From 5f0319a79043457d2555f059fac68c1d840ce381 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 16 Sep 2008 14:05:16 -0400 Subject: [PATCH] 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 Signed-off-by: Steve French --- fs/cifs/cifsfs.h | 2 +- fs/cifs/inode.c | 90 ++++++++++++++++++++++-------------------------- 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, struct nameidata *); extern struct dentry *cifs_lookup(struct inode *, struct dentry *, struct nameidata *); -extern int cifs_unlink(struct inode *, struct dentry *); +extern int cifs_unlink(struct inode *dir, struct dentry *dentry); extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *); extern int cifs_mknod(struct inode *, struct dentry *, int, dev_t); extern 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) return inode; } -int cifs_unlink(struct inode *inode, struct dentry *direntry) +int cifs_unlink(struct inode *dir, struct dentry *dentry) { int rc = 0; int xid; - struct cifs_sb_info *cifs_sb; - struct cifsTconInfo *pTcon; char *full_path = NULL; + struct inode *inode = dentry->d_inode; struct cifsInodeInfo *cifsInode; + struct super_block *sb = dir->i_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + struct cifsTconInfo *tcon = cifs_sb->tcon; FILE_BASIC_INFO *pinfo_buf; - cFYI(1, ("cifs_unlink, inode = 0x%p", inode)); + cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); xid = GetXid(); - if (inode) - cifs_sb = CIFS_SB(inode->i_sb); - else - cifs_sb = CIFS_SB(direntry->d_sb); - pTcon = cifs_sb->tcon; - - /* Unlink can be called from rename so we can not grab the sem here - since we deadlock otherwise */ -/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/ - full_path = build_path_from_dentry(direntry); -/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/ + /* Unlink can be called from rename so we can not take the + * sb->s_vfs_rename_mutex here */ + full_path = build_path_from_dentry(dentry); if (full_path == NULL) { FreeXid(xid); return -ENOMEM; } - if ((pTcon->ses->capabilities & CAP_UNIX) && + if ((tcon->ses->capabilities & CAP_UNIX) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & - le64_to_cpu(pTcon->fsUnixInfo.Capability))) { - rc = CIFSPOSIXDelFile(xid, pTcon, full_path, + le64_to_cpu(tcon->fsUnixInfo.Capability))) { + rc = CIFSPOSIXDelFile(xid, tcon, full_path, SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); cFYI(1, ("posix del rc %d", rc)); @@ -706,31 +700,31 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry) goto psx_del_no_retry; } - rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls, + rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); psx_del_no_retry: if (!rc) { - if (direntry->d_inode) - drop_nlink(direntry->d_inode); + if (inode) + drop_nlink(inode); } else if (rc == -ENOENT) { - d_drop(direntry); + d_drop(dentry); } else if (rc == -ETXTBSY) { int oplock = 0; __u16 netfid; - rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE, + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE, CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, &netfid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc == 0) { - CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL, + CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - CIFSSMBClose(xid, pTcon, netfid); - if (direntry->d_inode) - drop_nlink(direntry->d_inode); + CIFSSMBClose(xid, tcon, netfid); + if (inode) + drop_nlink(inode); } } else if (rc == -EACCES) { /* try only if r/o attribute set in local lookup data? */ @@ -738,8 +732,8 @@ psx_del_no_retry: if (pinfo_buf) { /* ATTRS set to normal clears r/o bit */ pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL); - if (!(pTcon->ses->flags & CIFS_SES_NT4)) - rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, + if (!(tcon->ses->flags & CIFS_SES_NT4)) + rc = CIFSSMBSetPathInfo(xid, tcon, full_path, pinfo_buf, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & @@ -750,7 +744,7 @@ psx_del_no_retry: if (rc == -EOPNOTSUPP) { int oplock = 0; __u16 netfid; - /* rc = CIFSSMBSetAttrLegacy(xid, pTcon, + /* rc = CIFSSMBSetAttrLegacy(xid, tcon, full_path, (__u16)ATTR_NORMAL, cifs_sb->local_nls); @@ -761,7 +755,7 @@ psx_del_no_retry: /* BB could scan to see if we already have it open and pass in pid of opener to function */ - rc = CIFSSMBOpen(xid, pTcon, full_path, + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, 0, &netfid, &oplock, NULL, @@ -769,28 +763,28 @@ psx_del_no_retry: cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc == 0) { - rc = CIFSSMBSetFileInfo(xid, pTcon, + rc = CIFSSMBSetFileInfo(xid, tcon, pinfo_buf, netfid, current->tgid); - CIFSSMBClose(xid, pTcon, netfid); + CIFSSMBClose(xid, tcon, netfid); } } kfree(pinfo_buf); } if (rc == 0) { - rc = CIFSSMBDelFile(xid, pTcon, full_path, + rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (!rc) { - if (direntry->d_inode) - drop_nlink(direntry->d_inode); + if (inode) + drop_nlink(inode); } else if (rc == -ETXTBSY) { int oplock = 0; __u16 netfid; - rc = CIFSSMBOpen(xid, pTcon, full_path, + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE, CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE, @@ -799,30 +793,28 @@ psx_del_no_retry: cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc == 0) { - CIFSSMBRenameOpenFile(xid, pTcon, + CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - CIFSSMBClose(xid, pTcon, netfid); - if (direntry->d_inode) - drop_nlink(direntry->d_inode); + CIFSSMBClose(xid, tcon, netfid); + if (inode) + drop_nlink(inode); } /* BB if rc = -ETXTBUSY goto the rename logic BB */ } } } - if (direntry->d_inode) { - cifsInode = CIFS_I(direntry->d_inode); - cifsInode->time = 0; /* will force revalidate to get info - when needed */ - direntry->d_inode->i_ctime = current_fs_time(inode->i_sb); - } if (inode) { - inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); cifsInode = CIFS_I(inode); - cifsInode->time = 0; /* force revalidate of dir as well */ + cifsInode->time = 0; /* will force revalidate to get info + when needed */ + inode->i_ctime = current_fs_time(sb); } + dir->i_ctime = dir->i_mtime = current_fs_time(sb); + cifsInode = CIFS_I(dir); + cifsInode->time = 0; /* force revalidate of dir as well */ kfree(full_path); FreeXid(xid); -- 2.20.1