summaryrefslogtreecommitdiff
path: root/fs/cifs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_fs_sb.h3
-rw-r--r--fs/cifs/cifsfs.c11
-rw-r--r--fs/cifs/cifssmb.c34
-rw-r--r--fs/cifs/file.c28
4 files changed, 72 insertions, 4 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 4797787c6a44..246a167cb913 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -18,6 +18,8 @@
#ifndef _CIFS_FS_SB_H
#define _CIFS_FS_SB_H
+#include <linux/backing-dev.h>
+
#define CIFS_MOUNT_NO_PERM 1 /* do not do client vfs_perm check */
#define CIFS_MOUNT_SET_UID 2 /* set current's euid in create etc. */
#define CIFS_MOUNT_SERVER_INUM 4 /* inode numbers from uniqueid from server */
@@ -50,5 +52,6 @@ struct cifs_sb_info {
#ifdef CONFIG_CIFS_DFS_UPCALL
char *mountdata; /* mount options received at mount time */
#endif
+ struct backing_dev_info bdi;
};
#endif /* _CIFS_FS_SB_H */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 5183bc2a1916..ad235d604a0b 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -103,6 +103,12 @@ cifs_read_super(struct super_block *sb, void *data,
if (cifs_sb == NULL)
return -ENOMEM;
+ rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
+ if (rc) {
+ kfree(cifs_sb);
+ return rc;
+ }
+
#ifdef CONFIG_CIFS_DFS_UPCALL
/* copy mount params to sb for use in submounts */
/* BB: should we move this after the mount so we
@@ -115,6 +121,7 @@ cifs_read_super(struct super_block *sb, void *data,
int len = strlen(data);
cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
if (cifs_sb->mountdata == NULL) {
+ bdi_destroy(&cifs_sb->bdi);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
return -ENOMEM;
@@ -135,6 +142,7 @@ cifs_read_super(struct super_block *sb, void *data,
sb->s_magic = CIFS_MAGIC_NUMBER;
sb->s_op = &cifs_super_ops;
+ sb->s_bdi = &cifs_sb->bdi;
/* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
sb->s_blocksize =
cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
@@ -183,6 +191,7 @@ out_mount_failed:
}
#endif
unload_nls(cifs_sb->local_nls);
+ bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
}
return rc;
@@ -214,6 +223,7 @@ cifs_put_super(struct super_block *sb)
#endif
unload_nls(cifs_sb->local_nls);
+ bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
unlock_kernel();
@@ -808,6 +818,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
.release = cifs_close,
.fsync = cifs_fsync,
.flush = cifs_flush,
+ .mmap = cifs_file_mmap,
.splice_read = generic_file_splice_read,
#ifdef CONFIG_CIFS_POSIX
.unlocked_ioctl = cifs_ioctl,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 3f4fbd670507..5d3f29fef532 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1431,6 +1431,8 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
__u32 bytes_sent;
__u16 byte_count;
+ *nbytes = 0;
+
/* cFYI(1, ("write at %lld %d bytes", offset, count));*/
if (tcon->ses == NULL)
return -ECONNABORTED;
@@ -1513,11 +1515,18 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error in write = %d", rc));
- *nbytes = 0;
} else {
*nbytes = le16_to_cpu(pSMBr->CountHigh);
*nbytes = (*nbytes) << 16;
*nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. Some
+ * OS/2 servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
}
cifs_buf_release(pSMB);
@@ -1606,6 +1615,14 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
*nbytes = le16_to_cpu(pSMBr->CountHigh);
*nbytes = (*nbytes) << 16;
*nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. OS/2
+ * servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
}
/* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
@@ -1794,8 +1811,21 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
}
parm_data = (struct cifs_posix_lock *)
((char *)&pSMBr->hdr.Protocol + data_offset);
- if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
+ if (parm_data->lock_type == __constant_cpu_to_le16(CIFS_UNLCK))
pLockData->fl_type = F_UNLCK;
+ else {
+ if (parm_data->lock_type ==
+ __constant_cpu_to_le16(CIFS_RDLCK))
+ pLockData->fl_type = F_RDLCK;
+ else if (parm_data->lock_type ==
+ __constant_cpu_to_le16(CIFS_WRLCK))
+ pLockData->fl_type = F_WRLCK;
+
+ pLockData->fl_start = parm_data->start;
+ pLockData->fl_end = parm_data->start +
+ parm_data->length - 1;
+ pLockData->fl_pid = parm_data->pid;
+ }
}
plk_err_exit:
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 058b390d3da8..9b11a8f56f3a 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -839,8 +839,32 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
} else {
/* if rc == ERR_SHARING_VIOLATION ? */
- rc = 0; /* do not change lock type to unlock
- since range in use */
+ rc = 0;
+
+ if (lockType & LOCKING_ANDX_SHARED_LOCK) {
+ pfLock->fl_type = F_WRLCK;
+ } else {
+ rc = CIFSSMBLock(xid, tcon, netfid, length,
+ pfLock->fl_start, 0, 1,
+ lockType | LOCKING_ANDX_SHARED_LOCK,
+ 0 /* wait flag */);
+ if (rc == 0) {
+ rc = CIFSSMBLock(xid, tcon, netfid,
+ length, pfLock->fl_start, 1, 0,
+ lockType |
+ LOCKING_ANDX_SHARED_LOCK,
+ 0 /* wait flag */);
+ pfLock->fl_type = F_RDLCK;
+ if (rc != 0)
+ cERROR(1, ("Error unlocking "
+ "previously locked range %d "
+ "during test of lock", rc));
+ rc = 0;
+ } else {
+ pfLock->fl_type = F_WRLCK;
+ rc = 0;
+ }
+ }
}
FreeXid(xid);
generated by cgit v1.2.3 (git 2.0.4) at 2024-10-12 11:20:43 +0000