Commit 31742c5a authored by Steve French's avatar Steve French

enable fallocate punch hole ("fallocate -p") for SMB3

Implement FALLOC_FL_PUNCH_HOLE (which does not change the file size
fortunately so this matches the behavior of the equivalent SMB3
fsctl call) for SMB3 mounts.  This allows "fallocate -p" to work.
It requires that the server support setting files as sparse
(which Windows allows).
Signed-off-by: default avatarSteve French <smfrench@gmail.com>
parent ad3829cf
...@@ -207,6 +207,19 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf) ...@@ -207,6 +207,19 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0; return 0;
} }
static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
{
struct super_block *sb = file->f_path.dentry->d_sb;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
struct TCP_Server_Info *server = tcon->ses->server;
if (server->ops->fallocate)
return server->ops->fallocate(file, tcon, mode, off, len);
return -EOPNOTSUPP;
}
static int cifs_permission(struct inode *inode, int mask) static int cifs_permission(struct inode *inode, int mask)
{ {
struct cifs_sb_info *cifs_sb; struct cifs_sb_info *cifs_sb;
...@@ -909,6 +922,7 @@ const struct file_operations cifs_file_ops = { ...@@ -909,6 +922,7 @@ const struct file_operations cifs_file_ops = {
.unlocked_ioctl = cifs_ioctl, .unlocked_ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_file_strict_ops = { const struct file_operations cifs_file_strict_ops = {
...@@ -928,6 +942,7 @@ const struct file_operations cifs_file_strict_ops = { ...@@ -928,6 +942,7 @@ const struct file_operations cifs_file_strict_ops = {
.unlocked_ioctl = cifs_ioctl, .unlocked_ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_file_direct_ops = { const struct file_operations cifs_file_direct_ops = {
...@@ -948,6 +963,7 @@ const struct file_operations cifs_file_direct_ops = { ...@@ -948,6 +963,7 @@ const struct file_operations cifs_file_direct_ops = {
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.llseek = cifs_llseek, .llseek = cifs_llseek,
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_file_nobrl_ops = { const struct file_operations cifs_file_nobrl_ops = {
...@@ -966,6 +982,7 @@ const struct file_operations cifs_file_nobrl_ops = { ...@@ -966,6 +982,7 @@ const struct file_operations cifs_file_nobrl_ops = {
.unlocked_ioctl = cifs_ioctl, .unlocked_ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_file_strict_nobrl_ops = { const struct file_operations cifs_file_strict_nobrl_ops = {
...@@ -984,6 +1001,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = { ...@@ -984,6 +1001,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
.unlocked_ioctl = cifs_ioctl, .unlocked_ioctl = cifs_ioctl,
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_file_direct_nobrl_ops = { const struct file_operations cifs_file_direct_nobrl_ops = {
...@@ -1003,6 +1021,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = { ...@@ -1003,6 +1021,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
#endif /* CONFIG_CIFS_POSIX */ #endif /* CONFIG_CIFS_POSIX */
.llseek = cifs_llseek, .llseek = cifs_llseek,
.setlease = cifs_setlease, .setlease = cifs_setlease,
.fallocate = cifs_fallocate,
}; };
const struct file_operations cifs_dir_ops = { const struct file_operations cifs_dir_ops = {
......
...@@ -411,6 +411,8 @@ struct smb_version_operations { ...@@ -411,6 +411,8 @@ struct smb_version_operations {
unsigned int *, unsigned int *); unsigned int *, unsigned int *);
/* check if we need to issue closedir */ /* check if we need to issue closedir */
bool (*dir_needs_close)(struct cifsFileInfo *); bool (*dir_needs_close)(struct cifsFileInfo *);
long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
loff_t);
}; };
struct smb_version_values { struct smb_version_values {
......
...@@ -1015,6 +1015,50 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, ...@@ -1015,6 +1015,50 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
return rc; return rc;
} }
static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
loff_t offset, loff_t len)
{
struct inode *inode;
struct cifsInodeInfo *cifsi;
struct cifsFileInfo *cfile = file->private_data;
struct file_zero_data_information fsctl_buf;
long rc;
unsigned int xid;
__u8 set_sparse = 1;
xid = get_xid();
inode = cfile->dentry->d_inode;
cifsi = CIFS_I(inode);
/* Need to make file sparse, if not already, before freeing range. */
/* Consider adding equivalent for compressed since it could also work */
if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
return -EOPNOTSUPP;
cifs_dbg(FYI, "offset %lld len %lld", offset, len);
fsctl_buf.FileOffset = cpu_to_le64(offset);
fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
true /* is_fctl */, (char *)&fsctl_buf,
sizeof(struct file_zero_data_information), NULL, NULL);
free_xid(xid);
return rc;
}
static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
loff_t off, loff_t len)
{
/* KEEP_SIZE already checked for by do_fallocate */
if (mode & FALLOC_FL_PUNCH_HOLE)
return smb3_punch_hole(file, tcon, off, len);
return -EOPNOTSUPP;
}
static void static void
smb2_downgrade_oplock(struct TCP_Server_Info *server, smb2_downgrade_oplock(struct TCP_Server_Info *server,
struct cifsInodeInfo *cinode, bool set_level2) struct cifsInodeInfo *cinode, bool set_level2)
...@@ -1463,6 +1507,7 @@ struct smb_version_operations smb30_operations = { ...@@ -1463,6 +1507,7 @@ struct smb_version_operations smb30_operations = {
.validate_negotiate = smb3_validate_negotiate, .validate_negotiate = smb3_validate_negotiate,
.wp_retry_size = smb2_wp_retry_size, .wp_retry_size = smb2_wp_retry_size,
.dir_needs_close = smb2_dir_needs_close, .dir_needs_close = smb2_dir_needs_close,
.fallocate = smb3_fallocate,
}; };
struct smb_version_values smb20_values = { struct smb_version_values smb20_values = {
......
...@@ -573,6 +573,12 @@ struct copychunk_ioctl { ...@@ -573,6 +573,12 @@ struct copychunk_ioctl {
__u32 Reserved2; __u32 Reserved2;
} __packed; } __packed;
/* this goes in the ioctl buffer when doing FSCTL_SET_ZERO_DATA */
struct file_zero_data_information {
__le64 FileOffset;
__le64 BeyondFinalZero;
} __packed;
struct copychunk_ioctl_rsp { struct copychunk_ioctl_rsp {
__le32 ChunksWritten; __le32 ChunksWritten;
__le32 ChunkBytesWritten; __le32 ChunkBytesWritten;
......
...@@ -63,7 +63,7 @@ ...@@ -63,7 +63,7 @@
#define FSCTL_SET_OBJECT_ID_EXTENDED 0x000900BC /* BB add struct */ #define FSCTL_SET_OBJECT_ID_EXTENDED 0x000900BC /* BB add struct */
#define FSCTL_CREATE_OR_GET_OBJECT_ID 0x000900C0 /* BB add struct */ #define FSCTL_CREATE_OR_GET_OBJECT_ID 0x000900C0 /* BB add struct */
#define FSCTL_SET_SPARSE 0x000900C4 /* BB add struct */ #define FSCTL_SET_SPARSE 0x000900C4 /* BB add struct */
#define FSCTL_SET_ZERO_DATA 0x000900C8 /* BB add struct */ #define FSCTL_SET_ZERO_DATA 0x000980C8
#define FSCTL_SET_ENCRYPTION 0x000900D7 /* BB add struct */ #define FSCTL_SET_ENCRYPTION 0x000900D7 /* BB add struct */
#define FSCTL_ENCRYPTION_FSCTL_IO 0x000900DB /* BB add struct */ #define FSCTL_ENCRYPTION_FSCTL_IO 0x000900DB /* BB add struct */
#define FSCTL_WRITE_RAW_ENCRYPTED 0x000900DF /* BB add struct */ #define FSCTL_WRITE_RAW_ENCRYPTED 0x000900DF /* BB add struct */
......
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