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-rw-r--r--fs/cifs/file.c74
1 files changed, 60 insertions, 14 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 409e4f523e6..fa04a00d126 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -40,6 +40,7 @@
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
+#include "fscache.h"
static inline int cifs_convert_flags(unsigned int flags)
{
@@ -282,6 +283,9 @@ int cifs_open(struct inode *inode, struct file *file)
CIFSSMBClose(xid, tcon, netfid);
rc = -ENOMEM;
}
+
+ cifs_fscache_set_inode_cookie(inode, file);
+
goto out;
} else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
if (tcon->ses->serverNOS)
@@ -373,6 +377,8 @@ int cifs_open(struct inode *inode, struct file *file)
goto out;
}
+ cifs_fscache_set_inode_cookie(inode, file);
+
if (oplock & CIFS_CREATE_ACTION) {
/* time to set mode which we can not set earlier due to
problems creating new read-only files */
@@ -427,7 +433,7 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
__u16 netfid;
if (file->private_data)
- pCifsFile = (struct cifsFileInfo *)file->private_data;
+ pCifsFile = file->private_data;
else
return -EBADF;
@@ -565,8 +571,7 @@ int cifs_close(struct inode *inode, struct file *file)
int xid, timeout;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
- struct cifsFileInfo *pSMBFile =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *pSMBFile = file->private_data;
xid = GetXid();
@@ -641,8 +646,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
{
int rc = 0;
int xid;
- struct cifsFileInfo *pCFileStruct =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *pCFileStruct = file->private_data;
char *ptmp;
cFYI(1, "Closedir inode = 0x%p", inode);
@@ -863,8 +867,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
length, pfLock,
posix_lock_type, wait_flag);
} else {
- struct cifsFileInfo *fid =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *fid = file->private_data;
if (numLock) {
rc = CIFSSMBLock(xid, tcon, netfid, length,
@@ -965,7 +968,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
if (file->private_data == NULL)
return -EBADF;
- open_file = (struct cifsFileInfo *) file->private_data;
+ open_file = file->private_data;
rc = generic_write_checks(file, poffset, &write_size, 0);
if (rc)
@@ -1067,7 +1070,7 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
if (file->private_data == NULL)
return -EBADF;
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
xid = GetXid();
@@ -1651,8 +1654,7 @@ int cifs_fsync(struct file *file, int datasync)
int xid;
int rc = 0;
struct cifsTconInfo *tcon;
- struct cifsFileInfo *smbfile =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *smbfile = file->private_data;
struct inode *inode = file->f_path.dentry->d_inode;
xid = GetXid();
@@ -1756,7 +1758,7 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, "attempting read on write only file instance");
@@ -1837,7 +1839,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, "attempting read on write only file instance");
@@ -1942,6 +1944,9 @@ static void cifs_copy_cache_pages(struct address_space *mapping,
SetPageUptodate(page);
unlock_page(page);
data += PAGE_CACHE_SIZE;
+
+ /* add page to FS-Cache */
+ cifs_readpage_to_fscache(mapping->host, page);
}
return;
}
@@ -1968,10 +1973,19 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
pTcon = cifs_sb->tcon;
+ /*
+ * Reads as many pages as possible from fscache. Returns -ENOBUFS
+ * immediately if the cookie is negative
+ */
+ rc = cifs_readpages_from_fscache(mapping->host, mapping, page_list,
+ &num_pages);
+ if (rc == 0)
+ goto read_complete;
+
cFYI(DBG2, "rpages: num pages %d", num_pages);
for (i = 0; i < num_pages; ) {
unsigned contig_pages;
@@ -2082,6 +2096,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
smb_read_data = NULL;
}
+read_complete:
FreeXid(xid);
return rc;
}
@@ -2092,6 +2107,11 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
char *read_data;
int rc;
+ /* Is the page cached? */
+ rc = cifs_readpage_from_fscache(file->f_path.dentry->d_inode, page);
+ if (rc == 0)
+ goto read_complete;
+
page_cache_get(page);
read_data = kmap(page);
/* for reads over a certain size could initiate async read ahead */
@@ -2111,11 +2131,17 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
flush_dcache_page(page);
SetPageUptodate(page);
+
+ /* send this page to the cache */
+ cifs_readpage_to_fscache(file->f_path.dentry->d_inode, page);
+
rc = 0;
io_error:
kunmap(page);
page_cache_release(page);
+
+read_complete:
return rc;
}
@@ -2265,6 +2291,22 @@ out:
return rc;
}
+static int cifs_release_page(struct page *page, gfp_t gfp)
+{
+ if (PagePrivate(page))
+ return 0;
+
+ return cifs_fscache_release_page(page, gfp);
+}
+
+static void cifs_invalidate_page(struct page *page, unsigned long offset)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(page->mapping->host);
+
+ if (offset == 0)
+ cifs_fscache_invalidate_page(page, &cifsi->vfs_inode);
+}
+
static void
cifs_oplock_break(struct slow_work *work)
{
@@ -2338,6 +2380,8 @@ const struct address_space_operations cifs_addr_ops = {
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
+ .releasepage = cifs_release_page,
+ .invalidatepage = cifs_invalidate_page,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
};
@@ -2354,6 +2398,8 @@ const struct address_space_operations cifs_addr_ops_smallbuf = {
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
+ .releasepage = cifs_release_page,
+ .invalidatepage = cifs_invalidate_page,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 05:53:29 +0000