* [PATCH] ext4: Export needed symbol for ZERO_PAGE usage in modules.
@ 2008-03-11 5:46 Aneesh Kumar K.V
2008-03-11 5:50 ` Aneesh Kumar K.V
0 siblings, 1 reply; 3+ messages in thread
From: Aneesh Kumar K.V @ 2008-03-11 5:46 UTC (permalink / raw)
To: cmm, tytso; +Cc: linux-ext4, Aneesh Kumar K.V
ext4 use ZERO_PAGE(0) to zero out blocks. We need to export
different symbols in different arch for the usage of ZERO_PAGE
in modules.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/arm/mm/mmu.c | 1 +
arch/m68k/mm/init.c | 1 +
arch/powerpc/kernel/ppc_ksyms.c | 2 ++
arch/sparc/kernel/sparc_ksyms.c | 2 ++
arch/sparc64/mm/init.c | 1 +
5 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index d41a75e..2d6d682 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -35,6 +35,7 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
* zero-initialized data and COW.
*/
struct page *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
/*
* The pmd table for the upper-most set of pages.
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index f42caa7..ee27ed2 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -69,6 +69,7 @@ void __init m68k_setup_node(int node)
*/
void *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
void show_mem(void)
{
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index aa9ff35..97dab6e 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -189,3 +189,5 @@ EXPORT_SYMBOL(intercept_table);
EXPORT_SYMBOL(__mtdcr);
EXPORT_SYMBOL(__mfdcr);
#endif
+
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c
index c1025e5..e902846 100644
--- a/arch/sparc/kernel/sparc_ksyms.c
+++ b/arch/sparc/kernel/sparc_ksyms.c
@@ -295,3 +295,5 @@ EXPORT_SYMBOL(do_BUG);
/* Sun Power Management Idle Handler */
EXPORT_SYMBOL(pm_idle);
+
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index b5c3041..2d15f92 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -159,6 +159,7 @@ extern unsigned int sparc_ramdisk_image;
extern unsigned int sparc_ramdisk_size;
struct page *mem_map_zero __read_mostly;
+EXPORT_SYMBOL(mem_map_zero);
unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly;
--
1.5.4.4.481.g5075.dirty
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH] ext3: Return EIO if new block is allocated from system zone.
@ 2008-03-24 17:04 Aneesh Kumar K.V
2008-03-24 17:04 ` [PATCH] ext3: Use page_mkwrite vma_operations to get mmap write notification Aneesh Kumar K.V
0 siblings, 1 reply; 3+ messages in thread
From: Aneesh Kumar K.V @ 2008-03-24 17:04 UTC (permalink / raw)
To: cmm, akpm; +Cc: linux-ext4, Aneesh Kumar K.V, Mingming Cao
If the block allocator gets blocks out of system zone ext3 calls
ext3_error. But if the file system is mounted with errors=continue
return with -EIO.
System zone is the block range mapping block bitmap, inode bitmap and inode
table.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.vnet.ibm.com>
---
fs/ext3/balloc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index da0cb2c..6ce7f7d 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -1642,7 +1642,7 @@ allocated:
"Allocating block in system zone - "
"blocks from "E3FSBLK", length %lu",
ret_block, num);
- goto out;
+ goto io_error;
}
performed_allocation = 1;
--
1.5.5.rc0.16.g02b00.dirty
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] ext3: Use page_mkwrite vma_operations to get mmap write notification.
2008-03-24 17:04 [PATCH] ext3: Return EIO if new block is allocated from system zone Aneesh Kumar K.V
@ 2008-03-24 17:04 ` Aneesh Kumar K.V
2008-03-24 17:04 ` [PATCH] ext4: Export needed symbol for ZERO_PAGE usage in modules Aneesh Kumar K.V
0 siblings, 1 reply; 3+ messages in thread
From: Aneesh Kumar K.V @ 2008-03-24 17:04 UTC (permalink / raw)
To: cmm, akpm; +Cc: linux-ext4, Aneesh Kumar K.V
We would like to get notified when we are doing a write on mmap section.
The changes are needed to handle ENOSPC when writing to an mmap section
of files with holes.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/ext3/file.c | 19 ++++++++++++++++++-
fs/ext3/inode.c | 5 +++++
include/linux/ext3_fs.h | 1 +
3 files changed, 24 insertions(+), 1 deletions(-)
diff --git a/fs/ext3/file.c b/fs/ext3/file.c
index acc4913..09e22e4 100644
--- a/fs/ext3/file.c
+++ b/fs/ext3/file.c
@@ -106,6 +106,23 @@ force_commit:
return ret;
}
+static struct vm_operations_struct ext3_file_vm_ops = {
+ .fault = filemap_fault,
+ .page_mkwrite = ext3_page_mkwrite,
+};
+
+static int ext3_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct address_space *mapping = file->f_mapping;
+
+ if (!mapping->a_ops->readpage)
+ return -ENOEXEC;
+ file_accessed(file);
+ vma->vm_ops = &ext3_file_vm_ops;
+ vma->vm_flags |= VM_CAN_NONLINEAR;
+ return 0;
+}
+
const struct file_operations ext3_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
@@ -116,7 +133,7 @@ const struct file_operations ext3_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext3_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
+ .mmap = ext3_file_mmap,
.open = generic_file_open,
.release = ext3_release_file,
.fsync = ext3_sync_file,
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index eb95670..2293506 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -3306,3 +3306,8 @@ int ext3_change_inode_journal_flag(struct inode *inode, int val)
return err;
}
+
+int ext3_page_mkwrite(struct vm_area_struct *vma, struct page *page)
+{
+ return block_page_mkwrite(vma, page, ext3_get_block);
+}
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 36c5403..715c35e 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -836,6 +836,7 @@ extern void ext3_truncate (struct inode *);
extern void ext3_set_inode_flags(struct inode *);
extern void ext3_get_inode_flags(struct ext3_inode_info *);
extern void ext3_set_aops(struct inode *inode);
+extern int ext3_page_mkwrite(struct vm_area_struct *vma, struct page *page);
/* ioctl.c */
extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
--
1.5.5.rc0.16.g02b00.dirty
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH] ext4: Export needed symbol for ZERO_PAGE usage in modules.
2008-03-24 17:04 ` [PATCH] ext3: Use page_mkwrite vma_operations to get mmap write notification Aneesh Kumar K.V
@ 2008-03-24 17:04 ` Aneesh Kumar K.V
0 siblings, 0 replies; 3+ messages in thread
From: Aneesh Kumar K.V @ 2008-03-24 17:04 UTC (permalink / raw)
To: cmm, akpm; +Cc: linux-ext4, Aneesh Kumar K.V
ext4 use ZERO_PAGE(0) to zero out blocks. We need to export
different symbols in different arch for the usage of ZERO_PAGE
in modules.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/arm/mm/mmu.c | 1 +
arch/m68k/mm/init.c | 1 +
arch/powerpc/kernel/ppc_ksyms.c | 2 ++
arch/sparc/kernel/sparc_ksyms.c | 2 ++
arch/sparc64/mm/init.c | 1 +
5 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index d41a75e..2d6d682 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -35,6 +35,7 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
* zero-initialized data and COW.
*/
struct page *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
/*
* The pmd table for the upper-most set of pages.
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index f42caa7..ee27ed2 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -69,6 +69,7 @@ void __init m68k_setup_node(int node)
*/
void *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
void show_mem(void)
{
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 9c98424..93fb09a 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -192,3 +192,5 @@ EXPORT_SYMBOL(intercept_table);
EXPORT_SYMBOL(__mtdcr);
EXPORT_SYMBOL(__mfdcr);
#endif
+
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c
index c1025e5..e902846 100644
--- a/arch/sparc/kernel/sparc_ksyms.c
+++ b/arch/sparc/kernel/sparc_ksyms.c
@@ -295,3 +295,5 @@ EXPORT_SYMBOL(do_BUG);
/* Sun Power Management Idle Handler */
EXPORT_SYMBOL(pm_idle);
+
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index b5c3041..2d15f92 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -159,6 +159,7 @@ extern unsigned int sparc_ramdisk_image;
extern unsigned int sparc_ramdisk_size;
struct page *mem_map_zero __read_mostly;
+EXPORT_SYMBOL(mem_map_zero);
unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly;
--
1.5.5.rc0.16.g02b00.dirty
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-03-24 17:05 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2008-03-11 5:46 [PATCH] ext4: Export needed symbol for ZERO_PAGE usage in modules Aneesh Kumar K.V
2008-03-11 5:50 ` Aneesh Kumar K.V
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2008-03-24 17:04 [PATCH] ext3: Return EIO if new block is allocated from system zone Aneesh Kumar K.V
2008-03-24 17:04 ` [PATCH] ext3: Use page_mkwrite vma_operations to get mmap write notification Aneesh Kumar K.V
2008-03-24 17:04 ` [PATCH] ext4: Export needed symbol for ZERO_PAGE usage in modules Aneesh Kumar K.V
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