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-rw-r--r--fs/gfs2/ops_file.c138
1 files changed, 36 insertions, 102 deletions
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index ac8e1238cb6f..db4484a3efcc 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -21,6 +21,7 @@
21#include <linux/gfs2_ondisk.h> 21#include <linux/gfs2_ondisk.h>
22#include <linux/ext2_fs.h> 22#include <linux/ext2_fs.h>
23#include <linux/crc32.h> 23#include <linux/crc32.h>
24#include <linux/iflags.h>
24#include <asm/semaphore.h> 25#include <asm/semaphore.h>
25#include <asm/uaccess.h> 26#include <asm/uaccess.h>
26 27
@@ -536,110 +537,44 @@ static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
536 return error; 537 return error;
537} 538}
538 539
539const struct gfs2_flag_eattr { 540static const u32 iflags_to_gfs2[32] = {
540 u32 flag; 541 [iflag_Sync] = GFS2_DIF_SYNC,
541 u32 ext2; 542 [iflag_Immutable] = GFS2_DIF_IMMUTABLE,
542} gfs2_flag_eattrs[] = { 543 [iflag_Append] = GFS2_DIF_APPENDONLY,
543 { 544 [iflag_NoAtime] = GFS2_DIF_NOATIME,
544 .flag = GFS2_DIF_IMMUTABLE, 545 [iflag_Index] = GFS2_DIF_EXHASH,
545 .ext2 = EXT2_IMMUTABLE_FL, 546 [iflag_JournalData] = GFS2_DIF_JDATA,
546 }, { 547 [iflag_DirectIO] = GFS2_DIF_DIRECTIO,
547 .flag = GFS2_DIF_APPENDONLY, 548 [iflag_InheritDirectIO] = GFS2_DIF_INHERIT_DIRECTIO,
548 .ext2 = EXT2_APPEND_FL, 549 [iflag_InheritJdata] = GFS2_DIF_INHERIT_JDATA,
549 }, {
550 .flag = GFS2_DIF_JDATA,
551 .ext2 = EXT2_JOURNAL_DATA_FL,
552 }, {
553 .flag = GFS2_DIF_EXHASH,
554 .ext2 = EXT2_INDEX_FL,
555 }, {
556 .flag = GFS2_DIF_EA_INDIRECT,
557 }, {
558 .flag = GFS2_DIF_DIRECTIO,
559 }, {
560 .flag = GFS2_DIF_NOATIME,
561 .ext2 = EXT2_NOATIME_FL,
562 }, {
563 .flag = GFS2_DIF_SYNC,
564 .ext2 = EXT2_SYNC_FL,
565 }, {
566 .flag = GFS2_DIF_SYSTEM,
567 }, {
568 .flag = GFS2_DIF_TRUNC_IN_PROG,
569 }, {
570 .flag = GFS2_DIF_INHERIT_JDATA,
571 }, {
572 .flag = GFS2_DIF_INHERIT_DIRECTIO,
573 }, {
574 },
575}; 550};
576 551
577static const struct gfs2_flag_eattr *get_by_ext2(u32 ext2) 552static const u32 gfs2_to_iflags[32] = {
578{ 553 [gfs2fl_Sync] = IFLAG_SYNC,
579 const struct gfs2_flag_eattr *p = gfs2_flag_eattrs; 554 [gfs2fl_Immutable] = IFLAG_IMMUTABLE,
580 for(; p->flag; p++) { 555 [gfs2fl_AppendOnly] = IFLAG_APPEND,
581 if (ext2 == p->ext2) 556 [gfs2fl_NoAtime] = IFLAG_NOATIME,
582 return p; 557 [gfs2fl_ExHash] = IFLAG_INDEX,
583 } 558 [gfs2fl_Jdata] = IFLAG_JOURNAL_DATA,
584 return NULL; 559 [gfs2fl_Directio] = IFLAG_DIRECTIO,
585} 560 [gfs2fl_InheritDirectio] = IFLAG_INHERITDIRECTIO,
586 561 [gfs2fl_InheritJdata] = IFLAG_INHERITJDATA,
587static const struct gfs2_flag_eattr *get_by_gfs2(u32 gfs2) 562};
588{
589 const struct gfs2_flag_eattr *p = gfs2_flag_eattrs;
590 for(; p->flag; p++) {
591 if (gfs2 == p->flag)
592 return p;
593 }
594 return NULL;
595}
596
597static u32 gfs2_flags_to_ext2(u32 gfs2)
598{
599 const struct gfs2_flag_eattr *ea;
600 u32 ext2 = 0;
601 u32 mask = 1;
602
603 for(; mask != 0; mask <<=1) {
604 if (mask & gfs2) {
605 ea = get_by_gfs2(mask);
606 if (ea)
607 ext2 |= ea->ext2;
608 }
609 }
610 return ext2;
611}
612
613static int gfs2_flags_from_ext2(u32 *gfs2, u32 ext2)
614{
615 const struct gfs2_flag_eattr *ea;
616 u32 mask = 1;
617
618 for(; mask != 0; mask <<= 1) {
619 if (mask & ext2) {
620 ea = get_by_ext2(mask);
621 if (ea == NULL)
622 return -EINVAL;
623 *gfs2 |= ea->flag;
624 }
625 }
626 return 0;
627}
628 563
629static int get_ext2_flags(struct inode *inode, u32 __user *ptr) 564static int gfs2_get_flags(struct inode *inode, u32 __user *ptr)
630{ 565{
631 struct gfs2_inode *ip = inode->u.generic_ip; 566 struct gfs2_inode *ip = inode->u.generic_ip;
632 struct gfs2_holder gh; 567 struct gfs2_holder gh;
633 int error; 568 int error;
634 u32 ext2; 569 u32 iflags;
635 570
636 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); 571 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
637 error = gfs2_glock_nq_m_atime(1, &gh); 572 error = gfs2_glock_nq_m_atime(1, &gh);
638 if (error) 573 if (error)
639 return error; 574 return error;
640 575
641 ext2 = gfs2_flags_to_ext2(ip->i_di.di_flags); 576 iflags = iflags_cvt(gfs2_to_iflags, ip->i_di.di_flags);
642 if (put_user(ext2, ptr)) 577 if (put_user(iflags, ptr))
643 error = -EFAULT; 578 error = -EFAULT;
644 579
645 gfs2_glock_dq_m(1, &gh); 580 gfs2_glock_dq_m(1, &gh);
@@ -665,7 +600,7 @@ static int get_ext2_flags(struct inode *inode, u32 __user *ptr)
665 * @mask: Indicates which flags are valid 600 * @mask: Indicates which flags are valid
666 * 601 *
667 */ 602 */
668static int gfs2_set_flags(struct inode *inode, u32 flags, u32 mask) 603static int do_gfs2_set_flags(struct inode *inode, u32 flags, u32 mask)
669{ 604{
670 struct gfs2_inode *ip = inode->u.generic_ip; 605 struct gfs2_inode *ip = inode->u.generic_ip;
671 struct buffer_head *bh; 606 struct buffer_head *bh;
@@ -717,24 +652,23 @@ out:
717 return error; 652 return error;
718} 653}
719 654
720static int set_ext2_flags(struct inode *inode, u32 __user *ptr) 655static int gfs2_set_flags(struct inode *inode, u32 __user *ptr)
721{ 656{
722 u32 ext2, gfs2; 657 u32 iflags, gfsflags;
723 if (get_user(ext2, ptr)) 658 if (get_user(iflags, ptr))
724 return -EFAULT; 659 return -EFAULT;
725 if (gfs2_flags_from_ext2(&gfs2, ext2)) 660 gfsflags = iflags_cvt(iflags_to_gfs2, iflags);
726 return -EINVAL; 661 return do_gfs2_set_flags(inode, gfsflags, ~0);
727 return gfs2_set_flags(inode, gfs2, ~0);
728} 662}
729 663
730int gfs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, 664int gfs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
731 unsigned long arg) 665 unsigned long arg)
732{ 666{
733 switch(cmd) { 667 switch(cmd) {
734 case EXT2_IOC_GETFLAGS: 668 case IFLAGS_GET_IOC:
735 return get_ext2_flags(inode, (u32 __user *)arg); 669 return gfs2_get_flags(inode, (u32 __user *)arg);
736 case EXT2_IOC_SETFLAGS: 670 case IFLAGS_SET_IOC:
737 return set_ext2_flags(inode, (u32 __user *)arg); 671 return gfs2_set_flags(inode, (u32 __user *)arg);
738 } 672 }
739 return -ENOTTY; 673 return -ENOTTY;
740} 674}