smb/client/smb2ops.c

1460 	/* End of file and Attributes should not have to be updated on close */
1933 	/* if file already sparse don't bother setting sparse again */
1945 	 * in the file attributes. If we fail setting sparse though we
1948 	 * if the file is repeatedly extended.
1977 	 * If extending file more than one page make sparse. Many Linux fs
1985 		/* whether set sparse succeeds or not, extend the file */
2026 		 * here in addition to setting the file size, in reflink
2027 		 * it is likely that the target file is sparse. Its allocation
2029 		 * to make sure that file's cached size is updated immediately
2171 smb3_notify(const unsigned int xid, struct file *pfile,
3061 		 * When querying an ACL, even if the file is a symlink
3170 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3173 	struct cifsFileInfo *cfile = file->private_data;
3188 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3192 	struct inode *inode = file_inode(file);
3194 	struct cifsFileInfo *cfile = file->private_data;
3213 	/* if file not oplocked can't be sure whether asking to extend size */
3218 	rc = smb3_zero_data(file, tcon, offset, len, xid);
3223 	 * do we also need to change the size of the file?
3251 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3254 	struct inode *inode = file_inode(file);
3255 	struct cifsFileInfo *cfile = file->private_data;
3264 	/* Need to make file sparse, if not already, before freeing range. */
3416 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3421 	struct cifsFileInfo *cfile = file->private_data;
3433 	/* if file not oplocked can't be sure whether asking to extend size */
3443 	 * Extending the file
3467 	 * Must check if file sparse. If not sparse, and since we are not
3468 	 * extending then no need to do anything since file already allocated
3477 		 * We can not preallocate pages beyond the end of the file
3485 		 * For fallocates that are partially beyond the end of file,
3486 		 * clamp len so we only fallocate up to the end of file.
3496 		 * regions of a sparse file. Since smb2 does not have a
3498 		 * We can either turn the entire file to become non-sparse
3500 		 * the whole file,  or we can overwrite the region with zeroes
3515 		 * Check if falloc starts within first few pages of file
3516 		 * and ends within a few pages of the end of file to
3517 		 * ensure that most of file is being forced to be
3518 		 * fallocated now. If so then setting whole file sparse
3520 		 * or end of the file non-sparse via set_sparse is harmless.
3543 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3548 	struct inode *inode = file_inode(file);
3550 	struct cifsFileInfo *cfile = file->private_data;
3598 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3603 	struct cifsFileInfo *cfile = file->private_data;
3604 	struct inode *inode = file_inode(file);
3640 	rc = smb3_zero_data(file, tcon, off, len, xid);
3653 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3655 	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3664 		return generic_file_llseek(file, offset, whence);
3732 		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3812 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3817 		return smb3_punch_hole(file, tcon, off, len);
3820 			return smb3_zero_range(file, tcon, off, len, true);
3821 		return smb3_zero_range(file, tcon, off, len, false);
3823 		return smb3_simple_falloc(file, tcon, off, len, true);
3825 		return smb3_collapse_range(file, tcon, off, len);
3827 		return smb3_insert_range(file, tcon, off, len);
3829 		return smb3_simple_falloc(file, tcon, off, len, false);