_size before reducing the allocation.
+ */
+ if (size_change < 0) {
+ /*
+ * Make the valid size smaller (i_size is already up-to-date).
+ */
+ write_lock_irqsave(&ni->size_lock, flags);
+ if (new_size < ni->initialized_size) {
+ ni->initialized_size = new_size;
+ a->data.non_resident.initialized_size =
+ cpu_to_sle64(new_size);
+ }
+ a->data.non_resident.data_size = cpu_to_sle64(new_size);
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ /* If the allocated size is not changing, we are done. */
+ if (!alloc_change)
+ goto unm_done;
+ /*
+ * If the size is shrinking it makes no sense for the
+ * allocation to be growing.
+ */
+ BUG_ON(alloc_change > 0);
+ } else /* if (size_change >= 0) */ {
+ /*
+ * The file size is growing or staying the same but the
+ * allocation can be shrinking, growing or staying the same.
+ */
+ if (alloc_change > 0) {
+ /*
+ * We need to extend the allocation and possibly update
+ * the data size. If we are updating the data size,
+ * since we are not touching the initialized_size we do
+ * not need to worry about the actual data on disk.
+ * And as far as the page cache is concerned, there
+ * will be no pages beyond the old data size and any
+ * partial region in the last page between the old and
+ * new data size (or the end of the page if the new
+ * data size is outside the page) does not need to be
+ * modified as explained above for the resident
+ * attribute truncate case. To do this, we simply drop
+ * the locks we hold and leave all the work to our
+ * friendly helper ntfs_attr_extend_allocation().
+ */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ err = ntfs_attr_extend_allocation(ni, new_size,
+ size_change > 0 ? new_size : -1, -1);
+ /*
+ * ntfs_attr_extend_allocation() will have done error
+ * output already.
+ */
+ goto done;
+ }
+ if (!alloc_change)
+ goto alloc_done;
+ }
+ /* alloc_change < 0 */
+ /* Free the clusters. */
+ nr_freed = ntfs_cluster_free(ni, new_alloc_size >>
+ vol->cluster_size_bits, -1, ctx);
+ m = ctx->mrec;
+ a = ctx->attr;
+ if (unlikely(nr_freed < 0)) {
+ ntfs_error(vol->sb, "Failed to release cluster(s) (error code "
+ "%lli). Unmount and run chkdsk to recover "
+ "the lost cluster(s).", (long long)nr_freed);
+ NVolSetErrors(vol);
+ nr_freed = 0;
+ }
+ /* Truncate the runlist. */
+ err = ntfs_rl_truncate_nolock(vol, &ni->runlist,
+ new_alloc_size >> vol->cluster_size_bits);
+ /*
+ * If the runlist truncation failed and/or the search context is no
+ * longer valid, we cannot resize the attribute record or build the
+ * mapping pairs array thus we mark the inode bad so that no access to
+ * the freed clusters can happen.
+ */
+ if (unlikely(err || IS_ERR(m))) {
+ ntfs_error(vol->sb, "Failed to %s (error code %li).%s",
+ IS_ERR(m) ?
+ "restore attribute search context" :
+ "truncate attribute runlist",
+ IS_ERR(m) ? PTR_ERR(m) : err, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /* Get the size for the shrunk mapping pairs array for the runlist. */
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1);
+ if (unlikely(mp_size <= 0)) {
+ ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+ "attribute type 0x%x, because determining the "
+ "size for the mapping pairs failed with error "
+ "code %i.%s", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), mp_size, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /*
+ * Shrink the attribute record for the new mapping pairs array. Note,
+ * this cannot fail since we are making the attribute smaller thus by
+ * definition there is enough space to do so.
+ */
+ attr_len = le32_to_cpu(a->length);
+ err = ntfs_attr_record_resize(m, a, mp_size +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
+ BUG_ON(err);
+ /*
+ * Generate the mapping pairs array directly into the attribute record.
+ */
+ err = ntfs_mapping_pairs_build(vol, (u8*)a +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
+ mp_size, ni->runlist.rl, 0, -1, NULL);
+ if (unlikely(err)) {
+ ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+ "attribute type 0x%x, because building the "
+ "mapping pairs failed with error code %i.%s",
+ vi->i_ino, (unsigned)le32_to_cpu(ni->type),
+ err, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /* Update the allocated/compressed size as well as the highest vcn. */
+ a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
+ vol->cluster_size_bits) - 1);
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->allocated_size = new_alloc_size;
+ a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
+ if (NInoSparse(ni) || NInoCompressed(ni)) {
+ if (nr_freed) {
+ ni->itype.compressed.size -= nr_freed <<
+ vol->cluster_size_bits;
+ BUG_ON(ni->itype.compressed.size < 0);
+ a->data.non_resident.compressed_size = cpu_to_sle64(
+ ni->itype.compressed.size);
+ vi->i_blocks = ni->itype.compressed.size >> 9;
+ }
+ } else
+ vi->i_blocks = new_alloc_size >> 9;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ /*
+ * We have shrunk the allocation. If this is a shrinking truncate we
+ * have already dealt with the initialized_size and the data_size above
+ * and we are done. If the truncate is only changing the allocation
+ * and not the data_size, we are also done. If this is an extending
+ * truncate, need to extend the data_size now which is ensured by the
+ * fact that @size_change is positive.
+ */
+alloc_done:
+ /*
+ * If the size is growing, need to update it now. If it is shrinking,
+ * we have already updated it above (before the allocation change).
+ */
+ if (size_change > 0)
+ a->data.non_resident.data_size = cpu_to_sle64(new_size);
+ /* Ensure the modified mft record is written out. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+unm_done:
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+done:
+ /* Update the mtime and ctime on the base inode. */
+ /* normally ->truncate shouldn't update ctime or mtime,
+ * but ntfs did before so it got a copy & paste version
+ * of file_update_time. one day someone should fix this
+ * for real.
+ */
+ if (!IS_NOCMTIME(VFS_I(base_ni)) && !IS_RDONLY(VFS_I(base_ni))) {
+ struct timespec now = current_fs_time(VFS_I(base_ni)->i_sb);
+ int sync_it = 0;
+
+ if (!timespec_equal(&VFS_I(base_ni)->i_mtime, &now) ||
+ !timespec_equal(&VFS_I(base_ni)->i_ctime, &now))
+ sync_it = 1;
+ VFS_I(base_ni)->i_mtime = now;
+ VFS_I(base_ni)->i_ctime = now;
+
+ if (sync_it)
+ mark_inode_dirty_sync(VFS_I(base_ni));
+ }
+
+ if (likely(!err)) {
+ NInoClearTruncateFailed(ni);
+ ntfs_debug("Done.");
+ }
+ return err;
+old_bad_out:
+ old_size = -1;
+bad_out:
+ if (err != -ENOMEM && err != -EOPNOTSUPP)
+ NVolSetErrors(vol);
+ if (err != -EOPNOTSUPP)
+ NInoSetTruncateFailed(ni);
+ else if (old_size >= 0)
+ i_size_write(vi, old_size);
+err_out:
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+out:
+ ntfs_debug("Failed. Returning error code %i.", err);
+ return err;
+conv_err_out:
+ if (err != -ENOMEM && err != -EOPNOTSUPP)
+ NVolSetErrors(vol);
+ if (err != -EOPNOTSUPP)
+ NInoSetTruncateFailed(ni);
+ else
+ i_size_write(vi, old_size);
+ goto out;
+}
+
+/**
+ * ntfs_truncate_vfs - wrapper for ntfs_truncate() that has no return value
+ * @vi: inode for which the i_size was changed
+ *
+ * Wrapper for ntfs_truncate() that has no return value.
+ *
+ * See ntfs_truncate() description above for details.
+ */
+void ntfs_truncate_vfs(struct inode *vi) {
+ ntfs_truncate(vi);
}
/**
* @attr: structure describing the attributes and the changes
*
* We have to trap VFS attempts to truncate the file described by @dentry as
- * soon as possible, because we do not implement changes in i_size yet. So we
+ * soon as possible, because we do not implement changes in i_size yet. So we
* abort all i_size changes here.
*
- * Called with ->i_sem held.
+ * We also abort all changes of user, group, and mode as we do not implement
+ * the NTFS ACLs yet.
+ *
+ * Called with ->i_mutex held. For the ATTR_SIZE (i.e. ->truncate) case, also
+ * called with ->i_alloc_sem held for writing.
*
* Basically this is a copy of generic notify_change() and inode_setattr()
* functionality, except we intercept and abort changes in i_size.
*/
int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
{
- struct inode *vi;
+ struct inode *vi = dentry->d_inode;
int err;
unsigned int ia_valid = attr->ia_valid;
- vi = dentry->d_inode;
-
err = inode_change_ok(vi, attr);
if (err)
- return err;
-
- if ((ia_valid & ATTR_UID && attr->ia_uid != vi->i_uid) ||
- (ia_valid & ATTR_GID && attr->ia_gid != vi->i_gid)) {
- err = DQUOT_TRANSFER(vi, attr) ? -EDQUOT : 0;
- if (err)
- return err;
+ goto out;
+ /* We do not support NTFS ACLs yet. */
+ if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
+ ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
+ "supported yet, ignoring.");
+ err = -EOPNOTSUPP;
+ goto out;
}
-
- lock_kernel();
-
if (ia_valid & ATTR_SIZE) {
- ntfs_error(vi->i_sb, "Changes in i_size are not supported "
- "yet. Sorry.");
- // TODO: Implement...
- // err = vmtruncate(vi, attr->ia_size);
- err = -EOPNOTSUPP;
- if (err)
- goto trunc_err;
+ if (attr->ia_size != i_size_read(vi)) {
+ ntfs_inode *ni = NTFS_I(vi);
+ /*
+ * FIXME: For now we do not support resizing of
+ * compressed or encrypted files yet.
+ */
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ ntfs_warning(vi->i_sb, "Changes in inode size "
+ "are not supported yet for "
+ "%s files, ignoring.",
+ NInoCompressed(ni) ?
+ "compressed" : "encrypted");
+ err = -EOPNOTSUPP;
+ } else
+ err = vmtruncate(vi, attr->ia_size);
+ if (err || ia_valid == ATTR_SIZE)
+ goto out;
+ } else {
+ /*
+ * We skipped the truncate but must still update
+ * timestamps.
+ */
+ ia_valid |= ATTR_MTIME | ATTR_CTIME;
+ }
}
-
- if (ia_valid & ATTR_UID)
- vi->i_uid = attr->ia_uid;
- if (ia_valid & ATTR_GID)
- vi->i_gid = attr->ia_gid;
if (ia_valid & ATTR_ATIME)
- vi->i_atime = attr->ia_atime;
+ vi->i_atime = timespec_trunc(attr->ia_atime,
+ vi->i_sb->s_time_gran);
if (ia_valid & ATTR_MTIME)
- vi->i_mtime = attr->ia_mtime;
+ vi->i_mtime = timespec_trunc(attr->ia_mtime,
+ vi->i_sb->s_time_gran);
if (ia_valid & ATTR_CTIME)
- vi->i_ctime = attr->ia_ctime;
- if (ia_valid & ATTR_MODE) {
- vi->i_mode = attr->ia_mode;
- if (!in_group_p(vi->i_gid) &&
- !capable(CAP_FSETID))
- vi->i_mode &= ~S_ISGID;
- }
+ vi->i_ctime = timespec_trunc(attr->ia_ctime,
+ vi->i_sb->s_time_gran);
mark_inode_dirty(vi);
-
-trunc_err:
-
- unlock_kernel();
-
+out:
return err;
}
* marking the page (and in this case mft record) dirty but we do not implement
* this yet as write_mft_record() largely ignores the @sync parameter and
* always performs synchronous writes.
+ *
+ * Return 0 on success and -errno on error.
*/
-void ntfs_write_inode(struct inode *vi, int sync)
+int ntfs_write_inode(struct inode *vi, int sync)
{
+ sle64 nt;
ntfs_inode *ni = NTFS_I(vi);
-#if 0
- attr_search_context *ctx;
-#endif
+ ntfs_attr_search_ctx *ctx;
MFT_RECORD *m;
+ STANDARD_INFORMATION *si;
int err = 0;
+ bool modified = false;
ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "",
vi->i_ino);
/*
* Dirty attribute inodes are written via their real inodes so just
- * clean them here. TODO: Take care of access time updates.
+ * clean them here. Access time updates are taken care off when the
+ * real inode is written.
*/
if (NInoAttr(ni)) {
NInoClearDirty(ni);
- return;
+ ntfs_debug("Done.");
+ return 0;
}
/* Map, pin, and lock the mft record belonging to the inode. */
m = map_mft_record(ni);
- if (unlikely(IS_ERR(m))) {
+ if (IS_ERR(m)) {
err = PTR_ERR(m);
goto err_out;
}
-#if 0
- /* Obtain the standard information attribute. */
- ctx = get_attr_search_ctx(ni, m);
+ /* Update the access times in the standard information attribute. */
+ ctx = ntfs_attr_get_search_ctx(ni, m);
if (unlikely(!ctx)) {
err = -ENOMEM;
goto unm_err_out;
}
- if (unlikely(!lookup_attr(AT_STANDARD_INFORMATION, NULL, 0,
- IGNORE_CASE, 0, NULL, 0, ctx))) {
- put_attr_search_ctx(ctx);
- err = -ENOENT;
+ err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ ntfs_attr_put_search_ctx(ctx);
goto unm_err_out;
}
- // TODO: Update the access times in the standard information attribute
- // which is now in ctx->attr.
- // - Probably want to have use sops->dirty_inode() to set a flag that
- // we need to update the times here rather than having to blindly do
- // it every time. Or even don't do it here at all and do it in
- // sops->dirty_inode() instead. Problem with this would be that
- // sops->dirty_inode() must be atomic under certain circumstances
- // and mapping mft records and such like is not atomic.
- // - For atime updates also need to check whether they are enabled in
- // the superblock flags.
- ntfs_warning(vi->i_sb, "Access time updates not implement yet.");
+ si = (STANDARD_INFORMATION*)((u8*)ctx->attr +
+ le16_to_cpu(ctx->attr->data.resident.value_offset));
+ /* Update the access times if they have changed. */
+ nt = utc2ntfs(vi->i_mtime);
+ if (si->last_data_change_time != nt) {
+ ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, "
+ "new = 0x%llx", vi->i_ino, (long long)
+ sle64_to_cpu(si->last_data_change_time),
+ (long long)sle64_to_cpu(nt));
+ si->last_data_change_time = nt;
+ modified = true;
+ }
+ nt = utc2ntfs(vi->i_ctime);
+ if (si->last_mft_change_time != nt) {
+ ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, "
+ "new = 0x%llx", vi->i_ino, (long long)
+ sle64_to_cpu(si->last_mft_change_time),
+ (long long)sle64_to_cpu(nt));
+ si->last_mft_change_time = nt;
+ modified = true;
+ }
+ nt = utc2ntfs(vi->i_atime);
+ if (si->last_access_time != nt) {
+ ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, "
+ "new = 0x%llx", vi->i_ino,
+ (long long)sle64_to_cpu(si->last_access_time),
+ (long long)sle64_to_cpu(nt));
+ si->last_access_time = nt;
+ modified = true;
+ }
/*
- * We just modified the mft record containing the standard information
- * attribute. So need to mark the mft record dirty, too, but we do it
- * manually so that mark_inode_dirty() is not called again.
- * TODO: Only do this if there was a change in any of the times!
+ * If we just modified the standard information attribute we need to
+ * mark the mft record it is in dirty. We do this manually so that
+ * mark_inode_dirty() is not called which would redirty the inode and
+ * hence result in an infinite loop of trying to write the inode.
+ * There is no need to mark the base inode nor the base mft record
+ * dirty, since we are going to write this mft record below in any case
+ * and the base mft record may actually not have been modified so it
+ * might not need to be written out.
+ * NOTE: It is not a problem when the inode for $MFT itself is being
+ * written out as mark_ntfs_record_dirty() will only set I_DIRTY_PAGES
+ * on the $MFT inode and hence ntfs_write_inode() will not be
+ * re-invoked because of it which in turn is ok since the dirtied mft
+ * record will be cleaned and written out to disk below, i.e. before
+ * this function returns.
*/
- if (!NInoTestSetDirty(ctx->ntfs_ino))
- __set_page_dirty_nobuffers(ctx->ntfs_ino->page);
- put_attr_search_ctx(ctx);
-#endif
- /* Write this base mft record. */
+ if (modified) {
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ if (!NInoTestSetDirty(ctx->ntfs_ino))
+ mark_ntfs_record_dirty(ctx->ntfs_ino->page,
+ ctx->ntfs_ino->page_ofs);
+ }
+ ntfs_attr_put_search_ctx(ctx);
+ /* Now the access times are updated, write the base mft record. */
if (NInoDirty(ni))
err = write_mft_record(ni, m, sync);
/* Write all attached extent mft records. */
- down(&ni->extent_lock);
+ mutex_lock(&ni->extent_lock);
if (ni->nr_extents > 0) {
ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
int i;
MFT_RECORD *tm = map_mft_record(tni);
int ret;
- if (unlikely(IS_ERR(tm))) {
+ if (IS_ERR(tm)) {
if (!err || err == -ENOMEM)
err = PTR_ERR(tm);
continue;
}
}
}
- up(&ni->extent_lock);
+ mutex_unlock(&ni->extent_lock);
unmap_mft_record(ni);
if (unlikely(err))
goto err_out;
ntfs_debug("Done.");
- return;
-#if 0
+ return 0;
unm_err_out:
unmap_mft_record(ni);
-#endif
err_out:
if (err == -ENOMEM) {
ntfs_warning(vi->i_sb, "Not enough memory to write inode. "
"retries later.");
mark_inode_dirty(vi);
} else {
- ntfs_error(vi->i_sb, "Failed (error code %i): Marking inode "
- "as bad. You should run chkdsk.", -err);
- make_bad_inode(vi);
+ ntfs_error(vi->i_sb, "Failed (error %i): Run chkdsk.", -err);
+ NVolSetErrors(ni->vol);
}
- return;
+ return err;
}
#endif /* NTFS_RW */
git://git.onelab.eu / linux-2.6.git / blobdiff