From 703a3b8e5c01cf6fb33c6d8dc99905f889a4e992 Mon Sep 17 00:00:00 2001 From: Steve French Date: Thu, 21 May 2009 22:21:53 +0000 Subject: [CIFS] fix posix open regression Posix open code was not properly adding the file to the list of open files. Fix allocating cifsFileInfo more than once, and adding twice to flist and tlist. Also fix mode setting to be done in one place in these paths. Signed-off-by: Steve French Reviewed-by: Shirish Pargaonkar Tested-by: Jeff Layton Tested-by: Luca Tettamanti --- fs/cifs/file.c | 66 ++++++++++++++++++++++++++++++++-------------------------- 1 file changed, 37 insertions(+), 29 deletions(-) (limited to 'fs/cifs/file.c') diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 38c06f82657..302ea15f02e 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -130,10 +130,6 @@ static inline int cifs_posix_open_inode_helper(struct inode *inode, struct cifsFileInfo *pCifsFile, int oplock, u16 netfid) { - file->private_data = kmalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); - if (file->private_data == NULL) - return -ENOMEM; - pCifsFile = cifs_init_private(file->private_data, inode, file, netfid); write_lock(&GlobalSMBSeslock); pCifsInode = CIFS_I(file->f_path.dentry->d_inode); @@ -184,6 +180,38 @@ psx_client_can_cache: return 0; } +static struct cifsFileInfo * +cifs_fill_filedata(struct file *file) +{ + struct list_head *tmp; + struct cifsFileInfo *pCifsFile = NULL; + struct cifsInodeInfo *pCifsInode = NULL; + + /* search inode for this file and fill in file->private_data */ + pCifsInode = CIFS_I(file->f_path.dentry->d_inode); + read_lock(&GlobalSMBSeslock); + list_for_each(tmp, &pCifsInode->openFileList) { + pCifsFile = list_entry(tmp, struct cifsFileInfo, flist); + if ((pCifsFile->pfile == NULL) && + (pCifsFile->pid == current->tgid)) { + /* mode set in cifs_create */ + + /* needed for writepage */ + pCifsFile->pfile = file; + file->private_data = pCifsFile; + break; + } + } + read_unlock(&GlobalSMBSeslock); + + if (file->private_data != NULL) { + return pCifsFile; + } else if ((file->f_flags & O_CREAT) && (file->f_flags & O_EXCL)) + cERROR(1, ("could not find file instance for " + "new file %p", file)); + return NULL; +} + /* all arguments to this function must be checked for validity in caller */ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file, struct cifsInodeInfo *pCifsInode, struct cifsFileInfo *pCifsFile, @@ -258,7 +286,6 @@ int cifs_open(struct inode *inode, struct file *file) struct cifsTconInfo *tcon; struct cifsFileInfo *pCifsFile; struct cifsInodeInfo *pCifsInode; - struct list_head *tmp; char *full_path = NULL; int desiredAccess; int disposition; @@ -270,32 +297,12 @@ int cifs_open(struct inode *inode, struct file *file) cifs_sb = CIFS_SB(inode->i_sb); tcon = cifs_sb->tcon; - /* search inode for this file and fill in file->private_data */ pCifsInode = CIFS_I(file->f_path.dentry->d_inode); - read_lock(&GlobalSMBSeslock); - list_for_each(tmp, &pCifsInode->openFileList) { - pCifsFile = list_entry(tmp, struct cifsFileInfo, - flist); - if ((pCifsFile->pfile == NULL) && - (pCifsFile->pid == current->tgid)) { - /* mode set in cifs_create */ - - /* needed for writepage */ - pCifsFile->pfile = file; - - file->private_data = pCifsFile; - break; - } - } - read_unlock(&GlobalSMBSeslock); - - if (file->private_data != NULL) { - rc = 0; + pCifsFile = cifs_fill_filedata(file); + if (pCifsFile) { FreeXid(xid); - return rc; - } else if ((file->f_flags & O_CREAT) && (file->f_flags & O_EXCL)) - cERROR(1, ("could not find file instance for " - "new file %p", file)); + return 0; + } full_path = build_path_from_dentry(file->f_path.dentry); if (full_path == NULL) { @@ -325,6 +332,7 @@ int cifs_open(struct inode *inode, struct file *file) /* no need for special case handling of setting mode on read only files needed here */ + pCifsFile = cifs_fill_filedata(file); cifs_posix_open_inode_helper(inode, file, pCifsInode, pCifsFile, oplock, netfid); goto out; -- cgit v1.2.3