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authorJeff Layton <jlayton@redhat.com>2008-09-16 14:05:16 -0400
committerSteve French <sfrench@us.ibm.com>2008-09-16 16:14:34 -0400
commit5f0319a79043457d2555f059fac68c1d840ce381 (patch)
tree0c469c74ae2125ba24aec681834364ea24bd7ce6 /fs/cifs
parent6bfb09a1005193be5c81ebac9f3ef85210142650 (diff)
cifs: clean up variables in cifs_unlink
Change parameters to cifs_unlink to match the ones used in the generic VFS. Add some local variables to cut down on the amount of struct dereferencing that needs to be done, and eliminate some unneeded NULL pointer checks on the parent directory inode. Finally, rename pTcon to "tcon" to more closely match standard kernel coding style. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifsfs.h2
-rw-r--r--fs/cifs/inode.c90
2 files changed, 42 insertions, 50 deletions
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 135c965c4137..f7b4a5cd837b 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -41,7 +41,7 @@ extern int cifs_create(struct inode *, struct dentry *, int,
41 struct nameidata *); 41 struct nameidata *);
42extern struct dentry *cifs_lookup(struct inode *, struct dentry *, 42extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
43 struct nameidata *); 43 struct nameidata *);
44extern int cifs_unlink(struct inode *, struct dentry *); 44extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
45extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *); 45extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
46extern int cifs_mknod(struct inode *, struct dentry *, int, dev_t); 46extern int cifs_mknod(struct inode *, struct dentry *, int, dev_t);
47extern int cifs_mkdir(struct inode *, struct dentry *, int); 47extern int cifs_mkdir(struct inode *, struct dentry *, int);
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9c548f110102..511c52616794 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -665,40 +665,34 @@ struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
665 return inode; 665 return inode;
666} 666}
667 667
668int cifs_unlink(struct inode *inode, struct dentry *direntry) 668int cifs_unlink(struct inode *dir, struct dentry *dentry)
669{ 669{
670 int rc = 0; 670 int rc = 0;
671 int xid; 671 int xid;
672 struct cifs_sb_info *cifs_sb;
673 struct cifsTconInfo *pTcon;
674 char *full_path = NULL; 672 char *full_path = NULL;
673 struct inode *inode = dentry->d_inode;
675 struct cifsInodeInfo *cifsInode; 674 struct cifsInodeInfo *cifsInode;
675 struct super_block *sb = dir->i_sb;
676 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
677 struct cifsTconInfo *tcon = cifs_sb->tcon;
676 FILE_BASIC_INFO *pinfo_buf; 678 FILE_BASIC_INFO *pinfo_buf;
677 679
678 cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); 680 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
679 681
680 xid = GetXid(); 682 xid = GetXid();
681 683
682 if (inode) 684 /* Unlink can be called from rename so we can not take the
683 cifs_sb = CIFS_SB(inode->i_sb); 685 * sb->s_vfs_rename_mutex here */
684 else 686 full_path = build_path_from_dentry(dentry);
685 cifs_sb = CIFS_SB(direntry->d_sb);
686 pTcon = cifs_sb->tcon;
687
688 /* Unlink can be called from rename so we can not grab the sem here
689 since we deadlock otherwise */
690/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
691 full_path = build_path_from_dentry(direntry);
692/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
693 if (full_path == NULL) { 687 if (full_path == NULL) {
694 FreeXid(xid); 688 FreeXid(xid);
695 return -ENOMEM; 689 return -ENOMEM;
696 } 690 }
697 691
698 if ((pTcon->ses->capabilities & CAP_UNIX) && 692 if ((tcon->ses->capabilities & CAP_UNIX) &&
699 (CIFS_UNIX_POSIX_PATH_OPS_CAP & 693 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
700 le64_to_cpu(pTcon->fsUnixInfo.Capability))) { 694 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
701 rc = CIFSPOSIXDelFile(xid, pTcon, full_path, 695 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
702 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, 696 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
703 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); 697 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
704 cFYI(1, ("posix del rc %d", rc)); 698 cFYI(1, ("posix del rc %d", rc));
@@ -706,31 +700,31 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
706 goto psx_del_no_retry; 700 goto psx_del_no_retry;
707 } 701 }
708 702
709 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, 703 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
710 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); 704 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
711psx_del_no_retry: 705psx_del_no_retry:
712 if (!rc) { 706 if (!rc) {
713 if (direntry->d_inode) 707 if (inode)
714 drop_nlink(direntry->d_inode); 708 drop_nlink(inode);
715 } else if (rc == -ENOENT) { 709 } else if (rc == -ENOENT) {
716 d_drop(direntry); 710 d_drop(dentry);
717 } else if (rc == -ETXTBSY) { 711 } else if (rc == -ETXTBSY) {
718 int oplock = 0; 712 int oplock = 0;
719 __u16 netfid; 713 __u16 netfid;
720 714
721 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, 715 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE,
722 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, 716 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
723 &netfid, &oplock, NULL, cifs_sb->local_nls, 717 &netfid, &oplock, NULL, cifs_sb->local_nls,
724 cifs_sb->mnt_cifs_flags & 718 cifs_sb->mnt_cifs_flags &
725 CIFS_MOUNT_MAP_SPECIAL_CHR); 719 CIFS_MOUNT_MAP_SPECIAL_CHR);
726 if (rc == 0) { 720 if (rc == 0) {
727 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, 721 CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL,
728 cifs_sb->local_nls, 722 cifs_sb->local_nls,
729 cifs_sb->mnt_cifs_flags & 723 cifs_sb->mnt_cifs_flags &
730 CIFS_MOUNT_MAP_SPECIAL_CHR); 724 CIFS_MOUNT_MAP_SPECIAL_CHR);
731 CIFSSMBClose(xid, pTcon, netfid); 725 CIFSSMBClose(xid, tcon, netfid);
732 if (direntry->d_inode) 726 if (inode)
733 drop_nlink(direntry->d_inode); 727 drop_nlink(inode);
734 } 728 }
735 } else if (rc == -EACCES) { 729 } else if (rc == -EACCES) {
736 /* try only if r/o attribute set in local lookup data? */ 730 /* try only if r/o attribute set in local lookup data? */
@@ -738,8 +732,8 @@ psx_del_no_retry:
738 if (pinfo_buf) { 732 if (pinfo_buf) {
739 /* ATTRS set to normal clears r/o bit */ 733 /* ATTRS set to normal clears r/o bit */
740 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); 734 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
741 if (!(pTcon->ses->flags & CIFS_SES_NT4)) 735 if (!(tcon->ses->flags & CIFS_SES_NT4))
742 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, 736 rc = CIFSSMBSetPathInfo(xid, tcon, full_path,
743 pinfo_buf, 737 pinfo_buf,
744 cifs_sb->local_nls, 738 cifs_sb->local_nls,
745 cifs_sb->mnt_cifs_flags & 739 cifs_sb->mnt_cifs_flags &
@@ -750,7 +744,7 @@ psx_del_no_retry:
750 if (rc == -EOPNOTSUPP) { 744 if (rc == -EOPNOTSUPP) {
751 int oplock = 0; 745 int oplock = 0;
752 __u16 netfid; 746 __u16 netfid;
753 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, 747 /* rc = CIFSSMBSetAttrLegacy(xid, tcon,
754 full_path, 748 full_path,
755 (__u16)ATTR_NORMAL, 749 (__u16)ATTR_NORMAL,
756 cifs_sb->local_nls); 750 cifs_sb->local_nls);
@@ -761,7 +755,7 @@ psx_del_no_retry:
761 755
762 /* BB could scan to see if we already have it open 756 /* BB could scan to see if we already have it open
763 and pass in pid of opener to function */ 757 and pass in pid of opener to function */
764 rc = CIFSSMBOpen(xid, pTcon, full_path, 758 rc = CIFSSMBOpen(xid, tcon, full_path,
765 FILE_OPEN, SYNCHRONIZE | 759 FILE_OPEN, SYNCHRONIZE |
766 FILE_WRITE_ATTRIBUTES, 0, 760 FILE_WRITE_ATTRIBUTES, 0,
767 &netfid, &oplock, NULL, 761 &netfid, &oplock, NULL,
@@ -769,28 +763,28 @@ psx_del_no_retry:
769 cifs_sb->mnt_cifs_flags & 763 cifs_sb->mnt_cifs_flags &
770 CIFS_MOUNT_MAP_SPECIAL_CHR); 764 CIFS_MOUNT_MAP_SPECIAL_CHR);
771 if (rc == 0) { 765 if (rc == 0) {
772 rc = CIFSSMBSetFileInfo(xid, pTcon, 766 rc = CIFSSMBSetFileInfo(xid, tcon,
773 pinfo_buf, 767 pinfo_buf,
774 netfid, 768 netfid,
775 current->tgid); 769 current->tgid);
776 CIFSSMBClose(xid, pTcon, netfid); 770 CIFSSMBClose(xid, tcon, netfid);
777 } 771 }
778 } 772 }
779 kfree(pinfo_buf); 773 kfree(pinfo_buf);
780 } 774 }
781 if (rc == 0) { 775 if (rc == 0) {
782 rc = CIFSSMBDelFile(xid, pTcon, full_path, 776 rc = CIFSSMBDelFile(xid, tcon, full_path,
783 cifs_sb->local_nls, 777 cifs_sb->local_nls,
784 cifs_sb->mnt_cifs_flags & 778 cifs_sb->mnt_cifs_flags &
785 CIFS_MOUNT_MAP_SPECIAL_CHR); 779 CIFS_MOUNT_MAP_SPECIAL_CHR);
786 if (!rc) { 780 if (!rc) {
787 if (direntry->d_inode) 781 if (inode)
788 drop_nlink(direntry->d_inode); 782 drop_nlink(inode);
789 } else if (rc == -ETXTBSY) { 783 } else if (rc == -ETXTBSY) {
790 int oplock = 0; 784 int oplock = 0;
791 __u16 netfid; 785 __u16 netfid;
792 786
793 rc = CIFSSMBOpen(xid, pTcon, full_path, 787 rc = CIFSSMBOpen(xid, tcon, full_path,
794 FILE_OPEN, DELETE, 788 FILE_OPEN, DELETE,
795 CREATE_NOT_DIR | 789 CREATE_NOT_DIR |
796 CREATE_DELETE_ON_CLOSE, 790 CREATE_DELETE_ON_CLOSE,
@@ -799,30 +793,28 @@ psx_del_no_retry:
799 cifs_sb->mnt_cifs_flags & 793 cifs_sb->mnt_cifs_flags &
800 CIFS_MOUNT_MAP_SPECIAL_CHR); 794 CIFS_MOUNT_MAP_SPECIAL_CHR);
801 if (rc == 0) { 795 if (rc == 0) {
802 CIFSSMBRenameOpenFile(xid, pTcon, 796 CIFSSMBRenameOpenFile(xid, tcon,
803 netfid, NULL, 797 netfid, NULL,
804 cifs_sb->local_nls, 798 cifs_sb->local_nls,
805 cifs_sb->mnt_cifs_flags & 799 cifs_sb->mnt_cifs_flags &
806 CIFS_MOUNT_MAP_SPECIAL_CHR); 800 CIFS_MOUNT_MAP_SPECIAL_CHR);
807 CIFSSMBClose(xid, pTcon, netfid); 801 CIFSSMBClose(xid, tcon, netfid);
808 if (direntry->d_inode) 802 if (inode)
809 drop_nlink(direntry->d_inode); 803 drop_nlink(inode);
810 } 804 }
811 /* BB if rc = -ETXTBUSY goto the rename logic BB */ 805 /* BB if rc = -ETXTBUSY goto the rename logic BB */
812 } 806 }
813 } 807 }
814 } 808 }
815 if (direntry->d_inode) {
816 cifsInode = CIFS_I(direntry->d_inode);
817 cifsInode->time = 0; /* will force revalidate to get info
818 when needed */
819 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
820 }
821 if (inode) { 809 if (inode) {
822 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
823 cifsInode = CIFS_I(inode); 810 cifsInode = CIFS_I(inode);
824 cifsInode->time = 0; /* force revalidate of dir as well */ 811 cifsInode->time = 0; /* will force revalidate to get info
812 when needed */
813 inode->i_ctime = current_fs_time(sb);
825 } 814 }
815 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
816 cifsInode = CIFS_I(dir);
817 cifsInode->time = 0; /* force revalidate of dir as well */
826 818
827 kfree(full_path); 819 kfree(full_path);
828 FreeXid(xid); 820 FreeXid(xid);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 03:21:45 -0500