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-rw-r--r--fs/ntfs/inode.c162
1 files changed, 58 insertions, 104 deletions
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 247989891b4..f47af5e6e23 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -1,7 +1,7 @@
/**
* inode.c - NTFS kernel inode handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2001-2006 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
@@ -27,7 +27,8 @@
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
+#include <linux/log2.h>
+#include <linux/aio.h>
#include "aops.h"
#include "attrib.h"
@@ -35,7 +36,6 @@
#include "dir.h"
#include "debug.h"
#include "inode.h"
-#include "attrib.h"
#include "lcnalloc.h"
#include "malloc.h"
#include "mft.h"
@@ -55,7 +55,7 @@
*
* Return 1 if the attributes match and 0 if not.
*
- * NOTE: This function runs with the inode_lock spin lock held so it is not
+ * NOTE: This function runs with the inode_hash_lock spin lock held so it is not
* allowed to sleep.
*/
int ntfs_test_inode(struct inode *vi, ntfs_attr *na)
@@ -95,11 +95,11 @@ int ntfs_test_inode(struct inode *vi, ntfs_attr *na)
* 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.
*
- * NOTE: This function runs with the inode_lock spin lock held so it is not
+ * NOTE: This function runs with the inode->i_lock spin lock held so it is not
* allowed to sleep. (Hence the GFP_ATOMIC allocation.)
*/
static int ntfs_init_locked_inode(struct inode *vi, ntfs_attr *na)
@@ -141,7 +141,7 @@ static int ntfs_init_locked_inode(struct inode *vi, ntfs_attr *na)
if (!ni->name)
return -ENOMEM;
memcpy(ni->name, na->name, i);
- ni->name[i] = 0;
+ ni->name[na->name_len] = 0;
}
return 0;
}
@@ -171,8 +171,8 @@ static int ntfs_read_locked_index_inode(struct inode *base_vi,
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;
@@ -229,8 +229,8 @@ 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);
@@ -287,8 +287,8 @@ struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
u32 name_len)
{
struct inode *vi;
- ntfs_attr na;
int err;
+ ntfs_attr na;
na.mft_no = base_vi->i_ino;
na.type = AT_INDEX_ALLOCATION;
@@ -333,6 +333,12 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb)
return NULL;
}
+static void ntfs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
+}
+
void ntfs_destroy_big_inode(struct inode *inode)
{
ntfs_inode *ni = NTFS_I(inode);
@@ -341,7 +347,7 @@ void ntfs_destroy_big_inode(struct inode *inode)
BUG_ON(ni->page);
if (!atomic_dec_and_test(&ni->count))
BUG();
- kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
+ call_rcu(&inode->i_rcu, ntfs_i_callback);
}
static inline ntfs_inode *ntfs_alloc_extent_inode(void)
@@ -402,7 +408,6 @@ void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
ntfs_init_runlist(&ni->attr_list_rl);
lockdep_set_class(&ni->attr_list_rl.lock,
&attr_list_rl_lock_class);
- ni->itype.index.bmp_ino = NULL;
ni->itype.index.block_size = 0;
ni->itype.index.vcn_size = 0;
ni->itype.index.collation_rule = 0;
@@ -532,7 +537,7 @@ err_corrupt_attr:
* the ntfs inode.
*
* Q: What locks are held when the function is called?
- * A: i_state has I_LOCK set, hence the inode is locked, also
+ * A: i_state has I_NEW 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()
* is allowed to write to them. We should of course be honouring them but
@@ -546,6 +551,7 @@ 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;
@@ -606,7 +612,7 @@ static int ntfs_read_locked_inode(struct inode *vi)
* might be tricky due to vfs interactions. Need to think about this
* some more when implementing the unlink command.
*/
- vi->i_nlink = le16_to_cpu(m->link_count);
+ set_nlink(vi, le16_to_cpu(m->link_count));
/*
* FIXME: Reparse points can have the directory bit set even though
* they would be S_IFLNK. Need to deal with this further below when we
@@ -616,7 +622,7 @@ static int ntfs_read_locked_inode(struct inode *vi)
*/
/* Everyone gets all permissions. */
vi->i_mode |= S_IRWXUGO;
- /* If read-only, noone gets write permissions. */
+ /* If read-only, no one gets write permissions. */
if (IS_RDONLY(vi))
vi->i_mode &= ~S_IWUGO;
if (m->flags & MFT_RECORD_IS_DIRECTORY) {
@@ -628,7 +634,7 @@ static int ntfs_read_locked_inode(struct inode *vi)
vi->i_mode &= ~vol->dmask;
/* Things break without this kludge! */
if (vi->i_nlink > 1)
- vi->i_nlink = 1;
+ set_nlink(vi, 1);
} else {
vi->i_mode |= S_IFREG;
/* Apply the file permissions mask set in the mount options. */
@@ -780,7 +786,6 @@ skip_attr_list_load:
*/
if (S_ISDIR(vi->i_mode)) {
loff_t bvi_size;
- struct inode *bvi;
ntfs_inode *bni;
INDEX_ROOT *ir;
u8 *ir_end, *index_end;
@@ -985,13 +990,12 @@ skip_attr_list_load:
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. */
bvi_size = i_size_read(bvi);
@@ -1000,8 +1004,10 @@ skip_attr_list_load:
ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
"for index allocation (0x%llx).",
bvi_size << 3, vi->i_size);
- goto unm_err_out;
+ goto iput_unm_err_out;
}
+ /* No longer need the bitmap attribute inode. */
+ iput(bvi);
skip_large_dir_stuff:
/* Setup the operations for this inode. */
vi->i_op = &ntfs_dir_inode_ops;
@@ -1176,7 +1182,8 @@ no_data_attr_special_case:
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;
@@ -1207,7 +1214,7 @@ err_out:
* necessary fields in @vi as well as initializing the ntfs inode.
*
* Q: What locks are held when the function is called?
- * A: i_state has I_LOCK set, hence the inode is locked, also
+ * A: i_state has I_NEW 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
@@ -1235,7 +1242,7 @@ static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
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;
+ set_nlink(vi, 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;
@@ -1407,9 +1414,6 @@ static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
ni->allocated_size = sle64_to_cpu(
a->data.non_resident.allocated_size);
}
- /* Setup the operations for this attribute inode. */
- vi->i_op = NULL;
- vi->i_fop = NULL;
if (NInoMstProtected(ni))
vi->i_mapping->a_ops = &ntfs_mst_aops;
else
@@ -1477,7 +1481,7 @@ err_out:
* normal directory inodes.
*
* Q: What locks are held when the function is called?
- * A: i_state has I_LOCK set, hence the inode is locked, also
+ * A: i_state has I_NEW 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
@@ -1504,7 +1508,7 @@ static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
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;
+ set_nlink(vi, 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;
@@ -1574,7 +1578,7 @@ static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
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)) {
+ if (!is_power_of_2(ni->itype.index.block_size)) {
ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
"two.", ni->itype.index.block_size);
goto unm_err_out;
@@ -1697,11 +1701,9 @@ static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
vi->i_size);
goto iput_unm_err_out;
}
- ni->itype.index.bmp_ino = bvi;
+ 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;
/*
@@ -1714,7 +1716,6 @@ skip_large_index_stuff:
ntfs_debug("Done.");
return 0;
-
iput_unm_err_out:
iput(bvi);
unm_err_out:
@@ -1980,8 +1981,7 @@ int ntfs_read_inode_mount(struct inode *vi)
goto em_put_err_out;
next_al_entry = (ATTR_LIST_ENTRY*)((u8*)al_entry +
le16_to_cpu(al_entry->length));
- if (le32_to_cpu(al_entry->type) >
- const_le32_to_cpu(AT_DATA))
+ if (le32_to_cpu(al_entry->type) > le32_to_cpu(AT_DATA))
goto em_put_err_out;
if (AT_DATA != al_entry->type)
continue;
@@ -2123,7 +2123,8 @@ int ntfs_read_inode_mount(struct inode *vi)
* ntfs_read_inode() will have set up the default ones.
*/
/* Set uid and gid to root. */
- vi->i_uid = vi->i_gid = 0;
+ vi->i_uid = GLOBAL_ROOT_UID;
+ vi->i_gid = GLOBAL_ROOT_GID;
/* Regular file. No access for anyone. */
vi->i_mode = S_IFREG;
/* No VFS initiated operations allowed for $MFT. */
@@ -2191,37 +2192,6 @@ err_out:
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 two references, one of which is being
- * dropped, 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.
- */
-void ntfs_put_inode(struct inode *vi)
-{
- if (S_ISDIR(vi->i_mode) && atomic_read(&vi->i_count) == 2) {
- ntfs_inode *ni = NTFS_I(vi);
- if (NInoIndexAllocPresent(ni)) {
- struct inode *bvi = NULL;
- mutex_lock(&vi->i_mutex);
- if (atomic_read(&vi->i_count) == 2) {
- bvi = ni->itype.index.bmp_ino;
- if (bvi)
- ni->itype.index.bmp_ino = NULL;
- }
- mutex_unlock(&vi->i_mutex);
- if (bvi)
- iput(bvi);
- }
- }
-}
-
static void __ntfs_clear_inode(ntfs_inode *ni)
{
/* Free all alocated memory. */
@@ -2274,7 +2244,7 @@ void ntfs_clear_extent_inode(ntfs_inode *ni)
}
/**
- * ntfs_clear_big_inode - clean up the ntfs specific part of an inode
+ * ntfs_evict_big_inode - clean up the ntfs specific part of an inode
* @vi: vfs inode pending annihilation
*
* When the VFS is going to remove an inode from memory, ntfs_clear_big_inode()
@@ -2283,22 +2253,13 @@ void ntfs_clear_extent_inode(ntfs_inode *ni)
*
* If the MFT record is dirty, we commit it before doing anything else.
*/
-void ntfs_clear_big_inode(struct inode *vi)
+void ntfs_evict_big_inode(struct inode *vi)
{
ntfs_inode *ni = NTFS_I(vi);
- /*
- * If the inode @vi is an index inode we need to put the attribute
- * inode for the index bitmap, if it is present, otherwise the index
- * inode would disappear and the attribute inode for the index bitmap
- * would no longer be referenced from anywhere and thus it would remain
- * pinned for ever.
- */
- if (NInoAttr(ni) && (ni->type == AT_INDEX_ALLOCATION) &&
- NInoIndexAllocPresent(ni) && ni->itype.index.bmp_ino) {
- iput(ni->itype.index.bmp_ino);
- ni->itype.index.bmp_ino = NULL;
- }
+ truncate_inode_pages_final(&vi->i_data);
+ clear_inode(vi);
+
#ifdef NTFS_RW
if (NInoDirty(ni)) {
bool was_bad = (is_bad_inode(vi));
@@ -2339,20 +2300,20 @@ void ntfs_clear_big_inode(struct inode *vi)
/**
* ntfs_show_options - show mount options in /proc/mounts
* @sf: seq_file in which to write our mount options
- * @mnt: vfs mount whose mount options to display
+ * @root: root of the mounted tree whose mount options to display
*
* Called by the VFS once for each mounted ntfs volume when someone reads
* /proc/mounts in order to display the NTFS specific mount options of each
- * mount. The mount options of the vfs mount @mnt are written to the seq file
+ * mount. The mount options of fs specified by @root are written to the seq file
* @sf and success is returned.
*/
-int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt)
+int ntfs_show_options(struct seq_file *sf, struct dentry *root)
{
- ntfs_volume *vol = NTFS_SB(mnt->mnt_sb);
+ ntfs_volume *vol = NTFS_SB(root->d_sb);
int i;
- seq_printf(sf, ",uid=%i", vol->uid);
- seq_printf(sf, ",gid=%i", vol->gid);
+ seq_printf(sf, ",uid=%i", from_kuid_munged(&init_user_ns, vol->uid));
+ seq_printf(sf, ",gid=%i", from_kgid_munged(&init_user_ns, vol->gid));
if (vol->fmask == vol->dmask)
seq_printf(sf, ",umask=0%o", vol->fmask);
else {
@@ -2395,12 +2356,7 @@ static const char *es = " Leaving inconsistent metadata. Unmount and run "
*
* 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.
+ * Called with ->i_mutex held.
*/
int ntfs_truncate(struct inode *vi)
{
@@ -2544,8 +2500,6 @@ retry_truncate:
/* 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);
@@ -2569,7 +2523,7 @@ retry_truncate:
* 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
+ * occurred 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
@@ -2911,9 +2865,11 @@ conv_err_out:
*
* See ntfs_truncate() description above for details.
*/
+#ifdef NTFS_RW
void ntfs_truncate_vfs(struct inode *vi) {
ntfs_truncate(vi);
}
+#endif
/**
* ntfs_setattr - called from notify_change() when an attribute is being changed
@@ -2927,11 +2883,7 @@ void ntfs_truncate_vfs(struct inode *vi) {
* 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.
+ * Called with ->i_mutex held.
*/
int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
{
@@ -2963,8 +2915,10 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
NInoCompressed(ni) ?
"compressed" : "encrypted");
err = -EOPNOTSUPP;
- } else
- err = vmtruncate(vi, attr->ia_size);
+ } else {
+ truncate_setsize(vi, attr->ia_size);
+ ntfs_truncate_vfs(vi);
+ }
if (err || ia_valid == ATTR_SIZE)
goto out;
} else {
@@ -3007,7 +2961,7 @@ out:
*
* Return 0 on success and -errno on error.
*/
-int 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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 11:19:52 +0000