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-rw-r--r--fs/ext2/Kconfig11
-rw-r--r--fs/ext2/Makefile1
-rw-r--r--fs/ext2/ext2.h10
-rw-r--r--fs/ext2/file.c44
-rw-r--r--fs/ext2/ialloc.c2
-rw-r--r--fs/ext2/inode.c38
-rw-r--r--fs/ext2/namei.c13
-rw-r--r--fs/ext2/super.c53
-rw-r--r--fs/ext2/xip.c91
-rw-r--r--fs/ext2/xip.h26
10 files changed, 98 insertions, 191 deletions
diff --git a/fs/ext2/Kconfig b/fs/ext2/Kconfig
index 14a6780fd034..c634874e12d9 100644
--- a/fs/ext2/Kconfig
+++ b/fs/ext2/Kconfig
@@ -42,14 +42,3 @@ config EXT2_FS_SECURITY
If you are not using a security module that requires using
extended attributes for file security labels, say N.
-
-config EXT2_FS_XIP
- bool "Ext2 execute in place support"
- depends on EXT2_FS && MMU
- help
- Execute in place can be used on memory-backed block devices. If you
- enable this option, you can select to mount block devices which are
- capable of this feature without using the page cache.
-
- If you do not use a block device that is capable of using this,
- or if unsure, say N.
diff --git a/fs/ext2/Makefile b/fs/ext2/Makefile
index f42af45cfd88..445b0e996a12 100644
--- a/fs/ext2/Makefile
+++ b/fs/ext2/Makefile
@@ -10,4 +10,3 @@ ext2-y := balloc.o dir.o file.o ialloc.o inode.o \
ext2-$(CONFIG_EXT2_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
ext2-$(CONFIG_EXT2_FS_POSIX_ACL) += acl.o
ext2-$(CONFIG_EXT2_FS_SECURITY) += xattr_security.o
-ext2-$(CONFIG_EXT2_FS_XIP) += xip.o
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e4279ead4a05..678f9ab08c48 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -380,10 +380,15 @@ struct ext2_inode {
#define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */
#define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */
#define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */
-#define EXT2_MOUNT_XIP 0x010000 /* Execute in place */
+#define EXT2_MOUNT_XIP 0x010000 /* Obsolete, use DAX */
#define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */
#define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */
#define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */
+#ifdef CONFIG_FS_DAX
+#define EXT2_MOUNT_DAX 0x100000 /* Direct Access */
+#else
+#define EXT2_MOUNT_DAX 0
+#endif
#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
@@ -788,11 +793,10 @@ extern int ext2_fsync(struct file *file, loff_t start, loff_t end,
int datasync);
extern const struct inode_operations ext2_file_inode_operations;
extern const struct file_operations ext2_file_operations;
-extern const struct file_operations ext2_xip_file_operations;
+extern const struct file_operations ext2_dax_file_operations;
/* inode.c */
extern const struct address_space_operations ext2_aops;
-extern const struct address_space_operations ext2_aops_xip;
extern const struct address_space_operations ext2_nobh_aops;
/* namei.c */
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 7c87b22a7228..e31701713516 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -25,6 +25,36 @@
#include "xattr.h"
#include "acl.h"
+#ifdef CONFIG_FS_DAX
+static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ return dax_fault(vma, vmf, ext2_get_block);
+}
+
+static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ return dax_mkwrite(vma, vmf, ext2_get_block);
+}
+
+static const struct vm_operations_struct ext2_dax_vm_ops = {
+ .fault = ext2_dax_fault,
+ .page_mkwrite = ext2_dax_mkwrite,
+};
+
+static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!IS_DAX(file_inode(file)))
+ return generic_file_mmap(file, vma);
+
+ file_accessed(file);
+ vma->vm_ops = &ext2_dax_vm_ops;
+ vma->vm_flags |= VM_MIXEDMAP;
+ return 0;
+}
+#else
+#define ext2_file_mmap generic_file_mmap
+#endif
+
/*
* Called when filp is released. This happens when all file descriptors
* for a single struct file are closed. Note that different open() calls
@@ -70,7 +100,7 @@ const struct file_operations ext2_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
+ .mmap = ext2_file_mmap,
.open = dquot_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,
@@ -78,16 +108,18 @@ const struct file_operations ext2_file_operations = {
.splice_write = iter_file_splice_write,
};
-#ifdef CONFIG_EXT2_FS_XIP
-const struct file_operations ext2_xip_file_operations = {
+#ifdef CONFIG_FS_DAX
+const struct file_operations ext2_dax_file_operations = {
.llseek = generic_file_llseek,
- .read = xip_file_read,
- .write = xip_file_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
- .mmap = xip_file_mmap,
+ .mmap = ext2_file_mmap,
.open = dquot_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index 7d66fb0e4cca..6c14bb8322fa 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -170,7 +170,7 @@ static void ext2_preread_inode(struct inode *inode)
struct ext2_group_desc * gdp;
struct backing_dev_info *bdi;
- bdi = inode->i_mapping->backing_dev_info;
+ bdi = inode_to_bdi(inode);
if (bdi_read_congested(bdi))
return;
if (bdi_write_congested(bdi))
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 36d35c36311d..6434bc000125 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -34,7 +34,6 @@
#include <linux/aio.h>
#include "ext2.h"
#include "acl.h"
-#include "xip.h"
#include "xattr.h"
static int __ext2_write_inode(struct inode *inode, int do_sync);
@@ -731,12 +730,14 @@ static int ext2_get_blocks(struct inode *inode,
goto cleanup;
}
- if (ext2_use_xip(inode->i_sb)) {
+ if (IS_DAX(inode)) {
/*
- * we need to clear the block
+ * block must be initialised before we put it in the tree
+ * so that it's not found by another thread before it's
+ * initialised
*/
- err = ext2_clear_xip_target (inode,
- le32_to_cpu(chain[depth-1].key));
+ err = dax_clear_blocks(inode, le32_to_cpu(chain[depth-1].key),
+ 1 << inode->i_blkbits);
if (err) {
mutex_unlock(&ei->truncate_mutex);
goto cleanup;
@@ -859,7 +860,12 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
size_t count = iov_iter_count(iter);
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, ext2_get_block);
+ if (IS_DAX(inode))
+ ret = dax_do_io(rw, iocb, inode, iter, offset, ext2_get_block,
+ NULL, DIO_LOCKING);
+ else
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+ ext2_get_block);
if (ret < 0 && (rw & WRITE))
ext2_write_failed(mapping, offset + count);
return ret;
@@ -885,11 +891,6 @@ const struct address_space_operations ext2_aops = {
.error_remove_page = generic_error_remove_page,
};
-const struct address_space_operations ext2_aops_xip = {
- .bmap = ext2_bmap,
- .get_xip_mem = ext2_get_xip_mem,
-};
-
const struct address_space_operations ext2_nobh_aops = {
.readpage = ext2_readpage,
.readpages = ext2_readpages,
@@ -1201,8 +1202,8 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
inode_dio_wait(inode);
- if (mapping_is_xip(inode->i_mapping))
- error = xip_truncate_page(inode->i_mapping, newsize);
+ if (IS_DAX(inode))
+ error = dax_truncate_page(inode, newsize, ext2_get_block);
else if (test_opt(inode->i_sb, NOBH))
error = nobh_truncate_page(inode->i_mapping,
newsize, ext2_get_block);
@@ -1273,7 +1274,8 @@ void ext2_set_inode_flags(struct inode *inode)
{
unsigned int flags = EXT2_I(inode)->i_flags;
- inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
+ inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME |
+ S_DIRSYNC | S_DAX);
if (flags & EXT2_SYNC_FL)
inode->i_flags |= S_SYNC;
if (flags & EXT2_APPEND_FL)
@@ -1284,6 +1286,8 @@ void ext2_set_inode_flags(struct inode *inode)
inode->i_flags |= S_NOATIME;
if (flags & EXT2_DIRSYNC_FL)
inode->i_flags |= S_DIRSYNC;
+ if (test_opt(inode->i_sb, DAX))
+ inode->i_flags |= S_DAX;
}
/* Propagate flags from i_flags to EXT2_I(inode)->i_flags */
@@ -1384,9 +1388,9 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ext2_file_inode_operations;
- if (ext2_use_xip(inode->i_sb)) {
- inode->i_mapping->a_ops = &ext2_aops_xip;
- inode->i_fop = &ext2_xip_file_operations;
+ if (test_opt(inode->i_sb, DAX)) {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index c268d0af1db9..148f6e3789ea 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -35,7 +35,6 @@
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
-#include "xip.h"
static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
{
@@ -105,9 +104,9 @@ static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode
return PTR_ERR(inode);
inode->i_op = &ext2_file_inode_operations;
- if (ext2_use_xip(inode->i_sb)) {
- inode->i_mapping->a_ops = &ext2_aops_xip;
- inode->i_fop = &ext2_xip_file_operations;
+ if (test_opt(inode->i_sb, DAX)) {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;
@@ -126,9 +125,9 @@ static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
return PTR_ERR(inode);
inode->i_op = &ext2_file_inode_operations;
- if (ext2_use_xip(inode->i_sb)) {
- inode->i_mapping->a_ops = &ext2_aops_xip;
- inode->i_fop = &ext2_xip_file_operations;
+ if (test_opt(inode->i_sb, DAX)) {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index ae55fddc26a9..d0e746e96511 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -35,7 +35,6 @@
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
-#include "xip.h"
static void ext2_sync_super(struct super_block *sb,
struct ext2_super_block *es, int wait);
@@ -292,9 +291,11 @@ static int ext2_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",grpquota");
#endif
-#if defined(CONFIG_EXT2_FS_XIP)
+#ifdef CONFIG_FS_DAX
if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
seq_puts(seq, ",xip");
+ if (sbi->s_mount_opt & EXT2_MOUNT_DAX)
+ seq_puts(seq, ",dax");
#endif
if (!test_opt(sb, RESERVATION))
@@ -403,7 +404,7 @@ enum {
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug,
Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr,
- Opt_acl, Opt_noacl, Opt_xip, Opt_ignore, Opt_err, Opt_quota,
+ Opt_acl, Opt_noacl, Opt_xip, Opt_dax, Opt_ignore, Opt_err, Opt_quota,
Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation
};
@@ -432,6 +433,7 @@ static const match_table_t tokens = {
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_xip, "xip"},
+ {Opt_dax, "dax"},
{Opt_grpquota, "grpquota"},
{Opt_ignore, "noquota"},
{Opt_quota, "quota"},
@@ -559,10 +561,14 @@ static int parse_options(char *options, struct super_block *sb)
break;
#endif
case Opt_xip:
-#ifdef CONFIG_EXT2_FS_XIP
- set_opt (sbi->s_mount_opt, XIP);
+ ext2_msg(sb, KERN_INFO, "use dax instead of xip");
+ set_opt(sbi->s_mount_opt, XIP);
+ /* Fall through */
+ case Opt_dax:
+#ifdef CONFIG_FS_DAX
+ set_opt(sbi->s_mount_opt, DAX);
#else
- ext2_msg(sb, KERN_INFO, "xip option not supported");
+ ext2_msg(sb, KERN_INFO, "dax option not supported");
#endif
break;
@@ -877,9 +883,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
MS_POSIXACL : 0);
- ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset
- EXT2_MOUNT_XIP if not */
-
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
(EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||
EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
@@ -909,11 +912,17 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
- if (ext2_use_xip(sb) && blocksize != PAGE_SIZE) {
- if (!silent)
+ if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
+ if (blocksize != PAGE_SIZE) {
ext2_msg(sb, KERN_ERR,
- "error: unsupported blocksize for xip");
- goto failed_mount;
+ "error: unsupported blocksize for dax");
+ goto failed_mount;
+ }
+ if (!sb->s_bdev->bd_disk->fops->direct_access) {
+ ext2_msg(sb, KERN_ERR,
+ "error: device does not support dax");
+ goto failed_mount;
+ }
}
/* If the blocksize doesn't match, re-read the thing.. */
@@ -1259,7 +1268,6 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
{
struct ext2_sb_info * sbi = EXT2_SB(sb);
struct ext2_super_block * es;
- unsigned long old_mount_opt = sbi->s_mount_opt;
struct ext2_mount_options old_opts;
unsigned long old_sb_flags;
int err;
@@ -1284,22 +1292,11 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
- ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset
- EXT2_MOUNT_XIP if not */
-
- if ((ext2_use_xip(sb)) && (sb->s_blocksize != PAGE_SIZE)) {
- ext2_msg(sb, KERN_WARNING,
- "warning: unsupported blocksize for xip");
- err = -EINVAL;
- goto restore_opts;
- }
-
es = sbi->s_es;
- if ((sbi->s_mount_opt ^ old_mount_opt) & EXT2_MOUNT_XIP) {
+ if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
- "xip flag with busy inodes while remounting");
- sbi->s_mount_opt &= ~EXT2_MOUNT_XIP;
- sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP;
+ "dax flag with busy inodes while remounting");
+ sbi->s_mount_opt ^= EXT2_MOUNT_DAX;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
spin_unlock(&sbi->s_lock);
diff --git a/fs/ext2/xip.c b/fs/ext2/xip.c
deleted file mode 100644
index e98171a11cfe..000000000000
--- a/fs/ext2/xip.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * linux/fs/ext2/xip.c
- *
- * Copyright (C) 2005 IBM Corporation
- * Author: Carsten Otte (cotte@de.ibm.com)
- */
-
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/genhd.h>
-#include <linux/buffer_head.h>
-#include <linux/blkdev.h>
-#include "ext2.h"
-#include "xip.h"
-
-static inline int
-__inode_direct_access(struct inode *inode, sector_t block,
- void **kaddr, unsigned long *pfn)
-{
- struct block_device *bdev = inode->i_sb->s_bdev;
- const struct block_device_operations *ops = bdev->bd_disk->fops;
- sector_t sector;
-
- sector = block * (PAGE_SIZE / 512); /* ext2 block to bdev sector */
-
- BUG_ON(!ops->direct_access);
- return ops->direct_access(bdev, sector, kaddr, pfn);
-}
-
-static inline int
-__ext2_get_block(struct inode *inode, pgoff_t pgoff, int create,
- sector_t *result)
-{
- struct buffer_head tmp;
- int rc;
-
- memset(&tmp, 0, sizeof(struct buffer_head));
- tmp.b_size = 1 << inode->i_blkbits;
- rc = ext2_get_block(inode, pgoff, &tmp, create);
- *result = tmp.b_blocknr;
-
- /* did we get a sparse block (hole in the file)? */
- if (!tmp.b_blocknr && !rc) {
- BUG_ON(create);
- rc = -ENODATA;
- }
-
- return rc;
-}
-
-int
-ext2_clear_xip_target(struct inode *inode, sector_t block)
-{
- void *kaddr;
- unsigned long pfn;
- int rc;
-
- rc = __inode_direct_access(inode, block, &kaddr, &pfn);
- if (!rc)
- clear_page(kaddr);
- return rc;
-}
-
-void ext2_xip_verify_sb(struct super_block *sb)
-{
- struct ext2_sb_info *sbi = EXT2_SB(sb);
-
- if ((sbi->s_mount_opt & EXT2_MOUNT_XIP) &&
- !sb->s_bdev->bd_disk->fops->direct_access) {
- sbi->s_mount_opt &= (~EXT2_MOUNT_XIP);
- ext2_msg(sb, KERN_WARNING,
- "warning: ignoring xip option - "
- "not supported by bdev");
- }
-}
-
-int ext2_get_xip_mem(struct address_space *mapping, pgoff_t pgoff, int create,
- void **kmem, unsigned long *pfn)
-{
- int rc;
- sector_t block;
-
- /* first, retrieve the sector number */
- rc = __ext2_get_block(mapping->host, pgoff, create, &block);
- if (rc)
- return rc;
-
- /* retrieve address of the target data */
- rc = __inode_direct_access(mapping->host, block, kmem, pfn);
- return rc;
-}
diff --git a/fs/ext2/xip.h b/fs/ext2/xip.h
deleted file mode 100644
index 18b34d2f31b3..000000000000
--- a/fs/ext2/xip.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * linux/fs/ext2/xip.h
- *
- * Copyright (C) 2005 IBM Corporation
- * Author: Carsten Otte (cotte@de.ibm.com)
- */
-
-#ifdef CONFIG_EXT2_FS_XIP
-extern void ext2_xip_verify_sb (struct super_block *);
-extern int ext2_clear_xip_target (struct inode *, sector_t);
-
-static inline int ext2_use_xip (struct super_block *sb)
-{
- struct ext2_sb_info *sbi = EXT2_SB(sb);
- return (sbi->s_mount_opt & EXT2_MOUNT_XIP);
-}
-int ext2_get_xip_mem(struct address_space *, pgoff_t, int,
- void **, unsigned long *);
-#define mapping_is_xip(map) unlikely(map->a_ops->get_xip_mem)
-#else
-#define mapping_is_xip(map) 0
-#define ext2_xip_verify_sb(sb) do { } while (0)
-#define ext2_use_xip(sb) 0
-#define ext2_clear_xip_target(inode, chain) 0
-#define ext2_get_xip_mem NULL
-#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-07 08:56:14 +0300