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-rw-r--r--fs/cifs/file.c82
1 files changed, 46 insertions, 36 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index e2b4ce1dad66..944d2b9e092d 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -110,7 +110,6 @@ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file,
&pCifsInode->openFileList);
}
write_unlock(&GlobalSMBSeslock);
- write_unlock(&file->f_owner.lock);
if (pCifsInode->clientCanCacheRead) {
/* we have the inode open somewhere else
no need to discard cache data */
@@ -201,7 +200,7 @@ int cifs_open(struct inode *inode, struct file *file)
} else {
if (file->f_flags & O_EXCL)
cERROR(1, ("could not find file instance for "
- "new file %p ", file));
+ "new file %p", file));
}
}
@@ -260,10 +259,15 @@ int cifs_open(struct inode *inode, struct file *file)
rc = -ENOMEM;
goto out;
}
- rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, desiredAccess,
- CREATE_NOT_DIR, &netfid, &oplock, buf,
+
+ if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
+ rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
+ desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR);
+ else
+ rc = -EIO; /* no NT SMB support fall into legacy open below */
+
if (rc == -EIO) {
/* Old server, try legacy style OpenX */
rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
@@ -272,7 +276,7 @@ int cifs_open(struct inode *inode, struct file *file)
& CIFS_MOUNT_MAP_SPECIAL_CHR);
}
if (rc) {
- cFYI(1, ("cifs_open returned 0x%x ", rc));
+ cFYI(1, ("cifs_open returned 0x%x", rc));
goto out;
}
file->private_data =
@@ -282,7 +286,6 @@ int cifs_open(struct inode *inode, struct file *file)
goto out;
}
pCifsFile = cifs_init_private(file->private_data, inode, file, netfid);
- write_lock(&file->f_owner.lock);
write_lock(&GlobalSMBSeslock);
list_add(&pCifsFile->tlist, &pTcon->openFileList);
@@ -293,7 +296,6 @@ int cifs_open(struct inode *inode, struct file *file)
&oplock, buf, full_path, xid);
} else {
write_unlock(&GlobalSMBSeslock);
- write_unlock(&file->f_owner.lock);
}
if (oplock & CIFS_CREATE_ACTION) {
@@ -322,7 +324,7 @@ out:
return rc;
}
-/* Try to reaquire byte range locks that were released when session */
+/* Try to reacquire byte range locks that were released when session */
/* to server was lost */
static int cifs_relock_file(struct cifsFileInfo *cifsFile)
{
@@ -409,8 +411,8 @@ static int cifs_reopen_file(struct inode *inode, struct file *file,
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc) {
up(&pCifsFile->fh_sem);
- cFYI(1, ("cifs_open returned 0x%x ", rc));
- cFYI(1, ("oplock: %d ", oplock));
+ cFYI(1, ("cifs_open returned 0x%x", rc));
+ cFYI(1, ("oplock: %d", oplock));
} else {
pCifsFile->netfid = netfid;
pCifsFile->invalidHandle = FALSE;
@@ -472,7 +474,6 @@ int cifs_close(struct inode *inode, struct file *file)
pTcon = cifs_sb->tcon;
if (pSMBFile) {
pSMBFile->closePend = TRUE;
- write_lock(&file->f_owner.lock);
if (pTcon) {
/* no sense reconnecting to close a file that is
already closed */
@@ -487,23 +488,18 @@ int cifs_close(struct inode *inode, struct file *file)
the struct would be in each open file,
but this should give enough time to
clear the socket */
- write_unlock(&file->f_owner.lock);
cERROR(1,("close with pending writes"));
msleep(timeout);
- write_lock(&file->f_owner.lock);
timeout *= 4;
}
- write_unlock(&file->f_owner.lock);
rc = CIFSSMBClose(xid, pTcon,
pSMBFile->netfid);
- write_lock(&file->f_owner.lock);
}
}
write_lock(&GlobalSMBSeslock);
list_del(&pSMBFile->flist);
list_del(&pSMBFile->tlist);
write_unlock(&GlobalSMBSeslock);
- write_unlock(&file->f_owner.lock);
kfree(pSMBFile->search_resume_name);
kfree(file->private_data);
file->private_data = NULL;
@@ -531,7 +527,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
(struct cifsFileInfo *)file->private_data;
char *ptmp;
- cFYI(1, ("Closedir inode = 0x%p with ", inode));
+ cFYI(1, ("Closedir inode = 0x%p", inode));
xid = GetXid();
@@ -605,7 +601,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
}
if (pfLock->fl_flags & FL_ACCESS)
cFYI(1, ("Process suspended by mandatory locking - "
- "not implemented yet "));
+ "not implemented yet"));
if (pfLock->fl_flags & FL_LEASE)
cFYI(1, ("Lease on file - not implemented yet"));
if (pfLock->fl_flags &
@@ -1079,9 +1075,9 @@ static int cifs_writepages(struct address_space *mapping,
unsigned int bytes_written;
struct cifs_sb_info *cifs_sb;
int done = 0;
- pgoff_t end = -1;
+ pgoff_t end;
pgoff_t index;
- int is_range = 0;
+ int range_whole = 0;
struct kvec iov[32];
int len;
int n_iov = 0;
@@ -1122,16 +1118,14 @@ static int cifs_writepages(struct address_space *mapping,
xid = GetXid();
pagevec_init(&pvec, 0);
- if (wbc->sync_mode == WB_SYNC_NONE)
+ if (wbc->range_cyclic) {
index = mapping->writeback_index; /* Start from prev offset */
- else {
- index = 0;
- scanned = 1;
- }
- if (wbc->start || wbc->end) {
- index = wbc->start >> PAGE_CACHE_SHIFT;
- end = wbc->end >> PAGE_CACHE_SHIFT;
- is_range = 1;
+ end = -1;
+ } else {
+ index = wbc->range_start >> PAGE_CACHE_SHIFT;
+ end = wbc->range_end >> PAGE_CACHE_SHIFT;
+ if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
+ range_whole = 1;
scanned = 1;
}
retry:
@@ -1167,7 +1161,7 @@ retry:
break;
}
- if (unlikely(is_range) && (page->index > end)) {
+ if (!wbc->range_cyclic && page->index > end) {
done = 1;
unlock_page(page);
break;
@@ -1271,7 +1265,7 @@ retry:
index = 0;
goto retry;
}
- if (!is_range)
+ if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = index;
FreeXid(xid);
@@ -1377,7 +1371,7 @@ int cifs_fsync(struct file *file, struct dentry *dentry, int datasync)
xid = GetXid();
- cFYI(1, ("Sync file - name: %s datasync: 0x%x ",
+ cFYI(1, ("Sync file - name: %s datasync: 0x%x",
dentry->d_name.name, datasync));
rc = filemap_fdatawrite(inode->i_mapping);
@@ -1406,7 +1400,7 @@ int cifs_fsync(struct file *file, struct dentry *dentry, int datasync)
/* fill in rpages then
result = cifs_pagein_inode(inode, index, rpages); */ /* BB finish */
-/* cFYI(1, ("rpages is %d for sync page of Index %ld ", rpages, index));
+/* cFYI(1, ("rpages is %d for sync page of Index %ld", rpages, index));
#if 0
if (rc < 0)
@@ -1419,7 +1413,7 @@ int cifs_fsync(struct file *file, struct dentry *dentry, int datasync)
* As file closes, flush all cached write data for this inode checking
* for write behind errors.
*/
-int cifs_flush(struct file *file)
+int cifs_flush(struct file *file, fl_owner_t id)
{
struct inode * inode = file->f_dentry->d_inode;
int rc = 0;
@@ -1838,7 +1832,7 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
if (rc < 0)
goto io_error;
else
- cFYI(1, ("Bytes read %d ",rc));
+ cFYI(1, ("Bytes read %d",rc));
file->f_dentry->d_inode->i_atime =
current_fs_time(file->f_dentry->d_inode->i_sb);
@@ -1948,7 +1942,7 @@ static int cifs_prepare_write(struct file *file, struct page *page,
return 0;
}
-struct address_space_operations cifs_addr_ops = {
+const struct address_space_operations cifs_addr_ops = {
.readpage = cifs_readpage,
.readpages = cifs_readpages,
.writepage = cifs_writepage,
@@ -1959,3 +1953,19 @@ struct address_space_operations cifs_addr_ops = {
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
};
+
+/*
+ * cifs_readpages requires the server to support a buffer large enough to
+ * contain the header plus one complete page of data. Otherwise, we need
+ * to leave cifs_readpages out of the address space operations.
+ */
+const struct address_space_operations cifs_addr_ops_smallbuf = {
+ .readpage = cifs_readpage,
+ .writepage = cifs_writepage,
+ .writepages = cifs_writepages,
+ .prepare_write = cifs_prepare_write,
+ .commit_write = cifs_commit_write,
+ .set_page_dirty = __set_page_dirty_nobuffers,
+ /* .sync_page = cifs_sync_page, */
+ /* .direct_IO = */
+};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.