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authorCarsten Otte <cotte@de.ibm.com>2005-06-23 22:05:26 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 00:06:41 -0700
commit6d79125bba55ee82701f1c7d4ebbc1aa20ecbe4e (patch)
treefbd7f82fea19fd89e09312fe89919774b94a6efe /fs/ext2/super.c
parentceffc078528befc008c6f2c2c4decda79eabd534 (diff)
downloadop-kernel-dev-6d79125bba55ee82701f1c7d4ebbc1aa20ecbe4e.zip
op-kernel-dev-6d79125bba55ee82701f1c7d4ebbc1aa20ecbe4e.tar.gz
[PATCH] xip: ext2: execute in place
These are the ext2 related parts. Ext2 now uses the xip_* file operations along with the get_xip_page aop when mounted with -o xip. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext2/super.c')
-rw-r--r--fs/ext2/super.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 661c3d9..876e391 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -31,6 +31,7 @@
#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);
@@ -257,7 +258,7 @@ enum {
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, Opt_nobh,
- Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
+ Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_xip,
Opt_ignore, Opt_err,
};
@@ -286,6 +287,7 @@ static match_table_t tokens = {
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
+ {Opt_xip, "xip"},
{Opt_ignore, "grpquota"},
{Opt_ignore, "noquota"},
{Opt_ignore, "quota"},
@@ -397,6 +399,13 @@ static int parse_options (char * options,
printk("EXT2 (no)acl options not supported\n");
break;
#endif
+ case Opt_xip:
+#ifdef CONFIG_EXT2_FS_XIP
+ set_opt (sbi->s_mount_opt, XIP);
+#else
+ printk("EXT2 xip option not supported\n");
+#endif
+ break;
case Opt_ignore:
break;
default:
@@ -640,6 +649,9 @@ 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) ||
@@ -668,6 +680,13 @@ 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) ||
+ (sb->s_blocksize != blocksize))) {
+ if (!silent)
+ printk("XIP: Unsupported blocksize\n");
+ goto failed_mount;
+ }
+
/* If the blocksize doesn't match, re-read the thing.. */
if (sb->s_blocksize != blocksize) {
brelse(bh);
@@ -916,6 +935,7 @@ 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;
/*
* Allow the "check" option to be passed as a remount option.
@@ -927,6 +947,11 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
es = sbi->s_es;
+ if (((sbi->s_mount_opt & EXT2_MOUNT_XIP) !=
+ (old_mount_opt & EXT2_MOUNT_XIP)) &&
+ invalidate_inodes(sb))
+ ext2_warning(sb, __FUNCTION__, "busy inodes while remounting "\
+ "xip remain in cache (no functional problem)");
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
if (*flags & MS_RDONLY) {
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